CN103039407A - 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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- CN103039407A CN103039407A CN2012105917713A CN201210591771A CN103039407A CN 103039407 A CN103039407 A CN 103039407A CN 2012105917713 A CN2012105917713 A CN 2012105917713A CN 201210591771 A CN201210591771 A CN 201210591771A CN 103039407 A CN103039407 A CN 103039407A
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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 basis comprehensive survey, and annual China all will carry out routine investigation work in each sea area, in the scientific investigation in the South Pole, the arctic and ocean, and the ocean stratobios investigation content that also is absolutely necessary.At present, the stratobios investigation of carrying out in polar region and ocean adopts single hull bottom laminar that wing list capsule type trawlnet (such as Fig. 1) is arranged, by the oceanographic vessel that is provided with stern chute or large-scale stern ramp trawler operation.China's immediate offshore area stratobios investigation adopts two hull bottom laminars that wing list capsule type trawlnet (such as Fig. 2) or single hull bottom laminar boom type trawlnet (such as Fig. 3) operation are arranged.These three kinds of trawlnets are commercial fishing net originally, and respectively there is excellent, shortcoming in the requirement to Yu Haiyang stratobios investigation operation.Single hull bottom laminar has wing list capsule type trawlnet to have 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 to expand by the horizontal component that two towed web plates are produced by water impact, and current are affected by towing speed mainly, so the expansion width of network interface is difficult for stable.Two hull bottom laminars have wing list capsule type trawlnet to have equally can actively chase nekton and benthon, comparatively initiative and flexible, job area is wider, catching rate is higher, the easier advantage of taking a sample decide but its network interface is spacing when towing by two ships, so the network interface width also is unsettled, simultaneously, two ships tow operation has increased each other contact communication and the tired standard of coordinating actions.Single hull bottom laminar boom type trawlnet is traditional Nearshore Shallow Sea operation netting gear, its advantage is that the network interface width is fixing expansion of boom of raising to the higher plane of principle at network interface by ligation, can in operation process, remain unchanged, moreover, the top has row to be folded to the interior Pig (being commonly called as lace curtaining) of mesh bag in this netting gear network interface, spring in entering net strong (such as prawn) and velocity of recession are comparatively fast (such as cuttlefish, squid) after necton networks, when wish is run away to the back upper place by spring or quick regression, but dropped in the Pig, improved the accuracy of sampling, but this netting gear does not have the net capsule of after-opening, so very inconvenient when getting catches.
Summary of the invention
It is stable that the technical problem to be solved in the present invention provides a kind of network interface width, can effectively prevent the strong and fast biological escape of regression of the spring that networks, and then raising sampling accuracy, get easily simultaneously catches, single hull bottom laminar boom Pig list capsule type ocean stratobios investigation sampling 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 marine culture and stock enhancement district ecotope recovery technique and demonstration ", realize that through creationary effort concrete technical scheme is as follows.
The single hull bottom laminar of the present invention boom Pig list capsule type ocean stratobios investigation sampling trawlnet, comprise and drag guiding principle, outer fork guiding principle, interior fork guiding principle, boom, sinker, the 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 the boom, described sinker is fixedly connected on a net lower opening portion, the cross section of described body is oval, and dwindle gradually from front to back, the large end of the opening of body is connected with the net head, the opening small end of body is connected with keed, described keed rear end arranges outlet, described exit arranges the keed tying rope, is used for tightening the keed outlet.
The single hull bottom laminar of the present invention boom Pig list capsule type ocean stratobios investigation sampling trawlnet, wherein said net head comprises the back of the body cover net of rectangle, belly and two triangulation networks of rectangle; Described back of the body cover net is arranged on the top of belly, is provided with the back of the body between described back of the body cover net and the boom and covers hoddy; Be provided with the ventral margin net on the front side edge of described belly, the long base of described two triangulation networks is connected with the limit, the left and right sides that the back of the body covers hoddy with the front portion on back of the body limit, the cover net left and right sides respectively, and the rear hypotenuse of two triangulation networks is connected with the front portion on limit, the belly left and right sides and the limit, the left and right sides of ventral margin net 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 on ground rope, and fixedly ligation on the lower edge guiding principle of ventral margin net; The lower edge guiding principle of described ventral margin net and the back of the body cover between the upper limb guiding principle of hoddy some lifting ropes are set.
