Drainage well lid capable of accelerating drainage and working method of drainage well lid

Abstract

The invention discloses a drainage well lid capable of accelerating drainage and a working method of the drainage well lid, relates to the related field of urban drainage, and aims to solve the problems that in the prior art, when the rain vigor is large, a large amount of dirt is wrapped into the well lid, drainage holes are blocked due to flowing drainage of water, and the possibility of blockage of the drainage holes is increased when the water forms vortexes to flow out in an accelerated mode. A middle block is arranged at the lower end in the lower well body, an inner driving cavity is formed in the middle block, a lower fixing plate is rotationally connected to the lower end in the inner driving cavity, a rotating assembly is arranged at the lower end of the middle block and comprises a middle shaft body and a rotating part, and the rotating direction side of the rotating part is arranged to be a triangular arc surface; a dirt collecting area is arranged in the outer intercepting well along the outer portion of the range where the rotating assembly is located, a plurality of lower water leakage holes are formed in the end face of the lower sealing plate along the lower end of the range where the rotating assembly is located in a penetrating mode, and the lower end face of the rotating piece is attached to the upper end face of the lower sealing plate.

Description

Technical Field

[0001] This invention relates to the field of urban drainage, specifically to a drainage well cover for accelerating drainage and its working method. Background Technology

[0002] As densely populated areas with frequent economic activities, cities rely on a well-developed infrastructure system for their normal operation. Among these systems, urban drainage systems are a key component in ensuring urban safety, sanitation, and sustainable development. The main function of urban drainage systems is to promptly remove surface runoff and rainwater from urban areas, preventing urban flooding and avoiding damage to urban traffic, residents' lives, and buildings caused by accumulated water.

[0003] Drainage manhole covers are an indispensable and important component of urban drainage systems. They are typically installed at the inlet of drainage pipes, covering the opening of the manhole. Drainage manhole covers prevent pedestrians and vehicles from accidentally falling into the manholes, ensuring the safety of people and vehicles.

[0004] With the accelerating pace of urbanization and the continuous expansion of urban areas, the impermeable surface area of ​​cities has increased dramatically. This prevents rainwater from naturally infiltrating into the ground, increasing the surface runoff coefficient and resulting in a large amount of surface runoff during heavy rain. Therefore, it is necessary to improve the design of drainage manhole covers to accelerate drainage. For example, the Chinese authorized patent CN211621702U (A ductile iron manhole cover for convenient and accelerated drainage) includes a manhole cover plate and a manhole cover body. A filter plate is fixedly installed on the upper inner surface of the manhole cover plate, and a fixing block is fixedly connected to the inner surface of the filter plate. The upper surface of the fixing block is penetrated by bolts. The bottom surface of the manhole cover plate is fixedly connected to the manhole cover body, and an annular block penetrates the inner surface of the manhole cover body. A fixing rod is fixedly connected to the inner surface of the annular block, and a cylindrical block is fixedly connected to the end of the fixing rod. A protrusion is fixedly connected to the inner surface of the cylindrical block. This ductile iron manhole cover, designed for convenient and rapid drainage, filters water through a large-area filter plate, allowing for a greater water intake. When faster drainage is needed, the bolts can be unscrewed, and the squeeze rod can be quickly pressed with a tool to cause the fan blades to rotate, creating a vortex for rapid drainage.

[0005] While the aforementioned existing technologies can accelerate drainage, they require manual operation to rotate the fan blades and create a vortex. During heavy rain, the drainage pressure of each drainage well cover is high, making it impossible to equip each drainage well cover with staff to assist in drainage. Furthermore, during heavy rain, a large amount of sewage is carried in and discharged due to the flow of water, clogging the drainage holes. When the water forms a vortex and flows out faster, it may actually increase the possibility of sewage clogging the drainage holes. Summary of the Invention

