A backflow prevention check device for rural sewage pumping stations

Abstract

The application relates to the technical field of backflow prevention check valves, and discloses a backflow prevention check valve for a rural sewage pump station, which comprises a valve shell, a water inlet cavity, a movable cavity and a water outlet cavity are sequentially arranged in the valve shell from right to left, the water inlet cavity, the movable cavity and the water outlet cavity are arranged in an inverted T shape, a valve core is hingedly installed on the inner wall of the valve shell in the movable cavity, two fixed blocks are fixedly installed on the side of the valve core close to the water outlet cavity, a folding plate is rotatably installed on the inner wall of the two fixed blocks, and the side, away from the fixed blocks, of the folding plate is rotatably installed on the inner wall of the valve shell. The valve core is hingedly installed on the inner wall of the valve shell, and then, when sewage backflows, the valve core rotates and resets under the cooperation of the self weight, the folding plate expands under the rotation connection of the two ends, impurities in the sewage can be effectively prevented from entering the movable cavity after the folding plate expands, the movement of the valve core is ensured, sewage backflow is prevented, and normal water flow discharge is ensured.

Description

Technical Field

[0001] This application relates to the field of backflow prevention and checkpoint technology, specifically a backflow prevention and checkpoint device for rural sewage pumping stations. Background Technology

[0002] The backflow prevention device for rural sewage pumping stations is a valve device used to prevent sewage backflow. There are many types of valves for preventing sewage backflow, such as gate valves, ball valves, check valves, and gate valves.

[0003] Currently, when water is discharged from the check valve, the valve core moves under the impact of the water flow to facilitate water flow. However, when sewage backflows, the valve core rotates and resets under its own weight to prevent sewage backflow. Sewage contains various impurities, which may enter the moving chamber during sewage backflow, affecting the rotation of the valve core and thus affecting the normal discharge of water. Utility Model Content

[0004] The purpose of this application is to provide a backflow prevention check device for rural sewage pumping stations, which solves the problem mentioned in the background art. When the check valve is in use, the valve core is moved by the impact force of the water flow to facilitate water flow. However, when sewage backflows, the valve core rotates and resets under its own weight to prevent sewage backflow. Sewage contains a variety of impurities, which may enter the moving chamber during sewage backflow, affecting the rotation of the valve core and thus affecting the normal discharge of water.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This application provides a backflow prevention device for a rural sewage pumping station, including a valve housing. The valve housing has an inlet chamber, a movable chamber, and an outlet chamber arranged sequentially from right to left. The inlet chamber, movable chamber, and outlet chamber are arranged in an inverted T-shape. A valve core is hinged to the inner wall of the valve housing inside the movable chamber. Two fixing blocks are fixedly installed on the side of the valve core near the outlet chamber. A folding plate is rotatably installed on the inner wall of the two fixing blocks. The side of the folding plate away from the fixing blocks is rotatably installed with the inner wall of the valve housing.

[0007] By adopting the above technical solution, the valve core is hinged and installed on the inner wall of the valve body. Then, when sewage backflows, the valve core rotates and resets under its own weight. The folding plate plays an unfolding role when the two ends are rotated and connected. After the folding plate is unfolded, it can effectively prevent impurities in the sewage from entering the moving chamber, thereby ensuring the movement of the valve core, preventing sewage backflow, and ensuring normal water discharge.

[0008] Optionally, a retaining ring is embedded in the inner wall of the valve housing located inside the water inlet chamber, and the retaining ring corresponds to the diameter of the valve core.

[0009] By adopting the above technical solution, the sealing effect can be initially achieved through the arrangement of the retaining ring and the valve core.

[0010] Optionally, a second sealing block is fixedly installed on the inner wall of the valve core located inside the retaining ring.

[0011] By adopting the above technical solution, the second sealing block can further seal the valve core and the retaining ring.

[0012] Optionally, a maintenance tube is welded to the upper end of the valve body located above the active cavity, and a tube cap is fixedly installed on the upper end of the maintenance tube.

[0013] By adopting the above technical solution, the valve shell can fix the maintenance tube, while the tube cover can close the maintenance tube. When the tube cover is open, it is convenient for staff to maintain and clean the moving chamber.

[0014] Optionally, a first sealing block is fixedly installed at the lower end of the pipe cover, and the first sealing block is slidably connected to the inner wall of the maintenance pipe.

[0015] By adopting the above technical solution, the first sealing block can seal the pipe cover and the maintenance pipe.

[0016] Optionally, connecting pipes are welded to both sides of the valve body, and flanges are fixedly installed on the side of the two connecting pipes away from the valve body.

