DK150392B

DK150392B - Method and mantle for coating a pipeline fitting

Info

Publication number: DK150392B
Application number: DK91982A
Authority: DK
Inventors: Baerge Jensen
Original assignee: Topo Cap Unit A S
Priority date: 1982-03-03
Filing date: 1982-03-03
Publication date: 1987-02-16
Also published as: DK91982A; DK150392C

Description

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Opfindelsen vedrører en fremgangsmåde til omhylning af et rørledningsarmatur med en kappe, som ifølge opfindelsen kan tjene såvel som et varmeisolerende lag omkring rørledningsarmaturet samt som en transportemballage for 5 armaturet.The invention relates to a method of enclosing a pipe fitting with a sheath which according to the invention can serve as well as a heat insulating layer around the pipe fitting and as a transport packaging for the fitting.

Specielt varmeisoleringen af sådanne armaturer har i takt med de stigende energipriser tiltrukket sig stigende opmærksomhed, især i forbindelse med store ventiler, som har et stort overfladeareal. Sådanne ventiler findes i stort 10 antal i f.eks. fjernvarmeledninger, hvor det har vist sig, at energitabene fra en enkelt ventil kan løbe op i nærheden af kr. 1.000,- på årsbasis.In particular, the heat insulation of such luminaires has attracted increasing attention, especially with large valves having a large surface area, in line with rising energy prices. Such valves are found in large numbers in e.g. district heating lines, where it has been found that the energy losses from a single valve can run up to close to DKK 1,000, - on an annual basis.

Foruden varmetabene er der også problemer med korrosion af armaturer, såsom ventiler, pumper m.v. I tilfælde af, at en 15 rørledning fører et meget koldt medium, vil der blive afsat kondens på armaturet, som derved tæres, men en tæring af armaturer for varme medier forekommer også i stor udstrækning, f.eks. i fjernvarmesystemer, hvor armaturerne er anbragt i en underjordisk brønd. De varme armaturer medfø-20 rer nemlig, at varm og fugtig luft stiger til vejrs og kondenserer på undersiden af brønddækslet, hvorfra vandet drypper ned på armaturerne.In addition to the heat losses, there are also problems with corrosion of fittings, such as valves, pumps, etc. In the event that a pipeline leads to a very cold medium, condensation will be deposited on the luminaire, which is thereby corroded, but a corrosion of luminaires for hot media also occurs to a large extent, e.g. in district heating systems where the fixtures are housed in an underground well. The hot fittings cause hot and humid air to rise and condense on the underside of the well cover, from which the water drips onto the fittings.

Fra beskrivelsen til tysk offentliggørelsesskrift nr.From the description to German publication no.

19 41 452 kendes der midler til varmeisolering af ventiler.19 41 452 means for heat insulating valves are known.

25 Ved denne kendte teknik presses et par klodser af efter-giveligt materiale så kraftigt omkring ventilen, at· denne indtrykkes halvvejs i hver af klodserne. For at dette kan lade sig gøre i praksis især ved store ventiler, er det endvidere nødvendigt at blødgøre det eftergivelige materiale 30 ved en kraftig opvarmning.In this prior art, a pair of resilient material is pressed so tightly around the valve that it is pressed halfway into each of the blocks. In addition, in order for this to be possible in practice especially with large valves, it is necessary to soften the resilient material 30 by vigorous heating.

Den ovennævnte kendte teknik har den ulempe, at den kun ved stort besvær lader sig udføre i praksis. Når der f.eks. skal arbejdes i en mørk og snæver brønd, er det vigtigt, at montagen kan foregå så hurtigt som muligt og ved hjælp af så 2 150392 lidt værktøj som muligt. Ved den kendte metode er et specielt spændeværktøj nødvendigt, hvilket er besværligt at arbejde med under vanskelige forhold, og det kan endvidere være nødvendigt at skulle medbringe udstyr til op-5 varmning af isolationsmaterialet.The above-mentioned prior art has the disadvantage that it can only be carried out in practice with great difficulty. For example, when If you need to work in a dark and narrow well, it is important that the assembly can be done as quickly as possible and with the help of as little tool as possible. In the known method, a special clamping tool is necessary, which is difficult to work with in difficult conditions, and it may also be necessary to bring equipment for heating the insulating material.

