Manhole cover dismounting device

Abstract

The utility model provides a kind of well lid dismounting device, including magnetic attraction component and lift component, the magnetic attraction component includes first support and the two electromagnets of being able to synchronous lifting being set on the first support;The lift component includes second support and the two telescopic supporting plates of being able to synchronous lifting being set on the second support;The first support and the second support are placed in the outside of well lid to be dismounted, the two electromagnets are symmetrical about the first center line of well lid and all are towards the upper side of well lid, the two telescopic supporting plates are symmetrical about the second center line of well lid, and all are by well lid outside to well lid, the first center line and the second center line are perpendicular to each other.The utility model can automatically dismount well lid, saves manpower, and dismounts stability.

Description

Technical Field

[0001] This utility model relates to the field of municipal manhole construction technology, and more specifically, to a manhole cover disassembly and assembly device. Background Technology

[0002] In municipal engineering, manholes are vertically installed underground tubular structures for water intake or groundwater protection. They serve as water supply and drainage facilities for industrial and agricultural production, transportation, urban development, and national defense, and often require regular maintenance. However, during manhole maintenance, the removal of the manhole cover is usually done manually. The manhole cover is quite heavy, and without assistance, it is extremely difficult for one person to remove it. Furthermore, manual removal can easily result in injury due to loss of strength. Utility Model Content

[0003] In view of the above problems, the purpose of this utility model is to provide a manhole cover disassembly and assembly device, which saves manpower and is stable in disassembly and assembly.

[0004] This utility model provides a manhole cover disassembly and assembly device, comprising a magnetic suction component and a lifting component, wherein...

[0005] The magnetic attraction component includes a first bracket and two electromagnets that can be synchronously raised and lowered, which are mounted on the first bracket.

[0006] The lifting component includes a second bracket and two telescopic trays that can be raised and lowered synchronously, mounted on the second bracket.

[0007] Both the first bracket and the second bracket are placed outside the manhole cover to be removed. The two electromagnets are symmetrical about the first center line of the manhole cover and both face the upper side of the manhole cover. The two telescopic support plates are symmetrical about the second center line of the manhole cover and both extend from outside the manhole cover toward the manhole cover. The first center line and the second center line are perpendicular to each other.

[0008] One optional solution is that the first support includes two vertically arranged first square columns, each with a first groove on its opposite side. A first lead screw is provided in the first groove, and a first lifting block is screwed onto the first lead screw. The outer wall of the first lifting block is slidably connected to the inner wall of the first groove. A horizontal first fixing frame is connected to the side of the first lifting block facing the outside of the first groove, and the electromagnet is provided at the outer end of the first fixing frame.

[0009] One option is that the first fixing frame includes two connecting plates connected side by side to the first lifting block and a fixing block connected to the ends of the two connecting plates. A power source is provided above the fixing block. The upper part of the electromagnet is fixedly connected to the lower part of the fixing block. The magnetic end of the electromagnet faces downward. The power source is electrically connected to the wire of the electromagnet.

[0010] One optional embodiment is that the second support includes two vertically arranged second square columns, the height of which is less than the height of the first square column. A second groove is formed along the opposite sides of each of the two second square columns. A second lead screw is installed in each of the second grooves, and a second lifting block is screwed onto the second lead screw. The outer wall of the second lifting block is slidably connected to the inner wall of the second groove. A second fixing frame is connected to the outer side of the second lifting block facing the second groove. The telescopic tray includes a pneumatic telescopic rod and a tray connected to the telescopic rod of the pneumatic telescopic rod. The cylinder of the pneumatic telescopic rod is horizontally fixed in the second fixing frame, and the tray is horizontally arranged. The two second square columns are placed on the first center line, and the two first square columns are placed on the second center line. A first lead screw driving component is installed above the two first square columns, and a second lead screw driving component is installed above the two second square columns.

[0011] One option is that the second fixing frame includes a square frame connected to the second lifting block, and the two ends of the cylinder of the pneumatic telescopic rod are respectively fixed to the inner sides of two side frames of the square frame that are parallel to the second lead screw, and the telescopic rod of the pneumatic telescopic rod passes through the through holes on the corresponding side frames.

[0012] One optional embodiment is that the first lead screw drive component includes a first pulley connected to the end of the first lead screw that extends out of the top of the first groove, a first support plate connected to the upper end of the same-direction side of the two first square columns, a first connecting plate connected between the two first support plates, a first rotating motor provided in the upper middle part of the first connecting plate, the shaft of the first rotating motor facing upward and connected to a first intermediate wheel, and a first belt connected between the first intermediate wheel and the two first pulleys.

