Movable hydraulic well lid lifting device and using method

Abstract

The invention provides a movable hydraulic well lid lifting device and a using method, and belongs to the technical field of municipal facility maintenance. The device comprises a frame, a lifting frame and a pedal hydraulic mechanism, wherein the frame comprises a mounting seat and a positioning beam; the lifting frame penetrates through the positioning beam, is in sliding connection with the positioning beam and is used for being connected with a well lid. The pedal hydraulic mechanism is vertically arranged on the mounting base and comprises a pedal and a plunger, and the plunger is connected with the top of the lifting frame and used for enabling the lifting frame to ascend and descend. The device can be moved or fixed according to working requirements, and is more flexible to use and more convenient to operate; the device can be used by pedaling by a worker without using electric power, so that the applicability is higher; the whole structure is simple, connection is stable, the working efficiency of well lid lifting operation is improved, and the safety coefficient is high.

Description

Technical Field

[0001] The invention belongs to the technical field of municipal facility maintenance, and in particular relates to a mobile hydraulic manhole cover lifting device and a use method thereof. Background Art

[0002] In municipal engineering, opening and closing manhole covers is a frequent task. Traditional manhole cover opening methods usually use tools such as crowbars, which are not only laborious, but also easy to damage the manhole cover and the surrounding road surface; at the same time, for some heavier manhole covers, it is difficult to open them manually. In addition, some lifting devices in the prior art are equipped with an electric lifting mechanism on the lifting rod, and then the lifting rod is connected to the manhole cover for lifting, but the device cannot be used in places without power supply, and the electric lifting mechanism is not easy to control accurately. Therefore, there is a need for a manhole cover lifting device that is easy to operate, labor-saving, movable and suitable for various occasions. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a mobile hydraulic manhole cover lifting device and a use method, which are particularly suitable for flexible use, convenient operation, stronger applicability, improves the work efficiency of the manhole cover lifting operation, and has a high safety factor.

[0004] The technical solution adopted by the present invention is: a mobile hydraulic manhole cover lifting device, comprising:

[0005] A vehicle frame, including a mounting base and a positioning beam;

[0006] A lifting frame, passing through the positioning beam and slidably connected to the positioning beam, for connecting the manhole cover;

[0007] The pedal hydraulic mechanism is vertically arranged on the mounting seat and comprises a pedal and a plug. The plug is connected to the top of the lifting frame and is used to enable the lifting frame to perform lifting movements.

[0008] Furthermore, the lifting frame includes a lifting rod, a sliding beam and a hook; the lifting rod passes through the positioning beam, the top end of which is connected to the plug column, and the bottom end is vertically connected to the sliding beam; the hook is slidably arranged on the sliding beam.

[0009] Furthermore, a sliding sleeve is provided at the bottom of the positioning beam, and a limiting roller which is in rolling cooperation with the lifting rod is provided inside the sliding sleeve.

[0010] Furthermore, the sliding sleeve and the lifting rod are provided with matching limiting holes.

[0011] Furthermore, the lifting rod is connected to the plug via a limiting cross bar.

[0012] Furthermore, the sliding crossbeam is provided with a slide groove along its length direction, and the hook is detachably inserted into the slide groove.

[0013] Furthermore, the slide groove is provided with scale marks.

[0014] Furthermore, the hook comprises a matching threaded rod and a fastener for fixing the hook to the slide groove.

[0015] Furthermore, wheels are provided at the bottom of the frame, and the wheels are equipped with braking devices.

[0016] The method for using the above-mentioned mobile hydraulic manhole cover lifting device comprises the following steps:

[0017] Moving the mobile hydraulic manhole cover lifting device to the manhole cover;

[0018] Adjust the position of the hook according to the spacing between the holes of the manhole cover;

[0019] Pull out the limiter, open the pressure relief valve, and allow the hook to pass through the hole;

[0020] Stepping on the pedal of the foot hydraulic mechanism to raise the manhole cover until the sliding beam contacts the sliding sleeve;

[0021] inserting the limiting member;

[0022] Open the brake device and push the frame away from the wellhead;

[0023] After the construction of the wellhead is completed, the mobile hydraulic manhole cover lifting device is moved to the wellhead to reset the manhole cover.

