Sealing structure of submersible sewage pump

Abstract

The utility model relates to the technical field of sewage pumps, and discloses a submersible sewage pump sealing structure which comprises a pump body, the outer bottom end of the pump body is fixedly connected with a connecting shell, the outer left side of the connecting shell is fixedly connected with a flange plate, and the other end of the flange plate is fixedly connected with a connecting pipe. The other end of the connecting pipe is fixedly connected with a pipeline opening and closing mechanism, and the top of the pipeline opening and closing mechanism is fixedly connected with a sealing ring. According to the rubber conveying pipe, air can push a groove ring to push a first spring to move in the outer pipe, then the first spring can deform, a rubber clamping plate can be attached to the interior of the groove ring through a through hole of the inner pipe, and then water flow can smoothly flow out through the rubber conveying pipe; and when the air pump stops outputting, the first spring rebounds, and then the rubber conveying pipe can be clamped by the rubber clamping plate.

Description

Technical Field

[0001] This utility model relates to the field of sewage pump technology, and in particular to a sealing structure for a submersible sewage pump. Background Technology

[0002] Sewage pumping stations play a crucial role in the collection and transportation of urban sewage. Submersible sewage pumps are commonly used to lift sewage from lower to higher elevations for transport to sewage treatment plants. Their sealed structure prevents sewage leakage, avoids pollution of the surrounding environment, and ensures that sewage flows efficiently and safely through the pipelines.

[0003] A search revealed Chinese Patent Publication No. CN217682430U, a utility model relating to an inlet sealing structure for a submersible sewage pump. The structure includes an inlet bell-shaped tube and a rubber liner. One end of the inlet bell-shaped tube is connected to the submersible sewage pump, and the other end is connected to the pump's suction pipe. A groove for installing the rubber liner is provided inside the inlet bell-shaped tube, with the liner positioned within the groove near the end where the suction pipe is installed. During installation, the rubber liner inside the inlet bell-shaped tube is coupled to the suction pipe of the submersible sewage pump to complete the installation and sealing of the suction pipe and the pump inlet. The inlet bell-shaped tube has a tapered structure, and the angle between the tapered tube and the end connected to the suction pipe ranges from 8° to 20°. This utility model provides a convenient submersible sewage pump inlet sealing structure that eliminates the need for pump shutdown and drainage, disassembly of the suction pipe, entry into a water tank, and replacement of the sealing gasket each time, thus achieving coupling and sealing between the pump inlet and the suction pipe.

[0004] However, the specific implementation of the aforementioned patent mentions that "the inlet bell pipe is installed at the pump inlet, adopts a tapered pipe structure with an angle of 10°, and has a 5mm deep groove inside for the soft rubber gasket to be fitted; the soft rubber gasket is made of GGC410 material, with a thickness of 5mm, and is fitted into the groove inside the inlet bell pipe. It is relatively soft and easy to fit with the suction pipe and seal tightly." Although the special design of the pipe and the combination of the soft rubber gasket can achieve the sealing of the pipe, it cannot achieve a completely sealed opening and closing. This means that there will be gaps when the pipe is connected or disconnected. During the operation of the pump, some liquid will leak out from these gaps, resulting in a reduction in the actual flow rate transported through the pipe, affecting the working efficiency of the entire drainage or sewage system, and failing to meet the predetermined flow rate requirements. In response to the above problems, a submersible sewage pump sealing structure is now proposed. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a sealing structure for a submersible sewage pump, which aims to improve the problem that some devices in the prior art cannot seal and open / close the pipeline.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A sealing structure for a submersible sewage pump includes a pump body, a connecting shell fixedly connected to the bottom of the pump body, a flange fixedly connected to the left side of the connecting shell, a connecting pipe fixedly connected to the other end of the flange, a pipe opening and closing mechanism fixedly connected to the other end of the connecting pipe, a sealing ring fixedly connected to the top of the pipe opening and closing mechanism, and an anti-backflow mechanism fixedly connected to the outside of the sealing ring.

[0008] The pipe opening and closing mechanism includes an outer pipe, a driving component is provided on the outside of the outer pipe, an inner pipe is fixedly connected to the inside of the outer pipe, a cavity is provided inside the outer pipe, a spring is sleeved on the outside of the inner pipe, a rubber conveying pipe is fixedly connected to the inside of the inner pipe, rubber clamps are slidably connected to the through holes on the outside of the inner pipe, and the outside of the outer pipe is fixedly connected to the top of the connecting pipe.

