An intelligent tunnel-type liquid nitrogen quick-freezing device for aquatic products

Abstract

The present invention discloses an intelligent tunnel - type liquid nitrogen quick - freezing device for aquatic products, which includes a freezing chamber, a conveyor belt. There is also a liquid nitrogen delivery pipe at the top of the freezing chamber. A stretching base is fixed on the top of the base, and the stretching base covers above the conveyor belt. An accommodation cavity is arranged directly above the conveyor belt inside the stretching base. A feeding port is arranged on one side of the stretching base far away from the freezing chamber. A blower is arranged at the top end of the stretching base at the feeding port. The blower is connected to the feeding port of the accommodation cavity through a connecting pipe. It should be noted that: the outer end of the blower can pump nitrogen to an external nitrogen collection place through the connecting pipe. A feeding mechanism for sliding the aquatic product tray into the accommodation cavity is slidably arranged at the feeding port. A transfer mechanism for moving the aquatic product tray to the conveyor belt is arranged inside the accommodation cavity. By setting the conveying plate and the tray - blocking plate that assists the conveying plate to slide the tray onto the conveyor belt, the present invention can prevent workers from directly arranging trays on the conveyor belt and working in a nitrogen environment for a long time, which is beneficial to physical health and safety.

Description

Technical Field

[0001] The present invention relates to the technical field of food freezing, and particularly to an intelligent tunnel-type liquid nitrogen quick-freezing device applied to aquatic products. Background Art

[0002] Seafood, also known as marine food, refers to the dishes made from marine animals, including these marine products such as fish, shrimps, and shellfish. Narrowly speaking, only fresh marine food can be called seafood, and the classification of seafood includes: live seafood and frozen seafood.

[0003] Liquid nitrogen, the liquid state of nitrogen, is inert, colorless, odorless, non-corrosive, non-flammable, and has an extremely low temperature. Under normal pressure, the temperature of liquid nitrogen is -196°C, and 1 cubic meter of liquid nitrogen can expand to 696 cubic meters of pure gaseous nitrogen at 21°C. The boiling point of nitrogen is -196°C. If the temperature is below this under normal atmospheric pressure, liquid nitrogen will be formed. If pressurized, liquid nitrogen can be obtained at a higher temperature.

[0004] In the storage or transportation and preservation of seafood food, it is necessary to freeze the seafood to be stored or transported and preserved to ensure the quality of the seafood products. There is currently a quick-freezing tunnel machine as shown in Figure 1 which includes a freezing chamber. There are a feeding end and a discharging end at the front and back of the freezing chamber. There is a base at the feeding end of the freezing chamber, and a conveyor belt in the form of a mesh belt structure is arranged above the base. There is a liquid nitrogen delivery pipe at the top of the freezing chamber. After the conveyor belt transports the framed trays filled with seafood into the freezing chamber, liquid nitrogen is input into the freezing chamber through the liquid nitrogen delivery pipe and converted into nitrogen to quickly freeze the seafood on the conveyor belt; its freezing efficiency is high, the freezing effect is good, and at the same time, it can ensure that the water loss of the frozen seafood is small.

[0005] The above existing solution has the following problems: When freezing seafood, workers need to arrange the trays filled with seafood on the conveyor belt at the feeding end of the freezing chamber for a long time. Since nitrogen will continuously be discharged from the feeding end during the operation in the freezing chamber, it will cause the workers to be frozen and affect their physical health, and workers working in an environment with too high a nitrogen content for a long time will be at risk of hypoxia. Summary of the Invention

[0006] The purpose of the present invention is to provide an intelligent tunnel-type liquid nitrogen quick-freezing device applied to aquatic products to solve the above technical problems.

