A well lid opening and closing device for municipal pipeline rapid maintenance

Abstract

The utility model discloses a well lid opening and closing device for municipal pipeline rapid overhaul, including holding lever, first pull rod, first grip sleeve and second grip sleeve, first pull rod is connected in holding lever end, and first grip sleeve and second grip sleeve all are set up on holding lever, still include auxiliary extraction mechanism and power -assisted mechanism, and auxiliary extraction mechanism is used to assist first pull rod and lifts well lid, and power -assisted mechanism is used to provide power when resetting well lid. The utility model discloses adaptation flexibility is strong, can accurate matching different specifications well lid, and auxiliary extraction mechanism can adjust second pull rod position through unscrewing locking part, sliding mounting spare, makes second pull rod and first pull rod spacing adaptation well lid hole distance, need not to carry multiple tools, and adaptation different municipal well lid, guarantee tool and well lid stable connection, reduce operation interruption.

Description

Technical Field

[0001] This utility model relates to the field of rapid maintenance technology for municipal pipelines, specifically to a manhole cover opening and closing device for rapid maintenance of municipal pipelines. Background Technology

[0002] In municipal pipeline maintenance, opening and closing manhole covers is a crucial step in the initial preparation. Currently, commonly used tools for opening and closing manhole covers are mostly single-sized crowbars, hooks, or fixed-spaced double-bar tools. When using a crowbar, workers insert one end into the edge gap or hole of the manhole cover, using leverage to pry it open. Once the gap is raised, the cover is then lifted by hand or with an auxiliary tool. If using a fixed-spaced double-bar tool, the two bars are inserted into the corresponding holes on the manhole cover, and the ends are held with both hands and pulled upwards or pried open. After maintenance, the manhole cover is then manually moved back into place with the aid of simple tools.

[0003] However, existing manhole cover opening and closing tools have significant limitations and cannot meet the diverse opening and closing needs of municipal manhole covers. Firstly, they have poor adaptability. Most existing tools have fixed structures, and the crowbar can only exert force through a single contact point, which is prone to slippage due to unstable contact. Furthermore, they are difficult to adapt to manhole covers of different thicknesses or edge structures. The spacing between the rods of fixed-spacing double-bar tools cannot be adjusted, while manhole covers in municipal engineering vary in size, and the spacing of the holes differs in different areas and for different purposes. When the tool spacing does not match the hole spacing, it cannot be effectively inserted into the hole to exert force, requiring the replacement with a tool of the corresponding size. This forces workers to carry multiple tools to and from the work site, increasing their carrying burden and operational complexity. Secondly, the connection stability is insufficient. When the crowbar contacts the manhole cover at a single point, the tool is prone to displacement during force application, even causing the manhole cover to suddenly tilt, posing a safety hazard. If the fixed-spacing tool does not fit the manhole cover hole properly, it is prone to loosening after insertion, failing to stably transmit force. Repeated adjustments to the tool position are required, leading to operational interruptions, prolonging the manhole cover opening and closing time, and affecting the overall efficiency of municipal pipeline maintenance. Third, the operation is inflexible. When faced with non-standard manhole covers, such as old manhole covers with worn holes or abnormal spacing, existing tools are difficult to find a suitable point of force. More time and effort are required to try different operating methods, which further reduces the efficiency of the operation and cannot meet the needs of quick and efficient opening and closing of manhole covers in municipal maintenance operations. Utility Model Content

[0004] The problem this utility model aims to solve is to provide a manhole cover opening and closing device for rapid maintenance of municipal pipelines. This utility model is highly adaptable and flexible, and can accurately match manhole covers of different specifications. The auxiliary extraction mechanism can adjust the position of the second pull rod by loosening the locking part and sliding the mounting part, so that the distance between the second pull rod and the first pull rod matches the distance of the manhole cover hole. It eliminates the need to carry multiple tools, adapts to different municipal manhole covers, ensures a stable connection between tools and manhole covers, and reduces operation interruptions.

[0005] The technical solution provided by this utility model to solve the above problems is as follows: a manhole cover opening and closing device for rapid maintenance of municipal pipelines, including a handle, a first pull rod, a first grip sleeve and a second grip sleeve. The first pull rod is connected to the end of the handle, and the first grip sleeve and the second grip sleeve are both sleeved on the handle. It also includes an auxiliary extraction mechanism and an assist mechanism. The auxiliary extraction mechanism is used to assist the first pull rod in lifting the manhole cover, and the assist mechanism is used to provide assistance when resetting the manhole cover.

[0006] More preferably, the grip is tilted on one side.

[0007] More preferably, the first and second grips are used to increase friction and prevent slippage when retrieving the manhole cover.

[0008] More preferably, the auxiliary extraction mechanism includes a mounting component, a second pull rod, and a locking component. The mounting component is sleeved on the grip rod, the second pull rod is fixed to the end of the mounting component, and the locking component is threadedly connected to the mounting component.

