Vacuumizing method for pipeline transport by applying vacuum pump exhaust and vehicle operating exhaust in stages

Abstract

The invention discloses a vacuumizing method for pipeline transport by applying vacuum pump exhaust and vehicle operating exhaust in stages. According to the vacuumizing method, a vacuum pump which is arranged along a pipeline and a vehicle which is arranged in the pipeline are adopted to vacuumize the pipeline. The process of exhausting air in the pipeline is firstly divided into five stages according to the gas pressure in the pipeline, namely, 1-(0.3-0.02) atm, (0.3-0.02)-0.01 atm, 0.01-0.001 atm, 0.001-0.0001 atm and 0.0001-0.00001 atm. In the first stage, the vacuum pump arranged along the pipeline is adopted for exhaust. In the exhaust processes of the second stage, the third stage, the fourth stage and the fifth stage, vehicle operating exhaust is adopted. The vacuumizing method for pipeline transport by applying vacuum pump exhaust and vehicle operating exhaust in stages improves the exhaust efficiency and reduces operating cost.

Description

technical field [0001] The invention belongs to the technical field of vacuum pipeline transportation, and in particular relates to a vacuum pumping method for pipeline transportation by applying a vacuum pump and vehicle running exhaust in stages. Background technique [0002] Vacuum pipeline transportation is a new type of transportation system that is in the research and development stage. Before the system is operated, a vacuum environment must be established for the pipeline to ensure that the vacuum degree in the pipeline is within the specified low pressure range. As the vehicle travels and under the action of various air leakage factors, the vacuum degree in the pipeline will decrease, that is, the air pressure will increase. In order to reduce the air pressure and restore the vacuum degree in the pipeline to the rated level, it is necessary to carry out vacuum maintenance work, that is, to supplement the vacuum pipeline or use other appropriate methods to remove exc...

AI Technical Summary

Problems solved by technology

At this stage, the air pressure in the pipeline is already low, and the working efficiency of the vacuum pump is not high; from 1 / 100 atmospheric pressure to 1 / 1000 atmospheric pressure, the amount of discharged gas is less than 1% of the original gas, and the working efficiency of the vacuum pump is not high; / 1000~0.0001, 0.0001~1 / 100000 vacuum pump work efficiency is lower

[0005] From the above analysis, it can be seen that a relatively high vacuum environment suitable for high-speed driving of vehicles is established for the pipeline of vacuum pipeline transportation, that is, the rated pressure inside the pipeline is small, such as less than 1000Pa, and the vacuum pump alone or the exhaust mode of the vehicle alone will not uneconomical, unreasonable

Even if both exhaust methods are used, the purpose of improving exhaust efficiency and reducing operating costs cannot be achieved if the application conditions are not appropriate, the arrangement is unreasonable, or the sequence is wrong.

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