Flow control valve
FIELD: machine building.
SUBSTANCE: valve comprises case having through channel and tap arranged at the angle to through channel. In through channel there is a throttle device, having throttle element actuated via tap, and two points of measurement to measure pressure in through channel along both sides of throttle device. Each point via channel of pressure measurement is connected to hole for measurement of pressure at least one pressure measurement channel passes through bend.
EFFECT: possibility to expand capabilities in part of flow control valve layout.
12 cl, 3 dwg
This invention relates to a valve for flow adjustment, the housing of which has a flow channel and an outlet located at an angle to the flow channel and the flow channel installed a throttle device with a throttling element which is driven through the outlet, and two measuring points for measuring the pressure in the flow channel on both sides of the throttle device, each of which is through the measuring channel is connected with a pipe for measuring pressure.
Such a valve is known, for example, from No. DE 19619125 C2. In this throttle valve is formed by a measuring sleeve which is installed before the actual throttle equipment. Channels for measuring pressure allotted on both sides of the sleeve to the side so that the holes for pressure measurement are located at the lateral surfaces of the valve body and located at an angle of about 45° to the bend and 90° to each other.
This valve is designed for hydraulic balancing of the hydraulic system, for example, water heating pump. This balancing can lead to the consumption of different parts of the fluid-filled system in accordance with certain specified values.
To do this, measure the pressure on both sides of the throttle. If the dimensions of the reactor is known, the pressure can be calculated consumption. Rashomon be changed by means of the throttle device.
We also know how the throttle device can be used as a controller. In this case also required a dial or other indicator that indicates the current value of the throttle device.
Regardless of this, you want to be able to measure the pressure on both sides of the throttle, however, and the pressure drop across the choke.
Valve to adjust the flow manipulating relatively rare, usually during the initial commissioning of the hydraulic system such or after rework of the hydraulic system. So at another time the valve is not disturbed, it is often installed in inaccessible places, such as under the floors or in the mines. However, because access to the valve is possible only with difficulty, adjustment of the flow Adjuster is difficult. Very often the problem is the installation of the sensors into the holes. In some cases, this requires significant work skill.
The present invention is to expand opportunities in the layout of the valve to adjust the flow.
With respect to the valve type named this problem is solved by removing at least one measurement channel through the outlet.
This gives more flexibility in the placement of holes for pressure measurement. Now no longer the South to place the measuring hole right near places where the measuring channel is connected with the flow channel. Moreover, the hole for the pressure measurement can also be placed in the area of the outlet, where it is more accessible to the technician. While the word "challenge" is something that departs from the valve body under the said angle to the flow channel. Allotment in whole or in part, you can perform the piece with the housing. As a diversion, you can use a separate part connected to the valve housing. Removal can also be performed from several parts, and the parts can be collected in a longitudinal and/or radial direction (relative to the exhaust), or also on the perimeter.
Preferably the outlet is placed the sleeve and the channel pressure is formed between the sleeve and the wall of the outlet, at least part of its length. Additional treatment of the exhaust, usually not needed, but a certain layout may require holes in the wall-of-way for transmission of pressure to the outside.
While it is preferable that a throttling element was attached to the sleeve. Thus, the sleeve serves two purposes, namely, first, it forms a channel pressure measurement, and secondly, is throttling element.
Preferably, the two holes for the pressure measurement is made in two parallel measuring pipes. This simplifies the the stop or the input pressure sensors, as to insert the sensors in the pipes, both sensors can be moved together. Therefore, the pressure sensors can be connected to each other mechanically, for example, to install them on a common holder, and thus the time required to install sensors, almost cut in half.
The angle between the measuring pipe and the casing is preferably from 20 to 70°. Due to this, the measuring tubes can be placed between the outlet and the housing, which in this district covers the flow channel. As the Adjuster in any case requires access to the allotment to trigger throttling element, we can assume that in this place is also available openings for measuring pressure, so that they could enter the measuring sensors.
