CN113357413A

CN113357413A - Pressure regulating valve

Info

Publication number: CN113357413A
Application number: CN202010143378.2A
Authority: CN
Inventors: 林元阳; 张克鹏
Original assignee: Dunan Environment Technology Co Ltd
Current assignee: Dunan Environment Technology Co Ltd
Priority date: 2020-03-04
Filing date: 2020-03-04
Publication date: 2021-09-07

Abstract

A pressure regulating valve comprises a valve body, a gas tank assembly, a piston assembly and a sleeve, wherein the sleeve is arranged on the valve body, the gas tank assembly comprises a cover cap, the cover cap is arranged at one end, far away from the valve body, of the sleeve, a valve cavity is formed in the valve body, the piston assembly is arranged in the valve cavity, a valve port is formed in the valve body, and the valve port is communicated with the valve cavity; the air box component also comprises a connecting sleeve and a corrugated pipe, one end of the connecting sleeve is arranged in the sleeve, the other end of the connecting sleeve can extend into the valve cavity and is connected with the piston component, the piston component can move in the valve cavity along the axial direction of the pressure regulating valve so as to seal or open the valve port, the corrugated pipe is arranged in the sleeve, and two ends of the corrugated pipe are respectively fixedly connected with the cap and the connecting sleeve. The invention has the advantages that: simple structure, few parts, simple process and low production cost.

Description

Pressure regulating valve

Technical Field

The invention relates to the field of valves, in particular to a pressure regulating valve.

Background

In a piping system, it is necessary to maintain the pressure in the piping system within a certain range by using a pressure regulating valve. Particularly in a refrigeration system, maintaining a constant pressure in the system can prevent the evaporation pressure from fluctuating frequently to maintain the stability of the refrigeration system.

In the prior art, the pressure regulating valve has a complex structure, a plurality of parts and high production cost.

Disclosure of Invention

In order to solve the problems, the invention provides a pressure regulating valve, which adopts the following technical scheme:

a pressure regulating valve comprises a valve body, a gas tank assembly, a piston assembly and a sleeve, wherein the sleeve is arranged on the valve body, the gas tank assembly is partially arranged in the sleeve and is connected with the piston assembly, the gas tank assembly comprises a cover cap, the cover cap is arranged at one end of the sleeve far away from the valve body, a valve cavity is formed in the valve body, the piston assembly is arranged in the valve cavity, a valve port is formed in the valve body, and the valve port is communicated with the valve cavity; the air box component also comprises a connecting sleeve and a corrugated pipe, one end of the connecting sleeve is arranged in the sleeve, the other end of the connecting sleeve can extend into the valve cavity and is connected with the piston component, the piston component can move in the valve cavity along the axial direction of the pressure regulating valve so as to seal or open the valve port, the corrugated pipe is arranged in the sleeve, and two ends of the corrugated pipe are respectively fixedly connected with the cap and the connecting sleeve.

It can be understood that the air box assembly is connected with the piston assembly through the connecting sleeve, the structure is simple and compact, the number of parts is small, the valve cavity plays a role in guiding the movement of the piston assembly, the corrugated pipe is good in movement balance, and the reliability of a product can be improved.

In one embodiment, the bellows is fixedly connected with the cap and the connecting sleeve by welding.

It can be understood that the corrugated pipe is respectively fixed with the cover cap and the connecting sleeve through welding, and the sealing performance of the valve cavity can be improved.

In one embodiment, the piston assembly comprises a piston, a threaded hole is formed in one end, facing the cap, of the piston, and one end of the connecting sleeve is in threaded connection with the threaded hole.

It can be understood that the air box assembly is connected with the piston assembly through only one threaded connection, and the assembly is simple and convenient.

In one embodiment, the piston assembly further comprises a first elastic member, one end of the first elastic member abuts against the piston, and the other end of the first elastic member abuts against the bottom wall of the valve chamber.

It is understood that the first elastic member provides an elastic force for the restoration of the piston.

In one embodiment, a first groove is formed in one end, facing the valve port, of the piston, and a sealing gasket is arranged in the first groove.

It will be appreciated that the use of a gasket provides a soft seal between the piston and the valve port, preventing internal leakage.

In one embodiment, a second groove is formed in a side surface of the sealing gasket facing the valve port, a gasket is arranged in the second groove, and one end of the piston penetrates through the sealing gasket and the gasket, extends into the valve port, and is fixedly connected with the gasket.

In one embodiment, the sealing pad is riveted with the piston, and the gasket is riveted with the sealing pad.

