Invisible well lid for inspection well in green belt
By designing an invisible manhole cover structure, an energy-storing spring is used to separate the curbstone from the mounting plate, solving the problem of high manpower and material costs required for removing the curbstone and achieving efficient disassembly while maintaining strength.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-04-03
AI Technical Summary
When installing manholes and curbs in green belts, existing technology requires a lot of manpower and materials to remove the curbs, resulting in high construction time costs and easy damage to the curbs during the removal process.
The concealed manhole cover structure includes a manhole frame, movable manhole sleeve, angle steel, curbstone mounting plate, and auxiliary disassembly and assembly components. It utilizes the elastic force of an energy storage spring to push the curbstone away from the mounting plate, reducing labor intensity and maintaining vertical force during disassembly to prevent the curbstone from shaking.
It reduced the labor intensity of workers, improved dismantling efficiency, avoided secondary damage to curb stones, and enhanced the overall strength and construction efficiency of curb stones.
Smart Images

Figure CN224078247U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of road engineering technology, specifically to an invisible manhole cover for inspection wells in green belts. Background Technology
[0002] Currently, during the construction of green belts and roads, conflicts often arise between the installation locations of road manholes and curb stones along the roadside. The manhole covers and curb stones are not on the same plane. To ensure the manhole covers can be opened for maintenance, it is usually necessary to ensure that the curb stones are straight during installation, while also ensuring that the curb stones above the manholes are separated from the manhole covers. However, when the manhole covers need to be opened, the curb stones in the area above the manholes must be removed. Because the curb stones in the area above the manholes and the road curb stones are continuously filled with cement during installation to ensure aesthetics and overall strength, the entire curb stone is integrated. This results in workers wasting manpower, materials, and construction time by removing the curb stones during manhole maintenance.
[0003] Therefore, it is necessary to invent an invisible manhole cover for inspection wells in green belts to solve the above problems. Utility Model Content
[0004] This utility model addresses the above-mentioned problems by providing an invisible manhole cover for inspection wells in green belts, which solves the problem of high labor intensity required when dismantling the curb stones above the inspection wells.
[0005] The technical solution adopted by this utility model is as follows: it includes a manhole frame, a movable manhole sleeve, angle steel, a curbstone mounting plate, and auxiliary disassembly and assembly components; the manhole frame is U-shaped and is connected to a pre-set U-shaped concrete ring beam around the manhole cover by multiple bolts; multiple movable manhole sleeves are configured, each connected to the manhole frame by multiple bolts; multiple angle steels are configured and welded to the four corners of the multiple movable manhole sleeves; multiple inverted T-shaped grooves are opened on the side wall of the movable manhole sleeve near the curbstone; the curbstone mounting plate is detachably installed on the outer side wall of the movable manhole sleeve near the curbstone, and its cross-section is L-shaped; multiple auxiliary disassembly and assembly components are configured and respectively set on the side of the curbstone mounting plate near the movable manhole sleeve.
[0006] Furthermore, as a preferred embodiment, the auxiliary assembly / disassembly component includes a clamping plate, a limiting plate, an energy storage spring, a limiting block, and a compression spring; the clamping plate is detachable and slidably disposed within the T-shaped groove; two limiting plates are symmetrically arranged and fixed to both sides of the clamping plate, and the distance between the curbstone mounting plate and the limiting plate is equal to the sidewall thickness of the movable manhole sleeve; the energy storage spring is connected to the lower end of the clamping plate; sliding grooves are formed on both sides of the lower end of the clamping plate; two limiting blocks are symmetrically arranged and slidably disposed within the two sliding grooves; two compression springs are arranged and connected between the limiting blocks and the inner wall of the sliding grooves, and the two limiting blocks are slidably disposed within the lower end of the T-shaped groove.
[0007] Furthermore, as a preferred embodiment, the inner walls of the movable well casing on both sides of the T-shaped groove are provided with embedding grooves, and multiple sealing plates are configured, which are detachably installed in the two embedding grooves of the movable well casing.
[0008] Advantages of this utility model:
[0009] By using auxiliary disassembly and assembly components, the elastic force of the energy storage spring can push the curbstone and curbstone mounting plate out first, making it easier for workers to directly remove the curbstone and curbstone mounting plate, reducing the labor intensity of workers, increasing the operation speed, and also avoiding secondary damage to the curbstone; moreover, when disassembling the curbstone, its thrust always remains vertically upward, avoiding the curbstone to be disassembled above the manhole from generating lateral shear force on the curbstone on the road surface, avoiding the curbstone of Luliang from shaking, thereby improving the overall strength of the curbstone.
