A fish bleeding apparatus and method of use

Abstract

The application discloses a fish bloodletting device and a use method thereof, and is provided with a dormancy mechanism, a recognition and positioning mechanism, a sucking disc assembly and a bloodletting mechanism. The electric stimulation part of the dormancy mechanism is used to electrically stimulate the fish body so that the fish body is in a dormant state. Then, the fish body is transported to the recognition and positioning mechanism. An industrial camera is used to collect the whole fish body image and obtain the fish body size parameters and the gill cover position. A biological microscope camera is used to shoot and obtain the fish tail artery and vein blood vessel position. The sucking disc assembly is used to flexibly adsorb the fish body. The position of the sucking disc assembly is changed under the control of a sucking disc position changing part. The sucking disc position changing part adjusts the fish body posture and position according to the fish body characteristic information obtained by the recognition and positioning mechanism, so that the sucking disc assembly and the adsorbed fish body are directly opposite the predetermined position of the bloodletting mechanism, and accurate bloodletting treatment is carried out.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fish processing, in particular to a fish bleeding device and a use method thereof. BACKGROUND

[0002] In the field of fish bleeding processing, most of the current domestic scenes use manual operation for bleeding operation, and part of the professional bleeding equipment is still in the research and development stage, which is easy to cause incomplete bleeding and affect the quality and shelf life of fish meat color and luster. Foreign fish processing equipment can process specific types of seawater fish, with high automation and integration. Germany Baader Company uses machine vision to realize information collection, positioning and automatic monitoring of appearance quality of fish body, and uses intelligent identification and sorting technology in processing and production, which can realize mechanical operation of fish bleeding and evisceration. Sweden Arenco Company has carried out research on production optimization sorting system, which uses industrial cameras and mechanical parts to realize control of feeding amount, removal of damaged and defective fish and recovery of misplaced products, so as to realize automatic monitoring of processing quality.

[0003] A fish bleeding device for fish processing is disclosed in a prior art Chinese patent with authorization publication number CN211672197U, which comprises a support frame, a retractable bleeding knife assembly and a cleaning assembly arranged on the support frame; a conveying mechanism horizontally arranged below the bleeding knife assembly and the cleaning assembly, with a material table and a collection box arranged at the beginning and the end of the conveying mechanism respectively; the retractable bleeding knife assembly and the cleaning assembly are arranged in sequence on the support frame along the conveying direction of the conveying mechanism. The fish on the material table is put on the beginning of the conveying mechanism by manual operation, and when the fish is conveyed to the bottom of the retractable bleeding knife assembly, the retractable bleeding knife assembly is extended to bleed the fish on the conveying mechanism. The fish after bleeding runs to the bottom of the cleaning assembly, and the cleaning assembly washes the fish after bleeding. Finally, the washed fish falls into the collection box for collection.

[0004] There are many current domestic bleeding equipment patents, mainly involving fish body conveying and clamping, channel extrusion bleeding, water injection and punching bleeding, puncture drainage and other bleeding technologies and equipment structures, but not involving how to avoid the impact of fish activity on production, precise identification and positioning of bleeding position, flexible adsorption of fish body and low-loss bleeding and other technical needs. SUMMARY

[0005] The purpose of the present application is to provide a fish bleeding device and a use method thereof, which can meet the technical needs of avoiding the impact of fish activity on production, precise identification and positioning of bleeding position, flexible adsorption of fish body and low-loss bleeding.

[0006] The purpose of the present application is achieved by a fish bleeding device, which comprises a sleep mechanism, an identification and positioning mechanism, a suction cup assembly and a bleeding mechanism.

