F - Mech Eng,Light,Heat,Weapons – 28 – F
Patent
F - Mech Eng,Light,Heat,Weapons
28
F
257/26, 78/44, 2
F28F 7/00 (2006.01) B21D 39/06 (2006.01) B23K 20/08 (2006.01) F28F 9/16 (2006.01)
Patent
CA 1217764
ABSTRACT OF THE DISCLOSURE an exterior surface portion or a metal tube (30) is bonded to a surface portion or a bore (11) in a metal tubesheet (10) by detonating an explosive bonding charge (31) inside the tube (30) adjacent a front face (13) of the tubesheet (10). The bonding charge (31) consists of nitroguanidine, and is contained within a polypropylene container comprising a cup structure (21) and a header structure (22). The cup structure (21) forms a receptacle for the bonding charge (31), and positions the bonding charge (31) at the proper depth within the tube (30) to achieve the desired bonding effect. The header structure (22) overlies and shapes the bonding charge (31), and contains a transfer charge (44) and a firing charge (43) for initiating detonation of the bonding charge (31). A firing assembly for initiating detonations of firing charges (45) in tubes (30) arranged in a plurality of linear arrays comprises a corre- sponding plurality of firing rails (24) and an initiation rail (27). Each firing rail (24) is secured to the header structures (22) of a corresponding linear array of bonding charge containers, so that a linear charge (25) secured to the firing rail (24) can initiate detonation in sequence of the individual firing charges (25) of the corresponding linear array. An initiation rail (27) crosses each of the firing rails (24), so that a linear initiatin charge (25) secured to the initiation rail (27) can detonate each of the linear charges (25) on the various firing rails (24) in sequence.
418195
Baird Richard H.
Blechar Theodore J.
Giladett Leo V.b.
Horner Reginald M.
Prouty Gerald G.
Electric Power Research Institute
Smart & Biggar
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