A fish fry feeding device

Abstract

This utility model discloses a fish fry feeding device, specifically relating to the technical field of fish fry rearing equipment. It includes a feed hopper, a feeding device, and a speed regulating device. The feeding device comprises an inner tube, an outer tube, and a spiral shaft. One end of the inner tube is connected to and communicates with the discharge port of the feed hopper, while the other end of the inner tube is closed. The outer tube is sleeved outside the inner tube and can rotate relative to the inner tube. A first discharge port is formed on the side wall of the inner tube, and a second discharge port is formed on the side wall of the outer tube. The first discharge port can overlap with the second discharge port. The rotation of the outer tube relative to the inner tube allows adjustment of the degree of overlap between the first and second discharge ports. A spiral shaft is installed inside the inner tube and is fixedly connected to the output end of the speed regulating device, which is used to adjust the rotational speed of the spiral shaft. This utility model can adjust the feeding amount during continuous feeding, improving the uniformity of rearing sizes and increasing the survival rate of fish fry.

Description

Technical Field

[0001] This utility model relates to the field of fish fry cultivation equipment technology, and in particular to a fish fry feeding device. Background Technology

[0002] Tilapia is an important aquaculture fish in my country, with an annual production of approximately 1.7 million tons and an annual demand for 5 billion fry. Fry cultivation is a crucial step in this process. There are two major technical challenges in tilapia fry farming: firstly, their unique feeding behavior makes feeding extremely difficult, and traditional feeding methods struggle to achieve even feed distribution; secondly, as a batch-spawning fish, the fry yield per batch is significantly lower than that of the four major freshwater fish species (Chinese carp, crucian carp, and freshwater bass), making it impossible to collect a sufficient number of fry from the same batch within a single day. This characteristic makes them unsuitable for direct nursery operations in large ponds.

[0003] Currently, tilapia fry cultivation mainly employs two models: small pond cages and factory farming. Factory farming, with its advantages of controllable environmental parameters and convenient management, has become the mainstream choice in the industry. However, in actual production, fry rearing still faces multiple challenges: frequent breeding batches increase management complexity, and feeding is tedious and intensive; more importantly, tilapia fry have significantly different feeding patterns compared to other fish, exhibiting an indistinct feeding rhythm and requiring a "small, continuous feeding" strategy. This unique requirement often leads to inconsistent fry sizes and low survival rates, becoming a technical bottleneck restricting the efficient development of the industry. Utility Model Content

[0004] The purpose of this invention is to provide a fish fry feeding device to solve the problems existing in the prior art. It can adjust the feeding amount during continuous feeding, improve the uniformity of the breeding size, and increase the survival rate of fish fry.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] This utility model provides a fish fry feeding device, including a feed hopper, a feeding device, and a speed regulating device. The feeding device includes an inner tube, an outer tube, and a spiral shaft. One end of the inner tube is connected and communicates with the discharge port of the feed hopper, and the other end of the inner tube is closed. The outer tube is sleeved outside the inner tube and can rotate relative to the inner tube. A first discharge port is opened on the side wall of the inner tube, and a second discharge port is opened on the side wall of the outer tube. The first discharge port can coincide with the second discharge port. The rotation of the outer tube relative to the inner tube can adjust the degree of coincidence between the first discharge port and the second discharge port. The spiral shaft is arranged inside the inner tube and is fixedly connected to the output end of the speed regulating device. The speed regulating device is used to adjust the rotation speed of the spiral shaft.

[0007] Preferably, the speed regulating device includes a drive device, a drive gear, a synchronous toothed belt, a variable diameter transmission assembly, and a tensioning device. The output shaft of the drive device is fixedly connected to the drive gear, and the synchronous toothed belt meshes with the drive gear. The variable diameter transmission assembly includes a wheel, a central disc, multiple meshing rods, and a locking element. The wheel is fixedly connected to the helical shaft. The wheel and the central disc are coaxially arranged, and the central disc can rotate relative to the wheel. The wheel includes a base plate and an annular wall fixedly connected to the base plate. The annular wall has multiple limiting holes evenly distributed around its circumference. The meshing rods... The fixed end of the engagement rod is rotatably connected to the outer circumference of the central disk. The rotation axis of the engagement rod is parallel to the axis of the central disk. The free end of the engagement rod passes through the limiting hole and engages with the synchronous toothed belt. The size of the limiting hole is larger than the size of the engagement rod. By rotating the central disk, the angle between the engagement rod and the radial line of the central disk passing through the fixed end of the engagement rod can be adjusted, thereby adjusting the straight-line distance from the free end of the engagement rod to the axis of the central disk. The locking member is used to restrict the rotation of the central disk relative to the wheel disk, and the tensioning device is used to maintain the preload of the synchronous toothed belt.

