Built-in double-clack check valve

Abstract

The utility model relates to a built-in double-clack check valve in the technical field of check valves. A valve clack used for preventing media from flowing back is installed in the middle of the valve body, a lower pin shaft used for limiting the valve clack is installed in the middle of the valve clack, a connecting assembly used for limiting the lower pin shaft is installed in the middle of the lower pin shaft, and upper pin shafts used for limiting the connecting assembly are installed at the two ends of the connecting assembly. According to the improved structure, the completeness of a waterplane is guaranteed while the flow of the valve is guaranteed, the leakage risk caused by damage to the sealing waterplane of the end face of the valve is avoided, when the valve clack, the lower pin shaft, the connecting assembly and the upper pin shaft are disassembled, inner clamp spring pliers are clamped into third limiting holes of the two shaft bodies respectively, the two shaft bodies are made to be close to each other, a spring is compressed, and the valve clack is disassembled. And after the two shaft bodies are far away from the bearing, the valve clack, the lower pin shaft, the connecting assembly and the upper pin shaft can be taken out of the valve body, and disassembly of the valve clack, the lower pin shaft, the connecting assembly and the upper pin shaft is completed outside the valve body.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to an internal double-flap check valve. Background Technique

[0002] A check valve refers to a valve whose closing member is a circular valve flap and which blocks the reverse flow of the medium by its own weight and the action of the medium pressure. Its main functions are to prevent the reverse flow of the medium, prevent the pump and the driving motor from reversing, and prevent the release of the medium in the container.

[0003] For example, a double-flap swing check valve disclosed in Chinese Patent Application No. CN200920116806.1, the specific content of which is as follows: on both sides of the inner wall of the valve body corresponding to the position of the positioning plate, a positioning groove with an arc-shaped cross-section is formed. An arc-shaped protrusion adapted to the positioning groove is formed at the bottom of the positioning plate. On the other side of the positioning plate relative to the valve flap, a positioning block is provided at the outer end. Two screw holes are opened in the positioning block, and the setting direction of the screw holes is the same as the setting direction of the channel of the valve body. Blind holes are formed in the positioning plate near the positioning block corresponding to the screw holes. Two screws pass through the screw holes and the blind holes to form a fixed connection between the positioning plate and the positioning block. It has the following technical problems:

[0004] The formation of a positioning groove with an arc-shaped cross-section on both sides of the inner wall of the valve body corresponding to the position of the positioning plate will damage a part of the sealing water line surface on the outlet end face of the valve body, which is not conducive to the sealing after the valve is installed on the pipeline. Content of the Utility Model

[0005] To solve the problem that the positioning groove in the above background technique will damage a part of the sealing water line surface on the outlet end face of the valve body, the utility model provides the following technical solutions:

[0006] An internal double-flap check valve, comprising a valve body;

[0007] A valve flap for preventing the reverse flow of the medium is installed in the middle of the valve body, and a lower pin shaft for limiting the valve flap is installed in the middle of the valve flap.

[0008] A connecting component for limiting the lower pin shaft is installed in the middle of the lower pin shaft, and upper pin shafts for limiting the connecting component are installed at both ends of the connecting component.

[0009] A valve seat is installed on the inner wall of the valve body, and a bearing for limiting the upper pin shaft is installed in the middle of the valve seat.

[0010] The upper pin shaft includes a shaft body, and a limiting hole three is opened on one side of the shaft body for facilitating the quick disassembly of the valve flap, the lower pin shaft, the connecting component and the upper pin shaft by cooperating with an internal circlip pliers.

[0011] Further, the valve flap includes a first semi-circular flap, and both ends of the first semi-circular flap are provided with first valve plate seats for cooperating with the lower pin shaft to limit the first semi-circular flap.

[0012] Further, the valve flap includes a second semi-circular flap, and both ends of the second semi-circular flap are provided with second valve flap seats for cooperating with the lower pin shaft to limit the second semi-circular flap.

