Device suitable for pulse spraying of asphalt and control method

The invention discloses a device suitable for pulse spraying of asphalt and a control method. The device comprises an asphalt spraying assembly and an air cylinder used for controlling the asphalt spraying assembly to uniformly spray asphalt. The asphalt spraying assembly comprises a sleeve arranged on the rectangular asphalt pipe in a penetrating mode and a nozzle installed at the lower end of the sleeve. The sleeve is provided with a side hole for asphalt to flow in. The air cylinder comprises a cylinder body and a piston assembly, the upper end of the sleeve is detachably connected with the lower end of the cylinder body, the piston assembly comprises a piston rod capable of moving in the axial direction of the piston assembly and a sealing head used for sealing the nozzle, and the sealing head is in an inverted circular truncated cone shape. An upper sealing plate is arranged in the cylinder body, a cavity, located on the upper side of the upper sealing plate, in the cylinder body is an upper cavity, the