[0008] Preferably, the locking element includes a fixed base and a locking rod rotatably connected to the fixed base. The fixed base is fixedly installed at the center of the central disk. The rotation axis of the locking rod is perpendicular to the axis of the central disk. The top of the annular wall is provided with a plurality of locking grooves. The locking rod can be inserted into the locking grooves, thereby fixing the central disk relative to the wheel.

[0009] Preferably, each of the locking slots is marked with a value indicating the rotational speed of the helical shaft when the locking rod is set in the locking slot.

[0010] Preferably, the center line of the locking groove is at a certain angle to the axis of the wheel.

[0011] Preferably, the meshing rod includes a rod body and a crescent block. The rod body is fixedly connected to the inner side of the crescent block, and the outer side of the crescent block is an arc-shaped surface. Teeth that mesh with the synchronous toothed belt are evenly arranged on the arc-shaped surface.

[0012] Preferably, the speed regulating device further includes a fixed plate, the driving device and the tensioning device are fixedly mounted on the fixed plate, the spiral shaft is rotatably connected to the fixed plate, and the fixed plate is fixedly connected to the feed hopper.

[0013] Preferably, the tensioning device includes a tensioning gear, a tensioning rod, a tensioning seat, and a tensioning spring. The tensioning seat is fixedly mounted on the fixed plate. One end of the tensioning rod is rotatably connected to the tensioning seat, and the rotation axis of the tensioning rod is perpendicular to the fixed plate. The tensioning gear is rotatably connected to the other end of the tensioning rod, and the rotation axis of the tensioning gear is perpendicular to the fixed plate. The tensioning gear can mesh with the synchronous toothed belt. One end of the tensioning spring is connected to the fixed plate, and the other end of the tensioning spring is connected to the tensioning rod.

[0014] Preferably, the helical shaft includes a central shaft and helical blades, the helical blades being helically wound around the central shaft.

[0015] Preferably, the outer tube includes an adjustment handle, which is fixedly connected to the outer side wall of the outer tube.

[0016] The present invention achieves the following technical advantages over the prior art:

[0017] This utility model provides a fish fry feeding device. By rotating the outer tube relative to the inner tube, the overlap between the two can be adjusted, thereby changing the size of the feed outlet and adjusting the feeding amount. At the same time, adjusting the speed of the spiral shaft can control the feed pushing speed and prevent feed from accumulating at the outlet. This not only meets the special feeding rhythm requirements of fish fry at different growth stages, but also reduces the intensity of manual management, further improves the uniformity of breeding size and survival rate, reduces breeding costs, and achieves the goal of efficient and high-quality development of factory farming. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a fish fry feeding device;

[0020] Figure 2 This is a schematic diagram of the feeding device.

[0021] Figure 3 This is a schematic diagram of the speed control device;

[0022] Figure 4 This is a schematic diagram of the variable diameter transmission assembly;

[0023] Figure 5 This is an enlarged view of the end of the meshing rod;

[0024] Figure 6 This is a schematic diagram of the helical shaft.

[0025] In the diagram: 1-Feed hopper; 2-Feeding device; 3-Speed ​​control device; 4-Inner tube; 5-Outer tube; 6-Screw shaft; 7-Central shaft; 8-Screw blade; 9-Second discharge port; 10-Adjusting handle; 11-Drive device; 12-Drive gear; 13-Synchronous toothed belt; 14-Variable diameter transmission assembly; 15-Pulley; 16-Central disc; 17-Meshing rod; 18-Fixed seat; 19-Locking rod; 20-Limiting hole; 21-Locking groove; 22-Rod body; 23-Crescent block; 24-Tooth; 25-Tension gear; 26-Tension rod; 27-Tension seat; 28-Tension spring; 29-Fixed plate. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] The purpose of this invention is to provide a fish fry feeding device to solve the problems existing in the prior art. It can adjust the feeding amount during continuous feeding, improve the uniformity of the breeding size, and increase the survival rate of fish fry.

