Well lid lifting device and well lid lifting method

Abstract

The invention belongs to the technical field of road surface well lids, and particularly relates to a well lid lifting device which comprises a well ring, a base and a well lid. A well lid lifting method comprises the following steps that S1, when accumulated water on the road surface is increased, the accumulated water enters a trigger opening, a sliding plate is firstly extruded to move, a trigger plate is firstly in contact with a second switch, the second switch is pressed, a motor is powered on to work, and the motor drives a disc to do circular motion in an oval ring. When accumulated water appears on the road surface, the motor works to clean the filter screen and the water passing opening, the situation that the accumulated water cannot be discharged in time due to blockage of the filter screen and the water passing opening is avoided, when the accumulated water on the road surface continues to increase, the electric hydraulic jack is triggered to work to jack up the well lid, and the well lid is not directly jacked up when the accumulated water appears; the factor that accumulated water cannot be discharged due to the fact that the filter screen and the water passing opening are blocked is removed firstly, the well lid is jacked up when the accumulated water is too much, and safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of road manhole covers, and in particular to a manhole cover lifting device and a manhole cover lifting method. Background Art

[0002] A manhole cover is a facility used on roads, sidewalks or other ground coverings, usually used to cover the entrance of underground pipes, equipment or other facilities, usually made of metal, concrete or composite materials.

[0003] Road manhole covers generally have permeable holes on their surface, which can block dirt and impurities while allowing road water to pass through and flow into the sewer. However, when heavy rain occurs, the road water will increase sharply, and the manhole covers cannot allow the accumulated water to pass through quickly, which will cause an increase in road water, which is not conducive to drainage and flood control in the city during the rainy season.

[0004] In order to solve the above problems, we propose a manhole cover lifting device and a manhole cover lifting method. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the background technology and to propose a manhole cover lifting device and a manhole cover lifting method.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a manhole cover lifting device, comprising a manhole ring, a base and a manhole cover, the base is fixedly sleeved on the upper outer wall of the manhole ring, the manhole cover is rotatably connected to the inner wall of the manhole ring, a water outlet is provided on the manhole cover, a trigger outlet is provided on the inner wall of the water outlet, a slide plate is slidably arranged in the trigger outlet, a reset spring is fixedly connected between the slide plate and the inner wall of the trigger outlet, a trigger plate is also fixedly connected to the outer wall of the slide plate, a switch 1 and a switch 2 are fixed to the inner bottom wall of the trigger outlet, and the distance between the switch 1 and the water outlet is greater than the distance between the switch 2 and the water outlet;

[0007] An inclined filter is fixedly connected inside the well ring, a fixed plate located at the lower side wall of the filter is fixedly connected on the inner wall of the well ring, a placement box is fixedly connected to the upper side wall of the fixed plate, an electric hydraulic jack is placed inside the placement box, a driving end of the electric hydraulic jack passes through the upper side wall of the placement box and the filter, and the electric hydraulic jack is connected to switch 1 and the mains via wires.

[0008] In the above-mentioned manhole cover lifting device, the outer wall of the manhole ring is fixedly connected to a support plate, the upper side wall of the support plate is fixedly connected to a motor, the driving end of the motor is fixedly connected to a disc, the driving end of the motor is fixed to the edge of the disc, the outer wall of the manhole ring is provided with a through opening located outside the end of the filter screen, the outer wall of the manhole ring is fixedly connected to a guide plate located outside the through opening, an impact rod is slidably inserted on the guide plate, the end of the impact rod is fixedly connected to an elliptical ring sleeved on the outside of the disc, the elliptical ring is moved back and forth left and right by rotating the disc to squeeze it, and the motor is connected to switch 2 and the mains power through a wire.

[0009] In the above-mentioned manhole cover lifting device, the upper side wall of the filter is fixedly connected to a guide rod, the upper end sliding sleeve of the guide rod is provided with a lifting rod, the outer wall of one end of the lifting rod located in the manhole ring is fixedly connected to a mounting plate, the upper side wall of the mounting plate is fixedly connected to a plurality of conical top rods made of silicone located on the lower side of the water outlet, the other end of the lifting rod passes through the inner wall of the manhole ring and extends to its outside, an opening is provided at the connection between the manhole ring and the lifting rod, the outer wall of the impact rod is fixedly connected to a trapezoidal plate, and the end of the lifting rod located outside the manhole ring is in contact with the inclined surface of the trapezoidal plate.

