Fire control self-reset closed spray nozzle

The utility model relates to a novel fire control spray nozzle, particularly to a fire control self-reset closed spray nozzle, which belongs to the technical field of fire control water systems, and is characterized in that the fire control self-reset closed spray nozzle is shaped as a hollow column; the upper cavity is a water inlet guide pipe (1); a spherical piston (2) is arranged inside the water inlet guide pipe (1), and seals the water outlet in the lower part of the water inlet guide pipe (1); the lower cavity is provided with a memory alloy ejector rod (3) and a self-reset linkage rod (4); the upper end of the memory alloy ejector rod (3) is propped against the lower part of the spherical piston (2); the memory alloy ejector rod (3) extends upwards when heated, and the self-reset linkage rod (4) bends upwards when heated, so that the spherical piston (2) is jacked upwards; the memory alloy ejector rod (3) and the self-reset linkage rod (4) reset after being cooled; a baffle is arranged at the lower part of the lower cavity, and is provided with a mist spraying hole.