Durable check valve
By introducing blind holes, flow channels, bushings, and conical heads into the check valve, the problems of easy wear and vibration in traditional check valves are solved, achieving a more durable fluid control effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG GAODIAN VALVE CO LTD
- Filing Date
- 2025-07-01
- Publication Date
- 2026-05-15
AI Technical Summary
Traditional check valves are prone to wear during rapid opening and closing, and the valve disc is prone to oscillation when faced with fluid pressure fluctuations, resulting in a short service life. High-pressure transient waves may also damage the piston assembly.
A check valve structure including a valve body, valve core, retaining ring, water storage chamber, and spring chamber was designed. Through components such as blind holes, flow guide channels, bushings, and conical heads, fluid pressure changes are buffered, valve core vibration and wear are reduced, and rapid closure is ensured.
It effectively reduces valve core vibration and wear, improves the durability of the check valve, prevents leakage, extends service life, and adapts to high-pressure environments.
Smart Images
Figure CN224245547U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of check valve technology, and more specifically to a durable check valve. Background Technology
[0002] Currently, existing check valves are devices used to control the unidirectional flow of fluids, mainly composed of a valve body, a valve disc, and a biasing element (such as a spring). The valve body has an inlet and an outlet, connected by an internal flow channel. The valve core can move within the flow channel, achieving fluid blocking or conduction through a sealing fit with the valve body. The biasing element keeps the valve core in the closed position. When the fluid pressure at the inlet exceeds the opening pressure, the valve disc opens, and the fluid flows to the outlet; when the pressure is insufficient or backflow occurs, the valve disc closes under the action of biasing force or reverse pressure.
[0003] However, the aforementioned existing technologies still have some drawbacks. During operation, the internal components of traditional check valves are prone to wear due to vibrations caused by rapid opening and closing. Furthermore, when fluid pressure fluctuates, the valve disc tends to oscillate rapidly between the open and closed positions, leading to premature wear of internal components such as the valve disc, spring, and valve seat, thus shortening their service life. In addition, when faced with high-pressure transient waves, traditional check valves may experience damage caused by the piston assembly violently impacting internal components. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the present invention provides a durable check valve.
[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes a valve body and a valve core. The valve body includes a through valve cavity, an inlet, and an outlet. The valve cavity is adapted to the valve core, and the valve core can move axially along the valve cavity. The valve core includes a front end, a protrusion, and a tail end. The protrusion near the middle of the valve core divides the valve core into a front end and a tail end. The tail end has a blind hole along its axial direction. The side of the front end is provided with a side opening A connecting the blind hole, and the side opening A is near the front end. The valve cavity is provided with a retaining ring, which divides the valve cavity into a front cavity adapted to the front end and a rear cavity for the protrusion to move. A water storage cavity and a spring cavity with a spring are formed between the inner walls of the protrusion and the rear cavity. The water storage cavity is provided with a water inlet guide channel.
[0006] The present invention is further configured such that the flow guiding channel is connected to the water inlet.
[0007] The present invention is further configured such that: a bushing is provided in the front cavity, and a sealing ring is provided on the retaining ring.
[0008] The present invention is further configured such that: the tail end of the core is provided with a tail end opening B for connecting the spring cavity.
[0009] The present invention is further configured such that a tapered head is provided at the end of the valve core.
[0010] The present invention is further configured such that: the valve body is provided with an installation cavity near the water inlet, a gasket is provided in the installation cavity, and the conical head is provided with a protrusion edge that is compatible with the gasket.
[0011] In summary, this utility model has the following beneficial effects: the side opening A connects to the blind hole, allowing the fluid to be discharged stably, reducing the generation of turbulence, reducing vibration during valve core movement, and the water storage chamber can buffer the pressure changes of the fluid, reducing the impact of sudden fluid changes on the opening and closing of the valve core, and reducing vibration during movement; the bushing increases the wear resistance of the end face, and the tail opening B connects the outlet and the spring cavity, allowing the valve core to close quickly during reverse flow, preventing leakage. Attached Figure Description
[0012] Figure 1 This is a cross-sectional view of this embodiment;
[0013] Figure 2 This is a magnified view of part A in this embodiment;
[0014] Figure 3 This is a magnified view of part B in this embodiment;
[0015] Figure 4 This is a schematic diagram of the water inlet not being connected in this embodiment;
[0016] Figure 5 This is a schematic diagram of the water inlet conduction state in this embodiment;
[0017] Figure 6 This is a schematic diagram of the reverse flow state in this embodiment;
[0018] Reference numerals: 1. Valve body; 11. Valve cavity; 111. Front cavity; 1111. Bushing; 112. Rear cavity; 12. Inlet; 121. Mounting cavity; 13. Outlet; 14. Retaining ring; 141. Sealing ring; 15. Flow guide channel; 2. Valve core; 21. Core front end; 211. Side opening A; 212. Conical head; 2121. Protrusion edge; 22. Protrusion; 23. Core tail end; 231. Blind hole; 232. Tail end opening B; 3. Water storage cavity; 4. Spring cavity; 5. Washer. Detailed Implementation
[0019] The present invention will be further described in detail below with reference to the accompanying drawings.
