A sewer manhole cover replacement device

Abstract

The present invention discloses a device for replacing a sewer manhole cover, and relates to the technical field of sewer manhole covers; the device improves the problem of high labor intensity when replacing a sewer manhole cover, and the present invention comprises a top plate and side plates arranged on both sides of the top plate, one side of the bottom of the top plate is fixedly connected to a first support column, one end of the first support column is fixedly connected to a first support rotating sleeve, the inner surface of the first support rotating sleeve is rotatably connected to a first rotating rod through a bearing, one end of the first rotating rod is fixedly connected to a first linkage clamping plate, the first linkage clamping plate is used to be connected to the linkage clamping frame, a crank mechanism is arranged at the other end of the first rotating rod, and the bottom of the top plate is connected to a first motor through a lateral moving mechanism; the present invention knocks the manhole cover to loosen the manhole cover through the setting of the crank mechanism, thereby facilitating the opening of the manhole cover, and the manhole cover is opened through the setting of the winding mechanism, and there is no need for manual cover opening operation, thereby saving a certain amount of labor.

Description

Technical Field

[0001] The invention relates to the technical field of sewer manhole covers, in particular to a sewer manhole cover replacement device. Background Art

[0002] Sewers are a type of urban public facility, which refers to pipes for buildings to remove sewage and rainwater, and also refers to underground passages for cities, factories or villages to remove sewage and rainwater. Each sewer opening is equipped with a manhole cover to close the sewer, which is convenient for workers to inspect or dredge the sewer when it is blocked. However, since the manhole covers are laid on the road surface, they are tightly attached to the sewer openings under the rolling of pedestrians and vehicles. Moreover, manhole covers that have not been opened for a long time may rust, and when the road is paved, asphalt may stick to the manhole cover, which may make it difficult to open the manhole cover, making it difficult to replace the manhole cover.

[0003] At present, most of them are opened by force manually. Workers use hammers to knock on the manhole covers to loosen the manhole covers sticky with asphalt or rusty manhole covers. Then they need to use crowbars to pry out the manhole covers. After prying them open, they manually flip the manhole covers to open them, and then disassemble and replace them. The operation is troublesome and requires a lot of labor. Therefore, it is necessary to develop a sewer manhole cover replacement device with low labor intensity when replacing the manhole covers. Summary of the invention

[0004] In order to solve the problem of high labor intensity when replacing manhole covers, the purpose of the present invention is to provide a sewer manhole cover replacement device.

[0005] To solve the above technical problems, the present invention adopts the following technical scheme: it includes a top plate and side plates arranged on both sides of the top plate, the top plate is used to install the moving mechanism, the side plates are used to support the device, one side of the bottom of the top plate is fixedly connected with a first support column, one end of the first support column is fixedly connected with a first support rotating sleeve, the first support column is used to install the first support rotating sleeve, the arrangement of the first support column and the first support rotating sleeve provides a supporting force for the crankshaft mechanism to prevent the first motor from being subjected to a large force and increase the service life of the device, the inner surface of the first support rotating sleeve is rotatably connected with a first rotating rod through a bearing, and one end of the first rotating rod is fixedly connected with a first linkage card The cam is connected to the second end of the second support rod and the second end of the second support rod is connected to the cam by the cam mechanism. One end of the second support column is fixedly connected to a second support rotating sleeve, and the inner surface of the second support rotating sleeve is rotatably connected to a second rotating rod through a bearing, and one end of the second rotating rod is fixedly connected to a second linkage clamping plate adapted to the linkage clamping frame, and a winding mechanism is provided at the other end of the second rotating rod. Through the setting of the crankshaft mechanism, the manhole cover is knocked to loosen the manhole cover, which is convenient for opening the manhole cover. Through the setting of the winding mechanism, the manhole cover is opened, and manual opening operation is not required, which saves a certain amount of labor. The bottom of the top plate is fixedly connected to the first telescopic rod, and the outer surface of the first rotating rod is provided with a first limiting hole adapted to the first telescopic rod. The first telescopic rod is used to insert into the first limiting hole, thereby limiting the first rotating rod to prevent the crank mechanism from shaking; the bottom of the horizontal sliding block is fixedly connected to the second telescopic rod, and the outer surface of the second rotating rod is provided with a second limiting hole adapted to the second telescopic rod. The second telescopic rod is inserted into the second limiting hole, thereby limiting the second rotating rod to prevent the winding mechanism from rotating at will and ensuring the normal use of the device; the outer surface of the side panel is fixedly connected to the third telescopic rod, and one end of the third telescopic rod is rotatably connected to the universal wheel. The third telescopic rod causes the universal wheel to contract, thereby making the side panel in close contact with the ground, thereby ensuring the stability of the device during operation, and the universal wheel facilitates the movement of the device.