[0006] The purpose of this invention is to provide a drainage well cover and its working method that accelerates drainage, in order to solve the problems mentioned in the background art, such as the large amount of sewage being carried in during heavy rain and being discharged and blocked by the flow of water, and the possibility of drainage hole blockage being increased when water forms a vortex and flows out faster.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a drainage well cover for accelerating drainage, comprising an annular support platform, a lower well body fixed to the lower end of the annular support platform, an outer intercepting well fixed to the lower end of the lower well body, the inner diameter of the outer intercepting well being larger than the inner diameter of the lower well body, a lower sealing plate provided on the lower end face of the outer intercepting well, an intermediate sealing baffle provided at the lower end of the lower well body, the intermediate sealing baffle being fixed to the lower well body by a plurality of annular array triangular connectors, an inner driving cavity being provided inside the intermediate sealing baffle, and a lower fixing plate being rotatably connected to the lower end of the inner driving cavity. The lower end of the intermediate sealing block is provided with a rotating assembly, which includes an intermediate shaft and rotating parts. Multiple rotating parts are arranged in a circular array outside the intermediate shaft. The upper end of the intermediate shaft extends upward into the inner drive cavity and is connected to a lower fixing plate. The rotating part is configured with a triangular arc surface on the side facing the rotation direction, and a straight surface on the other side. A dirt collection area is provided inside the outer interception well along the outer edge of the rotating assembly. Several lower drainage holes are opened through the lower end of the rotating assembly on the end face of the lower sealing plate. The lower end face of the rotating part is attached to the upper end face of the lower sealing plate.

[0008] Preferably, an intermediate layer plate is fixed in the middle of the lower well body, and an intermediate rotating shaft is rotatably connected to the lower end of the intermediate layer plate. A rotating fan is installed on the upper end of the outer side of the intermediate rotating shaft.

[0009] Preferably, the lower end of the intermediate shaft extends into the inner drive cavity and is fixed with a central gear. Multiple planetary gears are installed inside the inner drive cavity along the cross direction outside the central gear. The planetary gears mesh with the central gear. An external gear ring is installed inside the inner drive cavity along the outside of the multiple planetary gears. The external gear ring meshes with all of the multiple planetary gears. The external gear ring is located on the outer periphery of the upper end of the lower fixed plate and is fixed to the lower fixed plate.

[0010] Preferably, a plurality of external overflow components are installed in a ring array on the upper part of the outer interception well. Each external overflow component includes an overflow pipe with an "L"-shaped structure. The outer end of the overflow pipe extends to the outside of the outer interception well and is integrally connected to an overflow pipe.

[0011] Preferably, the lower end face of the overflow pipe has a centrally located lower opening with a diameter larger than that of the lower drain hole. A central float is provided at the lower end of the overflow pipe with a diameter larger than that of the lower opening. The upper end of the central float is connected to the inflection point inside the overflow pipe by a pressure spring.

[0012] Preferably, the inner surface of the annular support platform is set as an inwardly inclined annular surface, a fixed column is fixed at the upper end of the intermediate layer plate, and an inverted conical platform is fixed at the upper end of the fixed column. The inverted conical platform is located in the space inside the inwardly inclined annular surface, and a water flow cavity is formed between the annular support platform and the inverted conical platform.

[0013] Preferably, four spiral plates are fixed in a ring array between the lower well body and the fixed column along the upper end of the intermediate layer plate, forming four spiral acceleration channels between the spiral plates, the lower well body and the fixed column, and four drain outlets are fixed through the end face of the intermediate layer plate. The drain outlets are located at the lower end of the spiral acceleration channels and are inclined along the spiral direction of the spiral acceleration channels. The rotating fan includes multiple inclined fan blades in a ring array, and the inclined fan blades are inclined towards the drain outlets.

[0014] Preferably, the outer perimeter of the upper end face of the intermediate seal is configured as an upwardly inclined annular surface, and the interior of the lower well body is configured as a flow zone along the outer side of the intermediate seal.

[0015] Preferably, the upper end of the inner wall of the annular support platform is provided with a support step edge, and the upper end of the support step edge of the inner wall of the annular support platform is provided with an interception cover, and the interception cover is provided with a plurality of upper interception grooves.

