DK151463B - INSULATION CAPS FOR PIPES, ISAIR REMOVAL CONDITIONS, AND PROCEDURES FOR MAKING SEGMENTS FOR SUCH AN INSULATION CAP - Google Patents
INSULATION CAPS FOR PIPES, ISAIR REMOVAL CONDITIONS, AND PROCEDURES FOR MAKING SEGMENTS FOR SUCH AN INSULATION CAP Download PDFInfo
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- DK151463B DK151463B DK287383A DK287383A DK151463B DK 151463 B DK151463 B DK 151463B DK 287383 A DK287383 A DK 287383A DK 287383 A DK287383 A DK 287383A DK 151463 B DK151463 B DK 151463B
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- segments
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- inner shell
- coupling
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/1228—Joining preformed parts by the expanding material
- B29C44/1242—Joining preformed parts by the expanding material the preformed parts being concentric
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- 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
- F16L59/153—Arrangements for the insulation of pipes or pipe systems for flexible pipes
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- 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
- F16L59/185—Adjustable joints, joints allowing movement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/14—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
Description
151463 ’151463 '
OISLAND
Den foreliggende opfindelse angår en isoleringskappe til rør, især fjernvarmeledninger, hvilken kappe består af til hinanden tilsluttelige og i forhold til hinanden vinkelstillelige segmenter af opskummet, 5 varmeisolerende materiale, især polyurethanhårdskum, hvilke segmenter fortrinsvis er omgivet af et fleksibelt hylsterrør eller en fleksibel hylsterslange, samt en fremgangsmåde til fremstilling af segmenter til en sådan isoleringskappe.The present invention relates to an insulating sheath for pipes, in particular district heating lines, which sheath consists of interconnected and mutually adjustable segments of foamed thermal insulating material, in particular polyurethane hard foam, which segments are preferably surrounded by a flexible casing or flexible casing hose. and a method of manufacturing segments for such an insulating jacket.
10 Især til fleksible, varmeisolerede medieledninger, som de finder anvendelse til fjernvarme, er det allerede blevet foreslået at isolere medierør af plastmateriale, eksempelvis tværbundet polyethylen, med et plastmaterialeskum, der omslutter medierøret. Som medierør anvendes ved siden af plast-15 materialer ligeledes kobberrør eller blødtjernsrør. Den varmeisolerende ledning skal herved kunne anvendes til forbindelse af fordelerstationer med hustilslutninger. I sådanne fordelerstationer bliver det fra fjernvarmeledninger, der i regelen består af stål eller lignende materiale, under højt tryk tilførte 20 varmemedium trykaflastet i høj grad og blandet med koldt vand til indstilling af temperaturer under 100°C, hvorpå transporten sker til hustilslutningerne under væsentligt formindsket tryk, i regelen et tryk fra 2 til 5 bar. Tidligere blev der til området mellem fordeler og hustilslutninger ligeledes anvendt 25 stål- eller støbegodsrør, idet sådanne ledninger lægges under jordoverfladen og derfor må råde over en tilsvarende stor trykstyrke. Lægningen af sådanne rør kan imidlertid kun ske med begrænset længde af de enkelte rørstykker, så at der til de ofte lange forbindelser mellem fordelerne·;og.hustilslutningerne 30 kræves et stort antal rørforbindelser og fittings. Sådanne rørforbindelser fordyrer lægningen af disse ledninger væsentligt og frembyder derudover et ekstra isoleringsproblem.10 Especially for flexible, heat insulated media lines which they use for district heating, it has already been proposed to insulate media tubes of plastic material, for example cross-linked polyethylene, with a plastic material foam enclosing the media tube. Copper tubes or soft-iron tubes are also used as media tubes in addition to plastic materials. The heat-insulating cable must hereby be used to connect distribution stations with house connections. In such distribution stations, from high-pressure lines, which usually consist of steel or similar material, under high pressure, high pressure relief is applied to the heating medium and mixed with cold water to set temperatures below 100 ° C, whereby the transport to the house connections is substantially reduced. pressure, usually a pressure from 2 to 5 bar. Previously, in the area between distributor and housing connections, 25 steel or casting pipes were also used, such wires being laid below the ground surface and therefore having a correspondingly high compressive strength. However, the laying of such pipes can only take place with a limited length of the individual pipe pieces, so that for the often long connections between the distributors and housing connections 30 a large number of pipe connections and fittings are required. Such pipe connections significantly distribute the laying of these conduits and additionally present an additional insulation problem.
Fra DE-offentliggørelsesskrift nr.From DE publication publication no.
