CN114847198A - Floating fish egg continuous collection device and use method thereof - Google Patents

Floating fish egg continuous collection device and use method thereof Download PDF

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Publication number
CN114847198A
CN114847198A CN202210444898.6A CN202210444898A CN114847198A CN 114847198 A CN114847198 A CN 114847198A CN 202210444898 A CN202210444898 A CN 202210444898A CN 114847198 A CN114847198 A CN 114847198A
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collecting
water
net
collecting barrel
outlet pipe
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CN202210444898.6A
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CN114847198B (en
Inventor
祝斐
张志勇
王亚军
贾超峰
胡佳宝
孟乾
高波
孙瑞健
徐大凤
於明伟
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JIANGSU MARINE FISHERIES RESEARCH INSTITUTE
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JIANGSU MARINE FISHERIES RESEARCH INSTITUTE
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01KANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K61/00Culture of aquatic animals
    • A01K61/10Culture of aquatic animals of fish
    • A01K61/17Hatching, e.g. incubators
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81Aquaculture, e.g. of fish

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Zoology (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)

Abstract

The invention discloses a continuous collecting device for floating fish eggs and a using method thereof, comprising a collecting barrel, a collecting net arranged at the upper end opening of the collecting barrel and a water pump arranged in the collecting barrel, the outlet of the water pump is communicated with a plurality of water outlet pipes which are uniformly distributed in the circumferential direction, the other end of each water outlet pipe is positioned outside the collecting barrel and is provided with a downward back flushing opening, the side surface of the water outlet pipe is also communicated with two side spray pipes positioned outside the collecting barrel, the invention pumps water in the collecting barrel to the outside of the collecting barrel through a water pump, thereby forming negative pressure at the opening at the upper end of the collecting barrel, sucking the fish eggs on the water surface into the collecting barrel, filtering the fish eggs through the collecting net and remaining in the collecting net, thereby realize the continuity and receive the ovum, be difficult to hinder the roe, and the collecting vessel can prevent on the one hand that parent fish from getting into to collect the net to the pond water spray in, can rivers amazing on the one hand, improves parent fish fertility rate and hatchability.

Description

Floating fish egg continuous collection device and use method thereof
Technical Field
The invention relates to the field of fish egg collection, in particular to a floating fish egg continuous collection device and a using method thereof.
Background
Many cultured marine fishes such as silvery pomfret, yellow croaker, black porgy and the like have the characteristic of continuous, multiple batches and a small amount of spawning in the spawning period from 3 to 5 months of each year, and many of the spawns are floating or semi-floating spawns after fertilization. In order to collect the fish eggs as much as possible, it has been necessary to collect the fish eggs by using an artificial trawl or by draining a large amount of water and then filtering the drained seawater with a net. The fish eggs can be damaged, the hatchability of the fries is reduced, a large amount of labor and water resources are wasted, parent fish can be easily scratched when the fries are fished, and the fries are frightened.
Application number is 201820581964.3's utility model patent discloses a silvery pomfret roe circulation collection device, need turn off the air stone in the spawning pond when collecting the roe, can not accomplish continuous collection, and the roe consumes oxygen rate height needs incessant oxygenation, just so can guarantee the hatchability.
The invention patent with application number 201610825748.4 discloses a device and a method for collecting floating fish eggs, wherein the water density of a pond is adjusted before a purse net is furled, and the water density of the pond is confirmed to be adjusted, and the semi-floating fish eggs in the pond are completely floated on the water surface, namely the area of a common parent fish pond is 20m 3 Above the water body, the water density of the adjusting tank is hard, the parent fish spawning is asynchronous, and the parent fish needs to be adjusted again when being collected next time. And the purse net consists of an upper head line, a lower head line and a long and narrow rectangular net, wherein the upper head line is connected with a floater, the lower head line is connected with a pendant, some fishes are middle and upper layer fishes, and after the parent fishes lay eggs, the parent fishes are easy to be injured or collected when the net is collectedIn case of scaring, the present invention is not a continuous egg collection.
