CN220910571U

CN220910571U - Pressure reducing valve

Info

Publication number: CN220910571U
Application number: CN202322629217.6U
Authority: CN
Inventors: 苏宗尧; 林淑友; 范云峰; 王荣伟; 赵明祥
Original assignee: Zhejiang Suming Valves Co ltd
Current assignee: Zhejiang Suming Valves Co ltd
Priority date: 2023-09-27
Filing date: 2023-09-27
Publication date: 2024-05-07
Anticipated expiration: 2033-09-27

Abstract

The utility model provides a pressure reducing valve, and belongs to the technical field of valve manufacturing. It has solved current relief pressure valve and has had the filtration scheduling problem. The pressure reducing valve comprises a valve body with a water inlet and a water outlet, a valve seat is arranged in the valve body, the valve seat is provided with a vertically through water through hole, a valve cap is connected with the top thread of the valve body, an adjusting cap is connected with the valve cap thread, a valve core is arranged in the valve body, an adjusting spring is arranged between the adjusting cap and the valve core, the lower end of the valve core penetrates through the water through hole and is fixedly connected with a sealing gasket, the upper end of the valve core is provided with a convex ring which radially protrudes outwards and is sealed on the inner wall of the valve body, the valve core is embedded with a sealing ring I sealed on the inner wall of the valve seat, a water storage cavity is formed between the convex ring and the valve seat, the inner end of the water outlet is provided with a water through hole communicated with the water storage cavity, a tail cap is connected with the bottom thread of the valve body, a reset spring is arranged between the tail cap and the sealing gasket, and the valve body is provided with a filtering structure at the water inlet and/or the valve seat. The utility model has the advantages of simple structure, capability of filtering the medium and the like.

Description

Pressure reducing valve

Technical Field

The utility model belongs to the technical field of valve manufacturing, and particularly relates to a pressure reducing valve.

Background

For pressure control of fluid at the pipeline connection part, a pressure reducing valve is usually arranged at a corresponding position of the pipeline, and the pressure reducing valve balances the toggle of the pressure behind the valve and the spring force through the self adjusting action, so that the pressure behind the valve is kept constant within a certain error range.

For example, chinese patent literature discloses a pressure reducing valve [ application number: 202220177243.2; authorized bulletin number: CN217081565U, it includes valve body subassembly, casing subassembly, opens and close control assembly, diaphragm subassembly, case subassembly and manometer, and casing subassembly is connected from top to bottom with the valve body subassembly, opens and closes control assembly, diaphragm subassembly, case subassembly setting in casing subassembly and valve body subassembly. After liquid enters the valve body, when the liquid reaches the other end through the main valve core of the valve core assembly, the liquid enters the lower part of the diaphragm assembly, upward thrust is generated on the diaphragm, when the thrust is larger than the elastic force of the spring of the opening and closing control assembly, the diaphragm compression spring is pushed to drive the main valve core and the auxiliary valve core of the valve core assembly to move upwards, the main valve core plays a role in closing, so that the pressure behind the valve is reduced, the auxiliary valve core can disconnect and link up the front channel and the rear channel of the valve along with the movement of the main valve core, when the pressure behind the valve is reduced, the thrust for pushing the diaphragm is smaller than the elastic force of the spring, the diaphragm moves downwards, and the opening degree of the main valve core is increased so as to stabilize the pressure behind the valve.

The pressure reducing valve has good stability of pressure regulation, but has complex structure and high manufacturing cost, and can not filter media, so that scaling at the valve core, the first channel and the second channel can be caused, and the using effect is affected.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a pressure reducing valve which has a simple structure and can filter media.

The aim of the utility model can be achieved by the following technical scheme: the utility model provides a relief pressure valve, includes the valve body that has water inlet and delivery port, the valve body in have with the spaced apart disk seat of water inlet and delivery port, the disk seat has the water hole that vertically link up, the disk seat has the upper chamber that communicates in the water inlet and the lower chamber that communicates in the delivery port, the top threaded connection of valve body have the valve cap, valve cap threaded connection have the adjustment cap, be equipped with the case in the valve body, be equipped with adjusting spring between adjustment cap and the case, the lower extreme of case passes the water hole and has linked firmly sealed the pad, its characterized in that, the upper end of case have radial evagination and seal in the bulge loop of valve body inner wall, the case inlay and be equipped with seal in the sealing washer of disk seat inner wall one, bulge loop and disk seat between form the water storage chamber, the inner of delivery port have the water hole that communicates in the water storage chamber, the bottom threaded connection of valve body have the tail cap, tail cap and sealed pad between be equipped with reset spring, the valve body be equipped with filtering structure in water inlet and/or disk seat department.