Preferably, the measuring nozzles directed in the sinus between the bend and the longitudinal section of the valve body, covering the flow channel. Thus, the latch retains extremely compact external dimensions. All elements protruding from the valve body, are, so to speak, from one point. Due to this, also a slight risk that the measuring pipe can hold.
Preferably the outlet is between the two channels measuring pressure, at least part of their length. Thus, the challenge is also ináorder to separate two channel pressure measurement. Additional structural elements for this are not needed. This simplifies the design of the valve body.
Preferably, at least one hole for measuring the pressure placed into the mounting element, which is attached to the outlet with the possibility of rotation. Through this hole you can deploy concerning allocation and to bring it into position for easy positioning of the pressure sensor. This makes the work even more.
Mainly connecting element made in the form of covering the outlet nozzle. Thus, this nozzle forms a sort of cuff covering the drain in the form of a ring. The challenge, in turn, provides for the nozzle support with a possibility of rotation, so it's mechanically relatively sturdy construction.
Preferably between the nozzle and the casing is formed an annular channel. The annular channel is part of the channel pressure measurement. Annular channel bypasses fluid under pressure to the hole for measuring pressure, regardless of the angular position of the nozzle relative to the row.
Preferably between the nozzle and the valve housing in the region of the end face of the nozzle formed by the annular channel. In this case, the channel, i.e. the second annular channel, is part of the channel the pressure measurement to another hole. Then both channels can clearly be separated from each other, namely one channel to put on the end of the nozzle, and the second is in the area of its lateral wall. This simplifies the design.
Preferably the annular channel is limited to the outer wall of the exhaust. Thus, the second annular channel is in the sinus between the allotment and the rest of the valve body, so that these two elements form two walls of the annular channel. In this case, with the other sides of the annular channel protects itself nozzle.
Hereinafter the invention is described based on the preferred example of implementation, the description is accompanied by drawings. In the drawings shows the following:
figure 1 is a top view of the valve to adjust the flow;
figure 2 is a section along the line I-I in partial section along the line II-II of figure 1;
figure 3 is a section along the line I-I in partial section along the line III-III of figure 1.
The valve 1 to adjust the flow has a housing 2, through which passes a flow channel 3 with the inlet 4 and outlet 5. The flow direction can be reversed. Between the inlet 4 and outlet 5 set the throttle device 6 with a throttling element 8, which is mounted for movement along the axis 7. A throttling element 8 can be moved by means of the adjusting spindle 9, which for this purpose can ramati in detail not shown screw thread.
The housing 1 has an outlet 10, mounted approximately at right angles to the longitudinal section 11, and the longitudinal portion 11 is parallel to the flow channel 3. First, the outlet 10 is designed to serve as a support for throttling element 8. For this throttling element 8 is placed in the sleeve 12, is inserted into the outlet 10. The sleeve 12 is sealed relative to the outlet 10 so that the channel 3 to the outside cannot penetrate no liquid.
The throttle device 6 via a throttling element 8 forms section 13 of the thread, which you can modify to set the flow rate through the valve 1. To this flow rate could be controlled on both sides of the throttle device 6 is provided on one point 14, 15 of the measurement. In both points 14, 15 can measure the pressure that is present in this place of the flow channel 3. The measured pressure drop and the information about the size of the section 13 of the flow can be calculated consumption.
To pass out to measure the pressure from both points 14, 15, there are two holes 16, 17, each of which is arranged in the measuring pipe 18, 19. Both the measuring tube 18, 19 are an integral part of the coupling element, which is made in the form of the nozzle 20 and is mounted for rotation on the outlet 10. Between the nozzle 20 and the casing 10, there are two seals 21, 22. Another is Platania is located between the nozzle 20 and the longitudinal portion 11 of the housing 2.
The measuring point 14 through the opening 24 in the housing 2 is connected with the annular channel 25, a restricted nozzle 20, the casing 2 and the casing 10. Hole 16 for measuring the pressure connected with the annular channel 25, irrespective of the angular position of the nozzle 20 relative to the outlet 10.
