Continuous rotary drilling device suitable for large-diameter casing pipe construction

Abstract

The invention discloses a continuous rotary drilling device suitable for large-diameter casing pipe construction. The continuous rotary drilling device comprises a continuous rotary mechanism, a lifting mechanism, a power mechanism and a control mechanism, wherein the continuous rotary mechanism comprises a rotary disc, a thrust block and a pipe twisting oil cylinder; a casing pipe is inserted into the rotary disc; and the lifting mechanism is arranged below the rotary disc and can conduct lifting adjustment on the rotary disc. According to the continuous rotary drilling device, downward pressure and torque are generated during operation, the casing pipe is driven to rotate, cutting drilling is conducted on a soil body, a rock stratum and the like, and the continuous rotary drilling deviceis mainly used for pile foundation engineering construction of the large-diameter casing pipe. Compared with small-angle rotation of an existing pipe twisting machine, the continuous rotary drillingdevice utilizes intermittent alternate work of the pipe twisting oil cylinder to achieve continuous rotary action of the rotary disc, thus the casing pipe is driven to conduct 360-degree continuous rotation, the casing pipe is pressed in and pulled out, the drilling efficiency is high, and practicability is high.

Description

technical field [0001] The invention belongs to the field of engineering construction, and relates to pile foundation construction equipment applicable to large-diameter casings, in particular to a continuous rotary drilling device suitable for large-diameter casing construction. Background technique [0002] The full-pipe method is one of the hole-forming methods for pile foundations. It has the advantages of good hole-forming quality, high bearing capacity of a single pile, and no mud pollution in dry hole operations. It is especially suitable for hole-forming in geological conditions such as quicksand, silt, and underground rivers. Operation. Therefore, the application of the full casing method is becoming more and more extensive. [0003] At present, the construction equipment of the full-casing pipe method mostly adopts the rubbed pipe drilling rig. Though existing pipe rubbing rig has features such as simple in structure, easy to use, cheap. However, as the requirem...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a continuous rotary drilling device suitable for large-diameter casing construction, to solve the problems of small rubbing angle and low drilling efficiency of the pipe rubbing machine, and to realize continuous rotary drilling of large-diameter casing , to press the bushing into or out of the

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