Net drawing suspension arm of fishing net

Abstract

The utility model discloses a fishing net drawing lazy arm which comprises a main lazy arm and auxiliary lazy arms arranged on the two sides of the main lazy arm, the end portion of the main lazy arm and the end portions of the auxiliary lazy arms are respectively connected with an angle adjusting assembly in a rotating mode, and the angle adjusting assemblies are installed on a fixing plate in an attached mode. A linkage assembly is connected between the side wall of the main lifting arm and the side wall of the auxiliary lifting arm, audible and visual alarms are installed on the bottom face of the main lifting arm and the side wall of the auxiliary lifting arm in an attached mode, and symmetrically-arranged lug plates are fixedly welded to the bottom face of the main lifting arm and the bottom face of the auxiliary lifting arm. A linkage structure can be formed between the suspension arms, a warning signal can be sent out to warn an operator to stop operation when the distance between the suspension arms is too small, collision between the suspension arms caused by excessive adjustment is avoided, safety during net hauling in tuna fishing operation is guaranteed, large economic loss caused by safety accidents is avoided, and operation flexibility is high.

Description

Technical Field

[0001] The utility model relates to the technical field of fishing machinery, in particular to a fishing net collecting boom. Background Art

[0002] Purse seine fishing is the most efficient fishing method in modern tuna fishing, accounting for 60-70% of total tuna production. Tuna purse seine nets are typically 1,500-2,000 meters in length and 250-300 meters in height, with at least 20 sections. The wings and catcher are constructed from nylon mesh with a mesh size of 105mm for the catcher, up to 206mm for the wings, and 105mm for the side nets made of polypropylene or polyethylene. To maximize efficiency, purse seine vessels must possess excellent maneuverability to facilitate the tasks of setting the net, encircling the fish, and hauling the fish. Due to the heavy weight of tuna purse seine nets, a hydraulic crane is required for net hauling and fish collection.

[0003] Application number CN201921590909.1 discloses a rotary boom-mounted net-lifting power block. A rotary motor drives a rotating platform, which is rotatably connected to the lower end of the boom. The upper end of the boom is rotatably connected to one end of a connecting rod, which is connected to the power block via a lifting ring connector. The net-lifting operation is hydraulically controlled throughout, which not only speeds up the process but also significantly reduces the labor intensity of manual assistance and net-lifting operations, while also improving production safety and fishing efficiency.

[0004] Because tuna purse seine vessels use large nets, the netting operation spans a wide range, requiring the simultaneous use of multiple booms. When multiple booms are used, improper operation can easily cause the boom to swing too far, leading to collisions with adjacent booms. This not only damages the equipment but also disrupts tuna fishing operations, resulting in significant economic losses. Summary of the Invention

[0005] The main purpose of the utility model is to provide a fishing net collecting boom, which can form a linkage structure between multiple booms. If the distance between the booms is too small, a warning signal can be issued to alert the operator to stop the operation, thereby avoiding collision between the booms caused by excessive adjustment, ensuring the safety of tuna fishing operations when the net is raised, avoiding safety accidents that may cause large economic losses, and effectively solving the problems in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A fishing net collecting boom, comprising a main boom and auxiliary booms arranged on both sides of the main boom, wherein the ends of the main boom and the ends of the auxiliary boom are both rotatably connected to angle adjustment components, the angle adjustment components are fittedly mounted on a fixed plate, and a linkage component is connected between the side walls of the main boom and the side walls of the auxiliary boom;

[0008] The bottom surface of the main boom and the side wall of the auxiliary boom are both fitted with sound and light alarms, and the bottom surfaces of the main boom and the auxiliary boom are both fixedly welded with symmetrically arranged ear plates.

[0009] Preferably, the linkage assembly includes a first universal joint fixed to the side wall of the main boom and a second universal joint fixed to the side wall of the auxiliary boom, a limiting sleeve is fixedly welded to the outer periphery of the rotating shaft of the first universal joint, and a through rod is welded to the outer periphery of the rotating shaft of the second universal joint, the end of the through rod extends into the limiting sleeve, and a linkage block fixedly connected to the end of the through rod is movably arranged in the limiting sleeve, a blind hole is provided on the inner bottom surface of the limiting sleeve, a sliding rod is slidingly provided in the blind hole, the outer end of the sliding rod extends out of the blind hole and a movable plate is provided at the end, a reset spring is provided between the sliding rod and the bottom of the blind hole, an elastic press switch is provided on the side of the movable plate away from the sliding rod, and the elastic press switch is electrically connected to the sound and light alarm.

