Pipeline dredging has become an important work that cannot be ignored in drainage department. A large number of sundries are discharged into the drainage pipeline, and the cement sand on the construction site is deposited and silted, which will cause pipeline blockage. If the pipeline is not dredged, it will cause excessive sewage flow, pollute the environment and bring trouble to people's lives. Professional pipeline dredging equipment-Schroeder pipeline robot introduces in detail the main methods of pipeline dredging:

1. pipeline crawling robot

The pipeline CCTV TV detection system consists of three parts: main controller, control cable rack and "robot" crawler with camera lens. The main controller can be installed in the vehicle, and the operator controls the speed and direction of the crawler in the pipeline through the main controller, and controls the camera to transmit the video image in the pipeline to the display screen of the main controller through the cable, so that the operator can monitor the internal situation of the pipeline in real time and record and store the original image for further analysis. After the CCTV field work is completed, the pipeline defects are coded and snapped according to the detected video data, and the inspection report is compiled. According to the user's requirements, the closed-circuit television image data is processed, and video tapes or CDs are provided for archiving, so as to guide the pipeline repair work in the future.

2. Winch dredging

First, use bamboo pieces to pass through the pipeline to be cleaned, and then use winches on inspection wells at both ends of the pipeline to twist the wire rope back and forth, so that the sludge is pushed into the downstream inspection wells by cleaning tools. Winches are manual, electric and electric. , and there are many kinds of cleaning tools, according to the size of the pipe diameter and user needs to choose. This method is suitable for pipelines with various diameters, especially for pipelines with serious siltation and dense silt bonding.

Disadvantages of winch dredging: it needs to be done manually to transport bamboo chips from one wellhead to another, and the harsh underground working environment brings great inconvenience to the work and easily leads to safety accidents.

3. trench soldiers

The desliming device used for rigid sealing between the same pipes, under the action of air or liquid pressure, passes through the pipes as a jet, and at the same time removes foreign bodies in the pipes. This method requires smooth and regular pipe wall and does not need too much sludge, so it is mostly used for dredging nuclear energy and industrial metal sewage pipes. Similar pneumatic ditcher uses compressed air to transport the dredger from one manhole to another, and then the winch pulls the wire rope at its tail to open the wing, and the mud is scraped out of the pipeline with the dredger. Another kind of flexible shaft ditcher uses motor or automobile engine to generate electricity, which is transmitted to the dredging tool through the flexible shaft. The rotation of the flexible shaft makes the dredging tool rotate forward, and the silt is loosened and scraped into another inspection well.

4. High pressure water jet

A widely used dredging method uses a high-pressure water sprayer equipped with a large water tank, an electric pipe winder, a high-pressure water pump and a water nozzle. When working, the automobile engine drives the high-pressure pump to pressurize the water and send it to the water nozzle. The reaction force generated by its reverse injection makes the water nozzle and rubber hose move forward in the opposite direction, and at the same time cleans the pipe wall. When the nozzle reaches the downstream inspection well, the motor winch will take back the hose, and the water nozzle will continue to spray water to rush the residual sediment to the downstream inspection well and be sucked away by the mud suction truck. This method can be applied to pipelines with various shapes and specifications. Due to the cost and scouring effect, it is usually limited to pipelines with a diameter less than 130cm, and the cost of cleaning water is relatively high. In addition, the influence of mixed sediment particles in high-pressure water jet on the pipe wall can not be ignored.

5. Scouring and dredging

Due to the limitation of manhole size, the components of the whole device must be assembled in the sewer. When working, sewage accumulates in the upstream of the device, and when it reaches a certain height, it forms a water flow in front of the device to remove deposits. Once enough sediment is washed away, the device moves a few centimeters downstream, and the advantages of this method are obvious.

Schroeder pipeline closed-circuit television detection robot, pipeline periscope, industrial endoscope www.sld-cctv.com.