A device for removing the dorsal fin and the pelvic fin of a feed fish with a hard bone and a mandarin fish breeding method

Abstract

The application discloses a feed fish with hard bone dorsal fin and ventral fin removing device, which comprises a top plate arranged on the upper side and a bottom plate arranged on the lower side, and the top plate and the bottom plate are connected through a support plate to form a frame structure; an inclined conveying channel is arranged between the top plate and the bottom plate, and the conveying channel is gradually inclined from a fish body inlet end to a fish body outlet end; a fish tail clamping mechanism, a dorsal fin removing mechanism and a fish head clamping mechanism are sequentially arranged above the conveying channel along the fish body conveying direction, a hollow ventral fin bottom hole is arranged at the bottom of the conveying channel and is opposite to the ventral fin of the fish body, and a ventral fin removing mechanism is further arranged on the bottom surface of the conveying channel. The application further discloses a mandarin fish breeding method using the feed fish with hard bone dorsal fin and ventral fin removing device. Compared with the prior art, the technical scheme of the application can efficiently remove the dorsal fin and the ventral fin of the fish, guarantee normal feeding of the mandarin fish and reduce the mandarin fish breeding cost.

Description

Technical Field

[0001] This invention relates to the field of aquaculture technology, and in particular to a device for removing bony dorsal and pelvic fins from feed fish and a method for raising mandarin fish. Background Technology

[0002] Mandarin fish is a highly nutritious aquatic fish species that has gained market popularity in recent years and has been widely farmed by fish farmers. We know that when mandarin fish feed in natural waters, they prefer to chase and forage for live small fish or shrimp, but are uninterested in food that is still or dead. Therefore, in large-scale farming, farmers usually stock the mandarin fish ponds with live, small grass carp, mud carp, or other small fish as feed. However, this feeding method increases the cost of mandarin fish farming, and the small grass carp or mud carp, after a certain period of cultivation, can also be sold as commercial fish with some value.

[0003] We also know that tilapia have strong vitality and reproductive capacity, are widely distributed in southern waters, and are relatively easy to catch. In view of this, some fish farmers have tried to directly release live tilapia caught in natural waters into the mandarin fish farming waters to serve as feed for the mandarin fish.

[0004] However, when live tilapia with their dorsal and pelvic fins intact are directly fed to mandarin fish as food, it can be observed that after a certain period of feeding, when the live tilapia are startled or when the mandarin fish swallow them whole, the dorsal and pelvic fins of the tilapia suddenly spread outwards, revealing hard bony spines inside these fins. When the mandarin fish eats the live tilapia, the simultaneous opening of the dorsal and pelvic fins can cause them to become lodged in the mandarin fish's mouth or esophagus. This prevents the mandarin fish from swallowing the tilapia further or from spitting it out, making it impossible for the mandarin fish to eat normally. In some cases, the hard bony spines inside the tilapia's dorsal and pelvic fins can even pierce the mandarin fish's head, causing large mandarin fish to die instantly.

[0005] Therefore, in order to reduce the farming cost of mandarin fish, appropriate devices are used to remove the hard bony spines inside the dorsal and pelvic fins of tilapia, ensuring that the mandarin fish can feed normally while maintaining freshness with the bony spines extending outwards. Summary of the Invention

[0006] The main objective of this invention is to provide a device for removing the bony dorsal and pelvic fins of feed fish and a method for raising mandarin fish. The aim is to facilitate the removal of the dorsal and pelvic fins of tilapia used as feed fish for raising mandarin fish, thereby ensuring that the mandarin fish can feed normally and reducing the cost of raising mandarin fish.

[0007] To achieve the above objectives, the present invention proposes a feed fish device for removing bony dorsal and pelvic fins, comprising a top plate disposed above and a bottom plate disposed below, the top plate and the bottom plate being connected by a support plate to form a frame structure; an inclined conveying channel is provided between the top plate and the bottom plate, the conveying channel gradually sloping from the fish inlet end to the fish outlet end; above the conveying channel, along the fish conveying direction, a fish tail clamping mechanism, a dorsal fin removal mechanism, and a fish head clamping mechanism are sequentially provided; the bottom of the conveying channel has a hollowed-out pelvic fin bottom hole opposite to the pelvic fin of the fish; the bottom surface of the conveying channel is also provided with a pelvic fin removal mechanism.

