CN110973081A - Rapid sampling net for penaeus orientalis in water intake area of coastal nuclear power station and use method thereof - Google Patents
Rapid sampling net for penaeus orientalis in water intake area of coastal nuclear power station and use method thereof Download PDFInfo
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- CN110973081A CN110973081A CN201911074373.2A CN201911074373A CN110973081A CN 110973081 A CN110973081 A CN 110973081A CN 201911074373 A CN201911074373 A CN 201911074373A CN 110973081 A CN110973081 A CN 110973081A
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- net
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- netting
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K73/00—Drawn nets
- A01K73/02—Trawling nets
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K73/00—Drawn nets
- A01K73/02—Trawling nets
- A01K73/04—Devices for spreading or positioning, e.g. control thereof
Abstract
The invention discloses a rapid sampling net for freshwater shrimps in a water taking area of a coastal nuclear power station and a using method thereof. The invention can realize the rapid sampling of the crayfishes in the water intake area of the coastal power station, has simple structure, low cost and convenient operation, can operate in water areas with different substrates, and is particularly suitable for the rapid sampling of investigation and monitoring of the crayfishes in the water intake area of the coastal nuclear power station.
Description
Technical Field
The invention relates to a rapid sampling net for prawns in a water intake area of a coastal nuclear power station and a using method of the rapid sampling net for the prawns.
Background
The macrobrachium nipponensis is a large zooplankton in plankton groups, belongs to warm and tropical marine shrimps and has important economic value. Acetes chinensis is widely distributed in the Indian, Pacific and Atlantic ocean, as well as along the coast of China.
In recent years, the shrimp has a tendency to appear explosively in some offshore areas under the influence of global climate change. The explosive appearance of the Acetes chinensis can cause great threat to the cold source safety of the water taking area of the coastal nuclear power station. The nuclear power station generally adopts a net-opening intercepting mode to prevent the intrusion of the macrobrachium nipponensis, but the macrobrachium nipponensis generally drifts with water due to limited swimming capability of the macrobrachium nipponensis, so that the distribution and the change of the macrobrachium nipponensis in a water taking area of the nuclear power station have a lot of uncertainty. Meanwhile, the Acetes chinensis can generate a large amount of explosive aggregates under the influence of sudden changes of air temperature. Therefore, the method is used for investigating and monitoring the species, the quantity and the distribution of the macrobrachium nipponensis in the water intake area, timely mastering the dynamic change of the macrobrachium nipponensis, and has important significance for guaranteeing the safety of a cold source in the water intake area of the nuclear power station. Sampling of the shrimps is one of the important means for investigation and monitoring.
At present, the gross shrimp sample generally relies on traditional large-scale shrimp trawl to catch or use the net of nuclear power station self to go on passively, but because traditional shrimp trawl structure is complicated, complex operation, the sample area of intercepting net is limited for traditional shrimp trawl can't carry out quick sample to the gross shrimp, thereby has influenced survey, monitoring and the tracking of regional gross shrimp of intaking to the coastal nuclear power station.
Disclosure of Invention
The invention aims to provide a rapid sampling net for the macrobrachium nipponensis in the water intake area of the coastal nuclear power station, which has the advantages of simple structure, low cost and convenient operation and can rapidly sample the macrobrachium nipponensis.
The first object of the invention is achieved by the following technical measures: the utility model provides a coastal nuclear power station water intaking district mao shrimp fast sampling net which characterized in that: the trawl line comprises a trawl line, a cross line, a truss rod, a hanging line, a netting and a sunk chain, wherein one end of the trawl line is a free end and is used for being connected with a support rod fixed on a bow, the cross line is provided with a plurality of cross lines, one end of each cross line is gathered together and connected with the other end of the trawl line, the other end of each cross line is connected with the hanging line along a rod body of the truss rod, the hanging line is provided with a plurality of hanging lines, one end of each hanging line is connected with the rod body of the truss rod, the other end of each hanging line is connected with the sunk chain and then connected with the lower end of the netting, and the upper end of the netting is connected with the truss rod, so that the netting can form an arched pocket shape under the action of water flow.
