Single-ship bottom layer trawl

Abstract

The utility model discloses a single boat bottom layer trawl, which relates to the technical field of fishing tools, and comprises a net bag, a floating ball and a weighted pendant, the floating ball and the weighted pendant are arranged at the net opening of the net bag, the net bag is connected with a net plate with guiding and opening functions through a connecting rope, and a net plate used for protecting the net plate and used for protecting the net plate is arranged at the lower end of the net plate. Due to the arrangement of the small rubber circular rings and the large rubber circular rings, when the net plate is impacted by the outside, the large rubber circular rings serve as the first time to absorb impact, the sliding blocks slide in the sliding grooves to disperse the impact, the small rubber circular rings cooperatively deform to enhance the buffering effect, and after the impact is relieved, the net plate is prevented from colliding with the seabed rock. The small rubber ring recovers to the original shape and assists the large rubber ring to reset, the net plate and components thereof are effectively protected, meanwhile, damage to seabed ecology is relieved, the settling speed of the net plate is ensured by arranging the iron weighting block, the efficiency of the bottom trawl is improved, the dragging iron is fixedly installed on the net plate through the bolt, and the convenience of replacement and disassembly of the dragging iron is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fishing tools, in particular to a single-vessel bottom trawl. Background Art

[0002] Single-vessel bottom trawl fishing is a way of fishing operation towed by a fishing boat. Due to its flexible operation mode, wide range of fishing targets and strong adaptability, single-vessel bottom trawl is considered to be a fishing operation mode with relatively high efficiency in current fishery production. The otter board is an important accessory of the single-vessel bottom trawl. Because it moves in water and is affected by water flow to generate lateral force, it can make the trawl mouth open to both sides, thus increasing the fishing area of the trawl mouth. Due to the complex seabed topography, the otter board is easily damaged and deformed by long-term collision with seabed rocks.

[0003] However, most of the existing otter boards are made of iron. During the single-vessel bottom trawl operation, the otter board will directly act on the seabed, causing damage to its ecological environment. And the trawl iron, as an accessory at the bottom of the otter board, is currently mostly made of steel, which is also likely to cause a certain degree of damage to the seabed ecological environment. Summary of the Utility Model

[0004] In view of the above problems, a single-vessel bottom trawl is provided, which solves the problem that the otter board and the trawl iron are likely to damage the seabed ecological environment by setting large rubber rings.

[0005] To solve the problems of the prior art, the utility model provides a single-vessel bottom trawl, including a net bag, a float ball and a weight sinker arranged at the net mouth of the net bag. The net bag is connected with an otter board with guiding and opening functions through a connecting rope. A trawl iron is arranged at the lower end of the otter board for protecting the otter board and preventing it from colliding with seabed rocks.

[0006] Preferably, a connecting block is arranged at the lower end of the otter board, and a connecting hole is arranged on the connecting block. A connecting groove matching with the connecting block is arranged at the upper end of the trawl iron. The trawl iron is connected with the otter board through bolts and nuts.

[0007] Preferably, two fixing grooves are arranged on both sides at the lower end of the otter board. A fixing block is fixedly arranged inside the fixing groove. A weight block is arranged at the lower end of the fixing block. The two weight blocks are connected through a small rubber ring.

[0008] Preferably, a sliding groove is further arranged outside the fixing groove at the lower end of the otter board. Sliding blocks are slidably arranged inside the sliding grooves. The two sliding blocks are connected through a large rubber ring.

[0009] Preferably, the small rubber ring is arranged within the range of the large rubber ring, and the lowermost end of the small rubber ring is tangent to the inner wall of the large rubber ring.

[0010] Preferably, the material of the weight block is iron material.

[0011] The beneficial effects of the present utility model compared with the prior art are as follows:

[0012] 1. By providing a small rubber ring and a large rubber ring, when the net plate is subjected to an external impact force, the large rubber ring first contacts the impact object as a buffer layer. Due to the elasticity of the rubber, it will deform and absorb part of the impact force. At the same time, the slider connected to the large rubber ring will slide to both sides in the chute, further dispersing and alleviating the impact force. During this process, the small rubber ring is squeezed and deformed, jointly forming an elastic buffer system with the large rubber ring. When the impact force is fully absorbed and alleviated, the small rubber ring will return to its original state and exert a force on the large rubber ring, enabling the large rubber ring to quickly return to its original position and be ready to handle the next possible impact, effectively reducing the impact force when the net plate collides with obstacles such as seabed rocks during fishing operations, protecting the net plate and its connecting components from damage, and at the same time reducing the potential damage to the seabed ecological environment.

[0013] 2. By providing an iron weight, the sedimentation speed of the net plate is ensured, and the efficiency of bottom trawling operations is improved.

[0014] 3. By inserting the connecting block into the upper connecting groove, ensuring that the connecting groove completely covers the connecting hole, and then using bolts to pass through the connecting hole and tightening the nuts to fix the trawl iron, the convenience of replacing and disassembling the trawl iron is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of a single-boat bottom trawl.

