Fluidized swing type intertidal zone shellfish seeding device and method thereof

Abstract

The application discloses a fluidized swing type tidal zone shell seeding device and a method thereof. The fluidized seeding mechanism and the swing seeding mechanism are arranged adjacently, the seeding outlet of the fluidized seeding mechanism is communicated with the seeding inlet of the swing seeding mechanism, and is used for receiving and sowing the shell seedlings discharged by the fluidized seeding mechanism; the side surface and the lower end surface of the shell seedling storage tank in the fluidized seeding mechanism are both provided with openings, the opening of the lower end surface is communicated with the upper end of the wedge-shaped cavity of the wedge-shaped fluidization chamber, the side surface of the wedge-shaped fluidization chamber is provided with the seeding outlet, the seeding outlet is communicated with the swing seeding mechanism, the lower end of the wedge-shaped cavity of the wedge-shaped fluidization chamber is communicated with the water outlet of the circulating pump, and the water inlet of the circulating pump, the water outlet of the water tank and the side surface opening of the shell seedling storage tank are communicated. The application utilizes the characteristics of non-rotating components and fluid wrapping protection, realizes low-damage seeding, converts the whole rotation of the crank wheel into the reciprocating swing of the seeding pipe, makes the shell seedlings uniformly dispersed in the sowing area, and effectively improves the seeding efficiency and uniformity.

Description

Technical Field

[0001] This invention belongs to the field of fishery machinery and equipment, specifically relating to a fluidized oscillating tidal flat shellfish seeding device and method. Background Technology

[0002] Shellfish aquaculture, as one of the most important ecological and economic industries in my country's coastal areas, occupies an irreplaceable and vital position in marine economic development and ecological environmental protection. Shellfish seeding is a crucial step in the aquaculture process. Currently, seeding of burrowing shellfish is mainly done manually, which suffers from high labor intensity, low production efficiency, and a high rate of shellfish seedling damage. Currently, shellfish seeding devices often use traditional mechanical contact seeding methods. This can cause damage and breakage to smaller shellfish seedlings with lower mechanical strength, such as razor clams. For example, the utility model CN219698766U proposes an external grooved wheel structure. Although this utility model can quantitatively seed through multiple blades driven by a rotating shaft, the shellfish seedlings collide and squeeze with each other within the grooved wheel, causing damage. Furthermore, having only one seeding opening is not conducive to the survival of burrowing shellfish seedlings. Another example is the invention patent CN118077622A, which proposes a centrifugal conical disc structure. This invention patent uses the centrifugal force generated by the high-speed rotation of the conical disc to scatter the shellfish seedlings. Although this invention patent uses EVA shock-absorbing material to reduce damage, its seeding method still cannot avoid damage caused by blade impact and collisions between shellfish seedlings. Therefore, a low-damage, high-efficiency shellfish seeding device suitable for thin-shelled shellfish is needed. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and to propose a fluidized oscillating tidal flat shellfish seeding device.

[0004] The present invention adopts the following technical solution: The present invention includes a fluidized seedling discharge mechanism and a swing seedling sowing mechanism. The fluidized seedling discharge mechanism and the swing seedling sowing mechanism are arranged adjacent to each other and fixedly connected. The discharge port of the fluidized seedling discharge mechanism is connected to the inlet of the swing seedling sowing mechanism. The fluidized seedling discharge mechanism is used to store and fluidize shellfish seedlings, and the swing seedling sowing mechanism is used to receive the shellfish seedlings discharged by the fluidized seedling discharge mechanism and spray and sow them. The fluidized bed discharge mechanism includes a seedling storage tank, a wedge-shaped fluidized chamber, a circulating pump, a water tank, circulating pipelines, a water tank valve, an exhaust valve, an ultrasonic sensor, and a discharge valve. The seedling storage tank has an exhaust port and an inlet on its upper surface. An exhaust valve is installed on the exhaust port for venting the sealed cavity of the seedling storage tank and for adding water and seedlings into the tank, respectively. The seedling storage tank has openings on its side and lower surface. The lower surface of the seedling storage tank is fixedly connected to the wedge-shaped fluidized chamber, which has a wedge-shaped cavity that gradually narrows from top to bottom. The opening is connected to the upper end of the wedge-shaped cavity of the wedge-shaped fluidization chamber. The side of the wedge-shaped fluidization chamber is provided with a seedling discharge port as the seedling discharge port of the fluidization seedling discharge mechanism. An ultrasonic sensor for detecting the concentration of seedlings is installed at the inlet end of the seedling discharge port, and a seedling discharge valve is installed at the outlet end. The seedling discharge valve is connected to the swing seeding mechanism to transport the fluidized seedlings to the swing seeding mechanism. The lower end of the wedge-shaped cavity of the wedge-shaped fluidization chamber is connected to the outlet of the circulation pump. The inlet of the circulation pump, the outlet of the water tank, and the side opening of the seedling storage tank are connected through circulation pipelines. A water tank valve is provided at the outlet of the water tank.

