Main winch system and control method of a rotary drilling rig

Abstract

A main winch system of a rotary drilling rig and a control method thereof, comprising a main action loop, a pilot control loop and a feedback control loop, the main action loop including an engine, a hydraulic pump, a main control valve, a balance valve, a main winch motor and The fuel tank, the pilot control circuit includes the pilot handle, solenoid valve I, pressure relay and the main control valve in the main action circuit, and the feedback control circuit includes the hydraulic pump and the main control valve connected to the solenoid valve II and the main action circuit. When the pilot handle performs the lifting action of the main winch, the solenoid valve II is continuously energized through the button control, and the solenoid valve I is energized and de-energized according to the established rules, so that the main winch can shake up and down according to certain rules, and the drill can be easily moved. Shake off the clay attached to the tool to improve construction efficiency.

Description

technical field [0001] The invention belongs to the field of engineering machinery, in particular to a main winch system of a rotary drilling rig and a control method thereof. Background technique [0002] A rotary drilling rig is a pile machine used for hole-forming operations. At the end of each working cycle, the soil in the drilling tool needs to be poured out, but the clay attached to the inner wall of the drilling tool will not fall off by itself, and often needs to go back and forth. Shake the drill to shake it off. [0003] Generally, the operator will choose two methods to shake off the clay: 1. Quickly forward and reverse the power head back and forth, using the rotational inertia of the drill pipe to shake off the soil by the back and forth collision between the power head and the drill pipe; 2. Shake the main winch back and forth quickly, use the vibration of the drill pipe's own spring, and shake off the soil by the back and forth collision between the drill pi...

AI Technical Summary

Problems solved by technology

Therefore, it is entirely up to the operator to master the operating frequency of the pilot handle, and it is difficult to ensure that the frequency and amplitude of shaking the soil are the same every time through manual operation, often failing to achieve a good effect of shaking the soil

[0005] Simultaneously, another shortcoming of the second method of shaking soil is that: in the manual soil shaking process, the main control valve will change back and forth from opening to closing, and the displacement of the hydraulic pump will change back and forth accordingly, making the main winch The response speed of the action is affected. When operating the handle, you will feel that the response of the main winch is slow and there is a certain lag, which makes the effect of shaking the soil unsatisfactory.

Images