RU2321792C2 - Fitting for pipelines made of polyethylene reinforced pipes - Google Patents

Abstract

FIELD: pipeline engineering.

SUBSTANCE: fitting comprises metallic housing, polyethylene branch pipes made of polyethylene reinforced pipes, and connecting pipes. The connecting pipes are made for permitting one end of the pipe to be secured to the metallic housing and other end to be pressed into the polyethylene branch pipe.

EFFECT: enhanced reliability.

1 cl, 4 dwg

Description

The invention relates to the field of connections of polyethylene reinforced pipes designed to change direction and receive bends during the construction of high pressure pipelines, up to 1.8 MPa (18 atm), transporting liquid and gaseous media.

A known fitting made of polyethylene [1], adopted as a prototype, which is a plastic pipe in the form of a corner with fittings installed in it and a thread cut at the outer diameter at each end of the fitting. Cap nuts are screwed onto the thread to secure the pipe to fittings.

The disadvantage of this device is the inability to use in high pressure pipelines up to 1.8 MPa (18 atm) due to the weak connection of fittings with pipes.

The problem solved by the invention is to create connecting parts for pipelines used to change the direction of pipelines, providing strength and tightness of the pipe connection under high pressure, up to 1.8 MPa (18 atm), to prevent the possibility of destruction in places of changing the direction of the pipeline (in places discharge from the pipeline), as well as ease of installation and reducing the time to install the pipeline. The fittings are connected to the pipes by butt welding with hardening by couplings, which provides a more reliable connection.

To solve this problem, a fitting has been developed for pipelines made of reinforced polyethylene pipes, containing polyethylene pipes made of reinforced polyethylene pipes, pressed onto a metal body through a fitting having ring teeth, with additional hardening by a metal ring. The design of the fitting for pipelines of polyethylene reinforced pipes is shown in Fig.1-4.

Figure 1 shows a longitudinal section of the proposed fitting, the metal body of which is bent at an angle of 90 °.

Figure 2 shows a longitudinal section of the proposed fitting, the metal body of which is bent at an angle of 45 °.

Figure 3 shows a longitudinal section of the proposed fitting, the metal casing of which is made with a hole in the wall for mounting the fitting to obtain a bend under 90 °.

Figure 4 shows a longitudinal section of the proposed fitting, in which the role of the metal body performs a metal pipe, which is part of the pipeline.

The fitting for pipelines made of polyethylene reinforced pipes consists of a metal casing 4 made of a metal pipe. At the ends of the metal housing 4, fittings 3 are fixed, polyethylene pipes 1 are pressed onto the fittings 3, the metal ring 2 additionally strengthens the structure.

Information sources

1. Website address - http://www.pcvexpo.ru/2005/files/price_list/file1008.pdf or http://www.pvc-fittings.ru/FitingCompres/FitingCompres.htm

Claims (2)

1. A fitting for pipelines made of reinforced polyethylene pipes, made in the form of a metal body, polyethylene pipes made of reinforced polyethylene pipes, and fittings, while the fittings are made with the possibility of fastening at one end in a metal case, and the other - press-fit into polyethylene pipes. 2. The fitting according to claim 1, characterized in that it is equipped with a metal ring with the possibility of additional hardening of the fitting of the fitting into the polyethylene pipe.

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