Rotary anti-blocking nodular cast iron well lid and machining method
By designing a rotating anti-clogging ductile iron manhole cover and using a pulling and perforating mechanism to clear blockages, the problem of blockage in the manhole cover's water inlet pipe is solved, achieving efficient drainage from the manhole cover.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-07
- Publication Date
- 2026-05-19
AI Technical Summary
The water inlet pipes of existing manhole covers are prone to clogging, leading to poor drainage and affecting normal use.
A rotating anti-clogging ductile iron manhole cover was designed, equipped with a pulling mechanism and a perforation mechanism. Through the coordinated work of components such as clamping plates, electric push rods, and barbed blocks, it can clear blockages.
Effectively clearing blockages ensures smooth drainage of the manhole cover, thus improving its efficiency.
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Abstract
Description
Technical Field
[0001] This invention relates to the field of manhole cover technology, and in particular to a rotary anti-clogging ductile iron manhole cover and its processing method. Background Technology
[0002] Manhole covers are facilities that cover the entrances to inspection wells for underground pipelines, cables, etc. in cities. Their main functions are to prevent falls and facilitate pipeline maintenance. They can be classified by material, such as metal and resin, and are widely used in driveways, sidewalks, and other similar applications. Technical parameters include different load ratings, with test loads of 400KN for heavy-duty models, 250KN for standard models, and 125KN for light-duty models. In March 2019, the 203rd Research Institute of China Aerospace Science and Industry Corporation (CASIC) independently developed a manhole cover monitoring system.
[0003] For example, patent application number CN202410901086.9 discloses "a rotating anti-clogging ductile iron manhole cover", which includes a bottom ring, a middle ring fixedly connected to the top of the bottom ring, a top ring fixedly connected to the outer edge of the top of the middle ring, a washer threadedly connected to the inner wall of the middle ring, a rotating ring fixedly connected to the inner wall of the washer, a shaft collar rotatably connected to the inner wall of the rotating ring, a cover plate fixedly connected to the inner wall of the shaft collar, a first gear ring fixedly connected to the bottom end of the outer wall of the cover plate, water inlet pipes perpendicularly penetrating both ends of the cover plate, and a cleaning brush rotatably connected to the top surface of the cover plate.
[0004] However, the blockages that enter the water inlet pipe from the aforementioned manhole covers cannot be effectively prevented and cleared, which can easily cause poor drainage and affect normal use. Summary of the Invention
[0005] The purpose of this invention is to solve the problem in the prior art that blockages entering the water inlet pipe cannot be effectively prevented and cleared, which easily causes poor drainage of the manhole cover and affects normal use. Therefore, this invention proposes a rotary anti-clogging ductile iron manhole cover and its processing method.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a rotary anti-clogging ductile iron manhole cover, comprising a manhole cover, wherein a drainage hole is provided in the middle of the manhole cover.
[0007] It is also equipped with a pulling mechanism for pulling and clearing blockages on the lower side of the drain hole. The pulling mechanism includes clamps symmetrically arranged at the front and rear of the drain hole. A movable plate is slidably installed on the right end of the clamps. An electric push rod is fixedly installed on the right end of the movable plate. The electric push rod is fixedly installed on the lower end of the manhole cover. A spring is fixedly installed on the opposite ends of the clamps. The other end of the spring is fixedly installed on the movable plate.
[0008] It is also provided with a perforation mechanism for perforating and cleaning blockages in the drain hole. The perforation mechanism includes an electric push rod two fixedly installed on the upper end of the movable plate. A top block is fixedly installed on the upper end of the electric push rod two. The top block is symmetrically provided with barbs in all directions. An inclined block is fixedly installed on the end of the barb block near the center of the top block. The lower end of the inclined block is slidably installed on the top block.
[0009] Preferably, each of the clamping plates has a crossbar fixedly installed at its lower end, and a movable rod is rotatably installed through each of the crossbars at opposite ends. Furthermore, inclined plates are fixedly installed on the movable rods symmetrically at the front and rear of the lower end of the manhole cover.
[0010] Preferably, a convex roller is rotatably mounted through the middle of the front clamping plate, a square telescopic rod is fixedly mounted at the front end of the convex roller, and a movable strip is rotatably mounted through the front of the square telescopic rod, with the upper end of the movable strip slidably mounted on the manhole cover.
