Actuator with feed speed variator

FIELD: machine building.

SUBSTANCE: valve actuator system consists of actuator to displace actuator first rod. Note here that said actuator comprises body and control actuating element arranged therein and connected with said first rod. Note also that said control actuating component and body define the position of the first and second brake chambers. Note here that control fluid is forced into first brake chamber to displace control actuator in first direction. Note here that control fluid is forced into second brake chamber to displace control actuator in second direction, opposite the first one. Besides, it comprises feed rate variator connected with actuator. Note that said variator comprises a correction actuator and spring for engagement with said correction actuator to displace actuator first rod to preset position.

EFFECT: perfected design.

22 cl, 18 dwg

 

The technical field

The present disclosure of the subject invention generally relates to actuators valve and, more particularly, to actuators valve with a device for changing the feed rate.

The level of technology

Control valves (for example, spool valves with a sliding rod, rotary valves, etc.) are widely used in industrial process control to regulate the flow of current technological environments. Such spool valves, such as gate valves, ball valves, etc. usually come Bolotnikova stem (for example, a sliding rod, which moves the component flow control (for example, the valve stem), located in the path of the fluid from its open position intended for transmission of the fluid flow through the valve to its closed position, designed to prevent the passage of fluid through the valve. Control valve typically contains the actuator (e.g., Executive, pneumatic or hydraulic mechanism, etc. to transfer the control valve in automatic mode. In the process control block (for example, the installation device) delivers control the fluid (e.g. air) in the COI is nitely mechanism for positioning the flow control in the desired position to regulate the flow of fluid through the valve. The actuator may move the component control fluid medium over the entire length of the stroke from its open position intended for transmission of the fluid flow through the valve to its closed position, designed to prevent the passage of fluid through the valve.

In practice, for connection failover systems in many applications, management of production processes require the use of actuators (for example, actuators for valve). Failover system provides protection for system management of the production process, usually by forcing the actuator and, as a consequence, the management component fluid medium to move in either fully closed or fully open position during emergencies, system failures, power and/or when the stop flow control of the fluid (e.g. air) to the actuator (for example, in the Executive pneumatic mechanism).

Some well-known Executive piston mechanisms (e.g., actuators with spring return) can provide a manual failover return. For example, well-known Executive piston mechanisms can be used in the morning the spring is in direct contact with the piston to provide a manual failover return for shifting the position of the piston in one or the other side of the stroke (for example, in the fully open or fully closed position) in case of termination of the supply control fluid to the actuator. However, in practical situations with long stroke (for example, when the length of the stroke is four (4) inches (11,4 cm) or more), such actuators with spring return in case of long stroke often slaboupravlyaemykh. That is applied in certain situations, the nominal force of the spring tension shifting actions or failover type may be sufficient to impair the operating characteristics of the actuator, because the supplied fluid and the Manager component is necessary to overcome the force of displacement of the resilient spring. And, in turn, for actuators with a long stroke will need a spring with a lower nominal tension force in order to adapt to long working course (i.e. so that the spring could be compressed along the entire length of the stroke). However, in the actuator with long stroke spring with a lower rated spring tension is often a lack of ability to generate sufficient axial pressure or force for dense input into the valve seat to prevent leakage through the CLA is an in case of system failure, in the resulting system becomes insufficient failover.

Actuators double-acting can be used in valves larger, requiring long lengths of the stroke. Actuators double acting often provide higher accuracy than actuators single acting, because actuators double-acting work in the feedback of the controlled differential pressure on the Executive component (e.g., piston) and, thus, do not rely on the spring (for example, the nominal force of the tension spring to return the actuator to the desired position (for example, in the fully open or fully closed position and so on). However, in these known actuators double acting there is no mechanical noise immunity, which provide a well-known Executive the above mechanisms with spring return, therefore, the use of actuators double-acting undesirable applied in some situations.

To provide a failover mechanism in many well-known actuator double action is used in a failover system, driven by air (for example, a pneumatic system). However, the same is known driven air failover systems require additional components (e.g., tank to pump, the upper valve of the probe/diverter valve, volume booster packs and so on), resulting in substantially increases the complexity of the mechanism and the cost of its production. In some examples some well-known actuators double-acting long stroke contain a fault-tolerant system on a spring bias or exemption action, which during operation is directly and continuously acts on the actuator (for example, on the piston). However, when using such a spring bias or abandoned actions to overcome the supplied their effort is required piston size larger than usual.

Disclosure of inventions

In one embodiment, the actuator device to change the speed of the feed contains the first actuator stem, forming a relationship with the managing Executive component and a device for changing the feed speed, forming a relationship with the Executive mechanism. In the working mode, the spring forms a communication device changes the feed speed is intended to move the first actuator stem in a predetermined position in response to a change in feed rate.

In another example described here, the embodiment of the actuator device with the La changes the feed speed contains the first actuator, equipped with the first Executive component, which is located in the first housing for positioning the first and second brake chambers. When the first actuator is operable in first and second brake chamber is supplied to the control fluid used to move the first actuating component in the first direction and the second brake chamber receives fluid management environment, designed to move the first actuating component in the direction opposite to the first second direction. The second actuator is equipped with a second actuating component located in the second housing and is intended for positioning the third and fourth brake chambers. In the third control brake chamber receives fluid management environment, designed to move the second actuating component in a position that was recorded when the first actuator were in working condition. Bias element is located in the fourth brake chamber, intended to move the first actuating component using a second actuating component in a predetermined position when the control fluid is released from the third tormoznoy the camera, and the first actuator is in an unusable state.

In another example, the composition described herein actuator includes means for moving the first actuating component between the first and second positions and means for moving the second actuating component in a position that was recorded when the displacement of the first actuator were in working condition. In addition, the actuator includes means designed to move the first actuating component using a second actuating component in a predetermined position in response to conditions of correction.

Brief description of drawings

On FIGA and 1B, shown is taken as the analogue of the known control valve and an actuator containing a known driven air trouble-free system.

On FIGA shows an embodiment described here, the actuator device to change the feed rate, shown in the locked position.

On FIGU shows an embodiment of an actuating mechanism provided on FIGA, where the actuator device to change the feed speed is depicted in the predetermined position.

On FIGA before the submitted drawing with partial opening of the inner part of the second variant implementation of the actuator, described herein and containing a device for changing the feed rate, which is depicted in the first position.

On FIGU presents another drawing with a partial opening of the inner part of the options for performing the actuator shown in FIGA, where the device for changing the feed speed is displayed in the second position.

On FIGA-4D shows a cross-section of a variant of implementation of the actuator depicted in FIGA and 3B in the first position, an intermediate position, and second in a predefined position, respectively.

On FIVE-4H shows a cross-section of a variant of implementation of the actuator depicted in FIGA and 3B, which is configured as the actuator without the possibility of closure.

FIGA the drawing with a partial opening of the inner part of the second variant implementation of the Executive mechanism described in this paper and on FIGU image of the cross-section of a variant of implementation of the actuator presented on FIGA.

On FIGA and 6B shows another embodiment of described here actuating mechanism.

