DE8700079U1 - Device for jet cleaning of a rain basin - Google Patents

Description

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Company Oskar Vollmer GmbH 7000 Stuttgart

Device for jet cleaning of a rain basin

The invention relates to a device for jet cleaning a rain basin according to the preamble of the claim

Stormwater basins are used for the temporary storage of wastewater, such as industrial and municipal wastewater, which also includes runoff rainwater, in order to prevent excessive flow of wastewater to sewage treatment plants or the like during rainfall events.

&igr; / It is known to arrange so-called jet cleaners in such rain basins. One or more jet cleaners are arranged in a rain basin. Each individual jet cleaner serves to temporarily or

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to continuously allow a strong jet consisting of sucked-in waste water or sucked-in waste water mixed with air to flow into the waste water in the stormwater basin at high speed by means of a stationary jet pipe, in order to thereby generate a circulating flow when the water level in the stormwater basin is sufficiently high, which is intended to reduce the settling of contaminants contained in the waste water in the basin on the bottom of the basin. However, as a rule, contaminants can still settle on the bottom of such stormwater basins to a disturbing extent, for example when columns are arranged in the stormwater basin to support a ceiling, which can be removed by this or these jet cleaners.

cannot be removed and so have to be removed manually from time to time, which is undesirable.

In the past, efforts were therefore made to make the effect of the jet cleaner particularly intensive. For this purpose, it is known (OE-OS 34 18 710) that a vortex tube is assigned to the jet pipe, in which the jet flowing out of the jet pipe, here consisting of waste water and air, is set in rotation in order to increase its penetration depth into the

Wastewater in the storm basin and thus its

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However, depending on the type of rain basin, relatively large amounts of contaminants can still settle on the bottom of the rain basin, which are not removed when the rain basin is emptied and have to be removed manually from time to time.

It is therefore an object of the invention to provide a device of the type mentioned in the preamble of the claim, which enables good cleaning of the rain basin even in difficult cases.

This object is achieved according to the invention by the device specified in claim 1.

In cases where the bottom of the pool cannot be cleaned sufficiently using immobile jet pipes, the device according to the invention makes it possible to achieve a significant reduction in the amount of contamination left on the bottom of the rainwater pool when it is emptied. It is even possible for the bottom of the rainwater pool to be practically free of contamination after emptying, so that with the device according to the invention it is generally no longer necessary to clean the bottom of the rainwater pool manually from time to time.

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The device according to the invention also makes it possible in many cases to reduce the volume flow of the waste water of the jet, which is usually between 30 and 100 l/s, so that weaker pumps can be used.

¹ ^ and/or where previously two or more jet cleaners had to be assigned to a rain basin for cleaning, the number of jet cleaners can be reduced to a single jet cleaner. This will save considerable

I^ Purchase and operating costs saved. It is

Furthermore, it is usually common practice to switch off the sweeper completely at predetermined intervals for predetermined periods of time (break times) when the floor is partially or fully filled in order to save operating costs, e.g.

to switch it on and off at intervals of a few minutes. In many cases, these break times can be extended by the invention, thus saving energy costs.

The jet cleaner sucks up the required

Wastewater from the storm water basin or from a canal, shaft or similar near the storm water basin.

Although it is possible to continuously or step by step adjust the position of the jet pipe at

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switched on jet, it is particularly expedient to provide that the position adjustment of the jet only takes place in a final phase of the emptying of the rainwater basin and/or after emptying has taken place, whereby preferably multiple or multiple back and forth movements of the jet pipe while pivoting and/or parallel displacement to itself or only a single back and forth movement of the jet pipe can be provided. Or in special cases only one position adjustment of the jet pipe in one direction of movement can be provided and the return of the jet pipe to the starting position can then be carried out after the pump has been switched off.

If the water level in the storm water basin is higher,

Adjusting the position of the jet in many cases disturbs or impairs the circulation flow it is intended to generate or does not bring about any significant improvement at higher water levels. It is therefore particularly useful to provide that the position of the jet pipe is only adjusted in the final phase of the respective emptying of the rain basin and/or when the rain basin is empty, or only when the rain basin is only slightly full.