The single hull bottom laminar of the present invention boom Pig list capsule type ocean stratobios investigation sampling trawlnet, wherein said net head also comprises the 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 covered hoddy by the door curtain hoddy with the back of the body and is connected, the back side edge of door curtain net uniformly-spaced is fixedly connected with by door curtain edge guiding principle between the cover net with the back of the body, makes formation door curtain Pig between door curtain net and the back of the body cover net.
The single hull bottom laminar of the present invention boom Pig list capsule type ocean stratobios investigation sampling trawlnet, place upper limb guiding principle and the headline that closes up in the wherein said back of the body lid hoddy, place lower edge guiding principle and the ground rope that closes up in the front side edge of described two triangulation networks and the ventral margin net, the two ends of described upper limb guiding principle are connected with the two ends of lower edge guiding principle, the two ends of described headline are connected with the two ends of ground rope, described sinker is set on the ground rope that is positioned at the ventral margin net, the upper end of described some lifting ropes is fixedly connected on respectively on upper limb guiding principle and the headline, the lower end is fixedly connected on respectively on lower edge guiding principle and the ground rope, has placed lace curtaining edge guiding principle on the back side edge of described door curtain net.
The single hull bottom laminar of the present invention boom Pig list capsule type ocean stratobios investigation sampling trawlnet, wherein said body comprises some back of the body body nets and some abdomen body nets that equate with its quantity, described back of the body body net and abdomen body net all are front wide and rear narrow inverted trapezoidal net 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 of second segment back of the body body net, the back end edge of described second segment back of the body body net is connected with the front end edge of the 3rd section back of the body 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 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 sides side of described first paragraph back of the body body net is connected with the left and right sides side of first paragraph abdomen body net respectively, the left and right sides side of described second segment back of the body body net is connected with the left and right sides side of second segment abdomen body net respectively, the left and right sides side of some back of the body body nets is connected with the left and right sides side of corresponding some abdomen body nets respectively, and shape size and the mesh size of every section back of the body body net are identical with the abdomen body net that is connected.
The single hull bottom laminar of the present invention boom Pig list capsule type ocean 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 of change and two shackles, radially placed a rotational pin between the described a pair of change, described two shackles are fastened on respectively in a pair of change, and the described guiding principle that drags is connected with two shackles respectively with outer fork guiding principle.
The single hull bottom laminar of the present invention boom Pig list capsule type ocean stratobios investigation sampling trawlnet, the mesh size that wherein said door curtain hoddy, door curtain net, the back of the body cover hoddy, back of the body cover net, ventral margin net, belly and the triangulation network is identical, the mesh size of described body is less than the net head, the mesh size of every section back of the body body net reduces from front to back gradually in the described body, and the mesh size of described keed is less than body.
The single hull bottom laminar of the present invention boom Pig list capsule type ocean stratobios investigation sampling trawlnet, all net sheets of wherein said trawlnet and gang rope use the torsade of polyethylene fibre plying to make.
The single hull bottom laminar of the present invention boom Pig list capsule type ocean stratobios investigation sampling trawlnet arranges float for subsequent use on wherein said boom, body and the keed.
The single hull bottom laminar of the present invention boom Pig list capsule type ocean stratobios investigation sampling trawlnet is pricked attached iron chains for subsequent use on the wherein said lower edge guiding principle.
The single hull bottom laminar of the present invention boom Pig list capsule type ocean stratobios investigation sampling trawlnet difference from prior art is that network interface of the present invention place is provided with boom, boom in use remains unchanged the width of network interface, be provided with row's door curtain net Pig in the back of the body cover net net network interface, strong and the regression of the spring that stop to network is biological the escape fast, and the body rear portion has connected with the keed that exports makes the easier catches that takes out after the hauling from trawlnet.
Below in conjunction with accompanying drawing single hull bottom laminar boom Pig list capsule type of the present invention ocean stratobios investigation sampling trawlnet is described further.
Description of drawings
Fig. 1 is the structural representation that single hull bottom laminar has wing list capsule type trawlnet;
Fig. 2 has the structural representation of wing list capsule type trawlnet for two hull bottom laminars;
Fig. 3 is the structural representation of single hull bottom laminar boom type trawlnet;
Fig. 4 is the structural representation of the single hull bottom laminar of the present invention boom Pig list capsule type marine benthos investigation sampling trawlnet;
Fig. 5 is etting expanded view in the single hull bottom laminar of the present invention boom Pig list capsule type marine benthos investigation sampling trawlnet;
Fig. 6 is change, shackle and drag guiding principle, outer fork guiding principle connection diagram in the single hull bottom laminar of the present invention boom Pig list capsule type marine benthos investigation sampling trawlnet.
