Self-balancing check valve

Abstract

The utility model relates to the field of check valve design, and discloses a self-balancing check valve which comprises a valve body, a valve plate is fixedly connected in the valve body, a bolt is connected in the valve plate in a sliding mode, a nut is fixedly connected to one side of the valve plate, the bolt is connected in the nut in a threaded mode, a limiting plate is connected to the periphery of the bolt in a sliding mode, and the limiting plate is fixedly connected to one side of the valve plate. A limiting plate is fixedly connected to one side of the valve plate, a valve clack is fixedly connected to one side of the limiting plate and slidably connected to the interior of the valve plate, a limiting block is fixedly connected to the interior of the valve plate, the valve clack abuts against one side of the limiting block, a tension spring is fixedly connected between the valve clack and the valve plate, and a first sealing assembly is arranged on the periphery of the valve clack. According to the check valve, backflow prevention, self-balancing and sealing of the valve clack are achieved through cooperation of the bolt, the valve plate, the tension spring, the limiting block and the first sealing assembly, and quick connection of the check valve and a pipeline is achieved through cooperation of the clamping block, the sliding rod, the compression spring clamping groove and the second sealing assembly.

Description

Technical Field

[0001] The utility model relates to the field of check valve design, in particular to a self-balancing check valve. Background Art

[0002] A check valve is a device used in a piping system to prevent the backflow of fluid. A self-balancing check valve is a valve specifically designed to prevent the backflow of fluid. They are commonly used in piping systems to ensure that fluid can only flow in one direction and prevent reverse flow. The design of a self-balancing check valve takes into account the balance of fluid pressure, allowing it to automatically adjust to different pressure conditions.

[0003] After searching, Chinese patent announcement number: CN220060651U discloses a check valve, specifically related to the field of gas transmission, including: a valve cover, a check valve device is installed at the lower end of the valve cover, the check valve device includes: a circulation component and a check component, the check component is detachably installed inside the circulation component, the upper end of the circulation component is detachably installed at the lower end of the valve cover, the circulation component includes: a valve body, a first valve disc and a bolt, and a lower valve body is installed at the rear end of the first valve disc. In the check valve of the utility model, after the baffle completes the fitting work, if the gas flows back from the second valve disc, the resistance on the other side of the baffle can be increased. After the resistance on the other side of the baffle is enhanced, the baffle and the internal flow port of the first valve disc are more closely fitted. After the baffle and the internal flow port of the first valve disc are more closely fitted, the problem of gas backflow in the lower valve body is effectively prevented. The installation and disassembly of the check component are simple and convenient, which reduces the difficulty of its replacement and use, thereby further enhancing the practicality and convenience of use of the entire device.

[0004] The check valve in the above utility model cannot realize the self-balancing function through the components inside the valve body, which will lead to the pressure inside the valve body being out of control and the valve failing. Therefore, a self-balancing check valve is proposed to solve the above problem. Utility Model Content

[0005] In order to make up for the above deficiencies, the utility model provides a self-balancing check valve, which aims to improve the problem in the prior art that the self-balancing function cannot be achieved through the components inside the valve body, which may lead to pressure loss control inside the valve body and valve failure.

[0006] In order to achieve the above-mentioned objectives, the utility model adopts the following technical scheme: a self-balancing check valve, comprising a valve body, a valve plate fixedly connected to the inside of the valve body, a bolt slidably connected to the inside of the valve plate, a nut fixedly connected to one side of the valve plate, the bolt threadedly connected to the inside of the nut, a limiting plate slidably connected to the outer periphery of the bolt, a valve flap fixedly connected to one side of the limiting plate, the valve flap slidably connected to the inside of the valve plate, a limiting block fixedly connected to the inside of the valve plate, the valve flap abuts against one side of the limiting block, a tension spring fixedly connected between the valve flap and the valve plate, and a first sealing assembly is arranged on the outer periphery of the valve flap.