[0010] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description
[0011] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0013] Figure 2 This is a schematic diagram of the curbstone mounting plate of this utility model.
[0014] Figure 3 This is a schematic diagram showing the structural location distribution of the auxiliary assembly and disassembly components of this utility model;
[0015] Figure 4 This is a schematic diagram of the auxiliary assembly / disassembly component structure of this utility model;
[0016] Figure 5 This is a top view of the overall structure of this utility model.
[0017] Reference numerals: 1. Manhole frame; 2. Movable manhole sleeve; 3. Angle steel; 4. Curbstone mounting plate; 5. Sealing plate; 6. Auxiliary disassembly and assembly components; 21. T-slot; 22. Embedded slot; 41. Threaded hole; 61. Clamping plate; 62. Limiting plate; 63. Energy storage spring; 64. Limiting block; 65. Compression spring; 611. Slide groove. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0019] In the description of this utility model, it should be understood 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.
[0020] refer to Figures 1 to 5 An invisible manhole cover for inspection wells in green belts includes a manhole frame 1, a movable manhole sleeve 2, angle steel 3, a curbstone mounting plate 4, and auxiliary disassembly and assembly components 6. The manhole frame 1 is U-shaped and is connected to a pre-set U-shaped concrete ring beam around the manhole cover by multiple bolts. Multiple movable manhole sleeves 2 are configured, each connected to the manhole frame 1 by multiple bolts. Multiple angle steel 3 are configured and welded to the four corners of multiple movable manhole sleeves 2. Multiple inverted T-shaped grooves 21 are opened on the side wall of the movable manhole sleeve 2 near the curbstone. The curbstone mounting plate 4 is detachably installed on the outer side wall of the movable manhole sleeve 2 near the curbstone, and its cross-section is L-shaped. Multiple auxiliary disassembly and assembly components 6 are configured and respectively set on the side of the curbstone mounting plate 4 near the movable manhole sleeve 2.
[0021] The curbstone mounting plate 4 has multiple threaded holes 41 for connecting to the curbstone with bolts. That is, after the curbstone mounting plate 4 is installed, the curbstone is placed on the curbstone mounting plate 4 and fixed to the side wall of the curbstone mounting plate 4 with multiple bolts. Then, a small amount of cement is used to fill the gaps between the multiple curbstones to ensure that the curbstone is linear and aesthetically pleasing.
[0022] In the above, the threaded hole 41 and the T-slot 21 are in the same vertical plane to avoid interference between the curbstone and the curbstone mounting plate 4 caused by the bolts during the installation of the curbstone.
[0023] In one embodiment of this utility model, the auxiliary disassembly and assembly component 6 includes a clamping plate 61, a limiting plate 62, an energy storage spring 63, a limiting block 64, and a compression spring 65. The clamping plate 61 is detachable and slidably disposed in the T-shaped groove 21. Two limiting plates 62 are symmetrically arranged and fixed on both sides of the clamping plate 61, and the distance between the curbstone mounting plate 4 and the limiting plate 62 is equal to the side wall thickness of the movable well sleeve 2. The energy storage spring 63 is connected to the lower end of the clamping plate 61. Sliding grooves 611 are opened inward on both sides of the lower end of the clamping plate 61. Two limiting blocks 64 are symmetrically arranged and slidably disposed in the two sliding grooves 611, respectively. Two compression springs 65 are arranged and connected between the limiting block 64 and the inner wall of the sliding groove 611, and the two limiting blocks 64 are slidably disposed in the lower end of the T-shaped groove.
[0024] Specifically, when installing the curbstone, the movable manhole sleeve 2 is first fixedly installed inside the manhole frame 1. Then, the worker pinches the limiting block 64 and moves the limiting block 64 into the sliding groove 611. At the same time, the side wall of the movable manhole sleeve 2 is placed in the space between the curbstone mounting plate 4 and the limiting plate 62. Then, with the help of an auxiliary pressing tool, the curbstone mounting plate 4 is pressed down until the limiting block 64 moves into the lower end of the T-shaped groove 21. Then, the elastic force of the compression spring 65 will push the two limiting blocks 64 to slide out of the sliding groove 611, thereby completely limiting the clamping plate 61 and the curbstone mounting plate 4. Then, the auxiliary pressing tool is removed, and at this time, the energy storage spring 63 is in a compressed energy storage state. Then, the curbstone is fixedly connected to the curbstone mounting plate 4 with bolts. Therefore, the intersection of the curbstone and the inspection well can be kept straight, while ensuring the installation strength of the curbstone.
