WO2024055393A1

WO2024055393A1 - Fishing-boat trawl net having net bag capable of being rapidly separated

Info

Publication number: WO2024055393A1
Application number: PCT/CN2022/128781
Authority: WO
Inventors: 马家志; 宋伟华; 石桂华; 谢思杰
Original assignee: 浙江海洋大学
Priority date: 2022-09-13
Filing date: 2022-10-31
Publication date: 2024-03-21
Also published as: CN116076455A

Abstract

The present invention relates to the field of fishery, and particularly relates to a fishing-boat trawl net having a net bag capable of being rapidly separated. The fishing-boat trawl net comprises a trawl-net main body and a net bag, wherein the trawl-net main body is connected to a boat, the tail of the trawl-net main body is provided with an opening, two sides of the opening at the tail of the trawl-net main body are respectively provided with an arc-shaped support rod, the net bag is arranged at the tail of the trawl-net main body, the net body of the net bag penetrates the opening at the tail of the trawl-net main body and extends outward, and an edge of a net opening of the net bag is arranged on the arc-shaped support rods in a lap-jointed manner. The fishing-boat trawl net further comprises a separation and pull-out device, which is used for independently pulling the net bag out from the trawl-net main body, wherein the separation and pull-out device comprises a traction rope, a closing mechanism and a locking mechanism. In the present application, the trawl-net main body can be independently separated by means of the net bag, such that fish in the net bag can be conveniently pulled out therefrom onto the boat, and due to the provision of the closing mechanism and the locking mechanism, the net opening of the net bag is closed more tightly when the net bag is pulled out, such that the tightness of closing of the net bag is improved, and thus it is ensured that fish are smoothly pulled out therefrom.

Description

A fishing boat trawl net with a quickly detachable net bag

Technical field

The invention relates to the field of fishery, and in particular to a fishing boat trawl net with a rapidly detachable net bag.

Background technique

The operating principle of trawling is to use ships to drag bag-type fishing nets to fish in the sea areas they pass through; there is a problem in trawl fishing, that is, long-term towing of the trawl will increase the burden on the bag and cause the bag inside the bag to be fished. The catch is squeezed and damaged, resulting in fish injury or death; multiple bags are used to fall off in sequence to reduce the towing time of each bag to alleviate this problem. However, the catch entering the trawl is not well protected Differentiation, that is, fish, shrimps, crabs, etc. regardless of size, wherever the trawl passes, are usually dragged into the net bag. The trawler drags the trawl net forward in the sea, allowing the fish to enter the net bag at the rear of the trawl net. The trawl net is usually larger. In order to To facilitate the movement of fish entering the net bag to the fishing boat, the net bag of some trawl nets is designed to be a structure that can be separated from the trawl main body. However, the current separation structure is complicated and it is usually necessary to pull the part where the net bag is combined with the trawl main body out of the water. post operation.

The currently disclosed Chinese patent CN202110143506.8 is a nested operation method for separating and detachable trawl bags, including a drag frame. The innovation is that it also includes a fixed frame, a connecting frame, a locking device, and a retraction device. Tightening device one, tightening device two, connecting frame two, locking device two, fixed ring one, fixed ring two, fine mesh bag, medium mesh bag, large mesh bag and guide ring; the left edge of the fixed frame is connected to The right end of the drag frame is fixedly connected, and several guide rings are evenly and fixedly connected to the drag frame; the connecting frame is fixedly connected to the outside of the fixed frame through several locking devices, and the outer side of the connecting frame is fixedly connected with a retractor. Tightening device one; the connecting frame two is located inside the connecting frame one, the connecting frame two is fixedly connected to the outside of the fixed frame through several locking devices two, and the tightening device two is fixedly connected to the outside of the connecting frame two; The left opening of the fine mesh bag is fixedly connected to the right edge of the connecting frame, and several fixed rings are evenly fixed on the outside of the left longitudinal section of the fine mesh bag; the middle mesh bag is located inside the fine mesh bag, so The left opening of the middle mesh bag is fixedly connected to the right edge of the connecting frame 2, and a number of fixed rings are evenly connected to the outside of the left longitudinal section of the middle mesh bag; the large mesh bag is located inside the middle mesh bag, The left opening of the large mesh bag is fixedly connected to the right opening of the fixed frame; the tightening rope on the right side of the tightening device is annularly connected in series to the corresponding fixed ring one, and the right end of the tightening rope Fixedly connected to the first fixed ring that passed through; the tightening rope on the right side of the second locking device is connected in series to the corresponding fixed ring two in a ring shape, and the right end of the tightening rope is fixedly connected to the first passed through fixed ring. On the second fixed ring; the pull ropes in the first and second locking devices are connected to the fishing boat through corresponding guide rings in sequence.