Formålet med opfindelsen er at angive en fremgangsmåde til omhylning af et rørledningsarmatur, hvor de ovennævnte ulemper er undgået, og hvorved der samtidigt opnås en omhyl-ning, der kan tjene som transportemballage af armaturet.The object of the invention is to provide a method for enclosing a pipeline luminaire where the above-mentioned drawbacks are avoided, while at the same time obtaining a enclosure which can serve as transport packaging of the luminaire.

10 Dette formål opnås ved, at fremgangsmåden udføres som angi vet i krav l's kendetegnende del, idet de nævnte skålformede skaller kan anbringes og fastgøres ved hjælp af selv-låsende spændebånd uden brug af specialværktøj. Ved at en tilpas stor overflade af kappens indre ligger direkte 15 an mod armaturets ydre overflade kan kappen have tilstræk kelig bæreevne til at kunne understøtte armaturet og således beskytte dette under transport. Det vil herefter kunne forstås, at det også er væsentligt, at kappen ifølge opfindelsen kan demonteres og remonteres'flere gange, hvilket 20 heller ikke er muligt med den ovennævnte kendte teknik.This object is achieved by carrying out the method as set forth in the characterizing part of claim 1, wherein said cup-shaped shells can be mounted and secured by self-locking straps without the use of special tools. By having a suitably large surface of the interior of the sheath directly adjacent to the outer surface of the luminaire, the sheath may have sufficient bearing capacity to support the luminaire and thus protect it during transport. It will then be understood that it is also essential that the sheath according to the invention can be removed and remounted several times, which is also not possible with the aforementioned prior art.

Hvis den kendte isolering kun er presset hårdt sammen omkring en ventil, vil materialets elasticitet medføre, at det i klodserne indtrykkede hulrum delvist forsvinder, når klodserne fjernes fra ventilen, således at der atter skal 25 bruges et specielt spændeværktøj for at remontere klodser ne. I tilfælde af at klodserne er bibragt et mere formstabilt hulrum ved opvarmning, vil smeltning af materialet som følge af opvarmningen medføre en fastklæbning til ventilen, således at klodserne ikke kan demonteres uden at blive øde-30 lagt.If the known insulation is only pressed tightly around a valve, the elasticity of the material will cause the cavity pressed into the blocks to partially disappear when the bricks are removed from the valve, so that a special clamping tool must be used to reassemble the bricks. In the event that the bricks are provided with a more mold-stable cavity upon heating, melting of the material as a result of the heating will cause an adhesion to the valve so that the bricks cannot be dismantled without being destroyed.

Krav 2 angiver foretrukne materialeegenskaber, hvor det vil kunne forstås, at trykfastheden kan være mindre i tilfælde af et relativt let armatur, og at der kan vælges andre formstoffer med den ønskede isolerings- og bæreevne.Claim 2 specifies preferred material properties where it will be appreciated that the compressive strength may be less in the case of a relatively light fixture and that other moldings having the desired insulation and bearing capacity can be selected.

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Opfindelsen vedrører endvidere en kappe til brug ved udøvelse af den omhandlede fremgangsmåde til omhylning af et rørledningsarmatur og af den fra USA patentskrift nr. 2 390 632 kendte art. Den kendte kappe samvirker 5 imidlertid kun periferisk med rørledningsarmaturet, hvorfor den ved sin montage må holdes af i det mindste én hånd, indtil koblingsorganer til at sammenkoble kappens dele er anbragt. Samtidigt er den kendte kappe u-egnet som transportemballage for rørledningsarmaturet, 10 da den periferiske berøring ved kraftige påvirkninger af kappen med rørledningsarmaturet vil deformere kappen, så dens isolerende egenskaber nedsættes. Kappen ifølge opfindelsen er ejendommelig ved den i krav 3's kendetegnende del angivne udformning, hvorved de nævnte 15 ulemper undgås. Den kendte kappe er endvidere vanskelig at fremstille, specielt i små dimensioner, og kan ikke tilskæres eller opdeles i flere skaller, hvilket er nødvendigt, hvis adgangsforholdene er meget begrænsede.The invention further relates to a sheath for use in the practice of the present method for enclosing a pipeline fitting and of the kind known from US Patent No. 2,390,632. However, the known casing 5 only cooperates circumferentially with the piping fixture, and therefore, during its assembly, it must be held by at least one hand until coupling means for interconnecting the casing parts are arranged. At the same time, the known casing is unsuitable as transport packaging for the pipeline fixture, as the peripheral contact due to strong influences of the casing with the pipeline fixture will deform the casing so that its insulating properties are reduced. The sheath according to the invention is characterized by the design according to the characterizing part of claim 3, thereby avoiding said disadvantages. Furthermore, the known jacket is difficult to manufacture, especially in small dimensions, and cannot be cut or divided into several shells, which is necessary if access conditions are very limited.

