Municipal well lid

Abstract

The invention belongs to the technical field of well lids, and particularly relates to a municipal well lid which comprises a base, a well lid body is arranged in a cover plate groove of the base, a second mounting groove is formed in the base, a connecting groove communicating with the cover plate groove is formed in the inner top of the second mounting groove, and a motor is arranged on the inner bottom wall of the second mounting groove. A first lead screw is arranged on an output shaft of the motor and penetrates through the interior of the connecting groove, a first moving block is rotationally connected to the outer wall of the first lead screw, a lifting pipe fixed to the first moving block is connected to the outer surface of the first lead screw in a sleeving mode, and a first inserting groove matched with the lifting pipe is formed in the outer wall of the well lid in a penetrating mode; the lifting pipe is detachably connected with the first inserting groove; the manhole cover can be driven to move up and down in the base, so that the smoothness of a road surface is ensured, and normal walking of passersby is not influenced any more; workers can conveniently open and close the well lid, the trouble of manually prying the well lid is omitted, and the labor intensity is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of manhole covers, and in particular relates to a municipal manhole cover. Background Art

[0002] In the process of urbanization, the construction and maintenance of municipal facilities are key links to ensure the normal operation of the city. Among them, manhole covers, as an important part of urban infrastructure, their performance and safety are directly related to the daily travel safety of citizens and the overall image of the city.

[0003] Problems with existing technologies: Firstly, traditional manhole covers are often not level with the surrounding road surface due to factors such as material, installation process and ground subsidence, which not only affects the appearance but may also cause safety hazards such as pedestrians tripping and vehicle bumps. Secondly, when traditional manhole covers need to be opened for maintenance or inspection, they usually need to be pried open manually, which is inconvenient and inefficient. Manhole covers are also often stolen, which not only causes losses to municipal facilities, but more importantly, the open manhole mouth becomes a huge safety hazard, which may cause accidents such as pedestrians falling and vehicle damage. Summary of the invention

[0004] The purpose of the present invention is to provide a municipal manhole cover, which can drive the manhole cover to move up and down in the base, ensure the flatness of the road surface, and no longer affect the normal walking of passers-by; it is convenient for staff to open and close the manhole cover, saves the trouble of prying open the manhole cover by manpower, reduces labor intensity, avoids the gravity of the manhole cover acting entirely on the first screw rod, causing damage to the first screw rod for a long time, and improves the service life of the equipment.

[0005] The technical solution adopted by the present invention is as follows: A municipal manhole cover, comprising a base, a manhole cover is arranged in a cover plate groove of the base, a second installation groove is provided inside the base, a connecting groove connected to the cover plate groove is provided at the inner top of the second installation groove, a motor is provided on the inner bottom wall of the second installation groove, a first screw rod is provided on the output shaft of the motor, and the first screw rod passes through the inside of the connecting groove, a first moving block is screwed to the outer wall of the first screw rod, a lifting tube fixed to the first moving block is sleeved on the outer surface of the first screw rod, a first plug-in groove matching the lifting tube is provided through the outer wall of the manhole cover, the lifting tube is detachably connected to the first plug-in groove, a hexagonal groove is provided on the top of the first screw rod, a first limit assembly is provided on one side of the manhole cover, and a plurality of support assemblies are provided in the cover plate groove of the base; The first limiting assembly includes a mounting block fixed to one side of the manhole cover, a limiting groove matched with the mounting block is provided on the inner side of the base, a first mounting groove is provided at the bottom of the mounting block, a first limiting block is slidably installed inside the first mounting groove, a first guide rod is fixed to the inner top of the first mounting groove, a first guide hole matched with the first guide rod is provided on the top of the first limiting block, a first spring is fixed to the top of the first limiting block, and the top of the first spring is fixed to the inner wall of the first mounting groove, and a first inclined sliding surface is provided on one side of the bottom of the first limiting block.

[0006] The first plug-in slot and the lifting tube are fixed to each other by bolts or buckles, and the bolts or buckles are arranged on the side wall of the manhole cover.

[0007] The outer wall of the first screw rod is located in the second installation groove and fixed with a first gear. The inner side of the second installation groove is provided with a first annular slide groove. The inner part of the first annular slide groove is slidably installed with an inner gear ring meshing with the first gear.

