CN201349448Y - Beam trawl net sheet fish and shrimp separation device - Google Patents
Beam trawl net sheet fish and shrimp separation device Download PDFInfo
- Publication number
- CN201349448Y CN201349448Y CNU2009200671157U CN200920067115U CN201349448Y CN 201349448 Y CN201349448 Y CN 201349448Y CN U2009200671157 U CNU2009200671157 U CN U2009200671157U CN 200920067115 U CN200920067115 U CN 200920067115U CN 201349448 Y CN201349448 Y CN 201349448Y
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- net
- capsule
- pole
- trawl
- back segment
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Abstract
Disclosed is a beam trawl net sheet fish and shrimp separation device; wherein, the beam trawl comprises a net cover, a net body and a net bag; the net cover is connected with the net body and the net body is connected with the closed net bag, the upper surface of the net body is net back and the lower surface of the net body is net belly, an inclined and downward separation net sheet which divides the net body into layers up and down is arranged in the net body, the separation net sheet is connected with a horizontal dense-mesh net sheet which divides the net bag into layers up and down. One end of the separation net sheet is connected with the net back close to the net opening and the other end is connected with the net body close to the net bag. The rear end of the net body close to the net bag is connected with a funnel net. The utility model realizes the separation fishing of shrimp and fish based on the behavior difference of shrimp and fish that shrimps are frightened to jump upwards and jump into the upper layer of the fishing net through the separation net; the fish cannot jump over the separation net sheet and enters the lower layer of the fishing net; thereby, the beam trawl net sheet fish and shrimp separation device has simple structure, convenient use, improves fishery harvesting output and the selectivity of fishery harvesting, protects economical fish and crab.
Description
Technical field
The utility model relates to a kind of pole trawl net sheet type fishes and shrimps separating device, belongs to the sea fishery technical field.
Background technology
A kind of important shrimping operating type of pole trawl all occupies critical role in the sea fishery of different continents.China is from eighties of last century end of the seventies, and shrimp resources and the fishing ground new along with the East Sea obtain exploitation gradually, and the operation of shrimping pole trawl is with its output height, and profitable characteristics have obtained fast development.The coastal pole trawl fishery output in entrance of Changjiang River and Jiangsu and Zhejiang Provinces was once once reaching 1/4 of China's marine fishing output, and pole trawl comprises network interface, body and net capsule, was the net back of the body above the body, was the net abdomen below the body; Many capsules pole trawl that pole trawl develops into the 8-10 capsule gradually by original 2-3 capsule as shown in Figure 1.China's coastal shrimping pole trawl fisheries development to promoting the fishery structural adjustment, promotes Ocean Fishery Development, and the pressure of fishing for that alleviates main economic fish has all played certain positive role.
Yet, when pole trawl fishery scale enlarges gradually, the not good characteristics of pole trawl fishing gear fishery harvesting performance embody gradually, along with going from strength to strength of fishery, the target shrimp resources fails gradually, the shrimping fishing ground is again the spawning ground or the feeding ground of economic fish, crab class usually in addition, and fishery is from object is gradually varied to fish, the shrimp crab is mixed caught in order mainly to catch with shrimps originally.In the actual job process, in order to catch individual less relatively shrimps, therefore the net keed order size of using is less, usually be 20-25mm, and the net capsule of this size of mesh has been caught the juvenile fish of a large amount of fish and other kind fishery harvesting, particularly economic fish to the selection poor-performing of main economic fish and crab class in the fishery harvesting process, for example the juvenile fish of little yellow croaker has caused serious negative effect for the main economic fish in coastal waters, crab resources.
The net sheet type separating device is a main separating device of realizing that trawlnet variety classes fishery harvesting is separated.For example 20th century 60, the seventies, Norway used in long volume shrimp (Pandalus borealis) trawl-net fishing that vertical separator panel and HH type separator panel realization fish are double to catch release; Britain in the eighties in 20th century in langoustine (Nephrops norvegicus) trawl-net fishing, utilize the layering trawlnet of horizontal subdivision net sheet design effectively to realize the fishery harvesting separation, on this research basis,
Et al. has has also designed and developed horizontal subdivision net sheet and has realized the separation of different cods in the fishing trawlnet of Norway, and Compas and Fonseca utilize and tilt to have realized separating of shrimps and fish with the separator panel that level combines in the shrimp trawl-net fishing.
