Opening device for municipal well lid

Abstract

The utility model provides an opening device for a municipal manhole cover. The opening device comprises a base frame and a cover plate, the wedge-shaped pin is independently arranged on the outer side of the base frame and used for maintaining a gap between the well lid and a well body; the pinch bar is rotatably arranged on the base frame, and an embedded block and a lifting hook are arranged at the two long ends of the pinch bar respectively; the lifting rope roller is rotatably arranged on the base frame, a lifting rope is arranged on the lifting rope roller, and the lifting rope is connected with the end, close to the lifting hook, of the pinch bar. The device is simple to operate, time-saving and labor-saving, the construction limitation of prying a well lid by using reinforcing steel bars in the prior art is avoided, the working efficiency is improved, and meanwhile, the success rate of opening a nodular cast iron well lid which is relatively firm is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of manhole cover construction, in particular to an opening device for a municipal manhole cover. Background Art

[0002] Cast iron manhole covers are divided into ductile iron manhole covers and gray iron manhole covers. Generally speaking, for manhole covers of the same weight, the ductile iron manhole cover has stronger compressive capacity than the gray iron manhole cover. Therefore, ductile iron manhole covers are more widely used in municipal road projects.

[0003] When it is necessary to open an ordinary manhole cover during municipal maintenance, usually an operator uses a steel bar as a crowbar and opens the manhole cover by pressing down the high point of the crowbar. However, since the middle section of the crowbar is suspended and there is no fulcrum, it is easy to swing left and right, resulting in low efficiency and low opening success rate when using this method. In addition, when encountering a manhole cover such as a ductile iron manhole cover that generally has an elastic lock inside, the elastic lock makes the manhole cover fit tightly, and the prying force of the above method is not enough to open such manhole covers. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an opening device for a municipal manhole cover to solve the problems in the above background.

[0005] The technical solution of the utility model includes: an opening device for a municipal manhole cover, which comprises:

[0006] A base frame;

[0007] A wedge pin, which is independently disposed outside the base frame and is used to maintain the gap between the manhole cover and the well body;

[0008] A crowbar, which is rotatably disposed on the base frame, and its two long ends are respectively provided with an inlay block and a lifting hook;

[0009] A suspension rope roller, which is rotatably disposed on the base frame, and a suspension rope is provided on the suspension rope roller, and the suspension rope is connected to the end of the crowbar close to the lifting hook.

[0010] Preferably, the base frame includes a first bracket and a second bracket, which are respectively used to support the crowbar and the suspension rope roller, and the distance between the inlay block and the first bracket is less than the distance between the lifting hook and the first bracket.

[0011] Preferably, the first bracket includes inverted V-shaped legs correspondingly arranged on both sides of the crowbar, a first stabilizing plate located at the bottom end of the inverted V-shaped legs, and a rotating connection plate located at the top end of the inverted V-shaped legs. The crowbar is rotatably connected to the rotating connection plate through a first rotating shaft.

[0012] Preferably, the second bracket includes a U-shaped seat and a stabilizing plate 2 located at the bottom of the U-shaped seat, and both ends of the U-shaped seat are connected to the rope roller located therein through a second rotating shaft.

[0013] Preferably, a rocker arm is coaxially connected to the outer side of the rope roller, and the rocker arm drives the rope roller to rotate to retract and release the rope.

[0014] Preferably, the insert is wedge-shaped, and a plurality of anti-slip protrusions are provided on its top surface.

[0015] Preferably, a support rod is provided between the pry bar and the lifting hook, and the pry bar and the support rod are arranged in such a direction that when the insert block of the rotating pry bar is located at the lowest point, the support rod is in a horizontal state.

[0016] Preferably, the end of the lifting hook away from the pry bar is bent in a direction away from the base frame.

