Filtering pressure reducing valve capable of rapidly recovering flow pressure drop

Abstract

The utility model relates to the technical field of pressure reducing valves, in particular to a filtering pressure reducing valve capable of quickly recovering flow pressure drop, which comprises an upper valve body, a main valve body and a lower valve body which are concentrically connected, a diaphragm is arranged at the top end of the main valve body; the main valve body is provided with an output channel, and the output channel is communicated with the balance chamber; a diaphragm center hole is formed in the center of the diaphragm, a center ejector rod is arranged below the diaphragm center hole, and an ejector rod tray is fixed to the other end of the center ejector rod. An input channel communicated with the lower valve body is arranged on the main valve body, a reset spring is fixed to the ejector rod tray, a valve element is fixed to the bottom end of the reset spring, a reset cavity is formed in the valve element, and a flow divider matched with the lower valve body is fixed to the valve element. The diaphragm comprises a rubber gasket and a metal gland which are integrally formed, a first sealing ring is arranged on the contact face of the center ejector rod and a diaphragm center hole, a second sealing ring is arranged on a vertical section in the ejector rod tray, and by means of the technical scheme, the pressure reducing valve has the advantages of guaranteeing normal use and improving sealing performance.

Description

Technical Field

[0001] The utility model relates to a filtering pressure reducing valve, in particular to a filtering pressure reducing valve with rapid recovery of flow rate and pressure drop. Background Art

[0002] A pressure reducing valve is a mechanical device that controls system pressure, converting a high-pressure input fluid into a desired lower-pressure output fluid. For example, even if the input fluid pressure increases, the output fluid will be reduced to the set value by adjusting the pressure reducing valve accordingly.

[0003] However, in the existing pressure reducing valve, a metal gland is usually arranged on the rubber gasket, and one end of the spring is connected to the metal gland. However, with the long-term use of the pressure reducing valve, the rubber gasket is easily damaged after repeated stress, which leads to the failure of the seals on both sides of the rubber gasket, thereby affecting the normal use of the pressure reducing valve;

[0004] In addition, as the center push rod pushes the rubber gasket to compress the spring or the spring rebounds to push the center push rod back into place, the center push rod and the push rod tray cannot fit completely together, thereby affecting the sealing of the chamber during the movement of the center push rod, thereby affecting the stability of the pressure in the pressure reducing valve. Utility Model Content

[0005] In order to solve the problems in the related art, the present application provides a filtering pressure reducing valve with rapid recovery of flow and pressure drop, which solves the problems of easy sealing failure and unstable pressure of the pressure reducing valve.

[0006] The technical solution is as follows:

[0007] A filter pressure reducing valve with rapid flow and pressure drop recovery, comprising an upper valve body, a main valve body and a lower valve body connected concentrically in three sections; the upper valve body and the lower valve body are both arranged in an open shape, and the opening ends of the upper valve body and the lower valve body are both facing the main valve body;

[0008] A diaphragm is provided at the top of the main valve body, so that a regulating chamber is formed in the upper valve body above the diaphragm, and a balancing chamber is formed in the main valve body below the diaphragm; an adjusting member is provided in the regulating chamber at the top of the diaphragm, and a sliding chamber is provided in the main valve body below the regulating chamber, and an output channel is provided on the main valve body in communication with the sliding chamber, and the output channel is in communication with the balancing chamber;

[0009] The diaphragm has a central hole at the center, a central push rod slides in the sliding chamber below the central hole, one end of the central push rod passes through the sliding chamber and extends into the balancing chamber, and the top end of the central push rod is adapted to abut against the central hole of the diaphragm, and a "T"-shaped push rod tray is fixed to the other end of the central push rod;

[0010] The main valve body is provided with an input channel connected with the lower valve body, a reset spring is fixed to the bottom of the horizontal section in the push rod tray, a valve core which is slidably matched with the sliding chamber is fixed to the bottom end of the reset spring, a reset chamber which is matched with the vertical section in the push rod tray is provided on the valve core, a diverter which is matched with the lower valve body is fixed to the outer periphery of the valve core, and the diverter and the lower valve body are slidably matched; its characteristic is that the diaphragm includes a rubber gasket and a metal pressure cover which are integrally formed, one end of the metal pressure cover is arranged in the regulating chamber, and the other end of the metal pressure cover is arranged in the balancing chamber through the rubber gasket, a first sealing ring is provided on the contact surface between the center push rod and the center hole of the diaphragm, and a second sealing ring is provided on the vertical section in the push rod tray.

