| 摘要 |
The present invention relates to a polyethylene pipe for safely coupling the inner circumference. More specifically, by injecting confluent resin, it is possible to differentiate the shape of protrusions on the protruding part of extruded profiles for a dual- or triple-layer pipe, so the profiles can be coupled in a spiral shape using the shape of the protrusions and the protrusions can be coupled to each other. In the remaining spaces, melted resin is filled as a connection agent. By doing so, the polyethylene pipes for safely coupling the inner circumference can significantly improve the coupling force. According to the present invention, the profiles in which a hollow is formed on the inner circumference or in which a plurality of hollows are formed on the inner circumference using a cross-shaped reinforcing band are arranged in a spiral shape, and by putting the connection agent between the profiles, a pipe is formed. On the groove part formed in the lower part of a profile, coupling grooves are formed at regular intervals. Above the groove part, an upper space is formed. On the protruding part formed in the lower part, opposite to the side at which the groove part is formed, of the profile, fixing protrusions corresponding to the coupling grooves are formed. Above the protruding part, another upper space is formed. To the upper spaces, the connection agent is injected to connect the profiles. The coupling grooves and the fixing protrusions have an S-shape and are combined to each other. |
