Portable pry bar for easy opening of manhole covers

Abstract

The utility model provides a portable crowbar of convenient opening well lid, including crowbar, adjusting seat and the lifting hook for lifting well lid, the one end of crowbar is support end, its other end is force end, adjusting seat is sleeved on crowbar, lifting hook is vertically arranged in adjusting seat lower extreme, adjusting seat can move along the length direction of crowbar, to adjust the distance between lifting hook and crowbar support end, and setting locking bolt on adjusting seat, can lock adjusting seat through locking bolt, lifting hook can be hooked in the air hole of well lid, with the help of crowbar auxiliary to lifting hook force, can conveniently open well lid, and when meeting the friction of well lid and well seat is bigger, when opening is difficult, can flexibly adjust the position of lifting hook on crowbar, adjusts the proportion of crowbar force end, to increase the lifting power of crowbar to lifting hook, this portable crowbar is convenient to use, laborsaving, portable, has improved the work efficiency of well lid opening.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover opening pry tool technology, specifically to a portable pry tool for conveniently opening manhole covers. Background Technology

[0002] With the acceleration of urbanization, the scale of underground pipe networks is growing exponentially. Inspection manholes, as key nodes in these systems, undertake core functions such as equipment maintenance, pipe dredging, and fault diagnosis. Their safety and maintainability directly impact the operational efficiency of urban infrastructure. Manhole covers, as core components of inspection manholes, possess crucial functions of load-bearing, sealing, and opening / closing. They can withstand the pressure generated by high-volume, high-speed traffic and effectively prevent vehicles, pedestrians, and foreign objects from entering, thus ensuring the normal operation of underground pipe networks and equipment.

[0003] Currently, during routine maintenance, workers typically open manhole covers by using a hook tool to pull them open through the vent. However, cast iron and composite material manhole covers commonly used in municipal underground pipe systems are quite heavy, making them extremely difficult to open with traditional hook tools. More importantly, during the rainy season, silt deposition significantly increases the friction between the manhole cover and its base, with some covers even being completely buried. Furthermore, manhole covers that have been severely corroded by rainwater over a long period are prone to getting stuck in their bases. All these conditions lead to severe blockages between the cover and base, drastically increasing opening resistance and making manhole cover opening even more difficult. Existing hook tools are insufficient to meet these needs. Workers are forced to carry pry bars, making the manual opening of manhole covers time-consuming, labor-intensive, and inconvenient, severely reducing work efficiency. Utility Model Content

[0004] In view of this, it is necessary to provide a portable pry tool that facilitates the opening of manhole covers, so as to solve the technical problem of inconvenient opening of manhole covers in the prior art.

[0005] The technical solution adopted by this utility model to solve its technical problem is: A portable pry tool for easily opening manhole covers includes a pry bar, an adjusting seat, and a hook for lifting the manhole cover. One end of the pry bar is a support end, and the other end is a force-applying end. The adjusting seat is fitted onto the pry bar, and the hook is vertically positioned at the lower end of the adjusting seat. The adjusting seat can move along the length of the pry bar to adjust the distance between the hook and the support end of the pry bar. A locking bolt is provided on one side or at the upper end of the adjusting seat, which is threadedly connected to the adjusting seat and can be inserted into the adjusting seat to abut against the side wall of the pry bar to lock the adjusting seat. The hook can be hooked into the vent hole of the manhole cover. The support end of the pry bar can be supported on or outside the manhole cover. Lifting the force-applying end of the pry bar upwards can pull the hook upwards, using the hook to pry up the manhole cover.

[0006] Preferably, the support end of the pry bar is integrally provided with a flat pry head.

[0007] Preferably, a fixing head is provided at the lower end of the adjusting seat, and there are at least two lifting hooks. Each lifting hook has a connector that matches the fixing head on its hook handle. The connector on any lifting hook can be detachably connected to the fixing head of the adjusting seat.

[0008] Preferably, the shank length of each hook is different.

[0009] Preferably, each hook has an anti-slip protrusion on the end face where it hooks into the vent hole of the manhole cover.

