A concrete inspection well cover

Abstract

This utility model discloses a concrete manhole cover, belonging to the field of manhole cover technology. It includes a main body, with a manhole cover body rotatably connected to the outer surface of the main body. The manhole cover body is movably fitted against the inner walls on both sides of the main body. A connecting component for opening and closing the manhole cover body is provided between the main body and the manhole cover body. Reinforcing components are provided on the outer surface and inside of the manhole cover body to enhance its strength. High-pressure gas drives the piston rod to extend and retract, providing continuous lifting force, reducing manual lifting effort, making it particularly suitable for single-person operation. It forms a stable four-bar linkage with the pneumatic strut, ensuring smooth lifting and lowering of the manhole cover body without the risk of tilting. When opened to the maximum angle, the pneumatic strut's self-locking valve closes, achieving rigid suspension. When closed, the locking pin automatically retracts under pressure from the inner wall of the connecting groove, and after reaching its position, a spring pops out to form a rigid locking. Unlocking is achieved by pulling the lever to trigger the retraction of the locking pin. Operation is simple and safe.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover technology, and more specifically, to a concrete manhole cover plate. Background Technology

[0002] In the field of municipal infrastructure, manhole covers are key components for covering manholes in underground pipeline systems (such as drainage, electricity, and communications), and their performance is directly related to road safety, facility protection, and operation and maintenance efficiency.

[0003] Patent CN216075252U discloses a concrete manhole cover, comprising a hollow cylinder and a hinge mechanism. The hollow cylinder is pre-embedded in a municipal pipeline pit. A pair of reinforcing rings are fitted around the upper and lower ends of the hollow cylinder. Concrete is poured between the outer surface of the hollow cylinder and the municipal pipeline pit. A concrete pouring ring is located at the top of the upper reinforcing ring, and a hollow manhole cover is placed inside the concrete pouring ring. The hollow cylinder is connected to the hollow manhole cover via the hinge mechanism. This utility model solves the problems of inconvenient opening and closing of manhole covers and poor sealing through the coordinated use of various mechanisms. The overall structure is compact, and the automatic control of the manhole cover's opening and closing via electric drive reduces the workload of workers. Multiple reinforcements and seals further improve the sealing performance of the manhole cover.

[0004] Although the device has many beneficial effects, the following problems still exist: Although the manhole cover plate has improved the sealing performance of the manhole cover through multiple reinforcements and seals, the traditional cover plate is heavy, requires multiple people to cooperate or mechanical assistance to open, and is inconvenient and inefficient to operate. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a concrete manhole cover that solves the aforementioned problems.

[0007] (II) Technical Solution

[0008] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a concrete manhole cover, comprising a main body, a manhole cover body rotatably connected to the outer surface of the main body, the manhole cover body being movably fitted to the inner walls on both sides of the main body, a connecting assembly for opening and closing the manhole cover body being provided between the main body and the manhole cover body, a reinforcing assembly for strengthening the manhole cover body being provided on the outer surface and inside of the manhole cover body, the connecting assembly including a support rod and a pneumatic strut, a support rod rotatably connected to the inner walls on both sides of the main body, two pneumatic struts rotatably connected to the inner wall of the main body, the ends of the two pneumatic struts being hinged to the outer surface of the manhole cover body, and the other ends of the two support rods being rotatably connected to the outer surface of the corresponding pneumatic strut.

[0009] Preferably, the connecting assembly further includes a connecting groove, a connecting post, a snap-fit ​​post, a limiting groove, and a spring. Multiple equidistantly distributed connecting posts are fixedly connected to the outer surface of the manhole cover plate body close to the main body. Multiple equidistantly distributed connecting grooves are opened inside the main body. Multiple connecting posts are movably fitted and inserted into the corresponding connecting grooves. Two limiting grooves are opened on both outer surfaces of each connecting post. A snap-fit ​​post is slidably connected inside each of the two limiting grooves. The snap-fit ​​post is hollow and located inside the connecting post. Springs are elastically connected to both sides of each connecting post, and the springs are all located inside the snap-fit ​​post.

[0010] Preferably, the two snap-fit ​​posts are movably snapped into the corresponding connecting slots.

