CN213871688U

CN213871688U - Water hammer eliminating control valve

Info

Publication number: CN213871688U
Application number: CN202021930455.0U
Authority: CN
Inventors: 殷江武; 幸华松
Original assignee: Suzhou Juhan Valve Co ltd
Current assignee: Suzhou Juhan Valve Co ltd
Priority date: 2020-09-07
Filing date: 2020-09-07
Publication date: 2021-08-03
Anticipated expiration: 2030-09-07

Abstract

The utility model discloses a water hammer elimination control valve, which comprises a valve component, wherein the valve component comprises a valve body, a valve cover and a valve seat, a valve body cavity is arranged in the valve body, the valve cover is arranged at the top of the valve body, the valve seat is arranged in the valve body, the water hammer elimination control valve also comprises an induction regulation and control component, the induction regulation and control component is fixed on the valve component, the valve component also comprises an opening and closing component, the lower end of the opening and closing component is embedded with the valve seat, the valve component is closed by embedding the opening and closing component into the valve seat, and the valve component is opened by keeping away from the valve seat through the opening and closing component; the upper end of the opening and closing assembly and the valve cover form a control cavity, and the induction regulating and controlling assembly regulates and controls the pressure between the control cavity and the valve body cavity to enable the opening and closing assembly to be embedded into the valve seat or to be far away from the valve seat. The utility model discloses a control valve is eliminated to water hammer can effectively adjust pipeline water pressure, eliminates the influence of water hammer to pipeline equipment.

Description

Water hammer eliminating control valve

Technical Field

The utility model relates to a valve field, in particular to control valve is eliminated to water hammer.

Background

The water hammer is also called water hammer, and water or other liquid causes sudden change of flow speed and large fluctuation of pressure due to sudden opening or sudden closing of a valve, sudden stop of a water pump, sudden opening and closing of a guide vane and the like in the conveying process. The water hammer effect refers to a serious water hammer generated by water flow impacting a pipeline when a water supply pump is started or stopped.

Because the inner wall of the pipe is smooth inside the water pipe, water flows freely, when the opened valve is suddenly closed or the water supply pump stops, the water flow generates pressure on the valve and the pipe wall, mainly the valve and the pump, and because the pipe wall is smooth, the water power of the subsequent water flow is quickly maximized under the action of inertia and a destructive effect is generated, namely a positive water hammer, namely a water hammer effect in hydraulics; conversely, a water hammer, which is a negative water hammer, is also generated when a closed valve is suddenly opened or a feed pump is started.

Because the instantaneous pressure generated by the water hammer can reach dozens of times or even hundreds of times of the normal working pressure in the pipeline, the large-amplitude pressure fluctuation can cause strong vibration and noise of the pipeline system, possibly damage the valve joint and have great damage effect on the pipeline system. The water hammer effect is extremely disruptive and can cause pipe rupture when the pressure is too high and collapse when the pressure is too low.

Along with the great push of urbanization process, industrial area, municipal administration, building water supply demand are bigger and bigger, and water supply equipment is more and more, but most water supply pipe all have pipeline water hammer influence, pipeline pressure fluctuation change big scheduling problem, cause very big harm to water supply pipe and water supply equipment, seriously influence its life.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the above-mentioned defect among the prior art, provide a control valve is eliminated to water hammer, can effectively adjust pipeline water pressure, eliminate the influence of water hammer to pipeline equipment.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme: a water hammer removal control valve comprises a valve assembly, wherein the valve assembly comprises a valve body, a valve cover and a valve seat, a valve body cavity is arranged in the valve body, the valve cover is arranged at the top of the valve body, the valve seat is arranged in the valve body, the water hammer removal control valve also comprises an induction regulation and control assembly, the induction regulation and control assembly is fixed on the valve assembly, the valve assembly also comprises an opening and closing assembly, the lower end of the opening and closing assembly is embedded with the valve seat, the valve assembly is closed by embedding the opening and closing assembly into the valve seat, and the opening and closing assembly is far away from the valve seat to open the valve assembly; the upper end of the opening and closing assembly and the valve cover form a control cavity, and the induction regulation and control assembly regulates and controls the pressure between the control cavity and the valve body cavity to enable the opening and closing assembly to be embedded in the valve seat or to be far away from the valve seat.

