Device enabling suction type nitrogen and hydrogen leakage detection instrument to be free of influences by environmental background

A leak detector, inhalation technology, applied in the direction of detecting the appearance of fluid at the leak point, using liquid/vacuum for liquid tightness measurement, etc. Problems with high bottom requirements, to achieve the effect of reducing restriction requirements and improving stability

Inactive Publication Date: 2013-12-25
BOYI TIANJIN PNEUMATIC TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Affected by changes in the environmental background;
[0005] 2. When the ambient background tracer gas concentration is high or there is interference gas, the leakage cannot be detected or cannot be used;
[0006] 3. High background requirements for the use environment

Method used

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  • Device enabling suction type nitrogen and hydrogen leakage detection instrument to be free of influences by environmental background

Examples

Experimental program
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Embodiment Construction

[0016] Such as figure 1 As shown, this embodiment is a device for making the inhalation nitrogen-hydrogen leak detector not affected by the environmental background, including a filter 2, an on-off valve 3, a gas storage tank 5, a pressure reducing valve 6, a flow limiting valve 7, The cover box 9 and the diffusion nitrogen-hydrogen leak detector 11 are connected in series gas path; the object 8 to be tested is partly or completely located in the cover box 9 , and a pressure controller 4 is connected between the on-off valve 3 and the gas storage tank 5 .

[0017] The working engineering of the device described in this embodiment is: the compressed air 1 passes through the filter 2, the switch valve 3, the gas storage tank 5, the pressure reducing valve 6 and the flow limiting valve 7 in turn, and enters the cover box 9; the pressure controller 4 monitors the storage The pressure in the gas tank 5 is controlled to open and close the on-off valve 3. When it is lower than the sp...

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PUM

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Abstract

The invention provides a device enabling a suction type nitrogen and hydrogen leakage detection instrument to be free of influences by the environmental background. The device comprises a switch valve, a gas storage tank, a flow limiting valve, a cover box and the suction type nitrogen and hydrogen leakage detection instrument, and the switch valve, the gas storage tank, the flow limiting valve, the cover box and the suction type nitrogen and hydrogen leakage detection instrument are sequentially connected in series through a gas circuit. A part of or all parts of a detected object are located in the cover box, and a pressure controller is connected between the switch valve and the gas storage tank. The device is used for assisting the suction type nitrogen and hydrogen leakage detection instrument to conduct leakage detection, the influences by the environmental background on detection are avoided, stability, validity and accuracy of the suction type nitrogen and hydrogen leakage detection instrument are improved, shortcomings of the suction type nitrogen and hydrogen leakage detection instrument are overcome, and limitation requirements of the suction type nitrogen and hydrogen leakage detection instrument for the environmental background in a user site are reduced.

Description

technical field [0001] The invention relates to a gas supply device, in particular to a device for preventing an inhalation nitrogen-hydrogen leak detector from being affected by environmental background, and belongs to the technical field of leak detection. Background technique [0002] At present, when the inhalation-type nitrogen-hydrogen leak detector is used for leak detection, a certain pressure of tracer gas is filled in the measured object, and whether there is leakage is judged by absorbing the tracer gas leaked from the surface of the measured object, but in While inhaling the leaked tracer gas, the ambient background air is also sucked into the nitrogen-hydrogen leak detector. The background composition of the general environment in industrial sites is relatively complex and unstable, so the test results are also affected by environmental factors in addition to the leaked tracer gas. The influence of background changes leads to errors in the suction nitrogen-hydro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/20
Inventor 艾子蔚刘德亮
Owner BOYI TIANJIN PNEUMATIC TECH INST
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