Som anført i krav 4 kan kappen strække sig et stykke forbi 20 tilslutningsorganer på armaturet, hvilket medfører den fordel, at kappen omslutter rørledningens koblingsflange og kan strække sig helt hen til rørledningens isolation. Tilslutningsorganerne er typisk koblingsflanger, men kan også være pressefittings, svejsekraver m.v. Den nævnte 25 forlængelse medfører endvidere den fordel, at de i krav 5 angivne, pladeformede skaller, som udgør en del af transportemballagen, let kan fastgøres.As stated in claim 4, the casing may extend a distance past 20 connecting means on the fixture, which has the advantage that the casing encloses the coupling flange of the pipeline and can extend all the way to the pipeline insulation. The connecting means are typically coupling flanges, but can also be press fittings, welding collars, etc. The said extension further has the advantage that the plate-shaped shells as defined in claim 5, which form part of the transport packaging, can be easily attached.

De i krav 6 angivne feder- og notorganer letter den korrekte positionering af skallerne under monteringen, men 30 kunne også tænkes at bidrage til den indbyrdes sammenkobling af skallerne. Fortrinsvis holdes skallerne på plads ved hjælp af de i krav 7 angivne spændebånd, som kan ligge direkte an mod skumplasten, da skallerne ikke skal klemmes og deformeres omkring armaturet, men passer til dette 35 og blot skal holdes fast på udløselig måde.The spring and groove members of claim 6 facilitate the correct positioning of the shells during assembly, but 30 could also be conducive to the interconnection of the shells. Preferably, the shells are held in place by means of the straps as claimed in claim 7, which can be directly against the foam plastic, since the shells are not to be squeezed and deformed around the luminaire, but fit to this and only have to be held in a releasable manner.

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Krav 8 angiver foretrukne enkeltheder ved en speciel ud-førelsesform, hvor det nævnte låg let kan aftages for smøring, eftersyn og indstilling af ventilen. Derved kan der opnås en kappe med en ensartet varmeisoleringsevne uden 5 overflødigt materiale, som kan vanskeliggøre montagen.Claim 8 indicates preferred details of a particular embodiment, wherein said lid can be easily removed for lubrication, inspection and adjustment of the valve. Thereby, a sheath with a uniform heat insulation capability can be obtained without excess material, which can make installation difficult.

Opfindelsen vil blive nærmere forklaret ved den følgende beskrivelse af en udførelsesform, idet der henvises til tegningen, hvor fig. 1 skematisk viser en ventil og et par kappehalvdele 10 ifølge opfindelsen, medens fig. 2 skematisk viser den færdigmonterede kappe ifølge opfindelsen.The invention will be explained in more detail by the following description of an embodiment, with reference to the drawing, in which fig. 1 schematically shows a valve and a pair of jacket halves 10 according to the invention, while FIG. 2 is a diagrammatic representation of the pre-assembled sheath according to the invention.

I det følgende vil der som eksempel på et rørledningsarmatur blive anvendt den på fig. 1 viste ven-15 til 1, som har en ventilspindel 4 samt koblingsflanger 2, .3. Fig. 1 viser endvidere et par kappehalvdele 5, 6, som udgør en udførelsesform for kappen ifølge opfindelsen. Endvidere er der vist et endedæksel 7 og et låg 8. De nævnte dele er på fig. 1 20 vist i adskilt stilling, medens fig. 2 skematisk viser kappen monteret på ventilen, som i den ene ende er forbundet til et isoleret stykke rørledning 9.In the following, as an example of a piping fixture, the one shown in FIG. 1, having a valve spindle 4 and coupling flanges 2, .3. FIG. 1 further shows a pair of jacket halves 5, 6 which constitute an embodiment of the jacket according to the invention. Furthermore, an end cover 7 and a cover 8. are shown. 1 20 in a separate position, while FIG. 2 schematically shows the casing mounted on the valve, which at one end is connected to an insulated piece of pipeline 9.

