The utility model relates to a combined starlike multi-purpose support seat, comprising a standpipe, a foot rack, an adjusting screw, a pipe clip, clipping sheets and a jack seat. 一种组合式星形多用支杆座,包括竖管、脚架、调节螺杆、管卡、夹片、插口座。
Oil-powered hydraulic truck jack Hydraulic pump is the power unit of the hydraulic puller ( hydraulic press, hydraulic pipe bender, hydraulic jack). 油压泵是油压拉出器(油压机、油压弯管机、油压千斤顶)的动力装置。
The research indicates that when the pull stress emerges on pipe section curve radius lies on the difference of jack displacement, while it is a little influenced by jacking force. 研究表明,当管身出现拉应力时,曲线半径R的决定因素是油缸行程差(b-c),而顶推力P对R的影响较小;
The Survey Control Adopted in the Project of Traversing the Yellow River by Pipe Jack at Zhengzhou 顶管穿越郑州黄河的测量控制
Application of planetary reductor in pipe jack 行星齿轮减速器在顶管掘进机中的应用
By setting up mechanical model, the relationship of curve radius, jacking force and effect factors such as pipe diameter, length of pipe section, thickness of wooden piece, elasticity of material and the difference of jack displacement is investigated. 通过建立力学模型对曲线路线半径R、顶推力P和影响因素如管径D、管节长L、木垫片厚a、材料弹性模量E以及工具管油缸行程差(b-c)等的关系进行推导。