[0009] More preferably, the assist mechanism includes a support member, a protruding rod, a rotating member, a rotating rod, a mounting base, and a pedal. The pedal is rotatably mounted on the top of the mounting base, the rotating rod is fixedly connected to the top of the mounting base, the rotating member is rotatably connected to the end of the rotating rod, the support member is rotatably connected to the rotating member, the protruding rod is fixedly connected to the support member, and the grip bar is inserted into the protruding rod and located inside the support member.

[0010] More preferably, the grip has a locking hole, into which the protruding rod is inserted.

[0011] Compared with the prior art, the advantages of this utility model are: this utility model has strong adaptability and can accurately match different specifications of manhole covers. The auxiliary extraction mechanism can adjust the position of the second pull rod by loosening the locking part and sliding the mounting part, so that the distance between the second pull rod and the first pull rod matches the distance of the manhole cover hole. There is no need to carry multiple tools, it can adapt to different municipal manhole covers, ensures a stable connection between the tools and the manhole cover, and reduces operation interruption.

[0012] Opening manhole covers is effortless and efficient, reducing physical exertion. The handle is tilted on one side, and the force is applied at two points with the first and second levers, using the lever principle to reduce the force required. The first and second grips increase friction to prevent slippage, allowing a single person to easily lift the manhole cover. It is more labor-saving than traditional tools, shortens the opening time, and improves the efficiency of maintenance preparation.

[0013] The manhole cover resetting mechanism provides significant assistance, ensuring accuracy and safety. During resetting, the assist mechanism quickly connects to the handle through the protruding rod and the locking hole. Stepping on the pedal to fix the mounting base and pressing down on the handle allows the lever structure to lift the manhole cover, easily adjusting its position for precise resetting. This avoids operational difficulties caused by the weight of the manhole cover, prevents rainwater and debris from seeping in, and reduces physical exertion and safety risks. Attached Figure Description

[0014] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a partial cross-sectional three-dimensional structural diagram of the auxiliary extraction mechanism of this utility model.

[0017] Figure 3 This is a partial cross-sectional three-dimensional structural diagram of the first type of assist mechanism of this utility model.

[0018] Figure 4 This is a schematic diagram of a second partial cross-sectional three-dimensional structure of the assist mechanism of this utility model.

[0019] Figure labels: 1. Grip bar; 2. First pull rod; 3. First grip sleeve; 4. Second grip sleeve; 5. Auxiliary extraction mechanism; 51. Mounting component; 52. Second pull rod; 53. Locking component; 6. Assist mechanism; 61. Support component; 62. Protruding rod; 63. Rotating component; 64. Rotating rod; 65. Mounting base; 66. Pedal. 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 of the present utility model. In the description of the present utility model, it should be noted that the terms "first," "second," etc., are used for descriptive purposes only and do not specifically refer to any order or sequence, nor are they intended to limit the present utility model. They are merely used to distinguish components or operations described with the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. The term "comprising" and any variations thereof in the specification, claims, and accompanying drawings of the present utility model are intended to cover non-exclusive inclusion.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Furthermore, it should be understood in the description of this utility model that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Example: As shown in the attached figure, a manhole cover opening and closing device for rapid maintenance of municipal pipelines includes a handle 1, a first pull rod 2, a first grip sleeve 3, and a second grip sleeve 4. The first pull rod 2 is connected to the end of the handle 1, and half of the handle 1 is inclined. The first pull rod 2 is used to lift the manhole cover. The first grip sleeve 3 and the second grip sleeve 4 are both sleeved on the handle 1. The first grip sleeve 3 and the second grip sleeve 4 are used to increase friction and prevent slippage when lifting the manhole cover. It also includes an auxiliary lifting mechanism 5 and an assist mechanism 6. The auxiliary lifting mechanism 5 is used to assist the first pull rod 2 in lifting the manhole cover, and the assist mechanism 6 is used to provide assistance when resetting the manhole cover.

[0024] The auxiliary extraction mechanism 5 includes an installation component 51, a second pull rod 52, and a locking component 53. The installation component 51 is sleeved on the handle 1, and the second pull rod 52 is fixed to the end of the installation component 51. The position of the second pull rod 52 can be adjusted according to the distance of the hole in the manhole cover. The locking component 53 is threadedly connected to the installation component 51. The second pull rod 52 and the first pull rod 2 are inserted into the hole in the manhole cover to cooperate. Lifting the handle 1 will lift the manhole cover.

[0025] The assist mechanism 6 includes a support 61, a protruding rod 62, a rotating part 63, a rotating rod 64, a mounting base 65, and a pedal 66. The pedal 66 is rotatably mounted on the top of the mounting base 65. The rotating rod 64 is fixedly connected to the top of the mounting base 65. The rotating part 63 is rotatably connected to the end of the rotating rod 64. The support 61 is rotatably connected to the rotating part 63. The protruding rod 62 is fixedly connected to the support 61. A locking hole is provided on the grip 1. The protruding rod 62 is inserted into the locking hole of the grip 1. When resetting the manhole cover, the pedal 66 can be stepped on to fix it. Then, the grip 1 is pressed down to lift the manhole cover, and then the manhole cover can be reset.