[0007] Furthermore, the first sealing assembly includes a sealing ring 1, the sealing ring 1 is fixedly connected to the outer periphery of the valve disc, a sealing groove 1 is opened inside the valve plate, and the sealing ring 1 is slidably connected inside the sealing groove 1.

[0008] Furthermore, a connecting pipe is slidably connected inside the valve body, a clamping block is slidably connected inside the valve body, a sliding rod is fixedly connected to the middle of the clamping block, a compression spring is fixedly connected between the clamping block and the valve body, a clamping groove is opened inside the connecting pipe, the clamping block is slidably connected inside the clamping groove, and a second sealing assembly is arranged on the outer periphery of the connecting pipe.

[0009] Furthermore, the second sealing assembly includes a second sealing ring, the second sealing ring is fixedly connected to the inside of the valve body, a second sealing groove is opened inside the connecting pipe, and the second sealing ring is slidably connected inside the second sealing groove.

[0010] Furthermore, the tension spring is sleeved on the outer periphery of the bolt, and the limiting plate abuts against one side of the bolt head of the bolt.

[0011] Furthermore, the slide rod is slidably connected to the inside of the valve body, and the compression spring is sleeved on the outer periphery of the slide rod.

[0012] Furthermore, a pull ring is fixedly connected to the outer side of the sliding rod, and the clamping block is slidably connected to the inside of the connecting pipe.

[0013] Furthermore, the material used for the sealing ring 1 and the sealing ring 2 is rubber.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, through the cooperation of bolts, nuts, limit plates, valve discs, valve plates, tension springs, limit blocks and the first sealing assembly, liquid impacts the valve disc from one side of the valve plate, so that the limit plate slides on the bolts, and the valve disc is opened to allow the liquid to pass through. The liquid impacts the valve disc from one side of the valve disc, which makes the valve disc and the valve plate fit tightly, so that the liquid cannot flow back. The limit plate is pulled by the tension spring so that the valve disc can automatically adjust its position to maintain the balance of the valve, thereby realizing the anti-backflow and self-balancing of the valve disc, as well as sealing to prevent liquid from leaking from the connection between the valve plate and the valve disc.

[0016] 2. In the utility model, through the cooperation of the card block, the slide rod, the compression spring slot and the second sealing component, the slide rod is pulled outward to make the card block disengage from the slot, and then the pipe connected to the check valve can be taken out. The second sealing component can prevent liquid from leaking from the connection between the valve body and the connecting pipe, thereby realizing the quick connection of the check valve and the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional schematic diagram of a self-balancing check valve proposed by the utility model;

[0018] Figure 2 This is a structural schematic diagram of a sealing ring 2 of a self-balancing check valve proposed by the utility model;

[0019] Figure 3 The utility model is a schematic diagram of the structure of a limit block of a self-balancing check valve.

[0020] Legend:

[0021] 1. Valve body; 2. Connecting pipe; 3. Valve plate; 4. Bolt; 5. Limit plate; 6. Valve disc; 7. Sealing ring 1; 8. Sealing groove 1; 9. Limit block; 10. Nut; 11. Tension spring; 12. Sealing ring 2; 13. Sealing groove 2; 14. Block; 15. Sliding rod; 16. Compression spring; 17. Slot; 18. Pull ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Reference Figure 1-3The utility model provides an embodiment: a self-balancing check valve, including a valve body 1, a valve plate 3 is fixedly connected inside the valve body 1, a bolt 4 is slidably connected inside the valve plate 3, a nut 10 is fixedly connected to one side of the valve plate 3, the bolt 4 is threadedly connected inside the nut 10, a limit plate 5 is slidably connected to the outer periphery of the bolt 4, a valve flap 6 is fixedly connected to one side of the limit plate 5, the valve flap 6 is slidably connected to the inside of the valve plate 3, a limit block 9 is fixedly connected inside the valve plate 3, the valve flap 6 abuts against one side of the limit block 9, a tension spring 11 is fixedly connected between the valve flap 6 and the valve plate 3, and a first sealing component is arranged on the outer periphery of the valve flap 6. The first sealing component includes a sealing ring 7, the sealing ring 7 is fixedly connected to the outer periphery of the valve flap 6, a sealing groove 8 is provided inside the valve plate 3, and the sealing ring 7 is slidably connected inside the sealing groove 8.

