CN103039407B - One-boat beam haul-bag single-sac bottom trawl for investigating and sampling marine demersal creatures - Google Patents
One-boat beam haul-bag single-sac bottom trawl for investigating and sampling marine demersal creatures Download PDFInfo
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- CN103039407B CN103039407B CN201210591771.3A CN201210591771A CN103039407B CN 103039407 B CN103039407 B CN 103039407B CN 201210591771 A CN201210591771 A CN 201210591771A CN 103039407 B CN103039407 B CN 103039407B
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- 238000005070 sampling Methods 0.000 title claims abstract description 32
- 210000001015 abdomen Anatomy 0.000 claims description 72
- 238000011835 investigation Methods 0.000 claims description 36
- 230000008859 change Effects 0.000 claims description 11
- 210000001364 upper extremity Anatomy 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 241000282887 Suidae Species 0.000 claims description 2
- 238000000034 method Methods 0.000 description 9
- 238000009954 braiding Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 241000238557 Decapoda Species 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241000238366 Cephalopoda Species 0.000 description 1
- 241000238371 Sepiidae Species 0.000 description 1
- 238000009360 aquaculture Methods 0.000 description 1
- 244000144974 aquaculture Species 0.000 description 1
- 239000012472 biological sample Substances 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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- 230000009897 systematic effect Effects 0.000 description 1
Abstract
The invention relates to towing net, in particular to a one-boat beam haul-bag single-sac bottom trawl for investigating and sampling marine demersal creatures, and aims to provide a one-boat beam haul-bag single-sac bottom trawl for investigating and sampling marine demersal creatures. The trawl is stable in opening width and easy for pouring captures. The one-boat beam haul-bag single-sac bottom trawl for investigating and sampling marine demersal creatures comprises a warp, an outer cross rope, inner cross ropes, a beam, sinkers, a head, a body and a sack. The warp is connected with the inner cross ropes through the outer cross rope. The inner cross ropes are fixedly connected to eye rings on left and right sides of the beam. The top of an opening of the head is fixedly connected to the beam. The sinkers are fixedly connected to the bottom of the opening of the head. The section of the body gradually shrinks from front to rear. The opening large end of the body is connected with the head. The opening small end of the body is connected with the sack. A sample exit is arranged at the rear end of the sack, and a sack tying cord is disposed at the sample exit.
Description
Technical field
The invention belongs to marine organisms investigation field, particularly a kind of ocean stratobios investigation sampling trawlnet.
Background technology
Stratobios investigation in ocean is the important component part of Marine Sciences basic comprehensive investigation, and annual China all will carry out routine investigation work in each sea area, and in the scientific investigation in the South Pole, the arctic and ocean, stratobios investigation in ocean is also absolutely necessary content.At present, the stratobios investigation carried out in polar region and ocean adopts single hull bottom laminar to have wing list bladder type trawlnet (as Fig. 1), by being provided with the oceanographic vessel of stern chute or large-scale stern ramp trawler operation.China's immediate offshore area stratobios investigation adopts two hull bottom laminar to have wing list bladder type trawlnet (as Fig. 2) or trawlnet (as Fig. 3) operation of single hull bottom laminar boom type.These three kinds of trawlnets are business fishing net originally, to the requirement of Yu Haiyang stratobios investigation operation, respectively there is excellent, shortcoming.Single hull bottom laminar has wing list bladder type trawlnet to have and can actively chase nekton and benthon, initiative and flexible, job area is wide, catching rate is high, sampling is easy to advantage, but its network interface is the horizontal component produced by water impact by two towed web plates to be expanded, and current mainly affect by towing speed, and therefore the expansion width of network interface is not easily stablized.Two hull bottom laminar has wing list bladder type trawlnet to have equally and can actively chase nekton and benthon, comparatively initiative and flexible, job area is wider, catching rate is higher, sample easier advantage, but its network interface be by two ships tow time spacing decide, therefore network interface width is also unstable, meanwhile, two ship tows operation and adds contact communication and the tired standard of coordinating actions each other.Single hull bottom laminar boom type trawlnet is traditional Nearshore Shallow Sea operation netting gear, its advantage is network interface width is fix expansion by ligation at the boom that network interface is exaggerated, can remain unchanged in operation process, moreover, top has row to be folded to Pig (being commonly called as lace curtaining) in mesh bag in this netting gear network interface, when entering the spring in net comparatively strong (as prawn) and velocity of recession comparatively fast (as cuttlefish, squid) necton network after, during for being run away rearwardly and upwardly by spring or quick regression, but dropped in Pig, improve the accuracy of sampling, but this netting gear does not have the net capsule of after-opening, therefore it is very inconvenient when getting catches.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of network interface width and stablizes, effectively can prevent the strong and regression biological escape fast of the spring that networks, and then raising sampling accuracy, simultaneously easily get catches, the stratobios investigation of single hull bottom laminar boom Pig list bladder type ocean to sample trawlnet.The present invention is that ocean, applicant Hebei province and aquatic science research institute are bearing national science and technology supporting plan problem (2010BAC68B03), namely in " typical seawater aquaculture district ecotope recovery technique and demonstration ", realize through creationary effort, concrete technical scheme is as follows.