[0024] The advantages and positive effects of the present invention are: the mobile hydraulic manhole cover lifting device proposed in the present application can be moved or fixed according to work requirements, and is more flexible to use and more convenient to operate; it can be used by workers' feet, without the need for electricity, and is more applicable; the overall structure is simple and the connection is stable, which improves the work efficiency of the manhole cover lifting operation and has a high safety factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a front view of a specific embodiment of the present invention;

[0026] Figure 2 is a side view of a specific embodiment of the present invention;

[0027] Figure 3 is a top view of a specific embodiment of the present invention;

[0028] Figure 4 is a schematic diagram of a sliding sleeve structure of a specific embodiment of the present invention;

[0029] Figure 5 It is a schematic diagram of the sliding beam structure of a specific embodiment of the present invention.

[0030] In the figure:

[0031] 10. Frame 11. Mounting seat 12. Column

[0032] 13, cross beam 14, positioning beam 141, sliding sleeve

[0033] 142, limit roller 143, limit hole 16, handrail

[0034] 15. Wheel 20. Lifting frame 21. Lifting rod

[0035] 22, sliding beam 221, chute 23, hook

[0036] 231, threaded rod 232, fastener 30, foot hydraulic mechanism

[0037] 31. Pedal 32. Plug 33. Pressure relief valve

[0038] 40. Limiting crossbar DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0040] like Figure 1-Figure 3 As shown, the present invention proposes a mobile hydraulic manhole cover lifting device, including a frame 10, a lifting frame 20 and a foot-operated hydraulic mechanism 30, wherein the frame 10 includes a mounting seat 11 and a positioning beam 14; the lifting frame 20 passes through the positioning beam 14 and is slidably connected to the positioning beam 14, and is used to connect the manhole cover; the foot-operated hydraulic mechanism 30 is erected on the mounting seat 11, and includes a pedal 31 and a plug 32, and the plug 32 is connected to the top of the lifting frame 20, and is used to make the lifting frame 20 perform lifting and lowering movements.

[0041] The frame 10 is made of steel and includes a plurality of columns 12 and a crossbeam 13 connecting the columns 12 as a whole. The frame 10 has good integrity and rigidity and is not prone to tipping over. The size and shape of the frame 10 are matched with the lifting frame 20, so that the lifting frame 20 can drive the manhole cover to rise or fall. The mounting seat 11 is arranged at the lower part of the frame 10 for mounting the pedal hydraulic mechanism 30, which is arranged at a position convenient for the operator to use the pedal hydraulic mechanism 30. Preferably, the mounting seat 11 is constructed on the relatively outer side of the frame 10 to avoid the moving path of the lifting frame 20, so that the overall structure is more compact. The positioning beam 14 is preferably arranged at the top position of the frame 10 and aligned with the center of the frame 10. The lifting frame 20 is connected to the middle part of the positioning beam 14. The top of the lifting frame 20 is exposed to the upper end surface of the positioning beam 14 and is connected to the plug 32 of the foot hydraulic mechanism 30. The lifting frame 20 can be connected to the manhole cover and rise or fall relative to the positioning beam 14 driven by the plug 32; the foot hydraulic mechanism 30 is a commercially available product and also has a pressure relief valve 33. By continuously pressing the pedal 31, the plug 32 can be relatively raised, and opening the pressure relief valve 33 can make the plug 32 fall and reset. Its specific structure is not described here.

