Well lid lifting device for municipal construction

Abstract

The utility model provides a manhole cover hoisting device for municipal construction, which comprises a top plate, the top of the top plate is provided with an unwinding mechanism and a clamping mechanism which are used for limiting a manhole cover, the bottom of the top plate is provided with four supporting columns which are distributed at equal intervals, and the surfaces of the four supporting columns are respectively provided with a mounting frame in a sliding manner; the bottoms of the four supporting columns are in threaded connection with a base through second threaded columns, four inserting assemblies distributed at equal intervals are arranged at the bottom of the mounting frame, a driving assembly used for adjusting the height of the inserting assemblies is arranged between the mounting frame and the base, a plurality of second grooves are formed in the surface of the base, and the second grooves are located under the inserting assemblies. The well lid lifting device for municipal construction provided by the utility model can be used on a hard ground and also can be used on a muddy ground, the phenomenon that the device slips when the device is used on the muddy ground is avoided, and the well lid lifting device has multiple purposes.

Description

Technical Field

[0001] This utility model relates to the field of municipal construction technology, and in particular to a manhole cover lifting device for municipal construction. Background Technology

[0002] Municipal construction refers to a series of engineering activities for the construction of urban infrastructure. It involves the construction and maintenance of urban public living facilities, including but not limited to urban roads, bridges, tunnels, rail transit, water supply and drainage systems, landscaping, environmental sanitation, lighting facilities, heating supply, gas supply, public transportation, as well as flood control and earthquake resistance projects. During municipal construction, it is often necessary to replace or repair manhole covers, and the replacement or repair usually requires the use of corresponding lifting devices to lift the manhole covers.

[0003] Existing manhole cover lifting devices used in municipal construction include a gantry crane and a height-adjustable lifting base. The lifting base houses a lifting assembly that is displaced by a screw drive. A locking pin is inserted into the hole in the manhole cover, and the sliding block tensions the lifting cable, ensuring stability during lifting and facilitating gripping and positioning before lifting. However, existing manhole cover lifting devices often face problems of slippage and device misalignment when operating on muddy ground. During lifting, the device's center of gravity shifts. Uneven weight distribution or improper lifting point selection can easily cause the device to lose balance and slip on muddy ground. Specifically, due to the soft and slippery soil, the bottom of the crane cannot provide sufficient friction and stability. When lifting on muddy ground, slippage easily occurs at the bottom, causing the entire device to shift. This not only affects lifting efficiency but also poses a threat to the surrounding environment and personnel safety.

[0004] Therefore, it is necessary to provide a new manhole cover lifting device for municipal construction to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a manhole cover lifting device for municipal construction.

[0006] The manhole cover lifting device for municipal construction provided by this utility model includes: a top plate, the top of which is provided with a roll-out mechanism and a clamping mechanism for limiting the manhole cover; four equidistant support columns are provided at the bottom of the top plate; mounting frames are slidably mounted on the surfaces of the four support columns; bases are threadedly connected to the bottoms of the four support columns via threaded columns; four equidistant mounting components are provided at the bottom of the mounting frames; a driving component for adjusting the height of the mounting components is provided between the mounting frames and the bases; and several grooves are provided on the surface of the bases, with the grooves located directly below the mounting components.

[0007] The insertion assembly includes a insertion rod, and a cleaning component for cleaning the surface of the insertion rod is provided in a plurality of the grooves. One end of the insertion rod is fixed with a threaded post, and one end of the insertion rod is threadedly connected to the bottom of the mounting bracket through the threaded post. The other end of the insertion rod is threaded, and the insertion rod is screwed onto the surface thread of the plug through the threaded shape.

[0008] Preferably, the surface of the base is provided with a plurality of grooves II, which are respectively located directly below a plurality of the insertion rods. The inner sidewall of each groove II is provided with a limiting groove II. A cleaning component is provided on the inner sidewall of each groove II. The cleaning component includes a first clamping plate, a second clamping plate, and a spring. The first clamping plate is fixed on the inner sidewall of the groove II. The second clamping plate slides on the inner sidewall of the groove II, and both ends of the second clamping plate slide on the inner sidewall of the limiting groove II. Both ends of the spring are fixedly connected to the second clamping plate and the inner sidewall of the groove II, respectively. The surfaces of both the first clamping plate and the second clamping plate are provided with slots for cleaning the surface of the insertion rods.

[0009] Preferably, each of the four support columns has a plurality of sliding grooves on its surface, and each of the four support columns has a mounting hole at its bottom. One end of the threaded column is threadedly connected to the inner wall of the mounting hole.

