CN101654144B

CN101654144B - Method for removing enteromorpha from round haul seines on surface layers of two ships

Info

Publication number: CN101654144B
Application number: CN2008100418182A
Authority: CN
Inventors: 郁岳峰; 王鲁民; 张勋; 周爱忠
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: 2008-08-18
Filing date: 2008-08-18
Publication date: 2011-12-07
Anticipated expiration: 2028-08-18
Also published as: CN101654144A

Abstract

The invention discloses a method for removing enteromorpha from round haul seines on surface layers of two ships, and relates to a technique for removing the enteromorpha, wherein in the technique, a method for removing the enteromorpha is required to be provided. The method is provided with a round haul seine work ship and a netting gear, and is characterized in that the length (meter) of a round haul seine is approximately equal to the power (KW) of the work ship multiplied by 0.36; the middle part of the round haul seine is provided with a cod end; a float line of the round haul seine adopts a light cable with the material specific gravity of about 1, a ground rope uses an iron chain, and the length ratio of the float line to the ground rope is 1:0.98; and the work ship provided with the round haul seine adopts against current operation, and the towing speed is 1.5 to 2.0 sections. The method is suitable for removing the enteromorpha on the offshore surface layer water surfaces.

Description

Method for removing enteromorpha from round haul seines on surface layers of two ships

Technical field:

The present invention relates to enclose trawlnet and remove water surface Enteromorpha technology with the double boat surface layer.

Background technology

The Enteromorpha of removing at present top layer, the coastal waters water surface generally adopts containment boom, block and ship to choose net etc. and tackles and salvage.Containment boom, block and ship are chosen net in removing the Enteromorpha process, though can play the effect of blocking collection and salvaging, but the influence that wind-engaging, stream and Enteromorpha constantly gather, Enteromorpha overflows from the upper and lower of containment boom, hurdle net in a large number, make some Enteromorphas flow to the bank, adding goes on board chooses net and is subjected to the netting gear capacity limitation, and the unit net that Enteromorpha is salvaged time output is limited, and it is lower to remove big water surface Enteromorpha effect and work efficiency.

Summary of the invention

The technical issues that need to address of the present invention provide a kind of method that can enclose trawlnet (following narration abbreviation encloses trawlnet) removing Enteromorpha at the coastal waters double boat surface layer that the different capacity workboat uses.

Technical scheme of the present invention is equipped with workboat and netting gear, the power of workboat is 220KW (300 horsepowers) or 294KW (400 horsepowers), 441KW (600 horsepowers), 588KW (800 horsepowers), 735KW (1000 horsepowers), it is characterized in that workboat adopts the trawlnet that encloses of 6 meters of body height, enclose length (rice) the ≈ workboat power (KW) * 0.36 of trawlnet, 100 millimeters of mesh size; In the middle part of enclosing trawlnet 1～3 length being set is 30 meters, the keed of back of the body abdomen symmetry, symmetrical four-piece type structure, the keed back of the body or abdomen forward position are 200 orders, close by foldable ratio of joining and body net sheet 120 sighting slits, along being 75 orders, the side net forward position of keed is 100 orders, closes by foldable ratio of joining and body height 75 sighting slits behind the keed back of the body or the abdomen, the edge is 30 orders behind the keed side net, 60 millimeters of the mesh size of keed; Headline and ground rope length ratio are 1: 0.98, and enclosing the Float trawlnet guiding principle is that material proportion is about 1 lightweight hawser, and ground rope is joined iron chains; Workboat is equipped with this trawlnet top stream operation of enclosing, towed speed 1.5～2.0 joints.

The present invention encloses trawlnet and drifts along than being 3: 1 owing to the netting gear that trawlnet combines that encloses of workboat adapted particular design, and 60% of gross buoyancy is distributed in the network interface part, and netting gear is fully bubbled through the water column, and it is bigger to overcome stormy waves, the many slightly shortcomings of just overflowing and raising to the higher plane of principle of Enteromorpha; Sinker and float produce each component in the towing of removing the Enteromorpha operation, and the vertical dimension of netting gear is given full play to, and prevent that Enteromorpha from spilling from net bottom, can tackle and collect Enteromorpha effectively, are specially adapted to remove the operation of water surface Enteromorpha; With existing containment boom, block fixation facility interception Enteromorpha and choose net with ship and salvage the sweep-out method of Enteromorpha and compare, this method not only all can be implemented initiatively operation to the Enteromorpha that floats on intensive Enteromorpha in sea and dispersion in a large number, and can become hundred times to improve removing Enteromorpha work efficiency, have the operation effectiveness of " catching all in one draft ".

Description of drawings

Fig. 1 represents is that the netting gear that Enteromorpha encloses trawlnet is always schemed;

What Fig. 1-1 represented is the side net of keed.

What Fig. 2 represented is the netting gear assembly drowing that Enteromorpha encloses trawlnet.

What Fig. 3 represented is to enclose the scheme drawing that drags the operation incipient stage.

