CN218063546U

CN218063546U - Pressure control valve

Info

Publication number: CN218063546U
Application number: CN202220972986.9U
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Current assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Priority date: 2022-02-14
Filing date: 2022-04-22
Publication date: 2022-12-16
Anticipated expiration: 2032-04-22

Abstract

The utility model discloses a pressure control valve, which comprises a valve body component, a valve core component and an actuating component, wherein the pressure control valve is provided with an inlet channel and an outlet channel; the valve core component comprises a valve core, the valve body component comprises a valve body, and the valve body is provided with a valve port, and the valve is characterized in that the valve body comprises an upper accommodating cavity, a lower accommodating cavity, a valve core accommodating hole and a side hole, wherein the side hole can be communicated with the upper accommodating cavity, the lower accommodating cavity and the inlet channel; the case wears to establish the case accommodation hole, the part that actuates includes the diaphragm, the diaphragm is airtight hold the chamber's last port, the diaphragm can with the case is direct or indirect butt. The pressure control valve improves the working reliability under the high-pressure fluid medium environment.

Description

Pressure control valve

Technical Field

The utility model relates to a fluid pressure control technical field particularly, relates to a pressure control valve.

Background

Pressure control valves are commonly used in the field of fluid control technology, and fig. 1 is a schematic structural diagram of a pressure control valve in the background art. As shown in fig. 1, the pressure control valve has the function of an unloading valve, and comprises a valve body part 1, wherein the valve body part 1 is provided with an upper cavity 2 and a lower cavity 3, and the upper cavity 2 and the lower cavity 3 are isolated by an elastic diaphragm 4. An adjusting part 5 is arranged in the upper cavity 2, and a valve core part 6 is arranged in the lower cavity 3. The spool member 6 and the regulation member 5 abut the elastic diaphragm 4 from above/below, respectively, to create dynamic force balance. In a valve closing state, when the pressure of fluid in the inlet cavity 7 rises to a certain value, the dynamic force balance is changed, the valve core component 6 moves to open the valve port 8, and the fluid flows out of the outlet cavity 9; similarly, in the open state, when the fluid pressure in the inlet chamber 7 is reduced to a certain value, the dynamic force balance is changed, and the valve core component 6 moves to close the valve port 8.

With the development of industrial technology, the pressure control valve needs to be applied to some flow path systems of high-pressure fluid media, and new requirements are made on the reliability of the pressure control valve.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pressure control valve, which comprises a valve body part, a valve core part and an actuating part, wherein the pressure control valve is provided with an inlet channel and an outlet channel; the valve element component comprises a valve element, the valve body component comprises a valve body, the valve body is provided with a valve port, the valve body comprises an upper accommodating cavity, a lower accommodating cavity, a valve element accommodating hole and a side hole, the inlet channel and the outlet channel are arranged approximately along the radial direction of the valve body, the valve element accommodating hole is arranged approximately along the longitudinal direction of the valve body, the upper accommodating cavity is positioned at the upper section of the valve body, the lower accommodating cavity is positioned at the lower section of the valve body, and the side hole can be communicated with the upper accommodating cavity, the lower accommodating cavity and the inlet channel; the valve element penetrates through the valve element accommodating hole, the valve element accommodating hole extends upwards to form the valve port, the outlet channel is communicated with the valve port, the actuating part comprises a membrane, the membrane seals the upper port of the upper accommodating cavity, and the membrane can be directly or indirectly abutted against the valve element.

The utility model provides a pressure control valve optimizes through structural design, has improved the operational reliability of pressure control valve under the high-pressure fluid medium environment.

Drawings

FIG. 1: a schematic diagram of a pressure control valve of the background art;

FIG. 2: the utility model provides a schematic structural diagram of a pressure control valve;

FIG. 3: FIG. 2 is a schematic view of the valve body and the valve core member in combination;

FIG. 4 is a schematic view of: FIG. 2 is a schematic view of the valve body and closure plate cooperating;

FIG. 5: FIG. 2 is a schematic view of the valve cover body and the valve sleeve body;

FIG. 6: the utility model provides a structural schematic of another kind of pressure control valve.

