Wind-speed influence test device of methane alarming mine lamp

Abstract

The invention relates to a wind-speed influence test device of a methane alarming mine lamp, which is mainly used for enhancing test efficiency, the accuracy of test results and the like. In the technical scheme of the invention, a gas analyzer is arranged on the test device and respectively connected with a wind tunnel and a controller, and the controller is connected with a sample gas component; through the starting-up setting of the controller, the test device can automatically adjust the concentration of methane in the wind tunnel step by step from low to high and detect concentration, provide an alarming signal and display an alarming point when an test sample alarms, and record the information of date, time and like; and the test device is suitable for wind-speed influence test of various methane alarming mine lamps.

Description

Technical field: [0001] The invention relates to a miner's lamp of a portable lighting device, in particular to a test device for a methane alarm miner's lamp. Background technique: [0002] The methane alarm miner's lamp is widely used in underground coal mines. It has the functions of portable lighting and methane over-limit alarm. Using this device can monitor the methane content of the underground coal mine workplace at any time. When the methane content reaches or exceeds the set alarm point, it can emit a sound. or lights and other alarm signals to notify operators to take necessary prevention and control measures. Alarm The alarm function of the miner's lamp is mainly realized by the carrier catalytic element and the control circuit, and there is wind flow in the coal mine, and the wind speed has a great influence on the output signal of the catalytic element. If the automatic compensation performance of the control circuit is poor, it will lead to the actual alarm. ...

AI Technical Summary

Problems solved by technology

Since the value of the actual alarm point of the alarm miner's lamp is not known before the test, the test process must not only keep the wind speed constant, but also continuously adjust the concentration of methane gas. The test process is complicated. There are two existing test methods and corresponding devices. : One is to use an open wind tunnel, control the wind speed in the wind tunnel at 8m / s, and then feed methane gas into the wind tunnel. This method cannot guarantee that the concentration of methane gas in the wind tunnel meets the specified requirements, and it cannot be measured The actual concentration of methane gas in the wind tunnel, the test results are very inaccurate; the other is to use a sealed annular wind tunnel, adjust the wind speed in the wind tunnel, and then slowly inject high-concentration methane gas into the wind tunnel, when the test sample When the alarm is triggered, the gas sample in the wind tunnel is manually taken and the methane concentration is measured. The test process is completely controlled by the operator. This method is difficult to accurately control the amount of methane entering the wind tunnel and the methane concentration in the wind tunnel. The accuracy of the test results is also poor

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