CN103039408A - Floating trawl for investigating macroplankton in upper middle water body of inland large water surface - Google Patents
Floating trawl for investigating macroplankton in upper middle water body of inland large water surface Download PDFInfo
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- CN103039408A CN103039408A CN2012105946114A CN201210594611A CN103039408A CN 103039408 A CN103039408 A CN 103039408A CN 2012105946114 A CN2012105946114 A CN 2012105946114A CN 201210594611 A CN201210594611 A CN 201210594611A CN 103039408 A CN103039408 A CN 103039408A
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Abstract
The invention relates to a floating trawl for investigating macroplankton in an upper middle water body of an inland large water surface. The floating trawl comprises a trawl bag, trawl lines, corks, sinkers and support rods which are tie up, wherein the trawl bag comprises a trawl body, a packing trawl and wing trawls, the trawl lines include force lines, an upper line, a lower line, a cork line, a sinker line and fork lines, a radial cross section of the trawl bag gradually shrinks from the front to the rear, a larger opening end of the trawl body is connected with the wing trawls, the smaller opening end of the trawl body is connected with the packing trawl, an outlet is arranged at the rear end of the packing trawl, and a tying rope is arranged at the outlet of the packing trawl. The floating trawl has the advantage that a floating trawl with operating water depth larger than 2.00m is provided for specially investigating the macroplankton in the upper middle water body of the inland large water surface, is mainly used for investigating and sampling work of biological larvae like basic production, plankton, fish, shrimps and crabs on the inland large water surface, and fills the blank of the biological investigation field for the macroplankton in the upper middle water body of the inland large water surface.
Description
Technical field
The invention belongs to the landlocked flood thing investigation field of looking unfamiliar, particularly the large water surface in a kind of inland water body macroplankton investigation floating trawl at the middle and upper levels.
Background technology
At present, the large water surface upper water body in the inland, particularly at the landlocked large water surface of operating water depth more than 2.00m, in order to understand the biological situation of water body, the large water surface of scientific development often relates to the investigation sampling operation to biological young such as plankton, fish shrimp crabs.In the investigation sampling operation, need to use different investigation and sampling nets, generally with the sampling of lucite hydrophore, cladocera, copepoda are used the phytoplankton net filtration such as phytoplankton.But prior art is the professional investigation trawlnet of landlocked large water surface macroplankton not.Although the sea fishery catching net of " the double boat surface layer has wing list capsule trawlnet " is arranged, but can not be used for the landlocked large water surface, and it is not digital as the basic fundamental of plankton netting gear, can't make, because above-mentioned trawlnet neither one is concrete, rational, mutual corresponding master data of coincideing, in real work and making, do not have operability and repeatability.
Summary of the invention
The invention provides a kind of scientific research investigation floating trawl that the landlocked large water surface carries out at the middle and upper levels water body macroplankton investigation sampling that aims at, is vertically to be sewed up through cutting by the bolting silk cloth (claim again silk screen, be commonly called as screen cloth) that warp loom is made into to form.
Investigation floating trawl of the present invention is designed to the double boat surface laminar wing list capsule type trawlnet, because investigation floating trawl principal dimensions is less, can two ships sculling or remove oar tows, and can also tow with small diesel engine Power Vessel low speed.Investigation floating trawl of the present invention all by the screen cloth screen cloth cutting stitching of polyethylene (PE) monofilament through compiling, is joined the corresponding head rope and float again, sinker is rolled and formed.The hat that the intensity of polyethylene (PE) fiber and wearability occupy synthetic fibers, the fracture strength of its high-tenacity fibre reaches 6-9g/D.Its regain only is 4.0-4.5%, and its elasticity and flexibility are all fine under dry and dampness.Polyethylene (PE) fiber is lighter than water in addition, can naturally float in the water.The price of polyethylene (PE) fiber is minimum in synthetic fibers.
