CN211322605U

CN211322605U - Culture net cage

Info

Publication number: CN211322605U
Application number: CN201922139214.8U
Authority: CN
Inventors: 刘志强; 牟毅
Original assignee: Zhejiang Ocean University ZJOU
Current assignee: Zhejiang Ocean University ZJOU
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-08-25
Anticipated expiration: 2029-12-03

Abstract

The utility model belongs to the technical field of the box with a net breed, a aquaculture net case is related to. The utility model comprises a culture net cage, wherein the culture net cage comprises an upper supporting floating frame and a lower supporting frame fixed on the seabed, a plurality of cylinder shells are arranged between the upper supporting floating frame and the lower supporting frame, a telescopic piece which can slide up and down is arranged in each cylinder shell, the upper end of the telescopic piece extends out of the top of the cylinder shell, the end part of the telescopic piece is hinged on the upper supporting floating frame, and the lower end of the telescopic piece is arranged in the cylinder shell in a sliding manner; a bait recovery net is arranged at the bottom of the aquaculture net cage and connected to each cylinder shell through a rod, one end of the rod penetrates through a through groove formed in each cylinder shell, the end part of the rod is fixedly connected to a transmission mechanism located below the telescopic piece, and the other end of the rod is hinged to a box body located in the aquaculture net cage; when the telescopic piece slides up and down, the telescopic piece drives the bait collecting mechanism to synchronously and reversely move through the transmission mechanism. The utility model has the advantages that: collecting and reusing the bait on the bottom of the aquaculture net cage.

Description

Culture net cage

Technical Field

The utility model belongs to the technical field of the box with a net breed, a aquaculture net case is related to.

Background

As the cage culture has the advantages of low cost, high yield, convenient management, high recapture rate and the like, the cage culture is rapidly developed in coastal areas in recent years.

One type of aquaculture net cage mainly comprises an annular supporting floating frame, an aquaculture net cage and a fixing device, wherein the annular supporting floating frame floats on the sea surface; the upper end of the aquaculture net cage is provided with an opening, the edge of the upper end opening of the aquaculture net cage is fixed on the annular floating frame, and the bottom of the aquaculture net cage is lowered to a limited depth underwater by the gravity of the aquaculture net cage; the fixing device comprises a plurality of counterweights which are settled to the seabed and a fixing inhaul cable which is used for connecting the counterweights and the annular supporting floating frame and is used for fixing the annular supporting floating frame. In the process of cage culture, because the bait is directly thrown into the culture cage in the feeding way, the feeding way throws the bait into the culture cage in a large amount at one time, and the method has the following defects: because the baits are put in a concentrated mode at one time, a large amount of baits which are not eaten by fishes in the aquaculture net cage sink and pass through the aquaculture net cage, the baits are seriously wasted, a large amount of residual baits are deposited on the seabed, the marine geological environment is influenced, and the problem that the marine geological environment shows the eutrophication trend is solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems in the prior art, providing an aquaculture net cage, which aims to solve the technical problems that: how to collect and reuse the bait on the bottom of the aquaculture net cage.

The utility model discloses a following technical scheme realizes: the utility model provides a culture net cage, includes culture net cage, culture net cage includes the upper support floating frame and fixes the lower carriage in the seabed to and still include:

the cylinder shells are arranged between the upper supporting floating frame and the lower supporting frame; each cylindrical shell is internally provided with a telescopic piece which slides up and down, the upper end of each telescopic piece extends out of the top of the cylindrical shell, the end part of each telescopic piece is hinged on the upper supporting floating frame, and the lower end of each telescopic piece is arranged in the cylindrical shell in a sliding manner;

the annular bait recovery net is arranged on the bottom of the culture net cage; the bait recovery net is connected to each cylindrical shell through a rod, one end of the rod penetrates through a strip-shaped through groove formed in the inner side of each cylindrical shell, the end part of the rod is fixedly connected to a transmission mechanism located below the telescopic piece, and the other end of the rod is hinged to a box body located in the breeding net box; when the telescopic piece slides up and down, the telescopic piece drives the bait collecting mechanism to synchronously and reversely move through the transmission mechanism.

