A cover opening tool for a manhole

Abstract

The utility model discloses a kind of well lid opening tool, it is related to the technical field of sewage well maintenance tool, specifically including effort lever, hydraulic jack and the foot pad of installation in the tail end of effort lever, the middle part of effort lever is equipped with upper and lower through screw hole, pulling rod is screwed in screw hole, effort lever is close to tail end Two sides of symmetrical shape each install a set of spread arm assembly on two sets of spread arm assembly, detachable lifting assembly is all installed on two sets of spread arm assembly.The utility model whole adopts lever principle design, can be suitable for the hinge flip type well lid of single hanging hole and the opening operation of symmetrical double hanging hole down-pressing type well lid, and adjustable flexible installation design using lifting assembly on spread arm assembly, so that the tool can adapt to the lifting operation of multiple models of double hanging hole well lid, whole tool operation, simple and convenient, time-saving and labor-saving, can effectively solve the problem of well lid opening difficult caused by well lid corrosion or jamming etc.

Description

Technical Field

[0001] This utility model belongs to the technical field of sewage well maintenance tools, specifically relating to a manhole cover opening tool. Background Technology

[0002] The maintenance of roads, buildings, and facilities within factory areas or communities is generally carried out by the relevant management units or professional personnel within the area. In addition to road maintenance, the maintenance and repair of road drainage and sewage wells are also of paramount importance. As we all know, the covers of drainage or sewage wells are currently made of cast iron. Over time, they are exposed to wind, sun, rain, and silt erosion, which can easily cause them to rust or become stuck. Combined with their considerable weight, ordinary hooks are unlikely to open these rusted or stuck well covers, which is both time-consuming and laborious.

[0003] Therefore, we propose a manhole cover opening tool that is easy to operate and can be adapted to different models of manhole covers. Utility Model Content

[0004] The purpose of this utility model is to provide a manhole cover opening tool to solve the above-mentioned problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A manhole cover opening tool includes a force-applying lever, a hydraulic jack, and a pad installed at the tail end of the force-applying lever. The force-applying lever has a threaded hole that runs through the upper and lower parts in the middle. A pull rod is screwed into the threaded hole. A set of extended arm assemblies is symmetrically installed on both sides of the force-applying lever near the tail end. A detachable lifting assembly is installed on both sets of extended arm assemblies.

[0006] Furthermore, the force-applying lever is made of T-shaped steel as the main body, and a horizontal steel plate is welded to the tail end of the T-shaped steel as a carrier plate, so that the tail end of the T-shaped steel is in the shape of an "I". The "I" shaped structure area formed by the tail end of the force-applying lever and the carrier plate is symmetrically provided with pin holes for installing the arm assembly.

[0007] Furthermore, each of the "I"-shaped structural areas formed by the tail end of the force-applying lever and the carrier plate is provided with a set of positioning holes, and a U-shaped positioning pin for positioning the arm assembly is movably inserted into one of the positioning holes.

[0008] Furthermore, the arm extension assembly includes an arm extension body and a pin. The tail end of the arm extension body is provided with a hole for the pin to pass through, and the tail end of the arm extension body is rotatably mounted on the side of the force-applying lever through the cooperation of the pin and the insertion hole. The rear part of the tail end of the arm extension body is integrally formed with a limiting top block that abuts against the force-applying lever, and the maximum angle of the arm extension body is 30-45 degrees.

[0009] Furthermore, the bottom of the arm body is provided with mounting holes for installing lifting components at equal intervals along the length of the arm body, while the top of the arm body is provided with hanging holes for fixing lifting components at equal intervals along the length of the arm body.

[0010] Furthermore, the pull rod and the pad are designed to be parallel, and the pad is installed vertically at the end of the force-applying lever.

[0011] Furthermore, the pull rod includes a threaded rod that is threaded into a threaded hole and extends through the threaded hole to the bottom end of the force-applying lever, and a first pull head is hinged to the bottom end of the threaded rod.

[0012] Furthermore, the first pull head includes a first U-shaped locking head hinged to the bottom end of the threaded rod and a T-shaped lifting head integrally formed at the bottom of the first U-shaped locking head.

[0013] Furthermore, the lifting assembly includes a chain; a second U-shaped lock head is installed at the top of the chain, and a second pull head with the same structure as the first pull head is installed at the bottom of the chain; the second U-shaped lock head is detachably installed in the mounting hole via a pin.

[0014] Furthermore, a groove is provided at the bottom of the force-applying lever near the front end for limiting the hydraulic jack; a strap is provided at the bottom of the "I"-shaped structure area formed by the tail end of the force-applying lever and the carrier plate for binding the hydraulic jack.

