SU975879A1 - Fish lift - Google Patents

Description

The invention relates to hydraulic engineering, in particular to fish lifts used as fish passages through various height obstacles on water highways. ^one

A fish elevator is known, which contains chambers that have common gates and communicate with each other and with both pools, and in one of the chambers a horizontal grid is installed with the possibility of moving in the vertical direction by means of a float with four blocks through which the cables that are connected at one end to the grid are passed and others to the bottom of the chamber, in which there is a slot for the passage of fish. The gap is covered with a lid connected by a cable passing through the block with a reservoir-tank * ^! ].

* The disadvantage of this fish elevator is its low efficiency due to the high consumption of water when transporting fish.

A fish elevator is also known, including a vertical shaft, elastic panels fixed in the shaft along its entire height, forming a cavity with the walls of the shaft, means for closing the panels and a frame, which are installed25

ten

15

20

thirty

2

vertically displaceable £ 2 ^. ,

A disadvantage of the known device is its complexity due to the presence of working chambers with counterbalance floats and a troso-block system.

The purpose of the invention is to simplify the design.

The goal is achieved by the fact that in the fish elevator the frame has the shape of a shaft and is placed between the panels, and the means for closing the panels is made in the form of air ducts placed in the lower part of each cavity, connected to a source of compressed air.

FIG. 1 shows a fish elevator, vertical, sectional view during fish accumulation; in fig. 2 - the same, in the period of increase in the volume of water with fish; in fig. 3 - the same, in the period of release of fish in the upstream; in FIG. 4, section A-A in FIG. 2

The fish elevator contains an inlet chamber 1 with a feeding hole 2, a shaft 3, detachable; from the upper side of the bolt 4, closed elastic panels 5, hermetically attached by their extreme upper and lower parts to the walls of the shaft 3 along its perimet3

975879

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pv and along the middle lines of two opposite sides along the height of the closing of the panels 5, air ducts 6 installed inside the air cavity, i.e. between the elastic panel 5 and the walls of the shaft 3, the movable frame 7, installed-5, is installed in the strut to the walls of the mine 3. <Attachments of 8 panels 5 to the walls of the mine along their middle lines are made with the possibility of tight hermetic closure of the adjacent \ 10 panels 5 exposure to air.

Works fish lifter as follows.

The accumulation of fish in the entrance chamber 1 is ensured by creating 15 attracting speeds by feeding the hole 2 and the noise of water falling from the upper pool due to the partial opening of the shutter 4, which helps to attract fish to the mine 3, 20

where the water is at the level of the lower reach above the boundary of the initial * & capacity formation between the panels 5. At this time, the air from the air cavity is completely released, the elastic panels 5 are pressed to the walls of the shaft 3, the movable frame 7 is in the lowest position and rests on duct b, thus opening the entrance to the shaft 3.

• After the end of the accumulation cycle ⁵ , and attracting fish, air is injected into the cavity between the elastic panels 5 and the walls of the shaft 3 through the air ducts; and prevents air from escaping into the upper part of the cavities (above the frame 7) and under the influence of the compressed air overhead from below, through the elastic panels 5, the frame 3 rises along with the volume of water. Next is

the volume of water is transported in the vertical direction by the continuous pressure of the injected air into the air cavity. The increase in the volume of water with fish continues to the extreme upper position of the movable frame 7 and the air is completely filled with air. Then, by raising the bolt 4, the levels in the mine 3 are equalized with the upper pool and the fish goes out independently against the water flow.

 The use of the proposed fish elevator allows you to simplify the design, to carry out the delivery of fish from the pool to the pool. water courses and in favorable conditions with the exception of injuring them.

Claims (1)

Claim A fish elevator comprising a vertical shaft, elastic panels fixed in the shaft throughout its height, forming a cavity with the walls of the mandrel, means for closing the panels and a frame mounted for vertical movement, characterized in that, in order to simplify the design, the frame has the shape of a shaft and . placed between the panels, and the means for closing the panels, made in the form of placed, β the lower part of each of the cavities of the air ducts connected to the source of compressed air.