CN217381673U

CN217381673U - Flow control valve

Info

Publication number: CN217381673U
Application number: CN202220626369.3U
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Climate and Appliance Controls Group Co Ltd
Current assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Priority date: 2021-11-10
Filing date: 2022-03-22
Publication date: 2022-09-06
Anticipated expiration: 2032-03-22

Abstract

The utility model discloses a flow control valve, valve seat part includes disk seat and sealing member, the sealing member includes supporter and seal, the seal with supporter fixed connection, case part includes the case, the case can for disk seat axial displacement, the case includes annular portion, the lower extreme of annular portion can with the seal butt, the supporter is metal material, the seal is non-metal material, can improve flow control valve's valve reliability of closing.

Description

Flow control valve

Technical Field

The utility model relates to a fluid control technical field especially relates to a flow control valve.

Background

Fig. 1 is a partial schematic structural view of a flow control valve of the background art. The flow control valve comprises a valve body 100, a guide sleeve 200 of a valve core, a valve core 300 and a plastic nut 400, wherein the guide sleeve 200 is arranged in the valve body 100 and is welded and fixed with the valve body 100, the valve core 300 is made of a metal material, a sealing assembly 500 is arranged between the valve core 300 and the guide sleeve 200, the part of the valve core 300, which is positioned at the lower side of the sealing assembly 500, is in sliding fit with the guide sleeve 200, and the valve core 300 can axially slide relative to the guide sleeve 200 under the driving of the nut 400 so as to be abutted to or separated from a sealing piece 700. In the flow rate control valve, the annular flange 1000 of the valve seat 900 includes the valve port 901, the seal member 700 is fitted to the inner sleeve 800, and the inner sleeve 800 is welded to the valve seat 900, and since the valve body 300 made of stainless steel is directly abutted to the seal member 700 made of rubber, the flow rate control valve may leak from the inside of the flow rate control valve due to deformation of the seal member 700 after the flow rate control valve is opened and closed many times.

SUMMERY OF THE UTILITY MODEL

An object of the present application is to provide a flow control valve, the valve closing reliability of which is improved.

The utility model provides a flow control valve, including valve seat part and case part, the valve seat part includes disk seat and sealing member, the sealing member includes supporter and seal, the seal with supporter fixed connection, the case part includes the case, the case can for disk seat axial displacement, the case includes annular portion, the lower extreme of annular portion can with the seal butt, the supporter is metal material, the seal is non-metal material.

Drawings

FIG. 1 is a schematic structural diagram of a flow control valve of the prior art;

FIG. 2 is a schematic illustration of a portion of a flow control valve according to the present application;

FIG. 3 is an enlarged partial schematic view at I of FIG. 1;

FIG. 4 is a schematic cross-sectional view of the sealing member of FIG. 2;

FIG. 5 is a cross-sectional view of the support body of the first member of FIG. 4;

fig. 6 is a cross-sectional view of the limiting member in fig. 2.

Detailed Description

It should be noted that, if the directional terms such as "upper" and "lower" are used herein, they are defined with reference to the position shown in the drawings of the present specification, and it should be understood that the directional terms are used only for clarity and convenience of describing the technical solutions and should not limit the scope of protection.

The term "valve port" as used herein refers to a valve port that determines a flow area of fluid between a first fluid port and a second fluid port when the flow control valve is in a maximum open valve position.

In order to make those skilled in the art better understand the technical solutions of the present application, the following description is made with reference to the accompanying drawings and specific embodiments.

As shown in fig. 2, the flow control valve includes a valve seat member 10, a valve body member 30, and a valve body member 20. The valve body part 30 comprises a valve body 31, the valve body 31 is provided with a second fluid port 40, and a second nipple B extends into the second fluid port 40 and is welded with the valve body 31. The valve seat part 10 includes a valve seat 11, a seal member 12, and a stopper 15. The valve seat 11 and the valve body 31 are welded and fixed, and the limiting member 15 and the valve seat 11 are riveted or welded and fixed. The spool member 20 includes a spool 21, the spool 21 being axially movable with respect to the valve seat 11, the spool 21 including a cylindrical annular portion 211, a lower end of the annular portion 211 being capable of abutting against or separating from the seal member 12.

