A manhole cover opener and closer

Abstract

The utility model discloses a manhole cover opener and closer, which relates to the technical field of manhole cover openers and closeers, and solves the problem that the current manhole cover opening method is cumbersome and laborious. The key points of its technical solution are: it includes a jack, a top plate, a mobile bracket and a pair of pull plate hooks, the top plate is connected to the top of the jack, the mobile bracket is connected to the bottom of the jack, one end of the pair of pull plate hooks is passed through the top plate and fixed by nuts, and the other end passes through the mobile bracket so that the hook is placed at the bottom of the mobile bracket. The utility model combines the jack with a special frame, and the manhole cover can be opened and moved by operating the jack, which reduces the work intensity and can improve the safety of the staff's operation.

Description

Technical Field

[0001] The utility model relates to the technical field of manhole cover openers and closers, in particular to a manhole cover opener and closer. Background Art

[0002] The manhole cover opener and closer is composed of a jack and a special frame. Through the working principle of the jack, it can be used to pry up the manhole cover with effort. The use of the manhole cover opener and closer has changed the working method of pipeline network inspection. From the original two people prying up the manhole cover with a crowbar, it has been changed to a combination of a jack and a special frame. The manhole cover can be opened and moved by operating the jack, which greatly reduces the work intensity. During the pipeline network inspection, inspectors need to pry up the manhole cover in groups of two, and then move the manhole cover after prying it up with a crowbar. In this process, inspectors need to pry up the weight of the manhole cover of more than 40kg, which is difficult and may cause mechanical damage to the staff. Utility Model Content

[0003] In view of the existing technical problems, the purpose of the utility model is to provide a manhole cover opener and closer to solve the above problems. Through the combination of a jack and a special frame, the manhole cover can be opened and moved by operating the jack, which reduces the work intensity and can improve the safety of the operator's operation.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] A manhole cover opener and closer comprises a jack, a top plate, a movable bracket and a pair of pull plate hooks, wherein the top plate is connected to the top of the jack, the movable bracket is connected to the bottom of the jack, one end of the pair of pull plate hooks is passed through the top plate and fixed by nuts, and the other end thereof passes through the movable bracket so that the hooks are placed at the bottom of the movable bracket.

[0006] Preferably, it also includes a pair of guide rods and movable sleeves adapted to the guide rods, the movable sleeves are fixed at both ends of the top plate, the upper ends of the guide rods are inserted into the movable sleeves and can move relative to the movable sleeves, and the lower ends of the guide rods are fixed on the top of the movable bracket.

[0007] Preferably, the movable sleeve is fixed to both sides of the top plate by welding.

[0008] Preferably, the movable end of the jack is connected to the top plate, and the fixed end thereof is connected to the movable bracket, and the top plate moves upward or downward when the jack moves.

[0009] Preferably, a waist-shaped hole is provided on the top plate, and the pull plate hook is fixed in the waist-shaped hole by a nut.

[0010] Preferably, the bottom of the movable bracket is connected with load wheels.

[0011] Preferably, the top plate and the movable bracket are both made of stainless steel.

[0012] In summary, the utility model has the following beneficial effects:

[0013] Through the coordination of the jack, top plate, plate hook and mobile bracket, the hook of the plate hook is inserted into the opening hole of the manhole cover. Using the working principle of the jack, the top plate drives the plate hook to pry up the manhole cover, which has the advantages of saving time and effort. The method of prying up the manhole cover by the manhole cover opener and closer has changed the working method of pipeline network inspection, from the original two people prying up the manhole cover with a crowbar to a combination of a jack and a special frame. The manhole cover can be opened and moved by operating the jack, reducing the work intensity. In the case of inconvenience for personnel to stand, one person can also pry up and move the manhole cover well, improving the safety of the staff's operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of the manhole cover opener and closer of the utility model;

[0015] Figure 2 It is a plan view of the top plate of the utility model.

[0016] Figure numerals: 1. jack; 2. top plate; 3. movable bracket; 4. pull plate hook; 5. nut; 6. load-bearing wheel; 7. guide rod; 8. movable sleeve; 9. waist-shaped hole. DETAILED DESCRIPTION

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0018] See also Figure 1-Figure 2 A typical embodiment of the present application provides a manhole cover opener and closeer, including a jack 1, a top plate 2, a movable bracket 3 and a pair of pull plate hooks 4. The jack 1 is a jack 1 in the prior art, the top plate 2 and the movable bracket 3 are both made of stainless steel, and a load wheel 6 is connected to the bottom of the movable bracket 3. Specifically, the top plate 2 is connected to the top of the jack 1, the movable bracket 3 is connected to the bottom of the jack 1, the movable end of the jack 1 is connected to the top plate 2, and the fixed end thereof is connected to the movable bracket 3. When the jack 1 moves, the top plate 2 moves upward or downward relative to the movable bracket 3.