Furthermore, the utility model discloses still include following subsidiary technical scheme:

preferably, the induction regulation and control assembly comprises a pressure regulation module, a pressure induction module and a control center, the pressure induction module and the pressure induction module are respectively connected with the control center, the pressure regulation module is respectively connected with the valve body and the valve cover, the pressure regulation module is communicated with the control cavity and the valve body cavity, the pressure induction module is respectively connected with the pressure regulation module and the water supply pipeline, the pressure induction module detects the pressure of the water supply pipeline and transmits the pressure to the control center, and the control center controls the pressure regulation module to regulate and control the pressure between the control cavity and the valve body cavity.

Preferably, the pressure adjusting module includes: the valve comprises a branch pipeline, a branch pipe ball valve, a filter, a one-way valve and an electromagnetic valve, wherein one end of the branch pipeline is connected with the valve body, the other end of the branch pipeline is connected with the valve cover, the branch pipe ball valve, the filter, the one-way valve and the electromagnetic valve are respectively fixed on the branch pipeline, and the electromagnetic valve is connected with the control center.

Preferably, the pressure sensing module comprises a sensing pipeline, a pressure sensor and a sensing ball valve, one end of the sensing pipeline is connected with the branch pipeline, the other end of the sensing pipeline is connected with the water supply pipeline, the pressure sensor and the sensing ball valve are fixed on the sensing pipeline, and the pressure sensor is connected with the control center.

Preferably, the opening and closing assembly comprises a diaphragm, two ends of the diaphragm are fixed between the valve cover and the valve body, and the diaphragm and the valve cover form the control cavity.

Preferably, the valve body still includes valve import and valve export, the valve body chamber includes import chamber, regulating chamber and export chamber, the disk seat with cavity part between the valve import does the import chamber, the disk seat with cavity part between the diaphragm does the regulating chamber, the disk seat with cavity part between the valve export does the export chamber, the regulating chamber with export chamber intercommunication, when the valve member is opened, the regulating chamber with import chamber intercommunication.

Preferably, the induction regulation and control assembly is used for communicating the control cavity with an inlet cavity, the induction regulation and control assembly is used for communicating the control cavity with an outlet cavity, and the induction regulation and control assembly is used for controlling the opening and closing of the valve assembly by regulating and controlling the pressure between the control cavity and the inlet cavity or the pressure between the control cavity and the outlet cavity.

Preferably, the opening and closing assembly further comprises: the valve rod is respectively movably connected with the valve cover and the valve seat, the upper pressing plate, the diaphragm, the support and the lower pressing plate are sequentially fixed on the valve rod from top to bottom, and the upper pressing plate and the support are arranged on two sides of the diaphragm.

Preferably, the opening and closing assembly further comprises a reset elastic part and a sealing ring, one end of the reset elastic part is fixed on the valve cover, the other end of the reset elastic part is fixed on the upper pressure plate, and the sealing ring is arranged between the support and the lower pressure plate.

Preferably, the diameter of the support is larger than that of the sealing ring, the diameter of the sealing ring is larger than that of the lower pressure plate, and when the valve assembly is in a closed state, the support, the lower pressure plate and the sealing ring tightly abut against the valve seat.

Compared with the prior art, the utility model discloses the advantage lies in:

the utility model is provided with the valve component and the induction regulation and control component, and the induction regulation and control component automatically regulates and controls the opening and closing of the valve component, thereby eliminating pipeline water hammer and prolonging the service life of pipelines, pipe fittings and valves; the opening of the valve component is controlled by regulating the pressure between the control cavity and the cavity of the valve component through the induction regulating component, so that the operation is simple and the maintenance is convenient; through the pressure sensing module, when the water flow fluctuation of the water supply pipeline is large, the pressure sensor rapidly guides the opening of the hole-control electromagnetic valve to open the valve component, the overload water pressure is discharged, and the electromagnetic valve is automatically closed when the pressure is stable in a safe pressure range, so that the constant pressure of the pipeline is ensured.

Drawings

Fig. 1 is a schematic structural view of the water hammer eliminating control valve of the present invention.

Fig. 2 is a schematic structural view of the valve body of the water hammer eliminating control valve of the present invention.

Fig. 3 is a schematic structural view of the valve cover of the water hammer eliminating control valve of the present invention.

Fig. 4 is a schematic view of the valve seat structure of the water hammer eliminating control valve of the present invention.

Fig. 5 is a schematic structural view of the opening and closing assembly of the water hammer eliminating control valve of the present invention.