QQ filling levels. This position adjustment can

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It is advisable to continue until the end of this final phase, i.e. until the rain basin has been emptied, or to stop during this final phase or after it has ended. It is particularly advisable to stop the position adjustment of the jet pipe following the jet cleaner pump being switched off.

The filling level of a rain basin is understood as the ratio Q /Q, where Q is the current content of the rain basin in wastewater and ^Q max is ^{the volume of water in front of} 9* ^Sl
is understood.

Q the intended maximum wastewater content max ^ö

Preferably, it can be provided that during the emptying of the rain basin, the adjustment of the position of at least one jet in question only begins when the rain basin is already largely empty, preferably when its filling level has dropped to a value that is a maximum of 0.1. This means that the adjustment of the position of the jet pipe only begins when the filling level of the basin during its emptying is equal to or less than 0.1.

To switch the position adjustment of the

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The motor that adjusts the position of the jet pipe can be switched on and off or a clutch can be engaged and disengaged if, for example, the pump motor of the jet cleaner is also used to adjust the position of the jet pipe or the pump motor always adjusts the position of the jet pipe at the same time when it is switched on. There are also other options for adjusting the position of the jet pipe.

Preferably, it can be provided that during the

When emptying the rain basin, the position of the jet in question is only adjusted by moving the jet pipe when the water level in the rain basin falls below a predetermined low level. It is particularly advantageous if, when emptying the rain basin, the position of the jet in question is only adjusted when the water level in the rain basin is in the area where the outlet of the jet pipe or a jet pipe directing a position-adjustable jet into the rain basin is above the inclined rain basin floor leading to a drain or, if the outlet of the jet pipe is above a

The water level is

The till

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above the edge of this depression over which the jet flows has dropped to a value which is less than 40 cm, preferably less than 25 cm, particularly ^preferably approximately 10 to 20 cm.

As mentioned, it can generally be expedient to provide that the position adjustment of the relevant jet pipe is terminated when the rain basin is completely or almost completely empty, preferably with shutdown or following the

Switching off the pump of the jet cleaner.

If the bottom of the rain basin usually runs at an angle to the horizontal, it can be particularly useful that the position adjustment of the jet and thus of the jet pipe is terminated when the bottom of the rain basin outside of any depression that may be present and serves as a drain is at least partially, preferably completely or almost completely above the level of the waste water that may still be in the rain basin. To adjust the position of the jet pipe in question, it can be particularly useful that the jet pipe from which this jet flows is swiveled back and forth in an approximately horizontal plane and/or moved parallel to itself.

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g It is particularly expedient to provide that the step-by-step or continuous position adjustment of the jet pipe during the emptying of the rain basin is automatically switched on at a predetermined first filling level of the rain basin and automatically switched off again at a second, smaller filling level. The second filling level can preferably be zero or almost zero.

Although in many cases it is practical to only adjust the position of the jet pipe in order to adjust the position of the jet in question and not to move the other parts of the jet cleaner, it is particularly advantageous from a structural point of view to firmly connect the jet pipe to the pump conveying the waste water and thus to adjust the position of the pump when the jet pipe is adjusted.

The drive for adjusting the position of the jet pipe can preferably be mounted on the jet cleaner

be arranged and form a part of it and 25

have any suitable design and arrangement, for example a hydraulic, pneumatic or electric actuator. The actuator can in turn be connected to a preferably

mechanical transmission, e.g. a lever and/or 30

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A crank mechanism, a gear mechanism or any other mechanism interacts with the jet pipe or a part supporting the jet pipe to adjust the position of the jet pipe.

The drawing shows embodiments of the invention.