[0007] The hibernation mechanism comprises a hibernation section conveyor for conveying the fish to the next station, and an electric stimulation component for electrically stimulating the fish to put the fish into a hibernation state;

[0008] The identification positioning mechanism comprises a belt conveyor connected to the hibernation section conveyor, and an industrial camera and a biological microscope camera arranged on the conveying path of the belt conveyor, the industrial camera being used to capture the image of the whole fish and obtain the size parameters and the position of the operculum of the fish, and the biological microscope camera being used to capture and obtain the positions of the arterial and venous blood vessels of the tail of the fish;

[0009] The suction cup assembly is used to flexibly adsorb the fish, and is provided with a suction cup displacement component that adjusts the posture and position of the fish according to the characteristic information of the fish obtained by the identification positioning mechanism, and the suction cup assembly is displaced from the discharge end of the belt conveyor to a predetermined position of the bleeding mechanism under the driving of the suction cup displacement component to bleed the fish.

[0010] Further, the hibernation mechanism comprises:

[0011] A hibernation section frame, wherein the hibernation section conveyor is installed on the hibernation section frame;

[0012] A hibernation section upper support installed on the hibernation section frame by a plurality of supporting legs and above the hibernation section conveyor, wherein a pair of left and right distributed electrode plates connected to the power supply are installed on the hibernation section upper support;

[0013] A plurality of hibernation frames with an open upper end for containing the fish and water, wherein a pair of left and right distributed electrode plates in contact with the water in the hibernation frame are installed on each hibernation frame, and the electrode plates and the electrode plates constitute the electric stimulation component, when the hibernation frame is in a predetermined electric stimulation position, the two electrode plates of the hibernation frame respectively contact two electrode plates, and the fish in the hibernation frame is electrically stimulated.

[0014] Further, the hibernation mechanism further comprises a water tank, the lower end of the water tank has a water outlet, the water tank is fixedly connected to the hibernation section upper support, and the water tank and the electrode plates are sequentially and spacedly distributed along the conveying direction of the hibernation section conveyor; when the hibernation frame is filled with water, the hibernation frame is located directly below the water tank.

[0015] Further, the identification positioning mechanism comprises:

[0016] An identification section support, wherein the belt conveyor is installed in the identification section support;

[0017] The light guide plate fixedly connected with the recognition part support is located directly below the biological microscope, and corresponds to the position of the fish tail. When the fish tail moves to the light guide plate, the biological microscope photographs and obtains the positions of the arterial and venous blood vessels of the fish tail.

[0018] Further, the suction cup assembly comprises:

[0019] A suction cup mounting plate connected with the suction cup displacement component;

[0020] A plurality of telescopic rod members vertically fixed to the working plate surface of the suction cup mounting plate, and a fish body suction cup is mounted at the end of each telescopic rod member. When the fish body is contacted, the telescopic rod member is telescopically arranged and adaptively shrunk when the fish body is adsorbed.

[0021] Further, the telescopic rod member is a nitrogen gas spring, the nitrogen gas spring is provided with a spring fixing clamp, the fish body suction cup is provided with a buffer connecting pipe and connected with the telescopic rod of the nitrogen gas spring through the buffer connecting pipe, the spring fixing clamp is fixedly connected to the working plate surface of the suction cup mounting plate through a mounting rod, the spring fixing clamp is an automatic clamping mechanism and controlled by the control system, and the telescopic rod of the nitrogen gas spring is clamped and locked when the telescopic length of the nitrogen gas spring needs to be locked.

[0022] Further, the blood letting mechanism comprises:

[0023] A blood letting part support;

[0024] At least two electric push rods mounted on the blood letting part support, and a blood letting knife for puncturing the fish body is fixed at the end of the telescopic part of each electric push rod;

[0025] In addition, the suction cup displacement component comprises:

[0026] A first electric screw rod sliding table mounted in the blood letting part support;

[0027] A torque motor fixedly connected with the movable part of the first electric screw rod sliding table, and the torque motor is used for outputting torque;

[0028] A slider electric cylinder fixedly connected with the rotary output part of the torque motor, a movable part of the slider electric cylinder is fixedly connected with the suction cup mounting plate, and the movable track of the slider electric cylinder is perpendicular to the movable track of the first electric screw rod sliding table.

