EP1632619B1 - Water installation with a device for controlling overflow - Google Patents

Abstract

The device has a reservoir (2) with an overflow barrier (4) having an accumulation shield (10) that is movable by a dynamic pressure in the reservoir and a closure device (13). A rack grid (9) is provided in a variable overflow cross-sectional area and is arranged in such a manner that the shield overcoats the grid and wipes off dirt collected from the grid to the reservoir with a closing motion.

Description

The present invention relates to a water system according to the preamble of claim 1.

Such a device is from the EP 0 509 422 B1 known. The baffle plate is externally energy-free operable and, so to speak, self-controlling according to the water pressure or backwater level. The locking device comprises a counterweight, which is connected via a cable with the baffle plate and this tries to press against the water pressure in the storage space in the closed position. The baffle is arranged substantially upright and can be moved horizontally away from the overflow threshold and to this. The arrangement is made such that the baffle plate opens only when the backwater level has risen a predetermined distance far above the overflow threshold is, wherein the lower edge of the bulkhead below the said backwater level is. Due to the resulting opening cross section between the lower edge of the baffle plate and the overflow threshold, the water accumulated in the storage space can flow away.

Although with such Stauschilden whose lower edge is below the backwater level and is lifted from the overflow threshold, so that overflowing water does not flow through the bulkhead, but under the bulkhead through, to some extent, a retention of the driving on the water surface dirt can be achieved is It would be desirable to prevent the overflow of dirt in the overflow even better. For economic and technical reasons, sewage treatment or sewage treatment plants are generally designed for twice the dry weather, whereby the amounts of water exceeding the plant capacity are treated in rain overflow basins during rainfall. Due to the large, irregular amounts of rain or mixed water a significant proportion of mixed water with contaminants such as paper, plastic, etc. enters the water. This waste causes considerable damage in and around the waters, so that when controlling the overflow of such water systems, care must be taken to prevent such dirt from overflowing.

The present invention has for its object to provide an improved water system, which avoids the disadvantages of the prior art and the latter in an advantageous manner. In particular, should be achieved with simple means that require no external energy and ensure high reliability, improved pollution retention in the overflow of such water systems.

This object is achieved by a device according to claim 1. Preferred embodiments of the invention are subject of the dependent claims.

According to the invention, therefore, the device is characterized in that a self-cleaning grating is provided in the overflow cross section between the overflow threshold and the liftable edge thereof, the debris such as paper, plastics and the like withholds when the backwater runs over the overflow threshold. The rake grate is arranged such that the baffle plate with its liftable from the overflow threshold edge sweeps over the grate, so that the baffle plate during closing movements abstreift the collected during overflowing on the grating dirt to the storage space. As a result, the rake is cleaned every time when the baffle plate moves into its closed position, so that the rake for the next overflow process again ensures the predetermined flow.

In the event that the accumulated water level rises too much in the storage space due to excessive inflow and / or by approaching the grating during the overflow, a emergency relief staging can be provided in the invention, in particular connected in parallel to the staging screen assigned to the grating. The arrangement of the Stauschilde is advantageously designed so that with rising backwater level first opens the grating associated with the Stausbild or the emergency discharge bar only opens when the backwater level has reached a level above the backwater level at which open the grating associated with the stowage screen should. In particular, the emergency relief storage plate can be designed and arranged in such a way that it opens only when the backwater level has risen so high that it has already completely pushed the stowage image assigned to the rake grate. The two frame frames are thus matched to one another in such a way that when the grid is laid or blocked, the stealing screen associated with the bar remains open and the opening cross section of the grid is opened further up to the maximum opening. If the capacity of the grating is reached, the water level in the storage space continues to increase and opens on this level of water level, which may be increased, for example, about 10 cm, the emergency relief storage plate, so that the outflow tip is relieved.

In order to achieve a pre-cleaning and to keep at least a portion of the dirt from the overflow threshold and the Stauschilden, in the invention, a baffle the accumulator screen and / or the Notentlastungsstauschild be preceded. The baffle wall advantageously extends with its lower edge below the backwater table which opens the baffle plate, preferably below the overflow threshold. The upper edge of the baffle is preferably above the backwater level at which the water pressure opens the emergency discharge baffle. As a result, at least part of the dirt load driving on the water surface is kept away from the overflow space even when the emergency relief storage plate is open.