The headline of investigation floating trawl of the present invention and headline all adopt polyethylene (PE) fiber stranded rope; Infraclass and ground rope all adopt terylene (PES) fiber stranded rope.Because polyethylene (PE) fiber is lighter than water, and terylene (PES) fiber is heavier than water, and both intensity is very nearly the same.
Investigation floating trawl of the present invention is selected the small-sized foamed plastics spherical float of marine products, diameter 83.0mm, 36; Select 16 of lead pipe shape sinkers, each 250g is heavy.
Investigation floating trawl of the present invention need with two of struts, can be made of common steel tube or glass reinforced plastic pipe support high altitude 2.00m, diameter 50.0mm.
Beneficial effect of the present invention is, provide the landlocked large water surface of a kind of operating water depth more than 2.00m at the middle and upper levels the water body macroplankton investigate special-purpose floating trawl, be mainly used in the investigation sampling operation of the biological young such as basic productivity, plankton, fish shrimp crab of the landlocked large water surface, it is blank to have filled up this area.
The present invention is further described below in conjunction with accompanying drawing:
Description of drawings
Fig. 1, be the structural representation of investigation floating trawl of the present invention;
Fig. 2, be the expansion schematic diagram of the mesh bag of investigation floating trawl of the present invention;
Among the figure, the left side of axis is the expansion schematic diagram of upper wing lattice, back of the body net, and the right side is the expansion schematic diagram of lower wing lattice, belly.
Fig. 3, be the upper wing lattice cutting figure of embodiment 1;
Dotted line is shear line among the figure, and a that namely cuts from the left side partly is sewn into the right side;
Fig. 4, be the lower wing lattice cutting figure of embodiment 1;
Dotted line is shear line among the figure, and the b that namely cuts from the left side partly is sewn into the right side;
Fig. 5, be the belly limit net cutting figure of embodiment 1;
Dotted line is shear line among the figure;
Fig. 6, be stenogastry net and the long belly cutting figure of embodiment 1;
Dotted line is shear line among the figure;
Fig. 7, be sheet cutting figure in sheet and the back of the body net in the belly of embodiment 1;
Dotted line is shear line among the figure, and the c that namely cuts from the lower right corner partly is sewn into the upper right side;
Fig. 8, be long back of the body net and short back of the body net (back of the body selvage net) the cutting figure of embodiment 1;
Dotted line is shear line among the figure.
Embodiment
The large water surface in a kind of inland as shown in Figure 1 is water body macroplankton investigation floating trawl 11 at the middle and upper levels, comprise that mesh bag 12, the head rope, float 13, sinker, strut 14 roll and form, the head rope comprises manrope 15, headline 16, infraclass 17, headline, ground rope, fork guiding principle 18, the radial section of mesh bag 12 dwindles from front to back gradually, be front wide and rear narrow mesh bag 12, mesh bag 12 is comprised of body 19, keed 20, wing lattice 21.The large end of the opening of body 19 is connected with wing lattice 21, and the opening small end of body 19 is connected with keed 20, and keed 20 rear ends arrange outlet, and the exit arranges keed tying rope 22.Headline 16 and headline all adopt the polyethylene fibre stranded rope; Infraclass 17 and ground rope all adopt the polyster fibre stranded rope; Mesh bag 12 is all sewed up by the screen cloth screen cloth cutting of polyethylene monofilament through compiling.Float 13 is that small-sized foamed plastics is spherical, diameter 83.0mm, totally 36; Sinker is lead pipe, totally 16, and each heavy 250g.Strut 14 is two common steel tubes or glass reinforced plastic pipe, strut 14 height 2.00m, diameter 50.0mm.
