FR2649906A1 - Plastic filter body and its method of production - Google Patents
Plastic filter body and its method of production Download PDFInfo
- Publication number
- FR2649906A1 FR2649906A1 FR8910319A FR8910319A FR2649906A1 FR 2649906 A1 FR2649906 A1 FR 2649906A1 FR 8910319 A FR8910319 A FR 8910319A FR 8910319 A FR8910319 A FR 8910319A FR 2649906 A1 FR2649906 A1 FR 2649906A1
- Authority
- FR
- France
- Prior art keywords
- envelope
- film
- filter body
- ribs
- body according
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 9
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 230000008602 contraction Effects 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000005484 gravity Effects 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 claims 1
- 239000004576 sand Substances 0.000 abstract description 3
- 230000009182 swimming Effects 0.000 abstract description 3
- 230000010339 dilation Effects 0.000 description 2
- 238000001175 rotational moulding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009730 filament winding Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/30—Filter housing constructions
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
Description
CORPS DE FILTRE EN MATER lAU PLASTIQUE ET SON PROCEDE DE REALISATION
La présente invention concerne les filtres à gravité comme les filtres à sable utilisés notamment pour la clarification des eaux de piscines ou autres.PLASTIC WATER MATERIAL FILTER BODY AND METHOD FOR PRODUCING THE SAME
The present invention relates to gravity filters such as sand filters used in particular for clarifying swimming pool or other waters.
Le plus souvent le corps de tels filtres est réalisé en matière plastique selon les techniques bien connues de moulage ou de rotomoulage. Most often the body of such filters is made of plastic material according to well known techniques of molding or rotational molding.
L'un des problèmes majeurs qui apparatt lors de l'emploi de ces filtrés, et plus particulièrement avec les filtres de grands volumes, réside dans les phénomènes de dilatation et de contraction de la paroi interne du corps, cette dilatation et cette contraction pouvant faire varier de 4 à 6 % le périmètre interne dudit corps. One of the major problems which appears during the use of these filters, and more particularly with the filters of large volumes, resides in the phenomena of dilation and contraction of the internal wall of the body, this dilation and this contraction being able to make vary from 4 to 6% the internal perimeter of said body.
La présente invention a pour objet un corps de filtre qui échappe à cet inconvénient. The present invention relates to a filter body which escapes this drawback.
Plus précisément, l'invention a pour objet un corps de filtre à gravité, en matériau plastique, utilisé notamment pour la clarification des eaux, caractérisé en ce qu'il est constitué d'une enveloppe composée d'une première pellicule formant la paroi interne de l'enveloppe et d'une deuxième pellicule formant le revêtement externe de ladite enveloppe, cette dernière comprenant des moyens pour limiter les dilatations et les contractions de ladite première pellicule. More specifically, the invention relates to a gravity filter body, made of plastic material, used in particular for clarifying water, characterized in that it consists of an envelope composed of a first film forming the internal wall of the envelope and of a second film forming the external coating of said envelope, the latter comprising means for limiting the expansions and contractions of said first film.
L'invention a également pour objet un procédé permettant de réaliser un corps de filtre > dont la structure présente les caractéristiques ci-dessus énoncées, ce procédé, consistant dans les opérations successives suivantes
* moulage de la première pellicule constituant la paroi interne de là susdite enveloppe,
* mise en place des moyens permettant de limiter les dilatations et les contractions de ladite première pellicule, et
* pose de la deuxième pellicule constituant le revêtement externe de la susdite- enveloppe.The subject of the invention is also a method for making a filter body> the structure of which has the characteristics set out above, this method consisting of the following successive operations
* molding of the first film constituting the internal wall of the above-mentioned envelope,
* implementation of means making it possible to limit the expansions and contractions of said first film, and
* laying of the second film constituting the external coating of the above-envelope.
Les autres caractéristiques du corps de filtre de l'invention et du procédé qui permet de le réaliser apparaîtront plus clairement à la lecture de la description qui suit d'un exemple détaillé d'un filtre conçu conformément aux enseignements de ladite invention. The other characteristics of the filter body of the invention and of the method which makes it possible to realize it will appear more clearly on reading the following description of a detailed example of a filter designed in accordance with the teachings of said invention.
Cette description est accompagnée de dessins, lesquels représentent
* à la Figure 1, une vue en coupe partielle et en élévation du corps d'un tel filtre
* à la Figure 2, une vue en coupe prise selon la ligne Il-Il de la
Figure 1. c'est-à-dire au niveau supérieur du corps du filtre
* à la Figure 3, une vue en coupe prise selon la ligne 111-111 de la
Figure 1. c'est-à-dire au niveau inférieur du corps du filtre ; et
* à la Figure 4, une vue en coupe agrandie d'une portion de l'enveloppe du corps de ce filtre.This description is accompanied by drawings, which represent
* in Figure 1, a partial sectional view in elevation of the body of such a filter
* in Figure 2, a sectional view taken along the line Il-Il of the
Figure 1. i.e. at the upper level of the filter body
* in Figure 3, a sectional view taken along line 111-111 of the
Figure 1. that is to say at the lower level of the filter body; and
* in Figure 4, an enlarged sectional view of a portion of the envelope of the body of this filter.