[0029] Further, the blood letting mechanism is provided with:

[0030] A second electric screw rod sliding table fixedly connected with the blood letting part support;

[0031] A buffer suction cup connected with the moving part of the second electric screw rod sliding table through a buffer connecting pipe and buffering the contact with the surface of the fish body during the blood letting process of the fish body.

[0032] Further, the bloodletting knives are divided into a first bloodletting knife and a second bloodletting knife, and when the fish is punctured for bloodletting, the first bloodletting knife and the second bloodletting knife are respectively opposite to the tail blood vessels and the gill blood vessels of the fish body adsorbed by the suction cup assembly through the adjustment of the suction cup displacement component.

[0033] As another aspect of the present application, the method for using the fish bloodletting device comprises the following steps:

[0034] The electric stimulation sleep step uses the electric stimulation component of the sleep mechanism to electrically stimulate the fish body to make the fish body in a sleep state, and then the fish body is fed to the feeding end of the belt conveyor of the identification positioning mechanism;

[0035] The identification positioning step uses the belt conveyor of the identification positioning mechanism to feed the fish body, so that the fish body passes through the industrial camera and the biological microscope camera in sequence, the industrial camera is used to collect the image of the whole fish body and obtain the fish body size parameters and the gill cover position, and the biological microscope camera is used to shoot and obtain the fish tail artery and vein blood vessel position, and after the fish body passes through the industrial camera and the biological microscope camera in sequence, the fish body is moved to the discharging end of the belt conveyor through the feeding action of the belt conveyor;

[0036] The fish body adsorption step is that the suction cup assembly is downwardly opposite to and flexibly adsorbs the fish body at the discharging end of the belt conveyor, the position of the suction cup assembly is changed under the control of the suction cup displacement component, the fish body posture and position are adjusted according to the fish body characteristic information obtained by the identification positioning mechanism, so that the suction cup assembly and the adsorbed fish body are opposite to the predetermined position of the bloodletting mechanism;

[0037] The bloodletting step uses the bloodletting mechanism to perform bloodletting treatment on the corresponding blood vessel position of the fish body.

[0038] The present application has the following beneficial effects:

[0039] 1. The tail bloodletting, gill bloodletting or combined bloodletting of the fish body can be realized respectively, the fish body is flexibly contacted and adsorbed by the suction cup assembly without damaging the appearance of the fish body, the nitrogen spring can be adaptively stretched and contracted according to the shape of the fish body, and the fish body has high compatibility with the variety and size of the fish body;

[0040] 2. The sleep mechanism based on the electric stimulation anesthesia principle can electrically stimulate the fish body to physically sleep without killing the fish body, has beneficial effects on the subsequent positioning of the fish body, does not affect the activity of the fish body and the bloodletting effect of the fish body after processing by the equipment, and the mobile electrode energization mode is adopted to improve the safety of the equipment;

[0041] 3. The fish bloodletting device can accurately obtain the position of the tail blood vessels of the fish body by combining the use of the backlight plate and the biological microscope camera, can minimize the puncture area, has the least impact on the activity of the fish body if only the tail is punctured, can realize gentle bloodletting processing and reduce the stress of the fish body during bloodletting, and can speed up the bloodletting effect by synchronously puncturing the gill part, can avoid the influence of the gill cover on the puncture effect by puncturing the gill after the gill cover is adsorbed and stretched by the buffer suction cup, and does not affect the overall appearance of the fish body, realizes the effect of low loss and high quality;

[0042] 4. The combination of a plurality of fish body suction cups with buffer connecting pipes, nitrogen gas springs and spring fixing clamps can flexibly adsorb according to the shape characteristics of the fish body, realize accurate control of the position of the fish body, and the adsorption structure composed of a plurality of suction cups can ensure the accuracy of adsorption and the applicability of the fish body variety, which can well realize the purpose of bloodletting for the fish body under the joint action of the identification positioning mechanism and the bloodletting mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 is the overall diagram of the device of the present application.

