双壁套管与机械式冲击抓斗的设计

Design of Double Wall Casings and Mechanical Percussive Grab

冲击抓斗和套管的合理设计与选用 ,直接关系到全套管冲抓成孔设备的工作效能和经济效益。介绍了双壁套管与机械式冲击抓斗的工作原理、结构特点和设计要点。

It is directly relative to the work performances and economy of full casing boring with grab equipment that the percussive grab and casings are reasonable designed and selected. The working principles, structural specialty and main design points of percussive grab and double wall casing are introduced in the paper.