[0013] One optional embodiment is that the second lead screw drive component includes a second pulley connected to the end of the second lead screw that extends out of the top of the second groove; a second support plate is connected to the upper end of the same-direction sides of the two second square columns; a second connecting plate is connected between the two second support plates; a second rotating motor is provided in the middle of the upper side of the second connecting plate; the shaft of the second rotating motor faces upward and is connected to a second intermediate wheel; a second belt is connected between the second intermediate wheel and the two second pulleys; the second belt is located below the first support plate.

[0014] One option is to provide a pad at the lower end of each of the two second square pillars.

[0015] One option is to install brake wheels at the lower ends of both second square posts.

[0016] One option is to provide a base plate at the lower end of each of the two first square columns, and to provide through holes at the four corners of the base plate.

[0017] As described above, the manhole cover removal and installation device provided by this utility model includes a liftable magnetic suction component and a lifting component. After the magnetic suction component lifts the manhole cover, the lifting component extends under the manhole cover to support it. The magnetic suction component and the lifting component can work together to remove and lift the manhole cover. This utility model can automatically lift and clamp the manhole cover, ensuring stable lifting and thus automatically detaching the manhole cover from the manhole. It can also automatically transport and install the manhole cover, avoiding the time-consuming and laborious process of manually installing and removing manhole covers, which is also prone to injury from being hit by the manhole cover. Attached Figure Description

[0018] Other objects and results of this invention will become more apparent and readily understood upon referring to the following description taken in conjunction with the accompanying drawings, and with a more complete understanding of the invention. In the drawings:

[0019] Figure 1 This is a structural schematic diagram of the manhole cover disassembly and assembly device according to Embodiment 1 of this utility model;

[0020] Figure 2 This is a schematic diagram of the magnetic suction component according to Embodiment 1 of the present invention;

[0021] Figure 3 This is a structural schematic diagram of the supporting component according to Embodiment 1 of the present utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the first lead screw drive component according to Embodiment 1 of the present invention;

[0023] Figure 5 This is a schematic diagram of the manhole cover disassembly and assembly device according to Embodiment 2 of this utility model;

[0024] Among them, 1-magnetic suction component, 11-electromagnet, 12-first bracket, 121-first square column, 122-first groove, 123-first lead screw, 124-first lifting block, 13-first fixing frame, 131-connecting plate, 132-fixing block, 14-power supply, 15-first lead screw drive component, 151-first pulley, 152-first support plate, 153-first connecting plate, 154-first rotating motor, 155-first intermediate wheel, 156-first belt, 16-base plate, 17-through hole;

[0025] 2-Lifting component, 21-Second bracket, 211-Second square column, 212-Second groove, 213-Second lead screw, 214-Second lifting block, 22-Telescopic support plate, 221-Pneumatic telescopic rod, 222-Support plate, 23-Second fixed frame, 231-Square frame, 24-Second lead screw drive component, 241-Second pulley, 242-Second support plate, 243-Second connecting plate, 244-Second rotating motor, 245-Second intermediate wheel, 246-Second belt, 25-Pad plate, 26-Wheel;

[0026] In all the accompanying drawings, the same reference numerals indicate similar or corresponding features or functions. Detailed Implementation

[0027] This invention can be modified in various ways and has various embodiments, with specific embodiments illustrated in the accompanying drawings. However, this invention is not limited to this specific implementation and all modifications, equivalents, and substitutions falling within the spirit and technical scope of this invention are to be understood as included.

[0028] Ordinal terms such as "first," "second," etc., may be used to describe various constituent elements, but the constituent elements are not limited to these terms. The terms are used only to distinguish one constituent element from another. For example, without departing from the scope of the claims of this utility model, a second constituent element may be named a first constituent element, and similarly, a first constituent element may be named a second constituent element. Terms and / or include combinations of multiple associated items or one of multiple associated items.

[0029] It should be understood that when referring to a constituent element being "connected" or "in contact" with other constituent elements, this includes not only cases where it is directly connected or in contact with other constituent elements, but also cases where other constituent elements exist between them. Conversely, when referring to a constituent element being "directly connected" or "directly in contact" with other constituent elements, it should be understood that no other constituent elements exist between them.

