VACUUM TUBE ASSEMBLY

摘要

A vacuum pipe assembly is provided to prevent damage to an outer tube by including an exhaust port with one end connect to the exhaust hole and a cap coupled to the other end of the exhaust port. A vacuum pipe assembly comprises: an inner tube(12) in which fluid flows; an outer tube(14) covering the outer side of the inner tube and having an exhaust hole(16) in one side; an exhaust port(18) with one end connected to the exhaust hole; a cap(30) coupled in the other end of the exhaust port; and a stopper(20) opening and closing the exhaust hole. In the other end outer circumference of the exhaust port and the inner circumference of the cap, a screw thread is formed and the exhaust port and the cap are screwed up.