[0042] Furthermore, the lifting frame 20 includes a lifting rod 21, a sliding beam 22 and a hook 23; the lifting rod 21 passes through the positioning beam 14, the top end of which is connected to the plug column 32, and the bottom end is vertically connected to the sliding beam 22; the hook 23 is slidably set on the sliding beam 22.

[0043] Specifically, the positioning beam 14 is provided with a connecting hole that cooperates with the lifting rod 21 to limit the lifting rod 21 from sliding in the connecting hole; the length of the sliding beam 22 corresponds to the common specifications of manhole covers; when in use, the frame 10 is moved to a position where the line between the sliding beam 22 and the hole of the manhole cover is aligned, and the spacing between the hooks 23 is adjusted according to the distance between the two holes, so that the hooks 23 can be aligned with the two holes respectively to meet the use requirements of manhole covers of different specifications and holes at different distances; the hooks 23 are preferably made of high-strength alloy steel, which has the characteristics of corrosion resistance and wear resistance.

[0044] Furthermore, if Figure 1 , Figure 4 As shown, a sliding sleeve 141 is provided at the bottom of the positioning beam 14 , and a limiting roller 142 is provided inside the sliding sleeve 141 . The limiting roller 142 is used for rolling cooperation with the lifting rod 21 .

[0045] The above-mentioned limiting sleeve 141 has a through hole, which is connected with the connection hole of the positioning beam 14. In a specific embodiment, the cross-section of the lifting rod 21 is circular, and the diameter of the through hole is larger than the diameter of the lifting rod 21. The limiting roller 142 is relatively arranged on the inner wall of the sleeve 141, and the distance between the relatively arranged limiting rollers 142 matches the diameter of the lifting rod 21, so that the lifting rod 21 and the limiting roller 142 fit tightly, so as to assist the lifting rod 21 to slide in the sleeve 141, and prevent the lifting rod 21 from deviating during the movement, thereby improving the safety of use. Preferably, the sleeve 141 has a certain length in the vertical direction, and its inner wall is provided with multiple groups of limiting rollers 142 in the vertical direction, so that the lifting rod 21 can slide more stably in the sleeve 141;

[0046] Preferably, a reinforcing beam is further provided between the sliding sleeve 141 and the cross beam 13 to make the sliding sleeve 141 more stable.

[0047] Furthermore, the sliding sleeve 141 and the lifting rod 21 are provided with matching limiting holes 143. When the lifting rod 21 drives the manhole cover to move to the set height, the limiting holes 143 of the sliding sleeve 141 and the lifting rod 21 are connected, and the provided limiting piece is inserted into the limiting hole 143 to fix the lifting rod 21 to the sliding sleeve 141. Then the moving frame 10 drives the manhole cover away from the vicinity of the wellhead to facilitate subsequent operations.

[0048] Preferably, in order to more conveniently control the alignment of the limiting hole 143 of the sleeve 141 and the limiting hole 143 of the limiting rod, the limiting hole 143 is set at a set distance from the bottom of the sleeve 141, and the limiting hole 143 on the lifting rod 21 is set corresponding to the set distance. When the lifting rod 21 rises to the point where the sliding beam 22 contacts the sleeve 141, the limiting holes 143 of the lifting rod 21 and the sleeve 141 are connected, and the limiting member is laterally inserted into the sleeve 141 to achieve the limitation of the lifting rod 21. At this time, the manhole cover is fixed at this height position. When it needs to be put back to the wellhead, the limiting member is removed, and the lifting rod 21 can be made to fall in cooperation with the foot hydraulic mechanism 30 to achieve the purpose of resetting the manhole cover.

[0049] The above-mentioned limiting holes 143 are arranged in plurality from top to bottom to better limit the lifting rod 21 and ensure that the manhole cover can be safely fixed and moved.

