SU929951A1

SU929951A1 - Pipe

Info

Publication number: SU929951A1
Application number: SU782660510A
Authority: SU
Inventors: Владимир Афанасьевич Кореньков; Анатолий Григорьевич Фишбейн; Леонид Львович Стариковский
Original assignee: за вители r-;).v-,v.,., | -.. -..- /-;, . Фишбейн и Л. Л. Стр| Ковский GME:,|f;:n-,,.-.
Priority date: 1978-08-31
Filing date: 1978-08-31
Publication date: 1982-05-23

Description

(54) ТРУБА(54) PIPE

1one

Изобретение относитс к производству термопластичных труб, армированных металлическим каркасом, и может быть использовано дл изготовлени трубопроводов, примен емых .дл транспортировани жидких и газообразных агрессивных сред при высоких давлени х, при вакууме, при больших температурных колебани х. Кроме того, изобретение может быть применено дл обсадки скважин при подземном выщелачивании .The invention relates to the manufacture of thermoplastic pipes reinforced with a metal frame, and can be used for the manufacture of pipelines used to transport liquid and gaseous corrosive media at high pressures, under vacuum, at large temperature fluctuations. In addition, the invention can be applied for casing wells during underground leaching.

Известны термопластичные трубы, включающие усилители прочности в виде металлических продольно расположенных стержней - стрингеров и переплетенных с ними поперечных витков - нервюр 1.Thermoplastic pipes are known, including strength enhancers in the form of metal longitudinally arranged cores — stringers and transverse windings — ribs interlaced with them 1.

Недостатком этих труб вл етс то, что термические линейные колебани термопласта в 8-10 раз больще, чем у металла, эксплуатаци трубопроводов, выполненных из термопластичных труб, армированных плетеным каркасом, при больщих температурных колебани х и значительных осевых нагрузках затруднена и требует установки специальных компенсирующих устройств с больщими разрешающими возможност ми по компенсации линейных изменений.The disadvantage of these pipes is that the thermal linear vibrations of the thermoplastic are 8-10 times greater than that of the metal; the operation of pipelines made of thermoplastic pipes reinforced with a woven frame, with large temperature fluctuations and significant axial loads, is difficult and requires special compensating devices with greater resolution capabilities to compensate for linear changes.

Наиболее близкой по технической сущности и достигаемому эффекту к предлагаемой вл етс труба, включающа усилитель прочности в виде металлического сетчатого каркаса, состо щего из стрингеров и 5 нервюр, жестко скрепленных в точках их пересечени , например, сваркой 2.The closest to the technical essence and the achieved effect to the proposed is a pipe that includes an amplifier of strength in the form of a metal mesh frame consisting of stringers and 5 ribs rigidly fastened at their intersection points, for example, by welding 2.

К недостаткам этих труб относитс их больша материалоемкость, громоздкость и неприменимость дл транспортировки аг10 .рессивных сред и обсадки скважин при подземном выщелачивании.The disadvantages of these pipes are their high consumption of materials, bulkiness and inapplicability for transportation of aggressive media and well casing during the in-situ leaching.

Цель изобретени - увеличение сопротивлени радиальным нагрузкам.The purpose of the invention is to increase resistance to radial loads.

Эта цель достигаетс тем, что толщина слоев трубы, прилегающих к каркасу с внут15 ренней и наружной сторон, и толщина каркаса равна сумме толщин стрингеров и нервюр , св заны соотношениемThis goal is achieved by the fact that the thickness of the pipe layers adjacent to the framework from the inner and outer sides, and the thickness of the framework equal to the sum of the thicknesses of the stringers and ribs, are related by the relation

-|- 0,2ч-0,8,- | - 0,2h-0,8,

где В - толщина слоев трубы в поперечном 20сечении;where B is the thickness of the pipe layers in cross section 20;

S - толщина каркаса.S is the thickness of the frame.

На чертеже изображена предлагаема труба.The drawing shows the proposed pipe.

Claims

The pipe is made of thermoplastic plastic 1, for example, high density low density polyethylene used to manufacture pipes used to transport chemical media, and a strength reinforcement in the form of a skeleton consisting of metal longitudinal strength elements — stringers 2 and transversely wound ribs on stringers 3 of any profile interconnected at all intersection points. When the width of layers B of the thermoplastic in the cross section of the pipe is less than 0.2 of the thickness of the frame S, the walls of the pipes obtained are excessively thin, in the thermoplastic there are large shrinkage stresses, especially in the cell centers, and the surface of the pipe acquires a characteristic metal frame pattern. Such pipes do not withstand the enormous power loads and temperature fluctuations, since the walls break along the thermoplastic. When the width of layers B of the thermoplastic is greater than 0.8 of the thickness of frame S, a shift of the layers of thermoplastic is observed under temperature and force loads relative to the frame and the adjacent layer of thermoplastic fixed to it as a result of an increase in the mass of thermoplastic and its plasticity by reducing the strength of adhesion forces between the frame and separated layers of thermoplastic. Claims of the invention A pipe mainly of thermoplastic containing an amplifier of strength in the form of a metal mesh frame consisting of stringers and ribs rigidly fastened at their intersection points, for example, by welding, characterized in that, in order to increase the resistance to radial loads, the thickness of the layers the pipes adjacent to the frame from the inner and outer sides, and the thickness of the frame, is equal to the sum of the thicknesses of the stringers and ribs, and are related by the relation В - о 2О 8 О the thickness of the pipe layers in the cross section; S is the thickness of the frame. Sources of information taken into account in the examination 1. USSR patent number 472518, cl. F 16 L 9/16 pub. 1970.

2. US patent number 3871410, cl. F 16 L 9/08 pub. 1975 (prototype).