NO784173L - PROCEDURE FOR THE PREPARATION OF PREFABRICATED BEND AND THE LIKE - Google Patents
PROCEDURE FOR THE PREPARATION OF PREFABRICATED BEND AND THE LIKEInfo
- Publication number
- NO784173L NO784173L NO784173A NO784173A NO784173L NO 784173 L NO784173 L NO 784173L NO 784173 A NO784173 A NO 784173A NO 784173 A NO784173 A NO 784173A NO 784173 L NO784173 L NO 784173L
- Authority
- NO
- Norway
- Prior art keywords
- parts
- folds
- cut
- bend
- cladding
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 7
- 238000005253 cladding Methods 0.000 claims description 13
- 238000009413 insulation Methods 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/28—Making tube fittings for connecting pipes, e.g. U-pieces
- B21C37/286—Making tube fittings for connecting pipes, e.g. U-pieces starting from sheet material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Description
Foreliggende oppfinnelse angår en fremgangsmåte til fremstilling av prefabrikerte rørbøyer for•flatebekledning av isolerte rør. Krumningsvinkelen på det isolerte røret kan være mellom 80° og l8o°. The present invention relates to a method for the production of prefabricated pipe bends for surface cladding of insulated pipes. The angle of curvature of the insulated pipe can be between 80° and 180°.
Ved transport .av væsker og gasser_i rør, der væsken eller gassene har forskjellig temperatur i'forhold til omgivelsen, forsyner man ofte rørene med et isolerende lag, samt utenpå dette en flatebekledning av metallplater for å beskytte den ofte lettskadelige isoleringen. Isolering og flatebekled--ning skjer som oftest etter at rørene er montert på plass og f.eks. trykkprøvd. På grunn av den ikke sjelden forekommende ildsfarlige omgivelsen får det ikke forekomme sterk'varme , gnister eller åpen ild i forbindelse med overflatebekledningen av rørene. Vanligvis fremstilles overflatebekledningen helt håndverksmessig og rørbøyene fremstilles i 6-8 deler av til-klippede platestrimler som falses sammen. Fremgangsmåten er tidskrevende og dyr, og flatebekledningen har en stor tendens til å krype sammen i de mange skjøtene. Det har nå overraskende vist seg at man kan fremstille flatebekledning som også inne-holder bøyer som er lette å fabrikere og kan påsettes på det allerede monterte røret ved hjelp av bare.en tang eller et annet verktøy for dikking av falsene. De prefabrikerte bøyene har også den fordel at bøyer med samme dimensjon kan benyttes for flere hosliggende krumningsradier på rørene, uten at iso-lerings^ j iktets tykkelse dermed minsker på noe sted. Ifølge oppfinnelsen plasserer man et rørformet mellomstykke mellom de to avkappede endene på flatebekledningen nærmest bøyen. Endene avkappes slik at de plane snittflatene er innbyrdes parallelle og like store. Den rørformede delen mellom snittflatene formes slik at tverrsnittet har samme elliptiske form som flatebekled-ningens avkappede ender. Derved oppnår man en bøy .med bare to skjøter, og der delene lett fabrikkmessig-kan fremstilles. When transporting liquids and gases in pipes, where the liquid or gases have a different temperature in relation to the surroundings, the pipes are often provided with an insulating layer, and on top of this a surface coating of metal sheets to protect the often easily damaged insulation. Insulation and surface cladding usually takes place after the pipes have been installed in place and, e.g. pressure tested. Due to the not infrequently occurring flammable environment, strong heat, sparks or open flames must not occur in connection with the surface coating of the pipes. Usually, the surface cladding is produced entirely by hand and the pipe bends are produced in 6-8 parts from cut-to-size sheet strips that are folded together. The procedure is time-consuming and expensive, and the cladding has a great tendency to shrink in the many joints. It has now surprisingly turned out that it is possible to produce surface cladding which also contains bends which are easy to manufacture and which can be applied to the already assembled pipe using only pliers or another tool for sealing the seams. The prefabricated bends also have the advantage that bends of the same dimension can be used for several adjacent radii of curvature on the pipes, without the thickness of the insulation being reduced anywhere. According to the invention, a tubular intermediate piece is placed between the two cut-off ends of the surface covering closest to the buoy. The ends are cut off so that the planar cut surfaces are mutually parallel and of the same size. The tubular part between the cut surfaces is shaped so that the cross section has the same elliptical shape as the cut ends of the surface cladding. This results in a bend with only two joints, and where the parts can easily be manufactured in a factory manner.
