RU2215228C1 - Method of manufacture of pipe - Google Patents

Abstract

FIELD: manufacture of pipes. SUBSTANCE: proposed method includes passing fibrous material through binder followed by twisting it in cords and removing excessive binder from surface of cords; then cords are wound in spiral crossing pattern on technological mandrel forming through slots between cords, after which polymerization is performed. EFFECT: enhanced reliability; facilitated procedure. 2 cl, 1 dwg

Description

 The invention relates to the field of pipes.

 A known method of manufacturing a filter pipe, in which a metal pipe with a solid wall perform perforation - see.with. USSR 631174, F 04 D 29/70.

 The disadvantages of this method are its complexity.

 The complexity of the method is explained by the significant duration and the complexity of the perforation of the pipe for a given downhole wall.

 There is another method of manufacturing a pipe, including passing fiber material through a binder, winding it in layers on a technological mandrel and polymerization - see N. Kulikov. The effectiveness of the use of fiberglass pipes in the mining industry. M .: Nedra, 1968, p.16.

 By the totality of the features and the achieved result, this method is closest to the claimed and adopted as a prototype.

 The manufacture of pipes by this method is performed with a solid wall; when performing mechanical perforation of the wall, the method can be used, for example, for the manufacture of filter or irrigation pipes.

 The complexity of manufacturing a pipe by this method has remained virtually unchanged, and the cutting of the power fibers of the pipe during perforation of its wall negatively affects reliability.

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

 To solve this problem, a method of manufacturing a pipe will be improved, including passing fiber material through a binder, wrapping it in layers on a technological mandrel and polymerization.

 The improvement consists in the fact that after passing the fibrous material through the binder, it is twisted into bundles, then excess binder is removed from the surface of the bundles and the bundles are spirally-cross-wound onto the technological mandrel with the formation of through slots between the bundles, after which polymerization is performed.

 In an embodiment of the method, the twisting of the fibrous material into bundles and radial slots between the bundles is performed in accordance with a predetermined boreholeness of the pipe wall.

 Passing the fibrous material through the binder, twisting it into bundles and removing excess binder from the surface of the bundles ensures a compact and rigid cross-section of the roving filled with binder between the threads and without excess from the outside.

 Performing a spiral-cross winding of the bundles on the technological mandrel with the formation of through gaps between the bundles and subsequent polymerization make it possible to obtain a perforated pipe.

 Twisting the fibrous material into bundles and making gaps between them in accordance with a given wall boreness ensures that a given pipe wall throughput is obtained during winding.

 Below, with reference to the accompanying drawing, describes the method according to the invention.

 The proposed method of manufacturing a pipe includes passing a fibrous material 1 through a binder 2, winding the material 1 onto a technological mandrel 3 (shown by thin lines) and polymerization.

 The method is characterized in that after passing the fibrous material 1 through a binder 2, it is twisted into bundles 4, then excess binder 2 'is removed from the surface of the bundles 4 with a scraper 5 (which ensures a compact and rigid cross-section of a bundle filled with a binder between the threads and without excess him outside).

 Then, the bundles are spirally cross-wound in 4 layers on the technological mandrel 3 with the formation of through slots, for example 6, 7, 8, between the bundles 4, after which polymerization is performed (which allows to obtain a perforated pipe).

 In an embodiment of the method, the twisting of the fibrous material 1 into bundles 4 and radial slots 7, 8 between them is performed in accordance with a predetermined duty ratio (which ensures that a given throughput of the pipe wall is obtained during winding).

 The implementation of the method of manufacturing the pipe according to the invention (due to the perforation of the wall during the winding of the pipe and the abolition of the machining of the cracks) increases the reliability of the method and provides its simplification.

Claims (2)

 1. A method of manufacturing a pipe, including passing the fibrous material through a binder, winding it in layers on a technological mandrel and polymerization, characterized in that after passing the fibrous material through a binder, it is twisted into bundles, then excess binder is removed from the surface of the bundles and cross-wound is wound bundles on a technological mandrel with the formation of through gaps between the bundles, after which polymerization is performed.  2. The method according to p. 1, characterized in that the twisting of the fibrous material into bundles and radial slots between them is performed in accordance with a predetermined boreholeness of the pipe wall.