Sampling observation net cage for comprehensive breeding of rice and crabs

Abstract

The invention discloses a sampling observation net cage for comprehensive breeding of rice and crabs, and relates to the technical field of sampling equipment for breeding of rice and crabs, the sampling observation net cage comprises a fixed base, an L-shaped plate, an n-shaped supporting table, a first net cage, a second net cage, a driving handle, a top plate, a platform, a draining mechanism, an inclination mechanism, a limiting mechanism, a lifting mechanism and an opening and closing mechanism, the same draining mechanism is arranged on the left side wall and the right side wall of the first net cage, the platform is driven by the lifting mechanism to ascend and descend, the draining mechanism is limited through the limiting mechanism, the second net cage is driven by the draining mechanism to be automatically lifted, redundant water can flow out of a water tank of the second net cage, more labor is saved, and the water draining efficiency is improved. The lifting mechanism automatically lifts the platform along with the work of the draining mechanism, so that the river crabs in the second net cage are conveyed to the front of a user, and observation is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of sampling equipment for rice-crab farming, and particularly relates to a sampling observation net cage for integrated rice-crab farming. Background Art

[0002] Rice-crab symbiosis is an ecological planting and breeding mode that combines rice planting and river-crab farming. Through the symbiotic relationship between river crabs and rice, it realizes double benefits of ecology and economy. This mode can not only reduce the use of chemical fertilizers and pesticides, improve the quality of rice and river crabs, but also effectively utilize land and water resources to achieve a double harvest. Usually, in the rice-crab symbiotic farming system, there are two ways to breed river crabs. One is free-range farming, and the other is intensive farming. During the farming process, workers need to regularly sample and observe the farmed crabs to understand the health status of the river crabs.

[0003] Free-range farming means putting crab seedlings into the paddy field for farming. Although this method can expand the activity range of crab seedlings, enabling more rice to receive the fertilization of river-crab feces, its disadvantage is that when the river crabs reach maturity, there will be a large number of river crabs in the paddy field. Catching river crabs requires a lot of manpower, and the health status of free-range river crabs cannot be observed in real time. If some river-crab corpses remaining in the paddy field are not found in time, it will cause the paddy field to smell bad. Therefore, the intensive farming method is adopted. Currently, intensive farming usually only uses fishing nets to control the movement range of river crabs. The crab seedlings are put into the net, and then the net is put into the water channel of the paddy field where rice is planted. Although this method greatly restricts the movement of river crabs, when sampling and observation are needed, the net needs to be retracted. When there are a large number of river crabs in the net, retracting the net will become extremely laborious.

[0004] To solve the above problems, a sampling observation net cage for integrated rice-crab farming is proposed. Summary of the Invention

[0005] In view of the above problems, the present invention provides a sampling observation net cage for integrated rice-crab farming, which solves the problem that in the existing intensive farming, usually only fishing nets are used to control the movement range of river crabs. The crab seedlings are put into the net, and then the net is put into the water channel of the paddy field where rice is planted. Although this method greatly restricts the movement of river crabs, when sampling and observation are needed, the net needs to be retracted. When there are a large number of river crabs in the net, retracting the net will become extremely laborious.

[0006] The technical solution adopted by the present invention is as follows: It includes a fixed base, an L-shaped plate, an n-shaped support platform, a first net cage, a second net cage, a driving handle, a top plate, a platform, a water drainage mechanism, an inclination mechanism, a limiting mechanism, a lifting mechanism, and an opening and closing mechanism; On both sides of the upper end of the fixed base, L-shaped plates are respectively movably arranged. A U-shaped support platform is fixedly arranged between the vertical plates of the two L-shaped plates. The two vertical plates of the U-shaped support platform are respectively fixedly connected to the inner walls of the vertical plates of the two L-shaped plates; An inclination mechanism is arranged at the upper end of the fixed base, and the two L-shaped plates are both driven to rotate by the inclination mechanism; A first net box is communicated with the upper end of the horizontal plate of the U-shaped support platform. A second net box is movably arranged in the first net box. A water draining mechanism is arranged on both the left side wall and the right side wall of the first net box. The second net box is driven to move by the water draining mechanism, and the inclination mechanism is driven to work by the water draining mechanism; A top plate is movably arranged at the top end of the second net box. The top plate is driven to move by an opening and closing mechanism, and the opening and closing mechanism is driven to work by the water draining mechanism; A platform is movably arranged in the second net box. The platform is driven to lift by a lifting mechanism, and the top plate drives the lifting mechanism to work through movement; The water draining mechanism is limited by a limiting mechanism.