[0030] In the description of the embodiments, when it is stated that a certain component is formed "on or under" other components, "on or under" includes both two components that are in direct contact with each other and at least one other component that is configured to be formed between the two components. Furthermore, when expressed as "on or under", based on a certain component, it refers not only to the upper direction but may also include the lower direction.

[0031] The terminology used in this application is for illustrative purposes only and is not intended to limit the scope of the invention. Unless the context clearly specifies otherwise, singular expressions include plural expressions. In this application, terms such as "comprising" or "having" are used to specify the presence of features, numbers, steps, operations, constituent elements, components, or combinations thereof described in the specification, and do not preclude the presence or additional possibilities of one or more other features, numbers, steps, operations, constituent elements, components, or combinations thereof.

[0032] Unless otherwise defined, including technical or scientific terms, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. Terms as defined in commonly used dictionaries should be interpreted in a meaning consistent with their meaning in the context of the relevant art, and should not be construed as having an ideal or overly formal meaning unless explicitly defined in this application.

[0033] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0034] Example 1

[0035] like Figures 1-4 As shown, the manhole cover disassembly and assembly device proposed in this embodiment can be used for the disassembly and installation of manhole covers, and can also be used for lifting other thick iron plates.

[0036] This manhole cover removal and installation device includes a magnetic suction component 1 and a lifting component 2. The magnetic suction component 1 is used to attract the top of the manhole cover, thereby lifting the manhole cover. The lifting component 2 is used to support the bottom of the manhole cover. The magnetic suction component 1 and the lifting component 2 work together to clamp the manhole cover securely, so as to remove the manhole cover.

[0037] To stably lift the manhole cover, the magnetic suction component 1 may include a first support 12 and two electromagnets 11 mounted on the first support 12 that are capable of synchronously raising and lowering. The first support 12 supports the two electromagnets 11 and places them on the ground outside the manhole cover to be removed. For stable suction, the two electromagnets 11 are symmetrical about a first center line of the manhole cover and face each other towards the upper side of the manhole cover. The two electromagnets 11 uniformly attract the manhole cover and raise and lower it synchronously, which can horizontally and stably lift the manhole cover.

[0038] The electromagnet 11 can be powered on to attract magnetic forces when in use, and disconnected from power when not in use, so it has no magnetic attraction and is easy to use.

[0039] To stably support the manhole cover, the supporting component 2 may include a second bracket 21 and two telescopic support plates 22 mounted on the second bracket 21, capable of synchronously raising and lowering. Both telescopic support plates 22 can extend outward from the manhole cover. The second bracket 21 supports the two telescopic support plates 22, placing them on the ground outside the manhole cover to be removed. For stable support, the two telescopic support plates 22 are symmetrical and horizontal about the second center line of the manhole cover. The two telescopic support plates 22 can evenly lift the manhole cover, and their synchronous raising and lowering can stably support the manhole cover horizontally.

[0040] Before the manhole cover is lifted, both telescopic support plates 22 are positioned outside the manhole cover, not obstructing its raising. After the manhole cover is raised above the two telescopic support plates 22, the two support plates 22 extend to support the bottom of the manhole cover. The two telescopic support plates 22 and the two electromagnets 11 horizontally clamp the manhole cover. If further lifting is required, the two telescopic support plates 22 and the two electromagnets 11 move up and down synchronously to raise the manhole cover further. If lifting is not required, the electromagnets 11 can be de-energized, and the electromagnets 11 can be moved upwards, leaving the manhole cover supported only by the two telescopic support plates 22. The manhole cover can then be transported out by forklift or manually. The initial position of the two telescopic support plates 22 should not be too high; they should extend immediately after the manhole cover leaves the manhole opening to support it and prevent it from falling.

[0041] To ensure stable clamping, the first and second center lines are perpendicular to each other, and the two telescopic support plates 22 and two electromagnets 11 are evenly distributed on the manhole cover, achieving balanced clamping.

[0042] In one specific embodiment of this utility model, to ensure stable lifting of the electromagnet 11, the first support 12 may include two vertically arranged first square columns 121. Each of the two first square columns has a first groove 122 on its opposite side. A first lead screw 123 is disposed within the first groove 122, and a first lifting block 124 is screwed onto the first lead screw 123. The outer wall of the first lifting block 124 is slidably connected to the inner wall of the first groove 122. A horizontal first fixing frame 13 is connected to the side of the first lifting block 124 facing the outside of the first groove 122, and the electromagnet 11 is disposed at the outer end of the first fixing frame 13.