In order to facilitate the stripping of the grating by the baffle plate, can be formed in development of the invention, the grating bars of rods which extend in the direction of movement of the baffle plate. It is understood that the rake can also be otherwise designed as a sieve. However, a grid in the form of longitudinal bars facilitates self-cleaning and prevents jamming of the baffle.

This is particularly advantageous if the closing device is embodied such that it can be operated without external energy and only a limited closing force is available. In particular, the closing device may comprise a counterweight connected to the stowage screen, which by means of gravity tries to push the stowage plate into its closed position. The counterweight can be connected via a cable with the shield. The arrangement of the counterweight is advantageously adapted to the formation of the storage rack and / or the storage space and / or the overflow space such that the storage rack corresponding to the backwater level in the storage space and / or the water level in the overflow area automatically opens and closes. In this case, the counterweight can be designed as a float, so that it is lifted by the dammed up in the overflow water or the same is lowered with falling mirror. The height and mass of the counterweight and the size of its volume is adjusted according to the desired opening behavior of the size of the bulkhead image. The counterweight depends advantageously in the overflow area.

The movable mounting of the baffle plate can basically be designed differently. In principle, it would be possible to form the baffle plate as a flap and pivotally mount, so that the baffle plate can be lifted with its lower edge by a pivoting movement of the overflow threshold. The rake grate in this case can form a curved surface around the pivot axis.

In development of the invention, however, the baffle plate is linearly movable. The grating can form a surface parallel to the axis of movement of the baffle.

According to an advantageous embodiment of the invention, the rake forms a flat surface, while the baffle has a straight wiper edge, which touches on the flat grating rust. Optionally, scraper projections may be provided on the scraper edge of the baffle plate, which engage between the bars of the rake grate.

The baffle and the grating can take different inclinations to each other. For example, the baffle could be slightly angled with respect to the rake. In a further development of the invention, however, the baffle plate and the grating are arranged at right angles to each other. In particular, the grating can form a horizontal surface while the bulkhead is upright.

Advantageously, the screen grid is laterally bordered by two parallel side walls along which the baffle plate is displaceable, the baffle plate opposite the said side walls has only a slight gap, preferably is sealed. The side walls, together with the stowage plate and the grating, form a dirt stowage space from which the water can drain through the grate, but dirt is retained. In particular, prevent the side walls a lateral outflow of the overflowing water together with mittransportierter pollution load. The side walls are formed in a development of the invention as a dense surfaces. Optionally, however, the side walls can also be designed as a grating, especially when the stowage image extends only over a limited fraction of the width of the storage space, ie, there is still room left and right of the stowage.

To the storage space can connect to the grating an inclined ramp surface, which falls down to the storage space down to return streaked dirt in the storage space. The inclined ramp surface may still be formed by a part of the grating and / or be part of the corresponding storage space wall.

Fig. 1:

einen Schnitt durch den Stauraum einer Regenwasserbehandlungsanlage, der eine Draufsicht der Vorrichtung zur Steuerung des Überlaufs einschließlich deren dem Rechenrost zugeordneten Stauschilds und des parallel geschalteten Notentlastungsstauschilds zeigt,

Fig. 2:

einen Vertikalquerschnitt der Regenwasserbehandlungsanlage durch den Stauschild und den damit zusammenwirkenden Rechenrost an der Überlaufschwelle des Stauraums,

Fig. 3:

einen Vertikalquerschnitt der Vorrichtung ähnlich Fig. 2, der die Rechenanlage beim Einstau mit dem Stauschild in Schließstellung zeigt,

Fig. 4:

einen Vertikalquerschnitt der Vorrichtung ähnlich Fig. 2, der die Rechenanlage bei einsetzender Entlastung und ein Stück weit geöffnetem Stauschild zeigt,

Fig. 5:

einen Vertikalquerschnitt der Vorrichtung ähnlich Fig. 2, der die Rechenanlage bei maximaler Entlastung und maximal geöffnetem Stauschild zeigt, und

Fig. 6:

einen Vertikalquerschnitt der Vorrichtung ähnlich Fig. 2, der die Rechenanlage bei Entlastungsende und wieder geschlossenem Stauschild zeigt.

