CN114467810A - Method and system for collecting and cultivating large-size fish fries by natural baits in reservoir - Google Patents
Method and system for collecting and cultivating large-size fish fries by natural baits in reservoir Download PDFInfo
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- CN114467810A CN114467810A CN202210096278.8A CN202210096278A CN114467810A CN 114467810 A CN114467810 A CN 114467810A CN 202210096278 A CN202210096278 A CN 202210096278A CN 114467810 A CN114467810 A CN 114467810A
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- 241000251468 Actinopterygii Species 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 90
- 238000012258 culturing Methods 0.000 claims abstract description 14
- 235000013332 fish product Nutrition 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 49
- 238000009395 breeding Methods 0.000 claims description 14
- 230000001488 breeding effect Effects 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 14
- 238000005070 sampling Methods 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 5
- 239000012780 transparent material Substances 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims 3
- 230000004083 survival effect Effects 0.000 abstract description 6
- 238000009360 aquaculture Methods 0.000 abstract description 2
- 244000144974 aquaculture Species 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 241000252234 Hypophthalmichthys nobilis Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000011218 seed culture Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 241001466804 Carnivora Species 0.000 description 1
- 241000252232 Hypophthalmichthys Species 0.000 description 1
- 241000269319 Squalius cephalus Species 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 230000000384 rearing effect Effects 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/10—Culture of aquatic animals of fish
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/60—Floating cultivation devices, e.g. rafts or floating fish-farms
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/80—Feeding devices
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, 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)
- Farming Of Fish And Shellfish (AREA)
Abstract
The invention discloses a method for collecting and cultivating large-sized fish fries by natural baits in a reservoir, relates to the technical field of aquaculture, and solves the technical problems that the fish fries stocked in the reservoir are too small, the survival rate is low or the cost of the stocked fish fries is too large, and the method comprises the following steps: arranging a fish species culturing net cage in the reservoir, and stocking young fish fries in the fish species culturing net cage; dividing the water depth of a reservoir into a plurality of depth layers, and detecting the floating swim mass of each depth layer; extracting the zooplankton in the depth layer with the highest zooplankton amount, and conveying the zooplankton to the fish culture net cage; and (3) after the young fish fries are cultured for a set time or grow to a set weight, directly putting the young fish fries into a reservoir for continuous culture to obtain fish products. The invention also discloses a system for realizing the method. The method can cultivate large-size fish species in a large-water-surface reservoir in a feed-free mode, the cultivation survival rate is high, the fish species can be really placed into the reservoir after cultivation, the cost is saved, and the operation is convenient.
Description
Technical Field
The invention relates to the technical field of aquaculture, in particular to a method and a system for collecting and cultivating large-sized fish fries by reservoir natural baits.
Background
With the national emphasis on environmental protection, the quality and environment of reservoir water are highly emphasized, many reservoirs are water sources, and development of fishery by utilizing the reservoirs faces a new subject. At present, bait casting net cages of reservoirs are forbidden, and only water-purifying fishes, such as water-filtering fishes, such as silver carps, bighead carps and the like can be thrown, so that fish products can be obtained while water quality is purified. Because some carnivorous fishes and other carnivores exist in the reservoir, in the fry stocking process of the reservoir, if the fry is too small, the survival rate is low, and the effect of proliferation and releasing cannot be achieved; if large-scale fry are stocked, especially in large-area reservoirs, the stocking quantity is large, the cost is high, and the transportation in mountainous areas of the reservoir is inconvenient.
On the other hand, a large number of zooplankton exist in the reservoir and are natural baits for large-scale seedling culture, but the baits are distributed in water layers of different depths of the reservoir and can shift along with weather, day and night and seasons, so that the feeding of seedlings is inconvenient.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, and aims to provide a method for collecting and cultivating large-sized fish fries by using natural baits in a reservoir, so that the survival rate of the fish fries put in the reservoir can be ensured, and the cost can be reduced.