[0008] Preferably, the fish tail clamping mechanism includes a fish tail telescopic pump fixedly connected to the top plate. The telescopic end of the fish tail telescopic pump extends downward and is fixedly connected to the fish tail mounting block. The fish tail mounting block has a fan-shaped cavity inside, which is pivotally connected to the fan-shaped block. The bottom surface of the fan-shaped block is curved, and the left and right sides of the fan-shaped block are respectively fixed to the outwardly unfolding fish tail fixing blocks. The fish tail fixing blocks form an open receiving opening that is narrow at the top and wide at the bottom.

[0009] Preferably, the included angle between the front and rear sides of the sector block is smaller than the included angle between the inner walls of the front and rear sides of the sector block corresponding to the sector cavity.

[0010] Preferably, the dorsal fin removal mechanism includes a dorsal fin telescopic pump fixed to the top plate. The telescopic end of the dorsal fin telescopic pump extends downward and is fixedly connected to the fin fixing block. The fin fixing block has an open cavity inside and is fixedly connected to the housing of the dorsal fin removal telescopic pump. The telescopic end of the dorsal fin removal telescopic pump is arranged in a left-right direction and is connected to the movable block. The fin fixing block has a fixed block that is horizontally opposite to the movable block and can fit together. The opposing surfaces of the fixed block and / or the movable block are provided with protruding toothed blades for removing the dorsal fin.

[0011] Preferably, the trajectory of the protruding toothed blade coincides with the trajectory of the dorsal fin contacting the fish body.

[0012] Preferably, the fish head clamping mechanism includes a fish head telescopic pump fixedly connected to the top plate. The telescopic end of the fish head telescopic pump extends downward and is fixedly connected to the fish head fixing block. The bottom edge of the fish head fixing block is inclined downward and has several clamping block groups symmetrically pivotally connected on the left and right sides. Each clamping block group includes a left clamping block and a right clamping block. The space between the bottom swing arm of the left clamping block and the bottom swing arm of the right clamping block is narrower at the top and wider at the bottom. The middle of the fish head fixing block is provided with several through holes opposite to each clamping block group. A spring is provided inside the through hole. One end of the spring is fixedly connected to the top swing arm of the left clamping block, and the other end of the spring is fixedly connected to the top swing arm of the right clamping block.

[0013] Preferably, the bottom surface of the fish head fixing block is provided with a curved groove, and the depth of the curved groove gradually decreases along the fish body conveying direction.

[0014] Preferably, the pelvic fin removal mechanism includes a pelvic fin telescopic pump fixedly connected to the conveying channel. The telescopic end of the pelvic fin telescopic pump extends and retracts towards the fish head. The telescopic end of the pelvic fin telescopic pump is fixedly connected to the pelvic fin removal push plate. The top edge of the pelvic fin removal push plate is provided with a pelvic fin removal protruding knife. The gap between the cutting edge of the pelvic fin removal protruding knife and the outer surface of the conveying channel is 1-2 mm.

[0015] Preferably, the left and right sides of the conveying channel are respectively provided with track protrusions along the length of the conveying channel, and the ventral fin removal push plate is provided with a side groove and slides in cooperation with the track protrusions.

[0016] This invention also proposes a method for farming mandarin fish using the aforementioned feed fish bony dorsal and pelvic fin removal device, comprising the following steps:

[0017] Step S1: Capture the live fish to be used as target feed fish, and sieve and group all the target feed fish through sieves of different inner diameter sizes;

[0018] Step S2: Fix the head and tail of the target feed fish respectively, remove the dorsal and pelvic fins of the fish, and collect the processed target feed fish.

[0019] Step S3: After a certain number of target feed fish have been collected, potassium permanganate solution is injected into the collection box to clean and disinfect the live target feed fish. After standing, the target feed fish are transported through the transport channel to the mandarin fish farming water body that is in line with the corresponding feeding size, so that the target feed fish swim in the mandarin fish farming water body and are chased and foraged by the farmed mandarin fish.

[0020] Step S4: After the target feed fish have been left to stand and disinfected, they are transferred to a pre-cooked starch solution mixed with medication. The target feed fish swim in the starch solution and the starch solution adheres to their surface. The target feed fish with the starch solution attached are then transferred to the mandarin fish farming water to swim, where they are chased and foraged by the farmed mandarin fish.

[0021] Preferably, step S2 includes the following steps:

[0022] Step S21: The target feed fish is fed into the conveying channel from the fish body inlet end. The fish head clamping mechanism pushes the fish head fixing block downward in advance, and the fish head is initially limited. The fish tail clamping mechanism expands the fish tail fixing blocks on the left and right sides, gradually pushing the fish tail towards the middle. The fan-shaped block swings relative to the inside of the fan-shaped cavity as the fish tail mounting block continues to move downward, pressing the fish tail surface at a suitable angle.