[0006] Preferably, the lateral movement mechanism includes a threaded rod, two ends of the threaded rod are rotatably connected to the outer surface of the side plate, one side of the side plate is fixedly connected to a second motor, one end of the output shaft of the second motor is fixedly connected to one end of the threaded rod, the threaded rod is used to drive the threaded sleeve to move, and the second motor provides power for the rotation of the threaded rod, the outer surface of the threaded rod is threadedly connected to a threaded sleeve, the outer surface of the threaded sleeve is fixedly connected to a motor mounting plate, the bottom of the motor mounting plate is fixedly connected to the outer surface of the first motor, the motor mounting plate is used to install the first motor and is also used to connect the limit sliding sleeve, a limit guide rod is fixedly connected between the two side plates, the outer surface of the limit guide rod is sleeved and slidably connected to the limit sliding sleeve, the outer surface of the limit sliding sleeve is fixedly connected to the top of the motor mounting plate, the limit sliding sleeve is used to limit the threaded sleeve to prevent the threaded sleeve from rotating, and the limit guide rod is installed with the limit sliding sleeve.

[0007] Preferably, the crank mechanism includes a rotating crankshaft, one end of the rotating crankshaft is fixedly connected to the other end of the first rotating rod, the outer surface of the rotating crankshaft is rotatably connected to a linkage rod through a rotating sleeve, one end of the linkage rod is rotatably connected to a spring barrel, the inner surface of the spring barrel is fixedly connected to a telescopic spring, the telescopic spring increases the applicability of the device, when the manhole cover is more protruding, the normal rotation of the crankshaft mechanism is ensured to prevent the crankshaft mechanism from getting stuck, and when the manhole cover is more recessed, the gravity ball can be hit on the manhole cover by one end of the telescopic spring. The outer surface of the first supporting rotating sleeve is fixedly connected to a limiting ring through a connecting rod, the inner surface of the limiting ring is slidably connected to the outer surface of the spring barrel, the crankshaft drives the linkage rod to rotate, the linkage rod drives the spring barrel to move along the limiting ring, the spring barrel drives the telescopic spring to move the spring rod, the spring rod reciprocates up and down to drive the gravity ball to repeatedly hit the manhole cover, the vibration makes the manhole cover loosen, and the manhole cover is convenient to open.

[0008] Preferably, the winding mechanism includes a winding drum, one end of which is fixedly connected to the other end of the second rotating rod, a pulling rope is wound around the outer surface of the winding drum, one end of the pulling rope is fixedly connected to a steel hook, the winding drum rotates to make the pulling rope wound around the outer surface of the winding drum, thereby shortening the pulling rope, and the shortening of the pulling rope drives the steel hook to move, and the movement of the steel hook opens the manhole cover, and the pulling rope uses a steel wire rope.

[0009] The present invention uses a crankshaft mechanism to knock the manhole cover to loosen it, which is convenient for opening the manhole cover. The winding mechanism is used to open the manhole cover, and no manual opening operation is required, which saves a certain amount of labor. The lateral moving mechanism is used to enable the first motor to move horizontally. The movement of the first motor pulls the steel hook to open the manhole cover. At the same time, the first motor provides power to the winding mechanism and the crankshaft mechanism respectively, which reduces the use of motors, reduces the manufacturing cost of the device, and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0012] Figure 2 It is a structural schematic diagram of the top plate of the present invention.

[0013] Figure 3 It is a structural schematic diagram of the crankshaft mechanism of the present invention.

[0014] Figure 4 It is a schematic structural diagram of the first rotating rod of the present invention.

[0015] Figure 5 It is a structural schematic diagram of the linkage bracket of the present invention.

[0016] Figure 6 It is a structural schematic diagram of the winding mechanism of the present invention.

[0017] Figure 7 It is a schematic structural diagram of the second rotating rod of the present invention.

[0018] Figure 8 It is a schematic structural diagram of the steel hook of the present invention.

[0019] Fig. 9 It is a structural schematic diagram of the spring barrel of the present invention.

