Live fish transfer device for a fish farming vessel

Abstract

The application discloses a live fish transfer device for a culture factory ship and belongs to the technical field of fish transfer. In order to solve the problem that the survival rate is low due to the scratch of fish bodies during the transfer of live fish, the device comprises a transfer box and slide plate assemblies fixedly arranged on the outer walls of the two sides of the transfer box, a lifting assembly is vertically and slidingly arranged on the slide plate assembly, a plurality of pairs of positioning assemblies are symmetrically and fixedly arranged on the outer walls of the slide plate assembly, a pair of air pressing assemblies is fixedly arranged on the outer walls of the two sides of the transfer box, the side walls and the bottom surface of the inner cavity of the transfer box are both embedded with anti-scratch assemblies which are slidingly arranged, a winding roller is fixedly arranged at the edge of the opening of the transfer box, an anti-escape net is wound in the winding roller, elongation assemblies are fixedly arranged at the two side edges of the top surface of the transfer box, and the two elongation assemblies are fixedly connected through a connecting rod. The application not only reduces the probability of the scratch of fish bodies, but also adjusts the volume of the transfer box, and improves the space utilization of the transfer box.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fish transportation, in particular to a live fish transfer device for a culture work ship. BACKGROUND

[0002] 90% of China's mariculture is concentrated in land-based and nearshore areas. With the development of the economy and society and the increasing demand for ecological environment, the space for mariculture is severely squeezed, leading to problems such as excessive density, environmental degradation, and frequent disease outbreaks. Deep-sea mariculture has become an important way to expand mariculture space, alleviate the pressure on the nearshore ecological environment, optimize the industrial layout, and achieve sustainable development of mariculture. Large-scale culture work ships can utilize seasonal hydrological conditions in different sea areas to create a suitable and high-quality water temperature environment, and can also actively avoid typhoon attacks to achieve efficient and safe production. However, when the fish on the work ship reach the desired size, they need to be transferred to a turnover ship or land for transportation. During the transfer and transportation process, a live fish transfer device is required. Typically, a crane is used in combination with a net to transfer live fish. However, this method can cause the live fish to be squeezed together, which can result in injury to the fish.

[0003] Current live fish transfer devices not only use a crane in combination with a net to transfer and transport live fish, but also use a crane in combination with a transfer box to transfer and transport live fish. Since the net is relatively soft and has a large degree of deformation, using a net to hold live fish can compress the fish's living space, causing the live fish to be squeezed together and resulting in friction between the fish and the net. This can cause damage to the surface of the fish. When using a transfer box to hold live fish, the inner wall of the transfer box is relatively hard. During the transfer process, when the live fish exhibit a stress response, the fish can rub against the inner wall of the transfer box or directly hit the inner wall of the transfer box, which can cause injury to the fish and even death in severe cases. The injury to the fish not only affects the survival rate of the live fish in the new environment after transfer, but also reduces the value of the fish for sale due to external damage.

[0004] To solve the above problems, a live fish transfer device for a culture work ship is proposed. SUMMARY

[0005] The present application aims to provide a live fish transfer device for a culture work ship. The use of this device can solve the problem of low survival rate of live fish after transfer due to scratches on the fish during the transfer process.

[0006] In order to achieve the above object, the present application provides the following technical scheme: a live fish transfer device for a culture work ship, comprising a transfer box and slide plate assemblies fixedly installed on the outer walls of the two sides of the transfer box, a lifting assembly being vertically slidably installed on the slide plate assemblies, a plurality of pairs of positioning assemblies being symmetrically fixedly installed on the outer walls of the slide plate assemblies, the positioning assemblies being linearly arranged in the vertical direction, a pair of air pressing assemblies being fixedly installed on the outer walls of the two sides of the transfer box, the compression ends of the two pairs of air pressing assemblies being fixedly connected to the lower ends of the lifting assemblies, the two pairs of air pressing assemblies and the interlayer space in the transfer box being respectively provided with a communication arrangement through air pipes, the side walls and the bottom surface of the inner cavity of the transfer box being respectively provided with an anti-scratching assembly embedded and slidably installed, a winding roller being fixedly installed at the edge of the opening of the transfer box, an anti-escape net being wound in the winding roller, the two side edges of the top surface of the transfer box being respectively provided with an elongation assembly fixedly installed, the two elongation assemblies being fixedly connected through a connecting rod, one end of the anti-escape net close to the connecting rod being sleeved on the connecting rod, and the two elongation assemblies and the air pressing assemblies being respectively provided with a communication arrangement through air pipes.

