公开(公告)号：EP3314989A1

公开(公告)日：2018-05-02

申请号：EP16816883.9

申请日：2016-06-27

申请人： Tekna Plasma Systems Inc.

发明人： BOULOS, Maher I. ,  JUREWICZ, Jerzy W. ,  DIGNARD, Nicolas ,  AUGER, Alexandre ,  THELLEND, Sébastien

IPC分类号： H05H1/26

摘要： An induction plasma torch comprises a tubular torch body, a tubular insert, a plasma confinement tube and an annular channel. The tubular torch body has upstream and downstream sections defining respective inner surfaces. The tubular insert is mounted to the inner surface of the downstream section of the tubular torch body. The plasma confinement tube is disposed in the tubular torch body, coaxial therewith. The plasma confinement tube has a tubular wall having a thickness tapering off in an axial direction of plasma flow. The annular channel is defined between, on one hand, the inner surface of the upstream section of the tubular torch body and an inner surface of the insert and, on the other hand, an outer surface of the tubular wall of the plasma confinement tube. The cooling channel carries a fluid for cooling the plasma confinement tube.

公开(公告)号：EP3314989B1

公开(公告)日：2020-05-27

申请号：EP16816883.9

申请日：2016-06-27

申请人： Tekna Plasma Systems Inc.

发明人： BOULOS, Maher I. ,  JUREWICZ, Jerzy W. ,  DIGNARD, Nicolas ,  AUGER, Alexandre ,  THELLEND, Sébastien

IPC分类号： H05H1/30 ,  H05H1/28

公开(公告)号：EP2671430B1

公开(公告)日：2018-05-16

申请号：EP12742194.9

申请日：2012-02-02

申请人： Tekna Plasma Systems Inc.

发明人： BOULOS, Maher, I. ,  DIGNARD, Nicolas ,  AUGER, Alexandre ,  JUREWICZ, Jerzy ,  THELLEND, Sébastien

IPC分类号： H05H1/26 ,  H05H1/28 ,  H05H1/30

CPC分类号： H05H1/30 ,  H05H1/26 ,  H05H1/28

摘要： A plasma confinement tube for use in an induction plasma torch is disclosed. The plasma confinement tube defines a geometrical axis and an outer surface. The plasma confinement tube includes a capacitive shield comprising a film of conductive material applied to the outer surface of the plasma confinement tube and segmented into axial strips. The axial strips are interconnected at one end. Axial grooves are machined in the outer surface of the plasma confinement tube, and interposed between the axial strips. The conductive film may have a thickness smaller than a skin-depth calculated for a frequency of operation of the induction plasma torch and an electrical conductivity of the conductive material of the film.

公开(公告)号：EP2671430A1

公开(公告)日：2013-12-11

申请号：EP12742194.9

申请日：2012-02-02

申请人： Tekna Plasma Systems Inc.

发明人： BOULOS, Maher, I. ,  DIGNARD, Nicolas ,  AUGER, Alexandre ,  JUREWICZ, Jerzy ,  THELLEND, Sébastien

IPC分类号： H05H1/30 ,  H05H1/28

CPC分类号： H05H1/30 ,  H05H1/26 ,  H05H1/28

摘要： An induction plasma torch comprises a tubular torch body, a plasma confinement tube disposed in the tubular torch body coaxial therewith, a gas distributor head disposed at one end of the plasma confinement tube and structured to supply at least one gaseous substance into the plasma confinement tube; an inductive coupling member for applying energy to the gaseous substance to produce and sustain plasma in the plasma confinement tube, and a capacitive shield including a film of conductive material applied to the outer surface of the plasma confinement tube or the inner surface of the tubular torch body. The film of conductive material is segmented into axial strips interconnected at one end. The film of conductive material has a thickness smaller than a skin-depth calculated for a frequency of a current supplied to the inductive coupling member and an electrical conductivity of the conductive material of the film.