SU1706498A1 - Fish intake arrangement - Google Patents

Description

FIG. 2

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This invention relates to commercial fishing, which can be USED for fish & using fish pumps,

In the case of a fish catching device, including a fish net, lowering the board;; the swim vessel into the living layer of the ship with lifting mechanism, and nets for lifting fish aboard the ship l

A disadvantage of the known device is the high labor intensity and performance of the implementation with its help.

Closest to the offer is a fish fishing device, which includes a fishing vessel on which a fish pump is installed, pumping fish-containing flow to the deck through a cylindrical suction pipe, where the separation of fish U by filtering nets takes place with filter nets.

A disadvantage of the known device is its low fish productivity due to the fact that the zone of critical speeds near the fish opening of the suction pipe is small, since it is formed only by the flow velocities radial to the suction pipe. The use of a cylindrical tube as the fish-intake part also leads to local compression of the fish-bearing porza after passing through the inlet orifice - fish-choking section, which increases the resistance to the incoming flow and reduces the volumetric efficiency of the fish. The purpose of the invention is to increase the productivity of fishing by increasing the zone of influence of the suction pipe of the tube.

The goal is achieved by creating a screw flow in front of the inlet cross section of the suction pipe, for which, in the side walls of the suction pipe, at a distance of no more than three diameters with an optimum of 0.5 diameter from the fishing cross section, holes are made that are not tangentially unequal it is directed in cross-section by attaching s / nozzles in such a way that the flow coming through them twists the main fish-bearing stream in the discharge tube and in front of the fish collection tip, thanks to

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p what uvlevmchiylrts. with the speeds of the high speeds RMi :: e of the critical speeds, for fish to be caught, leading to the demolition of the pi-b to the cross-section of the suction pipe / pipe.

FIG. 1 depicts a fish tank. A fox nak.onenchik, view, but figs, 2 - L in fig. one .

The inlet end of the cylindrical hollow tip contains a suction body 1 with a fish intake section 2, in the side walls of the hollow body 1 at a distance of three grams, holes 3 are fixed with an optimum half a diameter from the sections, to which guide pipes k are fixed, which form in the hollow body 1 and in front of its fish intake section 2 there is a helical fishing stream.

Input fish inlet tip works as follows.

During operation of the fish pump (not shown), by reducing the pressure in the suction hollow body 1 before its fish intake section 2, a zone of flow speeds directed towards the slice 2 is created. Part of the flow enters the cylindrical suction hollow body and through the holes 3 in the side walls of the hollow body 1. Since the nozzles in the cross section to the axis of the pipe 1 are tangentially fixed, and their inlets are the same direction, i.e. when walking around pipe 1 in one direction, they are uniformly visible; for example, towards the bypassing fish-containing stream in the hollow body and adjacent to section 2, the space is twisted. The holes 3 connecting the guide pipes k with the internal space of the pipe are located at a distance of up to three with an optimum of 0.5 of the diameter of the pipe 1 from its inlet collecting section 2, since when the stream enters the cylindrical hollow body due to its compression - in the space along the side walls, a zone with reduced pressure - vacuum is formed, and the length of this zone is from the inlet orifice to a section remote from it downstream, to 2H of the diameter of the hollow cylindrical housing- W.- l will reach a maximum nor rsssso nn: 0.5 diameter from the inlet of the cylindrical pipe. Filing a stream from the BHCiunero pier to the maximum vacuum zone as tangentially attached to the fixed guide nozzles allows the surgeon to create a vacuum zone inside the hollow body and twist the stream in front of its fish intake section 2.

The fish enters the inlet fishing section 2 of the suction canopy of hull 1 when it enters a zone where the current speeds are above the critical swimming speeds for fish VKp, i.e., the speeds at which the fish cannot resist the flow for a long time, same time against the current. In the absence of rotation of the flow around the inlet fish section 2, the flow velocity V is directed parallel to the nearest. When creating a screw motion, before the entrance fish intake section 2, besides the radial component of velocity V, there is a tangential velocity of rotational motion W, the resulting flow velocity at each point is the vector sum of V and K. The magnitude of the resultant velocity, U V –M, is always greater than the radial component.

/ 1l, the maximum rotational speed of the axis of the nozzles should be with the plane of the fish intake section angle depending on the flow rate of the fish pump, the diameter of the suction pipe and the proportion of flow through the direction 10

n {W: jRG

The total nozzle for the overall operation may vary from zero (the nozzle axes lie in a plane parallel to the intake section, i.e., the plane perpendicular to the axis of the pipe). values not exceeding 0, since in the latter case the nozzle becomes parallel to the axis of the fish-aorn tip and cannot create a screw movement of the stream in front of its fish intake section.

15B due to the fact that pvH. Is oriented relative to ve; The mountain of the flow velocity, with a screw flow, the boundary of the zone of critical soon gay currents with the same flow rates in the PS2 pipe, is more than

a long distance from its intake section 2.

Claims (1)

Invention Formula A fish inlet nozzle comprising a cylindrical hollow body with an inlet portion, characterized in that to increase the productivity of fishing using a fish pump, it is equipped with a device for swirling a water stream consisting of guide nozzles in the wall of the cylindrical body at a distance from the inlet section, not with roaring 3d, where d is the diameter of the cylindrical body; rigid attachment of guide pipes in them, the latter being placed tangentially and in the same direction. i, vvt .C -V.- rw 3 / V / J