Gravity triggered quantitative trawl

Abstract

This utility model discloses a gravity-triggered quantitative trawl, including a trawl body, a sealing assembly, and a weighing module disposed at the tail end of the trawl body. The weighing module is located at the tail end of the trawl body. An escape port is opened in the middle of the trawl body. The sealing assembly is located at the escape port. The sealing assembly includes a channel cover plate and a locking pin assembly. In this utility model, a weighing module is installed at the bottom of the trawl body to weigh the catch entering the bottom of the trawl body. At the same time, an escape port is opened in the middle of the trawl body, and a channel cover plate equipped with a locking pin assembly is installed at the escape port. The weighing module and the channel cover plate are connected by a transmission rope, so that when the weighing module reaches the specified weight, the transmission rope can drive the channel cover plate to open the escape port and simultaneously close the tail end of the trawl body, ensuring that the catch caught in the trawl body is the required weight and avoiding overweight fishing.

Description

Technical Field

[0001] This utility model belongs to the technical field of marine fishery fishing tools, specifically relating to a gravity-triggered quantitative trawl. Background Technology

[0002] Currently, trawling is a fishing method that uses fishing vessels to tow bag-shaped nets, forcing the prey into the net. It can actively and flexibly trawle schools of fish. It is mainly used in marine environments, but also has applications in inland waters.

[0003] Most existing recreational fishing boat bottom trawls lack effective catch control mechanisms. During the fishing process, fishermen have difficulty monitoring and accurately controlling the catch in real time, which can easily lead to overfishing. This not only violates relevant regulations but also wastes and damages fishery resources.

[0004] Furthermore, during traditional trawls, the nets easily scrape the seabed, damaging the marine ecosystem, impacting the habitat of marine life, and reducing the quality of the catch. Moreover, traditional trawls lack the ability to screen the catch, failing to effectively protect juvenile fish resources and hindering the sustainable development of fisheries. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, this utility model provides a gravity-triggered quantitative trawl to solve technical problems such as difficulty in controlling the weight of fish caught in the trawl, difficulty in screening the size of the fish, and the trawl being prone to scraping against the seabed.

[0006] To achieve the above objectives, the specific technical solution of this utility model is as follows:

[0007] A gravity-triggered quantitative trawl includes a trawl body, a sealing assembly, and a weighing module disposed at the tail end of the trawl body. The weighing module, located at the tail end of the trawl body, is used to weigh the total weight of the fish entering the trawl body.

[0008] An escape port is provided in the middle of the trawl net body. A sealing assembly is located at the escape port. The sealing assembly includes a channel cover plate and a locking pin assembly. One edge of the channel cover plate is rotatably connected to the edge of the escape port. The locking pin assembly is installed on the channel cover plate to fix the channel cover plate at the escape port, forming a closure of the escape port. A drive rope is provided between the weighing module and the locking pin assembly. The drive rope can gradually pull the locking pin assembly when the weighing module is under load, thus unlocking it. Driven by the drive rope, the channel cover plate flips downward to an inclined state, forming a closure at the tail end of the trawl net body.

[0009] Furthermore, the sealing assembly also includes a cover plate slot seat. The cover plate slot seat has a frame structure, and its inner ring has a limiting slot that cooperates with the channel cover plate to limit the extreme position of the channel cover plate's inward flipping movement.

[0010] Furthermore, the weighing module includes a weighing component and a state switching component. The weighing component includes a weighing tray and multiple elastic components. Each elastic component is located at one of the four corners of the weighing tray, and can compress when the weighing tray is subjected to pressure from the catch for weighing, and elastically return to its original position after the catch is removed. The state switching component is installed at the bottom of the weighing tray, and can gradually pull the transmission rope when the weighing tray is subjected to pressure from the catch for weighing.

[0011] Furthermore, the elastic components include a pressure calibration spring and spring guide posts. The elastic guide posts in each elastic component are fixed at the four corners of the weighing tray. The pressure calibration spring is sleeved on the outer ring of the spring guide post, and its outer end is connected to the trawl body.

