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Patent Searching and Data


Title:
MACHINE TYPE CUTTING DEVICE FOR UNDERWATER ENVIRONMENT AND MACHINE TYPE CUTTING METHOD FOR UNDERWATER ENVIRONMENT
Document Type and Number:
Japanese Patent JP2013141723
Kind Code:
A
Abstract:

To provide a small sized and lightweight machine type cutting device for an underwater environment usable in an underwater environment such as the maintenance work of a nuclear power plant, or in a narrow portion in the underwater environment by further reducing resistance received from the water of a machining blade.

The surface shape of a rotary disk of a machining blade is designed so as to further reduce resistance received from the water of the machining blade, or a mechanism is provided in which the water resistance is reduced. For example, a surface of the rotary disk is subjected to dimpling, or a cover subjected to dimpling is provided at the surface of the rotary disk. Alternately, a surfactant is applied to the dimpled rotary disk surface or the dimpled cover surface, or a part of the machining blade is surrounded with a casing, and gas is supplied into the casing to partially form a gaseous environment. Furthermore, a part of the machining blade is surrounded with the casing, and a water flow or a water flow containing fine air bubbles is applied in the rotation direction of the rotary disk to assist rotation.


Inventors:
Hosono, Yasuharu
Nomura, Taiyoku
Sugano, Akihiro
Kurosawa, Koichi
Motoki, Tomohiko
Application Number:
JP2012000003046
Publication Date:
July 22, 2013
Filing Date:
January 11, 2012
Export Citation:
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Assignee:
HITACHI-GE NUCLEAR ENERGY LTD
International Classes:
B23D45/00; B23D61/02; B24B27/06; B24D5/12; G21C19/02; G21F9/30
Attorney, Agent or Firm:
Polaire Intellectual Property Corporation