[0007] Further, the transfer box comprises a box body, a plurality of through holes being formed in the side walls and the bottom surface of the inner cavity of the box body, the through holes being communicated with the interlayer space of the box body, and an anti-scratching assembly being slidably installed in the inner cavity of each through hole.

[0008] Further, the box body comprises a box body proper and an anti-slip net fixedly installed on the bottom surface of the box body proper.

[0009] Further, the slide plate assembly comprises a fixed plate fixedly installed on the side wall of the box body and a slide rail fixedly installed on the outer side wall of the fixed plate, a pair of long grooves being further formed in the outer side wall of the fixed plate, the two long grooves being respectively arranged on the two sides of the slide rail.

[0010] Further, the lifting assembly comprises a U-shaped frame and a sliding block fixedly installed on the inner side wall of the lower end of the opening of the U-shaped frame, a pair of limiting columns being fixedly installed on the inner side wall of the sliding block, a recessed area being arranged on the sliding block, the recessed area being capable of being embedded and slidably installed on the slide rail, the two limiting columns being respectively arranged on the two sides of the recessed area and respectively embedded and slidably installed in the inner cavities of the long grooves, and a pair of handles being fixedly installed on the top surface of the U-shaped frame.

[0011] Further, the air pressing assembly comprises a connecting plate fixedly installed on the side wall of the box body and a compression cylinder fixedly installed on the outer side wall of the connecting plate, a compression rod being slidably inserted in the inner cavity of the compression cylinder, the end of the compression rod away from the compression cylinder being fixedly connected to the sliding block, and the compression cylinder being communicated with the interlayer space of the box body through an air pipe.

[0012] Further, the anti-scratch assembly comprises two bearing plates fixedly installed at the upper and lower edges of the through hole respectively, the bearing plates are arranged in the interlayer space of the box body, recesses are formed in the two bearing plates, sliding frames are slidingly installed in the inner cavities of the recesses, the sliding frames are elastically connected with the side walls of the interlayer space of the box body through springs, and air bags are communicatively arranged on the outer side walls of the sliding frames.

[0013] Further, the positioning assembly comprises an outer shell fixedly installed on the outer side wall of the fixed plate and a baffle slidingly installed in the inner cavity of the outer shell, the baffle is elastically connected with the side wall of the inner cavity of the outer shell through a spring, a clamping piece is penetratingly arranged on the outer side wall of the outer shell, and the clamping piece is elastically connected with the outer shell through a spring.

[0014] Further, the elongation assembly comprises long sliding rails fixedly installed at the two side edges of the top surface of the box body and pneumatic telescopic columns fixedly installed on the side walls in the inner cavities of the long sliding rails, the pneumatic telescopic columns are communicatively arranged with the compression cylinders through air pipes, hooks are fixedly installed at the output ends of the pneumatic telescopic columns, and connecting rods are fixedly connected with the inner side walls of the hooks.

