Slow-closing type check valve capable of preventing water hammer
By using a combination design of positive and negative pole magnetic blocks in the check valve, the double-relaxed closing effect is generated, which solves the problem of water hammer impact caused by rapid closing of the check valve and improves the reliability of the check valve.
Patent Information
- Application Number
- CN202420963858.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-05-07
AI Technical Summary
The existing check valve lacks slow-closing components, which makes it easy to cause water hammer impact to damage the pipe system devices when the valve is closed unexpectedly and quickly, affecting the reliability of use.
The combination design of positive electrode magnetic block and negative electrode magnetic block is adopted, and the magnetic interaction force is used to generate preliminary and further resistance to the check valve plate, achieving a double relaxed closing effect and preventing the valve from closing quickly.
Effectively avoid water hammer impact damage to the pipe system devices and improve the reliability of the check valve.
Smart Images
Figure CN223137050U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of check valves, in particular to a slow-closing check valve for preventing water hammer. Background Technique
[0002] A check valve refers to a valve whose closing member is a circular valve flap and uses its own weight and medium pressure to generate actions to block the reverse flow of the medium. It belongs to the category of automatic valves and is also called a non-return valve, a one-way valve, a reflux valve or an isolation valve. Check valves are often used in pipeline systems with pumping devices to prevent the backflow of water. In a pipeline system driven by a pump, due to actions such as opening the valve, closing the valve and stopping the pump, the flow velocity and pressure of the fluid in the pipeline will change sharply, forming water hammer, which will cause certain harm to the pipeline system. During the use of existing check valves, due to the lack of slow-closing components in most of them, the performance of preventing water hammer is poor. If the valve closes quickly accidentally, it is easy to form a water hammer impact and damage the pipeline system devices, affecting the use reliability of the check valve. Therefore, we propose a slow-closing check valve for preventing water hammer to solve the above problems. Content of the Utility Model
[0003] The purpose of the utility model is to provide a slow-closing check valve for preventing water hammer to solve the problems raised in the above background technique.
[0004] To achieve the above purpose, the utility model provides the following technical solutions:
[0005] A slow-closing check valve for preventing water hammer, including a valve body and a check valve plate. A connecting seat is fixedly arranged inside the valve body. The check valve plate is rotatably connected to the connecting seat through a rotating shaft. Protective sleeve a is fixedly arranged on both sides of the check valve plate. Positive magnetic block a is fixedly arranged inside the protective sleeve a. A front seat is fixedly arranged inside the valve body. Protective sleeve b is fixedly embedded on the front seat. Negative magnetic block is fixedly arranged inside the protective sleeve b. A rear seat is arranged at the rear side of the front seat inside the valve body. Protective sleeve c is fixedly embedded on the rear seat. Negative magnetic block is fixedly arranged inside the protective sleeve c.
[0006] Preferably, a limit stop block is fixedly arranged on the connecting seat, and a rubber gasket is fixedly arranged at the bottom of the limit stop block.
[0007] By setting the limit stop block and the rubber gasket, the purpose of being able to play a good blocking and limiting role when the check valve plate flips and opens is achieved.
[0008] Preferably, a cover plate is provided at the upper port of the valve body, and the cover plate is fixedly installed on the valve body through fastening bolts.
[0009] Preferably, a sealing block is fixedly arranged at the bottom of the cover plate, and the sealing block is adapted to the upper port of the valve body.
[0010] By setting it in this way, the sealing block can be inserted into the upper port of the valve body to achieve a good sealing effect.
[0011] Preferably, a sealing groove is formed on the surface of the upper port of the valve body, and a sealing ring is fixedly connected to the bottom of the cover plate outside the sealing block, and the sealing ring is adapted to the sealing groove.
[0012] By setting it in this way, the sealing ring can be fitted and embedded in the sealing groove to ensure the sealing performance between the valve body and the cover plate.
[0013] Preferably, both the sealing block and the sealing ring are integrally formed with the cover plate.
