One-way valve with pressure relief function
By integrating a pressure relief function into the one-way valve design, the problems of easy damage and insufficient sealing of one-way valves under high pressure conditions are solved, realizing automatic pressure relief and high-strength connection, which is suitable for environments with frequent vibration or limited space.
Patent Information
- Application Number
- CN202522795084.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-12-30
AI Technical Summary
Existing check valves are prone to damage under high-pressure conditions, and traditional connection methods have insufficient sealing performance, increasing system complexity and cost.
Design a one-way valve with integrated pressure relief function, including a pressure relief port and a pressure relief valve assembly. The input cover and output cover are fixed by ultrasonic welding to ensure sealing. A mounting plate and connecting ring are provided on the valve body to simplify installation.
It enables automatic pressure relief under high-pressure conditions, preventing pipeline damage, reducing system complexity and cost, while improving sealing and shock resistance.
Smart Images
Figure CN223908884U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a check valve, especially a check valve with pressure relief function. BACKGROUND
[0002] Check valve is a basic element commonly used in hydraulic and fluid control system, and its main function is to ensure fluid flowing in a single direction and prevent backflow. The traditional check valve is usually composed of valve body, valve core and spring, when the inlet pressure is higher than the outlet pressure, the valve core opens to allow medium to pass through, when the pressure reverses, the valve core closes under the action of spring or medium reverse force to block the flow. However, in actual working conditions, the system may generate excessive pressure due to pressure impact, temperature change or abnormal operation, if it cannot be released in time, it will cause damage to pipeline, sealing element or valve body itself, and even cause system failure. Therefore, in the prior art, an independent pressure relief valve is usually additionally installed in the pipeline, which not only increases the complexity and space occupation of the system, but also increases the installation and maintenance cost. In addition, the connection between the traditional check valve and the pipeline usually adopts threaded or flange mode, which has the problems of insufficient sealing, complicated assembly steps, weak anti-shock and impact performance, etc., especially in occasions requiring compact layout or high reliability requirements (such as fuel system, lubrication system, etc.), which is particularly prominent. SUMMARY
[0003] The utility model discloses a check valve with pressure relief function, which integrates pressure relief function, has compact structure, reliable sealing and is convenient to install and fix.
[0004] The utility model discloses a check valve with pressure relief function, which integrates pressure relief function, has compact structure, reliable sealing and is convenient to install and fix.
[0005] With the above structure, by independently setting the pressure relief hole and the pressure relief valve assembly on the valve body, the one-way valve has the automatic pressure relief capability while realizing the one-way flow, when the system pressure exceeds the set value, the pressure relief valve assembly is automatically opened to release the excess pressure, preventing air blockage in the pipeline, leaving a gap in the pipeline, avoiding damage to the pipeline or components, without the need for additional installation of pressure relief valves, simplifying the system structure and reducing the cost; the two sides of the valve body are covered by the input cover and the output cover to form a cavity connecting the oil conveying hole and the pressure relief hole, the overall layout is reasonable, the space occupied is small, the mounting plate and the symmetrical connecting ring designed on the outer wall of the valve body are inserted into the fixed ring groove, the assembly and positioning of the input cover and the output cover are accurate and the operation is simple, the fixed sleeve on the outer wall of the input cover and the output cover is fixed on the connecting ring on the valve body through ultrasonic welding to form a high-strength connection, improve the sealing performance, effectively prevent the medium from leaking, avoid the risk of thread loosening or flange leakage, especially suitable for installation environment with frequent vibration or limited space, enhance the shock resistance and durability of the valve body.
[0006] As a preferred, the one-way valve assembly includes a one-way valve seat arranged in the oil conveying hole, the outer wall of the one-way valve seat is clamped with the oil conveying hole, the first wedge-shaped hole is arranged on the side of the one-way valve seat facing the input cover, the other side of the one-way valve seat is provided with a one-way valve frame, the one-way valve core is slidably arranged on the one-way valve frame, the end of the one-way valve core abuts in the first wedge-shaped hole, the one-way valve spring is sleeved on the one-way valve core, and the one-way valve spring pushes the one-way valve core to move to close the first wedge-shaped hole.
[0007] As a preferred, the one-way valve core is provided with a one-way valve rod on the end face of the side facing the output cover, the one-way valve rod is slidably arranged in the one-way valve frame, a limiting block is arranged between the one-way valve core and the one-way valve rod, a sleeve ring is arranged on the end of the side of the one-way valve seat facing the input cover, and the two ends of the one-way valve spring are sleeved on the limiting block and the sleeve ring respectively and abut against the end of the one-way valve core and the one-way valve frame respectively. With the above structure, the one-way valve assembly adopts the structure of the first wedge-shaped hole and the one-way valve spring driving the one-way valve core, cooperates with the guiding design of the limiting block and the sleeve ring to ensure that the one-way valve core opens and closes quickly and seals tightly.