2.413.133 kendes et bøjeligt flerlagsrør af plast, 35 som består af en tværbundet polyolefin og en ydre skummater ialebeklædning. Skummaterialebeklædningen er ved disse rør på ingen måde beskyttet mod komprimering i radial retning, så der sikres ikke en tilfredsstillende isolering ved læg- 22,413,133 is known a flexible multilayer plastic tube 35, which consists of a cross-linked polyolefin and an outer foam material of alloy coating. The foam material coating is by no means protected against compression in the radial direction, so that a satisfactory insulation is not ensured by laying 2
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151463 ning under jordoverfladen. Der kendes yderligere fra DE-offentlig-•gør.elsesskrift nr*- 2.236.375, et flerlagsrrfr, som har en indre polyolefinkappe, eksempelvis af polybuten. Denne indre kappe er forbundet med en ydre polyamidkappe til forbed-5 ring af den mekaniske og termiske belastning. Dette kendte rør er imidlertid ikke udformet som isoleret medieledning. Derudover er et sådant rør på grund af den stive forbindelse af den ydre kappe med det indre rør ikke fleksibelt i et til opvikling egnet omfang.151463 below ground level. Further known from DE Publication No. * - 2,236,375, a multilayer tube having an inner polyolefin sheath, for example of the polybutene. This inner sheath is connected to an outer polyamide sheath to improve the mechanical and thermal load. However, this known tube is not designed as an isolated media conduit. In addition, due to the rigid connection of the outer sheath to the inner tube, such a tube is not flexible to an extent suitable for winding.
10 Med henblik på forbedring af fleksibiliteten og på formindskelse af fremstillingsomkostningerne for sådanne rør er det blevet foreslået at underopdele den isolerende kappe i sig til hinanden sluttende segmenter, som skydes på medierøret, og som omgives af et hylsterrør eller en 15 hylsterslange. Hængsling af de enkelte segmenter til hinanden tillader en vinkelstilling af akserne for segmenterne i forhold til hinanden. Ved disse kendte segmenter drejer det sig i det væsentlige om cylindriske, opskummede afsnit, som ved vinkelstilling af nabosegmenter i forhold 20 til hinanden med deres inderkanter betinger en formindskelse af gennemgangstværsnitslysningen for medierøret og med deres yderkanter en forøgelse af tværsnitslysningen af hylsterrøret. Den på denne måde nødvendige overdimensionering af både hylsterrøret og tværsnitslysningen af den isole-25 rende kappe medfører ved en given yderdiameter af hylsterrøret en forringelse af varmeisoleringsværdien i forhold til i sammenhæng skumlagte, fleksible ledninger. Derudover bliver de isolerende segmenter, der betstår af polyurethanhårdskum, ved deres berøringssteder med nabosegmenter ved en vinkel-30 drejning af den samlede rørledning i stort omfang belastet mekanisk, så at materialet til isoleringskappen må vælges forholdsvis tæt og dermed har ringere varmeisoleringsværdier end sammenligningsvis lettere skummateriale med ringere mekanisk belastningsevne.In order to improve the flexibility and to reduce the manufacturing cost of such pipes, it has been proposed to subdivide the insulating sheath into adjacent segments which are slid onto the media tube and which are surrounded by a casing tube or casing tube. Hinging the individual segments to one another allows angular positioning of the axes of the segments relative to each other. In these known segments, these are essentially cylindrical foamed sections which, when angled adjacent neighboring segments 20 to each other with their inner edges, decrease the cross-sectional illumination of the media tube and with their outer edges an increase of the cross-sectional illumination of the casing tube. The over-dimensioning of both the sleeve tube and the cross-sectional illumination of the insulating sheath thus required, at a given outer diameter of the sleeve tube, causes a decrease in the heat insulation value compared to foamed flexible conduits. In addition, the insulating segments made of polyurethane hard foam at their contact points with neighboring segments at an angular rotation of the entire pipeline are largely mechanically loaded, so that the material of the insulating jacket must be selected relatively tight and thus have poorer thermal insulation values than comparatively lighter foam material. with inferior mechanical load capacity.
35 Formålet for opfindelsen er at tilvejebringe en isole ringskappe af den indledningsvis nævnte art, som ved mindre diameter af segmenterne muliggør en bøjning af det af segmenterneThe object of the invention is to provide an insulating sheath of the type mentioned at the beginning, which at smaller diameter of the segments enables a bending of that of the segments.
OISLAND
3 151463 omsluttede rør og en vinkelstilling af segmenterne i forhold til hinanden, uden at der kræves en større indvendig diameter af hylsterrøret end den diameter, der svarer til segmenternes største diameter. Ifølge opfindelsen skal der således 5 tilvejebringes en isoleringskappe, der ved mindst mulige yderdimensioner frembyder gunstige varmeisoleringsegenskaber.3 151463 enclosed tubes and an angular position of the segments relative to one another without requiring a larger internal diameter of the casing than the diameter corresponding to the largest diameter of the segments. According to the invention, there is thus to be provided an insulating sheath which, at the least possible outer dimensions, presents favorable heat insulation properties.