Fig. 6 is a schematic structural diagram of an induction regulation and control assembly according to an embodiment of the water hammer elimination control valve of the present invention.

Fig. 7 is a schematic structural diagram of an induction regulation and control assembly according to another embodiment of the water hammer suppression control valve of the present invention.

Detailed Description

The following non-limiting detailed description of the present invention is provided in connection with the preferred embodiments and accompanying drawings.

As shown in fig. 1, the water hammer eliminating control valve comprises a valve component 1 and an induction regulating component, wherein the valve component 1 comprises a valve body 2, a valve cover 3, a valve seat 4 and an opening and closing component 5, a valve body cavity 10 is arranged in the valve body 2, the valve cover 3 is arranged at the top of the valve body 2, the valve seat 4 is arranged in the valve body 2, the lower end of the opening and closing component 5 is embedded with the valve seat 4, the valve component 1 is closed by embedding the opening and closing component 5 into the valve seat 4, and the valve component 1 is opened by keeping the opening and closing component 5 away from the valve seat 4; the upper end of the opening and closing component 5 and the valve cover 3 form a control cavity 8, and the induction regulating and controlling component regulates and controls the pressure between the control cavity 8 and the valve body cavity 10 to enable the opening and closing component 5 to be embedded into the valve seat 4 or to be far away from the valve seat 4.

As shown in fig. 1 and 2, the valve body 2 includes a valve body wall 20, a valve inlet 21 and a valve outlet 22, the valve inlet 21 and the valve outlet 22 are disposed on two sides of the valve body wall 20, the valve inlet 21 and the valve outlet 22 are both provided with a flange 23 connected to the main pipe, the valve body wall 20 extends horizontally from the valve inlet 21 to the valve outlet 22, and the valve body wall 20 is hollow to form the valve body cavity 10. The cavity 10 comprises an inlet cavity 11, an outlet cavity 12 and a regulating cavity 13, the cavity part between a valve inlet 21 and a valve seat 4 is the inlet cavity 11, the cavity part between the valve seat 4 and a valve outlet 22 is the outlet cavity 12, the regulating cavity 13 is positioned between the inlet cavity 11 and the outlet cavity 12, the regulating cavity 13 is communicated with the outlet cavity 12, when the valve assembly 1 is opened, the regulating cavity 13 is communicated with the inlet cavity 101, the induction regulating and controlling assembly is used for communicating the control cavity 8 with the inlet cavity 11, the induction regulating and controlling assembly is used for communicating the control cavity 8 with the outlet cavity 12, and the induction regulating and controlling assembly is used for controlling the opening and closing of the valve assembly 1 by regulating and controlling the pressure between the control cavity 8 and the inlet cavity 11 or the pressure between the control cavity 8 and the outlet cavity 12. The valve body wall 20 is provided with a first connector 27 and a second connector 28, the first connector 27 is close to the valve inlet 21, the second connector 28 is close to the valve outlet 22, and the induction regulation and control assembly is connected with the valve body 2 through the first connector 27 and the second connector 28.

The valve body 2 further comprises a supporting platform 24, a supporting wall 25 and a fixing platform 26, the upper end face of the supporting platform 24 is an annular horizontal plane, the supporting platform 24 is fixed on the supporting wall 25, and the valve cover 3 is detachably connected with the supporting platform 24. The support wall 25 is formed in a trumpet shape, the lower end of the support wall 25 is integrally formed with the valve body wall 20, and the upper end is integrally formed with the support table 24. The fixed platform 26 is arranged in the center of the valve body cavity 10, the fixed platform 26 is in a horn shape, the platform wall 260 of the fixed platform 26 and the valve body wall 20 are integrally formed, the fixed platform 2 is provided with a valve port 40, the valve seat 4 is fixed on the fixed platform 26, and the valve seat 4 is partially arranged in the valve port 40.

As shown in fig. 3, the valve cap 3 includes a valve cap body 30, a plug 33, an elastic block 35, and a shaft sleeve 38, the valve cap body 30 is in a cap shape, the valve cap body 30 is provided with a valve rod cavity 32, and the valve rod cavity 32 is a cylindrical cavity. The valve cover body 30 is detachably connected with the support table 24, the valve cover body 30 is provided with a third interface 36 and a fourth interface 37, and the third interface 36 and the fourth interface 37 are arranged on two sides of the valve rod cavity 32. The plug 33 is arranged at the top of the valve rod cavity 32, the shaft sleeve 38 is arranged at the position where the valve rod cavity 32 is communicated with the arch-shaped cavity 31, the elastic block 35 is fixed on the valve cover body 30 and is arranged in the arch-shaped cavity 31, when the valve component 1 is fully opened, the elastic block 35 is contacted with the valve component 5, and the valve component 5 is prevented from impacting the valve cover body 30 to damage the valve cover body 30 and the valve component 5.

