Manhole cover dismounting tool

Abstract

The utility model discloses a manhole cover dismounting and mounting tool, which comprises a mounting seat, a connecting frame, a dismounting and mounting stress frame, a pull rod and a top frame, and the mounting seat, the connecting frame, the dismounting and mounting stress frame, the pull rod and the top frame are matched with one another to complete dismounting and mounting tasks of a manhole cover, so that an operator can conveniently dismount and mount the manhole cover. And the dismounting stress frame can assist the pull rod in carrying out the stable dismounting process, so that the manhole cover dismounting tool has the advantages of being reasonable in design, stable in structure and easy and convenient to operate, and the dismounting efficiency and safety of the manhole cover can be improved.

Description

Technical Field

[0001] The utility model relates to a manhole cover disassembly and assembly tool. Background Art

[0002] High-pressure vessels often have very high internal pressures, and most of them use a hemispherical head with an elliptical manhole on the head. Then, through the self-sealing principle, the elliptical manhole cover is pressed against the manhole and the gasket is compressed to achieve a sealing effect.

[0003] Self-sealing manholes utilize the high pressure inside the container. The higher the pressure inside the container, the better the sealing performance. Therefore, they are widely used. However, due to their special shape, oval manhole covers are often difficult to disassemble and assemble, which can easily cause the manhole cover to fall off or even fall into the container or pipe, causing great trouble for maintenance and reinstallation, and becoming a problem during on-site maintenance. In addition, the existing old-fashioned manhole disassembly and assembly tools are complex in structure and cumbersome to operate. The disassembly and assembly process often requires the cooperation of multiple people, which is not conducive to on-site disassembly and assembly during the maintenance period. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a manhole cover disassembly and assembly tool.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A manhole cover disassembly and assembly tool is used to disassemble and assemble the manhole cover after being connected to a manhole seat and a manhole cover installed inside the manhole seat. The tool comprises a mounting seat fixedly installed outside the manhole seat, a connecting frame hingedly installed with the mounting seat, a disassembly and assembly force frame hingedly installed with the connecting frame, a pull rod passing through the disassembly and assembly force frame and having a middle section assembled with the disassembly and assembly force frame, and a top frame fixedly installed with the manhole cover by bolts and hingedly installed with the disassembly and assembly force frame and the pull rod respectively.

[0007] Preferably, the mounting seat comprises two mounting seat side plates parallel to each other, and a mounting seat top plate welded and fixed to the mounting seat side plates, the mounting seat top plate abuts against the outside of the manhole seat and is fixedly installed by bolts;

[0008] Furthermore, a connecting frame hinge end is extended from one end of the mounting seat side plate.

[0009] Preferably, the connecting frame includes two connecting side plates parallel to each other, and a spacer plate welded between the two connecting side plates. Two spacer plates are provided and are located at both ends of the connecting side plates.

[0010] Preferably, the disassembly and assembly force-bearing frame comprises two symmetrically arranged L-shaped steel plates and stud bolts distributed at the lower ends of the two L-shaped steel plates.

[0011] Preferably, the L-shaped steel plate comprises a connecting frame hinge end and a manhole cover assembly end; a connecting frame hinge hole is provided on the connecting frame hinge end, and an arc groove with the connecting frame hinge hole as the center is also provided on the connecting frame hinge end;

[0012] Furthermore, the assembly end of the manhole cover is arranged in an arc shape, a shaft sleeve hole is provided at the lower end near the stud bolt, and a top frame hinge hole is provided at the upper end.

[0013] Preferably, the pull rod comprises a rod body with an external thread at the end, a shaft sleeve movably sleeved on the middle section of the rod body, and a hinged mounting frame mounted on the upper end of the rod body and capable of being hingedly mounted with the top frame;

[0014] Furthermore, convex shafts are provided at both ends of the shaft sleeve; the hinged frame includes a hinged horizontal plate with a hollow middle part, hinged side plates welded on both sides of the hinged horizontal plate, a pin installed between the two hinged side plates and capable of being hingedly installed with the top frame, and a fixed ring welded at the hollow part of the hinged horizontal plate and provided with an internal thread.

