Fish slaughtering and processing method

Abstract

The invention relates to the field of fish processing methods, and provides a fish slaughtering and processing method, which solves the defect that the fish processing method in the prior art is low in processing cost, and comprises the following preparation processes: (1) bloodletting and washing live fish or iced fresh fish; (2) conveying to a fin removal area through a conveying belt for fin removal treatment; (3) feeding into a scaling and back-opening device for scaling and back-opening treatment; (4) washing in a foaming pool, removing viscera and gills, and cleaning; and (5) distributing, weighing, pickling, bagging, packaging, code spraying, boxing, stacking and sending into a cold storage.

Description

Technical Field

[0001] The invention relates to the field of fish processing methods, in particular to a fish slaughtering and processing method. Background Art

[0002] The processing steps of fish generally include bleeding, removing fins, scaling, opening the back, removing viscera, gills, cleaning, and packaging. In the bagging and packaging process, different varieties of fish generally require different assembly lines, which has high operating costs.

[0003] Chinese patent publication number CN213451873U discloses a valve group for a rolling vacuum packaging machine, which includes a stop valve body; a mounting seat is arranged at one end of the stop valve body for installation on the packaging machine; a vacuum machine connector passes through the mounting seat, one end of which is connected to a port of the stop valve body and the other end is used to connect to the vacuum machine; a stop valve cover is arranged at the other port of the stop valve body, and a first compression spring, a first gasket, a first diaphragm and a second gasket are arranged in sequence between the stop valve body and the stop valve cover. The utility model connects the air inlet, vacuum chamber and vent valve of the stop valve body respectively through a three-way connection. Since the vacuum-packed fish species are different, the corresponding vacuum pumping time is different. The valve group cannot be applied to the vacuum pumping of different fish species. In the fish vacuum packaging process, in order to ensure the continuity of production, the vacuum packaging of different fish is generally carried out on two production lines. Taking Spanish mackerel and tilapia as an example, when the number of tilapia processed on the same day is much larger than that of Spanish mackerel, if two sets of production lines are used for processing at the same time, the output income of the Spanish mackerel packaging line will not offset the consumption cost of the line operation, resulting in reduced profits. Summary of the invention

[0004] Therefore, in view of the above-mentioned problems, the present invention provides a fish slaughtering and processing method to solve the cost disadvantage of the fish processing method in the prior art.

[0005] To achieve the above object, the present invention adopts the following technical scheme: a fish slaughtering and processing method, comprising the following preparation process:

[0006] (1) Bleeding and rinsing live fish or frozen fish;

[0007] (2) The fish are transported to the finning area via a conveyor belt for finning;

[0008] (3) sending to the descaling and back opening device for descaling and back opening;

[0009] (4) Rinse in the bubble pool, remove the internal organs and gills, and wash;

[0010] (5) Dividing, weighing, pickling, bagging, coding, boxing, palletizing, and sending to cold storage;

[0011] Wherein, the bagging and packaging adopts bagging and packaging equipment, and the bagging and packaging equipment comprises:

[0012] A vacuuming component, used to extract the air in vacuum bags containing different fish and heat-seal the vacuum bags;

[0013] A sorting and identifying component, which is arranged below the vacuuming component, and the heat-sealed vacuum bags are classified according to different fish species through the sorting and identifying component;

[0014] The vacuum pumping component includes a vacuum box and a vacuum regulating valve, the vacuum regulating valve is arranged at the rear side of the vacuum box, a vacuum chamber is arranged in the vacuum box, the vacuum regulating valve includes a valve body, a vent hole is arranged at the top of the valve body, an opening is arranged at the bottom of the valve body to communicate with the vacuum chamber, a sealing plate is arranged in the valve body, and a sealing component is arranged below the sealing plate, the sealing component is used to connect the upper and lower sides of the sealing plate after the pressure difference between the upper and lower sides of the sealing plate reaches a set value;

[0015] A valve pressure plate is provided above the sealing plate, and a rotating shaft, a sleeve, a piston and a return spring are provided between the sealing plate and the valve pressure plate. The piston is provided at the bottom of the valve pressure plate, and the return spring is provided at the bottom of the piston. The top end of the rotating shaft passes through the piston, the valve pressure plate and the valve body, the sleeve is sleeved on the outside of the rotating shaft, and the valve pressure plate is sleeved on the outside of the sleeve.