[0008] The support assembly includes a plurality of fixed tubes passing through the inner top of the second mounting groove, a support tube is arranged inside the fixed tube, a plurality of second screw rods are rotatably installed on the inner bottom of the second mounting groove, a second movable block is screwed on the outer wall of the second screw rod and is located in the support tube, and the second movable block is fixed to the inner side of the support tube, and a second gear meshing with the inner gear ring is fixed on the outer wall of the second screw rod.

[0009] Two first sliding blocks are fixed to the outer wall of the support tube, a first sliding groove slidably connected to the first sliding block is provided on the inner side of the fixed tube, a second annular sliding groove connected to the top of the first sliding groove is provided on the inner side of the fixed tube, a second plugging groove is provided at the inner bottom of the second annular sliding groove and close to the first sliding groove, a second limiting block is slidably installed inside the second plugging groove, a second inclined sliding surface is provided on the top side of the second limiting block, and a second spring fixed to the inner wall of the second plugging groove is fixed to the bottom of the second limiting block.

[0010] A plurality of rollers are arranged at the bottom of the manhole cover along the circumferential direction of the first screw rod.

[0011] A supporting plate in contact with the manhole cover is fixed on the outer wall of the lifting pipe.

[0012] A sealing cover is screwed inside the first plug-in slot and above the lifting tube.

[0013] The outer wall of the base is fixed to the well ring through a bolt assembly, and the well ring is provided with a filling groove matched with the bolt assembly along the circumferential direction.

[0014] The bolt assembly includes a screw rod, a plurality of third mounting grooves are provided on the outer surface of the screw rod, a correction rod is rotatably installed inside the third mounting groove, a torsion spring is provided at the rotation connection between the correction rod and the third mounting groove, an inclined limit block is fixed to the inner bottom wall of the third mounting groove, a third plug-in groove is provided at the bottom of the screw rod, a third plug-in rod is slidably installed inside the third plug-in groove, a top block is fixed to the bottom of the third plug-in rod, and a third spring fixed to the inner wall of the third plug-in groove is fixed to the top of the third plug-in rod.

[0015] The technical effects achieved by the present invention are: 1. The present invention drives the first screw rod to rotate by a motor, and the first screw rod drives the lifting tube on the first moving block to move. The lifting tube can drive the manhole cover to move up and down in the base, ensuring the flatness of the road surface, no longer affecting the normal walking of passers-by, and improving the safety of equipment use.

[0016] 2. In the present invention, when the motor drives the first screw rod to rotate and the manhole cover moves to the top of the base, because the limiting groove cancels the restriction on the mounting block and the first limiting block, the first screw rod rotates and drives the first moving block to rotate accordingly, thereby driving the manhole cover to rotate through the lifting tube, which is convenient for opening the manhole cover. When closing the manhole cover, the first screw rod is driven to flip through the reversal of the motor, thereby driving the first moving block, the lifting tube and the manhole cover to flip. When the mounting block moves to the top of the limiting groove, the first limiting block is driven to fit into the limiting groove through the elastic force of the first spring. When the motor drives the first screw rod to continue to reverse, it can drive the first moving block to descend, thereby driving the manhole cover to move smoothly into the cover plate groove of the base, which is convenient for closing the manhole cover. The structure is simple and the operation is convenient. It is convenient for the staff to open and close the manhole cover, saves the trouble of prying open the manhole cover by manpower, and reduces the labor intensity.

[0017] 3. The support assembly provided in the present invention enables the support tube to always move synchronously with the manhole cover when it moves up and down in the base, and stably supports the manhole cover, thereby preventing the gravity of the manhole cover from acting entirely on the first screw rod, causing damage to the first screw rod for a long time, thereby improving the service life of the equipment. When the manhole cover moves to the top of the base, the support tube will stop moving upward, thereby preventing the top end of the support tube from moving out of the base and affecting the subsequent closing of the manhole cover. The present invention is relatively complete and practical.