[0044] Figure 2 is the schematic diagram of the dormant mechanism.

[0045] Figure 3 is the schematic diagram of the identification positioning mechanism.

[0046] Figure 4 is the schematic diagram of the bloodletting mechanism.

[0047] Figure 5 is the schematic diagram of the suction cup assembly. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings of the embodiments of the present application. Figures 1-5 The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings of the embodiments of the present application.

[0049] As shown in the drawings, Figures 1-5 a fish bloodletting device is proposed, which comprises a dormant mechanism 1, an identification positioning mechanism 2, a suction cup assembly 3 and a bloodletting mechanism 4.

[0050] The above-mentioned dormant mechanism 1 comprises a dormant part conveyor 102 for conveying the fish body to the next station, and an electric stimulation part for electrically stimulating the fish body to make the fish body in a dormant state.

[0051] The above-mentioned identification positioning mechanism 2 comprises a belt conveyor 202 connected with the sleep part conveyor 102, and an industrial camera 204 and a biological microscope camera 205 arranged in sequence on the conveying path of the belt conveyor 202, the industrial camera 204 is used to collect the whole fish image and obtain the fish body size parameters and the gill cover position, and the biological microscope camera 205 is used to shoot and obtain the fish tail arteriovenous vessel position, so as to facilitate the subsequent accurate bleeding process.

[0052] The above-mentioned suction cup assembly 3 is used for flexible adsorption of fish, which is configured with a suction cup displacement component, the suction cup displacement component adjusts the fish posture and position according to the fish characteristic information obtained by the identification positioning mechanism 2, and the suction cup assembly 3 is driven by the suction cup displacement component to be displaced from the discharge end of the belt conveyor 202 to the predetermined position of the bleeding mechanism 4 to bleed the fish.

[0053] Among them, as shown in Figure 2 The above-mentioned sleep mechanism 1 comprises:

[0054] A sleep part rack 101, the sleep part conveyor 102 is installed on the sleep part rack 101;

[0055] A sleep part upper support 103, the sleep part upper support 103 is installed on the sleep part rack 101 through a plurality of supporting legs and is above the sleep part conveyor 102, and a pair of left and right distributed electrode sheets 105 connected with the power supply are installed on the sleep part upper support 103;

[0056] A plurality of sleep frames 106 for containing fish and water, the upper end of each sleep frame 106 is open, and a pair of left and right distributed electrode plates 107 in contact with the water in the sleep frame 106 are installed on each sleep frame 106, the electrode sheet 105 and the electrode plate 107 constitute an electric stimulation component, when the sleep frame 106 is at a predetermined electric stimulation position, the two electrode plates 107 of the sleep frame 106 respectively contact the two electrode sheets 105, and the water in the sleep frame 106 is electrified, so as to form electric stimulation to the fish in the sleep frame 106;

[0057] A water tank 104, the lower end of the water tank 104 has a water outlet, the water tank 104 is fixedly connected with the sleep part upper support 103, and the water tank 104 and the electrode sheet 105 are sequentially and spacedly distributed along the conveying direction of the sleep part conveyor 102, when the sleep frame 106 is filled with water, the sleep frame 106 is located directly below the water tank 104.

[0058] Among them, as shown in Figure 3 The above-mentioned identification positioning mechanism 2 comprises:

[0059] An identification part support 201, the belt conveyor 202 is installed in the identification part support 201;

[0060] The light guide plate 203 of the fixed connection recognition part support 201 is directly below the biological microscope 205, and the light guide plate 203 corresponds to the position of the fish tail. When the fish tail moves to the light guide plate 203, the fish tail is just on the light guide plate 203. With the assistance of the light guide plate 203, the biological microscope 205 can clearly capture and obtain the positions of the arteriovenous vessels of the fish tail, which can be used as the position reference for subsequent puncture and bloodletting.

[0061] The two front and rear distributed synchronous conveying belts 202a are synchronously driven and connected with the belt conveyor 202, and the light guide plate 203 is between and close to the two synchronous conveying belts 202a.

