Manhole cover opening device

Abstract

This utility model discloses a manhole cover opening device, including a main rod with a roller at its lower end and a suspension rod perpendicular to the main rod. One end of the suspension rod is connected to the main rod, and the other end has a cover-lifting rod with a hook that can engage with an opening in the manhole cover panel. The roller is mounted on the lower end of the main rod via a fixing plate and a wheel seat. A sleeve at one end of the suspension rod is fitted onto the main rod and can slide, with a locking screw on the sleeve for fixing its position. The cover-lifting rod is movably inserted through the suspension rod, with a positioning rod at its upper end. At least one of the hook and the positioning rod is detachable. An extended rod section is fitted onto the upper end of the main rod and fixed by a telescopic locking component with an arc-shaped bite. This utility model, using the above structure, opens the manhole cover with effort using the lever principle. The roller provides stable support, and the sliding sleeve and telescopic rod section can adapt to different sizes of manhole covers. The folding and storage design improves portability, effectively solving the problems of laborious opening methods, poor tool versatility, and insufficient portability.

Description

Technical Field

[0001] This utility model relates to the field of municipal maintenance equipment, specifically a manhole cover opening device. Background Technology

[0002] In urban infrastructure construction and maintenance, manhole covers serve as crucial protective facilities for underground pipeline systems, widely distributed across roads, sidewalks, residential areas, and other locations. The operation of opening manhole covers is a critical step in pipeline inspection, maintenance, and emergency repairs, directly impacting work efficiency and construction safety.

[0003] Currently, traditional methods of opening manhole covers mainly rely on manual labor using simple tools such as crowbars and hooks. This approach has several significant drawbacks: Firstly, manhole covers are typically heavy and have a tight fit with the manhole base formed by long-term compression, requiring considerable physical strength to open manually. Single-person operation is often insufficient, especially for heavy manhole covers, which often require multiple people working together, resulting in high labor intensity and low efficiency. Secondly, traditional tools lack a stable load-bearing structure, making them prone to slippage during opening, potentially causing hand injuries to operators and posing a significant safety hazard.

[0004] While some manhole cover opening aids have emerged in the existing technology, most are complex in structure and large in size, making them inconvenient to carry and use flexibly in confined working spaces. Some tools adopt a fixed structure design, which cannot be adjusted according to parameters such as the height and opening position of different sizes of manhole covers, resulting in poor versatility; others lack folding and storage functions, taking up a lot of space during transportation and storage, which is not conducive to daily carrying and turnover. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a manhole cover opening device that can solve the problems of high labor intensity and low safety of traditional manhole cover opening methods, while being easy to carry and improving the versatility of the device.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a manhole cover opening device, including a main rod, a roller at the lower end of the main rod, a suspension rod perpendicular to the main rod at a position near the lower end of the main rod, one end of the suspension rod being connected to the main rod, and the other end being provided with a cover-lifting rod parallel to the main rod, the end of the cover-lifting rod being provided with a hook part that cooperates with an opening on the manhole cover panel.

[0007] In a preferred embodiment, a fixing plate is fixedly provided at the lower end of the main rod, and a wheel seat is provided on the bottom surface of the fixing plate, with rollers mounted on the wheel seat.

[0008] In a preferred embodiment, one end of the suspension rod is provided with a sleeve, which is fitted onto the main rod and can slide freely along the axial direction of the main rod.

[0009] In a preferred embodiment, a locking screw is provided on one side of the sleeve, and the end of the locking screw passes through the sleeve and is in tight contact with the outer wall of the main rod.

[0010] In a preferred embodiment, the cover-lifting rod is movably mounted on one end of the suspension rod, the hook is located at the lower end of the cover-lifting rod, and a positioning rod is provided at the upper end of the cover-lifting rod.

[0011] In a preferred embodiment, at least one of the hook and the positioning rod is detachably connected to the positioning rod.

[0012] In a preferred embodiment, an extension rod section is sleeved on the upper end of the main rod.

[0013] In a preferred embodiment, the extension rod section is inserted through the upper end of the main rod, and a telescopic locking component is provided at the connection point between the main rod and the extension rod section;

[0014] The main rod has multiple vertical grooves around the opening at the upper end, which form multiple arc-shaped bites at the upper end of the main rod. The telescopic locking component is sleeved on the outer wall of the main rod, and the telescopic locking component presses the arc-shaped bites to achieve the locking of the extended rod section.

[0015] In a preferred embodiment, the telescopic locking component is a sleeve structure with internal threads, and the outer wall of the main rod below the arc-shaped bite is provided with threads, with the telescopic locking component disposed on the threads.

[0016] In a preferred embodiment, the length of the cover-lifting rod is greater than the distance from the sleeve to the roller.

