CN2932992Y

CN2932992Y - Sampling trawl for Antarctic krill

Info

Publication number: CN2932992Y
Application number: CN 200620043998
Authority: CN
Inventors: 黄洪亮; 陈雪忠; 郁岳峰; 张勋; 冯春雷; 周爱忠; 徐宝生
Original assignee: East China Sea Fishery Research Institute Chinese Academy of Fishery Sciences
Current assignee: East China Sea Fishery Research Institute Chinese Academy of Fishery Sciences
Priority date: 2006-07-18
Filing date: 2006-07-18
Publication date: 2007-08-15
Anticipated expiration: 2016-07-18

Abstract

A sampling trawl for the Antarctic krill relates to a trawl fishing gear for marine biological resources research, whose art question is to provide a trawl adapted for the Antarctic krill resources research. The utility model comprises a plurality of rhombic-mesh polythene net sheets, characterized in that the trawl has a length of 8.82 meters and a perimeter of 25.2 meters as tightening, wherein the net sheet which has a size of 50-60 mm in the net mesh and a net body in rear portion are all with double-deck, and the inner layer of the net body has a length of 38.5% to the outer layer of the net body, while the mesh of the outer layer opening has a size of 200mm, and the mesh of a net capsule has a size of 20mm, and the mesh of the inner layer net sheet has a size of 4.67mm. The inner net body is sewed with four canvases, and the upper side and the lower side of the net opening are separately equipped with an upper dimension and a lower dimension with length of 3 meters, while two sides of the net opening are flexible dimensions with length of 2 meters. The utility model applies in the Antarctic krill resources research trawl.

Description

Krill sampling trawlnet

Technical field:

The utility model relates to the trawlnet fishing gear of living marine resources investigation usefulness.

Background technology

The plankton haul of living marine resources investigation usefulness is become by multistage diamond mesh polythene net sheet assembled group, the length and width mesh number of each section of body net sheet is increased to the net capsule piecemeal by network interface, size of mesh is reduced to the net capsule piecemeal by network interface, the network interface upside is equipped raises to the higher plane of principle, the network interface downside is equipped with infraclass, network interface coupling yoke guiding principle, the fork guiding principle connects the change of draging guiding principle, by draging the haulage gear that guiding principle connects boats and ships.The krill aboundresources, exploitation prospect is wide.Present polar research ship power is big, the deck freeboard, but the trawlnet apparatus operating is simple, and there are bigger error in the plankton haul sampling result and the assessment result that are used for the krill investigation in the past, influence correctly understanding and grasping the krill resource.

The utility model content

The utility model technical issues that need to address provide the trawlnet that a kind of suitable polar research ship is used for the krill resource investigation.

The utility model is become by multistage diamond mesh polythene net sheet assembled group, it is characterized in that long 8.82 meters of trawlnet, 25.2 meters of network interface tension girths; Etting from the net sheet of body size of mesh 50-60mm to the rear portion adopts double-decker, and the length of its internal layer etting is equipped with by 38.5% of outer netting-length; Outer field network interface size of mesh 200mm, net keed order size 20mm, the size of mesh of inner layer net sheet is 4.67mm, the internal layer etting forms by the canvas stitching by four; The rigidity that the equipped respectively length of network interface upside and downside is 3 meters raises to the higher plane of principle and infraclass, and the network interface both sides are the flexible sides guiding principle of 2 meters of length.

The utility model is owing to adopt rigidity to raise to the higher plane of principle and infraclass, and the network interface expansion is stable, and the network interface area is controlled easily, the netting gear skin is formed by the polyethylene etting braiding than large mesh, it is little to have resistance, and network interface is swept the long-pending big advantage in sea, is applicable to the trawlnet of krill resource investigation.

Description of drawings

Fig. 1 is the back of the body, belly and the side net net figure of the utility model outer net.

Fig. 2 is the back of the body, belly and the side net net figure of the utility model Intranet.

Fig. 3 is a trawling schematic diagram of the present utility model.