[0016] Figure 2 It is a three-dimensional structural schematic diagram of a single-boat bottom trawl net plate.

[0017] Figure 3 It is a three-dimensional structural schematic diagram of a single-boat bottom trawl net plate and trawl iron.

[0018] Figure 4 It is a cross-sectional structural schematic diagram of the disk of a single-boat bottom trawl trawl iron.

[0019] Figure 5 It is a three-dimensional cross-sectional structural schematic diagram of a single-boat bottom trawl trawl iron.

[0020] The reference numerals in the figure are: 100, net bag; 101, fixing frame; 102, floating ball; 103, weight; 104, net board; 105, connecting rope; 106, pulling rope; 200, connecting block; 201, connecting hole; 202, trawl iron; 203, connecting groove; 204, bolt; 205, nut; 300, fixing groove; 301, fixing block; 302, weight block; 303, small rubber ring; 304, sliding groove; 305, slider; 306, large rubber ring. Detailed implementation manners

[0021] To further understand the features, technical means, specific purposes and functions achieved by the present utility model, the following further describes the present utility model in detail in conjunction with the accompanying drawings and specific implementation manners.

[0022] Refer to Figures 1-5 As shown, a single-boat bottom trawl includes a net bag 100, floating balls 102 and weights 103 provided at the mouth of the net bag 100. The net bag 100 is connected to a net board 104 with guiding and opening functions through a connecting rope 105. A trawl iron 202 for protecting the net board 104 from colliding with underwater rocks is provided at the lower end of the net board 104. A fixing frame 101 is provided at the mouth of the net bag 100. A plurality of floating balls 102 are evenly provided on the upper fixing frame 101, and a plurality of weights 103 are evenly provided on the lower fixing frame 101. One side of the net board 104 is connected to the net bag 100 through a connecting rope 105, and the other side is connected to the hull through a pulling rope 106. When using this single-boat bottom trawl, the crew first carefully navigates the ship to a rich fishing area determined in advance through nautical charts, satellite images and fishermen's experience. Once arrived, the entire trawling operation is carried out in full swing. First, the net bag 100 is put into the water. A combination of floating balls 102 and weights 103 is ingeniously designed at the mouth of the net bag 100. The floating balls 102 use their natural buoyancy to pull the upper edge of the net bag 100 upward, while the weights 103 use gravity to pull the lower part of the net bag 100 downward. The two work together to provide a strong vertical expansion pulling force for the net bag 100. This design ensures that the net bag 100 can quickly and stably expand in the water, forming a vast catching space. As the ship slowly moves forward, the net boards 104 begin to play their key role. They are tightly connected to the net bag 100 through tough connecting ropes 105. When the ship drags the net boards 104 forward through the pulling ropes 106, the net boards 104 not only provide the necessary horizontal expansion force for the net bag 100, but also use their own shape and weight to help the net bag 100 maintain an ideal opening angle. In this way, the mouth of the net bag 100 can be fully opened, forming a huge and almost dead-angle-free fishing net surface, greatly increasing the chance of catching fish.

[0023] Refer to Figure 3As shown, a connecting block 200 is provided at the lower end of the net plate 104. A connecting hole 201 is provided on the connecting block 200. A connecting groove 203 matching with the connecting block 200 is provided at the upper end of the drag iron 202. The drag iron 202 is connected to the net plate 104 through a bolt 204 and a nut 205. During use, the drag iron 202 is moved below the net plate 104 so that the connecting groove 203 at the upper end of the drag iron 202 is aligned with the connecting block 200 at the lower end of the net plate 104. Then the connecting block 200 is inserted into the upper connecting groove 203, and it is ensured that the connecting groove 203 completely covers the connecting hole 201. Then the bolt 204 is used to pass through the connecting hole 201, and the nut 205 is tightened to fix the drag iron 202.

[0024] See Figures 2-5 As shown, two fixing grooves 300 are provided on both sides of the lower end of the net plate 104. A fixing block 301 is fixedly provided inside the fixing groove 300. A weight 302 is provided at the lower end of the fixing block 301. The two weights 302 are connected through a small rubber ring 303. A sliding groove 304 is further provided outside the fixing groove 300 at the lower end of the net plate 104. A slider 305 is slidably provided inside each of the sliding grooves 304. The two sliders 305 are connected through a large rubber ring 306. The small rubber ring 303 is arranged within the range of the large rubber ring 306, and the lowermost end of the small rubber ring 303 is tangent to the inner wall of the large rubber ring 306. The weight 302 is made of iron material. During use, after the net plate 104 enters the water, since the weight 302 is a component made of iron material, it provides additional weight for the net plate 104, which helps to maintain the stability, sinking depth and speed of the net plate 104 during the dragging process. During the bottom trawling operation, when the net plate 104 is subjected to an external impact force (such as contacting a seabed rock), the large rubber ring 306 first contacts the impact object as a buffer layer. Due to the elasticity of the rubber, it will deform and absorb part of the impact force. At the same time, the slider 305 connected to the large rubber ring 306 will slide to both sides in the sliding groove 304 to further disperse and relieve the impact force. During this process, the small rubber ring 303 is squeezed and deformed, and together with the large rubber ring 306, it forms an elastic buffer system. When the impact force is fully absorbed and relieved, the small rubber ring 303 will return to its original state and give a force to the large rubber ring 306, which enables the large rubber ring 306 to quickly return to its original position and be ready to cope with the next possible impact.