Ved den viste udførelsesform er kappen fremstillet i form af de to halvparter 5, 6, som er identiske, så-25 ledes at kappen kan støbes i en enkelt form, som. er tilpasset ventilen 1 således, at kappens indre i det væsentlige ligger tæt an mod ventilens ydre overflade.In the embodiment shown, the sheath is made in the form of the two half portions 5, 6, which are identical, so that the sheath can be molded in a single mold which. is adapted to the valve 1 such that the interior of the sheath is substantially adjacent to the outer surface of the valve.

Anlægsfladerne mellem halvparterne 5 og 6 er forsynet med komplementære styreorganer såsom det ved 10 30 betegnede fremspring og de ved 11 og 12 betegnede huller. Halvparterne er endvidere forsynet med rundt-gående spor 13, 14 for optagelse af spændebånd, som 5 150392 er wist ved henholdsvis 15 og 16 på fig. 2. Endelig er der på halvparten 5 antydet en lomme 17 for optagelse af mærkesedler i forbindelse med en forsendelse eller til optagelse af seviceoptegnelser for en i 5 drift værende ventil. Det på tegningen viste isolerende låg 8 er indrettet til at kunne presses ned over den åbne studs i kappen, hvor ventilspindelen 4 er beligende, således at der er let adgang for justering, smøring og eftersyn af ventilen. Låget 8 er forsynet 10 med en markering 18, som når låget anbringes på kappen, kan bringes til at flugte med markeringer 19, som repræsenterer forskellige ventilstillinger, således at den faktiske ventilstilling kan aflæses ude fra, uden at det er nødvendigt at fjerne låget 8.The abutment surfaces between the half-parts 5 and 6 are provided with complementary control means such as the projections indicated at 10 and the holes designated at 11 and 12. The half-parts are further provided with circumferential grooves 13, 14 for receiving straps which are wiped at 15 and 16 respectively in FIG. 2. Finally, at half 5, a pocket 17 is indicated for picking up banknotes in connection with a shipment or for recording sevice records for a valve operating in 5. The insulating lid 8 shown in the drawing is arranged to be pressed down over the open studs in the casing, where the valve stem 4 is located, so that there is easy access for adjustment, lubrication and inspection of the valve. The lid 8 is provided with a marking 18 which, when the lid is placed on the sheath, can be flush with markings 19 which represent different valve positions, so that the actual valve position can be read from without having to remove the lid 8 .

15 Det på fig. 1 viste endedæksel 7 kan, når kappen tjener som transportemballage, være indpresset i det hul i kappen, som er defineret ved forlængelser 20, 21 · af halvparterne henholdsvis 5 og 6, således at der ikke trænger urenheder ind i ventilen. Endedækslet 7 er 20 forsynet med de på fig. 1 med stiplet streg viste brud-anvisninger, således at endedækslet kan knækkes langs en diameter og således, at et større eller mindre midterparti kan fjernes, således at der bliver en todelt ring tilbage, hvis ydre diameter som nævnt passer ind i for-25 længelserne 20, 21, og hvis indvendige diameter svarer til den udvendige diameter af isoleringen omkring rør-stykket 9. Denne isolationsring 7A kan herefter anbringes som vist på fig. 2, hvorved der opnås en fuldstændig indeslutning af armaturet og de tilhørende koblings-30 flanger, idet forlængelserne 20, 21 naturligvis er tilstrækkeligt store. Disse forlængelser fremstilles normalt så store, at der i praksis kan forekomme en afskæring i afhængighed af, hvor tæt rørstykkets isolation strækker sig hen til rørstykkets koblingsflange.15 The embodiment of FIG. 1, when the sheath serves as transport packaging, 1 can be pressed into the hole in the sheath defined by extensions 20, 21 · of the half-parts 5 and 6, respectively, so that no impurities enter the valve. The end cover 7 is provided with those shown in FIG. 1 with broken dashes shown so that the end cap can be broken along a diameter and so that a larger or smaller center portion can be removed, leaving a two-part ring whose outer diameter as mentioned fits into the extensions 20, 21, the inside diameter of which corresponds to the outside diameter of the insulation around the pipe piece 9. This insulation ring 7A can then be applied as shown in FIG. 2, whereby a complete enclosure of the luminaire and the associated coupling flanges is obtained, the extensions 20, 21 being of course sufficiently large. These extensions are usually made so large that, in practice, a cut-off may occur, depending on how close the insulation of the pipe piece extends to the coupling flange of the pipe piece.