Embodiment
As shown in Figure 4, the single hull bottom laminar of the present invention boom Pig list capsule type ocean 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, draging guiding principle 1 is 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 the boom 4, sinker 5 is fixedly connected on the ground rope of net 6 lower opening portion, the cross section of body 7 dwindles from front to back gradually, the large end of the opening of body 7 is connected with net 6, the opening small end of body 7 is connected with keed 8, keed 8 rear ends arrange outlet, and the exit arranges keed tying rope 81.
In conjunction with as shown in Figure 5, net 6 comprises the belly 62 of back of the body cover net 61, the rectangle of rectangle, two triangulation networks 63 and door curtain net 66, back of the body cover net 61 is arranged on the top of belly 62, is provided with the back of the body between back of the body cover net 61 and the boom 4 and covers hoddy 64, is provided with ventral margin net 65 on the front side edge of belly 62.The long base of two triangulation networks 63 respectively with the front portion on back of the body limit, cover net 61 left and right sides be connected the limit, the left and right sides of covering hoddy 64 and sew up mutually and be connected, the rear hypotenuse of two triangulation networks 63 is sewed up mutually with the limit, the left and right sides of being connected with the ventral margin net in the front portion on limit, belly 62 left and right sides 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 the ventral margin net 65 front ground ropes, and the infraclass of ventral margin net 65 and the back of the body cover between the headline of hoddy 64 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 by door curtain hoddy 67 and the back of the body cover hoddy 64 simultaneously to order pass the headline be connected, the back end edge of door curtain net 66 is utilized the door curtain edge to hang guiding principle and laterally uniformly-spaced is fixedly connected with around knot between the cover net 61 with the back of the body, makes several door curtain Pigs of formation between door curtain net 66 and the back of the body cover net 61.
The back of the body cover and has placed the upper limb guiding principle in hoddy 64 and the door curtain hoddy 66 and headline closes up ligation, placed the lower edge guiding principle in the front hypotenuse of two triangulation networks 63 and the ventral margin net 65 and ground rope closes up ligation, the two ends of upper limb guiding principle are inserted knot with the two ends of lower edge guiding principle and are connected, the two ends of raising to the higher plane of principle are inserted knot with the two ends of ground rope and are connected, sinker 5 is set on the ground rope that is positioned at before the ventral margin net 65, the upper end of some lifting ropes 68 is fixedly connected on respectively on the upper limb guiding principle and headline that closes up, the lower end is separately fixed on the lower edge guiding principle and ground rope that closes up, and has placed lace curtaining edge guiding principle on the back end edge of door curtain net 66.
Body 7 comprises some back of the body body nets 71 and some abdomen body nets 72 that equate with its quantity, back of the body body net 71 and abdomen body net 72 all are front wide and rear narrow inverted trapezoidal net sheet, back of the body body net 71 is positioned at abdomen body net 72 tops, 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 of second segment back of the body body net, the back end edge of second segment back of the body body net is connected with the front end edge of the 3rd section back of the body 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 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 sides side of first paragraph back of the body body net is connected with the left and right sides side of first paragraph abdomen body net respectively, the left and right sides side of second segment back of the body body net is connected with the left and right sides side of second segment abdomen body net respectively, the left and right sides side of some back of the body body nets is connected with the left and right sides side of corresponding some abdomen body nets respectively, and shape size and the mesh size of every section back of the body body net are identical with the abdomen body net that is connected.
All net sheets of trawlnet and gang rope use the torsade of polyethylene fibre plying to make.Door curtain hoddy 67, door curtain net 66, the back of the body covers hoddy 64, carry on the back 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, the mesh size of every section back of the body body net reduces from front to back gradually in the body 7, 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 of change 91 and two shackles 92, radially placed 93, two shackles 92 of a rotational pin between a pair of change 91 and be fastened on respectively in a pair of change 91, draged guiding principle 1 and be connected with two shackles 92 respectively with outer fork guiding principle 2.
The principal dimensions of ocean, Hebei province and aquatic science research institute development is that the trawlnet of 20.85m * 6.80m(11.94m) is a representative in the trawlnet of the present invention, plurality of specifications is still arranged, but its basic structure principle is identical, is that large small scale is different because of needs, no longer one by one narration.This netting gear adopts the long headline of 5.20m and the boom of 5.28m to expand network interface, and this net ground rope presents the stretched wire wire in towing process, and ground rope is swept extra large width B=5.00m.Then sweep the long-pending S=B * L in sea, L is for towing distance, L=V * t, and V is for towing ship's speed, and t is for towing the time.
