Pneumatic reduction valve

FIELD: pneumatics and automatics, namely reducing and sustaining predetermined level of pressure of compressed gas in pneumatic drives of transporting and other machines, in tanks of fuel system of automobile transport at pumping fuel.

SUBSTANCE: reduction pneumatic valve includes housing with inlet and outlet ducts, calibrated orifice in inlet duct preventing increase of output pressure; spring-loaded stepped throttling valve; membrane type control unit having seat rigidly secured to membrane and elastic sealing member for minimizing change of effective surface area of membrane due to its minimum bending; valve member in the form of spherical head for reducing sealing effort, compensating membrane shift and providing intensified discharge of compressed air; filter placed at inlet of orifice for preventing clogging.

EFFECT: enhanced operational reliability, prevention of outlet pressure exceeding predetermined value, effective relief of compressed air, lowered sealing effort due to compensation of membrane shift.

3 cl, 3 dwg

 

The invention relates to pneumatic systems, and is intended to reduce and maintain at a given pressure level of the compressed air in the pneumatic transport and other vehicles and tanks in the fuel systems of motor vehicles with fuel transfer.

Known valve for pressure adjustment spring-loaded and has a mechanism to compensate for the displacement of the membrane under the influence of a spring (see U.S. Pat. U.S. No. 5255711, etc. 28.08.92, MKI6: G 05 D 16/02), which is a mechanism to control the pressure of the fluid containing the membrane, one surface of which is exposed to the pressure which is required to regulate the spring, providing a counter-membrane pressure, and the compensation device that changes the effective diameter of the membrane in a particular case, depending on its position on the longitudinal axis, allowing the pressure acting on the membrane is balanced by elastic force of the spring. The movement of the diaphragm actuates a valve that regulates the pressure in the channel between the membrane and the source of high pressure fluid. Bistable device shifts the valve to the open position when the pressure in the closed position with increasing pressure.

The disadvantage of this valve design is the complexity of the device, which compensates for the offset member the us.

The closest technical solution of the invention is a pressure REDUCING VALVE (see U.S. Pat. Japan No. 4-45849, MKI6: G 05 D 16/06, etc. 11.09.87), taken as a prototype. In common with the prototype features are: housing with input and output channels, the outlet, the valve seat interacting with the saddle spring loaded valve, the membrane with a load spring.

Known pressure reducing valve has a complex structure, low adaptability execution and allows the possibility of increasing the output pressure in excess of the specified value. These shortcomings identified by the presence in the body spring-loaded movable elements, in particular the valve seat, which contribute a large deflection of the membrane, which leads to large changes in effective surface area and, consequently, to large fluctuations in outlet pressure. As well as performing design of a spring-loaded throttle valve does not provide compensation for the displacement of the membrane.

The basis of the invention tasked with developing the design of the pressure relief valve which provides reliability, preventing the possibility of increasing the output pressure specified above, the efficiency of discharge of compressed air, reducing the efforts of the seal by providing a compensating displacement of the membrane, i.e. minimizing the change of the effective area of the membrane is wound due to its minimal deflection, providing a constant output pressure, preventing clogging of the input calibrated holes.

The task is solved by the fact that in the reducing valve in the input channel made a calibrated orifice and between the diameter of the calibrated orifice at the inlet and the bore diameter of the relief valve uses the following relationship:

3 dcodox,

where 3 dco- the diameter of an orifice inlet;

doxthe diameter of the hole of the relief valve,

the valve element is spring-loaded valve is made in the form of a spherical head, the seat of the relief valve communicating with the valve element spring-loaded throttle valve, manufactured stepped performed rigidly fixed with membrane diaphragm control node and an elastic sealing element, at the input of the input calibrated orifice filter is installed.