Alternativt kan endedækslet 7's ydre diameter svare til den ydre diameter af forlængelserne 20, 21, i hvil- 6 150392 ket tilfælde endedækslet 7 vil være forsynet med et fremspring, som passer ind i det af forlængelserne definerede hul, hvorved forlængelserne kan gøres kortere samtidigt med, at endedækslet 7 omslutter isolationen 5 omkring rørstykket 9.Alternatively, the outer diameter of the end cover 7 may correspond to the outer diameter of the extensions 20, 21, in which case the end cover 7 will be provided with a protrusion which fits into the hole defined by the extensions, whereby the extensions may be shortened simultaneously with the end cover 7 encloses the insulation 5 around the pipe piece 9.

Ved hjælp af de beskrevne midler kan der opnås en fuldstændig isolering og beskyttelse af et armatur, hvilken beskyttelse især er fordelagtig under transport og oplagring af ventilen. Monteringsarbejdet kan foregå væ- 10 sentligt hurtigere end hidtil kendt, idet der blot kan være behov for et skæreværktøj for tilpasning af kappens længde. Såfremt pladsforholdene er meget snævre, og det viser sig vanskeligt at få anbragt de på tegningen viste halvparter 5 og 6, kan en halvpart gennemskæres på 15 langs, hvorefter spændebåndene 15, 16 stadig kan fastholde den nu tredelte kappe. Skærefladerne kan om nødvendigt blive påført en vandtæt hinde. Der er således med opfindelsen åbnet mulighed for en meget effektiv og billig transportemballage og isolering 20 af rørledningsarmaturer, som foruden den viste ventil kan omfatte pumper, strømningsmålere med videre.By means of the described means, a complete isolation and protection of a luminaire can be obtained, which protection is particularly advantageous during transport and storage of the valve. The mounting work can take place significantly faster than previously known, since only a cutting tool may be needed to adjust the length of the sheath. If the space conditions are very narrow, and it turns out to be difficult to place the halves 5 and 6 shown in the drawing, a half can be cut in length 15, after which the clamping straps 15, 16 can still hold the now three-piece sheath. If necessary, the cutting surfaces can be applied to a waterproof membrane. The invention thus provides for a very efficient and inexpensive transport packaging and insulation of piping fittings which, in addition to the valve shown, may include pumps, flow meters and so on.

Claims

Patent Claims:

Method for enclosing a pipe fitting with a casing, characterized in that the casing is molded as at least two bowl-shaped shells (5, 6) 5 of foamed plastic and that the shells are placed around the fixture (1) and fixed in a removable manner for this purpose. by means of coupling means (15, 16) enclosing the sheath, wherein the inner surface of the shells is designed to be complementary to the external surface of the luminaire, at least within areas of sufficient area to bear the luminaire's compressive strength, weight.

Process according to claim 1, characterized in that polyurethane foam having a weight of at least 50 kg / m is used as a plastic material.

A casing for enclosing a piping fixture which is for use in carrying out the method of claim 1, characterized in that the casing consists of at least two molded shells (5, 6, 7) foamed as provided arranged on the armature (1) to be able to enclose its outer surface, the shells having an inner surface which is at least partially complementary to the outer surface of the luminaire and the sheath having releasable coupling means (15, 16) which are arranged to hold the shells as a tightly fitting sheath around the luminaire.

Sheath according to claim 3, characterized in that the sheath extends a distance past connecting members 30 (2, 3) of the luminaire.