EP2233844A1 - Membrane pressure expansion container - Google Patents
Membrane pressure expansion container Download PDFInfo
- Publication number
- EP2233844A1 EP2233844A1 EP09003715A EP09003715A EP2233844A1 EP 2233844 A1 EP2233844 A1 EP 2233844A1 EP 09003715 A EP09003715 A EP 09003715A EP 09003715 A EP09003715 A EP 09003715A EP 2233844 A1 EP2233844 A1 EP 2233844A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- membrane
- outer edge
- sealing element
- vessel
- diaphragm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 81
- 238000007789 sealing Methods 0.000 claims abstract description 31
- 229920003023 plastic Polymers 0.000 claims abstract description 22
- 239000004033 plastic Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 claims 1
- 239000002356 single layer Substances 0.000 abstract 1
- 210000004379 membrane Anatomy 0.000 description 70
- 239000007789 gas Substances 0.000 description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 4
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 3
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000002318 adhesion promoter Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229920005601 base polymer Polymers 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002959 polymer blend Polymers 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1008—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system expansion tanks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1008—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system expansion tanks
- F24D3/1016—Tanks having a bladder
Definitions
- the invention relates to a membrane expansion vessel for connection to a pipeline network with two vessel parts, which are pressure-tight and fluid-tightly interconnected in a circumferential connection region, the closed vessel interior formed by the two vessel parts being separated from a flat or half-shell-shaped membrane into a water space and a gas space is, wherein the water space is connectable via a connecting piece with the pipe network.
- Such expansion vessels with membranes are used to accommodate changes in volume, for example, by pressure-dependent switching on and off of pumps, by pressure shock absorbers or temperature-related in closed fluid circuits that occur in water supply systems or heating circuits.
- two different expansion vessel types are distinguished, namely vessels with two vessel parts and a flat or half-shell-shaped membrane and vessels with a bubble-shaped membrane which is inserted with its opening edge into the water connection of the expansion vessel and forms the water space.
- the membrane can also form the gas space.
- a major disadvantage of these long-proven expansion vessels is especially that in membranes made of an elastomeric material, especially over a long period of time, a certain permeation effect can not be avoided, so that penetrate from the gas space gas in the water space and thus in the pipe network can, which is undesirable, especially in heating circuits. This also reduces the gas volume in the gas space, which requires maintenance, since a refilling is necessary. This is associated with the corresponding effort.
- the object of the invention is to develop a generic membrane expansion vessel so that a permeation of gas from the gas space into the water space reliably avoided, without thereby the manufacturing and assembly costs is increased significantly.
- a membrane pressure expansion vessel of the type described above that the membrane is formed of an at least single-layered, gas-impermeable plastic and circumferentially connected at its outer edge with a sealing element, wherein the outer edge of the membrane with the sealing element in the connecting region between the two Vessel parts is fluid-tight manner.
- a membrane expansion vessel available whose at least one-layer plastic membrane is gas impermeable, whereby a permeation of gas, in particular of air or nitrogen, is avoided.
- the plastic material for example, an ethylene-vinyl alcohol copolymer (EVOH) can be used as a base.
- the outer edge of the membrane is connected to a sealing element.
- This circumferential sealing element may be suitably applied to the outer edge of the membrane.
- the outer edge of the membrane is connected at the top and at the bottom in each case with a sealing element, whereby a particularly reliable sealing is achieved.
- the sealing element is C-shaped and the outer edge of the membrane on the upper and lower sides surrounds.
- Such a C-shaped sealing element can, for example, by encapsulation with the outer edge connected to the membrane.
- the sealing element consists of a sealing foam applied to the outer edge of the membrane.
- a sealing foam e.g. on a 2K polyurethane base
- manufacturing technology makes it particularly easy to apply to the outer edge of the membrane.
- the sealing element thus follows the contour of the outer edge of the membrane, which is dependent on the particular vessel shape (e.g., round, polygonal, polygonal with rounded edges).
- the pressure and fluid-tight connection of the two vessel parts is preferably ensured in a manner known per se by virtue of the fact that the two vessel parts are positively connected to one another in the connection region while clamping the outer edge of the membrane.
- An example of such a positive connection is in the FIG. 1 of the DE 28 14 162 B2 shown.
- the membrane itself is preferably formed according to a first preferred embodiment of a plastic blend.
- a plastic blend in particular a polymer blend, is a molecularly distributed or microscopically dispersed plastic alloy, ie a mixture of at least two base plastics or base polymers.
