Oil return shut-off valve
By setting contact parts and inclination angle design in the oil return circuit breaker, the contact area between the valve core and the oil is increased, the problem of the valve core not being closed in time is solved, and efficient flow rate control and energy saving are achieved.
Patent Information
- Application Number
- CN202422500935.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-10-16
AI Technical Summary
The contact area between the valve core and the return oil in the existing return oil break valve is small, which causes the valve core to be unable to close in time, causing the positive flow oil to merge with the return oil, resulting in energy waste.
The contact parts are arranged in the valve core to increase the contact area between the valve core and the oil, and increase the flow rate through the inclination angle design to ensure that the valve core is opened and closed quickly. The contact parts are made of stainless steel, and the peripheral sealing ring increases connection stability.
It improves the opening and closing efficiency of the valve core, prevents reflow, and reaches 1000ml/min, reduces energy waste and extends service life.
Smart Images
Figure CN223165017U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, in particular to an oil return cut-off valve. Background Art
[0002] The oil return cut-off valve is mainly used in the main circuit of a hydraulic support to make the oil return circuit have a certain back pressure to enhance the action stability of the whole system. The oil return cut-off valve mainly includes components such as a valve body, a valve core, a valve seat, a joint and a spring.
[0003] At present, in the existing oil return cut-off valve, the contact area between the valve core and the return oil is small, and the contact position is close to the position where the valve core abuts against the valve seat. This causes the valve core not to be closed in the first time during return, resulting in some return oil flowing back into the joint and mixing with the forward-flowing oil. The mixing will cause the temperature of the forward-flowing oil to rise, resulting in energy waste. Content of the Utility Model
[0004] The utility model aims to solve the above-mentioned drawbacks of the prior art and provides an oil return cut-off valve to solve the above problems.
[0005] The technical solution adopted by the utility model to solve its technical problems: This kind of oil return cut-off valve includes a valve body and a joint threadedly connected to the liquid inlet end of the valve body. When the valve body and the joint are connected by threads to form an integral body, the liquid inlet end of the joint is the liquid inlet, and the liquid outlet end of the valve body is the liquid outlet. The liquid outlet end of the joint is used as the valve seat. A valve core that abuts against the valve seat is arranged in the valve body. A contact component located at the middle position is arranged in the valve core and increases the contact area between the valve core and the oil during forward or return flow of the oil. A return spring is arranged between the contact component and the valve body.
[0006] Further improvement: The contact component is arranged in a circular shape. It has a through hole and a connecting base surface. The through hole allows the oil to pass through. The valve core has a connecting mating surface that contacts the connecting base surface and the contact component is fixedly arranged in the valve core through welding.
[0007] Further improvement: The contact component also has a forward-flow contact base surface and a return-flow contact base surface. The forward-flow contact base surface contacts the forward-flowing oil, and the return-flow contact base surface abuts against the return spring and is used to contact the return oil.
[0008] Further improvement: Both the forward-flow contact base surface and the return-flow contact base surface have an inclination angle, and the inclination angles of the two are the same. The forward-flow contact base surface makes the inner diameter of the through hole gradually decrease along the forward-flow direction of the forward-flowing oil through the inclination angle. The return-flow contact base surface forms a gap allowing the return oil to enter between it and the connecting mating surface through the inclination angle, and the width of the gap gradually decreases along the return-flow direction of the return oil.
[0009] Further improvement: The contact component is made of stainless steel.
[0010] Further improved, a sealing ring is provided outside the joint, and the sealing ring abuts against the valve body when the joint is connected to the valve body.