When the marine macrobrachium nipponensis sampler is used, under the action of water flow and reverse dragging of a ship body, the straightening length of the net is greater than the length of the hanging net, so that the net forms an arched pocket shape to capture encountered macrobrachium nipponensis, and the rapid sampling of the macrobrachium nipponensis in a water taking area of a coastal power station is realized; moreover, the invention has simple structure, low cost and convenient operation, can work in water areas with different substrates, and is particularly suitable for fast sampling for investigation and monitoring of the macrobrachium nipponense in a water taking area of a coastal nuclear power station.
The net mainly comprises an auxiliary net connected to the truss rod and a main net connected with the auxiliary net, and the mesh size of the main net is smaller than that of the auxiliary net.
The rapid sampling net for the penaeus chinensis in the water taking area of the coastal nuclear power station also comprises an anti-friction net, and the upper end of the anti-friction net is connected to the lower end of the main netting. The anti-friction net plays a role in protecting the netting and avoids the netting from being damaged.
Preferably, the material of the draw line is polyethylene, the diameter is 11-20mm, and the length is 8-15 m; the cross lines are made of polyethylene, the diameter of the cross lines is 11-20mm, the length of the cross lines is 1-3m, and the number of the cross lines is 13-20; the sling lines are polyethylene ropes, the diameter of each sling line is 6-10mm, the length of each sling line is 1.2-2.0m, and the number of the sling lines is 20-30.
Preferably, the truss is made of bamboo rods, the length of the truss is 8-9m, the diameter of the truss is 30-50mm, and the weight of the truss is 2.5-4.0 kg.
Preferably, the auxiliary netting is made of polyethylene monofilaments, the diameter of the auxiliary netting is 0.6-1.0mm, the meshes of the auxiliary netting are diamond meshes, the mesh size is 30-40mm, the number of longitudinal meshes is 45-50 meshes, and the number of transverse meshes is 630-650 meshes; the main netting is made of polyethylene monofilaments, the diameter of the main netting is 0.12-0.20mm, the meshes of the main netting are square meshes, the size of the meshes is 3-6mm, the number of longitudinal meshes is 485-550 meshes, and the number of transverse meshes is 6300-6500 meshes; the anti-friction net is made of polyethylene, the thickness of the line is 10 multiplied by 3, the meshes of the anti-friction net are diamond meshes, the mesh size is 15-25mm, the number of longitudinal meshes is 43-50 meshes, and the number of transverse meshes is 1260-1500 meshes.
Preferably, the material of the sinking chain is iron, the length is 12-15m, and the weight is 10-20 kg.
The second purpose of the invention is to provide a use method of the rapid sampling net for the macrobrachium nipponensis in the water intake area of the coastal nuclear power station.
The second object of the invention is achieved by the following technical measures: a use method of the rapid sampling net for the penaeus orientalis in the water intake area of the coastal nuclear power station is characterized by comprising the following steps:
s1, adjusting the orientation of the bow of the ship to keep the direction of the bow consistent with the direction of water flow;
s2, backing the ship, namely, the running direction of the ship is opposite to the water flow direction;
s3, placing the rapid sampling net for the prawns in the water intake area of the coastal nuclear power station into water at the bow of the ship, and after the sampling net is fully expanded in the water, increasing the ship speed;
s4, the netting forms an arched pocket shape under the action of water flow and reverse dragging of the ship body, so that encountered penaeus chinensis is captured;
and S5, dragging the sampling net for a period of time, hauling the net, and pouring the shrimps out of the net clothes to finish the sampling of the shrimps.
Preferably, in the step S2, the ship speed is 1.0 to 2.0 kn.
Preferably, in the step S3, the ship speed is increased to 2.5 to 3 kn.
Preferably, in the step S5, the dragging time of the sampling net is 10 to 15 minutes.
Compared with the prior art, the invention has the following remarkable effects:
when the marine macrobrachium nipponensis sampler is used, under the action of water flow and reverse dragging of a ship body, the straightening length of the net is greater than the length of the hanging net, so that the net forms an arched pocket shape to capture encountered macrobrachium nipponensis, and the rapid sampling of the macrobrachium nipponensis in a water taking area of a coastal power station is realized; moreover, the sampling net has the advantages of simple structure, low cost and convenient operation, can operate in water areas with different substrates, and is particularly suitable for rapid sampling of investigation and monitoring of the macrobrachium nipponense in a water taking area of a coastal nuclear power station.
