A device for assisting in the opening of a manhole cover

Abstract

The application belongs to the technical field of well lid opening, and particularly relates to an auxiliary well lid opening device, which comprises a moving bottom plate, a supporting top plate and a crowbar structure. Both sides of the top of the moving bottom plate are fixedly connected with stand columns, the supporting top plate is fixedly installed at the top end of the stand columns, an adjusting rail is slidingly installed between the stand columns on the two sides, and the adjusting rail is driven to move up and down by a driving mechanism. In the utility model, the electric push rod works, drives the adjusting rail to move downwards, makes the lower end of the crowbar structure inserted into the air hole on the well lid, moves the storage hole to the lower side of the well lid, pulls the operating ring upwards, makes the blocking strip move upwards, removes the blocking of the unfolding plate, further makes the unfolding plate rotate to the outside of the storage hole under the elastic force of the torsional spring, and then the electric push rod drives the crowbar structure to move upwards, so that the crowbar structure lifts the well lid upwards to assist the opening of the well lid. This mode can be applied to different sizes of air holes.

Description

Technical Field

[0001] This utility model relates to a manhole cover opening tool, specifically to a device that assists in opening manhole covers. Background Technology

[0002] Manhole covers are common facilities on municipal roads, used to cover the access points of urban infrastructure such as water pipes and fiber optic cables to prevent people or objects from falling into the manholes. One type of cover has two keyholes, symmetrically located on either side of the manhole cover's centerline, with the length of the keyholes running radially along the cover. Opening this type of cover requires inserting a crowbar or hook into the keyholes to pry or hook the cover up. During this process, if the cover slips off the crowbar or hook, it poses a danger to workers. Therefore, auxiliary tools are needed to assist in opening manhole covers.

[0003] Due to the diversity of manhole covers, the size of the vent holes on them varies, and the dimensions of the manhole covers also differ, resulting in inconsistent spacing between the two vent holes. This leads to significant limitations in the actual operation of existing auxiliary tools. Utility Model Content

[0004] The main objective of this disclosure is to provide a device for assisting in opening manhole covers, so as to effectively solve the problems raised by the inventors in the above-mentioned background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A device for assisting in opening a manhole cover includes a movable base plate, a supporting top plate, and a crowbar structure. Columns are fixedly connected to both sides of the top of the movable base plate. The supporting top plate is fixedly installed on the top of the columns. An adjusting rail is slidably installed between the columns on both sides, and the adjusting rail is driven up and down by a drive mechanism. Two sliding seats with opposite directions of movement are slidably installed on the adjusting rail. A crowbar structure is fixedly connected to each of the two sliding seats. A moving opening is provided on the movable base plate, and the lower end of the crowbar structure movably passes through the moving opening. Several self-locking wheels are installed at the bottom of the movable base plate.

[0007] Preferably, the portion of the pry bar structure located below the moving opening has a storage hole, and two symmetrically arranged rotating shafts are rotatably installed in the storage hole. Each rotating shaft is fixedly installed with an unfolding plate, and the length of the unfolding plate is greater than the length of the storage hole.

[0008] Preferably, one of the rotating shafts has a torsion spring fitted at its end, and the two ends of the torsion spring are respectively fixedly connected to the inner wall of the unfolding plate and the receiving hole. Both rotating shafts are fixedly mounted with circular gears, and the two circular gears mesh with each other.

[0009] Preferably, a stop bar is slidably installed inside the crowbar structure, the bottom end of the stop bar extends into the storage hole, one side of the unfolding plate contacts the side of the stop bar, and the top end of the stop bar is located outside the crowbar structure and is fixedly connected to an operating ring.

[0010] Preferably, the driving mechanism is an electric push rod, which is fixedly mounted on the support top plate, and the output end of the electric push rod is fixedly connected to the top of the adjustment rail.

[0011] Preferably, the adjusting rail has two symmetrically arranged square guide rails, and the two sliding seats are slidably installed in the two square guide rails respectively. A bidirectional lead screw is rotatably installed between the two square guide rails, and the two sliding seats are threaded onto the bidirectional lead screw at opposite threads. The right end of the bidirectional lead screw extends to the outside of the adjusting rail and is fixedly connected to a quick-access handle.