[0010] Preferably, a secondary fixing head that matches the connector on the hook is also provided on one side or the back of the adjusting seat, and the connector on any hook and the secondary fixing head can be detachably connected.

[0011] Preferably, the force-applying end of the pry bar is further provided with a force-adding rod, which is sleeved and connected to the pry bar and can be extended and retracted along the length of the pry bar.

[0012] Preferably, the end of the force-adding rod away from the pry bar is fitted with an anti-slip sleeve.

[0013] Preferably, the cross-section of the pry bar is polygonal, and the adjustment seat matches the pry bar.

[0014] Preferably, the sidewall where the pry bar contacts the locking bolt is provided with anti-slip texture.

[0015] As can be seen from the above technical solution, the portable pry tool for conveniently opening manhole covers provided in this application includes a pry bar, an adjusting seat, and a lifting hook for lifting the manhole cover. One end of the pry bar is the support end, and the other end is the force-applying end. The adjusting seat is sleeved on the pry bar, and the lifting hook is vertically set at the lower end of the adjusting seat. The adjusting seat can move along the length of the pry bar to adjust the distance between the lifting hook and the support end of the pry bar. A locking bolt is provided on the adjusting seat, which can lock the adjusting seat. Its beneficial effects are: the lifting hook can be hooked into the vent hole of the manhole cover, and the pry bar can be used to assist in applying force to the lifting hook, which can easily open the manhole cover. When the friction between the manhole cover and the manhole seat is large and it is difficult to open, the position of the lifting hook on the pry bar can be flexibly adjusted to adjust the force-applying end ratio of the pry bar to increase the lifting force of the pry bar on the lifting hook. This portable pry tool is convenient to use, labor-saving, and easy to carry, which improves the work efficiency of opening manhole covers. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the utility model.

[0017] Figure 2 This is an assembly diagram of the utility model.

[0018] Figure 3 This is a schematic diagram of the lifting hook structure.

[0019] Figure 4 This is a schematic diagram of the lifting hook structure in another preferred embodiment.

[0020] Figure 5 This is a schematic diagram illustrating the state of opening the manhole cover using this utility model.

[0021] In the diagram: pry bar 10, adjusting seat 11, locking bolt 12, fixing head 13, secondary fixing head 14, anti-slip texture 15, positioning bolt 16, lifting hook 20, pry head 30, connecting head 21, anti-slip protrusion 22, force-adding rod 40, anti-slip sleeve 41. Detailed Implementation

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Please refer to Figure 1 and Figure 5This utility model provides a portable pry tool for easily opening manhole covers, including a pry bar 10, an adjusting seat 11, and a lifting hook 20 for lifting the manhole cover. One end of the pry bar 10 is a support end, and the other end is a force-applying end. The adjusting seat 11 is sleeved on the pry bar 10, and the lifting hook 20 is vertically arranged at the lower end of the adjusting seat 11. The adjusting seat 11 can move along the length of the pry bar 10 to adjust the distance between the lifting hook 20 and the support end of the pry bar 10. A locking bolt 12 is provided on one side or the upper end of the adjusting seat 11, which can be inserted into the adjusting seat 11. The locking bolt 12 is threadedly connected to the adjusting seat 11 and can be inserted into the adjusting seat 11 to abut against the side wall of the pry bar 10 to lock the position of the adjusting seat 11 before opening. When opening a manhole cover, hold the pry bar 10 and hook the hook 20 into the vent hole of the manhole cover. Place the support end of the pry bar 10 on the manhole cover or the manhole seat on the outer edge of the manhole cover, and manually lift the force-applying end of the pry bar 10 to pull the hook 20 upwards, using the hook 20 to pry up the manhole cover. During use, the position of the hook 20 can be adjusted according to the situation. To adjust, loosen the locking bolt 12 on the adjusting seat 11 with a wrench, move the adjusting seat 11 along the length of the pry bar 10, and lock the adjusting seat 11 with the locking bolt 12 after the position adjustment is completed. By adjusting the position of the adjusting seat 11, the distance between the hook 20 and the support end of the pry bar 10 can be changed, making it easier for workers to apply force to the hook 20. For example, when the friction between the manhole cover and the manhole seat is large and it is difficult to open, the lifting hook 20 can be moved toward the support end of the pry bar 10 to adjust the force application end ratio of the pry bar 10, thereby increasing the lifting force of the pry bar 10 on the lifting hook 20.