[0007] Further, the lifting mechanism includes a first connecting rod and a connecting plate; A first gap is respectively left between the left side wall and the right side wall of the platform and the left inner side wall and the right inner side wall of the second net box. Two first connecting rods are respectively movably arranged in the two first gaps; The first ends of the two first connecting rods on the same side are respectively rotatably connected to the rear end and the middle end of the side wall of the platform on the same side, and the second ends of the two first connecting rods on the same side are respectively rotatably connected to the rear end and the middle end of the side wall of the top plate on the same side; A connecting plate is arranged at the lower end of the front wall of the top plate, and the rear wall of the connecting plate is detachably in contact with the front wall of the second net box; The connecting plate is driven to slide by the opening and closing mechanism; The bottom end of the platform is connected to the inner bottom wall of the second net box through a plurality of telescopic rods; A plurality of first water troughs are arranged on the platform, and a plurality of second water troughs are arranged on the bottom wall of the second net box. A plurality of the first water troughs and a plurality of the second water troughs are detachably in contact with each other.

[0008] Further, the opening and closing mechanism includes a rack plate, a first straight gear, a second straight gear, a first guide rod, a first extension plate, and a second extension plate; On the left and right side walls at the top of the second net cage, first extension plates are respectively vertically provided. At the lower ends of the two first extension plates, second extension plates are respectively vertically provided. Between the inner walls of the two second extension plates and the left and right side walls of the second net cage, second gaps are left. The left and right side walls of the first net cage are respectively slidably arranged in the two second gaps; At both ends of the rear wall of the connecting plate, first guide rods are respectively fixedly provided. The two first guide rods are respectively slidably and penetratingly connected with the front walls of the two second extension plates; At both ends of the rear wall of the connecting plate, rack plates are respectively vertically provided. The two rack plates are respectively arranged outside the two first guide rods. The two rack plates are respectively slidably arranged on the outer side walls of the two second extension plates; At the lower ends of the two rack plates, first spur gears are respectively engaged. The two first spur gears are respectively rotatably arranged on the outer side walls of the two second extension plates through first rotating shafts; At the lower ends of the two first spur gears, second spur gears are respectively engaged. The two second spur gears are respectively rotatably arranged on the outer side walls of the two second extension plates through second rotating shafts; Both of the two second rotating shafts are driven to rotate by the water draining mechanism.

[0009] Further, the water draining mechanism includes a driving rod, a rotating handle, a first T-shaped slider, a second connecting rod, a second T-shaped slider, a second guide rod, an L-shaped slider, and a rectangular block; On the two second rotating shafts, the first ends of the second connecting rods are respectively fixedly sleeved. The two second connecting rods are respectively arranged inside the two second spur gears; On both sides of the upper end of the cross plate of the n-shaped support platform, first T-shaped chutes are respectively provided. In the two first T-shaped chutes, the cross plates of the first T-shaped sliders are respectively slidably arranged. The second ends of the two second connecting rods are respectively rotatably connected to the inner walls of the vertical rods of the two first T-shaped sliders; On the upper ends of the cross plates of the two L-shaped plates, second T-shaped chutes are respectively provided. In the two second T-shaped chutes, the cross plates of the second T-shaped sliders are respectively slidably arranged; Between the two first T-shaped chutes and the two second T-shaped chutes, L-shaped chutes are respectively communicated; The vertical chutes of the two L-shaped chutes are respectively arranged in the vertical plates of the two L-shaped plates; The end of the vertical chute of the L-shaped chute on the same side is communicated with the horizontal chute of the first T-shaped chute on the same side. The end of the horizontal chute of the L-shaped chute on the same side is communicated with the horizontal chute of the second T-shaped chute on the same side; Two L-shaped sliding blocks that are respectively matched with the two L-shaped sliding grooves are slidably arranged therein. The vertical rods and horizontal rods of the L-shaped sliding blocks on the same side are respectively fixedly connected to the horizontal rods of the first T-shaped sliding block and the horizontal rods of the second T-shaped sliding block on the same side; The top ends of the vertical rods of the two second T-shaped sliding blocks are respectively vertically provided with the first ends of two second guide rods. Rectangular blocks are respectively slidably sleeved on the side walls of the two second guide rods; The first ends of the driving rods are respectively rotatably arranged on the outer walls of the two rectangular blocks. The middle ends of the two driving rods are respectively rotatably arranged on the left side wall and the right side wall of the first wire cage through third rotating shafts; The second ends of the two driving rods are respectively rotatably provided with rotating handles on their inner walls; A plurality of third water tanks are arranged on the bottom wall of the first wire cage. The plurality of third water tanks are detachably in contact with the plurality of second water tanks; The two second guide rods respectively drive the tilting mechanism to work through sliding.

[0010] Further, the tilting mechanism includes a bevel platform, fixed blocks, wheel frames, and rollers; The second ends of the two second guide rods are respectively fixedly provided with fixed blocks. The two fixed blocks are respectively detachably in contact with the top walls of the two rectangular blocks. The first ends of the wheel frames are respectively vertically arranged on the outer walls of the two fixed blocks. The second ends of the two wheel frames are respectively rotatably provided with rollers on their inner walls; Bevel platforms are respectively arranged on the left side wall and the right side wall of the fixed base. The two L-shaped plates are respectively movable between the two bevel platforms; The rear ends of the horizontal plates of the two L-shaped plates are respectively rotatably connected to the low-end side walls of the two bevel platforms; The two rollers respectively roll on the inclined walls of the two bevel platforms.

