Multi-anti-rotating coring device

Abstract

The invention discloses a multi-anti-rotating coring device. The device comprises an outer pipe assembly and an inner pipe assembly, and the inner pipe assembly is connected with the outer pipe assembly in a clamped mode; the inner pipe assembly comprises an inner pipe assembly and a center assembly, and a composite bearing set is arranged between the inner pipe assembly and the center assembly; the composite bearing set comprises a base, the base is in the form of a thrust bearing, the base is arranged in the inner pipe assembly, and a ball recess in an annular shape is formed in the inner wall of the base; and multiple ball holes are formed in the middle of a positioning pipe section in the circumferential direction, spherical rollers are arranged in the ball holes, and the protruding parts of the spherical rollers are matched with the ball recess. According to the device, a coring barrel can be prevented from rotating, the external interference is reduced, and errors between the coring component and real conditions are reduced.

Description

technical field [0001] The invention relates to the field of coal mine tunnel coring equipment, in particular to a multiple anti-rotation 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] For coal seam tunnel corin...

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] For coal seam tunnel coring, there is a publication number of CN204646157U in the prior art, which is named as a coalbed gas rope coring device, and a coring device with a publication number of CN107905752A. Insufficient torsion capacity,

[0004] 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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