Quick die-changing device for PVC (polyvinyl chloride) pipe production

The utility model discloses a quick die-changing device for PVC (polyvinyl chloride) pipe production. The device adopts the structure that each of a first die clamp and a second die clamp is provided with a semicircular cavity, and the semicircular cavities are used for holding a die assembly in a sleeving manner and adopt the same structures; the two ends of each of the first die clamp and the second die clamp are respectively in threaded transmission connection with a first screw rod and a second screw rod; a screw rod fixing plate is arranged on the outer side of each of the first die clamp and the second die clamp; the screw rod fixing plates are movably connected with the first screw rod and the second screw rod; the end parts of the first screw rod and the second screw rod are connected with a chain transmission mechanism for the linkage rotation of the first screw rod and the second screw rod; the chain transmission mechanism comprises gears respectively connected to the end parts of the first screw rod and the second screw rod and a transmission chain connected between the gears. According to the quick die-changing device, the labor intensity of a worker during die-changing can be well alleviated, the replacing speed is high, the mechanical operation is realized, and the accuracy and the safety of mounting and positioning of a die are improved.