[0011] The beneficial effects of the present utility model are as follows:
[0012] 1. By adding a contact component inside the valve core, the present utility model increases the contact position and contact area between the valve core and the oil fluid, so that the opening efficiency of the valve core can be improved when the oil fluid flows forward, and the closing efficiency of the valve core can be improved when the oil fluid flows backward, thereby improving the use effect of preventing backflow;
[0013] 2. The forward-flow contact base surface and the backward-flow contact base surface provided by the contact component of the present utility model both have an inclined angle, and the inclined angles of the two are the same. The inclined angle of the forward-flow contact base surface makes the inner diameter of the through hole gradually decrease along the forward-flow direction of the forward-flow oil fluid, so as to achieve the purpose of increasing the flow rate and enabling the flow rate value to quickly reach 1000 ml / min; the inclined angle of the backward-flow contact base surface also makes the width of the gap gradually decrease along the backward-flow direction of the backward-flow oil fluid while obtaining the gap, so as to achieve the purpose of increasing the flow rate and pushing the valve core to close quickly. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a full-sectional structure schematic diagram of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0015] The present utility model will be further described below with reference to the drawings:
[0016] Referring to the drawings: This oil return cut-off valve includes a valve body 1 and a joint 2 threadedly connected to the liquid inlet end of the valve body 1. When the valve body 1 and the joint 2 are connected by threads to form an integral body, the liquid inlet end of the joint 2 is the liquid inlet 21, and the liquid outlet end of the valve body 1 is the liquid outlet 11. The liquid outlet end of the joint 2 is used as a valve seat 3. A valve core 4 abutted against the valve seat 3 is arranged inside the valve body 1. A contact component 5 located at the middle position and increasing the contact area between the valve core 4 and the oil fluid when the oil fluid flows forward or backward is arranged inside the valve core 4. A return spring 6 is arranged between the contact component 5 and the valve body 1. The principle of the present utility model is that by adding the contact component 5, the contact area between the valve core and the oil fluid is increased, that is, not only the part where the valve core 4 abuts against the valve seat 3 is used as the contact part, so that the opening efficiency of the valve core 4 can be improved when the oil fluid flows forward, enabling the flow rate value to quickly reach 1000 ml / min to meet the operation requirements. When the oil fluid flows backward, the valve core 4 can be closed before the oil fluid reaches the position where the valve core 4 abuts against the valve seat 3, and the closing efficiency of the valve core 4 is also improved, thereby improving the use effect of preventing backflow.
[0017] The contact component 5 is arranged in a loop, and it has a through hole 51 and a connecting base surface 52. The through hole 51 allows the oil fluid to pass through. The valve core 4 has a connecting and mating surface 41 that contacts the connecting base surface 52 and fixes the contact component 5 in the valve core 4 by welding. Such a setting can not only obtain the through hole 51 that allows the oil fluid to pass through, but also realize the connection between the contact component 5 and the valve core 4. At the same time, the forming is convenient, that is, a sheet body with a thickness is used to weld the connected positions after being wound into a loop, which is convenient and fast.
[0018] The contact component 5 also has a forward-flow contact base surface 53 and a return-flow contact base surface 54. The forward-flow contact base surface 53 contacts the forward-flow oil fluid, and the return-flow contact base surface 54 abuts against the return spring 6 and is used to contact the return-flow oil fluid. Such a setting enables the contact component 5 to have parts that contact both the forward-flow oil fluid and the return-flow oil fluid at the same time. Moreover, the loop-shaped setting of the contact component 5 also makes the contact areas provided by the forward-flow contact base surface 53 and the return-flow contact base surface 54 relatively large, which can meet the purpose of sufficient contact, so as to improve the opening or closing efficiency of the valve core 4.