Til opnåelse af dette formål består opfindelsen i det væsentlige i, at segmenternes inderflade og yderflade er udformet som omdrejningslegemer med krumme frembringere 10 og i det væsentlige har tøndeformet facon, og at segmenterne med enderne har koblingsled til den vinkelstillelige tilslutning til nabosegmenterne. Ved den i det væsentlige tøndeformede facon af yderfladen fremkommer der ved en indbyrdes vinkelstilling af to sig til hinanden slut-15 tende segmenter intet behov for en forøgelse af den indvendige diameter af hylsterrøret eller hylsterslangen. Sådanne hylsterrør eller hylsterslanger kan på særlig enkel måde bestå af bølget polyvinylchlorid, fortrinsvis slagsejt poly-vinylchlorid, eller polyetnylen og beskytte yderkappen af 20 de isolerende segmenter mod mekanisk beskadigelse uden at påvirke oprulleligheden og dermed forenklingen af lægningen.In order to achieve this object, the invention consists essentially in that the inner surface and the outer surface of the segments are formed as rotary bodies with curved generators 10 and have essentially barrel-shaped shape and that the segments with the ends have coupling joints for the angular connection to the neighboring segments. In the substantially barrel-shaped shape of the outer surface, at an angular position of two adjacent segments there is no need for an increase in the inner diameter of the casing or casing. Such sleeve tubes or sleeve hoses may in particularly simple manner consist of wavy polyvinyl chloride, preferably impact tough polyvinyl chloride, or polyethylene and protect the outer casing of the insulating segments from mechanical damage without affecting the rollability and thus simplification of the lay.
Ved den foretrukne udformning af enderne af disse segmenter med en inderflade, der udvider sig konisk udad, fremkommer der kun ringe mekanisk belastning af medierøret ved en vinkel-25 stilling af segmenterne, og frem for alt lettes indføringen af medierøret eller -rørene i segmenterne. Medieledningen eller -ledningerne i det indre af segmenterne kan herved ligge an imod den ligeledes i det væsentlige tøndeformede inderflade af de vinkelstillelige segmenter svarende til 30 krumningsforløbet af fjernvarmeledningen eller et lignende rør.In the preferred design of the ends of these segments with an inner surface extending tapered outwardly, little mechanical loading of the media tube is obtained at an angular position of the segments and, above all, the introduction of the media tube or tubes into the segments is facilitated. The media conduit (s) in the interior of the segments may thereby abut against the likewise substantially barrel-shaped inner surface of the angular segments corresponding to the curvature of the district heating conduit or a similar pipe.
For at kunne anvende et isoleringsskum med ringe rumvægt vælges udformningen fortrinsvis således, at segmentets inderflade er udformet som en skal eksempelvis af 35 metal, især aluminium, eller af plastmateriale, især et med en reflekterende maling eller reflekterende pigmenter forsynet plastmateriale, hvilken skal er forbundet med koblingsleddenePreferably, in order to use a low-space-weight insulation foam, the design is chosen such that the inner surface of the segment is formed as a shell, for example, of metal, especially aluminum, or of plastic material, especially a reflective paint or pigmented plastic material which is to be connected. with the connectors
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151463 4 til den vinkelstillede tilslutning af nabosegmenter. Segmenternes mekaniske styrke sikres herved i høj grad af den af skallen dannede inderflade af segmentet, og denne inder-flade kan være udformet i ét stykke med de i tilsvarende mod-5 stykker i nabosegmenterne sammenlåselige koblingsled,- hvorved der også sikres et vist mål af trækstyrke. Til yderligere forbedring af varmeisoleringsegenskaberne kan denne inderflade være udformet varmereflekterende. Anvendelsen af en sådan støtteskal som inderflade muliggør, at kappen, 10 der omgiver segmentets inderflade, kan bestå af opskummet poly- urethanhårdskum med lukkede porer og en rumvægt fra 35 til 60 kg/m3.151463 4 for the angular connection of neighboring segments. The mechanical strength of the segments is hereby greatly ensured by the inner surface of the segment formed by the shell, and this inner surface can be integrally formed with the coupling joints interlockable in corresponding counterparts - thereby also ensuring a certain measure of tensile strength. To further improve the heat insulation properties, this inner surface may be designed to be heat reflective. The use of such a support shell as an inner surface enables the sheath 10 surrounding the inner surface of the segment to consist of foamed polyurethane hard foam with closed pores and a room weight of 35 to 60 kg / m3.