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] This utility model provides a fish fry feeding device, such as Figures 1-2As shown, the device includes a feed hopper 1, a feeding device 2, and a speed regulating device 3. The feeding device 2 includes an inner tube 4, an outer tube 5, and a screw shaft 6. One end of the inner tube 4 is connected to and communicates with the discharge port of the feed hopper 1, and the other end of the inner tube 4 is closed. The outer tube 5 is sleeved on the inner tube 4 and can rotate relative to the inner tube 4. A first discharge port is opened on the side wall of the inner tube 4, and a second discharge port 9 is opened on the side wall of the outer tube 5. The first discharge port can coincide with the second discharge port 9. The rotation of the outer tube 5 relative to the inner tube 4 can adjust the degree of coincidence between the first discharge port and the second discharge port 9. A screw shaft 6 is installed inside the inner tube 4. The screw shaft 6 is fixedly connected to the output end of the speed regulating device 3. The speed regulating device 3 is used to adjust the rotation speed of the screw shaft 6. The overlap between the outer tube 5 and the inner tube 4 can be adjusted by rotating the outer tube 5 relative to the inner tube 4. When the overlap increases, the outlet area expands, and the feeding amount increases. When the overlap decreases, the feeding amount decreases, thereby regulating the feeding amount. This avoids feed waste or water pollution caused by overfeeding and also prevents underfeeding from affecting the growth of fish fry. At the same time, adjusting the speed of the spiral shaft 6 can control the feed pushing speed. The higher the speed, the greater the amount of feed pushed out per unit time, and vice versa, avoiding feed accumulation at the outlet. Through the speed adjustment of the spiral shaft 6 and the adjustment of the dual-tube outlet, the feed amount can be highly matched with the actual feeding needs of the fish fry. This not only meets the special feeding rhythm needs of fish fry at different growth stages, but also avoids the problem of overfeeding or underfeeding caused by experience differences in traditional manual feeding. This reduces the intensity of manual management, further improves the uniformity of breeding size and survival rate, and reduces breeding costs. It is especially suitable for modern aquaculture farms with high requirements for feeding accuracy and high stocking density.

[0030] A further preferred embodiment of this utility model is, as follows: Figures 3-4As shown, the speed regulating device 3 includes a drive device 11, a drive gear 12, a synchronous toothed belt 13, a variable diameter transmission assembly 14, and a tensioning device. The output shaft of the drive device 11 is fixedly connected to the drive gear 12, and the synchronous toothed belt 13 meshes with the drive gear 12. The variable diameter transmission assembly 14 includes a wheel 15, a central disc 16, multiple meshing rods 17, and a locking element. The wheel 15 is fixedly connected to the helical shaft 6. The wheel 15 and the central disc 16 are coaxially arranged, and the central disc 16 can rotate relative to the wheel 15. The wheel 15 includes a base plate and an annular wall fixedly connected to the base plate. Multiple limiting holes 20 are evenly opened around the annular wall. The fixed end of the meshing rod 17 is rotatably connected to the outer circumference of the central disk 16. The rotation axis of the meshing rod 17 is parallel to the axis of the central disk 16. The free end of the meshing rod 17 passes through the limiting hole 20 and meshes with the synchronous toothed belt 13. The size of the limiting hole 20 is larger than the size of the meshing rod 17. By rotating the central disk 16, the angle between the meshing rod 17 and the radial line of the central disk 16 passing through the fixed end of the meshing rod 17 can be adjusted, thereby adjusting the straight-line distance from the free end of the meshing rod 17 to the axis of the central disk 16. The locking element is used to limit the rotation of the central disk 16 relative to the wheel disk 15, and the tensioning device is used to maintain the preload of the synchronous toothed belt 13. The multiple independent meshing rods 17 of the variable diameter transmission assembly 14 are evenly distributed around the central axis 7 of the wheel disk 15 in a circular pattern, similar to a "spoke" layout. The outer end of each meshing rod 17 can mesh with the synchronous toothed belt 13. Multiple meshing rods 17 form an effect similar to a "segmented gear". When the synchronous toothed belt 13 moves, the teeth of the rack belt mesh with the circumferentially distributed meshing rods 17 in sequence, pushing the meshing rods 17 to rotate around the central axis 7, thereby driving the wheel 15 and the helical shaft 6 connected to the wheel 15 to rotate. When it is necessary to adjust the different output speeds of the wheel 15, the central disk 16 is rotated to a certain angle. The meshing rods 17 also rotate under the restriction of the limiting hole 20, thereby changing the angle between the meshing rods 17 and the radial line of the central disk 16 passing through the fixed end of the meshing rods 17, and thus changing the straight-line distance from the free end of the meshing rods 17 to the axis of the central disk 16. When the meshing rod 17 is located on a radial line of the central disk 16, the diameter of the segmented gear formed by the multiple meshing rods 17 is the largest, the output speed of the variable diameter transmission assembly 14 is also the largest, and the rotational speed of the helical shaft 6 is also higher. As the angle between the meshing rod 17 and the radial line of the central disk 16 passing through the fixed end of the meshing rod 17 becomes larger and larger, the diameter of the segmented gear formed by the multiple meshing rods 17 also decreases, the output speed of the variable diameter transmission assembly 14 also decreases, and the rotational speed of the helical shaft 6 also decreases.

