SU856415A1 - Device for aeration of water in fishponds - Google Patents

Description

(54) DEVICE FOR WATER AERATION IN FISHING WATER DETAILS The invention relates to fish farming, in particular, to devices for aerating water in fish ponds. A device for aerating water in fish ponds is known, consisting of a pressure pipe for supplying water, a cylindrical mixing chamber connected to it, an air duct, a nozzle and blades, and a swirling flow of water p j. However, this device is characterized by a large loss of air stream velocity in the chamber mixing and ka consequence of this insufficient intensification of the process of dissolution of air oxygen in water. It is also known a device for aerating water in fish ponds, consisting of water-air mixing chambers coaxially mounted and communicating with each other and air bubbles crushing chamber, a nozzle disposed at the outlet of the latter, pressure pipe for water tangentially connected to the mixing chamber. an air duct for supplying air to the mixing chamber and blades installed in the crushing chamber and serving to further turbulize the flow. The device is based on using the effect of crushing air puffs under the action of intense low-frequency pulsations of speeds and pressures in the chamber of crushing air bubbles (2. However, this does not sufficiently crush air bubbles and, as a result, air dissolves in water not intensively. Radial blades also does not lead to a significant increase in the intensity of air dissolving. In addition, when the device operates, a hydrodynamic s flow, i.e. intense low-frequency pulsations in the pressure velocity n crushing chamber that pri385

iodine reduces the reliability of the device and the need to create the latter designed for significant dynamic loads, and consequently .M to increase its cost. .

The purpose of the invention is to intensify the process of dissolving air in water, as well as reducing the magnitude of the hydrodynamic instability of the flow and ensuring the reliability in operation,

To achieve the specified purpose, a device consisting of coaxially installed and communicating between each other chambers for mixing water with air and a chamber for crushing air bubbles, a nozzle located at the outlet of the latter, a discharge pipe for water tangentially connected to the mixing chamber, and an air pipeline for supplying air into the mixing chamber, provided with an air-intake chamber with an additional air duct, located between the mixing chamber and the grinding chamber of air puzzles and having Ku, and doyolnitelnym pressure pipe for water tangentially connected to the crushing chamber of air bubbles while in the wall separating the chamber crushing air bubbles and air intake chamber vtolneny openings.

In addition, an additional pressure pipeline is connected to the crushing chamber on the side opposite to the connection point of the main pressure pipeline, and a pipeline is installed in the crushing chamber of air bubbles, which serves to communicate it with the mixing chamber.

In Fig. - 1 shows the proposed device, a section along the longitudinal axis; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one; in fig. 4 shows a section B-B in FIG. I; in fig. 5 is a section of YYD in FIG. one; in fig. 6 shows the layout of two streams in the crushing chamber.

The device for aeration of water in fish ponds consists of the water-air mixing chamber 1 in series, the air intake chamber 2 and the chamber 3 for crushing air bubbles, and the nozzle 4 located at the outlet of chamber 3 for air: bubbles, two pressure pipelines for water supply : main pipeline 5 and additional

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pipeline 6, tangentially connected 1shx from opposite sides, respectively, to chamber 1 mixing water with air and chamber 3 crushing air bubbles, the main air duct 7 connected to chamber 1 mixing water with air, and an additional air duct 8 connected to air intake chamber 2.

A partition 9 is installed between the air intake chamber 2 and the chamber 3 for crushing air bubbles, having an opening 10.

In addition, a pipe 11 is mounted in the chamber 3 for crushing air bubbles, which serves to communicate it with the chamber 1 for mixing water with air.

The device works as follows.

Water from the pump is supplied through a tangentially located discharge pipe 5 to the water-mixing chamber 1, in which it is intensively curled to form a vacuum cavity in the center. Air from the atmosphere is sucked into the emerging vacuum cavity through the air duct 7. The swirling flow of water along with the air transported by it enters through pipe 11 into the chamber 3 of the crushing of air puffs, where it meets with a coaxially oppositely swirling flow formed in this chamber into which water is supplied pump through a tangentially located additional pressure pipe 6, and the air is drawn into the vacuum cavity formed by this flow from the atmosphere through an additional air pipe 8, into a noise-receiving chamber 2 and apertures 10. Due to the interaction of two oppositely twisted flows in chamber 3, the air bubbles are crushed, the flow is highly turbulent with the appearance of high-frequency velocity and pressure pulsations, which are not dangerous for the device, since small masses of water are involved in high-frequency pulsations therefore, the mass forces in this case are very small and are not capable of affecting the operation of the device. Due to the strong turbulization of the flow and the occurrence of high-frequency pulsations, air bubbles are crushed — and intensive.

their active dissolution in water. The nozzle 4 accelerates the movement of the jet of water-air mixture in a given direction.

The effectiveness of the proposed device for aerating water in fish pods is confirmed by the results of tests carried out on models of the proposed and known devices at a water flow rate of 50 l / s. Tests have shown that under the same conditions of WIEH, the concentration of dissolved oxygen in the proposed device is on average 1.1-1.3 times higher than in the known, and the amplitude of the pulsations decreases by an average of 5-6 times, and this ts the frequency of the pulsations in the known device is 10-30 Hz, and in the proposed one - 100-200 Hz.

Thus, the proposed device allows effective aeration of jo water in reservoirs, this increases the reliability of the aeration unit, increases its service life and reduces its cost by reducing the magnitude of the velocity and pressure pulsations in the crushing chamber.

Claims (3)

1. A device for aerating water 30 in fish ponds, consisting of coaxially installed and interconnected chambers for mixing water with air and a chamber for crushing air bubbles, a nozzle located at js outlet of the latter, a discharge pipe for water, tangentially connected15 " with an air mixing chamber, and an air duct for supplying air to the mixing chamber, characterized in that, I. the purpose of intensifying the process of dissolving air in water, as well as reducing the hydrodynamic instability of the flow and thereby ensuring reliability in operation, it is equipped with an air intake chamber with an additional air duct located between the mixing chamber and the crushing chamber of air bubbles and having a common wall with the latter, and an additional pressure pipe for water, tangentially flowing Inonii crushing chamber to the air bubbles, while in the wall separating the chamber crushing air bubbles and an air chamber, provided with openings. 2, the apparatus according to claim 1, wherein the additional pressure pipe is connected to the crushing chamber on the side opposite to the connection point of the main pressure pipe. 3. The device according to claim 1, which is in such a way that the air in the air crushing chamber her with camera mixing. Sources of information taken into consideration prn examination 1. Authors certificate of the USSR 506357, cl. A 01 K 63/00, 1973. 2. USSR author's certificate number 599777, cl. A 01 K 63/00, 1978.