Check valve
By designing a rotatable suspended valve disc and limiting table structure, the problem of lax sealing of the swing check valve in low flow rate or pressure-free state is solved, effective sealing and simplified processing at low flow rate or pressure-free state is achieved, and cost is reduced.
Patent Information
- Application Number
- CN202422590693.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-10-25
AI Technical Summary
The existing swing check valves are not tightly sealed when the medium flow rate is low or pressure-free, and there is a risk of reverse flow of the medium and high processing costs.
A check valve is designed, and the valve disc is rotatably suspended from the limit table, and the sealing surface has a preset angle with the vertical direction. It uses gravity to naturally fit the sealing surface at a low flow rate or pressure-free state, and combines the limit table and the annular sealing surface to improve sealing performance and simplify the processing technology.
Effectively prevent media backflow at low flow rates or no pressure, reducing production costs and processing cycles, and improving sealing performance and flow efficiency.
Smart Images
Figure CN223152889U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, in particular to a check valve. Background Art
[0002] A swing check valve is one of the most commonly used check valves, which mainly controls the flow direction of the medium by relying on the rotation of the valve flap around the hinge shaft. When the medium in the pipeline flows forward, the pressure of the medium pushes the valve flap to rotate upward along the hinge shaft, opening the liquid inlet of the valve body and enabling the medium to pass through smoothly; when the medium stops flowing or flows reversely, the valve flap rotates downward under the action of the reverse pressure of the fluid and fits on the sealing surface in the valve cavity, thereby closing the liquid inlet and preventing the medium from flowing back.
[0003] In the existing swing check valve, the sealing surface is parallel to the vertical plane. In the state of low medium flow rate or no pressure, there is a risk that the valve flap cannot be tightly closed and the medium flows reversely. Moreover, the position in the valve cavity for installing the valve flap is formed by precision machining, with a long processing cycle and high processing cost.
[0004] Therefore, there is an urgent need for a check valve to solve the problems in the prior art. Content of the Utility Model
[0005] The purpose of the utility model is to provide a check valve, in which under the state of low medium flow rate or no pressure, the valve flap naturally fits on the sealing surface under the action of gravity to close the liquid inlet joint, improving the sealing performance of the check valve.
[0006] To achieve the above object, the utility model adopts the following technical solutions:
[0007] A check valve, comprising:
[0008] A valve body, including a valve cavity and a liquid inlet joint and a liquid outlet joint respectively located at both ends of the valve cavity. The inner end of the liquid inlet joint is formed with a sealing surface, and the top to the bottom of the sealing surface gradually moves away from the liquid inlet joint. A limiting platform is arranged in the valve cavity, and the limiting platform is located above the sealing surface;
[0009] A valve flap, which is rotatably suspended on the limiting platform, and the valve flap can fit on the sealing surface under its own gravity.
[0010] Optionally, the sealing surface is arranged at a preset angle α with the vertical direction, and the range of the preset angle α is 3° - 10°.
[0011] Optionally, the preset angle α is 8°.
[0012] Optionally, the limiting platform and the valve body are integrally formed.
[0013] Optionally, the limiting platform is an L-shaped limiting platform, and the L-shaped limiting platform and the inner wall of the valve cavity enclose a limiting space, and at least part of the valve flap is rotatably arranged in the limiting space.
[0014] Optionally, two L-shaped limiting platforms are provided on the inner wall of the valve cavity, and the two L-shaped limiting platforms and the inner wall of the valve cavity respectively enclose two limiting spaces. Two hinge parts are provided at the top of the valve flap, and the two hinge parts are respectively rotatably arranged in one of the limiting spaces.
[0015] Optionally, the sealing surface is an annular sealing surface.
[0016] Optionally, the sealing surface is a plane.
[0017] Optionally, the check valve further includes a valve cover. A valve port is provided at the top of the valve body, and the valve cover covers the valve port and is sealingly connected to the valve body.
[0018] Optionally, the check valve further includes a sealing member. An annular sealing groove is provided at the valve port of the valve body, and the sealing member is press-fitted in the annular sealing groove.