In the above-mentioned breeding net cage, the telescopic part comprises a slide block connecting rod and a slide block arranged in the cylinder shell in a sliding manner; the upper end of the slide block connecting rod extends out of the top of the cylindrical shell, the end part of the slide block connecting rod is hinged to the upper supporting floating frame, and the lower end of the slide block connecting rod is fixedly connected to the slide block; a drainage box is arranged in the breeding net cage; a drainage box connecting rod is arranged between the drainage box and each sliding block; one end of the drainage box connecting rod penetrates through the through groove, the end part of the drainage box connecting rod is fixedly connected to the sliding block, and the other end of the drainage box connecting rod is hinged to the drainage box; the box body is a water inlet box positioned below the drainage box; a corrugated pipe is arranged between the water inlet tank and the water discharge tank; the upper edge of the corrugated pipe is fixedly connected to the periphery of the opening on the lower side surface of the drainage tank, and the lower edge of the corrugated pipe is fixedly connected to the periphery of the opening on the upper side surface of the water inlet tank; a plurality of first nozzles are connected to the lower side surface of the drainage box around the corrugated pipe; the water inlet tank is connected with a water inlet pipe, and the water inlet pipe is provided with a water inlet one-way valve.

In the cultivation net cage, the drainage box is also connected with a plurality of drainage pipes; one end of each drain pipe is communicated with the inside of the drain box, and the other end of each drain pipe is connected with a second nozzle; each of the second nozzles faces the first netting disposed on the adjacent two cylindrical housings.

In the above-mentioned aquaculture net cage, a second netting is arranged between the top of the cylindrical shell and the upper supporting floating frame.

In the above aquaculture net cage, the transmission mechanism includes a rotating shaft rotatably disposed on the inner wall of the cylindrical shell, and the axis of the rotating shaft is perpendicular to the axis of the cylindrical shell; a first gear and a second gear are coaxially and fixedly arranged on the rotating shaft respectively; the first gear and the second gear are respectively connected with an upper rack and a lower rack which are arranged in the cylinder shell in a sliding manner in a meshing manner; the upper rack and the lower rack are respectively positioned on two sides of the rotating shaft; the upper end of the upper rack is fixedly arranged on the sliding block, and the lower end of the upper rack is suspended; the two ends of the lower rack are respectively suspended, and the lower rack is fixedly connected with a rod connected with a bait recovery net.

In the above aquaculture net cage, the teeth of the first gear are smaller than the teeth of the second gear.

In the breeding net cage, a notch located right above the lower rack is formed in the sliding block, and the size of the cross section of the notch is larger than that of the cross section of the lower rack.

In the above-mentioned breeding net cage, a floating body is hinged on the upper supporting floating frame; an air cylinder is fixedly arranged on the cylinder shell, a piston is arranged in the air cylinder in a sliding manner, and a piston rod is fixedly arranged on the piston; the upper end of the piston rod extends out of the top of the air cylinder, the end part of the piston rod is hinged to the floating body, and the lower end of the piston rod is fixedly arranged on the piston; the inflator is connected with an air inlet pipe and an air outlet pipe respectively; a connecting hose is connected between the floating body and the air inlet pipe, the upper end of the connecting hose is connected with a vent pipe arranged on the upper side surface of the floating body, and the lower end of the connecting hose is connected with the air inlet pipe; one end of the exhaust pipe is communicated with the inside of the inflator, and the other end of the exhaust pipe extends into the cultivation net box.

In the above-mentioned breeding net cage, the piston divides the interior of the air cylinder into an upper air cavity and a lower air cavity; the air inlet pipe comprises an upper air inlet pipe and a lower air inlet pipe; one end of the upper air inlet pipe is respectively communicated with the lower end of the connecting hose and the upper end of the lower air inlet pipe through a three-way pipe, and the other end of the upper air inlet pipe is communicated with the upper air cavity; an upper air inlet check valve is arranged on the upper air inlet pipe; the lower end of the lower air inlet pipe is communicated with a lower air cavity, and a lower air inlet check valve is arranged on the lower air inlet pipe; the exhaust pipe comprises an upper exhaust pipe and a lower exhaust pipe; one end of the upper exhaust pipe is communicated with the upper air cavity, the other end of the upper exhaust pipe is positioned below the bottom of the aquaculture net cage, and an upper exhaust check valve is arranged on the upper exhaust pipe; one end of the lower exhaust pipe is communicated with the lower air cavity, and the other end of the lower exhaust pipe extends into the middle part of the aquaculture net cage; and a lower exhaust pipe check valve is arranged on the lower exhaust pipe.

In the above-mentioned aquaculture net cage, the ventilation pipe is a U-shaped pipe.