[0009] Through the above technical solution, the pump body serves as the core, with its bottom firmly connected to the connecting shell. On the left side of the connecting shell, a flange is tightly fixed and securely connected to one end of the connecting pipe via bolts and other connectors, ensuring the sealing and stability of the sewage conveying channel. The other end of the connecting pipe is connected to the crucial pipe opening and closing mechanism. An anti-backflow mechanism is also connected to the outside of the pump body to prevent sewage backflow. The pipe opening and closing mechanism includes an outer pipe with a drive component on its exterior, which can flexibly control the opening and closing of the mechanism according to actual needs. An inner pipe is fixed inside the outer pipe, forming a cavity between them. A spring is fitted around the outside of the inner pipe to provide elastic support. Inside the inner pipe, a rubber conveying pipe is firmly fixed to ensure smooth sewage conveying. Rubber clamps are slidably connected to the through holes on the outside of the inner pipe, which can precisely control the opening and closing of the inner pipe under the action of the drive component. The outer pipe is securely connected to the top of the connecting pipe, allowing the entire sewage discharge process to operate stably.

[0010] As a further description of the above technical solution:

[0011] The drive assembly includes a waterproof air pump, a grooved ring is slidably connected inside the inner tube, and the waterproof air pump is fixedly connected to the outside of the top end of the outer tube.

[0012] The above technical solution mainly consists of a waterproof air pump, which has excellent waterproof performance and can operate stably in humid environments. Its exterior is firmly fixed to the top of the outer tube to ensure a stable connection. A grooved ring is slidably connected inside the inner tube. When the waterproof air pump is started, it will generate a corresponding change in air pressure. The air pressure is transmitted through the cavity between the outer and inner tubes, pushing the grooved ring to slide inside the inner tube. The sliding of the grooved ring will in turn drive the rubber clamp to move, thereby realizing the control of the opening and closing of the rubber conveying pipe and precisely regulating the conveying of sewage.

[0013] As a further description of the above technical solution:

[0014] The anti-backflow mechanism includes an anti-backflow pipe, a through-hole plate fixedly connected to the top of the anti-backflow pipe, a housing fixedly connected to the bottom of the through-hole plate, a sliding rod slidably connected inside the housing, a reset assembly sleeved on the outside of the sliding rod, a sealing plate fixedly connected to the bottom of the sliding rod, and the inside of the anti-backflow pipe fixedly connected to the outside of the sealing ring.

[0015] Through the above technical solution, the anti-backflow mechanism is crucial for the submersible sewage pump. A through-hole plate is fixed inside the anti-backflow pipe, through which sewage can flow. The housing is connected below the through-hole plate, and the internal sliding rod can move flexibly. A reset component is sleeved on the outside of the sliding rod. Under normal conditions, under the action of the reset component, the sealing plate at the bottom of the sliding rod is tightly attached to the through-hole plate to prevent sewage backflow. Once the pump is working normally, the sewage pressure pushes open the sealing plate to achieve forward flow. The anti-backflow pipe is firmly connected to the outside of the sealing ring, providing all-round protection for the sewage system and eliminating the risk of sewage backflow.

[0016] As a further description of the above technical solution:

[0017] The reset assembly includes a second spring, which is sleeved on the outside of the sliding rod and fixedly connected to the outside of the sealing plate.

[0018] Through the above technical solution, the reset component is the key part of the anti-backflow mechanism, with spring two at its core. Spring two is tightly fitted around the outside of the sliding rod, with one end firmly fixed to the sealing plate to ensure a stable connection. When sewage flows forward, the pressure pushes the sealing plate and sliding rod upward, compressing spring two and storing elastic potential energy. Once the pump stops working and the sewage pressure disappears, spring two quickly releases its energy, using its strong rebound force to push the sliding rod and sealing plate back to their original positions, tightly sealing the sealing plate and effectively preventing sewage backflow. This ensures the stable operation of the submersible sewage pump and avoids equipment damage and secondary pollution caused by backflow.

[0019] As a further description of the above technical solution:

[0020] The flange is externally threaded with multiple fixing bolts, and the bottom of the connecting shell is fixedly connected with a base.