Because it all is direct stressed net sheet that door curtain hoddy, the back of the body covers hoddy, the triangulation network, ventral margin net, thus used netting twine than other parts slightly, be PE42tex5 * 3; Four sections abdomen body nets of belly and body are owing to being directly to contact with the seabed, so the netting twine appropriateness is PE42tex4 * 3 than the overstriking of other parts; Keed is for finally to adopt the sample collection section of catching, so it is stressed larger, netting twine also adopts PE42tex5 * 3; Other parts adopt the netting twine braiding of PE42tex3 * 3 without exception.Each several part etting netting twine specification and size of mesh and net sheet yardstick see below table.
Net sheet material specification detail list
The door curtain hoddy of net head and door curtain net, the back of the body cover hoddy and carry on the back cover net, ventral margin net and belly and be the rectangle net sheet in this netting gear, namely play netting order number and incorporate mesh into own forces and count up to entirely identical, all be 416 orders, and size of mesh all is 2a=25.0mm, and all be single fast knot, the door curtain hoddy, the back of the body covers hoddy and the ventral margin net all is only to knit 1 order with the netting twine of PE42tex5 * 3, and then thread-changing continues braiding respectively.Knit the braiding that 19 orders have namely been finished the door curtain net with the netting twine of PE42tex3 * 3; Knit the braiding that 79 orders have namely been finished back of the body cover net with the netting twine of PE42tex3 * 3; Knit the braiding that 58 orders have namely been finished belly with the netting twine of PE42tex4 * 3.
The back of the body body net of body all adopts the netting twine braiding of PE42tex3 * 3; The abdomen body net of body all adopts the netting twine braiding of PE42tex4 * 3, all is single fast knot.First paragraph back of the body body net, abdomen body net rise and compile 416 orders, vertically knit 60 orders, establish 4 roads and subtract the order line, subtract the order line when playing volume and be spaced apart 104 orders, per pass subtracts and subtracts 30 orders on the order line, namely whenever knits 2 on the order line subtracting of setting and reduces 1 order, 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 rise and compile 296 orders, vertically knit 60 orders, establish 4 roads and subtract the order line, subtract the order line when playing volume and be spaced apart 74 orders, per pass subtracts and subtracts 30 orders on the order line, namely whenever knits 2 on the order line subtracting of setting and reduces 1 order, method for expressing is 4-30(2r-l), be 176 orders when incorporating into own forces, namely subtracted 120 orders.The 3rd section back of the body body net, abdomen body net rise and compile 176 orders, vertically knit 60 orders, establish 4 roads and subtract the order line, subtract the order line when playing volume and be spaced apart 44 orders, per pass subtracts and subtracts 15 orders on the order line, namely whenever knits 4 on the order line subtracting of setting and reduces 1 order, method for expressing is 4-15(4r-l), be 116 orders when incorporating into own forces, namely subtracted 60 orders.The 4th section back of the body body net, abdomen body net rise and compile 116 orders, vertically knit 60 orders, establish 4 roads and subtract the order line, subtract the order line when playing volume and be spaced apart 29 orders, per pass subtracts and subtracts 4 orders on the order line, namely whenever knits 30 on the order line subtracting of setting and reduces 1 order, 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 cylinder mesh sheet, rises with PE42tex5 * 3 netting twines and compiles 200 orders, and size of mesh is 2a=8.0mm, and vertical single fast knot is knitted 120 orders, does not does not increase and decrease, and is still 200 orders when incorporating into own forces.The triangulation network net sheet of this netting gear adopts PE42tex5 * 3 netting twine list fast knots braiding, rises and compiles 1 order, vertically knits 50 orders, and front 25 orders adopt the accrue braiding, establish 1 road accrue line at net sheet edge, and accrue 24 orders on this accrue line are namely whenever knitted 2 joints and increased 1 order; Begin to subtract order after being increased to horizontal 25 orders, namely still establish 1 road at net sheet edge and subtract the order line, subtract the order line at this and subtract 24 orders, namely whenever knit 2 and reduce 1 order, reduce to that the triangulation network is made into when only having 1 order.The expression mode of first half accrue is 1+24 (2r+1); It is 1-24(2r-l that latter half subtracts the purpose method for expressing).