[0019] Beneficial effects:
[0020] The present utility model provides a check valve, which includes a valve body and a valve flap. The valve body includes a valve cavity and a liquid inlet joint and a liquid outlet joint respectively located at both ends of the valve cavity. The inner end of the liquid inlet joint forms a sealing surface, and the top to the bottom of the sealing surface gradually moves away from the liquid inlet joint. A limiting platform is arranged in the valve cavity, and the limiting platform is located above the sealing surface; the valve flap is rotatably suspended on the limiting platform, so that when the medium flow rate is low or in a non-pressure state, the valve flap naturally fits on the sealing surface under the action of gravity to close the liquid inlet joint, improving the sealing performance of the check valve and preventing the reverse flow of the medium. Description of the drawings
[0021] Figure 1 is a cross-sectional view of the check valve provided by the present utility model;
[0022] Figure 2 is a structural schematic diagram of the valve body provided by the present utility model.
[0023] In the figure:
[0024] 100, valve flap;
[0025] 200, valve body; 210, valve cavity; 220, liquid inlet joint; 221, sealing surface; 230, liquid outlet joint; 240, limiting platform; 241, limiting space;
[0026] 300, valve cover;
[0027] 400, sealing member. Detailed Embodiments
[0028] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.
[0029] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0030] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.
[0031] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.
[0032] This embodiment provides a check valve, as Figure 1 - Figure 2As shown, the check valve includes a valve body 200 and a valve flap 100. The valve body 200 includes a valve cavity 210, a liquid inlet joint 220 and a liquid outlet joint 230 located at both ends of the valve cavity 210 respectively. The inner end of the liquid inlet joint 220 forms a sealing surface 221. The top to the bottom of the sealing surface 221 gradually moves away from the liquid inlet joint 220. A limiting platform 240 is arranged in the valve cavity 210. The limiting platform 240 is located above the sealing surface 221. The valve flap 100 is rotatably suspended on the limiting platform 240. Thus, when the medium flow rate is low or in a non-pressure state, the valve flap 100 naturally fits on the sealing surface 221 under the action of gravity to close the liquid inlet joint 220, improving the sealing performance of the check valve and preventing the medium from flowing back.
[0033] Optionally, as Figure 1 shown, the sealing surface 221 is arranged at a preset angle α with the vertical direction. The range of the preset angle α is 3° - 10°. It can be understood that when the valve flap 100 is closed, the preset angle α can provide an additional tilting moment for the valve flap 100, making it easier to naturally fit on the sealing surface 221 in a low-flow or non-pressure state, thereby improving the check effect of the valve flap 100. Specifically, the preset angle α can be 3°, 4°, 5°, 6°, 7°, 8°, 9°, 10°.
[0034] In this embodiment, the preset angle α is preferably 8°, ensuring that in the absence of medium pressure or in a low-pressure state, the valve flap 100 fits on the sealing surface 221 under the action of gravity, ensuring the sealing effect, and moreover, not increasing the opening resistance due to the excessive tilt of the valve flap 100.
[0035] Optionally, the limiting platform 240 and the valve body 200 are integrally formed. The design of integrally forming the limiting platform 240 and the valve body 200 does not require complex finishing processes, greatly shortening the processing cycle of the check valve, reducing the production cost, and improving the production efficiency.
[0036] Optionally, as Figure 2 shown, the limiting platform 240 is an L-shaped limiting platform. The L-shaped limiting platform and the inner wall of the valve cavity 210 enclose a limiting space 241. At least part of the valve flap 100 is rotatably arranged in the limiting space 241. The existence of the limiting space 241 provides a constraining and guiding effect for the valve flap 100, preventing the valve flap 100 from shifting or shaking during the opening and closing processes.
[0037] Optionally, two L-shaped limiting platforms are arranged on the inner wall of the valve cavity 210. The two L-shaped limiting platforms respectively enclose two limiting spaces 241 with the inner wall of the valve cavity 210. Two hinge parts are arranged at the top of the valve flap 100. The two hinge parts are respectively rotatably arranged in one limiting space 241, which can greatly improve the stability, sealing performance and impact resistance of the valve flap 100.