[0016] Further: the opening component includes an opening plate, an opening rod and an opening spring, the bottom end of the opening rod is connected to the opening plate, the top end of the opening rod passes through the sealing plate and is provided with an expansion head, and the opening spring is sleeved on the opening rod and arranged between the sealing plate and the expansion head.

[0017] Further: the vacuum box includes a box body, a cover body and an opening component, the opening component includes a support, a swing arm and a pull rod, the support is arranged on the top of the cover body, the top of the cover body extends upward and backward to form an extension arm, the extension arm is hinged to the support, the extension arm extends to the rear side of the support and is rotatably connected to the top end of the pull rod, the bottom end of the pull rod is rotatably connected to one end of the swing arm, and the other end of the swing arm is rotatably connected to the rear side of the box body.

[0018] Further: it also includes a heat sealing component, the heat sealing component includes an upper heat sealing component and a lower heat sealing component, the upper heat sealing component is arranged on the cover body, and the lower heat sealing component is arranged on the box body.

[0019] Furthermore: clamping components are provided on both sides of the vacuum chamber, and the clamping components include a fixed block, a pressure block and a driving rod. The pressure block is fixed in the vacuum box, the top end of the driving rod is connected to one end of the pressure block, and the bottom end of the driving rod passes through the vacuum box. The pressure block is fitted with the fixed block through the rotation of the driving rod.

[0020] Furthermore: a synchronous driving component is provided at the bottom of the vacuum box, and the synchronous driving component includes a first swinging piece, a second swinging piece and a connecting piece. The first swinging piece and the second swinging piece are respectively provided at the bottom ends of the two driving rods, and the two ends of the connecting piece are respectively connected to the first swinging piece and the second swinging piece, and the corresponding ends of the connecting piece are at the same distance from the two driving rods.

[0021] Further: the sorting and identification component includes an identification component and a sorting component, the identification component is used to distinguish two different fish after packaging, and the sorting component is used to transport the packaged fish and modify the transport direction of one of the fish.

[0022] Furthermore: the sorting component includes a frame, a plurality of conveying rollers, a sorting plate and a lifting cylinder. The conveying rollers are installed on the frame at intervals. The sorting plate is U-shaped. The lifting cylinder is arranged at the bottom of the sorting plate. The lifting cylinder drives the sorting plate to move upward so that the top of the sorting plate protrudes along the intervals between the conveying rollers.

[0023] Furthermore: a clamping portion is provided at the bottom of the rotating shaft, and the diameter of the clamping portion is larger than the diameter of the rest of the rotating shaft.

[0024] Furthermore: an inner ring spring is provided between the piston and the sealing plate, and the diameter of the inner ring spring is smaller than that of the return spring.

[0025] By adopting the above technical solution, the beneficial effects of the present invention are:

[0026] 1. The fish slaughtering and processing method of the present invention adopts bag packaging equipment in bag packaging, connects a vacuum regulating valve through a vacuum box, and when different kinds of fish are replaced for vacuum packaging, the height of the valve pressure plate in the valve body is adjusted by the rotating shaft of the vacuum regulating valve, and the starting pressure difference of the downward movement of the piston is adjusted, so that different kinds of fish can be vacuum packaged on one production line, thereby improving production efficiency and reducing production costs.

