Xuzhou Xugong Foundation Construction Machinery Co., Ltd.

China University of Mining and Technology

Xuzhou Xugong Energy Equipment Co., Ltd

Jiguang Zhang

Zhonghai Zhang

Jixiong Zhang

Meng Li

Dan Ma

Xuefeng Gao

Ming Li

Qiang Li

Wentao Hou

Weixiang Lv

Yonghua Zhang

Yu Sun

Caifeng Wei

Jingwei He

Yong Liu

Qiang Cao

Xiaoliang Li

Peng Wang

Xiaobao Luo

Li Zhang

Ju Luo

Changjian Qin

Jinlong Lu

Qiangsheng Fan

Bin Qu

Haigang Zhu

Disclosed a method, a system, a device, and a medium for determining load-bearing deformation of solid waste materials. The method includes: obtaining a bulk sample of solid waste material, sieving the sample to obtain multiple particle sizes, and measuring the mass of each particle size before the experiment; performing a compaction experiment on the bulk sample to obtain a stress-strain relationship curve, and calculating a slope of a linear part; sieving the bulk sample after the compaction experiment to obtain multiple particle sizes, and measuring a mass of each particle size; plotting a mass ratio diagram before and after the experiment, and calculating a relative breakage rate Band a measured fractal dimension; constructing a macroscopic strain relationship equation, substituting the measured fractal dimension into the equation to obtain a macroscopic strain, and thereby determining load-bearing deformation degree of the solid waste materials.

Method for determining load-bearing deformation of solid waste materials and system and device and medium thereof

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

A detachable and combined drive key of a power head of a rotary drilling rig is provided. The drive key includes torque transfer keys and a pressure transfer key. Each torque transfer key is respectively assembled on a key groove on an inner wall of the drive sleeve. The pressure transfer key is assembled at a bottom of a drive sleeve and includes a circular ring structure and a plurality of pressure pads. Each pressure pad has a width less than the torque transfer key. A central surface of each pressure pad is aligned with a central surface of each torque transfer key. The drive sleeve, the torque transfer keys, and the pressure transfer key are combined to form an integrated drive key with a same circular cross-section.

Detachable combined-type drive key for rotary drilling rig power head

Growing community of inventors

Xuzhou, China

Jiguang Zhang