[0011] Preferably, a gear is fixedly installed on the middle part of the square telescopic rod, and a rack is meshed on the upper end of the gear, with the rack fixedly installed on the lower end of the manhole cover.
[0012] Preferably, a cutting ring is abutted and fitted on the rear side of the convex roller, a magnetic connecting frame is fixedly installed on the lower rear side of the cutting ring, and a magnetic block plate is fixedly installed on the lower end of the manhole cover corresponding to the magnetic connecting frame.
[0013] Preferably, a guide rod is slidably mounted through the magnetic connecting frame. The guide rod is fixedly mounted on the rear end of the convex roller. A second spring is sleeved on the outer side of the guide rod. The front and rear ends of the second spring are fixedly connected to the convex roller and the magnetic connecting frame, respectively.
[0014] Preferably, each of the inclined blocks has a spring three fixedly installed at one end that is far apart from each other, and a vertical plate is fixedly installed at the other end of each spring three. The lower end of the vertical plate is fixedly installed inside the top block.
[0015] Preferably, a disc is abutting and fitting between the inclined blocks, and an electric push rod three is fixedly installed on the upper end of the disc. The upper end of the electric push rod three is fixedly installed inside the top block, and a battery box is fixedly installed on the lower end of the movable plate. Electric push rod one, electric push rod two, and electric push rod three are all electrically connected to the battery inside the battery box.
[0016] Preferably, an aggregating block is slidably installed on the outer side of the top block between the barbs, and a spring four is fixedly installed on the lower end of the top block corresponding to the aggregating block. The lower end of the spring four is fixedly installed on the aggregating block, and a steel wire rope is fixedly installed on the upper end of the aggregating block. The other end of the steel wire rope is fixedly installed on the disc, and a pulley is provided inside the top block corresponding to the steel wire rope.
[0017] A method for processing a rotary anti-clogging ductile iron manhole cover, the specific steps are as follows: Step 1: Start the electric actuator to push the movable plate, clamping plate, cross frame and movable rod to move to the left in sync. The clamping plates on both sides gradually move closer to each other, clamping and pulling the blockage hanging down to the lower side of the drain hole.
[0018] Step 2: The clamping plate drives the convex roller to the lower side of the drain hole. The convex roller rotates to roll up the blockage hanging down to the lower side of the drain hole and fix it on the convex roller for pulling.
[0019] Step 3: The electric push rod 2 drives the top block to rise into the drain hole, pulling out the residue after cleaning from the drain hole, ensuring that the drain hole is unobstructed.
[0020] Step 4: Electric push rod 3 pushes the disc down, the disc squeezes the inclined block and causes four barbed blocks to extend from the top block. The extended barbed blocks help to hook the remaining blockage on the inner wall of the drain hole. When electric push rod 2 drives the top block down, the four barbed blocks hook off the blockage on the inner wall.
[0021] Step 5: As the disc descends, the four gathering blocks are pulled up by steel wire ropes and pulleys. The four gathering blocks form a triangle and gather the remaining blockages on the inner wall of the drain hole to the area where the barbs protrude, which helps the barbs hook the blockages later.
[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, when the electric actuator is activated, it pushes the movable plate, clamping plate, cross frame and movable rod to move to the left synchronously. Under the storage and release of the spring, the movable rod rolls continuously on the inclined surface of the inclined plate, thereby causing the clamping plates on both sides to gradually move closer to each other, which makes it easier to clamp the blockage hanging down to the lower side of the drainage hole. As the movable plate and clamping plate continue to move to the left, it is beneficial to pull and clear the blockage hanging down to the lower side of the drainage hole, reduce the blockage of the drainage hole and ensure smooth drainage of the manhole cover.
[0023] 2. In this invention, when the clamping plates approach each other, they also drive the convex roller to move to the lower side of the drain hole. The convex roller also drives the square telescopic rod, gear, and movable bar to move to the left synchronously. The square telescopic rod extends adaptively, and the gear rotates under the action of the rack, driving the square telescopic rod and the convex roller to rotate. The rotation of the convex roller is conducive to rolling up and fixing the blockage hanging down to the lower side of the drain hole onto the convex roller, avoiding the situation where the clamping plates on both sides are not firmly clamped, which would prevent the blockage from being pulled out normally. This improves the cleaning effect of the blockage and is conducive to rolling up longer blockages, avoiding the situation where the blockage is not pulled out completely, thus ensuring the cleaning quality of the drain hole.