Les dessins illustrant un seul et même exemple de réalisation d'un corps de filtre conforme à l'invention, on pourra se reporter selon les besoins à l'une ou l'autre des Figures, chaque élément apparaissant sur les diverses
Figures étant affecté de la même référence numérique.The drawings illustrating a single and same embodiment of a filter body according to the invention, reference may be made, as necessary, to one or other of the Figures, each element appearing on the various
Figures being assigned the same reference number.
Le corps de filtre conforme à l'invention est constitué d'une enveloppe 1 de révolution et, dans l'exemple illustré, cette enveloppe est sensiblement de forme cylindrique bien que la forme sphérique ait pu tout aussi bien être adoptée. The filter body according to the invention consists of an envelope 1 of revolution and, in the example illustrated, this envelope is substantially of cylindrical shape although the spherical shape could just as easily have been adopted.
Un tel filtre est plus particulièrement destiné au recyclage de l'eau des piscines, cette eau étant amenée a passer au travers d'un milieu filtrant, par exemple du sable disposé dans le filtre, en circulant de la bouche d'entrée 2 délimitée par les rebords 3 vers le fond 10 dudit filtre, ce fond pouvant être dans certains cas ouvert pour permettre de loger une conduite. Such a filter is more particularly intended for recycling swimming pool water, this water being caused to pass through a filtering medium, for example sand placed in the filter, by circulating from the inlet mouth 2 delimited by the edges 3 towards the bottom 10 of said filter, this bottom being able in certain cases to be opened to allow a pipe to be accommodated.
L'enveloppe est composée d'une première et d'une deuxième pellicules, respectivement 4 et 5, la pellicule 4 formant la paroi interne de l'enveloppe et la pellicule 5 formant le revêtement externe de ladite enveloppe. La pellicule 4 pourra être réalisée par rotomoulage alors que la pellicule 5 pourra être obtenue classiquement par enroulement filamentaire. The envelope is composed of a first and a second film, respectively 4 and 5, the film 4 forming the internal wall of the envelope and the film 5 forming the external coating of said envelope. The film 4 can be produced by rotational molding while the film 5 can conventionally be obtained by filament winding.
Conformément à l'invention, l'enveloppe ainsi conçue comprend des moyens permettant de limiter les dilatations et les contractions subies par la première pellicule 4 en raison des variations de température. Ces moyens sont constitués par une pluralité de nervures 6, 7, ...etc, qui, dans le mode de réalisation donné en exemple, sont situées dans des plans concourant sur l'axe de révolution 11 de l'enveloppe 1. According to the invention, the envelope thus designed comprises means making it possible to limit the expansions and contractions undergone by the first film 4 due to the variations in temperature. These means consist of a plurality of ribs 6, 7, etc., which, in the embodiment given as an example, are located in planes which compete on the axis of revolution 11 of the envelope 1.
On peut observer que ces nervures ne se déploient pas sur la totalité du périmètre de l'enveloppe mais présentent alternativement des petites et des grandes longueurs. Ainsi, comme on peut le voir plus particulièrement aux Figures 2 et 3, la nervure 6 est de plus grande longueur que la nervure 7, ceci afin en quelque sorte de mieux fractionner les effets de la dilatation ou de la contraction de la pellicule interne 4. It can be observed that these ribs do not extend over the entire perimeter of the envelope but alternately have small and large lengths. Thus, as can be seen more particularly in FIGS. 2 and 3, the rib 6 is of greater length than the rib 7, this in a way in order to better fractionate the effects of the expansion or contraction of the internal film 4 .
Dans certains modes de réalisation, au lieu de disposer de nervures situées dans des plans concourant sur l'axe de révolution 11 de l'enveloppe ou dans des plans sensiblement parallèles audit axe, on pourra répartir des nervures circulaires dans différents plans superposés, perpendiculaires audit axe. De la sorte, les phénomènes de dilatation et de contraction seront limités dans certaines zones déterminées plus particulièrement sensibles à ces phénomènes. In certain embodiments, instead of having ribs located in planes concurrent on the axis of revolution 11 of the envelope or in planes substantially parallel to said axis, it is possible to distribute circular ribs in different superposed planes, perpendicular to said axis. In this way, the phenomena of expansion and contraction will be limited in certain specific areas more particularly sensitive to these phenomena.
