CN201167523Y

CN201167523Y - Large-mesh various aqueous layer single cod end

Info

Publication number: CN201167523Y
Application number: CNU2008200192393U
Authority: CN
Inventors: 张孝先
Original assignee: RONGCHENG SHIDAO YUNTONG FISHING NET FACTORY
Current assignee: Weihai good net Gear Technology Co.,Ltd.
Priority date: 2008-03-26
Filing date: 2008-03-26
Publication date: 2008-12-24
Anticipated expiration: 2018-03-26

Abstract

The utility model discloses a single phantom trawl with big meshes and high catch efficiency and is characterized in that an odd leg wire of a net wing is connected with a net stem in a contact mode. The utility model has the advantages that firstly, the structure of the odd leg wire is adopted so as to cause a curved line of the wing edge to be smooth as well as lead the utility model to have good buffering effect, save net wires, reduce friction force of the wing edge and the hydraulic resistance and be easily repaired; secondly, the net wires at the wing edge are too thick and the thickness of the net wire is more than twice the thickness of basic net wires of main scales so as to resist the wear loss, prolong the service life, etc; thirdly, the meshes are too large with the biggest mesh reaching as big as 30m, and besides the protection of young fish resources, the trawl is fast in water filtering speed, fast in trawl speed with little resistance and the area sweeping per unit time of the trawl is multiplied; fourthly, the trawl can perform the phantom operation, which enlarges the catch space of the water areas of a middle layer and an upper layer, breaks the way that the traditional single trawl can only perform the bottom layer operation and effectively reduces the pressure of over catching of marine resources at the bottom layer and accords with the policy of national marine resources.

Description

Sparse mesh metalimnion otter-trawl

Technical field:

The utility model relates to the instrument of fishing for, the sparse mesh metalimnion otter-trawl of specifically a kind of catching rate height, long service life.

Background technology:

As everyone knows, trawlnet is to use the widest instrument of fishing for, traditional trawlnet to divide two trawlnet tools and otter-trawl tool in the marine fishing.Two trawlnet tools are to pull two of trawlnet respectively by two towboats to drag guiding principle, two trawlnet mouths are opened fish for, its deficiency be must two towboat while operation, energy utilization rate is low, most countries is forbidden pair trawling etc. in the world; The otter-trawl tool is that single ship pulls, by dividing the expansion of water plate level that network interface is opened, the two relatively trawlnets of otter-trawl tool have and protect fishery resourses, operate nimble, energy efficient, advantage such as general access in the world, but traditional otter-trawl has the following disadvantages: (1) mesh is little, drainage is slow, the mesh maximum is no more than 50cm, is unfavorable for discharging juvenile fish; Because mesh is less, the towing speed of netting gear is slow, and it is long-pending little to sweep the sea, yield poorly, maximum towing speed have only 2.5 Where/hour, can't fish for large-scale fish especially; (2) process structure complexity, body and wing are made by multi-disc net sheet and are formed, that is to say that body vertically is linked to be pyramid type by the multi-disc net along body, particularly body is in order to reach slick and sly structure, reach the most for a long time by eight, ten ettings and form by cutting out to make, body is not slick and sly, water resistance is big, expands insufficient, inefficiency, technology difficulty is very big, influences promoting the use of of otter-trawl; (3) use the object limitation big: only be applicable to bottom operation waters, the waters can only be blank at the middle and upper levels; Only be suitable for domestic operation and indivedual in the world national short-term operation, be unfavorable for the development of the deep-sea fishing worldization; (4) because the net stalk is to be intertwined and connected with being connected of wing limit, the waste netting twine, place, sleeve limit netting twine is meticulous, water resistance is big, friction is big, makes the netting gear cracky, and service life is short.

Summary of the invention:

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, provide that a kind of towing speed is fast, output is high, not fragile, can be at the sparse mesh metalimnion otter-trawl tool of different water layer operations.

The utility model can reach by following measure:

A kind of sparse mesh metalimnion otter-trawl, comprise by net capsule, body and the wing netting stalk and make by netting twine, it is characterized in that wing is connected by single payment to a porter with the net stalk, single payment to a porter can be the extension line of cuff place netting twine, also can be for setting up line, single payment to a porter adopts contact to be connected with the net stalk, the general knotting mode that adopts is connected, so that sleeve limit curve slyness, the friction of good buffer effect, saving netting twine, minimizing cuff place and water, minimizing water resistance, netting gear damage the service life of easy repairing in back and prolongation netting gear etc.

The utility model can strengthen the mesh at body and wing place, the mesh of body and wing is greater than 60cm, maximum can reach 30m, make the drainage of netting gear fast, towing speed is fast, cooperate and to carry out operation at the different water layers of upper, middle and lower with minute water plate, it is long-pending big to sweep the sea, and the output height is applicable to the power fishing boat that varies in size.

