CN216518928U - Stack formula liquid accuse check valve - Google Patents
Stack formula liquid accuse check valve Download PDFInfo
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- CN216518928U CN216518928U CN202123261142.8U CN202123261142U CN216518928U CN 216518928 U CN216518928 U CN 216518928U CN 202123261142 U CN202123261142 U CN 202123261142U CN 216518928 U CN216518928 U CN 216518928U
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Abstract
The utility model relates to the technical field of hydraulic control one-way valves, in particular to a stacked hydraulic control one-way valve which comprises a valve body, one-way valves arranged on two opposite sides in the valve body, and an oil inlet and an oil outlet arranged in the valve body, wherein the oppositely arranged one-way valves are communicated to form a valve cavity, the valve cavity is respectively communicated with the oil inlet and the oil outlet, a piston is arranged in the valve cavity and can be matched with the inner wall of the valve cavity to move axially, valve seats are respectively arranged on two sides of the valve cavity, a communicating groove is formed in each valve seat, and the oil outlet is communicated with the valve cavity through the communicating groove. The utility model has simple structure, and can realize the functions of low pilot starting pressure and long service life by designing a large hydraulic control ratio and only adjusting the structure and the size of the piston.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to the technical field of hydraulic control one-way valves, in particular to a stacked hydraulic control one-way valve.
[ background of the utility model ]
The pilot operated check valve is a valve which can make the check valve reversely flow by controlling the pressure of fluid. The hydraulic control one-way valve is different from a common one-way valve in that a control oil way is added, when the control oil way is not communicated with pressure oil, the hydraulic control one-way valve works like the common one-way valve, and the pressure oil only flows to an oil outlet from an oil inlet and cannot reversely flow. The prior pilot-operated check valve has large required pilot opening pressure, so that an actuating mechanism generates shaking.
[ Utility model ] content
The utility model aims to provide a superposition type hydraulic control one-way valve which is used for overcoming the defects in the prior art.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a stack formula liquid accuse check valve, includes valve body 2, sets up the check valve 1 of both sides in valve body 2 relatively and sets up oil inlet, the oil-out in valve body 2, its characterized in that: the oppositely arranged check valves 1 are communicated with each other to form a valve cavity, the valve cavity is respectively communicated with the oil inlet and the oil outlet, a piston 3 is arranged in the valve cavity, the piston 3 can be matched with the inner wall of the valve cavity to move axially, valve seats 4 are respectively arranged on two sides of the valve cavity, a communicating groove 41 is formed in each valve seat 4, and the oil outlet is communicated with the valve cavity through the communicating groove 41.
As a further improvement of the utility model, the ratio of the radial diameter b of the piston 3 to the longitudinal width a of the communication groove 41 is in the range of 6-8: 1.
As a further improvement of the utility model, the ratio of the radial diameter b of the piston 3 to the longitudinal width a of the communication groove 41 is in the range of 7-8: 1.
As a further improvement of the utility model, one end of the communicating groove 41 communicated with the valve cavity is in a funnel-shaped structure.
As a further improvement of the utility model, the piston 3 is a symmetrical structure with two conical ends.
As a further improvement of the utility model, a gasket 5 is arranged on the contact surface of the piston 3 and the valve cavity.
Compared with the prior art, the utility model has the beneficial effects that: through the design of large hydraulic control ratio, the movement of the piston and the one-way valve can be pushed only by using lower pilot starting pressure, and the opening and closing control of an oil way is realized. The sealing performance is guaranteed by the gasket arranged between the piston and the valve cavity, and liquid leakage cannot occur even if the valve is used for a long time. Simultaneously, the packing ring also is easily changed, can effectively prolong the life of piston. The utility model has simple structure, and can realize the functions of low pilot starting pressure and long service life only by adjusting the structure and the size of the piston.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of a superposition type pilot-controlled check valve of the utility model.
FIG. 2 is a schematic view of the structure of the check valve of the present invention abutting against the piston
In FIGS. 1-2, 1-one-way valve, 2-valve body, 3-piston, 4-valve seat, 41-communicating groove, 5-gasket, A-oil outlet, B-oil outlet, A1-oil inlet, B1-oil inlet.
[ detailed description ] embodiments
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to fig. 1-2. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. 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.