[0010] In the above-mentioned manhole cover lifting device, a collecting trough is fixedly connected to the outer wall of the manhole ring, a feed port is provided on the outer wall of the collecting trough, a discharge port located at the lowest point of the filter is provided on the outer wall of the manhole ring, the discharge port is arranged opposite to the feed port, a collecting box is slidably arranged in the collecting trough, a feed inlet arranged opposite to the feed port is provided on the outer wall of the collecting box, and evenly distributed water permeable holes are provided on the lower side walls of the collecting trough and the collecting box.

[0011] In the above-mentioned manhole cover lifting device, an extrusion plate is slidably arranged in the collection box, and a moving rod is fixedly connected to the upper side wall of the extrusion plate. The upper end of the moving rod passes through the upper side wall of the collection box and extends to the outside of the collection box. A telescopic spring is sleeved on the outer wall of the moving rod, and the two ends of the telescopic spring are respectively fixedly connected to the upper side wall of the collection box and the outer wall of the moving rod. A special-shaped opening is opened on the base, and a moving plate matching the special-shaped opening is slidably arranged in the special-shaped opening, the upper end of the moving rod is fixedly connected to the lower side wall of the moving plate, and the upper end of the moving plate is fixedly connected to an arc plate.

[0012] In the above-mentioned manhole cover lifting device, the diameter of the disc is greater than the minor axis length of the elliptical ring.

[0013] In the above-mentioned manhole cover lifting device, both switch 1 and switch 2 are delayed reset switches.

[0014] A method for lifting a manhole cover comprises the following steps:

[0015] S1, when the amount of water accumulated on the road increases, the accumulated water enters the trigger port, first squeezes the slide plate to move, so that the trigger plate contacts the second switch first, and the second switch is pressed, the motor is powered on, and the motor drives the disc to move in a circle in the elliptical ring, pushing the elliptical ring and the impact rod to move back and forth, and the impact rod continuously hits the filter screen, causing the filter screen to vibrate, so that the impurities on the surface of the filter screen slide down under the vibration and the scouring of the water body falling into the well circle, and are discharged from the discharge port to the collection tank;

[0016] S2, when the elliptical ring and the impact rod move to the right, the height of the inclined surface contacted by the end of the lifting rod increases continuously, thereby pushing the lifting rod upward, so that the conical push rod moves into the water outlet. When the elliptical ring and the impact rod move to the left, the lifting rod moves downward. The conical push rod moves in the water outlet through the up and down movement of the lifting rod, and the impurities blocking the water outlet are pounded, so that the impurities are discharged smoothly.

[0017] S3, after cleaning the filter and the water inlet, when the water on the road still increases sharply, the accumulated water continues to push the slide plate to slide, and the switch 1 is pressed. At this time, the electric hydraulic jack is energized to start working. The driving end of the electric hydraulic jack extends upward to lift the manhole cover. At this time, the accumulated water is directly discharged into the sewer.

[0018] Compared with the existing technology, the advantages of this manhole cover lifting device are:

[0019] 1. Set switch 2. When the water on the road increases initially, the water extrusion slide plate moves to press switch 2, so that the motor is powered on and starts working. The motor drives the disc to move in a circular motion in the elliptical ring, pushing the elliptical ring and the impact rod to move back and forth. The impact rod continuously hits the filter screen, causing the filter screen to vibrate, so that the impurities on the surface of the filter screen slide down under the vibration and the scouring of the water body in the well circle, and are discharged from the discharge port to the collection tank, so as to avoid the accumulation of impurities on the surface of the filter screen affecting the discharge of water on the road;

