DE3202718A1 - Underground tank for receiving and distributing liquids, in particular for water supply - Google Patents

Abstract

The invention relates to an underground tank (1), in particular for water supply, having a water-storage tank (2) and a valve chamber (3), designed as a separate structural unit, for receiving a hydraulic installation. The water-storage tank (2) is composed of large, horizontal, prefabricated pipes (5) and is designed, between the supply and discharge (20 and 28, respectively) as a closed, tubular and flow-through body. Supply to the water-storage tank is effected tangentially with respect to the base and approximately perpendicularly to the longitudinal axis of the water-storage tank or the water chamber. Discharge from the water-storage tank is effected essentially parallel to the longitudinal axis of said storage tank, likewise at the bottom of the pipe tank. In this way, water flows through the water-storage tank (2) in a helical manner, with the result that excellent thorough mixing of the stored water is achieved, without any "dead" or insufficiently flowed-through areas occurring within the storage tank. <IMAGE>

Description

3202718 UweCzyhuäka? Patent attorney

Maximilianstrasse 15 D-8000 Munich 22

Tel .: (089) 295201 Telex: 523514

3 177 ch

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Siegfried Schulz, Hirschbergstr. 21, 8150 Holzkirchen

Ground containers for holding and distributing liquids, in particular for water supply

The invention relates to an earth container according to the preamble of claim 1.

In DE-OS 29 07 140 of the applicant

describes an underground tank, in particular for water supply, a water storage tank and a separate control room, i.e. a valve chamber Has recording of the hydraulic installation. The storage tank is composed of large horizontal prefabricated pipes and formed between the inlet and outlet as a closed tubular through-flow body. The inlet and outlet flow into the Slide chamber and lead from there e.g. to a conventional pump room.

As stated in the above patent application, the training provides of the water storage tank as a horizontal pipe tank made of prefabricated

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Partial large pipes have significant advantages over conventional ones Design type. The following advantages in particular should be mentioned here:

'- unproblematic statics;

- Simple construction without complex construction site equipment

- high security in terms of building regulations and hygiene . ■

- very good flow through the tube container;

- Diverse expansion options for larger capacities, e.g. by extending the tubular container or attaching additional pipe containers;

- practically no influence on the landscape.

For the water freshness and water hygiene of the water stored in an underground tank, a flow is above the entire water cross-section with constant water flow necessary, without leaving dead or insufficiently perfused areas due to water eddies, for example. An elongated tubular container, as he said in the aforementioned patent application de Applicant is described, has considerable advantages in terms of Durchströmun 'due to the geometric shape usual basin-like reservoirs, which are designed as solid structures; see Mutschmann, Stimmelmayr, Pocket book of water supply, 7th edition, Frankhsche Verlagshandlung Stuttgart, pages 589 to 593. Also with so-called Spiral containers according to DE-AS 22 58 507, in which the water flow is forcibly guided, can be caused by vortex formation Inadequate due to different flow velocities on neighboring container walls due to the formation of eddies flowed through areas arise.

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For all water storage tanks for water supply, in addition to the continuous flow through the storage tank, the stored water in the container are mixed well in order to keep the drinking water fresh. Of course the problems of mixing and flow are closely related.

In the above-mentioned publication by the applicant, in proposed the embodiment for the inlet and outlet; to provide a distributor that almost covers the entire cross section of the tube container. This gave good results in terms of flow and mixing achieved in model tests.

The invention is based on the object of constructing the water flow in the area of the inlet and outlet of the pipe container to simplify and at the same time good flow through the pipe container and good mixing of the stored water reach.

According to the invention, this object is achieved by the characterizing features of patent claim 1.

According to the invention, water is in the tubular water reservoir introduced at the bottom tangentially and essentially perpendicular to the longitudinal axis of the accumulator. The lead-in angle will usually be 90 °, but deviations from this are also possible, provided that. e.g. ensured by several inlets is that in the area of the inlet there are no "dead spots" arise in the stored water. If the water is fed into the tubular container, it is approximately perpendicular to its longitudinal axis tangentially to the container bottom, only one inlet is necessary. The supplied water then flows through the entire container approximately helically over the entire water cross-section, regardless of the respective filling

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stand of the pipe container. This way all areas are of the tubular reservoir flows through continuously, so that leash "dead spots" can form. Remarkable here is that the complete flow and mixing - regardless of the level in the tube container and also independently of the relationship between inflow and outflow volume could be observed in model experiments.

