阅读说明：本技术 一种旋转式捕捞装置及捕捞方法 (Rotary fishing device and fishing method ) 是由 徐国强 张洪亮 陈�峰 周永东 朱文斌 于 2020-06-01 设计创作，主要内容包括：本发明公开了一种旋转式捕捞装置及捕捞方法,旨在提供一种不仅有利于幼鱼释放,而且有利于提高被释放的幼鱼的存活率的海洋生物捕捞方法。旋转式捕捞装置包括浮架、转动设置在浮架上的竖向轴杆、设置在浮架上用于驱动竖向轴杆的驱动电机、设置在竖向轴杆下端的环形安装架及若干设置环形安装架上的捕捞网装置。捕捞方法依次包括以下步骤：第一,捕捞船航行至指定海域,将旋转式捕捞装置投放到海域中；第二,驱动电机工作,驱动捕捞网装置旋转,使海水和鱼通过捕捞网的网口进入捕捞网；第三,驱动电机停止工作；第四,捕捞船航行,捕捞船通过连接绳带动旋转式捕捞装置移动至下一个指定位置；第五,返回第二步,如此循环。(The invention discloses a rotary fishing device and a fishing method, and aims to provide a marine organism fishing method which is not only beneficial to releasing juvenile fishes, but also beneficial to improving the survival rate of the released juvenile fishes. The rotary fishing device comprises a floating frame, a vertical shaft rod rotatably arranged on the floating frame, a driving motor arranged on the floating frame and used for driving the vertical shaft rod, an annular mounting frame arranged at the lower end of the vertical shaft rod and a plurality of fishing net devices arranged on the annular mounting frame. The fishing method sequentially comprises the following steps: firstly, sailing a fishing boat to a designated sea area, and throwing a rotary fishing device into the sea area; secondly, driving a motor to work to drive the fishing net device to rotate, so that seawater and fish enter the fishing net through a net port of the fishing net; thirdly, the driving motor stops working; fourthly, the fishing boat sails, and the fishing boat drives the rotary fishing device to move to the next designated position through the connecting rope; fifthly, returning to the second step, and circulating in the way.)

1. A rotary fishing device is characterized by comprising a floating frame, a vertical shaft rod rotationally arranged on the floating frame, a driving motor arranged on the floating frame and used for driving the vertical shaft rod, an annular mounting frame arranged at the lower end of the vertical shaft rod and a fishing net device arranged on the annular mounting frame, wherein the fishing net device comprises a radial shaft rod arranged on the annular mounting frame and a fishing net connected to the radial shaft rod, and the radial shaft rod is distributed along the radial direction of the vertical shaft rod; the middle part of the fishing net is provided with a separation fence, the separation fence separates a net bag of the fishing net into a front net bag and a rear net bag, the front net bag is communicated with a net port of the fishing net, the rear net bag is close to the tail end of the fishing net, the separation fence is provided with a plurality of connecting channels, and the connecting channels are communicated with the front net bag and the rear net bag.

2. The rotary fishing device of claim 1, further comprising a net mouth baffle fixedly arranged on the radial shaft, wherein the net mouth baffle is horizontally distributed, the net mouth of the fishing net is provided with a net mouth support ring, the net mouth support ring is rotatably arranged on the radial shaft, and when the net mouth of the fishing net is upward, the net mouth of the fishing net is shielded by the net mouth baffle.

3. A rotary fishing device according to claim 1 or claim 2 wherein the dividing barriers comprise a plurality of parallel fence panels, the space between any two adjacent fence panels forming the connecting channel.

4. The rotary fishing device of claim 3, wherein the segregator barrier further comprises an outer frame, the outer frame is located within the fishing net, the outer frame is connected to the fishing net, and the fence panel is located within the outer frame.

