The detection of pipes is the prerequisite for repairs and reasonable maintenance. The purpose is to first understand the situation inside the pipe, and then judge whether the pipe needs repair based on the actual situation, as well as the construction methods that should be adopted for the repair, to scientifically and effectively create a customized plan.
CCTV pipeline inspection (centralized control industrial pipe endoscopy) technology is used to systematically inspect drainage pipes, prevent pollution caused by leaks, and for geological disaster monitoring and prevention (e.g., landslides). This is a new type of application engineering technology that uses an industrial pipe endoscopy system to continuously and in real-time record the actual situation inside the pipe. Technicians can determine the on-site location and nature of internal pipe issues using the video footage recorded by the endoscopy system and pipe CCTV camera. It has real-time, intuitive, and accurate foresight, providing a reliable technical basis for proactively preventing environmental pollution, taking targeted governance measures, maintaining drainage channels, eliminating stagnant rainwater and sewage, and preventing pipe leakage pollution.
In cases where the water level inside the pipe is relatively high, CCTV cannot effectively capture underwater conditions. The sonar system can be used as a supplement.
Pipeline inspection is divided into two major categories: structural condition detection and functional condition detection.
Structural condition refers to the status of the pipe itself, such as pipe joints, pipe walls, and pipe foundation conditions. It is related to the structural strength and service life of the pipe;
Functional condition refers to the conditions arising during pipe operation, such as accumulated grease in the pipe and sediment buildup inside the pipe. It is related to the water flow capacity of the pipe and can be improved through pipe maintenance and cleaning, having little impact on the pipe's service life.
CCTV pipeline inspection is primarily used for:
Detecting sewage leakage for environmental protection
Acceptance inspection upon completion of new drainage systems
Acceptance inspection upon completion of drainage system renovation or cleaning
Detecting excessive unidentified infiltration water or insufficient carrying capacity received by sewage treatment plants through drainage systems
Investigating causes of pipe blockage and poor drainage
Detecting the condition of pipes that directly discharge sewage and those that require treatment
Inspecting operational conditions of pipes including corrosion, damage, joint misalignment, sediment accumulation, scaling, and collapse
Locating inspection wells or undefined pipe segments that can't be found due to drainage system or infrastructure construction
CCTV pipe inspection equipment consists of three parts: the main controller, the control cable reel, and the "robot" crawler equipped with a camera. The main controller of pipe inspection can be installed on a vehicle, and the operator controls the crawler's speed and direction inside the pipe through the main controller, while also controlling the camera. The internal video images of the pipe are transmitted to the main controller's display screen via cables. Operators can monitor the internal conditions of the pipe in real time and store the original images for further analysis. After completing the CCTV fieldwork, defects in the pipe can be coded based on the video recordings, defect images can be captured, and inspection reports can be compiled. According to user requirements, CCTV video data can be processed to provide videotape or CD archives to guide future pipe repair works.
