Inspection well based on double sealing technology

Abstract

The invention discloses an inspection well based on a double-sealing technology, which comprises an inspection well body, the inspection well body comprises a prefabricated shaft, a well base and a connector structure, the prefabricated shaft is connected with the upper end of the well base, the connector structure is arranged on the side wall of the well base and connected with a pipeline, and the prefabricated shaft is connected with the well base. A double-sealing structure is arranged in the inspection well body; the double-sealing structure comprises a first-stage active sealing structure and a second-stage passive emergency sealing structure which are arranged independently. The first-stage active sealing structure comprises a socket type sealing structure formed at the interface structure and a main sealing rubber ring assembled in the sealing groove; and the second-stage passive emergency sealing structure comprises an annular hollow sealing cavity. By means of the mode, the inspection well based on the double-sealing technology is of a double-sealing structure, the leakage risk can be greatly reduced, the service life of the inspection well can be prolonged, and therefore the maintenance cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of municipal engineering technology, specifically relating to a manhole based on double sealing technology. Background Technology

[0002] Inspection wells are key structures in underground pipe networks used for connecting, inspecting, and cleaning pipes, and their long-term reliable sealing is of paramount importance.

[0003] Current inspection wells generally use a single seal, which is a rubber sealing ring installed at the interface between the well shaft and the pipeline. However, in complex underground environments, factors such as uneven ground settlement, traffic load vibration, thermal expansion and contraction of materials caused by temperature changes, and aging of the sealing ring itself can easily lead to the failure of this single seal. Once it fails, groundwater will seep into the pipe network in large quantities, increasing the load on sewage treatment plants. At the same time, sewage is prone to seepage, polluting the soil and groundwater, and repair is extremely difficult and costly. Summary of the Invention

[0004] The main technical problem solved by this invention is to provide a manhole based on dual sealing technology, which can significantly reduce the risk of leakage, extend the service life of the manhole, and thus reduce maintenance costs.

[0005] To solve the above-mentioned technical problems, the present invention adopts a technical solution as follows: providing a manhole based on double sealing technology, including a manhole body, the manhole body including a prefabricated well cylinder, a well base and an interface structure, the prefabricated well cylinder being connected to the upper end of the well base, the interface structure being disposed on the side wall of the well base and connected to a pipeline, and the manhole body being provided with a double sealing structure; The dual sealing structure includes a first-stage active sealing structure and a second-stage passive emergency sealing structure that are set independently of each other. The first-stage active sealing structure includes a socket-type sealing structure formed at the interface structure and a main sealing ring assembled in the sealing groove; The second-stage passive emergency sealing structure includes an annular hollow sealing cavity, which is disposed inside the body of the well base around the root of the interface structure and located on the axial inner side of the first-stage active sealing structure.

[0006] In a preferred embodiment of the present invention, the inner wall of the socket-type sealing structure is a wedge-shaped flared structure with an annular groove, and the shape of the main sealing ring matches the wedge-shaped flared structure and the annular groove.

[0007] In a preferred embodiment of the present invention, a closed-loop metal spring skeleton is embedded inside the main sealing ring.

[0008] In a preferred embodiment of the present invention, the inner wall of the hollow sealing cavity is made of a thin-walled structure layer, and the hollow sealing cavity is pre-filled with a water-swellable sealing strip.

[0009] In a preferred embodiment of the present invention, the thin-walled structural layer is a polyethylene film with a thickness between 0.5 mm and 2.0 mm.

[0010] In a preferred embodiment of the present invention, the connecting end faces of the precast well barrel and the well base are respectively provided with interlocking concave-convex connecting structures, and an annular water-swellable putty waterstop strip is provided in the fitting groove on the outer wall of the concave-convex connecting structure.

[0011] The beneficial effects of the present invention are: the present invention provides a manhole based on double sealing technology. The manhole adopts a double sealing structure, which can significantly reduce the risk of leakage, extend the service life of the manhole, and thus reduce maintenance costs. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of a manhole based on dual-sealing technology.

[0013] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0014] Figure 3 for Figure 1 A magnified view of a section at point B.

[0015] Figure 4 for Figure 1 A magnified view of a section at point C.

[0016] The components in the attached diagram are labeled as follows: 1. Precast well shaft; 2. Well base; 3. Interface structure; 4. Sealing groove; 5. Main sealing ring; 6. Hollow sealing cavity; 7. Thin-walled structural layer; 8. Water-swellable sealing strip; 9. Concave-convex connection structure; 10. Fitting groove; 11. Annular water-swellable putty sealing strip; 12. Metal spring skeleton; 13. Wedge-shaped flared structure. Detailed Implementation

[0017] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0018] Please see Figures 1 to 4The present invention includes: a manhole based on double sealing technology, comprising a manhole body, the manhole body comprising a prefabricated manhole casing 1, a manhole base 2, and an interface structure 3, the prefabricated manhole casing 1 being connected to the upper end of the manhole base 2, the interface structure 3 being disposed on the side wall of the manhole base 2 and connected to a pipeline, the manhole body being provided with a double sealing structure, which can significantly reduce the risk of leakage, extend the service life of the manhole, and thus reduce maintenance costs.

[0019] The dual sealing structure includes a first-stage active sealing structure and a second-stage passive emergency sealing structure that are set independently. The dual sealing structure creates two independent sealing barriers by combining the first-stage active sealing structure and the second-stage passive emergency sealing structure. Even if the main sealing ring 5 fails due to aging or displacement, the second-stage passive emergency sealing structure can be automatically activated to form a permanent water stop, which greatly improves the reliability and safety margin of the sealing system and effectively prevents long-term leakage.