[0010] Preferably, the mounting bracket includes a sliding plate, which slides on the surface of the support column. A plurality of equally spaced sliders are fixed on the inner sidewall of the sliding plate, and a plurality of fixing blocks are fixed on the outer side of each of the sliders. A plurality of insertion components are threadedly connected to the bottom of the fixing blocks. The sliding plate slides on the inner sidewall of the grooves via the sliders. Two opposing fixing blocks are fixed on the outer side of the sliding plate, and a drive component is fixed on the bottom of the two fixing blocks.

[0011] Preferably, the drive assembly includes a hydraulic rod and a telescopic rod, one end of which is fixedly connected to the bottom of the two fixed blocks, and the other end of which is fixedly connected to the top of the base.

[0012] Preferably, a mounting plate is fixed to the top of the top plate. The surface of the mounting plate has a mounting groove for mounting a drive motor. A clamping mechanism is provided on the inner wall of the mounting plate. The clamping mechanism includes a lead screw, two sliding rods, two sliding plates, and clamping assemblies that slide on the surfaces of the two sliding plates. The lead screw rotates on the inner wall of the mounting plate. The two ends of the two sliding rods are fixed to the inner wall of the mounting plate, and the lead screw is located between the two sliding rods. The sliding plates are threaded to the surface of the lead screw and slide on the surfaces of the two sliding rods. Each surface of the two sliding plates has a limiting groove, and one of the sliding plates has a recess for mounting a geared motor. Furthermore, the first groove is located on one side of the first limiting groove. The rotor of the reduction motor passes through the surface of the first groove and is fixed with the second lead screw. The two ends of the second lead screw rotate on the inner sidewall of the first limiting groove. Two connecting plates slide on the surface of each of the two sliding plates. The two ends of the four connecting plates slide on the inner sidewall of the first limiting groove. The surfaces of the two connecting plates are threadedly connected to the surfaces of the second lead screw. Two telescopic plates are fixed to the connecting plates located between the two sliding plates. The two ends of the two telescopic plates are fixedly connected to the outer sides of the four connecting plates. A clamping plate for limiting the manhole cover is fixed to the bottom of the connecting plate. A clamping block is fixed to the bottom of the clamping plate, and the surface of the clamping plate is also provided with an anti-slip layer.

[0013] Preferably, the unwinding mechanism includes two unwinding assemblies, which are respectively fixed to the top of the mounting plate. The output ends of the two unwinding assemblies are fixed with ropes, and the bottom of each rope is fixed with a mounting block.

[0014] Compared with related technologies, the manhole cover lifting device for municipal construction provided by this utility model has the following beneficial effects:

[0015] 1. This utility model establishes an unwinding mechanism and a clamping mechanism on the top of the top plate. The clamping mechanism and the unwinding mechanism clamp and limit the fixing of the manhole cover to complete the lifting. An installation frame slides at the bottom of four equidistantly distributed support columns, and a base is threadedly connected to the bottom of the support columns. The bottom of the installation frame is provided with four equidistantly distributed insertion components. A drive component for adjusting the height of the insertion components is provided between the installation frame and the base. When the ground is muddy, the height of the insertion components is adjusted by activating the drive component, so that the insertion rod in the insertion component is inserted into the ground through the groove and fixed. When the ground is hard, only the height of the insertion components needs to be adjusted by activating the drive component, and the base provides support. After the insertion components are used, the insertion rod is pulled out by activating the drive component, and the mud on the surface of the insertion rod is cleaned by the cleaning component for easy use next time. This solves the problem that the bottom of the device is easy to slip when lifting on muddy ground, which can cause the entire device to shift. This device can be used on both hard and muddy ground and has multiple uses.

[0016] 2. This utility model features a detachable plug rod and a detachable base, facilitating the replacement and maintenance of the base. The top of the plug rod is threadedly connected to the bottom of the mounting bracket, and the plug rod is screwed onto the surface thread of the plug, making it easy to replace the plug and plug rod. When there is a problem with the base, plug rod, or plug, traditional fixed plugs often require the replacement of the entire plug rod when adjustments are needed. However, the plug rod of this device does not require disassembly of the entire device and can be replaced individually, simplifying operation and reducing maintenance costs. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of the manhole cover lifting device for municipal construction provided by this utility model;

[0018] Figure 2 This is a schematic diagram of the rope structure;

[0019] Figure 3 This is a schematic diagram of the clamping assembly.

