RU2191315C1 - Pipeline - Google Patents

Abstract

FIELD: construction of pipelines from reinforced plastic mass. SUBSTANCE: pipeline has combined plastic pipes with units for their jointing and metal adapters to reinforcement with joint device. Metal adapter is made with a plastic layer inside it. Joint device of metal adapter with end combined pipe is made in the form of plastic pipes joint unit. EFFECT: higher pipeline reliability and its simplified manufacturing technology. 4 dwg

Description

 The invention relates to the field of pipes made of plastics made with reinforcement, more specifically to pipelines.

 A well-known pipeline containing combined plastic pipes with nodes of their connection and a metal transition to fittings with connecting devices - see the attached drawing for "Du75 pipeline", code KN-043.00.00.000SB, developed by ZAO Composite-Neft, Perm, 1996 (Fig. 3).

 Plastic pipes of such a pipeline are interconnected by welding protruding plastic (polyethylene) ends and locking assemblies, covering the flanges of the fiberglass reinforcing layer.

 The end pipe joined to the transition is made with the flanged end of the plastic pipe; the end pipe is connected to the transition by means of flanges with coupling bolts and a rubber seal between the flanges.

 The disadvantages of such a pipeline are low reliability and technological complexity of manufacture.

 Low reliability is explained by the complex design of the flange assembly of the pipe end pipe and the low resistance of the rubber seal.

 The technological complexity of manufacturing is explained by the fact that the manufacture of the end pipe and the device for its connection with the transition is carried out using original technologies different from the technologies for manufacturing the main pipes and their connection nodes, which also negatively affects the reliability of the pipeline.

 Another pipeline is known, containing combined plastic pipes with nodes of their connection and a metal transition to fittings with a connection device - see the attached drawing for “Du13 Pipeline”, code KN-041.00.00.000SB, developed by Composite Neft CJSC, Perm , 2000 (Fig. 4).

 In terms of the totality of features and the achieved result, this pipeline is closest to the claimed one and adopted as a prototype.

 The joints of the combined plastic pipes are structurally made as in the previous pipeline. Its end pipes are made without flanging a plastic pipe - with its closure in the lock (dead end); connection of the transition with the end pipe is made similarly - flanged.

 Due to the structural simplification of this pipeline, its reliability is slightly increased, and the manufacturing technology is simplified.

 The result achieved in this pipeline remains, however, insufficient.

 The objective of the invention is to increase the reliability and simplify the manufacturing technology of the pipeline.

 To solve this problem, a pipeline will be improved, containing combined plastic pipes with nodes for their connection and a metal transition to fittings with connection devices.

 The improvement consists in the fact that the transition is made with a plastic layer inside, and the connection device of the transition with the combined plastic pipe is made in the form of a node connecting the combined pipes to each other.

 Performing the transition with a plastic layer inside allows you to complete the end of the metal transition constructively, as in a combined plastic pipe.

 The implementation of the connection device of the transition with the combined plastic pipe in the form of a node connecting the combined pipes to each other allows you to unify the end pipe with the others, and the device of its connection with the transition to unify the connection node of the combined plastic pipes and seal the joint of the end pipe with the transition by welding the plastic pipe with a plastic layer transition, due to which to increase reliability and simplify the technology of manufacturing the pipeline.

The invention is illustrated in the drawing, which shows:
figure 1 - pipeline in General view;
figure 2 - connection of the transition with the end combined plastic pipe.

 The proposed pipeline contains combined plastic pipes 1 with nodes 2 of their connection and a metal transition 3 to the fittings (not shown) with connection devices. The transition 3 is made with a plastic (polyethylene) layer 4 inside, and the connection device of the transition 3 with the end combination pipe A is made in the form of a node 2 for connecting the combined pipes to each other.

 In the manufacture of the pipeline, the end pipe A is made according to the drawings and technology of the main pipe 1 (due to which the individual technical process of manufacturing the end pipe is eliminated); the connecting elements B of the transition 3 are made according to the dimensions of the connecting elements B of the pipe 1 (A), which allows the connection of the pipe A and the transition 3 to be performed by the node 2 and by the technology of connecting the pipes 1 (due to which the device design and connection technology are unified).

 When assembling the pipeline, the polyethylene layer G of pipe A and the plastic layer 4 of the transition 3 are welded with a seam 5 (thereby increasing the sealing reliability) and the space above it is filled with filler 6, after which half-clamps 7 and 8 with self-hardening composition 9 are installed and half-clamps 7 and 8 are fixed with rings 10 on glue.

 The implementation of the pipeline according to the invention provides improved reliability and simplification of its manufacturing technology.

Claims (1)

 A pipeline containing combined plastic pipes with nodes of their connection and a metal transition to fittings with connection devices, characterized in that the transition is made with a plastic layer inside, and the connection device of the transition with the combined pipe is made in the form of a node connecting combined pipes to each other.

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