- a base material then preferably has the required elastic properties, which allows the deformation of the membrane under pressure changes, and the other the gas barrier properties.
- the membrane is made of an at least two-layer composite material with a first layer of an elastic plastic and a consists of an elastic gas-impermeable plastic associated with the first layer second layer.
- the one layer serves as a carrier layer, to which, for example, by coextrusion, the second layer is applied.
- the membrane has an at least three-layer structure, wherein the third layer consists of an elastic plastic.
- the second layer of an elastic gas-impermeable plastic is then embedded on both sides.
- Adhesion promoters may be provided between the layers.
- a diaphragm pressure expansion vessel is in Fig. 1 generally denoted by 1.
- This membrane expansion vessel 1 is formed in the embodiment as a flat vessel and suitable, for example, for insertion into a wall spa. But it can also have a different geometric design, for example, when used in conjunction with a boiler.
- the membrane pressure expansion vessel 1 has two half-shell-shaped vessel parts 2, 3 made of metal.
- the two vessel parts 2, 3 can basically have any desired geometric shape, e.g. also oval or angular.
- the vessel parts 2, 3 are connected to one another in a pressure-fluid-tight and fluid-tight manner in a circumferential connection area, generally designated 4, which will be explained in more detail below.
- a connecting piece 5 is provided for connecting the diaphragm expansion vessel 1 to a not shown line network.
- the interior of the membrane expansion vessel 1 is subdivided by a membrane 6 into a water space 7 communicating with the connecting piece 5 and a gas space 8, this gas space 8 is provided with a gas under a predetermined overpressure, e.g. Air or nitrogen, filled.
- a gas filling opening is provided, e.g. is closed by means of a simple plug or a gas filling valve 9.
- the membrane 6 is made of an at least single-layered gas-impermeable plastic, e.g. from a plastic blend, i. a plastic alloy of at least two constituents, one component having elastic properties and the other having gas impermeable properties.
- the gas-impermeable component may be, for example, EVOH and, of course, is also so elastic that the diaphragm 6 can change its shape under pressure changes and compress the gas space 8.
- the membrane 6 can be equipped with additional profiles, beads or the like, which is not shown in detail.
- this membrane 6 consists of an at least two-layer composite material, in Fig. 2 is a three-layer structure shown.
- This membrane 6 consists of a first layer 6a made of an elastic plastic, for example propylene, a second layer 6b of an elastic gas-impermeable plastic, for example EVOH, and a third layer 6c, again of an elastic material, eg propylene (PP) or polyethylene ( PE).
- PP propylene
- PE polyethylene
- an adhesion promoter can be provided between the layers.
- Such a multilayer membrane 6 can be produced, for example, by coextrusion.
- the outer edge 10 of the membrane 6 is preferably connected to the upper and lower sides in each case with a sealing element 11.
- This sealing element 11 is preferably a sealing foam applied to the outer edge of the membrane 6, for example based on 2K polyurethane.
- the membrane 6 is provided with its provided with the sealing elements 11 outer edge 10 in the connection region 4 between the two vessel parts 2, 3, then the vessel halves 2, 3 in the connection region 4, preferably positively, clamped together, e.g. by means of a circumferential clamping ring 12th
- the membrane 6 then serves in addition to its actual membrane function at the same time as a sealing element in the connection region 4.
- the sealing function is reliably ensured by the circumferential sealing element 11 at the outer edge 10 of the membrane 6, even if the material of the membrane 6 itself is not suitable as a sealant.
- a single cross-sectionally C-shaped sealing element 11 ' is provided, which surrounds the outer edge (10) of the membrane (6) on the upper and lower sides and the outer edge (10) terminates radially outward.
- Such a one-piece sealing element (11 ') can be connected, for example, by molding the membrane (6) with the membrane (6).
- the invention is not limited to the illustrated embodiments. Further embodiments are possible without departing from the basic idea.
- the two vessel parts 2, 3 also, as mentioned above, have a different geometric shape.
- the membrane 6 itself can also have only one or two-layer structure.