[0015] Further, the material of the anti-escape net is soft and flexible, and is arranged in a grid shape, so that the fish can be prevented from escaping and air can be ventilated at the same time.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] When the compressed gas in the air compression assembly enters the interlayer space of the box body through the air pipe, the air bag is inflated, when the air pressure continues to increase, a thrust is generated on the air bag, the air bag drives the sliding frame to slide towards the inner cavity of the box body, and then the air bag moves into the inner cavity of the box body, so that the fish body can be prevented from being scratched during hoisting and transportation; when the air pressure in the interlayer space of the box body returns to the initial state at the end of hoisting and transportation, the air bag is retracted into the through hole, so that the air bag is protected; according to the size of the transported fish, the sliding stroke of the lifting assembly is adjusted, and then the moving distance of the air bag and the sliding frame is adjusted, so that the volume of the box body can be adjusted according to the actual situation, more fish can be loaded as much as possible under the condition of reducing the probability of fish injury, and the space utilization rate of the transfer box is improved; the two pneumatic telescopic columns are synchronously elongated, the anti-escape net is pulled out of the winding roller through the connecting rod, and the opening of the transfer box is completely covered by the anti-escape net, so that the fish cannot escape from the opening of the transfer box due to stress reaction during hoisting and transportation; when the air pressure in the air compression assembly returns to the initial state, the two pneumatic telescopic columns also return to the initial state, the pulling force on the anti-escape net is cancelled, and the anti-escape net is wound on the winding roller again, so that the unloading is facilitated and the next use is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1The overall structure of the present application is shown in the figure.

[0019] Figure 2 The overall structure of the present application is shown in the figure. Figure 1 The enlarged view of A of the present application is shown in the figure.

[0020] Figure 3 The overall structure of the present application is shown in the figure. Figure 1 The enlarged view of B of the present application is shown in the figure.

[0021] Figure 4 The perspective structure of the transfer box of the present application is shown in the figure.

[0022] Figure 5 The overall structure of the present application is shown in the figure.

[0023] Figure 6 The exploded view of the slide plate assembly and the lifting assembly of the present application is shown in the figure.

[0024] Figure 7 The cross-sectional view of the overall structure of the present application is shown in the figure.

[0025] Figure 8 The perspective structure of the scratch-preventing assembly of the present application is shown in the figure.

[0026] Figure 9 The overall structure of the present application is shown in the figure. Figure 7 The enlarged view of C of the present application is shown in the figure.

[0027] Figure 10 The overall structure of the present application is shown in the figure. Figure 7 The enlarged view of D of the present application is shown in the figure.

[0028] Figure 11 The cross-sectional view of the positioning assembly of the present application is shown in the figure.

[0029] Figure 12 The internal structure of the elongation assembly of the present application is shown in the figure.

[0030] In the figure: 1, transfer box; 11, box body; 111, box body proper; 112, anti-skid net; 12, through hole; 2, slide plate assembly; 21, fixed plate; 22, slide rail; 23, long slide groove; 3, lifting assembly; 31, U-shaped frame; 32, slide block; 33, limiting column; 34, recessed area; 35, handle; 4, positioning assembly; 41, outer shell; 42, baffle; 43, spring two; 44, clamping piece; 45, spring three; 5, air compression assembly; 51, connecting plate; 52, compression cylinder; 53, compression rod; 6, winding roller; 7, elongation assembly; 71, long slide; 72, pneumatic telescopic column; 73, draw hook; 8, connecting rod; 9, anti-escape net; 10, scratch-preventing assembly; 101, load-bearing plate; 102, recess; 103, slide frame; 104, spring one; 105, air bag; 20, air pipe. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0032] To solve the technical problem of fish body scratches in the process of fish transfer, such as Figures 1-10 The following preferred technical solutions are provided as shown:

[0033] A live fish transfer device of a culture factory ship comprises a transfer box 1 and slide plate assemblies 2 fixedly installed on the outer walls of the two sides of the transfer box 1 respectively, a lifting assembly 3 is vertically slidably installed on the slide plate assembly 2, the inner cavity of the transfer box 1 is used for containing fish, when the fish is transferred and transported, the lifting assembly 3 is installed on the lifting assembly 3, the lifting device is started, the transfer box 1 can be lifted and transferred, in the process of lifting and transporting, the lifting assembly 3 can slide upward on the slide plate assembly 2, a plurality of pairs of positioning assemblies 4 are symmetrically fixedly installed on the outer side walls of the slide plate assembly 2, the plurality of positioning assemblies 4 are linearly arranged in the vertical direction, the sliding stroke of the lifting assembly 3 can be preset in advance through the positioning assembly 4 in the process of sliding upward of the lifting assembly 3 on the slide plate assembly 2, a plurality of pairs of positioning assemblies 4 are arranged, so that the sliding stroke of the lifting assembly 3 can be set as a stroke with multiple different distances, a pair of air compression assemblies 5 is fixedly installed on the outer walls of the two sides of the transfer box 1 respectively, the compression ends of the two pairs of air compression assemblies 5 are fixedly connected to the lower end of the lifting assembly 3, in the process of sliding upward of the lifting assembly 3 on the slide plate assembly 2, the two pairs of air compression assemblies 5 are synchronously operated, and the gas in the two pairs of air compression assemblies 5 is compressed, since the sliding stroke of the lifting assembly 3 can be set as a stroke with multiple different distances, the air compression assembly 5 can produce compressed gas with different pressure levels.

[0034] Two pairs of air compression assemblies 5 are respectively communicated with the interlayer space in the transfer box 1 through air pipes 20, and the side wall and the bottom surface of the inner cavity of the transfer box 1 are both embedded with anti-scuffing assemblies 10, which are slidingly installed, because the air compression assemblies 5 can produce compressed air with different pressure levels, the sliding distance of the anti-scuffing assemblies 10 from the side wall and the bottom surface of the inner cavity of the transfer box 1 to the inner cavity of the anti-scuffing assemblies 10 is variable, and the specific sliding distance is set according to the actual situation, when the anti-scuffing assemblies 10 do not need to slide out too much, only the sliding stroke of the lifting assembly 3 needs to be set shorter, otherwise, when the anti-scuffing assemblies 10 need to slide out too much, only the sliding stroke of the lifting assembly 3 needs to be set longer, according to the size of the transported fish, the sliding distance of the anti-scuffing assemblies 10 is adjusted, so that the volume of the transfer box 1 can be adjusted according to the actual situation, more fish can be loaded as much as possible under the condition of reducing the probability of fish injury, and such a setting not only improves the space utilization rate of the transfer box 1, but also improves the flexibility during use.

[0035] The edge of the opening of the transfer box 1 is fixedly installed with a winding roller 6, the inside of the winding roller 6 is wound with an anti-escape net 9, the two side edges of the top surface of the transfer box 1 are respectively fixedly installed with elongation assemblies 7, the two elongation assemblies 7 are fixedly connected through a connecting rod 8, one end of the anti-escape net 9 close to the connecting rod 8 is sleeved on the connecting rod 8, and the two elongation assemblies 7 and the air compression assemblies 5 are respectively communicated through air pipes 20, the compressed air in the air compression assemblies 5 enters the two elongation assemblies 7 through the air pipes 20 respectively, the two elongation assemblies 7 are synchronously elongated, and the anti-escape net 9 is pulled out of the winding roller 6 through the connecting rod 8 until the anti-escape net 9 completely covers the opening of the transfer box 1, so as to prevent the fish from escaping from the opening of the transfer box 1 due to stress reaction during hoisting and transportation.

[0036] The transfer box 1 comprises a box body 11, a plurality of through holes 12 are formed in the side wall and the bottom surface of the inner cavity of the box body 11, the plurality of through holes 12 are communicated with the interlayer space of the box body 11, and the inner cavities of the plurality of through holes 12 are slidingly installed with anti-scuffing assemblies 10, when the compressed air enters the interlayer space of the box body 11, the anti-scuffing assemblies 10 are pushed out of the inner cavities of the through holes 12, thereby protecting the fish in the inner cavity of the box body 11.

[0037] The box body 11 comprises a box body proper 111 and an anti-skid net 112 fixedly installed on the bottom surface of the box body proper 111, so that the box body 11 will not easily slide when placed on the ground.

[0038] The sliding plate assembly 2 comprises a fixed plate 21 fixedly installed on the side wall of the box body 11 and a sliding rail 22 fixedly installed on the outer side wall of the fixed plate 21, a pair of long sliding grooves 23 are further formed in the outer side wall of the fixed plate 21, and the two long sliding grooves 23 are respectively arranged on the two sides of the sliding rail 22.