Another point 15 measurement through channel 26 running parallel to the axis 7, is connected with the annular channel 27, which is connected with another hole 17 for measuring pressure. By the way, which is not shown in detail, the outlet 10 also can be made of several parts, at least in the area of the channel 26, and the first item is still connected to the housing 2 or even forms a single whole, and the second item is inserted in the first part or covers the first item.
The channel 26 is formed between the sleeve 12 and the casing 10. In this example implementation, the outlet 10 is made of several parts, namely part 28, which is an integral part of the housing 2 and serves him right angle, and the part 29, which is connected with the part 28 in a known manner.
The channel 26 is also designed as an annular channel encompassing the sleeve 12. Since the channel 26 is located within the outlet 10, here the seal to the outside is not necessary. On the contrary, the annular channel 27 is sealed by two seals 21, 22.
As follows from figure 1, two measuring tube 18, 19 are mounted parallel to each other is se. Accordingly, two openings 16, 17 for measuring pressure are also parallel to each other. They are closed by caps 30, 31. To measure only need to remove both caps 30, 31. Then the technician can in one motion to insert into the holes 16, 17 are not shown, the measuring sensors are mounted on a common holder, which is also not shown. So, you only need one operation, which greatly facilitates the work of the contractor, in particular, if the valve is installed in hard to reach places.
If you insert the pressure sensors in the holes 16, 17 in a position impossible, then the nozzle 20 on the outlet 10 can be deployed in order to find a more comfortable position for input sensors into the holes 16, 17.
Two measuring tube 18, 19 divide the angle between the drain 10 and the longitudinal portion 11 of the housing 2 approximately in half. Of course, the angle at which are located the measuring tubes 18, 19, not necessarily is exactly 45°. He can lie in the range 20-70°. Preferably both of the measuring pipe 18, 19 are directed to the sinus, formed between the longitudinal portion 11 of the housing 2 and the casing 10.
A throttling element 8 is included in the channel 30 with the ball body 31. Ball body 31 can be rotated around the axis 7, to completely close the flow channel 3. Thanks to this site system on which regulates the flow, you can also overlap, for example,for maintenance.
Ball body 31 is fixed ring 32, which at its cylindrical wall has openings 33, through which pressure builds to the point 14 of the measurement.
If you want to work with a fixed flow orifice, it can be placed in the annular insert 32. In this case, the ring insert 32 in front of the flow aperture and after it in the direction of flow is provided by holes 33, connected either with the point 14 of the measurement, either with point 15 of measurement.
1. Valve (1) to adjust the flow, comprising a housing (2)having a flow channel (3) and outlet (10), located at an angle to the flow channel (3), and in the flow channel (3) set the throttle device (6)having a throttling element (8)which is driven through the outlet (10)and has two points (14, 15) measurement for measuring the pressure in the flow channel (3) on both sides of the inductor, each of which is through the channel (26, 27) measuring the pressure connected with a hole (17) for measuring pressure, characterized in that at least one channel (26) measuring pressure passes through the outlet (10).
2. The valve according to claim 1, characterized in that the outlet (10) is a sleeve (12)and the channel (26) of the measuring pressure is formed between the sleeve (12) and the wall of the outlet, at least part of its length.
3. The valve according to claim 2, characterized in that the throttling element (8) shall provide for the sleeve (12).
4. Valve according to any one of claims 1 to 3, characterized in that the two openings (16, 17) for measuring the pressure made in the measuring nozzles (18, 19), and the measuring tubes (18, 19) parallel to each other.
5. The valve according to claim 4, characterized in that the angle between the measuring nozzles (18, 19) and outlet (10) is from 20 to 70°.
6. The valve according to claim 4, characterized in that the measuring tubes (18, 19) is directed in the sinus between the outlet (10) and longitudinal section (11) of the housing (2) valves, covering the flow channel (3).
7. Valve according to any one of claims 1 to 3, characterized in that the outlet (10) is located between the channels (23, 25; 26) measurement of pressure, at least part of their length.
8. Valve according to any one of claims 1 to 3, characterized in that at least one hole (16, 17) for measuring the pressure made in the connecting element attached to the outlet (10) for rotation.