[0005] The oscillating seeding mechanism includes a seeding pipe, a motor, a first transmission shaft, a crank wheel, an oscillating fork, a second transmission shaft, a hose, a support sleeve, a seeding pipe, and a fan-shaped nozzle. The seeding pipe is fixedly connected to the outlet end of the seeding valve and communicates with the seeding valve. The hose is fitted onto the seeding pipe. The hose, seeding pipe, and fan-shaped nozzle are sequentially connected and installed along the seedling conveying direction. The end of the hose away from the fluidized seeding mechanism is connected to the seeding pipe. The support sleeve is fitted onto the seeding pipe. The seedlings discharged by the fluidized seeding mechanism pass through the seeding pipe, hose, and seeding pipe in sequence and are then seeded by the fan-shaped nozzle. The output shaft of the motor is connected to one end of the first transmission shaft via a coupling. The other end of the first transmission shaft is fixed in the central shaft hole of the crank wheel. The surface of the crank wheel is provided with an eccentric hole. One end of the swing fork is fixedly embedded in the eccentric hole, and the other end of the swing fork is fitted into the middle of the second transmission shaft. The upper end of the second transmission shaft is fixed to the lower surface of the support sleeve. It is used to drive the seedling tube to perform horizontal reciprocating motion through the rotation of the crank wheel.

[0006] It also includes a frame, with the fluidized seedling discharge mechanism and the swing seeding mechanism all placed on the frame. The bottom of the circulating pump, water tank and the second drive shaft are all in contact with the frame to ensure that the discharge port of the fluidized seedling discharge mechanism and the inlet of the swing seeding mechanism are at the same height.

[0007] It also includes a flow equalization chamber and a turntable support. The flow equalization chamber has a cavity in the middle. The upper and lower end faces of the flow equalization chamber are fixedly connected to the lower end face of the wedge-shaped fluidization chamber and the upper end face of the circulating pump, respectively. The wedge-shaped cavity of the wedge-shaped fluidization chamber is connected to the outlet of the circulating pump through the cavity of the flow equalization chamber. The turntable support is fixedly connected to the lower end of the second drive shaft, which is used to support the second drive shaft and ensure that the second drive shaft remains stable when it moves with the swing fork.

[0008] The upper surface of the flow equalization chamber is provided with a groove, and a distribution plate is installed in the groove. A filter screen is installed at the side opening of the seedling storage tank.

[0009] The wedge-shaped fluidization chamber has a wedge-shaped structure that is narrow at the bottom, wide at the top, and has a rectangular cross-section. The cross-sectional area increases linearly along the height direction.

[0010] The axis of the seeding tube is parallel to the journal axis of the swing fork and lies on the same vertical reference plane. The angle between the journal axis of the swing fork and the axial axis of the crank wheel is half of the swing angle of the seeding tube.

[0011] A fluidized, oscillating method for seeding shellfish in intertidal zones includes the following steps: S1. With the circulation pump, motor, water tank valve and seedling discharge valve all closed, water is injected into the seedling storage tank until the preset water level is reached, and then the seedlings are added to the seedling storage tank. S2. Turn on the circulation pump. The water flow through the circulation pump outlet carries the shellfish seedlings to the discharge outlet. The ultrasonic sensor detects the concentration of shellfish seedlings at the discharge outlet. If the detected concentration of shellfish seedlings is greater than the maximum value of the preset concentration range, the circulation pump speed is reduced. Otherwise, the circulation pump speed is increased until the concentration of shellfish seedlings at the discharge outlet is within the preset concentration range. S3. Open the seedling discharge valve so that the seedlings enter the swing seeding mechanism from the seedling discharge port with the water flow, and open the water tank valve so that the water in the water tank enters the inlet of the circulating pump. S4. Turn on the motor. The motor drives the crank wheel, swing fork and second transmission shaft to move, which in turn drives the seeding tube and fan-shaped nozzle to swing back and forth. The seedlings pass through the hose and seeding tube in sequence and are then sown by the fan-shaped nozzle.

