A sewage backwater prevention check valve

Abstract

The utility model discloses a kind of sewage anti-return water check valves, including valve body, the bottom of the valve body is communicated with sealing seat, the bottom of the sealing seat is provided with first pipeline, sealing groove is opened in the middle of the sealing seat, liftable sealing assembly is clamped in the sealing groove, the sealing assembly includes the sealing disc of installation plate below, the outer edge of the sealing disc is covered with sealing ring, the top of the installation plate is connected with moving plate by elastic connecting component, the elastic connecting component includes sleeve being set in the top of installation plate. The utility model structure design scientific and reasonable, can effectively block sewage reverse flow, solve the problem of traditional check valve sealing not tight, ensure that sealing disc can be tightly fitted in sealing groove, even long-term use can maintain good sealability, solve the sealing failure problem caused by abrasion or spring attenuation of sealing element.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a drain anti-backflow check valve. Background Technology

[0002] In sewage systems, check valves are crucial components for preventing sewage backflow. Currently available anti-backflow check valves on the market generally suffer from the following problems: traditional gate valves or ball valves are prone to aging of the sealing rubber after prolonged use, leading to incomplete sealing. Additionally, many sealing structures use a single spring or gravity seal, which, after long-term use, experiences spring elasticity decay or seal wear, easily resulting in seal failure and backflow. To address these issues, we have proposed a new anti-backflow check valve for sewage systems. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a one-way valve for preventing backflow in drainage systems. This utility model solves the problems mentioned in the background section.

[0004] This utility model provides the following technical solution: a drain anti-backflow one-way valve, including a valve body, a sealing seat connected to the bottom of the valve body, a first pipe provided at the bottom of the sealing seat, a sealing groove opened in the middle of the sealing seat, a liftable sealing component snapped into the sealing groove, the sealing component including a sealing disc installed below the mounting plate, the outer edge of the sealing disc being covered with a sealing ring, a movable plate connected to the top of the mounting plate through an elastic connecting component, the elastic connecting component including a sleeve set at the top of the mounting plate, a connecting rod inserted into the top opening of the sleeve, a first spring sleeved on the connecting rod, the top end of the connecting rod passing through a through hole in the middle of the movable plate and rotatably connected to a screw, an installation frame provided at the top of the valve body, a screw block provided in the middle of the installation frame, the screw being spirally connected to the screw block, an annular groove opened on the side of the screw, and a bearing sleeve movably sleeved in the annular groove, an anti-rotation mechanism connected to the side of the bearing sleeve.

[0005] In the above scheme, the valve body is mounted on the bracket, and the side opening of the valve body is connected to a second pipe.

[0006] In the above scheme, the two ends of the first spring are connected to the upper surface of the mounting plate and the lower surface of the movable plate, respectively.

[0007] In the above scheme, the elastic connection assembly also includes multiple guide rods fixed on the mounting plate, the top end of the guide rods being movably inserted into the movable plate, and a second spring being sleeved on the guide rod between the mounting plate and the movable plate.

[0008] In the above scheme, a handle is connected to the top end of the screw.

[0009] In the above scheme, the anti-rotation mechanism includes a limiting rod and a limiting block, and the limiting block is movably engaged in the movable groove opened in the side wall of the mounting frame.

[0010] In the above scheme, a through hole is provided on the top of the valve body, and a waterproof ring is provided inside the through hole.

[0011] The advantages and beneficial effects of this utility model are as follows: This utility model provides a drain anti-backflow one-way valve, which forms a multi-layer sealing structure through the cooperation of the sealing seat, sealing groove, sealing disc and sealing ring, which can effectively prevent sewage from flowing back and solve the problem of poor sealing of traditional one-way valves. The sleeve, connecting rod, first spring, guide rod and second spring in the elastic connection assembly cooperate with each other to make the sealing assembly subject to uniform elastic force during the lifting process, ensuring that the sealing disc can fit tightly in the sealing groove, and can maintain good sealing performance even after long-term use, thus solving the problem of sealing failure caused by wear of sealing components or spring decay. Attached Figure Description

[0012] 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.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the sealing mechanism of this utility model;

[0015] Figure 3 This is a schematic diagram of the anti-rotation mechanism of this utility model.