[0013] Further, one end of the lower pin shaft is sleeved with a first torsion spring for controlling the reset of the first semi-circular flap, and the other end of the lower pin shaft is sleeved with a second torsion spring for controlling the reset of the second semi-circular flap.

[0014] Further, a first limiting hole for cooperating with the connecting component to limit the lower pin shaft is formed in the middle of the lower pin shaft, and a second limiting hole is formed on one side of the cavity of the first limiting hole.

[0015] Further, the connecting component includes a positioning rod, sliders are installed at the lower ends on both sides of the positioning rod, a connecting rod is installed at the lower end in the middle of the positioning rod, and one end of the connecting rod is inserted into the cavity of the first limiting hole.

[0016] Further, a threaded hole is formed at one end of the connecting rod, the connecting component includes a bolt for cooperating with the threaded hole to limit the lower pin shaft, and one end of the bolt is located in the cavity of the second limiting hole.

[0017] Further, a jack for placing the positioning rod is formed in the middle of the shaft body, a sliding groove for the slider to slide is formed at the lower end of the cavity of the jack, and a spring for pushing the positioning rod is arranged inside the cavity of the jack.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] In the improved structure, while ensuring the valve flow rate, the integrity of the waterline surface is ensured, the leakage risk caused by the damage to the end face sealing waterline surface of the valve is avoided. When disassembling the valve flap, the lower pin shaft, the connecting component and the upper pin shaft, use an internal circlip pliers to respectively clip into the limiting holes three of the two shaft bodies, make the two shaft bodies approach and compress the spring. When the two shaft bodies are away from the bearing, the valve flap, the lower pin shaft, the connecting component and the upper pin shaft can be taken out from the valve body, and the disassembly of the valve flap, the lower pin shaft, the connecting component and the upper pin shaft is completed outside the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the overall structural schematic diagram of the present utility model;

[0021] Figure 2 is the structural schematic diagram of the valve body of the present utility model;

[0022] Figure 3This is a schematic structural view of the valve flap of the present utility model;

[0023] Figure 4 This is a schematic structural view of the lower pin shaft of the present utility model;

[0024] Figure 5 This is a schematic structural view of the connection assembly of the present utility model;

[0025] Figure 6 This is a schematic structural view of the upper pin shaft of the present utility model.

[0026] In the drawings, the list of the names of the parts represented by the reference numerals is as follows:

[0027] 100 - valve body, 110 - valve seat, 111 - bearing;

[0028] 200 - valve flap, 210 - first semi - circular flap, 211 - first valve flap seat, 220 - second semi - circular flap, 221 - second valve flap seat;

[0029] 300 - lower pin shaft, 310 - first torsion spring, 320 - second torsion spring, 330 - first limiting hole, 331 - second limiting hole;

[0030] 400 - connection assembly, 410 - positioning rod, 411 - slider, 412 - connecting rod, 413 - threaded hole, 420 - bolt;

[0031] 500 - upper pin shaft, 510 - shaft body, 511 - third limiting hole, 512 - jack, 513 - chute, 520 - spring. Detailed implementation mode

[0032] The following details the preferred specific implementation modes for implementing the present utility model, and a clear and complete description is made in conjunction with the drawings.

[0033] Please refer to Figures 1-6 , the present utility model provides an in - built double - flap check valve, including a valve body 100, a valve flap 200, a lower pin shaft 300, a connection assembly 400, and an upper pin shaft 500. Through the arrangement of the connection assembly 400, it is convenient to use an internal circlip pliers to clip into the cavities of the two third limiting holes 511, so that the two upper pin shafts 500 approach each other, and the upper pin shaft 500 can be removed from the middle of the bearing 111, and then the upper pin shaft 500 and the connection assembly 400 can be disassembled. Since the bolt 420 cooperates with the threaded hole 413 to fix the lower pin shaft 300 at the bottom of the connecting rod 412, when disassembling the connection assembly 400 and the upper pin shaft 500, the lower pin shaft 300 and the valve flap 200 can be synchronously disassembled. Since the in - built double - flap check valve provided by the present utility model does not have a cavity opened on the side wall of the valve body, the damage to the sealing water line surface of the valve end face is avoided, and the integrity of the sealing water line surface is ensured.