Segmentet har fortrinsvis ved begge ender hinanden omsluttende kugleformede hhv. hulkugleformede koblings-15 led. Ved med hinanden ledforbundne segmenter omslutter det hulkugleformede koblingsled herved det kugleformede koblingsled,· hvorved segmenterne let kan vinkelstilles i forhold til hinanden. Ved en foretrukken udførelsesform for opfindelsen er også segmentets yderflade dannet af 20 en skal, idet den yderfladen dannende ydre skal og den inderfladen dannende indre skal omslutter det opskummede materiale til alle sider. På denne måde tilvejebringes en beskyttelse af segmentet mod mekanisk beskadigelse udefra. Det opskummede materiale beskyttes af den ydre skal mod 25 sollys og fugtighed, og herved forøges levetiden for plast mater ialeskuramet. Ved at skummaterialet, indvendigt og udvendigt er omsluttet af plastskaller, undgås i tilfælde af rørbrud indtrængning af fugtighed i skummet. Isoleringen bliver i så tilfælde ikke beskadiget, og det er nu muligt 30 let at udtrække røret eller slangen, som skal isoleres, af seg menterne og forny dette eller denne. Ved ledninger, som er nedlagt i jorden, gøres gravearbejder til udbedring af skaden i vidt omfang overflødige.The segment preferably has spherical orbital at each end, respectively. hollow spherical coupling 15 joints. In the case of interconnected segments, the hollow spherical coupling joint thus encloses the spherical coupling joint, whereby the segments can be easily angled relative to each other. In a preferred embodiment of the invention, the outer surface of the segment is also formed by a shell, the outer surface forming outer shell and the inner surface forming the inner shell enclosing the foamed material on all sides. In this way, protection of the segment is provided against mechanical damage from the outside. The foamed material is protected by the outer shell against 25 sunlight and humidity, thereby increasing the life of the plastic material in the scalar. The foam material, inside and outside, is enclosed by plastic shells, in the event of pipe breakage, moisture penetration into the foam is avoided. In this case, the insulation is not damaged, and it is now possible to easily remove the tube or hose to be insulated from the segments and renew this or this. In the case of wires laid in the ground, excavation works to repair the damage are largely redundant.
Herved er fortrinsvis den ydre skal og den indre 35 skal dannet af adskilte og i hinanden indskudte dele, hvor ved der fremkommer en enkel konstruktion og fremstillingsmåde.Hereby, preferably, the outer shell and the inner 35 are formed of separate and interposed parts, whereby a simple construction and method of manufacture are obtained.
OISLAND
5 1514635 151463
Ifølge en foretrukken udførelsesform er arrangementet herved valgt således, at det omsluttede koblingsled sammen med den ydre skal udgør en første del, at det omsluttede koblingsled sammen med den indre skal udgør 5 en anden del, at den indre skal rager ind i det omslut tende koblingsled under frigivelse af et mellemrum til det opskummede materiale, og at den ydre skal omslutter det omsluttende koblingsled under frigivelse af et mellemrum til det opskummede materiale. På denne måde bliver hvert 10 koblingsled for sig forbundet med en skal, så at der opnås en stærk ledforbindelse af segmenterne med hinanden, og der opnås også i området for disse koblingsled en varmeisolering ved det opskummede materiale.According to a preferred embodiment, the arrangement is hereby selected such that the enclosed coupling joint together with the outer shell constitutes a first part, that the enclosed coupling joint together with the inner shell constitutes a second part for the interior to project into the enclosing coupling joint. during release of a spacer to the foamed material and the exterior to enclose the enclosing coupling joint during release of a spacer to the foamed material. In this way, every 10 coupling joints are individually connected to a shell, so that a strong joint connection of the segments is achieved with each other, and a thermal insulation is also achieved in the foamed material in the region of these coupling joints.
Ifølge opfindelsen kan udformningen være valgt 15 således, at den ydre skal ved den frie endeflade af det om sluttede koblingsled omslutter den indre skal og ved den frie ende af det omsluttende koblingsled støder stumpt sammen med den indre skal. De to skaller kan således på enkel måde stikkes ind i hinanden, idet den nøjagtige stilling af 20 de to skaller i forhold til hinanden er fikseret ved, at den ydre skal ved den ene endeflade omslutter den indre skal, så at der fremkommer et hulrum, der kan udfyldes med skum, og en unøjagtig sammensætning af de to skaller forhindres.According to the invention, the design may be selected such that the outer shell at the free end surface of the enclosed coupling joint encloses the inner shell and at the free end of the enclosing coupling joint bluntly with the inner shell. Thus, the two shells can be easily inserted into each other, the exact position of the two shells relative to each other being fixed in that the outer shell at one end surface encloses the inner shell so that a cavity is formed. which can be filled with foam and an inaccurate composition of the two shells is prevented.
