SU952183A1 - Apparatus for aeration of water in fishing basins - Google Patents

Description

(54) DEVICE FOR AERATION OF WATER IN FISHING

WATER POTS

The invention relates to a fish farm technique, and more specifically to devices for aerating water in fish ponds, such as lakes and ponds. A device for aerating water in fish ponds is known, which contains a wing wheel, the upper part of which is enclosed in a casing, a compressor unit, and a pipeline for supplying compressed air to the casing 1. The device has a disadvantage in that it does not have a device that prevents it from freezing into ice on the surface of the reservoir during freezing. It is also known a device for aerating water in fish ponds, comprising two wing wheels, a casing, covering their upper part and a compressor with an air duct, while the casing is provided with an annular chamber of elastic material and an annular float fixed on it. In the known device, the annular chamber has a valve and is made of an anti-adhesive material, and the annular float is supplemented with thermal insulation material and is lined with rubber 2. However, the use of the float and annular chamber does not fully guarantee that the device does not freeze into ice, since the annular chamber is located under the float and does not protect the latter from the action of ice forming on the surface of the water in winter. In addition, the ice will freeze to the side surface of the float. The closest to the proposed by the technical essence is a device for aeration of water in fish ponds, including a float with electric heaters located inside it and an aerating device mounted on the float with pipes for supplying oxygen-enriched water. When this device is in operation, the electric heaters generate heat, heating the water and air around the device, which prevents it from freezing into ice 3. However, if the electric heaters are turned off, the device may be damaged by ice.

The aim of the invention is to prevent damage to the device by ice and thereby increasing operational reliability.

The goal is achieved by the fact that in a known device, including a float with electric heaters located inside it, an aerating device with pipes for supplying oxygen-enriched water mounted on the float, the float is made in the form of a spherical segment with the convex side down, and inside it there is a ring partition dividing the cavity of the float into two chambers, the outer of which is filled with liquid, while the electric heaters are placed in the outer chamber of the float.

FIG. 1 shows a device, a longitudinal section; in fig. 2 — node I in FIG. one; in fig. 3 shows section A-A in FIG. 2

A device for aeration of water in fish ponds contains a compressor 1, an air duct 2, a float 3 and an aerating device. Compressor 1 is mounted on the upper end of the duct 2, which passes through the center of the float 3 and is rigidly connected to it. The float 3 is made in the form of a spherical segment inside it there is an annular partition 4 placed concentrically to the duct 2 and dividing the float 3 into two annular chambers 5 and 6. The cavity 6 is filled with a liquid, such as mineral oil, and there are tubular electric heaters 7 mounted on the lid 8. The aerating device is located in the lower part of the duct 2 and includes tube racks 9 and 10, in which the tubes 11 are fixed with open ends. The tubes 11 are enclosed in a casing 12 which has fittings 13 and 14. Taps 15 and 16 are mounted on the fittings 13 and 14. At the lower ends of the tubes 11 there are side slots 17 for the passage of air. The air duct 2 is made telescopic.

The device works as follows.

Compressor 1 through the duct 2 injects air under the grill 10. Under the pressure of the incoming air under the grille 10, a layer of air 18 is formed, from which air through the slots 17 enters the tubes 11. The air entering the tubes 11 floats into them in the form of separate bubbles, under the effect of which in the tubes 11 occurs the movement of water, directed from the bottom up. Water enters the tubes 11 through their lower open ends, and exits through the upper ends. At the same time, water is in constant contact with air bubbles. During the movement of the air-water mixture in the tubes 11, there is a process of mass exchange, as a result of which part of the oxygen from the air bubbles passes into the water, i.e. the water is saturated with oxygen, which is necessary for respiration of fish living in the reservoir.

If the device is operated in wintertime in reservoirs on the surface of which ice is located, when compressor I is turned on, electric heaters 7 are simultaneously turned on, which heat the oil in the annular cavity to a certain temperature determined by the outside air temperature and the thickness of the ice. The heat emanating from the float 3 melts the ice adjacent to its surface and an annular zone of water free from ice is formed near the float. This zone is maintained for the entire duration of operation of the compressor 1.

After the compressor 1 is turned off, the current supply to the electric heaters 7 is automatically stopped, the oil cools and the water around the float freezes again. The resulting ice compresses the float, but due to its spherical shape, the float does not collapse, but is squeezed up.

The depth of immersion of the float 3 in water can be regulated within certain limits by filling the annular space of the aerating device with water. Valves 15 and 16 are used for this purpose. The annulus is filled or drained while the device is on the surface.

The immersion depth of the aerating device is changed by changing the length of the duct 2.

Making the float in the form of a part of a sphere and supplying it with electric heaters allows you to create a simple, reliable and durable device for aerating water in reservoirs that effectively saturates water with oxygen at any time of year, does not freeze in the ice of the reservoir during operation; subject to the destructive effect of ice. The spherical shape of the float protects it from being destroyed by ice and during the opening of reservoirs in the spring.

The proposed device, when used in industry, will give an economic effect in the order of 1.2 thousand rubles. in year.

Claims (1)

Invention Formula A device for aerating water in fish ponds, including a float with electric heaters located inside it and an aerating device with pipes for supplying oxygen-enriched water mounted on the float, in order to prevent damage to the device by ice and thereby increasing operational reliability.