Pipeline failure and maintenance-8

Answer: when the diameter of drainage pipe is less than 300 mm and the distance between inspection wells is not more than 40 m, it can generally be cleaned by hand with bamboo pieces. The bamboo pieces must be green bamboo with a flat bamboo core, with a section size of not less than 40 mm × 10 mm and a length of not less than 3 m. During cleaning, the bamboo pieces are pushed in from the upstream inspection well, pulled out from the downstream inspection well, repeatedly pushed and pulled several times to loosen the sediment in the pipe and make it wash away with the water flow, or enter the inspection well and remove it with naughty gas.

How to clean drainage pipe machinery?

Answer: when the diameter of drainage pipe is more than 300 mm, or the sludge in the pipe is dense, hard and silted seriously, mechanical cleaning is often used. The method is to use the bamboo piece to pass through the pipe section to be cleaned, the end of the bamboo piece is tied with a steel wire rope, and then the steel wire rope is dragged with a trenching tool. When cleaning the inspection wells at both ends of the pipe section, a winch or electric winch shall be set up on each side to drive the trenching tools to clean up the mud repeatedly.

During the construction, the common general construction tools include skeleton scarifiers for loosening and settling mud, spring knives and pin tools for clearing the roots of trees and rags, etc.; the common mud scraping tools include iron calculation, sand pulling cylinder, steel wire brush and rubber brush, etc.

How to clean the drain pipe dredger?

Answer: the pipe dredger is an ideal equipment for cleaning small diameter (pipe diameter is 20 ~ 200mm) drainage pipes, which is suitable for dredging pipe blockage caused by various reasons. The flexible flexible shaft is used in the equipment, which uses the combined action of rapid rotation of cutter and manual propulsion to clean up all kinds of dirt and sundries in the pipeline. When using, firstly, the flexible shaft shall be pierced through the host hole, and appropriate tools shall be selected to connect the flexible shaft according to different pipe blockages, and then the flexible shaft equipped with tools shall be inserted into the pipe to be cleaned. When the pushing flexible shaft is subject to resistance, the power supply shall be turned on and the clutch handle shall be pushed to make the flexible shaft and tools rotate rapidly, smash the blockages, and continue to push the flexible shaft deep into the pipe. Repeat the operation until the pipeline is completely dredged, and the sediment in the pipeline will wash away with the water flow, or enter the adjacent inspection well and be removed by naughty gas.

How to clean the drainage pipeline hydraulically?

Answer: when the diameter of the pipe is less than 700mm, the water outlet can be blocked with air plug in the inspection well first, and then the water can be filled; when the depth of water accumulation reaches about 1m, the air in the air plug will be released suddenly, the air plug will be reduced, and the dirt in the pipe will be washed away by the jet water head. One end of the air plug is tied to the winch with a thin steel wire rope. Driven by the water flow, the air plug floats downstream to clean the pipe section.

Besides air plug, pontoon can also be used for hydraulic cleaning. There are two kinds of pontoons: Iron and wood: the iron pontoon is 50-100mm smaller than the pipe diameter; the wood pontoon is hollow, the outer edge is rubber plate, and the diameter of rubber ring is equal to or 10-20mm larger than the pipe diameter. During the operation, the air plug or valve shall be used to block the water outlet first, and the water shall be suddenly released when the water is stored to about 1m deep, and the water head shall be used to push the pontoon forward; the iron pontoon floats on the water in the pipeline, and the water under the pontoon passes through the water, with the same effect as the air plug method; when the wooden pontoon is used, the water shall be ejected from the periphery of the pontoon, and the silt shall be washed away. This method of using sewage self flushing to clean the drainage pipeline is suitable for the place where there is not much silt in the pipeline, generally around 20%.