[0012] In step S1, the preset water level is at least higher than the height of the side opening of the shellfish storage tank.

[0013] The beneficial effects of this invention are as follows: This invention offers significant advantages in protecting shellfish larvae and improving seeding efficiency. Specifically, it uses water as a medium for fluidized seeding, which, compared to traditional seeding methods where mechanical parts directly contact the larvae and are prone to damage during the process, allows the larvae to suspend due to liquid flow. The absence of rotating parts and the fluid-encapsulated protection reduce the damage rate during seeding. Furthermore, the invention utilizes a swinging seeding mechanism to evenly distribute the larvae across the seeding area, avoiding the localized accumulation or sparse distribution problems caused by traditional fixed-direction seeding. This ensures uniform distribution of larvae on the tidal flat surface and increases the seeding width. Additionally, the invention adjusts the seeding trajectory by regulating the swinging frequency and water flow velocity parameters to adapt to potential micro-topographical undulations on the tidal flat surface. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 This is a front view of the present invention.

[0016] Figure 3 This is an isometric cross-sectional schematic diagram of the wedge-shaped fluidization chamber in this invention.

[0017] Figure 4 This is an exploded view of the swing seeding mechanism in this invention.

[0018] Figure 5 This is a schematic diagram of the partial fluidization of the fluidized seedling discharge mechanism in this invention.

[0019] Figure 6 This is a schematic diagram illustrating the completion of the fluidization process in the fluidized seedling discharge mechanism of this invention.

[0020] Figure 7 This is a schematic diagram of the operation of the fluidized swing seeding device in this invention.

[0021] In the diagram: 1. Frame; 2. Seedling storage tank; 3. Wedge-shaped fluidization chamber; 3-1 Seedling outlet; 3-2. Trapezoidal side; 3-3. Rectangular side; 4. Flow equalization chamber; 5. Circulation pump; 6. Water tank; 7. Circulation pipeline; 8. Water tank valve; 9. Air vent valve; 10. Ultrasonic sensor; 11. Seedling outlet valve; 12. Seedling outlet pipe; 13. Motor; 14. First drive shaft; 15. Crank wheel; 16. Swing fork; 17. Second drive shaft; 18. Hose; 19. Support sleeve; 20. Seedling pipe; 21. Fan-shaped nozzle. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1As shown, the present invention includes a fluidized seedling discharge mechanism and a swing seedling sowing mechanism. The fluidized seedling discharge mechanism and the swing seedling sowing mechanism are arranged adjacently and fixedly connected. The seedling discharge port 3-1 of the fluidized seedling discharge mechanism is connected to the seedling inlet of the swing seedling sowing mechanism. The fluidized seedling discharge mechanism is used to store and fluidize the shellfish seedlings, and the swing seedling sowing mechanism is used to receive the shellfish seedlings discharged by the fluidized seedling discharge mechanism and perform swing spraying and sowing. like Figure 2 and Figure 4 As shown, the fluidized bed discharge mechanism includes a seedling storage tank 2, a wedge-shaped fluidized chamber 3, a circulating pump 5, a water tank 6, a circulating pipeline 7, a water tank valve 8, an exhaust valve 9, an ultrasonic sensor 10, and a discharge valve 11. The upper surface of the seedling storage tank 2 has an exhaust port and an inlet. An exhaust valve 9 is installed on the exhaust port, used for venting the sealed cavities of the seedling storage tank 2 and the wedge-shaped fluidized chamber 3, and for adding water and seedlings to the seedling storage tank 2. The side and lower surface of the seedling storage tank 2 have openings. The lower surface of the seedling storage tank 2 is fixedly connected to the wedge-shaped fluidized chamber 3. The wedge-shaped fluidized chamber 3 has a wedge-shaped cavity that gradually narrows from top to bottom. The opening on the lower surface of the seedling storage tank 2 is connected to... The upper end of the wedge-shaped cavity of the wedge-shaped fluidization chamber 3 is connected. The side of the wedge-shaped fluidization chamber 3 is provided with a seedling discharge port 3-1 as the seedling discharge port 3-1 of the fluidization seedling discharge mechanism. An ultrasonic sensor 10 for detecting the concentration of seedlings is installed at the inlet end of the seedling discharge port 3-1 of the fluidization seedling discharge mechanism, and a seedling discharge valve 11 is installed at the outlet end. The seedling discharge valve 11 is connected to the swing seeding mechanism and is used to transport the fluidized seedlings to the swing seeding mechanism. The lower end of the wedge-shaped cavity of the wedge-shaped fluidization chamber 3 is connected to the outlet of the circulation pump 5. The inlet of the circulation pump 5, the outlet of the water tank 6 and the side opening of the seedling storage tank 2 are connected through the circulation pipeline 7. A water tank valve 8 is provided at the outlet of the water tank 6.