The implementation of the invention

Embodiments of the described here actuators provide a device for changing the speed of the feed that does not require complicated and Dor is gostosa components, associated with known reliable systems driven fluid medium, such as those shown above. Although embodiments of the described in this paper actuators can be adapted to any length of the stroke of the valve and under any application (for example, applications to enable/disable, regulatory filing, and so on)described in the work of the Executive mechanisms are of particular advantage in applications for regulatory filing when combined with devices for controlling the fluid medium (e.g., valves), which are characterized by large length of the stroke.

Before a more detailed description of the embodiments of the Executive mechanisms against FIGA and 1B provides a brief discussion of the Assembly of the known control valve 100. If we consider FIGA and 1B, the Assembly of the known control valve 100 includes an actuator 102 for the implementation of stroke or valve 104. As shown in FIGA, the valve 104 is composed of a valve body 106, equipped with a valve seat 108, located in this place to define openings 110, which provides a passage for fluid flow between the inlet 112 and the outlet 114. Component for flow control 116, which is in the working mode about what aswat communication with the valve stem 118, moves in the first direction (for example, away from the valve seat 108 according to the location of elements on FIGA) to allow passage of the fluid flow between the inlet 112 and the outlet 114 and moves in the second direction (for example, away from the valve seat 108 according to the location of elements on FIGA) to restrict or prevent flow of fluid between the inlet 112 and the outlet 114. Thus, the velocity of the flow is allowed to pass through the control valve 100 is controlled by position, which is the component flow control 116 relative to the valve seat 108. In the cell 120, sliding, includes a locking component 116 and is located between the inlet 112 and the outlet 114 to provide certain characteristics of the stream (for example, to reduce the noise level and the probability of cavitation and so on). The valve cap 122 is connected with the housing 106 by means of brackets 124 and is used to connect the valve 104 with bracket 126 of the actuator 102.

The actuator 102, shown in FIGV, usually called the Executive piston dual-action mechanism. The actuator 102 includes a piston (not shown), which forms a working relationship with the management component 116 (FIGA)using a rod of the actuator 128. The connector rod 131 may be connected to the shaft of the Executive mechanisma and to the valve stem 118 and air move pointer 130, intended to indicate the position of the actuator 102 and, as a consequence, the position of the component flow control 116 relative to the valve seat 108 (e.g., open position, closed position and an intermediate position, and so on). The feedback sensor (not shown) may be arranged to provide a signal (e.g., a mechanical signal, an electrical signal, and so on) on the control unit or on the installation device (not shown).

During operation of the installation device in the operating mode can be connected through a servo-mechanism to the sensor feedback to control the flow of fluid (such as compressed air, hydraulic fluid, etc.) above and/or below the piston of the actuator 102 via signal transmitted by the sensor feedback.

As a result, the pressure differential across the piston moves it or in the first or in the second direction to change the position of the component flow control 116 between a closed position when the flow control 116 comes into tight contact with the valve seat 108, and a fully open position or the position of maximum flow rate when the component in the management stream 116 is located at a distance or departs from the valve seat 108.

The Assembly is taken as an analogue control valve 100 shown in FIGA and 1B, contains a fault-tolerant system 132. Failover system provides protection system of production control, causing displacement of the component flow control 116 in emergency situations in the desired position (for example, when the control unit is unable to supply control fluid to the actuator 102). In this example, the failover system 132 is driven by air and is equipped with top flap of the probe 134 used in the transmission of fluid through the actuator 102, and a tank to pump (not shown)that stores the control fluid (e.g., fluid pressure).

During operation, the upper valve of the probe 134 takes the pressure of control fluid to the actuator 102. If the pressure of the control fluid to the actuator 102 falls below a predetermined value (for example, the value set through the operating springs located in the upper valve of the probe 134), the upper valve of the probe 134 (supplied with numerous holes and sealing elements) produces a system with closed circuit and done is made by connecting the reservoir to pump to the actuator 102 for the purpose of giving back the fluid. The tank to pump supply the stored control fluid to the actuator 102 to move the component flow control 116 in any position - open, closed or intermediate - or, for example, records management component stream 116 in the last control position. Although driven by air trouble-free system 132 is very effective, it is difficult to mount, requires the installation of additional piping, space and maintenance and so on, resulting in increased cost. In addition, tank to pump, used for powered air trouble-free system 132, typically require periodic certification (for example, annual certification), because it is often classified as a reservoir of high pressure, which leads to additional costs of time and money on its maintenance. In addition, trouble-free system 132 does not provide primary (for example, on the basis of the spring) mechanical fault tolerance, which may be desired or necessary in some applications.

In other examples, alternative actuators with a long stroke can include a spring bias or refusal actions connected is about time for the Executive component (for example, to the piston) of the actuator 102 to ensure mechanical reliability. However, this bias springs typically lack the axial pressure or force (which, for example, leads to an inability to provide sufficient load on the valve seat) to the component flow control 116 were tight in the valve seat 108 in the event of loss or absence of feed fluid management fluid to the actuator 102. Therefore, such known bias of the springs usually require the installation of additional fault-tolerant system. In addition, such known spring bias or exemption action is disadvantageous because of their direct and continuous exposure during the operation of the actuator 102 (e.g., piston), resulting in the required actuator size larger than usual (for example, a piston of larger area) to overcome the forces charged in such spring bias or exemption action.

On FIGA and 2B shows an embodiment described here, the actuator 200, which includes a sample of a spring mechanism or disable the device to change the speed of the feed 202. FIGA is an illustration of a variant of implementation of the actuator 200, which shows the embodiment of the device for changes / min net and feed 202 in a fixed position. FIGV is an illustration of a variant of implementation of the actuator 200, which illustrates an embodiment of a device for changing the feed speed of 202 in the activated position. An embodiment of the actuator 200 may be used to operate or actuate the valve with a sliding rod, such as, for example, shut-off valves, spherical valves, etc., rotary valves, such as butterfly valves, ball valves, disc valves, etc. and/or any other device or equipment to control the flow. For example, an embodiment of the actuator 200, depicted in FIGA and 2B, can be used for work or start taken as sample valve 104 from FIGA.

If you look at FIGO and 2B, the device for changing the feed speed of 202 connected to the first actuator 204 (for example, to the actuator double action). The first actuator stem 206 is connected with the managing Executive component 208, such as, for example, a piston or membrane. Executive managing component 208 is located within the housing 210 for positioning the first brake chamber 212 and the second brake chamber 214. The first actuator 204 is connected to the source feeds the control fluid 216 to implement its receipt through the installation device 218. The installation device 218 delivers control the fluid in the first brake chamber 212 or the second brake chamber 214 or delete it from them through the appropriate passages 220 and 222.

The control fluid, such as compressed air, is supplied by means of the installation device 218 in the first and second brake chambers 212 and 214 to create a differential pressure on the Executive control component 208 to move either in the first direction along the axis 224, or in the second direction along the axis 224 opposite to the first direction. For example, Executive managing component 208 is moved in the first direction (e.g. up, if you look at FIGA), when the pressure of control fluid in the first brake chamber 212 acts on the first side 226 of the control of the Executive component 208, appearing more force applied to the second side 228 of the control of the Executive component 208, due to the pressure of the fluid in the second brake chamber 214 (for example, in the case of removal of the control fluid from the second brake chamber 214).

