Rubber clack check valve

Abstract

The utility model discloses a rubber clack check valve which comprises a valve body, connecting pipes are installed on the two sides of the valve body, a second nut is installed at the bottom end of an installation screw, a cover body is installed at the top end of a first connecting plate, and a handle is installed at the top end of the cover body. The cover body is installed at the top end of the inlet, the cover body can be clamped into the inlet to be installed, after the cover body is clamped into the inlet, the first connecting plate on the outer side of the cover body covers the top end of the second connecting plate on the outer side of the inlet, and an installation screw can penetrate through the first connecting plate and the second connecting plate. When the interior of the valve body needs to be maintained, the second nut is unscrewed, then the handle is grasped to detach the cover body, and then the interior of the valve body can be maintained through the inlet. In this way, the purpose that the interior of the valve body of the rubber clack check valve is convenient to maintain is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a rubber flap check valve. Background Art

[0002] A check valve is a valve with a circular disc as its opening and closing part. It relies on its own weight and medium pressure to produce a movement to block the backflow of the medium. It is an automatic valve and is also called a non-return valve, one-way valve, reflux valve or isolation valve. The function of a check valve is to allow the fluid to flow along the water inlet, but the medium at the water outlet cannot flow back. The disc movement mode is divided into lifting type and swing type. The check valve is used in combination with a stop valve to play a role of safety isolation. It is used in hydraulic systems to prevent oil flow from flowing in the opposite direction, or in pneumatic systems to prevent compressed air from flowing in the opposite direction.

[0003] To this end, Chinese patent application number CN201916548U discloses a rubber-flap check valve comprising a valve body, a valve cover, and a valve disc. The valve cover is mounted on the upper portion of the valve body. One end of the valve disc is pin-mounted on the valve cover and can rotate about its axis. The valve disc as a whole is tilted and rests against the sealing seat of the valve body. The valve disc is a rubber valve disc. This utility model has a simple structure, is not susceptible to corrosion, has a long service life, and provides good sealing effect.

[0004] 1. The above-mentioned rubber flap check valve solves the problem that the valve flap is not easily corroded, has a long service life and a good sealing effect. However, after a long period of use, the internal valve flap of the valve body will still wear and foreign matter will be deposited. When this happens, the entire valve body needs to be dismantled, cleaned and maintained. However, the existing rubber flap check valve body itself is mostly an integrated structure, which makes it difficult to repair and clean the interior of the valve body.

[0005] 2. When the valve body is in use, it will be connected to other pipes. The traditional check valve is only sealed by a sealing gasket. When the valve body is connected to other pipes, the sealing of the connection is not strong enough, which may cause water leakage and air leakage, making it difficult to strengthen the sealing of the valve body connection. Utility Model Content

[0006] The utility model aims to provide a rubber flap check valve, which is used to solve the defects of the existing rubber flap check valve that it is difficult to maintain the interior of the valve body and to enhance the sealing performance of the valve body connection.

[0007] In order to solve the above technical problems, the present utility model provides the following technical solutions: a rubber flap check valve, comprising a valve body;

[0008] Connecting pipes are installed on both sides of the valve body, a reinforcement ring is installed on the outside of the connecting pipe, a connecting structure is installed on one side of the connecting pipe, a pipe body is installed on one side of the connecting structure, and a filtering structure is installed on one side of the inner side of the valve body;

[0009] A rotating shaft is installed on one side of the valve body, and a valve disc is installed at the bottom end of the rotating shaft. An inlet is installed at the top end of the valve body, and a disassembly structure is installed at the top end of the inlet. The disassembly structure includes a first connecting plate, a second connecting plate, a cover body, a handle, a mounting screw, a second nut and a sealing gasket;

[0010] The second connecting plate is installed at the top of the entrance, the first connecting plate is installed at the top of the second connecting plate, the top of the first connecting plate is movably connected with a mounting screw, the bottom end of the mounting screw is installed with a second nut, the top of the first connecting plate is installed with a cover body, and the top of the cover body is installed with a handle.

[0011] When in use, first, the valve disc is made of rubber material. The valve disc can be rotated by the rotating shaft. The valve disc can only rotate to one side. As shown in the figure, when water or gas moves from left to right, the impact force will push the valve disc open and pass through the valve body. When water or gas moves from right to left, the valve disc will be blocked by the connecting pipe at the bottom and cannot rotate. Therefore, the valve disc will block the water and gas to prevent the water or gas from flowing back.

