Modular pressure and flow regulating valve group

Abstract

The present application discloses a modular pressure and flow regulating valve group, including an intermediate body and regulating valves at both ends, the regulating valve including a valve cover, a spring, a diaphragm, a pilot valve cage, a sealing ring and a valve stem, the diaphragm is arranged between the valve cover and the intermediate body, the spring is vertically connected to the diaphragm in the valve cover, the pilot valve cage is arranged in the intermediate body and faces the spring, the sealing ring is coaxially sealed in the pilot valve cage, the valve stem cooperates with the sealing ring and coaxially connects the diaphragm and the spring; the left valve cover is provided with an atmospheric communication port, the right valve cover is provided with a first joint, and the intermediate body is provided with a second joint, respectively sensing pressures at different locations; a first control channel and a second control channel are symmetrically provided in the intermediate body, for respectively cooperating with the valve stems at both ends, the intermediate body is also provided with a first connecting channel connected to the inner cavity of the pilot valve cage and a second connecting channel connected to the outer side of the pilot valve cage, and a liquid inlet channel connected to the first control channel is provided on one side, thereby reducing piping and facilitating installation.

Description

Technical Field

[0001] The present invention relates to the technical field of regulating valve equipment, and in particular to a modular pressure and flow regulating valve group. Background Art

[0002] Among control valves, pressure pilot valves and flow pilot valves are commonly used by enterprises. Generally, both control valves are assembled separately and then used alone or in series.

[0003] However, both the pressure pilot valve and the flow pilot valve have many scattered parts. Especially when the pressure pilot valve and the flow pilot valve are used at the same time, they generally have the following defects:

[0004] First, it is relatively troublesome to assemble or repair at the production site or the use site;

[0005] In addition, its irregular shape often requires additional support components such as brackets when configured to work with other products;

[0006] Third, more piping and pressure-taking locations are required for connection, which not only increases the configuration space but also increases the number of leakage points. The probability of piping being damaged by external forces also increases a lot. Summary of the Invention

[0007] One advantage of the present invention is that it provides a modular pressure-flow regulating valve group, in which two regulating valves cooperate with an intermediate body to form an integrated design of a pressure pilot valve and a flow pilot valve. When the pressure pilot valve and the flow pilot valve are used at the same time, the pressure pilot valve and the flow pilot valve are connected through an internal channel in the intermediate body, without the need for additional piping, which can effectively reduce the number of pipes connected to the pressure taking position, not only saving space, but also greatly reducing leakage points and reducing the chance of damage to the piping due to external force impact. The overall reliability and stability are better, and the overall structure is simpler, easy to assemble, repair and maintain.

[0008] One advantage of the present invention is that it provides a modular pressure and flow regulating valve group, in which the valve stem seat directly passes through the diaphragm pressure plate and the diaphragm and is fixed at the other end by a nut, making the regulating valve easier and faster to assemble and having good assembly stability.

[0009] One advantage of the present invention is that it provides a modular pressure-flow regulating valve group, in which the initial pressure difference between the pressure pilot valve and the flow pilot valve can be changed by adjusting the tightness of the springs at both ends through the pressure pilot valve adjusting screw and the flow pilot valve screw, thereby making the modular pressure-flow regulating valve group applicable to various working conditions and having a wide range of applications.

[0010] One advantage of the present invention is that it provides a modular pressure and flow regulating valve group, which is modular in design and has an overall rectangular or cylindrical structure. It is not only small and compact in appearance and occupies little space, but also can be quickly connected and configured with other products through external connectors.