[0050] Furthermore, the lifting rod 21 and the plug 32 are connected by a limiting cross bar 40; specifically, the lifting rod 21 and the plug 32 are both arranged vertically, and the limiting cross bar 40 is arranged horizontally between the two. When the lifting rod 21 is lowered to a set height, the limiting cross bar 40 contacts the upper end surface of the positioning beam 14 to limit the lowering height of the lifting rod 21. It can be understood that the lowering height of the lifting rod 21 can meet the use requirements of the hook 23 extending into the manhole cover.

[0051] Furthermore, if Figure 5 As shown, the sliding beam 22 is provided with a sliding groove 221 along its length direction, and the hook 23 passes through the sliding groove 221 and is detachably arranged in the sliding groove 221 .

[0052] Specifically, the sliding beam 22 is made of square steel, the middle part of its upper end surface is connected to the bottom of the lifting rod 21, and the slide grooves 221 are symmetrically arranged on both sides of the connection part. The slide grooves 221 pass through the upper end surface and the lower end surface of the sliding beam 22, and the hooks 23 vertically pass through the slide grooves 221 and can slide in the slide grooves 221; preferably, the two hooks 23 are moved symmetrically during use so that the forces on both ends of the sliding beam 22 are balanced.

[0053] In a specific embodiment, the hooks 23 are first connected to the holes of the manhole cover to be lifted, and then the hooks 23 are connected to the sliding beam 22, so as to better control the connection position of the hooks 23.

[0054] Furthermore, the slide groove 221 is provided with scale marks to facilitate adjusting the positions of the two hooks 23 according to the distance between the holes so that the two hooks 23 are symmetrical and aligned with the holes at the same time.

[0055] The above-mentioned hook 23 includes a matching threaded rod 231 and a fastener 232, which are used to fix the hook 23 to the slide groove 221; specifically, the threaded rod 231 is located at the upper part of the hook 23, the threaded rod 231 vertically passes through the slide groove 221, and the fastener 232 is respectively arranged on the upper end surface and the lower end surface of the slide groove 221. Tightening the fastener 232 can fix the hook 23 to the slide groove 221, so that the hook 23 will not move relative to each other during the lifting or lowering process, thereby further improving the safety of use.

[0056] Furthermore, the bending directions of the hooks 23 are set in opposite directions; when in use, the hooks 23 are first passed through the holes of the manhole cover, and then the two hooks 23 are moved closer to or farther away from each other according to the bending directions of the hooks 23, so that the hooks 23 hook the inner wall of the manhole cover around the hole, ensuring that the manhole cover will not fall off the hooks 23 during the lifting or moving process. Preferably, the two hooks 23 move closer to or farther from each other by the same distance, so as to ensure that the hooks 23 after moving are still in a symmetrical position relative to the sliding beam 22, so as to ensure force balance.

[0057] Furthermore, wheels 15 are provided at the bottom of the frame 10, and the wheels 15 are equipped with braking devices, so that the frame 10 can be moved to the top of the manhole cover for lifting operations, and then the manhole cover can be driven away from the wellhead, and the manhole cover can be returned to the wellhead after the operation at the wellhead is completed.

[0058] Preferably, the frame 10 is also provided with a handrail 16 to facilitate an operator to push the frame 10 for overall movement.

[0059] The present application provides a method for using a mobile hydraulic manhole cover lifting device, comprising the following steps: moving the mobile hydraulic manhole cover lifting device of the present application to the position of the manhole cover to be lifted, so that the sliding beam 22 is aligned with the holes of the manhole cover, and opening the brake device of the wheel 15 to fix the frame 10; adjusting the position of the hook 23 according to the spacing between the holes of the manhole cover so that the hook 23 is aligned with the holes; pulling out the limiting piece in the limiting hole 143, opening the pressure relief valve 33 of the pedal hydraulic mechanism 30, so that the hook 23 is inserted into the hole. In this embodiment, the bending direction of the hook 23 is set back to the setting, and again The hooks 23 are moved away from each other to hook the inner wall of the manhole cover around the hole; the operator continuously steps on the pedal 31 of the foot hydraulic mechanism 30 to make the plunger 32 rise and drive the lifting rod 21 and the manhole cover to rise synchronously until the sliding beam 22 contacts the sliding sleeve 141 and cannot be lifted further. At this time, the limit piece is inserted into the limit hole 143, the brake device is opened, and the frame 10 is pushed away from the wellhead; after the construction of the wellhead is completed, the frame 10 is moved to the wellhead so that the manhole cover is aligned with the wellhead, and then the pressure relief valve 33 is opened to make the manhole cover descend to the wellhead to seal the wellhead.