Embodiment

Long 8.82 meters of the utility model net, 25.2 meters of network interface tension girths, polythene PE net sheet assembled group by the multistage diamond mesh becomes, and the mesh number of each section netting width, length direction is increased to the net capsule piecemeal by network interface, and the size of mesh 2a of each section net sheet is reduced to the net capsule piecemeal by network interface; From the size of mesh 2a of body is the etting employing double-decker of the net sheet of 50-60mm to the rear portion, the length of internal layer etting is equipped with by 38.5% of outer netting-length, outer net (Fig. 1) plays the effect that object and protection internal layer etting are fished in interception, the concrete size of mesh 2a (Fig. 1) of each section of outer net (Fig. 1) net sheet is respectively 200 by network interface to the net capsule in regular turn, 170,140,110,90,70,60,50,40,30,20mm, it is 5 by network interface to the net capsule in regular turn that length (height) the degree order of each section of outer net net sheet is counted N (Fig. 1), 5,6,7,8,10,10,12,15,18,80 orders, each section of outer net (Fig. 1) back of the body, the width order number of belly sheet is 38 by network interface to the net capsule in regular turn, 40,44,48,52,58,60,62,62,66,80 orders, the width order number of outer net (Fig. 1) both sides net sheet is 25 by network interface to the net capsule in regular turn, 26,28,34,36,40,40,40,42,42,46 orders; Each section of outer net polythene PE (Fig. 1) net sheet is respectively the mesh grid sheet of 54,45,33,33,27,27,21,21,21,21,27 line thighs in regular turn to the net capsule by network interface; Intranet (Fig. 2) plays induces and obtains the effect of fishing for object, Intranet is the four-piece type structure, adopt 9 line thigh polythene PE net sheets, size of mesh is 4.67mm, the long N of body net (Fig. 2) 364 orders of Intranet, wide 199 orders, wide 86 orders in back before the Intranet back of the body, the belly sheet, wide 128 orders, wide 50 orders in back before the side net sheet of interior body net, the long N of net capsule (Fig. 2) 364 orders of Intranet, wide before the upper and lower net sheet of the net capsule of Intranet, wide 86 orders that are in back, wide before the net capsule side net sheet of Intranet, wide 50 orders that are in back form by the canvas stitching between every; The network interface of the utility model body partly adopts the other structure in full limit, no taper ratio, and network interface part of horizontal hanging ratio is 0.4, directly is sewn on the edge guiding principle, edge guiding principle material is the knit nylon rope of diameter 6mm; The rear portion networking capsule 13 and the Intranet 14 of the utility model (see figure 3) outer net 8, outer net 8 network interfaces that constitute at back of the body net 5, belly 6 and side net 7 are equipped with headline 9, infraclass 10, for guaranteeing that the network interface expansion is stable in operation process, headline 9, infraclass 10 adopt diameter 120mm respectively, grow 3 meters rigidity headline, rigidity infraclass, rigidity raises to the higher plane of principle and the most handy zinc-plated galvanized iron pipe of rigidity infraclass, the network interface both sides are equipped with the flexible sides guiding principle, and upper and lower guiding principle and side guiding principle connect with the edge guiding principle respectively; For easy to carry, raise to the higher plane of principle and infraclass respectively by 31 meter long zinc-plated galvanized iron pipe employing thread connection; For network interface being magnified and being convenient to the sedimentation of netting gear, side guiding principle 11 and infraclass 10 add the footpath 12.7mm chain 12 of reaching the standard grade respectively, and these chain 12 unit weights are 3.55 kilograms/meter, and its length is configured to long 2 times of installation position guiding principle; Fork guiding principles 3 are gone up in 6 of 9 assemblings of raising to the higher plane of principle, on pitch guiding principle and bear net resistance in the operation process, 2 lower fork guiding principles 4 of infraclass 10 assemblings keep the job state of netting gear infraclass; Last fork guiding principle 3, lower fork guiding principle 4 drag guiding principle 1 by change 2 connections, and when towing speed 3.5 joints, emit 400 meters and drag guiding principle, part dive to the 100 meter water layer but netting gear is raised to the higher plane of principle, network interface is swept 6 square metres of the long-pending maintenances in sea.

Claims

1. krill sampling trawlnet is become by multistage diamond mesh polythene net sheet assembled group, it is characterized in that long 8.82 meters of trawlnet, 25.2 meters of network interface tension girths; Etting from the net sheet of body size of mesh 50-60mm to the rear portion adopts double-decker, and the length of its internal layer etting is equipped with by 38.5% of outer netting-length; Outer field network interface size of mesh 200mm, net keed order size 20mm, the size of mesh of inner layer net sheet is 4.67mm, the internal layer etting forms by the canvas stitching by four; The rigidity that the equipped respectively length of network interface upside and downside is 3 meters raises to the higher plane of principle and infraclass, and the network interface both sides are the flexible sides guiding principle of 2 meters of length.

2. krill sampling trawlnet according to claim 1, it is characterized in that each section of outer net net sheet size of mesh uses 200 respectively by network interface in regular turn to keed, 170,140,110,90,70,60,50,40,30,20mm, the length order number of each section net sheet is arranged as 5 by network interface in regular turn to keed, 5,6,7,8,10,10,12,15,18,80 orders, each section back of the body, belly sheet width order number is arranged as 38 by network interface in regular turn to keed, 40,44,48,52,58,60,62,62,66,80 orders, both sides netting width order number is arranged as 25 by network interface in regular turn to keed, 26,28,34,36,40,40,40,42,42,46 orders.

3. krill sampling trawlnet according to claim 1 and 2 is characterized in that outer each section polythene net sheet adopts 54,45,33,33,27,27,21,21,21,21,27 line thigh net sheets by network interface in regular turn to keed.

4. krill according to claim 1 and 2 sampling trawlnet is characterized in that raising to the higher plane of principle and infraclass adopts thread connection to form by 31 meter long zinc-plated galvanized iron pipe respectively.

5. krill sampling trawlnet according to claim 1 and 2 is characterized in that side guiding principle and infraclass are by 2 times of long equipped line footpath 12.7mm chains of installation position guiding principle.