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Leakage judging method for vacuum pipeline

A technology of vacuum pipelines and pipelines, which is applied in the direction of liquid tightness measurement using liquid/vacuum degree, fluid tightness testing, machine/structural component testing, etc. It can solve the problems affecting passenger safety, poor sealing performance, route terrain, The complex external environment of the region and other issues can achieve the effect of improving safety factor and reliability

Active Publication Date: 2018-04-13
张跃
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as figure 1 with figure 2 Shown: a method for judging the leakage of a vacuum pipeline, including a vacuum pipeline 1 composed of a sandwich panel 3, the sandwich panel 3 includes an inner panel 32, an outer panel 31, and a sandwich layer 33 between the two ; The pressure of the sandwich layer is between the internal and external pressures, as the pressure sensor detects that the pressure of the sandwich layer 33 becomes larger, indicating that the pressure is strong that layer of air leakage; as the pressure of the sandwich layer 33 becomes smaller, it indicates The layer with low pressure leaks.

[0039] Specifically, the vacuum pipeline 1 is composed of a sandwich panel 3, and the sandwich panel 3 is composed of an inner layer, an outer layer panel, and a sandwich layer 33 arranged between the two, and the thickness of the outer layer of the sandwich panel and the inner layer panel are uniform. The thickness is 300mm, and the sandwich layer 33 includes a plur...

Embodiment 2

[0046] Under the same structural signs, when the vacuum pipeline is placed 100m underwater, the underwater pressure is 980KPa, and a pressure sensor is installed on the vacuum pipeline 1. The inner cavity of the vacuum pipeline 1 and the sandwich layer 33 are respectively sealed, and the inner cavity of the vacuum pipeline 1 is evacuated first, so that the pressure inside the vacuum pipeline 1 reaches P2=0Pa and remains stable.

[0047] The method for judging the leakage of the vacuum pipeline is the same as in Embodiment 1.

Embodiment 3

[0049] Such as figure 1 with figure 2 As shown: when the vacuum pipeline 1 contains the train 2, the vacuum pipeline 1 and the vacuum train 2 can be detected at the same time, that is, when the vacuum pipeline 1 is placed under atmospheric pressure, the pressure detection method of the vacuum pipeline 1 is the same as above, at this time The shell of the train 2 is also made of sandwich panels 3. When the train 2 is placed in the vacuum pipe, the outside of the train is in a vacuum state, the external pressure value P2=0Pa, and the inside of the train is standard atmospheric pressure, that is, P4=101KPa. Detect the pressure value in the sandwich layer of the train. When the pressure value is stable at a certain value, such as 10KPa, preset the threshold range of the calibration pressure value P in the controller, such as 9.90~10.1 KPa.

[0050] The pressure sensor detects the pressure in the sandwich layer of the train in real time. If it is detected that the pressure value...

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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, in particular to a method for judging leakage of vacuum pipelines. Background technique [0002] High-speed vacuum trains have many advantages such as fast speed, low energy consumption, and low resistance. They have very broad development space and will play an important role in long-distance high-speed transportation in the near future. Vacuum trains run in a closed vacuum pipeline. Generally, maglev trains are used, which are not affected by air resistance, friction and weather. Many times lower, this means of transportation may become the fastest way for humans to travel. [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 ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/28
CPCG01M3/283
Inventor 张跃
Owner 张跃
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