Probe built-in type hydrogen gas leakage detector

Abstract

This invention relates to a kind of probe built-in type hydrogen leak detector, includes external air suction pipe, minitype aspirator pump, hydrogen agile probe, signal processing circuit and indicating circuit. the character lay: hydrogen agile probe and minitype aspirator pump built in hydrogen leak detector; entry of minitype aspirator pump connect with end of external air suction pipe; hydrogen agile probe put at outlet pipe of minitype aspirator pump; hydrogen agile probe adopt hydrogen agile semiconductor transducer, its signal output end connect with input end of signal processing circuit; Signal processing circuit's output signal is send to indicating circuit to process detecting outcome and setting leak source.

Description

Technical field [0001] The invention belongs to the field of gas leakage detection, and in particular relates to a probe built-in hydrogen leak detector that uses a hydrogen tracer method to detect leaks in inflatable cables or pipelines. Background technique [0002] Chinese patent ZL01236193.3 discloses a "gas-filled cable hydrogen leak detector", which is a device that uses hydrogen tracer to detect gas-filled cables. It uses an external hydrogen sensitive probe to detect hydrogen gas After the signal is converted into an electrical signal, it is directly sent to the amplifying circuit through the signal transmission line for amplification and the indicator circuit displays the detected hydrogen concentration detection result. The device has the following shortcomings: [0003] 1. In order to improve the detection sensitivity and response speed, the hydrogen sensitive semiconductor sensor in the external hydrogen sensitive probe uses a hydrogen sensitive palladium gate field e...

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Problems solved by technology

However, at present, inflatable cables are mostly laid in underground pipelines, and the environment where pipeline leakage needs to be detected is mostly underground water or sludge with high water content. Therefore, the application range of the external hydrogen-sensitive probe is limited.

[0004] 2. The forms of external hydrogen-sensitive probes mainly include hand-held probes, ground probes, aerial probes, pipeline probes, etc. In actual working conditions, due to the natural flow of air, hydrogen is easy to diffuse, especially when there is wind, hydrogen rises to the ground Afterwards, it is easy to blow away, which is not conducive to the rapid and accurate positioning of leak points, resulting in a decrease in detection sensitivity

[0005] 3. There is no continuous data storage and any digital processing means, only using the signal amplitude as the criterion, and reminding the inspectors of different concentrations of hydrogen content through the alarm, it is difficult to distinguish and determine the direction of movement only by the change of the alarm volume in use, and it is necessary to constantly compare the current It is difficult to judge the strength of the signal received at the position and the position just now, for different sensitivity settings or changes in signal strength at different positions, and it is impossible to intuitively indicate the direction of the leak point and accurately locate it

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