Xuzhou Xugong Foundation Construction Machinery Co., Ltd.

Yonghua Zhang

Jiguang Zhang

Zhonghai Zhang

Ming Li

Weixiang Lv

Zhigang Liu

Yu Sun

Hongchen Qiu

Li Zhang

Changmeng Shan

Xing Gao

Peng Wang

Xiafang Gao

Jinlong Lu

Junyun Shan

Changjian Qin

Qianbin Geng

A main winch system of a rotary drilling rig includes a main action loop, a pilot control loop, and a feedback control loop. The main action loop includes an engine, a hydraulic pump, a main control valve, a balance valve, a main winch motor, and an oil tank. The pilot control loop includes a pilot handle, a solenoid valve I, a pressure relay, and the main control valve in the main action loop. The feedback control loop includes a solenoid valve II and the hydraulic pump and the main control valve in the main action loop. In response to a lifting action of the pilot handle for the main winch, under the control of a button, the solenoid valve II is energized continuously, and the solenoid valve I is energized and de-energized according to a given rule.

Main hoist system of rotary drilling rig, and control method therefor

A push-pull force control method for a horizontal directional drilling machine with the following steps is provided. According to a correspondence relationship between a motor displacement and a maximum push-pull force of a drilling machine, the motor displacement is first adjusted, so that the required push-pull force can be obtained through the adjustment of the subsequent steps. Then, an oil feeding pressure of the motor is controlled according to a relationship between the push-pull force and the working pressure difference of the motor. Finally, the push-pull force of the motor is controlled in real time according to the oil feeding pressure of the motor to be equal to the required push-pull force value.

Push-pull force control method for horizontal directional drilling machine and horizontal directional drilling machine

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Xuzhou, China

Yonghua Zhang