[0039] The lifting assembly 3 comprises a U-shaped frame 31 and a sliding block 32 fixedly installed on the inner side wall of the lower end of the opening of the U-shaped frame 31, a pair of limiting columns 33 are fixedly installed on the inner side wall of the sliding block 32, a recessed area 34 is arranged on the sliding block 32, the recessed area 34 can be embedded and slidingly installed on the sliding rail 22, the two limiting columns 33 are arranged on the two sides of the recessed area 34 respectively, and the two limiting columns 33 are respectively embedded and slidingly installed in the inner cavity of the long sliding groove 23, through the cooperation of the limiting columns 33 and the long sliding groove 23, the lifting assembly 3 can slide along the preset track in the sliding process, and large position deviation does not occur, a pair of handles 35 are fixedly installed on the top surface of the U-shaped frame 31, the hoisting device is installed on the handles 35, and the hoisting device is used for hoisting the transfer box 1.

[0040] The air compression assembly 5 comprises a connecting plate 51 fixedly installed on the side wall of the box body 11 and a compression cylinder 52 fixedly installed on the outer side wall of the connecting plate 51, a compression rod 53 is slidingly installed in the inner cavity of the compression cylinder 52, one end of the compression rod 53 away from the compression cylinder 52 is fixedly connected to the sliding block 32, and the compression cylinder 52 is in communication with the interlayer space of the box body 11 through the air pipe 20.

[0041] The anti-scratch assembly 10 comprises bearing plates 101 fixedly installed on the upper and lower edges of the through hole 12 respectively, the bearing plates 101 are arranged in the interlayer space of the box body 11, recesses 102 are arranged on the two bearing plates 101 respectively, sliding frames 103 are slidingly installed in the inner cavities of the recesses 102, the sliding frames 103 and the side walls of the interlayer space of the box body 11 are elastically connected through springs 104, and air bags 105 are arranged on the outer side walls of the sliding frames 103.

[0042] Specifically, when the fish needs to be transported, the fish is first arranged in the inner cavity of the box body 11, then the hoisting device is installed on the lifting assembly 3, the hoisting device is started, when the hoisting device starts to lift, the lifting assembly 3 slides upwards on the sliding plate assembly 2, the sliding plate assembly 2 drives the air compression assembly 5 to operate in the process of sliding upwards, the gas in the air compression assembly 5 is compressed, when the compressed gas enters the interlayer space of the box body 11 through the air pipe 20, the compressed gas causes the air bags 105 to expand, when the air pressure continues to increase, a thrust is generated on the air bags 105, the air bags 105 drive the sliding frames 103 to slide towards the inner cavity of the box body 11, and then the air bags 105 move into the inner cavity of the box body 11, which can prevent the fish from being scratched in the process of hoisting and transporting, when the air pressure in the interlayer space of the box body 11 returns to the initial state, the sliding frames 103 are driven to retract into the through hole 12 under the elastic force of the springs 104, and the purpose of the arrangement is that the air bags 105 can retract into the through hole 12 when the hoisting and transporting are completed, so as to protect the air bags 105.

[0043] In order to solve the technical problem that the volume of the transfer box 1 becomes smaller when the air bag 105 is inflated, and the volume cannot be adjusted, the following preferred technical solutions are provided as shown in Figure 1 、 Figure 4 and Figures 6-11 .

[0044] The positioning assembly 4 comprises an outer shell 41 fixedly installed on the outer side wall of the fixed plate 21 and a baffle plate 42 slidingly installed in the inner cavity of the outer shell 41. The baffle plate 42 is elastically connected with the side wall of the inner cavity of the outer shell 41 through spring No. 2 43. The outer side wall of the outer shell 41 is provided with a clamping piece 44, and the clamping piece 44 is elastically connected with the outer shell 41 through spring No. 3 45.