[0011] Furthermore, the limiting mechanism includes fixed rods, rotating rods, and hooks; The upper ends of the vertical plates of the two L-shaped plates are respectively fixedly provided with fixed rods. The front ends of the two fixed rods are respectively provided with inclined plates; The upper ends of the two fixed rods are respectively movably provided with rotating rods. The first ends of the two rotating rods are respectively rotatably arranged on the inner walls of the two fixed blocks through fourth rotating shafts; The second ends of the two rotating rods are respectively provided with hooks that cooperate with the bevel platforms. The two hooks are respectively detachably in contact with the two inclined plates.

[0012] Advantages of the present invention: The second net cage of the present invention is automatically lifted under the drive of the water draining mechanism, and the excess water will flow out from the water tank of the second net cage, thereby reducing the applied force. The lifting mechanism automatically raises the platform as the water draining mechanism works, so as to convey the river crabs in the second net cage to the user. The opening and closing mechanism of the present invention can open the top plate of the device while pulling up the second net cage with the water draining mechanism, facilitating observation and sampling. The tilting mechanism of the present invention can slightly tilt the device while pulling up the second net cage with the water draining mechanism, enabling the river crabs in the second net cage to slide onto the platform and be conveyed to the user by the platform.

[0013] In addition to the purposes, features and advantages described above, the present invention has other purposes, features and advantages. The following will refer to the drawings to further elaborate on the present invention in detail. Brief Description of the Drawings

[0014] The drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0015] Figure 1 Schematic diagram of the overall structure of the present invention; Figure 2 Side view of the overall structure of the present invention; Figure 3 Front cross-sectional view of the overall structure of the present invention; Figure 4 Schematic diagram of the positions of the first T-shaped chute and the second T-shaped chute of the present invention; Figure 5 Schematic diagram of the working principle of the water draining mechanism of the present invention; Figure 6 Installation schematic diagram of the second net cage of the present invention; Figure 7 Schematic diagram of the overall structure of the tilting mechanism of the present invention; Figure 8 Front cross-sectional view of the n-shaped support platform, the first net cage, and the L-shaped plate of the present invention; Figure 9 Perspective view of the partial structure of the present invention; Figure 10 Activity schematic diagram of the platform of the present invention; Figure 11 Schematic diagram of the position of the L-shaped chute of the present invention.

[0016] Reference numerals: 1 is a fixed base, 2 is an inclined platform, 3 is an n-shaped support platform, 4 is a first net cage, 5 is an L-shaped plate, 6 is a driving handle, 7 is a rotating handle, 8 is a top plate, 9 is a platform, 10 is a first connecting rod, 11 is a rack plate, 12 is a first spur gear, 13 is a second spur gear, 14 is a second connecting rod, 15 is a fixed block, 16 is a second guide rod, 17 is a rectangular block, 18 is a wheel frame, 19 is a rotating rod, 20 is a first T-shaped slider, 21 is an L-shaped slider, 22 is a second net cage, 23 is a first guide rod; 301 is a first T-shaped chute, 302 is an L-shaped chute; 501 is a second T-shaped chute, 502 is a fixed rod, 5021 is an inclined plate; 801 is a connecting plate; 1601 is a second T-shaped slider; 1801 is a roller; 2201 is a first extension plate, 2202 is a second extension plate. Detailed implementation mode