9. The gate valve of claim 8, wherein the connecting element is designed in the form of a nozzle (20)covering the outlet (10).
10. The valve according to claim 9, characterized in that between the nozzle (20) and the casing (10) has an annular channel (27).
11. Valve according to any one of PP and 10, characterized in that between the nozzle (20) and the housing (2) in the area of the end face of the nozzle (20) is formed by the annular channel (25).
12. The valve according to claim 11, characterized in that the annular channel (25) is limited to the outer stink the th-of-way.
FIELD: machine building.
SUBSTANCE: ball transducer consists of removable unit including circular chamber, flow swirler, rod-displacer, ball and additional restriction. Further, the ball transducer consists of a permanent unit including a case with a cover and with an inlet and outlet branches, also of a signal recording unit positioned on the cover.
EFFECT: reduced diametre of ball motion orbit and thereby reduced speed of ball motion diminishing contact force effecting ball; also reduced length of ball run for service life which increases operation life of removable unit.
5 cl, 6 dwg
FIELD: machine building.
SUBSTANCE: invention can be implemented for testing multi-purpose accessories (MPA) of main (M). The essence of the invention is as follows: a draining tube (DT) is connected to inter-cock cavity of the ball cock and to pipelines of high and low pressure (HPP and LPP) via pulse tubes of high and low pressure (HPPT and LPPT). An electro-magnet valves (EMV) are installed in the HPPT and LPPT, while a reverse flow metre is installed in the DT. The reverse flow metre and outlets of pulse tubes are communicated with atmosphere via a pneumatic crosspiece. Controlled inputs of the EMV are coupled to the output of the server via an analogue-digital converter. The output of the flow metre is connected to the input of the server via the analogue-digital converter. The system facilitates measuring gas leaks through the first and the second sealing down gas stream at the ball cock of the MPA by means of the reverse flow metre under the automatic mode.
EFFECT: upgraded accuracy of measurements of gas leaks and automation of measuring process.
5 cl, 3 dwg
FIELD: machine building.
SUBSTANCE: flow control valve (1) with vessel (2). In flow channel (3) of vessel (2) there is throttling device (6) installed with throttling element (7), controlled from the outside with the help of handle, and digital indicator, which indicates position of throttling element. Indicator comprises at least three positions (24-26, 29) for reading of data, which face different directions, and their readings are identical.
EFFECT: simplified adjustment of flow control valve.
11 cl, 6 dwg
SUBSTANCE: indicator of locking element position of pipeline valves comprises part, for instance cover, scale with helical cut or slot, which is rigidly fixed by control flywheel, and indicating element. The latter moves in helical cut or slot of scale. Scale is arranged as either flat or inclined, and is installed over response fixed element. Slot is provided in this fixed element, where indicating stepped element moves.
EFFECT: creation of small position indicator for locking element, also for pipeline valves with fixed spindle.
2 cl, 5 dwg
FIELD: machine building.
SUBSTANCE: group of inventions is provided for definition of valve condition, used in systems for preparation of foodstuff, beverage foods and drugs. Valve assembly contains valve (1), drive (2) and sensor (3) of drain. Casing (4) of valve contains the first and the second chambers (6, 8) of valve, connected to corresponding branches (10 and 12, 14 and 16) of valve. Chambers are connected by means of transition channel (18). Drive can install valve into one of three possible conditions. In the first "open" condition transition channel is open and the first and the second chambers of valve are communicated through transition channel. In the second "closed" condition transition channel is closed by the first and the second sealing (24, 26), which are located in corresponding areas of channel and it is sealed space between the first and the second chamber of valve and it is sealed the first chamber (28) against leakage in area which is a part of transition channel between two sealings. In the third condition of "cleaning" one of sealing is not located in working position which is for connection, correspondingly, either the first, or the second chamber of valve with the first chamber of leakage. The rest sealing is in working position. Flow-sensing element is connected to the first chamber of leakage for the purpose of generation of signal which indicates presence of leakage from the first leakage chamber. It is a method of condition monitoring of manageable above valve.