According to the above-mentioned patent, the patent designs the net bag into multiple nested net bags, and the mesh size of each net bag is different. In this way, the separation of different catch sizes can be reasonably realized and the work can be reduced. However, this method is inconvenient for the collection of net bags for personnel sorting work. Therefore, a net bag that can separate the main body of the trawl is needed.

Contents of the invention

In view of the problems existing in the current technology, a fishing boat trawl with a net bag that can be quickly separated is provided. This application uses a net bag that can separately separate the main body of the trawl, so that the fish in the net bag can be easily pulled out to the ship. And due to the settings of the closing mechanism and the locking mechanism, the mesh mouth of the net bag is more tightly closed when it is pulled out, which improves the tightness of the net bag closing and ensures that the fish can be escaped smoothly.

In order to solve the existing technical problems, the technical solutions adopted by the present invention are:

The invention provides a fishing boat trawl with a quickly detachable net bag, which includes a trawl body and a net bag; the trawl body is connected to the ship, the tail of the trawl body has an opening, and both sides of the opening of the tail of the trawl body have arc-shaped support rods ; The net bag is arranged at the tail of the trawl main body. The net body of the net bag extends outward through the tail opening of the trawl main body. The edge of the net mouth of the net bag is set up on the arc-shaped support rod; it also includes a device for removing the net bag from the trawl net. A separate pull-out device that is pulled out separately from the main body. The separate pull-out device includes a traction rope, a closing mechanism and a locking mechanism; one end of the traction rope is connected to the net bag, and the other end of the traction rope is connected to the ship; the closing mechanism and the locking mechanism The mechanisms are all arranged at the mesh opening of the net bag, the closing mechanism is connected to the traction rope, and the locking mechanism and the closing mechanism cooperate with each other.

Preferably, the closing mechanism includes an upper crossbar and a lower crossbar; the upper crossbar is fixedly provided above the mesh opening of the mesh bag; the lower crossbar is fixedly disposed below the mesh opening of the mesh bag, and the lower crossbar can face the upper crossbar. When the lower crossbar is close to the upper crossbar, the mesh port of the mesh bag is gradually closed.

Preferably, the upper part of the opening of the trawl body is provided with a guide rope connected to the ship, the end of the guide rope away from the ship is fixedly connected to the upper part of the opening of the trawl body, and the upper crossbar is provided with a guide that is slidably sleeved on the guide rope. ring.

Preferably, the edges on both sides of the mesh bag mesh opening between the upper crossbar and the lower crossbar are connected with a set of collars, each set of collars has several collars, and the collars are equally spaced, and the traction rope Pass through several collars in sequence, and the end of the traction rope that is not connected to the ship is fixedly connected to the lower crossbar.

Preferably, the lock mechanism includes a frame, movable parts and locking parts; the frame is fixedly arranged on the upper cross bar, the lower cross bar is located inside the frame, and both sides of the frame have arcs coaxial with the arc-shaped support rods. track; there are two movable parts, the two movable parts are respectively arranged in an arc-shaped track; there are two locking parts, both locking parts are set on the upper half of the frame, and each locking part is located on a movable part above; both ends of the lower crossbar are provided with fixed bars connected to corresponding movable parts; a shell for installing corresponding locking parts is provided on the frame and at the position of each locking part.

