Check valve with leak-proof structure

Abstract

The utility model relates to the field of check valves, in particular to a check valve with an anti-leakage structure, which comprises a first valve body, a second valve body arranged at one end of the first valve body, a first sealing groove arranged at one end of the outer side of the second valve body, a second sealing groove arranged on the outer side of the first valve body, and second O-shaped rings sleeved on the outer sides of the first sealing groove and the second sealing groove. A first sealing arc plate is arranged below the outer side of the first valve body and the outer side of the second valve body, a first limiting rod is arranged in the second valve body, a first valve element is fixedly connected to one end of the first limiting rod, and a sealing ring is installed on the side, close to the second water stop plate, of the first valve element. By means of the double independent design of the first valve element and the second valve element, when water flow impurities block one valve element, the other valve element can still be normally jacked up to conduct water flow, it is guaranteed that the anti-backflow function is not interrupted, and the reliability of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of check valves, and in particular to a check valve with a leak-proof structure. Background Technology

[0002] As a key component in fluid control systems, check valves are widely used in petrochemical, water supply and drainage, aerospace and other fields. Their core function is to prevent backflow of media through unidirectional flow design and protect equipment safety. Traditional check valves mainly rely on gravity, a single spring or fluid pressure to drive the valve disc to close. However, under high pressure, high temperature or media containing impurities, problems such as single seal failure and leakage are prone to occur.

[0003] Chinese utility model patent discloses a safety anti-leakage check valve (application number: 2013205860857). The rocker arm in this application is made of highly elastic stainless steel. When the fluid pressure in the pipeline decreases, it closes under the action of the valve disc's own weight and the cantilever elasticity, thereby enhancing the sealing performance of the valve after it is closed.

[0004] However, the aforementioned patented technology still has structural limitations. Although the patent achieves a dual mechanism of gravity and elasticity through the design of a highly elastic stainless steel cantilever, it is essentially still a single sealing structure design. In actual operation, when encountering working conditions with impurities in the medium or abnormal wear of the sealing components, the structure lacks redundant sealing protection, which can easily lead to the risk of sealing failure. In particular, when solid particles are stuck on the sealing surface or the elastic element undergoes fatigue fracture, it will directly cause the valve disc to fail to close effectively, resulting in a medium backflow accident, thus demonstrating that the device is not very practical.

[0005] To address the aforementioned technical shortcomings, a solution is proposed. Utility Model Content

[0006] The purpose of this invention is to provide a check valve with a leak-proof structure to solve the aforementioned technical defects.

[0007] The objective of this utility model can be achieved through the following technical solutions:

[0008] A check valve with a leak-proof structure includes a valve body 1, a valve body 2 at one end of the valve body 1, a sealing groove 1 at one outer end of the valve body 2, a sealing groove 2 at the outer side of the valve body 1, an O-ring 2 fitted on the outer side of both the sealing groove 1 and the sealing groove 2, a sealing arc plate 1 at the lower outer side of the valve body 1 and the valve body 2, a limiting rod 1 inside the valve body 2, a valve core 1 fixedly connected to one end of the limiting rod 1, and a sealing ring installed on the side of the valve core 1 near the water-stop plate 2.

[0009] Preferably, a threaded groove is provided at one end of the valve body two near the valve body one, an integrally formed waterstop plate one is fixedly provided inside the valve body two, an integrally formed limiting ring one is provided inside the waterstop plate one, an integrally formed waterstop plate two is also provided inside the valve body two on one side of the limiting ring one, an integrally formed limiting ring two is fixedly provided inside the valve body two on one side of the waterstop plate two, and a threaded interface is provided at the other end of the valve body two.

[0010] Preferably, one end of the valve body is also provided with a threaded interface, and an integrally formed mounting ring is fixedly provided at the end of the valve body near the valve body. The mounting ring is threadedly connected to the threaded groove, and an O-ring is embedded at one end of the mounting ring. An integrally formed limiting ring is also fixedly provided inside the valve body.

[0011] Preferably, symmetrically distributed bolts are installed below one end of the sealing arc plate one, and an O-ring two is provided at the other end of the sealing arc plate one for rotational connection. A screw is placed inside the other end of the O-ring two, and the screw is threadedly connected to the bolt inside the sealing arc plate one. The sealing arc plate one and the sealing arc plate two have grooves inside that correspond to the O-ring two.

[0012] Preferably, the limiting rod one is slidably connected to the limiting ring two, the valve core one and the waterstop plate two form a dynamic seal, the other end of the valve core one is provided with a fixedly connected limiting rod two, the outer side of the limiting rod two is provided with a slidably connected hollow rod, the hollow rod is hollow inside and is slidably connected to the waterstop plate one.