EFFECT: improvement of valve operation reliability.
16 cl, 2 dwg
FIELD: machine building.
SUBSTANCE: invention is related to the field of machine building and is intended for use as drive for pipeline stop and control valves. Manual drive of pipeline with indicator of stop valve position comprises body. Gear drive is installed in body. Master pinion of gear drive is connected to flywheel. Slave pinion is installed on tubular hub with cam end and lantern. Lantern interacts with pinion. Pinion is fixed on screw. Screw moves nut. Travel indicator is fixed on nut. Cartridge is installed on cover parallel to sleeve for spindle and is closed with transparent jacket. In cartridge there are two longitudinal slots arranged. Radial ledges of nut move in slots. Nut ledges are connected to circular indicator that embraces cartridge. Indicator has windows for reading of marking. Marking is applied onto external surface of cartridge.
EFFECT: increased viewing angle of stop element position indicator.
2 cl, 4 dwg
FIELD: machine building.
SUBSTANCE: invention refers to machine building and is designed for implementation as drive in pipeline shut-off-adjusting accessories. The manual drive of pipeline accessories with indicator of position of the shut-off element consists of a case. A tooth gear is installed in the case. A flywheel is arranged on a drive pinion of the tooth gear. A driven gear of the tooth gear is coaxially secured on a hollow output shaft. One end of the output shaft contains a cam clutch. An opposite end of the shaft interacts with a recess of a cover. A cartridge wherein a telescopic part of a spindle is arranged and an additional cartridge with a recess for placement of a run indicator are assembled on the cover. The run indicator travels along graduated surface of the recess. Also the run indicator is connected with a nut. The latter interacts with a screw. The screw is coaxially fixed in the cartridge and is designed to rotate. A replaceable tooth wheel is installed on the lower end of the screw. The tooth wheel meshes a pinwheel. The pinwheel is coaxially mounted on the output shaft.
EFFECT: expanded implementation of manual drive for various dimension types of pipeline accessories.
3 cl, 5 dwg
FIELD: machine building.
SUBSTANCE: invention relates to machine building, particularly to production of control valves and accessories. Pipeline control valve state indicator comprises casing with slot for control valve state indicator finger to move along. Aforesaid casing is fastened at the post that doubles as cover. Aforesaid finger is arranged on the nut that travels along the screw. The latter is coupled with the sprocket interacting with fingers fitted on runner that controls the spindle. Aforesaid screw and sprocket are replaceable.
EFFECT: compact indicator for large-diametre control valves.
2 cl, 4 dwg
FIELD: engines and pumps transport.
SUBSTANCE: ball valve comprises a body with a seat and sealing elements, a rotary ball plug with a cylindrical throat, a stem and a stem seal, the stem, its one end being screwed in the ball plug, and the stem seal being made as a rotary motion screw-in sub locked in the valve body by means of a clamping element and a screwed nut and made up of three inter-ground ceramic washers. Two of the one-side ground washers are arranged fixed relative to the valve body. The third (central) movable ceramic is rigidly fixed on the separable stem, the said stem being separated into two parts by screwing it out through the seal. The seals are arranged in the movable washer recesses. The stem has, at least, one through bore designed to communicate the ball plug throat with the measuring instrument.
EFFECT: higher reliability, longer life and expanded performances.
7 cl, 5 dwg
SUBSTANCE: valve travel indicator comprises indicating part (34) and retaining part. Indicating part (34) points the position on the valve indicator scale (36). The retaining part is press-fitted on the valve stem to make a fixed joint between the indicating part and moving valve stem (26). The retaining part ensures a moving joint between indicating part (34) and valve stem (26), given the preset force applied to indicating part (34). There are a design of the aforesaid valve and a method of moving the valve travel indicator along the valve stem. The said method consists in retaining the said indicator, swinging it relative to the valve stem and moving the swinging indicator along the valve stem.
EFFECT: manual handling of the indicator with no additional appliances.
