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Title:
PIPE INNER FACE GRINDING METHOD AND RELATED EQUIPMENT
Document Type and Number:
Japanese Patent JP3853240
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To obtain a pipe inner face grinding equipment capable of generating constantly uniform and stabilized grinding pressure in accordance with minor irregularities of a lining surface that cannot be completely eliminated by means of large-diameter grinding tools use for the entire length of pipes, such as minor ups and downs in the surface close to both ends of mortar lining applied to the internal face of a cast iron pipe.
SOLUTION: As a grinding unit horizontally supported by a roller R and revolved to conduct grinding while being inserted into a cast iron pipe P, the equipment is composed as follows: A grinding tool 1 having a grinding stone 1b, attached to the tip of its horizontal rotation axis 1a, is fitted to a horizontal support member 3, consisting of an L-shaped support frame which is attached to a slider 2a of a guidance mechanism designed to conduct upward and downward guidance; the other end of the horizontal support member 3 is supported by a repulsion cylinder 5; these members are composed on a transfer table 6; a pressure reducing valve is formed in a pipe system designed to provide compressed air to the repulsion cylinder 5, and a pressure above a specified level is adjusted by discharging the incremental portion of the pressure through the pressure reducing valve; and it is made possible to carry out grinding of minor surface irregularities, using a grinding stone 1b that can perform sufficient grinding of small ups and downs of the grinding target surface.


Inventors:
吉永 泰治
広岡 明義
奈須 博文
霜村 潤
藤本 裕人
Application Number:
JP2002000085802
Publication Date:
December 06, 2006
Filing Date:
March 26, 2002
Export Citation:
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Assignee:
株式会社栗本鐵工所
International Classes:
B24B5/40; (IPC1-7): B24B5/40
Domestic Patent References:
JP7100746A
JP11262846A
JP7223157A
JP6079602A
JP2000066919A
Attorney, Agent or Firm:
鎌田 文二
東尾 正博
鳥居 和久



 
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