In one embodiment, the air box assembly further comprises an adjusting bolt and a second elastic member, the second elastic member is arranged in the sleeve, one end of the second elastic member is connected with the adjusting bolt, the other end of the second elastic member is connected with the connecting sleeve, and the adjusting bolt is arranged in the cap and is in threaded connection with the cap.

It is understood that the adjusting screw can adjust the pretension of the adjusting spring.

In one embodiment, the pressure regulating valve further comprises a valve cover, the valve body is arranged towards the opening of one end of the sleeve, and the valve cover is arranged at the opening of the valve body.

It will be appreciated that the valve body is open at one end for ease of assembly.

In one embodiment, a sealing element is arranged on the valve cover and abuts against the inner wall of the valve body so that the valve cover is connected with the valve body in a sealing mode.

It will be appreciated that the seal prevents leakage from the pressure regulating valve.

Compared with the prior art, the pressure regulating valve provided by the invention has the advantages that the air box assembly is directly connected with the piston assembly, the piston assembly can move along the axial direction of the pressure regulating valve to seal or open the valve port, the structure is simple, the air box assembly comprises the corrugated pipe, the corrugated pipe is good in contraction or expansion balance and shock resistance, the service life of the pressure regulating valve can be prolonged, and the two ends of the corrugated pipe are respectively fixedly connected with the cap and the connecting sleeve to enhance the sealing property.

Drawings

FIG. 1 is a schematic structural view of a pressure regulating valve provided in the present invention;

FIG. 2 is an exploded view of a pressure regulator valve provided in accordance with the present invention;

FIG. 3 is a schematic structural view of a gas tank assembly of the pressure regulating valve provided in the present invention;

fig. 4 is a schematic structural diagram of a piston of the pressure regulating valve provided by the present invention.

The symbols in the drawings represent the following meanings:

100. a pressure regulating valve; 10. a valve body; 11. a valve cavity; 111. a stop table; 12. a valve port; 13. an inlet; 14. an outlet; 20. a gas tank assembly; 21. capping; 22. connecting sleeves; 221. a first part; 222. a second section; 23. a bellows; 24. adjusting the bolt; 25. a second elastic member; 30. a piston assembly; 31. a piston; 311. a first stage; 312. a second stage; 312a, a first groove; 312b, a gasket; 312c, a spacer; 312d, a second groove; 313. a third stage; 32. a first elastic member; 40. a sleeve; 50. a valve cover; 51. and a seal.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 4, the pressure regulating valve 100 according to the present invention is installed in a refrigeration system, and is used for maintaining a stable pressure in the refrigeration system and improving the performance of the refrigeration system. For example, installed at an inlet of an evaporator (not shown) for maintaining an evaporation pressure within a certain range, and reducing indoor temperature fluctuation. Of course, in other embodiments, the pressure regulating valve 100 may be installed at other locations within other refrigeration systems, or in other piping systems.

Referring to fig. 1, the pressure regulating valve 100 includes a valve body 10, a gas tank assembly 20, a piston assembly 30 and a sleeve 40, the sleeve 40 is mounted on the valve body 10, the gas tank assembly 20 is partially disposed in the sleeve 40 and connected to the piston assembly 30, the valve body 10 has a valve cavity 11 therein, the piston assembly 30 is disposed in the valve cavity 11, the valve body 10 is opened with a valve port 12, the valve port 12 is communicated with the valve cavity 11, and the piston assembly 30 can move along the axial direction of the pressure regulating valve 100 in the valve cavity 11. It can be understood that the gas tank assembly 20 is directly connected with the piston assembly 30, so that the parts are few, the structure is simple, the process is simple, and the production cost can be reduced.

Furthermore, an inlet 13 and an outlet 14 are opened at two ends of the valve body 10, the inlet 13 and the outlet 14 are respectively communicated with the valve cavity 11, and the medium flows in from the inlet 13 and flows out from the outlet 14. The medium is a refrigerant in the refrigeration system or a medium flowing in other pipeline systems.

Specifically, the air box assembly 20 includes a connection sleeve 22, a bellows 23 and a cap 21, one end of the connection sleeve 22 is disposed in the sleeve 40, the other end of the connection sleeve 22 can extend into the valve cavity 11 and is connected to the piston assembly 30, two ends of the bellows 23 are respectively fixedly connected to the cap 21 and the connection sleeve 22, the cap 21 is covered on one end of the sleeve 40 far away from the valve body 10, the medium from the inlet 13 pushes the piston assembly 30 in a direction far away from the valve port 12, and the valve port 12 is opened. The bellows 23 is well balanced and shock-resistant when contracted or expanded, and can increase the service life of the pressure regulating valve 100.