Fig. 1 to 3 each show a schematic plan view of a rain basin in which jet cleaners are arranged, the jet pipes of which are arranged according to

Embodiments of the invention

are position adjustable,

Fig. 4 a section through the rain basin according to Fig. 1, seen along the section line

4-4,

Fig. 5 shows a partial section through the rain basin according to Fig. 4 in an enlarged view, seen along the

Section line 5-5.

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'" g Fig. 1 shows a plan view of a rain basin 10 which is rectangular in plan and

according to Fig. 4 has a corner 11, which is not shown in Fig. 1 for viewing the rain basin 10 and which is in its longitudinal center by

$ .Q 12 of the basin 10 is supported by columns 13 arranged.

Fig. 4 shows a longitudinal section through this basin 10, with the ceiling 11 marked _1F .

This rain basin 10 has a recess which forms a depression adjacent to its rear end wall 40 and extends over its clear width.

_ Drainage channel 14, which thus forms a drain from which the basin floor 12 runs slightly inclined upwards to the front end wall 41, into which it merges via a rounded section.

__ To clean this rain basin 10, a

single jet cleaner 16. This has a pump 17, whose vertical suction nozzle 15, which serves to suck in waste water, protrudes into the drainage channel 14. On the pressure side of the pump 17, a

» __ straight jet pipe 20, preferably horizontal or 30

1 5924-1 - 18 - /ti • 5 possibly weak inclined to the horizontal arranged, that the fluid sucked in by pump 17 Wastewater in strong jet into the pelvis 10 redirects , thus introducing it again.

The pump 17 with suction nozzle 15 and jet pipe

are firmly connected to one another and are pivotably mounted as a whole about a vertical axis of rotation 34, which here coincides with the vertical longitudinal center axis of the pump motor and the intake manifold 15.

For this purpose, the pump 17 is suspended at the top on a bearing 22 which supports and rotates it with a vertical axis of rotation and which is arranged on a support 23 fixed in the rear end wall. The pump housing is connected in a rotationally fixed manner through the bearing 22 to a vertical shaft 24 which is aligned with it and which is driven by an electrical, reversible drive which serves as a drive for pivoting the unit 15, 17, 20 and is fixed just below the ceiling on the rear wall 40.

Gear motor 27 of jet cleaner 16 to

Swiveling movements, such that the jet pipe 20 can be rotated from the normal position shown in Fig. 1 in full to the position shown in dotted lines by the

Swivel angle CC and back again to the vertical

suffered <t

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The rotation axis of the unit 15, 17, 20 can be pivoted. The gear motor 27 can be assigned, for example, two limit switches (not shown), which reverse its direction of rotation when the jet pipe 20 is pivoted to its respective limit position and then pivoted back to the other limit position. This pivoting can be slow, continuous or intermittent in smaller or larger steps. The jet cleaner 16 can form a complete unit, including the motor 27, which can also be subsequently installed in rainwater basins.

Instead of the electric gear motor 27, other drives for pivoting the jet pipe 20 can of course also be provided.

The position of the jet pipe shown in full in Fig. 1 is its normal position. It is located at a relatively short distance from the adjacent longitudinal side wall 42 of the rain basin 10 and extends approximately horizontally and approximately parallel to it, whereby the outlet opening 25 of the jet pipe 20 can be located at a relatively short distance of, for example, a few cm above the basin floor 12.

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When it rains, the rain basin 10 is partially or completely filled by the resulting heavy amount of waste water. In order to reduce the deposition of contaminants contained in the waste water on the basin bottom 12, the pump 17 is switched on and then runs continuously or in some cases intermittently until it is switched off again, which preferably only takes place when the rain basin is emptied again. The

The pump can preferably be switched on automatically

ei follow when the water level in the rain basin 10 has reached a predetermined height. The jet pipe 20 is in the fully extended position and as a result, the strong jet flowing out of it at high speed in the rain basin 10 creates a circulating flow 45 of the waste water stored in the rain basin, indicated by the arrow in Fig. 1, at least when its level is above the jet pipe 20, which reduces the settling of contaminants on the basin bottom 12. However, contaminants can still settle to a disturbing extent, particularly inside the circulating flow and in particular between the columns 13, which can cause the water to dry out after the return of dry weather.

