A self-compensating sealing ring for manhole covers

Abstract

The utility model relates to the technical field of well lid, concretely relates to a well lid crack self -compensation sealing ring, including spacing base, sliding seat and compensation layer, spacing base is circular, is used for providing support, sliding seat is installed on spacing base, compensation layer sets up between sliding seat and spacing base, compensation layer has the elasticity along spacing base radial, through setting up the compensation layer with radial elasticity between spacing base and sliding seat, make sliding seat can change with the gap or crack between well lid and well ring in radial direction and move automatically, thereby realize the adaptive compensation to crack.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover technology, specifically to a self-compensating sealing ring for manhole cover cracks. Background Technology

[0002] In municipal infrastructure construction, manhole covers are crucial components for ensuring the safety of road traffic and underground pipe networks. With frequent use of urban roads, increasing vehicle loads, and cyclical changes in temperature and humidity in the natural environment, manhole covers are prone to developing micro-cracks and gaps over long-term use. These cracks not only allow rainwater or sewage to seep into underground pipe networks but may also affect the stability of the fit between the manhole cover and the manhole ring, thus adversely impacting road safety and the operation of drainage systems.

[0003] Current technologies typically employ fixed sealing rings at the contact point between the manhole cover and the manhole ring, or use filling agents or rubber strips during installation to achieve a seal. While these methods may provide some initial effectiveness, as the materials age or deform under compression, the sealing layer cannot continuously compensate for changes in cracks, leading to seal failure. Furthermore, fixed seals lack adjustability, often failing to maintain stable sealing performance when relative displacement occurs between the manhole cover and the manhole ring.

[0004] In view of the above, in order to overcome the above technical problems, this utility model designs a self-compensating sealing ring for manhole cover cracks, which solves the above technical problems. Summary of the Invention

[0005] The technical objective of this invention is to provide a self-compensating sealing ring for manhole cover cracks, in order to solve the problem of sealing failure caused by relative displacement between the manhole cover and the manhole ring.

[0006] To achieve the above-mentioned technical objectives, this utility model provides the following technical solution: The self-compensating sealing ring for cracks in manhole covers provided by this utility model includes a limiting base, a sliding seat, and a compensation layer. The limiting base is annular and is used to provide support. The sliding seat is slidably installed on the limiting base. The compensation layer is disposed between the sliding seat and the limiting base, and the compensation layer has elasticity along the radial direction of the limiting base.

[0007] The sliding seat is arc-shaped and there are multiple sliding seats, which are slidably mounted on the limiting base through the circumferential array of the compensation layer.

[0008] Furthermore, a compensation groove is provided on the outer side of the sliding seat that contacts the limiting base, and a wedge-shaped installation groove is provided on the inner side of the sliding seat that contacts the manhole cover.

[0009] Preferably, the compensation groove is right-angled, and the compensation layer is filled inside the compensation groove.

[0010] The compensation layer is an inflatable elastic airbag, and the number of compensation layers is the same as the number of sliding seats, with each compensation layer corresponding to one sliding seat.

[0011] Furthermore, an adjustment gap is provided at an adjacent position of the plurality of sliding seats, and an air inlet is provided on the compensation layer at the adjustment gap, the air inlet being used to adjust the amount of air inside the compensation layer.

[0012] Furthermore, the limiting base is also equipped with a plurality of limiting buckles arranged in a circumferential array, the limiting buckles being used to limit the installation of the sliding seat.

[0013] Furthermore, the limiting buckle can slide along the circumference of the limiting base.

[0014] The beneficial effects of this utility model are as follows: 1. This utility model, by setting a compensation layer with radial elasticity between the limiting base and the sliding seat, enables the sliding seat to automatically move in the radial direction according to changes in the gap or crack between the manhole cover and the manhole ring, thereby achieving adaptive compensation for cracks. This structure utilizes the elastic restoring force of the compensation layer to continuously apply sealing pressure inwards. Even if the manhole cover experiences slight displacement due to load or environmental factors, it can maintain a stable sealing effect, effectively preventing rainwater or debris from seeping into the wellhead, and solving the problems of poor adaptability and insufficient compensation capacity of existing fixed sealing structures.