[0020] This embodiment discloses a durable check valve, such as... Figure 1As shown, the device includes a valve body 1 and a valve core 2. The valve body 1 includes a through valve cavity 11, an inlet 12, and an outlet 13. The valve cavity 11 is adapted to the valve core 2, and the valve core 2 can move axially along the valve cavity 11. The valve core 2 includes a front end 21, a protrusion 22, and a tail end 23. The protrusion 22 near the middle of the valve core 2 divides the valve core 2 into the front end 21 and the tail end 23. The tail end 23 has a blind hole 231 along its axial direction. The side of the front end 21 is provided with a side opening A211 that connects to the blind hole 231. The side opening A211 is near the end of the front end 21. When the fluid flows in the forward direction, the liquid enters from the inlet 12, passes through the side opening A211, and exits from the outlet after passing through the blind hole 231. The blind hole 13 guides the fluid out from the center of the valve core 2, forming a uniform pressure distribution at the tail end 23 of the core, offsetting part of the lateral force generated by the fluid impact, and preventing the valve core 2 from shaking in the open state; the valve cavity 11 is provided with a retaining ring 14, which can block the inflow of liquid, so that the inflow of liquid can only flow out from the blind hole 231, avoiding the generation of turbulence and reducing the vibration of the valve core 2; the retaining ring 14 divides the valve cavity 11 into a front cavity 111 adapted to the front end 21 of the core, and a rear cavity 112 for the protrusion 22 to move. The inner wall between the protrusion 22 and the rear cavity 112 forms a water storage cavity 3 and a spring cavity 4 provided with a spring. The water storage cavity 3 is provided with a water inlet guide channel 15. The water storage chamber 3 is designed to allow the fluid entering through the flow channel 15 to control the valve core 2, thereby assisting in controlling the opening and closing of the valve core 2; the retaining ring 14 is designed to prevent fluid leakage between the front chamber 111 and the water storage chamber 3.
[0021] Further improvements include connecting the flow guide channel 15 to the water inlet. The flow guide channel 15, by adjusting its aperture size, can create a controllable flow obstruction, regulate the pressure transmission rate, and avoid pressure fluctuations caused by high-pressure transient impacts. During forward flow, the channel introduces the inlet pressure into the water storage chamber 3, creating a pressure difference with the outlet pressure received by the spring chamber 4. This pressure difference acts on the protrusion 22, helping to maintain the opening of the valve core 2. Even if the inlet pressure is slightly lower than the traditional opening pressure, frequent opening and closing of the valve core 2 can be avoided.
[0022] like Figure 2 As shown, the front cavity 111 is provided with a bushing 1111, and the retaining ring 14 is fitted with a sealing ring 141. This reduces the direct metal-to-metal contact between the valve core 2 and the cavity wall, thereby reducing wear and extending the service life of the piston and the cavity. As a wear part, the bushing 1111 has a lower replacement cost than the overall valve body maintenance cost, simplifying the maintenance process. The sealing ring 141 effectively blocks fluid leakage and can compensate for changes in the size of the valve seat insert, improving environmental adaptability. The sealing ring 141 can absorb vibrations during the movement of the valve core 2, extending the life of the valve core 2. Furthermore, the frictional resistance generated by the contact between the sealing ring 141 and the valve core 2 increases the energy consumption of the reciprocating motion of the valve core 2, reducing the generation of vibration.