The sleeve sideline rugosity of wing of the present utility model is more than 2 times of the basic rugosity of main scale netting twine, to resistance to wear, to increase the service life etc.

Sleeve of the present utility model limit is located so that netting gear resistance to wears, to increase service life to carefully being made up of netting twine branch echelon more than 3 kinds by thick to the netting twine of net capsule, is applicable to large mesh, high towing speed operation.

Body in the utility model has changed the structure of body, vertically be linked to be pyramid type by the multi-disc net along body by original body, that is to say to change into by a plurality of cylindrical shape net sheets and be coupled to the pyramid type body by clip by the trapezoidal net sheet of multi-disc, so that body slyness, water resistance are little, expansion fully, high efficiency, towing speed height.

The utility model has the advantages of one is to adopt single payment to a porter structure; so that cuff curve slyness; good buffer effect; save netting twine; reduce the cuff friction; reduce water resistance; repair easily and increase the service life etc.; the 2nd, place, sleeve limit netting twine is thick; rugosity is more than 2 times of the basic rugosity of main scale netting twine; to resistance to wear; increase the service life etc.; the 3rd, mesh is big, and maximum can reach 30m, and towing speed is fast; the horizontal expansion of netting gear is strong; also can become the water layer operation, the expansion otter-trawl fish for space, energy savings; effectively protect marine resources, met national marine resource policy.

Description of drawings:

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the utility model half sleeve limit and the structural representation of netting stalk.

Embodiment:

Below in conjunction with accompanying drawing the utility model is further described:

As shown in the figure, a kind of sparse mesh metalimnion otter-trawl, comprise by the net capsule 4 of netting stalk 1 and making by netting twine, body 3 and wing 2, wing 2 and net stalk 1 are connected by single payment to a porter 5, single payment to a porter 5 is the extension line of sleeve limit netting twine, single payment to a porter 5 adopts contact to be connected with net stalk 1, so that sleeve limit curve slyness, good buffer effect, save netting twine, reduce sleeve limit friction, reduce water resistance, repair easily and increase the service life etc., the utility model can strengthen the mesh at body 3 and wing 2 places, the mesh of body 3 and wing 2 is greater than 60cm, maximum can reach 30m, so that the drainage of netting gear is fast, towing speed is fast, cooperate and to carry out operation at the different water layers of upper, middle and lower with minute water plate, it is long-pending big to sweep the sea, be applicable to the fishing boat that varies in size, the sleeve sideline rugosity of wing 2 of the present utility model is more than 2 times of body 3 netting twine rugosity, to resistance to wear, increase the service life etc., sleeve of the present utility model limit is located extremely carefully to be made up of netting twine branch echelon more than 3 kinds thick to the netting twine of net capsule, so that netting gear resistance to wears, increase service life, be applicable to large mesh, body in the utility model has changed the structure of former body, originally body vertically is linked to be pyramid type by the multi-disc net along body, that is to say that being linked to be pyramid type by the trapezoidal net sheet of multi-disc changes into by a plurality of cylindrical shape net sheets and be coupled to the pyramid type body by clip, so that body slyness, water resistance is little, expansion fully, high efficiency, the towing speed height, major advantage effect one of the present utility model is to adopt single payment to a porter knot contact syndeton, so that sleeve limit curve slyness, good buffer effect, save netting twine, reduce the friction of cuff and water, reduce water resistance, repair easily and increase the service life etc.; The 2nd, sleeve limit place netting twine is extraordinarily thick, and rugosity is more than 2 times of the basic netting twine rugosity of main scale, to resistance to wear, to increase the service life etc.; The 3rd, the mesh super large, maximum can reach 30m, and towing speed is fast; The 4th, can become the water layer operation, protected the demersal fishery resource of overfishing, opened up pelagic fishery fishable resources space.

Claims

1, a kind of sparse mesh metalimnion otter-trawl comprises the net stalk and by net capsule, body and wing that netting twine is made, it is characterized in that wing is provided with single payment to a porter that single payment to a porter is connected with the net stalk.

2, a kind of sparse mesh metalimnion otter-trawl according to claim 1 is characterized in that single payment to a porter is connected in the knotting mode with the net stalk.

3, a kind of sparse mesh metalimnion otter-trawl according to claim 1, the mesh that it is characterized in that body and wing place is greater than 60cm.

4, a kind of sparse mesh metalimnion otter-trawl according to claim 1, place, the limit netting twine that it is characterized in that tucking inside the sleeve is extraordinarily thick, and rugosity is more than 2 times of the basic netting twine rugosity of main scale.

5, a kind of sparse mesh metalimnion otter-trawl according to claim 1, the limit that it is characterized in that tucking inside the sleeve is located extremely carefully to be made up of netting twine branch echelon more than 3 kinds thick to the netting twine of net capsule.

6, a kind of sparse mesh metalimnion otter-trawl according to claim 1 is characterized in that body is coupled to the pyramid type body by a plurality of cylindrical shape net sheets by clip.