[0024] 3. In this invention, when the convex roller is reset, the magnetic connecting frame will intermittently pass the front side of the magnetic block plate. Under the action of magnetic thrust, the magnetic connecting frame and the cutter ring will cut the blockage wrapped on the convex roller on the guide rod. The cut blockage will fall off the convex roller, avoiding the situation where too much blockage is wrapped on the convex roller, which would reduce the winding effect of the convex roller.
[0025] 4. In this invention, when the movable plate moves to the left, it will also drive the electric push rod two and the top block to move synchronously. When the top block moves to the lower side of the drain hole, the electric push rod two drives the top block to rise into the drain hole, which helps to push out the residue after the drain hole is cleaned and ensures that the drain hole is unobstructed.
[0026] 5. In this invention, the electric actuator three pushes the disc to descend, and the disc squeezes the inclined block, causing four barbed blocks to extend from the top block. The spring three is adaptively compressed and stores force. The extended barbed blocks are beneficial for hooking the blockages remaining on the inner wall of the drain hole. When the electric actuator two drives the top block to descend, the four barbed blocks can easily hook off the blockages on the inner wall, ensuring the smooth flow of the drain hole and reducing the blockage of the drain hole.
[0027] 6. In this invention, when the disc descends, it also pulls the four gathering blocks upward through the steel wire rope and pulley. The four springs are compressed and stored. The four gathering blocks are arranged in a triangle to facilitate the gathering of the remaining blockage on the inner wall of the drain hole to the area where the barb blocks protrude. This helps the barb blocks to hook the blockage in the future, ensuring the quality of cleaning the blockage in the drain hole. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention.
[0029] Figure 2 This is a bottom-view three-dimensional structural diagram of the present invention.
[0030] Figure 3 This is another bottom-view perspective view of the three-dimensional structure of the present invention.
[0031] Figure 4 This is a cross-sectional perspective view of the front part of the present invention.
[0032] Figure 5 This is a cross-sectional perspective view of another front portion of the present invention.
[0033] Figure 6 For the present invention Figure 2 Enlarged structural diagram of the connection between the middle plate, the movable plate, and the inclined plate.
[0034] Figure 7 For the present invention Figure 6 A schematic diagram of the structure at point A in the middle.
[0035] Figure 8 For the present invention Figure 6 A schematic diagram of the structure at point B.
[0036] Figure 9 For the present invention Figure 3 A schematic diagram of the structure at point C.
[0037] Figure 10 For the present invention Figure 5 A schematic diagram of the structure at point D.
[0038] Figure 11 For the present invention Figure 4 A schematic diagram of the structure at point E in the middle.
[0039] In the diagram: 1. Manhole cover; Pulling mechanism: 2. Clamping plate; 3. Movable plate; 4. Electric actuator one; 6. Spring one; 7. Horizontal frame; 8. Movable rod; 9. Inclined plate; 10. Convex point roller; 11. Square telescopic rod; 12. Gear; 13. Movable bar; 14. Rack; 15. Cutting ring; 16. Magnetic connecting frame; 17. Guide rod; 18. Spring two; 19. Magnetic block plate; Perforation mechanism: 20. Electric actuator two; 21. Top block; 22. Battery box; 23. Barbed block; 24. Inclined block; 25. Spring three; 26. Vertical plate; 27. Disc; 28. Electric actuator three; 29. Gathering block; 30. Spring four; 31. Steel wire rope; 32. Pulley. Detailed Implementation
[0040] 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.