Preferably, the connection sleeve 22 includes a first portion 221 and a second portion 222, the connection sleeve 22 is disposed toward an opening of one end of the piston assembly 30, one end of the first portion 221, which is far away from the cap 21, penetrates through the opening and can extend into the valve chamber 11, and is in threaded connection with the piston assembly 30, the other end of the first portion is disposed in the sleeve 40, the second portion 222 is disposed in the sleeve 40 and is perpendicular to the first portion 221, two ends of the second portion 222 are fixedly connected with the bellows 23, and an outer diameter of the second portion 222 is larger than a diameter of the opening to limit axial displacement of the connection sleeve 22.

Furthermore, the bellows 23 is fixed to the cap 21 and the connection sleeve 22 by welding, so as to enhance the sealing performance and prevent the leakage of the pressure regulating valve 100.

Referring to fig. 3, the air box assembly 20 further includes an adjusting bolt 24 and a second elastic member 25, the second elastic member 25 is disposed in the sleeve 40 and disposed in the bellows 23, and one end of the second elastic member is abutted against the adjusting bolt 24, and the other end is abutted against the second portion 222 of the connecting sleeve 22. The cap 21 is internally provided with internal threads, the adjusting bolt 24 is provided with external threads, the adjusting bolt 24 is in threaded connection with the cap 21, and the pretightening force of the second elastic piece 25 is adjusted by adjusting the adjusting bolt 24.

Specifically, the adjusting bolt 24 is "T" shaped, and includes a first section of bolt (not labeled in the figure) and a second section of bolt (not labeled in the figure) that are connected to each other, the first section of bolt and the second section of bolt are vertically arranged to form a "T" shaped structure, the peripheral side of the first section of bolt has an external thread, and the second section of bolt is inserted into the second elastic member 25, so that the second elastic member 25 is abutted against the first section of bolt. In the present embodiment, the second elastic member 25 is a cylindrical spring, and in other embodiments, the second elastic member 25 may also be a conical spring or another spring.

Referring to fig. 1, 2 and 4, the piston assembly 30 includes a piston 31, a threaded hole is opened at one end of the piston 31 facing the air box assembly 20, the connecting sleeve 22 has an external thread, the connecting sleeve 22 is in threaded connection with the piston 31 through the threaded hole, the air box assembly 20 and the piston assembly 30 only pass through a threaded connection part, and therefore assembly is simple and parts are few.

Specifically, the piston assembly 30 further includes a first elastic member 32, one end of the first elastic member 32 abuts against the piston 31, and the other end abuts against the bottom wall of the valve chamber 11, and the first elastic member 32 provides a resilient force for resetting the piston 31.

The piston 31 is shaped like a Chinese character 'shi', and includes a first section 311, a second section 312 and a third section 313, wherein the first section 311 is longer than the second section 312 and parallel to the second section 312, the third section 313 connects the first section 311 and the second section 312, one end of the first elastic member 32 is connected with the first section 311, and the other end is sleeved outside the second section 312. In the present embodiment, the first elastic member 32 is a spring, but in other embodiments, the first elastic member 32 may also be a bellows 23 or other elastic member having elasticity.

Furthermore, the second section 312 is provided with a first groove 312a facing the valve port 12, a sealing gasket 312b is arranged in the first groove 312a, one end of the third section 313 penetrates out of the first groove 312a, and the sealing gasket 312b is riveted with the second section 312, so that the structure is simple.

Preferably, the second groove 312d is formed in the sealing gasket 312b, the gasket 312c is disposed in the second groove 312d, the third section 313 is riveted to the sealing gasket 312b through the gasket 312c, the gasket 312c can increase the riveting area, and the sealing gasket 312b is a flexible sealing gasket 312b, so that the impact force on the valve port 12 can be reduced when the piston 31 is reset, and the service life of the pressure regulating valve 100 can be prolonged. Since the sealing pad 312b is flexible, the third segment 313 is connected to the sealing pad 312b by the gasket 312c to increase the firmness. The flexible seal 312b may be a silicone, rubber, or other flexible material seal 312 b.

With continued reference to fig. 1, the pressure regulating valve 100 further includes a valve cover 50, the valve body 10 is disposed toward an opening of the sleeve 40, and the valve cover 50 covers the opening of the valve body 10 to seal the valve chamber 11. In the present embodiment, the valve cap 50 and the sleeve 40 are welded and fixed and sealed, and in other embodiments, the valve cap 50 and the sleeve 40 may be further fixed and sealed by a threaded connection and a sealing ring or other methods.