[0012] Furthermore, the connection structure includes a first flange, a second flange, a fixing screw, a first nut, a pressure block and a rubber pad. The second flange is installed on one side of the pipe body, a first flange is provided on one side of the second flange, a fixing screw passes through one side of the first flange, and the fixing screw is therefore installed with a first nut, a rubber pad is provided on one side of the first flange, and a pressure block is installed on one side of the second flange. The first flange and the second flange can cooperate to connect the pipe body and the connecting pipe together.

[0013] Furthermore, the fixing screw and the first nut form a threaded connection, and the first nuts are arranged at equal intervals on one side of the second flange. The fixing screw and the first nut cooperate to fix the first flange and the second flange.

[0014] Furthermore, the pressing block and the rubber pad form a snap-fit ​​structure, the outer diameter of the pressing block is smaller than the inner diameter of the rubber pad, and the pressing block and the rubber pad cooperate to enhance the sealing between the flanges.

[0015] Furthermore, the filtering structure includes a mounting plate, a mounting block, a side plate and a filter screen. The mounting block is installed on one side of the valve body, a mounting plate is installed on one side of the mounting block, a side plate is provided on the outside of the mounting plate, and a filter screen is installed inside the mounting plate, through which gas and water can be filtered.

[0016] Furthermore, a card slot is provided on one side of the mounting block, and a card block is provided on one side of the mounting plate. The mounting block and the mounting plate form a card-fitting structure, and the card-fitting structure is easy to disassemble.

[0017] Furthermore, external threads are evenly provided on the outer wall of the mounting screw, and internal threads that cooperate with the external threads are evenly provided on the inner wall of the second nut. The mounting screw and the second nut are threadedly connected, and the mounting screw and the second nut can cooperate to fix the cover body on the top of the entrance.

[0018] The rubber flap check valve provided by the utility model has the following advantages: the cover body is fixed at the top end of the inlet, and can be fixed at the top end of the inlet by installing screws and nuts. The cover body can be opened and the interior of the valve body can be repaired through the inlet. The filter screen inside the valve body can filter the water and gas passing through. The first flange and the second flange can cooperate to connect the valve body to different pipe bodies, and the internal rubber gasket can enhance the sealing between the flanges.

[0019] By installing a cover body at the top end of the inlet, the cover body can be snapped into the inside of the inlet for installation. After the cover body is snapped into the inside of the inlet, the first connecting plate on the outside of the cover body covers the top end of the second connecting plate on the outside of the inlet. The mounting screws can pass through the first connecting plate and the second connecting plate, and then the second nut can be tightened to fix the first connecting plate and the second connecting plate together. In this way, the cover body can be fixed to the top end of the inlet. When maintenance is needed inside the valve body, the second nut is unscrewed, and then the handle is grasped to remove the cover body, and the inside of the valve body can be maintained through the inlet, thereby achieving the purpose of facilitating maintenance of the inside of the valve body of the rubber flap check valve.

[0020] By installing a first flange on one side of the connecting pipe, the first flange on one side of the connecting pipe and the second flange on one side of the pipe body cooperate with each other, and the fixing screws pass through the first flange and the second flange. Then, after tightening the first nut, the first flange and the second flange can be fixed together. The first flange and the second flange can cooperate to fix the connecting pipe and the pipe body together. The pressure block on one side of the second flange can be stuck into the groove of the first flange. The pressure block will squeeze the rubber gasket. The rubber gasket is elastic. After being squeezed, the rubber gasket will fill the gap between the flanges and strengthen the sealing between the first flange and the second flange. In this way, the rubber flap check valve can be used to strengthen the sealing between the flanges. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0022] Figure 2 This is a schematic diagram of the front cross-sectional structure of the present utility model;

[0023] Figure 3 For the utility model Figure 2 A schematic diagram of the enlarged structure of the local section at point A in the middle;

[0024] Figure 4 This is a schematic diagram of a partial cross-sectional structure of the disassembly and assembly structure of the utility model;

[0025] Figure 5 This is a schematic diagram of a partial cross-sectional structure of the connection structure of the present invention.

[0026] Explanation of the reference numerals in the figure: 1. Valve body; 2. Connecting pipe; 3. Connecting structure; 301. First flange; 302. Second flange; 303. Fixing screw; 304. First nut; 305. Pressure block; 306. Rubber pad; 4. Tube body; 5. Rotating shaft; 6. Valve disc; 7. Filter structure; 701. Mounting plate; 702. Mounting block; 703. Side plate; 704. Filter screen; 8. Reinforcement ring; 9. Disassembly and assembly structure; 901. First connecting plate; 902. Second connecting plate; 903. Cover body; 904. Handle; 905. Mounting screw; 906. Second nut; 907. Sealing gasket; 10. Inlet. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 5 The utility model provides an embodiment: a rubber flap check valve, including a valve body 1.