[0025] The above-described embodiment discloses a single-vessel bottom trawl. When this trawl is in use, first, the drag iron 202 is moved under the otter board 104, aligning the connecting groove 203 at the upper end of the drag iron 202 with the connecting block 200 at the lower end of the otter board 104. Then, the connecting block 200 is inserted into the upper connecting groove 203, ensuring that the connecting groove 203 completely covers the connecting hole 201. Next, a bolt 204 is passed through the connecting hole 201, and a nut 205 is tightened to fix the drag iron 202. Then, the ship sails to the predetermined fishing area, and the net bag 100 is put into the water. After the otter board 104 enters the water, since the weight block 302, which is made of iron material, provides additional weight for the otter board 104, it helps to maintain the stability, sinking depth, and speed of the otter board 104 during the dragging process. Moreover, a combination of a float 102 and a weight 103 is ingeniously designed at the mouth of the net bag 100. The float 102 pulls the upper edge of the net bag 100 upward with its natural buoyancy, while the weight 103 pulls the lower part of the net bag 100 downward by gravity. The two work together to provide a strong vertical expansion pulling force for the net bag 100. This design ensures that the net bag 100 can quickly and stably unfold in the water, forming a vast capture space. As the ship slowly moves forward, the otter boards 104 start to play their key role. They are tightly connected to the net bag 100 through tough connecting ropes 105. When the ship drags the otter boards 104 forward through the towing rope 106, the otter boards 104 not only provide the necessary horizontal expansion force for the net bag 100 but also, with their own shape and weight, help the net bag 100 maintain an ideal opening angle. In this way, the mouth of the net bag 100 can be fully opened, forming a huge and almost dead-angle-free fishing net surface, greatly increasing the chance of catching fish. During the bottom trawl operation, when the otter board 104 is subjected to an external impact force (such as hitting a seabed rock), the large rubber ring 306 first contacts the impact object as a buffer layer. Due to the elasticity of the rubber, it will deform and absorb part of the impact force. At the same time, the slider 305 connected to the large rubber ring 306 will slide to both sides in the chute 304, further dispersing and relieving the impact force. During this process, the small rubber ring 303 is squeezed and deformed, jointly forming an elastic buffer system with the large rubber ring 306. When the impact force is fully absorbed and relieved, the small rubber ring 303 will return to its original shape and exert a force on the large rubber ring 306, enabling the large rubber ring 306 to quickly return to its original position and be ready to handle the next possible impact.

[0026] The above embodiments only represent one or several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several variations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the appended claims.

Claims

1. A single-vessel bottom trawl, comprising a net bag (100), a buoy (102) and a weighted sinker (103) provided at the net opening of the net bag (100), wherein the net bag (100) is connected to a net plate (104) having guiding and opening functions through a connecting rope (105), characterized in that: A drag iron (202) is provided at the lower end of the mesh plate (104) for protecting the mesh plate (104) and preventing it from colliding with seabed rocks.

2. A single-vessel bottom trawl according to claim 1, characterized in that: A connecting block (200) is provided at the lower end of the mesh plate (104), a connecting hole (201) is provided on the connecting block (200), a connecting groove (203) matched with the connecting block (200) is provided at the upper end of the drag iron (202), and the drag iron (202) is connected to the mesh plate (104) by means of bolts (204) and nuts (205).

3. A single-vessel bottom trawl according to claim 2, characterized in that: Two fixing grooves (300) are provided on both sides of the lower end of the mesh plate (104), a fixing block (301) is fixedly provided inside the fixing groove (300), a weight block (302) is provided at the lower end of the fixing block (301), and the two weight blocks (302) are connected via a small rubber ring (303).

4. A single-vessel bottom trawl according to claim 3, characterized in that: A sliding groove (304) is further provided on the outside of the fixing groove (300) at the lower end of the mesh plate (104), and a sliding block (305) is slidably provided inside the sliding groove (304), and the two sliding blocks (305) are connected by a large rubber ring (306).

5. A single-vessel bottom trawl according to claim 4, characterized in that: The small rubber ring (303) is arranged within the range of the large rubber ring (306), and the lowermost end of the small rubber ring (303) is tangent to the inner wall of the large rubber ring (306).

6. The single-vessel bottom trawl according to claim 3, characterized in that: The weight block (302) is made of iron material.

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