[0014] Preferably, a water inlet flange is fixedly arranged at the water inlet port of the valve body, and a water outlet flange is fixedly arranged at the water outlet port of the valve body.
[0015] By providing the water inlet flange and the water outlet flange, the purpose of connecting the valve body to the pipeline system can be achieved.
[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0017] In the present utility model, by utilizing the repulsive force generated between the positive magnetic block b and the positive magnetic block a on one side of the check valve plate, a preliminary resistance can be generated to the check valve plate when it is flipped and closed. When the check valve plate continues to flip and close, by utilizing the attractive force generated between the negative magnetic block and the positive magnetic block a on the other side of the check valve plate, a further resistance can be generated to the check valve plate when it is flipped and closed, thereby producing a good double slow-closing effect, effectively avoiding the water hammer impact damage to the pipeline system components easily formed when the check valve accidentally closes rapidly, and improving the use reliability of the check valve. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a schematic cross-sectional structure view when the check valve plate of a water hammer-proof slow-closing check valve of the present utility model is closed;
[0019] Figure 2 is Figure 1 an enlarged structure view of part A in
[0020] Figure 3 is Figure 1 an enlarged structure view of part B in
[0021] Figure 4 is a schematic cross-sectional structure view when the check valve plate of a water hammer-proof slow-closing check valve of the present utility model is opened.
[0022] In the figure: 1. Valve body; 101. Sealing groove; 102. Inlet flange; 103. Outlet flange; 2. Check valve plate; 3. Connecting seat; 301. Rotating shaft; 302. Limit stop; 303. Rubber gasket; 4. Protective sleeve a; 401. Positive magnet a; 5. Front seat; 501. Protective sleeve b; 502. Positive magnet b; 6. Rear seat; 601. Protective sleeve c; 602. Negative magnet; 7. Cover plate; 701. Sealing block; 702. Sealing ring; 8. Fastening bolt. Specific embodiments
[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0024] Please refer to Figures 1 - 4 As shown, a technical solution provided by the present invention:
[0025] A water hammer-preventing slow-closing check valve includes a valve body 1 and a check valve plate 2. A connecting seat 3 is fixedly arranged inside the valve body 1. The check valve plate 2 is rotatably connected to the connecting seat 3 through a rotating shaft 301. Protective sleeves a 4 are fixedly arranged on both sides of the check valve plate 2. Positive magnets a 401 are fixedly arranged inside the protective sleeves a 4. A front seat 5 is fixedly arranged inside the valve body 1. A protective sleeve b 501 is fixedly embedded on the front seat 5. A positive magnet b 502 is fixedly arranged inside the protective sleeve b 501. When the check valve closes rapidly by accident, the check valve plate 2 flips downward to close. By using the repulsive force generated between the positive magnet b 502 and the positive magnet a 401 on one side of the check valve plate 2, a preliminary resistance can be generated to the check valve plate 2 during the flipping and closing process. A rear seat 6 is arranged behind the front seat 5 inside the valve body 1. A protective sleeve c 601 is fixedly embedded on the rear seat 6. A negative magnet 602 is fixedly arranged inside the protective sleeve c 601. When the check valve plate 2 continues to flip and close, by using the attractive force generated between the negative magnet 602 and the positive magnet a 401 on the other side of the check valve plate 2, further resistance can be generated to the check valve plate 2 during the flipping and closing process.
[0026] As a preferred embodiment in this embodiment, as Figure 1 shown, a limit stop 302 is fixedly arranged on the connecting seat 3, and a rubber gasket 303 is fixedly arranged at the bottom of the limit stop 302, achieving the purpose of playing a good blocking and limiting role when the check valve plate 2 flips and opens.
[0027] As a preferred embodiment in this embodiment, as Figure 1As shown in the figure, a cover plate 7 is provided at the upper port of the valve body 1, and the cover plate 7 is fixedly installed on the valve body 1 through fastening bolts 8.