[0010] Preferably, the angle adjustment assembly includes a limit frame, a convex plate is welded and fixed to the outer wall of the limit frame, the convex plate is rotatably set between parallel semicircular plates, the semicircular plates are welded and fixed to the side walls of the fixed plates, and also includes several electric winches, the ends of the steel wire ropes wound on the electric winches are respectively connected to the surface or both sides of the main boom or the auxiliary boom.

[0011] Preferably, the side wall of the fixing plate is configured with bolt through holes, and the bolt through holes are distributed in a rectangular array.

[0012] Preferably, the top cross-section of the limiting frame is U-shaped, and the top outer wall of the limiting frame is integrally formed with a rectangular protrusion.

[0013] Preferably, the electric winch is fixedly installed on the inner side of the fixing frame.

[0014] Preferably, a high-strength shaft penetrating the main boom or the auxiliary boom is rotatably mounted between the tops of the limiting frames.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The fishing net's hauling boom, through the provided linkage assembly, can form a linkage structure between the main boom and the auxiliary boom. When the angle of the main boom or the auxiliary boom changes and is adjusted, the distance between the main boom and the auxiliary boom can be adapted to the change. When the distance between the main boom and the auxiliary boom is about to fall below the safe distance and a collision occurs, the through rod drives the linkage block to approach the bottom surface of the inner limit sleeve. When the linkage block contacts the elastic press switch, a warning signal is promptly issued to warn the operator to stop the operation, thereby avoiding excessive adjustment that may cause a collision between the main boom and the auxiliary boom. This ensures the safety of tuna purse seine fishing and avoids safety accidents that may cause significant economic losses.

[0017] 2. The net-collecting boom of the fishing net can be independently controlled to flip up and down and move left and right horizontally through the angle adjustment component when the main boom and auxiliary boom are used to perform the net-collecting operation. It has high operational flexibility and can effectively improve the flexibility of tuna purse seine fishing when the net is collected. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic structural diagram of the limiting frame in the utility model;

[0020] Figure 3 It is a cross-sectional view of the linkage assembly in the present utility model;

[0021] Figure 4 for Figure 1 A magnified view of the structure at center A;

[0022] Figure 5 This is a structural diagram of Example 2.

[0023] In the figure: 1. Main boom; 2. Auxiliary boom; 3. Linkage assembly; 31. First universal joint; 32. Limit sleeve; 33. Blind hole; 331. Return spring; 332. Position sensor; 34. Sliding rod; 341. Movable plate; 342. Elastic push switch; 35. Linkage block; 36. Through rod; 37. Second universal joint; 4. Ear plate; 5. Sound and light alarm; 6. Limit frame; 7. Electric winch; 8. Convex plate; 9. Semicircular plate; 10. Fixed plate; 11. Fixed frame. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods. Example 1

[0025] like Figure 1-4As shown, a fishing net collecting boom comprises a main boom 1 and auxiliary booms 2 provided on both sides of the main boom 1. The ends of the main boom 1 and the ends of the auxiliary boom 2 are both rotatably connected to angle adjustment components, which are fitted on a fixed plate 10. A linkage component 3 is connected between the side walls of the main boom 1 and the side walls of the auxiliary boom 2.

[0026] The angle adjustment component is used to control and change the lifting angle and horizontal angle of the corresponding main boom 1 or auxiliary boom 2, so as to improve the flexibility when hauling the net in tuna fishing operations. The linkage component 3 is used to form a linkage structure between the main boom 1 and the auxiliary boom 2, and to issue a warning when the distance between the main boom 1 and the auxiliary boom 2 is small enough that a collision will occur if the angle change is continued.

[0027] Sound and light alarms 5 are fitted on the bottom surface of the main boom 1 and the side walls of the auxiliary boom 2. Symmetrically arranged ear plates 4 are fixedly welded to the bottom surfaces of the main boom 1 and the auxiliary boom 2.

[0028] After the sound and light alarm 5 is powered on, it can emit a rapid alarm sound and flash continuously. A waterproof battery is installed on the bottom surface of the main boom 1 and the auxiliary boom 2 as the power supply of the sound and light alarm 5.

[0029] Furthermore, the linkage assembly 3 includes a first universal joint 31 fixed to the side wall of the main boom 1 and a second universal joint 37 fixed to the side wall of the auxiliary boom 2, the outer periphery of the rotating shaft of the first universal joint 31 is fixedly welded with a limiting sleeve 32, and the outer periphery of the rotating shaft of the second universal joint 37 is welded and fixed with a through rod 36, the end of the through rod 36 extends into the limiting sleeve 32, and a linkage block 35 fixedly connected to the end of the through rod 36 is movably provided in the limiting sleeve 32, the inner bottom surface of the limiting sleeve 32 is provided with a blind hole 33, a sliding rod 34 is slidably provided in the blind hole 33, the outer end of the sliding rod 34 extends out of the blind hole 33 and a movable plate 341 is provided at the end, a return spring 331 is provided between the sliding rod 34 and the bottom of the blind hole 33, and an elastic press switch 342 is provided on the side of the movable plate 341 away from the sliding rod 34, and the elastic press switch 342 is electrically connected to the sound and light alarm 5.