Il pourra même être également utile avec certains filtres, d'associer ces nervures circulaires à celles de l'exemple illustré, de telle façon que l'enve- loppe du corps de filtre ne présente en quelque sorte aucun point mort. It may even be also useful with certain filters, to associate these circular ribs with those of the example illustrated, so that the envelope of the filter body does not in any way have any dead center.
Un autre avantage de la distribution des nervures selon les schémas ci-dessus énoncés est d'améliorer notablement la résistance mécanique des filtres aux charges qu'ils subissent lors doreur emploi. Another advantage of the distribution of the ribs according to the above-mentioned diagrams is to significantly improve the mechanical resistance of the filters to the loads they undergo during gilding.
De préférence, ces nervures sont constituées par des éléments de renfort 12 disposés entre la pellicule interne 4 et la pellicule de revêtement 5 comme celà apparaît clairement sur la vue de détail agrandie de la Figure 4. Preferably, these ribs are constituted by reinforcing elements 12 disposed between the internal film 4 and the covering film 5 as this appears clearly on the enlarged detail view of FIG. 4.
Ces éléments de renfort pourront être réalisés dans tout matériau, métallique ou autre, présentant un coefficient de dilatation moindre que celui du matériau de la pellicule interne 4.These reinforcing elements may be made of any material, metallic or otherwise, having a lower coefficient of expansion than that of the material of the internal film 4.
Conformément au procédé de l'invention, ces éléments de renfort seront mis en place après moulage de la première pellicule 4 et avant la pose de la pellicule de revêtement 5 et, dans une forme de mise en oeuvre possible de ce procédé, des rainures 8, 9,...etc, seront ménagées dans la paroi interne de l'enveloppe 1 lors du moulage de ladite première pellicule, lesdites rainures étant destinées au logement des éléments de renfort. In accordance with the process of the invention, these reinforcing elements will be put in place after molding of the first film 4 and before the laying of the covering film 5 and, in one form of possible implementation of this process, grooves 8 , 9, ... etc, will be formed in the internal wall of the casing 1 during the molding of said first film, said grooves being intended for housing the reinforcing elements.
Selon la nature du matériau employé, les éléments de renfort pourront être mis en place de toute manière appropriée. Toutefois, il sera souvent préférable d'utiliser une matière plastique composite du type polyester qui sera alors coulée, principalement dans les rainures 8, 9, de façon à former un réseau de nervures sur la pellicule 4. Depending on the nature of the material used, the reinforcing elements can be put in place in any suitable manner. However, it will often be preferable to use a composite plastic material of the polyester type which will then be cast, mainly in the grooves 8, 9, so as to form a network of ribs on the film 4.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8910319A FR2649906A1 (en) | 1989-07-18 | 1989-07-18 | Plastic filter body and its method of production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8910319A FR2649906A1 (en) | 1989-07-18 | 1989-07-18 | Plastic filter body and its method of production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2649906A1 true FR2649906A1 (en) | 1991-01-25 |
Family
ID=9384327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8910319A Pending FR2649906A1 (en) | 1989-07-18 | 1989-07-18 | Plastic filter body and its method of production |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2649906A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2144340A1 (en) * | 1997-02-19 | 2000-06-01 | Aplister Sa | Process for manufacturing swimming-pool filters, and resulting filter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3122501A (en) * | 1960-09-01 | 1964-02-25 | Purolator Products Inc | Fuel filter |
| FR1541025A (en) * | 1967-08-01 | 1968-10-04 | Prec Mecanique Labinal | Improvements to filters, in particular of the replaceable type, and more especially of plastic |
| US3727764A (en) * | 1971-11-22 | 1973-04-17 | H Ogden | Filtering apparatus having an integrally removable filter cartridge |
| US4515692A (en) * | 1983-05-06 | 1985-05-07 | Water Soft, Inc. | Water filter |
| DE8703213U1 (en) * | 1987-03-03 | 1987-04-30 | Pall Deutschland GmbH, 6072 Dreieich | Plastic housing |
-
1989
- 1989-07-18 FR FR8910319A patent/FR2649906A1/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3122501A (en) * | 1960-09-01 | 1964-02-25 | Purolator Products Inc | Fuel filter |
| FR1541025A (en) * | 1967-08-01 | 1968-10-04 | Prec Mecanique Labinal | Improvements to filters, in particular of the replaceable type, and more especially of plastic |
| US3727764A (en) * | 1971-11-22 | 1973-04-17 | H Ogden | Filtering apparatus having an integrally removable filter cartridge |
| US4515692A (en) * | 1983-05-06 | 1985-05-07 | Water Soft, Inc. | Water filter |
| DE8703213U1 (en) * | 1987-03-03 | 1987-04-30 | Pall Deutschland GmbH, 6072 Dreieich | Plastic housing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2144340A1 (en) * | 1997-02-19 | 2000-06-01 | Aplister Sa | Process for manufacturing swimming-pool filters, and resulting filter |
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