Length measuring device of gas drainage pipe in drill hole
A technology of length measurement and gas drainage, which is applied in the direction of gas discharge, mining equipment, safety devices, etc., can solve the problems of difficulty in measuring the length of the drainage pipe, the number of solid pipes and screen pipes in the drainage pipe cannot be measured, and achieve improved The effect of measurement accuracy and connection reliability, simple device, convenient and quick operation
Pending Publication Date: 2019-07-19
GUIZHOU PANJIANG REFINED COAL
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a device for measuring the length of the gas drainage pipe in a borehole, so as to solve the difficulty in measuring the length of the gas drainage pipe in the existing underground coal mine borehole and the problem of the length of the gas drainage pipe. The number of actual pipes and screens cannot be measured, etc.
Method used
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Embodiment 1
[0025] Embodiment 1: as Figure 1-Figure 10 As shown, a device for measuring the length of a gas drainage pipe in a borehole includes a center rod 1, a hollow ball head 2, a moving rod 3, a hose 7, and a casing 4. A through hole 9 is provided at the end of the casing 4, and there are 4 sets of casings. Connected to the moving rod 3, there is a water spray hole 8 around the hollow ball head 2, and it is fixedly connected to one end of the central rod 1, the moving rod 3 is sleeved on the other end of the central rod 1, and the hose 7 passes through the moving rod 3 and the center The rod 1 is connected to the hollow ball head 2 and communicated with its inside, and the hose 7 is connected to a high-pressure water source.
[0026] Preferably, the lower end of the central rod 1 is provided with a lower annular magnet 5, the distance from the lower end surface is 5 mm, and the upper end of the moving rod 3 is provided with an upper annular magnet 6. When the upper end of the movin...
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Abstract
The invention discloses a length measuring device of a gas drainage pipe in a drill hole. The length measuring device comprises a center rod, a hollow ball head, a moving rod and a hose; water spraying holes are formed in the periphery of the hollow ball head, and the hollow ball head is fixedly connected to one end of the center rod; the moving rod sleeves the other end of the center rod; and thehose penetrates through the moving rod and the center rod and then is connected to the hollow ball head and communicates with the interior of the hollow ball head. The length of the drainage pipe canbe measured by the length measuring device constituted by the hose, the stretching center rod and the moving rod; and the device is simple, reliable in using and quick and convenient to operate, andthus the problems that after the drainage pipe is placed in the gas drill hole in an existing underground coal mine, the length of the drainage pipe is difficult to measure, and the quantity of actualpipes and sieve pipes in the drainage pipe cannot be measured are solved.
Description
technical field [0001] The invention relates to a device for measuring the length of a gas drainage pipe in a borehole. Background technique [0002] Drilling rigs are often used in underground coal mines to drill up holes in the coal seam for gas drainage. After the drilling is completed, gas drainage pipes need to be placed for gas pre-extraction. The gas drainage pipes need to be used in conjunction with solid pipes and screens to ensure better Draw effect. During the process of placing the drainage pipe, some workers did not place it according to the standards and requirements, resulting in the length of the drainage pipe in the borehole being insufficient and the number of actual pipes and screen pipes not meeting the design standards, resulting in the borehole being a waste hole and losing gas Drainage affects the normal mining of coal seams. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a device for me...
Claims
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Login to View More IPC IPC(8): E21F17/18E21F7/00
CPCE21F17/18E21F7/00
Inventor 谢红飞魏晏军徐再刚薛锦包勇刘伟
Owner GUIZHOU PANJIANG REFINED COAL