[0012] Furthermore, the state switching component includes a support base, a pressure transmission rack, a transmission gear, and a rope winding shaft. The support base is fixed to the trawl body and can move relative to the weighing tray when it is under pressure. The pressure transmission rack is slidably connected to the support base, and its top end is fixedly connected to the weighing tray. The transmission gear is rotatably connected to the support base and meshes with the pressure transmission rack. The rope winding shaft is fixed to the shaft of the transmission gear. One end of the transmission rope is wound around the rope winding shaft, and the other end is connected to the locking pin assembly.

[0013] Furthermore, the locking pin assembly includes a positioning pin, a pin base, a pin socket, and a locking spring. The pin base and pin socket are respectively fixed to the edges of the escape opening of the channel cover and the trawl body. A connector is provided on the pin base. The positioning pin is slidably connected to the mounting hole on the connector. The locking spring is sleeved on the outer ring of the positioning pin, with one end connected and fixed to the outer wall of the positioning pin, and the other end abutting against the connector.

[0014] Furthermore, the trawl net body is equipped with a fixed pulley. The top of the drive rope passes over the fixed pulley and connects to the positioning pin. The fixed pulley enables the drive rope to pull the positioning pin in a direction parallel to the axis of the pin's insertion.

[0015] Furthermore, a separating lifting wing module is provided between the channel cover and the weighing tray. This module includes a lifting guide vane, a return spring, and a vane frame. The outer ring of the vane frame is fixedly connected to the trawl body. The lifting guide vane is installed within the inner frame of the vane frame, and its top edge is rotatably connected to the top edge of the vane frame. Both ends of the return spring are fixedly connected to the middle of the lifting guide vane and the upper frame edge of the vane frame, respectively.

[0016] Furthermore, the main body of the trawl net between the channel cover and the lift guide vane is made of large-diameter mesh netting.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. This utility model incorporates a weighing module at the bottom of the trawl body to weigh the catch entering the bottom of the trawl body. Simultaneously, an escape port is opened in the middle of the trawl body, and a channel cover equipped with a locking pin assembly is installed at the escape port. The weighing module and the channel cover are connected by a drive rope, so that when the weighing module reaches the specified weight, the drive rope drives the channel cover to open the escape port and simultaneously close the tail end of the trawl body, ensuring that the catch caught in the trawl body is the required weight and preventing overweight fishing.

[0019] 2. This utility model provides an openable and closable separating lifting wing module between the channel cover and the weighing tray; the lifting guide wing plate in the separating lifting wing module is rotatably connected to the wing plate frame and is connected by a return spring; the lifting guide wing plate is inclined downward, which can generate some lift when impacted by water flow and drive the trawl body to float appropriately, thereby avoiding damage to the seabed ecology and the quality of the catch caused by the trawl body scraping the seabed.

[0020] 3. This utility model replaces the main body of the trawl net between the channel cover and the lifting guide plate with a large-diameter mesh net, so that when the target catch enters, it cannot escape from the large mesh and will crash into the lifting guide plate with the water flow. Because the target catch is relatively heavy, it can break open the lifting guide plate. After the catch passes through, the lifting guide plate is reset by the tension spring. When juvenile fish enter, they are not heavy enough to break open the lifting guide plate and can escape from the large mesh, thus achieving effective screening of catches of different sizes.

[0021] 4. This utility model incorporates multiple flexible interception strips on the channel cover. Each interception strip is made of rubber and arranged in a matrix array. When soft debris from the seabed, such as discarded netting and plastic bags, enters the trawl net body while the channel cover is closed, it will be entangled by the flexible interception strips. The flexible interception strips increase the friction between the channel cover and the soft debris, thereby achieving the collection of soft debris from the seabed. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram showing the relative positions of the channel cover and the weighing assembly in this utility model;

[0024] Figure 3 This is a schematic diagram of the weighing component in this utility model;

[0025] Figure 4 This is a schematic diagram of the state switching component in this utility model;

[0026] Figure 5 This is a schematic diagram of the sealing component in this utility model;

[0027] Figure 6 This is a schematic diagram of the locking pin assembly in this utility model;

[0028] Figure 7 This is a structural schematic diagram of the separated lifting wing module in this utility model.

