RU2195818C2 - Water aeration and fish concentration and catching apparatus - Google Patents

Abstract

FIELD: fishery, in particular, rearing, wintering and catching of fish in asphyxiation ponds. SUBSTANCE: auxiliary basin is constructed on bank of asphyxiation pond and is connected through water intake device with pond and through spillway to suction and delivery zones of pond water area. Auxiliary basin is equipped with aerator-flow former arranged at water intake device. Water intake device and spillway of auxiliary basin are arranged so that their suction and delivery zones adjoin to one another or intersect one another. EFFECT: increased efficiency of apparatus by reduced power consumption for water aeration and fish concentration. 4 dwg

Description

 The invention relates to lake fish farming. It can be used for growing, wintering and fishing in overland lakes.

 A device for aeration of water, concentration and fishing, including an auxiliary reservoir built on the shore of a castle lake, connected to a lake by a water intake and a spillway with suction and discharge zones in the lake, and an aerator-stream generator located on a water intake (A.S. 1731120, publ. 07.05.92, bull. 17) (1).

 The water intake in the known device is located on one side of the auxiliary reservoir, the spillway on the opposite. That is, the suction zone is located far from the discharge zone and does not have a noticeable effect on it. In this case, oxygenated water discharged by the spillway is directed deep into the lake, mixed with lake water having a low oxygen content, while losing most of the dissolved oxygen supply, and then returns to the flow aerator to receive another portion of oxygen. The large volume of water involved in the cycle (it takes several times less to keep the fish), mixing it with lake water, which has a low oxygen content, and large losses of oxygen dissolved in the water to oxidize bottom sediments, require the use of aerators and flux generators with high oxygen productivity , which means high energy costs.

 There is also known a system for growing, keeping and catching fish (adopted as a prototype), including an auxiliary reservoir connected to the lake by a water intake and a spillway, adjacent suction and discharge zones in the lake, and an aerator-stream generator located on the water intake (N. Slinkin Cultivation and fishing in shallow overseas lakes - "Fisheries and fisheries", 1996, 3-4, pp. 22-24) (2).

 The water intake and spillway in this device are closer to each other than in the aforementioned device, but they are also located at the opposite ends of the auxiliary reservoir. Therefore, the disadvantages noted above are also manifested in this device, but to a lesser extent.

 The technical result from the use of the invention is to increase the efficiency of the device by reducing energy costs for aeration of water and the concentration (catch) of fish.

 This is achieved by the fact that in the device for aeration of water, concentration and fishing, involving the use of an auxiliary reservoir connected to the lake with a water intake and a spillway with suction and discharge zones in the lake and an aerator-flow generator located on the water intake, the water intake and spillway of the auxiliary reservoir so that their suction and discharge zones are in contact or intersect.

In FIG. 1 schematically shows an auxiliary reservoir (reservoir - satellite), the suction zone and the discharge zone of which are in contact;
figure 2 is the same for intersecting zones;
in FIG. 3 - the same auxiliary water body (bypass channel), the suction and discharge zones of which are in contact;
figure 4 is the same when these zones intersect.

 A device for aeration of water, concentration and fishing includes an auxiliary reservoir (reservoir - satellite or bypass channel) 1, water intake 2, spillway 3, suction zone 4, discharge zone 5 and aerator-stream former 6. During long-term rearing of fish in the lake, when wintering carried out in the auxiliary reservoir, the water intake and spillway channels, in addition, are equipped with removable partitions - sandwich walls.

 The device operates as follows.

 When the aerator-flow former is turned on, the oxygen-rich stream created by it is released into two parts when leaving the spillway. One part of the volume of water is directed deep into the reservoir, mixed with lake water, which has a low oxygen content, gives it most of the dissolved oxygen and, having made a circuit, returns to the flow aerator, where it receives another portion of oxygen.

 The second part of the volume of water after leaving the spillway is separated from the main stream and sent to the flow aerator (into the suction zone) in a small circle of rotation, while maintaining a higher oxygen content, compared with the first part of the volume of water.

 As a result of dividing the flow into two parts, the distribution distance (range) of the main flow in the water area of the reservoir decreases, the unproductive losses of dissolved oxygen to the environment decrease, the oxygen content in the suction and discharge zones increases, the area of the oxygen-saturated water zone decreases, this ensures an increase in fish-attracting effect and density of fish in the aeration zone.

 When approaching killing, a defensive reflex takes effect in fish, which manifests itself in high sensitivity to oxygen. Its great mobility during this period allows us to accurately find places with the highest oxygen content, where it is delayed and concentrated. The practice of fish farming on lakes of the zamora type indicates that the fish grown in such lakes form dense fishing clusters even in small streams with oxygen-rich water, such as streams and living animals.

 The proposed device allows you to maintain the oxygen content in the zone of its operation at the required level when using low-power aerators, flow generators, save electricity and concentrated fish in the zone of the proposed device, catch a small backwater net at the auxiliary reservoir or, gradually reducing the coverage area of the aerator-stream to the size of the auxiliary reservoir, forcibly direct it into this reservoir, where it should be kept and caught with ordinary net fishing gear with a small coverage area.

Claims (1)

 A device for aeration of water, concentration and fishing, including an auxiliary body of water built on the shore of the overland lake, connected to the lake by a water intake and a spillway with suction and discharge zones in the lake, and an aerator-flow generator located on the water intake, characterized in that the water intake and spillway are located so that their suction and discharge zones are in contact or intersect.

Images