[0062] As shown in Figure 5 The above-mentioned suction cup assembly 3 comprises:

[0063] The suction cup mounting plate 304 is connected with the suction cup displacement part;

[0064] A plurality of telescopic rod members are vertically fixed to the working plate surface of the suction cup mounting plate 304. The end of each telescopic rod member is provided with a fish body suction cup 301 for contacting the fish body. When contacting the fish body, the telescopic rod member is telescopically arranged and adaptively shrunk when the fish body is adsorbed.

[0065] The telescopic rod member is a nitrogen gas spring 302, which is provided with a spring fixing clamp 303. The fish body suction cup 301 is provided with a buffer connector and is connected to the telescopic rod of the nitrogen gas spring 302 through the buffer connector. The spring fixing clamp 303 is fixedly connected to the working plate surface of the suction cup mounting plate 304 through the mounting rod. The spring fixing clamp 303 is an automatic clamping mechanism and is controlled by the control system. The spring fixing clamp 303 is preferably an electromagnetic clamping device (which generates a magnetic attraction force to perform clamping action after being electrified, which is a conventional mechanical component). When it is necessary to lock the telescopic length of the nitrogen gas spring 302, the spring fixing clamp 303 clamps and locks the telescopic rod of the nitrogen gas spring 302.

[0066] As shown in Figure 4 The above-mentioned bloodletting mechanism 4 comprises:

[0067] The bloodletting part support 401;

[0068] Two electric push rods 404 are installed on the bloodletting part support 401. The end of the telescopic part of each electric push rod 404 is fixed with a bloodletting knife for puncturing the fish body.

[0069] In addition, the suction cup displacement part comprises:

[0070] The first electric screw rod sliding table 305 is installed in the bloodletting part support 401;

[0071] The force moment motor 306 is fixedly connected with the movable part of the first electric screw slide 305, and is used for outputting torque;

[0072] The slide cylinder 307 is fixedly connected with the rotating output part of the force moment motor 306, and the movable part of the slide cylinder 307 is fixedly connected with the suction cup mounting plate 304. The movable track of the slide cylinder 307 is perpendicular to the movable track of the first electric screw slide 305. The movable part of the first electric screw slide 305 moves horizontally, and the force moment motor 306 rotates up and down to adjust the position of the suction cup assembly 3, so that the related blood vessels of the fish body can be vertically positioned to the bleeding knife, and the fish body can be precisely punctured and bled.

[0073] In order to buffer the fish body, the bleeding mechanism 4 is provided with:

[0074] The second electric screw slide 406 is fixedly connected with the bleeding part support 401.

[0075] The buffer suction cup 405 is connected with the moving part of the second electric screw slide 406 through the buffer connecting pipe, and buffers the surface of the fish body during the bleeding process.

[0076] As a preferred solution, the bleeding knife is divided into the first bleeding knife 402 and the second bleeding knife 403. When the fish body is punctured and bled, the first bleeding knife 402 and the second bleeding knife 403 are respectively vertically positioned to the tail blood vessels and the gill blood vessels of the fish body adsorbed by the suction cup assembly 3 through the adjustment of the suction cup displacement part.

[0077] Based on the above fish bleeding equipment, a preferred use method is proposed, which includes the following steps:

[0078] The electric stimulation sleep step uses the electric stimulation part of the sleep mechanism 1 to electrically stimulate the fish body to make the fish body in a sleep state, and then the fish body is fed to the feeding end of the belt conveyor 202 of the identification and positioning mechanism 2.

