PVC (polyvinyl chloride) pipeline joint with expansion amount

The utility model discloses a PVC (polyvinyl chloride) pipeline joint with expansion and contraction quantity, which belongs to the field of pipeline joints and comprises a four-way pipeline joint structure, four sliding protection pipes are mounted on the four-way pipeline joint structure in a sliding manner, and each sliding protection pipe consists of a pipeline base body and an anti-falling limiting sliding block. The multiple anti-disengaging limiting sliding blocks are symmetrically installed on the inner wall of the pipeline base body, four sealing connection corrugated pipes are symmetrically arranged on the positions, on the inner sides of the four sliding protection pipes, of the four-way pipeline connector structure, and four telescopic connecting pipes are installed at the outer ends of the four sliding protection pipes and the outer ends of the four sealing connection corrugated pipes. The sliding protection pipe and the sealing connection corrugated pipe are arranged on the four-way pipeline joi