[0043] A first groove 122 is opened in each of the two first square posts 121. The upper and lower ends of the first groove 122 are closed. A rotatable first screw rod 123 is set in the first groove 122. The upper and lower ends of the first screw rod 123 are respectively inserted into the upper and lower closed end plates of the first groove 122. The distance between the two first square posts 121 should be slightly greater than the width or diameter of the manhole cover. The manhole cover can be square or round.

[0044] The three side walls of the first lifting block 124 are slidably connected to the inner wall of the first groove 122 via a sliding rail. The first lifting block 124 is confined within the first groove 122 and can move smoothly up and down with the rotation of the first lead screw 123. The electromagnet 11 is connected to the first lifting block 124 via the first fixing frame 13 to drive the electromagnet 11 to move up and down. The first fixing frame 13 allows the electromagnet 11 to be positioned above the manhole cover; in this embodiment, the electromagnet 11 is approximately directly facing the edge of the manhole cover.

[0045] In a specific embodiment of this utility model, in order to stably connect the electromagnet 11, the first fixing frame 13 may include two connecting plates 131 connected side by side to the first lifting block 124 and a fixing block 132 connected to the ends of the two connecting plates 131. A power supply 14 is provided above the fixing block 132. The upper part of the electromagnet 11 is fixedly connected to the lower part of the fixing block 132. The magnetic end of the electromagnet 11 faces downward. The power supply 14 is electrically connected to the wire of the electromagnet 11.

[0046] The two rectangular connecting plates 131 are connected to the first lifting block 124 along their width sides, both of which are vertically oriented. A cuboid fixing block 132 is connected to the other pair of width sides of the two rectangles. The fixing block 132 is used to mount the electromagnet 11 and the power supply 14. The power supply 14 supplies power to the electromagnet 11, facilitating its use in outdoor environments. It allows for flexible switching of power on and off of the electromagnet 11 as needed, ensuring flexible attraction.

[0047] In a specific embodiment of this utility model, in order to stably raise and lower the telescopic pallet 22, the second support 21 may include two vertically arranged second square columns 211, the height of the second square columns 211 being less than the height of the first square column 121. A second groove 212 is provided along the opposite sides of the two second columns. A second lead screw 213 is provided in the second groove 212. A second lifting block 214 is screwed onto the second lead screw 213. The outer wall of the second lifting block 214 is slidably connected to the inner wall of the second groove 212. A second fixing frame 23 is connected to the side of the second lifting block 214 facing the outside of the second groove 212. The telescopic pallet 22 may include a pneumatic telescopic rod 221 and a pallet 222 connected to the telescopic rod of the pneumatic telescopic rod 221. The cylinder of the pneumatic telescopic rod 221 is horizontally fixed in the second fixing frame 23. The pallet 222 is horizontally arranged.

[0048] A second groove 212 is opened in each of the two second square posts 211. The upper and lower ends of the second groove 212 are closed. A rotatable second screw rod 213 is installed in the second groove 212. The upper and lower ends of the second screw rod 213 are respectively inserted into the upper and lower closed end plates of the second groove 212. The distance between the two second square posts 211 should be greater than the width or diameter of the manhole cover. The manhole cover can be square or round.

[0049] The three side walls of the second lifting block 214 are slidably connected to the inner wall of the second groove 212 via a sliding rail. The second lifting block 214 is confined within the second groove 212 and can move smoothly up and down with the rotation of the second lead screw 213. The telescopic support plate 22 is connected to the second lifting block 214 via the second fixed frame 23 to drive the telescopic support plate 22 to rise and fall. The cylinder of the pneumatic telescopic rod 221 of the telescopic support plate 22 is fixed in the second fixed frame 23, and the telescopic rod can extend and retract horizontally outside the second fixed frame 23. After the telescopic rod returns to its original position, the support plate 222 is horizontally located on both sides of the manhole cover. After the telescopic rod extends, it supports the lower side of the manhole cover. In this embodiment, after the support plate 222 extends, it can support the edge of the manhole cover 10cm-20cm inward.

[0050] To ensure stable lifting, two second square columns 211 are placed on the first center line, two first square columns 121 are placed on the second center line, and two electromagnets 11 and two support plates 222 are evenly distributed on the manhole cover. For stable lifting and lowering of the two electromagnets 11 and the two telescopic support plates 22, a first lead screw drive component 15 is installed above the two first square columns 121 to drive the two first lead screws 123 to rotate synchronously, and a second lead screw drive component 24 is installed above the two second square columns 211 to drive the two second lead screws 213 to rotate synchronously.