As shown in fig. 2-5, the seal member 12 as a whole is elastically deformable, so that a sealing engagement is formed when the spool 21 abuts thereto. The sealing member comprises a supporting body and a sealing body, the supporting body is made of metal materials, the sealing body is made of nonmetal materials, the sealing body is fixed on the supporting body, and the annular portion 211 can be abutted against or separated from the sealing body to achieve valve closing or valve opening. By the design, the sealing body is fixed on the supporting body, and compared with the valve core in the background technology, the valve core is completely made of rubber, so that the leakage caused by the deformation of the sealing body after the flow control valve is opened and closed for many times can be improved.

The sealing member 12 includes a first member 121 and a second member 122, where the first member 121 is in a ring shape, where the ring shape means that the first member 121 has an axial through hole when being taken as a part, rather than a solid body, and includes, but is not limited to, a ring, a cylinder, a flanged ring or a cylinder.

The first member 121 includes the aforementioned support body 121A and seal body 121B, the support body 121A includes a cylindrical portion 1210A and a radial flange portion 1210B, and the radial flange portion 1210B projects outward from the cylindrical portion 1210A. The second member 122 is provided separately from the first member 121, the second member 122 is fitted around the outside of the cylindrical portion 1210A, the second member 122 is an elastic body, specifically, an O-ring made of rubber material in the present embodiment, and the second member 122 abuts against the first member 121 and the second member 122 also abuts against the valve seat 11 in the longitudinal direction of the flow rate control valve. With this arrangement, after the flow control valve is opened and closed a plurality of times, the elastic deformation of the second member 122 caused by the valve closing force of the valve body 21 compensates for the deformation of the seal body 121B, and the valve closing reliability of the entire seal member 12 is maintained, thereby improving leakage.

Further, the valve seat 11 includes a first step portion including a first step surface 111 and a first step wall 112, the sealing member 12 is seated on the first step surface 111, an inner wall of the second member 122 is in interference fit with an outer wall of the liner 14, the second member 122 is seated on the first step surface 111, the second member 122 abuts against the first step surface 111, the support body 121A is in clearance fit with the outer wall of the liner 14, and an outer wall of the second member 122 is in clearance fit with the first step wall 112.

The valve seat 11 includes a second step surface 311 and a second step wall 312, the upper end of the first step wall 112 is connected to the second step surface 311, and an axial gap is provided between the first step surface 111 and the lower end of the support body 121A. That is, the axial gap provides a stroke in the axial direction for the first member 121, which is advantageous in that the axial gap can provide a space for deformation of the second member 122, ensuring the sealing reliability of the sealing member.

Specifically, the sealing body 121B is made of plastic, rubber or PTFE, and is formed on the supporting body 121A by injection molding, so that the sealing body is convenient to process and has good wear resistance.

Valve seat component 10 further includes a bushing 14, bushing 14 is ring-shaped, bushing 14 includes a valve port 1400, bushing 14 is riveted or welded to valve seat 11, valve seat 11 includes a first fluid port 50, first fluid port 50 is always communicated with valve port 1400, and a first connection pipe a extends into first fluid port 50 and is welded to valve seat 11. The first fluid port 50 and the valve port 1400 are always communicated with each other, and when the lower end of the annular portion 211 of the valve body 21 abuts against the first member 121, the second fluid port 40 and the valve port 1400 are not communicated with each other (except for the state when the seal is not tight), and when the lower end of the annular portion 211 is separated from the first member 121, the second fluid port 40 and the valve port 1400 are communicated with each other. Sealing member 12 cover is established in the outside of bush 14, bush 14 and disk seat 11 fixed connection, and bush 14 and disk seat 11 carry on spacingly jointly to sealing member 12's circumference to, valve port 1400 forms on bush 14 for the valve port processing is easy, and, set up valve port 1400 on bush 14 (promptly, bush 14 self has valve port 1400), makes whole runner can be more smooth, controls the flow control valve more easily and satisfies the flow curve demand of needs. Furthermore, the valve port 1400 is provided in the bushing 14, which facilitates the serialization of the aperture of the flow control valve (the minimum through flow of the inner hole of the bushing 14), i.e., the aperture and the flow curve of the valve port of the flow control valve can be changed by setting the shape and the size of the inner wall of the bushing 14, without changing the structure and the size of the valve seat 11.