Drawings
The invention is described in further detail below with reference to the figures and the specific embodiments.
FIG. 1 is a schematic view of the overall structure of a sampling net according to the present invention;
FIG. 2 is a schematic representation of a sampling net of the present invention in use.
In the figure: 1-tracings; 2-cross; 3-a truss; 4-headings; 5-auxiliary netting; 6-main netting; 7-sinking the chain; 8-anti-friction net; 9-a ship; 10-stay bar.
Detailed Description
As shown in fig. 1 and 2, the rapid sampling net for the crayfishes in the water intake area of the coastal nuclear power station comprises a towline 1, a cross line 2, a truss rod 3, a sling 4, a net, a sinking chain 7 and an anti-friction net 8, wherein one end of the towline 1 is a free end and is used for being connected with a support rod 10 fixed on a bow, the cross line 2 is a plurality of ropes, one ends of the ropes are gathered together and connected with the other end of the towline 1, the other ends of the cross line 2 are respectively connected to the truss rod 3, and the connection points are distributed along the rod body of the truss rod 3. The hanging ropes 4 are multiple, one ends of the hanging ropes 4 are respectively connected with the trusses 3, and the connection points are distributed along the rod bodies of the trusses 3. The net mainly comprises an auxiliary net 5 and a main net 6 connected with the auxiliary net 5, and the mesh size of the main net 6 is smaller than that of the auxiliary net 5. The upper end of the auxiliary netting 5 is connected to the truss rod 3, the upper end of the anti-friction net 8 is connected with the lower end of the main netting 6, and the sunk chain 7 is connected with the other end of the hanging rope 4 and then connected to the connecting position of the main netting 6 and the anti-friction net 8. Because the main net and the auxiliary net are pulled out by the water flow and the ship body in the reverse direction, the overall straightening length of the main net and the auxiliary net is larger than the length of the hanging line 4, so that the main net and the auxiliary net form an arched pocket shape, and therefore encountered macrobrachium nipponensis is mainly captured in the main net 6.
In this example, the warp 1 is made of polyethylene, has a diameter of 11mm, a length of 12m, and a number of 1; the cross line 2 is made of polyethylene, the diameter is 11mm, the length is 2m, and the number is 13. The head line 4 is a polyethylene rope with the diameter of 6mm, the length of 1.2m and the number of 30. The truss 3 is made of bamboo, and has a length of 8m, a diameter of 50mm, and a weight of 3.0 kg. The sinking chain 7 is made of iron, has a length of 13m and a weight of 15 kg. The auxiliary netting 5 is made of polyethylene monofilaments, the diameter of the auxiliary netting 5 is 0.6mm, the meshes of the auxiliary netting 5 are diamond meshes, the mesh size is 30mm, the number of longitudinal meshes is 45 meshes, and the number of transverse meshes is 630 meshes; the main netting 6 is made of polyethylene monofilaments, the diameter of the main netting 6 is 0.12mm, the meshes of the main netting 6 are square meshes, the mesh size is 6mm, the number of longitudinal meshes is 485 meshes, and the number of transverse meshes is 6300 meshes; the anti-friction net 8 is made of polyethylene, the line thickness is 10 multiplied by 3, the meshes of the anti-friction net 8 are diamond meshes, the mesh size is 15mm, the number of longitudinal meshes is 43 meshes, and the number of transverse meshes is 1260 meshes.
Referring to fig. 2, the use method of the rapid sampling net for the freshwater shrimp in the coastal nuclear power plant water intake area comprises the following steps:
s1, adjusting the orientation of the bow of the ship 9 to be consistent with the water flow direction A;
s2, backing the ship, namely, the driving direction B of the ship 9 is opposite to the water flow direction A, and the ship speed is 1.5 kn; in other embodiments, the boat speed may be 1.0-2.0 kn.
