Detection method for osmotic concentration of vehicle fuel tank welding point and connector
A detection method and technology of penetration concentration, which is applied in the field of detection of penetration concentration of welding points and joints of automobile fuel tanks, and can solve the problems of inability to measure the local concentration of welding points and joints, large penetration of welding points or joints, etc.
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[0009] like figure 1 As shown, the detection method of the automobile fuel tank welding point and joint penetration concentration of the present invention comprises the following steps: first the automobile fuel tank 2 is placed on the support 1 in the test box 6, and the test box 6 is integrally heated to make the test box When the air temperature in 6 reaches 36°C, turn on the internal circulation fan 5 in the test box 6 to keep the temperature field in the test box 6 uniform, adjust the heating intensity, and keep the air temperature in the test box 6 at 36°C for 1 hour; Then open the outer circulation air inlet 7 and the outer circulation air outlet 8 on the test box wall, and make the hydrogen and helium concentration of the fuel vapor in the test box stabilize at 3ppmC through the outer circulation ventilation system; then start the flame power detector 9, test box 6 The air in the flame enters the flame power detector 9 from the sampling port 11, and then returns to the...
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