[0016] A working method includes the following steps: Step 1: After the water is initially intercepted by the upper interception groove on the interception cover, it enters the water flow chamber, then flows downward through the spiral acceleration channel, and flows out through the drain outlet; Step 2: Water enters the inner area of ​​the outer interception well through the area where the drive fan is located and the flow area, and flows out through the lower drain hole. The dirt carried by the water will stick tightly to the upper part of the lower sealing plate due to the downward force of the water flow. Step 3: When the water passes through the area where the rotating fan is located, the spiral flow direction given by the spiral acceleration channel and the drain outlet hits the inclined surface of the inclined fan blades on the rotating fan, causing the rotating fan to rotate and giving the central shaft a rotating driving force. Step 4: The intermediate shaft drives the central gear to rotate clockwise, the planetary gears meshing with the central gear rotate synchronously in the opposite direction, and the external gear ring meshing with the planetary gears rotates counterclockwise, driving the intermediate shaft on the rotating assembly to rotate. Step 5: The counterclockwise rotation of the rotating part pushes the dirt along the triangular arc surface, and the dirt is pushed into the dirt collection area, and the lower drain hole is exposed again to ensure the outflow of water; Step Six: When the rainfall is too heavy, the water level in the outer interception well will rise. When the water level exceeds the position of the middle float inside the overflow pipe, it will cause the middle float to rise, and the water will overflow through the overflow pipe and the overflow pipe.

[0017] Compared with the prior art, the beneficial effects of the present invention are: (1) In this invention, the water flow velocity acts on other structures, and the rotating components can rotate by the cooperation of other structures and rotating components. Since the counterclockwise rotation surface of the rotating component is a triangular arc surface, and the lower end surface of the rotating component is in close contact with the upper end surface of the lower sealing plate, the counterclockwise rotation of the rotating component will push the dirt along the triangular arc surface. The dirt is pushed into the dirt collection area, and the lower drain hole is exposed again. The outflow of water will block the drainage channel in real time. The cooperation between the rotating component and the dirt collection area can automatically push the dirt in the water into the dirt collection area, prevent the dirt from blocking the drainage channel, realize the smooth flow of the lower drain hole, ensure the long-term stable operation of the drainage system, and reduce the processing pressure of the underground pipe network system.

[0018] (2) In this invention, the spiral acceleration channel design enables the water to obtain spiral acceleration during the flow process, which greatly improves the drainage speed, effectively copes with various rain conditions, and reduces the occurrence of water accumulation. At the same time, the spiral acceleration channel gives the water a spiral flow direction, so that the water will hit the inclined surface of the inclined fan blades on the rotating fan, drive the rotating fan to rotate, and give the intermediate rotating shaft a rotation driving force to complete the function of preventing dirt from clogging the lower drain hole.

[0019] (3) In this invention, the overflow component can promptly overflow excess water when the rain is too heavy, and due to its structural design, dirt is not easily blocked from the overflow port, ensuring the smoothness of the overflow and further enhancing the drainage capacity of the drainage well cover. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a drainage well cover for accelerating drainage according to the present invention, viewed from the main perspective. Figure 2 This is a schematic diagram of the overall structure of a drainage well cover for accelerating drainage according to the present invention, viewed from an upward angle. Figure 3 This is a top view of a drainage well cover for accelerating drainage according to the present invention; Figure 4 This is a cross-sectional view at point AA of a drainage well cover for accelerating drainage according to the present invention; Figure 5 This is an enlarged view of section B of a drainage well cover for accelerating drainage according to the present invention. Figure 6 This is a front view of a drainage well cover for accelerating drainage according to the present invention; Figure 7 This is a cross-sectional view at the CC section of a drainage well cover for accelerating drainage according to the present invention. Figure 8 This is an enlarged view of the structure at point D of a drainage well cover for accelerating drainage according to the present invention; Figure 9This is a schematic diagram of the rotating assembly of a drainage well cover for accelerating drainage according to the present invention.