[0029] Reference numerals: 1. Trawl net body; 2. Weighing assembly; 201. Weighing tray; 202. Spring guide post; 203. Pressure calibration spring; 3. State switching assembly; 301. Support base; 302. Pressure transmission rack; 303. Transmission gear; 4. Sealing assembly; 401. Channel cover; 402. Cover slot seat; 403. Flexible interception strip; 5. Separating lifting wing module; 501. Lifting guide wing plate; 502. Reset spring; 503. Wing plate frame; 601. Positioning pin; 602. Pin socket; 603. Locking spring; 604. Pin base; 8. Transmission rope; 9. Large-diameter mesh netting; 10. Fixed pulley. Detailed Implementation

[0030] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper side", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] The present invention will be further described below with reference to the accompanying drawings.

[0032] like Figure 1 and 2 As shown, a gravity-triggered quantitative trawl includes a trawl body 1, a sealing assembly 4, and a weighing module located at the tail end of the trawl body 1. The weighing module, located at the tail end of the trawl body 1, is used to weigh the total weight of the fish entering the trawl body 1. The trawl body 1 is divided into an entry section, a diversion section, and a capture section from the outside in. The capture section is used to collect the catch entering the trawl body 1. An escape port is provided on the diversion section. The sealing assembly 4 is located at the escape port.

[0033] The sealing assembly 4 includes a channel cover plate 401 and a locking pin assembly. One edge of the channel cover plate 401 is rotatably connected to the edge of the escape port. The locking pin assembly is mounted on the channel cover plate 401 to secure it to the escape port. A drive rope 8 is provided between the weighing module and the locking pin assembly. The drive rope 8 can gradually pull the locking pin assembly when the weighing module is under load, thus unlocking it.

[0034] The channel cover 401 has two states under the drive of the transmission rope 8 and the locking pin assembly: a capture state and a blocking state. When the channel cover 401 is in the capture state, it is fixed to the escape port by the locking pin assembly, thus sealing the escape port. Simultaneously, the outer opening of the capture section is open, allowing fish to enter and be captured. When the channel cover 401 is in the blocking state, the weighing module releases the locking pin assembly, allowing the channel cover 401 to flip downwards, opening the escape port while simultaneously sealing the outer opening of the capture section. This ensures that fish entering the trawl body 1 are guided by the seawater and the blocking assembly 4 to exit through the escape port, preventing overfishing in the trawl body 1.

[0035] Furthermore, such as Figure 2 As shown, when the channel cover 401 is switched to the blocking state, the channel cover 401 flips down to the tilted state to block excessive catches from entering the deep part of the trawl body 1. At the same time, it can form a guide channel with the inner net of the diversion end of the trawl body 1 to guide the catches to swim and be output to the escape port side.

[0036] like Figure 2 and 5 As shown, the surface of the channel cover 401 is provided with multiple flexible interception strips 403. Each interception strip is made of rubber and arranged in a matrix array. When soft debris from the seabed, such as discarded netting and plastic bags, enters the trawl body 1 while the channel cover 401 is in the blocked state, it will be entangled by the flexible interception strips 403. The flexible interception strips 403 increase the friction between the channel cover 401 and the soft debris from the seabed, thereby achieving the collection of soft debris from the seabed.

[0037] In some embodiments, the sealing assembly 4 further includes a cover plate slot 402. The cover plate slot 402 has a frame structure, and its inner ring has a limiting slot that cooperates with the channel cover 401 to limit the extreme position of the channel cover 401 inward flipping movement.

[0038] like Figure 3The weighing module includes a weighing component 2 and a state switching component 3. The weighing component 2 includes a weighing tray 201 and multiple elastic components. Each elastic component is located at one of the four corners of the weighing tray 201, and can compress when the weighing tray 201 is subjected to pressure from the catch, and elastically return to its original position after the catch is removed. The state switching component 3 is installed at the bottom of the weighing tray 201, and can gradually pull the transmission rope 8 when the weighing tray 201 is subjected to pressure from the catch. The outer end of the transmission rope 8 is connected to a locking pin assembly, used to unlock the locking pin assembly, thereby realizing the state switching of the channel cover 401.