[0024] In this embodiment, in order to facilitate the locking of the adjusting seat 11 by the locking bolt 12 and prevent the adjusting seat 11 from sliding and shifting under the action of the lifting hook 20 during use, anti-slip texture 15 is provided on the side wall where the pry bar 10 contacts the locking bolt 12. When the locking bolt 12 locks the adjusting seat 11, it can abut against the anti-slip texture 15. The anti-slip texture 15 increases the friction between the locking bolt 12 and the pry bar 10, which can prevent the locking bolt 12 from sliding and shifting.

[0025] Please continue reading. Figure 1 Furthermore, the support end of the pry bar 10 is integrally provided with a flat pry head 30. When the gap between the manhole cover and the manhole seat is severely blocked and the manhole cover cannot be opened smoothly, the pry bar 10 can be held by hand, the pry head 30 can be inserted into the gap between the manhole cover and the manhole seat, the manhole cover can be pried open, and then the manhole cover can be pried up using the lifting hook 20.

[0026] Please refer to Figure 2Furthermore, since the thickness of manhole covers made of different materials varies, the hook shank length of the hook 20 used for opening also varies. To facilitate the opening of manhole covers made of different materials, the hook 20 in the above embodiment is designed to be detachable and replaceable. Specifically, a fixing head 13 is provided at the lower end of the adjusting seat 11. There are at least two hooks 20, each with a different hook shank length that is adapted to the manhole cover being opened. Each hook 20 has a connecting head 21 that matches the fixing head 13. The connecting head 21 on any hook 20 and the fixing head 13 are detachably connected by a threaded connection. In actual use, the hook 20 can be replaced with a matching one according to the thickness or type of the manhole cover being opened. After the manhole cover is opened, the hook 20 can be disassembled for easy storage.

[0027] Please refer to Figure 1 or Figure 2 Furthermore, each hook 20 is provided with anti-slip protrusions 22 on the end face where it hooks into the vent hole of the manhole cover. This increases the friction between the hook 20 and the manhole cover and reduces the risk of the hook 20 detaching from the manhole cover during the lifting process.

[0028] Please continue reading. Figure 1 Furthermore, the prying surface of the pry head 30 is also provided with anti-slip protrusions 22, which can increase the friction between the pry head 30 and the manhole cover during use.

[0029] Please refer to Figure 2 Furthermore, to facilitate the use of hooks 20 of different lengths, a secondary fixing head 14 matching the connector 21 on the hook 20 is provided on one side of the adjusting base 11. The secondary fixing head 14 is located on the side of the fixing head 13 and is perpendicular to the fixing head 13. Two hooks 20 of different lengths can be installed on the secondary fixing head 14 and the fixing head 13 respectively. In use, the corresponding hook 20 can be selected by rotating the pry bar 10 according to the usage requirements. In this embodiment, the secondary fixing head 14 can also be set on the back of the adjusting base 11, so that it is set opposite to the fixing head 13.

[0030] Please continue reading. Figure 1 or Figure 2 Furthermore, to facilitate the application of force by the pry bar 10, an extension rod 40 is provided at the force-applying end of the pry bar 10. The extension rod 40 is sleeved and connected to the pry bar 10 and can be extended and retracted along the length of the pry bar 10. An anti-slip sleeve 41 is also sleeved at the end of the extension rod 40 away from the pry bar 10. In use, the extension rod 40 can be extended, and the worker can hold the anti-slip sleeve 41 and apply auxiliary force to the pry bar 10 through the extension rod 40 to facilitate the opening of the manhole cover.

[0031] Furthermore, in this embodiment, the cross-section of the pry bar 10 is a polygonal structure, and the adjustment seat 11 matches the pry bar 10. The polygonal structure can improve the strength of the pry bar 10 and make it easier to grip and apply force.