[0023] Step S22: The fish head telescopic pump continues to push the fish head fixing block downwards. Different clamping block groups elastically clamp and limit the surface of the fish head. After the fish head and tail are compressed, the dorsal fin of the fish body is pushed upwards and the pelvic fin of the fish body is pushed downwards through the bottom hole of the pelvic fin.

[0024] Step S23: When it is necessary to remove the dorsal and pelvic fins of the fish, the dorsal fin telescopic pump pushes the fin fixing block downwards to the position where the dorsal fin meets the back of the fish. Then, the dorsal fin shearing telescopic pump pulls the movable block towards the fin fixing block. The protruding teeth on the opposite surfaces of the movable block and the fixing block bite each other to remove the dorsal fin. The pelvic fin telescopic pump pushes the pelvic fin removal push plate towards the pelvic fin. The pelvic fin removal protruding knife removes the pelvic fin and its internal hard bones. The fish head clamping mechanism, dorsal fin removal mechanism, and fish tail clamping mechanism reset upwards, and the pelvic fin removal mechanism resets backwards.

[0025] The technical solution of this invention has the following advantages over the prior art:

[0026] The technical solution of this invention achieves automatic positioning and continuous operation of tilapia in the conveying channel through the coordinated cooperation of the fish head clamping mechanism and the fish tail clamping mechanism. The dorsal fin removal mechanism uses toothed blades inside to cut and remove the dorsal fin, and the pelvic fin removal mechanism directly pushes and cuts the outwardly opening pelvic fins downwards, efficiently removing the dorsal and pelvic fins and their internal hard bones, thus improving processing efficiency.

[0027] Furthermore, the mandarin fish farming method disclosed in this invention allows for the convenient removal of the dorsal and pelvic fins from easily obtainable tilapia, followed by disinfection and settling. The treated live tilapia can then be introduced into the mandarin fish farming water as feed for the mandarin fish to chase and forage, greatly reducing the cost of raising the fish. It also avoids the risk of mandarin fish dying directly due to tilapia with incomplete removal of dorsal and pelvic fins getting stuck in the mouth or esophagus, which is common in existing technologies. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 This is a three-dimensional structural schematic diagram of the feed fish bone removal device for dorsal and pelvic fins according to the present invention.

[0030] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0031] Figure 3 for Figure 1 A magnified view of a section at point B in the middle;

[0032] Figure 4This is a side view of a tilapia.

[0033] Figure 5 This is a partial structural cross-sectional view of the fishtail clamping mechanism of the present invention;

[0034] Figure 6 This is a partial structural cross-sectional view of the fish head clamping mechanism of the present invention;

[0035] Figure 7 This is a three-dimensional view of a portion of the ventral fin removal mechanism of the present invention.

[0036] Explanation of icon numbers:

[0037] 1. Top plate; 2. Bottom plate; 3. Support plate; 301. Adjustment groove; 4. Conveying channel; 401. Fish body inlet end; 402. Fish body outlet end; 403. Bottom hole of pelvic fin; 404. Track protrusion block; 405. Bolt rod; 5. Fish tail clamping mechanism; 501. Fish tail telescopic pump; 502. Fish tail mounting block; 5021. Fan-shaped cavity; 503. Fan-shaped block; 5031. Bottom surface of fan-shaped block; 504. Fish tail fixing block; 6. Dorsal fin removal mechanism; 601. Dorsal fin telescopic pump; 602. Fish fin fixing block; 6021. Fixing block; 603. 604. Open cavity; 605. Dorsal fin telescopic pump; 606. Movable block; 607. Protruding toothed blade; 7. Fish head clamping mechanism; 708. Fish head telescopic pump; 709. Fish head fixing block; 7000. Clamping block assembly; 7001. Fish head accommodating space; 701. Central through hole; 702. Spring; 703. Curved groove; 8. Fish body; 804. Fish head; 805. Dorsal fin; 806. Fish tail; 807. Pelvic fin; 9. Pelvic fin removal mechanism; 906. Pelvic fin telescopic pump; 907. Pelvic fin removal push plate; 908. Side groove; 909. Pelvic fin removal protruding blade.

[0038] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0040] This invention proposes a device for removing the bony dorsal and pelvic fins of feed fish.

[0041] Please see Figure 1-7The feed fish boneless dorsal and pelvic fin removal device in this embodiment of the invention includes a top plate 1 disposed above and a bottom plate 2 disposed below. The top plate 1 and the bottom plate 2 are connected by support plates 3 disposed on the front and rear sides respectively to form a frame structure.