[0011] To achieve at least one of the above advantages of the present invention, the present invention provides a modular pressure and flow regulating valve group, comprising an intermediate body and regulating valves symmetrically arranged at both ends of the intermediate body, wherein the regulating valve comprises a valve cover, a spring, a diaphragm, a pilot valve cage, a sealing ring, and a valve stem, wherein the two diaphragms are respectively vertically arranged between the valve cover and the intermediate body on both sides, the spring is located in the valve cover and vertically connected to the diaphragms, the pilot valve cage is fixedly arranged in the intermediate body and directly faces the spring, the sealing ring is coaxially fixedly arranged in the pilot valve cage, and the outer ring of the sealing ring is in sealing engagement with the pilot valve cage, the valve stem is engaged with the inner ring of the sealing ring, and the diaphragm and the spring are coaxially connected in a manner capable of directionally moving along the expansion and contraction direction of the spring;

[0012] The regulating valves at both ends are defined as a pressure pilot valve and a flow pilot valve, respectively, wherein the valve cover of the pressure pilot valve is provided with an atmospheric communication port on one side, wherein the valve cover of the flow pilot valve is provided with a first connector for connecting to the throat of a venturi tube on one side, and the intermediate body is provided with a second connector for connecting to the inlet end of the venturi tube at one end close to the flow pilot valve;

[0013] The intermediate body is symmetrically provided with a first control channel and a second control channel on the inner sides of the two pilot valve cages, which are used to respectively cooperate with the valve stems at both ends. The intermediate body is also provided with a first connecting channel for connecting the inner cavities of the pilot valve cages at both ends, and a second connecting channel for connecting the outer sides of the two pilot valve cages. The intermediate body is provided with a liquid inlet channel connected to the first control channel on one side, wherein a pressure chamber is formed between the end of the intermediate body and the diaphragm of the pressure pilot valve, and the pressure chamber is connected to the second joint through the second connecting channel.

[0014] According to one embodiment of the present invention, the pilot valve cage is screwed into the intermediate body via an external thread, and the pilot valve cage is provided with a receiving groove for accommodating the sealing ring at one end where the external thread is provided, a sealing ring pressure ring is installed in the receiving groove on the outside of the sealing ring, and the valve stem is provided with an inclined transition portion that cooperates with the sealing ring, wherein the small end of the inclined transition portion is close to the pilot valve cage.

[0015] According to one embodiment of the present invention, diaphragm pressure plates are coaxially arranged on both sides of the diaphragm, and a valve stem seat is provided on the side of the valve stem close to the valve cover. One end of the valve stem seat cooperates with the valve stem, and the other end passes through the diaphragm pressure plate and the diaphragm, and is connected to the spring.

[0016] According to one embodiment of the present invention, the portion of the other end of the valve stem seat protruding from the diaphragm pressure plate is provided with an external thread, and a nut suitable for being screwed onto the end of the valve stem seat is provided on the outside of the diaphragm pressure plate, wherein the nut is located in the inner cavity of the spring.

[0017] According to an embodiment of the present invention, the outer edge of the diaphragm pressure plate on the side close to the diaphragm is an arc-shaped transition, and the area of the diaphragm pressure plate close to the valve cover is larger than the area of the diaphragm pressure plate close to the intermediate body.

[0018] According to one embodiment of the present invention, a pressure pilot valve adjusting screw is provided on the side of the pressure pilot valve away from the intermediate body, the pressure pilot valve adjusting screw passes through the valve cover and is coaxially connected to the spring, and the pressure pilot valve adjusting screw is sleeved with a first locking nut, which is abutted against the side of the pressure pilot valve.

[0019] According to one embodiment of the present invention, a flow pilot valve adjusting screw is provided on the side of the flow pilot valve away from the intermediate body, the flow pilot valve adjusting screw passes through the valve cover and is coaxially connected to the spring, and the flow pilot valve adjusting screw is sleeved with a second locking nut, and the second locking nut is abutted against the side of the flow pilot valve.

[0020] According to one embodiment of the present invention, the intermediate body and the valve covers at both ends are assembled into a rectangular parallelepiped structure or a cylindrical structure, and the pressure pilot valve adjusting screw and the flow pilot valve adjusting screw are symmetrically arranged at both ends of the rectangular parallelepiped structure or the cylindrical structure.

[0021] According to an embodiment of the present invention, a plurality of external connecting members are provided on the surface of the intermediate body, wherein the external connecting members include connecting screws.