As shown in fig. 2 and 3, the bushing 14 includes a body portion 141 and an upper projection 142 projecting outward along an outer wall of the body portion 141, the upper projection 142 abutting the sealing member 12, specifically, the upper projection 142 pressing against the upper end of the first member 121. The liner 14 further includes a lower projection 143, and the lower projection 143 is rivet-fixed to the valve seat 11. The valve seat component 10 further includes a stopper 15 shown in fig. 6, and the stopper 15 is partially seated on the upper surface of the valve seat 11 and partially located above the first member 121, and restricts the axial separation of the sealing member 12 from the valve seat 11. When the annular portion 211 abuts against the sealing body 121A, the stopper 15 is located outside the annular portion 211, and the upper projection 142 is located inside the annular portion 211. When the flow rate control valve is just opened, that is, when the flow rate control valve is opened to a small degree, the flow rate can be adjusted by the engagement of the annular portion 211 with the stopper 15 and the upper protrusion 142.

The bushing 14 includes a first relief passage, and a wall forming the first relief passage is opposite to the first step surface 111, and in this embodiment, the first relief passage is a through hole opened in a wall portion of the body portion 141 of the bushing 14. The limiting member 15 includes a second pressure relief passage 150, a gap is formed between the first step wall 112 and the sealing member 12, and the second pressure relief passage 150 communicates the gap with a valve cavity of the flow control valve, in this embodiment, the second pressure relief passage 150 is a plurality of through holes penetrating through an upper surface and a lower surface of the limiting member 15. The pressure relief passage is provided so that when the valve is closed, fluid accumulated between the seal member 12 and the valve seat 11 or between the seal member 12 and the bush 14 is released, thereby improving the sealing reliability of the seal member 12.

The flow control valve provided in the present application is described above by way of example. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.

Claims

1. The flow control valve comprises a valve seat component and a valve core component, and is characterized in that the valve seat component comprises a valve seat and a sealing component, the sealing component comprises a supporting body and a sealing body, the sealing body is fixedly connected with the supporting body, the valve core component comprises a valve core, the valve core can axially move relative to the valve seat, the valve core comprises an annular part, the lower end of the annular part can be abutted against the sealing body, the supporting body is made of a metal material, and the sealing body is made of a non-metal material.

2. The flow control valve of claim 1, wherein the sealing body is a plastic or rubber material and is formed on the support body by injection molding.

3. The flow rate control valve according to claim 1 or 2, wherein the seal member includes a first member including the support body and the seal body, and a second member which is an elastic body and is provided separately from the first member, and the second member abuts against the first member and the valve seat in a longitudinal direction of the flow rate control valve.

4. The flow control valve according to claim 3, wherein the valve seat member includes a bush that is riveted or welded to the valve seat, the bush includes a body portion and an upper protruding portion that protrudes outward along an outer wall of the body portion, the valve seat includes a first stepped portion that includes a first stepped surface and a first stepped wall, the second member sheathes the support body, the second member is seated on the first stepped surface, the second member abuts against the first stepped surface, the support body is clearance-fitted to the outer wall of the bush, and the outer wall of the second member is clearance-fitted to the first stepped wall.

5. The flow control valve of claim 4, wherein the valve seat includes a second step surface and a second step wall, an upper end of the first step wall being connected to the second step surface, the first step surface having an axial gap with a lower end of the support body.

6. The flow control valve according to claim 5, wherein the support body includes a cylindrical portion and a radially flanged portion, the radially flanged portion projects outwardly from the cylindrical portion, the seal body covers at least a portion of the radially flanged portion, the seal body is made of PTFE or rubber, the support body is made of a plastic or metal material, and the second member is made of rubber.

7. The flow control valve of claim 4, further comprising a first fluid port and a second fluid port, the bushing includes a valve port, the first fluid port is not in communication with the second fluid port when the annular portion abuts the seal body, the bushing further comprises a lower protruding portion which is riveted and fixed with the valve seat, the valve seat component further comprises a limiting member, when the annular part is abutted against the sealing body, the limiting piece is positioned on the outer side of the annular part, the upper protruding portion is located inside the annular portion, the bushing includes a first pressure relief passage, a wall forming the first pressure relief passage is opposite to the first step surface, the limiting piece comprises a second pressure relief channel, a gap is formed between the first step wall and the outer wall of the sealing component, and the second pressure relief channel is communicated with the gap and the valve cavity of the flow control valve.