Torch for powder plasma buildup welding

Abstract

A torch for powder plasma buildup welding capable of readily attaining welding in conformity to any size of a pipe material to be subjected to welding, any configuration thereof and the like. A torch head is replaceably connected to a torch body. The torch body is provided with a gap formation spacer member which is abutted against an inner peripheral surface of the pipe material to keep a distance between an opening of a convergent nozzle of the torch head and the inner peripheral surface of the pipe material substantially constant during buildup welding. Also, the torch body is provided with a deflection restraint spacer member which is abutted against the inner peripheral surface of the pipe material to prevent deflection of the torch body in the pipe material during buildup welding.

What is claimed is:  
     
         1 . A torch for powder plasma buildup welding, comprising: 
 a torch head adapted to be inserted into a pipe material of a continuous length to carry out buildup welding on an inner peripheral surface of the pipe material; and    a torch body formed into a continuous length and having said torch head mounted on a distal end thereof;    said torch head being replaceably connected to said torch body.    
     
     
         2 . The torch as defined in  claim 1 , wherein said torch head includes a convergent nozzle having an opening; and 
 either said torch head or said torch body is provided with a gap formation spacer member which is abutted against the inner peripheral surface of the pipe material to keep a distance between said opening of said convergent nozzle of said torch head and the inner peripheral surface of the pipe material substantially constant during welding.