[0024] During the fluidization process, the seedling storage tank 2, fluidization chamber 3, flow equalization chamber 4, circulation pump 5 and circulation pipeline 7 form a sealed water body. The air remaining in the fluid circuit will interfere with the flow driven by the subsequent circulation pump 5, which may lead to uneven formation of the fluidized bed. The automatic exhaust valve 9 will remove the air in the cavity, thereby ensuring the stability of the fluidization process in the cavity.

[0025] Specifically, the top end face of the seedling storage tank 2 has a detachable feed inlet that connects to the tank cover. A vertically installed automatic exhaust valve 9 is located on one side of the top end face. An overflow port for circulating water flow is located on one side of the top outer wall near the horizontal opening of the circulating pump 5. A wedge-shaped fluidizing chamber 3 is located at the bottom. The top of the wedge-shaped fluidizing chamber 3 is fixed to the flange portion at the bottom of the seedling storage tank 2 and secured to the frame 1. A seedling discharge port 3-1 is horizontally located on the axial center line of the trapezoidal side 3-2. The outlet of the seedling discharge port 3-1 is horizontally located... Seedling tube 12; the end of the seedling discharge tube 12 near the seedling discharge port 3-1 is connected to a full-bore ball valve, i.e., the seedling discharge valve 11; the bottom of the wedge-shaped fluidization chamber 3 is fixed to the flow equalization chamber 4; the bottom of the flow equalization chamber 4 is provided with rectangular grooves on both sides, which are fixed to the frame 1 through the rectangular grooves, and the bottom is connected to the vertical direct port of the circulation pump 5 through the conveying pipe. The horizontal interface of the circulation pump 5 is provided with a three-way pipe; the vertical direct port of the three-way pipe is connected to the interface on one side of the top outer wall of the seedling storage tank 2 through the circulation pipeline 7, and the horizontal opening is connected to the water tank valve 8 of the water tank 6 through the conveying pipe.

[0026] A sealing ring is provided at the connection between the opening on the lower end face of the seedling storage tank 2 and the upper end of the wedge-shaped cavity of the wedge-shaped fluidization chamber 3. A distribution plate is adhered to the groove on the top end face of the flow equalization chamber 4; a filter screen is adhered to the groove at the interface on the top outer wall of the seedling storage tank 2.

[0027] The inlet of the circulating pump 5, the outlet of the water tank 6, and the side opening of the seedling storage tank 2 are connected through the circulating pipeline 7. Specifically, a three-way valve is used, and the three ports of the three-way valve are connected to the inlet of the circulating pump 5, the outlet of the water tank 6, and the side opening of the seedling storage tank 2 through the pipeline, i.e., the circulating pipeline 7.

[0028] The inner cavities of the seedling storage tank 2, the wedge-shaped fluidization chamber 3, and the flow equalization chamber 4 are interconnected. The central axes of the cavity inside the seedling storage tank 2, the wedge-shaped cavity of the wedge-shaped fluidization chamber 3, the middle cavity of the flow equalization chamber 4, and the outlet of the circulating pump 5 are collinear.

[0029] The oscillating seedling dispensing mechanism includes a seedling discharge pipe 12, a motor 13, a first transmission shaft 14, a crank wheel 15, an oscillating fork 16, a second transmission shaft 17, a flexible hose 18, a support sleeve 19, a seedling dispensing pipe 20, and a fan-shaped nozzle 21. The seedling discharge pipe 12 is fixedly connected to the outlet end of the seedling discharge valve 11 and communicates with the seedling discharge valve 11. The flexible hose 18 is fitted onto the seedling discharge pipe 12. The flexible hose 18, the seedling dispensing pipe 20, and the fan-shaped nozzle 21 are sequentially connected and installed along the seedling conveying direction. The end of the flexible hose 18 away from the fluidized seedling discharge mechanism is connected to the seedling dispensing pipe 20. The support sleeve 19 is fitted onto the seedling dispensing pipe 20. The seedlings discharged by the fluidized seedling discharge mechanism pass sequentially through the seedling discharge pipe 12, the flexible hose 18, and the seedling dispensing pipe 20 before being sown by the fan-shaped nozzle 21. The output shaft of motor 13 is connected to one end of the first transmission shaft 14 via a coupling. The other end of the first transmission shaft 14 is fixed in the central shaft hole of crank wheel 15. The surface of crank wheel 15 is provided with an eccentric hole. One end of swing fork 16 is fixedly embedded in the eccentric hole. The other end of swing fork 16 is fitted into the middle of second transmission shaft 17. The upper end of second transmission shaft 17 is circumferentially fixed to the lower surface of support sleeve 19, and is used to drive seeding tube 20 to perform horizontal reciprocating motion through the rotation of crank wheel 15.