By shown in Figure 2, wing lattice 21 comprises wing lattice 1 and lower wing lattice 2, and body 19 comprises back of the body net and belly;
Back of the body net comprises sheet 7 in 1 rectangular back of the body net, two long limits of sheet 7 are sewed together with 2 rectangular trapezoidal long long bases of carrying on the back net 8 respectively in the back of the body net, the short base of 2 lengths of a film back ofs the body net 8 is sewed together with the long base of the short back of the body net 9 of 2 right-angled trapezium respectively, the long back of the body net 8 of every side and the long right-angle side of carrying on the back net 9 respectively with 2 of parallelogram upward a minor face of wing lattices 1 be sewed together;
Belly comprises sheet 6 in 1 rectangular belly, two of sheet 6 long limits are sewed together with the long base of 2 rectangular trapezoidal long bellies 5 respectively in the belly, the short base of 2 length of a film bellies 5 is sewed together with the long base of the stenogastry net 4 of 2 right-angled trapezium respectively, the long right-angle side of the short base of stenogastry net 4 and rectangular leg-of-mutton limit net 3 is sewed together, stenogastry net 4 right-angle sides of every side and limit net 3 short right-angle sides respectively with a side seam of 2 lower wing lattices 2 of parallelogram built in.
Present embodiment is cutting and the sewing method of the net sheet of embodiment 1, as shown in Figure 3, with 2 single width wide be 1.00m, the 2 order screen cloth tailors of long 6.16m become 2 upper wing lattices 1; As shown in Figure 4, with 2 single width wide be 1.00m, the 2 order screen cloth tailors of long 4.20m become 2 lower wing lattices 2; As shown in Figure 5, with 1 single width wide be 1.00m, the 5 order screen cloths of long 1.66m are cut into leg-of-mutton limit, belly left and right sides net 3; As shown in Figure 6, with 2 single width wide be 1.00m, the 5 order screen cloths of long 8.32m are cut into stenogastry net 4, long belly 5 each 2; As shown in Figure 7, with 1 single width wide be 1.00m, the 5 order screen cloth tailors of long 7.50m become in the belly sheet 7 in the sheet 6 and back of the body net; As shown in Figure 8, with 2 single width wide be 1.00m, the 5 order screen cloths of long 5.00m are cut into long back of the body net 8, short back of the body net 9 each 2.After the cutting of net sheet, with electric iron the braided wire head of rabbet is carried out heat seal, loose to prevent out.Then according to expanded view, use the netting twine of net pin and PE42tex2 * 3 with up and down two the side seams jail of left and right sides wing lattice, the side of other each several part net sheets and front and back finally become 1 front wide and rear narrow mesh bag with same method seam jail.
Embodiment 3
Assemble method for the netting gear of embodiment 1:
(1) the butting step of gang rope:
Behind the screen cloth parcel of headline 16, infraclass 17 usefulness corresponding sides, carry out blind stitching with net pin and PE42tex2 * 3 netting twines, the head rope and net sheet are fastened, behind every blind stitching 10.0cm, fasten with clove hitch; The front end of 2 manropes 15 is connected with the wing lattice 21 rear break places of infraclass 17 with the method for inserting becket bridle and fastens with netting twine; Then manrope 15 parallel bundles backward with the axis of netting are attached under the belly, every interval 10.0cm pricks wire turn one, when pricking behind side, continues ligation along side, until the end of keed 20; The upper and lower side of wing lattice 21 end guiding principles binds and fastens with headline 16, infraclass 17 respectively, and the perpendicular guiding principle of screen cloth parcel wing tip with upper wing lattice 1, lower wing lattice 2 front ends then fastens with netting twine; Be attached on the manrope 15 of a side with the netting twine bundle at the end of keed 20 ends with keed tying rope 22;
(2) installation step of float 13, sinker
Respectively headline and ground rope are passed whole float 13 and sinker; Then headline and headline 16 are closed up, both sides wing lattice 21 is raised to the higher plane of principle and is respectively pricked attached 15 floats, and its spacing is 0.44m; Network interface is raised to the higher plane of principle and is pricked attached 6 floats 13, and its spacing is 0.42m; Ground rope and infraclass 17 are closed up, and wing lattice 21 infraclasses 17 in both sides are respectively pricked 5 sinkers, and its spacing is 1.05m; Network interface infraclass 17 is pricked attached 6 sinkers, and its spacing is 0.86m;
(3) Connection Step of strut
With the upper and lower side of two struts 14, fasten with headline 16, the infraclass 17 of left and right sides wing lattice 21 respectively before the operation; With about fork guiding principle 18 also fasten with support 14 upper and lower side.