As shown in fig. 4, the valve seat 4 includes a base 43, a valve seat wall 44 and a valve seat ring 45, the valve seat wall 44 is hollow and cylindrical, two ends of the valve seat wall 44 are fixedly connected with the base 43 and the valve seat ring 45 respectively, the valve seat wall 44 and the base 43 are arranged in the valve port 40, and the valve seat wall 44 and the fixing base 26 are tightly fitted. The base 44 is provided with a valve rod hole 42 at the center, the base 44 is further provided with a circulation hole 41, the circulation hole 41 is arranged at the two sides of the valve rod hole 42, and the circulation hole 41 is a liquid circulation channel.

As shown in fig. 5, the opening and closing assembly 5 includes a diaphragm 50, the diaphragm 50 is fixed between the valve cover 30 and the support platform 24, the diaphragm 50 and the valve cover 30 form a control chamber 8, the diaphragm 50 supports the wall 25 and the support platform 24 form a regulation chamber 13, and the regulation chamber 13 is a cavity portion between the diaphragm 50 and the valve seat 4.

The opening and closing assembly 5 further comprises a valve rod 51, an upper pressing plate 52, a support 53 and a lower pressing plate 55, the valve rod 51 is movably connected with the valve seat 4 and the valve cover 3, the upper end of the valve rod 51 extends into the valve rod cavity 32, the shaft sleeve 38 is sleeved on the valve rod 51 and circumferentially limits the valve rod 51, the valve rod 51 is movably connected with the shaft sleeve 38, the lower end of the valve rod 51 extends into the inlet cavity, and the valve rod 51 is movably arranged in the valve rod hole 42. The upper pressure plate 52, the diaphragm 50, the bracket 53 and the lower pressure plate 55 are sequentially fixed on the valve rod 51 from top to bottom, the upper pressure plate 52 and the bracket 53 are arranged on two sides of the diaphragm 50, and O-shaped sealing rings 59 are arranged between the upper pressure plate 52 and the valve rod 51 and between the bracket 53 and the valve rod 51.

The opening and closing assembly 5 further includes a return elastic member 56 and a sealing ring 54, wherein one end of the return elastic member 56 is fixed to the upper pressure plate 52, and the other end is fixed to the valve cover body 30. Preferably, the return spring 56 is a spring. The sealing ring 54 is arranged between the bracket 53 and the lower pressure plate 55, the diameter of the bracket 53 is larger than that of the sealing ring 54, and the diameter of the sealing ring 54 is larger than that of the lower pressure plate 55. When the valve assembly 1 is in the closed state, the support 53, the lower pressing plate 55 and the sealing ring 54 are tightly pressed against the valve seat 4, specifically, the lower end surface 530 of the support 53 is tightly pressed against the upper end surface 47 of the valve seat ring 45, the lower annular surface 550 of the lower pressing plate 55 is tightly pressed against the inner wall 46 of the valve seat wall 44, and the sealing ring 54 is tightly pressed against the valve seat wall 44 and the circular arc transition surface 480 of the valve seat ring 45. The opening and closing assembly 5 further comprises an upper limiting piece 57 and a lower limiting piece 58 for limiting the upper pressing plate 52 and the lower pressing plate 55, and the upper limiting piece 57 and the lower limiting piece 58 are detachably connected with the valve rod 51. Preferably, the upper and

lower retainers

57, 58 are nuts.

The response regulation and control subassembly includes pressure regulation module 6, pressure sensing module 7 and control maincenter (not shown), pressure sensing module 7 and pressure sensing module 6 are connected with the control maincenter respectively, pressure regulation module 6 is connected with valve body 2 and valve gap 3 respectively, pressure regulation module 6 intercommunication control chamber 8 and valve body chamber 10, pressure sensing module 7 is connected with pressure regulation module 6 and water supply pipe respectively, pressure sensing module 7 detects the pressure of water supply pipe and transmits for the control maincenter, control maincenter control pressure regulation module 6 regulates and control the pressure between 8 and the valve body chamber 10.

