FR2566022A2

FR2566022A2 - Admission and retention flaps in a salt-water environment

Info

Publication number: FR2566022A2
Application number: FR8113720A
Authority: FR
Original assignee: Individual
Current assignee: Individual
Priority date: 1974-05-14
Filing date: 1981-07-10
Publication date: 1985-12-20

Abstract

Devices allowing the rapid admission of sizeable masses of water or air, and also allowing the retention of these fluids regardless of the differences in level between the admission or discharge and the water-retaining tanks. It has the form of a sheet 1 which is woven and strengthened, reinforced at the lower two thirds of its surface 9 by laths or internal ribbing, or else any other method. The upper edge 2 has the form of a sheet hound suspended freely in a horizontal section 3. The invention may be used as an admission or discharge flap on tanks exploiting swell energy by difference in level between the crests and troughs of the waves.

Description

La présente invention concerne des dispositifs d'admission ou d'évacuation rapide de masses d'eau importantes dans des cuves exploitant des diffrences de niveau dues à la houle
Dans le domaine de l'exploitation de l'énergie de la houle, plusieurs solutions ont été proposées qui se sont révélées aux essais, soit estrèmement fragiles dans les fortes mers, soit trop sensibles à la corrosion due à l'ambiance saline
Un brevet 8 été déposé le 14 mai 1974 sous le numéro 7417166 proposant une solution dite " Converter " qui pourrait s'affranchir de ces inconvénients et dans laquelle au moins deux cuves sont susceptibles, l'une de se remplir aux crêtes des vagues, l'autre de se vider aux creux.The present invention relates to devices for the rapid admission or discharge of large bodies of water in tanks exploiting level differences due to swell
In the field of the exploitation of the energy of the swell, several solutions have been proposed which have proved to be tests, either very fragile in strong seas, or too sensitive to corrosion due to the saline atmosphere.
A patent 8 was filed on May 14, 1974 under the number 7417166 proposing a so-called "Converter" solution which could overcome these drawbacks and in which at least two tanks are capable, one of filling up at the crests of the waves, l another to empty yourself in the hollow.

Le Converter décrit utilise des clapets travaillant, les uns pour l'admission aux crêtes des vagues à l'ouverture puis se fermant aux creux et les autres se fermant aux crêtes mais s'ouvrant pour l'évacuation lors des creux des vagues
I1 est à noter que les clapets décrits jusqu a présent sont munis de charnières, pièces d'usure extrèmement sensibles aux ambiances agressives salines, ce qui contrarie le bon fonctionnement des clapets
Par ailleurs, les clapets verticaux qui ont été décrits dans certains brevets, malgré leur souplesse espérée, ne semblent pas être le meilleur compromis entre les faibles variations d'amplitude de la houle et les percussions importantes dues aux fortes mers
En définitive, seuls les clapets horizontaux sont à retenir car ils tieanent compte des variations du niveau de la mer, présentent peu d'inertie et sont plus rapides à réparer localement
Nous décrivons ci-après quelques lapets particulièrement adaptés à l'utilisation des converters
La fig. 1 représente l'aspect général du clapet ; il s'agit d'une toile (1), tissée et armée, noyée dans un élastomère
Le bord supérieur de la toile se présente colle un guindant de grandvoile sur un bateau, il sert d'ancrage dans un support (4) après avoir été pincé dans un profilé (3) fig.II, revétu d'une protection en caoutchouc (6).The converter described uses working valves, some for the admission to the crests of the waves at the opening then closing to the hollows and the others closing to the crests but opening for the evacuation during the hollows of the waves
It should be noted that the valves described so far are provided with hinges, wear parts extremely sensitive to aggressive saline atmospheres, which impedes the proper functioning of the valves.
Furthermore, the vertical valves which have been described in certain patents, in spite of their expected flexibility, do not seem to be the best compromise between the small variations in amplitude of the swell and the significant percussions due to the strong seas.
Ultimately, only the horizontal valves are to be retained because they take into account variations in sea level, have little inertia and are faster to repair locally
We describe below some lapets particularly suitable for the use of converters
Fig. 1 shows the general appearance of the valve; it is a canvas (1), woven and reinforced, embedded in an elastomer
The upper edge of the canvas is glued with a mainsail luff on a boat, it serves as an anchor in a support (4) after being pinched in a profile (3) fig. II, coated with a rubber protection ( 6).