The invention patent with the patent number ZL201010239746.X discloses a facility and a method for collecting industrial cultured floating eggs, and the use method comprises the following steps: the water for cultivation flows into the cultivation pool through the water inlet pipe, forms gentle water surface circulation in the pool, drives the floating eggs to be discharged into the floating egg collecting net cage outside the pool through the water discharge pipe, the floating eggs are collected in the net cage through net clothing separation, and the water is discharged through the water discharge pipe of the glass fiber reinforced plastic groove. This piece needs a large amount of drainage, and is fixed when collecting the box with a net, can not accomplish to change and collect in succession.
Also, for example, patent No. ZL201110232454.8 discloses an automatic collection device for semi-floating fish eggs, which belongs to local collection and can not collect fish eggs continuously, and the mesh bag needs to be bound, so that the replacement time is long.
Therefore, the existing collecting devices for the floating fish eggs have the defects of large power consumption and low collecting rate.
Disclosure of Invention
In order to solve the technical problems, the invention provides the following technical scheme:
the invention relates to a continuous collection device for floating fish eggs and a using method thereof, and the continuous collection device comprises a collection barrel, a collection net arranged at the upper end opening of the collection barrel, and a water pump arranged in the collection barrel, wherein the outlet of the water pump is communicated with a plurality of water outlet pipes which are uniformly distributed in the circumferential direction, the other ends of the water outlet pipes are positioned outside the collection barrel and provided with downward back flushing ports, the side surfaces of the water outlet pipes are also communicated with two side spray pipes positioned outside the collection barrel, the end parts of the side spray pipes are connected with a blocking block in a sliding manner, the blocking block is provided with a conical head inserted into the end openings of the side spray pipes, and the continuous collection device further comprises a regulating device for regulating the insertion amount of the conical head in the side spray pipes.
As a preferred technical scheme of the invention, a spray pipe sliding sleeve is connected on the side spray pipe in a sliding manner, the plugging block is fixedly connected with the spray pipe sliding sleeve through a connecting rod, the adjusting device comprises a water outlet pipe sliding sleeve connected on a water outlet pipe in a sliding manner, a driving ring connected on the outer ring of the collecting barrel in a shaft coupling manner and an inserting shaft fixedly connected on the water outlet pipe sliding sleeve, the lower end face of the driving ring is provided with a slot matched with the inserting shaft, the distance from the slot to the center of the driving ring is gradually increased along the circumferential direction, the upper part and the lower part of the spray pipe sliding sleeve are both provided with driving pull rods, one end of each driving pull rod is hinged with the spray pipe sliding sleeve, and the other end of each driving pull rod is hinged with the water outlet pipe sliding sleeve.
As a preferred technical solution of the present invention, the adjusting device further includes a vertical gear rod axially connected to the outer side of the collecting barrel, one end of the gear rod is fixedly connected to an adjusting gear, the other end of the gear rod is fixedly connected to a hand wheel, and the driving ring is provided with external teeth engaged with the adjusting gear.
As a preferable technical scheme of the invention, the center of the plugging block is provided with a through hole coaxial with the side nozzle.
As a preferred technical scheme of the invention, the outlet of the water pump is communicated with a water distribution box, and the water outlet pipe is communicated with the side surface of the water distribution box.
As a preferable technical scheme of the invention, the collecting net comprises a net ring, a net bag and a handle fixedly connected to the net ring.
As a preferable technical scheme of the invention, the upper end of the collecting barrel is an outwards convex spherical surface.
As a preferable technical scheme of the invention, a water separating pump and filter cloth with an opening at the upper end of the collecting barrel are arranged in the collecting barrel.
