🔯1) pipe plugging, dredging, washing and partial treatment.

🧜1. Before the pipeline is repaired, plugging should be carried out for the water pipeline, and then the high-pressure cleaning car and suction tank can be used to dredge, flush and pump the repair pipeline.

ꩲ2. It is found that the defects in the inner wall of the pipeline such as bulging and foreign matter interpenetration should be dealt with locally by the pipe cutting and grinding robot, so as to avoid scratching the lining hose.

3. It is found that local leakage of pipeline affects the curing and repair of UV liner. Local spot repair should be carried out first.   

2) pipeline inspection

" style="box-sizing: border-box;background: transparent">Pipeline repair system It is necessary to detect the inner wall of the pipeline before it can accurately locate and judge the pipeline defects.   

3) UV UV lining curing operation

First, pull into the bottom membrane.

Padding film should be laid in the original pipe before pulling into the hose. The mat should be placed at the bottom of the original pipe and cover the circumference of the pipe larger than 1/3, and it should be fixed at both ends of the original pipeline.   

Trenchless repair -UV UV lining curing operation

2. Pull in the lining.

😼According to the following specifications, pull the lining pipe into the inside of the repaired pipe.

✤The impregnated resin hose should be smoothly and slowly pulled into the original pipe along the backing film on the bottom of the pipe, and the pulling speed should not exceed 5m/min.

👍No hose should be worn or scratched while pulling in the hose.

✱Both ends of the hose should be longer than the original pipe 300-600mm

After the hose is pulled into the original pipe, it should be placed on the bottom membrane.   

Inflatable expansion hose

𝔍According to the requirements of the inner lining hose material and diameter, the pressure and speed of the compressed air are compressed into the compressed air.

𝔉Before the inflation, carefully check whether the binding is proper.

🔯The inflatable device should be installed at the inlet end of the hose and should be equipped with a device for controlling and displaying compressed air pressure.

𒁃Tightness of hoses should be checked before inflating, and adjusting valves should be installed at the end of hoses.

🐭Compressed air pressure should enable the hose to expand and expand and close to the inner wall of the original pipe.

𝕴They should be strictly executed according to the charging process of the inner product instructions, and must not rush into a large number of compressed air expansion hoses at one time or too quickly, so as to avoid lining wrinkles and affect the quality of solidified pipes.

(4) UV curing

UV curing should meet the following requirements:

ꦚDuring the UV curing process, the air pressure inside the liner is maintained, so that the inner liner is in close contact with the original pipeline.

♒UV speed should be controlled according to the diameter and thickness of inner liner.

﷽When the liner is cured, the pressure in the pipe should be reduced to atmospheric pressure.

After completion of the curing, remove the head, the lining of the inner lining and the end of the inner liner should be sealed and cut.     

Branch opening

After repairing the main pipe with branch pipes, the pipe cutting and grinding and repairing robot should be adopted to repair the robot according to the requirements of the pipeline Authority. The main methods for finding the location of grinding holes are:

💝Before laying the lining hose, let the robot for cutting and repairing enter the pipeline and run to the position of the branch pipe.

𒁃High quality lining material, when the pipe diameter is suitable, will be depressed at the branch pipe position after curing, and identify the location of the hole through the naked eye.

The push rod type small cutting and repairing robot enters the branch pipe and opens through holes from the branch pipe to the main lining.