[0011] Preferably, the reinforcing component includes a reinforcing plate, a tie rod, and reinforcing ribs. Multiple equidistant and longitudinally and transversely distributed reinforcing ribs are fixedly connected inside the manhole cover body. The manhole cover body is filled with concrete. Reinforcing plates are fixedly connected to both corners of the manhole cover body. Both reinforcing plates are arranged in an L-shape. A tie rod is fixedly connected between the two reinforcing plates.

[0012] Preferably, the outer surface of the manhole cover plate body close to the main body is fixedly connected with a plurality of equally spaced reinforcing blocks, the plurality of reinforcing blocks are arranged in a "U" shape, and the plurality of reinforcing blocks are located between two pneumatic struts.

[0013] Preferably, the outer surface of the manhole cover plate body that is opposite to the main body has multiple equidistant and longitudinally distributed anti-slip patterns.

[0014] Preferably, a rubber pad is fixedly connected to the outer surface of the manhole cover plate body that is close to the main body.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, the present invention provides a concrete manhole cover plate, which has the following beneficial effects:

[0017] 1. This type of concrete manhole cover uses high-pressure gas to push the piston rod to extend and retract, providing continuous lifting force and reducing manual lifting force, making it especially suitable for single-person operation. It forms a stable four-bar linkage with the pneumatic strut, ensuring that the manhole cover body is raised and lowered smoothly without the risk of tilting. When opened to the maximum angle, the self-locking valve of the pneumatic strut closes, achieving rigid suspension. When closed, the locking column is automatically retracted by the pressure of the inner wall of the connecting groove. After reaching the position, the spring pops out to form a rigid locking. When unlocking, the locking column is triggered to retract by pulling the pull rod. The operation is simple and safe. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This utility model Figure 1 Enlarged view of the structure at point A in the middle;

[0020] Figure 3 This is a side view of the structure of this utility model;

[0021] Figure 4 This utility model Figure 3 Enlarged view of the structure at point B in the middle;

[0022] Figure 5 This is a schematic diagram of the spring structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the reinforcing rib mechanism of this utility model.

[0024] In the diagram: 1. Main body; 2. Manhole cover plate body; 3. Connecting groove; 4. Supporting rod; 5. Anti-slip texture; 6. Reinforcing plate; 7. Tie rod; 8. Pneumatic strut; 9. Reinforcing block; 10. Rubber pad; 11. Connecting column; 12. Snap-fit ​​column; 13. Limiting groove; 14. Spring; 15. Reinforcing rib. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-6 This utility model provides a technical solution:

[0027] A concrete manhole cover includes a main body 1, with a manhole cover body 2 rotatably connected to the outer surface of the main body 1. The manhole cover body 2 is movably fitted to the inner walls on both sides of the main body 1. A connecting assembly for opening and closing the manhole cover body 2 is provided between the main body 1 and the manhole cover body 2. Reinforcing assemblies for strengthening the manhole cover body 2 are provided on the outer surface and inside. The connecting assembly includes support rods 4 and pneumatic struts 8. Support rods 4 are rotatably connected to the inner walls on both sides of the main body 1, and two pneumatic struts 8 are rotatably connected to the inner walls of the main body 1. The end is hinged to the outer surface of the manhole cover body 2, and the other end of the two support rods 4 is rotatably connected to the outer surface of the corresponding pneumatic struts 8. The inclined surface of the locking column 12 is squeezed by the inner wall of the connecting groove 3, and the spring 14 is compressed again and retracted into the connecting column 11, disengaging from the locking groove. The connecting column 11 slides out of the connecting groove 3, the mechanical lock is released, and when the manhole cover body 2 moves upward, the pneumatic struts 8 hinged between the main body 1 and the manhole cover body 2 begin to extend. The high-pressure gas inside the pneumatic struts 8 pushes the piston rod to extend, providing continuous lifting force and greatly reducing the manual lifting force. The support rods 4 rotate with the movement of the pneumatic struts 8, forming a stable four-bar linkage mechanism to ensure that the manhole cover body 2 rises smoothly without tilting. When the manhole cover body 2 is opened to the maximum angle, the pneumatic struts 8 are in the fully extended state.