Further, a stop table 111 is arranged on the valve wall of the valve chamber 11, a sealing member 51 is arranged on the valve cover 50, and the sealing member 51 can abut against the stop table 111 and the valve wall to seal the valve chamber 11 and prevent leakage. In this embodiment, the sealing member 51 is an O-ring, and in other embodiments, the sealing member 51 may also be a boss seal or a shaped seal.

During operation, when the pressure of the medium at the inlet 13 is high, the medium overcomes the elastic forces of the first elastic element 32, the second elastic element 25 and the bellows 23, and the gravity of the piston assembly 30 and the air tank assembly 20, so that the piston 31 is pushed away from the valve port 12, the valve port 12 is opened, and the medium enters the valve cavity 11 and flows out from the outlet 14; when the pressure of the medium at the inlet 13 decreases, the pressure decreases to be less than the pressure at the outlet 14 plus the elastic force of the first elastic member 32, the second elastic member 25 and the bellows 23, and the piston assembly 30 plus the gravity of the gas tank assembly 20 itself, the piston 31 moves toward the valve port 12, thereby changing the medium flow rate at the valve port 12 and decreasing the pressure of the medium at the outlet 14. In the process of moving the piston 31, the corrugated pipe 23 has high contraction or expansion balance and good shock resistance, and the product of the invention has simple structure, convenient processing and low cost.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A pressure regulating valve comprises a valve body (10), a gas tank assembly (20), a piston assembly (30) and a sleeve (40), wherein the sleeve (40) is installed on the valve body (10), the gas tank assembly (20) is partially arranged in the sleeve (40) and connected with the piston assembly (30), the gas tank assembly (20) comprises a cap (21), the cap (21) is arranged at one end, far away from the valve body (10), of the sleeve (40), a valve cavity (11) is formed in the valve body (10), the piston assembly (30) is arranged in the valve cavity (11), a valve port (12) is formed in the valve body (10), and the valve port (12) is communicated with the valve cavity (11);

the valve is characterized in that the air box assembly (20) further comprises a connecting sleeve (22) and a corrugated pipe (23), one end of the connecting sleeve (22) is arranged in the sleeve (40), the other end of the connecting sleeve can extend into the valve cavity (11) and is connected with the piston assembly (30), the piston assembly (30) can move in the valve cavity (11) along the axial direction of the pressure regulating valve to seal or open the valve port (12), the corrugated pipe (23) is arranged in the sleeve (40), and two ends of the corrugated pipe (23) are fixedly connected with the cover cap (21) and the connecting sleeve (22) respectively.

2. Pressure regulating valve according to claim 1, characterized in that the bellows (23) is fixedly connected to the cap (21) and the connecting sleeve (22), respectively, by welding.

3. The pressure regulating valve according to claim 1, wherein the piston assembly (30) comprises a piston (31), one end of the piston (31) facing the cap (21) is provided with a threaded hole, and one end of the connecting sleeve (22) is in threaded connection with the threaded hole.

4. The pressure regulating valve according to claim 3, wherein the piston assembly (30) further comprises a first elastic member (32), one end of the first elastic member (32) abuts against the piston (31), and the other end abuts against the bottom wall of the valve chamber (11).

5. The pressure-regulating valve according to claim 1, wherein a first groove (312a) is opened at one end of the piston (31) facing the valve port (12), and a sealing gasket (312b) is arranged in the first groove (312 a).

6. The pressure-regulating valve according to claim 5, wherein a second groove (312d) is formed in a side surface of the sealing gasket (312b) facing the valve port (12), a gasket (312c) is disposed in the second groove (312d), and one end of the piston (31) penetrates through the sealing gasket (312b) and the gasket (312c), extends into the valve port (12), and is fixedly connected to the gasket (312 c).

7. The pressure regulating valve according to claim 6, wherein the sealing pad (312b) is riveted to the piston (31), and the gasket (312c) is riveted to the sealing pad (312 b).

8. The pressure regulating valve according to claim 1, wherein the air tank assembly (20) further comprises a regulating bolt (24) and a second elastic member (25), the second elastic member (25) is disposed in the sleeve (40), one end of the second elastic member (25) is connected to the regulating bolt (24), the other end is connected to the connecting sleeve (22), and the regulating bolt (24) is disposed in the cap (21) and is in threaded connection with the cap (21).

9. The pressure-regulating valve according to claim 1, further comprising a valve cover (50), wherein the valve body (10) is disposed to be open to one end of the sleeve (40), and the valve cover (50) is disposed to cover the opening of the valve body (10).

10. The pressure-regulating valve according to claim 9, wherein a sealing member (51) is provided on the bonnet (50), and the sealing member (51) abuts against the inner wall of the valve body (10) to hermetically connect the bonnet (50) and the valve body (10).