Welding machine for gapless railway tracks, has bottom of gas holder held in position above heat generated by two rear burners

摘要

The bottom of the gas bottle (30) is located directly above the heat generated by the two rear burners (17), which generate a flame with a horizontal angle of 30-60 deg. and vertical angle of 30-50 deg. pointing in the direction of the centre of gravity of the rail head being welded. A needle valve (26) used as a control device is provided between the gas bottle outlet valve (29) and the supply of liquefied gas to the burner. The welding machine comprises a frame (1) movable along rails on rollers (7, 9) and provided with a preferably removable holder (11) for holding the gas bottle with its outlet valve pointing downwards. At least two pairs of heat guide plates (3, 4) and burners are mounted on the frame.