Preferably, the movable part is specifically a movable rod, the fixed bar is fixedly connected to the end of the lower cross bar, a bar-shaped opening is horizontally opened on the fixed bar, one end of the movable rod is inserted into the bar-shaped opening, and the movable rod can be inserted into the bar-shaped opening. Movement within the mouth.

Preferably, the locking member includes a wedge, a guide rod and a spring; the wedge is arranged in an arc-shaped track, and the housing has a moving channel for the wedge to enter, and the moving direction of the wedge is perpendicular to the moving direction of the movable rod. When the rod passes through the wedge, the wedge is pressed into the moving channel by the movable rod; one end of the guide rod is fixedly connected to the wedge, and the other end of the guide rod extends outward through the shell, and the axis of the guide rod is parallel to In the direction of the passage opening of the moving channel, the shell is provided with a guide opening for the guide rod to pass through; the spring is set on the guide rod, and both ends of the spring are fixedly connected to the wedge and the shell respectively. When the wedge enters the moving channel, The spring is compressed.

Preferably, the slope of the wedge faces the lower crossbar.

Preferably, the end fixing sleeve where the movable rod passes through the strip opening on the fixing bar is provided with a first anti-removal cap.

Preferably, one end of the guide rod passing through the housing is fixedly sleeved with a second anti-removal cap.

Compared with the prior art, the beneficial effects of this application are:

1. In this application, the main body of the trawl can be separated separately through the net bag, so that the fish in the net bag can be easily pulled out to the ship, and due to the settings of the closing mechanism and the locking mechanism, the fish in the net bag can be pulled out when it is pulled out. The net mouth is more tightly closed, making it easier for the fish to be extracted from the sea, and the tightness of the net bag is improved to ensure that the fish are smoothly extracted.

2. This application uses the movable cooperation between the upper crossbar and the lower crossbar, and the mesh port of the mesh bag is connected between the upper and lower crossbars, so that the mesh port of the mesh bag can follow the upper and lower crossbars. The movement of the crossbar completes the opening and closing, realizing the closing of the net bag, and preventing the fish from running out of the net mouth during the retracting process of the net bag.

3. The present application drives the movable part to move along the arc track on the frame toward the upper cross bar through the lower cross bar, so that the locking part positions the movable part, prompting the lower cross bar to always remain in a position close to the upper cross bar, thereby achieving the closure of the net bag mouth, ensuring that the fish in the net bag can be smoothly pulled out of the sea, and improving the net collection effect.

Description of drawings

Figure 1 is a schematic diagram of a fishing boat trawl with a quickly detachable net bag;

Figure 2 is a schematic cross-sectional view at A-A in Figure 1;

Figure 3 is a schematic cross-sectional view taken along line B-B in Figure 2;

Figure 4 is a schematic diagram of the main body of a fishing boat trawl with a net bag that can be quickly separated;

Figure 5 is a schematic three-dimensional structural diagram of the trawl body, the net bag and the separation and pull-out device of a fishing boat trawl with a quickly detachable net bag;

Figure 6 is a front view of Figure 5;

Figure 7 is a schematic three-dimensional structural diagram of a separation and pull-out device for a fishing boat trawl with a net bag that can be quickly separated;

Figure 8 is a front view of Figure 7;

Figure 9 is a cross-sectional view taken along line C-C of Figure 8;

Figure 10 is a three-dimensional structural cross-sectional view at C-C of Figure 8;

FIG. 11 is an enlarged schematic diagram of D in FIG. 9 .

The numbers in the picture are:

1-Trawl main body;

11-opening;

2-reticulum;

3-Arc-shaped support rod;

31-Guide rope;

4-Separate pull-out device;

41-traction rope;

42-closing mechanism; 421-upper crossbar; 4211-guide ring; 422-lower crossbar; 423-collar;

43-locking mechanism; 431-frame; 4311-arc track; 432-movable part; 4321-first anti-removal cap; 433-locking part; 4331-wedge; 4332-guide rod; 4333-spring; 4334-th Secondary anti-cap removal; 434-fixed strip; 4341-strip opening; 435-casing; 4351-moving channel.