[0028] Furthermore, the connecting assembly also includes a connecting groove 3, a connecting post 11, a snap-fit ​​post 12, a limiting groove 13, and a spring 14. Multiple equidistantly distributed connecting posts 11 are fixedly connected to the outer surface of the manhole cover plate body 2 close to the main body 1. Multiple equidistantly distributed connecting grooves 3 are opened inside the main body 1. Multiple connecting posts 11 are movably fitted and inserted into the corresponding connecting grooves 3. Two limiting grooves 13 are opened on both sides of the outer surface of the connecting post 11. Snap-fit ​​posts 12 are slidably connected inside the two limiting grooves 13. The snap-fit ​​posts 12 are hollow and located inside the connecting post 11. Springs 14 are elastically connected to both sides of the connecting post 11. The springs 14 are located inside the snap-fit ​​posts 12. When the manhole cover plate body 2 is closed, the connecting posts 11 on its surface are inserted into the connecting grooves 3 of the main body 1. The snap-fit ​​posts 12 inside the connecting post 11 are squeezed by the inner wall of the connecting groove 3 and slide along the limiting groove 13 into the connecting post 11.

[0029] Furthermore, the two locking posts 12 are movably locked with the corresponding connecting grooves 3, and the spring 14 releases its elastic force, pushing the locking posts 12 outward to form a rigid locking with the connecting grooves 3, thereby achieving a firm lock on the manhole cover body 2.

[0030] Furthermore, the reinforcing components include reinforcing plates 6, tie rods 7, and reinforcing ribs 15. Multiple equidistant and longitudinally and transversely distributed reinforcing ribs 15 are fixedly connected inside the manhole cover body 2. The manhole cover body 2 is filled with concrete. Reinforcing plates 6 are fixedly connected at both corners of the manhole cover body 2. Both reinforcing plates 6 are L-shaped. Tie rods 7 are fixedly connected between the two reinforcing plates 6. The concrete inside the cover, the reinforcing ribs 15, and the anti-slip texture 5 on the surface jointly bear the external load, significantly improving the bending strength and meeting the requirements of heavy-duty vehicle crushing.

[0031] Furthermore, multiple equidistant reinforcing blocks 9 are fixedly connected to the outer surface of the manhole cover plate body 2 that is close to the main body 1. The multiple reinforcing blocks 9 are arranged in a "U" shape and are located between two pneumatic struts 8. The reinforcing blocks 9 are used to enhance the supporting force of the manhole cover plate body 2.

[0032] Furthermore, the outer surface of the manhole cover plate body 2, which is opposite to the main body 1, is provided with multiple equidistant and longitudinally distributed anti-slip patterns 5 to prevent pedestrians and vehicles from slipping.

[0033] Furthermore, a rubber pad 10 is fixedly connected to the outer surface of the manhole cover plate body 2 that is close to the main body 1. The rubber pad 10 on the contact surface between the manhole cover plate body 2 and the main body 1 is compressed and deformed to fill the gaps and improve the sealing and shock absorption effect.