- the sealing element can also be formed by the elastic layer (6a or 6c) itself by appropriate material thickening.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Buffer Packaging (AREA)
- Diaphragms And Bellows (AREA)
Abstract
Description
Die Erfindung betrifft ein Membrandruckausdehnungsgefäß zum Anschließen an ein Leitungsnetz mit zwei Gefäßteilen, die in einem umfänglichen Verbindungsbereich druck- und fluiddicht miteinander verbunden sind, wobei der von den beiden Gefäßteilen gebildete geschlossene Gefäßinnenraum von einer flachen bzw. halbschalenförmigen Membran in einen Wasserraum und einen Gasraum getrennt ist, wobei der Wasserraum über einen Anschlussstutzen mit dem Leitungsnetz verbindbar ist.The invention relates to a membrane expansion vessel for connection to a pipeline network with two vessel parts, which are pressure-tight and fluid-tightly interconnected in a circumferential connection region, the closed vessel interior formed by the two vessel parts being separated from a flat or half-shell-shaped membrane into a water space and a gas space is, wherein the water space is connectable via a connecting piece with the pipe network.
Derartige Ausdehnungsgefäße mit Membranen dienen zur Aufnahme von Volumenänderungen, beispielsweise durch druckabhängiges Ein- und Ausschalten von Pumpen, durch Druckschlagdämpfer oder auch temperaturbedingt in geschlossenen Flüssigkeitskreisläufen, die in Wasserversorgungssystemen oder Heizungskreisläufen auftreten.Such expansion vessels with membranes are used to accommodate changes in volume, for example, by pressure-dependent switching on and off of pumps, by pressure shock absorbers or temperature-related in closed fluid circuits that occur in water supply systems or heating circuits.
Es werden im Wesentlichen zwei unterschiedliche Ausdehnungsgefäßtypen unterschieden, nämlich Gefäße mit zwei Gefäßteilen und einer flachen bzw. halbschalenförmigen Membran sowie Gefäße mit einer blasenförmigen Membran, die mit ihrem Öffnungsrand in den Wasseranschlussstutzen des Ausdehnungsgefäßes eingesetzt ist und den Wasserraum bildet. Alternativ kann die Membran auch den Gasraum bilden.Essentially, two different expansion vessel types are distinguished, namely vessels with two vessel parts and a flat or half-shell-shaped membrane and vessels with a bubble-shaped membrane which is inserted with its opening edge into the water connection of the expansion vessel and forms the water space. Alternatively, the membrane can also form the gas space.
Bei Ausdehnungsgefäßen mit flacher bzw. halbschalenförmiger Membran gibt es unterschiedliche Gefäßformen, wobei in erster Linie zwischen Flachgefäßen, die z.B. in Wandheizthermen eingesetzt werden, und zylindrischen bzw. kugelartigen Gefäßen unterschieden wird. Diesen beiden Gefäßtypen ist gemeinsam, dass der Gefäßinnenraum durch eine flache bzw. halbschalenförmige Membran aus einem elastischen Material in einen Wasser- und einen Gasraum unterteilt wird, wobei die Membran gleichzeitig als Abdichtelement zwischen den beiden Gefäßteilen dienen kann. Eine solche Lösung ist z.B. in
Aus
Aufgabe der Erfindung ist es, ein gattungsgemäßes Membrandruckausdehnungsgefäß so weiter zu entwickeln, dass eine Permeation von Gas aus dem Gasraum in den Wasserraum zuverlässig vermieden wird, ohne dass dadurch der Herstell- und Montageaufwand nennenswert vergrößert wird.The object of the invention is to develop a generic membrane expansion vessel so that a permeation of gas from the gas space into the water space reliably avoided, without thereby the manufacturing and assembly costs is increased significantly.
Diese Aufgabe wird bei einem Membrandruckausdehnungsgefäß der eingangs bezeichneten Art erfindungsgemäß dadurch gelöst, dass die Membran aus einem wenigstens einschichtigen, gasundurchlässigen Kunststoff gebildet und umlaufend an ihrem Außenrand mit einem Dichtelement verbunden ist, wobei der Außenrand der Membran mit dem Dichtelement in den Verbindungsbereich zwischen den beiden Gefäßteilen fluiddicht eingebunden ist.This object is achieved according to the invention in a membrane pressure expansion vessel of the type described above, that the membrane is formed of an at least single-layered, gas-impermeable plastic and circumferentially connected at its outer edge with a sealing element, wherein the outer edge of the membrane with the sealing element in the connecting region between the two Vessel parts is fluid-tight manner.
Es steht somit ein Membrandruckausdehnungsgefäß zur Verfügung, dessen wenigstens einschichtige Kunststoffmembran gasundurchlässig ist, wodurch eine Permeation von Gas, insbesondere von Luft oder Stickstoff, vermieden wird. Als Kunststoffmaterial kann beispielsweise als Basis ein Ethylen-Vinyl-Alkohol-Copolymer (EVOH) verwendet werden.Thus, there is a membrane expansion vessel available whose at least one-layer plastic membrane is gas impermeable, whereby a permeation of gas, in particular of air or nitrogen, is avoided. As the plastic material, for example, an ethylene-vinyl alcohol copolymer (EVOH) can be used as a base.