[0020] Figure 4 A structural schematic diagram of the manhole cover lifting device for municipal construction provided by this utility model;

[0021] Figure 5 This is a schematic diagram of the card engagement assembly;

[0022] Figure 6 This is a diagram illustrating the installation of the base;

[0023] Figure 7 This is a schematic diagram of the insert rod.

[0024] Numbered in the diagram: 1. Top plate; 11. Support column; 111. Slide groove one; 112. Mounting hole; 12. Slide plate one; 121. Slider; 122. Fixing block one; 123. Fixing block two; 13. Hydraulic rod; 14. Telescopic rod; 2. Mounting plate; 21. Mounting groove; 22. Drive motor; 23. Lead screw one; 231. Slide rod; 24. Slide plate two; 241. Limiting groove one; 242. Groove one; 25. Connecting plate ; 251. Telescopic plate; 252. Clamping plate; 253. Clamping block; 26. Anti-slip layer; 3. Gear motor; 31. Lead screw II; 4. Insert rod; 41. Threaded; 42. Plug; 43. Threaded post; 5. Base; 51. Groove II; 511. Limiting groove II; 52. Clamping plate I; 521. Spring; 53. Clamping plate II; 54. Clamping slot; 55. Threaded post II; 6. Unwinding assembly; 61. Rope; 62. Mounting block. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Please refer to the following: Figures 1 to 7 ,in, Figure 1 A schematic diagram of the overall structure of the manhole cover lifting device for municipal construction provided by this utility model; Figure 2 This is a schematic diagram of the rope structure; Figure 3 This is a schematic diagram of the clamping assembly. Figure 4 A structural schematic diagram of the manhole cover lifting device for municipal construction provided by this utility model; Figure 5 This is a schematic diagram of the card engagement assembly; Figure 6 This is a diagram illustrating the installation of the base; Figure 7 This is a schematic diagram of the insert rod.

[0027] In some embodiments, such as Figures 1 to 7 As shown, it includes a top plate 1. The top of the top plate 1 is provided with a roll-out mechanism and a clamping mechanism for limiting the manhole cover. The bottom of the top plate 1 is provided with four equally spaced support columns 11. The surface of each of the four support columns 11 is slidably equipped with a mounting bracket. The bottom of each of the four support columns 11 is threadedly connected to a base 5 through a threaded column 55. The bottom of the mounting bracket is provided with four equally spaced insertion components. A drive component for adjusting the height of the insertion components is provided between the mounting bracket and the base 5. The surface of the base 5 is provided with several grooves 51. The grooves 51 are located directly below the insertion components.

[0028] The insertion assembly includes a plug rod 4, and a number of grooves 51 are provided with cleaning components for cleaning the surface of the plug rod 4. One end of the plug rod 4 is fixed with a threaded post 43, and one end of the plug rod 4 is connected to the bottom thread of the mounting bracket through the threaded post 43. The other end of the plug rod 4 is threaded 41, and the plug rod 4 is screwed to the surface thread of the plug 42 through the threaded post 41.

[0029] Each of the four support columns 11 has several sliding grooves 111 on its surface and mounting holes 112 at its bottom. One end of the threaded column 55 is threaded to the inner wall of the mounting hole 112. Installation and disassembly are completed by turning the thread.

[0030] The clamping mechanism and the unwinding mechanism clamp and limit the fixing of the manhole cover to complete the lifting;

[0031] The plug rod 4 and the base 5 are both detachable. The top of the plug rod 4 is threaded to the bottom of the mounting bracket. The plug rod 4 is screwed to the surface thread of the plug 42 through the thread 41, which also makes it easy to replace the plug 42 and the plug rod 4. When there is a problem with the base 5, the plug rod 4 or the plug 42, it is not necessary to disassemble the entire device. Instead, they can be replaced individually by simply unscrewing. This makes the operation simple and reduces maintenance costs.

[0032] Specifically, a mounting bracket slides at the bottom of four equidistantly distributed support columns 11, and a base 5 is threadedly connected to the bottom of the support columns 11. The bottom of the mounting bracket is provided with four equidistantly distributed insertion components. A drive component for adjusting the height of the insertion components is provided between the mounting bracket and the base 5. When the ground is muddy, the height of the insertion components is adjusted by activating the drive component, so that the insertion rod 4 inside the insertion component is inserted into the ground through the groove 51 and fixed. When the ground is hard, only the drive component needs to be activated to adjust the height of the insertion components, and the base 5 provides support. After the insertion components are used, the drive component is activated to pull out the insertion rod 4, and the mud on the surface of the insertion rod 4 is cleaned by the cleaning component for easy use next time.