[0029] Connecting pipes 2 are installed on both sides of the valve body 1, and a reinforcement ring 8 is installed on the outside of the connecting pipe 2. A connecting structure 3 is installed on one side of the connecting pipe 2. The connecting structure 3 includes a first flange 301, a second flange 302, a fixing screw 303, a first nut 304, a pressure block 305 and a rubber pad 306. The second flange 302 is installed on one side of the pipe body 4, and a first flange 301 is provided on one side of the second flange 302. A fixing screw 303 passes through one side of the first flange 301, and the fixing screw 303 and the first nut 304 form a threaded connection. The first nuts 304 are arranged at equal intervals on one side of the second flange 302.

[0030] The fixing screw 303 is therefore installed with a first nut 304, a rubber pad 306 is provided on one side of the first flange 301, and a pressure block 305 is installed on one side of the second flange 302. The pressure block 305 and the rubber pad 306 form a snap-fit ​​structure, and the outer diameter of the pressure block 305 is smaller than the inner diameter of the rubber pad 306.

[0031] Refer to the attached Figure 1-2 and attached Figure 5As shown, the first flange 301 on one side of the connecting pipe 2 and the second flange 302 on one side of the pipe body 4 cooperate with each other, and the fixing screw 303 passes through the first flange 301 and the second flange 302. Then, after being tightened by the first nut 304, the first flange 301 and the second flange 302 can be fixed together. The first flange 301 and the second flange 302 can cooperate to fix the connecting pipe 2 and the pipe body 4 together. The pressing block 305 on one side of the second flange 302 can be stuck into the groove of the first flange 301. The pressing block 305 will squeeze the rubber gasket 306. The rubber gasket 306 is elastic. After being squeezed, the rubber gasket 306 will fill the gap between the flanges, thereby strengthening the sealing between the first flange 301 and the second flange 302.

[0032] A tube body 4 is installed on one side of the connecting structure 3, and a filter structure 7 is installed on one side of the inside of the valve body 1. The filter structure 7 includes a mounting plate 701, a mounting block 702, a side plate 703 and a filter screen 704. The mounting block 702 is installed on one side of the valve body 1. A card slot is provided on one side of the mounting block 702, and a card block is provided on one side of the mounting plate 701. The mounting block 702 and the mounting plate 701 constitute a snap-fit ​​structure.

[0033] A mounting plate 701 is mounted on one side of the mounting block 702 , a side plate 703 is provided on the outer side of the mounting plate 701 , and a filter screen 704 is mounted inside the mounting plate 701 .

[0034] Refer to the attached Figure 2-3 As shown, the valve flap 6 is made of rubber material, and the valve flap 6 can be rotated by the rotating shaft 5. The valve flap 6 can only rotate to one side. As shown in the figure, when water or gas moves from left to right, the impact force will push the valve flap 6 to pass through the valve body 1. When water or gas moves from right to left, the valve flap 6 will be blocked by the connecting pipe 2 at the bottom and cannot rotate. Therefore, the valve flap 6 will block the water and gas to prevent the water or gas from flowing back. The water and gas passing through the valve body 1 will be filtered by the filter 704. The mounting plate 701 and the mounting block 702 form a snap-fit ​​structure. The filter 704 is fixed to the mounting block 702 through the mounting plate 701. The side plate 703 allows the filter 704 to be easily disassembled. When the filter 704 needs to be disassembled, the filter 704 can be disassembled through the inlet 10.

[0035] A rotating shaft 5 is installed on one side of the valve body 1, and a valve disc 6 is installed at the bottom end of the rotating shaft 5. An inlet 10 is installed at the top of the valve body 1, and a disassembly structure 9 is installed at the top of the inlet 10. The disassembly structure 9 includes a first connecting plate 901, a second connecting plate 902, a cover body 903, a handle 904, a mounting screw 905, a second nut 906 and a sealing gasket 907.

[0036] The second connecting plate 902 is installed at the top of the inlet 10, and the first connecting plate 901 is installed on the top of the second connecting plate 902. The top of the first connecting plate 901 is movably connected with a mounting screw 905. The outer wall of the mounting screw 905 is evenly provided with external threads, and the inner wall of the second nut 906 is evenly provided with internal threads that cooperate with the external threads. The mounting screw 905 and the second nut 906 are threadedly connected.

