Deslagging device and rotary drilling rig

Abstract

The invention discloses a deslagging device and a rotary drilling rig. The deslagging device comprises an inner pipe, a first outer pipe, an upper deslagging pipe, a lower deslagging pipe and a slag suction pump. The inner pipe is sleeved with the first outer pipe, and the inner pipe is driven by a drill rod of the rotary drilling rig to rotate. The first outer pipe is provided with an outer deslagging hole through which the upper deslagging pipe penetrates. One end of the upper deslagging pipe extends into the first outer pipe through the outer deslagging hole, and the other end of the upper deslagging pipe is connected with the slag suction pump. The inner pipe is provided with an upper deslagging hole opposite to the outer deslagging hole and a lower deslagging hole through which the lower deslagging pipe penetrates. One end of the lower deslagging pipe extends into the inner pipe through the lower deslagging hole, and the other end of the lower deslagging pipe is used for being connected with a drilling tool of the rotary drilling rig. By means of the deslagging device, the probability of secondary crushing of boring mud can be reduced, the boring mud can be prevented from adhering to teeth, the rate of breaking native rock or soil layers is improved, a drill bit and the drill teeth are protected, in addition, the number of times of lifting boring mud in the construction process of the rotary drilling rig can be reduced, and the drilling efficiency is improved.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a slag discharge device and a rotary drilling rig. Background technique [0002] Rotary drilling rig is a construction machine for taking soil and forming holes for cast-in-place piles. It has the advantages of stable power transmission and high efficiency. It is widely used in various foundation constructions such as cast-in-place piles, continuous walls, and foundation reinforcement. The rotary drilling rig is mainly composed of a chassis and a working device. The chassis includes a traveling mechanism, an underframe and a car slewing system. Working devices usually include luffing mechanism, mast assembly, main winch, auxiliary winch, power head, drill pipe and drilling tools, etc. [0003] The process of drilling a hole with a rotary drilling rig is roughly as follows: the drilling tool (such as a rotary bucket) reaches the pile position through the traveling mechanism o...

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Problems solved by technology

[0004] The defect of existing rotary drilling rigs is that: during the drilling process, the primary rock layer or soil layer is broken into drilling slag by the drill bit, and some brick slag will inevitably stay near the drill bit. The secondary crushing of drilling slag affects the drilling efficiency of the original rock or soil layer and accelerates tooth wear; The crushing efficiency of the soil layer

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