[0030] The elastic press switch 342 is electrically connected to the battery. The elastic press switch 342 has an on state when being contacted and pressed and an off state after rebounding. The above connection method is the existing technology (refer to the existing patent CN201920831952.6).

[0031] When the adjacent main boom 1 and auxiliary boom 2 are close to each other due to angle adjustment, the through rod 36 moves together with the linkage block 35 deep into the limit sleeve 32 until the linkage block 35 contacts the elastic press switch 342. When the elastic press switch 342 is contacted and squeezed by the linkage block 35, the circuit of the sound and light alarm 5 is connected. At this time, in order to prevent the elastic press switch 342 from being squeezed, under the action of the groove and the telescopic rod 33, the elastic press switch 342 moves into the groove. Under the action of the elastic force of the telescopic rod 33, the elastic press switch 342 can be kept in contact with the linkage block 35 at all times, and the circuit of the sound and light alarm 5 is connected.

[0032] Preferably, the cross-sections of both ends of the limiting sleeve 32 and the through rod 36 are circular, so that the through rod 36 together with the linkage block 35 can rotate freely in the limiting sleeve 32. Combined with the first universal joint 31 and the second universal joint 37, it can fully adapt to the angle changes between the main boom 1 and the auxiliary boom 2.

[0033] Furthermore, the angle adjustment assembly includes a limit frame 6, the outer wall of the limit frame 6 is welded with a convex plate 8, the convex plate 8 is rotatably set between parallel semicircular plates 9, and the semicircular plates 9 are welded and fixed to the side walls of the fixed plate 10. It also includes several electric winches 7, and the ends of the steel wire ropes wound on the electric winches 7 are respectively connected to the surface or both sides of the main boom 1 or the auxiliary boom 2.

[0034] When performing a net-lifting operation to catch fish, the electric winch 7 can be used to reel in or release the wire rope to change the angle of the corresponding main boom 1 or auxiliary boom 2. When the angle between the main boom 1 and the auxiliary boom 2 changes, the linkage assembly 3 is extended and retracted accordingly.

[0035] Furthermore, the side wall of the fixing plate 10 is configured with bolt holes, and the bolt holes are distributed in a rectangular array.

[0036] High-strength bolts are passed through the bolt holes to facilitate fixing the fixing plate 10 on the main mast of the tuna purse seine vessel.

[0037] Furthermore, the cross-section of the limiting frame 6 when viewed from above is U-shaped, and a rectangular protrusion is integrally formed on the top outer wall of the limiting frame 6 .

[0038] According to the structural design of the limiting frame 6, the ends of the main boom 1 and the auxiliary boom 2 can be easily rotated inside the limiting frame 6.

[0039] Furthermore, the electric winch 7 is fixedly installed on the inner side of the fixing frame 11 .

[0040] The electric winch 7 is conveniently fixedly mounted on the main mast through the fixing bracket 11 .

[0041] Furthermore, a high-strength shaft penetrating the main boom 1 or the auxiliary boom 2 is rotatably mounted between the tops of the limiting frames 6 .

[0042] High-strength shafts are used at the stress points of the main boom 1, the auxiliary boom 2 and the limit frame 6 to meet the structural strength design requirements.

[0043] It should be noted that the present invention is a fishing net hauling boom. A fixing plate 10 and a fixing frame 11 are pre-fixed to the main mast of a tuna purse seine vessel using high-strength bolts. A power pulley is installed between the lugs 4 at the bottom of the main boom 1 and the auxiliary boom 2. Before the net is hauled up for fishing, the electric winches 7 at the corresponding positions of the main boom 1 and the auxiliary boom 2 can be reeled in and released to change the inclination and horizontal angles of the main boom 1 and the auxiliary boom 2.

[0044] When the relative position between the main boom 1 and the auxiliary boom 2 changes and they move away from each other, the linkage block 35 slides inside the limiting sleeve 32 toward the second universal joint 37 until the linkage block 35 cannot slide anymore. At this time, the main boom 1 and the auxiliary boom 2 reach the maximum distance, and the linkage assembly 3 plays a connecting role between the main boom 1 and the auxiliary boom 2, thereby improving the stability of the main boom 1 and the auxiliary boom 2.

