DE2342962A1 - PROCEDURE FOR THE PROVISIONAL STORAGE OF WATER FOR USE AT PEAK TIME OF DEMAND - Google Patents

Description

OZ no .: 73076

DYNAMIT NOBEL AKTIEIiGESELLSCHAFT 521 Troisdorf, district of Cologne

Procedure for the temporary storage of water for use during peak periods of demand

The present invention relates to a method for provisional Storage of water for use at peak times of demand.

Difficulties in the water supply arise z. B. often in recreational areas, because the normal consumption of drinking and / or service water of the resident population occurs a seasonal additional consumption during some Months by tourists, which on weekends is still overshadowed by consumption by day trippers. It happens a lot to the collapse of the water supply. A short-term peak demand does not justify high investments because corresponding conventional solid containers would remain unused for a large part of the year.

The object was therefore to eliminate the disadvantages mentioned.

The invention achieves this object, the temporary storage of water for use in periods of peak demand, in such a way that the · supply of water in to a supply network can be connected on all sides from the walls of flexible plastic webs _f which are welded or glued, be stationary storage container, preferably to the limit of capacity, e inpumps.

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The storage containers can either be stored in hilly terrain, if possible in a hollow. Here fit the bottom and the side walls due to their flexible training the shape of the trough. The storage location is expediently close to a normal elevated tank and, if possible, higher than the same, so that an immediate connection is given when use is required.

To protect against damage to the floor, the storage container is in the form of a bubble on a layer of sand and / or foam placed. To protect against heating from above, this reservoir is also covered with a foam layer and this again with a light- and weather-resistant cover made of plastic, e.g. PVC soft roof sealing sheeting. All sliding parts are welded together at the edges.

If necessary, the entire hollow can be equipped with an additional tent, e.g. in the form of a statically indeterminate cable structure be reconsidered. That from deep wells, high springs or the like. won After treatment, fresh water is fed into the existing water tanks (water tower, elevated tank), and In addition, using the existing pump capacity, additional drinking water is added to the prepared additional Storage container made of plastic.

In the event of peak demand, the main container is emptied (Water tower) the further water supply from the temporary reservoirs, with the respective main container already being refilled with the pump capacity that has been released can be.

In the lowlands, the supply is only provided via the high water tower, into which the drinking water from the reservoirs passes an additional pump is continuously fed in.

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If there are bodies of water, for example a lake or B ¹ IuB, they offer particularly economical storage for the storage containers according to the invention.

According to the invention, the storage container is provided with a ballast buoyancy system supplemented, which makes it against drifting (if necessary by additional Anchoring), but can also be made mobile by floating.

There may be several in the recreation areas, depending on the agglomeration Units can be coupled to one another and also floated in at the required points. The masses to be moved are very small and are only the weight of the shell, reduced by the weight of the water displacement. In the main the stagnation resistance against the Vfasser has to be overcome. Filling with drinking water can be done elsewhere depending on free capacities of existing pumps from deep wells, high springs or treatment plants on the lake.

The storage water is protected from sun rays, especially UV rays largely protected when stored in water and therefore remains relative if the storage depth is sufficient cool.

In a further development of the invention, the storage containers have an attached circumferential loops on the sides, eyelets or the like. provided retaining strip for attaching a Ballast hose and a buoyancy hose, optionally subdivided into chambers. The storage containers are useful on the top with an access opening with a watertight and a lockable vent valve provided lid, for example to facilitate internal cleaning.

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The temporary drinking water container according to the invention therefore consists of a water-resistant and flexible plastic film in sufficient thickness, e.g. PVC-v / calibrated, whereby the individual Plastic sheets are welded together in a watertight manner to form a container that is closed on all sides.

In the drawings, the invention is shown schematically in exemplary embodiments and is explained on the basis of these. Show it:

FIG. I shows a vertical longitudinal section through one; water storage tank stored in a trough

1a and 1b, in extracts, are cross-sections from the endings

of the container according to Figure I. j

FIG. II shows a plan view of the container according to FIG

drawn vertical cross-section ι

FIG. III shows an excerpt from a schematic cross section j for a pre to be stored in a body of water

storage tank.

According to Figure I, the water reservoir 4 is stored in the trough 1 on the rolling gravel layer 3, with the upper edge of the Wall 2 can be heaped up. The storage place is preferably chosen next to an existing water tank, so that in the event of a peak demand after emptying the main reservoir, the further water supply from the provisional Reservoirs takes place during this time

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It is already possible to refill the main reservoir again is. To protect against damage, the walls 5 are covered with protective layers 6 made of foam, e.g. Covered from soft PVO. The top side is on the protective layer 6 the lightfast and weather-resistant cover film 7 is still applied, e.g. made of soft PVG. The closable inlet and outlet 8 is stored approximately at the lowest point. To cleaning and repair purposes, the manhole 9 is with Lid and lockable vent valve provided.

Figures Ia and Ib represent cross sections on an enlarged scale of the walls 5 of the container 4 with the protective layers, Figure Ia of the upper wall and Figure Ib corresponds to the lower or the side wall. With a container of e.g. 30 m length, 15 m width and 2 m depth For example, layers 5 and 7 are made of a soft PVC film each 1.5 min thick and the foam layer out Soft PVC foam 6.8 to 10 mm thick.

FIG. II shows the top view of the trough 1, with a vertical cross section of the container 4 to be stored Section B-B is shown in Fig. I. The lowering of the The container bottom in the direction of the inlet and outlet 8 is indicated by arrows in Figures I, II, it is e.g. 3 $.