Be the concrete investigation job step of the biological survey floating trawl of embodiment 1, comprise:
1, operation boats and ships
Because this investigation floating trawl yardstick is less, but all operations of manpower sampan and motor-driven canoe, but need with two identical ship operations.Wherein one for putting the net boat band net boat of holding concurrently, and another is the band net boat.
2, put net
At first tie keed tying rope 22, in then keed 20 being aborted, move ahead at a slow speed, the gradually entry of investigation floating trawl.After strut 14 entry, give the band net boat with an end yoke guiding principle 18, two ships will drag guiding principle and tie up to respectively on the fork guiding principle 18, and keep respectively emitting and draging about 50 meters of guiding principles about spacing 30.00m, and the speed of towing is controlled at about per minute 30.00-50.00m.
3, hauling
(or depending on the circumstances or the needs of the situation) both manually haulings after towing 1.0-1.5 hour are pulled out to receive and are draged guiding principle, collect successively strut 14, wing lattice 21, body 19, keed 20.Untie keed tying rope 22 and pour out the biological sample of collection, deliver the investigator.Then tie keed tying rope 22, prepare to put the net operation next time.
The above embodiment only is that preferred embodiment of the present invention is described; be not that scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; various distortion and improvement that those of ordinary skills make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (10)
1. the large water surface in inland water body macroplankton investigation floating trawl (11) at the middle and upper levels, comprise mesh bag (12), the head rope, float (13), sinker, strut (14) is rolled and is formed, described mesh bag (12) comprises body (19), keed (20), wing lattice (21), the described head rope comprises manrope (15), raise to the higher plane of principle (16), infraclass (17), headline, ground rope, fork guiding principle (18), it is characterized in that, the radial section of described mesh bag (12) dwindles from front to back gradually, the large end of opening of described body (19) is connected with wing lattice (21), the opening small end of body (19) is connected with keed (20), described keed (20) rear end arranges outlet, and described exit arranges keed tying rope (22).
2. investigation floating trawl as claimed in claim 1 is characterized in that, described headline (16) and headline all adopt the polyethylene fibre stranded rope; Described infraclass (17) and ground rope all adopt the polyster fibre stranded rope; Described mesh bag (12) is all sewed up by the screen cloth screen cloth cutting of polyethylene monofilament through compiling.
3. investigation floating trawl as claimed in claim 1 is characterized in that, described float (13) is that small-sized foamed plastics is spherical, diameter 83.0mm, totally 36; Described sinker is lead pipe, totally 16, and each heavy 250g.
4. investigation floating trawl as claimed in claim 1 is characterized in that, described strut (14) is two common steel tubes or glass reinforced plastic pipe, support high altitude 2.00m, diameter 50.0mm.
5. investigation floating trawl as claimed in claim 1 is characterized in that, described wing lattice (21) comprises wing lattice (1) and lower wing lattice (2), and described body (19) comprises back of the body net and belly;
Described back of the body net comprises sheet (7) in 1 rectangular back of the body net, two long limits of sheet (7) are sewed together with 2 rectangular trapezoidal long long bases of carrying on the back net (8) respectively in the back of the body net, the short base of 2 lengths of a film back ofs the body nets (8) is sewed together with the long base of the short back of the body net (9) of 2 right-angled trapezium respectively, the long back of the body net (8) of every side and the long right-angle side of carrying on the back net (9) respectively with 2 of parallelogram upward a minor face of wing lattices (1) be sewed together;
Described belly comprises sheet (6) in 1 rectangular belly, two long limits of sheet in the belly (6) are sewed together with the long base of 2 rectangular trapezoidal long bellies (5) respectively, the short base of 2 length of a film bellies (5) is sewed together with the long base of the stenogastry net (4) of 2 right-angled trapezium respectively, the long right-angle side of the short base of stenogastry net (4) and rectangular leg-of-mutton limit net (3) is sewed together, the short right-angle side of stenogastry net (4) right-angle side of every side and limit net (3) respectively with a side seam of 2 lower wing lattices (2) of parallelogram built in.