Symbolic illustration in fig. 2-6:

10/10A-control valve/pressure relief valve;

100/100A-valve body component;

110/110A-valve body;

111-port part, 112-port;

113-a spool-receiving bore;

114-first step, 115-first step;

116-an upper accommodating cavity 117-lower receiving chamber;

118-side hole, 119-transverse through hole;

120/120A-valve cap body;

121-plate portion, 122-step portion;

130/130A-valve housing body;

131-tube section, 132-reducing section;

140-closing plate;

141-plate portion, 142-supporting projection portion, 143-step surface;

180-inlet connection pipe, 190-outlet connection pipe;

200/200A-spool component;

210/210A-spool;

211/211A-rod, 212-upper end, 213-lower end;

214-upper cone, 215-lower cone;

216-upper taper portion, 217-lower step portion;

218-step end;

220-fixed gasket, 230-movable gasket, 240-sealing ring;

300-an actuating member;

310-an adjusting seat;

320-a compression spring;

330-spring seat;

340-a transmission member;

350-diaphragm, 360-diaphragm seat;

400-a support member;

410-a support spring;

600-a valve cavity;

610-upper chamber, 620-lower chamber;

630-a balancing chamber;

640-a regulation cavity;

650-inlet channel, 660-outlet channel.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. The upper and lower terms used herein are defined by the positions of the components shown in the drawings, and are only used for the sake of clarity and convenience in technical solution, and it should be understood that the terms used herein should not limit the scope of the claims; it will also be appreciated that the structural relationships illustrated herein, whether connected, secured, abutted, or otherwise, are intended to encompass both direct and indirect methods, unless specifically noted to embody the novel concepts of its utility.

Fig. 2 is a schematic structural view of a pressure control valve, fig. 3 is a schematic structural view of the valve body and the valve element component in fig. 2, fig. 4 is a schematic structural view of the valve body and the sealing plate in fig. 2, and fig. 5 is a schematic structural view of the valve cover body and the valve cover body in fig. 2.

As shown in fig. 2, 3, 4 and 5. In this particular embodiment, the pressure control valve 10 functions as a pressure relief valve in a flow path system by setting a pressure threshold for the inlet fluid that opens when reached. The pressure relief valve 10 includes a valve body member 100, a spool member 200, an actuating member 300, and a support member 400.

The valve body part 100 includes a valve body 110 and a cap body 120, and the actuating part 300 includes a diaphragm 350. The diaphragm 350, the bonnet body 120, and the valve body 110 are stacked and fixed at their peripheries by laser welding, and after the bonnet body 120 and the valve body 110 are welded, the diaphragm 350 hermetically divides the inner cavity of the valve body 100 into an upper cavity 610 and a lower cavity 620, the valve cavity 600 of the pressure control valve/pressure relief valve 10 is located in the lower cavity 620, and the diaphragm 350 faces the valve cavity 600.

The valve body 110 defines an inlet channel 650 and an outlet channel 660. The inlet connecting pipe 180 and the outlet connecting pipe 190 are fixedly connected with the valve body 110 in a welding mode respectively, the inlet channel 650 is communicated with the inlet connecting pipe 180, and the outlet channel 660 is communicated with the outlet connecting pipe 190. The valve body 110 further defines a balance chamber 630, and the balance chamber 630 is located in the lower chamber 620.

The valve body 110 includes an upper receiving chamber 116 and a lower receiving chamber 117. The valve body 110 further includes a valve core receiving hole 113 and a side hole 118 vertically disposed to communicate the upper receiving cavity 116 and the lower receiving cavity 117, a valve port 111 is formed extending from an upper end of the valve core receiving hole 113, and the valve port 112 is opened at the valve port 111.

The axis of the inlet passage 650 of the valve body 110 and the axis of the outlet passage 660 are substantially parallel (radially disposed), and the inlet passage 650 communicates with the upper receiving chamber 116 and the lower receiving chamber 117 through the side hole 118. The valve body 110 includes a lateral through hole 119 longitudinally communicating the outlet passage 660 with the spool receiving hole 113, the lateral through hole 119 serving as a balance chamber 630. The axial direction in which the spool 211 moves is substantially longitudinally disposed. A diaphragm 350 is welded to the upper end and closes the upper port of the upper receiving chamber 116.