As shown in fig. 6, the pressure regulating module 6 includes a branch pipe, a branch ball valve, a filter 62, a check valve 63, and a solenoid valve 64, one end of the branch pipe is connected to the valve body 2, and the other end is connected to the valve cap 3, the branch pipe includes a first long branch pipe 60, a second long branch pipe 69, and a short branch pipe 67, one end of the first long branch pipe 60 is disposed in the first connector 27, the other end is connected to one end of the second long branch pipe 69, and the other end of the second long branch pipe 69 is disposed in the second connector 28. One end of the short branch pipe 57 is connected in parallel with the first long branch pipe 60 and the second long branch pipe 69, the other end of the short branch pipe 57 is arranged in the third connector 36 or the fourth connector 37, and the connector which is not connected with the short branch pipe 57 is plugged by a plugging piece. The first long branch 60 and the short branch 67 communicate with the control chamber 8 and the inlet chamber 11, and the second long branch 69 and the short branch 67 communicate with the outlet chamber 12 of the control chamber 8. A manifold ball valve, a filter 62, a check valve 63 and a solenoid valve 64 are fixed to the branch pipe. The branch pipe ball valve comprises a first ball valve 61, a second ball valve 66 and a third ball valve 68, wherein the first ball valve 61 is fixed on the first long branch pipe 60, the second ball valve 66 is fixed on the short branch pipe 67, and the third ball valve 68 is fixed on the second long branch pipe 69. A filter 62, a one-way valve 63 and a valve fixed to the first long branch pipe 60. A solenoid valve 94 is fixed to the second long branch 69, and the solenoid valve 94 is connected to the control center. The pressure regulating module 6 also comprises a needle valve 65 fixed to the short branch 67.

The pressure sensing module 7 comprises a sensing pipeline 70, a pressure sensor 71 and a sensing valve 72, one end of the sensing pipeline 70 is connected with the branch pipeline, the other end of the sensing pipeline is connected with the water supply pipeline, the pressure sensor 71 and the sensing valve 72 are fixed on the sensing pipeline 70, the pressure sensor 71 is connected with the control center, the pressure sensor 71 detects the pressure of the water supply pipeline and transmits the pressure to the control center, when the water flow fluctuation of the water supply pipeline is large, the control center rapidly guides the opening of the orifice control electromagnetic valve 64, the control cavity 8 is communicated with the outlet cavity 12, the pressure in the control cavity 8 is discharged into the outlet cavity 12 through the branch pipeline, the pressure in the control cavity 8 is reduced, the valve assembly 1 is opened, and overload; the solenoid valve 64 automatically closes when the pressure stabilizes within the safe pressure range.

As shown in fig. 7, in another example, the pressure regulating module 6 includes: the pressure sensing module 7 comprises a first long branch pipe 60, a second long branch pipe 69, a first branch pipe ball valve 61, a third branch pipe ball valve 68, a filter 62, a one-way valve 63, an electromagnetic valve 64 and a pressure sensing module 7, wherein two ends of the first long branch pipe 60 are respectively arranged in a first connector 27 and a third connector 36, and the first branch pipe ball valve 61, the filter 62 and the one-way valve 63 are fixed on the first long branch pipe 60; both ends of the second long branch pipe 69 are respectively arranged in the second connector 28 and the fourth connector 37, and the third branch pipe ball valve 68 and the solenoid valve 64 are fixed to the second long branch pipe 69. The pressure sensing module 7 comprises a sensing pipeline 70, a pressure sensor 71 and a sensing valve 72, one end of the sensing pipeline 70 is connected with the branch pipeline, the other end of the sensing pipeline is connected with the water supply pipeline, the pressure sensor 71 and the sensing valve 72 are fixed on the sensing pipeline 70, and the pressure sensor 71 and the electromagnetic valve 64 are respectively connected with the control center.

The working pressure of the water hammer eliminating control valve is 0-2.5Mpa, and the lowest adjustable pressure difference range is 0.1 Mpa.