Le support, rigidifié sur toute sa longueur, repose sur deux appuis latéraux (7). L'ensemble doit être rapidement remplaçable, des anneaux de prise en facilitant la manutention (5) . The support, rigidified over its entire length, rests on two lateral supports (7). The assembly must be quickly replaceable, grip rings facilitating handling (5).

Le tiers supérieur du clapet est mince, cette caractéristique permet d'obtenir la souplesse désirée de cette partie qui ne sert que de suspens sion à la partie active du clapet
Les deux tiers inférieurs constituent cette partie active et sont à cette fin renforcés pour supporter la pression de l'eau
Nous proposons quelques procédés de renforcement non exhaustifs - des cannelures verticales, tressage ou lattage, l'ensemble étant noyé
dans un élastomère. fig. III et IV - dôme ou coque en acier léger, répartissant la pression de l'eau sur les
surfaces d'appui - Clapet à plusieurs toiles juxtaposées renforcées par une plaque métal
lique
Notons que l'extrémité inférieure du clapet pourra comporter des fentes (8) accompagnant l'écoulement de l'eau avant l'obturation totale de l'orifice (13)
L'ensemble des clapets horizontaux sera monté sur un panneau vertical servant de cadre rigide (10) . Un converter disposera de plusieurs panneaux verticaux dontxla hauteur totale correspond à l'amplitude maximale des plus hasses aux plus hautes marées
Nous décrivons ci-après 2 à titre indicatif, des réalisations de panneaux de clapets s'appuyant sur des traverses bétonnées (11) fig. V et fig.VI . The upper third of the valve is thin, this characteristic makes it possible to obtain the desired flexibility of this part which only serves to suspend the active part of the valve.
The lower two thirds constitute this active part and are for this purpose reinforced to withstand the pressure of the water.
We offer some non-exhaustive reinforcement processes - vertical grooves, braiding or battening, the whole being embedded
in an elastomer. fig. III and IV - light steel dome or shell, distributing the water pressure over the
bearing surfaces - Valve with several juxtaposed fabrics reinforced by a metal plate
lique
Note that the lower end of the valve may have slots (8) accompanying the flow of water before the complete closure of the orifice (13)
All of the horizontal valves will be mounted on a vertical panel serving as a rigid frame (10). A converter will have several vertical panels, the total height of which corresponds to the maximum amplitude of the easiest at the highest tides
We describe below 2 for information, embodiments of valve panels based on concrete sleepers (11) fig. V and fig. VI.

Ces panneaux auront un profil adapté à la pénétration de l'eau (14) ou à son évacuation . Les panneaux d'admission ( fig.V) seront munis de clapets légèrement inclinés à l'intérieur de la cuve pour faciliter l'obturation par l'effet de leur propre poids
Les panneaux d'évacuation (fig.VI) seront disposés à l'extérieur des cuves ; des déflecteurs (15) seront alors installés sur le panneau sous chaque clapet, dans la partie inférieure, de faSon à ce que chaque clapet soit protégé des effets de la houle montante et ne puisse tre reievé These panels will have a profile adapted to the penetration of water (14) or to its evacuation. The intake panels (fig. V) will be fitted with valves slightly inclined inside the tank to facilitate closing by the effect of their own weight.
The drainage panels (fig.VI) will be placed outside the tanks; deflectors (15) will then be installed on the panel under each valve, in the lower part, so that each valve is protected from the effects of the rising swell and cannot be viewed

Claims

I - devices allowing the rapid admission or evacuation of large masses of water or air, also allowing the retention of these fluids whatever the level differences between the admission or evacuation and the holding tanks of water, characterized by the fact tools, are in the form of a woven and reinforced veil, very flexible in the upper third of its surface and reinforced in the lower two thirds by internal grooves or for example by a batten immobilized in a elastomer. This reinforced part is opposite the water or air intake or discharge ports

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2 - Devices according to claim 1 characterized in that the web is suspended freely by its upper edge having the 'shape of a sail luff sliding in a horizontal profile

3 - Device according to claim 1 characterized in that the lower edge of the veil may be provided with vertical slots intended to facilitate and accompany the flow of water when the valve is closed, the slots then being closed at the end of movement

4 - Device according to claim 2 characterized in that the installation and removal of the profile does not require bolting to facilitate maintenance or exchange maneuvers

5 - Device according to claim 4 characterized in that to facilitate the replacement of a set of valves, the latter are mounted on vertical interchangeable panels

6 - Device according to claim 5 characterized in that the water discharge panels are, in their lower part, equipped with deflectors, so that the valves are not driven by the sudden upward movement of the ridges waves