Gang rope specification and the consumption of this netting gear see the following form.
Gang rope material specification and detailed list of usage
| Sequence number | The gang rope title | Quantity | Gang rope material and specification | |
| 1 | The upper |
1 | PE42texφ6.0S | 5.20 |
| 2 | Raise to the higher plane of |
1 | PE42texφ6.0Z | 5.20m |
| 3 | The lower |
1 | PE42texφ6.0S | 6.74(5.20+0.77×2) |
| 4 | |
1 | PE42texφ6.0Z | 6.74(5.20+0.77×2)m |
| 5 | Lace curtaining |
1 | PE42tex12×3 | 8.00 |
| 6 | |
2 | PE42texφ6.0Z | 0.68m |
| 7 | |
2 | PE42texφ6.0Z | 0.63 |
| 8 | Lifting rope 3 | 2 | PE42texφ6.0Z | 0.58m |
| 9 | The |
1 | PE42texφ4.0S | 1.60m |
| 10 | Interior |
2 | PE42texφ12.0S | 4.00m |
| 11 | Outer |
1 | PE42texφ16.0Z | 6.00m |
| 12 | |
1 | PE42texφ16.0S | 30.00～40.00m |
Accessory material specification and the consumption of this netting gear see the following form.
Accessory material specification and detailed list of usage
| Sequence number | The accessory title | Quantity | Accessory material and specification | |
| 1 | |
1 | Galvanizing welded tube or glass reinforced |
|
| 2 | The cast iron sinker | 33 | Each 400g of cast iron is heavy | 13.2kg |
| 3 | Change | 1 | Forged steel ring internal diameter 〉=50.0 |
|
| 4 | |
2 | The forged steel opening is wide 〉=40.0mm | |
| 5 | Iron chains for subsequent use | 10 meters | Little seagoing |
|
| 6 | Float for subsequent use | 10 | Foamed plastics φ=100.0mm |
Annotate: float for subsequent use is used on boom, body and the keed in case of necessity in order to adjust and increase buoyancy.
Iron chains for subsequent use is pricked in case of necessity and is invested on the infraclass to increase settling capacity.
The operation process of the single hull bottom laminar of the present invention boom Pig list capsule type marine benthos investigation sampling trawlnet is summarized as follows:
1, operation ship
About boats and ships overall length 15.00m, about molded breadth 3.50m, moldeed depth about 1.00, gross ton is l0Rt, main engine power 14.70kw.
2, put net
The netting gear that (1) will always install first overlays on the net platform of operation ship stern, and the boom network interface is that body, keed are upper lower successively.(2) put net and the time first keed is dropped in the water, an operation ship middling speed moves ahead, and relies on the resistance of seawater, the body network interface is pulled into marine, after net form is all launched, boom is steadily dropped into marine, then discharges the inner and outer fork guiding principle, drags guiding principle.According to sea water advanced release length of determining to drag guiding principle.To drag guiding principle after stablizing ties up on the bollard of ship stern.The speed of towing per hour is controlled at 1.5-2.0 in the sea, i.e. the 1.5-2.0 joint.
3, hauling
The hauling after (or determining the time with sea situation as required) that generally tows 30 minutes is received strand with the power winch on the ship and is draged guiding principle, after pitching guiding principle and boom water outlet, manually colludes and hangs boom and lie on the ship stern net platform.Picking up etting with hand stacks neatly, the keed of choosing at last, untie the keed tying rope and pour out the biological sample that obtains, check simultaneously to have or not the biologies such as shrimps that leap in the lace curtaining Pig, the professional and technical personnel who together delivers with the ship investigation carries out systematic searching evaluation and quantitative record.Then lashed the keed outlet with the keed tying rope, driven towards next erect-position and continue to put net.Because this netting gear is smaller and more exquisite, if there is not power winch on the ship, two crewman both can finish puts net, a net operation, very convenient.
Above-described example 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. single hull bottom laminar boom Pig list capsule 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 the boom (4), described sinker (5) is fixedly connected on net head (6) lower opening portion, the cross section of described body (7) dwindles 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).