[0041] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0042] Reference Figures 1-11A rotating anti-clogging ductile iron manhole cover includes a manhole cover 1 with a drainage hole in the middle. It also includes a pulling mechanism for clearing blockages below the drainage hole. The pulling mechanism includes clamping plates 2 symmetrically arranged at the bottom of the drainage hole. A movable plate 3 is slidably mounted on the right end of the clamping plate 2, and an electric push rod 4 is fixedly mounted on the right end of the movable plate 3. The electric push rod 4 is fixedly mounted on the lower end of the manhole cover 1. Springs 6 are fixedly mounted on opposite ends of the clamping plates 2, and the other ends of the springs 6 are fixedly mounted on the movable plate 3. A crossbeam 7 is fixedly mounted on the lower end of each clamping plate 2, and a movable rod 8 is rotatably mounted through opposite ends of each crossbeam 7. Inclined plates 9 are fixedly mounted symmetrically on opposite ends of the movable rods 8 at the lower end of the manhole cover 1. A convex roller 10 is rotatably mounted through the middle of the front clamping plate 2. A square telescopic rod 11 is fixedly installed at the front end of the reel 10. A movable strip 13 is rotatably installed through the front side of the square telescopic rod 11. The upper end of the movable strip 13 is slidably installed on the manhole cover 1. A gear 12 is fixedly installed in the middle of the square telescopic rod 11. A rack 14 is meshed at the upper end of the gear 12. The rack 14 is fixedly installed on the lower end of the manhole cover 1. A cutter ring 15 is abutted and fitted on the rear side of the convex reel 10. A magnetic connecting frame 16 is fixedly installed on the lower rear end of the cutter ring 15. A magnetic block plate 19 is fixedly installed on the lower end of the manhole cover 1 corresponding to the magnetic connecting frame 16. A guide rod 17 is slidably installed through the magnetic connecting frame 16. The guide rod 17 is fixedly installed on the rear end of the convex reel 10. A second spring 18 is sleeved on the outer side of the guide rod 17. The front and rear ends of the second spring 18 are fixedly connected to the convex reel 10 and the magnetic connecting frame 16, respectively.
[0043] During operation, the electric actuator 4 pushes the movable plate 3, clamping plate 2, crossbeam 7, and movable rod 8 to move synchronously to the left. Under the stored force release of spring 6, the movable rod 8 continuously rolls on the inclined surface of the inclined plate 9, causing the clamping plates 2 on both sides to gradually move closer together, making it easier to clamp the blockage hanging down below the drain hole. As the movable plate 3 and clamping plate 2 continue to move to the left, it helps to pull and clear the blockage hanging down below the drain hole, reducing the blockage of the drain hole and ensuring smooth drainage of the manhole cover 1. At the same time, when the clamping plates 2 move closer together, they also drive the convex roller 10 to move to the lower side of the drain hole, and the convex roller 10 also drives the square telescopic rod 11, gear 12, and movable bar 13 to move synchronously to the left. The square telescopic rod 11 extends adaptively, and the gear 12 rotates under the action of the rack 14, driving the square telescopic rod 11 and... The rotating convex roller 10 helps to roll up and fix the blockage hanging below the drain hole onto the convex roller 10, avoiding the situation where the two side clamps 2 are not firmly clamped and the blockage cannot be pulled out properly, thus improving the cleaning effect of the blockage. It also helps to roll up longer blockages, avoiding the situation where the blockage is not pulled out completely, thus ensuring the cleaning quality of the drain hole. When the convex roller 10 is reset, the magnetic connecting frame 16 will intermittently pass the front side of the magnetic block plate 19. Under the action of magnetic thrust, the magnetic connecting frame 16 and the cutter ring 15 will cut the blockage wrapped on the convex roller 10 on the guide rod 17. The cut blockage falls off the convex roller 10, avoiding the situation where too much blockage is wrapped around the convex roller 10, which would reduce the winding effect of the convex roller 10.
[0044] As an embodiment of the present invention, a perforation mechanism for perforating and cleaning blockages in drainage holes is also provided. The perforation mechanism includes an electric push rod 20 fixedly installed on the upper end of the movable plate 3. A top block 21 is fixedly installed on the upper end of the electric push rod 20. Barbs 23 are symmetrically arranged in all directions inside the top block 21. An inclined block 24 is fixedly installed on one end of each barb 23 near the center of the top block 21. The lower end of the inclined block 24 is slidably installed on the top block 21. A spring 25 is fixedly installed on one end of each inclined block 24 away from each other. A vertical plate 26 is fixedly installed on the other end of each spring 25. The lower end of the vertical plate 26 is fixedly installed inside the top block 21. A circular groove is formed between the inclined blocks 24. The disc 27 has an electric actuator 28 fixedly installed on its upper end. The upper end of the electric actuator 28 is fixedly installed inside the top block 21. The lower end of the movable plate 3 has a battery box 22 fixedly installed. The electric actuators 4, 20, and 28 are all electrically connected to the battery inside the battery box 22. The top block 21 has a gathering block 29 slidably installed on its outer side between the barbed blocks 23. The lower end of the top block 21 is fixedly installed with a spring 30 corresponding to the gathering block 29. The lower end of the spring 30 is fixedly installed on the gathering block 29. The upper end of the gathering block 29 is fixedly installed with a steel wire rope 31. The other end of the steel wire rope 31 is fixedly installed on the disc 27. The top block 21 is equipped with a pulley 32 corresponding to the steel wire rope 31.