[0020] In the figure: 1, top plate; 2, side plate; 3, first support column; 4, first support rotating sleeve; 5, first rotating rod; 6, first linkage card plate; 7, first motor; 8, linkage card frame; 9, second support column; 10, second support rotating sleeve; 11, second rotating rod; 12, second linkage card plate; 13, first telescopic rod; 14, first limiting hole; 15, horizontal sliding groove; 16, horizontal sliding block; 17, second telescopic rod; 18, second limiting hole; 20, third telescopic rod; 21, Wan 120. Transverse moving wheel; 121. Threaded rod; 122. Second motor; 123. Threaded sleeve; 124. Motor mounting plate; 125. Limiting guide rod; 126. Limiting sleeve; 130. Crank mechanism; 131. Rotating crankshaft; 132. Linking rod; 133. Spring barrel; 134. Telescopic spring; 135. Spring rod; 136. Gravity ball; 137. Limiting ring; 140. Winding mechanism; 141. Winding cylinder; 142. Pulling rope; 143. Steel hook. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figure 1-9As shown, the present invention provides a sewer manhole cover replacement device, including a top plate 1 and side plates 2 arranged on both sides of the top plate 1, the top plate 1 is used to install a lateral movement mechanism 120, and the side plates 2 are used to support the device. A first support column 3 is fixedly connected to one side of the bottom of the top plate 1, and one end of the first support column 3 is fixedly connected to a first support rotating sleeve 4, and the first support column 3 is used to install the first support rotating sleeve 4. The arrangement of the first support column 3 and the first support rotating sleeve 4 provides a supporting force for the crank mechanism 130 to prevent the first motor 7 from being subjected to a large force, thereby increasing the service life of the device. The inner surface of the first support rotating sleeve 4 is rotatably connected to a first rotating rod 5 through a bearing, and one end of the first rotating rod 5 is fixedly connected to a first linkage card plate 6, and the first linkage card plate 6 is used to be connected to a linkage card frame 8. The other end of the first rotating rod 5 is provided with a crank mechanism 130, and the bottom of the top plate 1 is connected to the first motor 7 through the lateral movement mechanism 120, and one end of the output shaft of the first motor 7 is fixedly connected to a The adapted linkage bracket 8 is composed of two clamping plates, which limit the bracket plate and facilitate the linkage bracket 8 to move away from the bracket plate. A transverse sliding groove 15 is provided at the bottom of the top plate 1, and the transverse sliding groove 15 enables the second support column 9 to move laterally with the winding mechanism 140. The inner surface of the transverse sliding groove 15 is slidably connected with a transverse sliding block 16, and the bottom of the transverse sliding block 16 is fixedly connected to the second support column 9, one end of the second support column 9 is fixedly connected to the second support rotating sleeve 10, and the inner surface of the second support rotating sleeve 10 is rotatably connected to the second rotating rod 11 through a bearing. One end of the second rotating rod 11 is fixedly connected to the second linkage bracket 12 adapted to the linkage bracket 8, and the other end of the second rotating rod 11 is provided with a winding mechanism 140. Through the setting of the crankshaft mechanism 130, the manhole cover is knocked to loosen the manhole cover, which is convenient for opening the manhole cover. Through the setting of the winding mechanism 140, the manhole cover is opened, and there is no need to manually open the cover, saving a certain amount of labor.

[0023] The winding mechanism 140 includes a winding drum 141 , one end of which is fixedly connected to the other end of the second rotating rod 11 , a pulling rope 142 is wound around the outer surface of the winding drum 141 , and one end of the pulling rope 142 is fixedly connected to a steel hook 143 .

[0024] By adopting the above technical solution, the winding drum 141 rotates to make the pulling rope 142 wind around the outer surface of the winding drum 141, so that the pulling rope 142 is shortened. The shortening of the pulling rope 142 drives the steel hook 143 to move, and the movement of the steel hook 143 opens the manhole cover. The pulling rope 142 uses a steel wire rope.

[0025] The crank mechanism 130 includes a rotating crankshaft 131, one end of which is fixedly connected to the other end of the first rotating rod 5, the outer surface of the rotating crankshaft 131 is rotatably connected to a linkage rod 132 through a rotating sleeve, one end of the linkage rod 132 is rotatably connected to a spring barrel 133, and the inner surface of the spring barrel 133 is fixedly connected to a telescopic spring 134.

[0026] By adopting the above technical solution, the telescopic spring 134 increases the applicability of the device. When the manhole cover is more protruding, it ensures the normal rotation of the crankshaft mechanism 130 and prevents the crankshaft mechanism 130 from getting stuck. When the manhole cover is more concave, it ensures that the gravity ball 136 can hit the manhole cover.