[0030] Specifically, the output shaft of motor 13 is connected to the rear journal of crank wheel 15 via a coupling. A keyway is provided on the front journal for circumferential fixation to crank wheel 15 via a key connection, and a retaining ring is provided on the end face of the front journal for axial limiting. The inclined surface of crank wheel 15 has eccentric holes for bearing installation. The journal of swing fork 16 is supported on crank wheel 15 via spherical bearings installed in the eccentric holes. The axis of the journal of swing fork 16 is collinear with the axis of the bearing, forming a rotating pair. Swing fork 16 is supported on the cross journal of second drive shaft 17 via bearings installed in two symmetrical bearing holes at its front end. The cross journal of the second drive shaft 17 is symmetrically arranged based on the axis of the second drive shaft 17, and the bottom is provided with an integrated cross bearing; the outer ring of the cross bearing is fixed to the frame 1 by a fixed base plate, and the inner ring is connected to the bottom of the second drive shaft 17 by bolts; the top of the second drive shaft 17 is fastened to the seeding tube 20 by bolts at the opening of the top clamp of the support sleeve 19; the bottom of the support sleeve 19 is provided with an inner spline that cooperates with the outer spline of the top journal of the second drive shaft 17 to achieve circumferential fixation; the front end of the seeding tube 20 is provided with a fixedly connected fan-shaped nozzle 21, and the rear end is connected to the seeding tube 20 of the fluidized seeding dispensing mechanism through a hose 18.

[0031] It also includes a frame 1, on which the fluidized seedling discharge mechanism and the swing seeding mechanism are placed. The bottom of the circulating pump 5, the water tank 6, and the second drive shaft 17 are all in contact with the frame 1 to make the seedling discharge port 3-1 of the fluidized seedling discharge mechanism and the seedling inlet of the swing seeding mechanism at the same height.

[0032] It also includes a flow equalization chamber 4 and a turntable support. The flow equalization chamber 4 has a cavity in the middle. The upper and lower end faces of the flow equalization chamber 4 are fixedly connected to the lower end face of the wedge fluidized chamber 3 and the upper end face of the circulating pump 5, respectively. The wedge cavity of the wedge fluidized chamber 3 is connected to the outlet of the circulating pump 5 through the cavity of the flow equalization chamber 4. The turntable support is fixedly connected to the lower end of the second drive shaft 17 to support the second drive shaft 17 and ensure that the second drive shaft 17 remains stable when it moves with the swing fork 16.

[0033] A groove is provided on the upper surface of the flow equalization chamber 4, and a distribution plate is installed in the groove. A filter screen is installed at the side opening of the seedling storage tank 2. The distribution plate can support the seedling particles and prevent them from entering the circulation pump 5 and being damaged. At the same time, the porous structure of the distribution plate can evenly distribute the working water flow and promote a more stable fluidization process in the wedge-shaped fluidization chamber 3. The filter screen is adhered in the groove of the interface on the top outer wall of the seedling storage tank to prevent the seedlings from entering the circulation pump 5 through the circulation pipe 7 with the rising water flow and being damaged.

[0034] like Figure 3 As shown, the wedge-shaped fluidization chamber 3 has a narrow bottom, a wide top, and a rectangular cross-section, with the cross-sectional area increasing linearly along the height. This causes the flow velocity to gradually decrease as the cross-sectional area increases during the upward movement of the water within the wedge-shaped fluidization chamber 3, ensuring a higher flow velocity at the bottom for fluidizing the shellfish seed particles. Simultaneously, the shellfish seed particles gathered at the top after complete fluidization do not detach due to the lower flow velocity.

[0035] An ultrasonic sensor 10 is installed on the outer wall of the rectangular side 3-3 of the wedge-shaped fluidization chamber 3 near the inlet of the seedling outlet 3-1. The ultrasonic sensor 10 can monitor the attenuation degree and scattering intensity of the sound wave energy at the inlet of the seedling outlet 3-1, and convert it into a seedling concentration signal. Based on this signal, the speed of the circulating pump 5 is dynamically adjusted to regulate the flow rate in the wedge-shaped fluidization chamber 3, thereby ensuring that the seedling concentration at the seedling outlet 3-1 of the wedge-shaped fluidization chamber 3 is stable and that no blockage occurs when the seedlings are transported in batches.

