Coal mine underground gas sampling device and method

Abstract

A coal mine underground gas sampling device comprises a bag body, gas cylinders, rubber pipes, pipe orifice switchers and an air pump, wherein the gas cylinders are arranged in the bag body side by side, the two ends of each rubber pipe are connected with the corresponding gas cylinder and the corresponding pipe orifice switcher respectively, and the pipe orifice switchers are connected with the air pump. The gas collecting process includes the following steps that one pipe orifice switcher is adjusted to the target gas cylinder to collect a gas sample, and gas collection of the gas cylinder is completed when a gas bag inflates; gas collection of the next pipe is conducted; when the gas samples need to be collected continuously, the corresponding pipe orifice switcher is directly adjusted and sequentially collects the gas sample from other gas cylinders; when the gas samples need to be collected interruptedly, gas collection of the next pipe is conducted after the corresponding pipe orifice switcher exhausts residual gas inside, and collection of different gases is sequentially completed. The gas sampling device is convenient to carry and convenient to operate, effectively reduces the carrying size, ensures gas sample seal performance, meets the requirement of continuous sampling, improves working efficiency of underground safety monitoring staff, distinguishes the underground danger source in time and ensures life safety of staff and economic benefits of an enterprise.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of goaf gas monitoring, and in particular relates to a coal mine underground gas sampling device and method. [0003] Background technique: [0004] Underground mined-out area is a key area for prevention and control of coal spontaneous combustion. With the popularization of fully mechanized mining technology, the generation of residual coal is still inevitable. The residual coal undergoes oxidation and heat storage in the mined-out area and eventually leads to spontaneous combustion, threatening the life safety of underground personnel and Freeze a large amount of mineral resources. The gas samples in the goaf are collected through the bundle pipes laid in the goaf underground, and then through the analysis of the index gas in the gas sample, it is judged whether the coal remaining in the goaf is in danger of spontaneous combustion or whether it has spontaneously ignited, so that it can be Take meas...

AI Technical Summary

Problems solved by technology

[0005] The current gas sample collection work is a manual labor with cumbersome procedures and low efficiency. The gas sample collection personnel need to connect the two ends of the manual air pump to the bundle tube and the gas sample ball respectively, and deliver the gas sample into the gas sample ball by constantly grasping the manual air pump. , after the gas sample is filled with the gas sample ball, the gas sample ball is sealed and then all connections are disconnected, resulting in a slow gas sample collection speed, and when a large number of gas samples need to be collected, a large number of filled gas sample balls will also cause Disadvantages of large carrying volume and easy confusion of various gas samples

The traditional gas sample collection method leads to too long time interval between two gas samples before and after collection, which makes it impossible to collect continuously, let alone determine that a certain gas sample is within a certain period of time during the collection process, which reduces the accuracy

[0006] From the above analysis, it can be seen that there are too many drawbacks in the current gas sample collection methods and equipment, so it is necessary to propose a portable gas sample collection device and method to improve the current defects.

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