[0024] Specifically, the valve body 1 is the outer shell of the entire self-balancing check valve, which is used to accommodate and support internal components. The valve plate 3 is fixedly connected in the valve body 1 and is used to fix the bolt 4. The bolt 4 is connected to the nut 10 through a thread, and the outer periphery of the bolt 4 is slidably connected to the limit plate 5. The thread of the bolt 4 is connected inside the nut 10. By adjusting the position of the nut 10, the relative position of the valve flap 6 that can move can be changed, thereby adjusting the balance state of the valve. The valve flap 6 is slidably connected inside the valve plate 3 and interacts with the limit block 9. The tension spring 11 is connected between the valve flap 6 and the valve plate 3 to provide a certain restoring force and balancing force. The design of the limit block 9 affects the abutment position of the valve flap 6, and then affects the movement and balance of the valve flap 6. The first sealing assembly includes a sealing ring 7, which is fixedly connected to the outer periphery of the valve flap 6. The sealing ring 7 cooperates with the sealing groove 8 on the valve plate 3 to ensure good sealing performance when the valve flap 6 is closed.

[0025] Reference Figure 1-3 The valve body 1 is slidably connected with a connecting pipe 2, a clamping block 14 is slidably connected with the valve body 1, a sliding rod 15 is fixedly connected to the middle of the clamping block 14, a compression spring 16 is fixedly connected between the clamping block 14 and the valve body 1, a clamping groove 17 is provided inside the connecting pipe 2, the clamping block 14 is slidably connected inside the clamping groove 17, and a second sealing component is arranged on the outer periphery of the connecting pipe 2. The second sealing component includes a sealing ring 12, the sealing ring 12 is fixedly connected inside the valve body 1, a sealing groove 13 is provided inside the connecting pipe 2, and the sealing ring 12 is slidably connected inside the sealing groove 13.

[0026] Specifically, the connecting pipe 2 is used to transport liquid, the clamping block 14 is used to cooperate with the clamping groove 17 to fix the connecting pipe 2 inside the valve body 1, and the compression spring 16 is used to squeeze the clamping block 14 to make it clamped inside the clamping groove 17. The second sealing assembly is used to ensure the sealing of the connection between the connecting pipe 2 and the valve body 1 to prevent liquid leakage.

[0027] Reference Figure 1-3, the tension spring 11 is sleeved on the outer periphery of the bolt 4, and the limit plate 5 is in contact with the screw head side of the bolt 4. The slide rod 15 is slidably connected to the inside of the valve body 1, and the compression spring 16 is sleeved on the outer periphery of the slide rod 15. A pull ring 18 is fixedly connected to the outside of the slide rod 15, and the clamping block 14 is slidably connected to the inside of the connecting pipe 2. The material used for the sealing ring 1 7 and the sealing ring 2 12 is rubber.

[0028] Specifically, the tension spring 11 is used to pull the limit plate 5 so that the valve flap 6 can adapt to liquids of different pressures. The compression spring 16 is used to squeeze the block 14 to ensure that the connecting pipe 2 can be stably connected to the inside of the valve body 1. The pull ring 18 is used to facilitate pulling the slide bar 15 so that the block 14 is separated from the slot 17, so as to facilitate the removal of the connecting pipe 2. Rubber has good elasticity, corrosion resistance and good sealing performance.

