| 摘要 |
1. A seismic cable junction comprising a) a casing composed of - an external cylindrical sleeve (90) which houses - two separable internal bodies (10, 50) each having an end head (11, 51) with a right circular cross-section, defining one of the respective ends of the casing each end head having a axial through-bore (26), an extension (12, 52), solid with the said end head and which extends, from this end head, towards the interior of the casing generally to one side of an axial plane of the casing, towards the end head of the other internal body, each extension having transverse structures (15, 17; 55, 57) adapted to come into engagement with analogous transverse structures of the extension of the other internal body, and each extension defining an axial connection support opposite the other extension b) axial tie-rods (38, 78) fixed respectively to the end heads for transmitting traction to the seismic cable, c) at least one male connection and one female connection (110-113) respectively fixed on the connection supports, opposite each other, the said connections having respective, generally radial, electrical contact elements, which are connected to a bundle of electric conductors passing through the axial bores in the end heads, characterised by the fact that - the tie-rods (38, 78) are anchored in an axial drilling in the respective end heads (11, 51) of the internal bodies (10, 50), - one at least of the end heads having in addition a peripheral abutment (13) which delimits a radial support surface (14) extending towards the outside of the sleeve, - the sleeve (90) comprises at least one part (91) provided with an internal peripheral abutment delimiting a radial support surface (92) extending towards the inside of the sleeve and adapted to directly supports against the said peripheral abutment of the end head (11) of one of the internal bodies (10), and the said part (91) of the sleeve being in addition adapted to engage by threading with a portion (101) of the casing axially connected to the end head (51) of the other internal body (50) for axially acting on the end heads (11, 51) the one towards the other, and avoiding application of any constraint on the extensions (12, 52) and connections provided on these, when towing force is exerted on the cable by the tie-rods (38), - the cross-section of the axial through-bore (26) provided in each end head (11, 51) is such that it permits passage of the connections connected to the bundle of associated electrical conductors, without dismounting of the tie-rods. |