[0017] In order to make the purpose, technical solutions and advantages of the invention more clear and understandable, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] In the description of the invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0019] Refer to Figures 1 to 11 , a sampling and observation net cage for integrated rice-crab farming, comprising a fixed base 1, an L-shaped plate 5, an n-shaped support platform 3, a first net cage 4, a second net cage 22, a driving handle 6, a top plate 8, a platform 9, a water drainage mechanism, an inclination mechanism, a limiting mechanism, a lifting mechanism, and an opening and closing mechanism; On both sides of the upper end of the fixed base 1, L-shaped plates 5 are respectively movably installed. Between the vertical plates of the two L-shaped plates 5, an n-shaped support platform 3 is fixedly installed. The two vertical plates of the n-shaped support platform 3 are respectively fixedly connected to the inner walls of the vertical plates of the two L-shaped plates 5. The fixed base 1 is a support component of this device, which has a certain mass itself and is used to lower the center of gravity of the device and prevent tipping. The two L-shaped plates 5 are used to fix the n-shaped support platform 3, and the n-shaped support platform 3 is used to support the subsequent first net cage 4; A tilting mechanism is installed at the upper end of the fixed base 1, and the two L-shaped plates 5 are driven to rotate by the tilting mechanism. The two L-shaped plates 5 start to tilt under the drive of the tilting mechanism, and drive all the components installed on the n-shaped support platform 3 to tilt synchronously; The upper end of the horizontal plate of the n-shaped support platform 3 is connected to the first net box 4, and the second net box 22 is movably installed in the first net box 4. The same drainage mechanism is installed on the left and right walls of the first net box 4. The second net box 22 is driven to move by the drainage mechanism, and the tilting mechanism is driven to work by the drainage mechanism. The first net box 4 is always below the water surface, providing a certain activity space for river crabs and limiting their escape. The second net box 22 can be lifted from the first net box 4 and separated from the water surface under the drive of the drainage mechanism to achieve a drainage effect; A top plate 8 is movably installed at the top of the second net cage 22. The top plate 8 is driven to move by an opening and closing mechanism, and the opening and closing mechanism is driven to work by a drainage mechanism. There are air holes on the top of the top plate 8, which can provide flowing air for the crabs when closed. When opened, it is convenient for users to observe and sample the crabs in the second net cage 22. A platform 9 is movably installed in the second net box 22. The platform 9 is driven to rise and fall by a lifting mechanism. The top plate 8 movably drives the lifting mechanism to work. The platform 9 can rise and fall by itself under the drive of the lifting mechanism. The river crabs in the second net box 22 will be tilted onto the platform under the operation of the tilting mechanism, and then sent to the opening of the second net box 22 by the platform, so that users can take them out conveniently. The drain mechanism is limited by a limiting mechanism.

[0020] The lifting mechanism comprises a first connecting rod 10 and a connecting plate 801; A first gap is left between the left and right walls of the platform 9 and the left inner wall and right inner wall of the second net box 22, respectively, and two first connecting rods 10 are movably installed in the two first gaps; The first ends of the two first connecting rods 10 located on the same side are rotatably connected to the rear end and the middle end of the side wall of the platform 9 located on the same side, and the second ends of the two first connecting rods 10 located on the same side are rotatably connected to the rear end and the middle end of the side wall of the top plate 8 located on the same side; A connecting plate 801 is installed at the lower end of the front wall of the top plate 8, and the rear wall of the connecting plate 801 is in detachable contact with the front wall of the second net box 22; The connecting plate 801 is driven to slide by the opening and closing mechanism; The bottom end of the platform 9 is connected to the inner bottom wall of the second net box 22 via a plurality of telescopic rods; The platform 9 is provided with a plurality of first water tanks, and the bottom wall of the second net box 22 is provided with a plurality of second water tanks. The plurality of first water tanks and the plurality of second water tanks are detachably contacted with each other. The connecting plate 801 starts to slide back and forth under the drive of the opening and closing mechanism. Figure 1, when the connecting plate 801 slides forward, the two first linkages 10 on both sides thereof start to deflect upward, and drive the platform 9 to slide upward during the deflection process. A number of telescopic rods ensure the sliding track of the platform 9 and ensure that it will not break away during the sliding process. The hairy crabs located at the upper end of the platform 9 will be taken out of the second net cage 22 during the rising process of the platform 9, facilitating the observation thereof.

[0021] The opening and closing mechanism includes a rack plate 11, a first spur gear 12, a second spur gear 13, a first guide rod 23, a first extension plate 2201, and a second extension plate 2202; On the left and right side walls of the top end of the second net cage 22, first extension plates 2201 are respectively vertically installed. At the lower ends of the two first extension plates 2201, second extension plates 2202 are respectively vertically installed. Second gaps are respectively left between the inner walls of the two second extension plates 2202 and the left and right side walls of the second net cage 22. The left and right side walls of the first net cage 4 are respectively slidably arranged in the two second gaps; At both ends of the rear wall of the connecting plate 801, first guide rods 23 are respectively fixedly installed. The two first guide rods 23 are respectively slidably penetrated and connected with the front walls of the two second extension plates 2202; At both ends of the rear wall of the connecting plate 801, rack plates 11 are respectively vertically installed. The two rack plates 11 are respectively arranged outside the two first guide rods 23, and the two rack plates 11 are respectively slidably arranged on the outer side walls of the two second extension plates 2202; At the lower ends of the two rack plates 11, first spur gears 12 are respectively meshingly installed. The two first spur gears 12 are respectively rotatably arranged on the outer side walls of the two second extension plates 2202 through first rotating shafts; At the lower ends of the two first spur gears 12, second spur gears 13 are respectively meshingly installed. The two second spur gears 13 are respectively rotatably arranged on the outer side walls of the two second extension plates 2202 through second rotating shafts; Both of the two second rotating shafts are driven to rotate by the water draining mechanism. The two second rotating shafts start to rotate under the drive of the water draining mechanism, and drive the second spur gears 13 on both sides to start rotating during the rotation process. The second spur gears 13 on both sides drive the first spur gears 12 on both sides to start rotating respectively through rotation. It should be noted that since the rotation angle of the second rotating shaft driven by the water draining mechanism is limited, the diameter of the second spur gear 13 needs to be larger than that of the first spur gear 12, so as to achieve a certain acceleration effect on the first spur gear 12. The first spur gears 12 on both sides drive the rack plates 11 on both sides to start sliding respectively during the rotation process. The connecting plate 801 fixedly connected to the two rack plates 11 can start to slide under the drive of the two rack plates 11 at this time, and the top cover 8 fixedly connected to the connecting plate 801 can also slide on the upper end of the second net cage 22 to achieve the opening and closing effect.