On China's coastal waters shrimping pole trawl fishing gear, realize that by exploitation net sheet type separating device different types of fishery harvesting separates, for the transaction capabilities that improves fishing gear, improve targeted species fishery harvesting quality and realize that the selective fishing of different fishery harvesting kinds all has important meaning.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of pole trawl net sheet type fishes and shrimps separating device, to solve the existing existing many weak points of pole trawl.This utility model is applicable to shrimping.
Fish and shrimps have diverse to pole trawl: generally, the behavior of shrimps in netting gear is passive, generally, the shrimps individuality is being subjected to the netting gear stimulation, after for example contacting the netting gear infraclass, can shrink belly, spring vertically upward, stop the initiative behavior subsequently, passive sinking, shrimps do not possess the orientation ability of moving about in this process; And for most of fish, individuality enters netting gear and has certain capacity of orientation and swimming ability later on.
Therefore according to result of study and in conjunction with the design feature of East Sea shrimping pole trawl fishing gear.
The technical problem of the required solution of the utility model can be achieved through the following technical solutions:
A kind of pole trawl net sheet type fishes and shrimps separating device, pole trawl comprises square, body and net capsule, body is divided into two sections, comprising: body leading portion and body back segment; Being the net back of the body above the body, is the net abdomen below the body; Square is connected with the body leading portion, and the body leading portion is connected by the net capsule of body back segment separately with closure, it is characterized in that:
Be provided with one in the described body back segment body is divided into the separator panel of lower leaf, described separator panel connects a Dense mesh screen sheet with the layering of net capsule.
Direction under described separator panel is tilted to is arranged in the body back segment.
One end of described separator panel and net lean against the connecting portion of nearly body leading portion and body back segment, the connecting portion of the other end and body back segment and net capsule.
The size of mesh of described separator panel is that the etting of 70-120mm is made.
Described Dense mesh screen sheet is horizontally placed in the net capsule, and with lower leaf on the net capsule, the net capsule on upper strata is the shrimp capsule, and the net capsule of lower floor is the fish capsule.
The size of mesh of described Dense mesh screen sheet is that the etting of 10-20mm is made.
Described body back segment prevents that near the end connection one of net capsule fishery harvesting from entering the Criny that the net capsule withdraws from the net capsule later on, and the wide mouth of described Criny is connected with body back segment and separator panel end, and the slot of described Criny is opened in the net capsule.
The beneficial effects of the utility model:
The utility model is placed in pole trawl body part by the separator panel under is tilted to, with lower leaf on the body of pole trawl, separator panel connects the Dense mesh screen sheet, the Dense mesh screen sheet is lower leaf on the net capsule, utilizes shrimps to meet frightened upwards spring and passes through that separator panel enters the netting gear upper strata and fish can not be passed through the behavior difference that separator panel enters lower floor and realized the separation of shrimps and fish is fished for.
Compare the beneficial effects of the utility model with the separator panel of existing other types:
(1) adopted the more simple trapezoidal separator panel of structure, be convenient to draw materials;
(2) with lower leaf on the netting gear in order to fish for different fishery harvesting objects, help realizing different operation purposes, for example improve the fishery harvesting quality, utilize to amplify fish keed order size and reduce juvenile fish ratio etc.;
(3) utilize the Dense mesh screen sheet with lower leaf on the net capsule, helped the expansion of net capsule, kept net capsule performance.
(4) the body back segment connects Criny, and the slot of Criny is opened on the net capsule.Criny plays and prevents that fishery harvesting from entering the effect of withdrawing from the net capsule behind the net capsule again.
The utlity model has simple in structurely, easy to use, improve the transaction capabilities of pole trawl, improve selectivity, the advantage of protection economic fish and crab class fishery harvesting.
Description of drawings
Further specify the utility model below in conjunction with the drawings and specific embodiments.
Fig. 1 is the vertical view of existing many capsules pole trawl.
