RU2266460C2 - Method of manufacturing linings with collar for pipe joint - Google Patents

Abstract

FIELD: pipeline transport.

SUBSTANCE: method comprises making multi-positioned mandrel, winding fiber material with a binder on the mandrel with the use of the winding machine-tool to provide a cylinder with collars, polymerizing the cylinder, and cutting the cylinders into linings with collars .

EFFECT: enhanced quality.

Description

The invention relates to pipeline transport.

A known method of manufacturing linings for connecting pipes, including the manufacture of tooling, forming blanks from a fibrous material with a binder, polymerization and machining of blanks used at OOO Potok-M, Perm (in 2002) in the manufacture of the experimental "Plastic Connections fiber reinforced pipes "according to the application EPO (EP) No. 0152752 F 16 L 47/00.

With this method, the tooling is performed in the form of a mold in which a semi-cylinder preform with a smooth cylindrical inner surface is formed from a nonwoven fibrous material with a binder, polymerization is performed, and then smooth annular grooves are obtained by machining.

The disadvantage of this method is the low reliability of the linings obtained with its use due to the weak force closure of the non-woven fibrous material in them, which is further aggravated by cutting its fibers during machining of the annular grooves.

There is another method for the manufacture of linings with beads for connecting pipes, including the manufacture of tooling, molding of blanks from a fibrous material with a binder, polymerization and machining of blanks used at the same enterprise in the manufacture of the experimental "Device for connecting reinforced plastic pipes" according to patent RU No. 215063 F 16 L 47/02 - see the attached "Process for the manufacture of linings d _at 500", dev. MS500.02.000 - experimental, development of Potok-M LLC, 06/15/2003, Perm.

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

Preforms are also formed in this method from nonwoven fibrous material in a mold, but without subsequent mechanical processing of the inner surface of the overlays with fiber cutting; machining consists only in stripping the flake.

The reliability of this method is enhanced.

However, the achieved positive result remains insufficient due to the preserved weak force circuit of the fibrous material in the finished product.

The objective of the invention is to increase the reliability of the method.

This problem is solved by improving the method of manufacturing plates with beads for connecting pipes, including the manufacture of tooling, forming blanks from a fibrous material with a binder, polymerization and machining of blanks.

The improvement consists in the fact that they make equipment in the form of a multi-position mandrel for cylinders with beads, then rotate the mandrel in a winding machine on it to form fibrous material with a binder in the form of cylinders with beads, then polymerization and machining of the cylinder blanks by cutting them into overlays with beads.

The manufacture of equipment in the form of a multi-position mandrel for cylinders with beads, the subsequent rotation of the mandrel in a winding machine with the formation of fibrous material with a binder in the form of cylinders with beads on it and the polymerization allows to obtain a cylinder blank with beads with increased force closure of the composite fiber material.

Performing mechanical processing of cylinder blanks by cutting them into pads with beads allows you to get pads with increased power short circuit of the composite fiber material and thereby improve the reliability of the method.

The invention is illustrated by a technical process with sketches (figures 1 and 2).

A method of manufacturing overlays with flanges for connecting pipes includes the manufacture of tooling in the form of a multi-position mandrel 1 for cylinders with collars, then by rotating the mandrel 1 in a winding machine (shown by the arrow), it is formed by winding fibrous material with a binder of the workpiece in the form of cylinders 2 with collars 3 and perform polymerization (which ensures the preparation of cylinder blanks with increased power short circuit of the composite fiber material); then, the billets of the cylinders 2 are machined by cutting them (for example, with an emery wheel) into pads 4 with beads 5 (which ensures obtaining the latter with an increased power short circuit of the composite fiber material).

The method according to the invention (due to the increased, in comparison with the prototype, power closure of the composite fiber material of the manufactured overlays) has increased reliability.

Claims (1)

A method of manufacturing overlays with beads for connecting pipes, including the manufacture of tooling, forming a workpiece from a fibrous material with a binder, polymerization and machining of the workpiece, characterized in that the tooling is made in the form of a multi-position mandrel, then, by rotating the mandrel in a winding machine, it is formed by winding fibrous material with a binder, the workpiece is in the form of cylinders with beads, and after polymerization of the workpiece, the cylinders are cut into strips with beads.

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