[0018] 4. The manhole cover provided in the present invention is fixed to the lifting tube by bolts or buckles, and the connecting piece between the manhole cover and the lifting tube is arranged on the side wall of the manhole cover. When the manhole cover is closed, the connecting piece is located in the base. Compared with the traditional manhole cover, it is not easy for thieves to dismantle the manhole cover, thereby reducing the theft of the manhole cover and reducing the loss to municipal facilities. In addition, the installation of the manhole cover is relatively firm and stable, and the manhole cover is not easy to shake when a vehicle travels on it, which further improves the safety and stability of the equipment and also improves the service life of the manhole cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the front three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of a three-dimensional structure of a base of the present invention when viewed from above; Figure 3 It is a schematic diagram of the three-dimensional structure of the manhole cover of the present invention when viewed from above; Figure 4 It is a schematic diagram of the main cutaway structure of the present invention; Figure 5 It is a schematic diagram of the main structure of the base and the manhole cover of the present invention in an open state; Figure 6 It is a top view cutaway three-dimensional structural schematic diagram of the support assembly of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the bolt assembly of the present invention; Figure 8 is a schematic cross-sectional structural diagram of a bolt assembly of the present invention; Fig. 9 The present invention Figure 4 A schematic diagram of the enlarged structure of the middle A area; Fig.10 It is a schematic cross-sectional structure diagram of the base and the manhole cover of the present invention being installed on the ground.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Base; 2. Manhole cover; 3. First screw rod; 4. Connecting groove; 5. Lifting tube; 6. First plug-in groove; 7. First moving block; 8. Motor; 9. Mounting block; 10. First mounting groove; 11. First guide rod; 12. First stop block; 13. First spring; 14. Stop groove; 15. Roller; 16. Second mounting groove; 17. First annular slide groove; 18. Internal gear ring; 19. First gear; 20. Second screw rod; 21. The second gear; 22. The second moving block; 23. The supporting tube; 24. The fixed tube; 25. The first slide groove; 26. The first slider; 27. The second annular slide groove; 28. The second plug-in groove; 29. ​​The second limit block; 30. The second spring; 31. The supporting plate; 32. The sealing cover; 33. The screw rod; 34. The third mounting groove; 35. The correcting rod; 36. The third plug-in groove; 37. The third plug-in rod; 38. The third spring; 39. The top block. DETAILED DESCRIPTION

[0021] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0022] like Figure 1-Figure 5 As shown, a municipal manhole cover comprises a base 1, a manhole cover 2 is arranged in the cover plate groove of the base 1, a second installation groove 16 is opened inside the base 1, a connecting groove 4 connected to the cover plate groove is opened on the inner top of the second installation groove 16, a motor 8 is arranged on the inner bottom wall of the second installation groove 16, a first screw rod 3 is arranged on the output shaft of the motor 8, and the first screw rod 3 passes through the inside of the connecting groove 4, a supporting ear rotatably connected to the first screw rod 3 is arranged on the inner side of the second installation groove 16, so as to improve the stability of the installation of the first screw rod 3, a first moving block 7 is screwed on the outer wall of the first screw rod 3, a lifting tube 5 fixed to the first moving block 7 is sleeved on the outer surface of the first screw rod 3, the lifting tube 5 is a tube body with openings at both ends, so as to facilitate the insertion of an external hexagonal wrench, and the outer wall of the lifting tube 5 A support plate 31 in contact with the manhole cover 2 is fixed, which can further support the manhole cover 2 and improve the stability of the installation of the manhole cover 2. A first plug-in slot 6 matching the lifting tube 5 is provided through the outer wall of the manhole cover 2. The lifting tube 5 is detachably connected to the first plug-in slot 6. The first plug-in slot 6 and the lifting tube 5 are fixed to each other by bolts or buckles, and the bolts or buckles are arranged on the side wall of the manhole cover 2. The lifting tube 5 is fixed to the first plug-in slot 6 by bolts or buckles, so as to facilitate the separation of the manhole cover 2 and the lifting tube 5, and facilitate the installation and removal of the manhole cover. A hexagonal slot is arranged on the top of the first screw rod 3, and the arranged hexagonal slot can easily rotate the first screw rod 3 by an external hexagonal wrench. A first limit assembly is arranged on one side of the manhole cover 2, and a plurality of support assemblies are arranged in the cover plate groove of the base 1; A plurality of rollers 15 are arranged at the bottom of the manhole cover 2 along the circumferential direction of the first screw rod 3, so as to facilitate the rotation of the manhole cover 2 on the road surface, effectively reduce the friction between the manhole cover 2 and the ground, and avoid the wear of the manhole cover 2; a sealing cover 32 is screwed on the inside of the first plug-in slot 6 and above the lifting tube 5, and the top of the sealing cover 32 is provided with the same pattern as the surface of the manhole cover 2, so that it is not easy to find the first plug-in slot 6 of the manhole cover 2, and the setting of the sealing cover 32 can also prevent the intrusion of impurities and affect the subsequent normal use; The first limiting assembly includes a mounting block 9 fixed to one side of the manhole cover 2, a limiting groove 14 cooperating with the mounting block 9 is provided on the inner side of the base 1, a first mounting groove 10 is provided at the bottom of the mounting block 9, a first limiting block 12 is slidably installed inside the first mounting groove 10, a first guide rod 11 is fixed to the inner top of the first mounting groove 10, a first guide hole cooperating with the first guide rod 11 is provided on the top of the first limiting block 12, a first spring 13 is fixed to the top of the first limiting block 12, and the top of the first spring 13 is fixed to the inner wall of the first mounting groove 10, a first inclined sliding surface is provided on one side of the bottom of the first limiting block 12, and when the manhole cover 2 is opened, the first limiting block 12 is opened. The cover 2 moves upward, driving the mounting block 9 to move upward. When the mounting block 9 moves to above the limiting groove 14, the limiting groove 14 can cancel the restriction on the mounting block 9, and the first screw rod 3 can drive the manhole cover 2 to rotate. The first inclined sliding surface can also enable the first limiting block 12 to rotate smoothly and disengage from the limiting groove 14; when the manhole cover 2 is driven to reset and reverse, and the mounting block 9 moves to above the limiting groove 14, the elastic force of the first spring 13 drives the first limiting block 12 to move downward, so that the first limiting block 12 extends into the limiting groove 14, limiting the rotation of the manhole cover 2. Continuing to rotate the first screw rod 3 can drive the manhole cover 2 to fall back into the cover plate groove on the base 1.