[0027] One end of the telescopic spring 134 is fixedly connected to a spring rod 135, one end of the spring rod 135 is fixedly connected to a gravity ball 136, the outer surface of the first supporting rotating sleeve 4 is fixedly connected to a limiting ring 137 through a connecting rod, and the inner surface of the limiting ring 137 is slidably connected to the outer surface of the spring barrel 133.

[0028] By adopting the above technical solution, the crankshaft 131 is rotated to drive the linkage rod 132 to rotate, the linkage rod 132 drives the spring barrel 133 to move along the limit ring 137, the spring barrel 133 drives the telescopic spring 134 to move the spring rod 135, and the spring rod 135 reciprocates up and down to drive the gravity ball 136 to repeatedly hit the manhole cover, and the vibration loosens the manhole cover, making it easier to open the manhole cover.

[0029] The lateral movement mechanism 120 includes a threaded rod 121 , both ends of which are rotatably connected to the outer surface of the side plate 2 , a second motor 122 is fixedly connected to one side of one side plate 2 , and one end of the output shaft of the second motor 122 is fixedly connected to one end of the threaded rod 121 .

[0030] By adopting the above technical solution, the threaded rod 121 is used to drive the threaded sleeve 123 to move, and the second motor 122 provides power for the threaded rod 121 to rotate.

[0031] The outer surface of the threaded rod 121 is threadedly connected with a threaded sleeve 123 , the outer surface of the threaded sleeve 123 is fixedly connected with a motor mounting plate 124 , and the bottom of the motor mounting plate 124 is fixedly connected to the outer surface of the first motor 7 .

[0032] By adopting the above technical solution, the motor mounting plate 124 is used to mount the first motor 7 and is also used to connect the limiting sliding sleeve 126 .

[0033] A limiting guide rod 125 is fixedly connected between the two side plates 2 . A limiting sliding sleeve 126 is sleeved and slidably connected to the outer surface of the limiting guide rod 125 . The outer surface of the limiting sliding sleeve 126 is fixedly connected to the top of the motor mounting plate 124 .

[0034] By adopting the above technical solution, the limiting sliding sleeve 126 is used to limit the threaded sleeve 123 to prevent the threaded sleeve 123 from rotating, and the limiting guide rod 125 is installed with the limiting sliding sleeve 126 .

[0035] A first telescopic rod 13 is fixedly connected to the bottom of the top plate 1 , and a first limiting hole 14 matched with the first telescopic rod 13 is formed on the outer surface of the first rotating rod 5 .

[0036] By adopting the above technical solution, the first telescopic rod 13 is used to be inserted into the first limiting hole 14 , so as to limit the first rotating rod 5 and prevent the crank mechanism 130 from shaking.

[0037] A second telescopic rod 17 is fixedly connected to the bottom of the transverse sliding block 16 , and a second limiting hole 18 matched with the second telescopic rod 17 is formed on the outer surface of the second rotating rod 11 .

[0038] By adopting the above technical solution, the second telescopic rod 17 is inserted into the second limiting hole 18, thereby limiting the second rotating rod 11, preventing the winding mechanism 140 from rotating randomly, and ensuring the normal use of the device.

[0039] A third telescopic rod 20 is fixedly connected to the outer surface of the side plate 2 , and one end of the third telescopic rod 20 is rotatably connected to a universal wheel 21 .

[0040] By adopting the above technical solution, the third telescopic rod 20 causes the universal wheel 21 to shrink, so that the side panel 2 is in close contact with the ground, ensuring the stability of the device during operation, and the universal wheel 21 facilitates the movement of the device.

