Surround hot air slow drying device for pet food processing and three-stage baking method

A surround hot air slow drying device for pet food processing, comprising:

• a drying box, provided with a hot air drying unit at a bottom, wherein a circulating conveying unit is provided in the drying box, the circulating conveying unit comprises chains provided on symmetrical sides inside the drying box, the chains are rectangular, a plurality of drying frames are evenly distributed on the chains, a material turning mechanism is provided inside the plurality of drying frames, a positioning component is provided in the drying box, and the material turning mechanism cooperates with the positioning component to turn raw materials in the plurality of drying frames;
• wherein the material turning mechanism comprises a material turning module and a driving module, the material turning module comprises a material turning plate slidably matched with the plurality of drying frames, a cross-section of the material turning plate is an isosceles triangle structure, a direction adjustment plate is provided at a top of the material turning plate, a plurality of first fixing plates are evenly distributed on an inclined surface of the material turning plate, the direction adjustment plate comprises an arc-shaped plate slidably matched with the material turning plate, a plurality of second fixing plates are evenly distributed on the arc-shaped plate, and the driving module is provided inside the material turning plate and used for driving the direction adjustment plate to move reciprocally;
• wherein the driving module comprises a rotating shaft rotatably connected with the material turning plate, a reciprocating screw rod is fixedly connected to the middle of the rotating shaft, a sliding sleeve is slidably connected to the reciprocating screw rod, and a sliding sleeve is fixedly connected with the arc-shaped plate;
• an end of the rotating shaft passes through each drying frame and is fixedly connected with a gear, and one side of the gear is meshed with a rack, the rack is fixedly connected to the drying frame;
• the positioning component comprises a positioning rod elastically connected with the drying box, the rotating shaft is in abutting fit with the positioning rod;
• the positioning component further comprises a trapezoidal block provided at a corner of the drying frame, the trapezoidal block is in sliding contact with the positioning rod, a connection seat is slidably connected to the positioning rod, one end of the positioning rod is elastically connected with the connection seat through a first spring, the connection seat is fixedly connected to the drying box, and the connection seat is provided on an upper right side inside the chain and a lower left side outside the chains.