Ultra-fine dry powder cold aerosol explosion suppression device for oil tank

The invention discloses an ultra-fine dry powder cold aerosol explosion suppression device for an oil tank. The device comprises a connecting seat, a spray head, a fire drencher, a control circuit board and a pressure sensor; the connecting seat is fixedly connected onto the oil tank through screws; a through hole is formed in the connecting seat; the upper end of the spray head is connected with the lower surface of the connecting seat; a fire-fighting joint is arranged at the lower end of the spray head; multiple spray holes are formed in the side wall of the spray head; the fire drencher is filled with an ultra-fine dry powder fire extinguishing agent and a starting explosive; the upper end of the fire drencher is connected with the spray head; a membrane is arranged between the fire drencher and the spray head; the control circuit board is electrically connected with the starting explosive through a detonating signal line; the pressure sensor is arranged in the oil tank; and the pressure sensor is electri