Som materiale til den indre og ydre skal kan anvendes 25 termoplastisk plastmateriale, fortrinsvis polypropylen.As a material for the inner and outer shell can be used thermoplastic plastic material, preferably polypropylene.
Den indre og ydre skal kan også være udformet i ét stykke med hinanden, idet fremstillingen i så fald kan ske på enkel måde ved blæsning eller sintring i en form. Det fremkomne hulrum kan derpå udfyldes med skum.The inner and outer shells can also be integrally formed, in which case the manufacturing can be done simply by blowing or sintering in a mold. The resulting cavity can then be filled with foam.
30 Fremstillingen af segmenter til en isoleringskappe ifølge opfindelsen, ved hvilke segmenter kun inderfladen er udformet som skal, kan ved fremgangsmåden ifølge opfindelsen ske på en særlig enkel måde ved, at der i en første arbejdsgang udformes en inderskal med krumme frembringere og i det væ-35 sentlige tøndeformet udformning samt koblingsstykker på denneThe manufacture of segments for an insulating jacket according to the invention, in which segments only the inner surface is designed to be, can be carried out in a particularly simple way in the method according to the invention by forming an inner shell with curved generators in the first operation. 35 late barrel shaped designs and couplings on it
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6 151463 inderskal, fortrinsvis i ét stykke med denne, og at der derpå under anvendelse af inderskallen som formkerne påskummes plastmateriale på denne. Den inderfladen dannede skal tjener herved som støttelegeme og formkerne for påskumningen af isole-5 ringskappen, og der kan herved i en første arbejdsgang også drages omsorg for udformningen af de ønskede koblingsstykker.6, 141463, preferably in one piece with the latter, and then using the inner shell as the mold core, foam material is foamed thereon. The inner surface formed hereby serves as the supporting body and the mold core for the foaming of the insulating sheath, and in the first operation, care can also be taken to design the desired couplings.
På særlig enkel måde kan inderskallen fremstilles ved blæsning af plastmateriale i en form, med.hvilken også koblingsdelene udformes, idet enderne af den på denne måde fremstillede 10 inderskal forlænges. For at kunne udforme inderskallen med ringe vægtykkelse går man fortrinsvis således frem, at inderskallen under opskumningen holdes under og understøttes af et indvendigt tryk, især ved indblæsning af trykluft.In a particularly simple manner, the inner shell can be made by blowing plastic material into a mold, with which also the coupling parts are formed, the ends of the inner shell thus produced being extended. In order to be able to design the inner shell with a low wall thickness, it is preferably carried out so that the inner shell during the foaming is maintained and supported by an internal pressure, especially when supplying compressed air.
På denne måde sikres en del af den nødvendige understøtnings-15 kraft under opskumningen af trykluften eller et lignende trykmedium. Efter hærdningen af skummet og især efter afkølingen har også en tilsvarende tyndere inderskal den nødven-*· dige styrke til at forhindre beskadigelse af skumkappen.In this way, a portion of the required support force is secured during the foaming of the compressed air or a similar pressure medium. After curing of the foam and especially after cooling, a corresponding thinner also has the necessary strength to prevent damage to the foam jacket.
Fremgangsmåden ifølge opfindelsen til fremstilling 20 af et segment med inderskal og yderskal er i det væsentlige kendetegnet ved, at den ydre skal påsættes over den indre skal, og at mellemrummet mellem de to skaller gennem en fortrinsvis i den ydre skal tilvejebragt åbning udfyldes med plastskum, eksempelvis polyurethanhårdtskum med lukkede porer. Skallerne 25 danner således udvendigt og indvendigt selv forlorne formdele, og den form, i hvilken opskumningen sker, bliver ikke berørt af plastmaterialet. En påføring af et formskillemiddel i formen er således overflødig, og den besværlige rengøring af formen for påklæbede skumrester efter hver formning bortfalder.The method of the invention for the preparation of a segment of inner shell and outer shell is substantially characterized in that the outer shell is applied over the inner shell and that the space between the two shells through a preferably in the outer shell is filled with plastic foam. for example, polyurethane hard foam with closed pores. The shells 25 thus form outer and inner molded parts themselves and the mold in which the foaming occurs is not affected by the plastic material. Thus, application of a mold separating agent to the mold is superfluous and the cumbersome cleaning of the mold for adhesive foam residue after each molding lapses.
