Control method and device of rotary drilling rig and rotary drilling rig

Abstract

The invention relates to the field of engineering machinery, discloses a control method and device of a rotary drilling rig and the rotary drilling rig, and solves the problems that the rotary drilling rig is easy to drill when an operation medium changes and a proper power output gear is matched by depending on the experience of an operator in the prior art. The method comprises the following steps: acquiring a real-time rotating speed of a power head or a drill rod of the rotary drilling rig; judging whether the real-time rotating speed is changed into a preset critical rotating speed or not; and when detecting that the real-time rotating speed is changed into the preset critical rotating speed, adjusting the output of the torque of the power head or the pressure of an oil cylinder of the rotary drilling rig according to a gear corresponding relation between the preset critical rotating speed and a torque output value of the power head or a gear of a preset pressure output value of the oil cylinder so as to match the drilling of the current operation medium. The embodiment of the invention is suitable for the drilling process of the rotary drilling rig.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a control method and device for a rotary drilling rig and the rotary drilling rig. Background technique [0002] During the drilling process of rotary drilling rigs, the geological conditions often change, from soft soil to hard rock, and the strength of the working medium varies widely. In the prior art, the torque output of the power head of the rotary drilling rig can be adaptively adjusted according to the change of the load, and matched with the appropriate power of the main engine. When the drilling geology is soft soil or sandy soil, because the strength of the working medium is not strong, the load adaptive matching will not cause drastic changes in the torque and speed of the power head, and can drill smoothly. However, when the drilling geology changes from soft soil to hard rock or the type of rock to be drilled changes, the strength of the working medium will cha...

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Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a control method and device for a rotary drilling rig and a rotary drilling rig, which solves the problem that the rotary drilling rig in the prior art is prone to sticking when faced with changes in the working medium and relies on the experience of the operator The problem of matching the appropriate power output gear, when the real-time speed of the power head or drill pipe changes to the preset critical speed, according to

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