[0079] In the electric stimulation sleep step, when the sleep frame 106 containing live fish moves directly below the water tank 104, the lower end of the water tank 104 discharges water, and water is injected into the sleep frame 106, so that the water surface is higher than the fish body; when the sleep frame 106 containing live fish and water is moved to the position of the electrode plate 105, the two electrode plates 107 of the sleep frame 106 respectively contact the two electrode plates 105, so that the water in the sleep frame 106 is electrified, and the fish body is electrically stimulated. The conveying chain of the sleep part conveyor 102 is temporarily stopped for a period of time (5-10s), and the fish body is fully electrically stimulated and physically slept. After the physical sleep is completed, the sleep part conveyor 102 is restarted, and the fish body in the sleep state is continuously conveyed, and at the same time, the electrode plate 107 of the sleep frame 106 is separated from the electrode plate 105. The fish body is conveyed to the identification positioning mechanism 2 by the sleep part conveyor 102. This step can use automatic equipment or rely on the weight of the fish body to fall or manually operate to transfer the fish body to the identification positioning mechanism 2, and the transfer mode is not limited here;

[0080] In the identification and positioning step, the fish body is conveyed by the belt conveyor 202 of the identification and positioning mechanism 2. The belt conveyor 202 uses a belt with high friction to prevent the fish body from moving during conveying, so that the fish body passes through the industrial camera 204 and the biological microscope camera 205 in turn. The industrial camera 204 is used to collect the whole fish body image and obtain the fish body size parameters and the gill cover position. The biological microscope camera 205 is used to shoot and obtain the fish tail arteriovenous vessel position. After the fish body passes through the industrial camera 204 and the biological microscope camera 205 in turn, the fish body moves to the discharge end of the belt conveyor 202 under the conveying action of the belt conveyor 202;

[0081] Since the identification and positioning mechanism 2 is provided with the light guide plate 203, the biological microscope camera 205 is located above the light guide plate 203. When the fish tail moves to the light guide plate 203, a backlight effect is formed, so that the biological microscope camera 205 can clearly shoot and obtain the fish tail arteriovenous vessel position;

[0082] In the fish body adsorption step, the suction cup assembly 3 downwardly and flexibly adsorbs the fish body at the discharge end of the belt conveyor 202. The position of the suction cup assembly 3 is changed under the control of the suction cup displacement component. The suction cup displacement component adjusts the posture and position of the fish body according to the fish body characteristic information obtained by the identification and positioning mechanism 2, so that the suction cup assembly 3 and the adsorbed fish body are opposite to the predetermined position of the bleeding mechanism 4;

[0083] In the fish adsorption step, when the suction cup assembly 3 adsorbs the fish on the belt conveyor 202, the fish suction cup 301 of the suction cup assembly 3 faces downward and is directly facing the fish. Then, under the control of the slider electric cylinder 307 of the suction cup displacement component, the suction cup assembly 3 moves downward, so that multiple fish suction cups 301 flexibly contact the fish and adsorb the fish with negative pressure. According to the changes in the shape and thickness of the fish, the telescopic rod of the nitrogen spring 302 will adaptively contract. Then, the spring fixing clamp 303 will automatically clamp and lock the position of the telescopic rod of the nitrogen spring 302 to maintain the position of the adsorbed fish.

[0084] The bleeding step involves using the bleeding mechanism 4 to bleed the fish at the corresponding blood vessel locations.

[0085] After adjustment by the first electric lead screw slide 305, torque motor 306, and slider electric cylinder 307, the position of the fish is aligned with and close to the first bleeding knife 402 and the second bleeding knife 403. It is worth mentioning that the adjustment actions of the first electric lead screw slide 305, torque motor 306, and slider electric cylinder 307 are all based on the fish body feature information obtained by the identification and positioning mechanism 2 to adjust the fish body posture and position, so that the fish body position is accurately matched with the working position of the bleeding knife and the buffer suction cup 405, making the bleeding position of the fish body more accurate in the bleeding step.

[0086] Driven by the corresponding electric push rod 404, the first bleeding knife 402 cuts the blood vessels in the tail of the fish. After the buffer suction cup 405 with the buffer tube suctions and pulls up the gill cover of the fish, the second bleeding knife 403 cuts the blood vessels in the gills of the fish under the drive of the corresponding electric push rod 404. The tail bleeding and gill bleeding can be performed simultaneously or independently in steps, which is not limited here.