List hull bottom laminar boom Pig list bladder type ocean of the present invention stratobios investigation sampling trawlnet, comprise and drag guiding principle, outer fork guiding principle, interior fork guiding principle, boom, sinker, net head, body and keed, the described guiding principle that drags is connected with interior fork guiding principle by outer fork guiding principle, described interior fork guiding principle is fixedly connected on the eye thimble of the boom left and right sides, the upper opening portion of described net head is fixedly connected on boom, described sinker is fixedly connected on net head lower opening portion, the cross section of described body is oval, and reduce gradually from front to back, the large end of opening of body is connected with net head, the opening small end of body is connected with keed, described keed rear end arranges outlet, described exit arranges keed tying rope, be used for tightening keed outlet.
List hull bottom laminar boom Pig list bladder type ocean of the present invention stratobios investigation sampling trawlnet, wherein said net head comprises the back of the body cover net of rectangle, the belly of rectangle and the two panels triangulation network; Described back of the body cover net is arranged on the top of belly, is provided with and carries on the back lid hoddy between described back of the body cover net and boom; The front side edge of described belly is provided with ventral margin net, the long base of the described two panels triangulation network is connected with the limit, the left and right sides of carrying on the back lid hoddy with the front portion on back of the body limit, the cover net left and right sides respectively, and the rear hypotenuse of the two panels triangulation network is connected with the limit, the left and right sides of ventral margin net with the front portion on limit, the belly left and right sides respectively; The rear portion on limit, the described back of the body cover net left and right sides is connected with the rear portion on limit, the belly left and right sides; Described sinker string is on ground rope, and fixing ligation is on the lower edge guiding principle of ventral margin net; Between the lower edge guiding principle of described ventral margin net and back of the body lid edge top line of the net guiding principle, some lifting ropes are set.
List hull bottom laminar boom Pig list bladder type ocean of the present invention stratobios investigation sampling trawlnet, wherein said net head also comprises door curtain net, described door curtain net is arranged on the below of back of the body cover net, the front side edge of door curtain net is connected with back of the body lid hoddy by door curtain hoddy, the back side edge of door curtain net is fixedly connected with by door curtain edge guiding principle at equal intervals with between back of the body cover net, makes to form door curtain Pig between door curtain net and back of the body cover net.
List hull bottom laminar boom Pig list bladder type ocean of the present invention stratobios investigation sampling trawlnet, the upper limb guiding principle closed up and exaggerated is placed in wherein said back of the body lid hoddy, the lower edge guiding principle and ground rope that close up is placed in the front side edge of the described two panels triangulation network and ventral margin net, the two ends of described upper limb guiding principle are connected with the two ends of lower edge guiding principle, described exaggerated two ends are connected with the two ends of ground rope, described sinker be set in be positioned at ventral margin net ground rope on, the upper end of described some lifting ropes be fixedly connected on upper limb guiding principle respectively and exaggerated on, lower end is fixedly connected on lower edge guiding principle and ground rope respectively, the back side edge of described door curtain net places lace curtaining edge guiding principle.