[0027] 2. Through the arrangement of the sleeve, the piston and the return spring, the present invention can utilize the movement of the piston to adjust when air pressure fluctuations occur during the vacuuming process, and automatically maintain stability during the vacuum packaging process. When the pressure difference generated by the pressure difference between the upper and lower sides of the piston exceeds the elastic force when the spring is compressed to the height of the bottom end of the sleeve at that time, the piston moves to the rotating shaft area with a smaller diameter under the action of the pressure difference, so that the air above and below the valve pressure plate is connected, thereby protecting the equipment, reducing the failure rate of the equipment, and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of a vacuum regulating valve according to an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the cross-sectional structure of a vacuum regulating valve according to an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of a vacuum box according to a first embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of the cover opening component in the first embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of a heat sealing component in accordance with a first embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the structure of a turntable according to a first embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the cross-sectional structure of a sorting component in accordance with the first embodiment of the present invention;

[0036] Fig. 9 This is a schematic diagram of the structure of a vacuum regulating valve according to Embodiment 2 of the present invention.

[0037] Description of Figure Numbers

[0038] Vacuuming component 1; vacuum pump 11; turntable 12;

[0039] Sorting and identifying component 2; identifying component 21; sorting component 22; frame 23; conveying roller 24; sorting plate 25; lifting cylinder 26;

[0040] Vacuum box 3; vacuum chamber 31; box body 32; cover body 33; cover opening member 34; support 35; swing arm 36; pull rod 37; extension arm 38;

[0041] Vacuum regulating valve 4; valve body 41; vent hole 42; sealing plate 43; valve pressure plate 44; rotating shaft 45; sleeve 46; piston 47; return spring 48; clamping portion 49;

[0042] The opening component 5; the opening plate 51; the opening rod 52; the opening spring 53; the expansion head 54;

[0043] Heat sealing component 6; upper heat sealing member 61; lower heat sealing member 62;

[0044] Clamping component 7; fixing block 71; pressing block 72; driving rod 73;

[0045] Synchronous driving component 8; first swing piece 81; second swing piece 82; connecting piece 83;

[0046] Inner spring 9. DETAILED DESCRIPTION

[0047] Embodiment 1

[0048] refer to Figures 1 to 8 , a fish slaughtering and processing method, comprising the following preparation process:

[0049] (1) Bleeding and rinsing live fish or frozen fish;

[0050] (2) The fish are transported to the finning area via a conveyor belt for finning;

[0051] (3) sending to the descaling and back opening device for descaling and back opening;

[0052] (4) Rinse in the bubble pool, remove the internal organs and gills, and wash;

[0053] (5) Dividing, weighing, pickling, bagging, coding, boxing, palletizing, and sending to cold storage;

[0054] Wherein, the bagging and packaging adopts bagging and packaging equipment, and the bagging and packaging equipment comprises:

[0055] A vacuum pumping component 1 is used to extract air from vacuum bags containing different fish and heat-seal the vacuum bags; a sorting and identifying component 2 is arranged below the vacuum pumping component 1, and the heat-sealed vacuum bags are classified according to different fish through the sorting and identifying component 2;

[0056] The vacuum pumping component 1 includes a vacuum box 3 and a vacuum regulating valve 4, the vacuum box 3 is connected to the vacuum pump 11, the vacuum regulating valve 4 is arranged at the rear side of the vacuum box 3, a vacuum chamber 31 is arranged in the vacuum box 3, the vacuum regulating valve 4 includes a valve body 41, a vent hole 42 is arranged on the top of the valve body 41, an opening is arranged at the bottom of the valve body 4 to communicate with the vacuum chamber 31, a sealing plate 43 is arranged in the valve body 41, and a sealing component 5 is arranged below the sealing plate 43, and the sealing component 5 is used to connect the upper and lower sides of the sealing plate 43 after the pressure difference between the upper and lower sides of the sealing plate 43 reaches a set value;

[0057] The valve body 41 is divided into two parts, an upper part and an lower part, which are connected by threads. The sealing plate 43 is arranged at the connection. To ensure air tightness, a rubber ring is arranged at the bottom of the sealing plate 43.