2. single hull bottom laminar boom Pig list capsule type according to claim 1 ocean stratobios investigation sampling trawlnet, it is characterized in that: described net head (6) comprises the back of the body cover net (61) of rectangle, the belly of rectangle (62) and two triangulation networks (63), described back of the body cover net (61) is arranged on the top of belly (62), be provided with the back of the body between described back of the body cover net (61) and the boom (4) and cover hoddy (64), be provided with ventral margin net (65) on the front end edge of described belly (62), the long base of described two triangulation networks (63) is connected with the limit, the left and right sides that the back of the body covers 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 two triangulation networks (63) is connected with the front portion on belly (62) limit, the left and right sides and the limit, the left and right sides of ventral margin net (65) 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 the ventral margin net (65), and described ventral margin net (65) and the back of the body cover some lifting ropes (68) are set between the hoddy (64).
3. single hull bottom laminar boom Pig list capsule type according to claim 2 ocean stratobios investigation sampling trawlnet, it is characterized in that: 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 covered hoddy (64) by door curtain hoddy (67) with the back of the body and is connected, the back end edge of door curtain net (66) is utilized between door curtain edge guiding principle and back of the body cover net (61) and laterally uniformly-spaced is fixedly connected with around knot, make between door curtain net (66) and the back of the body cover net (61) and form several door curtain Pigs, placed lace curtaining edge guiding principle on the back end edge of described door curtain net (66).
4. single hull bottom laminar boom Pig list capsule type according to claim 3 ocean stratobios investigation sampling trawlnet, it is characterized in that: placed the upper limb guiding principle in the described back of the body lid hoddy (64) and the headline ligation is closed up, placed the lower edge guiding principle in the front hypotenuse of described two triangulation networks (63) and the ventral margin net (65) and the ground rope ligation is closed up, the two ends socket connection of the two ends of described upper limb guiding principle and lower edge guiding principle, the two ends socket connection of the two ends of described headline 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 is fixedly connected on the upper limb guiding principle and headline that closes up, and lower end respectively ligation is fixedly connected on the lower edge guiding principle and ground rope that closes up.
5. single hull bottom laminar boom Pig list capsule type according to claim 2 ocean stratobios investigation sampling trawlnet, it is characterized in that: described body (7) comprises some back of the body body nets (71) and the some abdomen body nets (72) that equate with its quantity, described back of the body body net (71) and abdomen body net (72) are front wide and rear narrow inverted trapezoidal net sheet, described back of the body body net (71) is positioned at abdomen body net (72) top, 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 (61), the back end edge of first paragraph back of the body body net is connected with the front end edge of second segment back of the body body net, the back end edge of described second segment back of the body body net is connected with the front end edge of the 3rd section back of the body 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 described 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 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 sides side of described first paragraph back of the body body net is connected with the left and right sides side of first paragraph abdomen body net respectively, the left and right sides side of described second segment back of the body body net is connected with the left and right sides side of second segment abdomen body net respectively, the left and right sides side of some back of the body body nets is connected with the left and right sides side of corresponding some abdomen body nets respectively, and shape size and the mesh size of every section back of the body body net are identical with the abdomen body net that is connected.
6. according to claim 1 to one of 5 described single hull bottom laminar boom Pig list capsule type ocean stratobios investigation sampling trawlnets, it is characterized in that: describedly drag the termination that guiding principle (1) is connected with outer fork guiding principle (2) and be provided with a pair of change (91) and two shackles (92), radially placed a rotational pin (93) between the described a pair of change (91), described two shackles (92) are fastened on respectively in a pair of change (91), and the described guiding principle (1) that drags is connected with two shackles (92) respectively with outer fork guiding principle (2).
7. according to claim 1 to one of 5 described single hull bottom laminar boom Pig list capsule type ocean stratobios investigation sampling trawlnets, it is characterized in that: described door curtain hoddy (67), door curtain net (66), the back of the body covers hoddy (64), carry on the back 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), the mesh size of every section back of the body body net reduces from front to back gradually in the described body (7), and the mesh size of described keed (8) is less than body (7).
8. single hull bottom laminar boom Pig list capsule type according to claim 7 ocean stratobios investigation sampling trawlnet, it is characterized in that: all net sheets of described trawlnet and gang rope use the torsade of polyethylene fibre plying to make.
9. single hull bottom laminar boom Pig list capsule type ocean stratobios investigation sampling trawlnet according to claim 1 is characterized in that: on described boom (4), body (7) and the keed (8) float for subsequent use can be set.
10. single hull bottom laminar boom Pig list capsule type ocean stratobios investigation sampling trawlnet according to claim 4 is characterized in that: can prick attached iron chains for subsequent use on the described ground rope.
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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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