Compared with the prior art, the aquaculture net cage has the following advantages:

1. when the seawater level rises, the upper supporting floating frame rises synchronously by virtue of buoyancy and drives the telescopic piece to slide upwards; the telescopic piece drives the water inlet tank connecting rod and the bait recovery net to synchronously move downwards through the transmission mechanism, so that the bait is recovered and descends to the bottom of the aquaculture net cage to collect the uneaten bait. When the seawater level descends, the upper supporting floating frame descends along with the seawater by means of the self gravity and always floats on the seawater surface. At the moment, the upper support floating frame drives the telescopic piece to slide downwards, and the telescopic piece drives the water inlet tank connecting rod and the bait recovery net to synchronously move upwards through the transmission mechanism, so that the bait recovery net rises, and the fish can eat the bait on the bait recovery net conveniently.

The upper supporting floating frame always floats on the sea water surface, so the upper supporting floating frame is also always influenced by waves. The wave drives the upper supporting floating frame to float continuously. When the upper support floating frame moves up and down, the telescopic piece drives the bait recovery net to move up and down through the transmission mechanism, and the distance of the wave energy driving the upper support floating frame to float up and down is far less than the distance of the upper support floating frame to float up and down caused by tidal energy, namely the range of the up-and-down movement of the bait recovery net is small. The bait on the bait recovery net always floats above the bait recovery net, so that the fish can eat the bait conveniently, and the blockage of the bait on the bait recovery net by meshes is avoided.

The aquaculture net cage converts tidal energy and wave energy into mechanical energy for the upward and downward movement of the bait recovery net, and improves the utilization rate of green energy. Meanwhile, the bait recovery net can be used for re-eating the collected baits for the fishes, so that the bait eating rate is improved, and the marine pollution is reduced.

2. In the fish lifting process, a large number of fishes are often gathered at the bottom of the aquaculture net cage, and the bottom of the aquaculture net cage is positioned at a deep water level of the sea bottom, so that the fish lifting difficulty is greatly increased, and the fish in the aquaculture net cage is not easy to capture. When the fish of the aquaculture net cage starts to rise, the weight of the floating support frame is increased, so that the weight of the floating support frame is larger than the total buoyancy generated by the floating support frame, the floating support frame descends at the moment, the integral gravity center of the aquaculture net cage is reduced, and the stability of the aquaculture net cage is improved. Meanwhile, the telescopic piece drives the bait recovery net to ascend through the transmission mechanism. As the mesh of the bait recovery net is smaller than the size of the adult fish, the fish rises along with the bait recovery net, thereby improving the height of the fish and facilitating the capture of the fish in the cultivation net cage.

3. The upper supporting floating frame drives the slide block connecting rod to move up and down, and the slide block connecting rod drives the slide block. The slide block drives the drainage box to move up and down through the drainage box connecting rod; meanwhile, the water inlet tank makes synchronous movement through the water inlet tank connecting rod. Thereby compressing and stretching the bellows to change the volume of the bellows. When the corrugated pipe is compressed, the size is reduced, the seawater is sprayed out from the first nozzle, the sprayed seawater causes the change of peripheral water flow and simultaneously impacts the bait, so that the bait is diffused to the periphery, and the bait eating rate is improved.

4. When the corrugated pipe is compressed, the volume is reduced, the seawater is sprayed out from the first nozzle and the second nozzle simultaneously, and the second nozzle flushes the first netting to remove attachments on the first netting.

5. Because the rotating speeds of the first gear and the second gear are the same, the sliding speed of the lower rack driven by the second gear is higher than the sliding speed of the upper rack. The second gear drives the lower rack to move for a distance greater than the distance that the upper rack moves. The distance of net up-and-down motion is collected to bait is effectively improved to this structure.

6. When the piston moves downwards, the volume of the upper air cavity is expanded, and the volume of the lower air cavity is reduced. At the moment, outside air flows into the upper air cavity through the upper air inlet pipe, and air in the lower air cavity is exhausted into the middle part of the aquaculture net cage through the lower exhaust pipe. When the piston moves upwards, the volume of the upper air cavity is reduced, and the volume of the lower air cavity is expanded. At the moment, outside air flows into the lower air cavity through the lower air inlet pipe, and air in the upper air cavity is discharged from the lower part of the aquaculture net cage through the upper air outlet pipe. The structure effectively improves the oxygen content of the seawater in the culture net cage. In addition, the upper vent tube discharge end is at a greater depth than the lower vent tube discharge end, which causes the pressure of the gas in the upper chamber to be greater than the pressure of the gas in the lower chamber. Therefore, the resistance to be overcome when the piston slides upward is greater than the resistance to be overcome when the piston slides downward. This arrangement helps to overcome the problem of the float being light in weight and having difficulty in sliding the piston downwardly.

Drawings

Fig. 1 is a schematic structural view of the utility model when the water level of the seawater is high.

Fig. 2 is a schematic structural view of the utility model when the water level of the seawater is low.