[0012] In view of this, compared with the prior art, the beneficial effects of this utility model are:

[0013] (i) In this application, the electric push rod operates, which drives the adjustment rail to move downward, so that the lower end of the crowbar structure is inserted into the vent hole on the manhole cover until the receiving hole moves to the bottom of the manhole cover. Then, the operating ring is pulled upward, so that the stop bar moves upward until it is released from the obstruction of the unfolding plate. Then, under the elastic force of the torsion spring, the unfolding plate is rotated to the outside of the receiving hole. The electric push rod then drives the crowbar structure to move upward, so that the crowbar structure lifts the manhole cover upward to assist in opening the manhole cover. This method can be applied to vent holes of different sizes.

[0014] (ii) In this application, before operation, the quick-release handle is turned to rotate the two-way lead screw, and then the two sliding seats move towards or away from each other, so that the distance between the two pry bar structures changes to adapt to manhole covers of different sizes. Attached Figure Description

[0015] Figure 1 The diagram shown is a schematic diagram of the auxiliary manhole cover opening device provided by this utility model;

[0016] Figure 2 As shown Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 As shown Figure 2 A schematic diagram showing the central unfolding panel rotated out of the storage hole.

[0018] icon:

[0019] 1-Moving base plate; 101-Moving opening; 2-Column; 3-Supporting top plate; 4-Adjusting rail; 401-Square guide rail; 402-Two-way lead screw; 403-Quick move handle; 5-Sliding seat; 6-Pry bar structure; 601-Storage hole; 602-Rotating shaft; 603-Expanding plate; 604-Torsion spring; 605-Stop bar; 606-Operating ring; 607-Circular gear; 7-Electric push rod; 8-Self-locking traveling wheel. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-3 The present invention provides the following embodiments:

[0022] A device for assisting in opening a manhole cover includes a movable base plate 1, a supporting top plate 3, and a crowbar structure 6. Columns 2 are fixedly connected to both sides of the top of the movable base plate 1. The supporting top plate 3 is fixedly installed on the top of the columns 2. An adjusting rail 4 is slidably installed between the two columns 2, and the adjusting rail 4 is driven up and down by a drive mechanism, which is an electric push rod 7. The electric push rod 7 is fixedly installed on the supporting top plate 3, and its output end is fixedly connected to the top of the adjusting rail 4. Two sliding seats 5 with opposite directions of movement are slidably installed on the adjusting rail 4. A crowbar structure 6 is fixedly connected to each of the two sliding seats 5. A moving opening 101 is provided on the movable base plate 1, and the lower end of the crowbar structure 6 movably passes through the moving opening 101. Several self-locking wheels 8 are installed at the bottom of the movable base plate 1.

[0023] Specifically, the part of the crowbar structure 6 located below the moving port 101 has a storage hole 601. Two symmetrically arranged rotating shafts 602 are rotatably installed in the storage hole 601. Each rotating shaft 602 is fixedly installed with an unfolding plate 603, and the length of the unfolding plate 603 is greater than the length of the storage hole 601.

[0024] Specifically, a torsion spring 604 is fitted to the end of one of the rotating shafts 602. The two ends of the torsion spring 604 are fixedly connected to the unfolding plate 603 and the inner wall of the storage hole 601, respectively. Circular gears 607 are fixedly installed on both rotating shafts 602, and the two circular gears 607 mesh with each other. A stop bar 605 is slidably installed inside the pry bar structure 6. The bottom end of the stop bar 605 extends into the storage hole 601. The side of one of the unfolding plates 603 contacts the side of the stop bar 605. At this time, the torsion spring 604 is under force, while the stop bar 605 hinders the movement of the unfolding plate 603. The top end of the stop bar 605 is located outside the pry bar structure 6 and is fixedly connected to an operating ring 606.

[0025] Specifically, the adjusting rail 4 has two symmetrically arranged square guide rails 401, and two sliding seats 5 are slidably installed in the two square guide rails 401 respectively. A bidirectional lead screw 402 is rotatably installed between the two square guide rails 401. The two sliding seats 5 are threaded on the bidirectional lead screw 402 at opposite threads. The right end of the bidirectional lead screw 402 extends to the outside of the adjusting rail 4 and is fixedly connected to a quick-traverse handle 403.

