Opening and closing tool for inspection well cover plate

Abstract

The utility model provides an opening and closing tool for an inspection well cover plate, which comprises a lever arm and a hook component, and the lever arm is bent to form a primary lever arm and a secondary lever arm; pulleys are symmetrically mounted on the two sides of the connecting end of the first-stage lever arm and the second-stage lever arm; the tail end of the first-stage lever arm is connected with a handle through a telescopic arm; a hook connecting groove is formed in the tail end of the second-stage lever arm, and the hook component is detachably connected with the second-stage lever arm through the hook connecting groove. According to the opening and closing tool, the lever principle is utilized, and the characteristics of the pulley are combined, so that the opening and closing operation of the cover plate is time-saving and labor-saving, the labor cost and the time cost are reduced, the damage to the cover plate is reduced, the safety of operating personnel is guaranteed, corresponding hook parts can be flexibly replaced according to different types of well lids, and the working efficiency is improved. Therefore, the opening and closing operation requirements of inspection well cover plates with different shapes or different functions are met, and the application range is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of opening and closing tools and machinery, in particular to an opening and closing tool for a manhole cover. Background Art

[0002] As an important part of urban infrastructure, manhole covers are related to the safety under people's feet. Due to the different functions of manholes in the underground pipeline system, the shapes, materials, and specifications of the covers are various, resulting in extremely difficult opening and closing operations of manhole covers during the daily maintenance of underground pipelines. Traditional methods often use various tools such as steel hammers, pickaxes, and crowbars for brute force operations, which not only damage the manhole covers but also consume working time. To improve work efficiency, ensure operation safety, and reduce damage to manhole covers, an opening and closing tool for manhole covers of underground pipelines is proposed. Content of the Utility Model

[0003] The purpose of the utility model is to provide an opening and closing tool that saves time and effort and can meet different manhole covers.

[0004] To achieve the above object, the utility model provides an opening and closing tool for a manhole cover, including a lever arm and a hook component. The lever arm is bent to form a first-class lever arm and a second-class lever arm, so that the connection end of the first-class lever arm and the second-class lever arm forms a bent corner; pulleys are symmetrically installed on both sides of the bent corner; the end of the first-class lever arm is connected to a handle through a telescopic arm; a hook connection groove is provided at the end of the second-class lever arm, and the hook component is detachably connected to the second-class lever arm through the hook connection groove.

[0005] Further, the bending angle of the lever arm is greater than 90 degrees.

[0006] Further, a reinforcing rib is provided at the bent corner of the lever arm.

[0007] Further, the first-class lever arm and the telescopic arm are telescopically connected, so that the length of the telescopic arm can be adjusted.

[0008] Further, installation holes are provided at the end of the second-class lever arm, and the hook component is connected to the second-class lever arm through the installation holes by a pin; the hook component is detachably connected to the second-class lever arm through a limit pin.

[0009] The hook component is a detachable member, and hook components with different shapes and sizes can be selected according to different working conditions and manhole cover types. According to the working needs, the corresponding hook component can be replaced to meet manhole covers with different shapes and functions.

[0010] Compared with the prior art, the advantages of the utility model are as follows:

[0011] 1. The opening and closing tool of the present utility model utilizes the lever principle and combines with the pulley function, making the opening and closing operation of the cover plate time-saving and labor-saving. While reducing the labor cost and time cost, it reduces the damage to the cover plate and ensures the safety of the operators.

[0012] 2. The opening and closing tool of the present utility model can be detachably connected through the hook component, so that it can flexibly replace the corresponding hook component according to different types of well covers during work, thereby meeting the opening and closing operation requirements of manhole covers with different shapes or functions, and having a wider application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the opening and closing tool for the manhole cover of the embodiment of the present utility model;

[0014] Figure 2 is a side sectional view of the opening and closing tool for the manhole cover of the embodiment of the present utility model;

[0015] Figure 3 is a front sectional view of the opening and closing tool for the manhole cover of the embodiment of the present utility model;

[0016] Figure 4 is a top view of the opening and closing tool for the manhole cover of the embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be further described below.

