Full-pressure tiny leak precision measurement system

Abstract

The invention belongs to the technical field of measurement, and in particular relates to a full-pressure tiny leak precision measurement system which is composed of a ball valve, a stop valve, a three-way sealing valve, a high-precision differential pressure gauge, an instrument control unit, a timer, a vacuum pump, a constant volume chamber, a gas distribution chamber, a gas cylinder and a pipejoint. The ball valve is adopted to cause the constant volume chamber with a known volume to be connected with the gas distribution chamber through a pipe, the stop valve is used to be connected withthe high-precision differential pressure gauge, and the three-way sealing valve is connected with the vacuum pump. After a part to be measured, the high-precision differential pressure gauge, the constant volume chamber and the gas distribution chamber reach the pressure balance, the ball valve is switched off, the stop valve is switched on to enable tiny leaked gas to be introduced into the constant volume chamber through a pipe, the gas flows to the gas distribution chamber through the high-precision differential pressure gauge, and the accumulated pressure change of the part to be measuredover time can be obtained. The full-pressure tiny leak precision measurement system has the advantages of being convenient to operate, small in size, wide in measurement range, high in measurement precision, not subjected to interference of gas source medium, capable of performing full pressure measurement, convenient to carry and low in cost.

Description

technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to a precision measurement system for full pressure micro-leakage. Background technique [0002] At present, the leak detection measurement of some pressure storage containers, valves, pipelines and tiny electronic components mainly disassembles the parts and sends them to the measurement department with leak detectors for leak detection. If the leak is found, the leak is plugged and then assembled and delivered. During assembly, due to interference factors such as vibration, secondary extrusion of the rubber ring, seals, and material outgassing rate, it will inevitably cause local re-leakage, and relatively small components or special products cannot be stored for the second time, which directly affects the delivery of products. the quality of. [0003] Leak detection can also be carried out by transporting the leak detector to the site of use, using the sniffing g...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a small leak precision measurement system for different pressure conditions, which solves the problems of high cost, complicated process, inability to track leaks, inconvenient portability, etc.

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