[0019] A circular through hole is provided on the top plate 2 and the movable bracket 3. The upper ends of a pair of pull plate hooks 4 are inserted through the circular through holes of the top plate 2 and fixed by nuts 5. The lower ends of the pull plate hooks 4 pass through the circular through holes of the movable bracket 3 so that the hooks are placed at the bottom of the movable bracket 3. The pull plate hooks 4 are steel rods, and the bottoms thereof are bent inwards 90° to form hook ends.

[0020] When in use, the staff installs the mobile bracket 3 on the manhole cover. As the jack 1 contracts, the plate hook 4 extends into the opening hole of the manhole cover, and then the plate hook 4 is rotated so that the hook end is rotated to buckle the manhole cover. After the installation is completed, the top plate 2 is extended by the movable end of the jack 1 to drive the plate hook 4 to move upward, thereby lifting the manhole cover, thereby achieving the purpose of lifting the manhole cover. After that, the load-bearing wheel 6 of the mobile bracket 3 moves the whole body together with the manhole cover, and the manhole cover can be moved out of the wellhead. When installing the manhole cover, just operate in reverse. The entire installation process is simple and easy to operate, and has good safety.

[0021] In a preferred embodiment, in order to improve the stability of the movement of the pull plate hook 4, the opener and closer also includes a pair of guide rods 7 and a movable sleeve 8 adapted to the guide rods 7. The movable sleeve 8 is fixed to both sides of the top plate 2 by welding. The upper end of the guide rod 7 is passed through the movable sleeve 8 and can move relative to the movable sleeve 8. The lower end of the guide rod 7 is fixed to the top of the movable bracket 3.

[0022] In order to adjust the distance between a pair of pull plate hooks 4, a waist-shaped hole 9 is provided in the circular hole channel on the top plate 2, and the pull plate hook 4 is fixed in the waist-shaped hole 9 by a nut 5. The distance between a pair of pull plate hooks 4 can be adjusted according to the distance of the opening hole on the manhole cover to be moved, and the purpose of adjustment is achieved through the waist-shaped hole 9 and the nut 5, which increases its applicability.

[0023] On the whole, through the cooperation of the jack 1, the top plate 2, the plate hook 4 and the mobile bracket 3, the hook of the plate hook 4 is extended into the opening hole of the manhole cover. By using the working principle of the jack 1, the top plate 2 drives the plate hook 4 to pry up the manhole cover, which has the advantages of saving time and effort. The method of prying up the manhole cover by the manhole cover opener and closeer changes the working method of the pipeline network inspection, from the original two people prying up the manhole cover with a crowbar to the combination of the jack 1 and the special frame. The manhole cover can be opened and moved by operating the jack 1, which reduces the work intensity. In the case of inconvenience for personnel to stand, one person can also pry up and move the manhole cover well, improving the safety of the staff's operation.

[0024] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A manhole cover opener and closer, characterized in that: It includes a jack, a top plate, a movable bracket and a pair of pull plate hooks, wherein the top plate is connected to the top of the jack, the movable bracket is connected to the bottom of the jack, one end of the pair of pull plate hooks is passed through the top plate and fixed by nuts, and the other end passes through the movable bracket so that the hooks are placed at the bottom of the movable bracket.

2. A manhole cover opener and closer according to claim 1, characterized in that: It also includes a pair of guide rods and movable sleeves adapted to the guide rods, the movable sleeves are fixed at both ends of the top plate, the upper ends of the guide rods are inserted into the movable sleeves and can move relative to the movable sleeves, and the lower ends of the guide rods are fixed on the top of the movable bracket.

3. A manhole cover opener and closer according to claim 2, characterized in that: The movable sleeve is fixed on both sides of the top plate by welding.

4. A manhole cover opener and closer according to claim 1, characterized in that: The movable end of the jack is connected to the top plate, and the fixed end of the jack is connected to the movable bracket. When the jack moves, the top plate moves upward or downward.

5. A manhole cover opener and closer according to claim 1, characterized in that: The top plate is provided with a waist-shaped hole, and the pull plate hook is fixed in the waist-shaped hole through a nut.

6. A manhole cover opener and closer according to claim 1, characterized in that: The bottom of the mobile bracket is connected with a load wheel.

7. A manhole cover opener and closer according to claim 1, characterized in that: The top plate and the movable bracket are both made of stainless steel.

8. The manhole cover opener and closer according to claim 1, characterized in that: A pair of pull plate hooks are symmetrically arranged.

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