[0015] Furthermore, a horizontally positioned handle is welded to the front end of the force-applying lever, while two rubber wheels are symmetrically mounted on the side of the foot away from the handle via a bracket.

[0016] Beneficial effects: This utility model adopts a lever principle design, utilizing a hydraulic jack in conjunction with a force-applying lever, a foot pad, a pull rod, and an extendable arm assembly that can expand to both sides. This allows the device to be used for opening hinged flip-type manhole covers with a single lifting hole and symmetrical double-lifting-hole downward-pressing manhole covers. Furthermore, the adjustable and flexible installation design of the lifting assembly on the extendable arm assembly allows the tool to adapt to the lifting operation of various models of double-lifting-hole manhole covers. The entire tool is simple, convenient, time-saving, and labor-saving to operate, and can effectively solve the problem of difficulty in opening manhole covers caused by corrosion or jamming. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the disassembled structure of this utility model; Figure 4 This is a schematic diagram of the pull-out head structure of this utility model; Figure 5 This is a schematic diagram of the lifting component in this utility model.

[0018] In the diagram: 1. Force-applying lever; 101. Pin hole; 102. Positioning hole; 2. Threaded hole; 3. Pulling rod; 301. Threaded rod; 302. First pulling head; 321. First U-shaped lock head; 322. Lifting head; 4. Foot pad; 5. Rubber wheel; 6. Extending arm assembly; 601. Extending arm body; 602. Pin shaft; 603. Mounting hole; 604. Hanging hole; 7. Lifting assembly; 701. Chain; 702. Second U-shaped lock head; 703. Second pulling head; 8. Positioning pin; 9. Strap; 10. Hydraulic jack. Detailed Implementation

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0020] Example: To address the problem of manhole covers in drainage or sewage wells becoming rusted or jammed due to long-term exposure to wind, sun, rain, and silt, making it difficult to open such covers with ordinary hooks, we propose an easy-to-use manhole cover opening tool that can be adapted to different models of manhole covers. The specific solution is as follows: like Figures 1-2 As shown, this embodiment provides a manhole cover opening tool, which specifically includes a force-applying lever 1, a hydraulic jack 10, and a pad 4 installed at the tail end of the force-applying lever 1. The bottom of the pad 4 is equipped with a rubber pad, which serves to prevent slipping and protect the force-bearing surface (ground or manhole cover surface) at the fulcrum position.

[0021] The lever 1 is provided with a threaded hole 2 that runs through the top and bottom. A pull rod 3 is screwed into the threaded hole 2 to fit the single lifting hole on the flip-type manhole cover. The pull rod 3 and the pad 4 are designed to be parallel. The pad 4 is installed vertically at the tail end of the lever 1. A set of extended arm assemblies 6 are symmetrically installed on both sides of the lever 1 near the tail end. A detachable lifting assembly 7 is installed on both sets of extended arm assemblies 6 to fit the double lifting holes that are symmetrically arranged on both sides of the top of the press-down manhole cover.

[0022] In this embodiment, as Figure 3 As shown, in order to make the force-applying lever 1 have sufficient bending strength, the force-applying lever 1 is made of T-shaped steel as the main body, and a horizontal steel plate is welded to the tail end of the T-shaped steel as a carrier plate, so that the tail end of the T-shaped steel is in the shape of "I". At the same time, the "I" shaped structure formed by the carrier plate at the tail end of the force-applying lever 1 is symmetrically provided with pin holes 101 for installing the extension arm assembly 6.

[0023] In this embodiment, in order to position the unfolding component in both unfolded and closed states to facilitate the movement and use of the entire opening tool, a set of positioning holes 102 are provided at each position of the "I"-shaped structure area formed by the force lever 1 and the carrier plate. A U-shaped positioning pin 8 for positioning the arm assembly 6 is movably inserted into one of the positioning holes 102. When the unfolding component is fully unfolded, the positioning pin 8 is inserted into the positioning hole 102 near the tail end of the force lever 1 to prevent the arm assembly 6 from closing. When the arm assembly 6 is closed, the positioning pin 8 is inserted into the positioning hole 102 near the middle position of the force lever 1 to lock the arm assembly 6 in the gap between the positioning pin 8 and the force lever 1 to prevent the arm assembly 6 from unfolding.