35

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beginning emptying of the rain basin 10 then on

* the pelvic floor 12 remain. This

I Contaminants can build up over time I enlarge and rot and then have to be

} time can be removed manually.

: However, such deposits can be removed by the

, the waste water jet flowing out of the jet pipe 20 completely

% or essentially remove it by

1 according to the invention it is provided that the jet pipe

I is pivoted by means of the motor 27. This I preferably oscillating swivel movement is

ji, however, preferably not during the entire operation

I of the jet cleaner 16, but P particularly useful only at low water levels,

I preferably only in a final phase of emptying the

' ^: 20

J Rainwater basin 10 and/or after emptying the basin I 10, preferably after a rain event at I emptying the pool the water level in the

! Rain basin already down to a relatively low

I residual water level has dropped. This is shown in this

·■ Embodiment according to Fig. 4 is effected by

1 that in the rain basin two water level sensors 30, 31

&iacgr; The first water level sensor 30

,·■ indicates a drop in water level to a

( first water level 32 and the second 30

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Water level sensor 31 for dropping water level ·&iacgr;

to a lower second water level 33.

The first water level 32 in this embodiment is located close above the mouth 25 of the

IQ jet pipe 20, but can be lower or higher depending on the purpose. When the water level in the rain basin has dropped to this first water level 32, the first water level sensor 30 signals this to a control device 29, which switches on the gear motor 27 for continuous or intermittent, preferably slowly oscillating, pivoting of the jet pipe 20 by the pivoting angle oC. The rain basin 10 is further emptied and when the water level in the rain basin has dropped to the

2Q second water level 33 has dropped, the second water level sensor 31 reports this to the control device 29, which then expediently causes the motor 27 to be switched off when the jet pipe 20 returns to its

2p- in Fig. 1 shown in full line normal position has returned. This shutdown can therefore be appropriately equivalent to the shutdown as is usual in windscreen wipers of motor vehicles. Preferably, at the same time

&ldquor; ₀ the command to switch off the motor 27 the pump

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can be switched off using this command.

Instead of these two water level sensors 30, 31, a single pressure sensor or the like can also be used.
preferably be arranged in the Äbiaufrinne 14, IQ which is based on the first and second water levels 32, corresponding different water pressures
responds and the control device 29 the
corresponding signals.

The control system can be designed in such a way
be that the motor 27 is only switched on when, after previously exceeding the first water level 32, this first water level 32 is again undershot. Above the second

water level 32, the motor 27 is switched off and

the jet pipe 20 is set to the normal position shown in full. If, for example, during emptying of the rain basin after the first water level 32 has fallen below and the resulting

Switching on the motor 27 the water level in the basin

10 rises again due to a new rainfall event before the second water level 33 is reached, and the
exceeds the first water level again, then
the pivoting of the jet pipe 20 by the

2Q Exceeding the first water level 32 again

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switched off. Or it can also be provided that a sensor is provided which only switches on the motor 27 and keeps the motor 27 switched on as long as the water level in the rain basin is between the first and second water levels and, in addition, this water level is falling or remains constant, i.e. that when the water level rises, the motor 27 remains or is switched off. There are also other options for controlling the motor 27.

If the jet cleaner 16 works intermittently with predetermined pause times, i.e. is switched off at predetermined time intervals for predetermined lengths of time and thus no more jet is generated, it can be provided that the position adjustment of the jet pipe is also set over the lengths of the pause times and that it is continued again from the last existing position of the jet pipe at the end of the respective pause time. However, it can also be provided if necessary to continue the position adjustment of the jet pipe during the pause times mentioned or to allow the pause times to cease during the position adjustment of the jet pipe.