Fig. 3 is a sectional view of the structure at a-a in fig. 1.

Fig. 4 is a sectional view of the structure at B-B in fig. 2.

Fig. 5 is an enlarged view of the structure at C in fig. 1.

In the figure, 1, a culture net cage; 11. an upper support floating frame; 12. a lower support frame; 121. an anchor; 122. an anchor link; 13. a first netting; 14. a second netting; 2. a cylindrical housing; 21. a slider; 211. a notch; 22. a slider connecting rod; 23. a through groove; 3. a drain tank; 31. a drainage box connecting rod; 32. a first nozzle; 33. a bellows; 34. a drain pipe; 35. a second nozzle; 4. a water inlet tank; 41. a water inlet tank connecting rod; 42. a bait recovery net; 43. a water inlet pipe; 44. a water inlet one-way valve; 5. an air cylinder; 51. a piston; 52. a piston rod; 521. a piston rod connecting rod; 53. an upper air cavity; 54. a lower air cavity; 55. an upper intake pipe; 551. an upper air inlet check valve; 56. an upper exhaust pipe; 561. an upper exhaust check valve; 57. a lower air inlet pipe; 571. a lower air inlet check valve; 58. a lower exhaust pipe; 581. a lower exhaust pipe check valve; 6. a float; 61. a U-shaped tube; 62. a connecting hose; 7. a rotating shaft; 71. a first gear; 72. a second gear; 73. a lower rack; 74. and (4) an upper rack.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Referring to fig. 1 to 5, an aquaculture net cage includes an aquaculture net cage 1, the aquaculture net cage 1 includes an upper support floating frame 11 and a lower support frame 12, the lower support frame 12 is connected with an anchor 121 through an anchor connecting rod 122, the lower support frame 12 is fixed on the sea floor through the anchor connecting rod 122 and the anchor 121, and further includes:

4-8 cylindrical shells 2, wherein each cylindrical shell 2 is arranged between an upper supporting floating frame 11 and a lower supporting frame 12; each cylindrical shell 2 is internally provided with a telescopic piece which slides up and down, the upper end of the telescopic piece extends out of the top of the cylindrical shell 2, the end part of the telescopic piece is hinged on the upper supporting floating frame 11, and the lower end of the telescopic piece is arranged in the cylindrical shell 2 in a sliding manner;

an annular bait recovery net 42 arranged on the bottom of the aquaculture net cage 1; the bait recovery net 42 is connected to each cylindrical shell 2 through a rod, one end of the rod penetrates through the strip-shaped through groove 23 formed in the inner side of the cylindrical shell 2 and the end of the rod is fixedly connected to the transmission mechanism located below the telescopic piece, the other end of the rod is hinged to the box body located in the aquaculture net box 1, and the rod is a water inlet box connecting rod 41; when the telescopic piece slides up and down, the telescopic piece drives the bait collecting mechanism to synchronously and reversely move through the transmission mechanism.

The upper supporting floating frame 11 floats on the surface of seawater by means of buoyancy. Under the action of the upper supporting floating frame 11, the whole aquaculture net cage 1 floats in the seawater. Under the action of tide, the seawater level will change. When the seawater level rises, the upper supporting floating frame 11 rises synchronously by virtue of buoyancy and drives the telescopic piece to slide upwards at the same time; the telescopic piece drives the water inlet tank connecting rod 41 and the bait recovery net 42 to synchronously move downwards through the transmission mechanism, so that the bait recovery net 42 descends to the bottom of the aquaculture net cage 1 to collect uneaten bait. When the seawater level falls, the upper supporting floating frame 11 falls with the seawater by means of the self gravity and floats on the seawater surface all the time. At this time, the upper supporting floating frame 11 drives the telescopic member to slide downwards, and the telescopic member drives the water inlet tank connecting rod 41 and the bait recovering net 42 to synchronously move upwards through the transmission mechanism, so that the bait recovering net 42 rises, and the fish can conveniently eat the bait on the bait recovering net 42.

The upper supporting floating frame 11 always floats on the surface of the sea water, so the upper supporting floating frame 11 is also always influenced by the waves. The wave drives the upper supporting floating frame 11 to float continuously. When the upper supporting floating frame 11 moves up and down, the telescopic piece drives the bait recovery net 42 to move up and down through the transmission mechanism, and the distance of the wave energy driving the upper supporting floating frame 11 to float up and down is far less than the distance of the upper and lower floating caused by tidal energy, namely the range of the up and down movement of the bait recovery net 42 is small. This makes the bait on the bait recovery net 42 float above the bait recovery net 42 all the time, thereby facilitating the fish to eat, and avoiding the bait to block the meshes of the bait recovery net 42.

