CORROSION PREVENTION DEVICE AND CORROSION PREVENTION METHOD FOR CUT SURFACES OF PIPE

Title:

CORROSION PREVENTION DEVICE AND CORROSION PREVENTION METHOD FOR CUT SURFACES OF PIPE

Document Type and Number:

WIPO Patent Application WO/2016/163515

Kind Code:

A1

Abstract:

This corrosion prevention device for cut surfaces of a pipe is equipped with a nested double cylinder body 2 which is housed in an outer case 1 that is mounted so as to surround the outer peripheral surface of a water pipe K, the nested double cylinder body 2 being disposed from above the gap between a pair of cut surfaces 10 of the pipe formed by full cutting of the water pipe K. The double cylinder body 2 has: a corrosion prevention body 3 facing the pair of cut surfaces 10 of the pipe; and a core body 4 inserted into the corrosion prevention body 3 from above. The double cylinder body 2 is configured so that the insertion of the core body 4 into the corrosion prevention body 3 causes the corrosion prevention body 3 to expand, in diameter, to press contact with the pair of cut surfaces 10 of the pipe. The corrosion prevention body 3 comprises: a through hole 31 which communicates with the water pipe K; and a flange portion 35 which is located above the through hole 31 and overhangs outward. The flange portion 35 has an abutting surface which abuts on the outer peripheral surface of the water pipe K, the abutting surface being curved along the outer peripheral surface of the water pipe K.

Inventors:

KUWAGAKI DAISUKE (JP)

Application Number:

PCT/JP2016/061538

Publication Date:

October 13, 2016

Filing Date:

April 08, 2016

Export Citation:

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Assignee:

WATERWORKS TECH DEV ORGANIZATION CO LTD (JP)

International Classes:

F16L57/00; F16K43/00; F16L41/06; F16L55/00

Foreign References:

JP2015045373A	2015-03-12
JP2013185682A	2013-09-19
JP2012021597A	2012-02-02
JP2009008120A	2009-01-15

Other References: