SU67871A1 - Long filling batometer - Google Patents

Description

The types of bathometers known in the art, i.e., devices for sampling water at a depth, determining its turbidity and measuring the flow velocity work with errors due to the fact that when they are quickly submerged to a great depth a significant pressure difference is created in the instrument and in the surrounding; her his surroundings. Partial filling of the bathometer with water occurs due to compaction of the filling it through both the opening intended for this purpose and through the second opening, which normally serves to remove the air filling the device. The water that enters through both openings violates the dependence of the quality of the sample on the measured flow rate and the amount of sediment that has entered it (turbidity of water).

The peculiarity of the proposed bathometer is that its reservoir is divided by a partition into two parts, one of which (frontal) is designed to receive water under the action of a velocity head, the second (rear) serves to balance the air pressure in the first part of the device when it is immersed. For this purpose, the rear part of the bathometer is equipped with openings for water discharge and is connected to the frontal part by a tube equipped with a tap.

FIG. 1 and 2 depict the proposed batometer (side view and in section).

The tank of the bathometer has a significantly larger capacity than the sample volume, and is divided into two parts by the hermetic septum 2. One of them, the front part 3, is designed to receive water entering the device under the action of the velocity head, and the second, rear chamber 4, to balance the pressure in the first part of the device at the time of immersion with the pressure of its surrounding water at the height of the receiving tube 5. These Parts of the device are connected by a tube 6 with a valve 7, which separates both compartments and allows to stop the movement of air from one part of the device to the right moment.

The rear chamber 4 of the device in its lower wall is equipped with four circular openings with a diameter of about 8 mm, which ensure sufficiently fast filling of the chamber 4 with water under the action of hydrostatic pressure at the observation point. The tube 5, which serves to fill the device with water, is equipped with a shut-off valve 8.

Before immersing the device in water, the valve 8 must be closed and the valve 7 is open. As the device dives to the required depth, the chamber 4 is filled with water, corresponding to the air sealing in the device. Thus, automatically equals 311

L 67871-

The pressure in the device is hung up with the pressure of water at its location. Having immersed the device to a predetermined depth, after some time required to balance the pressure in both parts of the device with the surrounding water pressure, with the help of cords 9 and 10 brought to the surface, open valve 8 for water inlet and at the same time close valve 7 connecting both parts of the device.

The air pressure in the device is equal to the pressure of the surrounding water, so if the latter is stationary, then it will not flow into the device. In the moving water at the inlet of the tube 5 / directed upstream, under the action of high-speed n-pressure, the pressure will increase, and water will begin to flow through the tube into the device, creating in the compartment / some excess pressure, which in turn will be forced out of the device air.

Beginning from the moment of operation of the device, water enters it in proportion to the flow velocity. This makes it possible to use an instrument to measure the rate of flow of water in streams.

Subject invention

A long-time bathometer used to determine the turbidity of the water and the flow rate, characterized in that the bathometer’s tank is divided by a partition into two parts, one of which, namely the frontal part, is designed to receive water under the action of the velocity head, the second one, to equalize air pressure in the first part of the device when it is immersed with water pressure, for which purpose the rear part is provided with water inlet openings and is connected to the frontal part by a tube with a tap.