Plugging device for lower jacking pipe hole of steel casing

Abstract

The utility model discloses a steel casing lower jacking pipe hole plugging device which comprises an arc-shaped plate, the arc-shaped plate is tightly attached to the periphery of an upper hole of a working well, a compensation pipe is fixedly welded to the hole opening position of the arc-shaped plate, the inner diameter of the compensation pipe is consistent with the size of the hole, and the inner diameter of the compensation pipe is larger than that of the hole. A butt joint face is arranged at the end, close to the hole, of the compensation pipe, the butt joint face is attached to the inner wall of the working well, and a plugging assembly is arranged at the other end of the compensation pipe. According to the utility model, the arc-shaped plate and the compensation pipe are installed, so that the sealing of a plugging area can be realized, one end of the compensation pipe is attached to the well wall of the working well, the other end of the compensation pipe is a plain end, and the plugging assembly is installed on the compensation pipe, so that compared with a traditional plugging mechanism, the operation difficulty is smaller, the plugging effect is better, and the plugging efficiency is improved. The sealing gasket can improve the sealing performance of the joint between the compensation pipe and the plugging pipe, and the plugging performance of the plugging pipe can be further achieved through cooperation with the upper flange connecting assembly.

Description

Technical Field

[0001] This utility model relates to the field of underground pipeline construction technology, and in particular to a device for sealing the opening of a steel casing pipe jacking hole. Background Technology

[0002] Pipe jacking is a trenchless pipeline laying technique. It involves installing jacking equipment inside a working shaft and using a hydraulic jacking system to push pipe sections into the soil one by one, achieving precise underground pipeline installation. This technology offers advantages such as minimal impact on surface traffic, high construction efficiency, and controllable costs, making it particularly suitable for urban underground pipeline network construction. To ensure construction safety, the working shaft must employ support structures (such as sheet piles) to stabilize the surrounding soil and prevent groundwater from entering. Furthermore, the soil at the shaft entrance must be reinforced and sealed before jacking to prevent mud and water from flowing into the shaft, which could lead to surface subsidence or equipment damage.

[0003] Sheet pile support is a common method for supporting working shafts in pipe jacking projects. By driving sheet piles into the perimeter of the foundation pit to form a continuous cylindrical structure, it provides soil support and also serves as a seepage barrier. In areas with high groundwater levels, dewatering wells are also needed to lower the groundwater level and prevent water and sand inrush during tunneling. This support system effectively controls soil deformation, ensures the smooth advancement of the pipe jacking equipment, and minimizes the impact on surrounding buildings and pipelines, making it a key technical aspect for the safe implementation of pipe jacking construction.

[0004] Patent document CN221400527U discloses a sealing device for large-diameter pipe jacking construction openings; belonging to the field of pipe jacking construction technology; its key technical points include an installation plate, a fixing ring fixedly connected to one side of the installation plate, threaded rods threaded in a ring array inside the fixing ring, anti-overflow plates threaded to the outer side of each group of threaded rods, sealing blocks fixedly connected to the outer side of each group of anti-overflow plates, bevel gears fixedly connected to the end of each group of threaded rods away from the anti-overflow plates, a worm gear ring rotatably connected to the outer side of the fixing ring and the installation plate, a bevel tooth ring fixedly connected inside the worm gear ring and meshing with each group of bevel gears, a worm gear meshing with the outer side of the worm gear ring, and fixing blocks symmetrically rotatably connected to the outer side of the worm gear; this utility model aims to provide a sealing device for large-diameter pipe jacking construction openings; to improve the applicability of the entire device.

[0005] In the prior art of the aforementioned patent, the opening at the bottom of the working well on the side wall requires the installation of sheet piles. However, the size of the opening is generally larger than the sheet piles. In this case, it is necessary to fill the gap between the sheet piles and the opening wall. Moreover, the opening is not planar, and the area to be sealed is a curved surface. However, most of the sealing structures in the aforementioned devices and the prior art use planar sealing plates to seal the area, and then use annular sealing elements to seal the gap between the opening and the sheet piles. However, a large gap is generated between the planar sealing elements and the curved side wall, resulting in poor sealing effect. Utility Model Content

[0006] The purpose of this utility model is to provide a sealing device for the opening of the jacking pipe under the steel casing, so as to solve the above-mentioned shortcomings in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a steel casing jacking pipe opening sealing device, comprising an arc-shaped plate, the arc-shaped plate being tightly fitted around the opening of the working well, a compensating pipe being fixedly welded at the opening of the arc-shaped plate, the inner diameter of the compensating pipe being consistent with the size of the opening, one end of the compensating pipe near the opening being configured as a mating surface, the mating surface being fitted with the inner wall of the working well, a sealing component being provided at the other end of the compensating pipe, and a connecting component being provided between the sealing component and the compensating pipe.