[0051] In one specific embodiment of this utility model, in order to stably connect the telescopic tray 22, the second fixing frame 23 may include a square frame 231 connected to the second lifting block 214. The square frame 231 is formed by a rectangular plate and is vertically fixed to the second lifting block 214. The two ends of the cylinder of the pneumatic telescopic rod 221 are respectively fixed to the inner sides of the two side frames of the square frame 231 that are parallel to the second lead screw 213. The cylinder is stably fixed in the square frame 231. The telescopic rod of the pneumatic telescopic rod 221 passes through the through hole 17 on the corresponding side frame. The telescopic rod extends and retracts outside the square frame 231 to drive the tray 222 to move horizontally.

[0052] In one specific embodiment of this utility model, for the synchronous lifting and lowering of the two electromagnets, the first lead screw drive component 15 may include a first pulley 151 connected to the end of the first lead screw 123 that extends out of the top of the first slot 122. First support plates 152 are connected to the upper ends of the same-direction sides of the two first square columns 121. A first connecting plate 153 is connected between the two first support plates 152. A first rotating motor 154 is disposed in the upper middle part of the first connecting plate 153. The shaft of the first rotating motor 154 faces upward and is connected to a first intermediate pulley 155. A first belt 156 is connected between the first intermediate pulley 155 and the two first pulleys 151. The first belt 156 is a horizontal equilateral triangle. The rotation of the first rotating motor 154 drives the first intermediate pulley 155 to rotate, which in turn drives the first belt 156 to drive the two first pulleys 151 to rotate, thereby causing the two first lead screws 123 to rotate synchronously.

[0053] In one specific embodiment of this utility model, for the synchronous lifting and lowering of the two telescopic pallets 22, the second lead screw drive component 24 may include a second pulley 241 connected to the end of the second lead screw 213 that extends out of the top of the second groove 212. A second support plate 242 is connected to the upper end of the same-direction sides of the two second square columns 211. A second connecting plate 243 is connected between the two second support plates 242. A second rotating motor 244 is provided in the upper middle part of the second connecting plate 243. The shaft of the second rotating motor 244 faces upward and is connected to a second intermediate pulley 245. A second belt 246 is connected between the second intermediate pulley 245 and the two second pulleys 241. The second belt 246 is a horizontal equilateral triangle. The rotation of the second rotating motor 244 drives the second intermediate pulley 245 to rotate, which in turn drives the second belt 246 to drive the two second pulleys 241 to rotate, thereby causing the two second lead screws 213 to rotate synchronously.

[0054] To facilitate the placement of the magnetic suction component 1 and the lifting component 2, the height of the second belt 246 is slightly lower than the height of the first support plate 152. When the device is in use, the magnetic suction component 1 is placed just below the lifting component 2.

[0055] In one specific embodiment of this utility model, for the stability of the magnetic attraction component 1, a base plate 16 is provided at the lower end of each of the two first square columns 121, and through holes 17 are provided at the four corners of the base plate 16. The base plate 16 can be a thickened steel plate, which can stably support the ground. An anti-slip pad can also be placed under the base plate 16 to prevent the first square columns 121 from slipping. The base plate 16 can also be fixed to the ground by bolts provided in the through holes 17.

[0056] In one specific embodiment of this utility model, in order to stabilize the supporting member 2, a pad 25 is provided at the lower end of each of the two second square columns 211. The pad 25 can be a thickened steel plate, which can stably support the ground. An anti-slip pad can also be placed under the pad 25 to prevent the second square columns 211 from slipping.

[0057] Example 2

[0058] Figure 5 This is a schematic diagram of the manhole cover disassembly and assembly device according to Embodiment 2 of this utility model;

[0059] like Figure 5As shown, the manhole cover disassembly and assembly device provided in this embodiment, based on embodiment 1, is equipped with braked wheels 26 at the lower ends of the two second square columns 211 to facilitate easy movement of the raised manhole cover. When the manhole cover is raised, the wheels 26 brake, and the two second square columns 211 are stably supported on the ground. When the manhole cover is raised to a suitable height, the power supply 14 of the electromagnet 11 can be disconnected, the magnetic attraction disappears, and only the two telescopic support plates 22 lift the manhole cover. The brake is released, and the lifting component 2 is moved to slide the manhole cover out of the manhole opening.

[0060] The manhole cover disassembly and assembly device according to the present invention is described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various modifications can be made to the manhole cover disassembly and assembly device proposed in the present invention without departing from the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the contents of the appended claims.