[0026] When using this manhole cover opening and closing device for rapid maintenance of municipal pipelines, first adjust the position of the auxiliary extraction mechanism 5 according to the position and spacing of the holes in the manhole cover to be opened or closed: loosen the locking part 53 on the mounting part 51. Since the mounting part 51 is sleeved on the handle 1, the mounting part 51 can slide along the handle 1, driving the second pull rod 52 fixed to the end of the mounting part 51 to move until the distance between the second pull rod 52 and the first pull rod 2 matches the distance of the manhole cover hole. Then tighten the locking part 53 to fix the position of the mounting part 51, ensuring that the second pull rod 52 and the first pull rod 2 can be accurately inserted into the manhole cover hole in subsequent operations, avoiding unstable force due to spacing deviation.

[0027] Next, the manhole cover opening operation is performed: Insert the first pull rod 2 and the adjusted second pull rod 52 into the corresponding holes of the manhole cover. The worker holds the first grip 3 and the second grip 4 on the handle 1 with both hands. The first grip 3 and the second grip 4 increase the friction between the hand and the handle 1, preventing slippage when lifting the manhole cover and ensuring operational safety. Using the first pull rod 2 as a fulcrum, lift the handle 1 upwards. Because half of the handle 1 is inclined, the inclined structure reduces the force required when lifting the handle 1 using the lever principle. Combined with the force exerted on the manhole cover by the first pull rod 2 and the second pull rod 52, the manhole cover is easily lifted, completing the initial opening of the manhole cover. Compared to traditional single-tool opening, this method is more labor-saving and improves the efficiency of preparation before municipal pipeline maintenance.

[0028] When the municipal pipeline maintenance is completed and the manhole cover needs to be reset, the assist mechanism 6 begins to function: first, place the mounting base 65 on the flat ground around the manhole cover, align the locking hole on the handle 1 with the protruding rod 62 fixed on the support 61, and insert the protruding rod 62 into the locking hole of the handle 1 to achieve the connection between the handle 1 and the assist mechanism 6. The worker places one foot on the rotating pedal 66 on top of the mounting base 65, which secures the mounting base 65 and prevents the assist mechanism 6 from shifting when pressing down on the lever 1. Then, the worker grips the first grip 3 and the second grip 4 with both hands and presses down on the lever 1. The lever 1 causes the support member 61 to rotate around the rotating member 63, which is rotatably connected to the end of the rotating rod 64 fixed to the top of the mounting base 65. The entire assist mechanism 6 forms a stable lever structure, significantly reducing the force required to press down on the lever 1. This allows the worker to easily lift and adjust the position of the manhole cover, accurately repositioning it to the manhole opening. This avoids the operational difficulties or repositioning deviations caused by the weight of the manhole cover during traditional repositioning processes, ensuring the sealing and safety of the manhole cover after repositioning. It also reduces the worker's physical exertion and improves the overall efficiency of municipal pipeline maintenance.

[0029] The above description only illustrates the preferred embodiment of this utility model and should not be construed as limiting the scope of the claims. This utility model is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of this utility model are also within the scope of protection of this utility model.

Claims

1. A manhole cover opening and closing device for rapid maintenance of municipal pipelines, comprising a handle (1), a first pull rod (2), a first grip sleeve (3), and a second grip sleeve (4), wherein the first pull rod (2) is connected to the end of the handle (1), and the first grip sleeve (3) and the second grip sleeve (4) are both sleeved on the handle (1), characterized in that, It also includes an auxiliary extraction mechanism (5) and an assist mechanism (6). The auxiliary extraction mechanism (5) is used to assist the first pull rod (2) in lifting the manhole cover, and the assist mechanism (6) is used to provide assistance when resetting the manhole cover.

2. The manhole cover opening and closing device for rapid maintenance of municipal pipelines according to claim 1, characterized in that, The grip (1) is tilted on one side.

3. A manhole cover opening and closing device for rapid maintenance of municipal pipelines according to claim 1, characterized in that, The first grip (3) and the second grip (4) are used to increase friction and prevent slippage when retrieving the well cover.

4. A manhole cover opening and closing device for rapid maintenance of municipal pipelines according to claim 1, characterized in that, The auxiliary extraction mechanism (5) includes an installation part (51), a second pull rod (52) and a locking part (53). The installation part (51) is sleeved on the grip rod (1), the second pull rod (52) is fixed to the end of the installation part (51), and the locking part (53) is threadedly connected to the installation part (51).

5. A manhole cover opening and closing device for rapid maintenance of municipal pipelines according to claim 1, characterized in that, The assist mechanism (6) includes a support (61), a protruding rod (62), a rotating part (63), a rotating rod (64), a mounting base (65), and a pedal (66). The pedal (66) is rotatably mounted on the top of the mounting base (65). The rotating rod (64) is fixedly connected to the top of the mounting base (65). The rotating part (63) is rotatably connected to the end of the rotating rod (64). The support (61) is rotatably connected to the rotating part (63). The protruding rod (62) is fixedly connected to the support (61). The grip (1) is inserted into the protruding rod (62) and located inside the support (61).

6. A manhole cover opening and closing device for rapid maintenance of municipal pipelines according to claim 5, characterized in that, A locking hole is provided on the grip (1), and the protruding rod (62) is inserted into the locking hole of the grip (1).

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