[0007] To achieve the above object, the present invention provides the following technical solution: An intelligent tunnel-type liquid nitrogen quick-freezing device for aquatic products, including a freezing chamber, one end of the freezing chamber is provided with a feeding end, a base is provided on one side of the feeding end, a conveyor belt is provided on the base, and a liquid nitrogen delivery pipe is further provided on the top of the freezing chamber. An extension seat is fixed on the top of the base, the extension seat covers above the conveyor belt, a receiving cavity is provided in the extension seat directly above the conveyor belt, a feeding port is provided on the side of the extension seat away from the freezing chamber, a blower is provided at the top end of the extension seat at the feeding port, a feeding mechanism for sending the aquatic product tray into the receiving cavity is slidably provided at the feeding port, and a transfer mechanism for moving the aquatic product tray onto the conveyor belt is provided in the receiving cavity; the feeding mechanism includes a conveying plate slidably provided at the feeding port, and the transfer mechanism includes a blocking plate slidably arranged up and down in the receiving cavity, a driving rod rotatably arranged on the blocking plate, and a sliding assembly connected to one end of the driving rod. The blocking plate is arranged on the side of the receiving cavity away from the freezing chamber, a rod groove is formed in the middle of the blocking plate, rotating holes are symmetrically arranged on the inner walls of both sides of the rod groove, one end in the length direction of the driving rod is connected to the sliding assembly, short rods that are snapped into the rotating holes are arranged on the outer walls of both sides of the head of the driving rod away from the sliding assembly, the side of the driving rod away from the sliding assembly penetrates through the rod groove and extends outwards, and an extending groove for the driving rod to extend out is formed on the outer wall of the side of the extension seat away from the freezing chamber. The sliding assembly includes sliding rods slidably arranged back and forth on the top of the receiving cavity, the sliding rods are symmetrically arranged on both sides of the receiving cavity, the sliding assembly further includes a connecting rod connected between the two sliding rods, the connecting rod penetrates through the driving rod and is rotatably connected to the driving rod. The feeding mechanism further includes a push plate for pushing the end of the driving rod extending outside the rod groove, the push plate is arranged at the end of the conveying plate away from the freezing chamber, and a return assembly for driving the blocking plate to slide upwards is provided in the receiving cavity.

[0008] Preferably, the return assembly includes a return plate slidably arranged up and down in the receiving cavity and a long rod rotatably arranged on the return plate. The return plates are symmetrically arranged on both sides of the blocking plate. One end of the long rod is connected to the return plate, and the other end of the long rod is rotatably connected to the sliding rod. A slope is provided on the side of the bottom end of the return plate close to the freezing chamber. Guard plates are symmetrically arranged on both sides of the conveying plate, and a resisting block is provided at the end of the top of the guard plate close to the freezing chamber. A resisting slope that abuts against the slope is provided on the side of the resisting block away from the freezing chamber.

[0009] Preferably, a power block is provided on the side of the blocking plate away from the freezing chamber, the power blocks are symmetrically arranged on both sides of the rod groove, and a block groove for the power block to slide up and down is formed on the inner wall of the side of the receiving cavity away from the freezing chamber. The return assembly further includes a spring provided on the inner wall of the bottom of the block groove.

[0010] Preferably, a roller shaft is rotatably arranged between the two guard plates, and a plurality of roller shafts are evenly arranged along the length direction of the guard plates.

[0011] Preferably, chutes are formed on the inner walls on both sides of the feeding port, and the chutes extend through the inner walls on both sides of the accommodating cavity. Side rails which are slidably connected with the chutes are arranged on the outer wall of the guard plate.

[0012] Preferably, a limiting block is arranged at one end of the side rail close to the freezer compartment, and a side groove for the limiting block to slide up and down is formed on the side rail. A limiting groove for the limiting block to be clamped into is arranged on the inner wall at the bottom of the feeding port. A second inclined surface is arranged on the end face of the limiting block close to the freezer compartment. Anti-detachment blocks are symmetrically arranged on both sides of the limiting block. Anti-detachment grooves for the anti-detachment blocks to slide up and down are formed on the inner walls on both sides of the side groove. A second spring for driving the limiting block to be clamped into the limiting groove is further arranged at the bottom of the side groove.