In the technical scheme, the side hole 118, the upper accommodating cavity 116 and the lower accommodating cavity 117 form a valve cavity of the pressure control valve, and the structural improvement can improve the high-pressure resistance of the valve cavity and improve the working reliability of the pressure control valve in a high-pressure fluid medium environment. Moreover, the valve body is convenient to process, and the processing manufacturability of parts is improved.

As a further technical solution, the valve core component 200 includes a valve core 210, and the valve core 210 is located in a lower cavity 620. The valve body 210 is substantially rod-shaped and includes a rod portion 211, an upper end portion 212, and a lower end portion 213. The rod portion 211 is provided with an upper tapered portion 214 and a lower tapered portion 215 which are axially symmetrical up and down. In the moving direction of the valve body 210, the tapered surfaces of the upper tapered portion 214 and the lower tapered portion 215 face the balance chamber 630, and the tapered surfaces of the upper tapered portion 214 and the lower tapered portion 215 are disposed to face each other.

The inlet passage 650 communicates directly with the valve chamber 600 and the balance chamber 630 communicates with the outlet passage 660. In the valve-closed state, the valve body 210 abuts against the valve port 111, and the space between the valve chamber 600 and the equilibrium chamber 630 is closed by the valve port 112, thereby hermetically isolating the valve chamber 600 and the equilibrium chamber 630. Since the valve chamber 600 does not communicate with the balance chamber 630, the fluid pressure in the outlet passage 660 acts on the spool 210 through the balance chamber 630.

Specifically, when fluid pressure is applied from the balance chamber 630, the tapered surface of the upper tapered portion 214 serves as a first pressure receiving surface S1, and the tapered surface of the lower tapered portion 215 serves as a second pressure receiving surface S2, and S1 is disposed opposite to S2, so that S1 generates a force F1 that axially displaces the valve body 210 upward; s2 generates a force F2 that displaces the spool 210 axially downward. If the setting is as follows: the equivalent area of S1 in the axial moving direction of the valve body 210 is A1, the equivalent area of S2 in the axial moving direction of the valve body 210 is A2, and when A1= A2 is satisfied, F1= F2, and the direction of F1 is opposite to the direction of F2. The fluid pressure in the outlet channel 660 is balanced in the axial direction of the movement of the valve element 210 (i.e., the up-down force is cancelled out and does not affect the valve element 210).

This solution is advantageous when the fluid pressure in the outlet channel 660 of the pressure control valve 10 is dischargedWhen the pressure fluctuates, the influence on the valve opening control of the valve core 210 can be reduced, the regulation precision of the pressure control valve is improved, and the pressure control valve can be suitable for working environments with higher fluid pressure and working environments with larger fluid pressure fluctuation, such as CO ₂ A piping system.

As a further technical solution, the valve body 100 further includes a valve cover body 130, and the valve cover body 130 is welded and fixed to the valve cover body 120. The valve housing body 130 has a circular radial profile and may be formed from a tube material, including an upper section of tube segment 131 and a lower section of reduced diameter segment 132. The valve cover body 120 has a circular radial contour, and includes an upper step 122 and a lower plate 121, and the end of the step 122 has a central hole 123. The diameter-reduced section 132 of the valve sleeve body 130 is in positioning fit with the step portion 122 of the valve cover body 120 and welded, and the plate portion 121 is welded and fixed to the valve body 110, so that the welding strength among the valve sleeve body 130, the valve cover body 120 and the valve body 110 can be improved, and the tightness of the cavity is high.

The inner cavity of the tube segment 131 of the valve housing body 130 forms a regulated chamber 640. The actuating member 300 further includes an adjusting seat 310, a pressing spring 320, a spring seat 330, a transmission 340, and a diaphragm seat 360. The diaphragm seat 360 is located in the upper chamber 610 and can abut the diaphragm 350 downward. The biasing spring 320 is located in the adjustment chamber 640, and the spring seat 330 supports the biasing spring 320. The adjusting seat 310 is screwed with the valve housing body 130, and the initial compression amount of the pressing spring 320 is changed by screwing the adjusting seat 310 with respect to the valve housing body 130, so as to adjust the magnitude of the downward pressure on the diaphragm 350. The transmission member 340 may be a steel ball penetrating through the middle hole 123, the upper end of the steel ball is located in the adjusting cavity 640 and abuts against the spring seat 330, and the lower end of the steel ball is located in the upper cavity 610 and abuts against the diaphragm seat 360.