[0021] In the diagram: 1. Annular support platform; 2. Support step edge; 3. Inwardly inclined annular surface; 4. Lower well body; 5. Outer interception well; 6. Lower sealing plate; 7. Intermediate layer plate; 8. Fixed column; 9. Inverted conical platform; 10. Water flow cavity; 11. Spiral plate; 12. Spiral acceleration channel; 13. Outlet; 14. Intermediate rotating shaft; 15. Rotating fan; 16. Inclined fan blade; 17. Triangular connector; 18. Intermediate sealing; 19. Upper inclined annular surface; 20. Internal drive. 21. Moving cavity; 22. Central gear; 23. Planetary gear; 24. External gear ring; 25. Lower fixed plate; 26. Rotating assembly; 27. Intermediate shaft; 28. Rotating component; 29. ​​Straight surface; 30. Triangular arc surface; 31. Flow area; 32. Waste collection area; 33. Lower drain hole; 34. External overflow assembly; 35. Overflow pipe; 36. Lower opening; 37. Intermediate float; 38. Pressure spring; 39. Interceptor cover; 40. Upper interceptor groove. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] Please see Figures 1-9 The present invention provides an embodiment of a drainage well cover for accelerating drainage. The supporting body is an annular support platform 1. The upper end of the inner wall of the annular support platform 1 is provided with a supporting step edge 2. An intercepting cover 39 is provided along the upper end of the supporting step edge 2 inside the annular support platform 1. The intercepting cover 39 is provided with a plurality of upper intercepting grooves 40. The upper intercepting grooves 40 can initially intercept the water entering the drainage well cover, filter out larger debris, and prevent it from entering the subsequent drainage channel and causing blockage.

[0024] The inner surface of the annular support platform 1 is designed as an inwardly inclined annular surface 3, which helps guide water flow. A lower well body 4 is fixed below the annular support platform 1. An intermediate layer plate 7 is fixed in the middle of the lower well body 4. A fixed column 8 is fixed in the center of the upper end of the intermediate layer plate 7. An inverted conical platform 9 is fixed at the upper end of the fixed column 8. The inverted conical platform 9 is located in the space inside the inwardly inclined annular surface 3. A water flow cavity 10 is formed between the annular support platform 1 and the inverted conical platform 9.

[0025] Four spiral plates 11 are fixed in a circular array along the upper end of the intermediate layer plate 7 between the lower well body 4 and the fixed column 8. These spiral plates 11, the lower well body 4, and the fixed column 8 form four spiral acceleration channels 12. Compared to straight drainage channels, the spiral acceleration channels 12 design allows the water to generate spiral acceleration during flow. According to fluid mechanics principles, spiral flow increases the kinetic energy of the water, thereby increasing the drainage speed. Four drain outlets 13 are fixed through the end face of the intermediate layer plate 7. The drain outlets 13 are located at the lower end of the spiral acceleration channels 12 and are inclined along the spiral direction of the channels 12. This inclined arrangement better guides the spirally flowing water out.

[0026] A centrally located rotating shaft 14 is centrally connected to the lower end of the intermediate layer 7. A rotating fan 15 is mounted on the upper part of the outer side of the central rotating shaft 14. The rotating fan 15 includes multiple ring-shaped arrays of inclined fan blades 16, which are inclined towards the drain outlet 13. When water flows spirally downward through the spiral acceleration channel 12 and out through the drain outlet 13, the spiral acceleration channel 12 and the drain outlet 13 provide the spiral flow direction for the water. The water then impacts the inclined surfaces of the inclined fan blades 16 on the rotating fan 15, thereby driving the rotating fan 15 to rotate and providing rotational driving force to the central rotating shaft 14. By utilizing the dynamic force of water flow to drive the rotation of the rotating fan 15, no additional energy is required, thus achieving efficient energy utilization.

[0027] The lower end of the intermediate shaft 14 extends into the inner drive cavity 20 and is fixed with a central gear 21. The inner drive cavity 20 is located inside the intermediate sealing barrier 18, and the intermediate sealing barrier 18 is fixed to the lower well body 4 by a series of triangular connectors 17 arranged in a ring array. The outer periphery of the upper end face of the intermediate sealing barrier 18 is set as an upwardly inclined annular surface 19. The interior of the lower well body 4 is set as a flow zone 30 along the outer periphery of the intermediate sealing barrier 18. The upwardly inclined annular surface 19 helps to guide water smoothly into the flow zone 30 and reduce dead zones in water flow. The lower end of the inner drive cavity 20 is rotatably connected to a lower fixed plate 24. Multiple planetary gears 22 are installed inside the inner drive cavity 20 along the cross direction outside the central gear 21. The planetary gears 22 are meshed with the central gear 21. An external gear ring 23 is installed inside the inner drive cavity 20 along the outer periphery of the multiple planetary gears 22. The external gear ring 23 is meshed with all the multiple planetary gears 22. The external gear ring 23 is located on the upper periphery of the lower fixed plate 24 and is fixed to the lower fixed plate 24. When the intermediate shaft 14 drives the central gear 21 to rotate clockwise, the planetary gear 22, which meshes with the central gear 21, rotates synchronously in the opposite direction, and the external gear ring 23, which meshes with the planetary gear 22, is driven to rotate counterclockwise.