S3, fixing a stay bar 10 at the bow of the ship, wherein the stay bar 10 is vertical to the ship body, the extension end of the stay bar 10 is fixed with a warp 1, a rapid sampling net for the penaeus chinensis in the water intake area of the coastal nuclear power station is placed in water, and after the sampling net is fully expanded in the water, the ship speed is increased to 2.5 kn; in other embodiments, the speed of the ship can be increased to 2.5-3 kn.
S4, the main net 6 and the auxiliary net 5 form an arched pocket shape under the action of water flow and reverse dragging of the ship body, so that encountered penaeus chinensis can be captured; the mesh size of the main netting 6 is 6mm, the number of longitudinal meshes is 485 meshes, and the number of transverse meshes is 6300 meshes; the mesh size of the sub-net 5 is 30mm, the number of the longitudinal meshes is 45 meshes, and the number of the transverse meshes is 630 meshes, so that the mesh size of the main net 6 is smaller and denser, and the macrobrachium nipponensis is mainly captured in the main net 6.
And S5, dragging the sampling net for 12 minutes, hauling the net, and pouring the freshwater shrimps out of the main net coat 6 to finish the sampling of the freshwater shrimps. In other embodiments, the time period for the sampling net to drag may be 10-15 minutes.
The diameter of the warp is 11-20mm, and the length is 8-15 m; the diameter of the cross line is 11-20mm, the length is 1-3m, and the number is 13-20; the diameter of the sling line is 6-10mm, the length is 1.2-2.0m, and the number is 20-30; the length of the truss rod is 8-9m, the diameter is 30-50mm, and the weight is 2.5-4.0 kg; the length of the sinking chain is 12-15m, and the weight is 10-20 kg; the diameter of the auxiliary netting is 0.6-1.0mm, the mesh size is 30-40mm, the number of longitudinal meshes is 45-50 meshes, and the number of transverse meshes is 630-650 meshes; the diameter of the main net is 0.12-0.20mm, the mesh size is 3-6mm, the number of longitudinal meshes is 485-550 meshes, and the number of transverse meshes is 6300-6500 meshes; the mesh size of the anti-friction net is 15-25mm, the number of longitudinal meshes is 43-50 meshes, and the number of transverse meshes is 1260-1500 meshes.
The embodiments of the present invention are not limited thereto, and according to the above-mentioned contents of the present invention, the present invention can be modified, substituted or changed in other various forms without departing from the basic technical idea of the present invention.
Claims (10)
1. The utility model provides a coastal nuclear power station water intaking district mao shrimp fast sampling net which characterized in that: the trawl line comprises a trawl line, a cross line, a truss rod, a hanging line, a netting and a sunk chain, wherein one end of the trawl line is a free end and is used for being connected with a support rod fixed on a bow, the cross line is provided with a plurality of cross lines, one end of each cross line is gathered together and connected with the other end of the trawl line, the other end of each cross line is connected with the hanging line along a rod body of the truss rod, the hanging line is provided with a plurality of hanging lines, one end of each hanging line is connected with the rod body of the truss rod, the other end of each hanging line is connected with the sunk chain and then connected with the lower end of the netting, and the upper end of the netting is connected with the truss rod, so that the netting can form an arched pocket shape under the action of water flow.
2. The rapid sampling net for the freshwater shrimp in the coastal nuclear power station water intake area of claim 1, which is characterized in that: the net mainly comprises an auxiliary net connected to the truss rod and a main net connected with the auxiliary net, and the mesh size of the main net is smaller than that of the auxiliary net.
3. The rapid sampling net for the freshwater shrimp in the coastal nuclear power station water intake area of claim 2, which is characterized in that: the rapid sampling net for the penaeus chinensis in the water taking area of the coastal nuclear power station further comprises an anti-friction net, and the upper end of the anti-friction net is connected to the lower end of the main netting.
4. The rapid sampling net for the freshwater shrimp in the coastal nuclear power station water intake area of claim 3, which is characterized in that: the warp is made of polyethylene, the diameter of the warp is 11-20mm, and the length of the warp is 8-15 m; the cross lines are made of polyethylene, the diameter of the cross lines is 11-20mm, the length of the cross lines is 1-3m, and the number of the cross lines is 13-20; the sling lines are polyethylene ropes, the diameter of each sling line is 6-10mm, the length of each sling line is 1.2-2.0m, and the number of the sling lines is 20-30.
