Quenching structure for tunnel kiln

The utility model discloses a quenching structure for a tunnel kiln, which belongs to the technical field of battery material sintering, and comprises a kiln body and an air inlet system, the air inlet system is connected with the kiln body, the kiln body comprises a wall body, an air inlet channel and a cooling channel, the air inlet channel is communicated with the air inlet system, and the cooling channel is communicated with the wall body. The wall body is arranged on the side face of the cooling channel, the air inlet channel is arranged in the wall body, the air inlet channel penetrates through the part, close to the cooling channel, of the wall body to form a cold air hole, and cold air of the air inlet system is decelerated and preheated through the air inlet channel. The impact on the surface of the crucible through the cooling air holes is reduced, the temperature difference becomes small, the surface of the crucible is not prone to cracking, the service life is prolonged, and the production cost of