[0028] An outer interception well 5 is located at the lower end of the lower well body 4. The inner diameter of the outer interception well 5 is larger than the inner diameter of the lower well body 4. A lower sealing plate 6 is provided on the lower end face of the outer interception well 5. A waste collection area 31 is provided inside the outer interception well 5 along the outer perimeter of the area where the rotating component 25 is located. Several lower drainage holes 32 are provided through the lower end face of the lower sealing plate 6 along the lower perimeter of the area where the rotating component 25 is located. After the rotating fan 15 is driven to rotate, the water enters the inner area of ​​the outer interception well 5 through the flow area 30. Due to the presence of the upper and lower drainage holes 32 on the lower sealing plate 6, the water flows out through the lower drainage holes 32.

[0029] A rotating assembly 25 is provided at the lower end of the intermediate sealing plate 18. The rotating assembly 25 includes an intermediate shaft 26 and rotating parts 27. Multiple rotating parts 27 are arranged in a circular array outside the intermediate shaft 26. The upper end of the intermediate shaft 26 extends upward into the inner drive cavity 20 and is connected to the lower fixing plate 24. The rotating part 27 has a triangular arc surface 29 on the side facing the rotation direction, and a straight surface 28 on the other side. Since the lower end surface of the rotating part 27 is in contact with the upper end surface of the lower sealing plate 6, and the counterclockwise rotating surface of the rotating part 27 is a triangular arc surface 29, when the rotating part 27 rotates counterclockwise, it pushes the dirt along the triangular arc surface 29, pushing the dirt into the dirt collection area 31, and the lower drain hole 32 is exposed again, ensuring the outflow of water. Compared with the flat design, the triangular arc surface 29 design can push the dirt more smoothly and reduce dirt accumulation.

[0030] Multiple overflow components 33 are installed in a ring array on the upper part of the outer interception well 5. Each overflow component 33 includes an overflow pipe 34, which has an "L"-shaped structure. The outer end of the overflow pipe 34 extends to the outside of the outer interception well 5 and is integrally connected to an overflow pipe 35. A lower opening 36 is centrally located on the lower end face of the overflow pipe 34. The diameter of the lower opening 36 is larger than the diameter of the lower drain hole 32. This larger opening design allows for rapid drainage of excess water during heavy rainfall, resulting in faster drainage compared to a smaller opening design. A central float 37 is installed at the lower end of the overflow pipe 34. The diameter of the central float 37 is larger than the diameter of the lower opening 36. The upper end of the central float 37 is connected to the inflection point inside the overflow pipe 34 via a pressure spring 38. The pressure spring 38 serves as a connection, but its elasticity cannot counteract the buoyancy of the water. When rainfall is heavy, even if the lower drain hole 32 is kept clear, the outflow of water is less than the inflow, causing the water level in the outer interception well 5 to gradually rise. As the water rises, the water level exceeds the position of the intermediate float 37 inside the overflow pipe 34. The buoyancy of the water exceeds the elastic force of the pressure spring 38, causing the intermediate float 37 to rise. The water then overflows through the overflow pipe 34 and the overflow pipe 35. Because the water does not flow downwards due to gravity but rather rises and overflows, debris will not clog the lower opening 36 as it would clog the lower drain hole 32. Furthermore, the lower opening 36 is relatively large, and its primary purpose during heavy rainfall is rapid drainage. Some small debris overflows along the overflow pipe 34 and the overflow pipe 35, thus placing little pressure on the entire underground pipe network system.

[0031] The working method of this drainage manhole cover that accelerates drainage is as follows: Step 1: After initial interception by the upper interception groove 40 on the interception cover 39, the water enters the water flow chamber 10, then flows downwards spirally through the spiral acceleration channel 12, and flows out through the drain outlet 13. During this process, the upper interception groove 40 filters out larger debris, and the spiral acceleration channel 12 gives the water a spiral acceleration, increasing the initial drainage speed.