List hull bottom laminar boom Pig list bladder type ocean of the present invention stratobios investigation sampling trawlnet, wherein said body comprises some back of the body body nets and the some slice abdomen body nets equal with its quantity, described back of the body body net and abdomen body net are all front wide and rear narrow inverted trapezoidal mesh sheet, described back of the body body net is positioned at abdomen body side on the net, the front end edge of described first paragraph back of the body body net is connected with the back end edge of back of the body cover net, the back end edge of first paragraph back of the body body net is connected with the front end edge that second segment carries on the back body net, the back end edge of described second segment back of the body body net is connected with the 3rd section of front end edge of carrying on the back body net, some back of the body body nets join end to end successively and connect, final stage back of the body body net back end edge is connected with the top of the front end edge of keed, the front end edge of described first paragraph abdomen body net is connected with the back end edge of belly, the back end edge of first paragraph abdomen body net is connected with the front end edge of second segment abdomen body net, the back end edge of described second segment abdomen body net is connected with the front end edge of the 3rd section of abdomen body net, some abdomen body nets join end to end successively and connect, final stage abdomen body net back end edge is connected with the bottom of the front end edge of keed, the left and right side of described first paragraph back of the body body net is connected with the left and right side of first paragraph abdomen body net respectively, the left and right side of described second segment back of the body body net is connected with the left and right side of second segment abdomen body net respectively, the left and right side of some back of the body body nets is connected with the left and right side of some corresponding abdomen body nets respectively, and the shape size of every section of back of the body body net and mesh size identical with the abdomen body net be connected.
List hull bottom laminar boom Pig list bladder type ocean of the present invention stratobios investigation sampling trawlnet, wherein saidly drag the termination that guiding principle is connected with outer fork guiding principle and be provided with a pair change and two shackles, between described a pair change, radial direction has placed a rotational pin, described two shackles are fastened in a pair change respectively, described in drag guiding principle and be connected with two shackles respectively with outer fork guiding principle.
List hull bottom laminar boom Pig list bladder type ocean of the present invention stratobios investigation sampling trawlnet, wherein said door curtain hoddy, door curtain net, back of the body lid hoddy, back of the body cover net, ventral margin net, belly are identical with the mesh size of the triangulation network, the mesh size of described body is less than net head, in described body, the mesh size of every section of back of the body body net reduces from front to back gradually, and the mesh size of described keed is less than body.
List hull bottom laminar boom Pig list bladder type ocean of the present invention stratobios investigation sampling trawlnet, all mesh sheet of wherein said trawlnet and gang rope use the torsade of polyethylene fibre plying to make.
List hull bottom laminar boom Pig list bladder type ocean of the present invention stratobios investigation sampling trawlnet, wherein said boom, body and keed arrange float for subsequent use.
List hull bottom laminar boom Pig list bladder type ocean of the present invention stratobios investigation sampling trawlnet, wherein said lower edge guiding principle pricks attached iron chains for subsequent use.
List hull bottom laminar boom Pig list bladder type ocean of the present invention stratobios investigation sampling trawlnet difference from prior art is that network interface place of the present invention is provided with boom, boom makes the width of network interface in use remain unchanged, row's door curtain net Pig is provided with in back of the body cover net net network interface, the spring that prevention networks is strong and regression is biological fast escapes, and body rear portion is easier after being connected to and making hauling with the keed exported takes out catches from trawlnet.
Below in conjunction with accompanying drawing, single hull bottom laminar boom Pig list bladder type ocean of the present invention stratobios investigation sampling trawlnet is described further.
Accompanying drawing explanation
Fig. 1 is the structural representation that single hull bottom laminar has wing list bladder type trawlnet;
Fig. 2 is the structural representation that two hull bottom laminar has wing list bladder type trawlnet;
Fig. 3 is the structural representation of single hull bottom laminar boom type trawlnet;
Fig. 4 is the structural representation of list hull bottom laminar boom Pig list bladder type marine benthos of the present invention investigation sampling trawlnet;
Fig. 5 is etting expanded view in list hull bottom laminar boom Pig list bladder type marine benthos of the present invention investigation sampling trawlnet;
Fig. 6 is change, shackle and drag guiding principle, outer fork guiding principle connection diagram in list hull bottom laminar boom Pig list bladder type marine benthos of the present invention investigation sampling trawlnet.