[0011] Through the above technical solution, through the one-piece diaphragm setting, as the central push rod moves upward for a long time to lift the diaphragm and recover, the diaphragm is not easily damaged, so that the diaphragm can still isolate the upper valve body and the main valve body, thereby ensuring the sealing effect in the regulating chamber and the balancing chamber;

[0012] By arranging a first sealing ring at the contact position between the central push rod and the central hole of the diaphragm, the sealing between the main valve and the upper valve body can be ensured, and the leakage of fluid from the central hole of the diaphragm into the regulating chamber can be avoided, thereby ensuring the normal use of the pressure reducing valve;

[0013] By arranging a second sealing ring on the ejector tray, the sealing inside the reset chamber can be ensured when the ejector tray slides along the reset chamber, thereby ensuring the stability of the pressure inside the reset chamber and ensuring the normal use of the pressure reducing valve.

[0014] Preferably, a vent hole is provided on the side end surface of the upper valve body; and the upper valve body is connected to the main valve body via a plurality of bolts.

[0015] Preferably, the adjusting member includes an adjusting rod and an adjusting spring, one end of the adjusting spring is arranged on the top of the metal pressure cover, the other end of the adjusting spring is fixedly connected to the adjusting rod, the other end of the adjusting rod extends out of the upper valve body, and the adjusting rod and the upper valve body are fixedly connected.

[0016] Through the above technical scheme, by adjusting the setting of the adjusting part in the chamber, when the fluid pressure in the pressure reducing valve is large and needs to be reduced, the fluid will exert pressure on the diaphragm, which makes the diaphragm be pushed upward, and the adjusting spring is compressed after being stressed, thereby reducing the pressure of the fluid in the pressure reducing valve; when the pressure of the fluid on the pressure reducing valve is reduced, the spring will rebound, thereby gradually restoring the diaphragm to its original state, and the structure is simple and effectively controls the pressure of the fluid in the pressure reducing valve.

[0017] Preferably, a first annular groove is provided on the valve core outside the reset chamber, the bottom end of the reset spring is arranged in the first annular groove, and the depth of the first annular groove is smaller than the depth of the reset spring.

[0018] Preferably, a first notch and a second notch are concentrically arranged at the top of the main valve body, the diameter of the first notch is larger than the diameter of the second notch, and the first notch is arranged at the top of the second notch, the rubber gasket is arranged in the first notch at the top of the second notch, and the diameter of the rubber gasket is consistent with the diameter of the first notch.

[0019] Preferably, the lower valve body is arranged along the inner wall surface of the main valve body, a second annular groove is provided on the outer periphery of a section of the lower valve body located at the main valve body, and a third sealing ring is provided along the second annular groove.

[0020] In summary, the beneficial effects of a filter pressure reducing valve with rapid flow and pressure drop recovery are:

[0021] 1. Through the one-piece diaphragm setting, as the center push rod moves upward for a long time to lift the diaphragm and restore, the diaphragm is not easy to be damaged, so that the diaphragm can still isolate the upper valve body and the main valve body, thereby ensuring the sealing effect in the regulating chamber and the balancing chamber; by setting a first sealing ring at the contact position between the center push rod and the center hole of the diaphragm, this can ensure the sealing between the main valve and the upper valve body, and avoid the situation where the fluid leaks from the center hole of the diaphragm into the regulating chamber, thereby ensuring the normal use of the pressure reducing valve; by setting a second sealing ring on the push rod tray, during the process of the push rod tray sliding along the reset chamber, the sealing in the reset chamber can be guaranteed, thereby ensuring the stability of the pressure in the reset chamber, thereby ensuring the normal use of the pressure reducing valve.