The aquaculture net cage converts tidal energy and wave energy into mechanical energy for the upward and downward movement of the bait recovery net 42, and improves the utilization rate of green energy. Meanwhile, the bait recycling net 42 reuses the collected baits for the fishes, so that the bait consumption rate is improved, and the marine pollution is reduced.

In addition, in the fish raising process, a large amount of fish often gather at the bottom of the aquaculture net cage 1, and the bottom of the aquaculture net cage 1 is located at a deep water level of the sea bottom, so that the fish raising difficulty is greatly increased, and the fish in the aquaculture net cage 1 is not easy to capture. When the fish of this aquaculture net case starts, increase floating support frame 11 weight for floating support frame 11's weight is greater than the total buoyancy that floating support frame 11 produced, and floating support frame 11 descends this moment, and aquaculture net case 1 whole focus reduces, and this stability that makes aquaculture net case 1 improves. Meanwhile, the retractable member drives the bait recovery net 42 to ascend through the transmission mechanism. Because the mesh of the bait recovery net 42 is smaller than the size of the adult fish, the fish rises along with the bait recovery net 42, thereby increasing the height of the fish and facilitating the capture of the fish in the aquaculture net cage 1.

Further, the bait recovery net 42 is in a truncated cone shape with a large top and a small bottom.

The structure is convenient for concentrating the bait in the middle of the bait recovery net 42, and is beneficial to improving the eating rate of the bait.

Specifically, the telescopic member includes a slider link 22 and a slider 21 slidably disposed in the cylinder housing 2; the upper end of the slide block connecting rod 22 extends out of the top of the cylindrical shell 2, the end part of the slide block connecting rod is hinged on the upper supporting floating frame 11, and the lower end of the slide block connecting rod is fixedly connected on the slide block 21; a drainage box 3 is arranged in the aquaculture net cage 1; a drainage box connecting rod 31 is arranged between the drainage box 3 and each sliding block 21; one end of the drainage box connecting rod 31 penetrates through the through groove 23, the end part of the drainage box connecting rod is fixedly connected to the sliding block 21, and the other end of the drainage box connecting rod is hinged to the drainage box 3; the box body is a water inlet box 4 positioned below the drainage box 3; a corrugated pipe 33 is arranged between the water inlet tank 4 and the water discharge tank 3; the upper edge of the corrugated pipe 33 is fixedly connected with the periphery of the opening on the lower side surface of the drainage tank 3, and the lower edge of the corrugated pipe is fixedly connected with the periphery of the opening on the upper side surface of the water inlet tank 4; a plurality of first nozzles 32 are connected to the lower side of the drainage tank 3 around a corrugated pipe 33; the water inlet tank 4 is connected with a water inlet pipe 43, and the water inlet pipe 43 is provided with a water inlet one-way valve 44.

The upper supporting floating frame 11 drives the slide block connecting rod 22 to move up and down, and the slide block connecting rod 22 drives the slide block 21. The slide block 21 drives the drainage box 3 to move up and down through the drainage box connecting rod 31; meanwhile, the water inlet tank 4 moves synchronously through the water inlet tank connecting rod 41. Thereby compressing and stretching the bellows 33 to change the volume of the bellows 33. When the corrugated pipe 33 is compressed, the volume is reduced, the seawater is sprayed out from the first nozzle 32, the sprayed seawater causes the change of the surrounding water flow and simultaneously impacts the bait, so that the bait is diffused to the periphery, and the bait eating rate is improved.

When the bellows 33 is stretched, the volume becomes larger and the seawater flows from the intake pipe 43 into the water tank 4. This structure makes it easier for the seawater to enter the water inlet tank 4 and for the seawater to be sprayed out from the first nozzle 32, since the lower end of the water inlet pipe 43 is located at a depth greater than that of the first nozzle 32.

Specifically, the drain tank 3 is also connected with a plurality of drain pipes 34; one end of each drain pipe 34 is communicated with the inside of the drain tank 3, and the other end is connected with a second nozzle 35; each of the second nozzles 35 faces the first netting 13 provided on the adjacent two cylindrical housings 2.

When the corrugated pipe 33 is compressed, the volume is reduced, the seawater is sprayed out from the first nozzle 32 and the second nozzle 35 simultaneously, the second nozzle 35 flushes the first net 13, and attachments on the first net 13 are removed; the seawater sprayed out by the first nozzle 32 enables the bait to diffuse around, which is beneficial to improving the bait eating rate.

Specifically, a second net 14 is arranged between the top of the cylindrical shell 2 and the upper supporting floating frame 11.

