Tube flange gas leakage detection device

Abstract

The invention discloses a tube flange gas leakage detection device, belonging to the petroleum chemical detection apparatus technical field, and comprises a gas port, a pneumatic joint, a micro negative pressure vacuum pump, a vacuum interface end, a gas source interface end, a detection silica gel tube, a pressure gauge, a pneumatic switch valve, a leak rate measuring instrument, etc. The tube flange gas leakage detection device is arranged on a pipeline, covers the periphery of a flange, and forms a cavity with a detected flange to accept tube flange leaked gas; in detection, the leak rate measuring instrument is communicated with an enclosed space through the silica gel tube. A calculation method is based on a tube flange leak rate formula derived by a gas state equation; the leak rate measuring instrument collects gas state parameters in an implementation process; a measuring instrument system processes data to obtain a tube flange leakage rate value. The device has the characteristics of less investment, simple operation, great practicality, and higher detection accuracy and result reliability, and is suitable for application and popularization.

Description

technical field [0001] The invention relates to a gas leakage detection device for pipe flanges, and specifically belongs to the technical field of petrochemical detection devices. Background technique [0002] Due to the large diameter range of gas pipelines, flange connections are generally used at pipe sections that need to be disassembled frequently and where pipes and equipment need to be connected. The tightness of flanges in gas pipelines will be deteriorated due to direct or indirect effects of various conditions. If a certain method or device cannot be used to detect flange leakage in time and take corresponding measures, the leakage will expand rapidly under the washing of the medium, endangering normal production and causing economic losses. If it is poisonous, harmful, flammable and explosive gas leakage, it may even cause major safety accidents such as personnel poisoning, fire, and explosion. Due to the different diameter ranges of gas pipelines, under the ex...

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Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention provides a pipe flange gas leakage detection device and a method for calculating the leakage rate thereof which are easy to use, have strong detection effectiveness, and relatively accurate and reliable results, and are helpful to solve the problems of pipe flanges in the petrochemical field. Leakage problems, and help production units to establish relevant leakage databases for regulatory analysis, to ensure normal production and avoid accidents

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