[0013] Preferably, a valve core two is fixedly connected to the outer side of the hollow rod, and a sealing ring is also installed on the side of the valve core two near the limiting ring one. The valve core two and the limiting ring one form a dynamic seal. A telescopic spring is placed between the water-stop plate one and the valve core one, and a telescopic spring is also placed between the limiting ring three and the valve core two.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. This utility model has a dual independent design of valve core one and valve core two. When water impurities block one of the valve cores, the other valve core can still be pushed up to conduct water flow normally, ensuring that the anti-backflow function is not interrupted and improving the reliability of the device.

[0016] 2. This utility model adopts a split threaded connection between valve body one and valve body two, and with detachable sealing arc plate one and sealing arc plate two, the device can be quickly disassembled when the seal fails, and the stuck impurities can be directly cleaned without the use of complicated tools, thereby shortening the maintenance time. When the valve core seal fails, the faulty valve core can be directly located by disassembling the sealing arc plate assembly, and targeted cleaning or replacement can be performed, avoiding the scrapping of the entire device and reducing maintenance costs. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings;

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the connection structure between valve body one, valve body two and sealing arc plate in this utility model;

[0020] Figure 3 This is a cross-sectional view of valve body two in this utility model;

[0021] Figure 4 This is a schematic diagram of the overall structure of valve body one in this utility model;

[0022] Figure 5 This is a cross-sectional structural diagram of valve body one and valve body two in this utility model.

[0023] Legend: 1. Valve body one; 11. Valve body two; 12. Threaded groove; 13. Sealing groove one; 14. Waterstop plate one; 15. Limiting ring one; 16. Waterstop plate two; 17. Limiting ring two; 18. Threaded interface; 19. Sealing groove two; 20. Limiting ring three; 21. Mounting ring; 22. O-ring one; 23. Sealing arc plate one; 24. O-ring two; 25. Sealing arc plate two; 26. Screw; 27. Limiting rod one; 28. Valve core one; 29. ​​Sealing ring; 30. Telescopic spring; 31. Limiting rod two; 32. Hollow rod; 33. Valve core two. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1 - Figure 5As shown, this utility model is a check valve with a leakage prevention structure, including a valve body 1, a valve body 2 11 at one end of the valve body 1, a threaded groove 12 at the end of the valve body 2 11 near the valve body 1, a sealing groove 13 at the outer end of the valve body 2 11, an integrally formed water-stop plate 14 fixedly installed inside the valve body 2 11, an integrally formed limiting ring 15 installed inside the water-stop plate 14, an integrally formed water-stop plate 2 16 installed inside the valve body 2 11 on one side of the limiting ring 15, an integrally formed limiting ring 2 17 fixedly installed inside the valve body 2 11 on one side of the water-stop plate 2 16, and a threaded interface 18 at the other end of the valve body 2 11.

[0026] One end of valve body 1 is also provided with a threaded interface 18. A sealing groove 29 is provided on the outer side of valve body 1. An integrally formed mounting ring 21 is fixedly provided at one end of valve body 1 near valve body 21. The mounting ring 21 is threadedly connected to the threaded groove 12. An O-ring 22 is embedded at one end of the mounting ring 21. The O-ring 22 is used to prevent leakage. An integrally formed limiting ring 30 is also fixedly provided inside valve body 1.

[0027] O-rings 24 are fitted on the outer sides of sealing groove 13 and sealing groove 19. Sealing arc plate 23 is provided on the lower outer side of valve body 1 and valve body 21. Bolts are symmetrically distributed at one end of sealing arc plate 23. O-rings 24 are rotatably connected at the other end of sealing arc plate 23. Screws 26 are symmetrically distributed inside the other end of O-ring 24. Screws 26 are threadedly connected to the bolts inside sealing arc plate 23. Grooves corresponding to O-rings 24 are opened inside sealing arc plate 1 and sealing arc plate 25. Sealing arc plate 1 and sealing arc plate 25 are used to press O-rings 24, thereby further preventing leakage.

[0028] The valve body 21 has a limiting rod 27 inside, which is slidably connected to the limiting ring 27. One end of the limiting rod 27 is fixedly connected to the valve core 28. A sealing ring 29 is installed on the side of the valve core 28 near the waterstop plate 26, forming a dynamic seal between the valve core 28 and the waterstop plate 26. The other end of the valve core 28 is fixedly connected to the limiting rod 31. A hollow rod 32 is slidably connected to the outside of the limiting rod 31. The hollow rod 32 is hollow inside and slidably connected to the waterstop plate 14. A valve core 23 is fixedly connected to the outside of the hollow rod 32. A sealing ring 29 is also installed on the side of the valve core 23 near the limiting ring 15, forming a dynamic seal between the valve core 23 and the limiting ring 15. A telescopic spring 30 is placed between the waterstop plate 14 and the valve core 28, and a telescopic spring 30 is also placed between the limiting ring 30 and the valve core 23.