[0022] 2. By adjusting the setting of the adjusting part in the chamber, when the fluid pressure in the pressure reducing valve is high and needs to be reduced, the fluid will exert pressure on the diaphragm, which makes the diaphragm be pushed upward, and the adjusting spring is compressed after being stressed, thereby reducing the pressure of the fluid in the pressure reducing valve; when the pressure of the fluid on the pressure reducing valve is reduced, the spring will rebound, and the diaphragm will gradually return to its original state. The structure is simple and effectively controls the pressure of the fluid in the pressure reducing valve.

[0023] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0025] Figure 1It is a structural schematic diagram of a filter pressure reducing valve with rapid flow and pressure drop recovery;

[0026] Figure 2 It is a schematic diagram of a half-section structure of a filter pressure reducing valve with rapid flow and pressure drop recovery;

[0027] Figure 3 It is a cross-sectional view of a return spring in a stretched state in a filter pressure reducing valve with rapid flow and pressure drop recovery;

[0028] Figure 4 for Figure 3 A partial enlarged view of the sequence number A;

[0029] In the figure, 1, upper valve body; 2, main valve body; 3, lower valve body; 4, diaphragm; 401, rubber gasket; 402, metal pressure cover; 5, adjusting chamber; 6, balance chamber; 7, adjusting member; 701, adjusting rod; 702, adjusting spring; 8, sliding chamber; 9, output channel; 10, diaphragm center hole; 11, center push rod; 12, push rod tray; 13, input channel; 14, reset spring; 15, valve core; 16, reset chamber; 17, diverter; 18, first sealing ring; 19, second sealing ring; 20, vent; 21, bolt; 22, first annular groove; 23, third sealing ring. DETAILED DESCRIPTION

[0030] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the utility model. Instead, they are only examples of devices and methods consistent with some aspects of the utility model as detailed in the attached claims.

[0031] In a possible embodiment, as shown in the attached Figure 1-4 As shown, a filter pressure reducing valve with rapid flow and pressure drop recovery,

[0032] It comprises three concentrically connected upper valve body 1, main valve body 2 and lower valve body 3; both the upper valve body 1 and the lower valve body 3 are arranged in an open shape, and the opening ends of the upper valve body 1 and the lower valve body 3 are facing the main valve body 2;

[0033] The upper valve body 1 is provided with a vent hole 20 on the side end surface; the upper valve body 1 is connected to the main valve body 2 by a plurality of bolts 21; the top of the main valve body 2 is provided with a diaphragm 4, so that an adjusting chamber 5 is formed in the upper valve body 1 above the diaphragm 4, and a balancing chamber 6 is formed in the main valve body 2 below the diaphragm 4; the adjusting chamber 5 at the top of the diaphragm 4 is provided with an adjusting member 7, and the adjusting member 7 includes an adjusting rod 701 and an adjusting spring 702, one end of the adjusting spring 702 is arranged on the top of the metal pressure cover 402, and the other end of the adjusting spring 702 and the adjusting rod 701 are connected. The regulating rod 701 is fixedly connected, and the other end of the regulating rod 701 extends out of the upper valve body 1, and the regulating rod 701 and the upper valve body 1 are fixedly connected; when the fluid pressure in the pressure reducing valve is large and needs to be reduced, the fluid will exert pressure on the diaphragm 4, which makes the diaphragm 4 be pushed upward, and the regulating spring 702 is compressed after being stressed, thereby reducing the pressure of the fluid in the pressure reducing valve; when the pressure of the fluid on the pressure reducing valve is reduced, the spring will rebound, thereby causing the diaphragm 4 to gradually return to its original state. The structure is simple and effectively controls the pressure of the fluid in the pressure reducing valve.

[0034] A sliding chamber 8 is provided in the main valve body 2 below the regulating chamber 5. An output channel 9 is provided on the main valve body 2 and is connected to the sliding chamber 8. The output channel 9 is connected to the balancing chamber 6.