Between the set of features of the invention and the technical result is achieved, there is the following causal relationship: performing in the input channel, an orifice ensures reliable operation and prevents the possibility of increasing the output pressure is higher than the set, made in the form of a spherical valve head element contributes to a more EF the objective discharge of compressed air and reduces sealing force to ensure the compensation of the displacement of the membrane, rigidly fixed to the membrane valve seat relief provides constant outlet pressure due to minimal deflection of the membrane, i.e. minimizing the change of the effective area of a diaphragm, and installed at the entrance of an orifice filter prevents clogging of this hole.

The invention claimed is illustrated in the drawing.

In figure 1 a, b, C shows the pressure reducing valve in longitudinal section; figure 2 - view And projection from above; figure 3 is a view In broken section.

Pneumatic valve pressure reducing consists of a casing 1, input 2 and output 3 channels, filter 4 located at the front entrance calibrated orifice 5, the throttle speed of the valve 6, spring-loaded 7 rigidly connected by a rod 8 with the valve element 9 in the form of the spherical head of the saddle, made rigidly fixed with elastic sealing element 10 secured by a washer 11, the diaphragm 12 membrane control node is installed between the housing 1 and the glass 13 with fixed relief valve 14, the load of the spring 15, rests on the plate 16 of the Cup 13, the holes 17 of the relief valve 14, the nut 18, pressing hard centre 19 with the membrane 12 to the clamp relief valve 14.

The pressure reducing valve is as follows.

Compressed air is fed into the input Kahn is l 2, passes through the filter 4 and a calibrated orifice 5 and supplied to podpruzhinennom throttle speed valve 6.

Under the action of a loading spring 15 and the membrane 12 membrane control node caves in the side of a spring-loaded throttle speed valve 6 and separates it from the elastic sealing element 10, forming a gap between the spring loaded throttle speed valve 6 and an elastic sealing element 10, which allows the compressed air to get in podobrannyy cavity and to balance the membrane 12 membrane control node, resulting in a spring-loaded throttle valve 6 by a spring 7 abuts against the elastic sealing element 10 and blocks further flow of compressed air in podobrannyy cavity and to output channel 3. In other words, under the action of a loading spring 15 on the membrane 12 membrane control node, the compressed air from the inlet 2 through the throttle valve 6 is served in podobrannyy cavity and to output channel 3.

When the air flow pressure drops in podobrannoj cavity, and a diaphragm membrane 12 of the management node under the action of a loading spring 15, rests on the plate 16 of the Cup 13, sags toward the spring-loaded throttle speed valve 6 and the valve element 9 in the form of sferica the coy head, separates it from the elastic sealing element 10, is rigidly fixed to the saddle, and provides the compressed air in podobrannyy cavity and exits the valve, thus maintaining a constant pressure at the exit.

If the pressure at the outlet 3 above the set pressure, the diaphragm membrane 12 control node bending in the direction of the spring 15 and an opening 17 in the relief valve 14, providing an excess of air pressure in the atmosphere.

Application of the proposed solution allows to simplify the design, to improve the manufacturability and reliability of the product, to prevent the possibility of increasing the output pressure is greater than the specified due to the performance in the entrance channel calibrated holes, to provide a more effective discharge of compressed air and to reduce the sealing force to ensure the compensation of the displacement of the membrane through the implementation of a throttle valve speed, and valve element in the form of a spherical head, to provide a constant output pressure due to the rigidly fixed to the membrane valve seat, and to avoid clogging of the input calibrated holes by setting the input filter.

1. Pneumatic valve pressure reducing, comprising a housing located therein inlet and outlet channels through pregenency throttle valve, membrane managing node with load spring, relief valve with the vent hole of the output pressure in the atmosphere, characterized in that the input channel casing provided with a calibrated orifice, a spring-loaded throttle valve with the saddle, made rigidly fixed with an elastic sealing element, rigidly connected by a rod with the valve element in the form of a spherical head, which interacts with the valve seat of the discharge made rigidly fixed with membrane diaphragm control node, and between the diameter of the calibrated orifice at the inlet and the bore diameter of the relief valve uses the following relationship;

3 dco≤ dox,

where 3 dco- the diameter of an orifice inlet;

doxthe diameter of the hole of the relief valve.

