The invention discloses a circulating
water cooling liner device for
welding. The
liner device comprises a
liner device body an a circulating
water cooling device. The grooves of two to-be-welded plates are oppositely fixed on the upper side of the liner device body. The circulating
water cooling device is connected with the liner device. A recessed longitudinal arc-shaped forming groove is formed in each of the four sides of a
copper liner which is longitudinally positioned through a retaining plate. A water pump water outlet
pipe is connected with a cooling water circulating hole of the
copper pad and is connected with a water return
pipe of a
water storage tank through a water return hose. The invention further discloses an application method of the circulating water cooling liner device. The method includes: fixing a liner seat; selecting the width W1 of each longitudinal arc-shaped forming groove of the
copper liner; tightly pressing the copper liner through the retaining plate; connecting water pipes at two ends of the copper liner; fixing the two to-be-welded plates; starting a water pump to feed water so as to cool the copper liner, and
welding the two to-be-welded plates. By the longitudinal arc-shaped forming grooves in the copper liner,
utilization rate of the copper liner is increased by three times,
welding of plates of different thicknesses can be satisfied, and application cost is lowered.