[0032] Step Two: Water enters the inner area of ​​the outer interception well 5 through the area where the drive fan 15 is located and the flow area 30, and flows out through the lower drain hole 32. The dirt carried by the water will adhere tightly to the upper area of ​​the lower sealing plate 6 due to the downward force of the water flow. While the water is being discharged smoothly, the dirt is concentrated at the upper end of the lower sealing plate 6, preparing for subsequent dirt cleaning.

[0033] Step 3: When water flows through the area where the rotating fan 15 is located, the spiral flow direction provided by the spiral acceleration channel 12 and the drain outlet 13 impacts the inclined surface of the inclined fan blades 16 on the rotating fan 15, causing the rotating fan 15 to rotate and providing rotational driving force to the intermediate shaft 14. The rotating fan 15 is driven by the dynamic force of water flow, requiring no additional energy.

[0034] Step 4: The intermediate rotating shaft 14 drives the central gear 21 to rotate clockwise, the planetary gear 22 meshing with the central gear 21 rotates synchronously in the opposite direction, and the external gear ring 23 meshing with the planetary gear 22 rotates counterclockwise, driving the intermediate shaft 26 on the rotating assembly 25 to rotate.

[0035] Step 5: The counterclockwise rotation of the rotating component 27 pushes the dirt along the triangular arc surface 29, pushing it into the dirt collection area 31. The lower drain hole 32 is then exposed again, ensuring water flow. The design of the triangular arc surface 29 makes dirt removal smoother and prevents dirt from clogging the lower drain hole 32.

[0036] Step Six: When the rainfall is too heavy, the water level in the outer interception well 5 will rise. When the water level exceeds the position of the middle float 37 inside the overflow pipe 34, it will cause the middle float 37 to float up, and the water will overflow through the overflow pipe 34 and the overflow pipe 35.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A drainage well cover for accelerating drainage, comprising an annular support platform (1), characterized in that: The lower end of the annular support platform (1) is fixed with a lower well body (4), and the lower end of the lower well body (4) is fixed with an outer intercepting well (5). The inner diameter of the outer intercepting well (5) is larger than the inner diameter of the lower well body (4). The lower end face of the outer intercepting well (5) is provided with a lower sealing plate (6). The lower end of the lower well body (4) is provided with an intermediate sealing block (18). The intermediate sealing block (18) and the lower well body (4) are fixed by a triangular connector (17) in a multiple annular array. The interior of the intermediate sealing block (18) is provided with an inner driving cavity (20). The lower end of the inner driving cavity (20) is rotatably connected with a lower fixing plate (24). The lower end of the intermediate sealing block (18) is provided with a rotating assembly (25). The device includes an intermediate shaft (26) and a rotating component (27). Multiple rotating components (27) are arranged in a circular array outside the intermediate shaft (26). The upper end of the intermediate shaft (26) extends upward into the inner drive cavity (20) and is connected to a lower fixing plate (24). The rotating component (27) is configured with a triangular arc surface (29) on the rotation direction side and a straight surface (28) on the other side. A dirt collection area (31) is provided inside the outer interception well (5) along the outer area of ​​the rotating component (25). Several lower drainage holes (32) are opened through the end face of the lower sealing plate (6) along the lower end of the rotating component (25). The lower end face of the rotating component (27) is attached to the upper end face of the lower sealing plate (6).

2. A drainage well cover for accelerating drainage according to claim 1, characterized in that: The lower well body (4) has an intermediate layer plate (7) fixed in the middle. The lower end of the intermediate layer plate (7) is rotatably connected to an intermediate rotating shaft (14). A rotating fan (15) is installed on the upper end of the outside of the intermediate rotating shaft (14).

3. A drainage well cover for accelerating drainage according to claim 2, characterized in that: The lower end of the intermediate shaft (14) extends into the inner drive cavity (20) and is fixed with a central gear (21). Multiple planetary gears (22) are installed inside the inner drive cavity (20) along the cross direction outside the central gear (21). The planetary gears (22) mesh with the central gear (21). An external gear ring (23) is installed inside the inner drive cavity (20) along the outside of the multiple planetary gears (22). The external gear ring (23) meshes with the multiple planetary gears (22). The external gear ring (23) is located on the upper periphery of the lower fixed plate (24) and is fixed to the lower fixed plate (24).

