CN219844659U - Trawl fishing device - Google Patents

Abstract

The utility model discloses a trawl fishing device, which belongs to the field of fishing gear equipment and comprises a trawl, wherein a first partition grid is horizontally arranged in the middle of the trawl, and a second partition grid is obliquely arranged on one side, far away from a trawl port, of the trawl, which is clung to the first partition grid; the grid bars of the first partition grid are arranged transversely along the trawl, and the grid bars of the second partition grid are arranged longitudinally along the trawl. The fishing net can effectively screen out byproducts in fishery, especially snail and catching species, so that higher catching rate is realized, catching income is improved, environmental friendliness is achieved, and the survival rate of released and catching organisms is improved.

Description

Trawl fishing device

Technical Field

The utility model relates to an aquatic fishing gear, in particular to a trawl fishing device.

Background

In the fishing process of the fish catch, the snails such as the vortex snails are common and catch types, the existing fishing gear isolating device has more separation of fishes and shrimps, is less in application of the device for separating the snails, has low economic value and difficult sorting in the fishing process, and needs to be a fishing gear capable of rejecting the snails.

For example: chinese patent bulletin No. CN108575924A, bulletin day of 2018, 9 months and 28 days, the name of the utility model is a shrimp trawl net selective device; the application discloses a fishing tackle device, including copper net clothing, guide net, horizontal separation bars and vertical separation bars, escape, copper net clothing tail end connection net bag, guide net are located inside the copper net clothing, this scheme can realize the separation between the seed and the seed to vice article that obtains, but he can't be effectual in the separation out fishing net with spiral shell class such as spiral shell especially wide mouthful spiral shell, can remain most spiral shell between horizontal separation bars and vertical separation bars.

Disclosure of Invention

The trawl fishing device solves the problem that the existing fishing gear equipment cannot effectively separate the snails such as the vortex snails into the fishing gear, and the trawl fishing device can perform secondary separation on the snails such as the vortex snails, improves the separation rate of the snails such as the vortex snails and improves the fishing efficiency.

In order to solve the technical problems, the utility model adopts the following technical scheme: the trawl fishing device comprises a trawl, wherein a first partition grid is horizontally arranged in the middle of the trawl, and a second partition grid is obliquely arranged on one side, far away from a trawl port, of the first partition grid in a close contact manner; the grid bars of the first partition grid are arranged transversely along the trawl, and the grid bars of the second partition grid are arranged longitudinally along the trawl. The first separation grid and the second separation grid are arranged in the middle of the trawl and used for removing the captured snails; the caught snails can reach the first separation grid at first, and because the grid bars of the first separation grid are transversely distributed, when the snails pass through the first separation grid, grid openings formed by every two adjacent grid bars of the first separation grid have the opportunity to separate the snails from the trawl, the second separation grid is closely attached to the first separation grid, the separation efficiency is improved, meanwhile, the second separation grid is obliquely arranged, a guiding effect is provided for a large fish, the large fish can enter the trawl along the second separation grid, the second separation grid bars are along the length direction of the trawl, and small fish and small shrimp can escape from the grid openings of the second separation grid. The scheme can remove the snails and simultaneously release some small fish and shrimp species, and has environmental friendliness.

Preferably, the inclination angle of the second partition grating is between 40 degrees and 50 degrees, and the height of the second partition grating is 0.5 to 0.6 times of the trawl diameter. The inclination angle of the second separation grating has higher separation efficiency of the snails at 40-50 degrees, the height of the second separation grating is not less than 0.5 times of trawl diameter, the second separation grating can play a blocking role on most small fish and shrimp and snails, so that the small fish and shrimp snails can naturally escape from the grating openings of the second separation grating, the height of the second separation grating is not more than 0.6 times of trawl diameter, the height of the second separation grating cannot be too high, and the too high can prevent large fish from entering the trawl, even part of large fish cannot enter the trawl.

Preferably, the first and second barrier ribs have a gate pitch of 35 to 40mm. When the grid spacing is between 35 and 40mm, most of the snails are removed, and the large fish can be ensured to stay in the trawl.