The invention also aims to provide a system for collecting and cultivating large-size fish fries by using natural baits in a reservoir, which can ensure the survival rate of the fish fries put in the reservoir and reduce the cost.
In order to realize the first purpose, the invention provides a method for collecting and cultivating large-size fish fries by reservoir natural baits, which comprises the following steps:
arranging a fish species culturing net cage in a reservoir, and stocking young fish fries in the fish species culturing net cage;
dividing the water depth of the reservoir into a plurality of depth layers, and detecting the floating swim mass of each depth layer;
extracting the zooplankton in the depth layer with the highest zooplankton amount, and conveying the zooplankton to the fish culture net cage;
and (3) culturing the young fish fries for a set time or growing the young fish fries to a set weight to obtain large-size fish fries, and directly putting the large-size fish fries into the reservoir to continue culturing to obtain fish products.
As a further improvement, the length of the young fry is 1.2-1.8 cm.
Further, the plurality of depth layers comprises 2, 4, 6, 8 meters.
Further, 2 hours of zooplankton were extracted each in the morning, noon, and evening of each day.
Further, the set time is 42-48 days, and the set weight is 4.5-5.5 g.
In order to achieve the second purpose, the invention provides a system for collecting and cultivating large-sized fish fries in a reservoir by natural baits, which comprises a fish cultivating net cage, a zooplankton detection device, a water pump grouping and a control module, wherein the zooplankton detection device comprises a plurality of collecting bottles and first water pumps which are equal in number to the collecting bottles and correspond to the collecting bottles one by one, the first water pumps are connected with sampling pipes corresponding to different depth layers, the first water pumps are electrically connected with the same control switch, a filter screen which divides the collecting bottles into a detection part and a water collection part is arranged in the collecting bottles, an output port of each first water pump is communicated with the detection part through a water inlet pipe, the water collection part is provided with a water return pipe, the detection part is provided with a turbidity detection mechanism, the water pump grouping comprises second water pumps which are equal in number to the collecting bottles and correspond to the collecting bottles one by one, the second water pumps are connected with pumping pipes corresponding to the different depth layers, the delivery outlet of second water pump is equipped with and is used for carrying zooplankton to the conveyer pipe of fingerling culture box with a net, control module electric connection turbidity detection mechanism, second water pump.
As a further improvement, the control module is a multi-line single-pass device, the turbidity detection mechanism comprises a light source and a light sense switch which are respectively positioned at two sides of the detection part, the light source is connected with two ends of a power supply, the light sense switch is connected with two ends of the power supply after being connected with a diode bridge circuit in series, the other two ends of the diode bridge circuit are connected with a coil of a first relay, one end of the second water pump is connected with one end of the power supply through the multi-line single-pass device, and the other end of the second water pump is connected with the other end of the power supply through a contact of the first relay.
Furthermore, the multi-wire single-pass device comprises M control units which are sequentially connected in series, each control unit comprises M live wires, a zero line and M-1 second relays, and the live wires of the M control units are connected in a one-to-one correspondence manner; the N fire wire of the N control unit is connected in series with a direct current rectifier, the other M-1 fire wires of the N control unit are respectively and correspondingly connected in series with a normally closed contact of a second relay, the direct current rectifier supplies power to coils of the M-1 second relays, and each second water pump is correspondingly connected to the fire wire of the first or M control unit.
Furthermore, the light sensation switch is a photoresistor, the detection part is made of transparent materials, the sectional area of the detection part is smaller than that of the water collection part, the detection part and the water collection part are arranged up and down, and the water inlet pipe and the water return pipe are both close to the filter screen; the fish seed culture net cage is characterized in that the conveying pipes are connected to the same collecting pot, the collecting pot is connected with the fish seed culture net cage through a single pipe, and the conveying pipes are provided with one-way valves.