[0029] The working process and principle of this utility model are as follows:

[0030] Before use, according to the flow markings on the outside of valve body 211, first connect the threaded interface 18 at one end of valve body 11 and valve body 211 to the external water pipe. During use, water flows in through one end of valve body 211, and then the water flows up valve core 128 and valve core 23 in sequence, and then flows out through one end of valve body 1. When there are many impurities in the water flow that jam valve core 128 or valve core 23, it will not affect the anti-backflow function of this device. When the seal of valve core 128 or valve core 23 fails, first unscrew the screw between sealing arc plate 225 and sealing arc plate 123, then take out sealing arc plate 123 and sealing arc plate 225, and unscrew valve body 11 and valve body 211 to remove the impurities jammed in valve core 128 or valve core 23.

[0031] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A check valve with a leak-proof structure, comprising a valve body (1), characterized in that, One end of the valve body 1 (1) is provided with valve body 2 (11). One end of the outer side of valve body 2 (11) is provided with sealing groove 1 (13). One side of valve body 1 (1) is provided with sealing groove 2 (19). O-ring 2 (24) is fitted on the outer side of both sealing groove 1 (13) and sealing groove 2 (19). Sealing arc plate 1 (23) is provided below the outer side of valve body 1 (1) and valve body 2 (11). Limiting rod 1 (27) is provided inside valve body 2 (11). One end of limiting rod 1 (27) is provided with valve core 1 (28) fixedly connected. Sealing ring 29 is installed on the side of valve core 1 (28) near waterstop plate 2 (16).

2. A check valve with a leak-proof structure according to claim 1, characterized in that, The valve body 2 (11) has a threaded groove (12) at one end near the valve body 1 (1). The valve body 2 (11) has an integrally formed waterstop plate 1 (14) fixed inside. The waterstop plate 1 (14) has an integrally formed limiting ring 1 (15) inside. The valve body 2 (11) on one side of the limiting ring 1 (15) also has an integrally formed waterstop plate 2 (16). The valve body 2 (11) on one side of the waterstop plate 2 (16) has an integrally formed limiting ring 2 (17) fixed inside. The other end of the valve body 2 (11) has a threaded interface (18).

3. A check valve with a leak-proof structure according to claim 1, characterized in that, One end of the valve body (1) is also provided with a threaded interface (18). One end of the valve body (1) near the valve body (11) is fixedly provided with an integrally formed mounting ring (21). The mounting ring (21) is threadedly connected to the threaded groove (12). One end of the mounting ring (21) is embedded with an O-ring (22). The inside of the valve body (1) is also fixedly provided with an integrally formed limiting ring (20).

4. A check valve with a leak-proof structure according to claim 1, characterized in that, The sealing arc plate 1 (23) has symmetrically distributed bolts installed at one end below it. The other end of the sealing arc plate 1 (23) is provided with a rotating O-ring 2 (24). The other end of the O-ring 2 (24) has symmetrically distributed screws (26) inside it. The screws (26) are threadedly connected to the bolts inside the sealing arc plate 1 (23). The sealing arc plate 1 (23) and the sealing arc plate 2 (25) have grooves inside that correspond to the O-ring 2 (24).

5. A check valve with a leak-proof structure according to claim 3, characterized in that, The limiting rod one (27) is slidably connected to the limiting ring two (17), the valve core one (28) and the water stop plate two (16) form a dynamic seal, the other end of the valve core one (28) is provided with a fixedly connected limiting rod two (31), the outer side of the limiting rod two (31) is provided with a slidably connected hollow rod (32), the hollow rod (32) is hollow inside and slidably connected to the water stop plate one (14).

6. A check valve with an anti-leakage structure according to claim 5, characterized in that, The hollow rod (32) is provided with a fixedly connected valve core two (33) on its outer side. A sealing ring (29) is also installed on the side of the valve core two (33) near the limiting ring one (15). The valve core two (33) and the limiting ring one (15) form a dynamic seal. A telescopic spring (30) is placed between the water stop plate one (14) and the valve core one (28). A telescopic spring (30) is also placed between the limiting ring three (20) and the valve core two (33).

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