Mandrel pre-cooling device

The utility model relates to a mandrel pre-cooling device, which comprises a baseframe, an upper cover of a cooling box, a lower box body of the cooling box, a water-spraying device of a lower box body and a mandrel, and also includes a rotating shaft which is arranged at one side of the pre-cooling device, a flipping mechanism which is transmittedly connected with the upper cover of the cooling box, a locking mechanism, a compressed air curtain, and two shaft couplings and two limited switches. The upper cover of the cooling box and the rotating shaft are connected with the flipping mechanism by the shaft coupling, and opening of the upper cover of the cooling box is realized under drive of the flipping mechanism. The upper cover of the cooling box is locked with the lower box body of the cooling box through the locking mechanism. The compressed air curtain is arranged on the upper cover of the cooling box to prevent water spill. The limited switch is connected with the flipping mechanism through lines to de