Furthermore, the control module is a single chip microcomputer or a PLC (programmable logic controller) or an industrial personal computer, and the turbidity detection mechanism is a turbidity meter or a correlation type photoelectric switch.
Advantageous effects
Compared with the prior art, the invention has the advantages that: according to the invention, the fish seed culturing net cages are arranged in the reservoir, young fish fries are cultured in the fish seed culturing net cages, and the zooplanktons in the depth layer with the highest zooplankton amount are extracted to the fish seed culturing net cages to feed the young fish fries, so that large-size fish seeds can be cultured in a large-water-surface reservoir in a feed-free manner, the culturing survival rate is high, the fish seeds can be placed in the reservoir after culturing, the cost is saved, and the operation is convenient.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a turbidity detecting mechanism according to the present invention;
FIG. 3 is a schematic structural diagram of the multi-line single-pass filter of the present invention;
fig. 4 is a schematic structural diagram of a control unit of the multi-line single-pass device in the invention.
Wherein: the system comprises a fish breeding net cage 1, a fish breeding net cage 2, a control module 3, a material collecting bottle 4, a first water pump 5, a sampling pipe 6, a control switch 7, a detection part 8, a water collecting part 9, a filter screen 10, a water inlet pipe 11, a water return pipe 12, a second water pump 13, a material pumping pipe 14, a delivery pipe 15, a light source 16, a light sensitive switch 17, a diode bridge circuit 18, a first relay 18, a collecting pot 19, a single pipe 20, a control unit 21, a live wire 22, a zero line 23, a second relay 24, a direct current rectifier 25 and a shunt resistor 26.
Detailed Description
The invention will be further described with reference to specific embodiments shown in the drawings.
Referring to fig. 1-4, a method for collecting and cultivating large-sized fish fries by using natural baits in a reservoir comprises the following steps:
the method comprises the following steps that (1) fish species breeding net cages 1 are arranged in a reservoir, the number of the fish species breeding net cages 1 can be set according to the area of the reservoir, 50 fish species breeding net cages 1 can be arranged in a large-area reservoir, the size of each fish species breeding net cage 1 is 5 multiplied by 6 multiplied by 2.5 meters, young fish fries are bred in the fish species breeding net cages 1, the length of each young fish fry is 1.2-1.8 centimeters, preferably, the length of each young fish fry is 1.5 centimeters, and about 24 thousands of young fish fries, such as aristichthys nobilis, chubs and other drainable fishes, are bred in each fish species breeding net cage 1;
dividing the water depth of a reservoir into a plurality of depth layers, and detecting the floating swimmer amount of each depth layer, wherein the depth layers comprise 2 meters, 4 meters, 6 meters and 8 meters;
extracting zooplankton in the depth layer with the highest zooplankton amount, conveying the zooplankton to the fish breeding net cage 1, and extracting the zooplankton for 2 hours in the morning, at noon and at night each day;
and (3) culturing the young fry for a set time or growing the young fry to a set weight to obtain large-sized fry, directly putting the large-sized fry into a reservoir to be continuously cultured to obtain fish products, wherein the set time is 42-48 days, the set weight is 4.5-5.5 g, preferably, the set time is 45 days, and the set weight is 5 g.
