Device and method for inner leakage detection of two-channel natural gas pipeline ball valve

Abstract

The invention relates to the technical field of natural gas pipeline detection, in particular to a device for inner leakage detection of a two-channel natural gas pipeline ball valve. The device comprises a power source, a first acoustic emission sensor, a second acoustic emission sensor, a signal amplifier, a boosting module, an analog-digital conversion module and a data acquisition module. The first and second acoustic emission sensors are connected with the signal amplifier, the signal amplifier is connected with the data acquisition module through a resistance regulation module; the data acquisition module is connected with an analytical equipment; the power source is connected with the signal source through the boosting module. The invention further provides a method for inner leakage detection of the two-channel natural gas pipeline ball valve. By the method, noise signals generated by the ball valve can be detected in the up stream and down stream of the natural gas pipeline ball valve at the same time, and whether or not inner leakage happens to the natural gas pipeline ball valve can be detected efficiently.

Description

technical field [0001] The invention relates to the technical field of natural gas pipeline detection, in particular to a double-channel natural gas pipeline ball valve internal leakage detection device and method. Background technique [0002] Ball valves are an important part of natural gas pipelines. Ball valves are mostly large-diameter and usually work under high pressure, so they need good sealing and no internal leakage. Once internal leakage will seriously threaten the safety of natural gas pipeline operation, it is necessary to accurately locate and quantitatively detect the leakage. Commonly used ball valve internal leakage detection methods mainly include: manual inspection, pressure drop detection, etc. The above detection methods are relatively simple, mainly through auditory and human eye observation to judge the internal leakage, but the subjective influence factors are high, the detection time is long, and quantitative analysis cannot be performed. , so it c...

AI Technical Summary

Problems solved by technology

Commonly used ball valve internal leakage detection methods mainly include: manual inspection, pressure drop detection, etc. The above detection methods are relatively simple, mainly through auditory and human eye observation to judge the internal leakage, but the subjective influence factors are high, the detection time is long, and quantitative analysis cannot be performed. , so it cannot meet the quantitative detection requirements of the existing ball valve internal leakage rate

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