[0021] Through the above technical solution, the flange, as a key connecting component between the connecting shell and the connecting pipe, plays a crucial role in ensuring sealing and stability. Multiple threaded holes are evenly distributed on its exterior, accommodating corresponding fixing bolts. During installation, the fixing bolts are screwed into the threaded holes sequentially, and the tightening operation ensures the flange fits tightly against the connecting pipe and the connecting shell, effectively preventing sewage leakage. At the bottom of the connecting shell, a base is firmly welded. The base, made of high-strength material, not only provides solid support for the entire submersible sewage pump's sealing structure but also disperses the vibration and pressure generated during pump operation, ensuring stable operation of the equipment under various working conditions.

[0022] As a further description of the above technical solution:

[0023] A fixing ring is fixedly connected to the outer top end of the pump body, and a pull ring is fixedly connected to the top of the pump body;

[0024] Through the aforementioned technical solution, a carefully designed and securely fixed retaining ring is attached to the outer top of the pump body. The retaining ring is made of sturdy and durable metal, capable of withstanding significant tensile force, and is equipped with a pull ring. The pull ring's ergonomic design facilitates lifting and operation by workers. Whether during equipment installation, inspection, hoisting, or routine maintenance of the pump body, the pull ring provides a convenient leverage point, greatly improving operational convenience and safety.

[0025] As a further description of the above technical solution:

[0026] The outer side of the rubber clamp is slidably connected to the inside of the inner tube, and the outer side of the rubber clamp is in close contact with the outer side of the rubber conveying tube;

[0027] Through the above technical solution, the rubber clamp plays a crucial role in flow control within the pipe opening and closing mechanism. Its exterior can slide smoothly inside the inner tube thanks to the finely polished inner wall of the tube and the rubber clamp's dimensions being matched to the inner diameter of the inner tube, ensuring smooth sliding. The exterior of the rubber clamp fits tightly against the exterior of the rubber conveying pipe. The rubber clamp is made of rubber with good elasticity and wear resistance, forming a tight seal when fitted against the rubber conveying pipe. When the rubber clamp slides to a specific position within the inner tube, it precisely controls the opening and closing of the rubber conveying pipe, effectively regulating the sewage flow rate and ensuring the stable operation of the submersible sewage pump.

[0028] As a further description of the above technical solution:

[0029] One end of the spring is fixedly connected to the outside of the grooved ring, and the other end of the spring is fixedly connected to the inside of the outer tube.

[0030] Through the above technical solution, spring one is a key elastic component in the pipe opening and closing mechanism of the submersible sewage pump, connecting the grooved ring and the outer pipe. One end of spring one is precisely and firmly fixed to the outside of the grooved ring, and the connection process ensures that it will not loosen during frequent expansion and contraction. The other end of spring one is tightly connected to the inside of the outer pipe, providing stable support for the entire connection structure. When the waterproof air pump operates and pushes the grooved ring to slide inside the inner pipe, spring one expands and contracts accordingly.

[0031] This utility model has the following beneficial effects:

[0032] 1. In this utility model, by starting the waterproof air pump, gas is injected into the cavity, which in turn pushes the grooved ring and spring 1 to move inside the outer tube, causing the spring 1 to deform. This allows the rubber clamp to fit into the inside of the grooved ring through the through hole of the inner tube, allowing water to flow smoothly out through the rubber delivery pipe. When the air pump stops outputting, the spring 1 rebounds, causing the rubber clamp to lock the rubber delivery pipe. This prevents a completely sealed opening and closing, meaning that there will be gaps when the pipe is connected or disconnected. During pump operation, some liquid will leak out from these gaps.

[0033] 2. In this utility model, the water flow impacts the sealing plate, which causes the sliding rod to slide inside the housing, causing the second spring to deform. This allows the water to flow out through the through-hole plate. When the water flow stops, the second spring rebounds, allowing the sliding rod to fit tightly against the outside of the sealing ring through the sealing plate, thus preventing water from flowing back into the pump body. Attached Figure Description

[0034] Figure 1 This is a three-dimensional schematic diagram of a sealing structure for a submersible sewage pump proposed in this utility model;

[0035] Figure 2 This is a schematic diagram of the structure of the rubber clamp of the sealing structure of the submersible sewage pump proposed in this utility model;

[0036] Figure 3 This is a schematic diagram of the base of a submersible sewage pump sealing structure proposed in this utility model;

[0037] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0038] Legend:

[0039] 1. Pump body; 2. Connecting shell; 3. Flange; 4. Connecting pipe; 5. Pipe opening and closing mechanism; 501. Outer pipe; 502. Waterproof air pump; 503. Cavity; 504. Groove ring; 505. Spring 1; 506. Inner pipe; 507. Rubber clamping plate; 508. Rubber conveying pipe; 6. Anti-backflow mechanism; 601. Anti-backflow pipe; 602. Through-hole plate; 603. Shell; 604. Sliding rod; 605. Spring 2; 606. Sealing plate; 7. Sealing ring; 8. Fixing bolt; 9. Base; 10. Fixing ring; 11. Pull ring. Detailed Implementation

[0040] 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.