30 Herved kan ifølge opfindelsen den ydre skal, ligesom det var tilfældet med den indre skal, fremstilles ved blæsning af plastmateriale i en form, med hvilken også koblingsdelene udformes.Hereby, according to the invention, the outer shell, as was the case with the inner shell, can be made by blowing plastic material in a mold with which the coupling parts are also formed.
På lignende måde kan man også gå frem, når inder- og yderskal-len består af ét stykke.Similarly, one can also proceed when the inner and outer shells consist of one piece.
35 Opfindelsen skal i det følgende beskrives nærmere ud fra udførelsesformer, idet der henvises til tegningen, på hvilkenThe invention will now be described in more detail from embodiments, with reference to the drawing, in which
OISLAND
7 151463 fig. 1 viser et aksialsnit gennem et segment med inderskal, fig. 2 hængslingen af to til hinanden sluttede segmenter af den i fig. 1 viste art til fremstilling af en isolerings-5 kappe ifølge opfindelsen til rør, fig. 3 et aksialsnit gennem et segment med yder-og inderskal, fig. 4 i større målestok det omsluttende koblingsled i fig. 3, og 10 fig. 5 i større målestok det omsluttede koblingsled i fig. 3.7 FIG. 1 shows an axial section through an inner shell segment; FIG. 2 shows the hinge of two adjacent segments of the one shown in FIG. 1 to produce an insulating jacket according to the invention for pipes; FIG. 3 is an axial section through an outer and inner shell segment; FIG. 4 shows, on a larger scale, the enclosing coupling joint of FIG. 3 and 10 in FIG. 5 shows, on a larger scale, the enclosed coupling link in FIG. Third
I fig. 1 er gengivet et segment 1, som har en i det væsentlige tøndeformet inderflade 2' samt en i det væsentlige tøndeformet yderflade 3. Inderfladen er dannet 15 af tæt, ved blæsning i en form fremstillet plastmateriale og har nær sine ender i områderne a og b koniske afsnit, der udvider sig i retning udad. I ét stykke med inder-skallen 2 er udformet koblingsdele 4 og 5. Det blæste plastmateriale frembyder herved et støttelegeme for påføring af ΛΛ skummet og danner samtidig en diffusionsbarriere. På inder-skallen 2 er påskummet et med 6 betegnet polyurethanhårdskum o med en rumvægt på 35 til 60 kg/m , idet den tøndeformede yderkontur er udformet ved hjælp af en tilsvarende form.In FIG. 1, a segment 1 is shown which has a substantially barrel-shaped inner surface 2 'and a substantially barrel-shaped outer surface 3. The inner surface is formed of a dense, plastic material made of blow molding and has near its ends in the regions a and b tapered sections that extend outwards. In one piece with the inner shell 2, coupling parts 4 and 5 are formed. The blown plastic material thereby provides a support body for the application of the ΛΛ foam and at the same time forms a diffusion barrier. On the inner shell 2, the foam is a polyurethane hard foam 6, designated 6, having a weight of 35 to 60 kg / m, the barrel-shaped outer contour being formed by a similar shape.
Som det fremgår af fig. 2, kan akserne 7 for naboseg-As shown in FIG. 2, the axes 7 for neighboring
At menter 1-vinkelstilles i forhold til hinanden, uden at dette kræver en større inderdiameter af hylsterslangen 8. Der kan således i en hylsterslange 8 med forud fastlagt inderdiameter i sammenligning med cylindriske isoleringssegmenter rummes mere isolerende skum, hvorved varmeisoleringsegenskaberne 30 forbedres. Ved udformningen af segmenterne med en støttende inderskal 2 kan der vælges et mekanisk mindre stabilt og termisk bedre isolerende, lettere skum som materiale til det isolerende segment, idet også de mekaniske kræfter ved koblingsstederne optages umiddelbart af inderskallen 2's materiale 35 under formindskelse af den mekaniske belastning af den isolerende skumkappe 6. Koblingsleddene 4 og 5 kan derved være udformet således, at de efter at være stukket ind i hinanden o 8 151463 sammenlåses med hinanden/ så at der sikres en vis trækstyrke. Især sikrer denne mekaniske trækstyrke mod, at der ved vinkelstilling af nabosegmenter 1 i forhold til hinanden fremkommer en forøgelse af afstanden mellem nabosegmenterne og dermed 5 et mere eller mindre stort, ikke isoleret mellemrum.Ments 1 are angled relative to each other without requiring a larger inner diameter of the casing hose 8. Thus, in a casing hose 8 of predetermined inner diameter, in comparison with cylindrical insulation segments, more insulating foam can be accommodated, thereby improving the thermal insulation properties 30. In designing the segments with a supporting inner shell 2, a mechanically less stable and thermally better insulating, lighter foam can be selected as material for the insulating segment, since also the mechanical forces at the coupling sites are absorbed immediately by the material 35 of the inner shell 2, reducing the mechanical load. of the insulating foam sheath 6. The coupling joints 4 and 5 may thereby be designed so that after being inserted into each other they are interlocked with each other / so as to ensure a certain tensile strength. In particular, this mechanical tensile strength ensures that, at angular position of neighboring segments 1 relative to each other, an increase in the distance between the neighboring segments and hence 5 ensures a more or less large, not isolated gap.