[0023] Furthermore, the valve core 23 is provided with a tail opening B232 connecting to the spring cavity 4. When backflow occurs at the outlet end, the pressure at the outlet 13 is transmitted to the spring cavity 4 through the tail opening B232, forming a closing thrust. This thrust, combined with the spring force, accelerates the valve core 2's return to the closed position. This design avoids the delayed closing or poor sealing caused by backflow pressure in traditional valves, reducing the risk of leakage.
[0024] To further improve the design, a conical head 212 is provided at the end of the valve core 2. When the conical head 212 contacts the inlet 12, it forms an annular line seal. Compared with a planar seal, the contact stress is more concentrated, which can effectively reduce leakage, especially under high pressure differential environment. Moreover, the sliding friction resistance of the conical surface is usually less than that of the planar contact, which extends the life of the seal. In addition, the flow guiding structure of the conical head 212 can suppress the generation of turbulence and reduce the shaking of the valve core 2.
[0025] like Figure 3 As shown, the valve body 1 has a mounting cavity 121 near the inlet 12, and a gasket 5 is disposed in the mounting cavity 121. The conical head 212 is provided with a protrusion 2121 that corresponds to the gasket 5. The fit between the gasket 5 and the protrusion 2121 forms a sealing structure, which can increase the sealing performance of the valve core 2 and prevent leakage. During backflow, the gasket 5 can buffer the impact generated by the closure of the valve core 2, reduce the impact, and increase the service life of the valve core 2.
[0026] Working principle of this utility model
[0027] When flowing in the forward direction, refer to Figures 4 to 5 The liquid in the inlet 12 will pass through the guide channel 15 to fill the water storage chamber 3. The liquid pressure in the water storage chamber 3 can act on the protrusion 22 to help push the valve core 2 to open. Due to the flow limitation of the guide channel 15, the pressure change in the water storage chamber 3 is relatively slow. The sudden pressure wave will not cause obvious fluctuations in the movement state of the valve core 2, thus avoiding vibration caused by pressure fluctuations. When the water storage chamber 3 is not full, the combined effect of the frictional resistance of the sealing ring 141 and the spring force in the spring cavity 4 can also suppress the vibration caused by fluctuations to a certain extent.
[0028] During reflux, refer to Figure 6 The backflowing liquid will fill the spring chamber 4 through the tail opening B232. Under the combined action of the liquid pressure and the spring, the valve core 2 can close quickly.
[0029] The pressure difference between the water storage chamber 3 and the spring chamber 4 can help control the opening and closing of the valve core 2, reducing the impact and vibration of the valve body 1 caused by the turbulent and sudden fluid changes in the pipeline.
[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A durable check valve, comprising a valve body (1) and a valve core (2), wherein the valve body (1) includes a through valve cavity (11), an inlet (12), and an outlet (13), the valve cavity (11) being adapted to the valve core (2), and the valve core (2) being axially movable along the valve cavity (11), characterized in that: The valve core (2) includes a front end (21), a protrusion (22), and a rear end (23). The protrusion (22) near the middle of the valve core (2) divides the valve core (2) into a front end (21) and a rear end (23). The rear end (23) has a blind hole (231) along its axial direction. The side of the front end (21) is provided with a side opening A (211) that connects to the blind hole (231). The side opening A (211) is close to the front end. End (21) end; the valve cavity (11) is provided with a retaining ring (14), the retaining ring (14) divides the valve cavity (11) into a front cavity (111) adapted to the front end (21) of the core, and a rear cavity (112) for the protrusion (22) to move. A water storage cavity (3) and a spring cavity (4) provided with a spring are formed between the inner wall of the protrusion (22) and the rear cavity (112). The water storage cavity (3) is provided with a water inlet guide channel (15).
2. A durable check valve according to claim 1, characterized in that: The flow channel (15) is connected to the water inlet.
3. A durable check valve according to claim 1, characterized in that: The front cavity (111) is provided with a bushing (1111), and the retaining ring (14) is fitted with a sealing ring (141).
4. A durable check valve according to claim 1, characterized in that: The core tail end (23) is provided with a tail end opening B (232) for connecting the spring cavity (4).
5. A durable check valve according to claim 1, characterized in that: The valve core (2) is provided with a tapered head (212) at its end.
6. A durable check valve according to claim 5, characterized in that: The valve body (1) is provided with an installation cavity (121) near the water inlet (12), and a gasket (5) is provided in the installation cavity (121). The conical head (212) is provided with a protrusion edge (2121) that is compatible with the gasket (5).