Ice pigging is an emerging technique for pipe cleaning in drinking water distribution systems.However,substantial confusion and controversy exist on the potential impacts of ice pigging on bulk water quality.This stud...Ice pigging is an emerging technique for pipe cleaning in drinking water distribution systems.However,substantial confusion and controversy exist on the potential impacts of ice pigging on bulk water quality.This study monitored the microstructural features and composition of sediments and microbial community structures in bulk water in eight multimaterial Chinese networks.Chloride concentration analysis demonstrated that separate cleaning of pipes with different materials in complex networks could mitigate the risk of losing ice pigs and degrading water quality.The microstructural and trace element characterization results showed that ice pigs would scarcely disturb the inner surfaces of long-used pipes.The bacterial richness and diversity of bulk water decreased significantly after ice pigging.Furthermore,correlations were established between pipe service age,temperature,and chloride and total iron concentrations,and the 15 most abundant taxa in bulk water,which could be used to guide practical ice pigging operations.展开更多
In order to solve the problem of the pipeline inspection and cleaning, combining the 3D modeling software Pro/Eningeer （Pro/E） and the dynamics analysis software RecurDyn, the main model, the track system model of t...In order to solve the problem of the pipeline inspection and cleaning, combining the 3D modeling software Pro/Eningeer （Pro/E） and the dynamics analysis software RecurDyn, the main model, the track system model of the tracked pipe duct cleaning robot and the road model are built, and the entity assembly in RecurDyn is applied and the simulation model is obtained. The paper RecurDyn. The speed, the torque of driving wheel and the carries out the dynamic simulation with the software vibration-acceleration of gravity of the whole robot in the vertical direction are obtained and analyzed. Finally, the simulation and the calculation results are compared, the two results are basically the same, it has guiding significance for the further study and the potential applications of the tracked pipe duct cleaning robot展开更多
基金financially supported by the National Natural Science Foundation of China(52100015)the Zhejiang Provincial Natural Science Foundation of China(LQ22E080018)the China Postdoctoral Science Foundation(2021M692860).
文摘Ice pigging is an emerging technique for pipe cleaning in drinking water distribution systems.However,substantial confusion and controversy exist on the potential impacts of ice pigging on bulk water quality.This study monitored the microstructural features and composition of sediments and microbial community structures in bulk water in eight multimaterial Chinese networks.Chloride concentration analysis demonstrated that separate cleaning of pipes with different materials in complex networks could mitigate the risk of losing ice pigs and degrading water quality.The microstructural and trace element characterization results showed that ice pigs would scarcely disturb the inner surfaces of long-used pipes.The bacterial richness and diversity of bulk water decreased significantly after ice pigging.Furthermore,correlations were established between pipe service age,temperature,and chloride and total iron concentrations,and the 15 most abundant taxa in bulk water,which could be used to guide practical ice pigging operations.
文摘In order to solve the problem of the pipeline inspection and cleaning, combining the 3D modeling software Pro/Eningeer （Pro/E） and the dynamics analysis software RecurDyn, the main model, the track system model of the tracked pipe duct cleaning robot and the road model are built, and the entity assembly in RecurDyn is applied and the simulation model is obtained. The paper RecurDyn. The speed, the torque of driving wheel and the carries out the dynamic simulation with the software vibration-acceleration of gravity of the whole robot in the vertical direction are obtained and analyzed. Finally, the simulation and the calculation results are compared, the two results are basically the same, it has guiding significance for the further study and the potential applications of the tracked pipe duct cleaning robot
