DK164927B - SLEEVE CONNECTION TO HEAT-INSULATED WIRING PIPES - Google Patents
SLEEVE CONNECTION TO HEAT-INSULATED WIRING PIPES Download PDFInfo
- Publication number
- DK164927B DK164927B DK489083A DK489083A DK164927B DK 164927 B DK164927 B DK 164927B DK 489083 A DK489083 A DK 489083A DK 489083 A DK489083 A DK 489083A DK 164927 B DK164927 B DK 164927B
- Authority
- DK
- Denmark
- Prior art keywords
- sleeve
- plastic
- inner tube
- profile
- outer layers
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
- B29D23/003—Pipe joints, e.g. straight joints
- B29D23/005—Pipe joints, e.g. straight joints provided with electrical wiring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/16—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
- F16L59/18—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like adapted for joints
- F16L59/20—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like adapted for joints for non-disconnectable joints
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/54—Heating elements having the shape of rods or tubes flexible
- H05B3/56—Heating cables
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/54—Heating elements having the shape of rods or tubes flexible
- H05B3/56—Heating cables
- H05B3/565—Heating cables flat cables
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
- H05B2203/003—Heaters using a particular layout for the resistive material or resistive elements using serpentine layout
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
iin
DK 164927 BDK 164927 B
Opfindelsen angår en muffeforbindelse til varmeisolerede ledningsrør, der består af et medieførende inderrør, et varmeisolerende lag af opskummet plast, der omgiver inderrøret, og et yderlag af plast, hvor to af isolering frie ender af inderrør 5 er sammensvejst, og forbindelsesstedet er dækket af en på yderlagenes ender liggende muffe, og det ringformede mellemrum mellem muffen og de sammensvejsede inderrør er fyldt ud med opskummet materiale, og hvor muffen består af et over forbindelsesstedet formet plastbånd, der er svejst til enderne af 10 yderlagene og hen langs plastbåndets overlapningssøm ved hjælp af en meanderformet modstandstråd, der er indlejret i plastmaterialet, idet afstanden imellem meandervindi ngerne er i hovedsagen konstant.BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a sleeve connection for heat insulated conduits consisting of a medium conducting inner tube, a heat insulating layer of foamed plastic surrounding the inner tube, and an outer layer of plastic, wherein two insulation free ends of inner tube 5 are welded together and the connection site is covered by a on the ends of the outer layers, and the annular space between the sleeve and the welded inner tubes is filled with foamed material, and the sleeve consists of a plastic band formed over the connection point, welded to the ends of the outer layers and along the plastic band overlap seam. a meander-shaped resistance wire embedded in the plastic material, the distance between the meander windings being substantially constant.
15 Fra tysk brugsmønster nr. 8.204.372 kendes en muffeforbindelse, ved hvilken et muffelegeme i form af et plastbånd svejses til yderrørenes ender, idet svejsningen i plastbåndets overlapningsområde sker ved hjælp af et bånd, der kan opvarmes ad elektrisk vej. Båndet indeholder en meanderformet modstands-20 tråd, hvis vindinger holdes på plads ved hjælp af klæbebånd. I en anden udførelse er varmebåndet indsmeltet i kantområdet af plastbåndet. En ulempe ved en sådan muffeforbindelse er, at diameteren af modstandstråden, ved forbindelse af store rør, må være så stor, at der er risiko for, at der imellem de en-25 kelte meandervindinger ikke opnås en tilfredsstillende svejsning af mufffel egernet med yderlagene henholdsvis i overlapningsområdet af plastbåndet. Dertil kommer, at der via klæbebåndet kan indføres urenheder i svejsesømmen, således at svejsningen af de tilstødende lag ikke bliver helt tilfreds-30 stillende. For rør af stor diameter har indsmeltningen desuden den ulempe, at båndet bliver uhåndterligt som følge af store tråddiametre.From German usage pattern No. 8,204,372 there is known a socket connection in which a socket body in the form of a plastic band is welded to the ends of the outer tubes, the welding in the overlap area of the plastic band by means of a band which can be heated by electric path. The ribbon contains a meander-shaped resistance wire, the winding of which is held in place by adhesive tape. In another embodiment, the heat strip is fused to the edge region of the plastic strip. A disadvantage of such a sleeve connection is that the diameter of the resistance wire, in connection with large pipes, must be so large that there is a risk that between the individual meander turns there is not a satisfactory welding of the sleeve defect spokes with the outer layers respectively. in the overlap area of the plastic tape. In addition, impurities can be introduced into the weld seam via the adhesive tape, so that the welding of the adjacent layers does not become entirely satisfactory. In addition, for large diameter pipes, the melting has the disadvantage that the tape becomes unmanageable due to large wire diameters.