[0041] Reference Figures 1 to 3 This utility model provides an embodiment of a submersible sewage pump sealing structure, including a pump body 1. The pump body 1 can withstand the impact of sewage from the submersible sewage pump during operation and the pressure generated by the high-speed rotation of the internal impeller. A connecting shell 2 is fixedly connected to the bottom of the pump body 1, and its internal flow channel is precisely connected to the flow channel of the pump body 1 to ensure that sewage can pass smoothly. A flange 3 is fixedly connected to the left side of the connecting shell 2 to ensure the sealing and stability when connected to the connecting pipe 4 and the connecting shell 2. A connecting pipe 4 is fixedly connected to the other end of the flange 3. The wall thickness of the connecting pipe 4 is reasonably designed according to the actual operating pressure and conveying distance to ensure that it will not crack or deform under certain pressure. A pipe opening and closing mechanism 5 is fixedly connected to the other end of the connecting pipe 4. A sealing ring 7 is fixedly connected to the top of the pipe opening and closing mechanism 5. The sealing ring 7 fills the gap between the connecting parts through its own elastic deformation to prevent sewage leakage. An anti-backflow mechanism 6 is fixedly connected to the outside of the sealing ring 7.

[0042] Specifically, the submersible sewage pump body 1 can withstand working pressure, and its bottom connecting shell 2 is precisely aligned with the flow channel of the pump body 1. The flange 3 on the left side of the connecting shell 2 ensures a tight connection, and it is connected to the connecting pipe 4. The connecting pipe 4 is designed with a wall thickness according to actual conditions. The pipe opening and closing mechanism 5 connected to the other end of the connecting pipe 4 has a sealing ring 7 at the top, which prevents leakage through elastic deformation. The backflow prevention mechanism 6 outside the sealing ring 7 prevents sewage backflow. All components work together to ensure smooth sewage transportation without leakage.

[0043] The anti-backflow mechanism 6 includes an anti-backflow pipe 601. A perforated plate 602 is fixedly connected to the top of the anti-backflow pipe 601. The perforated plate 602 ensures smooth passage of sewage while also filtering larger impurities. A housing 603 is fixedly connected to the bottom of the perforated plate 602. A sliding rod 604 is slidably connected inside the housing 603, with high precision fitting with the sliding hole of the housing 603 to ensure smooth sliding without wobbling or deviation. A reset assembly is sleeved on the outside of the sliding rod 604. Including spring 605, spring 605 ensures that while meeting the reset requirement of sealing plate 606, the normal operation of anti-backflow mechanism 6 will not be affected by excessive or insufficient elasticity. Spring 605 is sleeved on the outside of sliding rod 604 and fixedly connected to the outside of sealing plate 606. Sealing plate 606 is fixedly connected to the bottom of sliding rod 604. The shape of sealing plate 606 is designed to fit tightly against the bottom of sealing ring 7 to prevent sewage backflow. Anti-backflow pipe 601 is fixedly connected to the outside of sealing ring 7.

[0044] Specifically, the anti-backflow mechanism 6 has a through-hole plate 602 at the top of the anti-backflow pipe 601, which allows sewage to pass through and filters impurities. The through-hole plate 602 is connected to the housing 603, which contains a sliding rod 604. The sliding rod 604 is fitted with a second spring 605, which ensures that the sealing plate 606 is reset and has appropriate elasticity. The second spring 605 is connected to the sealing plate 606. The bottom end of the sliding rod 604 is also connected to the sealing plate 606, which fits against the bottom of the sealing ring 7 to prevent backflow. The anti-backflow pipe 601 is fixed outside the sealing ring 7. All components work together to effectively prevent sewage backflow.