25

30

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other possibilities exist, &ogr;

';■. It is also often appropriate to provide that

., the motor 27 for continuous or intermittent

ciJ Switching voltage in the pipe is switched on. ro

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fe long the water level in the reservoir

% 10

l.f is between the first and second water level

and pump 17 is switched on. For the

Cleaning phase, in which the jet pipe is adjusted in position, it may be sufficient in simple cases to swing the jet pipe only once from the fully extended position to the dot-dash position and then immediately or later or, if necessary, only after switching off the pump 17 to swing it back to the fully extended position. The second

Water level sensor 31 can then be omitted or only

20

to switch off the pump 17. Usually it is

However, it is more advantageous to allow the jet pipe 20 to oscillate continuously or intermittently, preferably only slowly, in the relevant phase in which its drive is switched on.

In this embodiment, the second water level 33 is conveniently located approximately at the level of the upper edge of the drainage channel 14 on the right-hand side in Fig. 4, or it can also be higher or

35

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lower so that the jet pipe 20 can be

Reaching the second water level 33 by its
Virtually all of them swing on the pelvic floor 12
intensively stirs up accumulated impurities
and rinsed away, so that no manual cleaning is required
JO of the pelvic sole more from time to time |

or at most very rarely. f

&iacgr; The jet cleaner can be switched on in a known

manner.

i

In Fig. 2, an almost square rain basin 10

large volume shown in plan view, at _x

which so far two conventional jet cleaners have been close to -

the two longitudinal side walls 42, 43 of the basin 10 ^

2Q of the front rear wall 40 adjacent to the drainage channel 14 ?

of the rain basin 10 were required, which therefore |

had immobile jet pipes. \

These two conventional jet cleaners with

2g immobile jet pipes, which are approximately
horizontal and approximately parallel to the
Longitudinal side walls extended a little way,
generated two counter-circulating currents
in the rain basin, which could not prevent

-Q especially when columns 1

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are arranged in such a way that, particularly within these currents, considerable amounts of impurities could be deposited on the bottom of the basin, which had to be removed by hand from time to time. Thanks to the invention, this rain basin 10 now only requires a single jet cleaner 16, which is shown in full extension if the position of the jet pipe 20 is adjusted according to the invention. In the fully extended normal position of the jet pipe, at least when it is below the water level of the waste water in the basin 10, a circulation flow 45 of the waste water in the basin 10 is generated, shown in dash-dotted lines. However, according to the invention, the jet pipe 20 of this single jet cleaner 16 is now preferably pivoted continuously or intermittently one or more times, preferably in an oscillating manner, between the fully extended and the two-dot chain position, in a final phase of emptying the rain basin, whereby this pivot angle cC in this embodiment can be expediently about 35° to 90°, preferably 40° to 80°. One of the angular positions of the jet pipe 20 that can be achieved by pivoting corresponds, as in the embodiment according to Fig. 1, particularly expediently to a direction 46 that is directed towards the jet cleaner 16.

e ·

·

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g is directed towards the diagonally opposite corner 44 of the rain basin 10. For example, in this direction 46, by pivoting the jet pipe 20, two counter-circulating currents can temporarily form due to the jet flowing out of the jet pipe at high speed, which has a particularly good effect on cleaning the bottom of the basin 12.

In Fig. 3 a plan view of a rain basin 10 of large diameter is shown, whose one , _c circular drainage channel 14" is concentrically in the

The jet pipe JD of a jet cleaner 16 is arranged at the edge of the pool, close to the slightly sloping bottom of the pool. The jet pipe ₂₀ can be swivelled from the fully extended normal position, in which it generates the circulation flow 4b, to the dot-dash position, preferably by approximately 90°, again preferably only in the final phase of emptying the

Basin and/or after emptying the Zo

Basin 10. The limit position of the jet pipe 20 shown in dash-dotted lines is symmetrical to the fully extended line in relation to a vertical diameter plane of the rain basin 10 passing through the axis of rotation of the jet pipe 20.

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lilt J J &idigr; » » · ·

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I)I J &Idigr; »

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Limit position of the jet pipe However, depending on the circumstances, smaller or

even larger swivel movements of the jet pipe

'f be provided.

