SU33702A1 - Instrument for determining the average water flow velocity in water bodies - Google Patents

Description

The main patent describes a method for determining the flow rate of water in streams, which consists in lowering a reservoir filled with gas or developing a gas that is discharged with an appropriate device in the form of a bubble to the bottom of the stream, observing the time elapsing from the moment a bubble is released from the reservoir to phenomena on the surface of the stream; then, the distance from the place of occurrence of the gas bubble to the place of the tank lowering and the depth of the lowering of the latter are measured and, using the data obtained, the water consumption is calculated using the appropriate formula with the introduction of the required corrections.

In the proposed modified device for the formation of gas bubbles, a vessel is movable along the shank and is equipped with an inlet for water and an outlet for air.

 Depicted in the drawing in schematic form, the device consists of a rod /, measuring rod 2 and the vessel 6.

The rail 2, together with the vessel 6 attached to it on the holder 5, can be moved along the bar J by the necessary division; for this there is a clamp 4 and a guide tube inside the co (171)

ships 6, so that vessel 6 mocks n® shtanga /. Handle 3 is threaded and. passes through the rail 2, so that the rail can be fixed on a certain division. At the end of the rod 7 has a tip 2 and a disk 7; the latter restricts both sticking a pole into a viscous soil, and lowering the vessel. 6- The vessel 6 has two openings Р and / 6 with stoppers 2 and / 7 ;. besides, under tube JO there is a tube 75. Plugs 77 and 72 are provided; tubes J3 and J4. The upper end of the tube / 5 is set at the level of the lower division of the rail 2. The upper end of the tube 74 is set relative to the end of the tube 75 at any level, but always below the upper end of the tube 73.

From the boat on this vertical, the device is immersed with the end 8 into the bottom of the rivers up to the stop by the disk 7; vessel 6 also rests on disk 7, after which, by division: rails 2, mark the depth. At the same time, through pipes 7 and 75, water will begin to flow into vessel 6, and air will flow out of the latter through pipe 75. Passing through the depths at different flow rates, air bubbles will acquire these speeds and drift downstream, leaving a certain distance from rod 7 to surface.

zods; this distance is also measured. From the measured values (knowing in advance the rate of bubbling of the bubbles has blown) it is IMPORTANT to get the average flow rate. The faster the flow and the greater the depth, the further the bubbles will be blown away; the velocity of the bubble-up or, equivalently, the time it takes for the unit to go through the depth of a bubble can be considered constant. Since the time of the ascent is open, it is also for demolition by flow, then, knowing the depth, the time for the bubbles to travel from the rod / to the point of the ascent will be determined. By dividing the distance by time, the speed is determined. This speed will be the average speed of water flow on a given vertical. The direction of the jets is self-evident. Raise the vessel, you can blast from any depth.

The subject matter of the invention.

Claims (2)

1. A device for determining the average water flow velocity in reservoirs according to the method described in patent no. 15127, characterized by the use of gas rolling along a rod / vessel b provided with a water inlet opening 0 and an air outlet opening 9 for forming gas bubbles. 2. The form of the apparatus according to claim 1, characterized in that the vessel b is articulated with a measuring stick 2, which serves to indicate the depth of the vessel.