[0028] As a preferred implementation manner in this embodiment, as Figure 1 and Figure 3 shown, a sealing block 701 is fixedly arranged at the bottom of the cover plate 7. The sealing block 701 is adapted to the upper port of the valve body 1, so that the sealing block 701 can be inserted into the upper port of the valve body 1 by fitting to achieve a good sealing effect. A sealing groove 101 is formed on the surface of the upper port of the valve body 1. A sealing ring 702 is fixedly connected to the bottom of the cover plate 7 outside the sealing block 701. The sealing ring 702 is adapted to the sealing groove 101, so that the sealing ring 702 can be embedded in the sealing groove 101 by fitting to ensure the sealing performance between the valve body 1 and the cover plate 7. Both the sealing block 701 and the sealing ring 702 are integrally formed with the cover plate 7.
[0029] As a preferred implementation manner in this embodiment, as Figure 4 shown, a water inlet flange 102 is fixedly arranged at the water inlet port of the valve body 1, and a water outlet flange 103 is fixedly arranged at the water outlet port of the valve body 1, achieving the purpose of connecting the valve body 1 to the pipeline system.
[0030] Working principle:
[0031] During the use of this check valve, if the check valve closes suddenly by accident, the check valve plate 2 flips downward to close. By using the repulsive force generated between the positive magnetic block b502 and the positive magnetic block a401 on one side of the check valve plate 2, a preliminary resistance can be generated to the check valve plate 2 during the flipping and closing process. When the check valve plate 2 continues to flip and close, by using the attractive force generated between the negative magnetic block 602 and the positive magnetic block a401 on the other side of the check valve plate 2, a further resistance can be generated to the check valve plate 2 during the flipping and closing process, so as to achieve a good double slow-closing effect and effectively avoid easily forming water hammer impact to damage the pipeline system components.
[0032] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only the preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.
Claims
1. A slow-closing check valve for preventing water hammer, comprising a valve body (1) and a check valve plate (2). A connecting seat (3) is fixedly arranged inside the valve body (1), and the check valve plate (2) is rotatably connected to the connecting seat (3) through a rotating shaft (301), characterized in that: On both sides of the check valve plate (2), protective sleeves a (4) are fixedly arranged. Inside the protective sleeve a (4), a positive magnetic block a (401) is fixedly arranged. Inside the valve body (1), a front seat (5) is fixedly arranged. A protective sleeve b (501) is fixedly embedded on the front seat (5). Inside the protective sleeve b (501), a positive magnetic block b (502) is fixedly arranged. A rear seat (6) is arranged at the rear side of the front seat (5) inside the valve body (1). A protective sleeve c (601) is fixedly embedded on the rear seat (6). Inside the protective sleeve c (601), a negative magnetic block (602) is fixedly arranged.
2. The slow-closing check valve for preventing water hammer according to claim 1, characterized in that: A limit stop block (302) is fixedly arranged on the connecting seat (3). A rubber gasket (303) is fixedly arranged at the bottom of the limit stop block (302).
3. A slow-closing check valve for preventing water hammer according to claim 1, characterized in that: A cover plate (7) is provided at the upper port of the valve body (1). The cover plate (7) is fixedly installed on the valve body (1) through fastening bolts (8).
4. The slow-closing check valve for preventing water hammer according to claim 3, wherein: A sealing block (701) is fixedly arranged at the bottom of the cover plate (7). The sealing block (701) is adapted to the upper port of the valve body (1).
5. A slow-closing check valve for preventing water hammer according to claim 4, characterized in that: A sealing groove (101) is formed on the surface of the upper port of the valve body (1). A sealing ring (702) is fixedly connected to the outside of the sealing block (701) at the bottom of the cover plate (7). The sealing ring (702) is adapted to the sealing groove (101).
6. The slow-closing check valve for preventing water hammer according to claim 5, characterized in that: Both the sealing block (701) and the sealing ring (702) are integrally formed with the cover plate (7).
7. A slow-closing check valve for preventing water hammer according to claim 1, characterized in that: An inlet flange (102) is fixedly arranged at the inlet port of the valve body (1). An outlet flange (103) is fixedly arranged at the outlet port of the valve body (1).