CN-116519696-B - Underground cable breakpoint detection device and method

CN116519696BCN 116519696 BCN116519696 BCN 116519696BCN-116519696-B

Abstract

The invention belongs to the technical field of underground cables, and particularly discloses an underground cable breakpoint detection device and method, wherein the device comprises a placement pipeline and a camera unit, a cable is placed in the placement pipeline, the camera unit comprises a track, a rail car and a camera, the track sets up on settling the pipeline inner wall, and the railcar is connected with the track removal, and the camera is installed on the railcar, and the camera is towards cable place side, and the control end of railcar is connected with control button through wireless transmission unit. By adopting the technical scheme, the camera shooting unit is utilized to carry out camera shooting detection on the cable, so that the condition of the cable and the position of a break point can be checked conveniently.

Inventors

LUO PENG
WU HONG
LUO ZHENGYUE
ZHANG LIWEN
YI KE
MA CHUAN

Assignees

中国铁塔股份有限公司合川分公司

Dates

Publication Date: 20260512
Application Date: 20221228

Claims (5)

1. The underground cable breakpoint detection device is characterized by comprising a placement pipeline and a camera unit, wherein a cable is placed in the placement pipeline, the camera unit comprises a track, a track car and a camera, the track is arranged on the inner wall of the placement pipeline, the track car is movably connected with the track, the camera is installed on the track car, the camera faces to the side where the cable is located, and a control button is connected to the control end of the track car through a wireless transmission unit; the lifting mechanism is arranged on the rail car and applies acting force to the cable along with the running of the rail car, so that the cable in an active state can be lifted to a certain height; the second pressure sensor is arranged on one side, facing the cable, of the jacking mechanism and is used for measuring the pressure when the cable is jacked; The distance sensor is arranged on the railway car and used for measuring displacement when the cable is lifted; the method for detecting the break point of the underground cable comprises the following steps: s1, a jacking mechanism periodically jacks up a cable along with the running of a rail car; s2, if the displacement detected by the distance sensor when the cable is lifted exceeds a threshold value, executing a step S3, otherwise, executing a step S1; s3, detecting the pressure of the cable during lifting by the second pressure sensor, if the pressure is larger than a first threshold value, not breaking the cable, exiting, if the pressure is smaller than the first threshold value, breaking the cable, and executing the step S4; and S4, if the pressure is larger than a second threshold value, the cable breaking position is farther, the camera is controlled to scan and search the cable breaking point towards a first scanning range which is farther from the railway vehicle, and if the pressure is lower than the second threshold value, the cable breaking position is closer, the camera is controlled to scan and search the cable breaking point towards a second scanning range which is closer to the railway vehicle, and the second threshold value is lower than the first threshold value.
2. The underground cable breakpoint detection device according to claim 1, further comprising a sealing unit, wherein the sealing unit comprises an air bag, a first pressure sensor, a normally closed valve, a first comparator, a second comparator and an air-inflation and air-suction integrated mechanism; The air bag is arranged at the pipe orifice of the arranging pipeline, the air inflation and air suction integrated mechanism is fixedly arranged on the inner wall of the arranging pipeline, the air bag is communicated with the air inflation and air suction integrated mechanism through an air pipe, and the normally closed valve is arranged on the air pipe; the first pressure sensor is fixedly arranged on one side of the air bag, facing the cable, of the first pressure sensor, the output end of the first pressure sensor is connected with the first input end of the first comparator and the first input end of the second comparator respectively, the second input end of the first comparator is connected with the first threshold memory, the second input end of the second comparator is connected with the second threshold memory, the output end of the first comparator is connected with the control end of the normally closed valve and the air charging end of the air charging and exhausting integrated mechanism respectively, and the output end of the second comparator is connected with the control end of the normally closed valve and the air exhausting end of the air charging and exhausting integrated mechanism respectively.
3. The underground cable breakpoint detection apparatus according to claim 2, wherein a side of the air bag facing the cable is arc-shaped.
4. The underground cable breakpoint detection apparatus of claim 1, further comprising a remote terminal, wherein the output of the camera is connected to the input of the remote terminal.
5. The underground cable breakpoint detection device of claim 1, further comprising a temperature sensor, a humidity sensor, and a vibration sensor, wherein the temperature sensor, the humidity sensor, and the vibration sensor are fixedly mounted on the railcar.