Um ohne zusätzlichen Montageaufwand gleichzeitig die Abdichtfunktion der Membran zwischen den beiden Gefäßteilen zu gewährleisten, ist erfindungsgemäß der Außenrand der Membran mit einem Dichtelement verbunden. Dieses umlaufende Dichtelement kann in geeigneter Weise auf den Außenrand der Membran aufgebracht sein.In order to simultaneously ensure the sealing function of the membrane between the two vessel parts without additional installation effort, according to the invention, the outer edge of the membrane is connected to a sealing element. This circumferential sealing element may be suitably applied to the outer edge of the membrane.
Dabei ist bevorzugt vorgesehen, der der Außenrand der Membran an der Oberseite und an der Unterseite jeweils mit einem Dichtelement verbunden ist, wodurch eine besonders zuverlässige Abdichtung erzielt wird.It is preferably provided that the outer edge of the membrane is connected at the top and at the bottom in each case with a sealing element, whereby a particularly reliable sealing is achieved.
Alternativ kann vorgesehen sein, dass das Dichtelement C-förmig ausgebildet ist und den Außenrand der Membran ober- und unterseitig umgreift. Ein solches C-förmiges Dichtelement kann z.B. durch Umspritzen mit dem Außenrand der Membran verbunden werden.Alternatively it can be provided that the sealing element is C-shaped and the outer edge of the membrane on the upper and lower sides surrounds. Such a C-shaped sealing element can, for example, by encapsulation with the outer edge connected to the membrane.
In besonders bevorzugter Ausgestaltung ist vorgesehen, dass das Dichtelement aus einem auf den Außenrand der Membran aufgebrachten Dichtungsschaum besteht. Ein solcher Dichtungsschaum, z.B. auf einer 2K-Polyurethan-Basis, lässt sich herstellungstechnich besonders einfach auf den Außenrand der Membran aufbringen. Das Dichtelement folgt somit der Kontur des Außenrandes der Membran, die von der jeweiligen Gefäßform abhängig ist (z.B. rund, mehreckig, mehreckig mit abgerundeten Kanten).In a particularly preferred embodiment, it is provided that the sealing element consists of a sealing foam applied to the outer edge of the membrane. Such a sealing foam, e.g. on a 2K polyurethane base, manufacturing technology makes it particularly easy to apply to the outer edge of the membrane. The sealing element thus follows the contour of the outer edge of the membrane, which is dependent on the particular vessel shape (e.g., round, polygonal, polygonal with rounded edges).
Die druck- und fluiddichte Verbindung der beiden Gefäßteile wird in an sich bekannter Weise vorzugsweise dadurch gewährleistet, dass die beiden Gefäßteile im Verbindungsbereich unter Einklemmung des Außenrandes der Membran formschlüssig miteinander verbunden sind. Ein Beispiel für eine solche formschlüssige Verbindung ist in der
Die Membran selbst ist nach einer ersten bevorzugten Ausgestaltung bevorzugt aus einem Kunststoffblend gebildet. Ein solcher Kunststoffblend, insbesondere ein Polymerblend, ist eine molekular verteilte oder mikroskopisch dispergierte Kunststofflegierung, also eine Mischung aus mindestens zwei Basiskunststoffen bzw. Basispolymeren. Ein Basismaterial weist dann vorzugsweise die erforderlichen elastischen Eigenschaften, welche die Verformung der Membran bei Druckänderungen ermöglicht, und das andere die Gassperreigenschaften auf.The membrane itself is preferably formed according to a first preferred embodiment of a plastic blend. Such a plastic blend, in particular a polymer blend, is a molecularly distributed or microscopically dispersed plastic alloy, ie a mixture of at least two base plastics or base polymers. A base material then preferably has the required elastic properties, which allows the deformation of the membrane under pressure changes, and the other the gas barrier properties.
