Double wall pipe connection structure of screw connection way

摘要

The present invention is of a rectangular or circular holes to be formed inside the double-walled tube which one or a plurality of molding so that when a separate connector can be easily connected without the need for a double-walled tube ; More specifically, each screw is a double-walled tube is a separate connector which is a female thread and the male thread formed in a piece on both sides of the tube without the screw simply connected by a method that combines the formula and the drill hole is formed in a portion of the double-walled pipe and connected to the structure of the screw connection to the supply holes connected to the closure member to the leak off. ; The present invention is internally threaded portion 90 is screw-molded double-walled tube (70) forming a male thread on the part 91 to one side of the double-walled tube the outer wall 72 and inner wall 71 of the other side; ; The double-walled tube the screw 70 is continuously connected to the female thread 90 and the male thread portion 91 for connecting to a drill which is formed on the outside of the female threaded portion 90 is a hole (D) and the; ; is the drill hole (D) is supplied through the filling Sikkim characterized by the closure member (B) in the molded hollow space (31).