[0042] An inclined conveying channel 4 is provided between the top plate 1 and the bottom plate 2. The rear part of the conveying channel 4 is the fish inlet end 401, and the front part is the fish outlet end 402. The conveying channel 4 gradually slopes from the fish inlet end 401 to the fish outlet end 402, so after the fish enters the conveying channel 4, it can automatically slide from the fish inlet end 401 to the fish outlet end 402. In addition, above the conveying channel 4, along the fish conveying direction, there are a fish tail clamping mechanism 5, a dorsal fin removal mechanism 6, and a fish head clamping mechanism 7 arranged in sequence. The bottom of the conveying channel 4 is provided with a hollowed-out pelvic fin bottom hole 403, which is vertically opposite to the pelvic fin 804 of the fish body 8. That is, when stimulated, the pelvic fin 804 of the fish body 8 can be exposed downwards. The bottom surface of the conveying channel 4 is also provided with a pelvic fin removal mechanism 9.

[0043] Specifically, the fishtail clamping mechanism 5 of the present invention includes a fishtail telescopic pump 501 fixedly connected to the top plate 1. The housing of the fishtail telescopic pump 501 is fixedly connected to the top plate 1, and the telescopic end of the fishtail telescopic pump 501 extends downward and is fixedly connected to the fishtail mounting block 502. The fishtail mounting block 502 has a fan-shaped cavity 5021 inside, and the bottom of the fan-shaped cavity 5021 has an opening. The inside of the fan-shaped cavity 5021 is pivotally connected to the fan-shaped block 503. The bottom surface 5031 of the fan-shaped block is curved, and the left and right sides of the fan-shaped block 503 are respectively fixedly connected to the fishtail fixing blocks 504 extending to the left and right sides, forming an open receiving opening that is narrow at the top and wide at the bottom through the fishtail fixing blocks 504 provided on both sides.

[0044] Preferably, the included angle between the front and rear sides of the fan-shaped block 503 is smaller than the included angle between the inner walls of the front and rear sides of the fan-shaped cavity 5021. In practical applications, the fan-shaped block 503 can swing back and forth relative to the inside of the fish tail mounting block 502 about the pivot axis, that is, swing along the front and rear extension direction of the fish body, and the fish tail fixing blocks 504 provided on both sides expand to the left and right sides to form an open receiving opening with an unfolded trumpet mouth. When the fish tail fixing block 504 is pushed from top to bottom by the fish tail telescopic pump 501 to gradually contact the fish tail 803 of the fish body 8, the fish tail 803 can be pushed towards the center position. The bottom surface of the fan-shaped block 503 is curved, and the fan-shaped block 503 can swing back and forth relative to the fan-shaped cavity inside the fish tail mounting block 502. Therefore, the bottom surface of the fan-shaped block 503 can be adaptively adjusted to a suitable angle to contact the top of the fish tail 803, or to press or limit the fish tail 803 with forces in different directions.

[0045] The dorsal fin removal mechanism 6 of the present invention includes a dorsal fin telescopic pump 601 fixed to a top plate 1. The telescopic end of the dorsal fin telescopic pump 601 extends downward and is fixedly connected to a fin fixing block 602. The fin fixing block 602 has an open cavity 603 inside. The housing of the dorsal fin removal telescopic pump 604 is installed inside the open cavity 603. The telescopic end of the dorsal fin removal telescopic pump 604 is arranged in a left-right direction and is connected to a movable block 605. The fin fixing block 602 extends downward and has a fixing block 6021 opposite to the movable block 605. By pulling the movable block 605 towards the fixing block 6021, the movable block 605 and the fixing block 6021 can be closed relative to each other. Furthermore, the surfaces of the fixing block 6021 and the movable block 605 opposite to each other are respectively provided with several rows of protruding toothed blades 606 for removing the dorsal fin.

[0046] In practical applications, the dorsal fin telescopic pump 601 extends downwards or upwards, pushing the fin fixing block 602 to move up and down, causing the fixing block 6021 and the movable block 605 to gradually approach or move away from the dorsal fin 802 of the fish body 8. When the fixing block 6021 and the movable block 605 synchronously approach the dorsal fin 802, the dorsal fin shearing telescopic pump 604 pulls the movable block 605 towards the fixing block 6021, causing the protruding toothed blades 606 on the surface of the movable block 605 and the protruding toothed blades 606 on the fixed block 6021 to interlock, thereby removing the dorsal fin 802 from the back of the fish body 8.