Inderskallen kan være beklædt med en aluminiumfolie eller forsynet med en maling eller pigmenter, der forbedrer refleksionen. Som medierør, der ikke er gengivet på tegningen, kan anvendes blødtjernsrør, bølgerør, kobber-10 rør, tværbundne polyethylenrør eller lignende rør. Hylsterrøret 8 er udformet fleksibelt, eksempelvis bølget, og kan bestå af polyvinylchlorid eller polyethylen. For at sikre den nødvendige støttefunktion som formkerne for påføringen af polyurethanhård-skummet kan inderskallen 2 være udformet som blæseemne med 15 en vægtykkelse på ca. 1 mm. Med sådanne segmenter kan en krumningsradius for den isolerende ledning på ca. 1,8 m uden videre realiseres.The inner shell may be coated with an aluminum foil or provided with a paint or pigments to enhance reflection. As media tubes not shown in the drawing, soft iron tubes, corrugated tubes, copper tubes, cross-linked polyethylene tubes or similar tubes may be used. The casing 8 is flexible in shape, for example wavy, and may consist of polyvinyl chloride or polyethylene. In order to ensure the necessary supporting function as the mold core for the application of the polyurethane hard foam, the inner shell 2 can be formed as a blow blank having a wall thickness of approx. 1 mm. With such segments, a radius of curvature of the insulating conduit of approx. 1.8 m is realized without further ado.
Den i fig. 3, 4 og 5 viste udførelsesform adskiller sig fra den i fig. 1 og 2 viste i det væsentlige ved, at isole-20 ringsskummet er omsluttet af to skaller.The FIG. 3, 4 and 5 differ from that of FIG. 1 and 2 showed essentially that the insulating foam is enclosed by two shells.
11 er segmentets ydre skal og 12 er dets indre skal. Koblingen er udformet som sfærisk kobling med et kugleformet koblingsled 13, som omsluttes af et hulkugleformet koblingsled 14. Det omsluttede koblingsled 13 består sammen med den 25 ydre skal 12 af ét stykke, og det omsluttende koblingsled 14 består sammen med den indre skal 11 af ét stykke. De to skaller 11 og 12 er stukket ind i hinanden. Den ydre skal 12 omslutter som vist i fig. 5 ved endesiden af det omsluttede koblingsled 13 den indre skal 11 med en indad ragende 30 rand 16. Ved den frie endeflade 17 af det omsluttende koblings-J.ed 14 har som vist i større mådestok i fig. 4 den indre skal 11 en udad ragende rand 18 og den ydre skal 12 en indad ragende rand 19, så at de to skaller støder stumpt mod hinanden ved 20.11 is the outer shell of the segment and 12 is its inner shell. The coupling is designed as a spherical coupling with a spherical coupling joint 13, which is enclosed by a hollow spherical coupling joint 14. The enclosed coupling joint 13 consists of the one outer shell 12 of one piece, and the enclosing coupling joint 14 consists of one inner shell 11. piece. The two shells 11 and 12 are tucked into each other. The outer shell 12 encloses as shown in FIG. 5 at the end side of the enclosed coupling joint 13, the inner shell 11 with an inwardly projecting 30 rim 16. At the free end surface 17 of the enclosing coupling joint 14, as shown on a larger scale in FIG. 4, the inner shell 11 has an outwardly projecting rim 18 and the outer shell 12 an inwardly projecting rim 19 so that the two shells bluntly abut each other at 20.
35 Mellemrummet mellem den indre skal 11 og den ydre skal 12 er udfyldt med en plastskumfyldning 21. Mellem den omsluttende koblingsdel 14, den indre skal 11 og den ydre skal 12The gap between the inner shell 11 and the outer shell 12 is filled with a plastic foam filling 21. Between the enclosing coupling part 14, the inner shell 11 and the outer shell 12
OISLAND
9 151463 findes et mellemrum 22. Mellem den omsluttede koblingsdel 13, den ydre skal 12 og den indre skal 11 findes et mellemrum 23. Mellemrummene 22 og 23 er ligeledes udfyldt med plastskum, så at der også i området for koblingsdelene 3 og 4 tilveje-5 bringes en god. varmeisolation.A gap 22. There is a gap 22. Between the enclosed coupling part 13, the outer shell 12 and the inner shell 11 there is a gap 23. The spaces 22 and 23 are also filled with plastic foam, so that in the area of the coupling parts 3 and 4 there is also provided. 5 brought a good. heat insulation.