[0023] According to the above structure, the motor 8 is started, the motor 8 drives the first screw rod 3 to rotate, the first screw rod 3 drives the first moving block 7 to move up, the first moving block 7 drives the lifting tube 5 to move up, and the lifting tube 5 can drive the manhole cover 2 to move up and down, thereby avoiding the problem of height difference with the ground that often occurs after the manhole cover 2 is installed in the past, thereby ensuring the flatness of the road surface and no longer affecting the normal walking of passers-by. When the first screw rod 3 continues to rotate until the manhole cover 2 moves above the cover plate groove of the base 1, at this time, the mounting block 9 is disengaged from the limiting groove 14, and the rotation of the first screw rod 3 will drive the first moving block 7 to rotate synchronously, and then drive the lifting tube 5 to move up and down. 5 also rotates accordingly, and through the first spring 13 and the first inclined sliding surface on one side of the bottom of the first limit block 12, the first limit block 12 can also be smoothly separated from the limit groove 14, so that the manhole cover 2 is convenient to open to one side around the first screw rod 3. The roller 15 provided can make the manhole cover 2 move smoothly on the ground, so that the manhole cover 2 can be conveniently opened; the bolts on one side of the manhole cover 2 are removed to facilitate the separation of the lifting tube 5 from the manhole cover 2, and the manhole cover 2 can be replaced. After replacement, the bolts are tightened again so that one end of the bolt passes through the manhole cover 2 and abuts against the lifting tube 5 to fix the lifting tube 5, and then the motor 8 is started again to flip, driving the first screw rod 3 is reversed, the first screw rod 3 drives the first moving block 7 and the lifting tube 5 to reverse, and drives the manhole cover 2 to reverse. When the manhole cover 2 moves to the top of the cover plate groove of the base 1, the mounting block 9 also moves to the top of the limiting groove 14. At this time, the first limiting block 12 is driven to move downward and extend into the limiting groove 14 through the elastic force of the first spring 13, so as to limit the rotation of the manhole cover 2. The first screw rod 3 continues to rotate, driving the first moving block 7 to move downward. The first moving block 7 drives the manhole cover 2 on the lifting tube 5 to move downward, so that the manhole cover 2 smoothly enters the cover plate groove of the base 1. The structure is simple and the operation is convenient. The manhole cover 2 is fixedly connected to the lifting tube 5. The stability of the manhole cover 2 is improved, and the shaking of the manhole cover 2 caused by the movable connection of the traditional manhole cover 2 when a car is driving on it is avoided, which may easily cause the manhole cover 2 to be damaged for a long time and cause safety hazards to the driving vehicle, thereby improving the safety of the equipment. In addition, the bolts of the fixing parts of the manhole cover 2 and the lifting tube 5 are arranged on the side of the manhole cover 2, which are not easy to be found by thieves and are not convenient for thieves to disassemble it. Compared with the traditional manhole cover 2, the anti-theft effect of the equipment is better. In addition, when the motor 8 fails, the sealing cover 32 is opened, and an external hexagonal wrench is inserted into the hexagonal groove, and then the hexagonal wrench is turned to drive the first screw rod 3 to rotate.