And, Vice versa, Executive managing component 208 is moved in a second opposite to the first direction (e.g. down, if you look at FIGA), when the pressure of control fluid in the second Thor is Osney chamber 214 acts on the second side 228 of the control of the Executive component 208, being more of a force applied to the first side 226 of the control of the Executive component 208, due to the pressure of the fluid in the first brake chamber 212 (for example, in the case of removal of the control fluid from the first brake chambers 212).

The device for changing the feed speed of 202 includes a housing 230, equipped Executive corrective component 232 (for example, an adjustment piston)located in the device, which determines the location of the third brake chamber 234 and the fourth brake chamber 236. Third brake chamber 234 the purpose of transmission fluid is connected to the power supply control fluid 216 through the passage 235, which directs the fluid (e.g. compressed air) in the third brake chamber 234. However, in some examples, the third brake chamber 234 the purpose of transmission fluid can be connected to any other suitable source of supply control fluid, such as, for example, supply air, the supply of hydraulic fluid so When the third brake chamber 234 receives control fluid, its pressure acts on the first side 238 corrective Executive component 232 to shift the device to change the speed of the feed 202 in a pre-recorded p is the situation, shown in FIGA. Bias element 240 (e.g., a spring) is located in the fourth brake chamber 236 and exerts a force to the second side 242 of corrective Executive component 232 for its bias towards managing Executive component 208 when the control fluid in the third brake chamber 234 consumed or released in response to a condition 234 transition for boundary value parameter supply control fluid 216. In other words, the device for changing the feed rate 202 is activated if the power supply control fluid 216 or unable to provide the supply which is under the required pressure of the control fluid in the third brake chamber 234, or removable control device (for example, the control device is implemented within are equipped with measuring devices, security systems) selectively releases the pressure of the fluid in the third brake chamber as described in more detail below.

In the fourth part of the brake chamber 236 may include a ventilation hole 244 through which may be discharged atmospheric pressure to control fluid in the third brake chamber 234 was required to overcome only the force of the bias element 240 for translation device for the modify the feedrate 202 in a fixed position, shown in FIGA. Also corrective Executive component 232 may contain a seal in circular form 245 (for example, a sealing ring mounted in the annular groove 249 to prevent the ingress of fluid into the third brake chamber 234 in the removal of air through the vent hole 244. The valve 246 (for example, the quick discharge valve) may be connected to the passage 235 between the power supply control fluid medium 216 and the third brake chamber 234 to provide a more rapid release or removal of the control fluid from the third brake chamber 234, if the power supply control fluid 216 does not work (for example, to enable more rapid actuation of the device to change the speed of the feed 202).

In this example, the corrective Executive component 232 includes a push rod or the rod 248. The push rod 248 is connected to the control of the Executive component 232 in the first end portion 250 and includes a connecting part or siteplease component 252 to the second end part 254. In this example, siteplease component 252 consists of a cylindrical body with flanged part 256. The connecting piece 252 may be a fastener connected through the groove to the end part 254 of the push rod 248, with the help of the clamp, located on the end part 254 of the push rod 248, or integrally built into the push rod 248, forming with it a single form or structure.

The push rod 248 sliding contact with the first actuator 204 through the slot 258 (for example, the vent housing 210). When activated the device Manager Executive component to change the feed speed of 202 (for example, when a power supply control fluid 216 is not working and the first actuator 204 is idle), then the fitting 252 catches Executive managing mechanism 208 and moves it to a predetermined position shown in FIGV. It should be appreciated that the pressure in the third brake chamber may be completely or only partially discharged, which results in full control by passing fasteners 252 device to change the speed of the feed 202 (that is, the predetermined position may be located at the endpoint of the path of its passage, which corresponds to a fully open or closed position or place that is located between the endpoints of the path).

During normal operation (for example, when the first actuator 204 is in working condition, and the source for the ACI control fluid is also in working condition and so on) the power supply control fluid 216 provides a supply of control fluid in the third brake chamber 234 for offset adjustment the Executive component 232 and, thus, for removal of fasteners 252 push rod 248 to the control of the Executive component 208. The first actuator 204 is in a working state when the power supply control fluid 216 provides its filing on the first and/or second brake chamber 212 and/or 214 through the installation device 218 and the corresponding passages 220 and 222.

For example, during emergency situations or in case of failure of supply control fluid 216 latter could be generated or removed from the first and second brake chambers 212 and 214 through the installation device 218. In the actuator 200 can be included upper valve of the probe (for example, technoparty the top valve of the probe) and/or solenoid valve 260 to quickly generate or delete the control fluid from the first and second brake chambers 212 and 214. Also by removal of the control fluid from the first and second brake chambers 212 and 214, it is also deleted from the third brake chamber 234 through the valve 246. Remove the control fluid from the third brake chamber 234 causes the lengthening of the deflecting element 240, which moves corrective Executive component 232 and the push rod 248 in a straight path along the axis 224 in the example is in relation to the control of the Executive component 208 in response to the condition of exceeding the limiting values of the parameters of the supply control fluid 216. The fitting 252 catches Executive managing component 208 (e.g., the second side 228 of the control of the Executive component 208) and moves it in a predetermined position as shown in FIGV. Thus, an embodiment described here, the actuator 200 provides a device for changing the feed speed is 202, which affects Executive managing component 208 when the power supply control fluid 216 is not running or is turned off. It should be appreciated that the device for changing the feed speed of 202 can be activated as a failover device when the detected loss of fluid or in any situation as defined by the system operator. That is, in any situation where the system operator wants to activate the device for changing the speed of the feed 202, it is possible to activate the solenoid valve 260.

On FIGA the drawing with a partial opening of the inner part of the options for performing the other of the actuator 300, described here, which is equipped with a device for changing the feeding speed 302, shown in the locked or in the inactive position. In FIG. 3 In the drawing with a partial opening of the inner part of the options for performing the actuator 300, shown is about on FIGA, which is equipped with a device for changing the feeding speed 302, shown in an activated or in a predefined position.

If we consider FIGA and 3B, an embodiment of the actuator 300 comprises a control actuator 304, configured as the actuator is double-acting. A member of the steering actuator 304 includes a housing 306, appointed managing Executive component, such as, for example, the piston. Executive managing component 308 determines the location of the first brake chamber 310 and the second brake chamber 312, which receives control fluid (e.g. compressed air), designed to move the control of the Executive component 308 in the first or second direction due to the differential pressure on the Executive control component 308, the generated fluid medium in the first and second brake chambers 310 and 312.

As shown, the structure of the device to change the speed of the feeder 302 includes a housing 318, equipped corrective Executive component 320 (e.g., piston, diaphragm, etc. and placed there to determine the position of the third brake chamber 322 and the fourth brake chamber 324. In the third brake chamber 322 from a source of supply control fluid environments is (for example, the power supply control fluid 216, as indicated on FIGA and 2B), which is to supply the fluid may be connected to the first and second brake chambers 310 and 312 must be managing fluid (e.g. compressed air, hydraulic fluid, etc). The pressure of the fluid in the third brake chamber 322 of the acts on the first surface 326 corrective Executive component 320, causing it to move in the first direction or holding in a fixed position (for example, as shown in FIGA). Bias element 328 (e.g., a spring) is placed in the fourth brake chamber 324 to offset corrective Executive component 320 in the second opposite to the first direction, so that in case the pressure of the fluid in the third brake chamber 322 on the first surface 326, which is less than the force applied bias element 328 to the second surface 330 corrective Executive component 320 (e.g., when control fluid is removed from the third brake chamber 322), then the correction Executive component 320 is moved in the second direction. In other words, corrective Executive component 320 is moved in a predetermined position in response to the inability of the source under the Chi control fluid to ensure that it arrives in the first and second brake chambers 310 and 312 of the control actuator 304 and, as a consequence, also the third brake chamber 322.