The use method of the floating fish egg continuous collecting device comprises the following steps:
a. the collecting barrel is placed under water, water in the collecting barrel is pumped out of the collecting barrel through a water pump, so that negative pressure is formed at an opening at the upper end of the collecting barrel, and fish eggs on the water surface are pumped into the collecting barrel and are filtered through a collecting net to be left in the collecting net;
b. continuous collection is realized by pumping of a water pump, collection at different positions is realized by moving a collection device, a collection net can be replaced at any time in the process, the collection net is only placed on the mouth surface, the collection net with fish eggs only needs to be taken out during replacement, then a new collection net is placed, and the collection net can be replaced at any time in the process;
c. part of water pumped by the water pump flows out through the downward backwashing port, so that the collecting device is pushed upwards and reversely to be kept at a certain underwater height;
d. part of water pumped by the water pump is sprayed to the side surface through the side spray pipe, so that the parent fish can be prevented from entering the collecting net, and the fertility rate and the hatchability of the parent fish can be improved through water flow stimulation;
e. the insertion amount of the conical head in the side spray pipe is adjusted through the adjusting device, so that the water yield of the back flushing port is adjusted, and the collecting device is suitable for different collecting device weights.
The invention has the beneficial effects that:
according to the invention, the collecting barrel is placed under water, water in the collecting barrel is pumped out of the collecting barrel through the water pump, so that negative pressure is formed at the opening at the upper end of the collecting barrel, fish eggs on the water surface are pumped into the collecting barrel and filtered through the collecting net to be left in the collecting net, so that continuous egg collection is realized, the fish eggs are not easy to be injured, and the collecting barrel can prevent parent fish from entering the collecting net when spraying water into the pond, so that water flow stimulation can be realized, and the fertility rate and the hatching rate of the parent fish can be improved.
The method has the advantages of low consumption of manpower and material resources, small damage to fish eggs, high hatching rate, difficulty in frightening and damaging the parent fish, convenience in checking whether the parent fish spawns, realization of uninterrupted and continuous collection of the fish eggs, improvement of fish egg collection efficiency, saving of manual investment, reduction of power cost, and reduction of damage to the fish eggs and the parent fish
The invention can control the collecting barrel to lift underwater, so as to adjust the distance between the collecting barrel and the water surface, and can be used for collecting semi-floating fish eggs.
Drawings
FIG. 1 is an internal schematic view of the present invention;
FIG. 2 is an external schematic view of the present invention;
FIG. 3 is an enlarged view taken at A of FIG. 1 in accordance with the present invention;
FIG. 4 is a view of the invention taken in the direction B of FIG. 3;
FIG. 5 is a view of the invention taken along line C of FIG. 3;
FIG. 6 is a cross-sectional view taken along plane D-D of FIG. 3 in accordance with the present invention;
FIG. 7 is a bottom schematic view of the drive ring of the present invention;
in the figure: 1. the device comprises a collecting barrel, 2, a collecting net, 3, filter cloth, 4, a water pump, 5, a water distribution box, 6, a water outlet pipe, 7, a back flushing port, 8, a side spray pipe, 9, a plugging block, 10, a connecting rod, 11, a spray pipe sliding sleeve, 12, a water outlet pipe sliding sleeve, 13, an inserting shaft, 14, a driving ring, 15, an inserting groove, 16, an adjusting gear, 17, a gear rod, 18, a hand wheel, 19, a driving pull rod, 21, a net ring, 22, a net bag, 23 and a handle.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
As shown in fig. 1-7, the device for continuously collecting floating fish eggs comprises a collecting barrel 1, a collecting net 2 placed at an upper end opening of the collecting barrel 1, and a water pump 4 installed in the collecting barrel 1, wherein the collecting net 2 comprises a net ring 21, a net bag 22, and a handle 23 fixedly connected to the net ring 21, the net ring 21 is placed at the upper end opening of the collecting barrel 1, the net bag 22 is located in the collecting barrel 1, and the collecting net 2 is taken and placed by holding the handle 23.