[0022] The water draining mechanism includes a driving rod 6, a rotating handle 7, a first T-shaped slider 20, a second connecting rod 14, a second T-shaped slider 1601, a second guide rod 16, an L-shaped slider 21, and a rectangular block 17; The first ends of the two second connecting rods 14 are respectively fixedly sleeved on the two second rotating shafts, and the two second connecting rods 14 are respectively arranged inside the two second spur gears 13; On both sides of the upper end of the cross plate of the n-shaped support platform 3, there are respectively provided first T-shaped chutes 301. The cross plates of the first T-shaped sliders 20 are respectively slidably installed in the two first T-shaped chutes 301, and the second ends of the two second connecting rods 14 are respectively rotatably connected to the inner walls of the vertical rods of the two first T-shaped sliders 20; On the upper ends of the cross plates of the two L-shaped plates 5, there are respectively provided second T-shaped chutes 501. The cross plates of the second T-shaped sliders 1601 are respectively slidably installed in the two second T-shaped chutes 501; L-shaped chutes 302 are respectively communicated between the two first T-shaped chutes 301 and the two second T-shaped chutes 501; The vertical chutes of the two L-shaped chutes 302 are respectively arranged in the vertical plates of the two L-shaped plates 5; The end of the vertical chute of the L-shaped chute 302 on the same side is communicated with the horizontal chute of the first T-shaped chute 301 on the same side, and the end of the horizontal chute of the L-shaped chute 302 on the same side is communicated with the horizontal chute of the second T-shaped chute 501 on the same side; In the two L-shaped chutes 302, there are respectively slidably installed L-shaped sliders 21 that cooperate with them. The vertical rods and horizontal rods of the L-shaped sliders 21 on the same side are respectively fixedly connected to the horizontal rods of the first T-shaped sliders 20 and the horizontal rods of the second T-shaped sliders 1601 on the same side; The first ends of the two second guide rods 16 are respectively vertically installed at the tops of the vertical rods of the two second T-shaped sliders 1601, and rectangular blocks 17 are respectively slidably sleeved on the side walls of the two second guide rods 16; The first ends of the two driving rods 6 are respectively rotatably installed on the outer walls of the two rectangular blocks 17, and the middle ends of the two driving rods 6 are respectively rotatably arranged on the left side wall and the right side wall of the first wire cage 4 through third rotating shafts; The second ends of the two driving rods 6 are respectively rotatably installed with rotating handles 7 on their inner walls; On the bottom wall of the first wire cage 4, there are provided a number of third water troughs, and the number of third water troughs is detachably in contact with the number of second water troughs; The two second guide rods 16 respectively work through a sliding drive inclination mechanism. The user holds the rotating handles 7 with both hands and applies a downward force, and the driving rods 6 on both sides start to rotate downward. Refer to Figure 7, during the downward rotation of the two drive rods 6, the second guide rods 16 are pushed to the left by the two rectangular blocks 17. During the leftward movement of the two second guide rods 16, the second T-shaped sliders 1601 fixedly connected thereto are driven to slide leftward along the two second T-shaped chutes 501 respectively. During the leftward sliding of the second T-shaped sliders 1601 on both sides, the driving force of the leftward sliding is transmitted to the first T-shaped sliders 20 through the L-shaped sliders 21 on both sides respectively. At this time, the two first T-shaped sliders 20 have the ability to slide leftward. During the leftward sliding of the two first T-shaped sliders 20 along the first T-shaped chutes 301, the two second connecting rods 14 on both sides are driven to start deflecting leftward respectively. During the leftward deflection of the two second connecting rods 14, the second net cage 22 is lifted upward, and the bottom wall of the second net cage 22 is completely separated from the water surface. At this time, the water in the second net cage 22 will drain off, and the hairy crabs will be completely exposed. During the deflection of the two second connecting rods 14 on both sides, the two second rotating shafts are also driven to rotate, so that the top cover 8 slides out to the left. At the same time that the top cover 8 slides out to the left, the platform 9 will also rise, sending the drained hairy crabs to the surface of the second net cage 22.