5. A rotary fishing device according to claim 1 or claim 2 wherein the fishing net is cylindrical.

6. A method of fishing using a rotary fishing device as claimed in claim 2, the method comprising the steps of:

firstly, a fishing boat sails to a designated sea area, and the fishing boat is connected with a floating frame of a rotary fishing device through a connecting rope; then, the rotary fishing device is thrown into the sea area, floats on the sea through the floating frame, and is positioned in the water;

secondly, the driving motor works, the working time of the driving motor is set to be H1 hours, the driving motor drives each fishing net device to rotate through the vertical shaft rod, in the process, the fishing nets are subjected to the action of water flow resistance, and the net port support rings of the fishing nets rotate around the radial shaft rods to be vertically distributed, so that seawater and fish can enter the fishing nets through the net ports of the fishing nets;

thirdly, the driving motor stops working, and the stop working time of the driving motor is set to be H2 hours; in the process, the tail end of the fishing net falls downwards under the action of self weight, and the net mouth support ring of the fishing net rotates around the radial shaft rod to enable the net mouths of the fishing net to be distributed upwards so as to enable the net mouths of the fishing net to be shielded by the corresponding net mouth baffle plates;

fourthly, the fishing boat sails, and the fishing boat drives the rotary fishing device to move to the next designated position through the connecting rope;

fifthly, returning to the second step, and circulating in the way.

7. The fishing method according to claim 6, wherein the fishing vessel stops traveling in the second step, and the fishing vessel stops traveling in the third step.

Technical Field

The invention relates to the field of marine fishing, in particular to a rotary fishing device and a fishing method.

Background

With the increasing emphasis on fishery resources in various countries, research on fishing gear selectivity is gradually developed. At present, in selective research, the size of meshes is generally changed, juvenile fishes are released by changing the size of the meshes, and the sustainable development of fishery resources is improved; however, in both research experiments and actual fishing processes, it is found that the effect is not ideal if young fishes are simply released by changing the mesh size; the inventor finds that the current fishing generally adopts a continuous trawl fishing mode, and the shape and the size of meshes of the trawl can be changed due to the impact of water flow in the trawl fishing process, so that the trawl is not beneficial to releasing juvenile fish; and fishes and the like are greatly extruded at the tail end of the trawl due to the impact of water flow, and the young fishes are difficult to release through meshes.

Disclosure of Invention

The invention aims to provide a rotary fishing device and a fishing method which are not only beneficial to releasing juvenile fishes, but also beneficial to improving the survival rate of the released juvenile fishes.

The technical scheme of the invention is as follows:

a rotary fishing device comprises a floating frame, a vertical shaft rod rotationally arranged on the floating frame, a driving motor arranged on the floating frame and used for driving the vertical shaft rod, an annular mounting frame arranged at the lower end of the vertical shaft rod and a fishing net device arranged on the annular mounting frame, wherein the fishing net device comprises a radial shaft rod arranged on the annular mounting frame and a fishing net connected to the radial shaft rod, and the radial shaft rod is distributed along the radial direction of the vertical shaft rod; the middle part of the fishing net is provided with a separation fence, the separation fence separates a net bag of the fishing net into a front net bag and a rear net bag, the front net bag is communicated with a net port of the fishing net, the rear net bag is close to the tail end of the fishing net, the separation fence is provided with a plurality of connecting channels, and the connecting channels are communicated with the front net bag and the rear net bag.

The fishing method changes the traditional trawl fishing method, adopts a rotary fishing device for fishing, and adopts a rotary mode for fishing in the fishing process, specifically, a driving motor drives the fishing net device to rotate through a vertical shaft rod, so that seawater and marine organisms enter the fishing net through a net port of the fishing net, under the action of water flow, a part of fishes enter a rear net sac (fishes with the size capable of connecting the channels enter the rear net sac through the connecting channels of the separation fences under the action of the water flow), and the other part of fishes are blocked by the separation fences and left in the front net sac; so, in separately the preceding net bag and the back net bag of fish in will getting into to catch the net, avoid catching the end of the fish concentration gathering at the trawl in the net, be favorable to the juvenile fish to pass through the mesh release, simultaneously, can also reduce the juvenile fish and be extrudeed the injury, improve the survival rate of the juvenile fish of being released.

Preferably, the fishing net device further comprises a net port baffle fixedly arranged on the radial shaft rod, the net port baffle is horizontally distributed, the net port of the fishing net is provided with a net port supporting ring, the net port supporting ring is rotatably arranged on the radial shaft rod, and when the net port of the fishing net faces upwards, the net port of the fishing net is shielded by the net port baffle.

Preferably, the separation fence comprises a plurality of fence plates which are parallel to each other, and the space between any two adjacent fence plates forms the connecting channel.

Preferably, the separation fence further comprises an outer frame, the outer frame is located in the fishing net and connected with the fishing net, and the fence plate is arranged in the outer frame.

Preferably, the fishing net is cylindrical.