[0024] like Figure 2 , Figure 4 and Figure 6As shown, the outer wall of the first screw rod 3 is located in the second mounting groove 16 and a first gear 19 is fixed thereon, and a first annular slide groove 17 is provided on the inner side of the second mounting groove 16, and an inner gear ring 18 meshing with the first gear 19 is slidably installed inside the first annular slide groove 17, and the first gear 19 can be driven to rotate by the rotation of the first screw rod 3, and the first gear 19 drives the inner gear ring 18 to rotate, which is more practical; the supporting assembly includes a plurality of fixed tubes 24 fixedly passed through the inner top of the second mounting groove 16, a supporting tube 23 is provided inside the fixed tube 24, and a plurality of second screw rods 20 are rotatably installed on the inner bottom of the second mounting groove 16, and a second moving block 22 is rotatably connected to the outer wall of the second screw rod 20 and located in the supporting tube 23, and the second moving block 22 is fixed to the inner side of the supporting tube 23, and a second gear 21 meshing with the inner gear ring 18 is fixed on the outer wall of the second screw rod 20, and the structure is simple, and when the manhole cover 2 moves up, the supporting tube 23 can synchronously follow the upward movement and support the manhole cover 2, so as to avoid the well cover 2 from being blocked. The gravity of the cover 2 acts entirely on the first screw rod 3, which improves the stability of the installation of the manhole cover 2 and also improves the service life of the first screw rod 3; the outer wall of the support tube 23 is fixed with two first sliding blocks 26, the inner side of the fixed tube 24 is provided with a first sliding groove 25 slidably connected to the first sliding groove 26, the inner side of the fixed tube 24 is provided with a second annular sliding groove 27 connected to the top of the first sliding groove 25, the inner bottom of the second annular sliding groove 27 and close to the first sliding groove 25 is provided with a second plugging groove 28, the inner side of the second plugging groove 28 is slidably installed with a second limiting block 29, the top side of the second limiting block 29 is provided with a second inclined sliding surface, and the bottom of the second limiting block 29 is fixed with a second spring 30 fixed to the inner wall of the second plugging groove 28, the structure is simple, when the manhole cover 2 moves to the top of the base 1, the support tube 23 will not continue to move up, at this time, the first sliding block 26 moves into the second annular sliding groove 27, and the second screw rod 20 drives the second moving block 22 and the support tube 23 to rotate and not move up.

[0025] According to the above structure, the first gear 19 can be driven to rotate by the rotation of the first screw rod 3, the first gear 19 drives the inner gear ring 18 to rotate, the inner gear ring 18 drives the plurality of second gears 21 to rotate, the second gear 21 drives the second screw rod 20 to rotate, the second screw rod 20 drives the second moving block 22 to move, the second moving block 22 drives the support tube 23 to move, so that when the manhole cover 2 moves in the base 1, the support tube 23 can always support the manhole cover 2, and when the manhole cover 2 moves to the outside of the base 1, the first slider 26 also moves along the first slide groove 25 to the second slide groove 25. In the annular groove 27, when the second screw rod 20 continues to rotate, the support tube 23 cooperates with the first slider 26 and the second annular groove 27 to rotate, which can effectively prevent the support tube 23 from moving out of the base 1. When the second screw rod 20 reverses and the manhole cover 2 falls back into the base 1, the first slider 26 will be limited by the second limit block 29, so that the first slider 26 cannot rotate in the second annular groove 27, so that during the reversal of the second screw rod 20, the second moving block 22 and the support tube 23 are driven to move downward, so that the first slider 26 slides into the first groove 25.

[0026] like Figure 7 , Figure 8 and Fig.10 The screw rod 33 is provided with a third spring 38 which is fixed to the base 1 through the third screw rod 33. The third spring 38 is provided at the top of the third screw rod 33 and is screwed to the base 1 through the third screw rod 33.