Description

Underground cable breakpoint detection device and method Technical Field The invention belongs to the technical field of underground cables, and relates to an underground cable breakpoint detection device and method. Background Underground cables are cables that are often buried under the ground as compared to conventional overhead lines, and are also referred to as underground cables. The cable is made of one or more mutually insulated conductors encased in an insulating layer and a protective layer for the transfer of electricity or information from one place to another. After entering a modern society, underground cable power transmission modes are commonly adopted in large cities due to the fact that urban land is tense, traffic pressure is high, urban capacity is built and the like. At present, when underground cables are laid, in order to save space and facilitate urban planning, the cables are often arranged in preset cable channels. The existing cable channel is mostly composed of cement tunnels, and a cover plate is covered after the cable is laid. Although the cable can be protected, the cable is easy to be soaked by water liquid because the cable channel is positioned underground, particularly in rainy seasons, a large amount of rainwater enters the cable channel to erode the cable, the cable is easy to damage, normal life power supply can be affected, and a large potential safety hazard exists. Meanwhile, the cable is placed underground, the cable can be broken to generate break points due to the fact that the topography is changed or other external forces are pulled, workers cannot check the condition and the break point position of the cable, and the cable cannot be maintained in time to influence the use of electric power. Disclosure of Invention The invention aims to provide a device and a method for detecting a breakpoint of an underground cable, which can be used for checking the condition and the position of the breakpoint of the cable. In order to achieve the aim, the foundation scheme of the invention is that the underground cable breakpoint detection device comprises a placement pipeline and a camera unit, wherein a cable is placed in the placement pipeline, the camera unit comprises a track, a track car and a camera, the track is arranged on the inner wall of the placement pipeline, the track car is movably connected with the track, the camera is arranged on the track car, the camera faces to the side where the cable is located, and a control button is connected to the control end of the track car through a wireless transmission unit. The basic scheme has the working principle and beneficial effects that the cable is arranged in the arranging pipeline, thereby being beneficial to protection. The inner wall of the arrangement pipeline is provided with a track, and the camera is driven by the rail car to move, so that the image information of the cable in the arrangement pipeline can be collected in a sliding manner along the track, and the condition of the cable can be monitored and the condition of a break point can be found in time. The device further comprises a sealing unit, wherein the sealing unit comprises an air bag, a first pressure sensor, a normally closed valve, a first comparator, a second comparator and an air inflation and air suction integrated mechanism; The air bag is arranged at the pipe orifice of the arranging pipeline, the air inflation and air suction integrated mechanism is fixedly arranged on the inner wall of the arranging pipeline, the air bag is communicated with the air inflation and air suction integrated mechanism through an air pipe, and the normally closed valve is arranged on the air pipe; the first pressure sensor is fixedly arranged on one side of the air bag, facing the cable, of the first pressure sensor, the output end of the first pressure sensor is connected with the first input end of the first comparator and the first input end of the second comparator respectively, the second input end of the first comparator is connected with the first threshold memory, the second input end of the second comparator is connected with the second threshold memory, the output end of the first comparator is connected with the control end of the normally closed valve and the air charging end of the air charging and exhausting integrated mechanism respectively, and the output end of the second comparator is connected with the control end of the normally closed valve and the air exhausting end of the air charging and exhausting integrated mechanism respectively. The sealing unit is arranged at the pipe orifice of the arrangement pipeline, and seals the pipe orifice of the arrangement pipeline through the expansion of the air bag, so that foreign matters such as external water flow or dust are prevented from entering the arrangement pipeline to pollute the cable. Further, one side of the air bag facing the cable is arc-shaped. The shape of the air bag is arranged, so