Anti-rotation mechanism for core remover

Abstract

The invention discloses an anti-rotation mechanism for a core remover. The anti-rotation mechanism includes a composite bearing set. The composite bearing set is arranged between an inner tube assembly and a center assembly. The center assembly includes a positioning pipe section. The composite bearing set includes a base which is in a form of a thrust bearing, the base is fixedly connected to theinner wall of the inner tube assembly, an annular ball concave is arranged on the inner wall of the base, a plurality of ball holes are formed in the circumferential direction in the middle of the positioning pipe section, a spherical roller is installed in each ball hole, and the protruding part of the spherical roller fits the ball concave. When the positioning pipe section moves upwards by anexternal force, the spherical roller can slide out of the ball concave. The anti-rotation mechanism can prevent a core removing cylinder from rotating, the external interference is reduced, and the error between the core removing component and the real situation is reduced.

Description

technical field [0001] The invention relates to the field of coal mine tunnel coring equipment, in particular to an anti-rotation mechanism for a coring device. Background technique [0002] my country is not only a big coal producer, but also a big coal consumer. Coal is an important basic energy and raw material for our country. Coal seam gas content and coal seam gas pressure are the main indicators of outburst coal seam outburst risk area prediction and regional effect inspection. Coal seam gas content is usually measured by ground coal seam gas content measurement, geological survey gas content measurement, coal seam drilling and coring in underground mines, etc. Due to the differences in the test conditions and methods of coal seam gas content, the test results of the above coal seam gas content often have large differences and low accuracy, and there are widespread estimation losses, which have limited guiding significance for coal mining. [0003] The coring device ...

AI Technical Summary

Problems solved by technology

Coal seam gas content and coal seam gas pressure are the main indicators of outburst coal seam outburst risk area prediction and regional effect inspection. Coal seam gas content is usually measured by ground coal bed gas content measurement, geological survey gas content measurement, coal seam drilling and coring in underground mines, etc. Due to the differences in test conditions and methods of coal seam gas content, the test results of the above coal seam gas content often have large differences and low accuracy, and there are widespread estimation losses, which have limited guiding significance for coal mining

[0003] The coring device is usually composed of an inner tube assembly and an outer tube assembly. There is a gap between the inner tube assembly and the outer tube assembly, which will cause the coring cylinder to rotate with the coring outer cylinder easily. When the external disturbance is large, There may be a large error between the coring composition and the actual situation. In order to reduce the error caused by the rotation, the currently used coring device is often equipped with a single-action device between the outer tube assembly and the inner tube assembly to reduce the rotation of the coring cylinder. , but although the single-action device has the function of anti-rotation, the core cylinder still rotates to a certain extent, and it is difficult to effectively reduce the measurement error

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