A system for collecting and cultivating large-size fish fries by natural baits in a reservoir comprises a fish cultivation net cage 1, a zooplankton detection device, a water pump marshalling and a control module 2, wherein the size of the fish cultivation net cage 1 is 5 multiplied by 6 multiplied by 2.5 meters. Zooplankton detection device includes a plurality of collecting bottle 3, equals and the first water pump 4 of one-to-one with collecting bottle 3 quantity, and first water pump 4 is connected with the sampling pipe 5 that corresponds to different degree of depth layers, and the sampling pipe 5 on different degree of depth layers includes 2, 4, 6, 8 meters, samples the zooplankton of 2, 4, 6, 8 meters degree of depth simultaneously through a plurality of first water pumps 4 and sampling pipe 5 promptly. The first water pump 4 is electrically connected with the same control switch 6, and the first water pump 4 is started or stopped simultaneously through the control switch 6. Be equipped with in the collecting bottle 3 and separate into detection part 7, the filter screen 9 of water-collecting part 8 with collecting bottle 3, inlet tube 10 intercommunication detection part 7 is passed through to the delivery outlet of first water pump 4, and water-collecting part 8 is equipped with wet return 11, and detection part 7 is equipped with turbidity detection mechanism, and the turbidity is big more and is shown that zooplankton volume is higher. The water pump marshalling includes the second water pump 12 that equals and the one-to-one with aggregate bottle 3 quantity, and second water pump 12 is connected with the pumping pipe 13 that corresponds to different depth layers, and the pumping pipe 13 of different depth layers includes 2, 4, 6, 8 meters, and the delivery outlet of second water pump 12 is equipped with the conveyer pipe 14 that is used for carrying zooplankton to fish species culture box with a net 1.2 electric connection turbidity detection mechanism of control module, second water pump 12, control module 2 detects the zooplankton volume on each depth layer simultaneously through turbidity detection mechanism to the second water pump 12 that the highest depth layer of control zooplankton volume corresponds opens, and other second water pumps 12 are for closed condition, thereby extract the most abundant zooplankton to fingerling culture box with a net 1.
In one embodiment, the control module 2 is a multi-line single-pass device, and after one line is connected in the multi-line single-pass device, other lines are restrained from being connected, so that the preferential power-on right is ensured, and the second water pump 12 of the water layer with the highest zooplankton quantity is ensured to be started.
The multi-wire single-pass device comprises M control units 21 which are sequentially connected in series, each control unit 21 comprises M live wires 22, a zero wire 23 and M-1 second relays 24, and the live wires 22 of the M control units 21 are connected in a one-to-one correspondence manner. The nth live wire 22 of the nth control unit 21 is connected in series with a direct current rectifier 25, the direct current rectifier 25 is connected in parallel with a shunt resistor 26, the other M-1 live wires 22 of the nth control unit 21 are respectively and correspondingly connected in series with a normally closed contact of a second relay 24, the direct current rectifier 25 supplies power to coils of the M-1 second relays 24, and each second water pump 12 is correspondingly connected to the live wire of the first or mth control unit 21.
In this embodiment, as shown in fig. 3 and 4, 4 first water pumps 4 are provided corresponding to depth layers of 2 meters, 4 meters, 6 meters and 8 meters, similarly, the number of the second water pumps 12 is 4, the zooplankton quantity of the depth layers of 2 meters, 4 meters, 6 meters and 8 meters is correspondingly extracted, the multi-line single-pass device comprises 4 control units 21 connected in series in sequence, each control unit 21 comprises 4 live wires 22, one zero wire 23 and 3 second relays 24, and the 4 second water pumps 12 are sequentially connected to the 4 live wires 22 of the fourth control unit 21. As shown in fig. 4, in the second control unit 21, the 2 nd fire wire 22 is connected in series with the dc rectifier 25, and the other fire wires 22 are respectively connected in series with the normally closed contacts of the second relay 24, and when the 2 nd fire wire 22 is powered first, the other fire wires 22 are disconnected, so that only the 2 nd fire wire is powered, the other fire wires are all disconnected, the second water pump 12 corresponding to the 2 nd fire wire is powered to start, and the other second water pumps 12 cannot start. The operation of the control unit 21 is similar.