[0017] The manhole cover opening device provided by this utility model, by adopting the above-described structure, has the following beneficial effects:

[0018] (1) The device uses the lever structure formed by the main rod, suspension rod and cover lifting rod to transform the direct force of manually opening the manhole cover into a lever-based, labor-saving operation. With the precise matching of the hook and the opening of the manhole cover, a single person can easily complete the manhole cover opening operation, effectively solving the problem of laborious traditional manual operation and the need for multiple people to work together, and greatly improving the work efficiency.

[0019] (2) The device can flexibly adjust its structural dimensions according to usage requirements through the sliding fit between the sleeve and the main rod and the telescopic design of the extended rod section. When idle, it can be folded and stored, greatly reducing the storage and transportation space. The rollers also make it easy for operators to move the device at the work site, meeting the requirements for tool portability in scenarios such as municipal maintenance.

[0020] (3) The suspension rod slides along the main rod axis through the sleeve and can be fixed by the locking screw, which can adapt to the opening requirements of manhole covers of different heights. The cover lifting rod is movably inserted through the suspension rod and the hook is detachable. The hook can be replaced according to the opening specifications of the manhole cover, which expands the applicability of the device and solves the problem of poor versatility of traditional fixed structure tools. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0023] Figure 2 This is a structural diagram of the connection point between the main rod and the extended rod section of this utility model.

[0024] Figure 3 This is a structural diagram illustrating the working process of this utility model.

[0025] In the diagram: 1. Main rod, 2. Fixing plate, 3. Wheel seat, 4. Roller, 5. Suspension rod, 6. Sleeve, 7. Locking screw, 8. Cover lifting rod, 9. Hook, 10. Positioning rod, 11. Extension rod section, 12. Telescopic locking component, 13. Thread, 14. Vertical groove, 15. Arc plate bite, 16. Well cover. Detailed Implementation

[0026] like Figure 1-3 In the present invention, a manhole cover opening device includes a main rod 1, a roller 4 at the lower end of the main rod 1, a suspension rod 5 perpendicular to the main rod 1 at a position near the lower end of the main rod 1, one end of the suspension rod 5 being connected to the main rod 1, and the other end being provided with a cover-lifting rod 8 parallel to the main rod 1, and the end of the cover-lifting rod 8 being provided with a hook 9 that engages with an opening on the panel of the manhole cover 16.

[0027] In a preferred embodiment, a fixing plate 2 is fixedly provided at the lower end of the main rod 1, and a wheel seat 3 is provided on the bottom surface of the fixing plate 2, with the roller 4 mounted on the wheel seat 3.

[0028] In a preferred embodiment, one end of the suspension rod 5 is provided with a sleeve 6, which is sleeved on the main rod 1 and can slide freely along the axial direction of the main rod 1.

[0029] In a preferred embodiment, a locking screw 7 is provided on one side of the sleeve 6, and the end of the locking screw 7 passes through the sleeve 6 and is in tight contact with the outer wall of the main rod 1.

[0030] In a preferred embodiment, the cover-lifting rod 8 is movably inserted through one end of the suspension rod 5, the hook 9 is located at the lower end of the cover-lifting rod 8, and the upper end of the cover-lifting rod 8 is provided with a positioning rod 10.

[0031] In a preferred embodiment, at least one of the hook portion 9 and the positioning rod 10 is detachably connected to the positioning rod 10.

[0032] In a preferred embodiment, an extension rod section 11 is sleeved on the upper end of the main rod 1.

[0033] In a preferred embodiment, the extended rod section 11 is inserted through the upper end of the main rod 1, and a telescopic locking member 12 is provided at the connection position between the main rod 1 and the extended rod section 11.

[0034] The main rod 1 has multiple vertical grooves 14 around the opening at the upper end. The multiple vertical grooves 14 form multiple arc-shaped bites 15 at the upper end of the main rod 1. The telescopic locking member 12 is sleeved on the outer wall of the main rod 1. The telescopic locking member 12 presses the arc-shaped bites 15 to achieve the locking of the extended rod section 11.

[0035] In a preferred embodiment, the telescopic locking member 12 is a sleeve structure with internal threads, and the outer wall of the main rod 1 below the arc bite 15 is provided with threads 13, and the telescopic locking member 12 is disposed on the threads 13.

[0036] In a preferred embodiment, the length of the cover-lifting rod 8 is greater than the distance from the sleeve 6 to the roller 4.

[0037] In the above scheme, a plastic structure is used at the position of the arc plate bite 15 to achieve compression deformation and bite the extended rod section 11.

[0038] At least one of the hook 9 and the positioning rod 10 is detachably connected to the positioning rod 10. This allows for the replacement of the hook 9 and enables the cover-lifting rod 8 to be disassembled and stored when the device is not in use.