[0022] These and other objects, features and advantages of the present invention will be fully reflected in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the partial three-dimensional structure of a modular pressure and flow regulating valve group according to a preferred embodiment of the present application is shown.

[0024] Figure 2 A schematic cross-sectional view of a modular pressure and flow regulating valve group according to a preferred embodiment of the present application is shown.

[0025] Figure 3 A schematic cross-sectional view of the modular pressure and flow regulating valve group connected to the venturi tube in the present application is shown. DETAILED DESCRIPTION

[0026] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0027] Those skilled in the art should understand that, in the disclosure of the specification, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0028] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0029] refer to Figures 1 to 3 A modular pressure and flow regulating valve group according to a preferred embodiment of the present invention will be described in detail below, wherein the modular pressure and flow regulating valve group includes an intermediate body 10 and regulating valves 20 symmetrically arranged at both ends of the intermediate body 10, wherein the regulating valve 20 includes a valve cover 21, a spring 22, a diaphragm 23, a pilot valve cage 24, a sealing ring 25 and a valve stem 26, wherein the two diaphragms 23 are respectively vertically arranged between the valve cover 21 and the intermediate body 10 on both sides, wherein the spring 22 is located in the valve cover 21 and vertically connected to the diaphragm 23. The middle position of the intermediate body 10, wherein the pilot valve cage 24 is fixedly arranged in the intermediate body 10 and faces the spring 22, wherein the sealing ring 25 is coaxially fixedly arranged in the pilot valve cage 24, and the outer ring of the sealing ring 25 is sealed with the pilot valve cage 24, and at the same time, the valve stem 26 is matched with the inner ring of the sealing ring 25, and is coaxially connected to the diaphragm 23 and the spring 22 in a manner that can be directional moved along the expansion and contraction direction of the spring 22, wherein the gap between the valve stem 26 and the sealing ring 25 is the opening of the regulating valve 20;

[0030] The regulating valves 20 at both ends are respectively defined as a pressure pilot valve 30 and a flow pilot valve 40, wherein the valve cover 21 of the pressure pilot valve 30 is provided with an atmospheric communication port 301 on one side, and the valve cover 21 of the flow pilot valve 40 is provided with a first connector 41 on one side for connecting to the throat 51 of the venturi tube 50 for sensing the pressure at the throat 51 of the venturi tube 50, and the intermediate body 10 is provided with a second connector 11 at one end close to the flow pilot valve 40 for connecting to the inlet end 52 of the venturi tube 50 for sensing the pressure at the front end of the venturi tube 50;

[0031] A first control channel 101 and a second control channel 102 are symmetrically provided on the inner sides of the two pilot valve cages 24 in the intermediate body 10, for respectively cooperating with the valve stems 26 at both ends, that is, providing avoidance space for the left and right movement of the valve stems 26. At the same time, a first connecting channel 103 for connecting the inner cavities of the pilot valve cages 24 at both ends is further provided in the intermediate body 10, and a second connecting channel 104 for connecting the outer sides of the two pilot valve cages 24 is provided. In this way, the design of conventional piping is circumvented by the provision of the first connecting channel 103 and the second connecting channel 104, so that the modular pressure and flow regulating valve group can meet both the pressure regulating function of the conventional pressure pilot valve and the flow regulating function of the conventional flow pilot valve. At the same time, it can also effectively reduce the number of piping and reduce leakage points, thereby greatly reducing the probability of piping being damaged by external force impact. The key point is that the modular pressure and flow regulating valve group integrates the functions of the pressure pilot valve and the flow pilot valve at the same time. The overall structure is more compact and occupies less space. It is also easy to install and use quickly, and a new module can be directly replaced when a problem occurs, which is easy to maintain. In addition, the intermediate body 10 is provided with a liquid inlet channel 105 connected to the first control channel 101 on one side. At the same time, a pressure chamber 106 is formed between the end of the intermediate body 10 and the diaphragm 23 of the pressure pilot valve 30, wherein the pressure chamber 106 is connected to the second joint 11 through the second connecting channel 104.