6 cl, 6 dwg
SUBSTANCE: electromagnet valve comprises housing with inlet and outlet branch pipes, electromagnet, armature with the valving member made for permitting cooperation with the electromagnet, and indication device for indicating the position of the valving member, e.g. magnetically controlled contact. The magnetic core is detachable. The stack and magnetic core adjacent to it are provided with opening that receives device for indicating the position of the valving member for permitting movement along the axis of the opening.
EFFECT: expanded functional capabilities and simplified structure.
SUBSTANCE: device comprises axially aligned housing with axial opening, rotating part connected with the shaft, locator for locking it at the initial position, unit for preventing device against rotation, and indication members mounted inside the housing. The top section of the housing is provided with horizontal groove that is in communication with its axial opening. The indication members made of inertia members spring-loaded perpendicular to the longitudinal axis of the housing are set in the horizontal groove. The rotatable part is made of piston with rod. The piston is sharpened and can move inside the axial opening in the housing. From the side of the housing base, the surface of the axial opening of the housing is provided with the cylindrical projection. The piston of the part to be rotated is spring-loaded with respect to the projection. The locator for locking the initial position of the part is made of additional projection made on the surface of the axial opening in the housing and groove on the outer side of the piston made for permitting the piston to move in the direction of horizontal groove in the housing after the rotation of the shaft. The length of the part to be rotated is chosen to provide locking the end position of the inertia members by the sharpened end of the piston after the rotation of the shaft. The top face surface of the housing is provided with horizontal groove that is in communication with the horizontal grove in the housing.
EFFECT: enhanced precision.
FIELD: heat power engineering.
SUBSTANCE: steam trap arrangement comprises steam trap that has inlet passage, outlet passage, and float, control measuring unit secured to the steam trap and provided with the central processor connected with the gage for measuring pressure in the inlet passage, gage for measuring pressure in the outlet passage temperature transducer, and pickup for measuring displacements of the plug. The inlet passage and the outlet passage are separated with an opening. The steam trap has a plug connected with the float. The central processor receives the output signals from the outlet passage pressure gage, inlet passage pressure gage, temperature transducer, and pickup for measuring displacements of the plug.
EFFECT: enhanced efficiency.
20 cl, 3 dwg
FIELD: valving systems.
SUBSTANCE: hose valve gate comprises housing sealed with respect to the outer space by flowing section, flexible hose, and mechanism for pinching the hose. The housing has through opening that connects the flowing section with the outer space. The device for visual control is mounted in the opening and has a piston that is sensitive to the pressure rise inside the flowing section of the housing and converts the pressure rise into the forward motion of the piston toward the outer space of the visual indicator connected with it.
EFFECT: enhanced reliability.
FIELD: engineering of armature for measuring, controlling, cleaning and stabilizing pressure for liquid supply systems, possible use, in particular, for supplying water in domestic buildings, cottages, and other consumers in any industrial branch involving supplying of a liquid component.
SUBSTANCE: measuring, monitoring and cleaning device for liquid feeding systems contains body, locking element, pressure regulator, liquid meter. Device additionally includes filtration and washing device. Locking element, pressure regulator, liquid meter and filtration and washing device are assembled in single case. Locking element is positioned in liquid inlet connection. Pressure regulator is positioned between liquid inlet and liquid outlet connections, and detachably connected to the case. By means of detachable connection, filtration and washing device is mounted in the case. This device is connected by a collector to pressure regulator hollow and the hollow after the locking element. A filter is mounted at the inlet of pressure regulator hollow. Liquid meter is mounted in the body by means of detachable connection. Outlet hollow of liquid meter is connected to liquid outlet connection. Its inlet hollow by means of another collector is connected to the pressure regulator hollow.
EFFECT: minimized dimensions of device due to combination of locking armature and filtering means in one unit, stabilization of pressure, recording of water (liquid) consumption, possible replacement of devices and elements of armature without disassembly of the whole device and without disabling the liquid feeding system and without requirements for its flush, measuring and monitoring elements are protected from dirt in working mode and during maintenance operations (washing).
2 cl, 2 dwg
FIELD: valving systems.