[0034] Working principle: When the worker needs to use the concrete manhole cover, when the manhole cover body 2 is closed, the connecting post 11 on its surface is inserted into the connecting groove 3 of the body 1. The locking post 12 inside the connecting post 11 is squeezed by the inner wall of the connecting groove 3 and slides along the limiting groove 13 into the connecting post 11, compressing the spring 14. When the locking post 12 moves to the locking position of the connecting groove 3, the spring 14 releases its elastic force, pushing the locking post 12 outward to form a rigid locking with the connecting groove 3, thus achieving a firm lock on the manhole cover body 2. The rubber pad 10 on the contact surface between the manhole cover body 2 and the body 1 is compressed and deformed, filling the gaps and improving the sealing and shock absorption effect. The cover body has internal concrete + reinforcing ribs 15 and surface anti-slip texture 5. Together, they bear the external load, significantly improving bending strength and meeting the requirements of heavy-duty vehicle crushing. When the operator pulls the lever 7 upwards, the connecting column 11 is subjected to tension. The inclined surface of the locking column 12 is squeezed by the inner wall of the connecting groove 3, and the spring 14 is compressed again to retract into the connecting column 11, disengaging from the locking groove. The connecting column 11 slides out of the connecting groove 3, the mechanical lock is released, and when the manhole cover body 2 moves upwards, the pneumatic strut 8, hinged between the main body 1 and the manhole cover body 2, begins to extend. The high-pressure gas inside the pneumatic strut 8 pushes the piston rod to extend, providing continuous lifting force and greatly reducing the manual lifting force, supporting the connecting rod 4. The pneumatic strut 8 rotates with the movement of the pneumatic strut 8, forming a stable four-bar linkage mechanism to ensure that the manhole cover body 2 rises smoothly without tilting. When the manhole cover body 2 is opened to its maximum angle, the pneumatic strut 8 is in a fully extended state. Its internal self-locking valve closes by an external button or built-in mechanism, cutting off the airflow channels in the two chambers of the cylinder. The incompressibility of the gas rigidly locks the cover, making it stable and suspended. The support link 4 and the pneumatic strut 8 form a triangular support structure, distributing the self-weight load of the manhole cover body 2 and preventing accidental closure. Triggering the button on the pneumatic strut 8 opens the internal valve, allowing gas flow. When the operator gently presses the manhole cover body 2, the pneumatic strut 8 is compressed and shortened. The internal gas flow generates a damping effect, achieving slow closure and avoiding impact damage. The support link 4 rotates synchronously, guiding the manhole cover body 2 to accurately return to its position. At the moment the manhole cover body 2 closes, the connecting post 11 inserts into the connecting groove 3, and the locking post 12 pops out under the action of the spring 14, completing the automatic locking.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A concrete manhole cover, comprising a main body (1), characterized in that: The outer surface of the main body (1) is rotatably connected with a manhole cover body (2). The manhole cover body (2) is movably fitted with the inner walls on both sides of the main body (1). A connecting component for opening and closing the manhole cover body (2) is provided between the main body (1) and the manhole cover body (2). The outer surface and the interior of the manhole cover body (2) are provided with a strengthening component for strengthening the strength of the manhole cover body (2). The connecting component includes a support connecting rod (4) and a pneumatic strut (8). The support connecting rods (4) are rotatably connected to the inner walls on both sides of the main body (1). Two pneumatic struts (8) are rotatably connected to the inner wall of the main body (1). The ends of the two pneumatic struts (8) are hinged to the outer surface of the manhole cover body (2). The other ends of the two support connecting rods (4) are rotatably connected to the outer surfaces of the corresponding pneumatic struts (8).

2. A concrete manhole cover according to claim 1, characterized in that: The connecting component further includes a connecting groove (3), a connecting column (11), a clamping column (12), a limiting groove (13), and a spring (14). A plurality of equally spaced connecting columns (11) are fixedly connected to the outer surface of the manhole cover body (2) close to the main body (1). A plurality of equally spaced connecting grooves (3) are formed inside the main body (1). The plurality of connecting columns (11) are movably fitted and inserted into the corresponding connecting grooves (3). Two limiting grooves (13) are formed on both outer surfaces of the connecting column (11). Two clamping columns (12) are slidably connected to the inside of the two limiting grooves (13). The clamping column (12) is hollow and located inside the connecting column (11). Springs (14) are elastically connected to both sides of the connecting column (11). The springs (14) are located inside the clamping column (12).

3. A concrete manhole cover according to claim 2, characterized in that: The two clamping columns (12) are movably clamped with the corresponding connecting grooves (3).

4. A concrete manhole cover according to claim 1, characterized in that: The strengthening component includes a reinforcing plate (6), a tension rod (7), and a reinforcing rib (15). A plurality of equally spaced and vertically and horizontally distributed reinforcing ribs (15) are fixedly connected to the inside of the manhole cover body (2). Concrete is provided inside the manhole cover body (2). Reinforcing plates (6) are fixedly connected to both corners of the manhole cover body (2). The two reinforcing plates (6) are both L-shaped. A tension rod (7) is fixedly connected between the two reinforcing plates (6).

5. A concrete manhole cover according to claim 1, characterized in that: A plurality of equally spaced reinforcing blocks (9) are fixedly connected to the outer surface of the manhole cover body (2) close to the main body (1). The plurality of reinforcing blocks (9) are in a "U" shape. The plurality of reinforcing blocks (9) are located between the two pneumatic struts (8).

6. A concrete manhole cover according to claim 1, characterized in that: A plurality of equally spaced and vertically and horizontally distributed anti-slip patterns (5) are formed on the outer surface of the manhole cover body (2) facing away from the main body (1).

7. A concrete manhole cover according to claim 1, characterized in that: A rubber pad (10) is fixedly connected to the outer surface of the manhole cover body (2) close to the main body (1).

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