When the upper supporting floating frame 11 floats, the second net 14 extends and contracts, but always encloses the upper layer of the aquaculture net cage 1, and the structure prevents fish from escaping from the aquaculture net cage 1.

Specifically, the transmission mechanism comprises a rotating shaft 7 which is rotatably arranged on the inner wall of the cylindrical shell 2, and the axis of the rotating shaft 7 is perpendicular to the axis of the cylindrical shell 2; a first gear 71 and a second gear 72 are coaxially and fixedly arranged on the rotating shaft 7 respectively; the first gear 71 and the second gear 72 are respectively engaged and connected with an upper rack 74 and a lower rack 73 which are arranged in the cylinder shell 2 in a sliding way; the upper rack 74 and the lower rack 73 are respectively positioned at two sides of the rotating shaft 7; the upper end of the upper rack 74 is fixedly arranged on the sliding block 21, and the lower end is suspended; and two ends of the lower rack 73 are respectively suspended, and the lower rack 73 is fixedly connected with one end of the water inlet tank connecting rod 41.

When the slide block 21 slides up and down, the slide block 21 drives the upper rack 74, and the upper rack 74 drives the first gear 71 to rotate. The first gear 71 drives the second gear 72 to rotate via the rotating shaft 7. The second gear 72 drives the lower rack 73 to synchronously and reversely slide, and the lower rack 73 drives the bait collecting net 42 and the water inlet tank 4 to synchronously move through the water inlet tank connecting rod 41.

Specifically, the number of teeth of the first gear 71 is smaller than that of the second gear 72.

Since the first gear 71 and the second gear 72 rotate at the same speed, the second gear 72 drives the lower rack 73 to slide at a speed higher than that of the upper rack 74. The second gear 72 moves the lower rack 73 a greater distance than the upper rack 74. This structure effectively improves the distance of the up-and-down movement of the bait collecting net 42.

Specifically, the slider 21 is provided with a notch 211 located right above the lower rack 73, and the size of the cross section of the notch 211 is larger than that of the cross section of the lower rack 73.

During the upward sliding process of the lower rack 73, the upper end of the lower rack 73 passes through the notch 211 and extends out of the upper side of the slider 21. This structure prevents the lower rack 73 from being caught by the slider 21 when sliding upward.

Specifically, the upper supporting floating frame 11 is hinged with a floating body 6; an air cylinder 5 is fixedly arranged on the cylindrical shell 2, a piston 51 is slidably arranged in the air cylinder 5, and a piston rod 52 is fixedly arranged on the piston 51; the upper end of the piston rod 52 extends out of the top of the air cylinder 5, the end part of the piston rod is hinged on the floating body 6 through a piston rod connecting rod 521, and the lower end of the piston rod is fixedly arranged on the piston 51; the air cylinder 5 is respectively connected with an air inlet pipe and an air outlet pipe; a connecting hose 62 is connected between the floating body 6 and the air inlet pipe, the upper end of the connecting hose 62 is connected with a vent pipe arranged on the upper side surface of the floating body 6, and the lower end of the connecting hose 62 is connected with the air inlet pipe; one end of the exhaust pipe is communicated with the inside of the air cylinder 5, and the other end of the exhaust pipe extends into the aquaculture net cage 1.

When the floating body 6 floats up and down, the floating body 6 drives the piston rod 52 to move up and down through the piston rod connecting rod 521, and the piston rod 52 drives the piston 51. Due to the up-and-down sliding of the piston 51, the volume of the air cavity partitioned by the interior of the air cylinder 5 is changed at any moment, so that the outside air is sucked into the air cylinder 5 through the air inlet pipe and is discharged into the aquaculture net cage 1 through the air outlet pipe, and the oxygen content in the aquaculture net cage 1 is increased.

The floating up and down of the floating body 6 mainly comprises two aspects: under the action of tide, the upper supporting floating frame 11 floats up and down along with the water level of the seawater, the upper supporting floating frame 11 simultaneously drives the floating body 6, so as to drive the piston 51 to move up and down, and in the process, the buoyancy and gravity of the upper supporting floating frame 11 are mainly relied on, so that the tidal energy is fully utilized; under the action of waves, the floating body 6 floats up and down around the hinge point, so that the piston 51 moves up and down, the process mainly converts wave energy into mechanical energy for moving the piston 51 up and down, and the wave energy is fully utilized.