Oppfinnelsen skal i det følgende forklares nærmere The invention will be explained in more detail below
under henvisning til tegningen, der with reference to the drawing, there
fig. 1 viser et isolert og-flatebekledd rør i snitt. fig. 1 shows an insulated and surface-clad pipe in section.
.Fig. 2 viser et isolert og■flatebekledd rør med .Fig. 2 shows an insulated and surface-coated pipe with
bøy, sett fra siden, bend, side view,
fig. 3 viser den ene enden av den rette delen av fig. 3 shows one end of the straight part of
f latebekledningen mot rørbøyen,' f the sheet cladding against the pipe bend,'
fig. 4 viser en halvdel av det ellipséformede mellom-stykket i bøyen, og fig. 4 shows one half of the ellipsoidal intermediate piece in the buoy, and
fig. 5 viser .en enkel, stående fals, fig. 5 shows a simple, standing seam,
Ved flatebekledning av rørets rette deler prefabriker-er man platehalvdeler 1 med halvsirkulært tverrsnitt og med en slik radius at to slike halvdeler 1 sammen omslutter isola-sjonslaget 6. Samm.enføyingen av platehalvdelene 1 skjer ved hjelp av en enkel, stående fals 2. Platehalvdelene 1 forsynes med falser 2 før sammensetningen. Monteringen skjer nemlig slik at falsdelene 2 tres i hverandre ved aksiell forskyvning av platehalvdelene 1. For deretter å låse halvdelen 1 til hverandre, klemmes falsene 2 sammen med en tang.eller et lignende When surface cladding the straight parts of the pipe, plate halves 1 are prefabricated with a semicircular cross-section and with such a radius that two such halves 1 together enclose the insulation layer 6. The plate halves 1 are joined together by means of a simple, vertical seam 2. The plate halves 1 is supplied with rebates 2 before assembly. The assembly takes place in such a way that the folded parts 2 are threaded into each other by axial displacement of the plate halves 1. In order to then lock the halves 1 to each other, the folded parts 2 are clamped together with pliers or something similar
verktøy. I endene av falsene 2 foretar man også et mot falsenes lengderetning vinkelrett sintt 3 i . falsene 1--2 cm fra enden, og de dermed avskårne delene 4 av falsen brettes opp. Dermed forhindrer mån- fullstendig all glidning av falsdelene i forhold til hverandre. tool. At the ends of the folds 2, a seam 3 is also made perpendicular to the longitudinal direction of the folds. the folds 1--2 cm from the end, and the thus cut parts 4 of the fold are folded up. In this way, the moon completely prevents all sliding of the seam parts in relation to each other.
De på begge sider av bøyen tilsluttende delene, Those on both sides of the buoy connecting parts,
fig. 3, av flatebekledningen kappes av slik at plane og innbyrdes parallelle og likeformede snittflater dannes. • Disse snittflatene får ellipséform. En oppkraging 7- foretas rundt snitta flatene som deretter skal danne den indre delen av den enkle, stående falsen (fig. 5) ved sammenføyningen, med den i bøyen inngående mellomdelen 8. Avstanden mellom snittflatene skal avpasses slik at den elliptisk rørformede mellomdelen 8, som etterpå passes inn mellom snittflatene ikke innskrenker, rommet for isoleringen 6 rundt det indre røret 5. Mellomdelen 8, som hensiktsmessig fremstilles i to halvdeler og som deretter sammenføyes langs de to motstående generatriser ved hjelp av en fig. 3, of the surface cladding is cut off so that flat and mutually parallel and equally shaped cut surfaces are formed. • These cut surfaces take on an ellipse shape. A cantilever 7- is made around the cut surfaces which will then form the inner part of the simple, vertical seam (fig. 5) at the joint, with the middle part 8 included in the bend. The distance between the cut surfaces must be adjusted so that the elliptical tubular middle part 8, which is then fitted between the cut surfaces does not reduce the space for the insulation 6 around the inner tube 5. The intermediate part 8, which is conveniently produced in two halves and which is then joined along the two opposite generatrices by means of a
enkel stående fals 9, formes i de to endene til en krage 10 for sammenfalsing med flatebekledningen på begge sidene av bøyen. Alt montasjearbeide skjer deretter på plass ved.hjelp av en tang eller lignende. single vertical fold 9, is formed at the two ends into a collar 10 for folding with the surface cladding on both sides of the bend. All assembly work is then done in place with the help of pliers or similar.