[0020] 2. When the elliptical ring and the impact rod move back and forth left and right, when the elliptical ring and the impact rod move to the right, the height of the inclined plane contacted by the end of the lifting rod increases continuously, thereby pushing up the lifting rod, so that the conical push rod moves into the water outlet. When the elliptical ring and the impact rod move to the left, the lifting rod moves downward. The conical push rod moves in the water outlet through the up and down movement of the lifting rod, and the impurities blocked in the water outlet are stirred, so that the impurities are discharged smoothly, avoiding the problem that the accumulated water in the water outlet cannot be discharged in time due to the blockage of impurities;

[0021] 3. Set switch 1. When the accumulated water continues to increase after cleaning the filter and the water outlet, the accumulated water continues to push the slide plate to slide, and the switch 1 is pressed. At this time, the electric hydraulic jack is powered on to start working. The driving end of the electric hydraulic jack extends upward to lift the manhole cover. At this time, the accumulated water is directly discharged into the sewer;

[0022] 4. Set up a collection box. When the accumulated water enters the well circle, it is filtered through the filter screen. The impurities and dirt on the filter screen slide down along its surface, are discharged through the discharge port, enter the feed port through the feed port, and then fall into the collection box for collection. When pedestrians or vehicles walk on the curved plate, the curved plate will be squeezed to move downward, so that the squeezing plate moves downward in the collection box to squeeze the impurities and dirt. On the one hand, it can squeeze out the impurities in time, and on the other hand, it can reduce the area occupied by the impurities and dirt.

[0023] The present invention can first clean the filter screen and the water outlet through the operation of the motor when water accumulates on the road surface, so as to avoid the failure to discharge the accumulated water in time due to the blockage of the filter screen and the water outlet. When the water accumulates on the road surface, the electric hydraulic jack is triggered to work and lift the manhole cover, so as to achieve the goal that the manhole cover is not directly lifted when water accumulates, and the factor that the accumulated water cannot be discharged due to the blockage of the filter screen and the water outlet is first removed. When there is too much accumulated water, the manhole cover is lifted up, thereby increasing safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of a manhole cover lifting device proposed by the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of a manhole cover lifting device proposed by the present invention when the base is removed;

[0026] Figure 3 A schematic diagram of the structure of a manhole ring when the manhole cover is rotated in a manhole cover lifting device proposed by the present invention;

[0027] Figure 4 A side view of a manhole ring in a manhole cover lifting device proposed by the present invention;

[0028] Figure 5 A schematic diagram of the structure of a manhole cover lifting device proposed by the present invention when the manhole ring, manhole cover and base are removed;

[0029] Figure 6 A schematic structural diagram of a transverse cross section of a manhole cover in a manhole cover lifting device proposed by the present invention;

[0030] Figure 7 for Figure 6 A magnified view of the structure of part A;

[0031] Figure 8 A schematic diagram of the structure of a collecting tank in a manhole cover lifting device proposed by the present invention;

[0032] Fig. 9 This is a schematic structural diagram of the connection between an extrusion plate and a moving rod in a manhole cover lifting device proposed by the present invention.

[0033] In the figure: 1 well ring, 2 base, 3 well cover, 4 filter, 5 water outlet, 6 trigger port, 7 slide plate, 8 return spring, 9 trigger plate, 10 switch one, 11 switch two, 12 support plate, 13 motor, 14 disc, 15 elliptical ring, 16 through port, 17 guide plate, 18 impact rod, 19 guide rod, 20 trapezoidal plate, 21 lifting rod, 22 mounting plate, 23 conical top rod, 24 opening, 25 collecting trough, 26 special-shaped port, 27 moving plate, 28 arc plate, 29 collecting box, 30 telescopic spring, 31 moving rod, 32 feeding port, 33 extrusion plate, 34 fixed plate, 35 placement box. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] Reference Figure 1-Figure 9 A manhole cover lifting device comprises a manhole ring 1, a base 2 and a manhole cover 3. The base 2 is fixedly sleeved on the upper outer wall of the manhole ring 1, and the manhole cover 3 is rotatably connected to the inner wall of the manhole ring 1. A water inlet 5 is opened on the manhole cover 3, and a trigger port 6 is opened on the inner wall of the water inlet 5. A slide plate 7 is slidably arranged in the trigger port 6, and a reset spring 8 is fixedly connected between the slide plate 7 and the inner wall of the trigger port 6. A trigger plate 9 is also fixedly connected to the outer wall of the slide plate 7. A switch 10 and a switch 2 11 are fixed to the inner bottom wall of the trigger port 6. The distance between the switch 10 and the water inlet 5 is greater than the distance between the switch 2 11 and the water inlet 5. When heavy rain occurs, the water on the road surface increases sharply, the water inlet 5 cannot discharge the water in time, and part of the water enters the trigger port 6 to push the slide plate 7 to move. The trigger plate 9 first contacts the switch 2 11, presses the switch 2 11, and energizes the motor 13 to start working.