[0087] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In this invention, it should also be noted that the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integrally formed connection, a mechanical connection, or an indirect connection through intermediate connecting parts. The specific meaning of the terms in this utility model can be understood according to the specific circumstances.

[0088] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein and no single feature or combination of features should be deemed indicative of the scope of the claims.

[0089] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description is made in this way only for the sake of clarity, and a person skilled in the art should consider the description as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by a person skilled in the art.

Claims

1. A fish bleeding apparatus, characterized by, The device comprises a sleep mechanism (1), an identification and positioning mechanism (2), a suction cup assembly (3) and a bloodletting mechanism (4). The sleep mechanism (1) comprises a sleep part conveyor (102) for conveying fish to the next station and an electric stimulation component for electrically stimulating the fish to make the fish in a sleep state. The identification and positioning mechanism (2) comprises a belt conveyor (202) connected to the sleep part conveyor (102), and an industrial camera (204) and a biological microscope camera (205) arranged on the conveying path of the belt conveyor (202), wherein the industrial camera (204) is used to acquire the whole fish image and obtain the fish size parameters and the gill cover position, and the biological microscope camera (205) is used to shoot and obtain the fish tail artery and vein blood vessel position. The suction cup assembly (3) is used for flexible adsorption of fish, and is provided with a suction cup displacement component, which adjusts the posture and position of the fish according to the fish characteristic information obtained by the identification and positioning mechanism (2), and the suction cup assembly (3) is displaced from the discharge end of the belt conveyor (202) to the predetermined position of the bloodletting mechanism (4) under the driving of the suction cup displacement component to perform bloodletting on the fish.

2. A fish bleeding apparatus according to claim 1, characterised in that: The sleep mechanism (1) comprises: a sleep part rack (101), wherein the sleep part conveyor (102) is installed on the sleep part rack (101); a sleep part upper support (103) installed on the sleep part rack (101) through a plurality of supporting legs and above the sleep part conveyor (102), wherein a pair of left and right distributed electrode sheets (105) connected to a power supply are installed on the sleep part upper support (103); a plurality of sleep frames (106) with open upper ends for containing fish and water, wherein a pair of left and right distributed electrode plates (107) connected to the water in the sleep frame (106) are installed on each sleep frame (106), and the electrode sheet (105) and the electrode plate (107) constitute the electric stimulation component, and when the sleep frame (106) is at a predetermined electric stimulation position, the two electrode plates (107) of the sleep frame (106) respectively contact the two electrode sheets (105) to form electric stimulation on the fish in the sleep frame (106).

3. A fish bleeding apparatus according to claim 2, characterised in that: The sleep mechanism (1) further comprises a water tank (104) with a water outlet at the lower end, wherein the water tank (104) is fixedly connected to the sleep part upper support (103), and the water tank (104) and the electrode sheet (105) are sequentially and spacedly distributed along the conveying direction of the sleep part conveyor (102); when the sleep frame (106) is filled with water, the sleep frame (106) is located directly below the water tank (104).

4. The fish bleeding apparatus according to claim 1, characterized by: The identification and positioning mechanism (2) comprises: an identification part support (201), wherein the belt conveyor (202) is installed in the identification part support (201); The light guide plate (203) of the fixed connection recognition part support (201) is directly below the biological microscope (205), and the light guide plate (203) corresponds to the position of the fish tail, when the fish tail moves to the light guide plate (203), the biological microscope (205) photographs and obtains the position of the arteriovenous blood vessels of the fish tail.

5. The fish bleeding apparatus according to claim 1, characterized in that: The suction cup assembly (3) comprises: A suction cup mounting plate (304) connected to the suction cup displacement component; A plurality of telescopic rod members vertically fixed to the working plate surface of the suction cup mounting plate (304), and a fish body suction cup (301) is mounted at the end of each telescopic rod member for contacting the fish body, and when the fish body is contacted, the telescopic rod member is telescopically arranged and adaptively shrunk when the fish body is adsorbed.