Ut førelseseksempel: Implementation example:
Et damprør. 5 med en ytterdiameter på 100 mm ble forsynt med et isolasjonssjikt 6 hvis tykkelse var 50 mm. På damprøret 5 var det blant annet en rørbøy på 90°, hvis krum-ningsradie var 1,5 x damprørefs diameter, dvs. 150 mm. Hen-sikten var å beskytte isolas jonssj iktet 6 med en kappe, av 0} h mm', plastbelagt stålplate 1. Av 1 m lange og 325 rnm brede plate-remser ble det bøyd 1 m lange halvdeler som ble forberedt for sammenføyning -ved hjelp av en enkelt stående fals, fig. 5> Ved monteringen 'ble deretter den ene rørhalvdelenes falsdel skjøtt inn i den andre, hvoretter falsen 2 ble tettet ved hjelp av slagpåvirkning. For at isolasjonslagets. tykkelse ikke skulle bli forminsket i bøyen, ble de deler av flatebekledningen som skulle sammenføyes med mellomdelen 8 i bøyen fremstilt slik at avstanden mellom endene (fig. 3) etter monteringen ble 150 mm. Disse endene (fig. 3) ble forsynt med en enkel oppbukking 7. A steam pipe. 5 with an outer diameter of 100 mm was provided with an insulating layer 6 whose thickness was 50 mm. On the steam pipe 5 there was, among other things, a pipe bend of 90°, the radius of curvature of which was 1.5 x the diameter of the steam pipe, i.e. 150 mm. The purpose was to protect the insulating layer 6 with a sheath of 0} h mm', plastic-coated steel plate 1. From 1 m long and 325 nm wide plate strips, 1 m long halves were bent and prepared for joining -by using a single standing seam, fig. 5> During assembly, the seam part of one pipe half was then welded into the other, after which the seam 2 was sealed by impact. So that the insulation layer's. thickness was not to be reduced in the bend, the parts of the surface covering which were to be joined to the middle part 8 in the bend were produced so that the distance between the ends (fig. 3) after assembly was 150 mm. These ends (fig. 3) were provided with a simple bend 7.
En mellomdel ble fremstilt i to identiske halvdeler hvis lengder likeledes var 150 mm og som var forberedt for sammenfalsing dels innbyrdes og dels med den øvrige flatebekledningen. All-montering skjedde deretter på plass og-ved hjelp av bare en tang for sammensetting og låsing av falsene. Det forekom ikke elektriske motorer eller åpen ild ved monteringen, ettersom eksplosjonsfaren var stor. An intermediate part was produced in two identical halves whose lengths were also 150 mm and which were prepared for folding partly with each other and partly with the other surface cladding. All-assembly then took place in place and-using only a pair of pliers to assemble and lock the folds. There were no electric motors or open flames during assembly, as the risk of explosion was great.
Ved hjelp av.denne fremgangsmåten kunne samtlige deler fremstilles fabrikkmessig og det var bare nødvendig med monteringsarbeidet.inne på bruksstedet. Isolasjonslagets tykkelse kunne overalt bibeholdes på minimum 50 mm og'flatelaget viste seg å ha stor motstandskraft mot rystelser og mekanisk påvirkning. With the help of this method, all parts could be produced in a factory manner and only the assembly work was necessary at the place of use. The thickness of the insulation layer could be maintained everywhere at a minimum of 50 mm and the surface layer proved to have great resistance to vibrations and mechanical impact.
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7714344A SE7714344L (en) | 1977-12-16 | 1977-12-16 | METHOD OF MANUFACTURING PREFABRICED BOYS |
Publications (1)
Publication Number | Publication Date |
---|---|
NO784173L true NO784173L (en) | 1979-06-19 |
Family
ID=20333225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO784173A NO784173L (en) | 1977-12-16 | 1978-12-12 | PROCEDURE FOR THE PREPARATION OF PREFABRICATED BEND AND THE LIKE |
Country Status (4)
Country | Link |
---|---|
DK (1) | DK561978A (en) |
FI (1) | FI783840A (en) |
NO (1) | NO784173L (en) |
SE (1) | SE7714344L (en) |
-
1977
- 1977-12-16 SE SE7714344A patent/SE7714344L/en unknown
-
1978
- 1978-12-12 NO NO784173A patent/NO784173L/en unknown
- 1978-12-14 DK DK561978A patent/DK561978A/en unknown
- 1978-12-14 FI FI783840A patent/FI783840A/en unknown
Also Published As
Publication number | Publication date |
---|---|
FI783840A (en) | 1979-06-17 |
DK561978A (en) | 1979-06-17 |
SE7714344L (en) | 1979-06-17 |
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