[0023] The tilting mechanism includes an inclined platform 2, a fixed block 15, a wheel frame 18, and a roller 1801; The second ends of the two second guide rods 16 are respectively fixedly installed with fixed blocks 15. The two fixed blocks 15 are detachably in contact with the top walls of the two rectangular blocks 17 respectively. The first ends of the two wheel frames 18 are respectively vertically installed on the outer walls of the two fixed blocks 15. The second ends of the two wheel frames 18 are respectively rotatably installed with rollers 1801; The left side wall and the right side wall of the fixed base 1 are respectively installed with inclined platforms 2, and the two L-shaped plates 5 are respectively movable between the two inclined platforms 2; The rear ends of the horizontal plates of the two L-shaped plates 5 are respectively rotatably connected to the low-end side walls of the two inclined platforms 2; The two rollers 1801 respectively roll on the inclined walls of the two inclined platforms 2. Refer to Figure 1, when the second guide rods 16 on both sides slide leftward, the fixed blocks 15 fixedly installed on the second guide rods 16 will also start to slide leftward, and the wheel frames 18 will also start to slide leftward along with the fixed blocks 15. During the leftward sliding process of the fixed blocks 15 on both sides, the rollers 1801 are driven to start rolling upward along the inclined platforms 2. Since the two L-shaped plates 5 are hinged to one end of the two inclined platforms 2, when the rollers 1801 on both sides roll upward along the inclined platforms 2, they start to drive the two L-shaped plates 5 to rotate and tilt. The crabs in the second net cage 22 will fall onto the platform 9 as the second net cage 22 gradually tilts, and are sent by the platform 9 to the opening of the second net cage 22. It should be noted that since the distance between the platform 9 and the top plate 8 becomes smaller and smaller during the rising process of the platform 9, there will be a situation where some of the rice crabs on the platform 9 are still below the top plate 8 as the platform 9 rises. To prevent the continuous rising of the platform 9 from squeezing the rice crabs between the top plate 8 and the platform 9, a certain gap is left between the front wall of the platform 9 and the front wall of the second net cage 22. The staff can poke the rice crabs on the platform 9 and below the top plate 8 from the first gap to avoid damaging the crabs.

[0024] The limiting mechanism includes a fixed rod 502, a rotating rod 19, and a hook; Fixed rods 502 are respectively fixedly installed at the upper ends of the vertical plates of the two L-shaped plates 5, and inclined plates 5021 are respectively installed at the front ends of the two fixed rods 502; Rotating rods 19 are respectively movably installed at the upper ends of the two fixed rods 502, and the first ends of the two rotating rods 19 are respectively rotatably arranged on the inner walls of the two fixed blocks 15 through fourth rotating shafts; Hooks that cooperate with the inclined platforms are respectively installed at the second ends of the two rotating rods 19, and the two hooks are respectively in detachable contact with the two inclined plates 5021. Refer to Figure 1 , as continuous downward pressure is applied to the driving rods 6 on both sides, the fixed blocks 15 on both sides continuously slide leftward and drive the rotating rods 19 to slide above the fixed rods 502 during the sliding process. When the user presses the driving rods 6 downward to the limit position, the hooks at the front ends of the rotating rods 19 slide out of the fixed rods 502 and start to fall downward under the action of gravity. At this time, the user stops applying pressure to the driving rods 6 on both sides, and at this time, the hooks can just hook onto the inclined plates 5021 at the front ends of the fixed rods 502, thus realizing the limiting function.

[0025] The implementation method of the present invention: Fix this device on the canal ground between the rice fields to ensure that the first net cage 4 and the second net cage 22 in this device can be below the water surface; Put the crabs for breeding into the second net cage 22 from the top. The side walls of the second net cage 22 and the first net cage 4 are both in communication with the water flow; When observing and sampling cultured Chinese mitten crabs, the user holds the rotating handle 7 with both hands and applies downward pressure. During this process, the second net cage 22 rises from the first net cage 4 with the crabs and gradually emerges from the water surface. At the same time, the two L-shaped plates 5 start to tilt the first net cage 4 and the second net cage 22. The crabs in the second net cage 22 accumulate on the side close to the user under this tilt and are on the platform 9. As the user continues to apply force, the top cover 8 at the upper end of the second net cage 22 gradually opens, exposing the crabs inside. The crabs on the platform 9 will gradually lift upward as the top cover 8 opens, raising the crabs piled on the platform in front of the user. When the user continues to apply force to a certain extent and then releases the rotating handles 7 on both sides, the rollers 1801 on both sides of the device will slightly roll down along the inclined platforms 2 on both sides under the action of gravity. At the same time, the hooks on both sides just hook the inclined plates 5021 on both sides, preventing the continuous rolling down of the rollers 1801 and playing a limiting role. At this time, the user can conduct sampling inspections and other work on the crabs that have risen in front. After the sampling is completed, the user only needs to pull the two rotating rods in front of the device forward and lift them upward to disengage the hooks from the inclined plates 5021. At this time, the rollers 1801 are no longer blocked and slide to the lowest point of the inclined platform 2 under the action of gravity, and the device is reset. The user can place multiple devices in different water channels to expand the breeding scale, thus achieving a double harvest of rice and crabs.