[0045] When they approach each other, the through rod 36 moves deep into the limiting sleeve 32, driving the linkage block 35 to move toward the telescopic rod 33. When the distance between the main boom 1 and the auxiliary boom 2 is close to the minimum distance, the linkage block 35 contacts the movable plate 341, and at the same time pushes the movable plate 33 and the sliding rod 34 to move into the blind hole 33. The reset spring is compressed 331. When the movable plate 33 moves to the position sensor 332, the position sensor 332 sends a signal to the PLC controller, starting the sound and light alarm 332, and sending out a sound and light alarm signal to prompt the operator to stop adjusting the main boom 1 and the auxiliary boom 2 to get closer to each other, so as to prevent the main boom 1 and the auxiliary boom 2 from colliding. Example 2

[0046] The second embodiment is basically the same as the first embodiment, except that Figure 5 As shown, a PLC controller is provided outside the limiting sleeve 32, and a position sensor 332 is provided between the bottom of the limiting sleeve 32 and the movable plate 341. The position sensor 332 is electrically connected to the sound and light alarm 5 through the PLC controller. The position sensor 332 and the PLC controller are both electrically connected to the battery. The above connection method is the existing technology (refer to the existing patent CN2018203866160).

[0047] When the adjacent main boom 1 and auxiliary boom 2 are close to each other due to angle adjustment, the through rod 36 moves together with the linkage block 35 into the limit sleeve 32 until the linkage block 35 contacts the movable plate 33, pushing the movable plate 33 and the slide rod 34 to move into the blind hole 33, and the reset spring is compressed 331. When the movable plate 33 moves to pass the position sensor 332, the position sensor 332 sends a signal to the PLC controller, starting the sound and light alarm 332, and sending out a sound and light alarm signal, prompting the operator to stop adjusting the main boom 1 and auxiliary boom 2 to get closer to each other, so as to prevent the main boom 1 and auxiliary boom 2 from colliding.

Claims

1. A fishing net collecting boom, characterized in that: The invention comprises a main boom (1) and auxiliary booms (2) arranged on both sides of the main boom (1), the ends of the main boom (1) and the ends of the auxiliary boom (2) are both rotatably connected to an angle adjustment component, the angle adjustment component is fitted on a fixed plate (10), and a linkage component (3) is connected between the side wall of the main boom (1) and the side wall of the auxiliary boom (2); The bottom surface of the main boom (1) and the side wall of the auxiliary boom (2) are both fitted with sound and light alarms (5), and the bottom surface of the main boom (1) and the bottom surface of the auxiliary boom (2) are both fixedly welded with symmetrically arranged ear plates (4).

2. The fishing net collecting boom according to claim 1, characterized in that: The linkage assembly (3) comprises a first universal joint (31) fixed to the side wall of the main boom (1) and a second universal joint (37) fixed to the side wall of the auxiliary boom (2), a limiting sleeve (32) is fixedly welded to the outer periphery of the rotating shaft of the first universal joint (31), and a through rod (36) is fixedly welded to the outer periphery of the rotating shaft of the second universal joint (37), the end of the through rod (36) extends into the limiting sleeve (32), and a linkage block (37) fixedly connected to the end of the through rod (36) is movably provided in the limiting sleeve (32). 5), a blind hole (33) is provided on the inner bottom surface of the limiting sleeve (32), a sliding rod (34) is slidably provided in the blind hole (33), the outer end of the sliding rod (34) extends out of the blind hole (33) and a movable plate (341) is provided at the end thereof, a return spring (331) is provided between the sliding rod (34) and the bottom of the blind hole (33), an elastic pressing switch (342) is provided on the side of the movable plate (341) away from the sliding rod (34), and the elastic pressing switch (342) is electrically connected to the sound and light alarm (5).

3. The fishing net collecting boom according to claim 1, characterized in that: The angle adjustment assembly includes a limit frame (6), the outer wall of the limit frame (6) is welded with a convex plate (8), the convex plate (8) is rotatably arranged between parallel semicircular plates (9), the semicircular plates (9) are welded and fixed to the side walls of the fixed plate (10), and also includes a plurality of electric winches (7), the ends of the steel wire ropes wound on the electric winches (7) are respectively connected to the surface or both sides of the main boom (1) or the auxiliary boom (2).

4. The fishing net collecting boom according to claim 1, characterized in that: The side wall of the fixing plate (10) is configured with bolt through holes, and the bolt through holes are distributed in a rectangular array.

5. The fishing net collecting boom according to claim 3, characterized in that: The cross-section of the limiting frame (6) is U-shaped when viewed from above, and a rectangular protrusion is integrally formed on the top outer wall of the limiting frame (6).

6. The fishing net collecting boom according to claim 3, characterized in that: The electric winch (7) is fixedly mounted on the inner side of the fixing frame (11).

7. The fishing net collecting boom according to claim 3, characterized in that: A high-strength shaft penetrating the main boom (1) or the auxiliary boom (2) is rotatably mounted between the tops of the limiting frames (6).

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