Pipe straightener

A pipe straightener, comprising three roller wheel units and a restraining sleeve, wherein each of the roller wheel units is juxtaposed, and the roller wheel units enclose and are configured to form a long straight-formed passageway, the passageway is used to enable metal pipes to pass therethrough;

• the restraining sleeve encloses and covers each of the roller wheel units, thereby restraining each of the roller wheel units;
• each of the roller units primarily comprises a wheel carrier and a plurality of roller wheels, one side of the wheel carrier is a first side, and the other side is a second side, the first side is adjacent to the passageway, and the second side is adjacent to the restraining sleeve, each of the roller wheels is respectively pivotal disposed on the first side, and the roller wheels are adjacent to the passageway;
• wherein the restraining sleeve is a long tubular body, and each of the roller wheel units is disposed inside the restraining sleeve along the longitudinal direction thereof;
• wherein the restraining sleeve inwardly forms a plurality of limiting portions, and each of the limiting portions is formed between each of the roller wheel units, thereby laterally limiting each of the roller wheel units.