[0045] Specifically, the clamping piece 44 is pulled outwards to release the clamping relationship between the clamping piece 44 and the baffle plate 42. Under the elastic action of the spring No. 2 43, the baffle plate 42 extends outwards to block the sliding block 32. In this way, the sliding stroke of the lifting assembly 3 as a whole is limited, so that the hoisting equipment can lift the transfer box 1 through the lifting assembly 3. Since multiple positioning assemblies 4 are provided, the sliding stroke of the lifting assembly 3 can be set to multiple different distances. This allows the air compression assembly 5 to generate compressed gas with different pressures, so that the gas pressure in the interlayer space of the box body 11 is also different. According to the size of the transported fish, the sliding stroke of the lifting assembly 3 is adjusted, and then the moving distance of the air bag 105 and the sliding frame 103 is adjusted, so that the volume of the box body 11 can be adjusted according to the actual situation. Under the condition of reducing the probability of fish injury, as many fish as possible are loaded. This setting not only improves the space utilization rate of the transfer box 1, but also improves the flexibility during use.

[0046] In order to solve the technical problem that the fish escapes from the opening of the transfer box 1 during hoisting and transportation due to stress reaction, the following preferred technical solutions are provided as shown in Figures 1-2 、 Figure 6 and Figure 12 .

[0047] The extension assembly 7 comprises a long slide 71 fixedly installed at both side edges of the top surface of the box body 11 and a pneumatic telescopic column 72 fixedly installed on the side wall of the inner cavity of the long slide 71. The pneumatic telescopic column 72 is in communication with the compression cylinder 52 through the air pipe 20. The output end of the pneumatic telescopic column 72 is fixedly installed with a drag hook 73. The inner side wall of the drag hook 73 is fixedly connected with the connecting rod 8.

[0048] The material of the anti-escape net 9 has softness and toughness, and is arranged in a grid shape. It can prevent fish from escaping while allowing air to pass through.

[0049] Specifically, the compressed gas in the air compression assembly 5 enters the two pneumatic telescopic columns 72 through the air pipes 20 respectively, the two pneumatic telescopic columns 72 are synchronously elongated, and the anti-escape net 9 is pulled out of the winding roller 6 through the connecting rod 8 until the anti-escape net 9 completely covers the opening of the transfer box 1, preventing the fish from escaping from the opening of the transfer box 1 due to stress reaction in the process of hoisting and transporting, when the hoisting and transporting is completed and the transfer box 1 is put down, the lifting assembly 3 slides downward and resets on the sliding plate assembly 2 under the action of its own gravity, at this time, the air pressure in the air compression assembly 5 returns to the initial state, since the winding roller 6 and the pneumatic telescopic column 72 both have the function of rebounding, when the air pressure in the air compression assembly 5 returns to the initial state, the two pneumatic telescopic columns 72 also retract to the initial state, canceling the pulling force on the anti-escape net 9, and at this time, the winding roller 6 winds the anti-escape net 9 again, which is convenient for unloading and also facilitates the next use.