In the example on FIGA and 3B bias element 328 is shown in the form of a spring, located between the seat springs 332 and the shell for holding the spring 334. Corrective Executive component 320, bias element 328, Jack springs 332 and the housing 334 can be pre-arranged at a height as shown in FIGV (for example, mainly at a height equal to the height or size of the housing 318). In this approach, the install shell 334 facilitates Assembly and maintenance options for performing the actuator 300 by preventing the output of the bias element 328 of the housing 318 during disassembly of the actuator for maintenance or repair work. Case 334, sliding, forms a connection with the socket, the spring 332 through the rods 336 (e.g., bolts) so that the shell 334 moves along (e.g., slides) adjustment of the actuator 320 (for example, when the spring 328 is compressed or stretched).

In this example, the corrective Executive component 320 is shown as a piston with a part 340, in which there is a recess, and a groove 342 to log back sliding stem actuator 344, which during operation forms a connection with the valve stem 345. In other note the pax corrective Executive component 320 may be a membrane or any other suitable actuating component. As shown, the actuator stem 344 consists of the first actuator stem 346 connected to the second or the elongated rod of the actuator 348. In other examples, the actuator stem 344 may be a single or one-piece structure. The first actuator stem 346 is connected with the managing Executive component 308 in the first end portion 350 and the second actuator stem 348 in the second end portion 352. The move pointer 354 may be connected to the second actuator stem 348, and the valve 345 is intended to determine the position of managing Executive component 308 and, as a consequence, the position of the component flow control 116 (PIGV) relative to the valve seat 108 (FIGU, for example, open position, closed position, an intermediate position, etc.).

Part of options for performing the actuator 300 also includes a connector or fastener 356. As shown, the fitting 356 forms a communication with the first actuator stem 346 and the second actuator stem 348. The fitting 356 has a cylindrical housing 358 with a projecting part or a circular protruding element 360. As described in more detail below, the fitting 356 to which RNA cling to the part of the device to change the speed of the feeder 302 (e.g., corrective Executive component 320) in response to a failure of the supply control fluid (i.e., when the control actuator 304 is in an unusable state.). As shown in FIGV, the protruding portion 360 comes in contact with provided with a notch part 340 corrective Executive component 320 for connection in the operating mode to the adjustment Executive component 320 and to the Executive Manager component 308 in the case, when the control actuator is in an unusable state. In other examples, the fitting 356 may be built into the actuator stem 344 as one with him or one-piece element or structure. However, in other examples, the fitting 356 may take any other suitable shape and/or may be any suitable connector, which is operatively and selectively connected with the managing Executive component 308 and corrective Executive component 320 then, when the control actuator 304 is in an unusable state.

As shown, the first flange 362 of the housing 306 is connected to the first flange 364 of the housing 318 using fasteners 366. However, in other examples, the flange 362 and the flange 364 can be created as a whole as a whole, the capacity element or structure. Similarly, the housing 318 includes a second flange 368 for connecting the housing 318 flange 370 in the structure of the component bracket 372. However, in other examples, the second flange flange 368 and 370 can also be integrated as a single element or structure.

On FIGA-4C shows the image at various positions scenarios of the actuator 300, when the control actuator 304 is in working condition. In FIG. 4D presents a schematic representation of a variant of implementation of the actuator 300 in the case, when the control actuator 304 is in an unusable state. If you look at FIGA-4D, the Manager of the actuator 304 is in working condition in the case when the first brake chamber 310 through the channel 402 receives control fluid and/or when the second brake chamber 312 through the channel 404 receives control fluid for forcing the control of the Executive component 308 to move between the first position shown in FIGA, the intermediate position shown in FIGV, and a second position shown in FIGS. The length of the passage managing Executive component 308 between the position shown in FIGA, and the position shown in FIGS is the full length of the stroke of the control run is inogo mechanism 304. In other examples, the full length of the stroke of the control actuator 304 may be larger than eight inches (20.32 cm).

As noted above, the embodiment of the actuator 300 can be used in conjunction with a control device of a fluid medium, such as, for example, spool valves, rotary valves or any other suitable device or equipment to control the flow. For example, an embodiment of the actuator 300 can be used for work or run is taken as the analogue of the valve 104 from FIGA.

During operation, if you look at FIGO, 3A, 3B, and 4A-4D, the second brake chamber 312 through the channel 404 receives control fluid used to move the control of the Executive component 308 in the first position shown in FIGA. In the first position of the actuator stem 344 causes movement of the valve stem 345 and, as a consequence, the management component stream 116 (FIGA) in the first position (for example, in the "open"position) for the passage of the fluid flow through the valve 104 (FIGA). If you look at FIG. 4, to adjust the position management component 116 relative to the valve seat 108 (FIGA) to limit the flow of fluid through the valve 104, at least a part of the administration is allowing the fluid should be removed from the second brake chamber 312 through the second channel 404, this control fluid is supplied to the first brake chamber 310 through the first channel 402, so that the differential pressure control fluid between the first and second brake chambers 310 and 312 made Executive managing component 308 to move to the intermediate position shown in FIGV (i.e., the position between the first position shown in FIGA, and a second position shown in FIGS).

If you look at PIGS, the control fluid is removed from the second brake chamber 312 and enters the first brake chamber 310 so as to cause movement of the control actuating component 308 in the second position. In the second position of Executive managing mechanism 304 causes the motion of the component flow control 116 to the second position (for example, in the "closed"position to prevent flow of fluid through the valve 104.

As shown in the examples illustrated in FIGA-4C, during normal operation, the third brake chamber 322 through the third channel 406 continues to receive control fluid designed to hold corrective Executive component 320 in a fixed position when managing Executive component 308 is moved between the first position (FIGA) and second position (FIGS) (i.e., the hen, Executive managing mechanism 304 is in working condition). In the locked position adjustment Executive component 320 and the housing 334 is moved in the direction of the nest of springs 332 up until the housing 334 is in contact with the socket, the spring 332. In this way, the Jack spring 332 provides stop the passage of fluid to prevent damage to the bias element 328 due to excessive increase of the pressure of the fluid in the third brake chamber 322. In other words, the slot of the spring 332 prevents the compression of the bias element 328 in the direction of the nest of springs 332 (if you look at FIGA-4C) beyond the detent position shown in FIGA-4C.

When corrective Executive component 320 is in the locked position, the fastener 356 is moved between the first and second positions that correspond to the first and second positions corrective Executive component 308, and not in contact with the device for changing the feeding speed 302. Thus, the device for changing the feeding speed 302 are not exposed to contact or otherwise has a negative effect on the operation of the control actuator 304, when the latter is in working condition. In other words, managing the actuator 304 should not overcome the force of the spring bias e is ment 328 then when the control actuator 304 is in working condition.