Claims

1. A manhole cover disassembly and assembly device, characterized in that, Includes magnetic suction components and lifting components, among which, The magnetic attraction component includes a first bracket and two electromagnets that can be synchronously raised and lowered, which are mounted on the first bracket. The lifting component includes a second bracket and two telescopic trays that can be raised and lowered synchronously, mounted on the second bracket. Both the first bracket and the second bracket are placed outside the manhole cover to be removed. The two electromagnets are symmetrical about the first center line of the manhole cover and both face the upper side of the manhole cover. The two telescopic support plates are symmetrical about the second center line of the manhole cover and both extend from outside the manhole cover toward the manhole cover. The first center line and the second center line are perpendicular to each other.

2. The manhole cover disassembly and assembly device as described in claim 1, characterized in that, The first support includes two vertically arranged first square columns, and a first groove is provided on the opposite side of each of the two first square columns. A first lead screw is provided in the first groove, and a first lifting block is screwed onto the first lead screw. The outer wall of the first lifting block is slidably connected to the inner wall of the first groove. A horizontal first fixing frame is connected to the side of the first lifting block facing the outside of the first slot, and the electromagnet is disposed at the outer end of the first fixing frame.

3. The manhole cover disassembly and assembly device as described in claim 2, characterized in that, The first fixing frame includes two connecting plates connected side by side to the first lifting block and a fixing block connected to the ends of the two connecting plates. A power source is provided above the fixing block. The upper part of the electromagnet is fixedly connected to the lower part of the fixing block, with the magnetic end of the electromagnet facing downward. The power source is electrically connected to the wire of the electromagnet.

4. The manhole cover disassembly and assembly device as described in claim 2, characterized in that, The second support includes two vertically arranged second square columns, the height of which is less than that of the first square column. A second groove is provided on each of the two second square columns along their opposite sides. A second lead screw is provided in the second groove, and a second lifting block is screwed onto the second lead screw. The outer wall of the second lifting block is slidably connected to the inner wall of the second groove. A second fixed frame is connected to the side of the second lifting block facing the outside of the second groove. The telescopic tray includes a pneumatic telescopic rod and a tray connected to the telescopic rod of the pneumatic telescopic rod. The cylinder of the pneumatic telescopic rod is horizontally fixed in the second fixed frame, and the tray is horizontally set. The two second square pillars are placed on the first center line, the two first square pillars are placed on the second center line, a first lead screw drive component is provided above the two first square pillars, and a second lead screw drive component is provided above the two second square pillars.

5. The manhole cover disassembly and assembly device as described in claim 4, characterized in that, The second fixed frame includes a square frame connected to the second lifting block. The two ends of the cylinder of the pneumatic telescopic rod are respectively fixed to the inner sides of the two side frames of the square frame that are parallel to the second lead screw. The telescopic rod of the pneumatic telescopic rod passes through the through holes on the corresponding side frames.

6. The manhole cover disassembly and assembly device as described in claim 4, characterized in that, The first lead screw drive component includes a first pulley connected to the end of the first lead screw that extends out of the top of the first groove. A first support plate is connected to the upper end of the same-direction side of the two first square columns. A first connecting plate is connected between the two first support plates. A first rotating motor is provided in the middle of the upper side of the first connecting plate. The shaft of the first rotating motor faces upward and is connected to a first intermediate pulley. A first belt is connected between the first intermediate pulley and the two first pulleys.

7. The manhole cover disassembly and assembly device as described in claim 6, characterized in that, The second lead screw drive component includes a second pulley connected to the end of the second lead screw that extends out of the top of the second groove, a second support plate connected to the upper end of the same side of the two second square columns, a second connecting plate connected between the two second support plates, a second rotating motor provided in the middle of the upper side of the second connecting plate, the shaft of the second rotating motor facing upward and connected to a second intermediate wheel, and a second belt connected between the second intermediate wheel and the two second pulleys; The second belt is positioned below the first support plate.

8. The manhole cover disassembly and assembly device as described in claim 4, characterized in that, A pad is provided at the lower end of each of the two second square columns.

9. The manhole cover disassembly and assembly device as described in claim 4, characterized in that, Both of the second square pillars are equipped with braked wheels at their lower ends.

10. The manhole cover disassembly and assembly device as described in claim 2, characterized in that, A base plate is provided at the lower end of each of the two first square columns, and through holes are provided at the four corners of each base plate.

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