6. investigation floating trawl as claimed in claim 5 is characterized in that, 2 single width are wide to become 2 described upper wing lattices (1) for the 2 order screen cloth tailors of 1.00m, long 6.16m; 2 single width are wide to be 1.00m, and the 2 order screen cloth tailors of long 4.20m become 2 described lower wing lattices (2); 1 single width is wide to be 1.00m, and the 5 order screen cloths of long 1.66m are cut into leg-of-mutton described limit, left and right sides net (3); 2 single width are wide to be 1.00m, and the 5 order screen cloths of long 8.32m are cut into described stenogastry net (4) and described long belly (5); 1 single width is wide to be 1.00m, and the 5 order screen cloth tailors of long 7.50m become sheet (7) in sheet in the described belly (6) and the described back of the body net; 2 single width are wide to be 1.00m, and the 5 order screen cloths of long 5.00m are cut into described long back of the body net (8) and described short back of the body net (9).
7. investigation floating trawl as claimed in claim 6 is characterized in that, after the described screen cloth cutting, with electric iron the braided wire head of rabbet is carried out heat seal.
8. investigation floating trawl as claimed in claim 6 is characterized in that, and is with the netting twine of net pin and PE42tex2 * 3 that each net seam is firm.
9. the assemble method of an investigation floating trawl claimed in claim 6 comprises the butting step of gang rope, the installation step of sinker, the Connection Step of strut, it is characterized in that the assembling of described investigation floating trawl comprises the steps:
The butting step of described gang rope comprises:
Behind the screen cloth parcel of raise to the higher plane of principle (16), infraclass (17) being used corresponding sides, carry out blind stitching with net pin and PE42tex2 * 3 netting twines, the head rope and net sheet are fastened, behind every blind stitching 10.0cm, fasten with clove hitch; The method of the front end usefulness of 2 manropes (15) being inserted becket bridle is connected and fastens with netting twine in the break place afterwards with the wing lattice (21) of infraclass (17); Then parallel the bundle backward with the axis of netting of manrope (15) is attached under the belly, every interval 10.0cm pricks wire turn one, when pricking behind side, continues ligation along side, until the end of keed (20); The upper and lower side of wing lattice (21) end guiding principle binds and fastens with headline (16), infraclass (17) respectively, and the perpendicular guiding principle of screen cloth parcel wing tip with upper wing lattice (1), lower wing lattice (2) front end then fastens with netting twine; Be attached on the manrope (15) of a side with the netting twine bundle at the terminal end with keed tying rope (22) of keed (20);
The installation step of described float (13), sinker comprises:
Respectively headline and ground rope are passed whole float (13) and sinker; Then headline and headline (16) are closed up, both sides wing lattice (21) is raised to the higher plane of principle and is respectively pricked attached 15 floats, and its spacing is 0.44m; Network interface is raised to the higher plane of principle and is pricked attached 6 floats (13), and its spacing is 0.42m; Ground rope and infraclass (17) are closed up, and both sides wing lattice (21) infraclass (17) is respectively pricked 5 sinkers, and its spacing is 1.05m; Network interface infraclass (17) is pricked attached 6 sinkers, and its spacing is 0.86m;
The Connection Step of described strut comprises:
With the upper and lower side of two struts (14), fasten with headline (16), the infraclass (17) of left and right sides wing lattice (21) respectively before the operation; With about pitch guiding principle (18) and also fasten with the upper and lower side of strut (14).