[0041] Working principle: Move the device to the top of the manhole cover, start the third telescopic rod 20 to shrink the third telescopic rod 20, shrink the third telescopic rod 20 to make the device descend, so that the bottom of the side plate 2 is in close contact with the ground to ensure the stability of the device, start the first telescopic rod 13 away from the first limit hole 14, start the first motor 7 to drive the linkage bracket 8 to rotate the first linkage card plate 6, the first linkage card plate 6 drives the first rotating rod 5 to rotate the rotating crankshaft 131, the rotating crankshaft 131 drives the linkage rod 132 to rotate and rise, and the linkage rod 132 drives the spring barrel 133 along The limiting ring 137 rises, the spring barrel 133 drives the telescopic spring 134 to make the spring rod 135 rise, and the spring rod 135 drives the gravity ball 136 to rise, and similarly makes the gravity ball 136 fall, and the gravity ball 136 falls and knocks the manhole cover, so that the manhole cover is loosened. After the knocking is completed, the first telescopic rod 13 is started to insert the first telescopic rod 13 into the first limiting hole 14, so as to limit the first rotating rod 5, and the second motor 122 is started to drive the threaded rod 121 to rotate. Due to the limitation of the lateral moving mechanism 120, the threaded rod 121 rotates to move the threaded sleeve 123. The threaded sleeve 123 drives the motor mounting plate 124 to move the first motor 7, and the first motor 7 drives the linkage bracket 8 away from the first linkage bracket 6. The first motor 7 moves to drive the linkage bracket 8 to match the second linkage bracket 12, and the second telescopic rod 17 is started to move away from the second limiting hole 18, thereby releasing the limit on the second rotating rod 11, pulling the steel hook 143 into the maintenance hole of the manhole cover, and starting the first motor 7 drives the linkage bracket 8 to rotate the second linkage bracket 12, and the second linkage bracket 12 drives the winding drum 141 to make the pulling rope 142 wind around the winding drum 1 41, the pulling rope 142 is wound and shortened to drive the steel hook 143 to open the manhole cover, and similarly, the second motor 122 is started to move the first motor 7, and the first motor 7 is controlled to make the linkage bracket 8 and the second linkage clamping plate 12 non-horizontally contact, the first motor 7 drives the linkage bracket 8 to move the second linkage clamping plate 12, the second linkage clamping plate 12 drives the second rotating rod 11 to move the winding drum 141, the winding drum 141 drives the pulling rope 142 to move the steel hook 143, and the steel hook 143 drives the manhole cover to flip over, completing the opening operation, and the workers disassemble and replace the manhole cover.

[0042] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A sewer manhole cover replacement device, comprising a top plate (1) and side plates (2) arranged on both sides of the top plate (1), characterized in that: A first support column (3) is fixedly connected to one side of the bottom of the top plate (1); one end of the first support column (3) is fixedly connected to a first support rotating sleeve (4); the inner surface of the first support rotating sleeve (4) is rotatably connected to a first rotating rod (5) via a bearing; one end of the first rotating rod (5) is fixedly connected to a first linkage clamping plate (6); the other end of the first rotating rod (5) is provided with a crank mechanism (130); the bottom of the top plate (1) is connected to a first motor (7) via a lateral movement mechanism (120); one end of the output shaft of the first motor (7) is fixedly connected to a linkage clamping frame (130) adapted to the first linkage clamping plate (6); 8), a transverse sliding groove (15) is provided at the bottom of the top plate (1), a transverse sliding block (16) is slidably connected to the inner surface of the transverse sliding groove (15), a second support column (9) is fixedly connected to the bottom of the transverse sliding block (16), one end of the second support column (9) is fixedly connected to a second support rotating sleeve (10), the inner surface of the second support rotating sleeve (10) is rotatably connected to a second rotating rod (11) through a bearing, one end of the second rotating rod (11) is fixedly connected to a second linkage card plate (12) adapted to the linkage card frame (8), and the other end of the second rotating rod (11) is provided with a winding mechanism (140); The winding mechanism (140) comprises a winding drum (141), one end of which is fixedly connected to the other end of the second rotating rod (11), a pulling rope (142) is wound around the outer surface of the winding drum (141), and one end of the pulling rope (142) is fixedly connected to a steel hook (143); The crank mechanism (130) comprises a rotating crankshaft (131), one end of the rotating crankshaft (131) is fixedly connected to the other end of the first rotating rod (5), the outer surface of the rotating crankshaft (131) is rotatably connected to a linkage rod (132) via a rotating sleeve, one end of the linkage rod (132) is rotatably connected to a spring barrel (133), and the inner surface of the spring barrel (133) is fixedly connected to a telescopic spring (134); The sewer manhole cover replacement device is moved to the top of the manhole cover, the third telescopic rod (20) is started to shrink the third telescopic rod (20), and the device is lowered by shrinking the third telescopic rod (20), so that the bottom of the side plate (2) is in close contact with the ground to ensure the stability of the device, the first telescopic rod (13) is started to move away from the first limit hole (14), the first motor (7) is started to drive the linkage bracket (8) to rotate the first linkage bracket (6), the first linkage bracket (6) drives the first rotating rod (5) to rotate the rotating crankshaft (131), the rotating crankshaft (131) drives the linkage rod (132) to rotate and rise, and the linkage rod (132) drives the spring barrel (133) along the As the limiting ring (137) rises, the spring barrel (133) drives the telescopic spring (134) to make the spring rod (135) rise, and the spring rod (135) drives the gravity ball (136) to rise, and similarly makes the gravity ball (136) fall, and the gravity ball (136) falls and knocks the manhole cover, thereby loosening the manhole cover. After the knocking is completed, the first telescopic rod (13) is started to insert the first telescopic rod (13) into the first limiting hole (14), thereby limiting the first rotating rod (5), and the second motor (122) is started to drive the threaded rod (121) to rotate. Due to the limiting of the lateral moving mechanism (120), the threaded rod (121) rotates to move the threaded sleeve (123), and the threaded rod (121) moves. The threaded sleeve (123) drives the motor mounting plate (124) to move the first motor (7), and the first motor (7) drives the linkage bracket (8) away from the first linkage bracket (6). The first motor (7) moves and drives the linkage bracket (8) to match the second linkage bracket (12), and the second telescopic rod (17) is started to move away from the second limiting hole (18), thereby releasing the limiting of the second rotating rod (11), pulling the steel hook (143) into the maintenance hole of the manhole cover, and starting the first motor (7) to drive the linkage bracket (8) to rotate the second linkage bracket (12), and the second linkage bracket (12) drives the winding drum (141) to make the pulling rope (142) wind around the winding drum. (141), the pulling rope (142) is wound and shortened to drive the steel hook (143) to open the manhole cover. Similarly, the second motor (122) is started to move the first motor (7), and the first motor (7) is controlled to make the linkage bracket (8) and the second linkage bracket (12) non-horizontally contact. The first motor (7) drives the linkage bracket (8) to move the second linkage bracket (12), and the second linkage bracket (12) drives the second rotating rod (11) to move the winding drum (141). The winding drum (141) drives the pulling rope (142) to move the steel hook (143), and the steel hook (143) drives the manhole cover to flip over, completing the opening operation, and the worker disassembles and replaces the manhole cover.