[0035] The diaphragm 4 includes a rubber gasket 401 and a metal pressure cover 402 which are integrally formed. One end of the metal pressure cover 402 is arranged in the regulating chamber 5, and the other end of the metal pressure cover 402 passes through the rubber gasket 401 and is arranged in the balancing chamber 6. A first notch and a second notch are concentrically arranged at the top of the main valve body 2. The diameter of the first notch is greater than the diameter of the second notch, and the first notch is arranged at the top of the second notch. The rubber gasket 401 is arranged in the first notch at the top of the second notch, and the diameter of the rubber gasket 401 is consistent with the diameter of the first notch. As the center push rod 11 moves upward for a long time to lift the diaphragm 4 and then recovers, the integrally formed diaphragm 4 is not easy to be damaged, so that the diaphragm 4 can still isolate the upper valve body 1 and the main valve body 2, thereby ensuring the sealing effect in the regulating chamber 5 and the balancing chamber 6.

[0036] The diaphragm 4 has a diaphragm center hole 10 at the center, and a center push rod 11 slides in the sliding chamber 8 below the diaphragm center hole 10. One end of the center push rod 11 extends through the sliding chamber 8 to the balance chamber 6, and the top of the center push rod 11 is in an adaptive shape against the diaphragm center hole 10. A first sealing ring 18 is provided on the contact surface between the center push rod 11 and the diaphragm center hole 10. The first sealing ring 18 is provided at the contact position between the center push rod 11 and the diaphragm center hole 10, which can ensure the sealing between the main valve and the upper valve body 1, and avoid the situation where the fluid leaks from the diaphragm center hole 10 into the regulating chamber 5, thereby ensuring the normal use of the pressure reducing valve;

[0037] The lower valve body 3 is arranged along the inner wall surface of the main valve body 2, and the outer periphery of the lower valve body 3 of the lower valve body 3 located at the main valve body 2 is provided with a second annular groove, and a third sealing ring 23 is arranged along the second annular groove; the main valve body 2 is provided with an input channel 13 connected with the lower valve body 3; the other end of the central push rod 11 is fixed with a push rod tray 12 in a "T" shape. In this embodiment, the push rod tray 12 is made by a hot pressing molding process, which is simple and fast and can reduce the production cost; a reset spring 14 is fixed to the bottom of the horizontal section of the push rod tray 12, and a valve core 15 that is slidably matched with the sliding chamber 8 is fixed to the bottom end of the reset spring 14, and the valve core 15 is provided with a vertical section in the push rod tray 12 A reset chamber 16 is adapted to the straight section, and a first annular groove 22 is arranged on the valve core 15 outside the reset chamber 16. The bottom end of the reset spring 14 is arranged in the first annular groove 22, and the depth value of the first annular groove 22 is less than the depth value of the reset spring 14; a second sealing ring 19 is arranged on the vertical section of the push rod tray 12; in the process of the push rod tray 12 sliding along the reset chamber 16, the second sealing ring 19 can ensure the sealing of the reset chamber 16, and then ensure the stability of the pressure in the reset chamber 16, thereby ensuring the normal use of the pressure reducing valve; a diverter 17 adapted to the lower valve body 3 is fixed on the outer periphery of the valve core 15, and the diverter 17 and the lower valve body 3 are in sliding cooperation.

[0038] In this specific embodiment, the copper core of the parts in the pressure reducing valve is less than 0.5%, so the pressure reducing valve can be applied to the fine chemical or medical industries.

[0039] Principle of operation: The fluid enters the main valve body 2 from the input channel 13 and enters the lower valve body 3. During this process, the pressure of the fluid applies pressure to the diverter 17 to make it drop. The drop of the diverter 17 drives the valve core 15 to drop synchronously, and then the reset spring 14 is in a stretched state. At this time, the fluid can enter the output channel 9 through the sliding chamber 8. If the pressure of the fluid is within the normal range, the fluid is directly discharged from the output channel 9. When the pressure of the fluid entering the pressure reducing valve is large, a part of the fluid entering the output channel 9 will enter the balancing chamber 6. At this time, the fluid entering the balancing chamber 6 applies upward pressure to the diaphragm 4, and then when the diaphragm 4 is pushed upward, the adjusting spring 702 is compressed after being subjected to force, thereby reducing the pressure of the fluid in the pressure reducing valve. The fluid entering the balancing chamber 6 will also apply pressure to the center push rod 11 to push the reset spring 14 downward, so that the reset spring 14 is stretched, thereby reducing the pressure of the fluid in the pressure reducing valve; as the pressure of the fluid in the pressure reducing valve decreases, the diaphragm 4 will gradually recover, and the adjusting spring 702 will also return to its original state.