[0045] During operation, when the movable plate 3 moves to the left, it also drives the electric actuator 20 and the top block 21 to move synchronously. When the top block 21 moves to the lower side of the drain hole, the electric actuator 20 drives the top block 21 to rise into the drain hole, which helps to push out the residue after the drain hole is cleaned, ensuring the unobstructed flow of the drain hole. The electric actuator 3 28 is activated to push the disc 27 down. The disc 27 squeezes the inclined block 24, causing the four barbed blocks 23 to extend from the top block 21. The spring 3 25 is adaptively compressed and stores force. The extended barbed blocks 23 help to clean the residue on the inner wall of the drain hole. When the electric push rod 20 drives the top block 21 to descend, the four barbed blocks 23 can easily hook off the blockage on the inner wall, ensuring the unobstructed flow of the drain hole and reducing blockage. When the disc 27 descends, it will also pull the four gathering blocks 29 upward through the wire rope 31 and pulley 32. The spring 4 30 is compressed and stored. The four gathering blocks 29 are triangular in shape, which can facilitate the gathering of the remaining blockage on the inner wall of the drain hole to the area where the barbed blocks 23 protrude. This is beneficial for the barbed blocks 23 to hook the blockage in the future, ensuring the quality of cleaning the blockage in the drain hole.
[0046] A method for processing a rotary anti-clogging ductile iron manhole cover, the specific steps are as follows: Step 1: Start the electric push rod 4 to push the movable plate 3, clamping plate 2, cross frame 7 and movable rod 8 to move to the left in sync. The clamping plates 2 on both sides gradually move closer to each other, clamping and pulling the blockage hanging down to the lower side of the drain hole.
[0047] Step 2: The clamp 2 drives the convex roller 10 to move to the lower side of the drain hole. The convex roller 10 rotates to roll up the blockage hanging down to the lower side of the drain hole and fix it on the convex roller 10 for pulling.
[0048] Step 3: The electric push rod 20 drives the top block 21 to rise into the drain hole, pulling out the residue after cleaning from the drain hole, thus ensuring the unobstructed flow of the drain hole.
[0049] Step 4: Electric actuator 28 pushes the disc 27 down. The disc 27 squeezes the inclined block 24, causing four barbed blocks 23 to extend from the top block 21. The extended barbed blocks 23 help to hook the remaining blockage on the inner wall of the drain hole. When electric actuator 20 drives the top block 21 down, the four barbed blocks 23 hook off the blockage on the inner wall.
[0050] Step 5: When the disc 27 descends, it pulls the four gathering blocks 29 upward through the steel wire rope 31 and pulley 32. The four gathering blocks 29 form a triangle and gather the remaining blockage on the inner wall of the drain hole to the area where the barb block 23 protrudes, which is conducive to the barb block 23 hooking the blockage in the future.
