Pipe contracting device for suction pipe

The utility model discloses a pipe shrinking device for suction pipes, which relates to the technical field of suction pipe production and comprises a working platform, an automatic thick pipe blanking unit and an automatic thin pipe blanking unit which are identical in structure are respectively and fixedly mounted above the working platform, and the automatic thick pipe blanking unit and the automatic thin pipe blanking unit are arranged in an existing thick pipe shrinking processing area and an existing thin pipe shrinking processing area. A set of automatic discharging unit is additionally arranged on each pipe contracting mechanism, when the discharging units are actually used, a worker places a plurality of thick pipes or thin pipes into the automatic discharging units, then the automatic discharging units can automatically supply needed thick pipes or thin pipes to the pipe contracting mechanisms of the thick pipes or the thin pipes, and therefore an existing manual feeding mode is replaced, and compar