2. Pneumatic valve pressure reducer according to claim 1, characterized in that the spring-loaded throttle valve is made staggered.

3. Pneumatic valve pressure reducer according to claim 1, characterized in that the calibrated orifice at the inlet is equipped with a filter.



 

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FIELD: pneumatics and automatics, namely reducing and sustaining predetermined level of pressure of compressed gas in pneumatic drives of transporting and other machines, in tanks of fuel system of automobile transport at pumping fuel.

SUBSTANCE: reduction pneumatic valve includes housing with inlet and outlet ducts, calibrated orifice in inlet duct preventing increase of output pressure; spring-loaded stepped throttling valve; membrane type control unit having seat rigidly secured to membrane and elastic sealing member for minimizing change of effective surface area of membrane due to its minimum bending; valve member in the form of spherical head for reducing sealing effort, compensating membrane shift and providing intensified discharge of compressed air; filter placed at inlet of orifice for preventing clogging.

EFFECT: enhanced operational reliability, prevention of outlet pressure exceeding predetermined value, effective relief of compressed air, lowered sealing effort due to compensation of membrane shift.

3 cl, 3 dwg

FIELD: measuring equipment.

SUBSTANCE: device has thermocouple 1 with seam 2, fixedly packed in tubular case 3 with longitudinal groove 4. tubular case 3 on thread enters screw holder 5, which by its outer screw profile is screwed into coils of set-point spring 6, fixedly held on heating element 7. Outwardly bent end 8 of spring 6 is inserted into longitudinal groove 4 of tubular case 3. spring 6 is provided with sensor 9 for axial displacement of spring and sensor 10 for dynamic pressure force. Rotation of screw holder 5 shall be performed until seam 2 stops against heating element 7 to the point, when sensor 9 and sensor 10 will determine, that step S of spring 6 increased to controlled value, which matches reliable contact of seam 2 with heating element 7.

EFFECT: determined moment of contact of seam between thermocouple and heating element during manual movement of screw holder.

2 cl, 1 dwg

FIELD: engineering of devices for automatic maintenance of pressure of working substance at given level, possible use in systems for supplying natural gas to industrial and communal consumers.

SUBSTANCE: device has body with input and output hollows, locking valve, membrane sensitive mechanism, adjusting valve. Adjusting valve is controlled by membrane drive by second order lever, lever for contact interaction of rod of adjusting valve.

EFFECT: increased device operation reliability.

2 dwg

FIELD: possible use as an adjuster of flow-force characteristics of a liquid.

SUBSTANCE: adjuster contains body 1 with internal portion 2, consisting of control hollow 3, coaxial input 4 and output 5 hollows, between which adjusting organ 6 is positioned, made in form of locking element 7, rigidly connected to rod 8, and spring 9 of locking element 7. control hollow 3 is made in form of two side cylinder-shaped branches 10, connecting input 4 and output 5 hollows.

EFFECT: simplified construction of adjuster of flow-force characteristics and decreased hydraulic losses during adjusting.

1 dwg

Gas reducer // 2290682

FIELD: engineering of gas reducers.

SUBSTANCE: gas reducer contains body 1 with saddle 2 and lid 3, superstructure section, including superstructure screw 4, spring 5, membrane 6 with supporting plate 7 and pusher 8, reducing valve, consisting of hollow body 9 with through channel and thickening 10, balancing chamber 14, connected to hollow 21 of working pressure of body 1 and provided with controlling valve 17. Balancing chamber 14 may be made in body 1, or in its stopper 16, while reducing valve is mounted in the chamber with circular gap relatively to the wall of the latter. Chamber is provided with controlling valve, as spring of which spring of reducing valve is used.