[0036] The axis of the seeding tube 20 is parallel to the journal axis of the swing fork 16 and is on the same vertical reference plane. The angle between the journal axis of the swing fork 16 and the axial axis of the crank wheel 15 is half of the swing angle of the seeding tube 20.

[0037] A fluidized, oscillating method for seeding shellfish in intertidal zones includes the following steps: S1, circulation pump 5, motor 13, water tank valve 8 and seedling discharge valve 11 are all closed. Water is injected into seedling storage tank 2 until the preset water level is reached. Then, seedlings are added to seedling storage tank 2 and the seedlings sink into the distribution plate at the bottom of wedge-shaped fluidization chamber 3. S2. Turn on the circulation pump 5. The water flow through the outlet of the circulation pump 5 carries the shellfish seedlings up to the seedling discharge port 3-1 and the shellfish seedling storage tank 2 above it. The ultrasonic sensor 10 detects the concentration of shellfish seedlings at the seedling discharge port 3-1. If the detected concentration of shellfish seedlings is greater than the maximum value of the preset concentration range, the speed of the circulation pump 5 is reduced. Otherwise, the speed of the circulation pump 5 is increased until the concentration of shellfish seedlings at the seedling discharge port 3-1 is within the preset concentration range. S3. Open the seedling discharge valve 11 so that the seedlings enter the swing seeding mechanism from the seedling discharge port 3-1 with the water flow, and open the water tank valve 8 so that the water in the water tank 6 enters the inlet of the circulating pump 5. S4. Start the motor 13. The motor 13 drives the crank wheel 15, the swing fork 16 and the second transmission shaft 17 to move, which in turn drives the seedling tube 20 and the fan-shaped nozzle 21 to swing back and forth. The seedlings pass through the hose 18 and the seedling tube 20 in sequence and are then sown by the fan-shaped nozzle 21.

[0038] In step S1, the preset water level is at least higher than the height of the side opening of the seedling storage tank 2.

[0039] 【like Figure 7 As shown, more specifically, the working steps of the present invention include: Step 1: Keep the discharge valve 11 and water tank valve 8 closed. Water is injected through the inlet at the top center of the seedling storage tank 2 or through the water tank 6 via the outlet pipe 7. The water flows into the cavity of the seedling storage tank 2 and the wedge-shaped fluidization chamber 3. When the water level reaches the interface on the top outer wall of the seedling storage tank 2, seedlings are injected through the inlet at the top of the seedling storage tank 2. When the seedlings are completely filled, continue injecting water until it exceeds the overflow interface height. Close the end cover to shut off the inlet. The automatic air vent valve 9 at the top of the seedling storage tank 2 removes excess gas from the cavity. The seedling storage tank 2, wedge-shaped fluidization chamber 3, flow equalization chamber 4, and circulation pump 5 are connected by the circulation pipe 7 to form a sealed water body. During the initial feeding stage of the seedlings, the seedlings will sink to the bottom of the wedge-shaped fluidization chamber 3 due to gravity, and the distribution plate supports the seedlings.

[0040] Step 2: Start the circulating pump 5. The working water is drawn in and flows upward through the porous structure of the distribution plate. The working water flows sequentially through the internal cavities of the wedge-shaped fluidization chamber 3 and the seedling storage tank 2, and then returns to the circulating pump 5 through the circulating pipeline 7 to form a closed circulation loop; Figure 5 , Figure 6 As shown, the upward-flowing working water within the cavity exerts an upward drag force on the clam seedlings: when the apparent velocity of the fluid is greater than the partial fluidization velocity of the clam seedlings... At this time, the water flow begins to carry the sunken shellfish seedlings upwards to suspend them; because the cavity of the wedge-shaped fluidization chamber 3 adopts a wedge-shaped structure with a narrow bottom, a wide top, and a cross-sectional area that gradually increases with height, the flow velocity in the bottom region is fast, and its apparent fluid velocity is greater than the carry-out velocity of the shellfish seedling particles. The seedlings will be carried upwards, and in the central area, specifically at the seedling outlet (3-1), the apparent velocity of the flow is less than the carry-out velocity. But greater than the full fluidization rate The seedlings will be suspended at a height of 3-1 cm above the discharge port, with the flow velocity decreasing in the top region. The apparent fluid velocity is less than the minimum fluidization velocity of the seedlings. This ultimately leads to a decrease in the porosity of the shellfish seedlings along the height direction, causing the seedlings to accumulate in the shellfish seedling storage tank 2 and at the connection point with the wedge-shaped fluidization chamber 3.