Zusätzlich oder alternativ ist in weiterer bevorzugter Ausgestaltung vorgesehen, dass die Membran aus einem wenigstens zweischichtigen Verbundwerkstoff mit einer ersten Schicht aus einem elastischen Kunststoff und einer mit der ersten Schicht verbundenen zweiten Schicht aus einem elastischen gasundurchlässigen Kunststoff besteht. Bei dieser Ausführungsform dient die eine Schicht als Trägerschicht, auf welche z.B. durch Coextrusion die zweite Schicht aufgebracht wird.Additionally or alternatively, in a further preferred embodiment, it is provided that the membrane is made of an at least two-layer composite material with a first layer of an elastic plastic and a consists of an elastic gas-impermeable plastic associated with the first layer second layer. In this embodiment, the one layer serves as a carrier layer, to which, for example, by coextrusion, the second layer is applied.
In weiterer vorteilhafter Ausgestaltung ist vorgesehen, dass die Membran einen wenigstens dreischichtigen Aufbau aufweist, wobei die dritte Schicht aus einem elastischen Kunststoff besteht. Die zweite Schicht aus einem elastischen gasundurchlässigen Kunststoff ist dann beidseitig eingebettet.In a further advantageous embodiment, it is provided that the membrane has an at least three-layer structure, wherein the third layer consists of an elastic plastic. The second layer of an elastic gas-impermeable plastic is then embedded on both sides.
Zwischen den Schichten können Haftvermittler vorgesehen sein.Adhesion promoters may be provided between the layers.
Die Erfindung ist nachstehend anhand der Zeichnung beispielhaft näher erläutert. Diese zeigt in
- Fig. 1
- einen Schnitt durch ein Membrandruckausdehnungsgefäß,
- Fig. 2
- in vergrößerter Darstellung einen Querschnitt des Aufbaus der Membran nach einer bevorzugten Ausführungsform,
- Fig. 3
- eine Teildraufsicht auf die Membran nach
Fig. 2 , - Fig. 4
- in vergrößerter Darstellung einen Querschnitt des Aufbaus der Membran nach einer weiteren bevorzugten Ausführungsform und in
- Fig. 5
- eine Teildraufsicht auf die Membran nach
Fig. 4 .
- Fig. 1
- a section through a diaphragm pressure expansion vessel,
- Fig. 2
- in an enlarged view a cross section of the structure of the membrane according to a preferred embodiment,
- Fig. 3
- a partial plan view of the membrane behind
Fig. 2 . - Fig. 4
- in an enlarged view a cross section of the structure of the membrane according to a further preferred embodiment and in
- Fig. 5
- a partial plan view of the membrane behind
Fig. 4 ,
Ein Membrandruckausdehnungsgefäß ist in
Das Membrandruckausdehnungsgefäß 1 weist zwei halbschalenförmige Gefäßteile 2, 3 aus Metall auf. Die beiden Gefäßteile 2, 3 können grundsätzlich jede beliebige geometrische Form aufweisen, z.B. auch oval oder eckig. Die Gefäßteile 2, 3 sind in einem allgemein mit 4 bezeichneten umfänglichen Verbindungsbereich druck- und fluiddicht miteinander verbunden, was nachfolgend näher erläutert wird.The membrane pressure expansion vessel 1 has two half-shell-
Im Gefäßteil 2 ist ein Anschlussstutzen 5 zum Anschließen des Membrandruckausdehnungsgefäßes 1 an ein nicht dargestelltes Leitungsnetz vorgesehen. Der Innenraum des Membrandruckausdehnungsgefäßes 1 ist von einer Membran 6 in einen mit dem Anschlussstutzen 5 in Verbindung stehenden Wasserraum 7 und einem Gasraum 8 unterteilt, dieser Gasraum 8 ist mit einem unter einem vorgegebenen Überdruck stehenden Gas, z.B. Luft oder Stickstoff, gefüllt. Dazu ist eine Gasbefüllöffnung vorgesehen, die z.B. mittels eines einfachen Stopfens oder eines Gasfüllventils 9 verschlossen ist.In the
Wenn sich das Volumen des Wassers im Leitungsnetz vergrößert, dringt Wasser durch den Anschlussstutzen 5 in den Wasserraum 7, d.h. in das Innere des Gefäßes 1 ein, wodurch die Membran 6 gegen das Gaspolster zusammengedrückt wird.As the volume of water in the conduit network increases, water will penetrate through the spigot 5 into the water space 7, i. into the interior of the vessel 1, whereby the
Wesentlich für das Membrandruckausdehnungsgefäß 1 ist die Gestaltung der Membran 6. Diese weist bevorzugt eine Kontur auf, welche an die halbschalenförmige Kontur des Gefäßteiles 2 weitestgehend angepasst ist.Essential for the diaphragm expansion vessel 1 is the Design of the