[0047] Preferably, the protruding toothed blades 606 on the surfaces of the movable block 605 and the fixed block 6021 of the present invention extend along the contact point between the dorsal fin 802 and the fish body 8. In practical applications, the dorsal fin extension pump 601 pushes the fin fixing block 602 downward, so that the interlocking position of the movable block 605 and the fixed block 6021 gradually approaches the root of the dorsal fin 802, thereby removing the dorsal fin 802 as completely as possible and ensuring that the hard bony spines of the dorsal fin 802 will not harm the mandarin fish during feeding.

[0048] Preferably, in this embodiment, the protruding toothed blade 606 has a structure with multiple rows of teeth arranged from top to bottom, and the protruding toothed blade 606 on the surface of the movable block 605 and the protruding toothed blade 606 on the surface of the fixed block 602 are staggered by a tooth spacing in the vertical direction to ensure that the two pairs of protruding toothed blades 606 on the left and right sides are fully engaged.

[0049] The fish head clamping mechanism 7 of the present invention includes a fish head telescopic pump 701 fixedly connected to the top plate 1. The telescopic end of the fish head telescopic pump 701 extends downward and is fixedly connected to the fish head fixing block 702. The bottom edge of the fish head fixing block 702 is inclined downward. Several clamping block groups 703 are symmetrically pivotally connected to the two sides of the fish head fixing block 702. Each clamping block group 703 includes a left clamping block 7031 and a right clamping block 7032. The bottom swing arm of the left clamping block 7031 and the bottom swing arm of the right clamping block 7032 form a fish head receiving space 704 that is narrow at the top and wide at the bottom. The fish head receiving space 704 can clamp and fix the surface of the fish head 801 of the fish body 8.

[0050] Additionally, the fish head fixing block 702 has several intermediate through holes 705 in its center. These intermediate through holes 705 are axially opposite to each set of clamping block groups 703. A circumferentially movable spring 706 is installed inside the intermediate through hole 705. One end of the spring 706 is fixedly connected to the top swing arm of the left clamping block 7031, and the other end of the spring 706 is fixedly connected to the top swing arm of the right clamping block 7032. For example, the two ends of the spring 706 are fixedly connected to the left clamping block 7031 and the right clamping block 7032 respectively by welding. Therefore, when the left clamping block 7031 and the right clamping block 7032 are not clamping or limiting the fish head 801, the spring 706 passing through the fish head fixing block 702 provides elastic support to the top swing arms of the left clamping block 7031 and the right clamping block 7032, and the bottom swing arms of the left clamping block 7031 and the right clamping block 7032 move closer to each other. As the left clamping block 7031 and right clamping block 7032 move downwards along with the fish head fixing block 702, they begin to clamp the fish head. At this point, the lower parts of the bottom swing arms of the left clamping block 7031 and right clamping block 7032 gradually open downwards, while the spring 706 gradually increases in compression to clamp and support the surface of the fish head 801 of the fish body 8. Simultaneously, since the clamping block assembly 703 of this invention comprises multiple sets, each clamping block assembly 703 can adaptively adjust the clamping opening and clamping force according to the different positions of the fish head 801, ensuring reliable fixation of the fish head 801 without causing damage.

[0051] Please see Figure 6Preferably, the bottom surface of the fish head fixing block 702 of the present invention is provided with a curved groove 707, and the depth of the curved groove 707 gradually decreases along the fish body conveying direction. Since the surface height of the tilapia head 801, which is used as feed fish, gradually decreases from back to front, by providing a curved groove 707 on the bottom surface of the fish head fixing block 702 that conforms to the change in surface height of the fish head 801, not only can the fish head 801 be fixed in place to prevent it from shifting, but also excessive pressure damage to different positions of the fish head 801 can be avoided during the pressing process of the fish head fixing block 702 due to the lack of height change.