[0033] In some embodiments, such as Figure 1 as well as Figure 4As shown, the surface of the base 5 is provided with several grooves 51, which are located directly below several insertion rods 4. The inner sidewall of the groove 51 is provided with a limiting groove 511. The inner sidewall of the groove 51 is provided with a cleaning component, which includes a first clamping plate 52, a second clamping plate 53 and a spring 521. The first clamping plate 52 is fixed on the inner sidewall of the groove 51. The second clamping plate 53 slides on the inner sidewall of the groove 51, and both ends of the second clamping plate 53 slide on the inner sidewall of the limiting groove 511. Both ends of the spring 521 are fixedly connected to the second clamping plate 53 and the inner sidewall of the groove 51, respectively. The surfaces of the first clamping plate 52 and the second clamping plate 53 are provided with a groove 54 for cleaning the surface of the insertion rod 4.

[0034] Specifically, by setting up a cleaning component, when the insertion rod 4 is inserted close to the base 5, one end of the second clamping plate 53 is pushed away from the first clamping plate 52. The spring 521 undergoes elastic deformation and contracts, causing the second clamping plate 53 to slide on the inner wall of the second groove 51. Since both ends of the second clamping plate 53 slide on the inner wall of the second limiting groove 511, the second limiting groove 53 will limit the sliding of the second clamping plate 53, preventing it from detaching from the second groove 51. After the insertion rod 4 is inserted into the base 5 and... When it extends into the soil, the second clamping plate 53 is released, and under the action of the spring 521, it recovers its elastic deformation, causing the second clamping plate 53 to move towards the side closer to the first clamping plate 52, so that the distance between the two clamping slots 54 becomes smaller, and the surface of the insertion rod 4 is squeezed. When the insertion rod 4 is pulled out of the soil, the surface of the insertion rod 4 is squeezed, and the soil stuck to the surface of the insertion rod 4 is cleaned, completing the self-cleaning process. There is no need to clean the surface of the insertion rod again. It has good performance and high practicality.

[0035] In some embodiments, such as Figure 1 , Figure 4 , Figure 5 as well as Figure 6 As shown, the mounting frame includes a sliding plate 12, which slides on the surface of the support column 11. Several equally spaced sliders 121 are fixed on the inner wall of the sliding plate 12. Several fixing blocks 122 are fixed on the outer side of each slider 121. Several insertion components are threadedly connected to the bottom of the fixing blocks 122. The sliding plate 12 slides on the inner wall of several sliding grooves 111 through the sliders 121. Two opposing fixing blocks 123 are fixed on the outer side of the sliding plate 12. A drive component is fixed at the bottom of the two fixing blocks 123.

[0036] The drive assembly includes a hydraulic rod 13 and a telescopic rod 14. One end of the hydraulic rod 13 and the telescopic rod 14 are respectively fixedly connected to the bottom of two fixed blocks 123, and the other end of the hydraulic rod 13 and the telescopic rod 14 are fixedly connected to the top of the base 5.

[0037] Specifically, the hydraulic rod 13 in the drive assembly plays a height adjustment role. By driving the hydraulic rod 13, the telescopic rod 14 is extended and retracted, which in turn drives the fixed block 123 to adjust its height, thereby adjusting the height of the slide plate 12 and the mounting assembly. This allows the slide plate 12 to slide on the inner sidewall of the slide groove 111 via several sliders 121, and the sliders 121 on the inner sidewall of the slide plate 12 will not disengage from the slide groove 111 when the slide plate 12 slides.

