The utility model belongs to the field of fire-fighting sprayers, and particularly relates to a fire-fighting spray header which comprises a shell for protecting a
water pipe and a
piston device, the
water pipe is arranged in the shell, the water inlet end of the
water pipe protrudes out of one side of the shell, a valve is arranged on the water
pipe, a torsional spring is arranged at the joint of the valve and the water
pipe, and the
piston device is arranged on the shell. A guide rail is arranged on the valve, the
piston device comprises a piston head and a
piston rod, the space between the piston head and a
piston cylinder is filled with gas which expands after being heated, the
piston cylinder protrudes out of one side of the shell, a sliding block is hinged to the end of the
piston rod, and the sliding block is in sliding fit with the guide rail; automatic spraying is completed through the piston device, specifically, gas which expands after being heated exists between the piston head and the
piston cylinder, after the temperature rises to a certain range, the gas expands to push the piston head and open the valve, after the temperature is reduced, the gas is reset through the
torsion spring arranged on the valve, repeated use is achieved, and cost is reduced.