In FIG. III, in a partial longitudinal section, the container 10 for underwater storage with the welding or gluing points is shown 10a, 10b shown. The container 10 carries an expediently circumferential welded or glued one Retaining strip 11, od with omissions such as loops, eyelets. The like. At required intervals for fastening the Ballast (12) or buoyancy device (13).

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The ballast or buoyancy device 12, 13 each consists of a continuous hose made of weather-resistant Plastic, e.g. B. Soft PVO, the above and below the Holding strip 11 and through its openings with each other and interchangeable by means of non-rotting Ropes 14, e.g. made of polyester, are connected to fastening straps 13a, 12a. ;

The distance between the two round tubes 12,13 is Half of the expected thickness of the drinking water tank when full, whereby the filling is not substantial Preserves overpressure and does not contain any air pockets target. I.

The lower tube 12 is ballasted, e.g. B. sand, filled and sized so that the ballast the filled container can hold on to the bottom of the lake even in storms and water currents (if necessary with anchors or the like).

The upper hose 13 is filled with air for floating and transporting the drinking water container. It is so dimensioned that he can carry both the ballast 12 and the weight of the container and the two hoses with fastening ropes.

Is of major advantage. here that the weight of the water filling the Eehälters is equal to zero, since the Container is in the same medium and the dead weight of a container that is under water to the weight the water displacement is reduced.

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The individual containers can also be attached to the holding strips 11 be coupled lengthwise or crosswise to each other and via a towing device to a motorboat.

The containers are filled and emptied with drinking water and the ballast or buoyancy hose with sand or air Via commercially available valves with locking devices (e.g. bayonet lock for fire department hydrants).

TJm to have the possibility of an inlet or outlet connection from the inside to be used or to carry out internal cleaning in the event of excessive germination after prolonged storage, the containers receive a manhole with a press cover and seal at the top. The vent of the The cavity created when filling is carried out through a vent valve with a shut-off on the cover of the entrance. It also enables the drinking water tank to be vented during operating hours.

The described facilities are handled as follows:

The container 10 filled with drinking water lies at the bottom of the lake and is connected to the drinking water supply network by a vacuum pump connected. Therefore, the natural water pressure above the container becomes effective and pushes the flexible one Container together. After emptying the container, compressed air is given into the upper (buoyancy) hose 13, whereby the entire empty container in the form of two tightly pressed together Plastic layers are drawn to the surface and again stationary or elsewhere Drinking water can be filled.

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For lowering the buoyancy air is let out of the buoyancy tube 13, whereby the ballast that is constantly present 12 takes effect and sunk the filled container back to the seabed.

A plastic container of the type described for the temporary storage of drinking water still brings in one a significant advantage in a different way than was previously possible.

By completely excluding outside air from the filling With drinking water, the germination of the drinking water, which is to be feared, is only dependent on the germ content of the drinking water itself dependent, and that can be controlled before backfilling.

Plastic sealing sheets of the intended type are produced at approx. 200-250 ^° C. and are therefore absolutely sterile during production. In the production of the drinking water tank, whereby prefabrication is to be provided if possible, an infestation with microorganisms during the production by a suitable workflow, eg. B. be largely avoided by laying the inner side of the freshly unrolled sealing sheets on top of each other.

In unfavorable cases, e.g. if microorganisms occur in the drinking water or if the treatment plant fails, is the sterilization of the container with appropriate solutions are possible with little effort and only requires one or two tank fillings with water.

With the method described above, it is possible, in each case discontinuously, for a short time and for only a limited time Peak demand for drinking water in changing metropolitan areas and times due to flexible, mobile and combined £ in-

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! to cover units of containers made of plastic sheeting.

j This largely eliminates the need for earthworks and concrete

i owners themselves do not require any between vacation periods

! Maintenance.

Troisdorf, August 13, 1973 MG / P. OZ 73076

50981 1/047

Claims (13)

Patent claims: 1. Procedure for temporary storage of water used at peak times of demand, characterized by that the reservoir water in connectable to a supply network on all sides from walls flexible plastic sheets that are welded or glued together, existing storage containers, preferably up to is pumped in to completely exclude air. 2. The method according to claim 1, characterized in that the storage container is housed in a trough, wherein their underside and the side walls adapt to the shape of the trough. 3. The method according to claim 1, characterized in that the storage container in a lake or river below the surface .che or be kept at the bottom by means of an additional ballast and by pumping with compressed air from with the Reservoir connected swim bladders are brought back to the surface. 4. Storage container for carrying out the method according to claim 2, characterized in that the container on the ground and on the side walls on an outer protective layer, e.g. made of flexible plastic foam and on the top a heat protection ^ e.g. made of plastic foam, as well has a flexible cover film. 5. Storage container for carrying out the method according to claim 3, characterized by a container (1) on the sides a horizontally circumferential, with loops, eyelets or the like. more assured Retaining strip (2) for attaching a ballast hose (3) and one, possibly divided into chambers, Buoyancy tube (4) is attached. -2- 509811/04 74 - t- ; 6th Storage container for carrying out the method according to Anj Spruch 2 or 3> characterized in that he is on the Top an entry opening with a waterproof ^! attached, with a lockable vent valve i has provided lid. Troisdorf, the 13th August 1973
MG / P. OZ 73076 50981 1 / (K 7 U