Specifically, the piston 51 partitions the inside of the gas cylinder 5 into an upper gas chamber 53 and a lower gas chamber 54; the intake pipes include an upper intake pipe 55 and a lower intake pipe 57; one end of the upper air inlet pipe 55 is respectively communicated with the lower end of the connecting hose 62 and the upper end of the lower air inlet pipe 57 through a three-way pipe, and the other end is communicated with the upper air cavity 53; an upper air inlet check valve 551 is arranged on the upper air inlet pipe 55; the lower end of the lower air inlet pipe 57 is communicated with the lower air cavity 54, and a lower air inlet check valve 571 is arranged on the lower air inlet pipe 57; the exhaust pipes include an upper exhaust pipe 56 and a lower exhaust pipe 58; one end of the upper exhaust pipe 56 is communicated with the upper air cavity 53, the other end of the upper exhaust pipe is positioned below the bottom of the aquaculture net cage 1, and an upper exhaust check valve 561 is arranged on the upper exhaust pipe 56; one end of the lower exhaust pipe 58 is communicated with the lower air cavity 54, and the other end thereof extends into the middle part of the aquaculture net cage 1; the lower exhaust pipe 58 is provided with a lower exhaust pipe check valve 581.

As the piston 51 moves downward, the upper air chamber 53 expands in volume while the lower air chamber 54 contracts in volume. At this time, the outside air flows into the upper air chamber 53 through the upper air inlet pipe 55, and the air in the lower air chamber 54 is discharged into the middle of the aquaculture net cage 1 through the lower air outlet pipe 58. As the piston 51 moves upward, the upper air chamber 53 decreases in volume while the lower air chamber 54 increases in volume. At this time, the outside air flows into the lower air chamber 54 through the lower air inlet pipe 57, and the air in the upper air chamber 53 is discharged from the lower side of the aquaculture net cage 1 through the upper air outlet pipe 57.

The structure effectively improves the oxygen content of the seawater in the aquaculture net cage 1. In addition, the depth at which the discharge end of the upper discharge pipe 56 is located is greater than the depth at which the discharge end of the lower discharge pipe 58 is located, which causes the pressure of the gas in the upper gas chamber 53 to be greater than the pressure of the gas in the lower gas chamber 54. Therefore, the resistance to be overcome when the piston 51 slides upward is larger than the resistance to be overcome when the piston 51 slides downward. This arrangement helps to overcome the problem of the float 6 being light in weight and having difficulty in sliding the piston 51 downwardly.

Specifically, the vent tube is a U-shaped tube 61.

The U-shaped tube 61 is constructed to prevent external seawater from entering the air cylinder 5.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a aquaculture net case, includes aquaculture net case (1), aquaculture net case (1) include support floating frame (11) and fix lower carriage (12) in the seabed, its characterized in that still includes:

the device comprises a plurality of cylinder shells (2), wherein each cylinder shell (2) is arranged between an upper supporting floating frame (11) and a lower supporting frame (12); an up-down sliding telescopic piece is arranged in each cylindrical shell (2), the upper end of each telescopic piece extends out of the top of the cylindrical shell (2), the end part of each telescopic piece is hinged to the upper supporting floating frame (11), and the lower end of each telescopic piece is arranged in the cylindrical shell (2) in a sliding manner;

an annular bait recovery net (42) arranged on the bottom of the cultivation net cage (1); the bait recovery net (42) is connected to each cylindrical shell (2) through a rod, one end of the rod penetrates through a strip-shaped through groove (23) formed in the inner side of each cylindrical shell (2), the end part of the rod is fixedly connected to a transmission mechanism located below the telescopic piece, and the other end of the rod is hinged to a box body located in the aquaculture net box (1); when the telescopic piece slides up and down, the telescopic piece drives the bait collecting mechanism to synchronously and reversely move through the transmission mechanism.

2. An aquaculture net cage according to claim 1, wherein said telescopic elements comprise slide links (22) and slides (21) slidingly arranged inside the cylindrical shell (2); the upper end of the sliding block connecting rod (22) extends out of the top of the cylinder shell (2), the end part of the sliding block connecting rod is hinged to the upper supporting floating frame (11), and the lower end of the sliding block connecting rod is fixedly connected to the sliding block (21); a drainage box (3) is arranged in the aquaculture net cage (1); a drainage box connecting rod (31) is arranged between the drainage box (3) and each sliding block (21); one end of the drainage box connecting rod (31) penetrates through the through groove (23) and the end part of the drainage box connecting rod is fixedly connected to the sliding block (21), and the other end of the drainage box connecting rod is hinged to the drainage box (3); the box body is a water inlet box (4) positioned below the drainage box (3); a corrugated pipe (33) is arranged between the water inlet tank (4) and the water discharge tank (3); the upper edge of the corrugated pipe (33) is fixedly connected to the opening periphery of the lower side surface of the drainage tank (3), and the lower edge of the corrugated pipe is fixedly connected to the opening periphery of the upper side surface of the water inlet tank (4); a plurality of first nozzles (32) are connected to the lower side surface of the drainage tank (3) around the corrugated pipe (33); the water inlet tank (4) is connected with a water inlet pipe (43), and the water inlet pipe (43) is provided with a water inlet one-way valve (44).