Formålet med opfindelsen er at tilvejebringe en muffeforbin-35 delse, der har en bedre svejsn i ng i over 1apni ngsområdet, og som også vil kunne anvendes til store rør.The object of the invention is to provide a socket joint which has a better weld in over the open area and which can also be used for large pipes.
DK 164927 BDK 164927 B
22
En muffeforbindelse af den indledningsvis nævnte art er ifølge opfindelsen ejendommelig ved, at der under overlapningssømmen findes en på yderlagenes ender liggende støtteskinne. Støtteskinnen sørger for det nødvendige modtryk under svejsningen og 5 muliggør derved en væsketæt svejsning i overlapningsområdet.According to the invention, a sleeve joint of the type mentioned initially is characterized in that during the overlap seam there is a support rail lying on the ends of the outer layers. The support rail provides the necessary back pressure during welding and thereby enables a liquid-tight weld in the overlap area.
Fremdeles kan ifølge opfindelsen støtteskinnen udgøres af en T-profil, der fortrinsvis er udført af tynd plade. Selv om T-profilet er let, er det alligevel tilstrækkeligt stift til at 10 kunne tilvejebringe det nødvendige modtryk under svejsningen.Still, according to the invention, the support rail can be constituted by a T-profile, which is preferably made of thin plate. Although the T-profile is light, it is nevertheless sufficiently rigid to provide the necessary back pressure during welding.
Endvidere kan ifølge opfindelsen såvel støtteskinnen som muffen være anbragt i ringformede recesser ved enderne af yderlagene. Muffeforbindelsen vil derved kunne flugte med yderlage-15 ne.Furthermore, according to the invention, both the support rail and the sleeve can be arranged in annular recesses at the ends of the outer layers. The sleeve connection will thereby be able to align with the outer layers.
Endelig kan ifølge opfindelsen foden af T-profilet være anbragt i noter i området af de ringformede recesser.Finally, according to the invention, the foot of the T-profile may be placed in notes in the region of the annular recesses.
20 Opfindelsen skal nærmere forklares i det følgende under henvisning til tegningen, hvor fig. 1 viser et kendt plastbånd, hvori der er indlejret en me-anderformet modtandstråd, 25 fig. 2 et plastbånd med en indlejret meanderformet modstandstråd til tilvejebringelse af en muffeforbindelse ifølge opfindelsen , 30 fig. 3 en illustration af, hvorledes det i fig. 2 viste plastbånd fremstilles, fig. 4 en muffeforbindelse ifølge opfindelsen, fremstillet ved hjælp af det fig. 2 viste plastbånd og 35 fig. 5 den i fig. 4 viste muffeforbindelse set i snit.The invention will be explained in more detail below with reference to the drawing, in which 1 shows a known plastic band embedded in a medium-sized receiving wire; FIG. 2 is a plastic band with an embedded meander-shaped resistance wire for providing a socket connection according to the invention; FIG. 3 is an illustration of how in FIG. 2, plastic bands are shown; FIG. 4 shows a sleeve connection according to the invention made by means of the FIG. 2 and 35 fig. 5 is the one shown in FIG. 4 is a sectional view of the sleeve connection.
DK 164927BDK 164927B
33
Til tilvejebringelse af en kendt muffeforbindelse er der anvendt et plastbånd 1, i hvilket der er indlejret en meander-formet modstandstråd - se fig. 1. Bredden af plastbåndet svarer til bredden af den meanderformede modstandstråd, medens 5 højden af plastbåndet 1 svarer til diameteren af modstandstrå-den 2.To provide a known sleeve connection, a plastic band 1 is used in which a meander-shaped resistance wire is embedded - see FIG. 1. The width of the plastic band corresponds to the width of the meander-shaped resistance wire, while the height of the plastic band 1 corresponds to the diameter of the resistance wire 2.
I fig. 2 er bredden af plastbåndet 1 imidlertid mindre end bredden af den meanderformede modstandstråd 2, således at en-10 derne af modstandstråden 2 rager ud til siden af plastbåndet 1. For at der kan være tilstrækkelig meget plast til de svejsninger, som vil blive beskrevet i det følgende, er højden af plastbåndet 1 større end diameteren af modstandstråden 2. Under en svejsn i ng flyder materialet af plastbåndet 1 under ind-15 virkning af et tryk ud til siderne og udfylder derved hulrummet ved enderne 3 af modstandstråden 2.In FIG. 2, however, the width of the plastic band 1 is smaller than the width of the meander-shaped resistance wire 2, so that the ends of the resistance wire 2 protrude to the side of the plastic band 1. In order that there may be sufficient plastic for the welds which will be described in In the following, the height of the plastic band 1 is greater than the diameter of the resistance wire 2. During a weld, the material of the plastic band 1 flows under the influence of a pressure to fill the cavity at the ends 3 of the resistance wire 2.