Claims (13)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT241882 | 1982-06-22 | ||
| AT241882A AT374576B (en) | 1975-06-05 | 1982-06-22 | SEGMENT FOR AN INSULATING SHEATH AND METHOD FOR THE PRODUCTION THEREOF |
| AT197583A AT378840B (en) | 1983-05-30 | 1983-05-30 | SEGMENT FOR AN INSULATING SHEATH AND METHOD FOR THE PRODUCTION THEREOF |
| AT197583 | 1983-05-30 |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| DK287383D0 DK287383D0 (en) | 1983-06-21 |
| DK287383A DK287383A (en) | 1983-12-23 |
| DK151463B true DK151463B (en) | 1987-12-07 |
| DK151463C DK151463C (en) | 1988-08-15 |
Family
ID=25597320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK287383A DK151463C (en) | 1982-06-22 | 1983-06-21 | INSULATION CAPS FOR PIPES, ISAIR REMOVAL CONDITIONS, AND PROCEDURES FOR MAKING SEGMENTS FOR SUCH AN INSULATION CAP |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0097640B1 (en) |
| DE (1) | DE3361062D1 (en) |
| DK (1) | DK151463C (en) |
| FI (1) | FI77314C (en) |
| HU (1) | HU187923B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202021104279U1 (en) * | 2021-08-10 | 2023-03-28 | REHAU Industries SE & Co. KG | Covering device for covering a connection point of media-carrying pipe end sections |
| DE202021104281U1 (en) * | 2021-08-10 | 2023-03-28 | REHAU Industries SE & Co. KG | Covering device for covering a connection point of media-carrying pipe end sections |
| DE202021104278U1 (en) * | 2021-08-10 | 2022-12-12 | REHAU Industries SE & Co. KG | Covering device for covering a connection point of media-carrying pipe end sections |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE62953C (en) * | W. WOLFF SEN. in Berlin | Flexible pipe made from external unfl! inner rotatably riveted pipe sections. (Zusai7 to patent no. 58726.) | ||
| US3095337A (en) * | 1961-07-10 | 1963-06-25 | Gen Foam Plastics Corp | Semicylindrical foam elastomer insulation shell |
| DE1212370B (en) * | 1962-08-03 | 1966-03-10 | Avica Equip | Flexible metallic tubular pipe to accommodate flexible hoses, cables or the like. |
| DE2236375A1 (en) * | 1972-07-25 | 1974-02-07 | Technoform Caprano U Brunnhofe | Plastic pipes for hot water - with polyolefin inner layer and polyamide outer layer |
| FR2225681B1 (en) * | 1973-04-13 | 1976-05-21 | Pont A Mousson | |
| NL176833C (en) * | 1973-04-26 | 1985-06-17 | Draegerwerk Ag | HEAT-INSULATING FLEXIBLE PIPE. |
| DE2541373A1 (en) * | 1975-09-17 | 1977-03-31 | Joachim Dipl Chem Dr Steffens | Continuous pipe lagging prodn. - by foaming between films in two adjacent semicircular sections and folding sections together |
-
1983
- 1983-06-16 HU HU832151A patent/HU187923B/en not_active IP Right Cessation
- 1983-06-17 DE DE8383890100T patent/DE3361062D1/en not_active Expired
- 1983-06-17 EP EP83890100A patent/EP0097640B1/en not_active Expired
- 1983-06-21 DK DK287383A patent/DK151463C/en not_active IP Right Cessation
- 1983-06-21 FI FI832267A patent/FI77314C/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE3361062D1 (en) | 1985-11-28 |
| HUT34596A (en) | 1985-03-28 |
| HU187923B (en) | 1986-03-28 |
| FI832267A0 (en) | 1983-06-21 |
| DK287383D0 (en) | 1983-06-21 |
| FI77314C (en) | 1989-02-10 |
| FI832267L (en) | 1983-12-23 |
| EP0097640A1 (en) | 1984-01-04 |
| EP0097640B1 (en) | 1985-10-23 |
| FI77314B (en) | 1988-10-31 |
| DK151463C (en) | 1988-08-15 |
| DK287383A (en) | 1983-12-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ATS | Application withdrawn | ||
| AHB | Application shelved due to non-payment | ||
| PBP | Patent lapsed |