A waterproof and antimagnetic cable tunnel jacking pipe
By installing an antimagnetic layer on the inner wall of the cable tunnel jacking pipe and a multi-layered waterproof structure on the outer wall, combined with a sealing flange and a temperature sensor system, the problems of waterproofing and antimagnetic protection in cable tunnels under complex geological conditions have been solved, achieving stable signal transmission and comprehensive waterproof protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGHAI TIANHUI ELECTRIC POWER DESIGN CONSULTING CO LTD
- Filing Date
- 2025-07-17
- Publication Date
- 2026-06-30
AI Technical Summary
Existing cable tunnels are not waterproof under complex geological conditions and lack sufficient anti-magnetic measures, resulting in water penetration and magnetic field interference causing unstable signal transmission.
An antimagnetic layer is installed on the inner wall of the cable tunnel jacking pipe, and a multi-layer waterproof structure is installed on the outer wall, including waterproof layer C, waterproof layer B and waterproof layer A. Sealing flanges are installed at both ends of the pipe, and temperature sensors and control systems are used for real-time monitoring.
It effectively prevents moisture penetration, enhances waterproofing, isolates magnetic field interference, ensures cable transmission stability and waterproof protection, and adapts to complex geological and electromagnetic conditions.
Smart Images

Figure CN224438517U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cable laying equipment technology, and in particular to a waterproof and antimagnetic cable tunnel jacking pipe. Background Technology
[0002] Pipe jacking, a trenchless pipeline laying method, is widely used in cable tunnel construction. However, in waterproofing, groundwater and rainwater can infiltrate the tunnel, causing cables to become damp or short-circuit, affecting their normal function and potentially leading to safety accidents. Traditional pipe jacking waterproofing methods are ineffective in complex geological conditions and struggle to prevent moisture penetration. Regarding electromagnetic interference, numerous sources in cities, such as high-voltage power lines, transformers, and communication equipment, can interfere with cable signal transmission, reducing transmission efficiency and stability.
[0003] Prior art document CN215633001U achieves waterproofing at pipe connections through sealing rings and water-guiding channels, but its overall waterproofing structure is relatively simple and lacks multi-layered protection. Under high water pressure or complex geological conditions, leakage may still occur. With the increasing density of urban power facilities, cable tunnels are susceptible to interference from external magnetic fields, leading to unstable signal transmission. However, current technologies lack effective anti-magnetic measures. While the prior art document achieves non-drilling reinforcement through metal support rings and through-holes, avoiding damage to the pipe structure, it does not integrate the reinforcement structure with the waterproofing design, which may affect the overall waterproofing performance. Utility Model Content
[0004] The present invention aims to solve the problems mentioned in the background art by providing a waterproof and antimagnetic cable tunnel jacking pipe to address the aforementioned technical issues.
[0005] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: a waterproof and antimagnetic cable tunnel jacking pipe, comprising a pipe body, wherein an antimagnetic layer is provided on the inner wall of the pipe body; a waterproof structure is provided on the outer wall of the pipe body; and sealing flanges are provided at both ends of the pipe body.
[0006] Furthermore, the waterproof structure comprises, from the inside out, a waterproof layer C, a waterproof layer B, and a waterproof layer A; the waterproof layer C is sprayed and wrapped around the outer wall of the pipe; the waterproof layer B is a waterproof membrane wrapped around the waterproof layer C; the waterproof layer A is sprayed and wrapped around the waterproof layer C; and a temperature sensor is embedded inside the waterproof structure.
[0007] Furthermore, the sealing flange is welded to the pipe opening of the connecting pipe body; a groove is provided on one side surface of the sealing flange; a sealing ring is fitted inside the groove.
[0008] Furthermore, the temperature sensor is connected to the controller via data; the controller is equipped with a display screen and a control panel; and the controller is connected to an alarm via data.
[0009] Furthermore, the waterproof layer C is a polyurethane waterproof coating layer, and the waterproof layer A is an acrylic waterproof coating layer.
[0010] Furthermore, the antimagnetic layer is made of permalloy material.
[0011] Compared with the prior art, this utility model has the following advantages:
[0012] This structure effectively prevents moisture from penetrating the pipe's interior by installing a waterproof layer on the outer wall. This multi-layered waterproof layer enhances its waterproofing capabilities, while a humidity sensor continuously monitors the pipe, facilitating timely maintenance and ensuring comprehensive waterproof protection. Furthermore, the anti-magnetic layer on the inner wall effectively isolates external magnetic fields from interfering with the cables. Sealing flanges at both ends of the pipe further enhance its waterproofing effect. The pipe's simple structural design facilitates construction and can adapt to various complex geological and electromagnetic conditions. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structural split of this utility model;
[0014] Figure 3 This is a schematic diagram of the AA cross-section of this utility model;
[0015] Figure 4 This is a schematic diagram of the control system of this utility model.