[0013] Preferably, a baffle is arranged at one end of the conveying plate close to the freezer compartment. The two sides of the bottom of the baffle extend to the inside of the guard plate. Baffle grooves for the baffle to slide up and down are formed on the side of the two guard plates close to each other. A third spring which abuts against the baffle is arranged on the inner wall at the top of the baffle groove. A driving groove is formed in the conveying plate. A driving plate is slidably arranged in the driving groove. A third inclined surface is arranged on the side of the bottom of the baffle far from the freezer compartment. A second abutting inclined surface which abuts against the third inclined surface is arranged on the side of the driving plate close to the freezer compartment. Driving side plates are symmetrically arranged on both sides of the driving plate. Driving side grooves for the driving side plates to slide are arranged on both sides of the driving groove. A fourth spring is fixed on the inner wall at the side of the driving side groove close to the freezer compartment.

[0014] Preferably, a blocking plate groove for the blocking plate to slide up and down is formed on the side of the accommodating cavity far from the freezer compartment.

[0015] Preferably, a recovery groove is arranged on the side of the accommodating cavity far from the freezer compartment, and the recovery groove is symmetrically arranged on both sides of the blocking plate groove.

[0016] Preferably, sliding grooves for the sliding rods to slide back and forth are formed on the inner walls on both sides at the top of the accommodating cavity, and a moving area for the long rods to move is further arranged at the bottom of the accommodating cavity where the sliding grooves are located.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] An extension seat covering above the conveyor belt is fixedly arranged on the top of the base. An accommodation cavity and a feeding port are arranged in the extension seat. A conveying plate is slidably arranged at the feeding port. Workers can slide out the conveying plate to arrange pallets on it and then push the conveying plate into the accommodation cavity, avoiding continuous contact between the workers and the nitrogen leaking out to the conveyor belt at the feeding end. And a blower is arranged at the top of the feeding port to extract the nitrogen about to be discharged from the feeding port, preventing the nitrogen in the freezer from being extracted before fully exchanging heat with the product and increasing the nitrogen consumption. A blocking plate is slidably arranged up and down in the accommodation cavity. A driving rod is rotatably arranged on the blocking plate. A pushing plate abutted against the driving rod is arranged on the conveying plate. And the other end of the driving rod abutted against the pushing plate is connected to a sliding assembly. After the conveying plate pushes the pallet into the accommodation cavity and abuts against the driving rod, the driving rod is connected to the driving rod through a short rod and can drive the blocking plate to slide down. Thus, after the conveying plate is pulled out, the blocking plate can abut against the pallet, enabling the arranged pallet to move from the conveying plate to the conveyor belt. A roller shaft is rotatably arranged between the side guard plates of the conveying plate, enabling the pallet loaded with seafood to slide onto the conveyor belt more smoothly. A return plate is slidably arranged up and down on both sides of the blocking plate in the accommodation cavity. The return plate is rotatably connected to a sliding rod through a long rod. And a abutting block abutting against the return plate is arranged at the top of the guard plate, which can drive the sliding rod to slide towards the side close to the freezer after the conveying plate slides out of the accommodation cavity, enabling the sliding rod to pull the driving rod through a connecting rod and making the blocking plate slide up, so that the conveying plate will not be blocked by the blocking plate when pushing the pallet into the accommodation cavity next time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 is a schematic illustration showing the prior art highlighted in this embodiment;

[0021] Figure 2 is a schematic illustration of the whole of this embodiment;

[0022] Figure 3 is a schematic illustration showing the structure of the extension seat and the feeding plate highlighted in this embodiment;

[0023] Figure 4 is a schematic illustration showing the internal structure of the accommodation cavity of the figure in this embodiment;

[0024] Figure 5 is a schematic illustration showing the structure of the feeding plate and the blocking plate highlighted in this embodiment.

[0025] Figure 6 is a schematic illustration showing the structure of the blocking plate overlapping in the rod groove in this embodiment;

[0026] Figure 7 is a schematic structural view of the pushing short rod in this embodiment;

[0027] Figure 8 is a schematic cross-sectional view highlighting the power block and the block slot in this embodiment;

[0028] Figure 9 is a schematic cross-sectional view highlighting the baffle in this embodiment;

[0029] Figure 10 is a schematic cross-sectional view highlighting the anti-detachment slot in this embodiment.

