Dredging system of sewage pipeline with large-pipe diameter

Abstract

The invention relates to a dredging system of a sewage pipeline with large-pipe diameter and a method thereof. The dredging system comprises a small downhole dredger, an overground operation system, an air-charged rubber gate and an overground charging-discharging device. The small downhole dredger comprises a dredger body and an underwater stirring device arranged on the dredger body; the small downhole dredger is connected with a ground operation control system through a rope and a control line; when in operation, the underwater stirring device stirs up sludge at the bottom of a pipeline. Before small downhole dredger works, the air-charged rubber gate is placed in a downstream pipeline of a dredged pipe section and charged with air so as to lead water level in the dredged pipe section to rise up, thus facilitating the operation of the small downhole dredger. On the ground, an operation system is arranged so as to control the operation of the small downhole dredger in the pipeline. After accomplishing the operation in one pipe section, the small downhole dredger is lifted out from the pipeline, simultaneously the air in the air-charged rubber gate is discharged and the rubber gate is taken out from the pipeline. Former sewage accumulated in a working pipeline flows away fast and the sludge stirred up is also washed away together, thus removing the sludge in the pipeline. The dredging system can realize dredging of the sewage pipeline with large-pipe diameter; and the diameter of the dredged pipeline is over 1meter, in addition, the operation done by workers in the pipe is not needed, and the device has strong processing capability, small volume, flexibility, low cost and operation expense, and simple technology.

Description

technical field [0001] The invention belongs to the technical field of municipal water supply and drainage pipe network engineering, and in particular relates to the dredging technology for large-diameter sewage pipes. Background technique [0002] With the expansion of urban scale and the continuous increase of water consumption, the drainage volume of cities is also increasing, and the diameter of drainage pipes is also increasing. At present, the largest diameter of drainage pipes in my country has reached more than 3m, and large-diameter sewage pipes The dredging work is also becoming more and more onerous. [0003] At present, the main dredging methods at home and abroad include winch dredging method, high-pressure water jet dredging method and water scour dredging method. They all have their own shortcomings and deficiencies: the drawworks desilting method is suitable for pipes of various diameters, but this method requires manual delivery of bamboo chips down the well...

AI Technical Summary

Problems solved by technology

They all have their own shortcomings and deficiencies: the drawworks desilting method is suitable for pipes of various diameters, but this method requires manual delivery of bamboo chips down the well, and the very harsh working environment in the well brings great inconvenience to workers and endangers their health. It may even endanger the lives of workers; due to the high cost and scouring effect, the high-pressure water jet dredging method is usually limited to pipelines with a diameter of less than 1.3m, and it is difficult to promote it in large-diameter pipelines; the water scouring dredging method requires The pipeline itself must have a certain flow rate, the silt should not be too much (about 20%), and the upstream water cannot flow away from other branches, and at the same time ensure that the upstream water does not flow back into the nearby buildings, and the scope of application is also greatly limited

[0004] In addition, there are trencher dredging and Sielwolf system dredging. The trencher dredging requires smooth pipe walls and not too much dirt, and it is difficult to operate in large-diameter pipelines; while the Sielwolf dredging system is bulky and Expensive and limited use

[0005] The above methods have their own shortcomings, and they are not suitable for the dredging of large-diameter sewage pipelines.

Images