EP2508686B1 - Retention assembly for precipitation and waste water - Google Patents

Description

The present invention relates to a retention system for precipitation water and wastewater according to the preamble of claim 1.

Technological background

Corresponding restraint systems serve to ensure a buffer effect in a sewer during a sudden attack of increased water masses, in particular due to heavy rainfall events. For this purpose, at special, intended places in the sewer network storage spaces and a possibility of escape of water provided in order to achieve a relief of the channel system. This is comparable to a pressure relief valve in the conventional sense of the art. Specifically, this is a storage space channel between an inlet and a spout used by accumulated in an increased accumulation of water mass transported from the sewer mixed water (rainwater and wastewater) and, when exceeding a certain level in an overflow shaft, with a discharge channel in Connection stands, escapes. When discharging water, it must be ensured that coarse matter, e.g. Suspending agents and contaminants are retained in the sewer system. In order to hinder the coarse material in the waste water from entering the discharge channel, retention devices are provided in the area of the overflow shaft.

State of the art

The DE 20 2007 004 927 U1 describes a retention system for rainwater and wastewater according to the preamble of claim 1. This known restraint system comprises a perforated tube, which starts from the inlet an overflow shaft and ends in the region of the transition of the overflow shaft into the reservoir channel. Between the overflow shaft and the storage space, an opening is provided which can be closed by a designed as a floating barrier partition. When the baffle wall is raised while floating on the surface larger dirt particles are held, but suspended below the raised baffle can get into the overflow shaft.

The DE 2010 05 479 U1 describes a restraint system with a straight-line overflow threshold which simultaneously includes a retention grid. The retention system is designed for connection to a storage space channel.

The DE 199 111 248 C1 describes a storage channel for damming particular rainwater in drainage networks of mixing systems. The storage space includes a source pot, at the top of a grid ring is provided.

The DE 37 14 947 A1 shows a retention system for mixed water from waste water and rainwater, in which a double threshold for two-way overflow or a ring threshold for round overflow of the mixed water is provided in the overflow shaft.

The DE 199 16 964 A1 discloses a retention system for rainwater and wastewater, through which runs from the inlet to the outlet of the storage space channel a mixed water channel of compared to the storage space channel reduced diameter, which perforations of predetermined size to pass through of water, with coarse materials, such as suspended solids and / or contaminants, however, to be retained. The precipitation water and waste water, which contain suspended matter and / or contaminants, flows from the inlet through the mixed water channel to the outlet of the reservoir channel. When an increased seepage of water mass occurs, the amount of water in the mixed water channel swells and flows through the perforations into the reservoir channel. Due to the reduced diameter of the mixed water channel, however, a high degree of contamination (especially due to dissolved cellulose components, fabric components, etc.) may cause the contamination to reduce the permeability of the perforations, with the result that this leads to increased pressure due to lifting the manhole cover above the retention system leads or it even comes to a bursting of the mixed water channel and consequent to an uncontrolled entry of coarse material into the overflow shaft. The release effect is then no longer guaranteed. In addition, the restraint system has to be repaired.

Object of the present invention

The object of the present invention is to provide a restraint system of the generic type with improved performance.

Subject of the invention

The present object is achieved in the generic restraint system by the characterizing features of claim 1.

Advantageous embodiments of the present invention are claimed in the subclaims and described in the drawing figures.

Through the use of an elongated, extending from the overflow shaft along the storage space channel in the direction of the outlet retaining element is possible that the entire storage space channel is available as a storage volume for the precipitation water and wastewater and thus the retention or separation function of the retaining element only begins when the Stowage channel is filled in its capacity as mixed water storage to a certain extent. Due to its elongated shape, the retention element provides an overall increased retention performance compared to a retention rake that is usually positioned directly in the overflow shaft. Due to the design, there may be no rupture in the restraint system according to the invention, since the rainwater and wastewater from the inlet directly into the large volume storage space channel and from there into the outlet and the passage is not limited by an additional channel.

Conveniently, at least one retaining channel provided with passages is provided in the overflow shaft as a retaining element extending from the latter along the reservoir channel in the direction of the outlet. The accumulating from the reservoir channel rainwater and sewage fills with appropriate attack the reservoir channel and flows as soon as the water level reaches the retention channel in this radially. From the retention channel, the water then flows into the overflow shaft. By design, it is sufficient if the retaining channel extends only over a partial length of the storage space channel in the direction of the outlet. Since the retaining element or the retention channel does not have to extend through the entire storage space channel as in the prior art mentioned at the beginning, but extends only over a partial area in this, it is possible to retrofit existing retention systems in a simple manner.

The passages on the retaining element are suitably selected by their arrangement, dimensioning, shaping or a combination thereof such that suspended matter such as e.g. dissolved or undissolved cellulose components, tissue components and dirt of any kind are retained so that the latter or the latter does not get into the overflow shaft.