[0038] In some embodiments, such as Figures 1 to 3 As shown, a mounting plate 2 is fixed to the top of the top plate 1. The surface of the mounting plate 2 has a mounting groove 21 for mounting the drive motor 22. A clamping mechanism is provided on the inner wall of the mounting plate 2. The clamping mechanism includes a lead screw 23, two sliding rods 231, two sliding plates 24, and clamping components that slide on the surfaces of the two sliding plates 24 respectively. The lead screw 23 rotates on the inner wall of the mounting plate 2. The two ends of the two sliding rods 231 are fixed to the inner wall of the mounting plate 2, and the lead screw 23 is located between the two sliding rods 231. The sliding plates 24 are threaded to the surface of the lead screw 23 and slide on the surfaces of the two sliding rods 231. Limit grooves 241 are provided on the surfaces of both sliding plates 24. One of the sliding plates 24 has a groove 242 for mounting the geared motor 3. 242 is located on one side of the limiting groove 241. The rotor of the reduction motor 3 passes through the surface of the groove 242 and is fixed with the lead screw 31. The two ends of the lead screw 31 rotate on the inner wall of the limiting groove 241. Two connecting plates 25 slide on the surface of the sliding plate 24. The two ends of the four connecting plates 25 slide on the inner wall of the limiting groove 241. The surfaces of the two connecting plates 25 are threadedly connected to the surfaces of the lead screw 31. Two telescopic plates 251 are fixed to the connecting plates 25 located between the two sliding plates 24. The two ends of the two telescopic plates 251 are fixedly connected to the outer sides of the four connecting plates 25. A clamping plate 252 for limiting the manhole cover is fixed to the bottom of the connecting plate 25. A clamping block 253 is fixed to the bottom of the clamping plate 252. The surface of the clamping plate 252 is also provided with an anti-slip layer 26.

[0039] The unwinding mechanism includes two unwinding components 6, which are respectively fixed to the top of the mounting plate 2. The output ends of the two unwinding components 6 are fixed with ropes 61, and the bottom of each rope 61 is fixed with a mounting block 62.

[0040] Among them, lead screw 1 23 and lead screw 2 31 are both double-acting lead screws;

[0041] Specifically, the unwinding mechanism is used to lift the top of the manhole cover. When in use, the mounting block 62 is vertically inserted into the manhole cover hole. At this time, the mounting block 62 is locked at the bottom of the manhole cover. Driven by the two unwinding components 6, the rope 61 is driven to rise, thereby lifting the manhole cover.

[0042] Furthermore, when the manhole cover has risen under the drive of the unwinding assembly 6, the drive motor 22 is started first. The drive motor 22 drives the lead screw 23 to rotate. Since the sliding plate 24 is threadedly connected to the surface of the lead screw 23, the sliding plate 24 slides on the surface of the two sliding rods 231. Therefore, the rotation of the lead screw 23 will be converted into the linear motion of the sliding plate 24, causing the two sliding plates 24 to move closer or further apart. When the sliding plate 24 moves to the appropriate position, the reduction motor 3 is started. The reduction motor 3 drives the lead screw 31 to rotate. The rotation of the lead screw 31 will drive the connecting plate 25, which is threadedly connected to its surface, to slide within the limiting groove 241. When the connecting plate 25 rotates, it is limited by the limiting groove 241 and will not rotate. It slides within the limiting groove 241. Since the bottom of the connecting plate 25 is fixed with the clamping plate 252 and the clamping block 253, the sliding of the connecting plate 25 will drive the clamping plate 252 and the clamping block 253 to clamp or release the manhole cover. During the clamping process, the presence of the anti-slip layer 26 greatly enhances the friction between the clamping plate 252 and the manhole cover, preventing the manhole cover from sliding or falling off during the lifting process. At the same time, the design of the telescopic plate 251 allows the clamping mechanism to adapt to manhole covers of different sizes, improving the versatility and flexibility of the device. After clamping the manhole cover.

[0043] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0044] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A manhole cover lifting device for municipal construction, characterized by, The utility model provides a well lid limiting device, including top plate (1), the top of top plate (1) is equipped with unwinding mechanism and clamping mechanism for limiting well lid, the bottom of top plate (1) is equipped with four equidistance distribution support column (11), the surface of four support column (11) all slides mounting bracket, the bottom of four support column (11) all is connected with base (5) through threaded column two (55), the bottom of mounting bracket is equipped with four equidistance distribution inserts component, drive component for adjusting inserts component height is equipped between mounting bracket with base (5), the surface of base (5) is equipped with a plurality of recess two (51), a plurality of recess two (51) are located the just below of a plurality of inserts component, The inserts component includes plug rod (4), a plurality of recess two (51) are equipped with cleaning assembly for the surface cleaning of plug rod (4), one end of plug rod (4) is fixed with threaded column one (43), one end of plug rod (4) is connected with the bottom of mounting bracket through threaded column one (43), the other end of plug rod (4) is screw thread (41), plug rod (4) is screwed with the surface of plug (42) through screw thread (41).