Die Membran 6 besteht aus einem wenigstens einschichtigen gasundurchlässigen Kunststoff, z.B. aus einem Kunststoffblend, d.h. einer Kunststofflegierung aus wenigstens zwei Bestandteilen, wobei der eine Bestandteil elastische Eigenschaften und der andere gasundurchlässige Eigenschaften aufweist. Der gasundurchlässige Bestandteil kann beispielsweise EVOH sein und ist selbstverständlich ebenfalls so elastisch, dass die Membran 6 bei Druckänderungen ihre Form verändern und den Gasraum 8 zusammendrücken kann. Dazu kann die Membran 6 mit zusätzlichen Profilierungen, Sicken oder dgl. ausgerüstet sein, was nicht näher dargestellt ist.The
Bei der in
Der AuĂźenrand 10 der Membran 6 ist vorzugsweise ober- und unterseitig jeweils mit einem Dichtelement 11 verbunden. Dieses Dichtelement 11 ist bevorzugt ein auf den AuĂźenrand der Membran 6 aufgebrachter Dichtungsschaum, z.B. auf 2K-Polyurethan-Basis.The
Bei der Montage des Membrandruckausdehnungsgefäßes 1 wird die Membran 6 mit ihrem mit den Dichtelementen 11 versehenen Außenrand 10 in den Verbindungsbereich 4 zwischen den beiden Gefäßteilen 2, 3 eingebracht, anschließend werden die Gefäßhälften 2, 3 im Verbindungsbereich 4, vorzugsweise formschlüssig, miteinander verklemmt, z.B. mittels eines umlaufenden Klemmringes 12.During assembly of the membrane expansion vessel 1, the
Die Membran 6 dient dann neben ihrer eigentlichen Membranfunktion zugleich als Dichtelement im Verbindungsbereich 4. Die Dichtfunktion ist durch das umlaufende Dichtelement 11 am Außenrand 10 der Membran 6 zuverlässig gewährleistet, auch wenn das Material der Membran 6 selbst nicht als Dichtmittel geeignet ist.The
In den
Im Unterschied zur AusfĂĽhrungsform nach
Natürlich ist die Erfindung nicht auf die dargestellten Ausführungsbeispiele beschränkt. Weitere Ausgestaltungen sind möglich, ohne den Grundgedanken zu verlassen. So können die beiden Gefäßteile 2, 3 auch, wie vorerwähnt, eine andere geometrische Form aufweisen. Die Membran 6 selbst kann auch nur einen ein- oder zweischichtigen Aufbau aufweisen. Wenn die Membran 6, wie in den Ausführungsbeispielen dargestellt, einen dreischichtigen Aufbau aufweist, kann bei entsprechender Materialauswahl das Dichtelement auch von der elastischen Schicht (6a bzw. 6c) selbst durch entsprechende Materialverdickung gebildet sein.Of course, the invention is not limited to the illustrated embodiments. Further embodiments are possible without departing from the basic idea. Thus, the two
Claims (8)
dadurch gekennzeichnet,
dass die Membran (6) aus einem wenigstens einschichtigen, gasundurchlässigen Kunststoff gebildet und umlaufend an ihrem Außenrand (10) mit einem Dichtelement (11) verbunden ist, wobei der Außenrand (10) der Membran (6) mit dem Dichtelement (11,11') in den Verbindungsbereich (4) zwischen den beiden Gefäßteilen (2,3) fluiddicht eingebunden ist.Membrane pressure expansion vessel for connection to a pipeline network with two vessel parts (2, 3) which are connected to one another in a peripheral connection area (4) in a pressure-tight and fluid-tight manner, wherein the closed vessel interior formed by the two vessel parts (2, 3) is half-shell-shaped membrane (6) into a water space (7) and a gas space (8) is separated, wherein the water space (7) via a connecting piece (5) is connectable to the pipe network,
characterized,
is that the membrane (6) is formed of an at least single-layered, gas-impermeable plastic material and peripherally on its outer edge (10) with a sealing element (11), wherein the outer edge (10) of the membrane (6) with the sealing element (11,11 ' ) in the connection region (4) between the two vessel parts (2,3) is fluid-tight manner.
dadurch gekennzeichnet,
dass der AuĂźenrand (10) der Membran (6) an der Oberseite und an der Unterseite jeweils mit einem Dichtelement (11) verbunden ist.Diaphragm pressure expansion vessel according to claim 1,
characterized,
that the outer edge (10) of the membrane (6) is connected at the top and at the bottom in each case with a sealing element (11).