6. A fish bleeding apparatus according to claim 5, characterised in that: The telescopic rod member is arranged as a nitrogen gas spring (302), the nitrogen gas spring (302) is provided with a spring fixing clamp (303), the fish body suction cup (301) is provided with a buffer connecting pipe and connects the telescopic rod of the nitrogen gas spring (302) through the buffer connecting pipe, the spring fixing clamp (303) is fixedly connected to the working plate surface of the suction cup mounting plate (304) through a mounting rod, and the spring fixing clamp (303) is arranged as an automatic clamping mechanism and is controlled by a control system to clamp and lock the telescopic rod of the nitrogen gas spring (302) when the telescopic length of the nitrogen gas spring (302) needs to be locked.

7. A fish bleeding apparatus according to claim 5, characterised in that: The bloodletting mechanism (4) comprises: A bloodletting part support (401); At least two electric push rods (404) mounted on the bloodletting part support (401), and a bloodletting knife for puncturing the fish body is fixed at the end of the telescopic part of each electric push rod (404); In addition, the suction cup displacement component comprises: A first electric lead screw sliding table (305) mounted in the bloodletting part support (401); A torque motor (306) fixedly connected to the movable part of the first electric lead screw sliding table (305), the torque motor (306) is used for outputting torque; A slider electric cylinder (307) fixedly connected to the rotation output part of the torque motor (306), the movable part of the slider electric cylinder (307) is fixedly connected to the suction cup mounting plate (304), and the movable track of the slider electric cylinder (307) is perpendicular to the movable track of the first electric lead screw sliding table (305).

8. A fish bleeding apparatus according to claim 5, characterized in that: The bloodletting mechanism (4) is provided with: A second electric lead screw sliding table (406) fixedly connected to the bloodletting part support (401); A buffer suction cup (405) connected to the moving part of the second electric lead screw sliding table (406) through a buffer connecting pipe and buffering the contact with the surface of the fish body during the bloodletting process of the fish body.

9. A fish bleeding apparatus according to claim 7, characterised in that: The bloodletting knives are divided into a first bloodletting knife (402) and a second bloodletting knife (403), and when the fish body is punctured for bloodletting, the first bloodletting knife (402) and the second bloodletting knife (403) are respectively opposite to the tail blood vessels and the gill blood vessels of the fish body adsorbed by the suction cup assembly (3) through the adjustment of the suction cup displacement component.

10. A method of using the fish bleeding apparatus according to claim 1, characterized by, The method comprises the following steps: The electric stimulation sleep step uses the electric stimulation component of the sleep mechanism (1) to electrically stimulate the fish body to make the fish body in a sleep state, and then the fish body is fed to the feeding end of the belt conveyor (202) of the identification and positioning mechanism (2); The identification and positioning step uses the belt conveyor (202) of the identification and positioning mechanism (2) to feed the fish body, so that the fish body passes through the industrial camera (204) and the biological microscope camera (205) in turn, the industrial camera (204) is used to collect the whole fish body image and obtain the fish body size parameters and the gill cover position, the biological microscope camera (205) is used to shoot and obtain the fish tail arteriovenous vessel position, and after the fish body passes through the industrial camera (204) and the biological microscope camera (205) in turn, the fish body is moved to the discharging end of the belt conveyor (202) by the conveying action of the belt conveyor (202); The fish body adsorption step, the suction cup assembly (3) downwardly faces and flexibly adsorbs the fish body at the discharging end of the belt conveyor (202), the position of the suction cup assembly (3) is changed under the control of the suction cup displacement component, the suction cup displacement component adjusts the fish body posture and position according to the fish body characteristic information obtained by the identification and positioning mechanism (2), so that the suction cup assembly (3) and the adsorbed fish body face the predetermined position of the bleeding mechanism (4); The bleeding step uses the bleeding mechanism (4) to bleed the corresponding blood vessel position of the fish body.

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