What is the role of pipeline inspection robots in municipal pipeline dredging?

(Reference: Sohu.com)

1. Overview

Pipeline desilting is to dredge the pipeline, clean up the silt in the pipeline, and keep it smooth for a long time, so as to Prevent urban waterlogging. Pipeline dredging has become an important task that cannot be ignored by the drainage department. If a large amount of debris and cement sand from infrastructure construction sites are discharged into the drainage pipeline, sedimentation and siltation will cause pipeline blockage. Failure to desilt and unblock pipelines will cause overflow of sewage, pollute the environment, and bring trouble to people's lives.

Dirt in the pipes should be removed before construction of trenchless repair and renewal projects. Pipeline cleaning technologies mainly include winch desilting method, water brush desilting method, high-pressure water jet cleaning, etc. Among them, the high-pressure water jet cleaning method is the leading equipment for industrial and civil pipeline cleaning in the world. The applicable proportion accounts for about 80-90%. This technology also has many applications in China.

2. Introduction to various pipeline cleaning technologies

Winch dredging:

First use bamboo pieces to pass through the pipes that need to be cleared, and then use the pipes at both ends of the pipes to The winch on the inspection well reciprocates the wire rope, so that the sediment is pushed into the downstream inspection well by the clearing tools. The winches include manual, motorized, electric, etc. There are also many kinds of clearing tools, which are selected according to the pipe diameter and user needs. This method is suitable for pipelines of various diameters, and is more suitable for pipelines with serious pipeline siltation and dense silt bonding.

Disadvantages of winch dredging: Sending bamboo pieces from one wellhead to another requires manual work. The harsh working environment underground brings great inconvenience to the work and can easily cause safety accidents.

Water scouring and desilting:

This method is to make a device that can block water and put it into the desilting pipe through the inspection well. Due to the limitation of the wellhead size, it is generally used to The components of the installation are placed in the pipeline in pieces and then assembled. After the desilting device is assembled, place it at a certain position in the pipeline. Use the device to block the sewage in the pipeline upstream of the device. When the water level reaches a certain height, the water will be released, and the water flow formed by the upstream water storage will be used to flush away the inside of the pipe. of sediment.

Disadvantages of water flushing and desilting: a relatively large amount of work must be completed in the sewer pipe. A similar method is to use locally installed facilities, such as sewer water gates, for flushing and dredging.

High-pressure water jet desilting:

High-pressure water jet cleaning uses a high-pressure water jet truck equipped with a large water tank, motorized pipe reel, high-pressure water pump, water jet nozzle, etc. During operation, a car engine drives a high-pressure pump, which pressurizes the water and sends it into the water jet nozzle. The reaction force generated by the backward injection makes the water jet nozzle and the hose move in the opposite direction together, and also cleans the pipe wall at the same time; when the nozzle reaches the downstream inspection When drilling the well, the motorized winch retracts the hose, and the water jet continues to spray water to flush the remaining sediment to the downstream inspection well, where it will be sucked away by the suction truck.

Advantages of high-pressure jet water dredging:

1. Choose the appropriate pressure, and the high-pressure water jet will not damage the body of the equipment being cleaned;

2. Use Ordinary water flushing and cleaning will not pollute the environment, will not corrode equipment, will not cause any mechanical damage, and can also remove special dirt that is difficult to dissolve in chemical cleaning;

3. Cleaned equipment and parts do not need to be reused. Carry out cleaning treatment;

4. Can clean parts with complex shapes and structures, and can clean in places with narrow spaces, complex environments, harsh and harmful environments;

5. Easy to implement Mechanization, automation, and easy digital control;

6. Save energy, have high cleaning efficiency and low cost.

3. Requirements for pipeline cleaning by trenchless pipeline repair technology

4. High-pressure jet water dredging process and operating points

Construction process flow chart

Schroeder CCTV inspection robot is composed of controller, crawler, high-definition camera, wire car, etc. During operation, the controller controls the crawler to carry the detection equipment into the pipeline for inspection. During the inspection process, the robot can transmit video pictures of the internal conditions of the pipeline in real time for professional construction personnel to analyze the internal conditions of the pipeline.

Let us work together to create the future of China’s smart pipe network inspection industry

Shenzhen Schroeder, a leading brand manufacturer in the domestic underground inspection industry