[0058] A valve pressure plate 44 is provided above the sealing plate 43, and a rotating shaft 45, a sleeve 46, a piston 47 and a return spring 48 are provided between the sealing plate 43 and the valve pressure plate 44. The piston 47 is provided at the bottom of the valve pressure plate 44, and the return spring 48 is provided at the bottom of the piston 47. The top end of the rotating shaft 45 passes through the piston 47, the valve pressure plate 44 and the valve body 41, and the sleeve 46 is sleeved on the outside of the rotating shaft 45, and the valve pressure plate 44 is sleeved on the outside of the sleeve 46;

[0059] The bottom end of the sleeve 46 is at a certain distance from the bottom of the valve pressure plate 44, which is used for the up and down movement of the piston 47 to balance the pressure when the air pressure fluctuates and maintain the stability of the equipment. The outer side of the rotating shaft 45 and the inner side of the sleeve 46 are provided with corresponding matching threads, and the sleeve 46 and the valve pressure plate 44 are fixedly connected;

[0060] The vacuuming time of existing food is 10-60s. A vacuum gauge is used to detect the vacuum degree. When the set vacuum degree is reached, the extraction is automatically closed. The set vacuum degree is close to the limit of the vacuum pump 11. In order to ensure the quality of vacuum packaging and avoid a small amount of gas backflow, an additional extraction time of 3-5s is required after the set vacuum degree is reached. The load of the vacuum pump 11 is too high. When the vacuum pump 11 uses an ordinary rotary vane pump for continuous operation, the service life is short and it is easy to be damaged;

[0061] After the vacuum regulating valve 4 is added in the present application, when the vacuum degree in the vacuum chamber 31 is about to reach the set value, the pressure difference generated by the pressure difference on the upper and lower sides of the piston 47 exceeds the elastic force of the return spring 48, and the piston 47 moves downward to compress the return spring 48. When the vacuum degree in the vacuum chamber 31 reaches the set value, the vacuum pump 11 continues to extract, and the pressure difference generated by the pressure difference on the upper and lower sides of the piston 47 exceeds the elastic force of the return spring 48, and the piston 47 continues to move downward until the vacuum pump 11 stops extracting;

[0062] The present application adopts a fixed extraction time of the vacuum pump 11. When different fish are packaged on the same production line, taking Spanish mackerel and tilapia as examples, more air is extracted when Spanish mackerel is packaged. It is assumed that the vacuum pump 11 extracts for 10 seconds to reach the set vacuum degree when Spanish mackerel is packaged, and the vacuum pump 11 continues to extract for 3 seconds. When the vacuum pump 11 continues to extract for 3 seconds, the volume in the valve body is reduced by the downward movement of the piston 47 to maintain the pressure in the vacuum chamber 31, thereby reducing the load of the vacuum pump 11; when tilapia is packaged, less air is extracted. It is assumed that the vacuum pump 11 extracts for 8 seconds to reach the set vacuum degree when tilapia is packaged. After the vacuum degree in the vacuum chamber 31 reaches the set value, the vacuum pump 11 continues to extract for 5 seconds. Although the vacuum pump 11 extracts two seconds more than when packaging Spanish mackerel after the vacuum degree in the vacuum chamber 31 reaches the set value, the volume below the piston 47 is reduced under the downward movement of the piston 47, and the volume in the valve 41 can also be reduced to maintain the pressure in the vacuum chamber 31. At this time, the piston 47 has not yet moved to the region of the rotating shaft 45 with a smaller diameter. Therefore, the assembly line can simultaneously process the vacuum packaging of Spanish mackerel and the packaging of tilapia mixed therein. Since the vacuum packaging time is consistent, the continuity of production will not be affected.