[0016] In the diagram: 1. Valve body; 11. Sealing seat; 12. First pipe; 13. Second pipe; 14. Bracket; 15. Sealing groove; 16. Sealing disc; 17. Mounting plate; 18. Sealing ring; 19. Sleeve; 2. Connecting rod; 21. Moving plate; 22. First spring; 23. Guide rod; 24. Second spring; 25. Screw; 26. Mounting frame; 27. Screw block; 28. Handle; 29. ​​Annular groove; 3. Bearing sleeve; 31. Limiting rod; 32. Limiting block. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0018] like Figure 1-3 As shown, this utility model is a drain anti-backflow one-way valve, including a valve body 1. The bottom of the valve body 1 is connected to a sealing seat 11. A first pipe 12 is provided at the bottom of the sealing seat 11. A sealing groove 15 is opened in the middle of the sealing seat 11. A liftable sealing component is snapped into the sealing groove 15. The sealing component includes a sealing disc 16 installed below the mounting plate 17. The outer edge of the sealing disc 16 is covered with a sealing ring 18. The top of the mounting plate 17 is connected to a movable plate 21 through an elastic connecting component. The elastic connecting component includes a... The sleeve 19 at the top of the mounting plate 17 has a connecting rod 2 inserted into its top opening. A first spring 22 is fitted on the connecting rod 2. The top end of the connecting rod 2 passes through the through hole in the middle of the moving plate 21 and is rotatably connected to a screw 25. The top of the valve body 1 is provided with a mounting frame 26. A screw block 27 is provided in the middle of the mounting frame 26. The screw 25 is screwed to the screw block 27. An annular groove 29 is opened on the side of the screw 25, and a bearing sleeve 3 is movably fitted in the annular groove 29. An anti-rotation mechanism is connected to the side of the bearing sleeve 3.

[0019] In the above structure, the sealing seat 11, sealing groove 15, sealing disc 16, and sealing ring 18 constitute the main sealing components. The sealing disc 16 is connected to the moving plate 21 through an elastic connecting assembly. The first spring 22 in the elastic connecting assembly provides elastic force, allowing the sealing disc 16 to fit tightly within the sealing groove 15, thus preventing sewage backflow. The helical connection structure between the screw 25 and the screw block 27 allows rotating the screw 25 to move the moving plate 21 up and down, thereby adjusting the height of the sealing component. The anti-rotation mechanism ensures that the bearing sleeve 3 does not rotate when the screw 25 rotates, guaranteeing the stability of the adjustment process.

[0020] In the above scheme, the valve body 1 is mounted on the bracket 14, and a second pipe 13 is connected to the side opening of the valve body 1. The bracket 14 is used to fix the valve body 1, so that the valve can be stably installed in the sewer system. The second pipe 13 is connected to the side opening of the valve body 1 to connect to the drain pipe, forming a complete drainage channel. This structural design facilitates the installation of the valve and the layout of the pipes, improving the convenience and flexibility of installation.

[0021] In the above scheme, the two ends of the first spring 22 are connected to the upper surface of the mounting plate 17 and the lower surface of the moving plate 21, respectively. As an important component of the elastic connection assembly, the first spring 22, with its two ends connected to the mounting plate 17 and the moving plate 21, can provide an upward elastic force for the sealing assembly, ensuring that the sealing disc 16 always remains in contact with the sealing groove 15. This ensures that the sealing disc 16 can effectively prevent sewage backflow when there is no water flow or reverse water flow, thus guaranteeing the sealing performance of the valve.

[0022] In the above scheme, the elastic connection assembly further includes multiple guide rods 23 fixed on the mounting plate 17. The top end of each guide rod 23 is movably inserted into the movable plate 21, and a second spring 24 is sleeved on the guide rod 23 between the mounting plate 17 and the movable plate 21. The guide rods 23 and the second spring 24 increase the stability of the elastic connection assembly. The guide rods 23 guide the movement of the movable plate 21, preventing the movable plate 21 from tilting or jamming during lifting and lowering, ensuring that the sealing assembly can be lifted and lowered vertically. The second spring 24 works together with the first spring 22 to provide a more uniform elastic force, further improving the tightness of the fit between the sealing disc 16 and the sealing groove 15, and solving the problem of insufficient stability of the sealing assembly.

[0023] In the above solution, a handle 28 is connected to the top of the screw 25. The handle 28 allows the operator to manually rotate the screw 25 to drive it, eliminating the need for other tools, greatly simplifying the adjustment process of the sealing pressure and improving the convenience and efficiency of adjustment.