Detailed ways

In order to further understand the characteristics, technical means, and specific purposes and functions of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific implementation modes.

Referring to Figures 1 to 11, a fishing boat trawl with a quickly detachable net bag includes a trawl body 1 and a net bag 2; the trawl body 1 is connected to the ship, the tail of the trawl body 1 has an opening 11, and the trawl body 1 1. There are arc-shaped support rods 3 on both sides of the tail opening 11; the net bag 2 is arranged at the tail of the trawl body 1, and the net body of the net bag 2 extends outward through the tail opening 11 of the trawl body 1. The edge of the net mouth is set on the arc-shaped support rod 3; it also includes a separation and pull-out device 4 for pulling the net bag 2 out of the trawl body 1 separately. The separation and pull-out device 4 includes a traction rope 41, a closing mechanism 42 and a lock. mouth mechanism 43; one end of the traction rope 41 is connected to the net bag 2, and the other end of the traction rope 41 is connected to the ship; the closing mechanism 42 and the locking mechanism 43 are both arranged at the net mouth of the net bag 2, and the closing mechanism 42 is connected with the traction The rope 41 is connected, and the locking mechanism 43 and the closing mechanism 42 cooperate with each other.

When the fishing boat drags the trawling net body 1 forward in the sea, the fish enter the net bag 2 at the tail of the trawling net body 1. When the amount of fish entering the net bag 2 reaches a certain amount, the traction rope 41 can be reeled in to make the net bag 2 separate from the opening 11 at the tail of the trawling net body 1 and move toward the ship, so as to unload the fish onto the ship. Due to the setting of the closing mechanism 42, the net mouth of the net bag 2 is closed while the traction rope 41 is pulled upward. After the fish is unloaded, the traction rope 41 is released to make the net bag 2 return to the opening 11 at the tail of the trawling net body 1. When the trawling net body 1 is dragged, the arc shape of the arc-shaped support rod 3 makes the closing mechanism 42 shrink the net mouth of the net bag 2 better. Due to the setting of the locking mechanism 43, when the net mouth of the net bag 2 is retracted, the locking mechanism 43 cooperates with the closing mechanism 42 to close the net mouth of the net bag 2, so as to avoid the situation that the fish rushes out of the net bag 2 during the process of collecting the net, until the net bag 2 is pulled onto the ship, the net mouth of the net bag 2 is opened to take out the fish.

Referring to Figures 1 to 5, the closing mechanism 42 includes an upper crossbar 421 and a lower crossbar 422; the upper crossbar 421 is fixedly provided above the mesh opening of the net bag 2; the lower crossbar 422 is fixedly provided above the net bag 2. Below the mesh opening, the lower crossbar 422 can move in the direction of the upper crossbar 421. When the lower crossbar 422 is close to the upper crossbar 421, the mesh opening of the mesh bag 2 is gradually in a closed state.

When the net bag 2 is pulled out, under the traction of the traction rope 41, the lower cross bar 422 gradually approaches the direction of the upper cross bar 421, until the lower cross bar 422 and the upper cross bar 421 are close to each other, the mesh opening of the net bag 2 follows It is closed, and the fish is in the net bag 2 until the net bag 2 is pulled onto the ship, and then the upper crossbar 421 and the lower crossbar 422 are separated, and then the fish is taken out.

Referring to Figures 1 to 5, the upper part of the opening 11 of the trawl body 1 is provided with a guide rope 31 connected to the ship. The end of the guide rope 31 away from the ship is fixedly connected to the upper part of the opening 11 of the trawl body 1. The upper crossbar 421 There is a guide ring 4211 slidably sleeved on the guide rope 31.

When the traction rope 41 pulls the lower crossbar 422, the lower crossbar 422 approaches in the direction of the upper crossbar 421, until the lower crossbar 422 is close to the upper crossbar 421, the traction rope 41 continues to pull the lower crossbar 422, and the upper crossbar 421 is then driven by the lower crossbar 422, and the upper crossbar 421 moves along the guide rope 31 through the guide ring 4211 until the net bag 2 is straightened on the ship.