2. A sewer manhole cover replacement device as claimed in claim 1, characterized in that: One end of the telescopic spring (134) is fixedly connected to a spring rod (135), one end of the spring rod (135) is fixedly connected to a gravity ball (136), the outer surface of the first supporting rotating sleeve (4) is fixedly connected to a limiting ring (137) via a connecting rod, and the inner surface of the limiting ring (137) is slidably connected to the outer surface of the spring barrel (133).

3. A sewer manhole cover replacement device as claimed in claim 1, characterized in that: The lateral movement mechanism (120) comprises a threaded rod (121), both ends of which are rotatably connected to the outer surface of the side plate (2); a second motor (122) is fixedly connected to one side of the side plate (2), and one end of the output shaft of the second motor (122) is fixedly connected to one end of the threaded rod (121).

4. A sewer manhole cover replacement device as claimed in claim 3, characterized in that: The outer surface of the threaded rod (121) is threadedly connected to a threaded sleeve (123), the outer surface of the threaded sleeve (123) is fixedly connected to a motor mounting plate (124), and the bottom of the motor mounting plate (124) is fixedly connected to the outer surface of the first motor (7).

5. A sewer manhole cover replacement device as claimed in claim 4, characterized in that: A limiting guide rod (125) is fixedly connected between the two side plates (2); a limiting sliding sleeve (126) is sleeved on the outer surface of the limiting guide rod (125) and slidably connected thereto; and an outer surface of the limiting sliding sleeve (126) is fixedly connected to the top of the motor mounting plate (124).

6. A sewer manhole cover replacement device as claimed in claim 1, characterized in that: A first telescopic rod (13) is fixedly connected to the bottom of the top plate (1), and a first limiting hole (14) adapted to the first telescopic rod (13) is provided on the outer surface of the first rotating rod (5).

7. A sewer manhole cover replacement device as claimed in claim 1, characterized in that: A second telescopic rod (17) is fixedly connected to the bottom of the transverse sliding block (16), and a second limiting hole (18) adapted to the second telescopic rod (17) is provided on the outer surface of the second rotating rod (11).

8. A sewer manhole cover replacement device as claimed in claim 1, characterized in that: A third telescopic rod (20) is fixedly connected to the outer surface of the side plate (2), and one end of the third telescopic rod (20) is rotatably connected to a universal wheel (21).

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