In a specific embodiment, the valve body 100 further includes a cover plate 140, the radial profile of the cover plate 140 is substantially circular, and includes a plate portion 141 and a support protrusion 142, and the plate portion 141 has a stepped surface 143. The valve body 110 has a substantially circular radial contour, the lower end of the valve body 110 abuts against the stepped surface 143 as a welding mating surface, and the sealing plate 140 is welded to the valve body 110 to close the lower port of the lower receiving chamber 117. The support member 400 includes a support spring 410, a lower outer case support protrusion 142 of the support spring 410, one end of the support spring 410 abutting against the cover plate 140, and the other end of the support spring 410 abutting against the lower end 213 of the valve body 210.

The technical scheme further ensures that the product mounting structure is stable, the cavity has strong tightness, and the device can adapt to pipelines of high-pressure fluid media, such as CO ₂ And (4) a matter system.

As a specific embodiment, the valve core component 200 further includes a fixed shim 220 and a movable shim 230. The spool receiving hole 113 includes a first step hole 114 and a second step hole 115 facing the lower receiving chamber 117, the second stepped bore 115 has an inner diameter greater than that of the first stepped bore 114. The fixing gasket 220 is disposed in the second stepped hole 115, and the fixing gasket 220 is fixedly connected to or disposed in a limited manner with respect to the valve body 110. The stem portion 211 of the valve element 210 is disposed through the valve element receiving hole 113, the lower end 213 of the valve element 210 includes a step end 218, the movable gasket 230 is disposed on the step end 218, and the movable gasket 230 is fixedly connected to or disposed in a limited manner with the valve body 110. The support spring 410 indirectly supports the valve core 210 through the movable gasket 230.

The upper end 212 of the poppet 210 directly or indirectly supports the diaphragm 350. A seal ring 240 is disposed between an outer wall of a lower section of the stem portion 211 and an inner wall of the valve element receiving hole 113, the seal ring 240 is located in the first stepped hole 114, and the seal ring 240 can abut against a radial direction of the valve element 210. In the state that the upper valve port 112 is closed, the valve chamber 600 and the balance chamber 630 can be sealed and isolated by the sealing ring 240.

As a further technical solution, the hardness of the material of the fixed shim 220 and the movable shim 230 is greater than that of the valve body 110, so as to reduce the wear of the valve body 110.

The diaphragm 350 abuts downward against the upper end 212 of the valve cartridge 210 and the upward force of the support spring 410 abuts the lower end 213 of the valve cartridge 210. The diaphragm 350 is simultaneously acted upon by the axially downward force of the biasing spring 320 and by the upward force of the high pressure fluid in the inlet passage 650. In the valve-closed state, the resultant force applied to the valve element 210 in the axial direction tends to be downward, and the valve element 210 abuts against the valve port 112. When the pressure of the high-pressure fluid in the inlet channel 650 increases, the diaphragm 350 is stressed and changed, and the resultant force applied to the valve element 210 in the axial direction changes and tends to be upward, the valve element 210 starts to slide upward and leave the valve opening 112, and the valve port is opened. When the valve core 210 continues to move upward, the movable gasket 230 abuts against the fixed gasket 220, so that the upward displacement of the valve core 210 can be limited, the diaphragm 350 is limited and protected, and the diaphragm 350 is prevented from being excessively deformed to reduce reliability.

Fig. 6 is a schematic structural diagram of another pressure control valve according to the present invention.

As shown in fig. 6. Unlike the foregoing technical solutions, in this embodiment, the pressure relief valve 10A includes a valve body member 100A and a spool member 200A.

