WATER INLET INCLUDING A RACK OR FRAME WITH DRAIN PIPES

Abstract: A water filtration inlet comprises one or several drain pipes (1) of a limited length fitted inside a frame (2) with transport loops (3). The drain pipes are closed at one end, and open at the other end, which latter end is connected to a header box (4) from which there is a water outlet (5) for the filtered water. The water filtration inlet is especially for use of taking in sea water for aquaculture and demineralization plants where water is being turned into fresh water.

Description: 1 Water inlet including a rack or frame with drain pipes This present invention concerns a water filtration in¬ let, especially for use in connection with the catch¬ ment of sea water for aquaculture, the inlet consisting of a rack or frame with drain pipes. In various plants or processing systems sea, lake or river water is being used, taken trough a pipe or open channel to the place of use, or to an intermediate well, from which it is pumped on elsewhere. For many puposes it is desirable to avoid the water being polluted with weeds, particles, or oil, e.g. in connection with the catchment of water for aquaculture, or for demineral ization plants where sea water is being turned into fresh water. It is a known technique to achieve effecient filtration in such plants by letting the catchment take place through a system of long drain pipes buried into the sea bed or lake bottom, in which fashion the surrounding layers of sand or earth will act as the filtrating element. For that purpose, drain pipes made of long plastic tubes are used, around the perforations of which - in order to prevent clogging - a concentrical ring of gravel particles has been glued. This filtration method has various disadvantages, especially when used on the open coast. In areas with strong currents sand may be dislodged, the drain pipes will be exposed, and will be torn or ripped apart. In other circumstances considerable sediments of sand on top of the pipes have been seen, which will also lead to destruction of the inlet, or reduced capacity, making necessary the move of the inlet system, or the establishment of an entirely new one. The establishment and the maintenance of a widespread sea-based drain system is both difficult and costly, and repairs to or OMH S moving the pipe system may cause unacceptably long stoppages, e.g. where an aquaculture is concerned. The purpose of this present invention is to specify embodiments of a Water Filtration Inlet, where the above-mentioned problems of long, buried drain pipes are avoided. The water filtration inlet according to the invention is characterized in that a number of drain pipes of limited length are fitted together inside a portable rack or frame. The drain pipes are closed at one end at the other end connected to a header, which is again connected to a conduit pipe for further transport of the filtered water. The frame is provided with loops to make crane transport possible without damage to the element. The water filtration inlet is to be dug into the sea bed and covered with sand, and the header outlet is connected to the conduit pipe leading to intermediate well or the place of use on land, whereafter a supply of filtered water will be established. The consequence of having the drain pipes together in an inlet frame makes for simple, quick and cheap in¬ stallation. As the drain pipes lie protected inside a frame of limited dimensions they are not, like the long drain pipes, exposed to damage from currents and surf. Furthermore it will be possible to move the water fil¬ tration inlet quickly and cheaply, without damage to the pipes, in case it is necessary because of excessive sanding up or similar. The drawing attached shows O PI ^*N_m fig. 1 a section of one embodiment of a water filtration inlet, and fig. 2 a section of another embodiment of a water filtration inlet. The water filtration inlet consists of drain pipes 1, fitted inside a portable frame 2. The drain pipes which are closed at one end, are at the open end connected to a header box 4, from which there is an outlet 5. The water filtration inlet is provided with loops 3 for use when handling the inlet with a crane. Another embodiment of a water filtration inlet is one where a long drain pipe is rolled up to form a spiral, fitted inside a portable frame. The pipe is closed at one end, the other via an outlet connected to the con- duit pipe. A third embodiments of the water filtration inlet consists of a design where several drain pipes are rolled up in spirals of different diameters, fitted concentrically one inside the other inside the frame. Further, other embodiments may consists of having a frame fitted with both straight and spiralled drain pipes. For all the embodiments described it goes that there is nothing to prevent them from having the sides of the frame delimited by a perforated sheet or plate, or from filling the room between the drain pipes and the sides with permeable material, e.g. gravel. In the event where greater capacity would be needed than the capacity offered by a single element, the out* lets of several elements may be coupled to the same water inlet pipe.

Claims: THIS IS WHAT WE CLAIM: 1. Water Filtration Inlet especially for the use of taking in water for aquaculture, and consisting of a rack or frame fitted with drain pipes, c h a r a c t ¬ e r i z e d i n that one or several drain pipes (1) of a limited length are fitted inside a frame (2) with transport loops (3), and in that the drain pipes are closed at one end, and open at the other end, which latter end is connected to a header box (4) from which there is a water outlet (5) for the filtered water. 2. Water filtration inlet according to claim 1, c h a r a c t e r i z e d i n that the frame (2) con¬ tains several straight and parallel drain pipes (1). 3. Water filtration inlet according to claim 1, c h a r a c t e r i z e d i n that the frame (2) con- tains a single drain pipe (1) rolled op in a spiral. 4. Water filtration inlet according to claim 1, c h a r a c t e r i z e d i n that the frame (2) con¬ tains one or several drain pipes (1) rolled up in spirals of different diameters and fitted concentrical- .ly one inside the other. 5. Water filtration inlet according to claim 1, c h a r a c t e r i z e d i n that the frame (2) con¬ tains one or severeal parallel drain pipes (1) around which there are fitted one or several spiralled drain pipes (1). 6. Water filtration inlet according to claim 1, c h a r a c t e r i z e d i n that the sides of the frame (2) are delimited by a perforated sheet or plate, and that the room between the sides of the frame (2) is filled with permeable material, e.g. gravel 1< IPO ^ &RNAT\<

Inventors: SONDRUP ERIK, SONDRUP, ERIK
Applicants: SONDRUP ERIK, SONDRUP, ERIK
Application year: 1984
Main classification: E03B3
IPC codes: A01K63, B01D35, C02F1, E03B3