[0008] As a further description of the above technical solution: a sealing element is fixedly installed on the edge of the arc-shaped plate, a sealing groove is opened on the inner wall of the working well, the sealing groove is sealed and connected with the sealing element, a fixed anchor rod is fixedly installed on the arc-shaped plate, and the arc-shaped plate and the working well are fixedly locked together by the fixed anchor rod.

[0009] As a further description of the above technical solution: the sealing assembly includes a sealing tube, the inner wall of the sealing tube and the compensation tube are in contact with each other, the edge of the sealing tube away from the hole extends outward with an extension, the side of the extension near the hole is provided with a groove, the groove is set as an annular groove, and the groove and the end of the compensation tube away from the hole are mutually inserted and adapted.

[0010] As a further description of the above technical solution: the connecting assembly includes a flange fixedly welded to the side wall of the compensating pipe, the extension has multiple flange holes, the multiple flange holes correspond to the flange holes on the flange, and a screw is connected between the flange holes on the extension and the flange holes on the flange, and nuts are threaded and locked at both ends of the screw.

[0011] As a further description of the above technical solution: a sealing layer is provided at the connection between the compensation pipe and the inner wall of the working well.

[0012] As a further description of the above technical solution: a sealing gasket is provided inside the groove, and the sealing gasket is arranged in annular shape and abuts against the compensation tube.

[0013] This utility model provides a sealing device for the opening of a steel casing pipe jacking tunnel. It has the following advantages: by installing the arc-shaped plate and the compensating pipe, a tight seal can be achieved over the sealing area. One end of the compensating pipe is flush with the well wall, while the other end is flat. By installing the sealing components on the compensating pipe, compared to traditional sealing mechanisms, its operation is easier and the sealing effect is better. The sealing gasket increases the sealing performance at the connection between the compensating pipe and the sealing pipe. Combined with the flange connection components, the sealing performance and connection stability of the sealing pipe can be further improved.

[0014] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0015] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a steel casing pipe jacking opening sealing device proposed in this utility model;

[0017] Figure 2 This is a three-dimensional exploded structural diagram of the present invention;

[0018] Figure 3 This is a top view schematic diagram of the three-dimensional exploded structure of this utility model;

[0019] Figure 4 This is a side sectional view of the present invention.

[0020] Figure 5 This is a top sectional view of the present invention.

[0021] Figure 6 This is a three-dimensional exploded structural diagram of the compensation pipe, sealing pipe and connecting components of this utility model.

[0022] Legend:

[0023] 1. Working well; 2. Opening; 3. Sealing groove; 4. Arc plate; 5. Sealing element; 6. Fixed anchor bolt; 7. Compensating pipe; 8. Butt joint surface; 9. Flange; 10. Sealing pipe; 11. Extension; 12. Screw; 13. Nut; 14. Groove; 15. Flange hole; 16. Sealing adhesive layer; 17. Sealing gasket. Detailed Implementation

[0024] 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Reference Figure 1-6 A sealing device for a steel casing jacking pipe opening 2 includes an arc-shaped plate 4, which is tightly fitted around the opening 2 in the working well 1. A compensating pipe 7 is fixedly welded to the opening of the arc-shaped plate 4. The inner diameter of the compensating pipe 7 is consistent with the size of the opening 2. One end of the compensating pipe 7 near the opening 2 is set as a mating surface 8, which is fitted with the inner wall of the working well 1. A sealing component is set at the other end of the compensating pipe 7, and a connecting component is set between the sealing component and the compensating pipe 7. The arc-shaped plate 4 includes a through hole. It can be made of sheet metal by stamping and die casting according to the curvature of the inner wall of the working well 1 and the size of the opening 2 to be sealed. By installing the arc-shaped plate 4 and the compensating pipe 7, the sealing area can be closed. One end of the compensating pipe 7 is fitted with the well wall of the working well 1, and the other end is flat. By installing the sealing component on the compensating pipe 7, the operation is easier and the sealing effect is better than that of traditional sealing mechanisms.

[0026] As a preferred technical solution of this embodiment, a sealing element 5 is fixedly installed on the edge of the arc plate 4, and a sealing groove 3 is opened on the inner wall of the working well 1. The sealing groove 3 and the sealing element 5 are sealed and connected. A fixing anchor rod 6 is fixedly installed on the arc plate 4, and the arc plate 4 and the working well 1 are fixedly locked together by the fixing anchor rod 6. The opening of the sealing groove 3 and the sealing element 5 can increase the sealing performance between the arc plate 4 and the opening 2.