[0015] 2. The sliding seat of this utility model adopts an arc shape and is arranged in multiple units along the circumference. When each sliding seat is equipped with an inflatable elastic airbag as a compensation layer, independent sealing compensation can be achieved in different zones. By setting an adjustment gap between adjacent sliding seats and setting an inflation port on the airbag, the inflation volume of the compensation layer can be independently adjusted according to the stress and wear conditions of different areas of the manhole cover, thereby achieving targeted compensation and balanced sealing, significantly improving the flexibility and reliability of the device during long-term service.

[0016] 3. This utility model also features a compensation groove on the outer side of the sliding seat, filled with a compensation layer, and a wedge-shaped mounting groove on the inner side. This enhances the stability of the compensation layer and the sliding seat, preventing the compensation layer from detaching under stress. Furthermore, the limiting buckle on the limiting base constrains the sliding seat and allows it to slide circumferentially, ensuring stable guiding movement under stress. Through the synergistic effect of the compensation groove, mounting groove, and limiting buckle, the overall assembly firmness and operational stability are further improved, reducing sealing failures caused by component displacement. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art 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 from these drawings without creative effort.

[0018] The above and other aspects of the present invention will now be described by way of example only, with reference to the accompanying drawings, in which: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an enlarged schematic diagram of the adjustable gap of this utility model.

[0019] In the diagram: 1. Limiting base; 2. Sliding seat; 3. Compensation layer; 4. Compensation groove; 5. Installation groove; 6. Adjustment gap; 7. Inflation port; 8. Limiting buckle. Detailed Implementation

[0020] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0021] Example 1: like Figure 1 and Figure 2 As shown, the self-compensating sealing ring for manhole cover cracks in this embodiment includes a limiting base 1, a sliding seat 2, and a compensation layer 3. The limiting base 1 is a circular ring structure, integrally cast from cast iron, with bolt holes on its outer edge for fixing to the manhole cover ring with bolts. An annular slide is machined on the inner side of the limiting base 1 for installing the sliding seat 2. The sliding seat 2 is an arc segment unit, made of aluminum alloy through extrusion molding. Multiple sliding seats 2 are arranged in a circumferential array within the slide of the limiting base 1, allowing them to slide radially. Each sliding seat 2 has a wedge-shaped mounting groove 5 on its inner side for engaging with the outer edge of the manhole cover.

[0022] In this embodiment, the compensation layer 3 is located between the sliding seat 2 and the limiting base 1. It is an elastic strip made of silicone rubber and is installed by embedding it into the compensation groove 4 on the outside of the sliding seat 2 and contacting the limiting base 1. During assembly, the limiting base 1 is first fixed to the well ring, then the silicone rubber compensation layer 3 is placed into the slide rail. Subsequently, multiple sliding seats 2 are inserted into the slide rail in sequence, ensuring that the compensation layer 3 maintains tight contact with the sliding seats 2. Finally, the outer edge of the well cover is inserted into the mounting groove 5 of each sliding seat 2. When a gap appears between the well cover and the well ring, the compensation layer 3 provides radial elastic force to push the sliding seat 2, thereby achieving automatic compensation.

[0023] Example 2: In another embodiment, such as Figure 1 and Figure 2 As shown, in this embodiment, the compensation layer 3 is designed as an inflatable airbag. The limiting base 1 is a circular cast iron part with a slide rail on the inner side. The sliding seat 2 is arc-shaped and injection molded from reinforced nylon; multiple sliding seats 2 are arranged in a circumferential array in the slide rail, and an adjustment gap 6 is left between adjacent sliding seats 2.

[0024] In this embodiment, the compensation layer 3 is a rubber airbag made of EPDM rubber. Each airbag is installed correspondingly to a sliding seat 2, positioned between the compensation groove 4 of the sliding seat 2 and the limiting base 1. Each airbag has a brass inflation port 7 on its outer wall, located at the adjustment gap 6 and extending outwards for easy access to an external inflation device. During assembly, first place the airbag between the limiting base 1 and the sliding seat 2, then install the sliding seat 2 into the slide rail, ensuring the inflation port 7 is aligned with the adjustment gap 6. Finally, insert the manhole cover into the mounting groove 5 of the sliding seat 2. In use, the airbag is inflated through the inflation port 7 and maintains a certain pressure. The radial thrust generated by the airbag acts on the sliding seat 2, ensuring that the sliding seat 2 always presses against the outer edge of the manhole cover. By adjusting the inflation amount of each airbag, local gaps between the manhole cover and the manhole ring can be compensated.

