Repair joint device and method of assembling the same
AssigneeThe Victaulic Company of Japan Limited
InventorsShinichi Asada, Masao Naito
Life of this patent
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Abstract
A repair joint device capable of joining by welding divided housings and of facilitating the welding operation; and includes a plurality of circumferentially divided housings, wherein each divided housing has a divided sleeve, a pair of end plates provided on both end portions of the divided sleeve, and a seal accommodation projection provided on each end plate. A projection-free area is formed between the seal accommodation projections. An auxiliary projection device is provided on the projection-free area.
Claims10
A repair joint device comprising:
- a plurality of circumferentially divided housings configured to surround a pipe, the divided housings being configured to be joined to each other by welding through a joint surface, wherein:
- each divided housing comprises (i) a divided sleeve configured to partially surround the pipe, (ii) end plates provided respectively at axial end portions of the divided sleeve, and (iii) circumferentially extending seal accommodation projections provided respectively on axially outer surfaces of the end plates to form respective seal accommodation spaces between the seal accommodation projections and the pipe;
- each seal accommodation projection does not extend to the joint surface;
- projection-free areas are formed between the seal accommodation projections of one of the divided housings and the seal accommodation projections of another of the divided housings;
- and
- an auxiliary projection device is removably provided at each of the projection-free areas, the auxiliary projection devices forming additional seal accommodation spaces between the auxiliary projection devices and the pipe.
A method of assembling a repair joint device comprising a plurality of circumferentially divided housings configured to surround a pipe, the divided housings being configured to be joined to each other by welding through a joint surface, each divided housing comprising:
- (i) a divided sleeve configured to partially surround the pipe, (ii) end plates provided respectively at axial end portions of the divided sleeve, and (iii) circumferentially extending seal accommodation projections provided respectively on axially outer surfaces of the end plates to form respective seal accommodation spaces between the seal accommodation projections and the pipe, wherein the seal accommodation projections of each divided housing do not extend to the joint surface, the method comprising:
- installing each divided housing around the pipe, wherein a projection-free area is formed between the seal accommodation projections of one of the divided housings and the seal accommodation projections of another of the divided housings;
- joining the pair of divided housings by welding through the joint surface;
- removing a weld surplus remaining on the joint surface of the pair of divided housings;
- and
- inserting an auxiliary projection device at each projection-free area, the auxiliary projection devices forming additional seal accommodation spaces between the auxiliary projection devices and the pipe.
Dependencies are inferred from the claim text.