DK150954B

DK150954B - Method for joining thermally insulated pipes

Info

Publication number: DK150954B
Application number: DK391080AA
Authority: DK
Inventors: Tommy Ogebro
Original assignee: Ecopipe Ab
Priority date: 1979-09-14
Filing date: 1980-09-15
Publication date: 1987-09-28
Also published as: FI802880A; FI74791B; NO802742L; NO156386B; FI74791C; SE7907647L; SE422838B; DK150954C; DK391080A; NO156386C

Description

i 150954in 150954

Den foreliggende opfindelse angår en fremgangsmåde til samling af varmeisolerede rør og af den i krav l's indledning angivne art.The present invention relates to a method for assembling heat-insulated pipes and of the kind specified in the preamble of claim 1.

Ved samling af rør har man tidligere hovedsageligt 5 anvendt rørbøjninger i form af en enhed bestående af et indre rør med isoleringsmateriale, som omslutter dette indre rør. Isoleringen udgør derved en betydelig volumendel af rørbøjningen, og da et stort antal rørbøjninger med varierende krumning skal lagerføres, må en belo tydelig del af et lager benyttes til disse rørbøjninger.In the case of pipe assembly, pipe bends have previously been used mainly in the form of a unit consisting of an inner pipe with insulating material which encloses this inner pipe. The insulation thus constitutes a considerable volume part of the pipe bend, and since a large number of pipe bends with varying curvature must be stored, a significant part of a bearing must be used for these pipe bends.

Også i servicekøretøjer har rørbøjningers volumen udgjort et problem.The volume of pipe bends has also been a problem in service vehicles.

Fra britisk patentskrift 962.180 er kendt en fremgangsmåde til samling af sådanne isolerede rør, ved hvil-15 ken en rørdel med passende vinkeludformning forbindes med inderrøret i det ene rør, hvorefter et hylster påsættes rørdelen og forskydes over de indbyrdes forbundne ender, således at den anden ende af rørdelen bliver frit tilgængelig og kan forbindes med inderrøret i et andet 20 rør. Hylsteret forskydes derefter mod rørdelens midte og forbindes ved begge ender med rørenes hylstre. Derefter indføres isoleringsmateriale i rummet mellem hylster og rørdel.British Patent Specification 962,180 discloses a method for assembling such insulated tubes, in which a tubular member of suitable angular design is connected to the inner tube of one tube, after which a casing is attached to the tube portion and displaced over the interconnected ends so that the other end of the pipe portion becomes freely accessible and can be connected to the inner pipe of another 20 pipe. The casing is then displaced toward the center of the pipe member and connected at both ends to the casing casings. Then, insulating material is introduced into the space between the casing and pipe portion.

Denne kendte fremgangsmåde gør det ikke muligt at 25 anvende ens hylstre til et stort antal varierende bøjningsvinkler på røret med mulighed for forenklet lagerføring af dele og en forenklet fremgangsmåde ved sådanne rør, som udviser stor indbyrdes retningsændring. Ved samling af to rør, som eksempelvis danner en indbyrdes vin-30 kel på 90°, skal hylsteret trækkes over det ene rør, hvilket imidlertid ikke ved den kendte fremgangsmåde er muligt ved store rørvinkelforskelle på grund af, at hylsterets krumning og dets store længde vanskeliggør, at det påsættes et i det væsentlige retlinet og med hylster 35 forsynet rør. Eventuelle vinkelafvigelser mellem to rør kan derved heller ikke optages af hylsteret.This known method does not make it possible to apply similar casings to a large number of varying bending angles on the tube with the possibility of simplified storage of parts and a simplified method for such tubes which exhibit large mutual change of direction. When assembling two tubes which, for example, form a mutual angle of 90 °, the casing must be pulled over one tube, which, however, is not possible in the known method for large tube angular differences because of the curvature of the casing and its large length. making it difficult to attach a substantially straight line and casing 35. Also, any angular deviations between two tubes cannot be absorbed by the casing.

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Formålet med nærværende opfindelse er at undgå de ovennævnte ulemper, og dette opnås ved at gå frem på den måde, der omhandles i den kendetegnende del af krav 1.The object of the present invention is to avoid the above-mentioned drawbacks, and this is achieved by proceeding in the manner according to the characterizing part of claim 1.

5 Opfindelsen skal i det følgende forklares nærmere under henvisning til tegningen, hvor fig. 1 viser to rør, som skal forhindes i en ønsket vinkelstilling, og et løst hylster til en 10 rørbøjning, fig. 2 de to rør forbundet med rørbøjningen, og fig. 3 hen færdige rørsamling.BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be explained in more detail with reference to the drawing, in which: 1 shows two pipes to be prevented at a desired angular position and a loose casing for a pipe bend; FIG. 2 shows the two pipes connected to the pipe bend; and FIG. 3 finished pipe assembly.

De rør 1 og 2, som skal samles, består af isolerede rør, fortrinsvis såkaldte varmerør, dvs. et indre rør, 15 som transporterer fluidum med en temperatur, som overstiger omgivelsernes temperatur.The pipes 1 and 2 to be assembled consist of insulated pipes, preferably so-called heating pipes, ie. an inner tube 15 which carries fluid at a temperature which exceeds the ambient temperature.

