CN217354969U

CN217354969U - Alternating valve

Info

Publication number: CN217354969U
Application number: CN202220622734.3U
Authority: CN
Inventors: 李小琴; 高克玄
Original assignee: Shaanxi Globo Mechanical Equipment Co ltd
Current assignee: Shaanxi Globo Mechanical Equipment Co ltd
Priority date: 2022-03-21
Filing date: 2022-03-21
Publication date: 2022-09-02
Anticipated expiration: 2032-03-21

Abstract

The utility model discloses an alternative valve, including valve body and case subassembly, be provided with the valve pocket in the valve body, be provided with A mouth and the R mouth that is linked together with the valve pocket on the valve body. The valve core component comprises a joint in threaded connection with the valve body, a valve sleeve, a valve seat gasket and a valve core which is positioned in the valve sleeve and is movably arranged, and a P port is formed in one end of the joint. The utility model discloses an alternative valve compact structure, sealing performance are reliable, dependable performance, long service life.

Description

Alternating valve

Technical Field

The utility model belongs to relate to colliery hydraulic pressure field, concretely relates to valve in turn.

Background

The alternating valve is one of hydraulic elements widely applied in a hydraulic support control system, and in the hydraulic system of the hydraulic support, when one working cavity of a hydraulic cylinder needs to alternately supply liquid by two liquid inlet pipes, and the two liquid inlet pipes cannot be communicated, the alternating valve needs to be utilized. The existing alternating valve has the disadvantages of complex structure, high failure rate, short service life and easy influence on production.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a compact structure, sealing performance is reliable, the stable performance is reliable, long service life's alternative valve.

In order to achieve the above object, the utility model discloses an alternative valve, including valve body and case subassembly, be provided with the valve pocket in the valve body, be provided with the A mouth and the R mouth that are linked together with the valve pocket on the valve body. The valve core assembly comprises a connector, a valve sleeve, a valve seat gasket and a valve core, wherein the connector is in threaded connection with the valve body, the valve core is positioned in the valve sleeve and can be movably arranged, and a P port is formed in one end of the connector.

This alternation valve, the joint fastening end that is threaded connection with the valve body is outer hexagonal, makes things convenient for the dismouting, and can not damage the joint.

According to the alternating valve, the liquid passing holes at the liquid inlet end of the valve core are uniformly distributed along the circumferential direction, the valve sleeve is uniformly stressed along the circumferential direction, and the service life is prolonged.

According to the alternating valve, the conical surface sealing position of the valve sleeve and the valve core reaches the sealing surface of the valve seat, the thickness of the valve sleeve is uniform, and the strength is ensured. The valve sleeve is uniformly distributed with the liquid passing holes along the circumferential direction, and the valve body is provided with the groove at the liquid passing position, so that all the liquid passing holes of the valve sleeve are communicated with the liquid outlet joint, the strength of the valve sleeve is ensured, and meanwhile, the hydraulic pressure force applied to the valve body is uniformly distributed along the circumferential direction, so that the impact is reduced, and the service life is prolonged.

The alternating valve has the advantages that the conical surface sealing is adopted between the valve sleeve and the valve core and between the valve core and the valve seat, and the sealing is reliable.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the present invention;

FIG. 2 is a schematic view of a hydraulic principle of an embodiment of the present invention;

FIG. 3 is an external view of an embodiment of the present invention;