In the pressure reducing valve, the filtering structure comprises a plurality of filter screens, one end of each filter screen is fixedly connected to a connecting plate, the valve body is provided with a connecting hole communicated with the water inlet, each filter screen penetrates through the connecting hole and separates the inner end of the water inlet from the outer end of the water inlet, a circle of sealing ring surrounding the filter screen is arranged between the valve body and the connecting plate, and the connecting plate is detachably connected with the valve body.

In the above-mentioned pressure reducing valve, the inner wall of the valve body has a groove into which the filter screen is embedded.

In the pressure reducing valve, the connecting plate is a plastic plate, and the connecting plate and one end of each filter screen are injection-molded into an integrated structure.

In the pressure reducing valve, the connecting plate is fixedly connected with the valve body through a plurality of screws.

As another aspect, in the above-mentioned pressure reducing valve, a cylindrical filter screen is disposed between the valve seat and the tail cap, the upper end of the filter screen is embedded in the valve seat, the lower end of the filter screen abuts against a step provided on the tail cap, and the filter screen shields the communication position where the lower cavity is communicated with the water outlet. The filter screen plays a filtering role on the medium, avoids scaling, and when cleaning is needed, the tail cap is screwed out, the filter screen is taken out for cleaning, and the filter screen and the tail cap are reset after cleaning.

In the above-mentioned pressure reducing valve, the outer wall of the convex ring is embedded with a second sealing ring sealed on the inner wall of the valve body, and the end face of the convex ring facing the valve seat is provided with an annular groove.

In the pressure reducing valve, the valve body is provided with a pressure measuring hole communicated with the water outlet, and the pressure measuring hole is connected with a pressure cap in a threaded manner.

In the pressure reducing valve, the lower end of the valve core is in threaded connection with the sealing cap, the sealing gasket is embedded in the end face of the sealing cap, which faces the valve rod, the sealing cap is provided with the limiting part extending into the reset spring, the upper end of the reset spring is abutted against the sealing surface, and the lower end of the reset spring is abutted against the tail cap.

Compared with the prior art, the pressure reducing valve has the advantages of simple structure and good use stability, and the filter structure can filter impurities in the medium, avoid scaling, improve the working stability and prolong the service life.

Drawings

Fig. 1 is a sectional view showing the structure of the pressure reducing valve.

Fig. 2 is a perspective view of the connecting plate and the filter screen in the pressure reducing valve.

In the figure, 1, a valve body; 1a, a water inlet; 1b, a water outlet; 1c, valve seat; 1c1, water holes; 1d, water passing holes; 1e, measuring pressure holes; 2. a valve cap; 3. an adjustment cap; 4. a valve core; 4a, a convex ring; 4a1, an annular groove; 5. an adjusting spring; 6. a sealing gasket; 7. a first sealing ring; 8. a water storage cavity; 9. a tail cap; 10. a return spring; 11. a filter screen; 12. a connecting plate; 13. a seal ring; 14. a second sealing ring; 15. pressing the cap; 16. a sealing cap; 16a, a limiting part.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1 and 2, the pressure reducing valve comprises a valve body 1 with a water inlet 1a and a water outlet 1b, wherein a valve seat 1c for separating the water inlet 1a from the water outlet 1b is arranged in the valve body 1, the valve seat 1c is provided with a vertically through water through hole 1c1, the valve seat 1c is provided with an upper cavity communicated with the water inlet 1a and a lower cavity communicated with the water outlet 1b, the top of the valve body 1 is in threaded connection with a valve cap 2, the valve cap 2 is in threaded connection with an adjusting cap 3, a valve core 4 is arranged in the valve body 1, an adjusting spring 5 is arranged between the adjusting cap 3 and the valve core 4, the lower end of the valve core 4 passes through the water through hole 1c1 and is fixedly connected with a sealing gasket 6, the upper end of the valve core 4 is provided with a convex ring 4a which radially protrudes outwards and is sealed on the inner wall of the valve body 1, a sealing ring 7 sealed on the inner wall of the valve seat 1c is embedded on the valve seat 4, a water storage cavity 8 is formed between the convex ring 4a and the valve seat 1c, the inner end of the water storage cavity 8 is provided with a water through hole 1d communicated with the water through hole 1b, the bottom of the valve body 1 is in threaded connection with a valve cap 9, a reset spring 10 is arranged between the valve cap 9 and the sealing gasket 6 is arranged between the valve cap 9 and the valve seat 1 and the sealing gasket 1 and the water seat 1 is provided at the water inlet 1 and the water inlet 1c or the valve seat 1 c.