[0038] Optionally, the sealing surface 221 is an annular sealing surface, which has a larger contact area to ensure the sealing effect of the valve flap 100 fitting on the sealing surface 221.
[0039] Optionally, in this embodiment, the sealing surface 221 is a flat surface, which can ensure a better sealing effect when the valve flap 100 fits on the sealing surface 221, and guarantees the reliability when the check valve is closed.
[0040] Optionally, a first flow channel is provided in the liquid inlet joint 220, and the first flow channel can communicate with the valve cavity 210. A second flow channel is provided in the liquid outlet joint 230, and the second flow channel communicates with the valve cavity 210. The settings of the first flow channel and the second flow channel can enable the medium to enter and discharge from the valve cavity 210 more smoothly, improving the flow efficiency of the medium.
[0041] Optionally, the check valve further includes a valve cover 300. A valve port is provided at the top of the valve body 200, and the valve cover 300 covers the valve port and is sealingly connected to the valve body 200. By providing the valve port, it is convenient to assemble the valve flap 100 in the valve cavity 210, simplifying the installation process of the valve flap 100. The sealing connection between the valve cover 300 and the valve body 200 ensures that the medium in the valve cavity 210 will not leak during the operation of the check valve, improving the safety of the check valve.
[0042] Optionally, the check valve further includes a sealing member 400. An annular sealing groove is provided at the valve port of the valve body 200, and the sealing member 400 is press-fitted into the annular sealing groove, which can effectively improve the sealing effect at the connection between the valve cover 300 and the valve body 200. In this embodiment, the sealing member 400 is a rubber sealing ring.
[0043] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.
Claims
1. Check valve, characterized in that, Comprising: A valve body (200), including a valve chamber (210) and a liquid inlet joint (220) and a liquid outlet joint (230) respectively located at two ends of the valve chamber (210). An inner end of the liquid inlet joint (220) forms a sealing surface (221), and the top to the bottom of the sealing surface (221) gradually moves away from the liquid inlet joint (220). A limiting platform (240) is provided in the valve chamber (210), and the limiting platform (240) is located above the sealing surface (221); A valve flap (100), which is rotatably suspended on the limiting platform (240), and the valve flap (100) can fit with the sealing surface (221) under its own gravity.
2. The check valve according to claim 1, characterized in that, The sealing surface (221) is arranged at a preset angle α with the vertical direction, and the range of the preset angle α is 3° - 10°.
3. The check valve according to claim 2, characterized in that, The preset angle α is 8°.
4. The check valve according to claim 1, characterized in that, The limiting platform (240) is integrally formed with the valve body (200).
5. The check valve according to claim 4, characterized in that, The limiting platform (240) is an L-shaped limiting platform. The L-shaped limiting platform and the inner wall of the valve chamber (210) enclose a limiting space (241), and at least part of the valve flap (100) is rotatably arranged in the limiting space (241).
6. The check valve according to claim 5, characterized in that, Two L-shaped limiting platforms are provided on the inner wall of the valve chamber (210). The two L-shaped limiting platforms and the inner wall of the valve chamber (210) respectively enclose two limiting spaces (241). Two hinge parts are provided at the top of the valve flap (100), and the two hinge parts are respectively rotatably arranged in one of the limiting spaces (241).
7. The check valve according to claim 1, characterized in that, The sealing surface (221) is an annular sealing surface.
8. The check valve according to claim 1, characterized in that, The sealing surface (221) is a plane.
9. The check valve according to any one of claims 1-7, characterized in that, The check valve further includes a valve cover (300). A valve port is provided at the top of the valve body (200), and the valve cover (300) covers the valve port and is sealingly connected to the valve body (200).
10. The check valve according to claim 9, characterized in that, The check valve further includes a sealing member (400). An annular sealing groove is provided at the valve port of the valve body (200), and the sealing member (400) is press-fitted into the annular sealing groove.