Application of High Pressure Washer in Desilting of Urban Sewers


The pace of construction of modern cities in China is g […]

The pace of construction of modern cities in China is getting faster and faster, the scale of cities is constantly expanding, and the scale of infrastructure needs to be continuously expanded. The city ’s water consumption is increasing, the drainage volume is also increasing, and the management of sewer pipes , Maintenance, repair and dredging are also increasing. Among them, the dredging of sewer pipes is very important, and it has become a work that cannot be ignored by relevant departments. Sewers and other debris in the sewers often cause problems such as sedimentation and siltation of the construction site's cement mortar. Excessive sedimentation will cause pipeline blockage. If it cannot be cleaned and dredged in time, it will cause sewage overflow, pollute the environment, cause economic losses, and cause problems for residents.
According to the above situation, the relevant departments have adopted many methods to solve the dredging in the sewer, but they are not ideal, as follows:

1. Mechanical dredging method
The mechanical dredging method is a more commonly used method in China. The specific method is: firstly pass the TT piece through the pipe section that needs to be cleared, one end of the TT piece is tied with a wire rope, and the end of the rope is tied with one end of the clearing tool. A winch is set on each of the two inspection wells of the pipe section. After the TT piece passes through the pipe section, the wire rope is tied to a winch, and the other end of the clearing tool is tied to the other winch by a wire rope, and then the winch is used to reciprocate Twist the wire rope and drive the clearing tool to hang the sludge into the downstream inspection well, so that the pipeline can be cleared. The power of the winch can be manual or motorized, and the specific needs are determined according to the actual situation.
The mechanical dredging method is suitable for sewage pipes of various diameters. It is mainly used when the pipe is more severely blocked, the silt is densely bonded, and the hydraulic dredging effect is not good. However, this method also has disadvantages. For example, Workers are labor-intensive and need to manually go down to complete the delivery of TT films from one wellhead to another. Due to the harsh working environment in the underground, it is easy to cause safety accidents.
2. Hydraulic desilting method
The hydraulic desilting method is to make a dredging device that can block water. It is placed in the pipeline by the inspection well. Due to the small size of the wellhead, the entire device cannot be put down. Generally, the components of the device are first transported and then assembled in the pipeline. method. After the dredging device is assembled, put it in a certain position of the pipeline, and block the sewage in the pipeline upstream of the device. When the water level reaches a certain height, release the water, so that the upstream water forms a stream to remove the sediment in the pipeline. When the sediment is washed away, the dredging device moves to the downstream position, and then collects water for dredging. Although this method can remove silt, a considerable amount of work needs to be done in the pipeline. And the water content of sludge is very high, the sewage in the pipeline itself must have a certain flow rate, the sludge should not be too much, the upstream sewage cannot flow away from other branch pipes, and it must also ensure that the upstream water is not returned to nearby buildings. Otherwise, although an air plug is used in the pipeline somewhere, because the pipeline system is in communication, one place is blocked, and the upstream sewage can also flow to other pipe sections. This prevents water from accumulating in the pipe and the gas plug Cannot move downstream. The consequence is that it can only be carried out by using a hydraulic washing truck or transporting water from other places, which is labor- and water-consuming.