Pipe thread expanded connection port, equal wall thread connector pipe and pipe fitting thereof

Abstract

The invention provides a pipe thread expanded connection port, an equal wall thread connector pipe and a pipe fitting thereof. By means of the pipe thread expanded connection port, traditional national standard thread pipe fittings are connected with the equal wall thread connector pipe, or the equal wall thread connector pipe and the pipe fittings are mutually connected so that the connection port forms an expanded seal ring without connection gaps by means of plastic deformation of a thread, sealing strength and connection port firmness of the pipe thread connection port can be effectively improved, simultaneously, the equal wall thread connector pipe is further provided with pipes with various length specifications, the front portions of thread connectors at two ends of the pipes are taper pipe screw threads, the rear portions of thread connectors at two ends of the pipes are lengthened cylinder pipe screw threads, the length difference of two adjacent specifications of the pipes is equal to the added value of the length of the cylinder pipe screw threads at the two ends of the pipes, accordingly, threaded connectors at the two ends of the pipes are cut, and then the threaded connectors which are shortened by cutting is subjected to taper pipe shaped diameter reducing plastic deformation to obtain the thread connector pipe with required length so that cumbersome processing of pipe threads can be avoided in installation scenes.

Description

technical field [0001] The patent of the present invention relates to a pipe connection interface, especially the connection of high-pressure pipes. Background technique [0002] Pipeline transportation is the most convenient and efficient method of medium transportation. Pipes must be connected to become pipelines. Therefore, the quality of pipe connections determines the safety and reliability of pipeline transportation. At present, the threaded connection interface used by small and medium-diameter pipes is the fastest and most convenient way to connect. However, due to the deviation of the tooth shape processing of the traditional threaded joint U, it is necessary to rely on fillers to fill the gaps in the thread pair to achieve the sealing effect. However, the use strength and life of the fillers are far lower than the material of the pipe, which makes the threaded joints difficult. It solves the problem of stomach dripping, so the self-connection reduces the safety an...

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