In the aforementioned Offenlegungsschrift 29 07 140 by the applicant has also been proposed, two each of the sliding chamber outgoing parallel tubular container at their remote Connect the ends with a U-shaped elbow. Due to the helical flow with tangential inlet of the fed-in water, there were almost no backflows in this area due to different currents Flow velocities on adjacent pipe walls of the container. However, it was found that the flow and mixing in this area can be further improved. The two water spouts are used for this purpose designed as an elongated tubular container, the drain from the first water reservoir at its end at the Sole of the tubular container branches off essentially parallel to the longitudinal axis of the container. This drain pipe then becomes the neighboring one Out at the end of the second water reservoir and mouth in this as an inlet tangentially substantially perpendicular to the longitudinal axis of the container of the second water reservoir in this one. This type of axially parallel discharge from the water storage tank is particularly advantageous because it prevents backflows or vortex formation that would "kill" Places "in the tubular container. This non-return flow The drainage of the stored water is also independent of the fill level, the flow rate and the relationship between the inflow and outflow quantity.

5 In a constructed according to the invention water storage \ the total capacity of the stored water over the entire cross-section through water flows very well and durchmiscl

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without causing insufficient flow in places in the area of the pipe container or on the surface of the water comes.

The invention is explained in more detail in an exemplary embodiment with reference to the drawing. Place in the drawing dar:

Figure 1 is a schematic plan view of an earth container according to the invention with from large f pipes assembled water storage tanks, one accommodating the hydraulic installation Slide chamber, as well as a pump room;

Figure 2 shows a cross section through the slide chamber

and part of the water reservoir, along the line 11-11 + in Fig. 1;

FIG. 3 shows a longitudinal section through the first slide chamber and part of the pump chamber.

An underground tank 1 for supply of drinking water is 2 _g in a water storage of six water chambers to 2, from three individual spool chambers divided 3 to 3 .. _3, and a pump chamber 4, a valve chamber. 3 The individual water chambers are each flat-lying long pipe container made of large-caliber prefabricated pipes, which are laid on the bottom of a excavated construction pit. The individual pipe containers are composed of ring pipe elements 5, for example with a nominal width of three meters. The laying of such pipes from ring elements is known and therefore does not need to be described further.

The individual chambers 3 ... to 3, the slide chamber, the COPY. '

directly adjoining the pump room 4 are cuboid prefabricated parts, such as those used for the construction of prefabricated garages. On the two opposite longitudinal walls of each slide chamber part 3 ... to 3, a water chamber opens, the longitudinal axis of which is normally perpendicular to the longitudinal axis of the slide chamber. The water chambers 2 and 2 are connected to the valve chamber part 3 .., the water chambers 2 and 2 with the valve chamber part 3 and the water chambers 2 and 2 with the valve chamber part The first ring elements 5 resting on the valve chamber the individual water chambers are each closed with a cover 8, which has a pressure door 14 to access the individual water chambers, which in turn is provided with a viewing window 75 made of armored glass for inspection of the water chambers. The ends of the individual water chambers that are remote from the slide chamber are also closed with lids.

An inlet pipe 16, an outlet pipe 17 and two base outlet pipes lead from the pump chamber into the slide chamber 3 18. The bottom drainage pipes are below the bottom of the individual water chambers. In the valve chamber is A grate 19 that can be walked on is provided above the said pipes.

From the inlet pipe 16 branch off in the first and third slide chamber part 3 and 3 respectively two inlet lines 20 and 20 or 20 and 20, which pierce the slide chamber side walls and into the first ring element 5 of the associated water chambers 3 ..., and 3. and 3, respectively, and introduced tangentially 3 in the immediate vicinity of the end cover 8 to the water chamber sole in this, - see also Figure 3, in which the guide of the feed line 2O ₁ 2 shown in the first water chamber.. There is one in each of the supply lines

Inlet slide 21 is provided.

The water chambers 2. and 2 ″ are connected to one another at their ends remote from the slide chamber 3 with a connecting pipe V, as are the water chambers 2. and 2 _ς . The connecting lines V run axially parallel to the tube containers 2 .. and 2, respectively at the sole of a flow lines 28 and 28, respectively .. ₄ from the water chambers 2 .. and 2, respectively, and are tangential to the sole of the adjacent water chambers 2 ₂ out or 2 _{5 introduced} as feed lines 2O ₂ or 20. The tangential feed takes place in the same way as is shown in FIG. 3 for the feed line 2O ₁ .