Embodiment
As shown in Figure 4, list hull bottom laminar boom Pig list bladder type ocean of the present invention stratobios investigation sampling trawlnet comprises and drags guiding principle 1, outer fork guiding principle 2, interior fork guiding principle 3, boom 4, sinker 5, net 6, body 7 and keed 8, drag guiding principle 1 to be connected with interior fork guiding principle 3 by outer fork guiding principle 2, interior fork guiding principle 3 is fixedly connected on the eye thimble of boom 4 left and right sides, the upper opening portion ligation of net 6 is connected on boom 4, sinker 5 is fixedly connected on the ground rope of net 6 lower opening portion, the cross section of body 7 reduces from front to back gradually, the large end of opening of body 7 and net 6 is connected, the opening small end of body 7 is connected with keed 8, keed 8 rear end arranges outlet, exit arranges keed tying rope 81.
In conjunction with as shown in Figure 5, net 6 comprises the back of the body cover net 61 of rectangle, the belly 62 of rectangle, the two panels triangulation network 63 and door curtain net 66, back of the body cover net 61 is arranged on the top of belly 62, is provided with and carries on the back lid hoddy 64, the front side edge of belly 62 is provided with ventral margin net 65 between back of the body cover net 61 and boom 4.The long base of the two panels triangulation network 63 is sewed up mutually with the front portion on back of the body limit, cover net 61 left and right sides and the limit, the left and right sides of carrying on the back lid hoddy 64 respectively and is connected, and the rear hypotenuse of the two panels triangulation network 63 is sewed up mutually with the front portion on limit, belly 62 left and right sides and the limit, the left and right sides of ventral margin net 65 respectively and is connected.The rear portion on back of the body limit, cover net 61 left and right sides is sewed up mutually with the rear portion on limit, belly 62 left and right sides and is connected.Sinker 5 is fixedly connected on before ventral margin net 65 on ground rope, the infraclass of ventral margin net 65 and back of the body lid hoddy 64 exaggerated between some lifting ropes 68 are set.Door curtain net 66 is arranged on the below of back of the body cover net 61, the front side edge of door curtain net 66 is connected through exaggerated to order with back of the body lid hoddy 64 by door curtain hoddy 67 simultaneously, the back end edge of door curtain net 66 utilizes door curtain edge to hang between guiding principle with back of the body cover net 61 and is laterally fixedly connected with around knot at equal intervals, makes to form several door curtain Pigs between door curtain net 66 and back of the body cover net 61.
Place upper limb guiding principle in back of the body lid hoddy 64 and door curtain hoddy 66 and exaggeratedly closed up ligation, lower edge guiding principle has been placed and ground rope closes up ligation in the front hypotenuse of the two panels triangulation network 63 and ventral margin net 65, the two ends of upper limb guiding principle are inserted to tie with the two ends of lower edge guiding principle and are connected, exaggerated two ends are inserted to tie with the two ends of ground rope and are connected, sinker 5 is set on the ground rope before being positioned at ventral margin net 65, the upper end of some lifting ropes 68 be fixedly connected on the upper limb guiding principle that closes up respectively and exaggerated on, lower end is separately fixed on the lower edge guiding principle and ground rope that close up, the back end edge of door curtain net 66 has placed lace curtaining edge guiding principle.
Body 7 comprises some back of the body body nets 71 and the some slice abdomen body nets 72 equal with its quantity, back of the body body net 71 and abdomen body net 72 are all front wide and rear narrow inverted trapezoidal mesh sheet, back of the body body net 71 is positioned at above abdomen body net 72, the front end edge of first paragraph back of the body body net is connected with the back end edge of back of the body cover net 61, the back end edge of first paragraph back of the body body net is connected with the front end edge that second segment carries on the back body net, the back end edge of second segment back of the body body net is connected with the 3rd section of front end edge of carrying on the back body net, some back of the body body nets join end to end successively and connect, final stage back of the body body net back end edge is connected with the top of the front end edge of keed 8, the front end edge of first paragraph abdomen body net is connected with the back end edge of belly 62, the back end edge of first paragraph abdomen body net is connected with the front end edge of second segment abdomen body net, the back end edge of second segment abdomen body net is connected with the front end edge of the 3rd section of abdomen body net, some abdomen body nets join end to end successively and connect, final stage abdomen body net back end edge is connected with the bottom of the front end edge of keed 8, the left and right side of first paragraph back of the body body net is connected with the left and right side of first paragraph abdomen body net respectively, the left and right side of second segment back of the body body net is connected with the left and right side of second segment abdomen body net respectively, the left and right side of some back of the body body nets is connected with the left and right side of some corresponding abdomen body nets respectively, and the shape size of every section of back of the body body net and mesh size identical with the abdomen body net be connected.