[0031] In a further preferred embodiment of this utility model, the locking component includes a fixed base 18 and a locking rod 19 rotatably connected to the fixed base 18. The fixed base 18 is fixedly installed at the center of the central disk 16. The rotation axis of the locking rod 19 is perpendicular to the axis of the central disk 16. Multiple locking slots 21 are circumferentially formed on the top of the annular wall. The locking rod 19 can be inserted into the locking slots 21, thereby fixing the central disk 16 relative to the wheel 15. The centerline of the locking slot 21 forms a certain angle with the axis of the wheel 15. Locking the central disk 16 and the wheel 15 by inserting the locking rod 19 into the locking slots 21 is simple to operate. Speed ​​adjustment can be completed simply by inserting the locking rod 19 into the corresponding locking slot 21, which can be achieved by a single person within seconds, significantly shortening the equipment adjustment time. Furthermore, different locking slots 21 can be quickly switched, improving the flexibility of equipment use. The inclined locking slots 21 provide better locking effect, preventing the locking rod 19 from dislodging from the locking slot 21 during the rotation of the wheel 15.

[0032] In a further preferred embodiment of this utility model, each locking groove 21 is marked with a value indicating the rotational speed of the spiral shaft 6 when the locking rod 19 is set in the locking groove 21. This allows the operator to intuitively adjust the rotational speed, reduce the error rate, and significantly improve the operating efficiency and feeding accuracy of the fish fry feeding device.

[0033] A further preferred embodiment of this utility model is, as follows: Figure 5 As shown, the meshing rod 17 includes a rod body 22 and a crescent block 23. The rod body 22 is fixedly connected to the inner side of the crescent block 23. The outer side of the crescent block 23 is an arc-shaped surface, and teeth 24 that mesh with the synchronous toothed belt 13 are evenly arranged on the arc-shaped surface.

[0034] In a further preferred embodiment of this utility model, the speed regulating device 3 also includes a fixed plate 29, the driving device 11 and the tensioning device are fixedly installed on the fixed plate 29, the spiral shaft 6 is rotatably connected to the fixed plate 29, and the fixed plate 29 is fixedly connected to the feed hopper 1.

[0035] In a further preferred embodiment of this utility model, the tensioning device includes a tensioning gear 25, a tensioning rod 26, a tensioning seat 27, and a tensioning spring 28. The tensioning seat 27 is fixedly mounted on a fixed plate 29. One end of the tensioning rod 26 is rotatably connected to the tensioning seat 27, and the rotation axis of the tensioning rod 26 is perpendicular to the fixed plate 29. The tensioning gear 25 is rotatably connected to the other end of the tensioning rod 26, and the rotation axis of the tensioning gear 25 is perpendicular to the fixed plate 29. The tensioning gear 25 can mesh with the synchronous toothed belt 13. One end of the tensioning spring 28 is connected to the fixed plate 29, and the other end of the tensioning spring 28 is connected to the tensioning rod 26. When the diameter of the segmented gear formed by the multiple meshing rods 17 decreases, the synchronous toothed belt 13 will become loose, and the synchronous toothed belt 13 will experience slippage and tooth skipping. The tensioning device continuously applies tension to the tensioning gear 25 through the preload of the tensioning spring 28, offsetting the slack of the toothed belt and ensuring that the belt teeth are always tightly engaged with the drive gear 12 and the meshing rod 17, thus guaranteeing the stability, accuracy and reliability of power transmission.

[0036] A further preferred embodiment of this utility model is, as follows: Figure 6 As shown, the spiral shaft 6 includes a central shaft 7 and a spiral blade 8, with the spiral blade 8 spirally wound on the central shaft 7.

[0037] In a further preferred embodiment of this utility model, the outer tube 5 includes an adjusting handle 10, which is fixedly connected to the outer side wall of the outer tube 5. The adjusting handle 10 facilitates the relative rotation of the outer tube 5 and the inner tube 4.

[0038] When using the fish fry feeding device, the hourly feeding rate is set according to the daily feed amount for each fish fry cage. The gearbox is adjusted to the required feeding speed, and the size of the feeding hole is adjusted so that feed is also discharged from the last outlet hole. For example, the motor achieves precise feeding control through a timer switch, automatically stopping for 2 hours after every 2 hours of operation, and repeating this cycle to form a regular intermittent working mode to complete the feeding operation. The feeding time is adjusted every 3 days, increasing by 5 minutes each time. After 30 days of feeding, the fish fry reach a length of about 3 cm, are of uniform size, are strong, and have a survival rate increased by more than 10%, making them suitable for adult fish farming or further large-scale breeding.