[0027] As a preferred technical solution of this embodiment, the sealing component includes a sealing tube 10, which is in close contact with the inner wall of the compensation tube 7. The end of the sealing tube 10 away from the opening 2 has an extension 11 extending outward from its edge. The side of the extension 11 near the opening 2 has a groove 14, which is annular. The groove 14 and the end of the compensation tube 7 away from the opening 2 are interlocked and adapted to each other. Since the size of the opening 2 and the size of the filling pile are different at different construction sites, the gap between the opening wall and the filling pile is different. The thickness of the sealing tube 10 can be set according to the required sealing thickness, so that it can fit tightly with the opening wall and the filling pile. The groove 14 can realize the interlocking between the sealing tube 10 and the compensation tube 7, so that the connection between the sealing tube 10 and the compensation tube 7 is tighter.

[0028] As a preferred embodiment, the connecting assembly includes a flange 9 fixedly welded to the side wall of the compensating pipe 7. The extension 11 has a plurality of flange holes 15, which correspond to the flange holes 15 on the flange 9. A screw 12 is connected between the flange holes 15 on the extension 11 and the flange holes 15 on the flange 9. Nuts 13 are threaded and locked at both ends of the screw 12. The compensating pipe 7 and the sealing pipe 10 are connected by a flange, which can increase the sealing performance and the stability of the fixing between the sealing pipe 10 and the compensating pipe 7.

[0029] As a preferred technical solution in this embodiment, a sealing layer 16 is provided at the connection between the compensating pipe 7 and the inner wall of the working well 1. The compensating pipe 7 is mainly welded to the arc plate 4, and the mating surface 8 of the compensating pipe 7 is in close contact with the inner wall of the working well 1. The mating surface 8 and the working well 1 are connected by the sealing layer 16, which can increase the stability of the compensating pipe 7 and the working well 1 and increase the sealing between the compensating pipe 7 and the working well 1. The sealing layer 16 is a prior art technology and can be an epoxy resin adhesive, which is mainly used for the connection between various large-scale pipeline projects.

[0030] As a preferred technical solution in this embodiment, a sealing gasket 17 is provided inside the groove 14. The sealing gasket 17 is annular and abuts against the compensation pipe 7. The sealing gasket 17 can increase the sealing performance at the connection between the compensation pipe 7 and the sealing pipe 10. Combined with the flange connection assembly, the sealing performance and connection stability of the sealing pipe 10 can be further improved.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sealing device for the opening of a steel casing pipe jacking tunnel, comprising an arc-shaped plate (4), the arc-shaped plate (4) being tightly fitted around the opening (2) of the working shaft (1), characterized in that, A compensating pipe (7) is fixedly welded to the opening of the arc plate (4). The inner diameter of the compensating pipe (7) is consistent with the size of the opening (2). The end of the compensating pipe (7) near the opening (2) is set as a mating surface (8). The mating surface (8) is in contact with the inner wall of the working well (1). A sealing component is set at the other end of the compensating pipe (7). A connecting component is set between the sealing component and the compensating pipe (7).

2. The device for sealing the opening of a steel casing jacking pipe according to claim 1, characterized in that, A sealing element (5) is fixedly installed on the edge of the arc plate (4), and a sealing groove (3) is opened on the inner wall of the working well (1). The sealing groove (3) is sealed and connected with the sealing element (5). A fixed anchor rod (6) is fixedly installed on the arc plate (4), and the arc plate (4) and the working well (1) are fixedly locked together by the fixed anchor rod (6).

3. The device for sealing the opening of a steel casing jacking pipe according to claim 1, characterized in that, The sealing assembly includes a sealing tube (10), the inner wall of the sealing tube (10) and the compensation tube (7) are in contact with each other, the sealing tube (10) has an extension (11) extending outward from the edge of the end away from the opening (2), the extension (11) has a groove (14) on the side near the opening (2), the groove (14) is set as annular, and the groove (14) and the end of the compensation tube (7) away from the opening (2) are mutually inserted and adapted.

4. The device for sealing the opening of a steel casing jacking pipe according to claim 3, characterized in that, The connecting assembly includes a flange (9) fixedly welded to the side wall of the compensating pipe (7). The extension (11) has multiple flange holes (15), which correspond to the flange holes (15) on the flange (9). A screw (12) is connected between the flange holes (15) on the extension (11) and the flange holes (15) on the flange (9). Nuts (13) are threaded and locked at both ends of the screw (12).

5. The device for sealing the opening of a steel casing jacking pipe according to claim 1, characterized in that, A sealing layer (16) is provided at the connection between the inner wall of the compensation pipe (7) and the working well (1).

6. The device for sealing the opening of a steel casing jacking pipe according to claim 3, characterized in that, A sealing gasket (17) is provided inside the groove (14). The sealing gasket (17) is annular and abuts against the compensation tube (7).

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