[0027] According to the above mechanism, when the screw 33 is inserted into the filling groove, the top block 39 touches the bottom and the screw 33 is pressed down. The elastic force of the third spring 38 moves the screw 33 upward. At the same time, due to the action of the torsion spring and the upper inclined limit block, the correction rod 35 is tilted and unfolded, and stably inserted into the filling groove, avoiding the screw 33 from tilting after filling with the anchor glue, thereby improving the fixing stability and accuracy of the base 1.

[0028] The working principle of the present invention is as follows: the motor 8 is started, the motor 8 drives the first screw rod 3 to rotate, the first screw rod 3 drives the first moving block 7 to move upward, the first moving block 7 drives the lifting tube 5 to move upward, the lifting tube 5 can drive the manhole cover 2 to move up and down, and the first screw rod 3 can drive the first gear 19 to rotate through the rotation, the first gear 19 drives the inner gear ring 18 to rotate, the inner gear ring 18 drives multiple second gears 21 to rotate, the second gear 21 drives the second screw rod 20 to rotate, the second screw rod 20 drives the second moving block 22 to move, the second moving block 22 drives the support tube 23 to move, so that when the manhole cover 2 moves in the base 1, the support tube 23 can always support the manhole cover 2, when the first screw rod 3 continues to rotate until the manhole cover 2 moves to the top of the cover plate groove of the base 1. At this time, the mounting block 9 is disengaged from the limiting groove 14, and the rotation of the first screw rod 3 will drive the first moving block 7 to rotate synchronously, and then drive the lifting tube 5 to rotate accordingly. Through the first spring 13 and the first inclined sliding surface on the bottom side of the first limiting block 12, the first limiting block 12 can also be smoothly disengaged from the limiting groove 14, so that the manhole cover 2 is convenient to open to one side around the first screw rod 3. At this time, the first sliding block 26 also moves along the first sliding groove 25 into the second annular sliding groove 27. When the second screw rod 20 continues to rotate, the support tube 23 cooperates with the first sliding block 26 and the second annular sliding groove 27 to rotate, which can effectively avoid the support The tube 23 is moved out of the base 1 to avoid affecting the rotation of the manhole cover 2. The roller 15 is set so that the manhole cover 2 can move smoothly on the ground, so that the manhole cover 2 can be easily opened; the bolts on one side of the manhole cover 2 are removed to facilitate the separation of the lifting tube 5 from the manhole cover 2, and the manhole cover 2 can be replaced. After replacement, the bolts are tightened again so that one end of the bolt passes through the manhole cover 2 and abuts against the lifting tube 5 to fix the lifting tube 5, and then the motor 8 is started again to flip, driving the first screw rod 3 to reverse, the first screw rod 3 drives the first moving block 7 and the lifting tube 5 to reverse, and drives the manhole cover 2 to reverse. When the manhole cover 2 moves to the top of the cover plate slot of the base 1, the mounting block 9 also moves to the top of the limit slot 14. At this time, The elastic force of the first spring 13 drives the first limit block 12 to move downward and extend into the limit groove 14, so as to limit the rotation of the manhole cover 2. The first screw rod 3 continues to rotate, driving the first moving block 7 to move downward. The first moving block 7 drives the manhole cover 2 on the lifting tube 5 to move downward. At the same time, the second screw rod 20 reverses. When the manhole cover 2 falls back into the base 1, the first slider 26 is limited by the second limit block 29, so that the first slider 26 cannot rotate in the second annular groove 27. Therefore, during the reversal of the second screw rod 20, the second moving block 22 and the support tube 23 are driven to move downward, so that the first slider 26 slides into the first groove 25, so that the manhole cover 2 smoothly enters the cover groove of the base 1.