[0052] The pelvic fin removal mechanism 9 of the present invention includes a pelvic fin telescopic pump 901 fixedly connected to the bottom surface of the conveying channel 4. The telescopic end of the pelvic fin telescopic pump 901 extends and retracts toward the fish head 801. The telescopic end of the pelvic fin telescopic pump 901 is fixedly connected to the pelvic fin removal push plate 902. The top edge of the pelvic fin removal push plate 902 is provided with a pelvic fin removal protruding knife 904. The cutting edge of the pelvic fin removal protruding knife 904 faces forward and is set as close as possible to the bottom surface of the conveying channel 4. Preferably, the gap between the pelvic fin removal protruding knife 904 and the outer surface of the conveying channel 4 is 1-2 mm, so that during the removal of the pelvic fin 804, the position where the pelvic fin 804 is separated from the abdomen of the fish is as close as possible to the abdomen of the fish. In actual operation, after the fish tail 803 and fish head 801 of the fish body 8 are initially positioned by the downward tail clamping mechanism 5 and the head clamping mechanism 7 respectively, the tilapia body 8 is squeezed, and its dorsal fin 802 opens upward and its pelvic fin 804 opens downward. The pelvic fin 804 opens downward and passes outward through the hollowed-out pelvic fin bottom hole 403 at the bottom of the conveying channel 4. The pelvic fin telescopic pump 901 pushes the pelvic fin removal push plate 902 towards the pelvic fin 804. The pelvic fin removal protrusion 904 pushes the pelvic fin 804 towards the front end of the hollowed-out pelvic fin bottom hole 403. When the position where the pelvic fin 804 is connected to the abdomen of the fish body moves forward to the front edge of the pelvic fin bottom hole 403, the pelvic fin 804 will be stopped by the front end of the pelvic fin bottom hole 403. Then, the blade of the pelvic fin removal protrusion 904 removes the pelvic fin 804 of the fish body 8 and the hard bone inside the pelvic fin 804.

[0053] Preferably, the left and right sides of the conveying channel 4 of the present invention are respectively provided with track protrusions 404 arranged along the length direction, and the ventral fin removal push plate 902 is provided with a side groove 903 and slides in cooperation with the track protrusions 404. Therefore, when the ventral fin telescopic pump 901 pushes the ventral fin removal push plate 902 forward, the ventral fin removal push plate 902 moves forward reliably along the track protrusions 404, and the ventral fin removal protrusion blade 904 reliably removes the ventral fin 804 and its internal hard bone.

[0054] In the technical solution of this invention, upward-extending limiting structures, such as mesh plates, can be provided on the left and right sides of the conveying channel 4 to limit the lateral movement of the tilapia. Corresponding adjustment grooves 301 can also be provided on the side of the support plate 3, and bolt rods 405 can be provided on the side of the conveying channel 4 and fixed with nuts to adjust the actual installation position and angle of the conveying channel 4.

[0055] The feed fish boneless dorsal and pelvic fin removal device of the present invention is not limited to the removal of dorsal and pelvic fins of tilapia, but can also be applied to the removal of other fish with dorsal and / or pelvic fins, such as plecos that proliferate in rivers.

[0056] Please see Figure 1-7 The present invention also proposes a method for raising mandarin fish using the above-mentioned feed fish bone removal device for dorsal and pelvic fins.

[0057] Live tilapia used as feed fish are captured, and all target feed fish are sieved through screens of different inner diameters. They are divided into several groups according to different size ranges, and feed fish with bony dorsal and ventral fin removal devices of different sizes are selected according to different size ranges to remove the bony dorsal and ventral fins of feed fish of different sizes.

[0058] By feeding the target feed fish into the conveying channel 4 from the fish body inlet end 401, the fish head extension pump 701 of the fish head clamping mechanism 7 pushes the fish head fixing block 702 downward in advance, so that when the fish body 8 moves from the fish body inlet end 401 to the fish body outlet end 402, the fish head 801 is initially limited by the curved groove 701 of the fish head fixing block 702. The fish tail extension pump 501 of the fish tail clamping mechanism 5 pushes the fish tail mounting block 502 downward, and the fish tail fixing blocks 504 extending on the left and right sides gradually push the fish tail 803 towards the center, so that the fish tail 803 gradually approaches the bottom surface of the fan-shaped block 503. As the fish tail mounting block 502 continues to move downward, the fan-shaped block 503 swings relative to the inside of the fan-shaped cavity 5021, and the bottom surface 5031 of the fan-shaped block finally presses the surface of the fish tail 803 at a suitable angle. At the same time, the fish head telescopic pump 501 continues to push the fish head fixing block 504 downward, and different clamping block groups 703 elastically clamp and limit the surface of the fish head 801. After the fish head 801 and fish tail 803 of the fish body 8 are compressed, the dorsal fin 802 of the fish body 8 is pushed upward and the pelvic fin 804 of the fish body 8 is pushed downward through the bottom hole 403 of the pelvic fin.

