A pvc pipe thread drawing device with internal and external double clamping functions

Abstract

The invention discloses a PVC pipe thread wire drawing device with inner and outer clamping functions. The PVC pipe thread wire drawing device structurally comprises a cantilever crane, a clamping structure, a gear box, a speed reducer, a brake and a motor. The clamping structure is arranged right in the middle of the top surface of the gear box. A screw tap is further arranged on the same axis with the clamping structure. A cantilever crane is arranged on one side of the gear box. The speed reducer is arranged at the bottom of the side surface of the gear box and cantilever crane and is mechanically connected with the motor through the brake. The motor and the speed reducer are arranged on the same axis. An outer clamping sleeve and an outer expanding inner clamping sleeve are used for locking a PVC pipe from the outside. The PVC pipe is stably fixed in an inner side outer expansion mode. It is ensured that relative sliding between the outer clamping sleeve and the outer expanding inner clamping sleeve is not generated. Finally, it is realized that relative sliding is not generated during thread wire drawing of the PVC pipe, namely, the thread wire drawing depth is proper. The product percent of pass is high.

Description

technical field [0001] The invention relates to the field of PVC pipes, in particular to a PVC pipe thread drawing device with the functions of internal and external double clamping. Background technique [0002] PVC pipe is hard polyvinyl chloride pipe, which is made of polyvinyl chloride resin, stabilizer, lubricant, etc., and then extruded by hot pressing. Before thread drawing, both ends of the straight tubular PVC pipe are smooth on the inside and outside. Therefore, when thread drawing, the PVC pipe is fixed on the card seat and moves to cooperate with the tap to carry out thread drawing. The pipe and the card seat slide relative to each other, resulting in that after the thread drawing is completed, the thread length of the threaded end of the PVC pipe is not enough, that is, the size specification does not match. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the present invention is realized through the following technical solutio...

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Problems solved by technology

[0002] PVC pipe is hard polyvinyl chloride pipe, which is made of polyvinyl chloride resin, stabilizer, lubricant, etc., and then extruded by hot pressing. Before thread drawing, both ends of the straight tubular PVC pipe are smooth on the inside and outside. Therefore, when thread drawing, the PVC pipe is fixed on the card seat and moves to cooperate with the tap to carry out thread drawing. The pipe and the card seat slide relative to each other, resulting in the length of the thread at the end of the PVC pipe thread processing is not enough, that is, the size specification does not match after the thread drawing is completed.

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