[0036] Under normal conditions, the slide plate 7 is located at the end of the trigger port 6, and impurities will not enter the trigger port 6. When the slide plate 7 moves, accumulated water and some impurities enter the trigger port 6. When the accumulated water is drained or the manhole cover 3 is flipped up, the elastic force of the reset spring 8 moves left and right, and the slide plate 7 returns to its original position, which can push out some impurities in the trigger port 6 and avoid blockage of the trigger port 6.

[0037] The upper and lower side walls of the slide plate 7 are in contact with the inner top wall and inner bottom wall of the trigger port 6 respectively, so the slide plate 7 can only move left and right, and the accumulated water will not enter the right side of the slide plate 7.

[0038] The outer wall of the well ring 1 is fixedly connected with a support plate 12, the upper side wall of the support plate 12 is fixedly connected with a motor 13, the driving end of the motor 13 is fixedly connected with a disc 14, the driving end of the motor 13 is fixed to the edge of the disc 14, the outer wall of the well ring 1 is provided with a through hole 16 located outside the end of the filter screen 4, the outer wall of the well ring 1 is fixedly connected with a guide plate 17 located outside the through hole 16, a striking rod 18 is slidably inserted on the guide plate 17, the end of the striking rod 18 is fixedly connected with an elliptical ring 15 sleeved on the outside of the disc 14, the diameter of the disc 14 is greater than the minor axis length of the elliptical ring 15, and the elliptical ring 15 is moved back and forth by rotating the disc 14 and squeezing it, and the motor 13 is connected to the switch 2 11 and the mains through a wire. The motor 13 drives the disc 14 to rotate in the elliptical ring 15. Since the diameter of the disc 14 is greater than the minor axis distance of the elliptical ring 15, when the disc 14 rotates from left to right, it will push the elliptical ring 15 and the impact rod 18 to move to the right. Similarly, when the disc 14 rotates from right to left, it will push the elliptical ring 15 and the impact rod 18 to rotate to the left. The impact rod 18 continuously impacts the filter screen 4 through the left and right back and forth movement of the elliptical ring 15 and the impact rod 18, so that the filter screen 4 generates a certain vibration, so that the impurities on the surface of the filter screen 4 slide downward under the vibration and the scouring of the water body falling into the well ring 1, and are discharged from the discharge port to the collection tank 25, thereby avoiding the clogging of the filter screen 4 caused by excessive impurities on the surface of the filter screen 4.

[0039] The upper side wall of the filter screen 4 is fixedly connected with a guide rod 19, and the upper end sliding sleeve of the guide rod 19 is provided with a lifting rod 21, and the outer wall of one end of the lifting rod 21 located in the well ring 1 is fixedly connected with a mounting plate 22, and the upper side wall of the mounting plate 22 is fixedly connected with a plurality of conical top rods 23 made of silicone located at the lower side of the water outlet 5, and the other end of the lifting rod 21 penetrates the inner wall of the well ring 1 and extends to the outside thereof, and an opening 24 is provided at the connection between the well ring 1 and the lifting rod 21, and the outer wall of the impact rod 18 is fixedly connected with a trapezoidal plate 20, and the lifting rod 21 is located outside the well ring 1 One end of the lifting rod 21 contacts the inclined surface of the trapezoidal plate 20. When the elliptical ring 15 and the impact rod 18 move to the right, the height of the inclined surface contacted by the end of the lifting rod 21 increases continuously, thereby lifting the lifting rod 21 upward, so that the conical top rod 23 moves into the water outlet 5. When the elliptical ring 15 and the impact rod 18 move to the left, the lifting rod 21 moves downward. The conical top rod 23 is moved in the water outlet 5 by the up and down movement of the lifting rod 21, and the impurities blocked in the water outlet 5 are stirred, so as to avoid the accumulation of impurities in the water outlet 5 affecting the flow of accumulated water into the sewer.

