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CN-224231320-U - Closed coal dust collection device for coal bed gas content measurement sampling

CN224231320UCN 224231320 UCN224231320 UCN 224231320UCN-224231320-U

Abstract

The utility model discloses a closed coal dust collecting device for measuring and sampling coal bed gas content, which comprises a sampling tube, an inclined three-way tube and front and rear end covers, wherein the inclined three-way tube is provided with an inclined outlet, a front tube end and a rear tube end, the inclined outlet is connected with a coal dust collecting bag in an inclined upward extending mode, the front tube end is coaxially connected with the front end cover, a through hole for a coal drill rod to penetrate is formed in the upper end of the front end cover, and the rear tube is axially communicated with the sampling tube. Compared with the prior art, the closed coal dust collecting device for measuring and sampling the gas content of the coal seam ensures that a coal sample smoothly enters a sampling tube through a conical structure and an axial communication design, effectively isolates external coal dust by double sealing of a dustproof brush and an air bag, avoids flying of the coal dust in the sampling process, creates a good working environment for workers, and realizes quick assembly and disassembly of a butterfly buckle and an elastic ring so as to improve the working efficiency of underground workers.

Inventors

  • ZHAO GUOQIANG

Assignees

  • 河南智博惠润科技有限公司

Dates

Publication Date
20260512
Application Date
20250328

Claims (8)

  1. 1. A closed coal dust collecting device for measuring and sampling the gas content of a coal bed is characterized in that, Comprises a sampling tube, an inclined three-way tube and front and rear end covers; The inclined tee pipe is provided with an inclined outlet, a front pipe end and a rear pipe end, wherein: the inclined outlet is connected with the coal dust collecting bag in an inclined upward extending mode; The front pipe end is coaxially connected with the front end cover, and a through hole for the coal drill rod to penetrate is formed in the upper end of the front end cover; the rear pipe end is axially communicated with the sampling pipe.
  2. 2. The closed coal dust collecting device for measuring and sampling the gas content of the coal bed according to claim 1, wherein an air bag used for sealing the hole wall is arranged on the outer wall of the sampling tube, and an air charging nozzle is arranged on the air bag.
  3. 3. The closed coal dust collecting device for measuring and sampling the gas content of the coal bed according to claim 1, wherein the lower end of the inclined three-way pipe is of a conical structure with a large upper part and a small lower part, the rear pipe end is positioned at the center of the lower end of the conical structure, and the upper end of the sampling pipe is inserted into the rear pipe end.
  4. 4. The closed coal dust collection device for measuring and sampling gas content in coal seam according to claim 1, wherein the pipe end cover comprises a front straight pipe section, a conical pipe section and a rear pipe section which are integrally formed from top to bottom, wherein the conical pipe section is small in top and large in bottom, and the rear pipe end is inserted into the rear end cover.
  5. 5. The closed coal dust collecting device for measuring and sampling the gas content of the coal bed according to claim 4, wherein a plurality of clamping grooves which are uniformly distributed along the circumferential direction are formed in the opening edge of the front pipe end, the clamping grooves are L-shaped, a plurality of studs which correspond to the clamping grooves one by one are arranged on the outer wall of the front end cover, and butterfly buckles used for fixing the front end cover and the inclined three-way pipe are connected to the studs in a threaded mode.
  6. 6. The closed coal dust collecting device for measuring and sampling gas content in coal seam according to claim 4, wherein a dustproof brush is arranged in the front pipe end, the dustproof brush comprises a fixed ring and a plurality of bristles on the inner wall of the fixed ring of the connecting pipe, the fixed ring is fixedly connected to the inner wall of the front pipe end, and the front end parts of the plurality of bristles enclose a central hole coaxial with the through hole and penetrated by a coal drill rod.
  7. 7. The closed coal dust collecting device for measuring and sampling the gas content of the coal bed according to claim 1, wherein two handles are arranged on the outer wall of the inclined three-way pipe, and the two handles are symmetrically arranged about the inclined outlet.
  8. 8. The closed coal dust collecting device for measuring and sampling the gas content of the coal bed according to claim 1, wherein an annular groove for accommodating an elastic ring to fix the coal dust collecting bag is arranged on the opening edge of the inclined outlet.

