A tensile-strengthened connection method for metal pipe fittings

Abstract

The invention discloses a tensile-strengthening connection method for metal pipe fittings, which is used for sealing connection between metal pipes and metal connecting pipes. One end of the metal connecting pipe is flared to form an intermediate reinforced pipe with two sizes of diameters, and the middle part of the intermediate reinforced pipe is formed with a stepped position due to the flaring; the inner diameter of the port of the metal connecting pipe is larger than the outer diameter of the metal pipe, so The outer diameter of the flared end of the intermediate reinforcing pipe matches the inner diameter of the metal connecting pipe. The present invention adopts the middle reinforcing pipe with a flared structure, which can realize the pressing and locking of the three-pipe wall, and realize the limit locking on the metal connecting pipe by using the flaring step of the middle reinforcing pipe. This connection method is compared with The double-wall pressing greatly enhances the tensile strength, especially the simple structure, and each pipe is very easy to be processed by the flaring method, which greatly reduces the processing cost and greatly improves the connection construction efficiency of metal pipes.

Description

technical field [0001] The invention relates to the technical field of pipe fittings connection, in particular to a tensile-strengthened connection method for metal pipe fittings. Background technique [0002] Pipe fittings are a general term for the components in the pipeline system that play the roles of connection, control, direction change, flow splitting, sealing, and support. According to the material, it is generally divided into plastic pipe fittings and metal pipe fittings. Compared with plastic pipe fittings, metal pipe fittings have the characteristics of durability, strong corrosion resistance and long service life. [0003] The metal pipeline connection methods currently used in China are mainly compression type, compression type and welding connection. The pressing machine seals the connection between the metal pipe fitting and the pipe by hydraulic deformation. Since the crimping part is generally a single-layer hollow tube, this connection method will resul...

AI Technical Summary

Problems solved by technology

Since the crimping part is generally a single-layer hollow tube, this connection method will result in low strength of the crimping part, insufficient pulling force, and the middle part of the sealing ring is prone to hollowing, and the sealing performance is poor, especially for large diameters. , the rubber ring is easy to squeeze out and cause water leakage; therefore, this connection method has the disadvantages of inconvenient maintenance and high maintenance cost, and the construction is very inconvenient

Images