2. The manhole cover lifting device for municipal construction according to claim 1, characterized in that, The surface of base (5) is equipped with a plurality of recess two (51), a plurality of recess two (51) are located the just below of a plurality of plug rod (4), the inner side wall of recess two (51) is equipped with limit groove two (511), the inner side wall of recess two (51) is equipped with cleaning assembly, the cleaning includes clamping plate one (52), clamping plate two (53) and spring (521), clamping plate one (52) is fixed on the inner side wall of recess two (51), clamping plate two (53) slides on the inner side wall of recess two (51), and both ends of clamping plate two (53) slide on the inner side wall of limit groove two (511), both ends of spring (521) are fixedly connected with clamping plate two (53) and the inner side wall of recess two (51), and the surface of clamping plate one (52) and clamping plate two (53) are all equipped with clamping groove (54) for the surface cleaning of plug rod (4).

3. The manhole cover lifting device for municipal construction according to claim 2, characterized in that, The surface of four support column (11) all is equipped with a plurality of sliding slot one (111), the bottom of four support column (11) all is equipped with mounting hole (112), one end of threaded column two (55) is threadedly connected with the inner side wall of mounting hole (112).

4. The manhole cover lifting device for municipal construction according to claim 3, characterized in that, The mounting frame comprises a sliding plate one (12) sliding on the surface of the support column (11), the inner side wall of the sliding plate one (12) is fixed with a plurality of sliding blocks (121) distributed at equal intervals, the outer side of each of the plurality of sliding blocks (121) is fixed with a plurality of fixed blocks one (122), a plurality of the insertion assemblies are connected with the bottom threads of the plurality of fixed blocks one (122), the sliding plate one (12) slides on the inner side wall of a plurality of the sliding grooves one (111) through the plurality of sliding blocks (121) respectively, the outer side of the sliding plate one (12) is fixed with two opposite fixed blocks two (123), the bottom of the two fixed blocks two (123) is fixed with a driving assembly.

5. The manhole cover lifting device for municipal construction according to claim 4, characterized in that, The driving assembly comprises a hydraulic rod (13) and a telescopic rod (14), one end of the hydraulic rod (13) and the telescopic rod (14) is fixedly connected with the bottom of the two fixed blocks two (123) respectively, the other end of the hydraulic rod (13) and the telescopic rod (14) is fixedly connected with the top of the base (5).

6. The manhole cover lifting device for municipal construction according to claim 5, characterized in that, The top of the top plate (1) is fixedly connected with a mounting plate (2), the surface of the mounting plate (2) is provided with a mounting groove (21) for mounting a driving motor (22), the inner side wall of the mounting plate (2) is provided with a clamping mechanism, the clamping mechanism comprises a lead screw (23), two sliding rods (231), two sliding plates (24) and clamping assemblies respectively sliding on the surfaces of the two sliding plates (24), the lead screw (23) is rotatable on the inner side wall of the mounting plate (2), the two ends of the two sliding rods (231) are fixedly connected to the inner side wall of the mounting plate (2), and the lead screw (23) is located between the two sliding rods (231), the sliding plates (24) are connected with the surfaces of the lead screw (23) in a threaded manner and slide on the surfaces of the two sliding rods (231), the surfaces of the two sliding plates (24) are both provided with a limiting groove (241), the surface of one of the two sliding plates (24) is provided with a groove (242) for mounting a speed reducer (3), and the groove (242) is located on one side of the limiting groove (241), the rotor of the speed reducer (3) penetrates through the surface of the groove (242) and is fixedly connected with a lead screw (31), the two ends of the lead screw (31) are rotatable on the inner side wall of the limiting groove (241), the surface of the sliding plate (24) is slidingly provided with two connecting plates (25), the two ends of the four connecting plates (25) are slidingly connected to the inner side wall of the limiting groove (241), the surfaces of two of the connecting plates (25) are connected with the surface of the lead screw (31) in a threaded manner, the connecting plates (25) located between the two sliding plates (24) are respectively fixedly connected with two expansion plates (251), the two ends of the two expansion plates (251) are respectively connected with the outer sides of the four connecting plates (25), the bottom of the connecting plate (25) is fixedly connected with a clamping plate (252) for limiting the manhole cover, the bottom of the clamping plate (252) is fixedly connected with a clamping block (253), and the surface of the clamping plate (252) is further provided with an anti-skid layer (26).

7. The manhole cover lifting device for municipal construction according to claim 6, characterized by, The unwinding mechanism comprises two unwinding assemblies (6), the two unwinding assemblies (6) are respectively fixedly connected to the top of the mounting plate (2), the output ends of the two unwinding assemblies (6) are fixedly connected with ropes (61), and the bottoms of the ropes (61) are both fixedly connected with mounting blocks (62).

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