[0008] As a preferred, the pressure relief hole is provided with a pre-buried hole on the side facing the output cover, the diameter of the pre-buried hole is larger than that of the pressure relief hole, and a supporting ring is arranged on the inner wall of the side of the pressure relief hole facing the input cover.
[0009] As preferred, the pressure relief valve assembly comprises a pressure relief valve seat which is clamped in the embedded hole and abuts against the inner end of the embedded hole, the pressure relief valve seat is provided with a second wedge-shaped hole, a rubber ball is arranged in the second wedge-shaped hole, the end face of the side of the support ring towards the pressure relief valve seat is provided with a pressure relief spring which abuts against the rubber ball, and the pressure relief spring pushes the rubber ball to move to close the second wedge-shaped hole.
[0010] As preferred, the input cover and the output cover have the same overall structure, the input cover and the output cover are provided with clamping rings outside the ports of the input port and the output port, the outer side wall of the connecting ring is provided with a sealing groove, and the sealing groove is provided with a sealing ring. With the above structure, the multiple sealing is realized by the sealing ring in the sealing groove, the input cover and the output cover have the same structure, and the part types and the production cost are reduced.
[0011] As preferred, the top end of the connecting ring is in a wedge-shaped structure, and the valve body, the mounting plate and the connecting ring are integrally processed. With the above structure, the structural strength and consistency are enhanced, batch manufacturing and maintenance and replacement are facilitated, and the valve is suitable for various fluid control scenes.
[0012] The utility model discloses have integrated pressure relief function, compact structure, sealed reliable and convenient to install and fix and so on advantage. BRIEF DESCRIPTION OF DRAWINGS
[0013] Fig. 1 It is the structural schematic diagram of the utility model embodiment;
[0014] Fig. 2 It is the structural schematic diagram of the valve body of the utility model;
[0015] Fig. 3 It is the structural schematic diagram of the output cover of the utility model;
[0016] Fig. 4 It is the enlarged view of the one-way valve assembly of the utility model.
[0017] In the diagram: 1. Valve body; 11. Oil inlet; 12. Pressure relief hole; 13. Cavity; 14. Mounting plate; 15. Connecting ring; 16. Embedded hole; 17. Support ring; 18. Sealing groove; 19. Sealing ring; 2. One-way valve assembly; 21. One-way valve seat; 22. First wedge-shaped hole; 23. One-way valve bracket; 24. One-way valve core; 25. One-way valve spring; 26. One-way valve stem; 27. Limiting block; 28. Sleeve ring; 3. Pressure relief valve assembly; 31. Pressure relief valve seat; 32. Second wedge-shaped hole; 33. Rubber ball; 34. Pressure relief spring; 4. Input cover; 41. Input port; 5. Output cover; 51. Output port; 6. Fixing sleeve; 61. Fixing ring groove; 7. Snap-fit ring. Detailed Implementation
[0018] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.
[0019] Example: Figs. 1 to 4 The diagram shows a one-way valve with pressure relief function, comprising a valve body 1, an oil inlet 11, and a pressure relief hole 12. A one-way valve assembly 2 is housed within the oil inlet 11, and a pressure relief valve assembly 3 is housed within the pressure relief hole 12. By independently setting the pressure relief hole 12 and the pressure relief valve assembly 3 on the valve body 1, the one-way valve achieves unidirectional flow while possessing automatic pressure relief capability. When the system pressure exceeds a set value, the pressure relief valve assembly 3 automatically opens to release excessive pressure, preventing air resistance in the pipeline and maintaining a gap in the pipeline to avoid damage to the pipeline or components. No additional pressure relief valve is required, simplifying the system structure and reducing costs.