[0019] Both the forward-flow contact base surface 53 and the return-flow contact base surface 54 have an inclination angle, and the inclination angles of the two are the same. The forward-flow contact base surface 53 makes the inner diameter of the through hole 51 gradually decrease along the forward-flow direction of the forward-flow oil fluid through the inclination angle. The return-flow contact base surface 54 forms a gap 7 that allows the return-flow oil fluid to enter between it and the connecting and mating surface 41 through the inclination angle, and the width of the gap 7 gradually decreases along the return-flow direction of the return-flow oil fluid. Such a setting can achieve the purpose of compressing the fluid volume of the oil fluid and increasing the flow rate, that is, achieved through the inclination angle. The inclination angle of the forward-flow contact base surface 53 makes the inner diameter of the through hole 51 gradually decrease along the forward-flow direction of the forward-flow oil fluid, so that the fluid volume of the forward-flow oil fluid when leaving the contact component 5 is smaller than the fluid volume when entering the contact component 5, thereby achieving the purpose of increasing the flow rate, enabling the flow rate value to quickly reach 1000 ml / min, and also facilitating contact with the forward-flow oil fluid to quickly push the valve core 4 to open; the inclination angle of the return-flow contact base surface 54 also makes the width of the gap 7 gradually decrease along the return-flow direction of the return-flow oil fluid while obtaining the gap 7, so that the fluid volume of the return-flow oil fluid when reaching the end of the gap 7 is smaller than the fluid volume when entering the gap 7, thereby achieving the purpose of increasing the flow rate and quickly pushing the valve core 4 to close.
[0020] The contact component 5 is made of stainless steel. Such a setting makes the contact component have high strength, is not easy to be damaged, and has a long service life.
[0021] A sealing ring 8 is arranged outside the joint 2. The sealing ring 8 abuts against the valve body 1 when the joint 2 and the valve body 1 are connected. Such a setting can not only increase the prevention of liquid leakage, but also increase the connection stability between the joint 2 and the valve body 1.
[0022] Although the present utility model has been illustrated and described with reference to the preferred embodiments, those of ordinary skill in the art should understand that various changes in form and detail may be made within the scope of the claims.
Claims
1. An oil return cut-off valve, comprising a valve body (1) and a joint (2) threadedly connected to the liquid inlet end of the valve body (1), characterized in that: When the valve body (1) and the joint (2) are integrally formed by threaded connection, the liquid inlet end of the joint (2) is the liquid inlet (21), the liquid outlet end of the valve body (1) is the liquid outlet (11), the liquid outlet end of the joint (2) is used as the valve seat (3), a valve core (4) abutted against the valve seat (3) is arranged in the valve body (1), a contact member (5) located at the middle position and increasing the contact area between the valve core (4) and the oil liquid during the forward flow or reverse flow of the oil liquid is arranged in the valve core (4), and a return spring (6) is arranged between the contact member (5) and the valve body (1).
2. The oil return cut-off valve according to claim 1, characterized in that: The contact member (5) is arranged in a ring shape and has a through hole (51) and a connecting base surface (52), the through hole (51) allows the oil liquid to pass through, and the valve core (4) has a connecting mating surface (41) that contacts the connecting base surface (52) and the contact member (5) is fixedly arranged in the valve core (4) by welding.
3. The oil return cut-off valve according to claim 2, characterized in that: The contact member (5) further has a forward flow contact base surface (53) and a reverse flow contact base surface (54), the forward flow contact base surface (53) contacts the forward flow oil liquid, and the reverse flow contact base surface (54) abuts against the return spring (6) and is used to contact the reverse flow oil liquid.
4. The oil return shut-off valve according to claim 3, characterized in that: Both the forward flow contact base surface (53) and the reverse flow contact base surface (54) have an inclined angle, and the inclined angles of the two are the same. The forward flow contact base surface (53) makes the inner diameter of the through hole (51) gradually decrease along the forward flow direction of the forward flow oil liquid through the inclined angle, and a gap (7) allowing the reverse flow oil liquid to enter is formed between the reverse flow contact base surface (54) and the connecting mating surface (41) through the inclined angle, and the width of the gap (7) gradually decreases along the reverse flow direction of the reverse flow oil liquid.
5. The oil return cut-off valve according to claim 4, characterized in that: The contact member (5) is made of stainless steel.
6. The oil return cut-off valve according to claim 1, characterized in that: A sealing ring (8) is arranged outside the joint (2), and the sealing ring (8) abuts against the valve body (1) when the joint (2) and the valve body (1) are connected.