The cross-section of collecting vessel 1 is circular, and water pump 4 is located the axis department of collecting vessel 1, and is located the position under the bias, the export intercommunication of water pump 4 has the outlet pipe 6 of a plurality of circumference equipartitions, and the import of water pump 4 is down in this embodiment, and the export is up, the export intercommunication of water pump 4 has knockout box 5, outlet pipe 6 intercommunication is in knockout box 5 sides, and outlet pipe 6 is provided with 4 in this embodiment, and outlet pipe 6 transversely sets up, and one end intercommunication is outside collecting vessel 1 is stretched out to the other end in knockout box 5 sides.
The upper end of the collecting barrel 1 is a spherical surface protruding outwards, so that a vortex is formed around the opening at the upper end of the collecting barrel 1, the direct impact of the roes and the net bag 22 is reduced, and the roes are protected.
The collecting barrel 1 is internally provided with a filter cloth 3 for separating the water pump 4 and the upper end opening of the collecting barrel 1, the filter cloth is positioned above the water pump 4 and covers the cross section of the collecting barrel 1, on one hand, the roes are prevented from entering the water pump 4 after passing through the net bag 22, and on the other hand, the negative pressure at the upper end opening of the collecting barrel 1 is uniform.
As shown in fig. 3, the other end of the water outlet pipe 6 is located outside the collecting barrel 1 and is provided with a downward back flushing port 7, in this embodiment, the other end of the water outlet pipe 6 is bent downward, so that the pipe orifice forms the back flushing port 7, the inner diameter of the back flushing port 7 is smaller than that of the water outlet pipe 6, and the back flushing port 7 is vertically downward, so that the collecting barrel 1 is kept at a certain position below the liquid level through the back flushing effect.
As shown in fig. 3 and 4, the side surface of the water outlet pipe 6 is further communicated with two side spray pipes 8 positioned outside the collecting barrel 1, the side spray pipes 8 are perpendicular to the water outlet pipe 6, the two side spray pipes 8 are symmetrically arranged relative to the water outlet pipe 6, the pipe orifices of the side spray pipes 8 face the side surface, water flow stimulation is carried out on surrounding fish, parent fish is prevented from entering the collecting net, and the fertilization rate and the hatching rate of the parent fish can be improved.
As shown in fig. 6, the end of the side nozzle 8 is connected with a block 9 in a sliding manner, the block 9 is provided with a conical head inserted into the end of the side nozzle 8, the center of the block 9 is provided with a through hole coaxial with the side nozzle 8, the size of the gap between the block 9 and the nozzle can be adjusted by adjusting the insertion amount of the block 9, so that the water yield is adjusted, the through hole at the center of the block 9 transversely sprays water flow, and the water flow sprayed from the block 9 and the nozzle is matched to stimulate the water flow of the parent fish.
Because the sprue 9 is located the mouth of pipe of side spout 8, in order to realize the sliding connection of sprue 9 on side spout 8, it has spray tube sliding sleeve 11 to slide on the side spout 8, and spray tube sliding sleeve 11 overlaps on side spout 8, sprue 9 passes through connecting rod 10 and 11 rigid couplings of spray tube sliding sleeve, and connecting rod 10 is provided with 4 and follows 8 circumference equipartitions of side spout to realize the sliding connection of sprue 9 on side spout 8.
Because the water in the water outlet pipe 6 flows out through the side spray pipe 8 and the backflushing port 7, the water yield of the backflushing port 7 can be adjusted by adjusting the water yield of the side spray pipe 8, and the water yield of the side spray pipe 8 can be adjusted by adjusting the insertion amount of the conical head in the side spray pipe 8.
And the device also comprises an adjusting device for adjusting the insertion amount of the conical head in the side spray pipe 8. The adjusting device comprises a water outlet pipe sliding sleeve 12 connected with the water outlet pipe 6 in a sliding manner, a driving ring 14 connected with the outer ring of the collecting barrel 1 in a shaft coupling manner, and an inserting shaft 13 fixedly connected with the water outlet pipe sliding sleeve 12, wherein the water outlet pipe sliding sleeve 12 is sleeved on the water outlet pipe 6 and is positioned on one side of the side spraying pipe 8 close to the collecting barrel 1, and the water outlet pipe sliding sleeve 12 can slide on the water outlet pipe 6.