Fremstillingen af det fig. 2 viste plastbånd vil blive beskrevet under henvisning til fig. 3. På et bræt 4 anbringes to 20 rækker af stifter 5 med samme indbyrdes afstand. Mellem ræk kerne af stifter 5 indlægges et første plastbånd la. Derefter føres en modstandstråd 2 rundt om stifterne 5, således at der dannes en meander med samme afstand imellem de enkelte vindinger. Et andet plastbånd Ib, som i ydre mål svarer til det før-25 ste plastbånd la, lægges derefter ovenpå den meanderformede modstandstråd 2, og der tilføres et ensartet tryk i pilens 3 retning. Ved tilførsel af en elektrisk strøm til modstandstråden 2, opvarmes denne og trænger derefter ind i plastbåndene la, lb. Svejseforløbet fortsætter, indtil plastbåndene la, lb 30 er sammensvejst. De sammensvejste bånd trækkes derefter af stifterne 5 og anvendes til fremstilling af en muffeforbindelse 10 - se fig. 4.The preparation of the FIG. 2 will be described with reference to FIG. 3. On a board 4, two 20 rows of pins 5 are spaced apart. A first plastic band 1a is inserted between the rows of pins 5. Then, a resistor wire 2 is passed around the pins 5 so that a meander is formed with the same distance between the individual turns. A second plastic band 1b, which in external dimensions corresponds to the first plastic band 1a, is then laid on top of the meander-shaped resistance wire 2 and a uniform pressure is applied in the direction of the arrow 3. By supplying an electric current to the resistor wire 2, it is heated and then penetrates into the plastic bands 1a, 1b. The welding process continues until the plastic strips la, lb 30 are welded together. The welded strips are then pulled by the pins 5 and used to make a socket joint 10 - see FIG. 4th
Til fremstilling af kortere bånd til muffeforbindelser af rør 35 af mindre diameter, udnyttes kun stifterne over en kortere længde.For the manufacture of shorter strips for sleeve connections of smaller diameter pipes 35, only the pins over a shorter length are utilized.
DK 164927 BDK 164927 B
44
Ved hjælp af afstanden imellem stifterne 5, fastlægges afstanden imellem meandervindingerne. Afstanden imellem meandervin-dingerne ligger, afhængigt af diameteren af modstandstråden 2, fortrinsvis mellem 3 og 8 mm.By means of the distance between the pins 5, the distance between the meander turns is determined. The distance between the meander turns is, depending on the diameter of the resistance wire 2, preferably between 3 and 8 mm.
55
Bredden af meandervindingerne andrager, afhængigt af diameteren af modstandstråden 2, mellem 20 og 60 mm. Plastbåndet kan anbringes omkring et yderlag af et rør, uden at afstanden imellem meandervindingerne ændres.Depending on the diameter of the resistor wire 2, the width of the meander turns is between 20 and 60 mm. The plastic band can be placed around an outer layer of a pipe without changing the distance between the meander turns.
10 I fig. 4 og 5 er det vist, hvorledes et plastbånd kan anvendes til fremstilling af en muffeforbindelse til varmeisolerede ledningsrør. Ledningsrøret har et medieførende inderrør 7, der fortrinsvis består af stål. Inderrøret 7 er omgivet af en 15 skumstof i sol ering 8, der udgøres af polyurethan. Skumstofiso-leringen 8 er omgivet af et ydre lag 9, der fortrinsvis udgøres af plast, eksempelvis polyethylen. To af isolering frie ender af inderrør 7 er sammensvejst ved 17. Forbindelsesstedet er dækket af en på yderlagenes 9 ender liggende muffe 10 i 20 form af et plastbånd, der er svejst til enderne af yderlagene og hen langs plastbåndets 10 langsgående overlapningssøm 13. Under den langsgående overlapningssøm 13 af det på yderlagenes 9 ender liggende bånd 10 er anbragt en støtteskinne i form af en T-profil 11. 12 er den perifere svejsesøm. 14 er polyure- 25 thanskum, der tjener til isolering af de sammensvejsede ender af inderrørene 7.10 In FIG. 4 and 5, it is shown how a plastic band can be used to make a socket connection for heat insulated conduits. The conduit has a media conducting inner tube 7 which is preferably made of steel. The inner tube 7 is surrounded by a foam of solder 8 made of polyurethane. The foam insulation 8 is surrounded by an outer layer 9 which is preferably made of plastic, for example polyethylene. Two insulation-free ends of inner tube 7 are welded together at 17. The junction site is covered by a sleeve 10 located on the ends of the outer layers 9 in the form of a plastic band welded to the ends of the outer layers and along the longitudinal overlap seam of the plastic band 10. longitudinal overlap seam 13 of the strip 10 lying on the outer layers 9 is provided with a support rail in the form of a T-profile 11. 12 is the peripheral weld seam. 14 is polyurethane foam which serves to insulate the welded ends of the inner tubes 7.
