CH708203A2 - Coanda water replaced with half-round profiles. - Google Patents

Abstract

The invention relates to a water socket (1) with a Coanda rake. The transverse computing bars (2) have a semicircular cross-sectional profile. Thus, these are easier to obtain than the used according to the prior art rake bars with triangular cross-sectional profile. Next results, based on the computational width, a higher total amount of water than with the Coanda rake according to the prior art.

Description

Subject / Technical area

The invention relates to a self-cleaning device for water intake from a flowing body of water. The system is based on the principle of "Coanda rake", which is new, however, that the profiles for the rake (water sifter) from semicircular steel resp. Half-waves is done. It concerns the area of ecologically compatible power supply, ie regenerative energy supply, as well as fishery and hydraulic engineering.

Presentation of the invention

State of the art

So far, Coanda rake with triangular profiles or trapezoidal profiles have been used as a water screen.

Disadvantages so far

Triangular profiles are relatively poor digestible in the steel traders. Triangular profiles tend to draw less water per surface than semi-circular profiles.

task

Coanda water intake with half-round profiles is a self-cleaning water removal device, which removes water without auxiliaries and operational supervision a watercourse.

Description (see the drawings)

Technical design

The Coanda water intake with half-round profiles is always based on the same principle, no matter what size. In the side profile it corresponds to the conventional "Coanda rake", indicative of this is the wing shape over which the water to flow to flow over it and can be written. It can be installed arbitrarily in flowing waters, whereby it requires a height difference in the form of a threshold in the watercourse.

Construction / function

The Coanda water intake (1) with half-round profiles (2) is constructed so that the water on the wing shape (la) can flow. Below the water intake is a basin (4) in which the water is taken and can then be reused and e.g. via pipes (5) can drain: diversion of a watercourse, supply line for a fish farm or water intake for a hydroelectric power plant to generate electricity. The semi-circular profiles (2) over which the water flows and finally falls between the cracks because of gravity, are transverse to the water flow direction and have a diameter of about 10 - 20 mm and a gap between 1 - 2 mm. The flow velocity of the water is partially accelerated over the individual semicircular profiles (2), thus creating a suction. The excess water flows over the wing shape (la) downwards away. The collected water is collected in the pool (4) and can then continue to be used. The half-round profiles (2) with the intermediate gap to each other serve as a sieve and Wasserfassendes basic element at the same time. They are arranged transversely to the water flow direction and can also have an offset angle (3) to the next profile, depending on which, so that a "rasp effect" is then produced. The rake or sieve as such should be made of steel. If it is to last a long time, made of stainless special hardened steel. The underlying pool (5) can also be concrete, does not matter as long as it can take over the function of water catching.

* (2) Numbers refer to the drawing

safety precautions

The Coanda water intake must be anchored with a foundation in the watercourse to prevent floating away. The device must have no sharp corners or edges to minimize the risk of injury to living things in the water.

solution

The object is solved by the features of claim 1

advantages

The advantage of the invention is that such water suspensions on the smallest possible area a watercourse can remove the water and it can be made relatively cheap. They are self-cleaning and can work independently without electronic and human help.

reservation

It is understood that in the future, another type of water intake can take over the function of a Coanda water intake with half-round profiles.

Claims (1)

1. Coanda water intake (1) with semicircular profiles (2): The water strainer or rake is transverse to the water flow direction and is made by means of semicircular profiles arranged at a distance of a small gap. The use of semi-circular profiles (2) in a Coanda water intake (1) or in a "Coanda rake" in and of itself is the claim.