The fact that based on the cross-sectional area of the storage space channel, a portion of the storage space above and a portion of the storage space channel is below the retention channel, there is the advantage that the retention channel with filled reservoir channel neither in the lower sedimentation, in which contaminants are increased, still in the Upper area of the storage space channel, in which floating matter and / or suspended matter occurs more frequently, is located. In this way, the risk of an increase in the passages of the retaining channel is additionally reduced, advantageously begins an effective flow of the retention channel only after complete filling of the storage space volume including the volume of the overflow shaft.

Conveniently, the retention channel is located substantially in the middle region of the storage space channel.

By virtue of the fact that a plurality of retention channels, preferably arranged parallel to one another relative to the cross-sectional area of the storage space channel, can be provided, the retention effect within the storage space channel can be "duplicated" in a simple manner.

Conveniently, the respective retaining channel by means of fastening elements, such. by means of pipe clamps or by means of a support frame, positioned in the storage space channel. The fastening elements are preferably made of metal or plastic. As a result, the possibility is created to use the retention channel in the radial direction in full, so as to ensure a particularly high retention effect.

Alternatively, it is also possible to connect a wall area provided with passages to the inner wall of the storage space channel and thus to create a retaining channel formed by both parts.

Appropriately, such a retaining channel has a tapered bottom and top.

Preferably, the passages of the retaining channel are slit-shaped or perforated.

For this purpose, the retaining channel or the wall region to form a retaining channel have a grid-like structure.

Description of embodiments of the invention

Fig. 1

eine zweckmäßige Ausgestaltung einer Rückhalteanlage gemäß der vorlie-genden Erfindung in stark vereinfachter seitlicher Darstellungsweise;

Fig. 2

einen horizontalen Schnitt durch einen den Rückhaltekanal umfassenden Bereich der Rückhalteanlage;

Fig, 3

einen Querschnitt durch die Rückhalteanlage gemäß der Ausgestaltung nach Fig. 1in Querrichtung zum Rückhaltekanal;

Fig. 4

einen Querschnittsdarstellung entsprechend der Fig. 3 einer alternative Ausgestaltung eines Rückhaltekanals sowie

Fig. 5

eine Querschnittsdarstellung entsprechend der Fig. 3 einer weiteren alter-nativen Ausgestaltung eines Rückhaltekanals.

Advantageous embodiments of the present invention will be explained in more detail below with reference to drawing figures. Show it:

Fig. 1

an expedient embodiment of a restraint system according to the present invention in a greatly simplified lateral representation;

Fig. 2

a horizontal section through a region of the retention system comprising the retention channel;

Fig. 3

a cross section through the restraint system according to the embodiment according to Fig. 1 in the transverse direction to the retention channel;

Fig. 4

a cross-sectional view corresponding to the Fig. 3 an alternative embodiment of a retaining channel as well

Fig. 5

a cross-sectional view according to the Fig. 3 a further alternative embodiment of a retention channel.

Reference numeral 22 in Fig. 1 shows an expedient embodiment of a retention system according to the invention for rainwater and wastewater in their entirety. The retention system 22 comprises a large volume storage space channel 5 located between an inlet 1 and outlet 2, which serves as a buffer for mixed water (precipitation water and waste water) at an elevated level Accumulation of water is used. The inlet 1 in the storage space channel 5 is connected to a z. B. through the lower portion of a overflow shaft 3 guided pipe with a (not shown) sewer network in connection. The overflow shaft 3 has an overflow 24, which leads to the outside in a discharge channel 4. The entire retention system 22 is located in the ground. Via access shafts 18, 19, 20 and 21, an access in the area of the overflow shaft 3, two accesses in the region of the storage space channel 5 and an access in the area of the throttle shaft 23 are provided.

The retention channel 6 or 8 in Fig. 1 It leads to a in the overflow shaft 3 and extends from there, starting in the direction of the outlet 2 over a partial length of the storage space channel 5. At the end face, the outlet 2 facing the end of the retaining channel 6, 8 is located a respective respective end plate 16, 17. The respective retaining channel 6, 8 is provided with a plurality of passages 7 in order to ensure a water passage from the storage space channel 5 into the respective retention channel 6, 8.

In the normal case, wastewater flows from a (not shown) sewer system via the inlet 1 in the storage space channel 5 and from this via the outlet 2 again in the (not shown) sewer system back. In the case of a sudden increase in the amount of water due to a cloudburst or the like. Flows a multiple of rainwater together with the sewage system located in the sewer system into the storage space channel 5 and accumulates due to the small-sized spout 2 within the storage space channel 5 quickly.

This expresses how out Fig. 2 4, the water located inside the storage space channel 5 (see the transverse arrows) enters the respective retention channel 6 through the plurality of passages 7 and flows through the water at the mouth region of the respective retention channel 6, 8 Passageways 14, 15 in the longitudinal direction from the respective retention channel 6, 8 (see longitudinally oriented arrows) in the overflow shaft 3. When passing the wastewater and rainwater coarse material, eg suspended matter and / or contaminants on the outside of the respective retention channel 6, 8 collected, so that the cleaned water can flow into the overflow shaft 3. Once the water in the overflow shaft 3 has risen above a certain level, it flows into the overflow 24 (curved arrows in Fig. 2 ) and is derived to au-βen (straight-line arrows in Fig. 2 ). This can be achieved by simultaneous use of the storage space channel 5 effective discharge of the sewer system with simultaneous cleaning effect.