The turbidity detection mechanism comprises a light source 15 and a light sense switch 16 which are respectively positioned at two sides of the detection part 7, the light sense switch 16 is characterized in that light is conducted in dark and blocked, the light source 15 is connected with two ends of a power supply, the light sense switch 16 is connected with two ends of the power supply after being connected with a diode bridge circuit 17 in series, the other two ends of the diode bridge circuit 17 are connected with a coil of a first relay 18, one end of a second water pump 12 is connected with one end of the power supply through a multi-wire single-pass device, and the other end of the second water pump 12 is connected with the other end of the power supply through a contact of the first relay 18. The light sensitive switch 16 is a photo resistor, and the detecting part 7 is made of transparent material. When light is emitted, the light sensitive switch 16 is turned off, and when the light in the detection section 7 is dark to a certain degree due to the concentration of zooplankton, the light sensitive switch 16 is turned on. In all the material collecting bottles 3, the light sensitive switch 16 corresponding to the detection part 7 with the highest zooplankton density is firstly switched on, so that the second water pump 12 on the depth layer is driven to be started, and rich bait is provided for the fry of the fry rearing net cage 1.
The sectional area of detection portion 7 is less than the sectional area of water-collecting part 8, and detection portion 7, water-collecting part 8 are arranged from top to bottom, and inlet tube 10, wet return 11 all are close to filter screen 9. The opening of the water return pipe 11 is slightly lower than the water inlet pipe 10 in the detection part 7, so that water enters the detection part 7 from the sampling pipe 5, flows into the water collection part 8 from the filter screen 9, and then flows out from the water return pipe 11, and zooplankton in the water can be gathered in the detection part 7. The flow velocity of the water inlet pipe 10 of the detection part 7 is small enough not to press the zooplankton collected in the detection part 7 on the filter screen 9, and the zooplankton can freely move.
The lower extreme of detection portion 7 is equipped with the drain valve, and through the synchronous switching of each drain valve of drainage control switch unified control, return pipe 11 is equipped with the return valve, through the synchronous switching of return control switch unified control each return valve, at every inspection time, opens the drain valve earlier, closes the return valve, after to detection portion 7 washing, closes the drain valve again, opens the return valve, detects the volume of floating swimming.
The plurality of delivery pipes 14 are connected to the same collection pot 19, the collection pot 19 is connected to the fish species breeding net cage 1 through a single pipe 20, water of all the second water pumps 12 is collected to the collection pot 19 first and then delivered to the fish species breeding net cage 1 through the single pipe 20, and the delivery pipes 14 are provided with check valves which can prevent the water from flowing backwards.
In one embodiment, the control module 2 is a single chip microcomputer or a PLC (programmable logic controller) or an industrial personal computer, and the turbidity detection mechanism is a turbidity meter or a correlation type photoelectric switch.
The above are only preferred embodiments of the present invention, and it should be noted that it is obvious to those skilled in the art that various changes and modifications can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicability of the patent.
Claims (10)
1. A method for collecting and cultivating large-size fish fries by natural baits in a reservoir is characterized by comprising the following steps:
arranging a fish species breeding net cage (1) in a reservoir, and stocking young fish fries in the fish species breeding net cage (1);
dividing the water depth of the reservoir into a plurality of depth layers, and detecting the floating swim mass of each depth layer;
extracting the zooplankton in the depth layer with the highest zooplankton amount, and conveying the zooplankton to the fish seed cultivation net cage (1);
and (3) culturing the young fish fries for a set time or growing the young fish fries to a set weight to obtain large-size fish fries, and directly putting the large-size fish fries into the reservoir to continue culturing to obtain fish products.
2. The method for collecting and cultivating the large-size fish fries with the natural bait for the reservoir according to claim 1, wherein the length of the young fish fries is 1.2-1.8 cm.
3. The method for collecting natural bait for a reservoir to cultivate large-size fry according to claim 1, wherein the plurality of depth layers comprise 2, 4, 6 and 8 meters.
4. The method for collecting and cultivating large-sized fish fries with natural bait in the reservoir as claimed in claim 1, wherein 2 hours of zooplankton are extracted in the morning, noon and evening of each day.