[0051] Working Principle: When this invention is in use, the electric actuator 4 pushes the movable plate 3, clamping plate 2, crossbeam 7, and movable rod 8 to move synchronously to the left. Under the stored force release of spring 6, the movable rod 8 continuously rolls on the inclined surface of the inclined plate 9, causing the clamping plates 2 on both sides to gradually move closer together, making it easier to clamp the blockage hanging down to the lower side of the drain hole. As the movable plate 3 and clamping plate 2 continue to move to the left, it helps to pull and clear the blockage hanging down to the lower side of the drain hole, reducing the blockage of the drain hole and ensuring smooth drainage of the manhole cover 1. At the same time, when the clamping plates 2 move closer together, they also drive the convex roller 10 to move to the lower side of the drain hole, and the convex roller 10 also drives the square telescopic rod 11 and gear. 12 and movable bar 13 move synchronously to the left, square telescopic rod 11 extends adaptively, gear 12 rotates under the action of rack 14, driving square telescopic rod 11 and convex roller 10 to rotate. The rotation of the convex roller 10 helps to roll up and fix the blockage hanging below the drain hole onto the convex roller 10, avoiding the situation where the clamping plates 2 on both sides are not firm enough, which would prevent the blockage from being pulled out properly. This improves the cleaning effect of the blockage and is also conducive to rolling up longer blockages, avoiding the situation where the blockage is not pulled out completely, thus ensuring the cleaning quality of the drain hole. When the convex roller 10 returns to its original position, the magnetic connecting bracket 16 will intermittently pass the front side of the magnetic block plate 19, under the magnetic push Under the action of force, the magnetic connecting frame 16 and the cutter ring 15 will cut the blockage wrapped around the convex roller 10 on the guide rod 17. The cut blockage will fall off the convex roller 10, avoiding the blockage from being wrapped around the convex roller 10 too much, which would reduce the winding effect of the convex roller 10. When the movable plate 3 moves to the left, it will also drive the electric push rod 20 and the top block 21 to move synchronously. When the top block 21 moves to the lower side of the drain hole, the electric push rod 20 will drive the top block 21 to rise into the drain hole, which will help to push out the residue after the drain hole is pulled and cleaned, ensuring the unobstructed flow of the drain hole. The electric push rod 28 will be activated to push the disc 27 down. The disc 27 will squeeze the inclined block 24 and drive the four inverted The barbs 23 extend from the top block 21, and the spring 3 25 is adaptively compressed and stored. The extended barbs 23 are conducive to hooking the blockages remaining on the inner wall of the drain hole. When the electric push rod 20 drives the top block 21 to descend, the four barbs 23 can easily hook off the blockages on the inner wall, ensuring the unobstructed flow of the drain hole and reducing blockages. When the disc 27 descends, it will also pull the four gathering blocks 29 upward through the wire rope 31 and pulley 32. The spring 4 30 is compressed and stored. The four gathering blocks 29 are arranged in a triangle to facilitate the gathering of the blockages remaining on the inner wall of the drain hole to the area where the barbs 23 extend. This is conducive to the barbs 23 hooking the blockages in the future, ensuring the quality of cleaning the blockages in the drain hole.
[0052] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A rotary anti-clogging ductile iron manhole cover, comprising a manhole cover (1), characterized in that, The manhole cover (1) has a drainage hole in the middle. It is also provided with a pulling mechanism for pulling and cleaning the blockage on the lower side of the drainage hole. The pulling mechanism includes a clamping plate (2) symmetrically arranged at the lower side of the drainage hole. A movable plate (3) is slidably installed on the right end of the clamping plate (2). An electric push rod (4) is fixedly installed on the right end of the movable plate (3). The electric push rod (4) is fixedly installed on the lower end of the manhole cover (1). A spring (6) is fixedly installed on the opposite ends of the clamping plates (2). The other end of the spring (6) is fixedly installed on the movable plate (3). It is also provided with a perforation mechanism for perforating and cleaning blockages in the drain hole. The perforation mechanism includes an electric push rod two (20) fixedly installed on the upper end of the movable plate (3). A top block (21) is fixedly installed on the upper end of the electric push rod two (20). The top block (21) is symmetrically provided with barbs (23) in the front, back, left and right sides. An inclined block (24) is fixedly installed on one end of the barb block (23) near the center of the top block (21). The lower end of the inclined block (24) is slidably installed on the top block (21).
2. A rotary anti-clogging ductile iron manhole cover according to claim 1, characterized in that, The lower end of each clamp (2) is fixedly installed with a crossbar (7), and the ends of the crossbars (7) that are far apart from each other are rotatably installed with movable rods (8). The lower end of the manhole cover (1) is symmetrically equipped with inclined plates (9) corresponding to the movable rods (8).