[0015] Preferably, the top frame includes a top frame body that is fixed by bolts after abutting against the manhole cover, and a top frame side plate formed by bending both ends of the top frame body to the same side by 90°;

[0016] Furthermore, a first hinge hole for hinged installation in cooperation with the disassembly and assembly of the force-bearing frame is provided at one end of the top frame side plate, and a second hinge hole for hinged installation in cooperation with the pull rod is provided at the other end.

[0017] The beneficial effects of the utility model are:

[0018] 1. Easy to operate: Through the design of the pull rod, the operator can easily control the up and down movement of the top frame, so as to realize the lifting and lowering of the manhole cover without excessive physical strength or tools;

[0019] 2. Stability: The presence of the disassembly and assembly force frame provides additional support and stability, so that the manhole cover will not shake or tilt during the disassembly and assembly process, thereby ensuring the safety and accuracy of the operation;

[0020] 3. Adjustability: The design of the connecting frame and the top frame allows it to be adjusted within a certain range to adapt to manhole covers of different sizes and shapes, increasing the flexibility and applicability of the tool;

[0021] 4. High efficiency: Due to the reasonable structural design of the tool, the operator can quickly complete the disassembly and assembly tasks of the manhole cover, saving time and labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of a manhole cover disassembly and assembly tool of the utility model;

[0023] Figure 2 for Figure 1 Structural diagram of the middle mounting seat;

[0024] Figure 3 for Figure 2 Side view of

[0025] Figure 4 for Figure 1 Structural diagram of the middle connecting frame;

[0026] Figure 5 for Figure 1 Structural diagram of disassembly and assembly of the load-bearing frame;

[0027] Figure 6 for Figure 5 Side view of

[0028] Figure 7 for Figure 1 Structural diagram of the middle tie rod;

[0029] Figure 8 for Figure 7 An enlarged view of the partial view A in FIG.

[0030] Fig. 9 for Figure 8 Side view of

[0031] Fig.10 for Figure 1 Structural diagram of the middle top frame;

[0032] Fig.11 for Fig.10 Side view of. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0034] Example

[0035] like Figure 1-11 As shown, a manhole cover disassembly and assembly tool is used for disassembly and assembly of manhole covers of pressure vessels such as high-pressure heaters. After being connected to a manhole seat 1 and a manhole cover 2 installed inside the manhole seat 1, the manhole cover 2 can be disassembled and assembled, comprising a mounting seat 31 fixedly installed on the outside of the manhole seat 1, a connecting frame 32 hingedly installed with the mounting seat 31, a disassembly and assembly force frame 33 hingedly installed with the connecting frame 32, a pull rod 34 passing through the disassembly and assembly force frame 33 and having a middle section assembled with the disassembly and assembly force frame 33, and a top frame 35 fixedly installed with the manhole cover 2 by bolts and hingedly installed with the disassembly and assembly force frame 33 and the pull rod 34 respectively.

[0036] The mounting seat 31 includes two mounting seat side plates 311 parallel to each other, and a mounting seat top plate 312 welded and fixed to the mounting seat side plates 311. The mounting seat top plate 312 abuts against the outside of the manhole seat 1 and is fixedly installed by bolts; one end of the mounting seat side plate 311 is also extended with a connecting frame hinge end 3111, specifically, it is convenient for the connecting frame 32 to be embedded in the gap between the connecting frame hinge ends 3111 and assembled through the hinge shaft.

[0037] The connecting frame 32 includes two parallel connecting side plates 321, a spacer plate 322 welded between the two connecting side plates 321, and two spacer plates 322 are provided, and are located at both ends of the connecting side plates 321. The disassembly and assembly force frame 33 includes two symmetrically arranged L-shaped steel plates 331, and stud bolts 332 distributed at the lower ends of the two L-shaped steel plates 331. Specifically, the two ends of the stud bolts 332 pass through the two L-shaped steel plates 331 respectively, and then are fixed by nuts, so that the disassembly and assembly force frame 33 is formed.