[0039] like Figure 3 and 4 As shown, the state switching component 3 includes a support base 301, a pressure transmission rack 302, a transmission gear 303, and a rope winding shaft. The support base 301 is fixed to the trawl body 1 and can move relative to the weighing tray 201 when it is under pressure. The support base 301 has a slide groove that engages with the pressure transmission rack 302. The pressure transmission rack 302 is slidably connected to the slide groove, and its top end is fixedly connected to the weighing tray 201, allowing it to slide down when the weighing tray 201 is under pressure. The transmission gear 303 is rotatably connected to the support base 301 and meshes with the pressure transmission rack 302. The rope winding shaft is fixed to the shaft of the transmission gear 303. One end of the transmission rope 8 is wound around the rope winding shaft, and the other end is connected to the locking pin assembly.

[0040] In actual use, when the pressure transmission rack 302 moves downward under the drive of the weighing tray 201, it will drive the transmission gear 303 to rotate. During the rotation of the transmission gear 303, it will drive the tension winding shaft to rotate synchronously, thereby gradually winding up the transmission pull rope 8. The locking pin assembly gradually disengages during the winding of the transmission pull rope 8, thus unlocking. The channel cover 401 switches from the capturing state to the blocking state under the drive of the transmission pull rope 8.

[0041] In this embodiment, the elastic components include a pressure calibration spring 203 and spring guide posts 202. The elastic guide posts in each elastic component are fixed at the four corners of the weighing tray 201. The pressure calibration spring 203 is sleeved on the outer ring of the spring guide posts 202, and its outer end is connected to the trawl body 1. In use, a pressure calibration spring 203 with an appropriate compression length is selected according to the set 20kg catch weight threshold, so that when the catch in the trawl body 1 reaches 20kg, the pressure calibration spring 203 will be compressed to its limit position, that is, the weighing tray 201 will move to its limit position.

[0042] like Figure 6As shown, the locking pin assembly includes a positioning pin 601, a pin base 604, a pin socket 602, and a locking spring 603. The pin base 604 and pin socket 602 are respectively fixed to the edges of the escape opening of the channel cover plate 401 and the trawl body 1. The pin base 604 has two connecting parts that mate with the positioning pin 601. The positioning pin 601 is slidably connected to the mounting holes on the connecting parts. The locking spring 603 is sleeved on the outer ring of the positioning pin 601, with one end connected and fixed to the outer wall of the positioning pin 601, and the other end abutting against one of the connecting parts.

[0043] In the initial state, the locating pin 601, pushed by the locking spring 603, engages with the pin socket 602 at its outer end, locking the passage cover 401 at the escape port. When the locating pin 601 is pulled by the transmission rope 8, its outer end gradually disengages from the pin socket 602. Simultaneously, the locking spring 603 gradually compresses and deforms. When the locating pin 601 disengages from the pin socket 602 and the locking spring 603 reaches its limit of compression, the locating pin 601 is still under the tension of the transmission rope 8, causing the passage cover 401 to flip downwards.

[0044] Furthermore, the main body 1 of the trawl net is equipped with a fixed pulley. The top of the drive rope 8 passes around the fixed pulley and is connected to the positioning pin 601. By changing the traction direction of the drive rope 8 through the fixed pulley, when it pulls the positioning pin 601, the direction of the pulling force is parallel to the axis of the pin socket 602, so that the positioning pin 601 can smoothly disengage from the pin socket 602.