5. The rapid sampling net for the freshwater shrimp in the coastal nuclear power station water intake area of claim 4, which is characterized in that: the truss is made of bamboo rods, the length of the truss is 8-9m, the diameter of the truss is 30-50mm, and the weight of the truss is 2.5-4.0 kg; the sinking chain is made of iron, the length of the sinking chain is 12-15m, and the weight of the sinking chain is 10-20 kg.
6. The rapid sampling net for the freshwater shrimp in the coastal nuclear power station water intake area of claim 5, which is characterized in that: the auxiliary netting is made of polyethylene monofilaments, the diameter of the auxiliary netting is 0.6-1.0mm, the meshes of the auxiliary netting are diamond meshes, the mesh size is 30-40mm, the number of longitudinal meshes is 45-50 meshes, and the number of transverse meshes is 630-650 meshes; the main netting is made of polyethylene monofilaments, the diameter of the main netting is 0.12-0.20mm, the meshes of the main netting are square meshes, the size of the meshes is 3-6mm, the number of longitudinal meshes is 485-550 meshes, and the number of transverse meshes is 6300-6500 meshes; the anti-friction net is made of polyethylene, the meshes of the anti-friction net are diamond meshes, the mesh size is 15-25mm, the number of longitudinal meshes is 43-50 meshes, and the number of transverse meshes is 1260-1500 meshes.
7. A use method of the rapid sampling net for the macrobrachium nipponensis in the water intake area of the coastal nuclear power station as claimed in any one of claims 1 to 6, is characterized by comprising the following steps:
s1, adjusting the orientation of the bow of the ship to keep the direction of the bow consistent with the direction of water flow;
s2, backing the ship, namely, the running direction of the ship is opposite to the water flow direction;
s3, placing the rapid sampling net for the prawns in the water intake area of the coastal nuclear power station into water at the bow of the ship, and after the sampling net is fully expanded in the water, increasing the ship speed;
s4, the netting forms an arched pocket shape under the action of water flow and reverse dragging of the ship body, so that encountered penaeus chinensis is captured;
and S5, dragging the sampling net for a period of time, hauling the net, and pouring the shrimps out of the net clothes to finish the sampling of the shrimps.
8. Use according to claim 7, characterized in that: in the step S2, the ship speed is 1.0-2.0 kn.
9. Use according to claim 8, characterized in that: in the step S3, the ship speed is increased to 2.5-3 kn.
10. Use according to claim 9, characterized in that: in the step S5, the dragging time of the sampling net is 10-15 minutes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911074373.2A CN110973081A (en) | 2019-11-06 | 2019-11-06 | Rapid sampling net for penaeus orientalis in water intake area of coastal nuclear power station and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911074373.2A CN110973081A (en) | 2019-11-06 | 2019-11-06 | Rapid sampling net for penaeus orientalis in water intake area of coastal nuclear power station and use method thereof |
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| CN110973081A true CN110973081A (en) | 2020-04-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111528186A (en) * | 2020-05-27 | 2020-08-14 | 中国水产科学研究院东海水产研究所 | Euphausia superba truss towing net lifting and submerging self-powered adjusting device |
| CN114698606A (en) * | 2022-04-18 | 2022-07-05 | 中国水产科学研究院东海水产研究所 | Euphausia superba trawl truss device convenient to adjust depth |
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| US8161676B1 (en) * | 2002-07-08 | 2012-04-24 | Albert Beach | Deep throw casting net |
| CN202566028U (en) * | 2012-04-19 | 2012-12-05 | 上海海洋大学 | Cololabis saira stick-held net structure |
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| US8161676B1 (en) * | 2002-07-08 | 2012-04-24 | Albert Beach | Deep throw casting net |
| CN2860090Y (en) * | 2006-01-11 | 2007-01-24 | 金丽新 | Overlapping mono-layer gill-net |
| CN101922145A (en) * | 2009-06-16 | 2010-12-22 | 中国水产科学研究院东海水产研究所 | Method for arresting entermorpha with air bag type arresting barrier |
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Application publication date: 20200410 |