DE2911780C2 - Rain relief for a mixed water sewer - Google Patents

Description

35

The invention relates to a rain relief for a mixed water sewer of the city drainage with a Overflow threshold above which a shut-off device that can be controlled via the water level in the inlet channel is stored, which is held in a closed position up to the damming target in the inlet channel, increasing with increasing inlet volume Releases part of the blocked cross-section and opens after the water level in the inlet channel has dropped the stowage destination can be returned to the closed position.

Such a rain relief with a fixed overflow threshold and with one from the water level in the Inlet float-controlled weir flap is known from AT-PS 3 47 869. The weir flap is up to start the overflow on the upper edge of the threshold and is activated when the water level continues to rise raised and then flows under. If the water level sinks below the starting level (reservoir target), the Weir flap on the solid threshold again and closes the passage. - With this facility will the relief is apparently only possible when the starting level is exceeded and already when it is undershot ended again, so that the overflow quantities with regard to the storage capacity of the inlet channels be largely restricted. However, a considerable structural effort is necessary for their realization; a subsequent installation in existing relief structures should not be possible with this construction or be very difficult to do.

The invention is therefore based on the object, with a rain relief in the manner of the AT-PS 3 47 869 known the structural effort while maintaining the extensive use of storage space in to reduce the inlet channels.

The solution to this problem is contained in the characterizing part of claim I.

This solution represents a practice-oriented, automatically controlled relief, the overflowing amounts of water limited to the minimum required, d. H. it comes before the admissible congestion destination in the canal to no overflow. Furthermore, the required structural effort is relatively low, so that subsequent Fittings in existing relief structures carried out without costly reconstruction work (e.g. concrete work) can be.

Advantageous refinements of the invention are the subject matter of the subclaims.

The invention is illustrated with reference to in the drawing preferred exemplary embodiments explained in more detail It shows

F i g. 1 a section through a rain relief according to the invention,

F i g. 2 shows an alternative embodiment, also in section

Between an inlet channel 1 and a relief channel 2, an Aäsperrorgan 3 is provided, which up to is closed to a permissible congestion destination 4 in the inlet channel 1

If the storage target 4 is reached, water quantities AQ run into a container 5. The weight of the water-filled container 5 causes the shut-off element 3 to be displaced, as a result of which a flow cross-section 6 is released between the inlet channel 1 and the relief channel 2.

As is apparent from the appended examples, various constructive embodiments are possible, wherein the container 5 and the obturator 3 as a single structural member being ^f -; can be carried. If the water level drops to the mark 7 when the rain subsides, the supply to the container 5 is interrupted. The container 5 is now emptied via a drain 8, the container 5 being brought back into its starting position with the aid of a weight 9 (FIG. 1), and the flow cross-section 6 closing again.

When executing according to Fig. 2 tilts the construction (Container 5 and shut-off device 3) after filling 5 against a support point 10, the flow cross-section 6 is released. After the container 5 has been emptied, the construction tilts due to the equilibrium conditions back to the initial state and thus closes the flow cross-section 6.

It must also be added that the container 5 during the described process to sequence 8 is constantly flowing through.

The water level in the discharge system or the receiving water is 11. So that the container 5 largely from Floating material is kept free, a diving wall 12 can be provided in front of it.

1 sheet of drawings

Claims (3)

Patent claims: 1.Rain relief for a mixed water sewer of the city drainage with an overflow sill, above which a shut-off device controllable via the water level in the inflow channel is stored, which is held in a closed position up to the storage target in the inflow channel, releases an increasing part of the blocked cross-section with increasing inflow volume and after sinking of the water level in the inlet channel can be returned to the storage target in the closed position, characterized in that a container (5) is attached as a weight to the shut-off element (3) through which mixed water overflowing from the inlet channel (1) can be knocked off when the discharge starts , and that the container iß) to increase its weight with increasing Zuiauimenge and thus for the progressive opening of the shut-off device (3) is provided with a constriction in the drain (8) that throttles the automatic drainage, and that to return the shut-off device (3) to the In the closed position a counterweight (9) is provided 2. Rain relief according to claim 1, characterized in that that a baffle (12) is arranged upstream of the shut-off element (3) in the direction of flow. 3. Rain relief according to claim 1 or 2, characterized in that the counterweight (9), which is ais segment weir with a horizontal axis of rotation formed shut-off device (3), which after exceeding the storage target (4) end bn throttled emptying of the container (5) over - and underflow