[0017] By adopting the above technical solution, the valve body can fix the two sets of connecting pipes, while the flange can facilitate the connection of the connecting pipes to other external pipes.

[0018] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows:

[0019] The technical solution of this application is to install the valve core on the inner wall of the valve body through a hinge. Then, when sewage backflow occurs, the valve core rotates and resets under its own weight. The folding plate plays an unfolding role when the two ends are rotated and connected. After the folding plate is unfolded, it can effectively prevent impurities in the sewage from entering the moving chamber, thereby ensuring the movement of the valve core, preventing sewage backflow, and ensuring normal water discharge. Attached Figure Description

[0020] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 This is an axial view schematic diagram of a backflow prevention device for a rural sewage pumping station according to this application;

[0022] Figure 2This is a front cross-sectional view of a backflow prevention device for a rural sewage pumping station according to this application;

[0023] Figure 3 This application relates to a backflow prevention and check device for rural sewage pumping stations. Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 This is a left-side schematic diagram of the folding plate of a backflow prevention and check device for a rural sewage pumping station according to this application.

[0025] In the diagram: 1. Valve housing; 2. Inlet chamber; 3. Outlet chamber; 4. Movable chamber; 5. Valve core; 6. Fixed block; 7. Folding plate; 8. Maintenance pipe; 9. Pipe cover; 10. First sealing block; 11. Retaining ring; 12. Second sealing block; 13. Connecting pipe; 14. Flange. Detailed Implementation

[0026] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-4 This application provides a technical solution: a backflow prevention device for a rural sewage pumping station, including a valve shell 1. The valve shell 1 has an inlet chamber 2, a movable chamber 4 and an outlet chamber 3 arranged sequentially from right to left inside. The inlet chamber 2, the movable chamber 4 and the outlet chamber 3 are arranged in an inverted T shape. A valve core 5 is hinged to the inner wall of the valve shell 1 located inside the movable chamber 4. Two fixing blocks 6 are fixedly installed on the side of the valve core 5 near the outlet chamber 3. A folding plate 7 is rotatably installed on the inner wall of the two fixing blocks 6. The side of the folding plate 7 away from the fixing blocks 6 is rotatably installed with the inner wall of the valve shell 1.

[0028] In the technical solution of this application, the valve core 5 is hinged to the inner wall of the valve body 1. Then, when sewage backflows, the valve core 5 rotates and resets under its own weight. The folding plate 7 plays an unfolding role when the two ends are rotated and connected. After the folding plate 7 is unfolded, it can effectively prevent impurities in the sewage from entering the movable cavity 4, thereby ensuring the movement of the valve core 5, preventing sewage backflow, and ensuring normal water discharge.

[0029] In the technical solution of this application, such as Figure 1 and Figure 2As shown, a maintenance tube 8 is welded to the upper end of the valve shell 1 located above the movable chamber 4. A tube cover 9 is fixedly installed on the upper end of the maintenance tube 8. The valve shell 1 can fix the maintenance tube 8, while the tube cover 9 can close the maintenance tube 8. When the tube cover 9 is open, it is convenient for the staff to maintain and clean the movable chamber 4. A first sealing block 10 is fixedly installed on the lower end of the tube cover 9. The first sealing block 10 is slidably connected to the inner wall of the maintenance tube 8. The first sealing block 10 can seal the tube cover 9 and the maintenance tube 8.

[0030] In the technical solution of this application, such as Figure 1 and Figure 2 As shown, connecting pipes 13 are welded to both sides of the valve body 1. Flanges 14 are fixedly installed on the side of the two connecting pipes 13 away from the valve body 1. The valve body 1 can fix the two sets of connecting pipes 13, and the flanges 14 can facilitate the connection of the connecting pipes 13 to other external pipes.

[0031] In the technical solution of this application, such as Figure 2 As shown, a retaining ring 11 is embedded in the inner wall of the valve shell 1 located inside the water inlet chamber 2. The retaining ring 11 corresponds to the diameter of the valve core 5. The retaining ring 11 and the valve core 5 can initially play a sealing role. A second sealing block 12 is fixedly installed on the inner wall of the valve core 5 located inside the retaining ring 11. The second sealing block 12 can further play a sealing role for the valve core 5 and the retaining ring 11.

