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Positive and negative pressure combined plug flow fixed-point sampling device

A fixed-point sampling, positive and negative pressure technology, applied in the direction of sampling device, test sample preparation, etc., can solve the problems of fixed-point sampling, complicated process, hindering the production efficiency of coal seam, etc., and achieve the effect of high sampling work efficiency and simple process

Active Publication Date: 2014-05-07
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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  • Claims
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AI Technical Summary

Problems solved by technology

At present, the sampling methods of deep gas mainly include: core tube sampling, auger drilling to connect pulverized coal, compressed air injection sampling, etc. These sampling methods have the problems of complicated process, long sampling time and inability to sample at fixed points, which seriously hinder The production efficiency of coal seam mining restricts the development of productivity

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  • Positive and negative pressure combined plug flow fixed-point sampling device
  • Positive and negative pressure combined plug flow fixed-point sampling device

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0015] As shown in the figure, the positive and negative pressure combined plug flow fixed-point sampling device in this embodiment includes a double-walled drill pipe 1, a drill bit 2 arranged at the front end of the double-walled drill pipe 1, a four-way joint 3, a three-way joint 4, and a negative pressure generator. 5, gas-solid gravity separator 6 and sample collection tank 7, the drill bit 2 is fixedly connected with the outer wall of the double-walled drill rod, and the drill bit 2 is provided with an annular nozzle injector 8 fixedly connected with the inner wall of the double-wall drill rod, The ejection end of the annular nozzle injector 8 is provided with an air passage 8a that introduces the airflow outside the annular nozzle injector into the inner channel of the annular nozzle injector, and makes the air flow eject from the outlet side of t...

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Abstract

The invention discloses a positive and negative pressure combined plug flow fixed-point sampling device, which includes a double-wall drill rod, a drill bit, a four-way connector, a three-way connector, a negative pressure generator, a gas-solid gravity separator and a sample collection tank, as well as an annular nozzle ejector disposed in the drill bit. The rear end of the double-wall drill rod is sleeved with a two-channel faucet on the outside. The first channel of the two-channel faucet is connected to a first interface of the four-way connector, and the second channel of the two-channel faucet is connected to a first interface of the three-way connector. The second interface of the four-way connector is communicated with the second interface of the three-way connector. The third interface of the four-way connector is connected to the first air inlet of the negative pressure generator. During sampling, a material plug with a section of a sample and a section of compressed air is formed in a double-wall drill rod in-inner wall channel, and has small motion resistance in the double-wall drill rod in-inner wall channel. Driven by a negative pressure, the sample moves fast, and the sampling work has high efficiency. No plugging or drilling is needed in a sampling process, and the process is simple. Sampling can be performed at any drilling point, thus realizing fixed-point sampling.

Description

technical field [0001] The invention relates to a coal seam sampling device, in particular to a fast sampling device for deep hole coal samples. Background technique [0002] At present, the management of coal mine gas disasters is mainly based on regional prevention and control, supplemented by local measures. The rapid measurement technology of regional gas parameters has become an urgent problem to be solved. Therefore, deep hole sampling is the primary problem that needs to be solved. At present, the sampling methods of deep gas mainly include: core tube sampling, auger drilling to connect pulverized coal, compressed air injection sampling, etc. These sampling methods have the problems of complicated process, long sampling time and inability to sample at fixed points, which seriously hinder The production efficiency of coal seam mining restricts the development of productivity. Contents of the invention [0003] In view of this, the purpose of the present invention is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/08G01N1/34
Inventor 胡千庭文光才隆清明王艺树康建宁刘胜李秋林吴教锟吕贵春马代辉张淑同刘志伟黄长国李建功张睿
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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