In the daily pipeline inspection work, Iꦉ found that although the advanced construction quality and pipeline design level have been greatly improved compared with the past, most of the underground pipeline construction problems are still s꧅erious after the completion of construction, and there are significant safety hazards and hidden troubles.

Collapse caused by s🍌evere rupture of photo pipe at the rupture of the picture pi♛pe.

If these problems are detected by traditional methods, it is difficult to determine them efficiently. Some of them will directly interrupt the normal operation of the drainage network, and some will affect the pipeline structure or drainage function of the pipe network to form potential hazards. They may cause huge waste of drainage facilities construction or maintenance investment, and reduce the function and efficiency of sewage treatment plants. The mixed sewage pipeline will pollute the river and groundwater resources, causing the harsh investment environment and living environment of the city.

CCTV detection technology is a newly introduced technology in recent years. Although this detection technology is advanced, the two instruments used by the author (made in Korea and Germany respectively), although the tꦛwo instruments are different in appearance and performance parameters, have enco🌠untered some common problems in the detection work.

(1) the crawler's tire grip is generally insufficient. When entering the pipeline with more mud or asphalt, the crawler's action is very difficult, which seriously affects the progress of detection. The author thinks that we should strengthen the grip of the tyre or improve the braking mode of the crawler.

(2) when entering the field, and other harsh testing environments on both sides of the river, vehicles will not be able to enter the testing sites. The transportation of the instruments will become a major problem. Due to the environmental factors caused by pipeline inspection, the relevant transport facilities should not bꦆe complete.

(3) the crawler tail line is generally worn seriously. Although the German instrument belt pulley block reduces the friction between the line and the shaft wall to a certain extent, the wear caused by the drag🍸 caused by the gravity of the cable itself can not be ignored. It is very likely to cause obstacles and interrupt the detection process.

4 Conclusion

The detection work of drainage pipeline is still in the initial stage in our country. However, with the continuous enhancement of people's awareness of environmental protection, the state has invested more and more efforts in sewage treatment projects, and the management and maintenance of drainage network has also received due attention. The Ministry of construction and many cities and places have also promulgated corresponding policies and regulations. This shows that the governments at all levels in China have fully realized the importance of drainage pipe network management and maintenance, and the detection and maintenance of drainage pipelines have huge market prospects and unlimited commercial machines.

The application of CCTV pipeline endoscopy technology has made a qualitative leap in the management and maintenance methods of urban drainage network. Compared with the traditional pipeline inspection technology, the technology has high safety, clear and intuitive images, and can be repeatedly broadcast for the research of the industry. It provides a powerful help for the scientific decision of pipeline repair plan. The technology can also be applied to the internal condition detection of water supply, gas pipeline and power and telecommunication bushing, as well as different rescue, disaster relief, archaeology and so on. Field.

With the further development of our society and economy, the society will be more and more demanding for safe drainage. It is of great significance to use drainage pipe inspection technology to understand the internal condition of pip♛elines in time, make timely and more practical pipeline mai💙ntenance decisions, and improve social and economic benefits.