All mesh sheet of trawlnet and gang rope use the torsade of polyethylene fibre plying to make.Door curtain hoddy 67, door curtain net 66, back of the body lid hoddy 64, back of the body cover net 61, ventral margin net 65, belly 62 are identical with the mesh size of the triangulation network 63, the mesh size of body 7 is less than net 6, in body 7, the mesh size of every section of back of the body body net reduces from front to back gradually, and the mesh size of keed 8 is less than body 7.
As shown in Figure 6, drag the termination that guiding principle 1 is connected with outer fork guiding principle 2 and be provided with a pair change 91 and two shackles 92, between a pair change 91, radial direction has placed 93, two shackles 92 of a rotational pin and has been fastened on respectively in a pair change 91, drags guiding principle 1 and is connected with two shackles 92 respectively with outer fork guiding principle 2.
The principal dimensions that ocean, Hebei province and aquatic science research institute develop is 20.85m × 6.80m(11.94m) trawlnet be that in trawlnet of the present invention one represents, still there is plurality of specifications, but its basic structure principle is identical, just large small scale is different because of needs, describes no longer one by one.Exaggerated and the boom that is 5.28m that this netting gear adopts 5.20m long expands network interface, and this net ground rope presents catenary towing in process, and ground rope sweeps extra large width B=5.00m.Then sweep sea and amass S=B × L, L is for towing distance, and L=V × t, V are for towing ship's speed, and t is for towing the time.
Because door curtain hoddy, back of the body lid hoddy, the triangulation network, ventral margin net are all directly stressed mesh sheet, therefore thick than other parts of netting twine used, be PE42tex5 × 3; Four sections of abdomen body nets of belly and body are owing to being directly contact with seabed, therefore netting twine appropriateness is than the overstriking of other parts, is PE42tex4 × 3; Keed is finally adopt the sample collection portion of catching, therefore it is stressed comparatively large, and netting twine also adopts PE42tex5 × 3; Other parts adopt the netting twine of PE42tex3 × 3 to weave without exception.Each several part etting netting twine specification and size of mesh and mesh sheet yardstick see below table.
Mesh sheet material specification detail list
Door curtain hoddy and door curtain net, back of the body lid hoddy and the back of the body cover net, ventral margin net and the belly of netting head in this netting gear are rectangle mesh sheet, namely netting order number is played identical with incorporating mesh number into own forces, all 416 orders, and size of mesh is all 2a=25.0mm, and be all single fast knot, door curtain hoddy, back of the body lid hoddy and ventral margin net are all only knit 1 order with the netting twine of PE42tex5 × 3, and then thread-changing continues braiding respectively.The braiding that namely 19 orders complete door curtain net is knitted with the netting twine of PE42tex3 × 3; The braiding that namely 79 orders complete back of the body cover net is knitted with the netting twine of PE42tex3 × 3; The braiding that namely 58 orders complete belly is knitted with the netting twine of PE42tex4 × 3.
The back of the body body net of body all adopts the netting twine of PE42tex3 × 3 to weave; The abdomen body net of body all adopts the netting twine of PE42tex4 × 3 to weave, and is all single fast knot.First paragraph back of the body body net, abdomen body net play volume 416 order, longitudinally knit 60 orders, if 4 roads subtract order line, rise when compiling and subtract order line and be spaced apart 104 orders, per pass subtracts on order line and subtracts 30 orders, namely order line often knits 2 reduces 1 order subtracting of setting, method for expressing is 4-30(2r-l), be 296 orders when incorporating into own forces, namely subtracted 120 orders.Second segment back of the body body net, abdomen body net play volume 296 order, longitudinally knit 60 orders, if 4 roads subtract order line, rise when compiling and subtract order line and be spaced apart 74 orders, per pass subtracts on order line and subtracts 30 orders, namely order line often knits 2 reduces 1 order subtracting of setting, method for expressing is 4-30(2r-l), be 176 orders when incorporating into own forces, namely subtracted 120 orders.3rd section of back of the body body net, abdomen body net play volume 176 order, longitudinally knit 60 orders, if 4 roads subtract order line, rise when compiling and subtract order line and be spaced apart 44 orders, per pass subtracts on order line and subtracts 15 orders, namely order line often knits 4 reduces 1 order subtracting of setting, method for expressing is 4-15(4r-l), be 116 orders when incorporating into own forces, namely subtracted 60 orders.4th section of back of the body body net, abdomen body net play volume 116 order, longitudinally knit 60 orders, if 4 roads subtract order line, rise when compiling and subtract order line and be spaced apart 29 orders, per pass subtracts on order line and subtracts 4 orders, namely order line often knits 30 reduces 1 order subtracting of setting, method for expressing is 4-4(30r-l), be 100 orders when incorporating into own forces, namely subtracted 16 orders.