Fig. 2 is a partial schematic diagram of the present utility model.
Fig. 3 is a user mode schematic diagram of the present utility model.
Drawing explanation: square 1, body 2, body leading portion 23, body back segment 24, the net back of the body 21, net abdomen 22, net capsule 3, shrimp capsule 31, fish capsule 32, separator panel 4, Dense mesh screen sheet 5, Criny 6.
Embodiment
In order to make technological means of the present utility model, creation characteristic, to reach purpose and effect is easy to understand,, further set forth the utility model below in conjunction with concrete diagram.
A kind of pole trawl net sheet type fishes and shrimps separating device as Fig. 1, Fig. 2 and shown in Figure 3, comprises square 1, body 2 and net capsule 3.
Square 1 connects the body leading portion 23 of body 2, and body leading portion 23 connects body back segment 24 separately, and body back segment 24 connects closed net capsule 3.
Being the net back of the body 21 above the body 2, is net abdomen 22 below the body 2.Water (flow) direction is to flow from the direction of square 1 towards net capsule 3.
The technical parameter of table 1 pole trawl
| The position | N-meshes N | The taut length L of net sheet | Material MAT | Size of mesh 2a (a is the single bar size of separator panel) | T-meshes |
| Square | 60 | 2.7 | PE36tex3×5 | 45 | 3200 |
| Body leading portion I | 65 | 2.6 | PE36tex3×4 | 40 | 3200 |
| Body leading portion II | 60 | 2.2 | PE36tex3×4 | 36 | 3200 |
| Body back segment I | 60 | 1.9 | PE36tex3×4 | 32 | 400 |
| Body back segment II | 80 | 2.4 | PE36tex3×4 | 30 | 320 |
| Body back segment III | 80 | 2.3 | PE36tex3×4 | 28 | 230 |
| The net capsule | 80 | 1.9 | PE36tex3×5 | 24 | 150 |
Parameter is as shown in table 1, and square 1 adopts PE36tex3 * 5 materials to make, and the T-meshes of square 1 is 3200, and N-meshes is respectively 60.
Body 2 front and back are divided into two sections: body leading portion 23 and body back segment 24; Body 2 is divided into the net back of the body 21 and net abdomen 22 up and down.
Body leading portion 23 is divided into two sections, body leading portion I and body leading portion II, and T-meshes is 3200, N-meshes is respectively 65,60.
Body back segment 24 is divided into three sections, and body back segment I, body back segment II and body back segment III are made by etting I, the etting II, the etting III that adopt PE36tex3 * 4 materials respectively.Direction from square 1 to net capsule 3 connects successively by 3 successively, and big or small diminishing etting is made.Etting I is 400 near the T-meshes of square 1 direction; Etting II is 320 near the T-meshes of square 1 direction; Etting III is 230 near the T-meshes of square 1 direction; N-meshes is respectively 60,80,80.
Body back segment 24 is connected with net capsule 3, and net capsule 3 adopts the etting of PE36tex3 * 5 materials to make, and net keed clothing is 150 near the T-meshes of square 1 direction, and N-meshes is 80.The end of net capsule 3 is a drawline.
Be provided with one in the body back segment 24 body 2 is divided into the separator panel 4 of lower leaf, separator panel 4 connects a Dense mesh screen sheet 5 with 3 layerings of net capsule.
Direction under separator panel 5 is tilted to is arranged in the pole trawl body 2.One end of separator panel 5 is connected with the position of the net back of the body 21 near square 1, and the other end is connected with the position of body 2 near net capsule 3.The size of mesh of separator panel 4 is 70-120mm.