[0020] The first-stage active sealing structure includes a socket-type sealing structure 4 formed at the interface structure 3 and a main sealing ring 5 assembled in the sealing groove 4, forming the first radial compression interface seal.

[0021] The second-stage passive emergency sealing structure includes an annular hollow sealing cavity 6. The hollow sealing cavity 6 is disposed inside the body of the well base 2 around the root of the interface structure 3 and is located on the axial inner side of the first-stage active sealing structure. The inner wall of the hollow sealing cavity 6 adopts a thin-walled structural layer 7. The hollow sealing cavity 6 is pre-filled with a water-swellable sealing strip 8. The thin-walled structural layer 7 is a polyethylene film with a thickness between 0.5 mm and 2.0 mm.

[0022] The hollow sealing cavity 6 is formed by pre-embedded mold shell during the pouring of concrete for the well base 2. It serves as a container for the water-swellable sealing strip 8 and is pre-embedded inside the structure, providing an independent and protected space for the second seal.

[0023] When external water seeps in through the failed first-stage active sealing structure, the water-swellable sealing strip 8 expands upon contact with water and can break through the thin-walled structural layer 7, expanding and filling the leakage path inside the interface structure 3 to form a second permanent self-expanding seal.

[0024] The water-swellable sealing strip 8 is the core functional material. It is stable under normal conditions, but once it comes into contact with leaking water, its volume expands rapidly, generating huge expansion pressure.

[0025] The thin-walled structural layer 7 has water permeability and acts like a trigger switch, separating the hollow sealed cavity 6 from channels where leakage may occur. Its strength is designed to be broken only by the pressure generated by the expanding material, thereby ensuring that the second-level system is precisely triggered only when needed, i.e. after the failure of the first-level active sealing structure.

[0026] The inner wall of the socket-type sealing structure 4 is a wedge-shaped flared structure 13 with an annular groove, and the shape of the main sealing ring 5 matches the wedge-shaped flared structure 13 and the annular groove.

[0027] The wedge-shaped flared structure 13 is used to provide guidance to facilitate pipe insertion, and during the insertion process, the main sealing ring 5 is squeezed by the inclined surface to achieve pre-tight sealing.

[0028] The annular groove engages with the protrusion on the main sealing ring 5 to prevent the main sealing ring 5 from rolling or shifting under pressure, thereby converting the axial extrusion force into a more effective radial sealing force and improving the pull-out resistance.

[0029] The main sealing ring 5, as the main elastic sealing element, relies on its own elastic recovery force and the contact stress generated by compression to maintain the static and dynamic sealing of the interface for a long time. The main sealing ring 5 has a closed-loop metal spring skeleton 12 embedded inside to enhance its resistance to permanent deformation.

[0030] The precast well shaft 1 and the well base 2 are respectively provided with interlocking concave-convex connection structures 9, and an annular water-swellable putty waterstop strip 11 is provided in the fitting groove 10 on the outer wall of the concave-convex connection structure 9.

[0031] The annular water-swellable putty sealing strip 11 provides a reliable seal at the joints of the well body itself, preventing groundwater from seeping in from non-pipeline interfaces. It is an important auxiliary structure to ensure the overall sealing integrity of the inspection well.

[0032] Compared with existing technologies, the present invention provides a manhole based on dual sealing technology. The manhole adopts a dual sealing structure, which can significantly reduce the risk of leakage, extend the service life of the manhole, and thus reduce maintenance costs.

[0033] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to 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 invention.

[0034] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A manhole based on dual-sealing technology, comprising a manhole body, the manhole body including a prefabricated well casing, a well base, and an interface structure, the prefabricated well casing being connected to the upper end of the well base, and the interface structure being disposed on the side wall of the well base and connected to a pipeline, characterized in that: The inspection well body is equipped with a double sealing structure; The dual sealing structure includes a first-stage active sealing structure and a second-stage passive emergency sealing structure that are set independently of each other. The first-stage active sealing structure includes a socket-type sealing structure formed at the interface structure and a main sealing ring assembled in the sealing groove; The second-stage passive emergency sealing structure includes an annular hollow sealing cavity, which is disposed inside the body of the well base around the root of the interface structure and located on the axial inner side of the first-stage active sealing structure.

2. The inspection well based on dual-sealing technology according to claim 1, characterized in that: The inner wall of the socket-type sealing structure is a wedge-shaped flared structure with an annular groove, and the shape of the main sealing ring matches the wedge-shaped flared structure and the annular groove.

3. A manhole based on dual-sealing technology according to claim 2, characterized in that: The main sealing ring has a closed-loop metal spring skeleton embedded inside.

4. A manhole based on dual-sealing technology according to claim 1, characterized in that: The inner wall of the hollow sealed cavity is made of a thin-walled structure layer, and the hollow sealed cavity is pre-filled with a water-swellable sealing strip.

5. A manhole based on dual-sealing technology according to claim 4, characterized in that: The thin-walled structural layer is a polyethylene film with a thickness between 0.5 mm and 2.0 mm.

6. A manhole based on dual-sealing technology according to claim 1, characterized in that: The precast well shaft and the well base are respectively provided with interlocking concave-convex connection structures on their connecting end faces, and an annular water-swellable putty waterstop strip is provided in the fitting groove on the outer wall of the concave-convex connection structure.

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