10

&Ggr; In some cases it may also be provided

especially if the rain basin 10 has no columns

that the jet pipe cannot be swivelled,

but parallel to itself, preferably in

15

approximately horizontally or both movements are carried out. For this

?! Purpose can be, for example, in the rain basin according to Fig. 1, the

yes jet pipe and the associated pump along one

* the back 40 of the rain basin 10 by means of a

20

Drive horizontally reciprocating

Sledge or carriage can be arranged, whereby the drive motor for this sledge or carriage can be arranged on it itself or on the rain basin 10. For example, it can be provided that the jet cleaner 16 can be moved between the fully extended and the dot-dash position.

In the embodiments, the device

odsr Device for jet cleaning of the rain basin

30

10 each have a single jet cleaner 16. They

35

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t ■ »·«&diams; ··

iJ I««

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However, depending on the size and shape of the pool, it can also have two or, in special cases, even more jet cleaners. The control 29 for adjusting the position of the jet pipe 20 can preferably be arranged, including the water level sensors or the like, on the frame or on other mechanical parts of the jet cleaner or can also be arranged completely or partially spatially away from the drive 27 and the parts carried by the carrier 23 and connected to the drive 27, for example, via electrical lines.

As mentioned, the position adjustment of the jet pipe 20 and thus the movement of the jet pipe 20 can be continuous or intermittent. Both

the continuous as well as the intermittent position-20

adjustment, relatively low movement speeds of the jet pipe outlet opening should be provided. With the intermittent and thus gradual position adjustment of the jet pipe 20

For example, it can be planned to have 10 to 30 Se-25

to move and then also stop for 10 to 20 seconds, etc. Or short periods of standstill can be inserted at the movement reversal points of the jet pipe, etc.

Claims (11)

5924-1 Protection claims 1. Device for jet cleaning a rain basin of a sewage system by means of at least one jet cleaner having a jet pipe which directs a jet of waste water or a waste water-air mixture into the basin at a high .j. speed, thereby reducing the settling of contaminants contained in the waste water in the stormwater basin on the bottom of the stormwater basin by directing the jet close to the bottom and/or at the bottom of the __ rain basin and can generate a circulating waste water flow in the rain basin if the water level in it is sufficiently high, characterized in that the jet pipe (20) of the jet cleaner (16) is arranged so as to be adjustable in position _2B and the jet cleaner has a drive (27) for continuous or intermittent position adjustment of the jet pipe (20). 2. Device according to claim 1, characterized in that the jet pipe is pivotable in the horizontal plane and/or parallel to _ characterized in that the jet pipe is preferably oU -Z- is position-adjustable itself. 3. Device according to claim 1 or 2, characterized characterized in that the jet pipe can be adjusted between two end positions. 4. Device according to one of the preceding claims, characterized in that the jet cleaner (16) has a pump (17) for sucking in waste water, which serves to feed the jet pipe with waste water. 15 5. Device according to claim 4, characterized characterized in that the jet pipe (20) and the pump (17) are firmly connected to one another. 6. Device according to one of the preceding 20 Claims, characterized in that the Jet cleaner has a pivoting unit which has the jet pipe and the pump firmly connected to it, which is connected to a motor of the drive (27) for adjusting the position of the 25 jet pipe is connected to the drive. 7. Device according to one of the preceding claims, characterized in that the Motor used to adjust the position of the jet pipe 30 (27) is connected to the jet nozzle or the unit via a gear, preferably a mechanical gear. 35 8. Device according to one of the preceding claims, characterized in that the jet pipe can be driven to a pivoting movement of at least 30°. 9. Device according to one of the preceding claims, characterized in that the jet pipe is adjustable in position in an approximately horizontal plane. 10. Device according to one of the preceding Claims, characterized in that it comprises a single jet cleaner (16). 11. Device according to one of the preceding claims, characterized in that the drive has a gear motor, which is preferably designed as a reversible gear motor.