[0040] An inclined filter screen 4 is fixedly connected inside the well ring 1, a fixed plate 34 located on the lower side wall of the filter screen 4 is fixedly connected on the inner wall of the well ring 1, a placement box 35 is fixedly connected to the upper side wall of the fixed plate 34, an electric hydraulic jack is placed in the placement box 35, a driving end of the electric hydraulic jack passes through the upper side wall of the placement box 35 and the filter screen 4, the electric hydraulic jack is connected to a switch 10 and the mains through a wire, and both switch 10 and switch 2 11 use a delayed reset switch. After cleaning the filter screen 4 and the water inlet 5, the accumulated water still cannot be discharged in time, and the accumulated water in the trigger port 6 continues to increase, indicating that the rainfall is heavy. At this time, the accumulated water continues to push the slide plate 7 to slide, and the switch 10 is pressed. At this time, the electric hydraulic jack is energized to start working, and the driving end of the electric hydraulic jack extends upward to lift the well cover 3 upward. At this time, the accumulated water is directly discharged into the sewer.

[0041] A collecting trough 25 is fixedly connected to the outer wall of the well ring 1, and a feed port 32 is provided on the outer wall of the collecting trough 25. A discharge port located at the lowest point of the filter screen 4 is provided on the outer wall of the well ring 1, and the discharge port is arranged opposite to the feed port 32. A collecting box 29 is slidably arranged in the collecting trough 25, and an inlet port arranged opposite to the feed port 32 is provided on the outer wall of the collecting box 29. The lower side walls of the collecting trough 25 and the collecting box 29 are both provided with evenly distributed water-permeable holes. An extrusion plate 33 is slidably arranged in the collecting box 29, and a moving rod 31 is fixedly connected to the upper side wall of the extrusion plate 33. The upper end of the moving rod 31 passes through the upper side wall of the collecting box 29 and extends to the outside of the collecting box 29. A telescopic spring 30 is sleeved on the outer wall of the moving rod 31, and the two ends of the telescopic spring 30 are respectively connected to the upper side wall of the collecting box 29 and the moving rod 31. The outer wall of the rod 31 is fixedly connected, and a special-shaped opening 26 is opened on the base 2. A movable plate 27 matching the special-shaped opening 26 is slidably arranged in the special-shaped opening 26. The upper end of the movable rod 31 is fixedly connected to the lower side wall of the movable plate 27, and the upper end of the movable plate 27 is fixedly connected to the arc plate 28. The accumulated water enters the well ring 1 and is filtered through the filter screen 4. The impurities and dirt on the filter screen 4 slide down along its surface and are discharged through the discharge port. They enter the feed port through the feed port 32 and then fall into the collection box 29 for collection. When pedestrians or vehicles walk over the arc plate 28 on the road, the arc plate 28 will be squeezed to move downward, so that the squeezing plate 33 moves downward in the collection box 29 to squeeze the impurities and dirt. On the one hand, they can be squeezed out in time, and on the other hand, the area occupied by the impurities and dirt can be reduced.

[0042] Switch 1 10 and switch 2 11 use delayed reset switches, which can automatically disconnect after the set time is reached to cut off the power of the motor 13 and the electric hydraulic jack.

[0043] Furthermore, in order to increase the warning effect, a warning light can be fixedly embedded on the surface of the manhole cover 3, and the warning light is connected to a switch 10. When the manhole cover 3 is lifted due to excessive water accumulation, the warning light will light up synchronously to achieve a warning effect, alerting passers-by and vehicles. At the same time, when the manhole cover 3 is opened, the accumulated water on the road quickly flows into the well ring 1, and the state of the manhole cover 3 when it is flipped up can be easily observed by pedestrians and vehicles.