[0037] A second nut 906 is mounted on the bottom end of the mounting screw 905 , a cover 903 is mounted on the top end of the first connecting plate 901 , and a handle 904 is mounted on the top end of the cover 903 .

[0038] Refer to the attached Figure 1-2 and attached Figure 4 As shown, the cover body 903 and the inlet 10 form a snap-fit ​​structure, and the cover body 903 can be snapped into the inside of the inlet 10 for installation. After the cover body 903 is snapped into the inside of the inlet 10, the sealing gasket 907 can strengthen the sealing between the cover body 903 and the inlet 10, and the first connecting plate 901 on the outside of the cover body 903 covers the top of the second connecting plate 902 on the outside of the inlet 10. The mounting screw 905 can pass through the first connecting plate 901 and the second connecting plate 902, and then the second nut 906 can be tightened to fix the first connecting plate 901 and the second connecting plate 902 together, so that the cover body 903 can be fixed to the top of the inlet 10. When the interior of the valve body 1 needs to be maintained, the second nut 906 is unscrewed, and then the handle 904 is grasped to remove the cover body 903, and the interior of the valve body 1 can be maintained through the inlet 10.

[0039] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rubber flap check valve comprising a valve body (1); Its characteristics are: Connecting pipes (2) are installed on both sides of the valve body (1), a reinforcing ring (8) is installed on the outside of the connecting pipe (2), a connecting structure (3) is installed on one side of the connecting pipe (2), a pipe body (4) is installed on one side of the connecting structure (3), and a filtering structure (7) is installed on one side of the interior of the valve body (1); A rotating shaft (5) is installed on one side of the valve body (1), and a valve flap (6) is installed at the bottom end of the rotating shaft (5); an inlet (10) is installed at the top end of the valve body (1), and a disassembly structure (9) is installed at the top end of the inlet (10), and the disassembly structure (9) includes a first connecting plate (901), a second connecting plate (902), a cover body (903), a handle (904), a mounting screw (905), a second nut (906) and a sealing gasket (907); The second connecting plate (902) is installed at the top of the inlet (10), the first connecting plate (901) is installed at the top of the second connecting plate (902), the top of the first connecting plate (901) is movably connected with a mounting screw (905), the bottom end of the mounting screw (905) is installed with a second nut (906), the top of the first connecting plate (901) is installed with a cover body (903), and the top of the cover body (903) is installed with a handle (904).

2. A rubber flap check valve according to claim 1, characterized in that: The connection structure (3) comprises a first flange (301), a second flange (302), a fixing screw (303), a first nut (304), a pressure block (305) and a rubber pad (306); the second flange (302) is mounted on one side of the tube body (4); the first flange (301) is provided on one side of the second flange (302); a fixing screw (303) passes through one side of the first flange (301); the first nut (304) is installed on one side of the fixing screw (303); a rubber pad (306) is provided on one side of the first flange (301); and the pressure block (305) is installed on one side of the second flange (302).

3. The rubber flap check valve according to claim 2, characterized in that: The fixing screws (303) and the first nuts (304) form a threaded connection, and the first nuts (304) are arranged at equal intervals on one side of the second flange (302).

4. The rubber flap check valve according to claim 2, characterized in that: The pressing block (305) and the rubber pad (306) form a snap-fit ​​structure, and the outer diameter of the pressing block (305) is smaller than the inner diameter of the rubber pad (306).

5. The rubber flap check valve according to claim 1, characterized in that: The filtering structure (7) comprises a mounting plate (701), a mounting block (702), a side plate (703) and a filter screen (704); the mounting block (702) is mounted on one side of the valve body (1); a mounting plate (701) is mounted on one side of the mounting block (702); a side plate (703) is provided on the outer side of the mounting plate (701); and a filter screen (704) is mounted inside the mounting plate (701).

6. The rubber flap check valve according to claim 5, characterized in that: A card slot is provided on one side of the mounting block (702), and a card block is provided on one side of the mounting plate (701), and the mounting block (702) and the mounting plate (701) form a card-fitting structure.

7. The rubber flap check valve according to claim 1, characterized in that: External threads are evenly arranged on the outer wall of the mounting screw (905), and internal threads that cooperate with the external threads are evenly arranged on the inner wall of the second nut (906). The mounting screw (905) and the second nut (906) are threadedly connected.

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