[0038] The L-shaped steel plate 331 includes a connecting frame hinge end 3311 and a manhole cover assembly end 3312 .

[0039] Regarding the hinged end 3311 of the connecting frame, a hinged hole 33111 of the connecting frame is opened on the hinged end 3311 of the connecting frame, and an arc groove 33112 with the hinged hole 33111 of the connecting frame as the center is opened on the hinged end 3311 of the connecting frame. Specifically, the connecting frame 32 can not only be hingedly installed with the disassembly and assembly force-bearing frame 33, but also can cooperate with the arc groove 33112 to adjust the rotation angle of the connecting frame 32, which is more conducive to the disassembly and assembly of the manhole cover 2.

[0040] Regarding the manhole cover assembly end 3312, the manhole cover assembly end 3312 is arranged in an arc shape, and a sleeve hole 33121 is opened at its lower end near the stud bolt 332, and a top frame hinge hole 33122 is opened at its upper end. Specifically, the manhole cover assembly end 3312 extends to the inside of the manhole seat 1 and is hingedly installed with the top frame 35.

[0041] The pull rod 34 includes a rod body 341 with an external thread at the end, a sleeve 342 movably mounted on the middle section of the rod body 341, and a hinged frame 343 mounted on the upper end of the rod body 341 and capable of being hingedly mounted with the top frame 35. The two ends of the sleeve 342 are provided with convex shafts 3421. Specifically, after the pull rod 34 passes through the disassembly and assembly force frame 33, the convex shafts 3421 at the two ends of the sleeve 342 can be assembled with the sleeve holes 33121. During the disassembly and assembly process of the manhole cover 2, the sleeve 342 can not only make the rod body 341 slide up and down in the disassembly and assembly force frame 33, but also make the rod body 341 rotate and move in the disassembly and assembly force frame 33. The hinged frame 343 includes a hinged horizontal plate 3431 with a hollow middle portion, hinged side plates 3432 welded to both sides of the hinged horizontal plate 3431, a pin shaft 3433 installed between the two hinged side plates 3432 and capable of being hingedly installed with the top frame 35, and a fixing ring 3434 welded to the hollow portion of the hinged horizontal plate 3431 and having an internal thread. Specifically, the end of the rod body 341 passes through the hinged horizontal plate 3431 and is tightened with the fixing ring 3434. Therefore, the rod body 341 can also rotate and move in the shaft sleeve 342, so that the rod body 341 can be easily disassembled and assembled.

[0042] In this embodiment, the lower end of the rod body 341 is bent to facilitate the operator to hold it.

[0043] The top frame 35 includes a top frame body 351 fixed by bolts after being abutted against the manhole cover 2, and a top frame side plate 352 formed by bending both ends of the top frame body 351 to the same side by 90 degrees; one end of the top frame side plate 352 is provided with a first hinge hole 3521 for hinged installation in cooperation with the disassembly and assembly of the force-bearing frame 33, and the other end is provided with a second hinge hole 3522 for hinged installation in cooperation with the pull rod 34. Specifically, the first hinge hole 3521 is aligned with the top frame hinge hole 33122 and then installed through a hinge shaft, and the second hinge hole 3522 is aligned with the hinged side plate 3432 and then the pin shaft 3433 is assembled.

[0044] During the disassembly and assembly process of the manhole cover 2, the operator only needs to operate the pull rod 34 to lift the top frame 35 through the pull rod 34 to lift the manhole cover 2, or pull back the top frame 35 through the pull rod 34 to close the manhole cover 2 with the manhole seat 1 again. In this process, the disassembly and assembly force frame 33 can assist the pull rod 34 in stable disassembly and assembly.