[0032] In a preferred embodiment, the pry bar 10 is preferably a hollow bar with an open end. The extension rod 40 is also preferably a polygonal cross-section rod that matches the inner cavity of the pry bar 10. The extension rod 40 is inserted into the inner cavity of the pry bar 10 and can extend and retract along the length of the pry bar 10. To facilitate locking the length of the extension rod 40, a positioning bolt 16 is provided on the outer wall of the pry bar 10 near its end. The positioning bolt 16 is threadedly connected to the outer wall of the pry bar 10 and can penetrate into its inner cavity, pressing against the side wall of the extension rod 40 that extends into the inner cavity of the pry bar 10 to lock the extension rod 40. In use, the positioning bolt 16 can be loosened to adjust the length of the extension rod 40 according to the usage requirements.

[0033] Please refer to Figure 3 In a preferred embodiment, the hook tip of the lifting hook 20 is preferably flat, and the inner side of the hook tip forms a 70-degree angle with the hook shank.

[0034] Please refer to Figure 4 In another preferred embodiment, the hook tip of one of the lifting hooks 20 is preferably cylindrical, and the hook tip is at a 90-degree right angle to the hook shank. During use, the lifting hook 20 with a cylindrical hook tip and the lifting hook 20 with a flat hook tip can be used interchangeably depending on the usage.

[0035] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A portable pry tool for easily opening manhole covers, characterized in that: The device includes a pry bar, an adjusting seat, and a hook for lifting the manhole cover. One end of the pry bar is a support end, and the other end is a force-applying end. The adjusting seat is fitted onto the pry bar, and the hook is vertically positioned at the lower end of the adjusting seat. The adjusting seat can move along the length of the pry bar to adjust the distance between the hook and the support end of the pry bar. A locking bolt is provided on one side or at the upper end of the adjusting seat, which can be inserted into the adjusting seat. The locking bolt is threadedly connected to the adjusting seat and can be inserted into the adjusting seat to abut against the side wall of the pry bar to lock the adjusting seat. The hook can be hooked into the vent hole of the manhole cover. The support end of the pry bar can be supported on or outside the manhole cover. Lifting the force-applying end of the pry bar upwards can pull the hook upwards, using the hook to pry up the manhole cover.

2. The portable pry tool for conveniently opening manhole covers as described in claim 1, characterized in that: The support end of the pry bar is integrally provided with a flat pry head.

3. The portable pry tool for conveniently opening manhole covers as described in claim 2, characterized in that: A fixing head is provided at the lower end of the adjusting seat. There are at least two lifting hooks. Each lifting hook has a connector that matches the fixing head on its hook handle. The connector on any lifting hook can be detachably connected to the fixing head of the adjusting seat.

4. The portable pry tool for conveniently opening manhole covers as described in claim 3, characterized in that: The shank length of each hook is different.

5. The portable pry tool for conveniently opening manhole covers as described in claim 4, characterized in that: Each hook has anti-slip protrusions on the end face where it hooks into the vent hole of the manhole cover.

6. The portable pry tool for conveniently opening manhole covers as described in claim 5, characterized in that: A secondary fixing head that matches the connector on the hook is also provided on one side or the back of the adjusting seat. The connector on any hook and the secondary fixing head can be detached and connected.

7. The portable pry tool for conveniently opening manhole covers as described in claim 6, characterized in that: The force-applying end of the pry bar is also provided with a force-adding rod, which is sleeved and connected to the pry bar and can be extended and retracted along the length of the pry bar.

8. The portable pry tool for conveniently opening manhole covers as described in claim 7, characterized in that: The end of the lever away from the pry bar is fitted with an anti-slip sleeve.

9. The portable pry tool for conveniently opening manhole covers as described in claim 8, characterized in that: The cross-section of the pry bar is polygonal, and the adjustment seat matches the pry bar.

10. The portable pry tool for conveniently opening manhole covers as described in claim 1, characterized in that: The side wall where the pry bar contacts the locking bolt is provided with anti-slip texture.

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