dadurch gekennzeichnet,
dass das Dichtelement (11') C-förmig ausgebildet ist und den Außenrand (10) der Membran (6) ober- und unterseitig umgreift.Diaphragm pressure expansion vessel according to claim 1,
characterized,
that the sealing element (11 ') is C-shaped and surrounds the outer edge (10) of the membrane (6) on the upper and lower sides.
dadurch gekennzeichnet,
dass das Dichtelement (11,11') aus einem auf den AuĂźenrand (10) der Membran (6) aufgebrachten Dichtungsschaum besteht.Diaphragm pressure expansion vessel according to claim 1 or 2,
characterized,
that the sealing element (11,11 ') is applied from one to the outer edge (10) of the diaphragm (6) sealing foam.
dadurch gekennzeichnet,
dass die beiden Gefäßteile (2,3) im Verbindungsbereich (4) unter Einklemmung des Außenrandes (10) der Membran (6) formschlüssig miteinander verbunden sind.Diaphragm expansion vessel according to claim 1, 2, 3 or 4,
characterized,
that the two container parts (2,3) are in the connecting region (4) by clamping of the outer edge (10) of the membrane (6) positively connected with each other.
dadurch gekennzeichnet,
dass die Membran (6) aus einem Kunststoffblend gebildet ist.Diaphragm expansion vessel according to one or more of claims 1 to 5,
characterized,
that the membrane (6) is formed from a plastic blend.
dadurch gekennzeichnet,
dass die Membran (6) aus einem wenigstens zweischichtigen Verbundwerkstoff mit einer ersten Schicht aus einem elastischen Kunststoff und einer mit der ersten Schicht verbundenen zweiten Schicht aus einem elastischen gasundurchlässigen Kunststoff besteht.Diaphragm pressure expansion vessel according to one or more of claims 1 to 6,
characterized,
in that the membrane (6) consists of an at least two-layered composite material with a first layer of an elastic plastic and a second layer of an elastic gas-impermeable plastic connected to the first layer.
dadurch gekennzeichnet,
dass die Membran (6) einen wenigstens dreischichtigen Aufbau aufweist, wobei die dritte Schicht aus einem elastischen Kunststoff besteht.Diaphragm expansion vessel according to claim 7,
characterized,
that the membrane (6) has an at least three-layered construction, wherein the third layer consists of an elastic plastic.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK09003715.1T DK2233844T4 (en) | 2009-03-14 | 2009-03-14 | Diaphragm pressure expansion tank |
PL09003715T PL2233844T5 (en) | 2009-03-14 | 2009-03-14 | Membrane pressure expansion container |
PT90037151T PT2233844E (en) | 2009-03-14 | 2009-03-14 | Membrane pressure expansion container |
SI200931048A SI2233844T2 (en) | 2009-03-14 | 2009-03-14 | Membrane pressure expansion container |
EP09003715.1A EP2233844B2 (en) | 2009-03-14 | 2009-03-14 | Membrane pressure expansion container |
SI200931048T SI2233844T1 (en) | 2009-03-14 | 2009-03-14 | Membrane pressure expansion container |
ES09003715.1T ES2521500T5 (en) | 2009-03-14 | 2009-03-14 | Pressurized membrane expansion vessel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09003715.1A EP2233844B2 (en) | 2009-03-14 | 2009-03-14 | Membrane pressure expansion container |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2233844A1 true EP2233844A1 (en) | 2010-09-29 |
EP2233844B1 EP2233844B1 (en) | 2014-09-17 |
EP2233844B2 EP2233844B2 (en) | 2017-03-01 |
Family
ID=40933588
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09003715.1A Active EP2233844B2 (en) | 2009-03-14 | 2009-03-14 | Membrane pressure expansion container |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2233844B2 (en) |
DK (1) | DK2233844T4 (en) |
ES (1) | ES2521500T5 (en) |
PL (1) | PL2233844T5 (en) |
PT (1) | PT2233844E (en) |
SI (2) | SI2233844T1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITPD20100166A1 (en) * | 2010-05-26 | 2011-11-27 | Zilmet S P A | MEMBRANE FOR EXPANSION VESSELS |