[0063] like Figure 7 As shown, the explanation of production continuity is as follows: the vacuum pumping component 1 is fixed on a turntable 12, and the turntable 12 rotates at a set time interval to move the vacuum pumping component 1 that has completed vacuum packaging to the sorting and identification component 2;

[0064] During the equipment debugging stage, the time for evacuating the vacuum chamber 31 is set according to the product type. During the debugging stage, if the time is set too long, the piston 47 will move to the area of ​​the rotating shaft 45 with a smaller diameter, so that the air on the upper and lower sides of the valve pressure plate 44 is connected, thereby avoiding damage to the equipment due to excessive load;

[0065] According to different fish, the height of the valve pressure plate 44 can be adjusted by rotating the shaft 45 to adjust the starting pressure difference of the piston 47 moving downward. When the vacuum setting value is low, the valve pressure plate 44 is adjusted to a higher position to make the starting pressure difference of the piston 47 moving downward smaller, ensuring that the piston 47 has a sufficient downward distance within the set extraction time of the vacuum pump, thereby reducing the equipment load;

[0066] The sealing component 5 comprises a sealing plate 51, a sealing rod 52 and a sealing spring 53. The bottom end of the sealing rod 52 is connected to the sealing plate 51. The top end of the sealing rod 52 passes through the sealing plate 43 and is provided with an expansion head 54. The sealing spring 53 is sleeved on the sealing rod 52 and arranged between the sealing plate 43 and the expansion head 54. When the sealing component 5 is not used, under the action of the sealing spring 53, the top of the sealing plate 51 fits with the bottom of the sealing plate 43 to maintain the airtightness above the sealing plate 43. After the equipment is started, the sealing plate 51 moves downward under the action of the air pressure difference, and the upper and lower sides of the sealing plate 43 are connected through the gap around the sealing rod 52.

[0067] The vacuum box 3 includes a box body 32, a cover body 33 and a cover opening component 34, and the cover opening component 34 includes a support 35, a swing arm 36 and a pull rod 37. The support 35 is arranged on the top of the cover body 33, and the top of the cover body 33 extends upward and backward to form an extension arm 38, and the extension arm 38 is hinged to the support 35. The extension arm 38 extends to the rear side of the support and is rotatably connected to the top end of the pull rod 37. The bottom end of the pull rod 37 is rotatably connected to one end of the swing arm 36, and the other end of the swing arm 36 is rotatably connected to the rear side of the box body 32;

[0068] The cover opening member 34 is used to maintain the sealing of the vacuum chamber 31, and an external driving device, such as a rotary motor or a servo motor, drives the swing arm 36 to connect one end of the box body 32 to achieve the function of opening and closing the vacuum box 3;

[0069] The heat sealing component 6 further comprises an upper heat sealing component 61 and a lower heat sealing component 62. The upper heat sealing component 61 is arranged on the cover body 33, and the lower heat sealing component 62 is arranged on the box body 32. When the vacuum chamber 31 reaches a set vacuum degree, the heat sealing component 6 starts to heat-seal the packaging bag. The heat sealing component 6 adopts a heating plate.

[0070] Clamping components 7 are provided on both sides of the vacuum chamber 31, and the clamping components 7 include a fixed block 71, a pressure block 72 and a driving rod 73. The pressure block 72 is fixed in the vacuum box 3, and the top of the driving rod 73 is connected to one end of the pressure block 72, and the bottom of the driving rod 73 passes through the vacuum box 3. The pressure block 72 is fitted with the fixed block 71 through the rotation of the driving rod 73; the heat sealing component 6 is arranged above the fixed block 71, and the clamping component 7 is used to clamp the opening of the packaging bag. In order to prevent the opening from being completely closed by clamping, the two fixed blocks 71 are arranged at intervals;