[0026] The second net cage of the present invention is automatically lifted under the drive of the water drainage mechanism, and the excess water will flow out from the water tank of the second net cage, thereby reducing the applied force. The lifting mechanism automatically raises the platform as the water drainage mechanism works, thus conveying the crabs in the second net cage in front of the user. The opening and closing mechanism of the present invention can open the top plate of the device while pulling up the second net cage with the water drainage mechanism, facilitating observation and sampling. The tilting mechanism of the present invention can slightly tilt the device while pulling up the second net cage with the water drainage mechanism, enabling the crabs in the second net cage to slide onto the platform and be conveyed in front of the user by the platform.

[0027] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sampling and observation net cage for integrated rice-crab farming, characterized by: It comprises a fixed base (1), an L-shaped plate (5), an N-shaped support platform (3), a first net box (4), a second net box (22), a driving handle (6), a top plate (8), a platform (9), a drainage mechanism, a tilting mechanism, a limiting mechanism, a lifting mechanism, and an opening and closing mechanism; L-shaped plates (5) are movably provided on both sides of the upper end of the fixed base (1), an n-shaped support platform (3) is fixedly provided between the vertical plates of the two L-shaped plates (5), and the two vertical plates of the n-shaped support platform (3) are respectively fixedly connected to the inner walls of the vertical plates of the two L-shaped plates (5); A tilting mechanism is provided at the upper end of the fixed base (1), and the two L-shaped plates (5) are driven to rotate by the tilting mechanism; The upper end of the horizontal plate of the n-shaped support platform (3) is connected to a first net box (4), a second net box (22) is movably arranged in the first net box (4), a same drainage mechanism is arranged on the left and right walls of the first net box (4), the second net box (22) is driven to move by the drainage mechanism, and the tilting mechanism is driven to work by the drainage mechanism; The top of the second net box (22) is movably provided with a top plate (8), the top plate (8) being driven to move by an opening and closing mechanism, and the opening and closing mechanism being driven to work by the drainage mechanism; A platform (9) is movably provided in the second net box (22), the platform (9) is driven to rise and fall by a lifting mechanism, and the top plate (8) drives the lifting mechanism to work by movement; The drainage mechanism is limited by a limiting mechanism.

2. The sampling and observation net cage for integrated rice-crab farming according to claim 1, characterized in that: The lifting mechanism comprises a first connecting rod (10) and a connecting plate (801); A first gap is left between the left side wall and the right side wall of the platform (9) and the left inner side wall and the right inner side wall of the second net box (22), respectively, and two first connecting rods (10) are movably arranged in the two first gaps; The first ends of the two first connecting rods (10) located on the same side are rotatably connected to the rear end and the middle end of the side wall of the platform (9) located on the same side, and the second ends of the two first connecting rods (10) located on the same side are rotatably connected to the rear end and the middle end of the side wall of the top plate (8) located on the same side; A connecting plate (801) is provided at the lower end of the front wall of the top plate (8), and the rear wall of the connecting plate (801) is in detachable contact with the front wall of the second net box (22); The connecting plate (801) is driven to slide by the opening and closing mechanism; The bottom end of the platform (9) is connected to the inner bottom wall of the second net box (22) via a plurality of telescopic rods; The platform (9) is provided with a plurality of first water troughs, and the bottom wall of the second net box (22) is provided with a plurality of second water troughs, and the plurality of first water troughs and the plurality of second water troughs are in detachable contact with each other.

3. The sampling and observation net cage for integrated rice-crab farming according to claim 2, characterized in that: The opening and closing mechanism comprises a rack plate (11), a first spur gear (12), a second spur gear (13), a first guide rod (23), a first expansion plate (2201), and a second expansion plate (2202); A first expansion plate (2201) is vertically provided on the left side wall and the right side wall of the top end of the second net box (22), and a second expansion plate (2202) is vertically provided on the lower ends of the two first expansion plates (2201), and a second gap is left between the inner walls of the two second expansion plates (2202) and the left side wall and the right side wall of the second net box (22), and the left side wall and the right side wall of the first net box (4) are slidably arranged in the two second gaps; First guide rods (23) are fixedly provided at both ends of the rear wall of the connecting plate (801), and the two first guide rods (23) are respectively slidably connected to the front walls of the two second expansion plates (2202); Rack plates (11) are respectively vertically provided at both ends of the rear wall of the connecting plate (801), the two rack plates (11) are respectively provided on the outside of the two first guide rods (23), and the two rack plates (11) are respectively slidably provided on the outer side walls of the two second expansion plates (2202); The lower ends of the two rack plates (11) are respectively meshed with first spur gears (12), and the two first spur gears (12) are respectively rotatably arranged on the outer side walls of the two second expansion plates (2202) via first rotating shafts; The lower ends of the two first spur gears (12) are respectively meshed with second spur gears (13), and the two second spur gears (13) are respectively rotatably arranged on the outer side walls of the two second expansion plates (2202) via second rotating shafts; The two second rotating shafts are both driven to rotate by the drainage mechanism.