[0045] The pipe opening and closing mechanism 5 includes an outer pipe 501, which provides a stable installation space and protective shell for the inner pipe 506, preventing the inner pipe 506 from being affected by the external environment. A drive assembly is installed on the outside of the outer pipe 501, including a waterproof air pump 502. The shell of the waterproof air pump 502 is made of waterproof and corrosion-resistant material, enabling it to work stably for extended periods in humid environments. A grooved ring 504 is slidably connected inside the inner pipe 506. The grooved ring 504 is designed to fit tightly with the inner pipe 506, allowing for smooth and unobstructed sliding within the inner pipe. The groove serves to fix and guide the spring 505, ensuring that it does not shift during extension and retraction. The waterproof air pump 502 is externally fixed to the top of the outer tube 501. An inner tube 506 is fixedly connected inside the outer tube 501. The inner tube 506 has a certain strength and flexibility, capable of withstanding pressure and deformation. A cavity 503 is provided inside the outer tube 501. The spring 505 is sleeved on the outside of the inner tube 506. The spring 505 provides appropriate elastic force when the groove ring 504 moves, allowing the rubber clamp 50... 7. The spring 505 can open and close accurately. One end of the spring 505 is fixedly connected to the outside of the grooved ring 504, and the other end of the spring 505 is fixedly connected to the inside of the outer tube 501. A rubber conveying tube 508 is fixedly connected inside the inner tube 506. The rubber conveying tube 508 is made of corrosion-resistant and wear-resistant rubber material, possessing good flexibility and elasticity. It can adapt to the chemical properties and flow characteristics of sewage, ensuring smooth passage of sewage. Rubber clamps 507 are slidably connected to the external through holes of the inner tube 506. The surface of the rubber clamps 507 is specially treated to increase... To reduce friction and ensure a tight seal between the rubber conveying pipe 508 and the outer tube 501, sewage leakage can be effectively prevented. The outer side of the rubber clamp 507 is slidably connected to the inside of the inner tube 506, and the outer side of the rubber clamp 507 is tightly fitted to the outer side of the rubber conveying pipe 508. The outer side of the outer tube 501 is fixedly connected to the outer top of the connecting pipe 4. When the rubber clamp 507 squeezes the rubber conveying pipe 508, the rubber conveying pipe 508 deforms and closes, preventing sewage flow. When the rubber clamp 507 is released, the rubber conveying pipe 508 returns to its original shape under its own elasticity, and the sewage can continue to flow.

[0046] Specifically, the outer tube 501 provides a stable installation space and protection for the inner tube 506. The outer waterproof air pump 502 has a waterproof and corrosion-resistant outer shell, enabling stable operation in humid environments. The inner tube 506 has a slidingly connected grooved ring 504, with the groove serving as a guide for a spring 505. A corrosion-resistant and wear-resistant rubber delivery pipe 508 is fixed inside the inner tube 506, and a rubber clamping plate 507 is slidably connected to its external through-hole. The rubber clamping plate 507 fits tightly with the rubber delivery pipe 508 to prevent leakage. When the waterproof air pump 502 drives the grooved ring 504, the rubber clamping plate 507 squeezes or releases the rubber delivery pipe 508, controlling or blocking sewage flow.

[0047] Reference Figures 2 to 4 The flange 3 has multiple fixing bolts 8 on its external threaded connection. The threads of the fixing bolts 8 are clear and regular, matching the threaded holes on the flange 3 to ensure the tightness and stability of the connection. The bottom of the connecting shell 2 is fixedly connected to a base 9. The base 9 has a large bottom area to increase the contact area with the mounting surface and improve stability. The top of the pump body 1 is fixedly connected to a fixing ring 10, and the top of the pump body 1 is fixedly connected to a pull ring 11. The pull ring 11 is designed to be easy for the operator to hold, and its surface is treated with anti-slip treatment to increase friction and facilitate better force application when handling or installing the pump body 1.

[0048] Specifically, first, the base 9 is fixed to the bottom of the connecting shell 2. The base 9 increases the contact area with the mounting surface, improving overall stability. Then, the pump body 1 is secured in a specific position using the fixing ring 10. The pull ring 11 at the top of the pump body 1 is ergonomically designed for easy gripping by operators, and its non-slip surface facilitates force application during handling or installation. Next, the connecting pipe 4 is connected to the connecting shell 2 via the flange 3. Multiple fixing bolts 8 are threaded onto the outside of the flange 3, with the bolts and threaded holes tightly matched to ensure a tight and secure connection. All components are installed according to this process to ensure the stable operation of the submersible sewage pump's sealing structure.