[0039] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A fish fry feeding device, characterized in that: The device includes a feed hopper, a feeding device, and a speed regulating device. The feeding device includes an inner tube, an outer tube, and a screw shaft. One end of the inner tube is connected to and communicates with the discharge port of the feed hopper, and the other end of the inner tube is closed. The outer tube is sleeved outside the inner tube and can rotate relative to the inner tube. A first discharge port is opened on the side wall of the inner tube, and a second discharge port is opened on the side wall of the outer tube. The first discharge port can coincide with the second discharge port. The rotation of the outer tube relative to the inner tube can adjust the degree of coincidence between the first discharge port and the second discharge port. The screw shaft is installed inside the inner tube and is fixedly connected to the output end of the speed regulating device. The speed regulating device is used to adjust the rotation speed of the screw shaft.

2. The fish fry feeding device according to claim 1, characterized in that: The speed regulating device includes a drive unit, a drive gear, a synchronous toothed belt, a variable diameter transmission assembly, and a tensioning device. The output shaft of the drive unit is fixedly connected to the drive gear, and the synchronous toothed belt meshes with the drive gear. The variable diameter transmission assembly includes a wheel, a central disc, multiple meshing rods, and a locking element. The wheel is fixedly connected to the helical shaft, and the wheel and the central disc are coaxially arranged, with the central disc capable of rotating relative to the wheel. The wheel includes a base plate and an annular wall fixedly connected to the base plate. The annular wall has multiple circumferentially evenly spaced limiting holes. The meshing rods are fixedly... The fixed end is rotatably connected to the outer circumference of the central disk. The rotation axis of the meshing rod is parallel to the axis of the central disk. The free end of the meshing rod passes through the limiting hole and meshes with the synchronous toothed belt. The size of the limiting hole is larger than the size of the meshing rod. By rotating the central disk, the angle between the meshing rod and the radial line of the central disk passing through the fixed end of the meshing rod can be adjusted, thereby adjusting the straight-line distance from the free end of the meshing rod to the axis of the central disk. The locking member is used to restrict the rotation of the central disk relative to the wheel disk, and the tensioning device is used to maintain the preload of the synchronous toothed belt.

3. The fish fry feeding device according to claim 2, characterized in that: The locking component includes a fixed base and a locking rod rotatably connected to the fixed base. The fixed base is fixedly installed at the center of the central disk. The rotation axis of the locking rod is perpendicular to the axis of the central disk. The top of the annular wall is provided with a plurality of locking grooves. The locking rod can be inserted into the locking grooves, thereby fixing the central disk relative to the wheel.

4. The fish fry feeding device according to claim 3, characterized in that: Each of the locking slots is marked with a value indicating the rotational speed of the helical shaft when the locking rod is set in the locking slot.

5. The fish fry feeding device according to claim 3, characterized in that: The centerline of the locking groove is at a certain angle to the axis of the wheel.

6. The fish fry feeding device according to claim 2, characterized in that: The meshing rod includes a rod body and a crescent block. The rod body is fixedly connected to the inner side of the crescent block. The outer side of the crescent block is an arc-shaped surface, and teeth that mesh with the synchronous toothed belt are evenly arranged on the arc-shaped surface.

7. The fish fry feeding device according to claim 2, characterized in that: The speed regulating device also includes a fixed plate, the driving device and the tensioning device are fixedly mounted on the fixed plate, the spiral shaft is rotatably connected to the fixed plate, and the fixed plate is fixedly connected to the feed hopper.

8. The fish fry feeding device according to claim 7, characterized in that: The tensioning device includes a tensioning gear, a tensioning rod, a tensioning seat, and a tensioning spring. The tensioning seat is fixedly mounted on the fixed plate. One end of the tensioning rod is rotatably connected to the tensioning seat, and the rotation axis of the tensioning rod is perpendicular to the fixed plate. The tensioning gear is rotatably connected to the other end of the tensioning rod, and the rotation axis of the tensioning gear is perpendicular to the fixed plate. The tensioning gear can mesh with the synchronous toothed belt. One end of the tensioning spring is connected to the fixed plate, and the other end of the tensioning spring is connected to the tensioning rod.

9. The fish fry feeding device according to claim 1, characterized in that: The helical shaft includes a central shaft and helical blades, with the helical blades helically wound around the central shaft.

10. The fish fry feeding device according to claim 1, characterized in that: The outer tube includes an adjustment handle, which is fixedly connected to the outer side wall of the outer tube.

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