4. The sampling and observation net cage for integrated rice-crab farming according to claim 3, characterized in that: The drainage mechanism comprises a driving rod (6), a rotating handle (7), a first T-shaped slider (20), a second connecting rod (14), a second T-shaped slider (1601), a second guide rod (16), an L-shaped slider (21), and a rectangular block (17); The first ends of the second connecting rods (14) are respectively fixedly sleeved on the two second rotating shafts, and the two second connecting rods (14) are respectively arranged on the inner sides of the two second spur gears (13); First T-shaped slide grooves (301) are respectively provided on both sides of the upper end of the horizontal plate of the n-shaped support platform (3), and horizontal plates with first T-shaped sliders (20) are respectively slidably arranged in the two first T-shaped slide grooves (301), and the second ends of the two second connecting rods (14) are respectively rotatably connected to the inner walls of the vertical rods of the two first T-shaped sliders (20); The upper ends of the transverse plates of the two L-shaped plates (5) are respectively provided with second T-shaped sliding grooves (501), and the transverse plates provided with second T-shaped sliding blocks (1601) are respectively slidably disposed in the two second T-shaped sliding grooves (501); An L-shaped slide groove (302) is provided between the two first T-shaped slide grooves (301) and the two second T-shaped slide grooves (501) respectively; The vertical grooves of the two L-shaped slide grooves (302) are respectively arranged in the vertical plates of the two L-shaped plates (5); The vertical groove end of the L-shaped chute (302) located on the same side is connected to the horizontal groove of the first T-shaped chute (301) located on the same side, and the horizontal groove end of the L-shaped chute (302) located on the same side is connected to the horizontal groove of the second T-shaped chute (501) located on the same side; L-shaped sliding blocks (21) cooperating therewith are slidably disposed in the two L-shaped sliding grooves (302), and the vertical rod and the horizontal rod of the L-shaped sliding block (21) located on the same side are respectively fixedly connected to the horizontal rod of the first T-shaped sliding block (20) and the horizontal rod of the second T-shaped sliding block (1601) located on the same side; The top ends of the vertical rods of the two second T-shaped sliding blocks (1601) are respectively vertically provided with the first ends of the second guide rods (16), and the side walls of the two second guide rods (16) are respectively slidably sleeved with rectangular blocks (17); The first ends of the driving rods (6) are rotatably mounted on the outer walls of the two rectangular blocks (17), and the middle ends of the two driving rods (6) are rotatably mounted on the left and right walls of the first net box (4) via third rotating shafts; A rotating handle (7) is rotatably provided on the inner wall of the second end of the two driving rods (6); A plurality of third water tanks are provided on the bottom wall of the first net box (4), and the plurality of third water tanks are in detachable contact with the plurality of second water tanks; The two second guide rods (16) respectively drive the tilting mechanism to work by sliding.

5. The sampling and observation net cage for integrated rice-crab farming according to claim 4, characterized in that: The tilting mechanism comprises a tilting platform (2), a fixing block (15), a wheel frame (18), and a roller (1801); A fixing block (15) is fixedly provided at the second ends of the two second guide rods (16), the two fixing blocks (15) are detachably in contact with the top walls of the two rectangular blocks (17), the first ends of the wheel frames (18) are vertically provided on the outer walls of the two fixing blocks (15), and rollers (1801) are rotatably provided on the inner walls of the second ends of the two wheel frames (18); Inclined platforms (2) are respectively provided on the left and right walls of the fixed base (1), and the two L-shaped plates (5) are respectively movable between the two inclined platforms (2); The rear ends of the transverse plates of the two L-shaped plates (5) are rotatably connected to the lower side walls of the two inclined platforms (2) respectively; The two rollers (1801) roll on the inclined walls of the two inclined platforms (2) respectively.

6. The sampling and observation net cage for integrated rice-crab farming according to claim 5, characterized in that: The limiting mechanism comprises a fixed rod (502), a rotating rod (19), and a hook; The upper ends of the vertical plates of the two L-shaped plates (5) are respectively fixed with fixing rods (502), and the front ends of the two fixing rods (502) are respectively provided with inclined plates (5021); The upper ends of the two fixed rods (502) are movably provided with rotating rods (19), and the first ends of the two rotating rods (19) are rotatably provided on the inner walls of the two fixed blocks (15) via fourth rotating shafts; The second ends of the two rotating rods (19) are respectively provided with hooks that cooperate with the inclined platforms, and the two hooks are respectively in detachable contact with the two inclined plates (5021).

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