[0032] During use, the medium enters the first control channel 101 of the intermediate body 10 from the liquid inlet channel 105 at the P0 position, and then is reduced to P1 by the action of the sealing ring 25 on the side of the pressure pilot valve 30, flows into the first connecting channel 103, and then is reduced to P2 by the action of the sealing ring 25 in the second control channel 102. A part of the medium at P2 pressure flows into the pressure chamber 106 and serves as the pressure object regulated by the pressure pilot valve 30. At the same time, the medium at P2 pressure also serves as the front end pressure of the venturi tube 50, that is, the pressure pilot valve 30 regulates the front pressure of the venturi tube 50, or The pressure on both sides of the diaphragm 23 in the pressure pilot valve 30 is adjusted. Since the atmospheric communication port 301 is directly connected to the external atmosphere and is a constant value, the adjustment object of the pressure pilot valve 30 is actually the pressure value on the right side of the diaphragm 23. In addition, the medium of P2 pressure also serves as the high pressure regulated by the flow pilot valve 40, and the low pressure regulated by the flow pilot valve 40 is P3, which is connected to the throat 51 position of the Venturi tube 50. In other words, the flow pilot valve 40 adjusts the pressure difference between the front of the Venturi tube 50 and the throat 51 of the Venturi tube 50, that is, the pressure difference on both sides of the diaphragm 23 in the flow pilot valve 40.

[0033] In one embodiment, the pilot valve cage 24 is screwed into the intermediate body 10 via an external thread, and the pilot valve cage 24 is provided with a receiving groove for accommodating the sealing ring 25 at one end where the external thread is provided, wherein a sealing ring pressure ring 27 is installed in the receiving groove on the outside of the sealing ring 25 for pressing and fixing the sealing ring 25 to improve the reliability and stability of the seal. At the same time, the valve stem 26 is provided with an inclined transition portion 261 that cooperates with the sealing ring 25, wherein the small end of the inclined transition portion 261 is close to the pilot valve cage 24, so that when the valve stem 26 moves left and right, a corresponding opening size can be formed based on the inclination of the inclined transition portion 261.

[0034] In addition, a spring 262 for being sleeved on the valve stem 26 is respectively provided in the first control channel 101 and the second control channel 102. One end of the spring 262 abuts against the inclined transition portion 261, and the other end abuts against the intermediate body 10, thereby providing the valve stem 26 with a rebound force to move toward both sides, or providing a binding force that makes the valve stem 26 tightly combined with the sealing ring 25, thereby ensuring the sealing of the regulating valve 20 even in the case of loss of pressure or no pressure.

[0035] In one embodiment, diaphragm pressure plates 231 are coaxially arranged on both sides of the diaphragm 23. At the same time, a valve stem seat 263 is provided on the side of the valve stem 26 close to the valve cover 21, wherein one end of the valve stem seat 263 cooperates with the valve stem 26, and the other end of the valve stem seat 263 passes through the diaphragm pressure plate 231 and the diaphragm 23, and is connected to the spring 22, so that the structural strength of the diaphragm 23 can be improved through the diaphragm pressure plate 231, and the connection stability between the spring 22, the valve stem seat 263 and the diaphragm 23 is ensured, thereby ensuring the movement reliability of the diaphragm 23.

[0036] Further preferably, the portion of the other end of the valve stem seat 263 protruding from the diaphragm pressure plate 231 is provided with an external thread, and at the same time, the outer side of the diaphragm pressure plate 231 is provided with a nut 232 suitable for being screwed to the end of the valve stem seat 263, wherein the nut 232 is located in the inner cavity of the spring 22. In this way, it is only necessary to pass the valve stem seat 263 through the diaphragm pressure plate 231 and the diaphragm 23, and then tighten the nut 232 at the external thread and adhere it to the diaphragm pressure plate 231, so that the regulating valve 20 can be quickly and accurately assembled into place. On the contrary, during the maintenance or repair of the regulating valve 20, the regulating valve 20 can also be quickly disassembled.