WO2020218999A3 (en) * | 2019-04-25 | 2020-12-30 | Önaysan Endüstri̇yel Ürünler Üreti̇m Ve Diş Ti̇caret Anoni̇m Şi̇rketi̇ | Expansion tank structure |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3440412B1 (en) * | 2016-04-05 | 2020-11-18 | Smart Global B. Energy Ltd | Water heating system with smart boiler and method thereof |
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US2371632A (en) * | 1943-01-01 | 1945-03-20 | Ideal Roller & Mfg Company | Accumulator |
DE2814162B2 (en) | 1977-12-23 | 1980-01-10 | Viatour S.A., Rombas (Frankreich) | |
US4315527A (en) | 1980-01-14 | 1982-02-16 | Tmi Sales Corporation | Expansion tanks for pressurized fluids and diaphragms therefor |
DE3544754A1 (en) | 1985-12-18 | 1987-06-19 | Viessmann Werke Kg | Heat-expansion compensating apparatus |
DE29511961U1 (en) * | 1995-07-25 | 1995-09-28 | Lin, Ching-Hsiung, Pingtung | Pressurized water boiler |
DE202006015642U1 (en) * | 2006-07-08 | 2007-01-11 | Winkelmann Sp. Z.O.O. | Membrane expansion vessel is made up of two metal halves and is divided into gas chamber and water chamber by membrane which is made up of elastomer layer and metal foil layer |
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FR2636638B1 (en) †| 1988-09-20 | 1990-12-21 | Peugeot | WATERPROOF ELASTIC MEMBRANE AND HYDROPNEUMATIC ACCUMULATOR EQUIPPED WITH SUCH A MEMBRANE |
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FR2759743B1 (en) †| 1997-02-17 | 1999-04-02 | Peugeot | GAS WATERPROOF ELASTIC MEMBRANE AND HYDROPNEUMATIC ACCUMULATOR EQUIPPED WITH THIS MEMBRANE |
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-
2009
- 2009-03-14 DK DK09003715.1T patent/DK2233844T4/en active
- 2009-03-14 PT PT90037151T patent/PT2233844E/en unknown
- 2009-03-14 ES ES09003715.1T patent/ES2521500T5/en active Active
- 2009-03-14 EP EP09003715.1A patent/EP2233844B2/en active Active
- 2009-03-14 SI SI200931048T patent/SI2233844T1/en unknown
- 2009-03-14 PL PL09003715T patent/PL2233844T5/en unknown
- 2009-03-14 SI SI200931048A patent/SI2233844T2/en unknown
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Publication number | Priority date | Publication date | Assignee | Title |
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US2371632A (en) * | 1943-01-01 | 1945-03-20 | Ideal Roller & Mfg Company | Accumulator |
DE2814162B2 (en) | 1977-12-23 | 1980-01-10 | Viatour S.A., Rombas (Frankreich) | |
US4315527A (en) | 1980-01-14 | 1982-02-16 | Tmi Sales Corporation | Expansion tanks for pressurized fluids and diaphragms therefor |
DE3544754A1 (en) | 1985-12-18 | 1987-06-19 | Viessmann Werke Kg | Heat-expansion compensating apparatus |
DE29511961U1 (en) * | 1995-07-25 | 1995-09-28 | Lin, Ching-Hsiung, Pingtung | Pressurized water boiler |
DE202006015642U1 (en) * | 2006-07-08 | 2007-01-11 | Winkelmann Sp. Z.O.O. | Membrane expansion vessel is made up of two metal halves and is divided into gas chamber and water chamber by membrane which is made up of elastomer layer and metal foil layer |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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ITPD20100166A1 (en) * | 2010-05-26 | 2011-11-27 | Zilmet S P A | MEMBRANE FOR EXPANSION VESSELS |
WO2020218999A3 (en) * | 2019-04-25 | 2020-12-30 | Önaysan Endüstri̇yel Ürünler Üreti̇m Ve Diş Ti̇caret Anoni̇m Şi̇rketi̇ | Expansion tank structure |
Also Published As
Publication number | Publication date |
---|---|
PT2233844E (en) | 2014-11-03 |
ES2521500T5 (en) | 2017-07-04 |
DK2233844T4 (en) | 2017-04-24 |
EP2233844B2 (en) | 2017-03-01 |
DK2233844T3 (en) | 2014-11-03 |
SI2233844T2 (en) | 2017-05-31 |
ES2521500T3 (en) | 2014-11-12 |
PL2233844T5 (en) | 2017-10-31 |
SI2233844T1 (en) | 2014-12-31 |
EP2233844B1 (en) | 2014-09-17 |
PL2233844T3 (en) | 2015-01-30 |
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