A method for judging the leakage of a vacuum pipeline

Abstract

The invention relates to a leakage judging method for a vacuum pipeline. The leakage judging method comprises a pipeline formed by a sandwich board, wherein the sandwich board comprises an inner layer, an outer layer and a sandwich layer arranged between the inner layer and the outer layer; the pressure strength of the sandwich layer is between the internal and external pressure strengths; if thedetected pressure strength of the sandwich layer is increased, the layer with relatively high pressure strength is leaked; and if the detected pressure strength of the sandwich layer is reduced, the layer with relatively low pressure strength is leaked. The invention further discloses another leakage judging method for the vacuum pipeline. According to the leakage judging method, the air leakage position can be accurately and rapidly judged, so that the security coefficient is greatly increased.

Description

Technical field [0001] The invention belongs to the technical field of vacuum pipelines, and in particular relates to a method for determining leakage of vacuum pipelines. Background technique [0002] High-speed vacuum trains have many advantages, such as high speed, low energy consumption, and low resistance. They have a very broad development space and can play an important role in long-distance high-speed transportation in the near future. Vacuum trains run in closed vacuum pipes. Maglev trains are generally used. They are not affected by air resistance, friction and weather. The theoretical speed can reach 1000-6000 km / h, which is several times higher than that of airplanes and consumes more energy than airplanes. Many times lower, this kind of transportation may become the fastest way for humans to travel. [0003] The vehicle of the vacuum train runs at high speed in a vacuum environment. First of all, it is necessary to ensure that the vehicle is in a closed and safe vacuu...

AI Technical Summary

Problems solved by technology

[0003] The vehicles of the vacuum train run at high speed in a vacuum environment. First of all, it is necessary to ensure that the vehicles are in a closed and safe vacuum environment. However, due to the long-distance transportation vacuum pipeline, the route terrain, and the external environment of the area are complex, resulting in uncertain factors for possible leakage of the pipeline. Therefore, how to detect pipeline leakage in real time is the first condition for the safe operation of vacuum trains

[0004] The existing vacuum pipelines mainly have the following defects: (1) The vacuum train runs in a vacuum environment in the vacuum pipeline. At present, the existing pipeline structure has poor sealing performance and cannot ensure a stable and safe vacuum environment inside; (2) the vacuum The shells of the pipelines are all solid structures, on the one hand, the weight is heavy; on the other hand, once leaks, the risk factor will be greatly increased, affecting the safety of passengers, and the sealing performance is poor; (3) the existing vacuum pipelines can perform real-time leak detection but timely Poor performance, when an emergency situation occurs, there is no timely and effective treatment method to remedy or alleviate

Images