A fishing method utilizes a rotary fishing device to carry out fishing, and the fishing method sequentially comprises the following steps:

firstly, a fishing boat sails to a designated sea area, and the fishing boat is connected with a floating frame of a rotary fishing device through a connecting rope; then, the rotary fishing device is thrown into the sea area, floats on the sea through the floating frame, and is positioned in the water;

secondly, the driving motor works, the working time of the driving motor is set to be H1 hours, the driving motor drives each fishing net device to rotate through the vertical shaft rod, in the process, the fishing nets are subjected to the action of water flow resistance, and the net port support rings of the fishing nets rotate around the radial shaft rods to be vertically distributed, so that seawater and fish can enter the fishing nets through the net ports of the fishing nets; under the action of water flow, part of the fishes entering the fishing net enter the rear net bag through the connecting channel of the separation fence, and the other part of the fishes are left in the front net bag;

thirdly, the driving motor stops working, and the stop working time of the driving motor is set to be H2 hours; in the process, the tail end of the fishing net falls downwards under the action of self weight, and the net mouth support ring of the fishing net rotates around the radial shaft rod to enable the net mouths of the fishing net to be distributed upwards so as to enable the net mouths of the fishing net to be shielded by the corresponding net mouth baffle plates;

fourthly, the fishing boat sails, and the fishing boat drives the rotary fishing device to move to the next designated position through the connecting rope;

fifthly, returning to the second step, and circulating in the way.

The fishing method changes the fishing method of the traditional trawl, adopts the rotary fishing device to carry out fishing, adopts an intermittent rotation mode to carry out fishing in the fishing process, and because the fishing net is rotatably arranged on the radial shaft rod through the net mouth support ring at the net mouth of the fishing net, and when the net mouth of the fishing net is upward, the net mouth of the fishing net is shielded by the corresponding net mouth baffle plate; this is so:

in the second step, when the driving motor drives each catching net device to rotate through the vertical shaft rod, the catching nets are under the action of resistance in water, the net mouth support rings of the catching nets rotate around the radial shaft rods to be vertically distributed (namely, the net mouths of the catching nets are vertically distributed, and net mouth baffles are horizontally distributed), so that seawater and marine organisms can enter the catching nets through the net mouths of the catching nets, under the action of water flow, one part of fishes enter the rear net sacs (fishes with the size capable of connecting passages through the connecting passages of the separation fences and enter the rear net sacs under the action of water flow), and the other part of fishes are blocked by the separation fences and left in the front net sacs to realize the catching of the marine organisms;

in the third step, the annular mounting frame and the fishing net device stop rotating by stopping the driving motor, the tail end of the fishing net falls down under the action of self weight, and the net mouth support ring of the fishing net rotates around the radial shaft rod to enable the net mouths of the fishing net to be distributed upwards so that the net mouths of the fishing net are shielded by the corresponding net mouth baffle plates; the fishing net stops rotating, and the net mouth baffle shields the net mouth of the fishing net, so that a large number of fishes in the fishing net cannot be impacted by water flow in the process, are extruded at the tail end of the trawl and can freely move in the fishing net, therefore, juvenile fishes can be released through the net holes of the fishing net, and the juvenile fishes are not extruded for a long time, so that the injury of extrusion of the juvenile fishes can be reduced, and the survival rate of the released juvenile fishes is improved; meanwhile, as the net mouth baffle blocks the net mouth of the fishing net, the grown fishes and other fishes with larger size are still continuously left in the fishing net.

Preferably, in the second step, the fishing boat stops sailing, and in the third step, the fishing boat stops sailing.

The invention has the beneficial effects that: not only is beneficial to the release of the juvenile fish, but also is beneficial to improving the survival rate of the released juvenile fish.

Drawings

FIG. 1 is a schematic view showing a structure of a rotary fishing device of the present invention.

Fig. 2 is a view from a in fig. 1.

FIG. 3 is a partial structural view of the rotary fishing device of the present invention during the operation of the driving motor.

In the figure:

a floating frame 1;

a vertical shaft 2;

a drive motor 3;

an annular mounting frame 4;

the fishing net device 5, fishing net 5.1, radial axostylus axostyle 5.2, net gape baffle 5.3, net gape support ring 5.4.

One aspect of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present scheme, and are not construed as limiting the scheme of the present invention.

These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.

In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.