The Research On Hydraulic Characteristics Of Migration Of Piped Carriage Under Different Placed Length

In the 21st centry, with the further expansion of the scale of economy, industrialization progresses, the progress of urbanization accelerating, the upgrading of consumption structure, the growing resources contradiction between supply and demand, people have put forward higher requirements for the speed and quality of transportation.The hydraulic transportation of tube-contained raw material ("TRM"for short) by hydraulic pipe is a clean and high efficient method, which can transport both solid material and liquid material and which has the merits of transporting pure material, taking less room ,no pollution ,no dehydrating procedure with less energy and less water. This method of hydraulic transportation is different with traditional slurry pipeline transportation and common material-log pipeline transportation. The TRM by hydraulic pipe is a rising technology which will be applied widely to industry in the future,the research has great theoretical and practical significance.The thesis, which was based on national science fund project"The Research on Hydraulic Characteristics Transported by Tube Charging Pipes"(50579044), adopted the research method of combining theoretical analyses and model experiments and conducted experimental research on hydraulic characteristics of migration of piped carriage under different placed length . The research findings were as follows:1. Analysis of the relations of the guide vanes with different placed length and the vehicle speed. Under the same load and current capacity,the guide vanes placed length is an important factor that affects the pipeline vehicle average velocity. In general,under the the same load and current capacity,the speed of pipe vehicle is increasing with the guide vanes placed length increased.2. Analysis of the pressure distribution along the pipeline with different placed length under the same load and current capacity. As a whole, the distribution curves of the piezometric tubes decreased along the path and the change range was different. The water leads of the pizometric tubes decreased as its distance to the intake increased.3. Analysis of the partial pressure distribution with different placed length under the same load and current capacity.when there was only clean water in the pipeline, the pressure at local pipeline declined evenly along the way;when the vehicle began to move, there was a slight increase of the pressure in the vicinity of that section, compared with when there was only clean water in the pipeline; When the vehicle arrived at that cross-section,pressure in the vicinity increased as well, but at the section office, the pressure decreased, the affected areas is consistent with the length of the vehicle. When the vehicle was about to pass out the pipe, the pressure near that cross-section increased further again.4. Analysis of the relations of the guide vanes with different placed length and the vehicle's energy consumption under the same load and current capacity. The vehicle's energy consumption exist the same trend under the guide vanes with different placed length, with the placed length increases, the energy consumption appeared in decreasing variation.5. Analysis of the relations of the guide vanes with different placed length and the vehicle's transport efficiency. The vehicle's transport efficiency exist the same trend under the guide vanes with different placed length, with the placed length increases, the transport efficiency increased.6. In certain assumptions, simple mathematical model has been established when the vehicle was running smoothly in straight pipeline, obtaining the expression of average speed of the pipe vehicle and compared with the experimental data.This thesis was of great value to the further research of hydraulic permeability pipe transport and of practical significance to the improving of pipe transportation technique. The study also will offer reference for industrial applications in the future.