Existing pipe cut-off method, existing pipe slitting method,...

Details Existing pipe cut-off method, existing pipe slitting method,... Existing pipe cut-off method, existing pipe slitting method,...

F - Mech Eng,Light,Heat,Weapons

16

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F16L 55/18 (2006.01) B23D 21/00 (2006.01) E03B 7/07 (2006.01) E03F 7/00 (2006.01) F16L 55/07 (2006.01) F16L 55/105 (2006.01)

Patent

CA 2254656

The invention relates to an existing pipe cut-off method and slitting method, by which an existing pipe made of cast iron and steel can be cut off. With a cut-off method according to the invention, first, a part of an existing pipe 1 is enclosed and sealed up by a seal-up housing 2 in an airtight state, a cutting tool 30 having a plurality of blades 30c is accommodated in the corresponding seal-up housing in a state the cutting tool is attached to the abovementioned seal-up housing 2. Next, the cutting tool 30 is fed toward the center of the abovementioned existing pipe 1 while slitting the existing pipe 1 by rotating the cutting tool 30 by power of a prime mover, and the abovementioned existing pipe 1 is cut off by the cutting tool 30 by turning the abovementioned seal-up housing 2 in the circumferential direction R of the existing pipe 1.

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