The valve body 100A includes a valve body 110A, a bonnet body 120A, and a bonnet body 130A. The sleeve body 130A and the valve cover body 120A are integrally processed by metal pipes; the spool member 200A includes a spool 210A, and the spool 210A includes a rod portion 211A, and an upper tapered portion 216 and a lower stepped portion 217 are opened along an axial direction of the rod portion 211A. The technical scheme can also achieve the technical effect of the technical scheme, and is not described herein again.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A pressure control valve comprises a valve body part, a valve core part and an actuating part, wherein the pressure control valve is provided with an inlet channel and an outlet channel; the case part includes the case, the valve body part includes the valve body, the valve body is equipped with valve port, its characterized in that:

the valve body comprises an upper accommodating cavity, a lower accommodating cavity, a valve core accommodating hole and a side hole, the inlet channel and the outlet channel are arranged along the radial direction of the valve body, the valve core accommodating hole is arranged along the longitudinal direction of the valve body, the upper accommodating cavity is positioned at the upper section of the valve body, the lower accommodating cavity is positioned at the lower section of the valve body, and the side hole can be communicated with the upper accommodating cavity, the lower accommodating cavity and the inlet channel;

the valve core penetrates through the valve core accommodating hole, the valve core accommodating hole extends upwards to form the valve port, the outlet channel is communicated with the valve port, the actuating part comprises a membrane, the membrane seals an upper port of the upper accommodating cavity, and the membrane can be directly or indirectly abutted against the valve core.

2. The pressure control valve of claim 1, further comprising a support member, the support member including a support spring, the valve body member further including a sealing plate, the sealing plate being welded to the valve body, the sealing plate sealing a lower cavity opening of the lower receiving cavity, one end of the support spring abutting the sealing plate, and the other end of the support spring abutting the valve element.

3. The pressure control valve of claim 2 wherein the radial profiles of the sealing plate and the valve body are generally circular, the sealing plate including a plate portion having a stepped surface against which the lower end of the valve body abuts, the sealing plate being welded to the valve body.

4. The pressure control valve of claim 3 wherein said sealing plate further includes support bosses, said support bosses being received by said lower section of said support spring.

5. The pressure control valve according to claim 1, wherein the actuating member further comprises a pressure spring and a transmission member, the valve body member further comprises a valve cover body and a valve cover body, the pressure spring is located in the adjustment cavity of the valve cover body, the pressure spring abuts against the transmission member, the transmission member abuts against the diaphragm, the valve cover body and the valve cover body are welded and fixed or the valve cover body and the valve cover body are integrally formed, and the diaphragm, the valve body and the valve cover body are welded and fixed.

6. The pressure control valve of claim 5, wherein the radial profiles of the valve housing body and the valve cover body are substantially circular, the lower section of the valve housing body comprises a reduced diameter section, the valve cover body comprises a stepped portion of an upper section and a plate portion of a lower section, the reduced diameter section is matched with the stepped portion and is welded and fixed, the plate portion is welded and fixed with the valve body, the stepped portion comprises a middle hole, and the transmission member penetrates through the middle hole.

7. The pressure control valve according to any one of claims 1 to 6, wherein the spool receiving hole includes a first stepped hole facing the lower receiving chamber, the first stepped hole being provided with a seal ring capable of abutting a radial direction of the spool.

8. The pressure control valve according to claim 7, wherein the spool member further includes a fixed washer and a movable washer, the spool receiving hole further includes a second stepped hole facing the lower receiving chamber, the second stepped hole having an inner diameter larger than that of the first stepped hole, and the fixed washer is fixedly disposed in the second stepped hole.

9. The pressure control valve of any one of claims 1-6, wherein the valve body is generally cylindrical, the valve body further comprising a balance chamber, the inlet channel, and the outlet channel, the balance chamber communicating the outlet channel with the valve port; the valve core comprises a first pressure bearing face and a second pressure bearing face, and the first pressure bearing face and the second pressure bearing face respectively face the balance cavity and are arranged oppositely in the moving direction of the valve core.

10. The pressure control valve of claim 9, wherein the valve spool is generally rod-shaped, the valve spool including a stem portion, the stem portion including the first pressure bearing face and the second pressure bearing face, the first pressure bearing face, and/or the second pressure bearing face being a tapered face or a stepped face.