Preferably, the trawl comprises a net mouth, a guide net is arranged in the net mouth, the guide net comprises an input port and an output port, and the diameter of the guide net gradually decreases from the input port to the output port. The net mouth of the trawl is provided with the guide net, the fish catch can be guided into the trawl, the caliber of the guide net is gradually reduced from the input port to the output port, and the density of the fish catch at the output port can be improved.

Preferably, the net mouth is fixedly connected with two towing ropes, and the joint of the towing ropes and the net mouth is provided with a net plate. The trawl rope plays a role in traction on the trawl, and the net plate is arranged at the net opening, so that the net plate can provide horizontal expansion force, the area of the net opening is larger, and the fishing efficiency can be improved.

Preferably, the input port of the guide net is fixed with an acoustic wave generator through a fixing piece. The sound wave generator is fixed in front of the input port of the guide net and is also positioned at the net mouth of the trawl, so that the sound wave generator can induce fish to swim towards the net mouth, and the fishing efficiency is improved.

Preferably, the output port of the guide net is located at the position of the first separation grid. The output port of the guide net is high in density of the fished objects, the fished objects can be led into the position of the first partition grid at the first time, and some snails are slow in movement and heavier in the body and inconvenient to swim, so that the fished objects can be separated from the grid opening of the first partition grid at the first time, and the separation efficiency of the snails is greatly improved.

Preferably, the trawl further comprises a net bag, and the net bag is arranged on one side of the second partition grid away from the first partition grid. When the fish catch is separated twice through the first separation grating and the second separation grating, small fish, shrimps, snails and other low-economic-value catching types are mostly removed, and the left fish catch finally enters the net bag, so that the catching efficiency is improved, and meanwhile, the sorting difficulty is also reduced.

Compared with the prior art, the utility model has the beneficial effects that: (1) can effectively separate the snail-catching species; (2) the fishing efficiency is improved, and the sorting difficulty is reduced; (3) The method is environment-friendly and environment-friendly, and improves the survival rate of the screened and captured organisms.

Drawings

FIG. 1 is a schematic diagram of the present utility model.

Fig. 2 is a schematic view of another view of the present utility model.

In the figure: 1. the device comprises a trawl, a first partition grid, a second partition grid, a net opening, a guide grid, an input port, an output port, a trawl, a screen plate, a fixing piece, an acoustic wave generator and a net bag.

Detailed Description

The technical scheme of the utility model is further specifically described below through specific embodiments and with reference to the accompanying drawings.

Examples: the trawl fishing device shown in fig. 1 to 2 comprises a trawl 1, wherein a first partition grid 2 and a second partition grid 3 are arranged in the middle of the trawl 1, the first partition grid 2 and the second partition grid 3 can separate fish and catch matters twice, larger fishes are caught, smaller fishes, shrimps and snails are automatically released, a guide net 5 is arranged on one side, close to a net opening 4 of the trawl 1, of the first partition grid 2, a captured matter entering the net opening 4 of the trawl 1 can be guided into the trawl 1 by the guide net 5, and a net bag 12 of the trawl 1 is arranged at the rear end of the second partition grid 3 and is mainly used for containing larger fishes; through this embodiment, trawl 1 can screen off the accessory substances in the fishery effectively, realizes higher fishing rate, improves the benefit of catching to environmental protection improves the survival rate of the live and catch living things concurrently.

The first separation grating 2 is positioned in the middle of the trawl 1 and horizontally arranged at the bottom of the trawl 1, the grating bars of the first separation grating 2 are transversely arranged along the trawl 1, when a fishery object reaches the middle of the trawl 1, caught snails firstly reach the first separation grating 2, and as the grating bars of the first separation grating 2 are transversely distributed, the snails can be separated from the trawl 1 by grating openings formed by every two adjacent grating bars of the first separation grating 2 when passing through the first separation grating 2, so that the snails and small fish and small shrimps can be separated for a plurality of times at the first separation grating 2 until the position of the first separation grating 2 is finished; next, a second partition grating 3 is connected with the first partition grating 2, the second partition grating 3 is obliquely arranged relative to the first partition grating 2, and the grating bars of the second partition grating 3 are longitudinally arranged along the length direction of the trawl 1, when the fish catch passes through the first partition grating 2, the obliquely arranged second partition grating 3 has a guiding effect on the large fish, so that the large fish can enter the trawl 1 along the second partition grating 3, and meanwhile, the small fish and the snails which are not separated can escape from the grating openings of the second partition grating 3, thereby realizing automatic release of the double-catch type. The inclination angle of the second separation grating 3 is between 40 degrees and 50 degrees, so that separation of the snails can be effectively realized, wherein when the inclination angle is set to be 45 degrees, the separation efficiency is optimal; the height of the second separation grating 3 is 0.5 to 0.6 times of the diameter of the trawl 1, so that a blocking effect can be achieved on most of the small fish and the snails, the small fish and the snails can naturally escape from the grating openings of the second separation grating 3, meanwhile, the height of the second separation grating 3 cannot be too high, the large fish can be prevented from entering the trawl 1 even if the large fish cannot enter the trawl 1.