As shown in fig. 1-2, the stacked hydraulic control check valve provided by the utility model comprises a valve body 2, check valves 1 oppositely arranged on two sides in the valve body 2, and an oil inlet and an oil outlet arranged in the valve body 2. The oppositely arranged check valves 1 are communicated with each other to form a valve cavity, and the valve cavity is respectively communicated with the oil inlet and the oil outlet. A piston 3 is arranged in the valve cavity, the piston 3 can be matched with the inner wall of the valve cavity to move axially, and a gasket 5 is arranged on the contact surface of the piston 3 and the valve cavity. The gasket 5 can increase the sealing performance between the piston 3 and the valve cavity, and avoid the phenomenon of liquid leakage. Over time, the gasket 5 can be replaced in time when the gasket 5 becomes worn and may affect the sealing performance. The gasket 5 has a protective effect on the piston 3, and the service life of the piston 3 is prolonged. The piston 3 is a symmetrical structure with two conical ends, an inclined plane with a flow guiding function is formed between the middle part and the left end part and the right end part of the piston 3, and the inclined plane is matched with the conical structure to increase the stress of the piston 3. Valve seats 4 are respectively arranged on two sides of the valve cavity, a communicating groove 41 is formed in each valve seat 4, and the oil outlet is communicated with the valve cavity through the communicating groove 41. The end of the communicating groove 41 communicated with the valve cavity is of a funnel-shaped structure. The ratio of the radial diameter b of the piston 3 to the longitudinal width a of the communication groove 41 is 7:1, and the design of large hydraulic control ratio can reduce pilot starting pressure.
As a further development of the utility model, the utility model has an open state and a closed state. When the check valve is in a closed state, the valve head of the check valve 1 extends into the communicating groove 41, and the end part of the valve head is tightly connected with the communicating groove 41, so that the valve cavity is not communicated with the oil outlet. When the valve is in an open state, hydraulic oil flows into the valve cavity from the oil inlet A1, the check valve 1 on the left side is opened under the pushing of the fluid pressure, and the piston is pushed to move rightwards; at the moment, hydraulic oil flows out of the oil outlet A, and the oil passages are communicated.
The utility model has simple structure, and can realize the functions of low pilot pressure and long service life by adjusting the structure and the size of the piston and designing the large hydraulic control ratio.
Claims (6)
1. The utility model provides a stack formula pilot operated check valve, includes valve body (2), sets up check valve (1) of both sides in valve body (2) relatively and sets up oil inlet, oil-out in valve body (2), its characterized in that: the check valves (1) which are oppositely arranged are communicated with each other to form a valve cavity, the valve cavity is respectively communicated with the oil inlet and the oil outlet, a piston (3) is arranged in the valve cavity, the piston (3) can be matched with the inner wall of the valve cavity to move axially, valve seats (4) are respectively arranged on two sides of the valve cavity, a communicating groove (41) is formed in each valve seat (4), and the oil outlet is communicated with the valve cavity through the communicating groove (41).
2. The superposition type pilot-operated check valve according to claim 1, wherein: the ratio of the radial diameter b of the piston (3) to the longitudinal width a of the communication groove (41) is in the range of 6-8: 1.
3. The superposition type pilot-operated check valve according to claim 1, wherein: the ratio of the radial diameter b of the piston (3) to the longitudinal width a of the communication groove (41) is in the range of 7-8: 1.
4. The superposition type pilot-operated check valve according to claim 1, wherein: one end of the communicating groove (41) communicated with the valve cavity is of a funnel-shaped structure.
5. The stacked pilot-controlled check valve according to claim 1, wherein: the piston (3) is of a symmetrical structure with two conical ends.
6. The superposition type pilot-operated check valve according to claim 1, wherein: and a gasket (5) is arranged on the contact surface of the piston (3) and the valve cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123261142.8U CN216518928U (en) | 2021-12-23 | 2021-12-23 | Stack formula liquid accuse check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123261142.8U CN216518928U (en) | 2021-12-23 | 2021-12-23 | Stack formula liquid accuse check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216518928U true CN216518928U (en) | 2022-05-13 |
Family
ID=81501442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123261142.8U Active CN216518928U (en) | 2021-12-23 | 2021-12-23 | Stack formula liquid accuse check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216518928U (en) |
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2021
- 2021-12-23 CN CN202123261142.8U patent/CN216518928U/en active Active
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