[0041] Step 3: Open the water tank valve 8 to ensure that the seedling storage tank 2 and the wedge fluidized bed 3 are filled with water and maintain the fluidization state in the wedge fluidized bed 3; start the motor 13 of the swing seeding mechanism. As the crank wheel 15 rotates around the shaft end axis, it drives the swing fork 16 to rotate in a cone around the axis with the swing center point as the reference. The second transmission shaft 17 swings back and forth around its own axis, thereby driving the seeding tube 20 to swing back and forth.

[0042] Step 4: The entire fluidized seeding device moves in the opposite direction of the swing, and at the same time the seeding discharge valve 11 is opened. The shellfish seedlings and water in the wedge-shaped fluidized chamber 3 flow into the swing seeding mechanism under the action of pressure difference. Finally, under the action of swing, the shellfish seedlings are evenly spread on the mudflat surface, completing the seeding operation.

[0043] The above content is merely a technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A fluidized oscillating intertidal shellfish seeding device, characterized in that: It includes a fluidized seed discharge mechanism and a swing seeding mechanism. The fluidized seed discharge mechanism and the swing seeding mechanism are arranged adjacently and fixedly connected. The seed discharge port (3-1) of the fluidized seed discharge mechanism is connected to the seed inlet of the swing seeding mechanism. The fluidized seed discharge mechanism is used to store and fluidize the shellfish seedlings, and the swing seeding mechanism is used to receive the shellfish seedlings discharged by the fluidized seed discharge mechanism and spray and spread them. The fluidized bed discharge mechanism includes a seedling storage tank (2), a wedge-shaped fluidized chamber (3), a circulating pump (5), a water tank (6), a circulating pipeline (7), a water tank valve (8), an exhaust valve (9), an ultrasonic sensor (10), and a discharge valve (11). The seedling storage tank (2) has an exhaust port and an inlet on its upper end face. An exhaust valve (9) is installed on the exhaust port, which is used to exhaust the sealed cavity of the seedling storage tank (2) and to add water and seedlings into the seedling storage tank (2). The side and lower end face of the seedling storage tank (2) are provided with openings. The lower end face of the seedling storage tank (2) is fixedly connected to the wedge-shaped fluidized chamber (3). The wedge-shaped fluidized chamber (3) has a wedge-shaped cavity that gradually narrows from top to bottom in the middle. The lower end face of the seedling storage tank (2) The opening is connected to the upper end of the wedge-shaped cavity of the wedge fluidization chamber (3). The side of the wedge fluidization chamber (3) is provided with a seedling discharge port (3-1) as the seedling discharge port (3-1) of the fluidization seedling discharge mechanism. An ultrasonic sensor (10) for detecting the concentration of seedlings is installed at the inlet end of the seedling discharge port (3-1), and a seedling discharge valve (11) is installed at the outlet end. The seedling discharge valve (11) is connected to the swing seedling dispensing mechanism and is used to transport the fluidized seedlings to the swing seedling dispensing mechanism. The lower end of the wedge-shaped cavity of the wedge fluidization chamber (3) is connected to the outlet of the circulation pump (5). The inlet of the circulation pump (5), the outlet of the water tank (6) and the side opening of the seedling storage tank (2) are connected through the circulation pipeline (7). A water tank valve (8) is provided at the outlet of the water tank.

2. The fluidized oscillating intertidal shellfish seeding device according to claim 1, characterized in that: The swing seedling sowing mechanism includes a seedling discharge pipe (12), a motor (13), a first transmission shaft (14), a crank wheel (15), a swing fork (16), a second transmission shaft (17), a hose (18), a support sleeve (19), a seedling sowing pipe (20), and a fan-shaped nozzle (21). The seedling discharge pipe (12) is fixedly connected to the outlet end of the seedling discharge valve (11) and communicates with the seedling discharge valve (11). The hose (18) is fitted on the seedling discharge pipe (12). The hose (18), the seedling sowing pipe (20), and the fan-shaped nozzle (21) are connected and installed in sequence along the seedling conveying direction. The end of the hose (18) away from the fluidized seedling discharge mechanism is connected to the seedling sowing pipe (20). The support sleeve (19) is fitted on the seedling sowing pipe (20). The seedlings discharged by the fluidized seedling discharge mechanism pass through the seedling discharge pipe (12), the hose (18), and the seedling sowing pipe (20) in sequence, and are then sown by the fan-shaped nozzle (21). The output shaft of the motor (13) is connected to one end of the first transmission shaft (14) via a coupling. The other end of the first transmission shaft (14) is fixed in the central shaft hole of the crank wheel (15). The surface of the crank wheel (15) is provided with an eccentric hole. One end of the swing fork (16) is fixedly embedded in the eccentric hole. The other end of the swing fork (16) is fitted in the middle of the second transmission shaft (17). The upper end of the second transmission shaft (17) is fixed to the lower surface of the support sleeve (19). It is used to drive the seedling tube (20) to perform horizontal reciprocating motion through the rotation of the crank wheel (15).