The pressure reducing valve omits the prior arrangement of the diaphragm, the first channel and the second channel, so that the structure is simple; the compression amount of the regulating spring 5 can be regulated by rotating the regulating cap 3, namely the elasticity of the regulating spring 5 can be regulated, when the regulating cap is used, a medium can enter the water storage cavity 8 from the water passing hole 1d, the water pressure of the water storage cavity 8 and the elasticity of the reset spring 10 can be balanced with the elasticity of the regulating spring 5, when the pressure of the water outlet 1b is increased, the water pressure of the water storage cavity 8 is increased, the valve core 4 moves upwards, the opening degree between the sealing gasket 6 and the valve seat 1c is reduced, the pressure of the water outlet 1b is reduced, when the pressure of the water outlet 1b is reduced, the water pressure of the water storage cavity 8 is reduced, the valve core 4 moves downwards, the opening degree between the sealing gasket 6 and the valve seat 1c is increased, and the pressure of the water outlet 1b is increased, so that the pressure of the water outlet 1b is kept constant within a certain error range; the medium entering from the water inlet 1a can be filtered by the filtering structure, so that the scale is avoided, the working stability is improved, and the service life is prolonged.

Further, the filtering structure comprises a plurality of filtering screens 11, the filtering screens 11 are stainless steel filtering screens, the number of the filtering screens 11 is determined according to actual conditions, and in the embodiment, the number of the filtering screens 11 is three; one end of each filter screen 11 is fixedly connected to a connecting plate 12, the valve body 1 is provided with a connecting hole penetrating through the water inlet 1a, each filter screen 11 penetrates through the connecting hole and separates the inner end of the water inlet 1a from the outer end of the water inlet 1a, a circle of sealing ring 13 surrounding the filter screen 11 is arranged between the valve body 1 and the connecting plate 12, the sealing ring 13 is embedded in the valve body 1, and the connecting plate 12 is detachably connected with the valve body 1. The sealing ring 13 ensures the tightness between the connecting plate 12 and the valve body 1, and each filter screen 11 filters the medium entering from the water inlet 1a to avoid scaling caused by impurities entering the valve body 1, and when cleaning is needed, the connecting plate 12 is connected with the filter screen 11 to be detached together, so that the cleaning is convenient.

The inner wall of the valve body 1 is provided with a groove for the filter screen 11 to be embedded, so that the filter screen 11 is stably positioned and cannot be deformed due to medium impact, gaps cannot be generated, the filtering effect is good, and the service life is long. The connecting plate 12 is a plastic plate, and the connecting plate 12 and one end of each filter screen 11 are injection-molded into an integrated structure, so that the manufacturing is convenient, the connecting strength of the connecting plate 12 and the filter screens 11 is high, and the service life is long. The connecting plate 12 is fixedly connected with the valve body 1 through a plurality of screws, so that the connecting plate 12 is convenient to assemble and disassemble.

The outer wall of the convex ring 4a is embedded with a second sealing ring 14 sealed on the inner wall of the valve body 1, and the end face of the convex ring 4a facing the valve seat 1c is provided with an annular groove 4a1. The second sealing rings 14 ensure the tightness between the convex rings 4a and the valve body 1, and in the embodiment, the number of the second sealing rings 14 is two so as to play a role of double sealing, and the tightness is good; the annular groove 4a1 increases the stress area of the convex ring 4a, so that the convex ring 4a can quickly respond to the water pressure change of the water storage cavity 8, and the sensitivity of adjusting the pressure of the water outlet 1b is good.

The valve body 1 is provided with a pressure measuring hole 1e communicated with the water outlet 1b, and the pressure measuring hole 1e is in threaded connection with a pressure cap 15. The pressure gauge is convenient to install due to the fact that the pressure measuring holes 1e are formed, the pressure of the water outlet 1b can be conveniently detected, and the use is convenient.