EFFECT: low unevenness coefficient, low dimensions and weight of reducer.

5 cl, 1 dwg

FIELD: automatic control.

SUBSTANCE: device comprises housing, lid, adjusting spring, control members for adjusting specified parameters, and chamber that receives the diaphragm. The diaphragm divides the space of the chamber into the above-diaphragm space connected with the gas pipeline to be controlled and under-diaphragm space connected with the atmosphere. The diaphragm is mounted on the movable rod. The rod passes through the diaphragm at its center and causes the pusher to move. The pusher is connected with the second rod that is perpendicular to the first rod and connected with the third rod. The shutoff valve is mounted on the third rod. The rod of the shutoff valve is oriented parallel to the rod of the diaphragm. The second chamber of the device is positioned in the space between the lid and housing from the side of the lid. The second chamber receives the second diaphragm that is shaped similar to the first diaphragm and separates the second chamber into above-diaphragm space and under-diaphragm space. The under-diaphragm space is in communication with the atmosphere and defines a space between the lid and the second diaphragm. The second diaphragm is mounted on the same rod as the first diaphragm for permitting the above-diaphragm spaces of both of the chambers to be interconnected by means of a passage made in the hollow rod. The second chamber is defined by the cylindrical hollow housing mounted on the lid and receives the a baffle at its center provided with diaphragm for permitting the rod of the diaphragms to pass through them. The rod of the diaphragms is connected with the pusher by means of a bushing. The bushing has side passage oriented parallel to the diaphragms for connection of the above-diaphragm spaces.

EFFECT: enhanced reliability and precision.

2 dwg

FIELD: valving systems.

SUBSTANCE: device comprises pulse tube that connects the control space of pilot with the receiver of the static outlet pressure and is connected with the inner chamber and switch mounted at the site of pipe joint made of e.g. three-position cock. The flexible coupling controls the space between the side and flanges of the inlet and outlet branch pipes depending on the switch position.

EFFECT: expanded functional capabilities.

1 dwg

FIELD: pipeline engineering.

SUBSTANCE: fluid pressure regulator comprises housing provided with a flange having a number of projections shaped into lugs. Each projection has at least one opening made for permitting receiving a fastening member. The regulator has valve provided with the seat, valve plate, valve rod connected with the plate, and valve guide member that locks the rod of the valve. The lever has the first end connected with the valve rod and second end connected with the diaphragm. The force is applied to the rod from the side of the lever in the direction virtually perpendicular to the longitudinal axis of the valve rod. The valve rod has stop member that arrests the valve rod and the plate against movement with respect to the seat of the valve.

EFFECT: enhanced reliability.

21 cl, 8 dwg

FIELD: engineering industry; regulator engineering.

SUBSTANCE: regulator of gas pressure contains valve located on a rod, saddle, central hole, feeler connected by means of lever transmission with a rod. In the valve and in rod channel for a gas supply in a compensating cavity is executed. This cavity is organised by protective and compensating membranes. Regulator has located in a peripheral edge part of the valve the channel for an inlet (input) of gas. Central face part of the valve from periphery has an overlapping element, forming under itself a cavity for a gas course.

EFFECT: productivity gain of the device due to rising of its throughput.

3 cl, 1 dwg

FIELD: heating.

SUBSTANCE: valve unit (1) includes housing with inlet (2) and outlet (3), valve 1 (6) with seat (8) and gate (7) and valve 2 (10) providing stable pressure drop at valve 1 (6). Valve 1 (6) is located in the first part of unit body (A) whereas valve 2 (10) is situated in the second part (B) of unit body. Besides, first part (A) and second part (B) of unit body are interconnected. Pressure transfer channel (28) from outlet (3) to membrane side (24), which is opposite to valve 1 (6) crosses parting surface (C) between the first (A) and second (B) parts of unit body.

EFFECT: simplification of valve unit design.

10 cl, 2 dwg

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