[0020] The valve body 1 is provided with an input cover 4 and an output cover 5 on both sides, respectively, the input cover 4 and the output cover 5 cover both ends of the valve body 1 and have a cavity 13 communicating with the oil delivery hole 11 and the pressure relief hole 12 between both ends of the valve body 1, the input cover 4 and the output cover 5 cover both sides of the valve body 1, form the cavity 13 communicating with the oil delivery hole 11 and the pressure relief hole 12, the overall layout is reasonable, the occupied space is small, the input cover 4 and the output cover 5 are respectively provided with an input port 41 and an output port 51 corresponding to the oil delivery hole 11, the outer wall of the input cover 4 and the output cover 5 is integrally provided with a fixing sleeve 6, the input cover 4 and the fixing sleeve 6 and the output cover 5 and the fixing sleeve 6 are both formed with a fixing ring groove 61 connected with the valve body 1, the outer wall of the valve body 1 is provided with an installation plate 14 extending outward, the installation plate 14 is symmetrically provided with a connecting ring 15 on both sides, the connecting ring 15 is inserted into the fixing ring groove 61 and is fixed by ultrasonic welding, the installation plate 14 and the symmetrical connecting ring 15 extending outward on the outer wall of the valve body 1 are designed, and the insertion structure of the fixing ring groove 61 is matched, so that the assembly and positioning of the input cover 4 and the output cover 5 are accurate and the operation is simple, the fixing sleeve 6 integrally arranged on the outer wall of the input cover 4 and the output cover 5 is fixed with the connecting ring 15 on the valve body 1 by ultrasonic welding, forming a high-strength connection, improving the sealing performance, effectively preventing medium leakage, avoiding the risk of thread loosening or flange leakage, especially suitable for installation environment with frequent vibration or limited space, and enhancing the shock resistance and durability of the valve body 1.
[0021] The one-way valve assembly 2 comprises a one-way valve seat 21 arranged in the oil delivery hole 11, the outer wall of the one-way valve seat 21 is clamped with the oil delivery hole 11, the one-way valve seat 21 is provided with a first wedge-shaped hole 22 on the side facing the input cover 4 and a one-way valve frame 23 on the other side, the one-way valve frame 23 is slidably provided with a one-way valve core 24, the end of the one-way valve core 24 abuts in the first wedge-shaped hole 22, the one-way valve core 24 is sleeved with a one-way valve spring 25, the one-way valve spring 25 pushes the one-way valve core 24 to move to close the first wedge-shaped hole 22, the one-way valve core 24 is provided with a one-way valve rod 26 on the side end face facing the output cover 5, the one-way valve rod 26 is slidably arranged in the one-way valve frame 23, a limiting block 27 is arranged between the one-way valve core 24 and the one-way valve rod 26, a sleeve joint ring 28 is arranged on the end of the one-way valve seat 21 facing the input cover 4, the two ends of the one-way valve spring 25 are respectively sleeved on the limiting block 27 and the sleeve joint ring 28 and abut with the end of the one-way valve core 24 and the one-way valve frame 23, respectively, the one-way valve assembly 2 adopts the structure of the first wedge-shaped hole 22 and the one-way valve spring 25 driving the one-way valve core 24, cooperates with the guiding design of the limiting block 27 and the sleeve joint ring 28, and ensures that the one-way valve core 24 opens and closes quickly and tightly.
[0022] The pressure relief hole 12 is provided with a pre-buried hole 16 with a larger aperture than the pressure relief hole 12 on the side facing the output cover 5, the inner wall of the side of the pressure relief hole 12 facing the input cover 4 is provided with a support ring 17, the pressure relief valve assembly 3 comprises a pressure relief valve seat 31, the pressure relief valve seat 31 is clamped in the pre-buried hole 16 and abuts the inner end of the pre-buried hole 16, the pressure relief valve seat 31 is provided with a second wedge-shaped hole 32, the second wedge-shaped hole 32 is provided with a rubber ball 33, the end face of the side of the support ring 17 facing the pressure relief valve seat 31 is provided with a pressure relief spring 34 abutting the rubber ball 33, the pressure relief spring 34 pushes the rubber ball 33 to move to close the second wedge-shaped hole 32, the pressure relief valve assembly 3 is formed by the pre-buried hole 16, the support ring 17 and the rubber ball 33 pressed by the pressure relief spring 34, the structure is simple and the pressure relief pressure is adjustable, and the overall response accuracy and reliability of the valve are improved.
[0023] The input cover 4 and the output cover 5 have the same overall structure, the number of parts is reduced, and the production cost is reduced, the input cover 4 and the output cover 5 are provided with clamping rings 7 on the outer side of the input port 41 and the output port 51, the outer side wall of the connecting ring 15 is provided with a sealing groove 18, and the sealing groove 18 is provided with a sealing ring 19, so that multiple sealing is achieved; the top end of the connecting ring 15 is a wedge-shaped structure, the valve body 1, the mounting plate 14 and the connecting ring 15 are integrally machined, the structural strength and consistency are enhanced, batch manufacturing and maintenance and replacement are facilitated, and the connecting ring 15 is suitable for various fluid control scenes.