[0059] When it is necessary to remove the dorsal fin 802 and pelvic fin 804 of the fish body 8, the dorsal fin removal mechanism 6 uses a dorsal fin telescopic pump 601 to push the fin fixing block 602 downwards to the position where the dorsal fin meets the back of the fish body. Then, the dorsal fin shearing telescopic pump 604 pulls the movable block 605 towards the fin fixing block 602. The protruding toothed blades 606 on the opposing surfaces of the movable block 605 and the fixing block 6021 engage with each other to remove the dorsal fin 802 on the back of the fish body 8. At the same time, the pelvic fin telescopic pump 901 pushes the pelvic fin removal push plate 902 towards the pelvic fin 804. The pelvic fin removal protruding blade 904 removes the pelvic fin 804 of the fish body 8 and the hard bone inside the pelvic fin 804. After the above steps, the dorsal fin 802 and pelvic fin 804 of the tilapia can be completely removed.

[0060] After the dorsal fin 802 and pelvic fin 804 of the target feed fish located inside the conveying channel 4 are removed, they are reset upward by the fish head clamping mechanism 7, the dorsal fin removal mechanism 6, and the fish tail clamping mechanism 5, and reset backward by the pelvic fin removal mechanism 6. The processed target feed fish enter the collection box from the fish body outlet end 402 of the conveying channel 4.

[0061] After a certain number of target feed fish are collected, a 4-6 mg / L potassium permanganate solution is injected into the collection box to clean and disinfect the live target feed fish. After standing for 8-12 minutes, the target feed fish are transported through the transport channel to the mandarin fish farming water body that is suitable for the corresponding feeding size, so that the target feed fish are chased and foraged by the mandarin fish in the mandarin fish farming water body.

[0062] In mandarin fish farming, when diseases occur, the fish show no interest in feed mixed with medication but in a static state. This invention addresses this issue by using a feed fish with bony dorsal and pelvic fin removal device to remove the dorsal and pelvic fins of the target feed fish. After disinfection and settling, the target feed fish are transferred to a pre-cooked starch solution mixed with medication. The target feed fish swim in the starch solution, their surfaces adhering to the solution. This starch-coated feed fish are then transferred to the mandarin fish farming water, where they are chased and fed by the mandarin fish, who then consume the feed fish with the medication on their surface, thus achieving the goal of administering medication to the mandarin fish.

[0063] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A device for removing bony dorsal and pelvic fins from feed fish, characterized in that, It includes a top plate at the top and a bottom plate at the bottom, which are connected by a support plate to form a frame structure. An inclined conveying channel is provided between the top plate and the bottom plate, which gradually slopes from the fish inlet end to the fish outlet end. Above the conveying channel, along the fish conveying direction, there are a fish tail clamping mechanism, a dorsal fin removal mechanism, and a fish head clamping mechanism. The bottom of the conveying channel has a hollowed-out ventral fin bottom hole that is opposite to the ventral fin of the fish. The bottom surface of the conveying channel is also provided with a ventral fin removal mechanism.

2. The feed fish bony dorsal and pelvic fin removal device as described in claim 1, characterized in that, The fish tail clamping mechanism includes a fish tail telescopic pump fixedly connected to the top plate. The telescopic end of the fish tail telescopic pump extends downward and is fixedly connected to the fish tail mounting block. The fish tail mounting block has a fan-shaped cavity inside. The inside of the fan-shaped cavity is pivotally connected to the fan-shaped block. The bottom surface of the fan-shaped block is curved, and the left and right sides of the fan-shaped block are respectively fixed to the outwardly unfolding fish tail fixing blocks. The fish tail fixing blocks form an open receiving opening that is narrow at the top and wide at the bottom.

3. The feed fish bony dorsal and pelvic fin removal device as described in claim 2, characterized in that, The included angle between the front and rear sides of the sector block is smaller than the included angle between the inner walls of the front and rear sides of the sector block corresponding to the sector cavity.

4. The feed fish bony dorsal and pelvic fin removal device as described in claim 1, characterized in that, The dorsal fin removal mechanism includes a dorsal fin telescopic pump fixed to the top plate. The telescopic end of the dorsal fin telescopic pump extends downward and is fixedly connected to the fin fixing block. The fin fixing block has an open cavity inside and is fixedly connected to the housing of the dorsal fin removal telescopic pump. The telescopic end of the dorsal fin removal telescopic pump is set in the left-right direction and is connected to the movable block. The fin fixing block has a fixed block and the movable block are horizontally opposite to each other and can fit together. The opposite surfaces of the fixed block and / or the movable block are provided with protruding toothed blades for removing the dorsal fin.

5. The feed fish bony dorsal and pelvic fin removal device as described in claim 4, characterized in that, The trajectory of the protruding toothed blade coincides with the trajectory of the dorsal fin contacting the fish's body.