The keed of this netting gear is a tubular mesh sheet, and play volume 200 order with PE42tex5 × 3 netting twine, size of mesh is 2a=8.0mm, and longitudinally single fast knot knits 120 orders, does not do to increase and decrease, is still 200 orders when incorporating into own forces.The triangulation network mesh sheet of this netting gear adopts PE42tex5 × 3 netting twine list fast knot braiding, and play volume 1 order, longitudinally knit 50 orders, front 25 orders adopt accrue braiding, establish 1 road accrue line, accrue 24 order on this accrue line, namely often knit 2 joints and increase 1 order at mesh sheet edge; Start to subtract order after being increased to horizontal 25 orders, namely still establish 1 road to subtract order line at mesh sheet edge, subtract on order line at this and subtract 24 orders, namely often knit 2 and reduce 1 order, reduce to triangulation network when only having 1 order and be made into.The representation of first half accrue is 1+24 (2r+1); It is 1-24(2r-l that latter half subtracts object method for expressing).
The gang rope specification of this netting gear and consumption see the following form.
Gang rope material specification and detailed list of usage
| Sequence number | Gang rope title | Quantity | Gang rope material and specification | Gang rope length |
| 1 | Upper limb guiding principle | 1 | PE42texφ6.0S | 5.20m |
| 2 | Exaggerated | 1 | PE42texφ6.0Z | 5.20m |
| 3 | Lower edge guiding principle | 1 | PE42texφ6.0S | 6.74(5.20+0.77×2)m |
| 4 | Ground rope | 1 | PE42texφ6.0Z | 6.74(5.20+0.77×2)m |
| 5 | Lace curtaining edge guiding principle | 1 | PE42tex12×3 | 8.00m |
| 6 | Lifting rope 1 | 2 | PE42texφ6.0Z | 0.68m |
| 7 | Lifting rope 2 | 2 | PE42texφ6.0Z | 0.63m |
| 8 | Lifting rope 3 | 2 | PE42texφ6.0Z | 0.58m |
| 9 | Keed tying rope | 1 | PE42texφ4.0S | 1.60m |
| 10 | Interior fork guiding principle | 2 | PE42texφ12.0S | 4.00m |
| 11 | Outer fork guiding principle | 1 | PE42texφ16.0Z | 6.00m |
| 12 | Drag guiding principle | 1 | PE42texφ16.0S | 30.00～40.00m |
The accessory material specification of this netting gear and consumption see the following form.
Accessory material specification and detailed list of usage
| Sequence number | Accessory title | Quantity | Accessory material and specification | Gross weight |
| 1 | Boom | 1 | Galvanizing welded tube or glass reinforced plastic pipe | |
| 2 | Cast iron sinker | 33 | The each 400g of cast iron is heavy | 13.2kg |
| 3 | Change | 1 | Forged steel ring internal diameter >=50.0mm | |
| 4 | Shackle | 2 | Forged steel opening is wide >=40.0mm | |
| 5 | Iron chains for subsequent use | 10 meters | Little seagoing vessel anchor chain | |
| 6 | Float for subsequent use | 10 | Foamed plastics φ=100.0mm |
Note: float for subsequent use if desired on boom, body and keed in order to adjustment and increase buoyancy.
Iron chains for subsequent use is pricked if desired and is invested in infraclass to increase settling capacity.
The operation process of list hull bottom laminar boom Pig list bladder type marine benthos investigation sampling trawlnet of the present invention is summarized as follows:
1, operation ship
Boats and ships about overall length 15.00m, about molded breadth 3.50m, moldeed depth about 1.00, gross ton is l0Rt, main engine power 14.70kw.
