What is Pipeline CCTV inspection?

CCTV (Closed-Circuit Television) pipe inspection in the construction inspection industry is an advanced technology that utilizes a robotic crawler equipped with a high-definition camera to enter hidden pipelines such as underground drainage and sewage networks. It collects and analyzes images in real time, providing a non-destructive and efficient way to detect defects such as corrosion, scaling, cracks, and perforations within the pipes. This provides a scientific basis for pipe maintenance, repair, completion acceptance, and network health assessment.

Core Components

1. Crawler (Robot): Equipped with a camera and lights, it can be controlled to move forward, backward, and turn, acting as the "eyes" and "hands."

2. Cable and Cable Reel: Transmits video signals and control commands.

3. Main Controller: Located above ground, the operator controls the equipment, views and records video in real time, and performs data analysis.

Main Applications and Functions

• Full Lifecycle Management: Used for completion acceptance of newly constructed pipelines, general survey and assessment of aging pipe networks, pre-repair plan design, construction monitoring during repair, and post-repair re-inspection.

• Health Diagnosis: Evaluates pipe corrosion resistance quality and functional status, and identifies water ingress and leakage points.

• Non-Excavation Technology: Avoids traditional excavation, reducing traffic disruption and environmental impact.

Inspection Content

• Defect Identification: Rust layers, scaling, corrosion, perforations, cracks, deformation, foreign object blockage, etc.

• Defect Coding and Reporting: Classifies and codes defects from video footage, generating a comprehensive inspection report with images and text.

Workflow

• Preliminary Preparation: Collects pipe network data, conducts on-site surveys, and cleans the pipes (flushing, ventilation, and toxic gas detection).

• Field Inspection: The crawler enters the pipeline, and the operator monitors, records video, and logs data in real time.

• Indoor Analysis: Engineers interpret the video, perform defect analysis and assessment, and write the report.

Significance

CCTV inspection "visualizes" underground hidden engineering projects, making it the most economical, scientific, and effective method for modern urban pipe network management (especially for the renovation of aging pipe networks), promoting the intelligent and refined management of urban drainage networks.