[0049] Working principle: When the rubber delivery tube 508 is opened and closed, the waterproof air pump 502 is started, which fills the cavity 503 with gas. The gas then pushes the grooved ring 504 to push the spring 505 inside the outer tube 501, causing the spring 505 to deform. This allows the rubber clamp 507 to fit against the inside of the grooved ring 504 through the through hole of the inner tube 506, allowing water to flow smoothly out of the rubber delivery tube 508. When the air pump stops outputting, the spring 505 rebounds, causing the rubber clamp 507 to lock the rubber delivery tube 508. The rebound of the spring 505 causes the grooved ring 504 to reset, thus locking the rubber delivery tube 508 and preventing water flow.

[0050] When preventing backflow of water, the water flow impacts the sealing plate 606, causing the sliding rod 604 to slide inside the housing 603. This causes the second spring 605 to deform, allowing the water to flow out through the through-hole plate 602. When the water flow stops, the second spring 605 rebounds, allowing the sliding rod 604 to fit tightly against the outside of the sealing ring 7 through the sealing plate 606, thus preventing water from flowing back into the pump body 1.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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.

Claims

1. A submersible sewage pump sealing structure comprising a pump body (1), characterized in that: A connecting shell (2) is fixedly connected to the bottom of the pump body (1). A flange (3) is fixedly connected to the left side of the connecting shell (2). A connecting pipe (4) is fixedly connected to the other end of the flange (3). A pipe opening and closing mechanism (5) is fixedly connected to the other end of the connecting pipe (4). A sealing ring (7) is fixedly connected to the top of the pipe opening and closing mechanism (5). An anti-backflow mechanism (6) is fixedly connected to the outside of the sealing ring (7). The pipe opening and closing mechanism (5) includes an outer tube (501), a driving component is provided on the outside of the outer tube (501), an inner tube (506) is fixedly connected inside the outer tube (501), a cavity (503) is provided inside the outer tube (501), a spring (505) is sleeved on the outside of the inner tube (506), a rubber delivery tube (508) is fixedly connected inside the inner tube (506), and rubber clamps (507) are slidably connected to the through holes on the outside of the inner tube (506). The outside of the outer tube (501) is fixedly connected to the top of the connecting pipe (4).

2. The seal structure for submersible sewage pump according to claim 1, characterized in that: The drive assembly includes a waterproof air pump (502), and a grooved ring (504) is slidably connected to the outside of the inner tube (506). The waterproof air pump (502) is fixedly connected to the outside of the top end of the outer tube (501).

3. The seal structure for submersible sewage pump according to claim 1, characterized in that: The anti-backflow mechanism (6) includes an anti-backflow pipe (601), with a through-hole plate (602) fixedly connected inside the top end of the anti-backflow pipe (601), and a housing (603) fixedly connected to the bottom outer end of the through-hole plate (602). A sliding rod (604) is slidably connected inside the housing (603), and a reset assembly is sleeved on the outside of the sliding rod (604). A sealing plate (606) is fixedly connected to the bottom outer end of the sliding rod (604), and the inside of the anti-backflow pipe (601) is fixedly connected to the outside of the sealing ring (7).

4. A submersible sewage pump sealing structure according to claim 3, wherein: The reset assembly includes a second spring (605), which is sleeved on the outside of the sliding rod (604) and is fixedly connected to the outside of the sealing plate (606).

5. The seal structure for submersible sewage pump according to claim 1, characterized in that: The flange (3) is externally threaded with multiple fixing bolts (8), and the bottom of the connecting shell (2) is fixedly connected with a base (9).

6. A submersible sewage pump sealing structure according to claim 1, characterized in that: A fixing ring (10) is fixedly connected to the outer top of the pump body (1), and a pull ring (11) is fixedly connected to the top of the pump body (1).

7. A submersible sewage pump sealing structure according to claim 2, wherein: The outer side of the rubber clamp (507) is slidably connected to the inside of the inner tube (506), and the outer side of the rubber clamp (507) is tightly fitted to the outer side of the rubber delivery tube (508).

8. The seal structure for submersible sewage pump according to claim 2, characterized in that: One end of the spring (505) is fixedly connected to the outside of the grooved ring (504), and the other end of the spring (505) is fixedly connected to the inside of the outer tube (501).

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