[0030] Figure 11 is a schematic cross-sectional view highlighting the drive plate in this embodiment;

[0031] Figure 12 is a schematic cross-sectional view highlighting the drive side plate in this embodiment.

[0032] In the drawings, the list of components represented by each reference numeral is as follows:

[0033] 1, freezer; 2, base; 3, conveyor belt; 4, liquid nitrogen delivery pipe; 5, extension base; 6, accommodation cavity; 7, feeding port; 8, fan; 9, conveying plate; 10, blocking plate; 11, drive rod; 12, rod slot; 13, rotating hole; 14, short rod; 15, protruding slot; 16, sliding rod; 17, connecting rod; 18, pushing plate; 19, return plate; 20, long rod; 21, inclined surface; 22, abutting block; 23, abutting inclined surface; 24, power block; 25, block slot; 26, spring; 27, roller; 28, sliding slot; 29, side rail; 30, limiting block; 31, side slot; 32, limiting slot; 33, second inclined surface; 34, anti-detachment slot; 35, second spring; 36, baffle; 37, baffle slot; 38, third spring; 39, drive slot; 40, drive plate; 41, third inclined surface; 42, drive side plate; 43, drive side slot; 44, fourth spring; 45, blocking plate slot; 46, return slot; 47, sliding slot; 48, moving area; 49, second connecting rod; 50, rotating slot; 51, second rotating slot; 52, guard plate. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Please refer to Figures 1-12 , the present invention provides a technical solution: as Figures 1-4As shown in the figure, an intelligent tunnel - type liquid nitrogen quick - freezing device for aquatic products includes a freezing chamber 1. One end of the freezing chamber 1 is provided with a feeding end. On one side of the feeding end, there is a base 2. A conveyor belt 3 is arranged on the base 2. A liquid nitrogen delivery pipe 4 is also provided at the top of the freezing chamber 1. A extending seat 5 is fixed on the top of the base 2, and the extending seat 5 covers above the conveyor belt 3. An accommodating cavity 6 is arranged directly above the conveyor belt 3 inside the extending seat 5. A feeding port 7 is arranged on the side of the extending seat 5 away from the freezing chamber 1. A blower 8 is arranged at the top end of the extending seat 5 at the feeding port 7. The blower 8 is connected to the accommodating cavity 6 through a connecting pipe (not shown). It should be noted that the outer end of the blower 8 can pump nitrogen to an external nitrogen collection place through the connecting pipe. A feeding mechanism for sending the aquatic product tray into the accommodating cavity 6 is slidably arranged at the feeding port 7, and a transfer mechanism for moving the aquatic product tray onto the conveyor belt 3 is arranged inside the accommodating cavity 6;

[0036] Specifically, as Figure 3 , 4 shown, the feeding mechanism includes a conveying plate 9 slidably arranged at the feeding port 7. Protective plates 52 are symmetrically arranged on both sides of the conveying plate 9. Slide grooves 28 are opened on the inner walls of both sides of the feeding port 7, and the slide grooves 28 extend through the inner walls of both sides of the accommodating cavity 6. Side rails 29 that form a sliding connection with the slide grooves 28 are arranged on the outer walls of the protective plates 52. The conveying plate 9 is stably slidably arranged at the feeding port 7 through the cooperation of the side cabinets and the slide grooves 28.