2, net is put
(1) first the netting gear always installed is overlayed on the net platform of operation ship stern, boom network interface under, be that body, keed are upper successively.(2) first drop in water by keed when putting net, an operation ship middling speed moves ahead, and relies on the resistance of seawater, pulls into marine, after net form is all launched, steadily dropped into by boom marine by body network interface, then discharges inner and outer fork guiding principle, drags guiding principle.The release length of draging guiding principle is determined according to sea water advanced.Tie up to draging guiding principle in the bollard of ship stern after stable.Tow speeds control at 1.5-2.0 per hour in the sea, i.e. 1.5-2.0 joint.
3, hauling
(or determining the time with the sea situation as required) hauling afterwards that generally tows 30 minutes, receives strand with the power winch on ship and drags guiding principle, and after fork guiding principle and boom water outlet, artificial hook is hung boom and lain on ship stern net platform.Stack neatly with hand pickup etting, finally to choose keed, untie keed tying rope and pour out obtained biological sample, check that, with or without biologies such as the shrimps leapt in lace curtaining Pig, the professional and technical personnel together delivered with ship investigation carries out systematic searching qualification and quantitative record simultaneously.Then lashed keed outlet with keed tying rope, driven towards next erect-position and continue to put net.Because this netting gear is smaller and more exquisite, if ship does not have power winch, two crewman both can complete puts net, a net operation, very convenient.
Above-described example is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determines.
Claims (6)
1. single hull bottom laminar boom Pig list bladder type ocean stratobios investigation sampling trawlnet, is characterized in that: comprise and drag guiding principle (1), outer fork guiding principle (2), interior fork guiding principle (3), boom (4), sinker (5), net head (6), body (7) and keed (8); The described guiding principle (1) that drags is connected with interior fork guiding principle (3) by outer fork guiding principle (2), and described interior fork guiding principle (3) is fixedly connected on the eye thimble of boom (4) left and right sides; The upper opening portion of described net head (6) is fixedly connected on boom (4), described sinker (5) is fixedly connected on net head (6) lower opening portion, the cross section of described body (7) reduces from front to back gradually, the large end of opening of body (7) is connected with net head (6), the opening small end of body (7) is connected with keed (8), described keed (8) rear end arranges outlet, and described sample outlet position arranges keed tying rope (81);
Described net head (6) comprises the back of the body cover net (61) of rectangle, the belly (62) of rectangle and the two panels triangulation network (63), described back of the body cover net (61) is arranged on the top of belly (62), be provided with between described back of the body cover net (61) and boom (4) and carry on the back lid hoddy (64), the front end edge of described belly (62) is provided with ventral margin net (65), the long base of the described two panels triangulation network (63) is connected with the limit, the left and right sides of carrying on the back lid hoddy (64) with the front portion on back of the body cover net (61) limit, the left and right sides respectively, the rear hypotenuse of the two panels triangulation network (63) is connected with the limit, the left and right sides of ventral margin net (65) with the front portion on belly (62) limit, the left and right sides respectively, the rear portion on described back of the body cover net (61) limit, the left and right sides is connected with the rear portion on belly (62) limit, the left and right sides, described sinker (5) is fixedly connected on ventral margin net (65), between described ventral margin net (65) and back of the body lid hoddy (64), some lifting ropes (68) are set,
Described net head (6) also comprises door curtain net (66), described door curtain net (66) is arranged on the below of back of the body cover net (61), the front end edge of door curtain net (66) is connected with back of the body lid hoddy (64) by door curtain hoddy (67), the back end edge of door curtain net (66) utilizes between door curtain edge guiding principle with back of the body cover net (61) and is laterally fixedly connected with around knot at equal intervals, make to form several door curtain Pigs between door curtain net (66) and back of the body cover net (61), the back end edge of described door curtain net (66) has placed lace curtaining edge guiding principle;
Described body (7) comprises some back ofs the body body net (71) and the some slice abdomen body nets (72) equal with its quantity, described back of the body body net (71) and abdomen body net (72) are front wide and rear narrow inverted trapezoidal mesh sheet, described back of the body body net (71) is positioned at abdomen body net (72) top, the front end edge of first paragraph back of the body body net is connected with the back end edge of back of the body cover net (61), the back end edge of first paragraph back of the body body net is connected with the front end edge that second segment carries on the back body net, the back end edge of described second segment back of the body body net is connected with the 3rd section of front end edge of carrying on the back body net, some back of the body body nets join end to end successively and connect, final stage back of the body body net back end edge is connected with the top of the front end edge of keed (8), the front end edge of first paragraph abdomen body net is connected with the back end edge of belly (62), the back end edge of first paragraph abdomen body net is connected with the front end edge of second segment abdomen body net, the back end edge of described second segment abdomen body net is connected with the front end edge of the 3rd section of abdomen body net, some abdomen body nets join end to end successively and connect, final stage abdomen body net back end edge is connected with the bottom of the front end edge of keed (8), the left and right side of described first paragraph back of the body body net is connected with the left and right side of first paragraph abdomen body net respectively, the left and right side of described second segment back of the body body net is connected with the left and right side of second segment abdomen body net respectively, the left and right side of some back of the body body nets is connected with the left and right side of some corresponding abdomen body nets respectively, and the shape size of every section of back of the body body net and mesh size identical with the abdomen body net be connected,
Described door curtain hoddy (67), door curtain net (66), back of the body lid hoddy (64), back of the body cover net (61), ventral margin net (65), belly (62) are identical with the mesh size of the triangulation network (63), the mesh size of described body (7) is less than net head (6), in described body (7), the mesh size of every section of back of the body body net reduces from front to back gradually, and the mesh size of described keed (8) is less than body (7).