3. The fluidized oscillating intertidal shellfish seeding device according to claim 1, characterized in that: It also includes a frame (1), on which the fluidized seedling discharge mechanism and the swing seeding mechanism are placed. The bottom of the circulating pump (5), the water tank (6) and the second drive shaft (17) are all in contact with the frame (1) to make the seedling discharge port (3-1) of the fluidized seedling discharge mechanism and the seedling inlet of the swing seeding mechanism at the same height.

4. The fluidized oscillating intertidal shellfish seeding device according to claim 2, characterized in that: It also includes a flow equalization chamber (4) and a turntable support. The flow equalization chamber (4) has a cavity in the middle. The upper and lower end faces of the flow equalization chamber (4) are fixedly connected to the lower end face of the wedge fluidization chamber (3) and the upper end face of the circulating pump (5), respectively. The wedge cavity of the wedge fluidization chamber (3) is connected to the outlet of the circulating pump (5) through the cavity of the flow equalization chamber (4). The turntable support is fixedly connected to the lower end of the second drive shaft (17) to support the second drive shaft (17) and ensure that the second drive shaft (17) remains stable when it moves with the swing fork (16).

5. A fluidized oscillating intertidal shellfish seeding device according to claim 4, characterized in that: The upper surface of the flow equalization chamber (4) is provided with a groove, and a distribution plate is installed in the groove. A filter screen is installed at the side opening of the seedling storage tank (2).

6. The fluidized oscillating intertidal shellfish seeding device according to claim 1, characterized in that: The wedge-shaped fluidization chamber (3) has a wedge-shaped structure with a narrow bottom, a wide top, and a rectangular cross-section. The cross-sectional area increases linearly along the height direction.

7. A fluidized oscillating intertidal shellfish seeding device according to claim 2, characterized in that: The axis of the seedling tube (20) is parallel to the journal axis of the swing fork (16) and is on the same vertical reference plane. The angle between the journal axis of the swing fork (16) and the axial axis of the crank wheel (15) is half of the swing angle of the seedling tube (20).

8. A method for seeding tidal flat shellfish using the fluidized oscillating tidal flat shellfish seeding device according to any one of claims 1-7, characterized in that, Includes the following steps: S1. The circulating pump (5), motor (13), water tank valve (8) and seedling discharge valve (11) are all closed. Water is injected into the seedling storage tank (2) until the preset water level is reached. Then the seedlings are added to the seedling storage tank (2). S2. Turn on the circulation pump (5). The water flow from the outlet of the circulation pump (5) carries the shellfish seedlings up to the discharge port (3-1). The ultrasonic sensor (10) detects the concentration of shellfish seedlings at the discharge port (3-1). If the detected concentration of shellfish seedlings is greater than the maximum value of the preset concentration range, the speed of the circulation pump (5) is reduced. Otherwise, the speed of the circulation pump (5) is increased until the concentration of shellfish seedlings at the discharge port (3-1) is within the preset concentration range. S3. Open the seedling discharge valve (11) so that the seedlings enter the swing seedling mechanism through the seedling discharge port (3-1) with the water flow, and open the water tank valve (8) so that the water in the water tank (6) enters the inlet of the circulating pump (5); S4. Turn on the motor (13). The motor (13) drives the crank wheel (15), the swing fork (16) and the second transmission shaft (17) to move, which in turn drives the seeding tube (20) and the fan-shaped nozzle (21) to swing back and forth. The seedlings pass through the hose (18) and the seeding tube (20) in sequence, and are then sown by the fan-shaped nozzle (21).

9. The method for sowing shellfish seedlings in tidal flats according to claim 8, characterized in that: In step S1, the preset water level is at least higher than the height of the side opening of the seedling storage tank (2).

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