Gas detection device and use method

Abstract

The invention discloses a gas detection device and a use method. The gas detection device comprises a test tube, wherein a scale is arranged on the outer side wall of the test tube; an upper end coveris detachably connected to an upper end opening of the test tube, a slight-adjusting rubber plug is connected to the top wall of the upper end cover, the slight-adjusting rubber plug comprises a screw, a rubber plug body is fixed to the exactly lower end of the screw, and an adjustment handle is fixed to the upper end of the screw; and a lower end cover is detachably connected to a lower end opening of the test tube, a U-shaped drain pipe is connected into the left portion of the lower end cover, an inflation pipe is connected into the right portion of the lower end cover, the free end of theinflation pipe is located outside the lower end cover and is used for being connected with a gas outlet pipe of a gas desorption device, and when the lower end cover covers the lower end opening of the test tube, the other end of the drain pipe and the other end of the inflation pipe are both communicated with the bottom of the test tube. The device is convenient to clean, and the initial heightof the water level in the test tube can be conveniently adjusted, that is, zero adjustment is convenient.

Description

technical field [0001] The invention belongs to the technical field of coal seam gas survey, and in particular relates to a gas survey device and a use method. Background technique [0002] The occurrence forms of gas in coal seams are free state and adsorbed state, among which adsorbed gas accounts for about 90% of the total gas content. A large amount of adsorbed gas desorbs in coal and gas outbursts, participates in crushing coal bodies and throwing coal out. In the process of coal mining, gas is desorbed from the coal body, which may cause gas accidents. If it can be developed and utilized reasonably, gas will become a clean and efficient energy source. Therefore, there is a need for an experimental device that can detect the content of adsorbed gas in a certain amount of coal sample taken by the gas desorption device for desorption, so as to formulate reasonable gas mining measures. [0003] Existing gas survey devices are roughly divided into two categories: electroni...

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Problems solved by technology

[0003] Existing gas survey devices are roughly divided into two categories: electronic and mechanical, but the electronic is extremely costly and easily damaged, while the mechanical is low in cost but cumbersome to operate, and these two types are not easy to clean; and the existing It is inconvenient to adjust the initial height of the liquid level in the pipe body, and then it is inconvenient to adjust zero

In a gas survey device in the prior art, the water injection port of the pipe body has a small opening under the base, which is inconvenient for water injection. The zero adjustment is done by blowing air through the mouth, and the final cleaning is to remove the cleaning aid from the water injection port. Squeeze in, fill with water and shake, cleaning is not clean and inconvenient

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