2. single hull bottom laminar boom Pig list bladder type ocean according to claim 1 stratobios investigation sampling trawlnet, it is characterized in that: placed upper limb guiding principle in described back of the body lid hoddy (64) and exaggerated ligation is closed up, lower edge guiding principle has been placed and ground rope ligation is closed up in the front hypotenuse of the described two panels triangulation network (63) and ventral margin net (65), the two ends of described upper limb guiding principle and the two ends socket connection of lower edge guiding principle, the two ends socket connection of described exaggerated two ends and ground rope, described sinker (5) is set in and is positioned on the front ground rope of ventral margin net (65), the upper end of described some lifting ropes (68) respectively ligation be fixedly connected on the upper limb guiding principle that closes up and exaggerated on, lower end respectively ligation is fixedly connected on the lower edge guiding principle and ground rope that close up.
3. according to the single hull bottom laminar boom Pig list bladder type ocean stratobios investigation sampling trawlnet one of claim 1 to 2 Suo Shu, it is characterized in that: described in drag the termination that guiding principle (1) is connected with outer fork guiding principle (2) and be provided with a pair change (91) and two shackles (92), between described a pair change (91), radial direction has placed a rotational pin (93), described two shackles (92) are fastened in a pair change (91) respectively, described in drag guiding principle (1) and be connected with two shackles (92) respectively with outer fork guiding principle (2).
4. single hull bottom laminar boom Pig list bladder type ocean according to claim 1 stratobios investigation sampling trawlnet, is characterized in that: all mesh sheet of described trawlnet and gang rope use the torsade of polyethylene fibre plying to make.
5. single hull bottom laminar boom Pig list bladder type ocean according to claim 1 stratobios investigation sampling trawlnet, is characterized in that: described boom (4), body (7) and keed (8) arrange float for subsequent use.
6. single hull bottom laminar boom Pig list bladder type ocean according to claim 2 stratobios investigation sampling trawlnet, is characterized in that: described ground rope is pricked attached iron chains for subsequent use.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210591771.3A CN103039407B (en) | 2012-12-31 | 2012-12-31 | One-boat beam haul-bag single-sac bottom trawl for investigating and sampling marine demersal creatures |
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| CN201210591771.3A CN103039407B (en) | 2012-12-31 | 2012-12-31 | One-boat beam haul-bag single-sac bottom trawl for investigating and sampling marine demersal creatures |
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| CN103039407B true CN103039407B (en) | 2015-04-08 |
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| SU1739541A1 (en) * | 1987-04-06 | 1994-06-15 | Научно-производственное объединение по промышленному и тепловодному рыбоводству | Fishing seine net |
| KR100510032B1 (en) * | 2001-12-03 | 2005-08-25 | 대한민국 | Fishing gear with escaping equipment for small fish |
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| CN203136825U (en) * | 2012-12-31 | 2013-08-21 | 河北省海洋与水产科学研究院 | Single vessel bottom layer beam hanging bag single-sac type ocean bottom-layer organism investigating sampling dragnet |
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| CN111903624A (en) * | 2020-06-05 | 2020-11-10 | 中国水产科学研究院东海水产研究所 | Gravity expanding type euphausia superba truss rod trawl fishing gear |
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