[0018] This embodiment provides an opening and closing tool for a manhole cover, as Figures 1-4 shown, which includes a lever arm and a hook component 5. Among them, the lever arm is bent to form a primary lever arm 1 and a secondary lever arm 7, as Figure 3 shown, and the bending angle is greater than 90 degrees to form an obtuse angle; a reinforcing rib is provided at the bending corner to enhance the connection strength between the primary lever arm 1 and the secondary lever arm 7. At the same time, as Figure 2 shown, pulleys 4 are symmetrically installed at the left and right ends of the bending corner. By utilizing the characteristics of the rollers 4 and combining with the lever function of the lever arm, the labor cost and time cost are reduced.

[0019] In addition, as Figure 1 and Figure 3 shown, a telescopic hole 6 is provided at the end of the primary lever arm 1, and through this telescopic hole 6, it is telescopically connected with a telescopic arm 2. The diameter of the telescopic arm 2 is smaller than that of the primary lever arm 1, so that the telescopic arm 2 is inserted into the primary lever arm 1, and through the cooperation of the telescopic hole 6 and the pin, the telescopic adjustment of the telescopic arm 2 is realized.

[0020] In this embodiment, one end of the telescopic arm 2 is connected to the primary lever arm 1, and the other end is connected to a handle 3. As Figure 1 and Figure 4 shown, two handles 3 are symmetrically installed on both sides of the end of the telescopic arm 2 and are perpendicularly connected to the telescopic arm 2.

[0021] In this embodiment, as Figure 1 and Figure 3 shown, a hook connection groove is provided at the end of the secondary lever arm 7, and through the hook connection groove, it is detachably connected to the hook component 5. An installation hole position is opened at the end of the secondary lever arm 7, and the hook component 5 is detachably connected to the hook connection groove through the cooperation of this installation hole position and the limit slot. Among them, the hook component is a detachable component, and hook components of different shapes and sizes can be selected according to different working conditions and manhole cover types, and the corresponding hook components can be replaced according to work needs, so as to meet manhole covers of different shapes and different functions.

[0022] Specific usage method of the opening and closing tool for the manhole cover in this embodiment: When in use, insert the hook of the hook component 5 into the hole of the manhole cover, and the operator holds the handle 3 and presses down. Since the lever arm is bent at an obtuse angle to form the primary lever arm 1 and the secondary lever arm 7, when the primary lever arm 1 is subjected to a downward pressure, at this time, through the transmission and conversion of the downward pressure, the pulley 4 will move forward, and the secondary lever arm 7 drives the hook component 5 to lift upward, thereby pulling open the manhole cover. At the same time, during this process, two sets of the opening and closing tools in this embodiment can also be used for operation simultaneously. The opening and closing tool in this embodiment utilizes the principles of levers and pulleys at the same time, is simple and convenient to operate, saves time and effort, effectively reduces damage to the manhole cover, ensures the safety of operators, and can also flexibly replace the hook component 5 according to different types of manhole covers, so as to meet various existing and functional manhole covers, and has a wider application range.

[0023] The above is only the preferred embodiment of the present utility model and does not impose any limitation on the present utility model. Any person skilled in the art within the technical field, without departing from the technical solution of the present utility model, makes any form of equivalent replacement or modification and other changes to the technical solution and technical content disclosed in the present utility model, all of which belong to the content of the technical solution of the present utility model and still fall within the protection scope of the present utility model.

Claims

1. An opening and closing tool for a manhole cover, characterized in that, It includes a lever arm and a hook component. The lever arm is formed into a primary lever arm and a secondary lever arm by bending, such that a connecting end of the primary lever arm and the secondary lever arm forms a bent corner. Pulleys are symmetrically installed on both sides at the bent corner. The end of the primary lever arm is connected to a handle through a telescopic arm. A hook connection groove is provided at the end of the secondary lever arm, and the hook component is detachably connected to the secondary lever arm through the hook connection groove.

2. The opening and closing tool for the manhole cover according to claim 1, characterized in that, The bending angle of the lever arm is greater than 90 degrees.

3. The opening and closing tool for the manhole cover according to claim 1, characterized in that, Reinforcing ribs are provided at the bent corner of the lever arm.

4. The opening and closing tool for the manhole cover according to claim 1, characterized in that, The primary lever arm and the telescopic arm are telescopically connected.

5. The opening and closing tool for the manhole cover according to claim 1, characterized in that, The hook component is detachably connected to the secondary lever arm through a limit pin.

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