VACUUM TIGHT THREADED JUNCTION

摘要

A method for making junctions between a first body (A) made of a first material includes a tube (A1) and a second body (B) made of a second material and having a hole (B1) for the insertion of the tube (A1). The method includes the threading (A3) of the tube (A1) for screwing in a corresponding threaded portion (B3) of the hole (B1) in the second body (B), the creation of a recess (B2) in the opening of the hole (B1) in the second body (B) and the creation of a ring (A5) at the end (A2) of the tube (A1), wherein the ring (A5) and the recess (B2) have such a shape and size that the ring (A5) is forced in the recess (B2) producing a plastic deformation and thus a seal through interference between the first and second body.

主权项

1. A method or technique for making heterogeneous or homogeneous junctions between weldable or non-weldable materials in order to join:
a first body made of a first material and comprising at least one tubular portion or tube and a second body made of a second material and comprising a hole for the insertion of at least one portion of said tube of the first body, said first and said second material being made of the same or different materials, wherein it comprises the following steps:
making a thread on at least part of the external surface of said tube of the first body for screwing said tube in a corresponding threaded portion that is integral with or created in said second body;making at least one annular seat or recess in proximity to or at the level of the inlet of said hole in said second body;making at least one ring, whose walls have a convergence angle different from that of the walls of said recess, on said external surface of said tube of the first body,and wherein said ring and said recess have such a shape and size that, once said tube of the first body has been at least partially inserted in said hole in the second body and said tube has been screwed in said second body, said ring is forced into said recess obtaining the plastic deformation of said ring and/or of said recess and thus a seal through interference between said first body and said second body.