In some examples, the control fluid coming for example from a source of supply control fluid may not be available or disabled, thereby causing the output of the control fluid (e.g., release or exhaust) of the first brake chamber 310, the second brake chamber 312 and the third brake chamber 322. In the Executive managing component 304 becomes unusable. Being in an unhealthy state, Executive managing component 304 will not be able to move for controlling the position of the component flow control 116, and as a result, the flow of fluid between the inlet 112 and outlet holes 114 of the valve 104 becomes unmanageable.

As shown in .4D, the device for changing the feeding speed 302 is activated in the case, when the control actuator 304 is in an inoperable state. By removal of the control fluid from the third brake chamber 322 corrective Executive component 320 is moved in a second, opposite the first direction (for example, in the direction of the third brake chamber 322, if you look at .4D). Remove the control fluid from the third brake chamber 322 makes it possible impacts is established on the first surface 326 corrective Executive component 320 to extend the bias element 328 and move with it, corrective Executive component 320 in the second or extended position as shown in .4D. As the length of the bias element 328 housing 334 slides along rods 336 together with corrective Executive component 320. As corrective Executive component 320 is moved in the second direction, a part of the recess 340 corrective Executive component 320 touches the protruding portion 360 of the fitting 356 for education in the operating mode connection corrective Executive component 320 with the managing Executive component 308. In turn, corrective Executive component 320 causes movement of the control actuating component 308 at a predetermined position shown in .4D. In the component flow control 116 also moves in a predetermined position (for example, in the "open"position). To return or move the device to change the speed of the feeder 302 in a fixed position, control fluid is supplied to the third brake chamber 322 (for example, when there is a restoration of supply control fluid), the effect of which causes the movement of corrective Executive component 320 in the direction of the spring socket 332 (i.e., in a fixed position).

In the example on FIGA-4D device to change when Oreste supply 302 options for performing the actuator 300 is arranged in a configuration without opening the case when forming the connection with the valve, such as valve 104 on FIGA. In other words, the embodiment of the actuator 300 (in case of connection to the valve 104) is configured so that, when in a predetermined position, this actuating device 300 causes the motion of the component flow control 116 away from the valve 108 to allow passage of the fluid flow through the valve 104. However, in other examples, the actuator 300 can be configured so that, when in a predetermined position, the actuator 300 has caused displacement of the control component 116 in the direction of the valve seat 108 to prevent the flow of fluid through the valve 104 and/or in any other suitable or desired intermediate position. Thus, in other examples of embodiment of the actuator 300 can be configured without the possibility of closure.

Configuration without the possibility of closure causes pressurized occurrence management component stream 116 in the valve seat 108 (e.g., the "closed"position to prevent flow of fluid through the valve 104. For example, FIVE-4H are illustrations of a variant implementation of the actuator 300, configured the AK system without the possibility of closure in case of connection to the valve, such as, for example, the valve 104 from FIGA. In this example, the device for changing the feeding speed 302 is oriented in the opposite direction (e.g., transposed) as to how it is shown on FIGA.

During normal operation of the fourth brake chamber 324 through the channel 408 receives control fluid designed to maintain corrective Executive component 320 in a fixed position then, when the control actuator 304 is in working condition. The fitting 356 is moved between the surface 410 of the housing 334 and the second surface 330 corrective Executive component 320 by moving the control actuator 304 between the first and second positions, shown in FIGE and 4G. When the control actuator 304 is inoperative, the control fluid is released from the fourth brake chamber 324 through the channel 408, causing it to move thereby correcting the Executive component 320 in the second direction to a fourth brake chamber 324 to a predefined position. For example, the fitting 356 contact with the surface 410 of the housing 334, when corrective Executive component 320 is moved in a predetermined position. In turn, aprico novena fasteners 356 and housing 334 results, Executive managing mechanism 304 in the movement toward a predetermined position, and, as a consequence, also called the move a component, the flow control 116 in a predetermined position to prevent flow of fluid through the valve 104.

On FIGA the drawing with a partial opening of the inner part of another version of the runtime of the actuator 500, described in this paper and containing a device for changing the feeding speed 502. On FIGU shows a cross section of a variant of implementation of the actuator 500 of FIGA. An embodiment of an actuating mechanism 500 provides a smaller profile or height than described here actuators 200 and 300, with the result that he takes up less space than embodiments of the described here actuators 200 and 300.

An embodiment of the actuator 500 includes a first housing 504 that is located within or inside of the second housing 506. The rod of the actuator 508 is connected (for example, using fasteners) to the Executive Manager component 510 (e.g., piston, membrane, etc.) of the first housing 504 and, sliding, forms a link with corrective Executive component 512 (e.g., piston, diaphragm, etc.) of the second housing 506. In this example, the corrective Executive component 512 contains a groove 514, intended for I is Yes there sliding stem actuator 508. Executive managing component 510 during operation causes the connection management component flow to the actuator stem 508 through the valve 516 to move between first and second positions or anywhere in between.

Executive managing component 510 determines the position of the first brake chamber 520 in which through the first channel 522 receives control fluid (e.g., compressed air, hydraulic fluid, etc. in order to displace the control of the Executive component 510 in the first direction, and the position of the second brake chamber 524, in which through the second channel 526 receives control fluid (e.g., compressed air, hydraulic fluid, etc. in order to displace the control of the Executive component 510 in the second, opposite the first direction. In this example, the first channel 522 and the second channel 526 are passages for the fluid (including, for example, pipes, hoses, etc.), forming a single unit within the flange 528 of the second housing 506. In the composition of the first channel 522 includes a tube or tubular element 530, designed for connecting the first channel 522 to the first brake chamber 520.

Corrective Executive component 512 is placed in the second housing 506 for definition wide-angle the position of the third brake chamber 532 and the fourth brake chamber 534. The third brake chamber 532 through the third channel 536 receives control fluid to move the corrective Executive component 512 in a fixed position. Corrective Executive component 512 is moved to a predetermined position when the control fluid is released from the third brake chamber 532 through the third channel 536, while managing Executive component 510 is in an unusable state. For clarity of presentation an integral part of the device to change the speed of the supply 502 is shown in FIGA and will be discussed below in connection with FIGV.

If we consider FIGV, the device for changing the feeding speed 502 contains a spring-loaded safety device or holding the sheath 540 connected to corrective Executive component 512, and slide in contact with the socket, the spring 542 using rods 544. Bias element 546 (e.g., spring) or is captured between the sheath 540 and socket spring 542 in order to cause movement of corrective Executive component 512 and shell 540 in a predetermined position when managing Executive component 510 is idle (for example, in the case of failure of the system for supplying control fluid under pressure, and, after the dance, fluid is removed from the third brake chamber 532. This configuration allows the device to change the speed of the supply 502 to prevent the output element 546 of the second housing 506, when the shell 540 is removed from the second housing 506 during maintenance or repair. Shell 540 and socket spring 542 is equipped with grooves 548 to log back in first block 504.

