SU1024554A1 - Water intake structure - Google Patents

Description

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FI & L The invention relates to a hydronic and can be used to draw water from ponds of fishery importance. A water intake structure is known, including a U-shaped shield on the floats, a threshold in the form of a shield between the beginning of the water intake channel and the banks, set at the bottom and not reaching the surface of the water by 1/4 - 1/5 of the thickness of the water layer, with the upper edge of the shield on the surface of the water, and the bottom does not reach the bottom. 1/4 - 1/5 of the water layer in the reservoir t. ,: The disadvantages of this device are the absence of a fish drain, the lack of protection of the water intake channel from falling into the bottom fish and the possibility of its blockage with sediments. These drawbacks are due to the fact that, as a rule, young fish gather around the water intake at night (and also in winter) sink to the bottom. It is also known a water intake structure, which includes a horizontal shield installed in the feed channel, above which {a fish receiver is located, connected to a fish drain, and below it is a water inlet and pressure pipe with jet-forming cages 2. The disadvantage of this structure is to drive the mesh sheet located between the shield and the bottom of the canal. pumps, which reduces the consumption of water intake and requires, in addition to the jet cleaning of the web, its mechanical cleaning. The purpose of the invention is to increase work efficiency and simplify the design. The goal is achieved by the fact that the structure is equipped with a threshold made in the form of a dam, located in front of the shield / on the upper spit of which a pressure pipe with stream-forming nozzles is placed, and the pressure pipe is equipped with a protective visor. At the same time, the edge of the horizontal shield facing the threshold is inclined. FIG. 1 depicts the proposed water intake structure, type of drill. hu; in fig. 2 shows section A-A in FIG. in fig. 3 shows a section BB in FIG. 2. The structure contains an N-shaped structure consisting of vertical shields 1 and 2 and a horizontal shield 3. Vertical shields 1 and 2 can be made of wood or reinforced concrete, and if cheap stone is present, they can be made of stone dams . Horizontal shield 3 can be made floating or stationary, depending on the amplitude of water level fluctuations in the reservoir. The H-shaped structure is divided by a horizontal shield 3 into two parts: the lower one - the water intake 4 and the upper - the fish intake 5, which ends in a fish diverter. B. Threshold 7 is made in the form of a dam. The height of the threshold 7 and its removal from the inclined edge 8 of the horizontal shield 3. is selected such that there is no restriction on the suitable flow of water, i.e. The condition L M was fulfilled (Fig. 2), and the speed of the approach flow above the threshold 7 did not exceed 0.5 m / s. The pressure pipe 9 with jet-forming nozzles .10 pad is positioned on the upper slope 11 of the threshold 7. The jet-forming nozzles 10 are installed so that the hydraulic jets emerging from them are tangential to the upper slope 11 of the threshold 7 and act as a co-current flow, which facilitates the entry Fish and debris in the fish receiving part of the 5 H-shaped design. To avoid contact of the fish with the high-speed part of the hydraulic jets, the latter are covered with a protective visor on the initial part 12. Fish receiving part 5 o It wields guide walls 13, serving for dispensing and directing fish rybootvod b. The intake of water flows through the water intake part 4 into the intake channel 14. The structure operates as follows. The fish that enters the space between the vertical shields 1 and 2 passes over the protective visor 12 located on the upper slope 11 of the threshold 7, and, once in the turbulent zone formed by the hydraulic jets emanating from the jet-forming nozzles 10 of the discharge pipe 9, is demolished the fish receiving part 5 of the H-shaped structure and then to the fish drain 6, which is facilitated by the guiding walls 13. The presence of turbulence and high drift speeds in the zone of action of hydraulic jets excludes the possibility of fish and debris escaping a large part 4, which also contributes to a sloping edge 8 on a horizontal shield 2. Water consumption for the formation of hydraulic jets is set so as to ensure the flow of the flow entering the water receiving part 4 and further into the water intake channel 14. Using the proposed invention in comparison with known devices provides Increase E1024554 .4

the effect of protecting fish through fish protection nets, requiring clean-out removal from a vodka, ease of manufacture and reliable part of the device using in operation, as well as protection of water-hydraulic jets, the absence of a receiver from the pumps.

Claims (2)

1. WATER INTAKE - NII, including a horizontal shield installed in the under the supply channel, above which there is a fish receiver connected to the fish outlet, and below it there is a water receiver and a pressure pipe with stream forming nozzles, characterized in that, in order to increase work efficiency and simplify the design, it is equipped · A threshold made in the form of a dam located in front of the shield, on the uphill slope of which a pressure pipe with jet forming nozzles is placed, and the pressure pipe is equipped with a protective peak. 2. Construction on π. 1, otl and _β, characterized in that the edge sg of the horizontal shield facing the threshold is inclined. , <