[0037] Specifically, as Figure 4 , 7 shown, the transfer mechanism includes a blocking plate 10 slidably arranged up and down inside the accommodating cavity 6, a driving rod 11 rotatably arranged on the blocking plate, and a sliding component connected to one end of the driving rod 11. A blocking plate groove 45 for the blocking plate 10 to slide up and down is opened on the side of the accommodating cavity 6 away from the freezing chamber 1. The blocking plate 10 is slidably arranged inside the accommodating cavity 6 through the cooperation with the blocking plate groove 45; A rod groove 12 is opened in the middle of the blocking plate 10. Rotating holes 13 are symmetrically arranged on the inner walls of both sides of the rod groove 12. One end in the length direction of the driving rod 11 is connected to the sliding component. Short rods 14 that are snapped into the rotating holes 13 are arranged on the outer walls of both sides of the driving rod 11 away from the sliding component. The driving rod 11 extends through the rod groove 12 and extends outward on the side away from the sliding component. An extending groove 15 for the driving rod 11 to extend out is opened on the outer side wall of the extending seat 5 away from the freezing chamber 1 (as Figure 3as shown in the figure); the sliding assembly includes a slide bar 16 that slides back and forth on the top of the accommodation cavity 6. The slide bars 16 are symmetrically arranged on both sides of the accommodation cavity 6. Slide grooves 47 for the slide bars 16 to slide back and forth are formed on the inner walls of both sides of the top of the accommodation cavity 6. The sliding assembly further includes a connecting rod 17 connected between the two slide bars 16. The connecting rod 17 penetrates through the driving rod 11 and is rotatably connected to the driving rod 11. The feeding mechanism further includes a push plate 18 for pushing one end of the driving rod 11 extending outside the rod groove 12. The push plate 18 is arranged at one end of the conveying plate 9 away from the freezer 1. It should be noted that: the bottom end of the driving rod 11 extending out of the extending groove 15 is lower than the highest point of the push plate 18. One end of the driving rod 11 located in the accommodation cavity 6 is rotatably connected to the connecting rod 17 between the two slide bars 16, so that the top end of the driving rod 11 located in the accommodation cavity 6 can only move horizontally back and forth following the slide bar 16. One end of the driving rod 11 away from the connecting rod 17 is rotatably connected to the blocking plate 10 through a short shaft, and one end of the driving rod 11 away from the connecting rod 17 extends outside the rod groove 12. After the conveying plate 9 moves the part with the tray to the accommodation cavity 6, the push plate 18 will push the driving rod 11, causing the top end of the driving rod 11 to slide away from the freezer 1, and driving the blocking plate 10 to slide downward through the short rod 14 until one side end face of the push plate 18 fits with the blocking plate 10. At this time, the driving rod 11 coincides with the rod groove 12 and is in the same state as the Figure 6 coincidence state shown in the figure. When the conveying plate 9 is pulled out of the accommodation cavity 6, the blocking plate 10 will block the tray on the conveying plate 9, causing the tray to slide from the conveying plate 9 onto the conveyor belt 3 (refer to Figure 1 ).

[0038] Specifically, as Figure 4 shown, a return assembly for driving the blocking plate 10 to slide upward is provided in the accommodation cavity 6. A return groove 46 is provided on one side of the accommodation cavity 6 away from the freezer 1. The return grooves 46 are symmetrically formed on both sides of the blocking plate groove 45. The return assembly includes a return plate 19 that slides up and down in the return groove 46 and a long rod 20 rotatably arranged on the return plate 19. One end of the long rod 20 is connected to the return plate 19, and the other end of the long rod 20 is rotatably connected to the slide bar 16. A slope 21 is provided on one side of the bottom end of the return plate 19 close to the freezer 1 (refer to Figure 2 ). A blocking block 22 is provided at one end of the top of the guard plate 52 close to the freezer 1. An abutting slope 23 that abuts against the slope 21 is provided on the side of the blocking block 22 away from the freezer 1. A moving area 48 for the long rod 20 to move is further provided at the bottom of the accommodation cavity 6 where the slide groove 47 is located.

[0039] Specifically, as Figure 5 shown, the slide bar 16 is close to the freezer 1 (refer to Figure 2) A rotating groove 50 is provided in the middle of one end of it. A second connecting rod 49 is provided at the end of the sliding rod 16 far from the driving rod 11. The second connecting rod 49 is connected between the two groups of sliding rods 16 and penetrates through the two sliding rods 16 and the two long rods 20. One end of the long rod 20 is located at the rotating groove 50 through the second connecting rod 49 penetrating the sliding rod 16 and is rotatably connected to the sliding rod 16. A second rotating groove 51 for the other end of the long rod 20 to be inserted is provided at the top of the return plate 19. The other end of the long rod 20 is rotatably arranged on the return plate 19 through a pin shaft penetrating the return plate 19 at the second rotating groove 51 and the long rod 20. In this way, when pulling out the conveying plate 9, the abutting block 22 abuts against the inclined surface 21 of the return plate 19 through the abutting inclined surface 23, sliding the connection part between the driving long rod 20 and the sliding rod 16 towards the freezing chamber 1 side, so that the driving rod 11 is separated from the overlapping state with the blocking plate 10, and the top of the driving rod 11 slides along with the sliding rod 16, thereby pulling the blocking plate 10 to slide upwards, so that when the conveying plate 9 sends the tray into the accommodating cavity 6 again, it is not blocked by the blocking plate 10.