[0029] Working principle: When the liquid impacts the valve disc 6 from one side of the valve plate 3, the limit plate 5 slides on the bolt 4, and the valve disc 6 is opened to allow the liquid to pass. The liquid impacts the valve disc 6 from one side of the valve disc 6, which makes the valve disc 6 and the valve plate 3 fit tightly, so that the liquid cannot flow back. The adjustment of the bolt 4 can change the relative position of the valve disc 6 through the position of the nut 10, thereby adjusting the balance state of the valve. The tension spring 11 provides a certain restoring force and balancing force, which helps to make the valve disc 6 close quickly and adapt to liquids of different pressures. The design of the limit block 9 affects the abutment position of the valve disc 6, and then affects the movement and balance of the valve disc 6. The sealing ring 17 and the sealing groove 18 ensure that the valve disc 6 has good sealing performance when it is closed to prevent liquid leakage. The sealing ring 2 12 and the sealing groove 2 13 between the connecting pipe 2 and the valve body 1 prevent liquid leakage, while the structure of the compression spring 16 and the block 14 ensures that the connecting pipe 2 is stably fixed inside the valve body 1.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 protection scope of the present invention.

Claims

1. A self-balancing check valve, comprising a valve body (1), characterized in that: A valve plate (3) is fixedly connected to the interior of the valve body (1), a bolt (4) is slidably connected to the interior of the valve plate (3), a nut (10) is fixedly connected to one side of the valve plate (3), the bolt (4) is threadedly connected to the interior of the nut (10), a limit plate (5) is slidably connected to the outer periphery of the bolt (4), a valve flap (6) is fixedly connected to one side of the limit plate (5), the valve flap (6) is slidably connected to the interior of the valve plate (3), a limit block (9) is fixedly connected to the interior of the valve plate (3), the valve flap (6) abuts against one side of the limit block (9), a tension spring (11) is fixedly connected between the valve flap (6) and the valve plate (3), and a first sealing component is arranged on the outer periphery of the valve flap (6).

2. A self-balancing check valve according to claim 1, characterized in that: The first sealing assembly comprises a sealing ring (7), wherein the sealing ring (7) is fixedly connected to the outer periphery of the valve flap (6), a sealing groove (8) is provided inside the valve plate (3), and the sealing ring (7) is slidably connected inside the sealing groove (8).

3. A self-balancing check valve according to claim 2, characterized in that: The valve body (1) is slidably connected to a connecting pipe (2), the valve body (1) is slidably connected to a clamping block (14), a sliding rod (15) is fixedly connected to the middle of the clamping block (14), a compression spring (16) is fixedly connected between the clamping block (14) and the valve body (1), a clamping groove (17) is provided inside the connecting pipe (2), the clamping block (14) is slidably connected inside the clamping groove (17), and a second sealing component is arranged on the outer periphery of the connecting pipe (2).

4. A self-balancing check valve according to claim 3, characterized in that: The second sealing assembly comprises a second sealing ring (12), the second sealing ring (12) being fixedly connected to the inside of the valve body (1), a second sealing groove (13) being provided inside the connecting pipe (2), and the second sealing ring (12) being slidably connected to the inside of the second sealing groove (13).

5. A self-balancing check valve according to claim 1, characterized in that: The tension spring (11) is sleeved on the outer periphery of the bolt (4), and the limiting plate (5) abuts against one side of the screw head of the bolt (4).

6. A self-balancing check valve according to claim 3, characterized in that: The sliding rod (15) is slidably connected to the inside of the valve body (1), and the compression spring (16) is sleeved on the outer periphery of the sliding rod (15).

7. A self-balancing check valve according to claim 3, characterized in that: A pull ring (18) is fixedly connected to the outside of the sliding rod (15), and the clamping block (14) is slidably connected to the inside of the connecting pipe (2).

8. A self-balancing check valve according to claim 4, characterized in that: The material used for the sealing ring 1 (7) and the sealing ring 2 (12) is rubber.

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