[0025] Example 3: Based on the above embodiment one or two, in this embodiment, a plurality of limiting buckles 8 are arranged along the circumference of the limiting base 1. The limiting buckles 8 are formed by stamping stainless steel and are installed in the slide rail of the base. Each limiting buckle 8 can move a certain distance along the circumference of the base and is limited by the stop at the upper end.

[0026] During assembly, first install and fix the limiting buckle 8 on the outside of the limiting base 1. Then, embed the compensation layer 3 into the compensation groove 4 of the sliding seat 2. Push the sliding seat 2 into the slide rail and engage with the limiting buckle 8. Finally, insert the manhole cover into the mounting groove 5 of the sliding seat 2. During operation, the limiting buckle 8 provides positional constraint to the sliding seat 2 when it is under force, ensuring that the sliding seat 2 will not detach from the base during radial compensation. At the same time, the limiting position is adjusted by the circumferential sliding of the limiting buckle 8, thereby ensuring the balance of force and limiting of the sliding seat 2.

[0027] The description herein is provided to enable those skilled in the art to implement or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other variations without departing from the scope of the disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but should be given the broadest scope consistent with the principles and novel features disclosed herein.

[0028] Although the present disclosure has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to the embodiments of the present disclosure, which will be obvious to those skilled in the art. Therefore, such modifications or improvements made without departing from the spirit of the present disclosure are all within the scope of protection claimed by the present disclosure.

[0029] The above description is merely illustrative of this disclosure, and modifications may be made to the present invention in light of the above detailed description. The terminology used in the appended claims should not be construed as limiting the present invention to the specific embodiments disclosed in the specification. Rather, the scope of the present invention will be fully defined by the appended claims, which will be interpreted according to established principles of claim interpretation.

Claims

1. A self-compensating sealing ring for cracks in manhole covers, characterized in that, It includes a limiting base (1), a sliding seat (2) and a compensation layer (3). The limiting base (1) is annular and is used to provide support. The sliding seat (2) is slidably mounted on the limiting base (1). The compensation layer (3) is disposed between the sliding seat (2) and the limiting base, and the compensation layer (3) has elasticity along the radial direction of the limiting base (1).

2. The self-compensating sealing ring for cracks in manhole covers according to claim 1, characterized in that: The sliding seat (2) is arc-shaped and there are multiple sliding seats (2). The multiple sliding seats (2) are slidably mounted on the limiting base (1) through the circumferential array of the compensation layer (3).

3. The self-compensating sealing ring for cracks in manhole covers according to claim 2, characterized in that: The sliding seat (2) has a compensation groove (4) on the outer side that contacts the limiting base (1), and a wedge-shaped installation groove (5) is provided on the inner side that contacts the well cover.

4. The self-compensating sealing ring for cracks in manhole covers according to claim 3, characterized in that: The compensation groove (4) is right-angled, and the compensation layer (3) is filled in the compensation groove (4).

5. The self-compensating sealing ring for cracks in manhole covers according to claim 1, characterized in that: The compensation layer (3) is an inflatable elastic airbag. The number of compensation layers (3) is the same as the number of sliding seats (2), and each compensation layer (3) corresponds to one sliding seat (2).

6. The self-compensating sealing ring for cracks in manhole covers according to claim 5, characterized in that: An adjustment gap (6) is provided at an adjacent position of multiple sliding seats (2), and an air inlet (7) is provided on the compensation layer (3) at the adjustment gap (6). The air inlet (7) is used to adjust the amount of air inside the compensation layer (3).

7. The self-compensating sealing ring for cracks in manhole covers according to claim 1, characterized in that: The limiting base (1) is also equipped with a plurality of limiting buckles (8) arranged in a circular array. The limiting buckles (8) are used to limit the installation of the sliding seat (2).

8. The self-compensating sealing ring for cracks in manhole covers according to claim 7, characterized in that: The limiting buckle (8) can slide along the circumference of the limiting base (1).

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