System for detecting gas tightness of compressed natural gas dispenser

Abstract

The invention discloses a system for detecting the gas tightness of a compressed natural gas dispenser, and specifically relates to the technical field of gas tightness detection. The system overcomes the defect that the existing gas tightness detection device can only detect the gas tightness of a device under a certain specific pressure value within a low pressure range. The system for detecting the gas tightness of the compressed natural gas dispenser comprises a gas source generator, a pressure adjustor, a gas tightness detector and a monitor, wherein the output end of the gas source generator is connected with the pressure adjustor, the gas tightness detector is connected with the pressure adjustor, the gas source generator comprises a high pressure compressor, the output end of the high pressure compressor is connected with a high pressure gas storage container, the pressure adjustor comprises a pressure stabilizing valve which comprises multiple branches, a valve is arranged at the outlet of each branch, the gas tightness detector comprises a lifting platform which is provided with a plurality of detection ports, an automatic control valve is arranged on each detection port, a ferrule is arranged at the outlet of the automatic control valve, and a test trough is arranged above the automatic control valve.

Description

technical field [0001] The invention relates to the technical field of air tightness detection of equipment, in particular to an air tightness detection system of a compressed natural gas dispenser. Background technique [0002] With the development of the national economy and the improvement of people's living standards, more and more attention has been paid to environmental protection. As one of the clean energy sources, natural gas has been widely used in many fields such as automobile fuel and heating. At present, natural gas energy mainly exists in the form of compressed natural gas, that is, CNG. Especially, the pressure value of CNG on the terminal filling machine of industrial CNG gas filling station reaches 20MPa. High, the air tightness test of the equipment must be carried out in the process of leaving the factory and putting into use. [0003] The existing patent discloses a valve air tightness detection device [patent number: 201220370018.7], the device include...

AI Technical Summary

Problems solved by technology

This method can only detect the airtightness of the equipment under a specific pressure value in the low pressure range. In addition, the detection instrument may have errors in the test of micro-leakage, and the pressure required for the airtightness test of high-pressure equipment such as CNG dispensers The value is high, the pressure points are many, and the required leakage is small, so the effect of simply checking the pressure holding value through the pressure gauge is not obvious. In addition, the test environment also needs to consider safety measures

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