10. the method that tows of investigation floating trawl as claimed in claim 1 is characterized in that, slurry tows described method or small diesel engine Power Vessel low speed tows described investigation floating trawl for the two ships of employing are sculled, removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210594611.4A CN103039408B (en) | 2012-12-31 | 2012-12-31 | Floating trawl for investigating macroplankton in upper middle water body of inland large water surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210594611.4A CN103039408B (en) | 2012-12-31 | 2012-12-31 | Floating trawl for investigating macroplankton in upper middle water body of inland large water surface |
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| Publication Number | Publication Date |
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| CN103039408A true CN103039408A (en) | 2013-04-17 |
| CN103039408B CN103039408B (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210594611.4A Expired - Fee Related CN103039408B (en) | 2012-12-31 | 2012-12-31 | Floating trawl for investigating macroplankton in upper middle water body of inland large water surface |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103636574A (en) * | 2013-11-27 | 2014-03-19 | 太仓仕禾线网制造有限公司 | Clamp type trawl net |
| CN105076071A (en) * | 2014-05-13 | 2015-11-25 | 河北省海洋与水产科学研究院 | Offshore double-shop single-bag trawl with surface layer having wings for large jellyfish |
| CN105900946A (en) * | 2016-06-13 | 2016-08-31 | 中国水产科学研究院东海水产研究所 | Single-vessel euphausia superb trawl structure |
| CN106804544A (en) * | 2016-12-26 | 2017-06-09 | 浙江海洋大学 | A kind of trawlnet of PA monofilament mesh sheet structure |
| CN106922634A (en) * | 2017-04-11 | 2017-07-07 | 中国水产科学研究院东海水产研究所 | A kind of abyssal benthos sampling network |
| CN109392853A (en) * | 2018-11-19 | 2019-03-01 | 中国科学院南京地理与湖泊研究所 | Automate fish electric fishing science investigation apparatus |
| CN109774870A (en) * | 2019-01-29 | 2019-05-21 | 浙江省海洋水产研究所 | A kind of structure and method using unmanned boat control trawlnet folding |
| CN109964885A (en) * | 2019-04-30 | 2019-07-05 | 中国水产科学研究院东海水产研究所 | Modularization assemble trawlnet |
| CN110476904A (en) * | 2019-09-30 | 2019-11-22 | 浙江海洋大学 | A kind of air foil shape trawl board |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103636574A (en) * | 2013-11-27 | 2014-03-19 | 太仓仕禾线网制造有限公司 | Clamp type trawl net |
| CN105076071A (en) * | 2014-05-13 | 2015-11-25 | 河北省海洋与水产科学研究院 | Offshore double-shop single-bag trawl with surface layer having wings for large jellyfish |
| CN105900946A (en) * | 2016-06-13 | 2016-08-31 | 中国水产科学研究院东海水产研究所 | Single-vessel euphausia superb trawl structure |
| CN105900946B (en) * | 2016-06-13 | 2018-10-02 | 中国水产科学研究院东海水产研究所 | A kind of list ship krill trawlnet structure |
| CN106804544A (en) * | 2016-12-26 | 2017-06-09 | 浙江海洋大学 | A kind of trawlnet of PA monofilament mesh sheet structure |
| CN106922634A (en) * | 2017-04-11 | 2017-07-07 | 中国水产科学研究院东海水产研究所 | A kind of abyssal benthos sampling network |
| CN109392853A (en) * | 2018-11-19 | 2019-03-01 | 中国科学院南京地理与湖泊研究所 | Automate fish electric fishing science investigation apparatus |
| CN109774870A (en) * | 2019-01-29 | 2019-05-21 | 浙江省海洋水产研究所 | A kind of structure and method using unmanned boat control trawlnet folding |
| CN109964885A (en) * | 2019-04-30 | 2019-07-05 | 中国水产科学研究院东海水产研究所 | Modularization assemble trawlnet |
| CN110476904A (en) * | 2019-09-30 | 2019-11-22 | 浙江海洋大学 | A kind of air foil shape trawl board |
| CN110476904B (en) * | 2019-09-30 | 2021-08-10 | 浙江海洋大学 | Wing-shaped trawl board |
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| CN103039408B (en) | 2014-09-17 |
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