[0017] The beneficial effects of the utility model are: simple operation and time-saving and labor-saving, avoiding the construction limitations of using steel bars to pry the manhole cover in the prior art, improving work efficiency, and at the same time increasing the success rate of opening relatively tight manhole covers such as ductile iron manhole covers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of an embodiment of the utility model;

[0019] Figure 2 It is a top view of an embodiment of the utility model;

[0020] In the figure:

[0021] 1. Bracket 1; 1-1. Inverted V-shaped leg; 1-2. Stabilizing plate 1; 1-3. Transfer plate;

[0022] 2. Bracket 2; 2-1. U-shaped seat; 2-2. Stabilizing plate 2;

[0023] 3. Wedge pin;

[0024] 4. Pry bar;

[0025] 5. Embedded blocks;

[0026] 6. Lift the hook;

[0027] 7. Rope roller;

[0028] 8. Lifting rope;

[0029] 9. Rocker arm;

[0030] 10. Support and pressure rod;

[0031] 11. Rotating shaft 1;

[0032] 12. Second rotating shaft;

[0033] 13. Anti-slip bumps;

[0034] 14. Hoop. Detailed implementation manners

[0035] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0036] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0037] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0038] Refer to the attached Figure 1-2, An opening device for a municipal manhole cover, which includes: a base frame, a wedge pin 3, a pry bar 4, an inlay block 5, a lifting hook 6, a suspension rope roller 7, a suspension rope 8, and a rocker arm 9. The wedge pin 3 is independently disposed outside the base frame and is used to maintain the gap between the manhole cover and the well body; the pry bar 4 is rotatably disposed on the base frame, and inlay blocks 5 and lifting hooks 6 are respectively provided at the two long ends thereof; the suspension rope roller 7 is rotatably disposed on the base frame, a suspension rope 8 is provided on the suspension rope roller 7, and the suspension rope 8 is connected to the end of the pry bar 4 near the lifting hook 6; a rocker arm 9 is coaxially connected to the outside of the suspension rope roller 7, and the rocker arm 9 drives the suspension rope roller 7 to rotate to take in and release the suspension rope 8.

[0039] When it is necessary to open an ordinary manhole cover, lift the end of the pry bar 4 near the inlay block 5 by hand. At this time, the lifting hook 6 is at the lowest point. Connect the lifting hook 6 to the manhole cover, and then press down the end of the pry bar 4 near the inlay block 5 to open the manhole cover. With the assistance of the base, the pry bar 4 can rotate around a stable axis, avoiding the problem that when a person applies force to the pry bar 4, the pry bar 4 shakes randomly, reducing the force for opening the manhole cover and even causing the inability to open the manhole cover; when it is necessary to open a ductile iron manhole cover, rotate the pry bar 4 to lower the inlay block 5, connect the inlay block 5 to the manhole cover, rotate the rocker arm 9 to drive the end of the pry bar 4 near the inlay block 5 to rise, thereby increasing the gap between the manhole cover and the well body. Then, insert the wedge pin 3 into the gap between the manhole cover and the well body to maintain the gap between the manhole cover and the well body. Adjust the part of the pry bar 4 and the inlay block 5 extending into the gap to be longer for easier force application, and open the ductile iron manhole cover with a spring lock.

[0040] In this embodiment, the base frame includes a support bracket one 1 and a support bracket two 2, which are respectively used to support the pry bar 4 and the suspension rope roller 7. The distance between the inlay block 5 and the support bracket one 1 is less than the distance between the lifting hook 6 and the support bracket one 1, so as to save effort when opening the ductile iron manhole cover.

[0041] Among them, the support bracket one 1 includes inverted V-shaped legs 1-1 correspondingly arranged on both sides of the pry bar 4, a stabilizing plate one 1-2 located at the bottom of the inverted V-shaped legs 1-1, and a rotating connection plate 1-3 located at the top of the inverted V-shaped legs 1-1. The pry bar 4 is rotatably connected to the rotating connection plate 1-3 through a rotating shaft one 11; the support bracket two 2 includes a U-shaped seat 2-1 and a stabilizing plate two 2-2 located at the bottom of the U-shaped seat 2-1. Both ends of the U-shaped seat 2-1 are respectively connected to the suspension rope roller 7 located therein through a rotating shaft two 12.

[0042] In this embodiment, a supporting and pressing rod 10 is provided between the pry bar 4 and the lifting hook 6. The arrangement directions of the pry bar 4 and the supporting and pressing rod 10 are: when the inlay block 5 where the pry bar 4 rotates is at the lowest point, the supporting and pressing rod 10 is in a horizontal state. A suspension ring 14 is provided at the bottom of the supporting and pressing rod 10 for installing the suspension rope 8. During use, the supporting and pressing rod 10 can be pressed by hand, or the height of the inlay block 5 can be changed by taking in and releasing the suspension rope 8.