From the water chambers 2_ and 2, - run from their end faces connected to the valve chamber part 3_, drain lines 28 which are guided axially parallel to the bottom of the individual water chambers into the valve chamber 3 and are passed through a drain valve 29 into the drain pipe 17; this is in Figure 2 for the drain line 28- from the water chamber 2 _? shown as an example. The water supplied via the inlet pipe 16 accordingly flows one after the other through the water chambers 2 and 2_ or 2 and 2 ~> before it is passed via the discharge lines 28 into the discharge pipe 17.

The water chambers 2_ and 2 are each individual chambers,

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into the water via the inlet pipes 2O ₃ 'resp. 20, flows in tangentially on the ground. The water is drawn off at the end of these water chambers at the bottom, which is remote from the valve _{chamber 3, axially parallel via drain lines 28_ or 28g, the drain lines 28 and 28 ß} being guided along the chambers in the valve chamber part 3. There they open into the drain pipe 17 via the drain slide 2 9.

The water chambers each have an overflow line on their end faces connected to the slide chamber 3, which penetrates the cover 8 in the vicinity of the ceiling of the respective water chamber and is guided into the bottom outlet pipe 18 via a non-return plate 26. The overflow lines are used to drain excess water if the water storage tank is full. In addition, all water chambers are provided with ventilation ducts 27 which each lead vertically upwards from the ceiling of the first ring element of the individual water chambers adjacent to the slide chamber and then open into the slide chamber in a ventilation duct. As shown in FIG. 3, this collecting pipe is routed into the pump chamber 4, for example.

In addition, at least some water chambers still have bottom drain lines 32, which lead vertically down from the bottom of the respective water reservoir and into the valve chamber and are introduced into the bottom drain pipe 18 there. In the bottom outlet lines are within the slide chamber bottom outlet slide 33 is provided. These bottom drain lines are used for complete emptying of the individual water chambers, e.g. after cleaning and rinsing.

The water reservoir is usually supplied with a constant amount of water per unit of time via the inlet pipe 16, while an amount of water per unit of time which varies depending on the water requirement of the withdrawal points connected to the water storage unit is withdrawn via the outlet pipe 17. In Figure 3, the filling level F is shown schematically for the water chamber 2 _1. The fill level in the other water reservoirs is similar and only fluctuates slightly depending on the amount of water withdrawn. If water is introduced tangentially into the partially filled water chamber 2. via the feed line 2O _{1, so}

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Due to the circular cross-section and the longitudinal flow, a helical flow S arises in the water chamber over the entire filling cross-section. This helical flow is maintained over the entire length of the water chamber 2, regardless of the respective filling level F. This results in an excellent mixing of the water chamber contents without "dead" or insufficient flow positions remaining. The axially parallel withdrawal of the water from the water chamber 2 via the drainage line 2S ₁ near the bottom also prevents backflows from forming within the water chamber, which could also lead to areas with insufficient flow. Similar flow conditions are of course also established in all other water chambers 2_ to 2 _ß , since the water is introduced tangentail into these as well and withdrawn axially parallel. This excellent flow through the water reservoir and mixing of the stored water is observed regardless of the filling quantity and the flow rates,

Claims (4)

3202718 Haft · Berngruber · Czybuücsr patent attorneys .3177 / ch Siegfried Schulz, Hirschbergstr. 21, 8150 Holzkirchen Ground containers for holding and distributing liquids, in particular for water supply Claims Containers for holding and distributing liquids, in particular for supplying water with a water reservoir (2) and a slide chamber (3) designed as a separate unit for receiving hydraulic installations, wherein the water storage tank (2) is composed of large horizontal prefabricated pipes (5) and is positioned between the inlet and outlet (20 or 28) is designed as a closed tubular through-flow body, with inlet and outlet in the slide chamber open, characterized in that the inlet (20) in the water reservoir (2) in the Tubular container opens at the bottom tangentially and essentially perpendicular to the longitudinal axis of the container. COPY O Δ Ό LI 2. Container according to claim 1, characterized in that the drain (28) from the water reservoir (2) at its end the bottom of the tubular container branches off essentially parallel to the longitudinal axis of the container. 3. Container according to one of claims 1 and 2, characterized in that that the water reservoir (2) consists of several parallel in each case from the slide chamber (3) outgoing, as Rohrbe container trained water chimneys (2 to 2) composed is, each on one end face a tangentic inlet (20) and on the other end face an outlet (2 £ exhibit. 4. Container according to claim 3, characterized in that the outlet (28, 28) from a water chamber (2, 2.) at the end of the slide chamber (3) remote with the tangential! Is inlet (20 ", 2O. ₁₎ of the adjacent water chamber (2, 2 _ζ) at the remote also from the valve chamber (3) connected end. COPV