[0050] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0051] Although the embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A live fish transfer device for a fish farming vessel, comprising a transfer box (1) and slide plate assemblies (2) fixedly installed on the outer walls on both sides of the transfer box (1) respectively, a lifting assembly (3) being vertically slidably installed on the slide plate assemblies (2), characterized in that: The outer side wall of the sliding plate assembly (2) is symmetrically fixed with a plurality of pairs of positioning assemblies (4), which are arranged in linear array in the vertical direction. The outer side walls of the transfer box (1) are respectively fixed with a pair of air compression assemblies (5), the compression ends of the two pairs of air compression assemblies (5) are fixedly connected to the lower end of the lifting assembly (3), the two pairs of air compression assemblies (5) and the interlayer space in the transfer box (1) are respectively communicated by air pipes (20), the side wall and the bottom surface of the inner cavity of the transfer box (1) are respectively embedded with anti-scratch assemblies (10), the edge of the opening of the transfer box (1) is fixedly installed with a winding roller (6), the winding roller (6) is wound with an anti-escape net (9), the two side edges of the top surface of the transfer box (1) are respectively fixedly installed with elongation assemblies (7), the two elongation assemblies (7) are fixedly connected by a connecting rod (8), one end of the anti-escape net (9) close to the connecting rod (8) is sleeved on the connecting rod (8), and the two elongation assemblies (7) and the air compression assemblies (5) are respectively communicated by air pipes (20); The transfer box (1) comprises a box body (11), a plurality of through holes (12) are formed in the side wall and the bottom surface of the inner cavity of the box body (11), the plurality of through holes (12) are communicated with the interlayer space of the box body (11), and the anti-scratch assemblies (10) are slidably installed in the inner cavities of the plurality of through holes (12); The sliding plate assembly (2) comprises a fixed plate (21) fixedly installed on the side wall of the box body (11) and a sliding rail (22) fixedly installed on the outer side wall of the fixed plate (21), and a pair of long sliding grooves (23) are formed in the outer side wall of the fixed plate (21), and the two long sliding grooves (23) are arranged on the two sides of the sliding rail (22); The lifting assembly (3) comprises a U-shaped frame (31) and sliding blocks (32) fixedly installed on the inner side walls of the lower end portions of the openings of the U-shaped frame (31), a pair of limiting columns (33) are fixedly installed on the inner side walls of the sliding blocks (32), recessed areas (34) are formed on the sliding blocks (32), the recessed areas (34) are embedded and slidably installed on the sliding rail (22), the two limiting columns (33) are arranged on the two sides of the recessed area (34), and the two limiting columns (33) are respectively embedded and slidably installed in the inner cavities of the long sliding grooves (23), and a pair of handles (35) are fixedly installed on the top surface of the U-shaped frame (31); The air compression assembly (5) comprises a connecting plate (51) fixedly installed on the side wall of the box body (11) and a compression cylinder (52) fixedly installed on the outer side wall of the connecting plate (51), a compression rod (53) is slidably inserted in the inner cavity of the compression cylinder (52), one end of the compression rod (53) away from the compression cylinder (52) is fixedly connected to the sliding block (32), and the compression cylinder (52) is communicated with the interlayer space of the box body (11) by the air pipe (20). The anti-scratch assembly (10) comprises two load-bearing plates (101) fixedly installed at the upper and lower edges of the through hole (12) respectively, the load-bearing plates (101) are arranged in the interlayer space of the box body (11), recesses (102) are formed in the load-bearing plates (101), sliding frames (103) are slidingly installed in the cavities of the recesses (102), the sliding frames (103) are elastically connected with the side walls of the interlayer space of the box body (11) through springs (104), and air bags (105) are arranged on the outer side walls of the sliding frames (103) in communication. The positioning assembly (4) comprises an outer shell (41) fixedly installed on the outer side wall of the fixed plate (21) and a baffle (42) slidingly installed in the inner cavity of the outer shell (41), the baffle (42) is elastically connected with the side wall of the inner cavity of the outer shell (41) through a spring (43), a clamping piece (44) is penetratingly arranged on the outer side wall of the outer shell (41), and the clamping piece (44) is elastically connected with the outer shell (41) through a spring (45). The elongation assembly (7) comprises long sliding rails (71) fixedly installed at the two side edges of the top surface of the box body (11) and a pneumatic telescopic column (72) fixedly installed on the side wall of the inner cavity of the long sliding rail (71), the pneumatic telescopic column (72) is in communication with the compression cylinder (52) through the air pipe (20), the output end of the pneumatic telescopic column (72) is fixedly installed with a drag hook (73), and the inner side wall of the drag hook (73) is fixedly connected with the connecting rod (8).

2. A live fish transfer device for a fish farming vessel according to claim 1, characterized in that: The box body (11) comprises a box body (111) and an anti-skid net (112) fixedly installed on the bottom surface of the box body (111).

3. A live fish transfer device for a fish farming vessel according to claim 1, characterized in that: The material of the anti-escape net (9) is soft and flexible, and is arranged in a grid shape, so that the anti-escape net (9) can prevent fish from escaping and ventilate at the same time.

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