Hvert af de isolerede rør 1 og 2 består af et indre rør 3 omsluttet af et lag af isoleringsmateriale 4 og et ydre hylster 5. Det indre rør 3 er, som det fremgår af 20 fig. 1, blotlagt ved enden af de to rør 1 og 2. En rørbøjning 6 svarende til et indre rør og med en sådan krumning, at den passer til den vinkel, i hvilken rørene 1 og 2 skal samles, forbindes, eksempelvis ved svejsning eller på anden passende måde, med inderrøret 3 i det ene 25 rør 1. Et hylster 7, som kan bestå af eksempelvis et plastmateriale, påsættes rørbøjningen 6 og forskydes således, at den anden ende på rørbøjningen 6 bliver frit tilgængelig og kan forbindes med inderrøret 3 i det andet rør 2. Hylsteret 7 på rørbøjningen 6 forskydes der-30 efter mod dennes midte. En ved hver af rørenderne på hylsteret 5 påsat hylsterdel 8 trækkes derefter mod rørbøjningens 6 ender A,B og forbindes, eksempelvis ved hjælp af en varmekrympeforbindelse 9, med rørbøjningens 6 hylster 7· Gennem en åbning 10 i mindst den ene hylsterdel 35 8 indføres derefter isoleringsmateriale, således at rum met mellem rørbøjningens indre rør 6 samt de tilgrænsende indre rør 3 og det omsluttende hylster 7,8 udfyldes, hvorefter indføringsåbningen 10 lukkes.Each of the insulated tubes 1 and 2 consists of an inner tube 3 enclosed by a layer of insulating material 4 and an outer casing 5. The inner tube 3 is, as shown in FIG. 1, exposed at the end of the two pipes 1 and 2. A pipe bend 6 corresponding to an inner pipe and with such curvature as to fit the angle at which the pipes 1 and 2 are to be joined is connected, for example by welding or on another suitable way, with the inner tube 3 in one of the tubes 1. A sleeve 7, which may consist of, for example, a plastic material, is applied to the tube bend 6 and displaced so that the other end of the tube bend 6 becomes freely accessible and can be connected to the inner tube 3 in the second tube 2. The sleeve 7 on the tube bend 6 is then displaced toward its center. A sleeve portion 8 attached to each of the tube ends of the sleeve 5 is then pulled toward the ends A, B of the tube bend 6 and connected, for example, by a heat shrink joint 9, to the sleeve 7 of the tube bend 6 · Through an opening 10 in at least one sleeve portion 35 8 insulating material such that the space between the inner tube 6 of the tube bend and the adjacent inner tube 3 and the enclosing sleeve 7,8 is filled, after which the insertion opening 10 is closed.

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Ved en foretrukket udførelsesform trækkes den på hylsteret 5 påsatte og omsluttende hylsterdel 8 mod rørbøjningens 6 ender A,B på en sådan måde, at forbindelsen 9 med rørbøjningens hylster bliver beliggende i det væ- 5 sentlige over disse ender A,B. Af fig. 1 og 2 fremgår, til hvilken stilling A henholdsvis B den påsatte hylsterdel 8 udtrækkes.In a preferred embodiment, the sheath portion 8 enclosed on the sheath 5 is pulled against the ends A, B of the tube bend 6 in such a way that the connection 9 with the tube bend casings is substantially located above these ends A, B. In FIG. 1 and 2, it is evident to which position A and B respectively the attached sheath portion 8 is pulled.

Den på hylsteret 5 påsatte hylsterdel 8 kan forbindes med hylsteret 5 i den fra rørbøjningen 6 vendte ende ved 10 hjælp af eksempelvis en varmekrympeforbindelse 11.The sheath portion 8 mounted on the sheath 5 can be connected to the sheath 5 at the end turned away from the tube bend 6 by means of, for example, a heat shrink joint 11.

Denne forbindelse 11 kan udelades, når hylsterdelen 8 gives en sådan pasning med hylsteret 5, at en tilstrækkelig tætning opnås.This compound 11 may be omitted when the sheath portion 8 is provided such a fit with the sheath 5 that a sufficient seal is obtained.

Isoleringen kan udgøres af en plast, fortrinsvis 15 skumplast, som indsprøjtes gennem åbningen 10.The insulation may be constituted by a plastic, preferably 15 foam, which is injected through the opening 10.

Claims

150954 p atent requirements

A method of assembling heat-insulated pipes (1,2) at various angles, in particular heat pipes, which consists of an inner fluid-carrying pipe (3) and a surrounding layer (4) of heat-insulating material enclosed in a casing ( 5), whereby a tube bend (6) associated with the angle at which the tubes form, is suitably curved, for example by welding, with the inner tube (3) in one tube (1), a sleeve (7) having substantially the same curvature as the inner bend tube (6) of the tubular bend is fitted and displaced over the connected end (A) so that the other end (B) of the inner bend tube (6) of the bend becomes freely accessible and can be connected to the inner tube (3) of the other pipe (2), after which heat insulation material is introduced through an opening in the casing 15 (7) so that the space between the inner tube (6) of the pipe bend and the enclosing casing (7) is filled with thermal insulation material, whereby the introductory opening (10) is closed, characterized in that displacing the sleeve (7) on the tube bend (6) against that of the tube in the middle, after which a sleeve portion (8) mounted on each casing 20 of the casing (5) is pulled towards the ends (A, B) of the pipe bend (6) and is connected, for example by means of a heat shrinkage connection (9) with the pipe bend (6). sleeve (7), that the connection (9) with the sleeve (7) of the tube bend is substantially located over the joints (A, B) of the inner tubes (3).

Method according to claim 1, characterized in that the casing part (8) mounted on the casing (5) is connected to the casing (5) at the end turned away from the pipe bend (6), for example by means of a heat shrink joint (11).

Method according to claim 1 or 2, characterized in that a sheath part (8) mounted on the sheath (5) is used with such a fit with the sheath (5) that a sufficient seal is obtained.