3. A net cage according to claim 2, wherein said drainage box (3) is further connected with a plurality of drainage pipes (34); one end of each drain pipe (34) is communicated with the inside of the drain tank (3), and the other end of each drain pipe is connected with a second nozzle (35); each of the second nozzles (35) faces the first netting (13) provided on the adjacent two cylindrical casings (2).

4. A net cage according to claim 3, wherein a second netting (14) is provided between the top of the cylindrical housing (2) and the upper supporting frame (11).

5. A net cage according to claim 4, wherein the transmission mechanism comprises a rotating shaft (7) rotatably arranged on the inner wall of the cylindrical shell (2), the axis of the rotating shaft (7) is perpendicular to the axis of the cylindrical shell (2); a first gear (71) and a second gear (72) are coaxially and fixedly arranged on the rotating shaft (7) respectively; the first gear (71) and the second gear (72) are respectively connected with an upper rack (74) and a lower rack (73) which are arranged in the cylinder shell (2) in a sliding way in a meshing way; the upper rack (74) and the lower rack (73) are respectively positioned at two sides of the rotating shaft (7); the upper end of the upper rack (74) is fixedly arranged on the sliding block (21), and the lower end is arranged in a suspended manner; the two ends of the lower rack (73) are respectively suspended, and the lower rack (73) is fixedly connected with a rod connected with a bait recovery net (42).

6. An aquaculture cage according to claim 5, wherein said first gear wheel (71) has a smaller number of teeth than said second gear wheel (72).

7. The aquaculture net cage according to claim 6, wherein the sliding block (21) is provided with a notch (211) which is positioned right above the lower rack (73), and the size of the cross section of the notch (211) is larger than that of the cross section of the lower rack (73).

8. A net cage according to any one of claims 1 to 7, wherein the upper supporting floating frame (11) is hinged with a floating body (6); an air cylinder (5) is fixedly arranged on the cylinder shell (2), a piston (51) is arranged in the air cylinder (5) in a sliding manner, and a piston rod (52) is fixedly arranged on the piston (51); the upper end of the piston rod (52) extends out of the top of the air cylinder (5), the end part of the piston rod is hinged on the floating body (6), and the lower end of the piston rod is fixedly arranged on the piston (51); the air cylinder (5) is respectively connected with an air inlet pipe and an air outlet pipe; a connecting hose (62) is connected between the floating body (6) and the air inlet pipe, the upper end of the connecting hose (62) is connected with a vent pipe arranged on the upper side surface of the floating body (6), and the lower end of the connecting hose is connected with the air inlet pipe; one end of the exhaust pipe is communicated with the inside of the inflator (5), and the other end of the exhaust pipe extends into the aquaculture net cage (1).

9. An aquaculture net cage according to claim 8, wherein said piston (51) divides the interior of the gas cylinder (5) into an upper gas chamber (53) and a lower gas chamber (54); the air inlet pipe comprises an upper air inlet pipe (55) and a lower air inlet pipe (57); one end of the upper air inlet pipe (55) is respectively communicated with the lower end of the connecting hose (62) and the upper end of the lower air inlet pipe (57) through a three-way pipe, and the other end of the upper air inlet pipe is communicated with the upper air cavity (53); an upper air inlet check valve (551) is arranged on the upper air inlet pipe (55); the lower end of the lower air inlet pipe (57) is communicated with a lower air cavity (54), and a lower air inlet one-way valve (571) is arranged on the lower air inlet pipe (57); the exhaust pipe comprises an upper exhaust pipe (56) and a lower exhaust pipe (58); one end of the upper exhaust pipe (56) is communicated with the upper air cavity (53), the other end of the upper exhaust pipe is positioned below the bottom of the breeding net cage (1), and an upper exhaust check valve (561) is arranged on the upper exhaust pipe (56); one end of the lower exhaust pipe (58) is communicated with the lower air cavity (54), and the other end of the lower exhaust pipe extends into the middle part of the aquaculture net cage (1); the lower exhaust pipe (58) is provided with a lower exhaust pipe one-way valve (581).

10. An aquaculture cage according to claim 9, wherein said aeration pipes are U-shaped pipes (61).