DE2657488C2 - Device for drawing off small amounts of water from a water reservoir - Google Patents

Description

The invention relates to a device for drawing off small amounts of water from a water reservoir with a variable water level, with a float and one of this in a vertical position Orientation supported overflow pipe, which is guided on a mounting pipe in the direction of lift, the upper pipe end of the overflow pipe opens below the water level. One such device is from DE-PS 6 53 512 known.

In this device, the overflow pipe is designed as a telescopic pipe made up of a plurality of pipe sections which are guided into one another. The float takes this in to ^r, rise / \: r float moving a This means after the other, "with that of the floating body with each zusätzli · ti received tube section also highlights a different weight, so that different Niveaueinslellungen result example.. When the water level rises, the longer the telescopic pipe is pulled out, the deeper the upper end of the overflow pipe dips into the water. that depending on the water level, different amounts of water are drawn off.

The invention is based on the object of providing a device for drawing off small amounts of water to create a water reservoir of the type described above, in which the floating body is independent is always loaded with constant weight from the changing water level and consequently constant Amounts of water can be withdrawn.

This object is achieved by the invention in a generic pulling device in that the overflow pipe is a double pipe with a double pipe jacket closed at its upper pipe end, and that the mounting pipe engages in the jacket gap to form a predetermined guide clearance for the overflow pipe. - These measures of the invention have the consequence that the float and the overflow pipe form a structural unit with constant weight. This prevents an undesirable change in the difference between the water level and the upper end of the overflow pipe, even if the water level changes, because the float with the overflow pipe always floats with the same immersion depth aiii the water level. The overflow pipe, designed as a double-jacket pipe, also fulfills a guiding function for the float, taking into account a predetermined guide clearance between the double-jacket pipe and the mounting pipe. This guide play leads to the fact that in the course of the swimmer's movement, a little surrounding water is always drawn through the double-jacket pipe and the pulling device remains functional as a whole.
The advantages achieved by the invention are in

ίο essential to see that a device is realized, the withdrawal of small and constant amounts of water from a water reservoir such as from storage tanks, basins, containers etc. with a variable water level is suitable. Because at the puller according to the invention ensures that the floating body is independent is burdened by the changing water level with an always constant weight.

In this way, devices such as rakes can be used in small sewage treatment plants There is no need for a broaching machine, a sand trap, or a specially constructed floating matter separator. This results in considerable economic advantages, both in terms of the investment costs to be raised also of personnel and energy costs. In fact, in small sewage treatment plants with inflows of up to approx. 20 l / s with the aid of the puller according to the invention the following functions can be combined in one structure:

a) Catching the screenings

b) Desanding

c) coarse desludging

d) Catching floating matter and light liquids

e) In the event of a build-up and constant drainage of liquid, there is a retention and buffer effect in the case of sewage surges. As a result, there is a hydraulic overload of the downstream Sewage treatment plant avoided. Mechanically treated wastewater can also be discharged without floating Components possible.

In the following, the invention is explained in more detail with reference to a drawing showing an exemplary embodiment explained; it shows

Fig. 1 shows a pulling device according to the invention in partial vertical section and

FIG. 2 shows the object according to FIG. 1 in a plan view.

The figures show a device for withdrawing small, constant amounts of water from a water reservoir 1 shown with variable water level 2. This device consists of one Floating body 3 with an overflow pipe 4 carried by this in a vertical orientation, which is attached to a Mounting tube 5 is guided in the direction of lift with a predetermined guide play. The upper end of the pipe 6 of the Overflow pipe 4 opens to a predetermined amount below the water level 2 and is therefore complete immersed in water. The floating body 3 is polygonal or round and has a water-accessible interior 7. The overflow pipe 4 on the float 3 is centered therein connected. The overflow pipe 4 is a double pipe with a closed pipe at its upper end 6 Double pipe jacket 14 formed. In the coat / space the mounting tube 5 engages. that on his

has lower pipe end connecting flanges 15 for connection to a fixed pipe 16. The floating body 3 is used as a diving wall to hold back floating elements contained in the water Fabrics.

1 sheet of drawings

Claims (1)

Claim: Device for withdrawing small amounts of water from a water reservoir with variable Water level, with a float and one of this in a vertical orientation borne overflow pipe, which is guided on a mounting pipe in the direction of lift, the upper pipe end of the overflow pipe opens below the water level, characterized in that that the overflow pipe (4) is a double pipe with a closed pipe at its upper end (6) Double pipe jacket (14) is, and that in the jacket gap, the mounting tube (5) below Formation of a predetermined guide game for the overflow pipe (4) engages.