[0034] Two valve seats 110 are fixedly installed on the inner wall of the valve body 100, and the two valve seats 110 are symmetrically arranged on the inner wall of the valve seat 110. A bearing 111 for limiting the upper pin shaft 500 is fixedly installed in the middle of the valve seat 110.

[0035] A valve flap 200 for preventing the backflow of the medium is installed in the middle of the valve body 100. The valve flap 200 includes a first semi-circular flap 210. At both ends of the first semi-circular flap 210, first valve plate seats 211 for cooperating with the lower pin shaft 300 to limit the first semi-circular flap 210 are fixedly installed. The valve flap 200 includes a second semi-circular flap 220. At both ends of the second semi-circular flap 220, second valve flap seats 221 for cooperating with the lower pin shaft 300 to limit the second semi-circular flap 220 are fixedly installed. And cavities for placing the lower pin shaft 300 are provided in the middle of both the first valve plate seat 211 and the second valve flap seat 221.

[0036] A lower pin shaft 300 for limiting the valve flap 200 is installed in the middle of the valve flap 200. A first torsion spring 310 for controlling the reset of the first semi-circular flap 210 is sleeved on one end of the lower pin shaft 300, and a second torsion spring 320 for controlling the reset of the second semi-circular flap 220 is sleeved on the other end of the lower pin shaft 300.

[0037] A first limiting hole 330 for cooperating with the connecting component 400 to limit the lower pin shaft 300 is provided in the middle of the lower pin shaft 300. A second limiting hole 331 is provided on one side of the cavity of the first limiting hole 330. By inserting the connecting rod 412 into the cavity of the first limiting hole 330 and placing the bolt 420 on one side of the second limiting hole 331, a limiting circular block for limiting the lower pin shaft 300 is fixedly installed on the side of the connecting rod 412 close to the bolt 420, and the diameter of the limiting circular block is larger than the diameter of the cavity of the first limiting hole 330. Rotate the bolt 420 so that the limiting circular block on the connecting rod 412 cooperates with the bolt 420 to clamp and limit the lower pin shaft 300, making the lower pin shaft 300 unable to move.

[0038] A connecting component 400 for limiting the lower pin shaft 300 is installed in the middle of the lower pin shaft 300. The connecting component 400 includes a positioning rod 410. Sliders 411 are fixedly installed at the lower ends on both sides of the positioning rod 410. A connecting rod 412 is fixedly installed at the lower end in the middle of the positioning rod 410, and one end of the connecting rod 412 is inserted into the cavity of the first limiting hole 330. A threaded hole 413 is provided at one end of the connecting rod 412. The connecting component 400 includes a bolt 420 for cooperating with the threaded hole 413 to limit the lower pin shaft 300, and one end of the bolt 420 is in the cavity of the second limiting hole 331.

[0039] At both ends of the connecting component 400, there are upper pin shafts 500 for limiting the connecting component 400. The upper pin shaft 500 includes a shaft body 510, and on one side of the shaft body 510, there is a limit hole three 511 which is convenient for cooperating with an internal circlip pliers to quickly disassemble the valve flap 200, the lower pin shaft 300, the connecting component 400 and the upper pin shaft 500.

[0040] The upper pin shaft 500 includes a shaft body 510. In the middle of the shaft body 510, there is a jack 512 for placing the positioning rod 410. At the lower end of the cavity of the jack 512, there is a sliding groove 513 for the slider 411 to slide. Inside the cavity of the jack 512, there is a spring 520 for pushing the positioning rod 410.