[0032] In use, sewage enters the inlet chamber 2 of the device from the pump station outlet through the external pipe. The impact force of the water flow acts on the surface of the valve core 5. Under the pressure of sewage, the valve core 5 rotates around the hinge axis to compress the folding plate 7 and open the channel of the movable chamber 4. Under the rotational connection between the fixed block 6 and the inner wall of the valve body 1, the folding plate 7 gradually folds and contracts as the valve core 5 opens, without obstructing the water flow. Sewage enters the outlet chamber 3 through the movable chamber 4 and is discharged to the downstream pipeline through the connecting pipe 13 on the other side, completing the normal drainage process.

[0033] When the downstream pipeline pressure is higher than the pump station outlet pressure, the sewage flows back into the outlet chamber 3, impacting the valve core 5 on the side near the outlet chamber 3. Under the action of its own weight and the reverse pressure of the backflow, the valve core 5 rotates and gradually closes the channel of the active chamber 4. The folding plate 7 unfolds synchronously with the valve core 5 as it resets, and its plate surface adheres to the inner wall of the valve shell 1 to form a physical barrier, preventing impurities in the backflow sewage from entering the active chamber 4.

[0034] The edge of the valve core 5 contacts the retaining ring 11, and the second sealing block 12 is compressed and deformed to fill the gap, forming a double sealing structure to prevent sewage leakage. After the folding plate 7 is fully unfolded, it covers the inlet of the active cavity 4, further blocking impurities and ensuring that the valve core 5 rotation mechanism is not blocked.

[0035] The folding plate 7 prevents large impurities from entering the active chamber 4 and causing obstruction to movement. However, some small particles of dust and sand may still enter the active chamber 4. Operators periodically unscrew the pipe cover 9, and the first sealing block 10 detaches from the inner wall of the maintenance pipe 8, exposing the inspection port of the active chamber 4. Through the maintenance pipe 8, the condition of the valve core 5, the folding plate 7, and the inner wall of the active chamber 4 can be observed. Any impurities or deposits that may be attached can be removed, and the rotating parts of the valve core 5 can be lubricated and maintained to ensure its flexibility. The pipe cover 9 is then reinstalled, and the first sealing block 10 is embedded in the inner wall of the maintenance pipe 8 to form a seal and prevent sewage leakage.

[0036] The opening and closing of the valve core 5 directly controls the state of the folding plate 7. The folding plate 7 not only assists the valve core 5 in its operation, but also serves as a barrier against impurities. The retaining ring 11 and the second sealing block 12 form a mechanical seal. The folding plate 7 provides physical isolation, providing double protection against backflow. The maintenance pipe 8 is designed to be cleaned without disassembling the device, reducing maintenance costs.

[0037] Through the above process, this device effectively solves the problem of traditional check valves being easily clogged by impurities, achieving efficient and reliable backflow prevention in rural sewage pumping stations, while also facilitating daily maintenance and extending the service life of the equipment.

Claims

1. A backflow prevention device for rural sewage pumping stations, characterized in that: The valve includes a valve housing (1), and the interior of the valve housing (1) is provided with an inlet chamber (2), a movable chamber (4) and an outlet chamber (3) from right to left. The inlet chamber (2), the movable chamber (4) and the outlet chamber (3) are arranged in an inverted T shape. A valve core (5) is hinged to the inner wall of the valve housing (1) located inside the movable chamber (4). Two fixing blocks (6) are fixedly installed on the side of the valve core (5) near the outlet chamber (3). A folding plate (7) is rotatably installed on the inner wall of the two fixing blocks (6). The side of the folding plate (7) away from the fixing blocks (6) is rotatably installed with the inner wall of the valve housing (1).

2. The backflow prevention device for a rural sewage pumping station according to claim 1, characterized in that, A retaining ring (11) is embedded in the inner wall of the valve housing (1) located inside the water inlet chamber (2), and the retaining ring (11) corresponds to the diameter of the valve core (5).

3. The backflow prevention device for a rural sewage pumping station according to claim 1, characterized in that, A second sealing block (12) is fixedly installed on the inner wall of the valve core (5) located inside the retaining ring (11).

4. The backflow prevention device for a rural sewage pumping station according to claim 1, characterized in that, A maintenance tube (8) is welded to the upper end of the valve body (1) located above the active cavity (4), and a tube cap (9) is fixedly installed on the upper end of the maintenance tube (8).

5. A backflow prevention and check device for rural sewage pumping stations according to claim 4, characterized in that, The lower end of the pipe cap (9) is fixedly installed with a first sealing block (10), and the first sealing block (10) is slidably connected to the inner wall of the maintenance pipe (8).

6. A backflow prevention and check device for rural sewage pumping stations according to claim 1, characterized in that, Connecting pipes (13) are welded to both sides of the valve body (1), and flanges (14) are fixedly installed on the side of the two connecting pipes (13) away from the valve body (1).

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