An automatic drilling hydraulic control system, control method and work vehicle

Abstract

The invention discloses an automatic drilling hydraulic control system, a control method and a work vehicle. The automatic drilling hydraulic control system is provided with a first pressure sensor (1), a variation amplitude oil cylinder (2), a balance valve (3), an electric proportional relief valve (4), a second pressure sensor (5), a hydraulic motor (6), a hydraulic pump (7), load sensitive pressure compensation valves (8 and 9), a controller and an angle detector. The angle detector detects the pitch angle of a suspension arm, the pressure sensors detect pressure of a rodless cavity and a rod cavity of the variation amplitude oil cylinder (2), detected state data are input to the controller, the controller computes the current drilling pressure, and the buried depth of a drilling rod and compares drilling pressure corresponding to the preset buried depth with the current drilling pressure, the control instruction on the electric proportional relief valve (4) is sent to the controller according to the comparing result, the electric proportional relief valve (4) is operated according to the control instruction, and the current drilling pressure is equal to the drilling pressure corresponding to the preset buried depth.

Description

technical field [0001] The invention relates to an operation vehicle, in particular to an automatic drilling hydraulic control system of the operation vehicle and a control method thereof. Background technique [0002] CN202594665U discloses a multifunctional engineering vehicle, which has the functions of transportation, hoisting and drilling. Such as figure 1 As shown, the realization of the drilling function mainly includes the drill pipe and the drill bit, the hydraulic motor 6 for driving the drill pipe and the drill bit to rotate, the connecting plate, the push-pull cylinder and the luffing cylinder 2 . The position of the drill pipe and the adjustment of the angle between the drill pipe and the ground are determined by the push-pull oil cylinder on the cantilever, the luffing oil cylinder 2 of the cantilever and the placement position of the work vehicle. The drilling pressure is mainly determined by the luffing oil cylinder 2 . When this operating vehicle is drill...

AI Technical Summary

Problems solved by technology

When the drill pipe is manually controlled to run in, the following disadvantages are unavoidable: when the drilling speed is too fast, it is easy to cause system overload, resulting in system energy loss, high temperature, and damage to parts; when the drilling speed is too slow, the construction efficiency is low The intermittent nature of manual operation control also tends to reduce work efficiency and increase instability; factors such as human judgment errors or operation delays lead to damage to the working mechanism and increase the labor intensity of the operator.

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