The making of separator panel 4: separator panel 4 is selected isosceles trapezoid net sheet for use, PE42tex3 * 5 of drawing materials, the mesh size of separator panel 4 is 70-120mm, decide on concrete operation situation,, then suitably amplify the size of mesh of separator panel 4 if the shrimps individuality is more in the operation process, otherwise, if shrimps fishery harvesting is less, and fish and crab class fishery harvesting are more, then suitably dwindle the size of mesh of separator panel 4.Separator panel 4 length should be consistent with pairing body 2 taut length; 2 trapezoidal edge lengths determine that according to the specification of body 2 according to experiment and marine the observation, the mesh of broadside is counted N '
1, narrow limit mesh count N '
2Comparatively reasonable calculation method is:
Wherein:
N
1And N
2The circumferential order number of 2 place's bodies 2 of stitching mutually with separator panel of expression respectively, circumferential order number equals 2 times of circumferential order number, N in the present embodiment
1Be 800 orders, N
2Be 300 orders;
A, a
1And a
2Represent separator panel 4 respectively, the net sheet mesh bar size of the 2 place's bodies that stitch mutually with separator panel 4;
E
T1And E
T2The horizontal hanging ratio of the net sheet of 2 place's bodies of stitching mutually with separator panel 4 of expression respectively, generally, E
T1Be 0.25-0.35, E
T2Be 0.2-0.25;
E '
T1And E '
T2The horizontal hanging ratio that got on net sheet broadside and narrow limit when separator panel 4 was installed in expression respectively, generally, E '
T1Get 0.50-0.55, E '
T2Get 0.40-0.50.
2 hypotenuses of separator panel 4 are then pruned with certain taper ratio, and the slope of cutting the ribbon at an opening ceremony calculates according to actual conditions.
The installation of separator panel 4: separator panel 4 is after cutting out reinforcing, and the broadside of trapezoidal separator panel 4 is sutured near the position of square 1 or is sutured in by single body 2 and is divided on the net back of the body 21 of many bodies 2 junctions, and the horizontal hanging ratio of the net back of the body 21 ettings is got E
T1, the horizontal hanging ratio of separator panel 4 is got E '
T1The two ends on separator panel 4 narrow limits are fixed on body 2 and net capsule 3 sutures, and are 2 parts up and down with aspect ratio 3: 2 with body 2 trailing edges, and rectangle Dense mesh screen sheet 5 is sewed up in the back on separator panel 4 narrow limits.
Dense mesh screen sheet 5 is horizontally placed in the net capsule 3, and with lower leaf on the net capsule 3, the net capsule 3 on upper strata is a shrimp capsule 31, and the net capsule 3 of lower floor is a fish capsule 32.To catch different fishery harvesting.
Dense mesh screen sheet 5 selection material are PE36tex3 * 4, and size of mesh is that the etting of 15mm is made.
Body back segment 24 is provided with Criny 6 with net capsule 3 junctions, and wide mouthful of Criny 6 is connected with separator panel 4 junctions with body back segment 24, and the slot of Criny 6 is opened in the net capsule 3.
More than show and described basic principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (7)
1, a kind of pole trawl net sheet type fishes and shrimps separating device, pole trawl comprises square, body and net capsule, body is divided into two sections, comprising: body leading portion and body back segment; Being the net back of the body above the body, is the net abdomen below the body; Square is connected with the body leading portion, and the body leading portion is connected by the net capsule of body back segment separately with closure, it is characterized in that:
Be provided with one in the described body back segment body is divided into the separator panel of lower leaf, described separator panel connects a Dense mesh screen sheet with the layering of net capsule.
2, pole trawl net sheet type fishes and shrimps separating device according to claim 1, it is characterized in that: the direction under described separator panel is tilted to is arranged in the body back segment.
3, pole trawl net sheet type fishes and shrimps separating device according to claim 2, it is characterized in that: an end of described separator panel and net lean against the connecting portion of nearly body leading portion and body back segment, the connecting portion of the other end and body back segment and net capsule.
4, pole trawl net sheet type fishes and shrimps separating device according to claim 3, it is characterized in that: the size of mesh of described separator panel is that the etting of 70-120mm is made.
5, pole trawl net sheet type fishes and shrimps separating device according to claim 1, it is characterized in that: described Dense mesh screen sheet is horizontally placed in the net capsule, and with lower leaf on the net capsule, the net capsule on upper strata is the shrimp capsule, and the net capsule of lower floor is the fish capsule.
6, pole trawl net sheet type fishes and shrimps separating device according to claim 5, it is characterized in that: the size of mesh of described Dense mesh screen sheet is that the etting of 10-20mm is made.