3. A rotary anti-clogging ductile iron manhole cover according to claim 1, characterized in that, A convex roller (10) is rotatably mounted through the middle of the clamp (2) on the front side. A square telescopic rod (11) is fixedly mounted at the front end of the convex roller (10). A movable strip (13) is rotatably mounted through the front side of the square telescopic rod (11). The upper end of the movable strip (13) is slidably mounted on the manhole cover (1).
4. A rotary anti-clogging ductile iron manhole cover according to claim 3, characterized in that, A gear (12) is fixedly installed in the middle of the square telescopic rod (11), and a rack (14) meshes with the upper end of the gear (12). The rack (14) is fixedly installed on the lower end of the manhole cover (1).
5. A rotary anti-clogging ductile iron manhole cover according to claim 3, characterized in that, The convex roller (10) is fitted with a cutting ring (15) on the upper rear side. A magnetic connecting frame (16) is fixedly installed on the lower rear side of the cutting ring (15), and a magnetic block plate (19) is fixedly installed on the lower end of the manhole cover (1) corresponding to the magnetic connecting frame (16).
6. A rotary anti-clogging ductile iron manhole cover according to claim 5, characterized in that, A guide rod (17) is slidably mounted through the magnetic connector (16). The guide rod (17) is fixedly mounted on the rear end of the convex roller (10). A second spring (18) is sleeved on the outside of the guide rod (17). The front and rear ends of the second spring (18) are fixedly connected to the convex roller (10) and the magnetic connector (16) respectively.
7. A rotary anti-clogging ductile iron manhole cover according to claim 1, characterized in that, Each of the inclined blocks (24) has a spring three (25) fixedly installed at one end away from each other, and a vertical plate (26) fixedly installed at the other end of each spring three (25). The lower end of the vertical plate (26) is fixedly installed inside the top block (21).
8. A rotary anti-clogging ductile iron manhole cover according to claim 1, characterized in that, A disc (27) is abutting and fitting between the inclined blocks (24). An electric push rod three (28) is fixedly installed on the upper end of the disc (27). The upper end of the electric push rod three (28) is fixedly installed inside the top block (21). A battery box (22) is fixedly installed on the lower end of the movable plate (3). The electric push rod one (4), electric push rod two (20) and electric push rod three (28) are all electrically connected to the battery inside the battery box (22).
9. A rotary anti-clogging ductile iron manhole cover according to claim 1, characterized in that, Aggregating blocks (29) are slidably installed on the outer side of the top block (21) between the barbed blocks (23). A spring four (30) is fixedly installed on the lower end of the top block (21) corresponding to the aggregating block (29). The lower end of the spring four (30) is fixedly installed on the aggregating block (29). A steel wire rope (31) is fixedly installed on the upper end of the aggregating block (29). The other end of the steel wire rope (31) is fixedly installed on the disc (27). A pulley (32) is provided inside the top block (21) corresponding to the steel wire rope (31).
10. A method for processing a rotary anti-clogging ductile iron manhole cover according to any one of claims 1-9, characterized in that, The specific steps are as follows: Step 1: Start the electric push rod (4) to push the movable plate (3), clamp (2), cross frame (7) and movable rod (8) to move to the left in sync. The clamps (2) on both sides gradually move closer to each other, clamping and pulling the blockage hanging down to the lower side of the drain hole. Step 2: The clamp (2) drives the convex roller (10) to move to the lower side of the drain hole. The convex roller (10) rotates to roll up the blockage hanging down to the lower side of the drain hole and fix it on the convex roller (10) for pulling. Step 3: The electric push rod 2 (20) drives the top block (21) to rise into the drain hole, pulling out the residue after cleaning from the drain hole, thus ensuring the unobstructed flow of the drain hole; Step 4: Electric push rod 3 (28) pushes the disc (27) down. The disc (27) squeezes the inclined block (24), causing the four barbed blocks (23) to extend from the top block (21). The extended barbed blocks (23) are helpful to hook the blockage remaining on the inner wall of the drain hole. When electric push rod 2 (20) drives the top block (21) down, the four barbed blocks (23) hook off the blockage on the inner wall. Step 5: When the disc (27) descends, it pulls the four gathering blocks (29) upward through the steel wire rope (31) and pulley (32). The four gathering blocks (29) form a triangle and gather the remaining blockage on the inner wall of the drain hole to the area where the barb block (23) protrudes, which is beneficial for the barb block (23) to hook the blockage in the future.