[0044] A method for lifting a manhole cover comprises the following steps:

[0045] S1, when the water on the road increases, the accumulated water enters the trigger port 6, first squeezes the slide plate 7 to move, so that the trigger plate 9 first contacts the switch 11, and the switch 11 is pressed, the motor 13 is powered on, and the motor 13 drives the disc 14 to perform a circular motion in the elliptical ring 15, pushing the elliptical ring 15 and the impact rod 18 to reciprocate left and right, and the impact rod 18 continuously hits the filter screen 4, causing the filter screen 4 to vibrate, so that the impurities on the surface of the filter screen 4 slide downward under the vibration and the scouring of the water body falling into the well ring 1, and are discharged from the discharge port to the collection tank 25;

[0046] S2, when the elliptical ring 15 and the impact rod 18 move to the right, the height of the inclined surface contacted by the end of the lifting rod 21 increases continuously, thereby pushing up the lifting rod 21, so that the conical push rod 23 moves into the water outlet 5. When the elliptical ring 15 and the impact rod 18 move to the left, the lifting rod 21 moves downward. The conical push rod 23 moves in the water outlet 5 through the up and down movement of the lifting rod 21, and the impurities blocking the water outlet 5 are pounded, so that the impurities are discharged smoothly;

[0047] S3, after cleaning the filter screen 4 and the water inlet 5, when the water on the road still increases sharply, the accumulated water continues to push the slide plate 7 to slide, and the switch 10 is pressed. At this time, the electric hydraulic jack is energized to start working, and the driving end of the electric hydraulic jack extends upward to lift the manhole cover 3. At this time, the accumulated water is directly discharged into the sewer.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A manhole cover lifting device, comprising a manhole ring (1), a base (2) and a manhole cover (3), characterized in that: The base (2) is fixedly sleeved on the upper outer wall of the well ring (1); the well cover (3) is rotatably connected to the inner wall of the well ring (1); a water outlet (5) is provided on the well cover (3); a trigger port (6) is provided on the inner wall of the water outlet (5); a slide plate (7) is slidably arranged in the trigger port (6); a return spring (8) is fixedly connected between the slide plate (7) and the inner wall of the trigger port (6); a trigger plate (9) is also fixedly connected to the outer wall of the slide plate (7); a switch 1 (10) and a switch 2 (11) are fixedly provided on the inner bottom wall of the trigger port (6); the distance between the switch 1 (10) and the water outlet (5) is greater than the distance between the switch 2 (11) and the water outlet (5); A tilted filter screen (4) is fixedly connected inside the well ring (1), a fixed plate (34) located at the lower side wall of the filter screen (4) is fixedly connected to the inner wall of the well ring (1), a placement box (35) is fixedly connected to the upper side wall of the fixed plate (34), an electric hydraulic jack is placed inside the placement box (35), a driving end of the electric hydraulic jack penetrates the upper side wall of the placement box (35) and the filter screen (4), and the electric hydraulic jack is connected to a switch 1 (10) and a mains electricity supply through a wire.

2. A manhole cover lifting device according to claim 1, characterized in that: The outer wall of the well ring (1) is fixedly connected to a support plate (12), the upper side wall of the support plate (12) is fixedly connected to a motor (13), the driving end of the motor (13) is fixedly connected to a disc (14), and the driving end of the motor (13) is fixed to the edge of the disc (14). The outer wall of the well ring (1) is provided with a through hole (16) located outside the end of the filter screen (4), the outer wall of the well ring (1) is fixedly connected to a guide plate (17) located outside the through hole (16), a striking rod (18) is slidably inserted on the guide plate (17), the end of the striking rod (18) is fixedly connected to an elliptical ring (15) sleeved on the outside of the disc (14), and the elliptical ring (15) is moved back and forth left and right by rotating and squeezing the disc (14), and the motor (13) is connected to a switch 2 (11) and a mains power supply through a wire.