[0045] It should be further explained that after the manhole cover 2 is disassembled and assembled, the manhole cover disassembly tool no longer needs to be fixed to the manhole seat 1 and the manhole cover 2. Therefore, it is necessary to remove the manhole cover disassembly tool by loosening the studs that pass through the mounting seat 31 and are screwed into the manhole seat 1, and loosening the studs that pass through the top frame 35 and are screwed into the manhole cover 2, until the manhole cover needs to be disassembled and reinstalled for use.

[0046] The above-mentioned embodiments of the utility model are not intended to limit the protection scope of the utility model, and the implementation methods of the utility model are not limited to these. All other various forms of modifications, replacements or changes made to the above-mentioned structure of the utility model based on the above-mentioned contents of the utility model, in accordance with the common technical knowledge and customary means in the field, without departing from the above-mentioned basic technical ideas of the utility model, should fall within the protection scope of the utility model.

Claims

1. A manhole cover disassembly and assembly tool, which is connected to a manhole seat and a manhole cover installed inside the manhole seat to disassemble and assemble the manhole cover, characterized in that: It includes a mounting seat fixedly installed on the outside of the manhole seat, a connecting frame hingedly installed with the mounting seat, a disassembly and assembly force frame hingedly installed with the connecting frame, a pull rod passing through the disassembly and assembly force frame and having a middle section assembled with the disassembly and assembly force frame, and a top frame fixedly installed with the manhole cover by bolts and hingedly installed with the disassembly and assembly force frame and the pull rod respectively.

2. The manhole cover disassembly and assembly tool according to claim 1, characterized in that: The mounting seat comprises two mounting seat side plates parallel to each other, and a mounting seat top plate welded and fixed to the mounting seat side plates. The mounting seat top plate abuts against the outside of the manhole seat and is fixed and installed by bolts. One end of the mounting seat side plate is also extended to be provided with a connecting frame hinge end.

3. The manhole cover disassembly and assembly tool according to claim 1, characterized in that: The connecting frame comprises two connecting side plates which are parallel to each other, and a spacer plate which is welded between the two connecting side plates. Two spacer plates are provided and are located at two ends of the connecting side plates.

4. The manhole cover disassembly and assembly tool according to claim 1, characterized in that: The disassembly and assembly force-bearing frame comprises two symmetrically arranged L-shaped steel plates and stud bolts distributed at the lower ends of the two L-shaped steel plates.

5. The manhole cover disassembly and assembly tool according to claim 4, characterized in that: The L-shaped steel plate includes a connecting frame hinge end and a manhole cover assembly end; a connecting frame hinge hole is provided on the connecting frame hinge end, and an arc groove with the connecting frame hinge hole as the center is also provided on the connecting frame hinge end; the manhole cover assembly end is arranged in an arc shape, a shaft sleeve hole is provided at the lower end near the stud bolt, and a top frame hinge hole is provided at the upper end.

6. The manhole cover disassembly and assembly tool according to claim 1, characterized in that: The pull rod includes a rod body with an external thread at the end, a sleeve movably mounted on the middle section of the rod body, and a hinged frame mounted on the upper end of the rod body and capable of being hingedly mounted with a top frame; convex shafts are arranged at both ends of the sleeve; the hinged frame includes a hinged cross plate with a hollow middle portion, hinged side plates welded on both sides of the hinged cross plate, a pin installed between the two hinged side plates and capable of being hingedly mounted with the top frame, and a fixed collar welded at the hollow portion of the hinged cross plate and provided with an internal thread.

7. The manhole cover disassembly and assembly tool according to claim 1, characterized in that: The top frame includes a top frame body that is fixed by bolts after abutting against the manhole cover, and a top frame side plate formed by bending 90° to the same side at both ends of the top frame body; one end of the top frame side plate is provided with a first hinge hole for hinged installation in cooperation with the disassembly and assembly of the force-bearing frame, and the other end is provided with a second hinge hole for hinged installation in cooperation with the pull rod.

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