Referring to Figures 3 to 6, a set of collars 423 are connected to the edges on both sides of the mesh port of the mesh bag 2 between the upper crossbar 421 and the lower crossbar 422. Each set of collars 423 has several, and several The collars 423 are equally spaced, the traction rope 41 passes through several collars 423 in sequence, and the end of the traction rope 41 that is not connected to the ship is fixedly connected to the lower crossbar 422 .

When the traction rope 41 pulls the lower cross bar 422, since the traction rope 41 passes through several collars 423 and is connected to the lower cross bar 422, as the traction rope 41 pulls the lower cross bar 422, the lower cross bar 422 It can approach the upper crossbar 421 during the pulling process, which avoids the tilting of the lower crossbar 422 during the pulling process, and improves the degree of closing of the mesh port of the net bag 2 when it is closed.

Referring to Figures 7-10, the lock mechanism 43 includes a frame 431, a movable part 432 and a locking part 433; the frame 431 is fixedly mounted on the upper crossbar 421, the lower crossbar 422 is located inside the frame 431, and the frame 431 Both sides have arc-shaped tracks 4311 coaxial with the arc-shaped support rod 3; there are two movable parts 432, and the two movable parts 432 are respectively arranged in an arc-shaped track 4311; there are two locking parts 433, two The locking parts 433 are all arranged on the upper half of the frame 431, and each locking part 433 is located above a movable part 432; both ends of the lower crossbar 422 are provided with fixed bars 434 connected to the corresponding movable parts 432; the frame A housing 435 for installing the corresponding locking piece 433 is provided on the locking piece 431 and at the position of each locking piece 433 .

When the lower cross bar 422 is pulled close to the upper cross bar 421, the lower cross bar 422 drives the movable part 432 to gradually approach the locking part 433 at the upper end of the frame 431, until the movable part 432 passes the locking part 433, the movable part 432 Subsequently, the locking member 433 is positioned so that the lower crossbar 422 cannot be separated from the upper crossbar 421, keeping the lower crossbar 422 at a position close to the upper crossbar 421, and the mesh opening of the net bag 2 is always closed. It avoids the situation that the fish school rushes out from the net bag 2.

Referring to Figures 7 to 10, the movable member 432 is specifically a movable rod. The fixed bar 434 is fixedly connected to the end of the lower cross bar 422. A bar-shaped opening 4341 is horizontally opened on the fixed bar 434. One end of the movable bar is inserted into Located in the bar-shaped opening 4341, the movable rod can move in the bar-shaped opening 4341.

When the movable part 432 moves with the lower cross bar 422, the movement of the lower cross bar 422 drives the movement of the fixed bar 434. Since the fixed bar 434 is provided with a bar-shaped opening 4341, the fixed bar 434 pushes the movable part 432 to move. When moving in the arc track 4311, the movable member 432 moves along the arc track 4311 on the frame 431 toward the locking member 433. Due to the trajectory direction of the arc track 4311, the lower crossbar 422 can also move accurately toward the locking member 433. The direction of the upper crossbar 421 approaches until the movable part 432 is positioned by the locking part 433, and the network port remains closed.

Referring to Figures 10 and 11, the locking member 433 includes a wedge 4331, a guide rod 4332 and a spring 4333; the wedge 4331 is arranged in the arc track 4311, and the housing 435 has a moving channel 4351 for the wedge 4331 to pass through. The moving direction of the wedge 4331 is perpendicular to the moving direction of the movable rod. When the movable rod passes through the wedge 4331, the wedge 4331 is in a state of being pressed into the moving channel 4351 by the movable rod; one end of the guide rod 4332 is fixedly connected to the wedge 4331 , the other end of the guide rod 4332 extends outward through the shell 435, the axis direction of the guide rod 4332 is parallel to the direction of the passage opening of the moving channel 4351, the shell 435 is provided with a guide opening for the guide rod 4332 to pass through; the spring 4333 set Set on the guide rod 4332, the two ends of the spring 4333 are fixedly connected to the wedge 4331 and the housing 435 respectively. When the wedge 4331 enters the moving channel 4351, the spring 4333 is in a compressed state.