[0060] In a specific embodiment, the holes of the manhole cover are blocked by mud and dust. After the frame 10 is fixed at the manhole mouth, the hook 23 is removed, and the hole is cleaned with the hook 23. The hook 23 is then inserted into the hole and temporarily fixed, and then the hook 23 is connected to the sliding beam 22, and then the manhole cover is lifted, moved and reset.

[0061] The mobile hydraulic manhole cover lifting device proposed in this application can be moved or fixed according to work requirements, and is more flexible to use and more convenient to operate; it can be used by workers' feet, does not require electricity, and is more applicable; the overall structure is simple and the connection is stable, which improves the work efficiency of the manhole cover lifting operation and has a high safety factor.

[0062] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A mobile hydraulic manhole cover lifting device, characterized in that ,include: A vehicle frame, including a mounting base and a positioning beam; A lifting frame, passing through the positioning beam and slidably connected to the positioning beam, for connecting the manhole cover; The pedal hydraulic mechanism is vertically arranged on the mounting seat and comprises a pedal and a plug. The plug is connected to the top of the lifting frame and is used to enable the lifting frame to perform lifting movements.

2. The mobile hydraulic manhole cover lifting device according to claim 1 is characterized in that: The lifting frame comprises a lifting rod, a sliding beam and a hook; the lifting rod passes through the positioning beam, the top end of which is connected to the plug column, and the bottom end is vertically connected to the sliding beam; the hook is slidably arranged on the sliding beam.

3. The mobile hydraulic manhole cover lifting device according to claim 2 is characterized in that: A sliding sleeve is provided at the bottom of the positioning beam, and a limiting roller which is in rolling cooperation with the lifting rod is provided in the sliding sleeve.

4. The mobile hydraulic manhole cover lifting device according to claim 3 is characterized in that: The sliding sleeve and the lifting rod are provided with matching limiting holes.

5. The mobile hydraulic manhole cover lifting device according to any one of claims 2 to 4, characterized in that: The lifting rod is connected to the plug via a limiting cross bar.

6. The mobile hydraulic manhole cover lifting device according to claim 5 is characterized in that: The sliding crossbeam is provided with a sliding groove along its length direction, and the hook is detachably inserted into the sliding groove.

7. The mobile hydraulic manhole cover lifting device according to claim 6 is characterized in that: The slide groove is provided with scale marks.

8. The mobile hydraulic manhole cover lifting device according to claim 6 or 7, characterized in that: The hook comprises a matching threaded rod and a fastener, which are used to fix the hook to the slide slot.

9. The mobile hydraulic manhole cover lifting device according to any one of claims 1 to 4 and 6 and 7, characterized in that: The bottom of the frame is provided with wheels, and the wheels are equipped with braking devices.

10. The method for using the mobile hydraulic manhole cover lifting device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Moving the mobile hydraulic manhole cover lifting device to the manhole cover; Adjust the position of the hook according to the spacing between the holes of the manhole cover; Pull out the limiter, open the pressure relief valve, and allow the hook to pass through the hole; Stepping on the pedal of the foot hydraulic mechanism to raise the manhole cover until the sliding beam contacts the sliding sleeve; inserting the limiting member; Open the brake device and push the frame away from the wellhead; After the construction of the wellhead is completed, the mobile hydraulic manhole cover lifting device is moved to the wellhead to reset the manhole cover.

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