[0029] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A municipal manhole cover, comprising a base (1), a manhole cover (2) being arranged in a cover plate groove of the base (1), characterized in that: The base (1) is provided with a second mounting groove (16) inside, the inner top of the second mounting groove (16) is provided with a connecting groove (4) connected to the cover plate groove, the inner bottom wall of the second mounting groove (16) is provided with a motor (8), the output shaft of the motor (8) is provided with a first screw rod (3), and the first screw rod (3) passes through the inside of the connecting groove (4), the outer wall of the first screw rod (3) is screwed with a first moving block (7), the outer surface of the first screw rod (3) is sleeved with a lifting tube (5) fixed to the first moving block (7), the outer wall of the manhole cover (2) is provided with a first plug-in groove (6) matching the lifting tube (5), the lifting tube (5) is detachably connected to the first plug-in groove (6), the top of the first screw rod (3) is provided with a hexagonal groove, one side of the manhole cover (2) is provided with a first limit assembly, and a plurality of support assemblies are provided in the cover plate groove of the base (1); The first limiting assembly comprises a mounting block (9) fixed on one side of the manhole cover (2), a limiting groove (14) cooperating with the mounting block (9) is provided on the inner side of the base (1), a first mounting groove (10) is provided on the bottom of the mounting block (9), a first limiting block (12) is slidably mounted inside the first mounting groove (10), a first guide rod (11) is fixed on the inner top of the first mounting groove (10), a first guide hole cooperating with the first guide rod (11) is provided on the top of the first limiting block (12), a first spring (13) is fixed on the top of the first limiting block (12), and the top of the first spring (13) is fixed to the inner wall of the first mounting groove (10), and a first inclined sliding surface is provided on one side of the bottom of the first limiting block (12).

2. A municipal manhole cover according to claim 1, characterized in that: The first insertion slot (6) and the lifting tube (5) are fixed to each other via bolts or buckles, and the bolts or buckles are arranged on the side wall of the manhole cover (2).

3. A municipal manhole cover according to claim 1, characterized in that: A first gear (19) is fixedly mounted on the outer wall of the first screw rod (3) in the second mounting groove (16), a first annular slide groove (17) is provided on the inner side of the second mounting groove (16), and an inner gear ring (18) meshing with the first gear (19) is slidably mounted inside the first annular slide groove (17).

4. A municipal manhole cover according to claim 1, characterized in that: The support assembly comprises a plurality of fixed tubes (24) passing through and fixed at the inner top of the second mounting groove (16); a support tube (23) is arranged inside the fixed tube (24); a plurality of second screw rods (20) are rotatably mounted at the inner bottom of the second mounting groove (16); a second movable block (22) is rotatably connected to the outer wall of the second screw rod (20) and located inside the support tube (23); the second movable block (22) is fixed to the inner side of the support tube (23); and a second gear (21) meshing with the inner gear ring (18) is fixed to the outer wall of the second screw rod (20).

5. A municipal manhole cover according to claim 4, characterized in that: Two first sliding blocks (26) are fixed to the outer wall of the support tube (23); a first sliding groove (25) slidably connected to the first sliding block (26) is provided on the inner side of the fixed tube (24); a second annular sliding groove (27) communicating with the top of the first sliding groove (25) is provided on the inner side of the fixed tube (24); a second plugging groove (28) is provided at the inner bottom of the second annular sliding groove (27) and close to the first sliding groove (25); a second limiting block (29) is slidably installed inside the second plugging groove (28); a second inclined sliding surface is provided on one side of the top of the second limiting block (29); and a second spring (30) fixed to the inner wall of the second plugging groove (28) is fixed to the bottom of the second limiting block (29).

6. A municipal manhole cover according to claim 1, characterized in that: A plurality of rollers (15) are arranged at the bottom of the manhole cover (2) along the circumferential direction of the first screw rod (3).

7. A municipal manhole cover according to claim 1, characterized in that: A support plate (31) in contact with the manhole cover (2) is fixed to the outer wall of the lifting pipe (5).

8. The municipal manhole cover according to claim 1, characterized in that: A sealing cover (32) is screwed on the inside of the first plug-in slot (6) and located above the lifting tube (5).

9. The municipal manhole cover according to claim 1, characterized in that: The outer wall of the base (1) is fixed to the well ring by means of a bolt assembly, and the well ring is provided with a filling groove cooperating with the bolt assembly along the circumferential direction.

10. A municipal manhole cover according to claim 9, characterized in that: The bolt assembly comprises a screw rod (33), a plurality of third installation grooves (34) are provided on the outer surface of the screw rod (33), a correction rod (35) is rotatably installed inside the third installation groove (34), a torsion spring is provided at the rotation connection between the correction rod (35) and the third installation groove (34), an inclined surface limit block is fixed to the inner bottom wall of the third installation groove (34), a third plug-in groove (36) is provided at the bottom of the screw rod (33), a third plug-in rod (37) is slidably installed inside the third plug-in groove (36), a top block (39) is fixed at the bottom of the third plug-in rod (37), and a third spring (38) fixed to the inner wall of the third plug-in groove (36) is fixed at the top of the third plug-in rod (37).

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