5. The method for collecting and cultivating the large-sized fish fries with the natural bait for the reservoir according to claim 1, wherein the set time is 42-48 days, and the set weight is 4.5-5.5 g.
6. The system for collecting and cultivating large-specification fish fries by natural baits in the reservoir is characterized by comprising a fish breeding net cage (1), zooplankton detection devices, a water pump marshalling group and a control module (2), wherein each zooplankton detection device comprises a plurality of collecting bottles (3) and first water pumps (4) which are equal in number and correspond to the collecting bottles (3) one by one, each first water pump (4) is connected with sampling pipes (5) corresponding to different depth layers, each first water pump (4) is electrically connected with the same control switch (6), a filter screen (9) which separates the collecting bottles (3) into a detection part (7) and a water collection part (8) is arranged in each collecting bottle (3), an output port of each first water pump (4) is communicated with the detection part (7) through a water inlet pipe (10), the water collection part (8) is provided with a water return pipe (11), and the detection part (7) is provided with a turbidity detection mechanism, the water pump marshalling includes with collecting bottle (3) quantity equals and the one-to-one second water pump (12), second water pump (12) are connected with pumping pipe (13) corresponding to different depth layers, the delivery outlet of second water pump (12) is equipped with conveyer pipe (14) that are used for carrying zooplankton to fingerling cultivation net cage (1), control module (2) electric connection turbidity detection mechanism, second water pump (12).
7. The system for collecting and cultivating large-size fish fries in natural baits in the reservoir according to claim 6, wherein the control module (2) is a multi-line single-pass device, the turbidity detection mechanism comprises a light source (15) and a light sense switch (16) which are respectively arranged at two sides of the detection part (7), the light source (15) is connected with two ends of a power supply, the light sense switch (16) is connected with two ends of the power supply after being connected with a diode bridge circuit (17) in series, the other two ends of the diode bridge circuit (17) are connected with coils of a first relay (18), one end of the second water pump (12) is connected with one end of the power supply through the multi-line single-pass device, and the other end of the second water pump (12) is connected with the other end of the power supply through a contact of the first relay (18).
8. The system for collecting and cultivating the large-size fish fries according to the natural bait of the reservoir of claim 7, wherein the multi-line single-pass device comprises M control units (21) which are sequentially connected in series, the control units (21) comprise M live wires (22), a zero wire (23) and M-1 second relays (24), and the live wires (22) of the M control units (21) are correspondingly connected one by one; an Nth firing wire (22) of the Nth control unit (21) is connected with a direct current rectifier (25) in series, other M-1 firing wires (22) of the Nth control unit (21) are correspondingly connected with a normally closed contact of a second relay (24) in series, the direct current rectifier (25) supplies power to coils of the M-1 second relays (24), and each second water pump (12) is correspondingly connected with the firing wire of the first or M control unit (21).
9. The system for collecting and cultivating large-size fish fries in reservoir natural baits according to claim 7, characterized in that the light-sensitive switch (16) is a photoresistor, the detection part (7) is made of transparent material, the sectional area of the detection part (7) is smaller than that of the water collection part (8), the detection part (7) and the water collection part (8) are arranged up and down, and the water inlet pipe (10) and the water return pipe (11) are both close to the filter screen (9); the plurality of conveying pipes (14) are connected to the same collecting pot (19), the collecting pot (19) is connected with the fish seed cultivation net cage (1) through a single pipe (20), and the conveying pipes (14) are provided with one-way valves.
10. The system for collecting and cultivating large-sized fish fries according to the natural bait of the reservoir as claimed in claim 6, wherein the control module (2) is a single chip microcomputer or a PLC (programmable logic controller) or an industrial personal computer, and the turbidity detection mechanism is a turbidity meter or a correlation type photoelectric switch.
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| CN202210096278.8A CN114467810B (en) | 2022-01-26 | 2022-01-26 | Method and system for collecting and cultivating large-size fish fries by natural baits in reservoirs |
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