3. A manhole cover lifting device according to claim 2, characterized in that: The upper side wall of the filter screen (4) is fixedly connected to a guide rod (19), and the upper end sliding sleeve of the guide rod (19) is provided with a lifting rod (21). The outer wall of one end of the lifting rod (21) located in the well ring (1) is fixedly connected to a mounting plate (22), and the upper side wall of the mounting plate (22) is fixedly connected to a plurality of conical top rods (23) made of silicone and located at the lower side of the water outlet (5). The other end of the lifting rod (21) penetrates the inner wall of the well ring (1) and extends to the outside thereof. An opening (24) is provided at the connection between the well ring (1) and the lifting rod (21), and the outer wall of the impact rod (18) is fixedly connected to a trapezoidal plate (20), and the end of the lifting rod (21) located outside the well ring (1) contacts the inclined surface of the trapezoidal plate (20).

4. A manhole cover lifting device according to claim 1, characterized in that: A collecting trough (25) is fixedly connected to the outer wall of the well ring (1), a feed port (32) is provided on the outer wall of the collecting trough (25), a discharge port located at the lowest point of the filter screen (4) is provided on the outer wall of the well ring (1), the discharge port is arranged opposite to the feed port (32), a collecting box (29) is slidably arranged in the collecting trough (25), an inlet port arranged opposite to the feed port (32) is provided on the outer wall of the collecting box (29), and evenly distributed water permeable holes are provided on the lower side walls of the collecting trough (25) and the collecting box (29).

5. A manhole cover lifting device according to claim 4, characterized in that: An extrusion plate (33) is slidably arranged in the collection box (29), and a moving rod (31) is fixedly connected to the upper side wall of the extrusion plate (33). The upper end of the moving rod (31) passes through the upper side wall of the collection box (29) and extends to the outside of the collection box (29). A telescopic spring (30) is sleeved on the outer wall of the moving rod (31), and the two ends of the telescopic spring (30) are respectively fixedly connected to the upper side wall of the collection box (29) and the outer wall of the moving rod (31). A special-shaped opening (26) is opened on the base (2), and a moving plate (27) matching the special-shaped opening (26) is slidably arranged in the special-shaped opening (26). The upper end of the moving rod (31) is fixedly connected to the lower side wall of the moving plate (27), and the upper end of the moving plate (27) is fixedly connected to an arc plate (28).

6. A manhole cover lifting device according to claim 2, characterized in that: The diameter of the circular disk (14) is greater than the minor axis length of the elliptical ring (15).

7. A manhole cover lifting device according to claim 1, characterized in that: The switch 1 (10) and the switch 2 (11) are both time-delay reset switches.

8. A method for lifting a manhole cover using the manhole cover lifting device according to claim 3, characterized in that: The following steps are involved: S1, when the amount of water on the road increases, the accumulated water enters the trigger port (6), first squeezing the slide plate (7) to move, so that the trigger plate (9) first contacts the switch 2 (11), and the switch 2 (11) is pressed, the motor (13) is powered on, the motor (13) drives the disc (14) to perform circular motion in the elliptical ring (15), and pushes the elliptical ring (15) and the impact rod (18) to reciprocate left and right, the impact rod (18) continuously impacts the filter screen (4), causing the filter screen (4) to vibrate, so that the impurities on the surface of the filter screen (4) slide downward under the vibration and the scouring of the water body falling into the well ring (1), and are discharged from the discharge port to the collection tank (25); S2, when the elliptical ring (15) and the impact rod (18) move to the right, the height of the inclined surface contacted by the end of the lifting rod (21) increases continuously, thereby lifting the lifting rod (21) upward, so that the conical push rod (23) moves into the water outlet (5); when the elliptical ring (15) and the impact rod (18) move to the left, the lifting rod (21) moves downward, and the conical push rod (23) moves in the water outlet (5) through the up and down movement of the lifting rod (21), so that the impurities blocking the water outlet (5) are stirred and discharged smoothly; S3, after cleaning the filter (4) and the water inlet (5), if the water on the road surface still increases sharply, the accumulated water continues to push the slide plate (7) to slide, and the switch 1 (10) is pressed. At this time, the electric hydraulic jack is energized to start working, and the driving end of the electric hydraulic jack extends upward to lift the manhole cover (3). At this time, the accumulated water is directly discharged into the sewer.

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