When the movable member 432 passes the wedge 4331, the wedge 4331 will be squeezed by the movable member 432 into the moving channel 4351 of the housing 435. The spring 4333 changes from the normal state to the compressed state. When the movable member 432 completely passes through the wedge 4331 , the spring 4333 returns to the normal state, and the wedge 4331 then re-enters the arc track 4311 of the frame 431. The wedge 4331 supports the movable member 432, so that the movable member 432 is limited to the gap between the wedge 4331 and the arc track 4311. Between the ends of the upper end, the lower crossbar 422 also always maintains a close state to the upper crossbar 421.

As shown in FIG. 11 , the slope of the wedge 4331 faces the lower crossbar 422 .

When the movable member 432 passes the wedge 4331, since the slope of the wedge 4331 faces the lower crossbar 422, the movable member 432 can push the wedge 4331 into the moving channel 4351 along the slope until the movable member 432 passes the wedge 4331. , the wedge 4331 returns to the original position under the force of the spring 4333.

As shown in FIG. 8 , the end fixed sleeve of the movable rod passing through the bar-shaped opening 4341 on the fixed bar 434 is provided with a first anti-removal cap 4321 .

When the fixed bar 434 is pushed to move in the arc-shaped track 4311, since the end of the movable rod is provided with a first anti-removal cap 4321, the movable member 432 is prevented from breaking away from the bar-shaped opening 4341 on the fixed bar 434, and always maintains the A state that can be driven by the fixed bar 434.

As shown in FIG. 11 , one end of the guide rod 4332 passing through the housing 435 is fixedly covered with a second anti-removal cap 4334 .

When the wedge 4331 is pushed into the moving channel 4351 by the movable member 432, the guide rod 4332 on the wedge 4331 then moves in the guide opening on the housing 435. Since the end of the guide rod 4332 is provided with a second anti-removal cap 4334, Therefore, the guide rod 4332 is prevented from being separated from the guide opening, and the wedge 4331 is ensured to move normally within the moving channel 4351.

In this application, the trawl body 1 can be separated separately through the net bag 2, so that the fish in the net bag 2 can be easily pulled out to the ship, and due to the settings of the closing mechanism 42 and the locking mechanism 43, the net bag 2 can be When pulled out, the net opening is more tightly closed, which improves the tightness of the closing port of the net bag 2 and ensures that the fish can be taken out smoothly.

The above embodiments only express one or several implementation modes of the present invention, and their descriptions are relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the patent of the present invention should be determined by the appended claims.

Claims

A fishing boat trawl with a quickly detachable net bag, including a trawl main body (1) and a net bag (2);

The trawl body (1) is connected to the ship, the tail of the trawl body (1) has an opening (11), and the opening (11) at the tail of the trawl body (1) has arc-shaped support rods (3) on both sides;

The net bag (2) is arranged at the tail of the trawl main body (1). The net body of the net bag (2) extends outward through the tail opening (11) of the trawl main body (1). The edge of the net mouth of the net bag (2) Set up on the arc-shaped support rod (3);

It is characterized in that it also includes a separate and pull-out device (4) for pulling the net bag (2) out of the trawl body (1) separately. The separate and pull-out device (4) includes a traction rope (41) and a closing mechanism ( 42) and locking mechanism (43);

One end of the traction rope (41) is connected to the net bag (2), and the other end of the traction rope (41) is connected to the ship;

The closing mechanism (42) and the locking mechanism (43) are both arranged at the mesh opening of the net bag (2). The closing mechanism (42) is connected to the traction rope (41), and the locking mechanism (43) and the closing mechanism (42) cooperate with each other.
A fishing trawl with a quickly detachable net bag according to claim 1, characterized in that the closing mechanism (42) includes an upper crossbar (421) and a lower crossbar (422);

The upper crossbar (421) is fixedly arranged above the mesh opening of the mesh bag (2);