The driving ring 14 is sleeved on the outer ring of the collecting barrel 1 and can rotate, the water outlet pipe sliding sleeve 12 is positioned below the driving ring 14, the inserting shaft 13 is vertically and fixedly connected to the upper end of the water outlet pipe sliding sleeve 12, the lower end face of the driving ring 14 is provided with an inserting groove 15 matched with the inserting shaft 13, and the distance from the inserting groove 15 to the center of the driving ring 14 is gradually increased along the circumferential direction, so that the water outlet pipe sliding sleeve 12 can be driven to slide on the water outlet pipe 6 by rotating the driving ring 14.
The adjusting device further comprises a vertical gear rod 17 which is connected to the outer side of the collecting barrel 1 in a shaft mode, one end of the gear rod 17 is fixedly connected with an adjusting gear 16, the other end of the gear rod 17 is fixedly connected with a hand wheel 18, and external teeth meshed with the adjusting gear 16 are arranged on the driving ring 14. By rotating the hand wheel 18, the drive ring 14 can be rotated by the adjusting gear 16.
Drive pull rod 19 is all equipped with from top to bottom of spray tube sliding sleeve 11, drive pull rod 19's one end is articulated with spray tube sliding sleeve 11, and the other end is articulated with outlet pipe sliding sleeve 12, and the equal vertical setting of articulated shaft at drive pull rod 19 both ends consequently, through the slip of outlet pipe sliding sleeve 12, can drive two spray tube sliding sleeves 11 relative sliding to adjust the insertion volume of two sprue 9 simultaneously. So that the adjustment of the insertion amount of all the blocks 9 is achieved by rotating the drive ring 14.
Through adjusting the insertion amount of two sprue 9, can realize the regulation of the 7 water yield of backflushing mouth to can control the collecting vessel and carry out the lift operation under water, thereby adjust the distance with the surface of water, consequently also can be used for the collection of semi-floating fish egg.
The use method of the floating fish egg continuous collecting device comprises the following steps:
a. collecting vessel 1 places under water, takes out collecting vessel 1 through water pump 4 in with collecting vessel 1 outside water to form the negative pressure at collecting vessel 1 upper end opening part, thereby the roe suction on the surface of water is in collecting vessel 1 and filters through collecting net 2 and stays in collecting net 2.
b. The suction through the water pump realizes collecting in succession, realizes the collection of different positions through removing collection device, and the in-process can be changed at any time and collect net 2, because collect the net and only place at the face of a mouth, only need take out the collection net that has the roe during change, place a new collection net afterwards can, the in-process can be changed at any time and collect the net.
c. Part of water pumped by the water pump 4 flows out through the downward backwashing port 7, so that the collecting device is pushed back upwards to be kept at a certain underwater height, and the port surface is properly kept underwater for 3-10cm when working.
d. Some water pumped out by the water pump 4 is sprayed to the side through the side spray pipe 8, so that the parent fish can be prevented from entering the collecting net 2, and the fertility rate and the hatching rate of the parent fish can be improved through water flow stimulation.
e. The insertion amount of the conical head in the side spray pipe 8 is adjusted through an adjusting device, so that the water yield of the back flushing port 7 is adjusted, and different collecting device weights are adapted.
Finally, it should be noted that: in the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The utility model provides a continuous collection device of buoyancy fish egg which characterized in that: including collecting vessel (1), place in collecting vessel (1) upper end open-ended collection net (2) and install water pump (4) in collecting vessel (1), the export intercommunication of water pump (4) has outlet pipe (6) of a plurality of circumference equipartitions, the other end of outlet pipe (6) is located collecting vessel (1) outer and is equipped with decurrent recoil mouth (7), the side of outlet pipe (6) still the intercommunication have two side spray tubes (8) that are located collecting vessel (1) outer, the tip sliding connection of side spray tube (8) has sprue (9), be equipped with on sprue (9) and insert the interior cone head of side spray tube (8) port, still including the adjusting device of adjusting cone head volume in side spray tube (8).