The actuator stem 508 contains the fitting 552 in its end portion 554 that must take corrective Executive component 512, when the latter is moved in a predetermined position as shown in FIGV. Connection piece 552 is equipped with or forms an annular protruding component or circular protrusion 556. Thus, the clutch fasteners 552 corrective Executive component 512 causes the displacement of the first actuating component 510 in a predetermined position. The connecting piece 552 may be holding fixture, clamp, etc. In other examples, the connection piece 552 and the actuator stem 508 form a single whole in the form of a solid element or structure.

During operation in the third brake chamber 532 through the third channel 536 receives control fluid to compel corrective Executive floor component is to control the fluid through the third channel 536, to cause movement of corrective Executive component 512 in a pre-fixed position (for example, in a situation where the bias element 546 is compressed in the direction of the nest of springs 542). In a pre-locked position adjustment Executive component 512 and the sheath 540 compress bias element 546 to until the surface 560 shell 540 is in contact with the socket, the spring 542. Remove the control fluid from the third brake chamber 532 weakens the force applied to the first side 562 corrective Executive component 512, resulting in a bias element 546 extends and acts on the second side 564 corrective Executive component 512 to move in a predetermined position. Shell 540 slides together with corrective Executive component 512 along the rods 544.

As you move the corrective Executive component 512 in a predetermined position that engages with the connecting piece 552 for education in the working mode of communication between corrective Executive component 512 and managing Executive component 510. In turn, corrective Executive component 512 causes movement of the control actuating component 510 in the third or predefined position is the it is shown in FIG. 5th Century To return or move the corrective Executive component 512 in a pre-locked position of the supplied control fluid in the third brake chamber 532, which causes the movement of corrective Executive component 512 in the direction of the socket spring 542.

Embodiments of the actuators 204, 304 and 504 are depicted as Executive piston double-action mechanisms. However, embodiments of the device for varying the speed of feed 202, 302 and 502 are not limited to use in conjunction with options for complete control actuators 204, 304, 504, and can be connected to a suitable for this actuator. For example, on FIGA and 6B shows another variant described here, the actuator 600. An embodiment of the actuator 600 includes an embodiment described here, the device for changing the feeding speed 602 connected to the Executive membrane dual-action mechanism 604. On FIGA shown embodiment of the device for changing the feeding speed 602, which is in pre-locked position when the Executive diaphragm mechanism 604 is in working condition. On FIGU shows a variant implementation of the device to change the feed speed 602, which is in a pre-locked position when the Executive diaphragm mechanism 604 is in an unusable state.

Embodiments of the devices described here to change the speed of the feed 202, 302, 502 and 602 may be manufactured in the factory or modified under the existing actuators (for example, the actuator 104), which are already used. For example, if we consider FIGA and 6B, the housing 606 of the device to change the feed speed 602 may be connected with the upper casing 608 Executive membrane mechanism 604 (for example, by means of fixing devices). The push rod 610 corrective Executive component 612 in the operating mode may be in contact with the managing Executive component 614 (e.g., plate membrane) through the slot or ventilation hole 616 in the upper casing 608, so that the coupling piece 618 push rod 610 in contact with the managing Executive component 614 by means of a spring 620 when the Executive diaphragm mechanism 604 is in a degraded state or position.

Alternatively or additionally, the actuators 200, 300, 500 and 600 can be configured for adjustable stop passing. And more specifically, the corrective IV is positive components 232, 320, 512, and 612 may be positioned so as to limit the length of the stroke or their respective governors Executive components 208, 308, 510, and 614. For example, if we refer to presents for FIGA, 3B, and 4A-4D variant of execution of the actuator 300, the Jack spring 332 can be changed to another slot in the spring 332, height or length which is longer than the same parameters for the nests shown in FIGA, 3B, and 4A-4D. Thus, the slot of the spring 332, height or length which is longer than the same parameters for the slots 332, as shown in FIGA, 3B and 4A-4D, is a cause of pre-fixing of the second actuating component 320 in an intermediate position between the pre-locked position FIGA-4C and a predetermined position on .4D (e.g., closer to the connecting part 356, if you look at FIGV). As a result of this adjustment, the Executive component 320 acts as a means of stopping the promotion, by limiting the movement of the fitting 356 as she moves between the position shown in FIGA, and the position shown in FIGV. As a result, for example, when the actuator 300 is connected to the valve 104 shown in FIGV, component 116 may not fit to enter into the valve seat 108. In other words, when correctitude the Executive component 320 is above the intermediate position, working stroke of the control actuator 304 is smaller than when corrective Executive component 320 is in a pre-locked position, shown in FIGA-4C.

Additionally or alternatively, in business applications, which are characterized by high speed and/or high loads, it may be advisable to install shock absorber (shock-absorbing effect, for example, can be created by installing a spring support at the end points of passage or spring driven hydraulic or pneumatic means) for the control of the Executive components 208, 308, 510 or 614 to prevent stroke of governors Executive components 208, 308, 510 or 614 on appropriate surfaces of the housings 210, 306, 506, or 608. Embodiments of the actuators 200, 300, 500 or 600 may preferably be configured to obtain a shock-absorbing effect and/or slow-motion effect to prevent noise and/or damage to the components of the embodiments of the Executive mechanisms 200, 300, 500, or 600.

And more specifically, corrective Executive components 232, 320, 512 or 612 may be positioned in an intermediate position, such that bias elements 240, 328, 546 620 or were not fully compressed when they are in the desktop mode is in contact with the control of the Executive components 208, 308, 510, or 614. This intermediate positioning causes the insertion of fasteners 252, 356, 552 or 618 in the operating mode to the appropriate Manager of the actuators 208, 308, 510 or 608 before passing the entire length of the stroke control actuators 208, 308, 510, or 608. As a result, for business applications, which are characterized by high speed and/or high loads, fasteners 252, 356, 552 or 618 cause compression of the respective bias elements 240, 328, 546 620 or corrective Executive components 232, 320, 512 or 612 to complete through the full length of the stroke.

Full length of the stroke, for example, shown in FIGA and 4C. The position of managing Executive component 308, shown in FIGA, and the position of managing Executive component 308, shown in FIGS is the full length of the stroke (for example, passing 100%) when the device for changing the feeding speed 302 is pre-locked position, shown in FIGA-4C (for example, the shell 334 is in contact with the socket, the spring 332). However, the device for changing the feeding speed 302 may be configured to move in an intermediate position located between the positions shown in FIGA and 4C. For example, in titution camera 322 may receive control fluid which exerts force or effect on correcting the Executive component 320 to cause its movement in an intermediate position between the pre-locked position FIGA-4C and a predetermined position on .4D so that the sheath 334 walked away from the nest spring 332 (e.g., formed gap) when corrective Executive component 320 is pre-fixed position (for example, when the control actuator 304 is in working condition). Such an intermediate position causes the contact of the control actuator 304 in the operating mode with corrective Executive component 320 at the point of the stroke, the distance of which is less than the full length of the stroke (for example, 98 percent of the length of the stroke). After that, the full length of the stroke can be achieved by compressing the bias element 328 on the additional length of the stroke (for example, 2 percent of the remaining length of the stroke) to move the control actuator 304 in the position shown in FIGS, to achieve the full length of the stroke.

