The utility model relates to the technical field of power transformation box protection, and discloses an automatic fire extinguishing mechanism for power transformation box protection, which comprises a power transformation box, a box door is arranged on one side of the power transformation box, a connecting
pipe is inserted in one side of the power transformation box, a fixing plate is arranged on one side of the outside of the power transformation box, and a fire extinguishing agent
storage tank is placed on the fixing plate. A locking structure is arranged between the outer wall of the
transformer box and the fire extinguishing agent
storage tank, one end of the connecting
pipe is connected with the fire extinguishing agent
storage tank, a spray head is arranged at the end, located in the
transformer box, of the connecting
pipe, an
electromagnetic valve is arranged on one side of the spray head, and a mounting plate is arranged on one side in the
transformer box; a controller connected with the
electromagnetic valve is arranged on the mounting plate, and a
smoke sensor connected with the controller is arranged on one side of the mounting plate. Compared with the prior art, the automatic fire extinguishing device has the advantages that
fire disasters can be automatically detected, alarms can be timely given, the fire extinguishing agent storage tank can be timely opened to effectively extinguish fire, the safety of the power transformation box is improved, and fire disaster loss is reduced.