Opening device for municipal well lid and using method

Abstract

The invention provides an opening device for a municipal manhole cover and a using method. The opening device comprises a base frame, a cover plate 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 easy to operate, saves time and labor, avoids the construction limitation that in the prior art, a well lid is pried through reinforcing steel bars, improves the working efficiency, and meanwhile improves the success rate of opening a nodular cast iron well lid and other tight well lids.

Description

Technical Field

[0001] The present invention relates to the technical field of manhole cover construction, and in particular to an opening device for a municipal manhole cover and a use method thereof. Background Art

[0002] Cast iron manhole covers are divided into ductile iron manhole covers and gray cast iron manhole covers. Generally speaking, ductile iron manhole covers of the same weight have stronger compressive resistance than gray iron manhole covers, so ductile iron manhole covers are more widely used in municipal road projects.

[0003] When municipal maintenance requires opening an ordinary manhole cover, an operator usually uses a steel bar as a crowbar to press down on the high point of the crowbar to open the manhole cover. However, since the middle of the crowbar is suspended in the air and has no fulcrum, it is easy to swing left and right, which leads to low efficiency and low success rate of opening. In addition, when encountering a ductile iron manhole cover, which is generally equipped with an elastic lock inside, the elastic lock causes the manhole cover to close tightly, and the prying force of the above method is not enough to open such a manhole cover. Summary of the invention

[0004] The object of the present invention is to provide an opening device for a municipal manhole cover and a method of use to solve the problems in the above background.

[0005] The first object of the present invention is to provide: an opening device for a municipal manhole cover, comprising:

[0006] Scaffolding;

[0007] 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;

[0008] 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;

[0009] 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.

[0010] Preferably, the base frame includes a bracket 1 and a bracket 2, which are respectively used to support the pry bar and the rope roller, and the distance between the insert and the bracket 1 is smaller than the distance between the lifting hook and the bracket 1.

[0011] Preferably, 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 transfer plate located at the top end of the inverted V-shaped legs, and the pry bar is rotatably connected to the transfer plate via a rotating shaft 1.

[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] Another object of the present invention is to provide a method for using the above-mentioned opening device for a municipal manhole cover, which comprises the steps of:

[0018] Place the opening device on the edge of the manhole cover;

[0019] When opening the ductile iron manhole cover: insert the insert into the slot of the ductile iron manhole cover, rotate the rocker arm to drive the rope roller to rotate, tighten the rope, and make the pry bar rise close to the end of the insert; when the ductile iron manhole cover is opened with a gap, insert the wedge pin into the gap, extend the insert and the pry bar into the gap, and continue to rotate the rocker arm to open the ductile iron manhole cover;

[0020] When opening an ordinary manhole cover: engage the lifting hook with the ordinary manhole cover, press down the end of the pry bar close to the insert block to raise the lifting hook to open the ordinary manhole cover.

[0021] The beneficial effects of the present invention 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

[0022] Figure 1 is a front view of an embodiment of the present invention;

[0023] Figure 2 is a top view of an embodiment of the present invention;

[0024] In the figure:

[0025] 1. Bracket 1; 1-1. Inverted V-shaped leg; 1-2. Stabilizing plate 1; 1-3. Transfer plate;

[0026] 2. Bracket 2; 2-1. U-shaped seat; 2-2. Stabilizing plate 2;

[0027] 3. Wedge pin;

[0028] 4. Pry bar;

[0029] 5. Embedded blocks;

[0030] 6. Lift the hook;

[0031] 7. Rope roller;

[0032] 8. Lifting rope;

[0033] 9. Rocker arm;

[0034] 10. Support and pressure rod;

[0035] 11. Rotating shaft 1;

[0036] 12. Rotating shaft 2;

[0037] 13. Anti-slip bumps;

[0038] 14. Rings. DETAILED DESCRIPTION

[0039] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solution of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0042] Reference Figure 1-2 , an opening device for a municipal manhole cover, comprising: a base frame, a wedge pin 3, a pry bar 4, an insert 5, a lifting hook 6, a rope roller 7, a lifting rope 8 and a rocker arm 9. The wedge pin 3 is independently arranged on the outside of the base frame, and is used to maintain the gap between the manhole cover and the manhole body; the pry bar 4 is rotatably arranged on the base frame, and its two long ends are respectively provided with an insert 5 and a lifting hook 6; the rope roller 7 is rotatably arranged on the base frame, and the rope roller 7 is provided with a lifting rope 8, and the lifting rope 8 is connected to the end of the pry bar 4 near the lifting hook 6; the outer side of the rope roller 7 is coaxially connected with a rocker arm 9, and the rocker arm 9 drives the rope roller 7 to rotate to retract and release the rope 8.