[0024] The above-described embodiments are only a preferred scheme of the present application, and do not limit the present application in any form, and other variants and modifications are possible without departing from the technical scheme recited in the claims.
Claims
1. A one-way valve with pressure relief function, comprising a valve body (1), an oil delivery hole (11) is arranged in the valve body (1), characterized in that: The valve body (1) is further provided with a pressure relief hole (12), the oil delivery hole (11) is provided with a one-way valve assembly (2), the pressure relief hole (12) is provided with a pressure relief valve assembly (3), the valve body (1) is provided with an input cover (4) and an output cover (5) on both sides, the input cover (4) and the output cover (5) cover both ends of the valve body (1) respectively, and there is a cavity (13) between the input cover (4) and the output cover (5) and both ends of the valve body (1), the cavity (13) communicates the oil delivery hole (11) and the pressure relief hole (12), the input cover (4) and the output cover (5) are provided with an input port (41) and an output port (51) corresponding to the oil delivery hole (11) respectively, the input cover (4) and the output cover (5) are integrally provided with a fixing sleeve (6) on the outer wall, the input cover (4) and the fixing sleeve (6) and the output cover (5) and the fixing sleeve (6) are both formed with a fixing ring groove (61) connected with the valve body (1), the valve body (1) is provided with a mounting plate (14) extending outward on the outer wall, the mounting plate (14) is provided with a connecting ring (15) symmetrically on both sides, the connecting ring (15) is inserted into the fixing ring groove (61) and is fixed by ultrasonic welding.
2. The one-way valve with pressure relief function according to claim 1, characterized in that: The one-way valve assembly (2) comprises a one-way valve seat (21) arranged in the oil delivery hole (11), the outer wall of the one-way valve seat (21) is clamped with the oil delivery hole (11), the one-way valve seat (21) is provided with a first wedge-shaped hole (22) on the side facing the input cover (4) and a one-way valve frame (23) on the other side, the one-way valve frame (23) is slidably provided with a one-way valve core (24), the end of the one-way valve core (24) abuts in the first wedge-shaped hole (22), the one-way valve core (24) is provided with a one-way valve spring (25), the one-way valve spring (25) pushes the one-way valve core (24) to move to close the first wedge-shaped hole (22).
3. The one-way valve with pressure relief function according to claim 2, characterized in that: The one-way valve core (24) is provided with a one-way valve rod (26) on the side end face facing the output cover (5), the one-way valve rod (26) is slidably arranged in the one-way valve frame (23), the one-way valve core (24) and the one-way valve rod (26) are provided with a limiting block (27), the one-way valve seat (21) is provided with a sleeve ring (28) on the end facing the input cover (4), and the two ends of the one-way valve spring (25) are sleeved on the limiting block (27) and the sleeve ring (28) respectively and abut against the end of the one-way valve core (24) and the one-way valve frame (23) respectively.
4. The one-way valve with pressure relief function according to claim 1, characterized in that: The pressure relief hole (12) is provided with a pre-buried hole (16) on the side facing the output cover (5), the diameter of the pre-buried hole (16) is greater than that of the pressure relief hole (12), and the inner wall of the side facing the input cover (4) of the pressure relief hole (12) is provided with a supporting ring (17).
5. The one-way valve with pressure relief function according to claim 4, characterized in that: The pressure relief valve assembly (3) comprises a pressure relief valve seat (31) which is clamped in the embedded hole (16) and abuts the inner end of the embedded hole (16), the pressure relief valve seat (31) is provided with a second wedge-shaped hole (32), the second wedge-shaped hole (32) is provided with a rubber ball (33), the end face of the supporting ring (17) towards the pressure relief valve seat (31) is provided with a pressure relief spring (34) abutting the rubber ball (33), the pressure relief spring (34) pushes the rubber ball (33) to move to close the second wedge-shaped hole (32).
6. The one-way valve with pressure relief function according to claim 1, characterized in that: The input cover (4) and the output cover (5) have the same overall structure, the input cover (4) and the output cover (5) are provided with clamping rings (7) on the outer side of the ports of the input port (41) and the output port (51), the outer side wall of the connecting ring (15) is provided with a sealing groove (18), and the sealing groove (18) is provided with a sealing ring (19).
7. The one-way valve with pressure relief function according to claim 1, characterized in that: The top end of the connecting ring (15) is a wedge-shaped structure, and the valve body (1), the mounting plate (14) and the connecting ring (15) are integrally processed and formed.