The invention will be explained in more detail below with reference to a preferred embodiment and associated drawings. In the drawings show:

Fig. 1:

a section through the storage space of a rainwater treatment plant, which shows a plan view of the device for controlling the overflow, including their associated with the grating bar image and the parallel-connected Notundungsungsstauschilds,

Fig. 2:

a vertical cross-section of the rainwater treatment plant through the bulkhead and the cooperating grating at the overflow threshold of the storage space,

3:

a vertical cross-section of the device similar Fig. 2 , which shows the computer system during the blocking with the baffle in the closed position,

4:

a vertical cross-section of the device similar Fig. 2 which shows the computer system when discharge is applied and a stowage piece is opened wide open,

Fig. 5:

a vertical cross-section of the device similar Fig. 2 showing the computer system at maximum discharge and maximum open stowage screen, and

Fig. 6:

a vertical cross-section of the device similar Fig. 2 showing the computer system at discharge end and again closed stowage screen.

As the Figures 1 and 2 show, the illustrated rainwater treatment plant comprises a generally built locally concrete, several rooms, room areas or chambers and inflows and outflow containing pelvic structure 1. This includes a cubic in the illustrated embodiment storage space 2 and an overflow space 3, between which an overflow threshold. 4 is provided. The storage space 2 comprises at its sole on one side an inlet 5 and on the opposite side of a drain 6. The overflow chamber 3 has a leading to the receiving water outlet 7 (see. FIG. 2 ).

Specifically, two overflow thresholds 4 and 8 are provided between the storage space 2 and the overflow space 3, which are arranged in the illustrated embodiment in a common plane and can be at the same height level. At the first overflow threshold 4, a substantially horizontally oriented, flat screen or screen grate 9 is arranged, which rests with its front end on the overflow threshold 4 and is present and extends horizontally into the overflow space 3 into it. In addition, a substantially vertically arranged baffle plate 10 is provided, which rests with its lower edge on the grating 9 or extends with only a small gap parallel to the grating 9. The baffle plate 10 is horizontally movable substantially perpendicular to the plane defined by the baffle plate, between a closed position, in which the lower edge of the baffle plate 10 is present at the overflow threshold 4, and one of the overflow threshold 4 lifted overflow position. As the FIGS. 3 to 5 clarify, this is the Stauschild 10 moved into the overflow chamber 3.

The baffle 10 is in this case guided displaceably by means of two linear guides 11, which can be formed or attached to the grating 9 laterally enclosing side walls 12. The side walls 12 extend parallel to one another and substantially perpendicular to both the grating 9 and the bulkhead 10 so that the bulkhead 10 can be moved back and forth along the sidewalls 12.

As FIG. 2 shows, the baffle plate 10 is connected to a locking device 13, which is formed in the illustrated embodiment of a counterweight 14 which is connected via a cable 15 with the baffle plate 10 and this in its closed position according to FIG. 2 tries to push or pull. The counterweight 14 is suspended in the storage space 2 and may be designed as a float, so that the counterweight is relieved in excessively water level in the overflow space 3.

As FIG. 1 shows, parallel to the bulkhead 10, a Notentlastungsstauschild 16 is connected, which is associated with the second overflow threshold 8. The emergency relief mounting plate 16 is basically designed and arranged in accordance with the storage frame 10. It is arranged substantially vertically and horizontally movable via corresponding linear guides 11, so that it can be opened from its closed position, in which its lower edge at the overflow threshold 8, by moving the Notentlastungsstauschildes 16 into the overflow space 3, so that between the lower edge of Notentlastungsstauschildes 16 and the overflow threshold 8 an overflow cross section is opened. The emergency relief mounting plate 16 is associated with a locking device 13 with a counterweight 14 arranged in the overflow space 3 and a cable pull 15, as is the case with the baffle 10.

The two storage signs 10 and 16 is connected upstream, as the Figures 1 and 2 show a baffle 17, which extends substantially over the entire length of the storage space 2 substantially parallel to the two storage signs 10 and 16. The lower edge of the baffle 17 extends slightly below the overflow sills 4 and 8, while the upper edge of the baffle 17 extends above the upper edges of the baffles 10 and 16.

As the Figures 1 and 2 show the top wall 18 of the relief structure 1 from the upper edges of the baffle 17 and the two Stauschilden 10 and 16 spaced. It may have a mounting opening 19 above the bulkhead screen 10.

It follows thus in rainy weather the following mode of operation of the discharge, in the FIGS. 3 to 6 In rainy weather, the water level in the relief structure initially rises above the overflow thresholds 4 and 8. The Stauschilde 10 and 16 are initially closed, so that the water level can continue to rise. If the backwater in the storage space 2 to the water level 20 (see. FIG. 3 ) increases, the backwater pressure against the baffle plate 10 reaches a size sufficient to push the baffle plate 10 against the closing force of the counterweight 14 a piece. This results in a discharge, as this FIG. 4 shows. The accumulated in the storage space 2 backwater can flow through the resulting opening cross-section between the overflow threshold 4 and the lower edge of the baffle plate 10, through the grating 9 through which sieves located in the water dirt 25 and prevents overflow into the overflow space 3.