labeled as: 10. a valve body; 11. a valve cavity; 12. a port A; 13. an R port; 20. a valve core assembly; 21. a joint; 211. a port P; 212. an outer hexagon; 22. a valve housing; 23. a valve core; 24. a valve seat; 25. a valve seat gasket; 26. a spring.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The embodiment of the utility model provides an alternative valve, including valve body 10 and case subassembly 20, be provided with valve pocket 11 in the valve body 10, be provided with the A mouth 12 and the R mouth 13 that are linked together with the valve pocket on the valve body 10. The valve core assembly 20 comprises a joint 21 in threaded connection with the valve body, a valve sleeve 22, a valve seat 24, a valve seat gasket 25, and a valve core 23 which is positioned in the valve sleeve and is movably arranged, wherein a P port 211 is arranged at one end of the joint 21. The other end of the joint 21 is in threaded connection with the valve body 10, and the fastening end of the joint is an outer hexagon 212, so that the joint is convenient to disassemble and assemble and cannot be damaged. The other end of the joint 21 abuts against one end of the valve sleeve 22, the other end of the valve sleeve 22 abuts against the valve seat 24, and the other end of the valve seat 24 is pressed on one side of the valve cavity by a gasket. The joint 21, the valve sleeve 22, the valve seat 24 and the inner wall of the valve body 10 are respectively sealed by O-rings. The valve core 23 is arranged in the valve sleeve 22, and the sealing between the valve core and the valve sleeve 22 adopts conical surface sealing. An inner cavity is formed in one end, close to the joint 21, of the valve core 23 and is communicated with the inner cavity of the joint, and liquid passing holes in the inner cavity of the valve core 23 are uniformly distributed along the circumferential direction. A spring 26 is arranged between the valve core 23 and the valve seat 24, one end of the spring 26 is abutted against a shaft shoulder at the solid end of the valve core 23, and the other end of the spring 26 is abutted against the valve seat 24. After the alternative valve is completely opened, the solid end of the valve core 23 is abutted against the valve seat 24 and sealed by a conical surface. The sealing is reliable. The valve sleeve 22 is uniform in thickness from the conical surface sealing position of the valve sleeve 22 and the valve core 23 to the sealing surface of the valve sleeve 22 and the valve seat 24, and strength is guaranteed. The valve sleeves 22 are communicated with the A port 12 through liquid holes and are uniformly distributed along the circumferential direction. The inner wall of the valve body 10 is provided with a groove at the liquid passing position, so that all the liquid passing holes of the valve sleeve 22 are communicated with the port A12, the strength of the valve sleeve 22 is ensured, meanwhile, the hydraulic pressure applied to the valve body 10 is uniformly distributed along the circumferential direction, the impact is reduced, and the service life is prolonged.

The working principle of the alternating valve is as follows: the valve is provided with a first medium channel and a second medium channel, and the valve core is used for selectively enabling the first medium channel and the second medium channel to be in a conducting state. When the valve core is in a contact and sealing state with the valve sleeve, the first medium channel is interrupted, the second medium channel is conducted, liquid enters the valve cavity from the R port, enters the valve sleeve through the middle channel of the gasket and the valve seat, then passes through the valve sleeve liquid passing hole from the shaft shoulder of the valve core, and then is discharged out of the alternating valve from the A port. When the valve core is separated from the conical surface sealing surface of the valve sleeve, the spring is compressed, the other end of the valve core is in contact sealing with the valve seat, the alternating valve is in an opening state, the second medium channel is interrupted at the moment, and the first medium channel is conducted. Liquid enters the inner cavity of the valve core from the port P, passes through the liquid passing hole of the inner cavity of the valve core, then passes through the liquid passing hole of the valve sleeve, and finally is discharged out of the alternating valve from the port A.

The invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-described manner. Various insubstantial improvements are made by adopting the method conception and the technical proposal of the utility model; or without improvement, the above conception and technical scheme of the utility model can be directly applied to other occasions, all within the protection scope of the utility model.

Claims

1. The alternating valve comprises a valve body and a valve core assembly, and is characterized in that a valve cavity is arranged in the valve body, an A port and an R port which are communicated with the valve cavity are arranged on the valve body, the valve core assembly comprises a joint, a valve sleeve, a valve seat gasket and a valve core, wherein the joint, the valve sleeve, the valve seat and the valve seat gasket are in threaded connection with the valve body, the valve core is positioned in the valve sleeve and can be movably arranged, and a P port is arranged at one end of the joint.

2. The alternating valve of claim 1, wherein: the fastening end of the joint in threaded connection with the valve body is an outer hexagon.

3. The alternating valve of claim 1, wherein: the liquid passing holes at the liquid inlet end of the valve core are uniformly distributed along the circumferential direction.

4. The alternating valve of claim 1, wherein: the valve sleeve and the valve core are in conical surface sealing to the sealing surface of the valve seat, the thickness of the valve sleeve is uniform, the valve sleeve liquid passing holes are uniformly distributed along the circumferential direction, and the valve body is provided with a groove at the liquid passing position, so that all the liquid passing holes of the valve sleeve are communicated with the liquid outlet joint.

5. The alternating valve of claim 1, wherein: the valve sleeve and the valve core, and the valve core and the valve seat are sealed by conical surfaces.