Thus, by moving the control actuator 308 in the position shown in FIGS, circular h is Upaya part 360 is in contact with the corrective Executive component 320 at the point of the stroke, which is less than the full length of the stroke (for example, 98 percent of the length of the stroke). To complete the full stroke of the circular protruding portion 360 is in contact with the corrective Executive component 320 in order to force bias element 328 to produce compression in the remaining part of the length of the stroke (for example, for the remaining 2 percent path) as long as the shell 334 will not enter the slot of the spring 332. Compression bias element 328 in the remaining part of the length of the stroke in this way can reduce the speed of the first actuating component 308 at the end of its stroke. Also, for example, in applications that are characterized by high load, such positioning corrective Executive component 320 causes the absorption bias element 328 forces generated by the managing Executive component 308 (e.g., mechanical energy Manager Executive component 308 may be transferred bias element 328). In the bias element 328 provides the effect of slowing and/or absorption load of the control actuator 304.

An embodiment described here, the device changes the feed speed can be used in conjunction with actuators double acting, single mechanisms is Astia, equipped with spring return, and/or any other actuating mechanisms. Additionally or alternatively, the here described embodiment of the actuator can be used for operation or actuation Bolotnikova valves (e.g. gate valves, spherical valves, etc.), rotary valves (e.g. butterfly valves, ball valves, disk valves, etc.) and/or any other device or equipment to control the flow.

Although there are several embodiments of methods and devices, the claims of this patent is not limited. On the contrary, this patent covers all methods and devices and manufacturing products that are either literally or by equivalence principle clearly fall within the scope of the attached claims.

1. The system of the actuator for a valve, comprising:
implementing mechanism configured to move the first rod of the actuator, and the actuator includes a housing and Executive managing component located in the housing and coupled with the first actuator stem, while managing Executive component and the housing define the location of the first is tormoznoy camera and the second brake chamber; moreover, the first brake chamber receives control fluid causing movement of the control actuating component in the first direction and the second brake chamber receives control fluid causing movement of the control actuating component in the second, opposite the first direction; and
device for changing the speed of the feeder connected to the actuator, and a device for changing the speed of the feed contains
corrective Executive component and
the spring forming in the operating mode of communication with corrective Executive component to move through it the first actuator stem in a predetermined position when the condition occurs correction.

2. The system according to claim 1, characterized in that the actuator includes a pneumatic piston or a spring in the Executive membrane mechanism.

3. The system according to claim 1, characterized in that the spring is in a compressed state until the condition of correction, and the spring is stretched to move the corrective Executive component and the first actuator stem in a predetermined position when the condition occurs correction.

4. The system according to claim 1, characterized in that the corrective Executive the component does not affect the performance of the Executive component to the condition occurs correction.

5. The system according to claim 1, characterized in that it further comprises a second actuator stem connected with corrective Executive component, while the second actuator stem in the operating mode forms a communication with the first actuator stem to move the latter in a predetermined position.

6. The system according to claim 5, differing in that the first rod of the actuator and the second actuator stem in the operating mode disconnected until the condition of correction.

7. The system according to claim 6, characterized in that the second piston rod of the actuator is a push rod configured for contact with the managing Executive component to move the first actuator stem when conditions are correct.

8. The system according to claim 5, characterized in that the first rod of the actuator and the second actuator stem connected with narrow sleeves.

9. The system according to claim 5, characterized in that the second actuator stem is made with the possibility of sliding connection with corrective Executive component.

10. The system according to claim 1, characterized in that the spring and corrective Executive component configured for failover operation without transition in QCD is itoe position.

11. The system according to claim 1, characterized in that the spring and corrective Executive component configured for failover operation without switching to the closed position.

12. The system according to claim 1, characterized in that the predetermined position is adjusted by changing the magnitude of the force applied to the corrective Executive component.

13. The system of the actuator device to change the speed of the feed, consisting of:
actuator with Executive managing component located in the first housing for positioning the first and second brake chambers, and the first brake chamber receives control fluid causing movement of the control actuating component in the first direction and the second brake chamber receives control fluid causing movement of the control actuating component in the second, opposite the first direction, and the actuator is in working condition;
corrective Executive component located in the second device to change the feed speed for positioning the third and fourth brake chambers, third brake chamber receives control fluid, causing the AC is of corrective Executive component in the direction of previously recorded provisions moreover, the actuating mechanism is in working condition; and
bias element located in the fourth brake chamber and causing corrective Executive component of movement of the managing Executive of the component in the predetermined direction at the time of issue of the management of fluid from the third brake chamber, while the actuator is in an unusable state.

14. The system of item 13, characterized in that it further includes a rod connected to the control of the Executive component, and forming a movable connection with corrective Executive component.

15. System 14, characterized in that it further includes a narrow sleeve connected to the shaft for education in the working mode of communication with the managing Executive component and corrective Executive component when the actuator is inoperative, and corrective Executive component moves in a predetermined position.

16. The system of clause 15, wherein the narrow sleeve includes a flanged portion intended to contact with the managing Executive component or corrective Executive component when corrective Executive component moves in p is depredation direction.

17. The system of clause 15, wherein the rod comprises a first rod of the actuator and the second actuator stem, with a narrow sleeve forms a relationship with the first rod of the actuator and the second actuator stem.

18. The system of item 13, wherein the first housing is installed within the second housing.

19. The system of item 13, wherein the bias element includes a spring.

20. The system of item 13, characterized in that it further includes a sheath attached to corrective Executive component and forming a movable connection with the socket, spring, while the bias element is located between the shell and the socket springs.

21. The system of item 13, wherein the managing Executive component consists of a piston or membrane plate and corrective Executive component of the piston.

22. The system of item 13, wherein the device for changing the feed speed has no effect on the actuator, which is in working condition.



 

Same patents:

FIELD: machine building.

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EFFECT: providing remote control; improving reliability and safety of valve operation.

2 cl, 2 dwg

Valve // 2502911

FIELD: machine building.

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FIELD: machine building.

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14 cl, 2 dwg

FIELD: machine building.

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FIELD: machine building.

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14 cl, 2 dwg

FIELD: instrument making.

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12 cl, 2 dwg

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FIELD: valving.

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EFFECT: enhanced reliability.

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FIELD: pipe line fittings; pneumatically-driven valves mounted on tank trucks.

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EFFECT: simplified construction of valve.

4 cl, 2 dwg

Control valve // 2282772

FIELD: valving.

SUBSTANCE: control valve comprises housing provided with inlet and outlet passages and receives two valving gates connected with the rod having movable drive. The first valving gate is made of a rod with step piston having openings and sealing surface. The second valving gate is made of bushing-plunger that embraces the piston and is provided with sealing surface for permitting its axial movement and locking at the end positions. The second valving gate is mounted coaxially in the seat provided with the sealing surface and sealing member. The sealing member is tubular and provided with openings made downstream of the sealing member and sealing surface. The inner diameter of the tubular part of the seat downstream of the sealing surface is mating to the outer diameter of the second valving gate, which is mounted for permitting axial movement along the tubular part of the seat from the sealing surface by means of step piston. At the end position, the sealing surface of the step piston of the rod cooperates with the sealing member. The sealing surface of the step bushing-plunger cooperates with the sealing surface of the seat. The rod is provided with piston to define the under-piston space connected with the atmosphere and above-piston space connected with the inlet passage through a passage.