[0016] Legend: 1-Pipe body, 2-Sealing flange, 3-Groove, 4-Sealing ring, 5-Temperature sensor, 6-Waterproof layer A, 7-Waterproof layer B, 8-Waterproof layer C, 9-Antimagnetic layer, 10-Controller, 1001-Display screen, 1002-Control panel, 11-Alarm. Detailed Implementation
[0017] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this utility model: A waterproof and antimagnetic cable tunnel jacking pipe includes a pipe body 1, the inner wall of which is provided with an antimagnetic layer 9; the antimagnetic layer 9 is made of permalloy material, which can effectively shield the interference of external magnetic fields on the cable. Permalloy has a high magnetic permeability and can effectively absorb and shield magnetic fields, improving the transmission efficiency and stability of the cable; the outer wall of the pipe body 1 is provided with a waterproof structure, which includes a waterproof layer C8, a waterproof layer B7 and a waterproof layer A6 from the inside to the outside, forming a multi-layer waterproof structure and improving the waterproof effect; the waterproof layer C8 is sprayed and wrapped on the outer wall of the pipe body 1, tightly bonded to the surface of the pipe body 1, filling the tiny gaps on the surface of the pipe body 1; the waterproof layer B7 is a waterproof roll material, wrapped on the waterproof layer C8. On the water layer C8, the waterproof layer B7 has good flexibility and tensile strength, and can adapt to the deformation of the pipe body; the waterproof layer A6 is sprayed and wrapped on the waterproof layer C8, which can further enhance the waterproof effect and at the same time protect the waterproof membrane layer; the waterproof layer C8 is a polyurethane waterproof coating layer, and the waterproof layer A6 is an acrylic waterproof coating layer; the waterproof structure is embedded with a temperature sensor 5 for continuous monitoring, which facilitates timely maintenance and ensures comprehensive waterproof protection; sealing flanges 2 are provided at both ends of the pipe body 1; the sealing flanges 2 are welded to the pipe openings of the pipe body 1; a groove 3 is provided on one side surface of the sealing flange 2; a sealing ring 4 is fitted inside the groove 3. The sealing ring in the sealing flange is made of EPDM rubber material, which has good aging resistance, corrosion resistance and sealing performance, and can effectively prevent water from seeping in from both ends of the pipe body.
[0018] Specifically, the temperature sensor 5 is connected to the controller 10 via data connection; the controller 10 is equipped with a display screen 1001 and a control panel 1002; the controller 10 is connected to an alarm 11 via data connection, which can monitor humidity in real time and transmit data to the controller 10. If the humidity is too high, it will be displayed on the display screen 1001 and the alarm 11 will sound at the same time. The staff can carry out timely maintenance according to the pipe section displayed on the control panel 1002.
[0019] In use, first place pipe body 1 in the predetermined position, then apply waterproof layer C8 to the outer wall of pipe body 1. After waterproof layer C8 dries, lay waterproof layer B7, and then apply waterproof layer A6 to the outside of waterproof layer B7. Multiple temperature sensors 5 are distributed within the waterproof structure. The controller 10 can monitor the humidity changes of the waterproof layer in real time. When the humidity is too high, the alarm 11 sounds. Personnel can determine the exact location through the display screen 1001 and control panel 1002, and dispatch maintenance personnel for accurate repair. An anti-magnetic layer 9 is pasted on the inner wall of pipe body 1. Finally, install sealing flanges 2 at both ends of pipe body 1, place sealing rings 4 in the grooves 3 of the sealing flanges 2, and then connect the sealing flanges 2 of the two pipe bodies 1 with bolts to ensure the sealing performance of the sealing flanges 2.
[0020] 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 its improved concept should be covered within the protection scope of the present utility model.
Claims
1. A waterproof and magnetically shielded cable tunnel jacking pipe comprising a pipe body (1), characterized in that: The inner wall of the pipe body (1) is provided with an antimagnetic layer (9); the outer wall of the pipe body (1) is provided with a waterproof structure, and sealing flanges (2) are provided at both ends of the pipe body (1); the waterproof structure includes, from the inside to the outside, a waterproof layer C. (8) Waterproof layer B (7) and waterproof layer A (6); the waterproof layer C (8) is sprayed and wrapped around the pipe body. (1) On the outer pipe wall; the waterproof layer B (7) is a waterproof roll material, wrapped on the waterproof layer C (8); the waterproof layer A (6) is sprayed and wrapped on the waterproof layer C (8); the waterproof structure is embedded with a temperature sensor (5); the sealing flange (2) is welded to the pipe opening of the connecting pipe body (1); a groove (3) is provided on one side surface of the sealing flange (2); a sealing ring (4) is fitted inside the groove (3); the temperature sensor (5) is connected to the controller (10) for data; the controller (10) is provided with a display screen (1001) and a control panel (1002); the controller (10) is connected to an alarm (11) for data; the waterproof layer C (8) is a polyurethane waterproof coating layer, the waterproof layer A (6) is an acrylic waterproof coating layer; the antimagnetic layer (9) is made of permalloy material.