4. A drainage well cover for accelerating drainage according to claim 3, characterized in that: Multiple overflow components (33) are installed in a ring array on the upper part of the outer interception well (5). The overflow components (33) include an overflow pipe (34), which is an "L" shaped structure. The outer end of the overflow pipe (34) extends to the outside of the outer interception well (5) and is integrally connected to an overflow pipe (35).

5. A drainage well cover for accelerating drainage according to claim 4, characterized in that: The overflow pipe (34) has a lower opening (36) in the center of its lower end face. The diameter of the lower opening (36) is larger than the diameter of the lower drain hole (32). The lower end of the overflow pipe (34) is provided with a middle float (37). The diameter of the middle float (37) is larger than the diameter of the lower opening (36). The upper end of the middle float (37) is connected to the inflection point inside the overflow pipe (34) by a pressure spring (38).

6. A drainage well cover for accelerating drainage according to claim 5, characterized in that: The inner surface of the annular support platform (1) is set as an inwardly inclined annular surface (3). A fixed column (8) is fixed at the center of the upper end of the intermediate layer plate (7). An inverted conical platform (9) is fixed at the upper end of the fixed column (8). The inverted conical platform (9) is located in the space inside the inwardly inclined annular surface (3). A water flow cavity (10) is formed between the annular support platform (1) and the inverted conical platform (9).

7. A drainage well cover for accelerating drainage according to claim 6, characterized in that: Four spiral plates (11) are fixed in a ring array along the upper end of the intermediate layer plate (7) between the lower well body (4) and the fixed column (8). Four spiral acceleration channels (12) are formed between the spiral plates (11), the lower well body (4) and the fixed column (8). Four drain outlets (13) are fixed through the end face of the intermediate layer plate (7). The drain outlets (13) are located at the lower end of the spiral acceleration channels (12) and are inclined along the spiral direction of the spiral acceleration channels (12). The rotating fan (15) includes multiple inclined fan blades (16) in a ring array. The inclined fan blades (16) are inclined toward the drain outlets (13).

8. A drainage well cover for accelerating drainage according to claim 7, characterized in that: The outer perimeter of the upper end face of the intermediate sealing (18) is set as an upwardly inclined annular surface (19), and the interior of the lower well body (4) along the outside of the intermediate sealing (18) is set as a flow zone (30).

9. A drainage well cover for accelerating drainage according to claim 8, characterized in that: The upper end of the inner wall of the annular support platform (1) is provided with a support step edge (2), and the upper end of the support step edge (2) of the inner wall of the annular support platform (1) is provided with an interception cover (39), and the interception cover (39) is provided with a plurality of upper interception grooves (40).

10. A working method, based on the drainage well cover for accelerating drainage as described in claim 9, characterized in that, Includes the following steps: Step 1: After the water is initially intercepted by the upper interception groove (40) on the interception cover (39), it enters the water flow chamber (10), then flows downward through the spiral acceleration channel (12), and flows out through the drain (13); Step 2: Water enters the inner area of ​​the outer interceptor well (5) through the area where the drive rotating fan (15) is located and the flow area (30), and flows out through the lower drain hole (32). The dirt carried by the water will adhere tightly to the upper area of ​​the lower sealing plate (6) due to the downward force of the water flow. Step 3: When the water passes through the area where the rotating fan (15) is located, due to the spiral flow direction given by the spiral acceleration channel (12) and the drain (13), it hits the inclined surface of the inclined fan blade (16) on the rotating fan (15), causing the rotating fan (15) to rotate and giving the intermediate shaft (14) a rotation driving force. Step 4: The intermediate shaft (14) drives the central gear (21) to rotate clockwise, the planetary gear (22) meshing with the central gear (21) rotates synchronously in the opposite direction, and the external gear ring (23) meshing with the planetary gear (22) rotates counterclockwise, driving the intermediate shaft (26) on the rotating assembly (25) to rotate. Step 5: The counterclockwise rotation of the rotating part (27) pushes the dirt along the triangular arc surface (29), and the dirt is pushed into the dirt collection area (31). The lower drain hole (32) is exposed again to ensure the outflow of water. Step 6: When the rain is too heavy, the water level in the outer interception well (5) will rise. When the middle float (37) is located inside the overflow pipe (34), it will cause the middle float (37) to float up, and the water will overflow through the overflow pipe (34) and the overflow pipe (35).

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