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1. 发明授权

US4653731A Device in cutting torches 失效
标题翻译：割炬装置
公开(公告)号：US4653731A
公开(公告)日：1987-03-31
申请号：US830310
申请日：1986-02-14
申请人： Gert Broden , Goran Haapanen
发明人： Gert Broden , Goran Haapanen
IPC分类号： F23D14/42 , B23K7/00
CPC分类号： F23D14/54 , F23D14/42
摘要： A device in a cutting torch which comprises a torch body with a valve housing and a nozzle and with a cutting oxygen duct, a heating oxygen duct and a combustion gas duct disposed in the torch, there being disposed in the torch a connection line which contains a throttling member between the heating oxygen duct and the cutting oxygen duct and wherein disposed in the cutting oxygen duct before the connection line is a valve member which permits a flow of heating oxygen to pass through the cutting oxygen duct only in the direction towards the orifice of the nozzle.The connection line between the heating oxygen duct and the cutting oxygen duct comprises at least one cooling oxygen duct (7) disposed in the nozzle which is elaborated with three sealing surfaces towards the torch body. The cooling oxygen duct (7) has a diameter which is so adapted in relation to the orifice diameter in the cutting oxygen duct of the nozzle and to the size of the heating flame that during heating of the workpiece a cooling oxygen pressure is rapidly built up in the cooling oxygen duct which prevents hot combustion gases from penetrating into the cutting oxygen ducts and that in the case of short nozzle distances to the workpiece the flow of cooling oxygen is prevented from becoming so great that the surface of the workpiece which is situated below the orifice of the cutting oxygen duct is cooled so rapidly that hole-piercing is rendered more difficult.
摘要翻译：一种切割炬中的装置，其包括具有阀壳体和喷嘴的割炬本体，并具有切割氧气管道，加热氧气管道和设置在炬管中的燃烧气体管道，其中设置有连接线，该连接线路包含在加热氧气管道和切割氧气管道之间的节流构件，并且其中在连接线路之前设置在切割氧气管道中的是阀构件，阀构件仅允许加热氧气在朝向孔口的方向上通过切割氧气管道的喷嘴。加热氧气管道和切割氧气管道之间的连接线包括设置在喷嘴中的至少一个冷却氧气管道（7），该冷却氧气管道（7）被精加工成具有朝向割炬本体的三个密封表面。冷却氧气管道（7）的直径相对于喷嘴的切割氧气管道中的孔口直径以及加热火焰的大小，在加热工件期间，冷却氧气压力迅速建立在冷却氧气管道中，其防止热燃烧气体渗透到切割氧气管道中，并且在与工件的喷嘴距离短的情况下，防止冷却氧气流变得如此大，使得位于下方的工件的表面切割氧气管的孔口被如此快速地冷却，使得穿孔更加困难。

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