The utility model has the advantages that:

It should be noted that the above-mentioned preferred embodiments are only for illustrating the technical concepts and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention accordingly, and the protection scope of the present invention cannot be limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a control valve is eliminated to water hammer, includes the valve assembly, the valve assembly includes valve body, valve gap and disk seat, the inside valve body chamber that is equipped with of valve body, the valve gap sets up the valve body top, the disk seat sets up inside the valve body, its characterized in that: the water hammer eliminating control valve further comprises an induction regulating and controlling component, the induction regulating and controlling component is fixed on the valve component, the valve component further comprises an opening and closing component, the lower end of the opening and closing component is embedded with the valve seat, the valve component is closed by embedding the opening and closing component into the valve seat, and the valve component is opened by keeping the opening and closing component away from the valve seat; the upper end of the opening and closing assembly and the valve cover form a control cavity, and the induction regulation and control assembly regulates and controls the pressure between the control cavity and the valve body cavity to enable the opening and closing assembly to be embedded in the valve seat or to be far away from the valve seat.

2. The water hammer elimination control valve according to claim 1, wherein the sensing and control assembly includes a pressure adjustment module, a pressure sensing module and a control hub, the pressure sensing module and the pressure sensing module are respectively connected to the control hub, the pressure adjustment module is respectively connected to the valve body and the valve cover, the pressure adjustment module communicates the control chamber with the valve body chamber, the pressure sensing module is respectively connected to the pressure adjustment module and the water supply pipe, the pressure sensing module detects pressure of the water supply pipe and transmits the pressure to the control hub, and the control hub controls the pressure adjustment module to adjust and control pressure between the control chamber and the valve body chamber.

3. The water hammer cancellation control valve of claim 2, wherein the pressure regulation module includes: the valve comprises a branch pipeline, a branch pipe ball valve, a filter, a one-way valve and an electromagnetic valve, wherein one end of the branch pipeline is connected with the valve body, the other end of the branch pipeline is connected with the valve cover, the branch pipe ball valve, the filter, the one-way valve and the electromagnetic valve are respectively fixed on the branch pipeline, and the electromagnetic valve is connected with the control center.

4. The water hammer suppression control valve according to claim 3, wherein the pressure sensing module comprises a sensing pipe, a pressure sensor and a sensing ball valve, one end of the sensing pipe is connected to the branch pipe, the other end of the sensing pipe is connected to the water supply pipe, the pressure sensor and the sensing ball valve are fixed to the sensing pipe, and the pressure sensor is connected to the control hub.

5. The water hammer suppression control valve according to any one of claims 1 to 4, wherein the opening and closing assembly includes a diaphragm, both ends of the diaphragm are fixed between the valve cover and the valve body, and the diaphragm and the valve cover form the control chamber.

6. The water hammer suppression control valve according to claim 5, wherein the valve body further comprises a valve inlet and a valve outlet, the valve body cavity comprises an inlet chamber, a regulation chamber and an outlet chamber, the portion of the cavity between the valve seat and the valve inlet is the inlet chamber, the portion of the cavity between the valve seat and the diaphragm is the regulation chamber, the portion of the cavity between the valve seat and the valve outlet is the outlet chamber, the regulation chamber is in communication with the outlet chamber, and the regulation chamber is in communication with the inlet chamber when the valve assembly is opened.

7. The water hammer cancellation control valve of claim 6, wherein the sensing regulation assembly communicates the control chamber with the inlet chamber, the sensing regulation assembly communicates the control chamber with the outlet chamber, and the sensing regulation assembly controls the opening and closing of the valve assembly by regulating the pressure between the control chamber and the inlet chamber or the pressure between the control chamber and the outlet chamber.

8. The water hammer cancellation control valve of claim 6, wherein the opening and closing assembly further comprises: the valve rod is respectively movably connected with the valve cover and the valve seat, the upper pressing plate, the diaphragm, the support and the lower pressing plate are sequentially fixed on the valve rod from top to bottom, and the upper pressing plate and the support are arranged on two sides of the diaphragm.

9. The water hammer elimination control valve of claim 8, wherein the opening and closing assembly further comprises a return elastic member and a sealing ring, one end of the return elastic member is fixed to the valve cover, the other end of the return elastic member is fixed to the upper pressure plate, and the sealing ring is arranged between the support and the lower pressure plate.

10. The water hammer blow out control valve of claim 9, wherein the diameter of the bracket is greater than the diameter of the seal ring, the diameter of the seal ring is greater than the diameter of the lower pressure plate, and the bracket, the lower pressure plate, and the seal ring are urged against the valve seat when the valve assembly is in the closed state.