As the FIGS. 3 and 4 show already reached the baffle 17 a certain pre-cleaning of the overflowing water. The baffle 17 retains most of the debris floating on the surface of the backwater and prevents it from ever getting to the relief in the area of the baffle. He is under the baffle 17 passing through the bulkhead 10 dirt is intercepted by the grating 9.

The counterweight 14 is adapted to the arrangement and size of the bulkhead 10 so that the bulkhead 10 further opens or closes again according to the water level and the resulting water pressure, whereby the opening cross section between the bulkhead 10 and overflow threshold 4 is increased or decreased ,

If the backwater in the storage space 2 continues to increase, the storage rack 10 is pushed into its maximum open position when the water level 21 is reached in the storage space 2 (cf. FIG. 5 ).

If the water level drops again in the storage space 2, the bulkhead 10 closes with the aid of the force exerted by the counterweight 24. If the water level drops below the water level 20 (cf. FIG. 6 ), the baffle plate 10 is pressed in its fully closed closed position. During this closing movement, the lower edge of the baffle plate 10 strokes the rake grate 9, thereby scraping the dirt load collected on the rake grate 9 back into the storage space 2. As FIG. 2 shows, the dirt 25 decreases over the ramp formed as an inclined ramp 26 from.

Would according to FIG. 5 the water level above the water level 21 drawn therein, in which the backwater pressure already completely pushes the bulkhead 10, continues to increase, the emergency relief shield 16 opens as soon as the water level 22 has reached about 10 cm above the water level 21. As a result, when the power limit of the grating grid 9 is reached, a further relief of the outflow tip can be achieved.

Claims (11)

1. A water installation, in particular a combined sewage and water treatment plant and/or a rainwater treatment plant, having an apparatus for controlling the overflow in the water plant and having a storage reservoir (2) with an overflow sill (4), wherein the apparatus has a baffle plate (10) associated with the overflow sill (4) which is movable between a closed position and an overflow position by the dynamic pressure in the storage reservoir (2) and an oppositely acting closing device (13) of the apparatus, wherein an overflow cross-section of different size is released between the overflow sill (4) and the baffle plate (10) in dependence on the position of the baffle plate (10), characterised in that a screen grill (9) is provided and arranged in the overflow cross-section such that the baffle plate (10) can sweep over the screen grill (9) and can scrape off scum collected in use on the screen grill (9) toward the storage reservoir (2) on a closing movement.
2. A water installation in accordance with the preceding claim, wherein the closing device (13) is formed as working free of external energy and in particular includes a counter-weight (14) connected to the baffle plate (10) via a cable pull (15).
3. A water installation in accordance with one of the preceding claims, wherein an emergency relief baffle plate (16) is connected in parallel with the baffle plate (10) associated with the screen grill (9).
4. A water installation in accordance with claim 3, wherein a scum board (17) is positioned in front of the baffle plate (10) and/or the emergency relief baffle plate (16).
5. A water installation in accordance with claim 4, wherein a lower edge of the scum board (17) is arranged beneath the backwater level (20) opening the baffle plate (10), preferably beneath the overflow sill (4), and an upper edge of the scum board (17) is arranged above the backwater level (22) opening the emergency relief baffle plate (16).
6. A water installation in accordance with one of the preceding claims, wherein the screen grill (9) is formed by bars extending in the direction of movement of the baffle plate (10).
7. A water installation in accordance with one of the preceding claims, wherein the baffle plate (10) is movable in a linear fashion and the screen grill (9) has straight bars.
8. A water installation in accordance with one of the preceding claims, wherein the baffle plate (10) has a straight scraping edge and the screen grill (9) is of planar design.
9. A water installation in accordance with one of the preceding claims, wherein the screen grill (9) forms a lying surface and the baffle plate (10) is arranged upright.
10. A water installation in accordance with one of the preceding claims, wherein the screen grill (9) is bounded by two parallel side walls (12) along which the baffle plate (10) is movable so that the screen grill (9), the baffle plate (10) and the side walls (12) border a scum storage reservoir.
11. A water installation in accordance with one of the preceding claims, wherein a ramp surface (26) inclined towards the storage space (2) adjoins the section of the screen grill (9) which can be swept over by the baffle plate (10).

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