Gas-collecting hood method leakage detection system for liquid accumulator leakage detection and leakage detection method thereof

Abstract

The invention discloses a gas-collecting hood method leakage detection system for liquid accumulator leakage detection and a leakage detection method thereof. The gas-collecting hood method leakage detection system comprises a workpiece clamp, an inflation bottle, a leakage detection water tank, a gas-collecting hood and a leakage detector. A first detection pipe is connected to an air inlet pipe of a liquid accumulator, the inflation bottle is connected with the first detection pipe through an inflation pipe, and an inflation two-way valve is arranged on the inflation pipe; the other end of the first detection pipe is provided with a pressure sensor, the lower half portion of the gas-collecting hood is located below the horizontal plane, the upper half portion of the gas-collecting hood is located above the horizontal plane, the leak detector is connected to the upper half portion of the gas-collecting hood through a second detection pipe, and the second detection pipe is provided with a detection two-way valve. The leakage detection result can be automatically judged, human factor misjudgment and equipment factor misjudgment are completely eradicated, the detection result is more reliable, an observer is replaced with the leakage detector, labor and management cost is reduced, the liquid storage device is always located in the gas collecting hood in the detection process, safety is good, the structure is simple, use is convenient, and production efficiency is high.

Description

technical field [0001] The invention belongs to the field of leak detection of liquid storage devices, and in particular relates to a leak detection system and a leak detection method for liquid storage device leak detection using a gas collecting hood method. Background technique [0002] Liquid receiver leakage detection technology is the key technology for the production of liquid receiver assemblies (including vapor-liquid separator assembly, muffler assembly, etc.) ), high sealing requirements (allowable leakage rate is less than 1 / 10000), so the leakage detection technology of the reservoir also needs to be continuously improved. At present, there are mainly two types of leak detection technologies and equipment used in the production of liquid reservoirs: [0003] 1. Visual inspection by bubble method [0004] Such as figure 1 Shown: Reservoir Leak Detection (Visual Bubble Detection) [0005] The detection method is as follows: ①Manually clamp and fix the liquid r...

AI Technical Summary

Problems solved by technology

[0014] 1. Visual inspection by bubble method: ①The leakage of the reservoir depends on the "human judgment" after visual inspection by observers. Because there are too many unknown factors that affect the judgment of personnel, the accuracy of detection is low

②Each device requires 1-2 observers, which increases labor and management costs

③During the detection process, the liquid reservoir is filled with high-pressure test gas (3-5MPa), and observers need to work close to the liquid reservoir, so the safety is poor

[0015] 2. Helium detection by vacuum box method: ①The equipment is expensive, which is 5-10 times that of the bubble method visual detection equipment

②Due to helium pollution, especially false leakage at the nozzle seal of the reservoir, etc., the system often has "false alarms", resulting in wrong judgments

③Although it is a dry leak detection, the reservoir does not need to be dried after the leak detection, but it increases the workload and difficulty of "removing the flux of the reservoir" and "anti-rust on the surface of the reservoir"

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