Shaft drilling device专利检索- .钻铤专利检索查询-专利查询网

Shaft drilling device
申请号	JP41597290	申请日	1990-12-28	公开(公告)号	JPH04136394A	公开(公告)日	1992-05-11
申请人	Inco Ltd;			发明人	KAAKU MAKUBURAIDO SHINKUREA; JIYON RICHIYAADO INGURANDO;
摘要	PURPOSE: To remove chips with a dry method by providing two air compressors and a dust collector to a shaft drilling device constituted of a bottom drill assembly body consisting of a cutterhead and weights in a detachable manner, a swivel joint and a stabilizer. CONSTITUTION: A drilling device 10 is constituted of a bottom drill assembly body 28, a swivel joint 26, a drill string 20 and a stabilizer 34. The bottom drill assembly body 28 is constituted of a cutterhead 12, a plenum 14 and a plurality of weights 16 in a detachable manner. A first compressor 36 is provided to the drilling device, compressed air thereof pushes down the cutterhead 12 through the drill string 20, and a riser pipe 18 is made in a state of vacuum by a second compressor through a dust collector 40 to absorb cuttings. By the constitution, the cuttings are stirred with an air nozzle 42, and the cuttings can be removed to the dust collector 40 in a state of vacuum from an inlet 52 through the riser pipe 18 and an outside bore 58. COPYRIGHT: (C)1992,JPO
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