EFFECT: enhanced reliability.

1 dwg

Ball cock // 2285852

FIELD: valving.

SUBSTANCE: ball cock comprises housing that has inlet and outlet passages and receives valving member made of tubular piston mounted in the housing for permitting movement under the action of external pressure, sealing unit movably mounted with respect to the tubular piston, and passage that connects the butt between the sealing unit and tubular piston with the atmosphere. The valving member is mounted on two axles that are axially aligned and rigidly interconnected. One of the axles is connected with the driving mechanism through the pinion. The driving mechanism is made of rod that is set inside the housing out of the zone of the through passage and two bushings movably mounted on the rod. The bottom bushing-rack is mounted for permitting cooperation with the pinion. The top bushing-piston is mounted for permitting cooperation with the piston that is mounted above the top arrester of the bushing-rack and defines the hydraulic space together with the arrester. The space is filled with oil. The central section of the rod is provided with ring projection, and the openings in the bushings are step. The inlet and outlet passages are connected with the space above the top bushing-piston through the check valves.

EFFECT: enhanced reliability.

3 dwg

FIELD: instrument making.

SUBSTANCE: group of invention is related to combined devices for unloading and protection against hydraulic shock and is intended for pressure-loaded reservoirs with working fluid in systems of working fluid supply to hydrodynamic machines. Combined device (4) for unloading and protection against hydraulic shock comprises body (18), unloading valve (52), comprising inlet chamber (54) communicated with internal space (12) of reservoir (3) with working fluid, outlet chamber (55) communicated with its unloading space (13), valve body (56) installed with the possibility of displacement in body (18), valve seat (57) fixed in body (18), actuator (58) joined with valve body (56). Seat (57) is installed so that when interacting with body (56), it covers joint between inlet (54) and outlet (55) chambers. Device (53) for protection against hydraulic shock includes shock-resistant plate (37). Plate (37) is installed with the possibility of displacement outside body (18) on guide element fixed with body (56) of unloading valve (52). Guide element has thrust (41) on its end area inverted from body (56) for displacement of plate (37). Seat (42) is installed at the body (18). Seat (42), interacting with plate (37), locks inlet chamber (54). At least one throttling place (62) is installed between plate (37) and guide element. There is a system (2) for working fluid supply to hydrodynamic machines (1), including above mentioned combined device (4).

EFFECT: group of inventions is aimed at creation of more stable conditions in reservoir with working fluid in case of hydrodynamic machine emptying.

12 cl, 2 dwg

Valve // 2398151

FIELD: machine building.

SUBSTANCE: valve actuating hydro-cylinder (10) contains at least one slide. The slide shuts off flow channel inside the valve. Flow channel (48, 50) does not run through slide (40) of the valve. The valve contains a connection (R) of a reverse line continuously connected with slide (40) of the valve. Slide (40) of the valve on both sides is coupled with the connection of the reverse line. There is also disclosed procedure of installation section of a powered roof support by means of the said valve.

EFFECT: increased reliability of commutation with reduction of forces effecting valve seat.

14 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: locking-fixing device of turning gear consists of holder and spring, of piston pneumatic cylinder, outlet end of rod of which is connected to turning gear. In the rod of the pneumatic cylinder there is made an axial orifice wherein there are installed a spring and a holder with a piston. The holder has an axial orifice and a radial orifice connected to it for admission of compressed air. At the end part of the rod there is installed an eye with a through axial orifice and radial orifice coaxial to the holder and facilitating interaction of the eye with the holder. The rotating eye is installed in a support. An axle is arranged in the through axial orifice of the eye. The axle is stationary connected with the support and has an axial orifice wherein there is installed a connecting pipe for admission of compressed air. The rotating eye also has the radial orifice connected with the axial orifice and coaxial to the holder and a guiding groove facilitating interaction of the axle and the holder. Additionally, the eye is connected to the turning gear by means of a lever and a pressure plate.

EFFECT: expanded functionality of device.

2 dwg

FIELD: machine building.

SUBSTANCE: valve switching device contains hollow case whereto there are connected two lines of low pressure by means of branches and safety valves. Gas medium lines are connected to branches. A high pressure line is connected to a cavity of the case. A valve supplying pressure to one of safety valves and shutting off the second safety valve is installed in the cavity of the case on a movable rod. Cases of two pistons are arranged on end sides of the hollow case. One of the cases is split. The valve and both pistons are secured on a common rod passing through the hollow case and both cases of the pistons. A replaceable circular insertion is set in the split case of the piston. The piston in a chamber with the insertion is also split. Lines of control pressure are connected to each piston case on both sides of the piston. There are disclosed versions of design of valve switching device.

EFFECT: increased reliability of devices operation.

11 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: device consists of case forming chamber. A sliding rod dividing the chamber into the first and the second part is installed in the chamber. Each part of the chamber has a channel for supply of control fluid medium. The first part of the chamber has an orifice closed with a closing element secured in the case with fasteners containing: the first in essence circular groove made in a wall surrounding the orifice, the second in essence circular groove made in the closing element, a filament-like element forming a blocking element for the closing element and positioned between two in essence circular grooves.

EFFECT: increased reliability of device.

21 cl, 8 dwg

FIELD: machine building.

SUBSTANCE: pneumatic drive with a braking device comprises a cylinder, a braking chamber, a piston with a single-sided stem, a controlled throttle, and also a ledge, an inlet hole connecting a piston cavity with a source of gas, and an outlet hole connecting the stem cavity with atmosphere. The ledge is made as covering the stem and is installed on the cover at the side of the stem, besides, the inner diameter of the ledge is equal to the stem diameter, at the same time the ledge end is arranged at the distance equal to the stem travel χst., in the stem on its axis there is a dead hole, the outlet of which at the side of the end opposite to the piston is connected to atmosphere, and at the distance ℓ from the piston end facing the stem there is an inlet through hole, which is perpendicular to the axis of the dead hole, at the same time a pneumatic distributor installed at the inlet to the piston cavity is made in the form of an injection nozzle connected directly to a throttle of permanent cross section, and at the outlet of the stem cavity there is a controlled throttle installed on the outlet hole.

EFFECT: invention makes it possible to control speed of pneumatic cylinder piston movement along with the stem travel.

1 dwg

Pressure regulator // 2453723

FIELD: machine building.

SUBSTANCE: fluid pressure regulator comprises regulating chamber 9 and valve 26. Said regulating chamber 9 accommodated reciprocating piston18. The latter divides chamber 9 into first and second chambers 10, 11, respectively. The latter comprises first and second fluid inlets 12, 13 and outlets 14, 15, respectively. Inlets 12, 13 are communicated with first equipment 2 at first pressure (pin). Outlets 14, 15 are communicated with second equipment 23 at second pressure (pout). Piston 18 displaces in response to fluid pressure variation in first chamber 10 to open/close second outlet 15 to adjust second pressure (pout). Valve 26 serves to open/close first inlet 14 to vary pressure in first chamber 10.

EFFECT: adjustment of regulator outlet pressure.

14 cl, 2 dwg

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