Automatic detection line of liquefied petroleum gas cylinder valve

Abstract

The invention relates to an automatic detection line of a liquefied petroleum gas cylinder valve, which belongs to the technical field of detection instruments. The invention is characterized in that the automatic detection line consists of eleven work stations: an upper element work station, a high-pressure closed sealing detection work station, an opening work station, a low-pressure opening sealing detection work station, a high-pressure opening sealing detection work station, an internal thread through gauge detection work station, an internal thread stop gauge detection work station, an external thread detection work station, a flow rate detection work station, a tight screwing work station and an opening reduction work station. The invention has the advantages that the detection line compares the leakage detected by a gas sensor with the leakage detected by a differential pressure sensor, the leakage detection by the gas sensor greatly shortens the detection time and improves the defection efficiency, the efficiency improvement of the leakage detection by the gas sensor is very obvious, particularly for 100 percent detected products, and in addition, the precision is high.

Description

technical field [0001] The invention belongs to the technical field of detection instruments. Background technique [0002] At present, according to the provisions of GB7512-2006 "Liquefied Petroleum Gas Cylinder Valve Testing Standard", the manufacturers of LPG cylinder valves in my country mostly use manual methods to detect LPG cylinder valves, and some detection indicators cannot be 100% detected. . [0003] The air tightness test of the LPG cylinder valve is not tested by water. Fill the test piece with air and put it into the water to observe whether there are bubbles. The degree of leakage can be judged by the number of bubbles generated within a certain period of time. This method is simple to operate, does not require high skills of operators, and can determine the specific location of the leak. However, this method is affected by human factors and has large errors. It cannot perform quantitative analysis on the leak, and cannot realize production automation. Produc...

AI Technical Summary

Problems solved by technology

This method is simple to operate, does not require high skills of operators, and can determine the specific location of the leak. However, this method is affected by human factors and has large errors. It cannot perform quantitative analysis on the leak, and cannot realize production automation. Production The efficiency is low, and at the same time, surface treatment such as drying and anti-corrosion is required for the inspected workpiece, which increases the inspection cost

[0004] The internal and external threads of LPG cylinder valves are manually inspected. Due to the low efficiency of manual inspection, the manufacturers of LPG cylinder valve factories use daily random inspections for inspection, and there are factors of human error detection.

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