Muffeforbindelsen fremstilles på følgende måde: 30 Først tilvejebringes ved hjælp af et egnet værktøj, ved enderne af yderlaget 9 en langs randen forløbende reces 15. I området af recessen 15 tilvejebringes derefter en i inderrøret 7's retning forløbende not 16, eksempelvis ved hjælp af en skillesav, hvis dybde i det mindste svarer til T-profilen's 35 li fod. Derefter sammensvejses enderne af inderrørene 7 (ved 17), og T-profilen 11 indføres i noterne 16. Der, hvor der skal tilvejebringes en perifer svejsesøm 12, indlægges enThe sleeve connection is prepared as follows: First, by means of a suitable tool, at the ends of the outer layer 9, a recess 15 extending along the rim is provided. In the region of the recess 15, a groove 16 extending in the direction of the inner tube 7 is provided, for example by means of a separating saw. , whose depth at least corresponds to the 35-l foot of the T-profile. Then, the ends of the inner tubes 7 (at 17) are welded and the T-profile 11 is inserted into the grooves 16. Where a peripheral welding seam 12 is to be provided, a
Claims (5)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19828230424U DE8230424U1 (en) | 1982-10-29 | 1982-10-29 | SOCKET CONNECTION FOR HEAT-INSULATED PIPES |
| DE8230424 | 1982-10-29 | ||
| DE3300943 | 1983-01-13 | ||
| DE19833300943 DE3300943A1 (en) | 1983-01-13 | 1983-01-13 | Electrically heatable strip for producing a sleeve connection for thermally-insulated pipelines |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| DK489083D0 DK489083D0 (en) | 1983-10-25 |
| DK489083A DK489083A (en) | 1984-04-30 |
| DK164927B true DK164927B (en) | 1992-09-07 |
| DK164927C DK164927C (en) | 1993-01-25 |
Family
ID=25807529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK489083A DK164927C (en) | 1982-10-29 | 1983-10-25 | SLEEVE CONNECTION TO HEAT-INSULATED WIRING PIPES |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH662874A5 (en) |
| DK (1) | DK164927C (en) |
| FI (1) | FI833953A (en) |
| FR (1) | FR2535570A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3604972C2 (en) * | 1986-02-17 | 1997-06-19 | Kabelmetal Electro Gmbh | Socket connection for thermally insulated conduits |
| DE8629512U1 (en) * | 1986-11-05 | 1986-12-18 | kabelmetal electro GmbH, 3000 Hannover | Socket connection for thermally insulated pipes |
| DE3702726A1 (en) * | 1987-01-30 | 1988-08-11 | Kabelmetal Electro Gmbh | SOCKET CONNECTION FOR HEAT-INSULATED PIPES |
| DE3831623A1 (en) * | 1988-09-17 | 1990-03-22 | Dillinger Stahlbau | METHOD FOR CONNECTING REMOTE HEATING PIPES |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1078950A (en) * | 1952-08-13 | 1954-11-24 | Manufacturing process for flexible electrothermal surfaces | |
| DE2011179A1 (en) * | 1970-03-10 | 1971-09-23 | Mcguire A | Electric heating plate and process for its manufacture |
| US3744823A (en) * | 1971-03-01 | 1973-07-10 | Shaw Pipe Ind Ltd | High temperature pipeline joints |
| DE2321569A1 (en) * | 1973-04-28 | 1974-11-14 | Tuerk & Hillinger Kg | ELECTRIC FLAT RADIATOR |
| EP0008912B1 (en) * | 1978-09-01 | 1984-01-04 | Ube Industries, Ltd. | Heat shrinkable covers |
-
1983
- 1983-06-09 FR FR8309607A patent/FR2535570A1/en not_active Withdrawn
- 1983-10-10 CH CH550983A patent/CH662874A5/en not_active IP Right Cessation
- 1983-10-25 DK DK489083A patent/DK164927C/en not_active IP Right Cessation
- 1983-10-28 FI FI833953A patent/FI833953A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| DK489083A (en) | 1984-04-30 |
| FI833953A (en) | 1984-04-30 |
| CH662874A5 (en) | 1987-10-30 |
| DK489083D0 (en) | 1983-10-25 |
| DK164927C (en) | 1993-01-25 |
| FR2535570A1 (en) | 1984-05-04 |
| FI833953A0 (en) | 1983-10-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUP | Patent expired |