DE3300489A1 - Float-controlled screen - Google Patents

Abstract

The invention relates to a float-controlled screen, in particular for storm-water retention basins in sewerage systems which are equipped with throttle devices which cannot regenerate automatically in the event of clogging. If the outlet opening of the throttle device known from German Offenlegungsschrift 3007035 clogs, said throttle device can no longer regenerate automatically since the basin can no longer be emptied. This is because the float of the throttle device in the water-filled basin is held in an upper position and the shut-off outlet opening no longer opens. The object of the invention is to provide an apparatus which retains such substances, found in sewage, which lead to the outlet opening clogging at the throttle device clogging up and which can impair the operation of the mechanically moving parts. At the same time, this apparatus together with the throttle device, is intended automatically to remove substances which are in danger of clogging, as a result of which maintenance is reduced. The side view of an exemplary embodiment is shown in the figure. The Figure shows how, in the uppermost position of the float 5, the screen 1 is pressed against the flow opening 6 with the aid of the actuating rod 4 via the lever arm 3, in order to retain contents of the sewage which cause blockage. In the case of dry-weather flow, when the basin is not filled with water, the float 5 assumes its bottom position, the screen 1 thus releasing the flow opening 6... Original abstract incomplete. <IMAGE>

Description

: jX.j: ': . \] -j 3300A89

Dipl.-mg (FH) - Lindenstr. 26th

Klaus-Ulrich Giehl ^ * ⁵²³⁹ Heimborn

-PATENT APPLICATION-

Float-controlled rake

The invention relates to a float-controlled rake, in particular for rain retention basins in Sewer networks that are equipped with throttling devices that do not operate automatically in the event of a blockage can regenerate.

Rain retention basins in sewer networks with the requirement for a constant flow rate are equipped with throttle devices equipped, as they are known for example from DE-OS 30 07. Characteristic of this type of throttle device is that with the help of a float control, the outlet opening is reduced as the water level rises will. This increases the risk of clogging due to the ingredients in the wastewater.

Clogs the outlet opening of the above-mentioned throttle device. it can no longer regenerate itself because the pool can no longer be emptied because the swimmer the throttle device is held up in the stowed pool and the dimmed outlet opening no longer opens.

According to DE-OS 31 10 104 is known, the throttle device by arranging an upstream diaphragm against clogging to protect; However, it does not offer any protection for larger pieces of fabric, as these extend into the immediate outlet opening squeeze in and clog.

An automatic regeneration of the blockage is not possible here; DE-OS 31 10 104 also offers no protection against any objects carried in the sewage around the mechanical parts of the throttle device wrap or wedge them and thus render them inoperable.

The invention is based on the object of creating a device which can contain such substances in the wastewater holds back, which lead to a blockage of the outlet opening at the throttle device and the function the mechanically moving parts. At the same time, through this device should be connected substances at risk of clogging are automatically removed with the throttle device, which reduces maintenance.

An exemplary embodiment of the invention is shown in the drawing and is described in more detail below. Show it

The front view of the device according to the invention. The side view of the device according to the invention Installation example in a retention basin in plan view.

The installation example according to FIG. 3 in longitudinal section.

The side view of a further embodiment of the device according to the invention.

As shown in Fig. 3 and Fig. 4, rainwater retention basins 10 which are equipped with throttle devices 12, usually built with a so-called throttle shaft 11, in which the throttle device 12 is installed.

Fig. 1 Fig. 2 Fig. 3 Fig. 4th Fig. 5

-ζ- 6.

In the case of normal dry weather runoff, the rain retention basins 10 and the throttle shaft 11 not stowed. The wastewater with its ingredients flows unhindered through the basin 10 to the sewage treatment plant. In this state, the rake 1 gives the flow opening 6 according to the dashed line in FIG between retention basin 10 and throttle shaft 11 free by the weight of the float 5 and the The actuating rod 4 is brought into a horizontal position via the lever arm 3 of the rake 1 and thus none Represents obstruction for the dry weather runoff (dashed line of Fig. 2).

If a rain event sets in, the basin 10 and the throttle shaft 11 are dammed. The impoundment in the throttle shaft 11 causes the float 13 of the throttle device 12 to rise, the outlet opening 14 is continuously reduced.

At the same time, the float 5 of the rake also receives buoyancy and presses the rake 1 against the flow opening 6.

The bar spacing of the rake 1 is chosen so that it is smaller than the smallest gap width of the outlet opening 14 of the following throttle device 12. As a result, all waste water contents are removed from the rake 1 which could lead to clogging of the throttle device.

If so many substances are caught by the rake 1 that it clogs, not enough water will flow out the basin 10 in the throttle shaft 11 whereby the water level in the throttle shaft 11 drops. This happens as a result of the small volume of the throttle shaft 11 relatively quickly.

When the sinking water level the float level of the rake has fallen below 1, the rake 1 goes back to the horizontal position and opens the flow opening 6 free again.

Due to the strong water pressure as a result of the dammed basin 10, the rake bars are removed from the wastewater contents flushed free in the direction of flow, which is also unhindered in a matter of seconds through the outlet opening the throttle device 12 get to the sewage treatment plant because of the currently low water level in the throttle shaft the outlet opening 14 on the throttle device 12 is wide open.

Immediately thereafter, the water level in the throttle shaft rises again, the rake 1 rotates in front of the flow opening and again protects the throttle device 12 against clogging.

Thus, a blockage in the rake 1, which would have occurred without it in the throttle device 12, is automatic eliminated.

In a further embodiment of the invention, the rake 1 with the opening piece 6 ', whose shape is arbitrary can be designed, mounted on a base plate 7.

ORIGINAL

copy)

Claims (5)

• · »♦ Claims ^r '\
lj float-controlled rake, especially for rain retention basins in sewer networks that are equipped with throttling devices that cannot regenerate automatically in the event of a blockage, characterized in that a rake (1) is pivotably mounted behind a flow opening (6) on its axis of rotation (2) a lever arm with a positive motion (3) is firmly connected, which is articulated to an actuating rod (4) which carries a float (5) at its upper end, the rake (1) in the lowest float position an approximately horizontal position in the flow direction above the flow opening (6 ) and rests against the flow opening (6) at the highest float position. 2. Float-controlled rake according to claim 1, characterized in that the lever arm (3,3 ') with the actuating rod (4,4') and the bearing parts (8,8 ') is arranged in pairs. 3. Float-controlled rake according to claims Iu. characterized in that in a further embodiment the float (5) can be connected directly to the lever arm (3). 4. float-controlled rake according to claims 1 to, characterized in that the device is mounted on a base plate (7). copy] I. 5. Schwinuner-controlled rake according to claims 1 to 4, characterized / that the flow opening (6) can be designed in any shape. BATH ORIGINAL