2. The device for continuously collecting the floating fish eggs, as claimed in claim 1, wherein: it has spray tube sliding sleeve (11) to slide on side spray tube (8), sprue (9) are through connecting rod (10) and spray tube sliding sleeve (11) rigid coupling, adjusting device is including sliding connection outlet pipe sliding sleeve (12) on outlet pipe (6), hub connection driving ring (14) and rigid coupling insert axle (13) on outlet pipe sliding sleeve (12) in collecting vessel (1) outer lane, the lower terminal surface of driving ring (14) is opened has slot (15) of holding and is inserted axle (13) adaptation, slot (15) increase gradually along circumference to the distance at driving ring (14) center, drive pull rod (19) all are equipped with from top to bottom of spray tube sliding sleeve (11), the one end of drive pull rod (19) is articulated with spray tube sliding sleeve (11), and the other end is articulated with outlet pipe sliding sleeve (12).
3. The device for continuously collecting the floating fish eggs, as claimed in claim 2, wherein: the adjusting device further comprises a vertical gear rod (17) which is connected to the outer side of the collecting barrel (1) in a shaft mode, an adjusting gear (16) is fixedly connected to one end of the gear rod (17), a hand wheel (18) is fixedly connected to the other end of the gear rod, and outer teeth meshed with the adjusting gear (16) are arranged on the driving ring (14).
4. The device for continuously collecting the floating fish eggs, as claimed in claim 1, wherein: the center of the plugging block (9) is provided with a through hole which is coaxial with the side spray pipe (8).
5. The device for continuously collecting the floating fish eggs, as claimed in claim 1, wherein: an outlet of the water pump (4) is communicated with a water distribution box (5), and a water outlet pipe (6) is communicated with the side surface of the water distribution box (5).
6. The device for continuously collecting the floating fish eggs, as claimed in claim 1, wherein: the collecting net (2) comprises a net ring (21), a net bag (22) and a handle (23) fixedly connected to the net ring (21).
7. The device for continuously collecting the floating fish eggs, as claimed in claim 1, wherein: the upper end of the collecting barrel (1) is an outward convex spherical surface.
8. The device for continuously collecting the floating fish eggs, as claimed in claim 1, wherein: the collecting barrel (1) is internally provided with a separation water pump (4) and a filter cloth (3) with an opening at the upper end of the collecting barrel (1).
9. A use method of the floating roe continuous collection device of claims 1 to 8, characterized by comprising the following steps:
a. the collecting barrel (1) is placed under water, water in the collecting barrel (1) is pumped out of the collecting barrel (1) through the water pump (4), so that negative pressure is formed at an opening at the upper end of the collecting barrel (1), and fish eggs on the water surface are pumped into the collecting barrel (1) and filtered through the collecting net (2) to be left in the collecting net (2);
b. continuous collection is realized by pumping of the water pump (4), collection at different positions is realized by moving the collecting device, and the collecting net (2) can be replaced at any time in the process;
c. part of water pumped by the water pump (4) flows out through the downward backwashing port (7), so that the collecting device is pushed upwards and reversely, and is kept at a certain underwater height;
d. part of water pumped by the water pump (4) is sprayed to the side through the side spray pipe (8), so that parent fish can be prevented from entering the collecting net (2), and the fertility rate and the hatchability of the parent fish can be improved through water flow stimulation;
e. the insertion amount of the conical head in the side spray pipe (8) is adjusted through an adjusting device, so that the water yield of the back flushing port (7) is adjusted, and different collecting device weights are adapted.
CN202210444898.6A 2022-04-26 2022-04-26 Floating fish egg continuous collection device and use method thereof Active CN114847198B (en)

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