[0043] In this embodiment, the insert block 5 is wedge-shaped, and its cross-sectional dimension gradually decreases along the direction away from the pry bar 4, so that the insert block 5 with a smaller volume can be inserted into the clamping hole on the ductile iron manhole cover. In addition, a number of anti-slip bumps 13 are provided on the top surface of the insert block 5 to increase the friction force when prying the manhole cover and prevent the problem that the insert block 5 slips off due to the wetting of the bottom surface of the manhole cover. The end of the lifting hook 6 away from the pry bar 4 is bent in the direction away from the base frame to facilitate hooking the manhole cover.

[0044] The usage method of this device includes the steps:

[0045] Before use, check the structure of the device to ensure firm connection, stable installation and smooth operation, and place the device at the edge of the manhole cover;

[0046] When opening a ductile iron manhole cover: Insert the insert block 5 into the clamping groove of the ductile iron manhole cover; The staff stands on the stable plate two 2-2 with both feet, rotates the rocker arm 9 to drive the suspension rope roller 7 to rotate, and then tightens the suspension rope 8, so that the end of the pry bar 4 close to the suspension rope 8 descends and the end close to the insert block 5 ascends; When a small gap is opened in the ductile iron manhole cover, insert the wedge-shaped pin 3 into the gap, extend the insert block 5 and the pry bar 4 into the gap, and continue to rotate the rocker arm 9 to open the ductile iron manhole cover.

[0047] When opening a common manhole cover: Lift the end of the pry bar 4 close to the insert block 5 to lower the lifting hook 6, engage the lifting hook 6 with the common manhole cover, and press down the end of the pry bar 4 close to the insert block 5 to raise the lifting hook 6 to open the common manhole cover.

[0048] Compared with the prior art, the beneficial effects of the present utility model are as follows: The operation is simple, time-saving and labor-saving, avoiding the construction limitations of prying the manhole cover with steel bars in the prior art, improving work efficiency, and at the same time increasing the success rate of opening relatively tight manhole covers such as ductile iron manhole covers.

[0049] The above is the preferred embodiment of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model.

Claims

1. An opening device for a municipal manhole cover, characterized in that, include: Scaffolding; A wedge pin, the wedge pin is independently configured on the outside of the base frame and is used to maintain a gap between the manhole cover and the manhole body; A pry bar, the pry bar is rotatably arranged on the base frame, and two long ends of the pry bar are respectively provided with an insert and a lifting hook; A rope roller is rotatably arranged on the base frame, and a rope is arranged on the rope roller, and the rope is connected to the end of the pry bar close to the lifting hook.

2. The opening device for a municipal manhole cover according to claim 1, characterized in that, The base frame includes a first bracket and a second bracket, which are respectively used to support the pry bar and the rope roller, and the distance between the insert block and the first bracket is smaller than the distance between the lifting hook and the first bracket.

3. The opening device for a municipal well cover according to claim 2, characterized in that, The bracket 1 includes inverted V-shaped legs correspondingly arranged on both sides of the pry bar, a stabilizing plate 1 located at the bottom end of the inverted V-shaped legs, and a rotating connecting plate located at the top end of the inverted V-shaped legs. The pry bar is rotatably connected to the rotating connecting plate through a rotating shaft 1.

4. The opening device for a municipal well cover according to claim 2, characterized in that, The second bracket includes a U-shaped seat and a second stabilizing plate located at the bottom of the U-shaped seat. The two ends of the U-shaped seat are respectively connected to the rope roller located therein through a second rotating shaft.

5. The opening device for a municipal well cover according to claim 1, characterized in that, A rocker arm is coaxially connected to the outer side of the rope roller, and the rocker arm drives the rope roller to rotate to retract and release the rope.

6. The opening device for a municipal manhole cover according to claim 1, characterized in that, The embedding block is wedge-shaped, and a plurality of anti-slip convex points are arranged on the top surface thereof.

7. The opening device for a municipal well cover according to claim 1, characterized in that, A support rod is provided between the pry bar and the lifting hook, and the pry bar and the support rod are arranged in such a direction that when the insert block of the pry bar is located at the lowest point, the support rod is in a horizontal state.

8. The opening device for a municipal well cover according to claim 1, characterized in that, The end of the lifting hook away from the pry bar is bent in a direction away from the base frame.

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