公开(公告)号：US5298835A

公开(公告)日：1994-03-29

申请号：US946819

申请日：1992-09-16

申请人： Erich Muehlberger ,  Stephan E. Meuhlberger ,  Albert Sickinger ,  Don E. Bailey ,  Masamichi Koga ,  Koichi Takeda ,  Tsuyoshi Shinoda

发明人： Erich Muehlberger ,  Stephan E. Meuhlberger ,  Albert Sickinger ,  Don E. Bailey ,  Masamichi Koga ,  Koichi Takeda ,  Tsuyoshi Shinoda

IPC分类号： C23C4/12 ,  H05H1/28 ,  H05H1/44 ,  H01J7/24

CPC分类号： H05H1/28 ,  C23C4/137 ,  H05H1/44

摘要： A supersonic plasma system in which a vacuum source creates a low static pressure environment within an enclosure containing a plasma gun and a workpiece has plural cathodes of sealed, modular construction in conjunction with a common anode, to provide higher levels of operating power and other advantages which flow from a segmented cathode gun configuration. Inert gas independently introduced into the plural cathodes undergoes swirling motion over the cathode tips. The anode is of modular construction for easy replacement in order to change the configuration of a nozzle, a plurality of arc chambers receiving the plural cathodes or a central mixing chamber between the nozzle and the arc chambers within the anode and coupled to a central powder feed. The powder feed includes a replaceable insert which includes at least one and preferably a plurality of powder feed ports into the various arc chambers. Alternatively, metal which has already been heated to a molten state can be fed directly into the central mixing chamber. The modular cathodes which are independently powered by separate D.C. power sources are also independently cooled by separate cooling water systems as is the common anode. The cooling systems are configured to produce swirling of the cooling water so that cooling action is maximized.

摘要翻译： 一种超音速等离子体系统，其中真空源在包含等离子体枪和工件的外壳内形成低静态环境，具有多个与公共阳极结合的具有密封模块化结构的阴极，以提供更高水平的操作功率和其它优点 其从分段阴极枪配置流出。 独立地引入多个阴极的惰性气体在阴极尖端上经历旋转运动。 阳极是模块化结构，以便于更换，以改变喷嘴的构造，容纳多个阴极的多个电弧室或在喷嘴和阳极之间的电弧室之间的中心混合室，并且耦合到中心粉末进料 。 粉末进料包括可替换的插入物，其包括至少一个并且优选多个进入各种电弧室的粉末进料口。 或者，已经被加热到熔融状态的金属可以直接进料到中央混合室中。 由独立的直流电源独立供电的模块化阴极也通过单独的冷却水系统独立地冷却，如公共阳极。 冷却系统被配置为产生冷却水的旋转，使得冷却动作最大化。

公开(公告)号：US4958057A

公开(公告)日：1990-09-18

申请号：US340188

申请日：1989-04-19

申请人： Hiroshi Shiraishi ,  Nobuo Tajima ,  Tsuyoshi Shinoda ,  Nobuyoshi Hirotsu

发明人： Hiroshi Shiraishi ,  Nobuo Tajima ,  Tsuyoshi Shinoda ,  Nobuyoshi Hirotsu

IPC分类号： H05H1/32 ,  B22D11/10 ,  H05H1/28 ,  H05H1/34

CPC分类号： H05H1/34 ,  H05H1/28 ,  H05H2001/3421 ,  H05H2001/3436 ,  H05H2001/3478

摘要： A transfer-type plasma torch may be used to heat objects, for example, to heat molten steel at a certain stage of being supplied from a converter to a continuous casting mold. After a trigger electric discharge has been produced between the cathode and the ignition anode of the plasma torch, an electric discharge is effected between the cathode and an object to be treated that is set as the anode. The plasma torch includes a cylindrical cathode-holding member having therein a space allowing for the flow of coolant, an ignition anode disposed within the cathode-holding member, and a ring-shaped cathode disposed on an inner periphery of the cathode-holding member and positioned below the tip of the ignition anode, with the tip portion of the cathode projecting downwardly from the bottom face of the cathode-holding member. This arrangement eliminates a conventional nozzle, thereby allowing for a reduction in a diameter of the entire torch while enabling a relative increase in the diameter of the cathode. Thus, the plasma torch exhibits a large capacity for arc current.