6. The feed fish bony dorsal and pelvic fin removal device as described in claim 1, characterized in that, The fish head clamping mechanism includes a fish head telescopic pump fixedly connected to the top plate. The telescopic end of the fish head telescopic pump extends downward and is fixedly connected to the fish head fixing block. The bottom edge of the fish head fixing block is inclined downward and has several clamping block groups symmetrically pivotally connected on the left and right sides. Each clamping block group includes a left clamping block and a right clamping block. The space between the bottom swing arm of the left clamping block and the bottom swing arm of the right clamping block is narrower at the top and wider at the bottom. The middle of the fish head fixing block has several through holes opposite to each clamping block group. A spring is installed inside the through holes. One end of the spring is fixedly connected to the top swing arm of the left clamping block, and the other end of the spring is fixedly connected to the top swing arm of the right clamping block. The bottom surface of the fish head fixing block has a curved groove, and the depth of the curved groove gradually decreases along the fish body conveying direction.

7. The feed fish bony dorsal and pelvic fin removal device as described in claim 1, characterized in that, The pelvic fin removal mechanism includes a pelvic fin telescopic pump fixedly connected to the conveying channel. The telescopic end of the pelvic fin telescopic pump extends and retracts towards the fish head. The telescopic end of the pelvic fin telescopic pump is fixedly connected to the pelvic fin removal push plate. The top edge of the pelvic fin removal push plate is provided with a pelvic fin removal protruding knife. The gap between the cutting edge of the pelvic fin removal protruding knife and the outer surface of the conveying channel is 1-2mm.

8. The feed fish bony dorsal and pelvic fin removal device as described in claim 7, characterized in that, The left and right sides of the conveying channel are respectively provided with track protrusions along the length of the conveying channel, and the ventral fin removal push plate is provided with side grooves and slides in cooperation with the track protrusions.

9. A method for farming mandarin fish using the feed fish bony dorsal and pelvic fin removal device as described in any one of claims 1-8, characterized in that, Includes the following steps: Step S1: Capture the live fish to be used as target feed fish, and sieve and group all the target feed fish through sieves of different inner diameter sizes; Step S2: Fix the head and tail of the target feed fish respectively, remove the dorsal and pelvic fins of the fish, and collect the processed target feed fish. Step S3: After a certain number of target feed fish have been collected, potassium permanganate solution is injected into the collection box to clean and disinfect the live target feed fish. After standing, the target feed fish are transported through the transport channel to the mandarin fish farming water body that is in line with the corresponding feeding size, so that the target feed fish swim in the mandarin fish farming water body and are chased and foraged by the farmed mandarin fish. Step S4: After the target feed fish have been left to stand and disinfected, they are transferred to a pre-cooked starch solution mixed with medication. The target feed fish swim in the starch solution and the starch solution adheres to their surface. The target feed fish with the starch solution attached are then transferred to the mandarin fish farming water to swim, where they are chased and foraged by the farmed mandarin fish.

10. The method for farming mandarin fish as described in claim 9, characterized in that, Step S2 includes the following steps: Step S21: The target feed fish is fed into the conveying channel from the fish body inlet end. The fish head clamping mechanism pushes the fish head fixing block downward in advance, and the fish head is initially limited. The fish tail clamping mechanism expands the fish tail fixing blocks on the left and right sides, gradually pushing the fish tail towards the middle. The fan-shaped block swings relative to the inside of the fan-shaped cavity as the fish tail mounting block continues to move downward, pressing the fish tail surface at a suitable angle. Step S22: The fish head telescopic pump continues to push the fish head fixing block downwards. Different clamping block groups elastically clamp and limit the surface of the fish head. After the fish head and tail are compressed, the dorsal fin of the fish body is pushed upwards and the pelvic fin of the fish body is pushed downwards through the bottom hole of the pelvic fin. Step S23: When it is necessary to remove the dorsal and pelvic fins of the fish, the dorsal fin telescopic pump pushes the fin fixing block downwards to the position where the dorsal fin meets the back of the fish. Then, the dorsal fin shearing telescopic pump pulls the movable block towards the fin fixing block. The protruding teeth on the opposite surfaces of the movable block and the fixing block bite each other to remove the dorsal fin. The pelvic fin telescopic pump pushes the pelvic fin removal push plate towards the pelvic fin. The pelvic fin removal protruding knife removes the pelvic fin and its internal hard bones. The fish head clamping mechanism, dorsal fin removal mechanism, and fish tail clamping mechanism reset upwards, and the pelvic fin removal mechanism resets backwards.

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