[0041] In the improved structure, while ensuring the valve flow rate, the integrity of the waterplane is guaranteed, and the leakage risk caused by the damage to the end face sealing waterplane of the valve is avoided. When disassembling the valve flap 200, the lower pin shaft 300, the connecting component 400 and the upper pin shaft 500, use the internal circlip pliers to respectively clip into the limit hole three 511 of the two shaft bodies 510, so that the two shaft bodies 510 approach and compress the spring 520. When the two shaft bodies 510 are away from the bearing 111, the valve flap 200, the lower pin shaft 300, the connecting component 400 and the upper pin shaft 500 can be taken out of the valve body, and then the disassembly of the valve flap 200, the lower pin shaft 300, the connecting component 400 and the upper pin shaft 500 is completed outside the valve body.

[0042] Based on the above content and the drawings, those skilled in the art can understand and implement the present utility model. In addition, any non-creative modification made by those skilled in the art to the present utility model without creative work still falls within the protection scope of the present utility model.

Claims

1. An in-built double-flap check valve, comprising a valve body (100), characterized in that: A valve flap (200) for preventing the backflow of the medium is installed in the middle of the valve body (100), and a lower pin shaft (300) for limiting the valve flap (200) is installed in the middle of the valve flap (200); A connecting component (400) for limiting the lower pin shaft (300) is installed in the middle of the lower pin shaft (300), and upper pin shafts (500) for limiting the connecting component (400) are installed at both ends of the connecting component (400); A valve seat (110) is installed on the inner wall of the valve body (100), and a bearing (111) for limiting the upper pin shaft (500) is installed in the middle of the valve seat (110); The upper pin shaft (500) includes a shaft body (510), and a third limiting hole (511) is provided on one side of the shaft body (510) to facilitate the quick disassembly of the valve flap (200), the lower pin shaft (300), the connecting component (400) and the upper pin shaft (500) by cooperating with an internal circlip pliers.

2. The built-in double-flap check valve according to claim 1, characterized in that: The valve flap (200) includes a first semi-circular flap (210), and first valve plate seats (211) for cooperating with the lower pin shaft (300) to limit the first semi-circular flap (210) are installed at both ends of the first semi-circular flap (210).

3. The built-in double-flap check valve according to claim 2, characterized in that: The valve flap (200) includes a second semi-circular flap (220), and second valve flap seats (221) for cooperating with the lower pin shaft (300) to limit the second semi-circular flap (220) are installed at both ends of the second semi-circular flap (220).

4. The built-in double-flap check valve according to claim 3, characterized in that: A first torsion spring (310) for controlling the reset of the first semi-circular flap (210) is sleeved on one end of the lower pin shaft (300), and a second torsion spring (320) for controlling the reset of the second semi-circular flap (220) is sleeved on the other end of the lower pin shaft (300).

5. The built-in double-flap check valve according to claim 1, characterized in that: A first limiting hole (330) for cooperating with the connecting component (400) to limit the lower pin shaft (300) is provided in the middle of the lower pin shaft (300), and a second limiting hole (331) is provided on one side of the cavity of the first limiting hole (330).

6. The built-in double-flap check valve according to claim 5, characterized in that: The connecting component (400) includes a positioning rod (410), sliders (411) are installed at the lower ends on both sides of the positioning rod (410), a connecting rod (412) is installed at the lower end in the middle of the positioning rod (410), and one end of the connecting rod (412) is inserted into the cavity of the first limiting hole (330).

7. An internal double-flap check valve according to claim 6, characterized in that: A threaded hole (413) is provided at one end of the connecting rod (412), and the connecting component (400) includes a bolt (420) for cooperating with the threaded hole (413) to limit the lower pin shaft (300), and one end of the bolt (420) is located in the cavity of the second limiting hole (331).

8. The built-in double-flap check valve according to claim 6, characterized in that: A jack (512) for placing the positioning rod (410) is provided in the middle of the shaft body (510), a chute (513) for sliding the slider (411) is provided at the lower end of the cavity of the jack (512), and a spring (520) for pushing the positioning rod (410) is arranged inside the cavity of the jack (512).

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