in the pipeline dredging company, dredging the pipeline is our normal work. do you know the steps of pipeline dredging? here is a detailed introduction:
it mainly refers to rainwater inlet and rainwater inspection well.
⑴. 雨水口的清捞，目前主要是人工清捞，由于各地区的环境、 季节不同，根据养护要求进水口积泥不得超过管口(因一般进水口有 30cm落底)所以短则一星期，长则一个月就必须清捞一次。
(1) at present, the rainwater inlet is mainly cleared manually. due to the different environment and seasons in different regions, according to the maintenance requirements, the mud accumulation at the inlet shall not exceed the pipe orifice (because the general inlet has a bottom of 30cm), so it must be cleared once a week or a month.
⑵. 雨水检查井的清捞，一般是用人工清捞，但本地区检查井深 度超过4米，而且又是大型管道，在此地区必须加强对雨水口的清捞， 必要时采用吸泥泵或环卫吸泥车，严重时可用潜水员下潜清泥(但下井之前必须向有关部门申请，并获得允许方可下井清捞)。养护要求一般积泥不超过管道30cm。
(2) generally, the rainwater inspection well is cleaned manually, but the depth of the inspection well in this area is more than 4 meters, and it is also a large pipeline. in this area, it is necessary to strengthen the cleaning of the rainwater inlet. if necessary, the suction pump or sanitation suction truck can be used, and if it is serious, the diver can go down to clean the mud (but before going down the well, the diver must apply to the relevant department and obtain permission). generally, the mud deposit should not exceed 30cm.
(3) the sewage inspection well is generally cleaned (except for hard rock).
dredge is generally small and medium-sized rainwater pipes, large pipes and rainwater pipes are generally carried out by flush truck. according to the maintenance requirements, φ the mud accumulation depth of 250 connecting pipes shall not exceed 1 / 3 of the pipe. in order to meet the annual dredging rate of 110% ~ 120%, small connecting pipes should be increased according to the local environmental conditions to meet the maintenance requirements.
the general inspection wells and water intakes are inspected when they are bailed and dredged at ordinary times, and the routine inspection is conducted once or twice a month. generally not less than 200 meters, not repeated (except in special circumstances). large sewers are generally inspected by divers, generally no less than 3 sections.
inspection contents: inspection well and water inlet: check whether the surrounding area sinks, whether the painting falls off, whether the well cover seat is smooth, and whether there are hard stones at the pipe orifice.
large scale pipeline: whether the pipeline interface is misplaced, and whether there are mud deposits at the bottom and wellhead (whether there are hard blocks or stones, etc.).
if it is found that the facilities are damaged, the use of the facilities is affected, the pipelines are wrong, and the safe use of the facilities is endangered, a plan must be made for maintenance.
cleaning is generally carried out manually. while cleaning the rainwater inlet and inspection well, the inner wall of the inlet and inspection well can be cleaned. generally, the brush is used for cleaning, and the flushing gun can be used for cleaning when necessary.
according to the requirements of health and epidemic prevention, the inspection wells and rain inlets should be often sprayed with insecticides to kill insects and sterilize.
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