SUBSTANCE: valve comprises housing. The passage made in the housing between its sloping outlet and inlet passages receives the seat. The seat cooperates with the tip of the rod. The rod is sealed with respect to the housing and is controlled through the threaded bushing provided with the flywheel. The stroke indicator is mounted at the end of the rod opposite to the tip. The flywheel is connected with the threaded bushing by means of the stroke arrester. The indicator of position of the valving member passes through the arrester.
EFFECT: enhanced reliability.
FIELD: pipeline fitting, namely used as electromagnetic valve whose drive is controlled by means of short-period electric pulse.
SUBSTANCE: electromagnetic valve includes housing, connected to armature shut-off member, electromagnet, stop, permanent magnet and sealing tube. Permanent magnet is arranged in turning formed in stop. Depth of said turning is equal to sum of permanent magnet thickness and value of armature stroke. Armature has step reciprocal to turning. Value of said step is equal to value of armature stroke.
EFFECT: lowered power of electromagnet at providing target pulling effort in working gap.
3 cl, 4 dwg
FIELD: chemical and petrochemical industries.
SUBSTANCE: invention is designed for control devices of electric drives of valves, cocks, gates in transportation of oil and oil products. Proposed valve electric drive control device has optomechanical position sender and contactless voltage switch. Torque unit is made for calculating torque on shaft of induction motor as function of stator current of induction motor in electric drive, rotor speed, and current frequency, with possibility of calculating torque at output of electric drive transfer mechanism according to relationship M=Kt x Mim where M is torque at output of electric drive transfer mechanism, Kt = α x Kr, Kt is torque gain factor, α is correction factor taking into account state of electric drive and type of transmission, Kr is transfer ratio of transfer mechanism, Mim is torque on shaft of induction motor, with possibility of setting maximum torque at output of electric drive transfer mechanism. Rotor speed of induction motor for torque unit is found by readings of optomechanical position sender.
EFFECT: simplified design, reduced overall dimensions, increased reliability.
FIELD: mechanical engineering.
SUBSTANCE: group of invention relating mainly to valves, particularly, to valve travel indicators is designed to detect opening and closing or partial opening of valve. Valve travel indicator has indicating section 34 and holding section. Indicating section 34 shows position of valve indicator on scale 36. Holding section is stationary connected with indicating section 34 and is movable connected with valve rod 26. Holding section stationary connects indicating section 34 with valve rod 26 when valve rod is displaced and movably connects indicating section 34 with valve rod 26 to shift valve longitudinally along rod 26 in response to preset pressure applied to indicating section 34. Invention contains description of design versions of valve travel indicator and method of provision of safe operation of valve unit. According to proposed method, valve unit is furnished with valve travel indicator.
EFFECT: possibility of manual handling of valve travel indicator on valve rod without additional tools or devices.
5 cl, 5 dwg
FIELD: mechanic engineering.
SUBSTANCE: invention is related to valve manufacture industry and valves with rolling orifices, in particular. It is designed to control liquid flow rate. Orifice control valve consists of a body with inlet and outlet connections and valve seat. It is situated between inlet and outlet connections. Cutoff member enclosure is projected from valve body between inlet and outlet connections. Partially, section of internal cutoff member enclosure volume makes up control chamber. Cutoff member can be displaced. Its part is installed inside body to enable cutoff member displacement between open or closed positions of the valve. Elastic orifice is connected leak tight to cutoff member and makes leak proof control chamber with regard to part of inlet connection. This orifice has S-shaped cross-section and is made so that cutoff member displacement value inside body at each side is about 20% of outer orifice diameter with regard to central plane of connection between orifice and cutoff member body. Common value of cutoff member displacement inside its body is, at least 40% of outer orifice diameter. Cutoff member can be smoothly displaced in longitudinal direction inside cutoff member body. To direct cutoff member movement, at least one side body surface is provided with a large number of longitudinal vanes. There is design option of orifice control valve manufacture.
EFFECT: simplification of valve design; high liquid flow rate under minimum hydraulic losses.
19 cl, 13 dwg