The grid spacing between the first separation grid 2 and the second separation grid 3 is between 35mm and 40mm, the separation effect of the interval on the snails is optimal, more snails can be separated in a larger separation gap, and meanwhile, the size and thickness of small fish and shrimp are considered, and the grid spacing is a good size.

The trawl 1 is also internally provided with a guide net 5, the guide net 5 comprises an input port 6 and an output port 7, the input port 6 is close to the net port 4 of the trawl 1, the output port 7 is positioned above the first partition grid 2, and the caliber of the guide net 5 gradually decreases from the input port 6 to the output port 7; the guide net 5 can guide the fish into the trawl 1 and can increase the density of the fish at the outlet 7. The output port 7 of the guide net 5 has higher density of the fished objects, and can lead the fished objects to the position of the first partition grid 2 at the first time, and some snails are slow to move and heavier in the body, so that the snails can be separated from the grid port of the first partition grid 2 at the first time due to inconvenient swimming, and the separation efficiency of the snails is greatly improved.

In addition, two hauling ropes 8 are fixedly connected to the position of the net opening 4 of the hauling net 1, a net plate 9 is arranged at the position where the hauling ropes 8 are connected with the net opening 4, the hauling ropes 8 play a traction role on the hauling net 1, the net plate 9 is arranged at the position of the net opening 4, and the net plate 9 can provide horizontal expansion force, so that the area of the net opening 4 is larger, and the fishing efficiency can be improved. The trawl 1 is also internally provided with an acoustic wave generator 11 as an attracting device, the acoustic wave generator 11 is fixed in front of the input port 6 of the guide net 5 and is also positioned at the net port 4 of the trawl 1, and the acoustic wave generator 11 can attract fish to swim towards the net port 4, so that the fishing efficiency is improved; finally the caught fish will be packed into the net bag 12 at the tail of the trawl.

Claims (8)

1. The trawl fishing device is characterized by comprising a trawl, wherein a first partition grid is horizontally arranged in the middle of the trawl, and a second partition grid is obliquely arranged on one side, far away from a trawl port, of the first partition grid; the grid bars of the first partition grid are arranged transversely along the trawl, and the grid bars of the second partition grid are arranged longitudinally along the trawl.

2. A trawl fishing device according to claim 1, wherein the second partition grating is inclined at an angle of between 40 degrees and 50 degrees and the height of the second partition grating is 0.5 to 0.6 times the trawl diameter.

3. A trawl fishing apparatus according to claim 2, wherein the first and second dividing grating have a grating spacing of 35 to 40mm.

4. A trawl fishing device according to any one of claims 1 to 3, wherein the trawl comprises a mouth, a guide net is provided inside the mouth, the guide net comprises an inlet and an outlet, and the guide net diameter gradually decreases from the inlet to the outlet.

5. A trawl fishing device according to claim 4, wherein the net mouth is fixedly connected with two trawl ropes, and a net plate is arranged at the connection part of the trawl ropes and the net mouth.

6. A trawl fishing device according to claim 4, wherein the inlet of the guide net is secured with an acoustic wave generator by a securing member.

7. A trawl fishing device according to claim 4, wherein the outlet of the guide net is located at the location of the first partition grid.

8. A trawl fishing apparatus according to any one of claims 1 to 3, wherein the trawl further comprises a mesh bag disposed on a side of the second partition grid remote from the first partition grid.