The lower crossbar (422) is fixedly arranged below the mesh opening of the mesh bag (2). The lower crossbar (422) can move in the direction of the upper crossbar (421). The lower crossbar (422) is close to the upper crossbar (421). ), the network port of the mesh bag (2) is gradually closed.
A fishing boat trawl with a quickly detachable net bag according to claim 2, characterized in that the upper part of the opening (11) of the trawl body (1) is provided with a guide rope (31) connected to the ship, and the guide rope The end of (31) away from the ship is fixedly connected to the upper part of the opening (11) of the trawl body (1). The upper crossbar (421) is provided with a guide ring (4211) that is slidably sleeved on the guide rope (31).
A fishing boat trawl with a quickly detachable net bag according to claim 3, characterized in that the edges on both sides of the net mouth of the net bag (2) between the upper cross bar (421) and the lower cross bar (422) A set of collars (423) are connected to each set, each set of collars (423) has several collars (423), and the several collars (423) are equally spaced, and the traction rope (41) passes through several collars (423) in turn. ), and the end of the traction rope (41) that is not connected to the ship is fixedly connected to the lower crossbar (422).
A fishing trawl with a quickly detachable net bag according to claim 4, characterized in that the locking mechanism (43) includes a frame (431), a movable part (432) and a locking part (433);

The frame (431) is fixedly arranged on the upper crossbar (421), and the lower crossbar (422) is located inside the frame (431). Both sides of the frame (431) have coaxial joints with the arc-shaped support rod (3). Arc track(4311);

There are two movable parts (432), and the two movable parts (432) are respectively arranged in an arc-shaped track (4311);

There are two locking parts (433). The two locking parts (433) are arranged on the upper half of the frame (431), and each locking part (433) is located above a movable part (432);

Both ends of the lower crossbar (422) are provided with fixed bars (434) connected to the corresponding movable parts (432);

A housing (435) for installing the corresponding locking piece (433) is provided on the frame (431) and at the position of each locking piece (433).
A fishing boat trawl with a quickly detachable net bag according to claim 5, characterized in that the movable part (432) is specifically a movable rod, and the fixed bar (434) is fixed to the end of the lower cross rod (422) Connection, a bar-shaped opening (4341) is horizontally opened on the fixed bar (434), one end of the movable rod is inserted into the bar-shaped opening (4341), and the movable rod can move in the bar-shaped opening (4341).
A fishing trawl with a quickly detachable net bag according to claim 6, characterized in that the locking member (433) includes a wedge (4331), a guide rod (4332) and a spring (4333);

The wedge (4331) is arranged in the arc-shaped track (4311). The housing (435) has a moving channel (4351) for the wedge (4331) to pass through. The moving direction of the wedge (4331) is perpendicular to the movement of the movable rod. direction, when the movable rod passes through the wedge (4331), the wedge (4331) is in a state of being pressed into the moving channel (4351) by the movable rod;

One end of the guide rod (4332) is fixedly connected to the wedge (4331), the other end of the guide rod (4332) extends outward through the housing (435), and the axis direction of the guide rod (4332) is parallel to the moving channel (4351) In the direction of the passage opening, the housing (435) is provided with a guide opening for the guide rod (4332) to pass through;

The spring (4333) is sleeved on the guide rod (4332), and the two ends of the spring (4333) are fixedly connected to the wedge (4331) and the shell (435) respectively. When the wedge (4331) enters the moving channel (4351) , the spring (4333) is in a compressed state.
A fishing boat trawl with a quickly detachable net bag according to claim 7, characterized in that the slope of the wedge (4331) faces the lower crossbar (422).
A fishing boat trawl with a quickly detachable net bag according to claim 7, characterized in that the end fixed sleeve of the movable rod passing through the upper bar-shaped opening (4341) of the fixed bar (434) is provided with a first anti-removal cap. (4321).
A fishing boat trawl with a quickly detachable net bag according to claim 7, characterized in that one end of the guide rod (4332) passing through the housing (435) is fixedly covered with a second anti-removal cap (4334).