The lower extreme threaded connection of case 4 has sealing cap 16, and sealing cap 16 is inlayed towards the terminal surface of valve rod and is equipped with sealing washer 6, and sealing cap 16 has the spacing portion 16a that stretches into reset spring 10, and reset spring 10's upper end is contradicted in sealed face, and reset spring 10's lower extreme is contradicted in tail cap 9. Thus, the sealing gasket 6 is convenient to install, the reset spring 10 is limited, and the working stability is good.

What is not described in detail in this specification is prior art known to those skilled in the art. The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. The utility model provides a relief valve, includes valve body (1) that has water inlet (1 a) and delivery port (1 b), valve body (1) in have with water inlet (1 a) and the separated disk seat (1 c) of delivery port (1 b), disk seat (1 c) have vertical through water hole (1 c 1), disk seat (1 c) have communicate in the upper chamber of water inlet (1 a) and communicate in the lower chamber of delivery port (1 b), the top screw thread of valve body (1) be connected with valve cap (2), valve cap (2) screw thread be connected with regulating cap (3), be equipped with case (4) in valve body (1), be equipped with regulating spring (5) between regulating cap (3) and case (4), the lower extreme of case (4) is passed through water hole (1 c 1) and is linked firmly sealing pad (6), characterized in that, the upper end of case (4) have radial and seal in the protruding circle (4 a) of valve body (1) inner wall, case (4) inlay and be equipped with seal in one (7) of disk seat (1 c) inner wall, case (4) screw thread be equipped with valve cap (8) and water hole (8) are located between water hole (1 d) and water hole (8), a return spring (10) is arranged between the tail cap (9) and the sealing gasket (6), and a filtering structure is arranged at the water inlet (1 a) and/or the valve seat (1 c) of the valve body (1).

2. The pressure reducing valve according to claim 1, characterized in that the filtering structure comprises a plurality of filter screens (11), one end of each filter screen (11) is fixedly connected to a connecting plate (12), the valve body (1) is provided with a connecting hole penetrating through the water inlet (1 a), each filter screen (11) penetrates through the connecting hole and separates the inner end of the water inlet (1 a) from the outer end of the water inlet (1 a), a sealing ring (13) surrounding the filter screen (11) is arranged between the valve body (1) and the connecting plate (12), and the connecting plate (12) is detachably connected with the valve body (1).

3. A pressure reducing valve according to claim 2, characterized in that the inner wall of the valve body (1) is provided with grooves in which the filter screen (11) is embedded.

4. A pressure reducing valve according to claim 3, wherein the connecting plate (12) is a plastic plate, and the connecting plate (12) and one end of each filter screen (11) are injection-molded into an integral structure.

5. A pressure reducing valve according to claim 4, characterized in that the connecting plate (12) is fixedly connected with the valve body (1) by means of a number of screws.

6. The pressure reducing valve according to claim 1, wherein a cylindrical filter screen (11) is arranged between the valve seat (1 c) and the tail cap (9), the upper end of the filter screen (11) is embedded in the valve seat (1 c), the lower end of the filter screen (11) is abutted against a step of the tail cap (9), and the filter screen (11) shields a communicating position of the lower cavity communicated with the water outlet (1 b).

7. A pressure reducing valve according to any one of claims 1 to 6, wherein the outer wall of the flange (4 a) is embedded with a second sealing ring (14) sealed on the inner wall of the valve body (1), and the end surface of the flange (4 a) facing the valve seat (1 c) is provided with an annular groove (4 a 1).

8. The pressure reducing valve according to claim 7, wherein the valve body (1) is provided with a pressure measuring hole (1 e) communicated with the water outlet (1 b), and the pressure measuring hole (1 e) is in threaded connection with a pressure cap (15).

9. The pressure reducing valve according to claim 8, wherein the lower end of the valve core (4) is in threaded connection with a sealing cap (16), the end face of the sealing cap (16) facing the valve rod is embedded with a sealing gasket (6), the sealing cap (16) is provided with a limiting part (16 a) extending into the return spring (10), the upper end of the return spring (10) is abutted against the sealing surface, and the lower end of the return spring (10) is abutted against the tail cap (9).