SU1731897A1 - Fish barrier - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to hydraulic engineering, in particular, to devices that protect fish from getting into water intake structures. The purpose of the invention is to increase the work efficiency by increasing the intensity of diverting fish from the intake zone. The fish protection device includes a water intake channel 1 connected to a waterway 2, a screen-reflector 3, a perforated duct 4, a fish drainage stream 5, a floating section 6, installed at an angle of 65-75 & to the axial line of channel 1, the upper edge 8 of tray 5 is made with a slope equal to i, where Bk is the width of channel 1. In addition, the device is equipped with a trigger element 9 consisting of a rectangular tray 10 and an ejector. The Donna fish passes freely under the catch 6 and is in the zone of action of the water-air curtain. Here, it rises to the upper layers and enters the fish collecting tray 5. It is then carried away through the rectangular tray 10 to the water source. 3 il. cl

Description

FIELD OF THE INVENTION The invention relates to hydraulic engineering, in particular, to devices that protect fish from getting into water intake structures.

The purpose of the invention is to increase work efficiency by increasing the intensity of diverting fish from the water intake zone.

FIG. 1 shows a fish protection device, a plan; in fig. 2 is the same, section A-A in FIG. one; in fig. 3 is the same, section BB in FIG. one.

The fish protection device includes a water intake channel 1 connected to a waterway 2, a screen-reflector 3 located across the water intake channel 1, a perforated duct 4 laid at the bottom of the channel 1 in front of the screen reflector 3, a fish drain tray 5, floating bottom -6,

located in the inlet section of the water intake channel 1 and set at an angle of 65 ... 75 ° to the axial line 7 of channel 1, while the fish drainage tray 5 is attached to the valve 6 from the downstream, and its upper edge 8 is inclined I, moreover, the edges 8 of the fish-collecting tray 5 increase in the direction of flow in it, and the slope i of the edge 8 is chosen from the ratio

i

cos in VK

X |

0

00

about

x |

where Bk - the width of the intake channel 1.

In addition, the fish protection device is provided with a trigger element 9. consisting of a rectangular tray 10 and

an ejector 11 located therein, wherein the motive element 9 adjoins the fish-collecting tray 1 at its exit, and the bottom of both trays 1 and 10 is located at the same mark, besides, the width of the rectangular tray 10 is 1.75. ..2.00 width of fish tray 1.

The screen-reflector 3 and the floating edge b are held afloat by the pontoons 12.

Fish protection device operates as follows.

Float 6 provides predominantly bottom feeding of the water intake and delays surface fish in the water course 2. Donna fish freely pass under the seal 6 and find themselves in the zone of action of the water-air curtain formed by the compressed air coming out of the perforated duct 4. Here, the fish rises in an upward flow into the upper layers of water (the spreading zone of the air-air curtain) and is transferred to the side of the fish drainage tray 5. The reflector screen 3 provides unidirectional spreading of the airborne flow — only in the direction of the fish drainage tray 5. On the way to the fish diversion tray 5, the water intake flow, loses some of the energy, and the depth of the return flow plume decreases. Therefore, where the distance from the perforated duct 4 to the fish drain tray 5 is less, the speed of approach to the fish drain tray 5 and, consequently, the kinetic energy of the flow is greater. Due to the difference in approach speeds, at the beginning and end of the fish drain tray 5, a transit flow is formed along the bank. At the same time, there is a circulation movement of water, which contributes to the extension of the disoriented passive movement of fish. To keep the circulation flow with the fish in the fish drainage tray 5, and also take into account that the depth of the fish-bearing layer sent to the fish drainage tray 5 is different along the length of the front of the fish diverter, the upper edge 8 of its front wall is made with a slope of cos in / Bk against the direction of flow in the fish tank 5.

At the outlet of the fish-collecting tray 5 at the interface of the fish-diverter with the shore

The water intake channel 1, when the fish is flowing into the pond, has an incentive element 9 consisting of an ejector 11 and a rectangular tray 10, 1.75 ... 2.00 wide, of the fish diversion tray 5, and the water depth in it is equal to the depth in the fish drain. This allows the fish to be withdrawn not only from the fish drain tray 5, but also creates conditions for the transit transport of young fish from the upstream side of the floating bath 6, which eliminates the accumulation of fish before the water intake.

Claims (1)

1. A fish protection device that includes a water intake channel connected to a water course, a screen-reflector located across the water intake channel, a perforated air duct laid at the bottom of the channel in front of the screen-reflector, and a fish trap, characterized in that increase the intensity of removal of fish from the water intake zone, it is equipped with a floating circuit located in the inlet section of the water intake channel and installed at an angle of 65-75 ° to the channel axis, while the fish drainage tray is attached flax to the bottomline from the downstream, and the upper edge of its side is made with a slope . Cos0  -It where Bk is the width of the water intake channel, and the marks of the upper edge of the fish-fish tray increase in the direction of flow in it. 2, The apparatus according to claim 1. characterized in that it is provided with an incentive element consisting of a rectangular tray and an ejector disposed therein, the incentive element being associated with the fish diversion tray at its exit, and the bottom of both trays at one mark, besides, the width of the rectangular tray is 1.75-2.0 of the width of the fish diverter tray. No B / Ib.  J consumers) ± l N dozduh 4 Fig.Z