[0037] Further preferably, the outer edge of the diaphragm pressure plate 231 on the side close to the diaphragm 23 is an arc-shaped transition 233, and the area of the diaphragm pressure plate 231 close to the valve cover 21 is larger than the area of the diaphragm pressure plate 231 close to the intermediate body 10, so that during the left and right movement of the diaphragm 23, the diaphragm 23 can be protected by the structure of the arc-shaped transition 233, thereby extending the service life of the diaphragm 23. In addition, considering that the pressure in the intermediate body 10 is generally high pressure, the area of the diaphragm pressure plate 231 close to the valve cover 21 is designed to be larger than the area of the diaphragm pressure plate 231 close to the intermediate body 10, which can enable the diaphragm pressure plate 231 with a larger area to form a larger area of support, further ensuring the working reliability of the diaphragm 23.

[0038] As a preferred embodiment, a pressure pilot valve adjusting screw 31 is provided on the side of the pressure pilot valve 30 away from the intermediate body 10, wherein the pressure pilot valve adjusting screw 31 passes through the valve cover 21 and is coaxially connected to the spring 22. At the same time, the pressure pilot valve adjusting screw 31 is sleeved with a first locking nut 32, wherein the first locking nut 32 is abutted against the side of the pressure pilot valve 30, so that the tightness of the spring 22 in the pressure pilot valve 30 can be adjusted by the pressure pilot valve adjusting screw 31, so that the pressure pilot valve 30 can obtain a reasonable initial pressure adjustment value.

[0039] Further preferably, a flow pilot valve adjusting screw 42 is provided on the side of the flow pilot valve 40 away from the intermediate body 10, wherein the flow pilot valve adjusting screw 42 passes through the valve cover 21 and is coaxially connected to the spring 22. At the same time, the flow pilot valve adjusting screw 42 is sleeved with a second locking nut 43, wherein the second locking nut 43 is abutted against the side of the flow pilot valve 40, so that the tightness of the spring 22 in the flow pilot valve 40 can be adjusted by the flow pilot valve adjusting screw 42, so that the flow pilot valve 40 can obtain a reasonable initial pressure adjustment value, combined with the reasonable initial pressure adjustment value of the pressure pilot valve 30, so that the modular pressure flow regulating valve group provided in the present application is suitable for working well under different working conditions and has a wide range of applications.

[0040] Further preferably, the intermediate body 10 and the valve covers 21 at both ends are assembled into a rectangular structure or a cylindrical structure. The overall structure is more compact, occupies less space, and is convenient for application in different working conditions. At the same time, the pressure pilot valve adjusting screw 31 and the flow pilot valve adjusting screw 42 are symmetrically arranged at both ends of the rectangular structure or the cylindrical structure.

[0041] Further preferably, the surface of the intermediate body 10 is provided with a plurality of external connecting parts, wherein the external connecting parts include connecting screws 12, so as to facilitate the quick connection and use of the modular pressure flow regulating valve group and other products. At the same time, when problems occur, it is also convenient to directly disassemble it and replace it with other modular pressure flow regulating valve groups.

[0042] It should be noted that the terms "first" and "second" in the present invention are only used for descriptive purposes and do not indicate any order. They cannot be understood as indicating or implying relative importance. These terms can be interpreted as names.