[0040] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the utility model herein. This application is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art that are not applicable to the present invention. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present invention are indicated by the appended claims.

[0041] It should be understood that the present invention is not limited to the structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A filter pressure reducing valve with rapid flow and pressure drop recovery, comprising an upper valve body, a main valve body and a lower valve body connected concentrically in three sections; the upper valve body and the lower valve body are both arranged in an open shape, and the opening ends of the upper valve body and the lower valve body are both facing the main valve body; A diaphragm is provided at the top of the main valve body, so that a regulating chamber is formed in the upper valve body above the diaphragm, and a balancing chamber is formed in the main valve body below the diaphragm; an adjusting member is provided in the regulating chamber at the top of the diaphragm, and a sliding chamber is provided in the main valve body below the regulating chamber, and an output channel is provided on the main valve body in communication with the sliding chamber, and the output channel is in communication with the balancing chamber; The diaphragm has a central hole at the center, a central push rod slides in the sliding chamber below the central hole, one end of the central push rod passes through the sliding chamber and extends into the balancing chamber, and the top end of the central push rod is adapted to abut against the central hole of the diaphragm, and a "T"-shaped push rod tray is fixed to the other end of the central push rod; The main valve body is provided with an input channel connected with the lower valve body, a return spring is fixed to the bottom of the horizontal section in the push rod tray, a valve core which is slidably matched with the sliding chamber is fixed to the bottom end of the return spring, a return chamber which is matched with the vertical section in the push rod tray is provided on the valve core, a flow divider which is matched with the lower valve body is fixed to the outer periphery of the valve core, and the flow divider and the lower valve body are slidably matched; it is characterized in that, The diaphragm includes a rubber gasket and a metal pressure cover which are integrally formed, one end of the metal pressure cover is arranged in the adjustment chamber, and the other end of the metal pressure cover passes through the rubber gasket and is arranged in the balance chamber. A first sealing ring is provided on the contact surface between the central push rod and the central hole of the diaphragm, and a second sealing ring is provided on the vertical section of the push rod tray.

2. A filter pressure reducing valve with rapid flow and pressure drop recovery according to claim 1, characterized in that: A vent hole is provided on the side end surface of the upper valve body; the upper valve body is connected to the main valve body through a plurality of bolts.

3. A filter pressure reducing valve with rapid flow and pressure drop recovery according to claim 1, characterized in that: The adjusting member includes an adjusting rod and an adjusting spring, one end of the adjusting spring is arranged on the top of the metal pressure cover, the other end of the adjusting spring is fixedly connected to the adjusting rod, the other end of the adjusting rod extends out of the upper valve body, and the adjusting rod and the upper valve body are fixedly connected.

4. A filter pressure reducing valve with rapid flow and pressure drop recovery according to claim 1, characterized in that: A first annular groove is disposed on the valve core outside the reset chamber, the bottom end of the reset spring is arranged in the first annular groove, and the depth of the first annular groove is smaller than the depth of the reset spring.

5. The filter pressure reducing valve with rapid flow and pressure drop recovery according to claim 1, characterized in that: The top of the main valve body is concentrically provided with a first notch and a second notch, the diameter of the first notch is larger than the diameter of the second notch, and the first notch is arranged at the top of the second notch, the rubber gasket is arranged in the first notch at the top of the second notch, and the diameter of the rubber gasket is consistent with the diameter of the first notch.

6. A filter pressure reducing valve with rapid flow and pressure drop recovery according to claim 1, characterized in that: The lower valve body is arranged along the inner wall surface of the main valve body, and a second annular groove is arranged on the outer periphery of the lower valve body located at the main valve body, and a third sealing ring is arranged along the second annular groove.

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