Fig. 4 represents is to enclose the scheme drawing that Enteromorpha in the trawlnet gathers operation.

What Fig. 5 represented is the Enteromorpha scheme drawing that lifts by crane, unloads in the fortune keed.

The specific embodiment

Be example with the used trawlnet that encloses of 441KW workboat below, accompanying drawings the specific embodiment of the present invention: the order that encloses trawlnet that this method is equipped with is big 100 millimeters, height order number is 75 orders, 25, the 50 expression body height order numbers that marked in the scale line of the left side among Fig. 1, Fig. 2; Several 25, the 50 cooresponding netting lengths of body height order are respectively 2.5 meters, 5.0 meters, and its vertical hanging ratio is 0.80; (expression is made up of 5 stitchings among Fig. 2 for (net sheet upper lateral marks among Fig. 1) 2500 orders to determine to enclose trawlnet length order number by the Power x 0.36 of workboat, every length of a film 500 orders), enclosing the horizontal hanging ratio of trawlnet is 0.64, the 1-3 (Fig. 1, Fig. 2) of body two ends (position that promptly is equivalent to wing under the trawlnet) mark is the cutting slope, and its hypotenuse hanging ratio is 1.85.

Fig. 1 represents to adorn 3 keeds in the middle of the body, and the order of keed net sheet is big 60 millimeters, and keed length order number is 500,30 meters of netting lengths; Keed is sewed up by four net sheets of back of the body abdomen [(1) among Fig. 1] symmetry, left and right sides net [(2) among Fig. 1-1] symmetry and is constituted, and the 8-1 among Fig. 1 is the back of the body or abdomen (1) the cutting slope of keed; 14-1 among Fig. 1-1 is keed side net (a 2) cutting slope; The net sheet material is a polyethylene; The keed back of the body or abdomen (1) forward position are that 200 orders and body net sheet 120 order meshes are sewed up by the foldable ratio of joining, the order number on the keed back of the body or edge, abdomen (1) back is 75 orders, the order number in keed side net (2) forward position is that 75 orders of 100 orders and body net sheet short transverse are sewed up by foldable ratio of joining and body net sheet, and the order number on edge, keed side net (2) back is 30 orders.

Headline polyethylene and polypropylene blending rope, φ 24mm, length is 160 meters; Ground rope φ 18mm steel rope, length is 156.8 meters, the sinker iron chains of φ 12mm, length is 156.8 meters; The side guiding principle adopts φ 18mm polyethylene rope, 6 meters of length.

The workboat that trawlnet is enclosed in outfit arrives at the floating sea area Hou Ding of Enteromorpha and banishes net, and two ship spacings are about 250 meters, and towing speed is about about 1.8 joints; When Enteromorpha drags when collecting a certain amount of, two ships progressively reduce the distance, and towing speed is about about 1.5 joints; When Enteromorpha gathers in the keed when a certain amount of, two ships are shut down top stream hauling, are sling behind the keed by drag operation ship or barge, and the Enteromorpha that the pull drawline will gather in the keed is discharged into cabin.Through evidence, every group job per hour can be removed 20～100 tons of Enteromorphas to ship, reaches rapidly and efficiently to remove the effect that floats on the sea Enteromorpha.

Claims

1. the double boat surface layer encloses trawlnet removing sea sedge method, be equipped with workboat and netting gear, the power of workboat is 300 horsepowers or 400 horsepowers, 600 horsepowers, 800 horsepowers, 1000 horsepowers, it is characterized in that workboat adopts the trawlnet that encloses of 6 meters of body height, enclose numerical value * 0.36 of numerical value ≈ workboat power of the length of trawlnet, the unit of length of enclosing trawlnet in above-mentioned expression formula is: rice, and the unit of workboat power is: KW, 100 millimeters of mesh size; In the middle part of enclosing trawlnet 1～3 length being set is 30 meters, the keed of back of the body abdomen symmetry, symmetrical four-piece type structure, the keed back of the body or abdomen forward position are 200 orders, close by foldable ratio of joining and body net sheet 120 sighting slits, along being 75 orders, the side net forward position of keed is 100 orders, closes by foldable ratio of joining and body height 75 sighting slits behind the keed back of the body or the abdomen, the edge is 30 orders behind the keed side net, 60 millimeters of the mesh size of keed; Headline and ground rope length ratio are 1: 0.98, and enclosing the Float trawlnet guiding principle is that material proportion is about 1 lightweight hawser, and ground rope is joined iron chains; Workboat is equipped with this trawlnet top stream operation of enclosing, towed speed 1.5～2.0 joints.

2. double boat surface layer according to claim 1 encloses trawlnet and removes the sea sedge method, and it is characterized in that enclosing the Float trawlnet guiding principle is Φ 24mm, 160 meters polyethylenes of length and polypropylene blending rope, ground rope is Φ 18mm, 156.8 meters steel ropes of length, the length of iron chains is 156.8 meters, Φ 12mm.