7, pole trawl net sheet type fishes and shrimps separating device according to claim 1, it is characterized in that: described body back segment prevents that near the end connection one of net capsule fishery harvesting from entering the Criny that the net capsule withdraws from the net capsule later on, the wide mouth of described Criny is connected with body back segment and separator panel end, and the slot of described Criny is opened in the net capsule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200671157U CN201349448Y (en) | 2009-01-19 | 2009-01-19 | Beam trawl net sheet fish and shrimp separation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200671157U CN201349448Y (en) | 2009-01-19 | 2009-01-19 | Beam trawl net sheet fish and shrimp separation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201349448Y true CN201349448Y (en) | 2009-11-25 |
Family
ID=41372843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200671157U Expired - Fee Related CN201349448Y (en) | 2009-01-19 | 2009-01-19 | Beam trawl net sheet fish and shrimp separation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201349448Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102100216A (en) * | 2010-12-24 | 2011-06-22 | 上海海洋大学 | Ground cage type fishing tool capable of selectively catching river crabs and shrimps or benthic fishes |
| CN102197791A (en) * | 2010-03-22 | 2011-09-28 | 中国水产科学研究院东海水产研究所 | Shrimp trawl net selection device with hexagonal sieve mesh structure |
| CN106305639A (en) * | 2016-11-21 | 2017-01-11 | 上海海洋大学 | Automatic control system of floater tractor |
| CN106614427A (en) * | 2016-12-29 | 2017-05-10 | 大连海洋大学 | Beam trawl capable of achieving shrimp and spiral-shell separation |
| CN110432233A (en) * | 2019-09-02 | 2019-11-12 | 浙江海洋大学 | A kind of elasticity aperture film Cod-ends of Trawl |
| CN111034689A (en) * | 2019-10-08 | 2020-04-21 | 浙江省海洋水产研究所 | Automatic classification structure of trawl |
| CN111053068A (en) * | 2019-10-08 | 2020-04-24 | 浙江省海洋水产研究所 | Fish and shrimp separating device for trawl net |
| CN114002686A (en) * | 2021-10-29 | 2022-02-01 | 中国科学院水生生物研究所 | Fish resource investigation method combining underwater acoustic detection and trawl sampling |
-
2009
- 2009-01-19 CN CNU2009200671157U patent/CN201349448Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102197791A (en) * | 2010-03-22 | 2011-09-28 | 中国水产科学研究院东海水产研究所 | Shrimp trawl net selection device with hexagonal sieve mesh structure |
| CN102100216A (en) * | 2010-12-24 | 2011-06-22 | 上海海洋大学 | Ground cage type fishing tool capable of selectively catching river crabs and shrimps or benthic fishes |
| CN102100216B (en) * | 2010-12-24 | 2012-07-04 | 上海海洋大学 | Ground cage type fishing tool capable of selectively catching river crabs and shrimps or benthic fishes |
| CN106305639A (en) * | 2016-11-21 | 2017-01-11 | 上海海洋大学 | Automatic control system of floater tractor |
| CN106614427A (en) * | 2016-12-29 | 2017-05-10 | 大连海洋大学 | Beam trawl capable of achieving shrimp and spiral-shell separation |
| CN110432233A (en) * | 2019-09-02 | 2019-11-12 | 浙江海洋大学 | A kind of elasticity aperture film Cod-ends of Trawl |
| CN110432233B (en) * | 2019-09-02 | 2021-06-08 | 浙江海洋大学 | Elastic small-hole film trawl net bag |
| CN111034689A (en) * | 2019-10-08 | 2020-04-21 | 浙江省海洋水产研究所 | Automatic classification structure of trawl |
| CN111053068A (en) * | 2019-10-08 | 2020-04-24 | 浙江省海洋水产研究所 | Fish and shrimp separating device for trawl net |
| CN111053068B (en) * | 2019-10-08 | 2021-09-03 | 浙江省海洋水产研究所 | Fish and shrimp separating device for trawl net |
| CN114002686A (en) * | 2021-10-29 | 2022-02-01 | 中国科学院水生生物研究所 | Fish resource investigation method combining underwater acoustic detection and trawl sampling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091125 Termination date: 20120119 |