Patent ID: 6022507
Filing Date: 2000-02-08
Classification: C21C

Abstract:
A blowing lance changing device, comprising:a blowing lance;a coupling head including a receptacle into which an end of the blowing lance can be introduced, the receptacle including connections for coolant supply, coolant discharge and blowing fluid supply;the blowing lance including a blowing tube and a cooling jacket through which coolant can flow and which encloses the blowing tube, the cooling jacket including an inlet and outlet disposed at the end of the blowing lance associated with the receptacle of the coupling head;the blowing lance being releasably coupleable to the coupling head, at least the inlet or the outlet of the cooling jacket emerging at a particular peripheral surface location of the blowing lance, an associated one of the connections for coolant supply and coolant discharge corresponding to the inlet or the outlet, respectively, being disposed on a lateral surface on the receptacle corresponding to the particular peripheral surface location;the receptacle including a tubular attachment for connection to the blowing fluid supply and with which the blowing tube is connected interengaging and hermetically when the blowing lance is introduced into the receptacle of the coupling head; andstructure defining at least one chamber between the receptacle and the blowing lance when the end of the blowing lance is introduced into the receptacle of the coupling head, said at least one chamber being formed in a zone corresponding respectively to at least one of the connections of the receptacle for the coolant supply and the coolant discharge.