[0071] The bottom of the vacuum box 3 is provided with a synchronous driving component 8, and the synchronous driving component 8 includes a first swinging piece 81, a second swinging piece 82 and a connecting piece 83. The bottom ends of the two driving rods 73 are respectively provided with a first swinging piece 81 and a second swinging piece 82, and the two ends of the connecting piece 83 are respectively connected to the first swinging piece 81 and the second swinging piece 82, and the corresponding ends of the connecting piece 83 are at the same distance from the two driving rods 73; the first swinging piece 81 is driven to rotate by the synchronous driving component 8, and when the driving rod 73 connected thereto is driven to rotate, the second swinging piece 82 is driven to rotate under the action of the connecting piece 83, and then the other driving rod 73 is driven to rotate, so that the two driving rods 73 rotate synchronously, because the corresponding ends of the connecting piece 83 are at the same distance from the two driving rods 73, and the rotation speeds of the two driving rods 73 are the same, which can ensure that the two pressing blocks 72 are in contact with their corresponding fixed blocks 71 at the same time, thereby ensuring stable clamping of the packaging bag;

[0072] The sorting and identifying component 2 includes an identifying component 21 and a sorting component 22. The identifying component 21 is used to distinguish between two different types of fish after packaging, and the sorting component 22 is used to transport the packaged fish and modify the transport direction of one of the fish. The identifying component 21 uses infrared recognition technology to distinguish the size of the fish and transmit the control signal to the sorting component 22 to achieve sorting. This is a prior art. The identifying component can use an infrared sensor, which can be purchased on the market and will not be described in detail here.

[0073] The sorting component 22 includes a frame 23, a plurality of conveying rollers 24, a sorting plate 25 and a lifting cylinder 26. The conveying rollers 24 are arranged on the frame 23 at intervals. The sorting plate 25 is U-shaped. The lifting cylinder 26 is arranged at the bottom of the sorting plate 25. The lifting cylinder 26 drives the sorting plate 25 to move upward so that the top of the sorting plate 25 protrudes along the interval between the conveying rollers 24. The top of the sorting plate 25 is inclined. When the recognition component 21 detects a large object, a control signal is sent to start the lifting cylinder 26 to modify the conveying direction of the large object and realize sorting.

[0074] The present application does not specifically limit the number of conveying rollers 24, and it can be adjusted according to actual conditions;

[0075] A clamping portion 49 is provided at the bottom of the rotating shaft 45. The diameter of the clamping portion 49 is larger than the diameter of the rest of the rotating shaft 45, and the diameter of the clamping portion 49 is smaller than the diameter of the sleeve 46. The clamping portion 49 is used to limit the lowest downward position of the sleeve 46, and at the same time ensure that when the piston 47 runs to the clamping portion 49, the air on the upper and lower sides of the piston 47 can be connected.

[0076] Embodiment 2

[0077] refer to Fig. 9 , a method for slaughtering fish, which is different from the first embodiment in that an inner ring spring 9 is provided between the piston 47 and the sealing plate 43, the inner ring spring 9 has a smaller diameter than the return spring 48, and the inner ring spring 9 has the same elastic coefficient as the return spring 48, so as to ensure that the piston 47 will not be deformed when moving up and down. Other technical solutions are the same as those of the first embodiment.

[0078] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A fish slaughtering and processing method, characterized in that: The preparation process includes the following: (1) Bleeding and rinsing live fish or frozen fish; (2) The fish are transported to the finning area via a conveyor belt for finning; (3) sending to the descaling and back opening device for descaling and back opening; (4) Rinse in the bubble pool, remove the internal organs and gills, and wash; (5) Dividing, weighing, pickling, bagging, coding, boxing, palletizing, and sending to cold storage; Wherein, the bagging and packaging adopts bagging and packaging equipment, and the bagging and packaging equipment comprises: A vacuuming component, used to extract air from vacuum bags containing different fish and heat-seal the vacuum bags; A sorting and identifying component, which is arranged below the vacuuming component, and the heat-sealed vacuum bags are classified according to different fish species through the sorting and identifying component; The vacuum pumping component includes a vacuum box and a vacuum regulating valve, the vacuum regulating valve is arranged at the rear side of the vacuum box, a vacuum chamber is arranged in the vacuum box, the vacuum regulating valve includes a valve body, a vent hole is arranged at the top of the valve body, an opening is arranged at the bottom of the valve body to communicate with the vacuum chamber, a sealing plate is arranged in the valve body, and a sealing component is arranged below the sealing plate, the sealing component is used to connect the upper and lower sides of the sealing plate after the pressure difference between the upper and lower sides of the sealing plate reaches a set value; A valve pressure plate is provided above the sealing plate, and a rotating shaft, a sleeve, a piston and a return spring are provided between the sealing plate and the valve pressure plate. The piston is provided at the bottom of the valve pressure plate, and the return spring is provided at the bottom of the piston. The top end of the rotating shaft passes through the piston, the valve pressure plate and the valve body, the sleeve is sleeved on the outside of the rotating shaft, and the valve pressure plate is sleeved on the outside of the sleeve.