[0045] like Figure 2 and 7 As shown, a separating lifting wing module 5 is provided between the channel cover plate 401 and the weighing tray. This module provides upward lift to the trawl body 1 when impacted by seawater, causing the trawl body 1 to float and preventing it from scraping against the seabed and causing damage. Specifically, the separating lifting wing module 5 includes a lifting guide wing plate 501, a return spring 502, and a wing plate frame 503. The outer ring of the wing plate frame 503 is fixedly connected to the trawl body 1. The lifting guide wing plate 501 is installed in the inner frame of the wing plate frame 503, and its top edge is rotatably connected to the top edge of the wing plate frame 503. The two ends of the return spring 502 are fixedly connected to the middle of the lifting guide wing plate 501 and the upper frame edge of the wing plate frame 503, respectively. When the lifting guide wing plate 501 is impacted by sea currents, it will rotate upwards around its axis, providing an upward force to the trawl body 1. Simultaneously, the return spring 502 deforms. When the ocean current ends, the lifting guide vane 501 will be reset by the return spring 502, preparing for the subsequent ascent of the trawl body 1.

[0046] In this embodiment, the trawl body 1 between the channel cover 401 and the lift guide vane 501 uses a large-mesh net 9. This allows juvenile fish, due to their insufficient weight, to break through the lift guide vane 501 and escape through the mesh of the large-mesh net 9 when the trawl body 1 catches fish. Larger fish, unable to escape through the mesh, are pushed open by the water flow and enter the capture section of the trawl body 1. Once inside, the lift guide vane 501 is reset by the elastic action of the return tension spring, thus achieving fish sorting.

[0047] The working principle of this utility model is as follows:

[0048] In the initial state, the channel cover 401 is in a capturing state, and is fixed to the escape port by a locking pin assembly, thus sealing the escape port. Simultaneously, the positioning pin 601 on the channel cover 401, pushed by the locking spring 603, engages with the pin socket 602 on the trawl body 1, locking the channel cover 401 at the escape port. In this state, the bottom opening of the trawl body 1 is open, allowing the catch to smoothly enter the bottom of the trawl body 1 and be sorted by the lifting guide vanes 501.

[0049] When juvenile fish enter the main body 1 of the trawl net, they are too light to break through the lift guide vane 501 and can escape through the mesh of the large-diameter net 9. Larger catches, unable to escape through the mesh, are pushed open by the water flow and enter the bottom of the main body 1 of the trawl net. After entering, the lift guide vane 501 is reset by the elastic action of the return tension spring, thus achieving the sorting of the catch.

[0050] As the catch continuously enters the bottom of the trawl body 1, the weighing tray 201 set at the bottom of the trawl body 1 is weighed by the pressure of the catch, creating relative movement between it and the trawl body 1. At the same time, it drives the pressure transmission rack 302 on the ground to slide on the support base 301.

[0051] When the pressure transmission rack 302 moves downward under the drive of the weighing tray 201, it will drive the transmission gear 303 to rotate. During the rotation of the transmission gear 303, it will drive the tension winding shaft to rotate synchronously, thereby realizing the gradual winding of the transmission rope 8.

[0052] The positioning pin 601 in the locking pin assembly gradually disengages during the winding of the transmission rope 8, thus unlocking the system. Driven by the transmission rope 8, the channel cover 401 switches from the capturing state to the blocking state. In the blocking state, the channel cover 401 flips downwards, opening the escape port while simultaneously sealing the outer opening of the capturing section. This allows the catch entering the trawl body 1 to be guided by the seawater and the blocking assembly 4 to exit through the escape port, preventing overfishing in the trawl body 1.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A gravity-triggered, quantitative trawl net, characterized in that: It includes a trawl net body (1), a sealing assembly (4), and a weighing module located at the tail end of the trawl net body (1); the weighing module is located at the tail end of the trawl net body (1) and is used to weigh the total weight of the fish entering the trawl net body (1); An escape port is provided in the middle of the trawl body (1); a sealing assembly (4) is provided at the escape port; the sealing assembly (4) includes a channel cover plate (401) and a locking pin assembly; one side edge of the channel cover plate (401) is rotatably connected to the edge of the escape port; the locking pin assembly is installed on the channel cover plate (401) to fix the channel cover plate (401) at the escape port, forming a closure of the escape port; a transmission pull rope (8) is provided between the weighing module and the locking pin assembly; the transmission pull rope (8) can gradually pull the locking pin assembly when the weighing module is under load, so as to unlock it; the channel cover plate (401) is flipped downward to an inclined state under the drive of the transmission pull rope (8), and forms a closure at the tail end of the trawl body (1).

