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
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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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