[0043] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended to be illustrative only and are not intended to limit the present invention. The advantages of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. Modular pressure and flow regulating valve group, characterized by: A regulating valve comprising an intermediate body and symmetrically arranged at both ends of the intermediate body, wherein the regulating valve comprises a valve cover, a spring, a diaphragm, a pilot valve cage, a sealing ring and a valve stem, wherein the two diaphragms are respectively vertically arranged between the valve cover and the intermediate body on both sides, the spring is located in the valve cover and vertically connected to the diaphragms, the pilot valve cage is fixedly arranged in the intermediate body and directly faces the spring, the sealing ring is coaxially fixedly arranged in the pilot valve cage, and the outer ring of the sealing ring is in sealing engagement with the pilot valve cage, the valve stem is engaged with the inner ring of the sealing ring, and the diaphragm and the spring are coaxially connected in a manner capable of directionally moving along the expansion and contraction direction of the spring; The regulating valves at both ends are defined as a pressure pilot valve and a flow pilot valve, respectively, wherein the valve cover of the pressure pilot valve is provided with an atmospheric communication port on one side, wherein the valve cover of the flow pilot valve is provided with a first connector for connecting to the throat of a venturi tube on one side, and the intermediate body is provided with a second connector for connecting to the inlet end of the venturi tube at one end close to the flow pilot valve; The intermediate body is symmetrically provided with a first control channel and a second control channel on the inner sides of the two pilot valve cages, respectively used to cooperate with the valve stems at both ends. The intermediate body is also provided with a first connecting channel for communicating with the inner cavities of the pilot valve cages at both ends, and a second connecting channel for connecting the outer sides of the two pilot valve cages. The intermediate body is provided with a liquid inlet channel connected to the first control channel on one side, wherein a pressure chamber is formed between the end of the intermediate body and the diaphragm of the pressure pilot valve, and the pressure chamber is connected to the second joint through the second connecting channel. The pilot valve cage is screwed into the intermediate body via an external thread, and the pilot valve cage is provided with a receiving groove for accommodating the sealing ring at one end provided with the external thread, a sealing ring pressure ring is installed in the receiving groove on the outer side of the sealing ring, and the valve stem is provided with an inclined transition portion that matches the sealing ring, wherein the small end of the inclined transition portion is close to the pilot valve cage; Diaphragm pressure plates are coaxially arranged on both sides of the diaphragm, and a valve stem seat is provided on the side of the valve stem close to the valve cover. One end of the valve stem seat cooperates with the valve stem, and the other end passes through the diaphragm pressure plate and the diaphragm, and is connected to the spring.

2. The modular pressure and flow regulating valve group according to claim 1, characterized in that: The other end of the valve stem seat protruding from the diaphragm pressure plate is provided with an external thread, and the outer side of the diaphragm pressure plate is provided with a nut suitable for being screwed to the end of the valve stem seat, wherein the nut is located in the inner cavity of the spring.

3. The modular pressure and flow regulating valve group according to claim 2, characterized in that: The outer edge of the diaphragm pressure plate on one side close to the diaphragm is an arc-shaped transition, and the area of the diaphragm pressure plate close to the valve cover is larger than the area of the diaphragm pressure plate close to the intermediate body.

4. The modular pressure and flow regulating valve group according to claim 1, characterized in that: A pressure pilot valve adjusting screw is provided on the side of the pressure pilot valve away from the intermediate body. The pressure pilot valve adjusting screw passes through the valve cover and is coaxially connected to the spring. The pressure pilot valve adjusting screw is sleeved with a first locking nut, which is abutted against the side of the pressure pilot valve.

5. The modular pressure and flow regulating valve group according to claim 4, characterized in that: A flow pilot valve adjusting screw is provided on the side of the flow pilot valve away from the intermediate body. The flow pilot valve adjusting screw passes through the valve cover and is coaxially connected to the spring. The flow pilot valve adjusting screw is sleeved with a second locking nut, and the second locking nut is abutted against the side of the flow pilot valve.

6. The modular pressure and flow regulating valve group according to claim 5, characterized in that: The intermediate body and the valve covers at both ends are assembled into a rectangular parallelepiped structure or a cylindrical structure, and the pressure pilot valve adjusting screw and the flow pilot valve adjusting screw are symmetrically arranged at both ends of the rectangular parallelepiped structure or the cylindrical structure.

7. The modular pressure and flow regulating valve group according to claim 6, characterized in that: A plurality of external connecting parts are arranged on the surface of the intermediate body, wherein the external connecting parts include connecting screws.

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