Improved deep and narrow welding seam welding head for common automatic submerged-arc welding machine

The utility model provides an improved deep and narrow welding seam welding head for a common automatic submerged-arc welding machine, and belongs to the field of welding devices. The improved deep and narrow welding seam welding head comprises a conductive wire feeding mechanism and a flux conveying pipe, wherein the conductive wire feeding mechanism comprises a conducting rod and a conducting tube; a welding wire penetrates through the conducting rod and penetrates out from the conducting tube; two parallel side surfaces are arranged in the axial direction of the conducting rod, and other two side surfaces of the conducting rod are arc surfaces; the distance between the two parallel side surfaces is equal to the width of the conducting rod; the flux conveying pipe is arranged on one of the arc surfaces of the conducting rod, and is fixed to the conducting rod through a fixing strap; the cross section of the flux conveying pipe is rectangular; the width of the rectangle is equal to the width of the conducting rod; one end of the flux conveying pipe is connected with a flux hopper, and an inclined opening is formed in the other end of the flux conveying pipe, and is parallel to the conducting rod. According to the improved deep and narrow welding seam welding head, on the basis of keeping original welding performance, the bevel width can be greatly reduced when longitudinal and circular welding seams of a thick-walled cylinder are welded, the filling amount of flux is reduced, the welding time is shortened, the production efficiency is improved, and the welding stress is reduced.