A large-diameter broken core extraction device

Abstract

The invention discloses a large-diameter broken core extraction device, comprising: a lifting sleeve assembly and a diamond saw wire assembly; the diamond saw wire assembly is provided with a saw wire for cutting the rock core; the lifting sleeve assembly includes a The sleeve main body on the outer periphery of the core, the fastening mechanism for grasping or loosening the rock core and the saw wire fixing part for passing the saw wire, the fastening mechanism and the saw wire fixing part are all arranged on the sleeve main body; The rope fixing part is arranged along the circumference of the sleeve main body, and the opening of the saw rope fixing part faces the rock core so that the saw rope can be attached to the rock core when tightened. Compared with the existing technology, the rock core can be cut at one time by cutting with a saw wire and fastened by a fastening mechanism, with fast speed, low energy consumption, no shock and vibration, and flat cross section. core for cutting.

Description

technical field [0001] The invention relates to the technical field of rock coring, in particular to a large-diameter broken core extraction device. Background technique [0002] In the process of pile foundation construction, geological exploration, stone mining, etc., it is sometimes necessary to excavate large-diameter foundation pits or extract large-diameter core samples in hard rock formations. At this time, the more energy-saving and fast method is to use nesting cutting. A ring groove is machined along the depth direction around the core, and then the core is cut and extracted. [0003] The existing core breaking technology is aimed at rock cores with a diameter not greater than 76mm. For complete rock cores, drawing, twisting, bending and other methods are used to break them away from the bedrock. However, for complete hard rock pillars with large diameters, These methods require too much power to be feasible. [0004] In the prior art, the improved cylindrical dr...

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Problems solved by technology

[0004] In the prior art, the improved cylindrical drill bit with narrow bottom and wide top can cooperate with the rock holder to realize the coring of the rock, and an integrated cooling and dust suction device is installed, although the damage of the drill bit to the core is reduced to a certain extent. , can guarantee the integrity and accuracy of soft rock coring, but the application field is limited, it is only suitable for weak rocks with low rock hardness; or it can also be equipped with combined reamers, stabilizers and external reinforcement components for core sampling The device realizes core cutting. Although the multi-cutting element drill bit is used to realize core cutting, the cutting efficiency is slow and the cutting power consumption is large for large-diameter hard rock cutting.

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