[0025] It should be noted that in practice, after the movable well sleeve 2 is fixedly installed, the inside of the movable well sleeve 2 will be filled with soil to make the green belt appear continuous and beautiful. Therefore, the influence of the soil layer needs to be considered when dismantling the curbstone. In one embodiment of this utility model, the inner wall of the movable well sleeve 2 on both sides of the T-shaped groove 21 is provided with an embedding groove 22, and multiple sealing plates 5 are configured, which are detachably installed in the two embedding grooves 22 of the movable well sleeve 2.
[0026] In other words, after the curbstone is installed on the curbstone mounting plate 4, the sealing plate 5 needs to be inserted into the embedding groove 22 to prevent the soil from burying the auxiliary disassembly and assembly component 6.
[0027] When an inspection of the manhole is required, the curbstone and movable manhole sleeve 2 are disassembled and the manhole cover is opened. First, the worker uses a pry bar to move the limiting block 64 into the slide groove 611. Specifically, one end of the pry bar is pressed against the limiting block 64, and the middle of the pry bar is pressed against the upper end of the sealing plate 5. The upper end of the pry bar exerts force to move the limiting block 64. Then, the energy storage spring 63 releases energy, which will bounce the curbstone mounting plate 4 and the curbstone upwards a certain distance, so that the worker can directly remove the curbstone and the curbstone mounting plate 4. This reduces labor intensity, speeds up the operation, and avoids secondary damage to the curbstone. At the same time, it ensures that the curbstone above the manhole remains vertically upward during disassembly. That is to say, the curbstone above the manhole maintains an upward shearing force on the road curbstone during disassembly, avoiding the generation of lateral shearing force, thereby preventing the road curbstone from shaking. This improves the overall strength of the curbstone. Then, the soil layer is removed, and multiple bolts are removed, so that the manhole cover can be completely exposed. The disassembly work is thus completed.
[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A concealed manhole cover for inspection wells in green belts, characterized in that, The system includes a manhole frame (1), movable manhole sleeves (2), angle steel (3), curbstone mounting plate (4), and auxiliary disassembly and assembly components (6). The manhole frame (1) is U-shaped and is connected to a pre-set U-shaped concrete ring beam around the manhole cover by multiple bolts. Multiple movable manhole sleeves (2) are configured and are connected to the manhole frame (1) by multiple bolts. Multiple angle steel (3) are configured and are welded to the four corners of multiple movable manhole sleeves (2). Multiple inverted T-shaped grooves (21) are opened on the side wall of the movable manhole sleeve (2) near the curbstone. The curbstone mounting plate (4) is detachably installed on the outer side wall of the movable manhole sleeve (2) near the curbstone. Its cross-section is L-shaped. Multiple auxiliary disassembly and assembly components (6) are configured and are respectively set on the side of the curbstone mounting plate (4) near the movable manhole sleeve (2).
2. The concealed manhole cover for inspection wells in green belts according to claim 1, characterized in that, The auxiliary assembly / disassembly component (6) includes a clamping plate (61), a limiting plate (62), an energy storage spring (63), a limiting block (64), and a compression spring (65). The clamping plate (61) is detachable and slidably disposed in the T-shaped groove (21). Two limiting plates (62) are symmetrically arranged and fixed on both sides of the clamping plate (61). The distance between the curbstone mounting plate (4) and the limiting plate (62) is equal to the side wall thickness of the movable well sleeve (2). The energy storage spring (63) is connected to the lower end of the clamping plate (61). Sliding grooves (611) are opened inward on both sides of the lower end of the clamping plate (61). Two limiting blocks (64) are symmetrically arranged and slidably disposed in the two sliding grooves (611). Two compression springs (65) are arranged and connected between the limiting block (64) and the inner wall of the sliding groove (611). The two limiting blocks (64) are slidably disposed in the lower end of the T-shaped groove (21).
3. The concealed manhole cover for inspection wells in green belts according to claim 2, characterized in that, The inner walls of the movable well sleeves (2) on both sides of the T-shaped groove (21) are provided with embedding grooves (22), and multiple sealing plates (5) are provided, which are detachably installed in the two embedding grooves (22) of the movable well sleeves (2).