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Counter-rotating sealing coal sample sampler and application method thereof

A sampler and coal sample technology, applied in the direction of sampling devices, etc., can solve the problems of coal seam gas content measurement error, gas loss, softness and other problems, and achieve accurate determination of gas content, reduction of gas loss, and reduction of gas loss. Effect

Inactive Publication Date: 2012-03-21
NORTH CHINA INST OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The desorption speed of coal cuttings is very fast at the initial stage of separation from the coal body. If the lump coal sample can be taken out, the gas loss during the sampling process will be greatly reduced. lumpy coal sample
In addition, although many devices for directly sampling and measuring gas content have been developed at home and abroad, such as ordinary single-layer sampling pipes and double-layer sampling pipes, there is no major breakthrough in the sampling methods and principles, and the gas loss during the sampling process is serious, resulting in There are large errors in the measured coal seam gas content measurement results, which is not conducive to the formulation and effective implementation of gas control measures

Method used

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  • Counter-rotating sealing coal sample sampler and application method thereof
  • Counter-rotating sealing coal sample sampler and application method thereof
  • Counter-rotating sealing coal sample sampler and application method thereof

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. For ease of description, "up" and "down" hereinafter are consistent with the up and down directions in the accompanying drawings, but during use, the device is used horizontally, and the direction of "up" is towards the coal seam.

[0017] Such as figure 1 As shown, the sampler of the present invention includes a combined drill bit 1 , a coal sample cylinder 2 , a sealing disc assembly 3 , a sealing shaft assembly 4 , a sealing dial assembly 5 and a reducing joint 6 .

[0018] Such as figure 1 , image 3 As shown, the combined drill bit 1 of the present invention comprises a cylindrical drill seat 11, a central drill bit 12 is arranged at the center of the drill seat 11, and four holes are evenly arranged on the same circumference of the drill seat 11 with the central drill bit 12 as the center. Small drill bits 13 are evenly arranged with eight smal...

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Abstract

The invention relates to a counter-rotating sealing coal sample sampler and an application method thereof; the sampler of the invention comprises a combined drill, a coal sample cylinder, a sealing disc assembly, a sealing shaft assembly, a hole-sealing drive-plate assembly and a diameter-variable joint; The combined drill is connected with the upper end of the coal sample cylinder; a pressure plate of the sealing disc assembly presses a sealing disc on a concave plateform of the coal sample cylinder; a coal inlet is disposed on the sealing disc; a sealing sleeve of the sealing shaft assemblyis connected inside a through hole of the coal sample cylinder; a drive plate of the hole-sealing drive-plate assembly drives the coal sample cylinder to rotate by cooperating with a drive block at the bottom of the coal sample cylinder; a arc-shaped key groove drives the sealing shaft assembly to rotate by cooperating with a drive block on the sealing sleeve; the whole sampler is connected to a drilling rod by the diameter-variable joint; when the drilling machine performs counter-rotation, a sealing head enters the coal inlet of the sealing disc to complete coal sample sealing; gas in the coal sample enters a gas desorption device through a rapidly-connected device at the end of the sealing shaft assembly, and an underground on-site gas desorption test is performed. The sampler of the invention is widely applicable to determination and detection of coal mine coal seam gas content.

Description

technical field [0001] The invention relates to a coal sampler and its use method, in particular to a reverse-sealed coal sampler for measuring the gas content of coal seams and its use method. Background technique [0002] Coal seam gas content is one of the important parameters reflecting the occurrence of coal seam gas, and it is an important basis for calculating coal seam gas reserves, predicting mine gas emission, designing gas drainage and evaluating the risk of coal and gas outburst in coal seams. The accuracy of gas content measurement not only restricts the reliability of mine gas hazard prediction, but also affects the effectiveness and economy of gas control measures based on gas hazard prediction, and even endangers mine safety production. At present, the coal seam gas content determination methods mainly include indirect method and direct method. The indirect method uses the Langmuir formula to calculate the coal seam gas content according to the measured coal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/08
Inventor 陈绍杰宋寿江郭银龙于猛
Owner NORTH CHINA INST OF SCI & TECH
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