[0026] The specific implementation method of this embodiment is as follows: The device is moved above the manhole cover, the electric push rod 7 operates, which drives the adjusting rail 4 downwards, causing the lower end of the pry bar structure 6 to insert into the vent hole on the manhole cover until the receiving hole 601 moves below the manhole cover. Then, the operating ring 606 is pulled upwards, causing the stop bar 605 to move upwards until it releases the obstruction on the unfolding plate 603. Then, under the elastic force of the torsion spring 604, the unfolding plate 603 rotates outside the receiving hole 601 (e.g., ...). Figure 2 and 3 As shown, from moving from a vertical state to a horizontal state, the meshing action of the circular gear 607 enables the two unfolding plates 603 to move synchronously. The electric push rod 7 then drives the crowbar structure 6 to move upward, so that the crowbar structure 6 lifts the manhole cover upward to assist in opening the manhole cover. This method can be applied to ventilation holes of different sizes.

[0027] Before operation, turn the quick-release handle 403 to rotate the two-way lead screw 402, and then the two sliding seats 5 move towards or away from each other, changing the distance between the two pry bar structures 6 to fit different sizes of manhole covers.

[0028] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A device for assisting in opening manhole covers, characterized in that: The device includes a movable base plate (1), a supporting top plate (3), and a crowbar structure (6). The movable base plate (1) has columns (2) fixedly connected to both sides of its top. The supporting top plate (3) is fixedly installed on the top of the columns (2). An adjusting rail (4) is slidably installed between the columns (2) on both sides. The adjusting rail (4) is driven up and down by a driving mechanism. Two sliding seats (5) with opposite directions of movement are slidably installed on the adjusting rail (4). A crowbar structure (6) is fixedly connected to each of the two sliding seats (5). The movable base plate (1) has a moving opening (101), and the lower end of the crowbar structure (6) moves through the moving opening (101). Several self-locking wheels (8) are installed at the bottom of the movable base plate (1).

2. The device for assisting in opening a manhole cover according to claim 1, characterized in that: The pry bar structure (6) has a storage hole (601) in the part below the moving port (101). Two symmetrically arranged rotating shafts (602) are rotatably installed in the storage hole (601). Each rotating shaft (602) is fixedly installed with an unfolding plate (603), and the length of the unfolding plate (603) is greater than the length of the storage hole (601).

3. The device for assisting in opening a manhole cover according to claim 2, characterized in that: One of the rotating shafts (602) has a torsion spring (604) fitted at its end. The two ends of the torsion spring (604) are fixedly connected to the unfolding plate (603) and the inner wall of the storage hole (601), respectively. Both rotating shafts (602) are fixedly mounted with circular gears (607), and the two circular gears (607) mesh with each other.

4. The device for assisting in opening a manhole cover according to claim 3, characterized in that: A stop bar (605) is slidably installed inside the crowbar structure (6). The bottom end of the stop bar (605) extends into the storage hole (601). The side of one of the unfolding plates (603) contacts the side of the stop bar (605). The top end of the stop bar (605) is located outside the crowbar structure (6) and is fixedly connected to an operating ring (606).

5. The device for assisting in opening a manhole cover according to claim 4, characterized in that: The driving mechanism is an electric push rod (7), which is fixedly installed on the supporting top plate (3), and the output end of the electric push rod (7) is fixedly connected to the top of the adjusting rail (4).

6. The device for assisting in opening a manhole cover according to claim 5, characterized in that: The adjustment rail (4) has two symmetrically arranged square guide rails (401). The two sliding seats (5) are slidably installed in the two square guide rails (401). A bidirectional lead screw (402) is rotatably installed between the two square guide rails (401). The two sliding seats (5) are threaded on the bidirectional lead screw (402) at the threads with opposite directions. The right end of the bidirectional lead screw (402) extends to the outside of the adjustment rail (4) and is fixedly connected to a quick-release handle (403).

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