[0024] In the above scheme, the anti-rotation mechanism includes a limiting rod 31 and a limiting block 32, with the limiting block 32 movably engaged in a movable groove opened in the side wall of the mounting frame 26. The anti-rotation mechanism composed of the limiting rod 31 and the limiting block 32 can restrict the rotation of the bearing sleeve 3. When the screw 25 is rotated, the bearing sleeve 3 cannot rotate because the limiting block 32 is engaged in the movable groove, and can only move along the annular groove 29 with the rotation of the screw 25, thereby ensuring that the screw 25 moves only axially, realizing precise adjustment of the position of the moving plate 21, and ensuring the accuracy and stability of the adjustment process.

[0025] In the above scheme, a through hole is provided at the top of the valve body 1, and a waterproof ring is installed inside the through hole. The through hole at the top of the valve body 1 is for the screw 25 to pass through. The waterproof ring can effectively prevent external moisture, dust and other impurities from entering the interior of the valve body 1 through the through hole, avoid corrosion of internal parts, extend the service life of the valve and improve the reliability of the valve.

[0026] Working principle:

[0027] This type of anti-backflow check valve works by applying upward pressure to the sealing disc 16 when sewage flows backward. The elastic force of the first spring 22 and the second spring 24 pushes the sealing disc 16 upward, ensuring it fits tightly against the sealing groove 15. The sealing ring 18 further enhances the sealing effect, preventing sewage from flowing back into the valve body 1 and achieving the anti-backflow function. The second spring 24 and the first spring 22 work together to provide a more uniform elastic force, further improving the tightness of the fit between the sealing disc 16 and the sealing groove 15. This solves the problem of insufficient stability of the sealing assembly. Even after prolonged use, the opening of the sealing groove 15 of the sealing seat 11 is not prone to loosening, thus improving the stability of the equipment. When adjusting the valve body opening and closing, the handle 28 is manually turned, causing the screw 25 to rotate. Because the anti-rotation mechanism restricts the rotation of the bearing sleeve 3, the screw 25 moves axially under the action of the screw block 27, thereby causing the moving plate 21 to move up and down, allowing the sealing assembly to move out of the sealing groove.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drain backflow prevention check valve, comprising a valve body (1), characterized in that: The bottom of the valve body (1) is connected to a sealing seat (11), and a first pipe (12) is provided at the bottom of the sealing seat (11). A sealing groove (15) is provided in the middle of the sealing seat (11), and a liftable sealing assembly is snapped into the sealing groove (15). The sealing assembly includes a sealing disc (16) installed below the mounting plate (17). The outer edge of the sealing disc (16) is covered with a sealing ring (18). The top of the mounting plate (17) is connected to a movable plate (21) through an elastic connecting assembly. The elastic connecting assembly includes a sleeve (19) provided on the top of the mounting plate (17). A connecting rod (2) is inserted into the top opening of the cylinder (19). A first spring (22) is sleeved on the connecting rod (2). The top end of the connecting rod (2) passes through the middle through hole of the moving plate (21) and is rotatably connected to a screw (25). An installation frame (26) is provided on the top of the valve body (1). A screw block (27) is provided in the middle of the installation frame (26). The screw (25) is spirally connected to the screw block (27). An annular groove (29) is opened on the side of the screw (25), and a bearing sleeve (3) is movably sleeved in the annular groove (29). An anti-rotation mechanism is connected to the side of the bearing sleeve (3).

2. The drain backflow prevention check valve according to claim 1, characterized in that, The valve body (1) is mounted on the bracket (14), and the side opening of the valve body (1) is connected to the second pipe (13).

3. A drain backflow prevention check valve according to claim 1, characterized in that, The two ends of the first spring (22) are connected to the upper surface of the mounting plate (17) and the lower surface of the moving plate (21), respectively.

4. A drain backflow prevention check valve according to claim 1, characterized in that, The elastic connection assembly also includes a plurality of guide rods (23) fixed on the mounting plate (17), the top end of the guide rods (23) being movably inserted into the movable plate (21), and a second spring (24) being sleeved on the guide rods (23) between the mounting plate (17) and the movable plate (21).

5. A drain backflow prevention check valve according to claim 1, characterized in that, The top of the screw (25) is connected to a handle (28).

6. A drain anti-backflow check valve according to claim 1, characterized in that, The anti-rotation mechanism includes a limiting rod (31) and a limiting block (32), wherein the limiting block (32) is movably engaged in the movable groove opened in the side wall of the mounting frame (26).

7. A drain anti-backflow check valve according to claim 1, characterized in that, The valve body (1) has a through hole at the top, and a waterproof ring is provided inside the through hole.

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