Rotary drilling rig and hydraulic control system thereof

Abstract

The invention discloses a hydraulic control system used for driving an upper vehicle platform of a rotary drilling rig to rotate. The hydraulic control system comprises a first proportional pressure reducing valve, a position detection device and a controller, wherein the first proportional pressure reducing valve is arranged in a rotation oil way of the hydraulic control system; the position detection device can detect the angle change of the upper vehicle platform and send out an angle signal; the controller can receive the angle signal and control the opening degree of the first proportional pressure reducing valve according to the angle signal. According to the hydraulic control system, the controller, the position detection device and the first proportional pressure reducing valve work in a cooperated mode, so that the purpose of automatic alignment of a drill rod and the center of a hole is achieved after rotation, manual hole alignment operation is not needed any longer, and the hole drilling efficiency and the hole drilling quality are improved. The invention further provides the rotary drilling rig with the hydraulic control system.

Description

technical field [0001] The present invention relates to the technical field of engineering machinery, in particular to a hydraulic control system, and also relates to a rotary drilling rig with the hydraulic control system. Background technique [0002] Rotary drilling rig is a construction machine suitable for hole-forming operations in building foundation engineering. It is mainly suitable for the construction of sandy soil, cohesive soil, silty soil and other soil layers, and is widely used in various foundation constructions such as cast-in-situ piles and foundation reinforcement. [0003] The rotary drilling rig mainly includes a crawler chassis and a rotatable boarding platform arranged on the chassis, and a drill pipe is installed on the boarding platform. When the rotary drilling rig uses the drill rod to drill holes on the ground, it is necessary to remove the drill rod from the drill hole every once in a while, and drive the drill rod to leave the drilling positio...

AI Technical Summary

Problems solved by technology

In the prior art, the operation of aligning the rotated drill rod with the center of the hole is that the operator observes the position of the drill rod with the naked eye, and moves the rotary handle left and right to fine-tune the action so that the drill rod is placed in the center of the hole. This operation not only seriously affects the construction efficiency, but also seriously affects the drilling quality because of the low accuracy of manual hole alignment.

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