In the embodiment according to the Fig. 1 and 2 the two retention channels 6, 8 are fully positioned within the storage space channel 5.

The positioning is done as out Fig. 3 can be seen via fasteners, such as over pipe clamps 9, 10, with which the respective retaining channel 6, 8 is fixed to the inner wall 12 of the storage space channel 5 in the upper and lower regions. How out Fig. 3 In addition, the passages 7 are formed as slots 13 or perforation. Preferably, a kind of slot tube can be used for this purpose. The entry of water (see straight line arrows) takes place all around.

An alternative embodiment of the respective retention channel 6, 8 shows Fig. 4 , There is formed via a corresponding wall portion 11, which has respective passages 7 in the form of slots 13, a retaining channel 6 and 8 together with the inner wall 12 of the storage space channel 5. The wall portion 11 is curved in this case. The respective retention channel 6 and 8 runs at both the bottom and on the top pointed. The entry of water over the entire area according to the arrow.

The further embodiment using rectilinear wall regions 11 is made Fig. 5 seen. There, too, the respective retention channel 6, 8 runs pointedly both at its upper and at its underside.

Both embodiments according to the Fig. 4 and 5 is common that the retaining channel 6, 8 is located in the middle region of the storage space channel 5. This results in the advantage that the retention function in the restraint installation 22 according to the invention is set in a region in which there is no increased contamination of sedimentation (lower area of the storage space channel) or no increased pollution due to floating substances and / or suspended particles (upper area of the storage space channel 5) ).

It is expressly emphasized that the subject matter of the inventive idea also includes subcombinations of features of the illustrated embodiments.

LIST OF REFERENCE NUMBERS

1

enema

2

outlet

3

Overflow shaft

4

relief channel

5

Storage sewer

6

Retention channel

7

passage

8th

Retention channel

9

clamps

10

clamps

11

Wall area (retention channel)

12

Inner wall (storage channel)

13

slot

14

Through opening

15

Through opening

16

End plate

17

End plate

18

inspection chamber

19

inspection chamber

20

inspection chamber

21

inspection chamber

22

Restraint equipment

23

throttle shaft

24

overflow

Claims (11)

1. Retaining system for precipitation water and waste water, comprising an inlet (1), an outlet (2), an overflow shaft (3), in particular on the inlet side, which has a relief channel (4), a storage channel (5) which is arranged between inlet (1) and outlet (2), and also an elongate retaining element which, in the case of a build-up of precipitation water and waste water in the storage channel (5), substantially holds back suspended particles and contaminants and allows water to pass through the retaining element to the overflow shaft (3), characterized in that the retaining element extends from the overflow shaft (3) along the storage channel (5) in the direction of the outlet (2).
2. Retaining system according to Claim 1, characterized in that the retaining element provided is at least one retaining channel (6, 8) which is provided with passages (7), opens into the overflow shaft (3) and extends from the latter along the storage channel (5) in the direction of the outlet (2).
3. Retaining system according to Claim 2, characterized in that, apart from the retaining channel (6, 8), the volume of the storage channel (5) is available as a treatment-free storage volume between inlet (1) and outlet (2).
4. Retaining system according to Claim 2 or 3, characterized in that, based on the cross-sectional area of the storage channel (5), a part of the storage channel (5) is situated above the retaining channel (6, 8) and a part of the storage channel (5) is situated below the retaining channel (6, 8).
5. Retaining system according to Claims 2 to 4, characterized in that, based on the cross-sectional area of the storage channel (5), the retaining channel (6, 8) is substantially situated in the central region of the storage channel (5).
6. Retaining system according to Claims 2 to 5, characterized in that, based on the cross-sectional area of the storage channel (5), a plurality of retaining channels (6, 8) are provided, preferably being arranged parallel to one another.
7. Retaining system according to Claim 2, characterized in that the retaining channel (6, 8) is positioned in the storage channel (5) via fastening elements (9, 10).
8. Retaining system according to Claim 2, characterized in that the retaining channel (6, 8) is formed by a wall region (11) which is provided with passages (7) and which, together with the inner wall (12) of the storage channel (5), forms a channel.
9. Retaining system according to Claim 2, characterized in that the wall region (11) is formed in such a way that, based on the cross section of the mixing channel (5), the respective retaining channel (6, 8) is widened in the central region and substantially tapers at its underside and/or its upper side.
10. Retaining system according to at least one of the preceding Claims 2-9, characterized in that the passages (7) are designed with a slot shape or as a perforation.
11. Retaining system according to Claim 2, characterized in that the retaining channel (6, 8) or the wall region (11) has a mesh-like structure.

Images