[0043] When it is necessary to open the ordinary manhole cover, lift the end of the pry bar 4 close to the insert block 5 by hand. At this time, the lifting hook 6 is at a lower point, the lifting hook 6 is engaged with the manhole cover, and then the end of the pry bar 4 close to the insert block 5 is pressed down to open the manhole cover. With the assistance of the base, the pry bar 4 can rotate with a stable shaft to avoid the pry bar 4 shaking when people apply force to the pry bar 4, which reduces the force for opening the manhole cover and leads to the problem that the manhole cover cannot be opened; when it is necessary to open the ductile iron manhole cover, rotate the pry bar 4 to lower the insert block 5, engage the insert block 5 with the manhole cover, rotate the rocker arm 9 to drive the end of the pry bar 4 close to the insert block 5 to rise, thereby increasing the gap between the manhole cover and the well body, and 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 insert block 5 extending into the gap to be longer, so as to facilitate the application of force and open the ductile iron manhole cover with a spring lock.

[0044] In this embodiment, the base frame includes a bracket 1 and a bracket 2, which are used to support a pry bar 4 and a rope roller 7 respectively. The distance between the block 5 and the bracket 1 is smaller than the distance between the lifting hook 6 and the bracket 1, so as to save effort when opening the ductile iron manhole cover.

[0045] Among them, bracket 1 includes an inverted V-shaped leg 1-1 correspondingly arranged on both sides of the pry bar 4, a stabilizing plate 1-2 located at the bottom end of the inverted V-shaped leg 1-1, and a transfer plate 1-3 located at the top end of the inverted V-shaped leg 1-1, and the pry bar 4 is rotatably connected to the transfer plate 1-3 through a rotating shaft 11; bracket 2 includes a U-shaped seat 2-1 and a stabilizing plate 2-2 located at the bottom of the U-shaped seat 2-1, and the two ends of the U-shaped seat 2-1 are respectively connected to the rope roller 7 located therein through a rotating shaft 12.

[0046] In this embodiment, a support rod 10 is provided between the pry bar 4 and the lifting hook 6. The pry bar 4 and the support rod 10 are arranged in such a direction that when the insert block 5 rotated by the pry bar 4 is at the lowest point, the support rod 10 is in a horizontal state. A lifting ring 14 is provided at the bottom of the support rod 10 for installing the lifting rope 8. When in use, the support rod 10 can be pressed manually, or the height of the insert block 5 can be changed by retracting and releasing the lifting rope 8.

[0047] In this embodiment, the insert 5 is wedge-shaped, and its cross-sectional size gradually decreases in the direction away from the pry bar 4, so that the smaller insert 5 can be inserted into the clamping hole on the ductile iron manhole cover. In addition, the top surface of the insert 5 is provided with a plurality of anti-skid protrusions 13 to increase the friction when prying the manhole cover and prevent the insert 5 from slipping 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 the hooking of the manhole cover.

[0048] The method for using the device comprises the steps of:

[0049] Before use, perform a structural inspection of the device to ensure that it is securely connected, securely installed, and operates smoothly, and place the device on the edge of the manhole cover;

[0050] When opening the ductile iron manhole cover: insert the insert 5 into the slot of the ductile iron manhole cover; the staff stands on the stabilizing plate 2-2 with both feet, rotates the rocker arm 9, drives the rope roller 7 to rotate, and then tightens the rope 8, so that the end of the pry bar 4 close to the rope 8 descends, and the end close to the insert 5 rises; when the ductile iron manhole cover is opened to a small gap, insert the wedge pin 3 into the gap, extend the insert 5 and the pry bar 4 into the gap, and continue to rotate the rocker arm 9 to open the ductile iron manhole cover.

[0051] When opening the ordinary manhole cover: lift the end of the pry bar 4 close to the insert block 5 to lower the lifting hook 6, and engage the lifting hook 6 with the ordinary manhole cover, press down the end of the pry bar 4 close to the insert block 5 to raise the lifting hook 6 to open the ordinary manhole cover.

[0052] Compared with the prior art, the beneficial effects of the present invention are: simple operation and time-saving and labor-saving, avoiding the construction limitations of the prior art of using steel bars to pry the manhole cover, improving work efficiency, and at the same time increasing the success rate of opening relatively tight manhole covers such as ductile iron manhole covers.

[0053] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

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 manhole 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 manhole 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 manhole 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 manhole 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 manhole 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.

9. A method for using the opening device for a municipal manhole cover according to any one of claims 1 to 8, characterized in that: Includes steps: Place the opening device on the edge of the manhole cover; When opening the ductile iron manhole cover: insert the insert into the slot of the ductile iron manhole cover, rotate the rocker arm to drive the rope roller to rotate, tighten the rope, and make the pry bar rise close to the end of the insert; when the ductile iron manhole cover is opened with a gap, insert the wedge pin into the gap, extend the insert and the pry bar into the gap, and continue to rotate the rocker arm to open the ductile iron manhole cover; When opening an ordinary manhole cover: engage the lifting hook with the ordinary manhole cover, press down the end of the pry bar close to the insert block to raise the lifting hook to open the ordinary manhole cover.

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