Description

Closed coal dust collection device for coal bed gas content measurement sampling Technical Field The utility model relates to the field of illumination, in particular to a closed coal dust collecting device for measuring and sampling the gas content of a coal bed. Background The coal and gas outburst is an abnormal dynamic phenomenon that broken coal, rock and gas are suddenly thrown out to a mining space from the coal body or the rock body under the combined action of ground stress and gas, is a strong natural disaster for underground production of a coal mine, seriously threatens the safe production of the coal mine, and has great destructiveness. The scientific and accurate prediction of the outburst of the coal and the gas is the premise and the key point for guiding the reasonable and effective implementation of the prevention and treatment measures of the outburst of the coal and the gas, so that the prediction of the outburst of the coal and the gas has great practical significance. In recent years, the gas content of coal seams has been widely used for predicting the risk of coal and gas outburst. The determination of the gas content is divided into a direct method and an indirect method, wherein the direct method is to directly determine the gas content of a coal bed by taking a coal sample from a coal mine underground site. The method comprises the steps of on-site sampling, sealing and measuring the gas analysis characteristic of the coal, and calculating the gas analysis characteristic and the coal in a certain initial exposure time And calculating the gas loss, and further calculating the gas content through equipment. The sampling is usually carried out by adopting a mode of connecting a percussion drill or an electric drill with a coal drill rod, and a large amount of coal dust flows out from the rear end of the coal dust in the process of taking the coal sample, so that coal dust flies, the pollution to the working environment is caused, and the health of workers is not good. Disclosure of utility model In order to solve the problems, the utility model aims to provide a closed coal dust collecting device for measuring and sampling the gas content of a coal bed. The utility model relates to a technical scheme of a closed coal dust collecting device for measuring and sampling gas content in a coal bed, which comprises the following steps: A closed coal dust collecting device for measuring and sampling the gas content of a coal bed comprises a sampling tube and front and rear tube end covers of an inclined three-way tube; The inclined tee pipe is provided with an inclined outlet, a front pipe end and a rear pipe end, wherein: the inclined outlet is connected with the coal dust collecting bag in an inclined upward extending mode; The front pipe end is coaxially connected with the front end cover, and a through hole for the coal drill rod to penetrate is formed in the upper end of the front end cover; the rear pipe end is axially communicated with the sampling pipe. Further, an air bag used for sealing the hole wall is arranged on the outer wall of the sampling tube, and an air charging nozzle is arranged on the air bag. Furthermore, the lower end of the inclined three-way pipe is in a conical structure with a large upper part and a small lower part, the outlet of the rear pipe end is positioned at the center of the lower end of the conical structure, and the upper end of the sampling pipe is inserted into the outlet of the rear pipe end. Further, the mouth edge of the front pipe end is provided with a plurality of clamping grooves which are uniformly distributed along the circumferential direction, the clamping grooves are L-shaped, the outer wall of the front end cover is provided with a plurality of studs which are in one-to-one correspondence with the clamping grooves, and the studs are connected with butterfly buckles for fixing the front end cover and the inclined three-way pipe in a threaded manner. Further, the dustproof brush is arranged in the front pipe end and comprises a fixed ring and a plurality of bristles on the inner wall of the fixed ring of the connecting pipe, the fixed ring is fixedly connected to the inner wall of the front pipe end, and the end parts of the plurality of bristles enclose a central hole coaxial with the through hole and penetrated by the coal drill rod. Further, two handles are arranged on the outer wall of the inclined tee pipe, and the two handles are symmetrically arranged about the inclined outlet. Further, an annular groove for accommodating the elastic ring to fix the coal dust collecting bag is arranged on the opening edge of the inclined outlet. The utility model provides a closed coal dust collecting device for measuring and sampling the gas content of a coal bed, which has the beneficial effects that compared with the prior art: When the closed coal dust collecting device for measuring and sampling the gas content of the coal bed is used, the impac