[0024] In this embodiment, as Figure 3As shown, to enable the cover-opening tool to adapt to symmetrical double-hole press-down manhole covers of different sizes and models, its extension arm assembly 6 specifically includes an extension arm body 601 and a pin 602. The tail end of the extension arm body 601 has a hole for the pin 602 to pass through, and the tail end of the extension arm body 601 is rotatably mounted on the side of the force-applying lever 1 through the engagement of the pin 602 and the insertion hole 101. To prevent the extension arm assembly 6 from over-rotating, a limiting top block that abuts against the force-applying lever 1 is integrally formed at the tail end of the extension arm body 601, near the rear side. The maximum unfolding angle of the extension arm body 601 is 30-45 degrees, allowing the two sets of extension arm assemblies to... 6. When unfolded, the arm body 601 is kept at an angle of 60-90 degrees to prevent excessive rotation of the arm body 601, which would cause the lever effect to fail. In addition, it should be further explained that in order to ensure that the arm body 601 can always maintain a synchronous angle with one end of the force-applying lever 1 and maintain an effective lifting effect on the manhole cover, the arm body 601 is designed as a long strip of steel plate. Moreover, the tail end of the arm body 601 is installed on the side of the force-applying lever 1 through the pin 602 and can only rotate around the pin 602. In addition, in order to ensure that the pin 602 has sufficient bending strength, the pin 602 is preferably a steel bar structure with a diameter of 10-15 mm.

[0025] In this embodiment, mounting holes 603 for mounting the lifting assembly 7 are evenly spaced at the bottom of the boom body 601 along its length, while hanging holes 604 for fixing the lifting assembly 7 are evenly spaced at the top of the boom body 601 along its length. Figure 5 As shown, the lifting assembly 7 includes a chain 701; a second U-shaped lock head 702 is installed at the top of the chain 701, and a second pull head 703 with the same structure as the first pull head 302 is installed at the bottom of the chain 701; the second U-shaped lock head 702 is detachably installed in the mounting hole 603 by means of a pin. The operator can install the lifting assembly 7 in the corresponding mounting hole 603 according to the actual operation requirements, thereby adjusting the span between the two lifting assemblies 7. Moreover, with the flexibility of the chain 701, the lifting assembly 7 has more flexible operation. When the extension arm assembly 6 is closed, the second pull head 703 at the bottom of the lifting assembly 7 can be hung in the hanging hole 604 to prevent the opening tool from being dragged on the ground when moving.

[0026] In this embodiment, as Figure 3As shown, in order to connect smoothly with the lifting hole on the manhole cover, the pull rod 3 specifically includes a threaded rod 301 that is threaded into the threaded hole 2 and extends through the threaded hole 2 to the bottom end of the force lever 1. The bottom end of the threaded rod 301 is hinged to a first pull head 302. The first pull head 302 includes a first U-shaped locking head 321 that is hinged to the bottom end of the threaded rod 301 and a T-shaped lifting head 322 integrally formed at the bottom of the first U-shaped locking head 321. When the T-shaped lifting head 322 is inserted into the lifting hole of the manhole cover, it is rotated 90 degrees so that it is locked in the lifting hole at the top of the manhole cover, thus completing the assembly between the manhole cover and the pull head.

[0027] In addition, an operating handle is welded to the top of the threaded rod 301. The height and direction of the first pulling head 302 can be adjusted by rotating the threaded rod 301, so that the operator can operate the tool flexibly according to the needs of the site.

[0028] In this embodiment, a groove is provided at the bottom of the force lever 1 near the front end to limit the hydraulic jack 10. When in use, the top of the hydraulic jack 10 rests in the groove, which can play a role in preventing slippage. In addition, in order to facilitate the transfer of the cover opening tool, a strap 9 is provided at the bottom of the "I"-shaped structure area formed by the force lever 1 and the carrier plate to bind the hydraulic jack 10. When moving the cover opening tool, the hydraulic jack 10 can be bound to the bottom of the force lever 1 near the tail end by the strap 9.

[0029] In this embodiment, as Figures 1-3 As shown, to facilitate the movement of the tool, a horizontal handle is welded to the front end of the force-applying lever 1, and two rubber wheels 5 are symmetrically installed on the bottom of the foot 4 away from the handle via a bracket. When moving the tool, the operator attaches the hydraulic jack 10 to the bottom of the force-applying lever 1 near the tail end via a strap 9, and then lifts the handle to raise one end of the entire force-applying lever 1, so that the rubber wheels 5 contact the ground and the foot 4 leaves the ground. Since the extension arm assembly 6, the foot 4, and the hydraulic jack 10 are all located near the tail end of the force-applying lever 1, the center of gravity is biased towards the rubber wheels 5 when dragging the entire tool forward, so it is easier to drag.

[0030] During use, this cover-opening tool connects the corresponding pull head to the corresponding lifting hole on the manhole cover according to actual needs. Then, the hydraulic jack 10 is placed at the corresponding position at the bottom front end of the force-applying lever 1, and the hydraulic jack 10 is operated to lift the front end of the force-applying lever 1. During this process, the pad 4 is pressed on the surface of the manhole cover or the ground (when the pad 4 is pressed on the surface of the manhole cover, it is suitable for flip-type single lifting hole manhole covers, at which time the force fulcrum of the force-applying lever 1 is transferred to the hinge of the flip-type manhole cover; when the pad 4 is pressed on the ground, it is suitable for symmetrical double lifting hole downward pressing manhole covers, and the force fulcrum of the force-applying lever 1 is at the bottom of the pad 4). As the hydraulic jack 10 continues to push one end of the force-applying lever 1 to lift, the pull head can lift the rusted or jammed manhole cover, thereby achieving the function of lifting and opening the cover.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A manhole cover opening tool, comprising a force-applying lever (1), a hydraulic jack (10), and a pad (4) installed at the tail end of the force-applying lever (1), characterized in that, The force-applying lever (1) has a threaded hole (2) that runs through the upper and lower parts in the middle. A pull rod (3) is screwed into the threaded hole (2). A set of extended arm assemblies (6) are symmetrically installed on both sides of the force-applying lever (1) near the tail end. A detachable lifting assembly (7) is installed on both sets of extended arm assemblies (6).

2. The manhole cover opening tool according to claim 1, characterized in that, The force-applying lever (1) is made of T-shaped steel as the main body. A horizontal steel plate is welded to the tail end of the T-shaped steel as a carrier plate, so that the tail end of the T-shaped steel is in the shape of an "I". The "I" shaped structure formed by the tail end of the force-applying lever (1) and the carrier plate is symmetrically provided with a pin hole (101) for installing the boom assembly (6).

3. A manhole cover opening tool according to claim 2, characterized in that, The tail end of the force-applying lever (1) is fitted with a set of positioning holes (102) in the "I"-shaped structure area formed by the carrier plate. A U-shaped positioning pin (8) for positioning the arm assembly (6) is movably inserted into one of the positioning holes (102).

4. A manhole cover opening tool according to claim 1, characterized in that, The arm extension assembly (6) includes an arm extension body (601) and a pin (602). The end of the arm extension body (601) is provided with a hole for the pin (602) to pass through. The end of the arm extension body (601) is rotatably mounted on the side of the force-applying lever (1) through the cooperation of the pin (602) and the pin hole (101). The part of the end of the arm extension body (601) near the rear side is integrally formed with a limiting top block that abuts against the force-applying lever (1). The maximum angle of the arm extension body (601) is 30-45 degrees.

5. A manhole cover opening tool according to claim 4, characterized in that, The bottom of the arm body (601) is provided with mounting holes (603) for installing the lifting assembly (7) at equal intervals along the length of the arm body (601), while the top of the arm body (601) is provided with hanging holes (604) for fixing the lifting assembly (7) at equal intervals along the length of the arm body (601).

6. A manhole cover opening tool according to claim 1, characterized in that, The pull rod (3) and the pad (4) are designed to be parallel, and the pad (4) is installed vertically at the end of the force-applying lever (1); The pull rod (3) includes a threaded rod (301) that is threaded into a threaded hole (2) and extends through the threaded hole (2) to the bottom end of the force-applying lever (1), and a first pull head (302) is hinged to the bottom end of the threaded rod (301). The first pull head (302) includes a first U-shaped lock head (321) hinged to the bottom end of the threaded rod (301) and a T-shaped pull head (322) integrally formed at the bottom of the first U-shaped lock head (321).

7. A manhole cover opening tool according to claim 1, characterized in that, The lifting assembly (7) includes a chain (701); a second U-shaped lock head (702) is installed at the top of the chain (701), and a second pull head (703) with the same structure as the first pull head (302) is installed at the bottom of the chain (701); the second U-shaped lock head (702) is detachably installed in the mounting hole (603) by means of a pin.

8. A manhole cover opening tool according to claim 3, characterized in that, The bottom of the force-applying lever (1) near the front end is provided with a groove for limiting the hydraulic jack (10); the bottom of the "I"-shaped structure area formed by the tail end of the force-applying lever (1) and the carrier plate is provided with a strap (9) for binding the hydraulic jack (10).

9. A manhole cover opening tool according to claim 8, characterized in that, A horizontal handle is welded to the front end of the force-applying lever (1), while two rubber wheels (5) are symmetrically installed on the side of the bottom of the pad (4) away from the handle via a bracket.

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