[0039] Based on the above scheme, a hinged connection can be further set at the connection position between the suspension rod 5 and the sleeve 6. When not in use, the suspension rod 5 can be rotated 90° to keep in the same direction as the main rod 1, further reducing the space occupied by the device.

[0040] The manhole cover opening device disclosed in this utility model is used when performing manhole cover opening operations:

[0041] Based on the height of the operator, the extension rod section 11 is pulled out from the main rod 1, and then the telescopic locking member 12 is rotated to press the telescopic locking member 12 against the arc plate bite 15, thereby ensuring that the arc plate bite 15 bites the extension rod section 11, thus realizing the length adjustment of the device.

[0042] Then, based on the height of the manhole cover 16 and the position of the opening, adjust the position of the sleeve 6 on the main rod 1, loosen the locking screw 7, slide the sleeve 6 up and down to the appropriate position, and then tighten the locking screw 7 to fix the sleeve 6. Then, based on the opening size of the manhole cover, select a suitable hook 9 (if it is a detachable hook), and insert the hook 9 at the lower end of the cover lifting rod 8 into the opening on the panel of the manhole cover 16.

[0043] The operator holds the upper end of the main rod 1 or the extended rod section 11, adjusts the extension length of the extended rod section 11, tightens the telescopic locking part 12 to fix it, and uses the lever principle to press the main rod 1 downward. With the support of the roller 4, the cover lifting rod 8 drives the well cover 16 to open upward through the hook part 9 until the well cover 16 is fully opened.

[0044] After the operation is completed, loosen the locking screw 7 and the telescopic locking piece 12, slide the sleeve 6 to the lower end of the main rod 1, and retract the extended rod section 11 into the main rod 1 to realize the folding and storage of the device, making it easy to carry and store.

Claims

1. A device for opening a manhole cover, comprising a main rod (1), characterised in that: The main rod (1) is provided with a roller (4) at the lower end. The main rod (1) is provided with a suspension rod (5) perpendicular to the main rod (1) near the lower end. One end of the suspension rod (5) is connected to the main rod (1), and the other end is provided with a cover lifting rod (8) parallel to the main rod (1). The end of the cover lifting rod (8) is provided with a hook (9) that cooperates with the opening on the well cover (16) panel.

2. A device for opening a manhole cover as claimed in claim 1, characterised in that: A fixing plate (2) is fixedly provided at the lower end of the main rod (1), and a wheel seat (3) is provided on the bottom surface of the fixing plate (2), and a roller (4) is installed on the wheel seat (3).

3. A device for opening a manhole cover as defined in claim 1, characterized in that: The suspension rod (5) has a sleeve (6) at one end. The sleeve (6) is fitted onto the main rod (1) and can slide freely along the axis of the main rod (1).

4. A device for opening a manhole cover as claimed in claim 3, characterised in that: A locking screw (7) is provided on one side of the sleeve (6), and the end of the locking screw (7) passes through the sleeve (6) and is in tight contact with the outer wall of the main rod (1).

5. A device for opening a manhole cover as defined in claim 1, wherein: The cover-lifting rod (8) is movably inserted through one end of the suspension rod (5), the hook (9) is located at the lower end of the cover-lifting rod (8), and the upper end of the cover-lifting rod (8) is provided with a positioning rod (10).

6. A device for opening a manhole cover as claimed in claim 5, characterised in that: At least one of the hook (9) and the positioning rod (10) is detachably connected to the positioning rod (10).

7. A device for opening a manhole cover as defined in claim 1, wherein: An extended rod section (11) is sleeved on the upper end of the main rod (1).

8. A device for opening a manhole cover as claimed in claim 7, characterised in that: The extension rod section (11) is inserted through the upper end of the main rod (1), and a telescopic locking member (12) is provided at the connection position between the main rod (1) and the extension rod section (11). The main rod (1) has multiple vertical grooves (14) around the opening at the upper end. The multiple vertical grooves (14) form multiple arc-shaped bites (15) at the upper end of the main rod (1). The telescopic locking member (12) is sleeved on the outer wall of the main rod (1). The telescopic locking member (12) presses the arc-shaped bites (15) to achieve the clamping of the extended rod section (11).

9. A device for opening a manhole cover as claimed in claim 8, characterised in that: The telescopic locking component (12) is a sleeve structure with internal threads. The outer wall of the main rod (1) below the arc bite (15) is provided with threads (13), and the telescopic locking component (12) is set on the threads (13).

10. A device for opening a manhole cover as defined in claim 3, wherein: The length of the cover lifting rod (8) is greater than the distance from the sleeve (6) to the roller (4).

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