2. A fish slaughtering and processing method according to claim 1, characterized in that: The opening component includes an opening plate, an opening rod and an opening spring. The bottom end of the opening rod is connected to the opening plate, the top end of the opening rod passes through the sealing plate and is provided with an expansion head, and the opening spring is sleeved on the opening rod and arranged between the sealing plate and the expansion head.

3. A fish slaughtering and processing method according to claim 1, characterized in that: The vacuum box includes a box body, a cover body and an opening component, the opening component includes a support, a swing arm and a pull rod, the support is arranged on the top of the cover body, the top of the cover body extends upward and backward to form an extension arm, the extension arm is hinged to the support, the extension arm extends to the rear side of the support and is rotatably connected to the top end of the pull rod, the bottom end of the pull rod is rotatably connected to one end of the swing arm, and the other end of the swing arm is rotatably connected to the rear side of the box body.

4. A fish slaughtering and processing method according to claim 3, characterized in that: It also includes a heat sealing component, which includes an upper heat sealing component and a lower heat sealing component. The upper heat sealing component is arranged on the cover body, and the lower heat sealing component is arranged on the box body.

5. A fish slaughtering and processing method according to claim 1, characterized in that: Clamping components are provided on both sides of the vacuum chamber, and the clamping components include a fixed block, a pressure block and a driving rod. The pressure block is fixed in the vacuum box, the top end of the driving rod is connected to one end of the pressure block, and the bottom end of the driving rod passes through the vacuum box. The pressure block is fitted with the fixed block through the rotation of the driving rod.

6. A fish slaughtering and processing method according to claim 5, characterized in that: A synchronous driving component is provided at the bottom of the vacuum box, and the synchronous driving component includes a first swinging piece, a second swinging piece and a connecting piece. The first swinging piece and the second swinging piece are respectively provided at the bottom ends of the two driving rods, and the two ends of the connecting piece are respectively connected to the first swinging piece and the second swinging piece, and the corresponding ends of the connecting piece are at the same distance from the two driving rods.

7. A fish slaughtering and processing method according to claim 1, characterized in that: The sorting and identifying component comprises an identifying component and a sorting component. The identifying component is used to distinguish two different fish species after packaging. The sorting component is used to transport the packaged fish species and modify the transport direction of one of the fish species.

8. A fish slaughtering and processing method according to claim 7, characterized in that: The sorting component includes a frame, a plurality of conveying rollers, a sorting plate and a lifting cylinder. The conveying rollers are arranged on the frame at intervals. The sorting plate is U-shaped. The lifting cylinder is arranged at the bottom of the sorting plate. The lifting cylinder drives the sorting plate to move upward so that the top of the sorting plate protrudes along the intervals between the conveying rollers.

9. A fish slaughtering and processing method according to claim 1, characterized in that: A clamping portion is provided at the bottom of the rotating shaft, and the diameter of the clamping portion is larger than the diameter of the rest of the rotating shaft.

10. A fish slaughtering and processing method according to claim 1, characterized in that: An inner ring spring is arranged between the piston and the sealing plate, and the inner ring spring has a smaller diameter than the return spring.

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