Waterworks Technology Development Organization Co., Ltd.

Daisuke Kuwagaki

Gou Horikawa

The branch pipe forming apparatusincludes a first split memberand a second split member, which include split surfacesandalong a plane including an axial center X of the existing pipe W and an axial center Y of a branch pipe, and which are connected to each other in a sealed state by a fastening member B. An axial center Z of a tube partis located closer to the branch pipethan to the outer circumferential surface of an existing pipe W in a cutter accommodation space Sp. The first split memberand the second split memberare coupled to each other at respective coupling portions with respective coupling openings opposite to each other across the drilled hole Wa and the cutter accommodation space Sp and holding therebetween an end portionA of the branch pipein a sealed state.

Branch pipe forming apparatus, lid doubling as valve element, branch pipe forming apparatus with lid doubling as valve element, and branch pipe formation method

A split T-shaped pipe serving as a housing device and comprising: an annular case body that has a split part in at least one location in the circumferential direction, and that surrounds the outer circumferential surface of a water pipe in a sealed state with a seal material therebetween; and fasteners for tightening the split part, thereby joining a plurality of split pieces constituting the case body. Joining surfaces are provided at the circumferential end portions of the split pieces, and protrusions protruding along the circumferential direction are formed on the joining surfaces but only at both end portions of the case body in the pipe axis direction of the water pipe.

Housing device and method for mounting housing device

An apparatus includes a telescopic double tubular member accommodated in an outer case that is mounted so as to surround an outer circumferential surface of a water pipe, and placed between a pair of cut faces. The double tubular member includes an anti-corrosion member that faces the pair of cut faces and a core member, and is configured such that the anti-corrosion member is radially expanded by the core member, so as to be pressed against the pair of cut faces. The anti-corrosion member has a through hole that communicates with the water pipe, and a flange positioned above the through hole and extending radially outward. The flange has an abutment surface that abuts an outer circumferential surface of the water pipe, and this abutment surface is curved along the outer circumferential surface of the water pipe.

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Osaka, Japan

Daisuke Kuwagaki