Friction fit spigot and socket joint for flexible pipes - has axial ties between socket collar and double ring keyed to spigot barrel by socket end

摘要

The tensioned barrel strap (20) has ties (23) to a composite locking ring to reinforce a friction fit spigot (10) and socket (4) joint for flexible pipes. The spigot barrel has circumferential shark's tooth section ribs (2) resisting extraction. This prevents joint separation should the socket expand during operation. The strap (20) is doubled about the socket (4) barrel to accommodate the hooked ends (25,26) of eyelet ties (23) parallel to the longitudinal pipe axis. The strap (26) remote end of a tie passes round a check ring (21) of which the internal dia. nominally exceeds that of the spigot (10) barrel. A locking ring (22) is wedged between the check ring (21) and the socket (4) end. The ring (21) catches against the shoulder of the last rib (2). Alternatively doubly hooked ties are retained by two straps at a definite interval. A ring (21) bore notch (24) may accommodate the tie (23) eyelet.