2. A gravity-triggered, fixed-mesh, fixed-volume trawl according to claim 1, wherein: The sealing assembly (4) also includes a cover plate slot seat (402); the cover plate slot seat (402) has a frame structure and an inner ring with a limiting slot that cooperates with the channel cover plate (401) to limit the extreme position of the channel cover plate (401) to rotate inward.

3. A gravity-triggered, fixed-mesh, fixed-volume trawl according to claim 1, wherein: The weighing module includes a weighing component (2) and a state switching component (3); the weighing component (2) includes a weighing tray (201) and multiple elastic components; each elastic component is respectively located at the four corners of the weighing tray (201), and can be compressed when the weighing tray (201) is squeezed by the catch for weighing, and elastically reset after the catch is removed; the state switching component (3) is installed at the bottom of the weighing tray (201), and can gradually pull the transmission rope (8) when the weighing tray (201) is squeezed by the catch for weighing.

4. A gravity-triggered, fixed-mesh, fixed-volume trawl according to claim 3, wherein: The elastic components include a pressure calibration spring (203) and a spring guide post (202); the elastic guide posts in each of the elastic components are respectively fixed at the four corners of the weighing tray (201); the pressure calibration spring (203) is sleeved on the outer ring of the spring guide post (202), and its outer end is connected to the trawl body (1).

5. A gravity-triggered quantitative trawl according to claim 3, characterized in that: The state switching component (3) includes a support base (301), a pressure transmission rack (302), a transmission gear (303), and a rope winding shaft. The support base (301) is fixed on the trawl body (1) and can move relative to the weighing tray (201) when it is under pressure. The pressure transmission rack (302) is slidably connected to the support base (301) and its top end is fixedly connected to the weighing tray (201). The transmission gear (303) is rotatably connected to the support base (301) and meshes with the pressure transmission rack (302). The rope winding shaft is fixed on the shaft of the transmission gear (303). One end of the transmission rope (8) is wound around the rope winding shaft, and the other end is connected to the locking pin assembly.

6. A gravity-triggered, fixed-mesh, fixed-volume trawl according to claim 1, wherein: The locking pin assembly includes a positioning pin (601), a pin base (604), a pin socket (602), and a locking spring (603); the pin base (604) and the pin socket (602) are respectively fixed at the edge of the escape port of the channel cover plate (401) and the trawl body (1); a connector is provided on the pin base (604); the positioning pin (601) is slidably connected in the mounting hole on the connector; the locking spring (603) is sleeved on the outer ring of the positioning pin (601), and one end is connected and fixed to the outer wall of the positioning pin (601), and the other end abuts against the connector.

7. A gravity-triggered, fixed-mesh, fixed-volume trawl according to claim 6, wherein: The main body (1) of the trawl net is provided with a fixed pulley; the top of the transmission rope (8) passes around the fixed pulley and is connected to the positioning pin (601); the fixed pulley can make the traction direction of the transmission rope (8) on the positioning pin (601) parallel to the axial direction of the pin socket (602).

8. A gravity-triggered, fixed-mesh, fixed-volume trawl according to claim 3, wherein: A separating lifting wing module (5) is provided between the channel cover plate (401) and the weighing tray. The separating lifting wing module (5) includes a lifting guide wing plate (501), a return spring (502) and a wing plate frame (503). The outer ring of the wing plate frame (503) is fixedly connected to the trawl body (1). The lifting guide wing plate (501) is installed in the inner frame of the wing plate frame (503), and its top edge is rotatably connected to the top edge of the wing plate frame (503). The two ends of the return spring (502) are fixedly connected to the middle of the lifting guide wing plate (501) and the upper frame edge of the wing plate frame (503), respectively.

9. A gravity-triggered, fixed-mesh, quantitative trawl according to claim 8, characterised in that: The trawl body (1) between the channel cover plate (401) and the lifting guide vane (501) adopts a large-diameter mesh net (9).

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