[0040] Specifically, as Figure 6 、 8 shown, a power block 24 is provided on the side of the blocking plate 10 far from the freezing chamber 1 (refer to Figure 2 ). The power blocks 24 are symmetrically arranged on both sides of the rod groove 12. A block groove 25 for the power block 24 to slide up and down is provided on the inner wall of the accommodating cavity 6 on the side far from the freezing chamber 1. The return assembly further includes a spring 26 provided on the bottom inner wall of the block groove 25. After the sliding rod 16 slides to separate the driving rod 11 from the overlapping state with the blocking plate 10, the tension of the spring 26 will drive the power block 24 to slide upwards until it fits against the top inner wall of the rod groove 12. At this time, one end of the sliding rod 16 just fits against the inner wall of the end of the sliding groove 47 close to the freezing chamber 1. At this time, the blocking plate 10 is in the open state as Figure 5 shown, and the conveying plate 9 is not blocked by the blocking plate 10 when conveying the tray.

[0041] Specifically, as Figure 5 shown, a roller shaft 27 is rotatably arranged between the two guard plates 52, and a plurality of roller shafts 27 are evenly arranged along the length direction of the guard plates 52. When the blocking plate 10 blocks the tray and the conveying plate 9 continues to slide outwards, the roller shaft 27 can effectively reduce the friction between the tray and the conveying plate 9, making the tray slide onto the conveyor belt 3 more smoothly.

[0042] Specifically, as Figure 9 shown, the side rail 29 is close to the freezing chamber 1 (refer to Figure 2) One end of it is provided with a limit block 30. A side groove 31 for the up and down sliding of the limit block 30 is opened on the side rail 29. A limit groove 32 for the limit block 30 to be inserted into is provided on the bottom inner wall of the feeding port 7. A second inclined surface 33 is provided on the end face of the limit block 30 close to the freezer 1. Anti - detachment blocks are symmetrically provided on both sides of the limit block 30. Anti - detachment grooves 34 for the up and down sliding of the anti - detachment blocks are opened on the inner walls of both sides of the side groove 31. A second spring 35 for driving the limit block 30 to be inserted into the limit groove 32 is further provided at the bottom of the side groove 31. In this way, when the conveying plate 9 is pulled out after conveying the tray, the limit block 30 can prevent the conveying plate 9 from being completely pulled out, which is convenient for continuous use.

[0043] Specifically, as Figure 9 , 10 , 11, 12, one end of the conveying plate 9 close to the freezer 1 (refer to Figure 2 ) is provided with a baffle 36. Both sides of the bottom of the baffle 36 extend to the inside of the guard plates 52 on both sides. A baffle groove 37 for the up and down sliding of the baffle 36 is opened on the side of the two guard plates 52 close to each other. A third spring 38 that abuts against the baffle 36 is provided on the top inner wall of the baffle groove 37. A driving groove 39 is opened in the conveying plate 9. A driving plate 40 is slidably arranged in the driving groove 39. A third inclined surface 41 is provided on the side of the bottom of the baffle 36 far from the freezer 1. A second abutting inclined surface that abuts against the third inclined surface 41 is provided on the side of the driving plate 40 close to the freezer 1. Driving side plates 42 are symmetrically provided on both sides of the driving plate 40. Driving side grooves 43 for the driving side plates 42 to slide are provided on both sides of the driving groove 39. A fourth spring 44 is fixed on the inner wall of the driving side groove 43 close to the freezer 1. It should be noted that: one end of the driving plate 40 far from the freezer 1 extends outside the conveying plate 9. When the conveying plate 9 is pushed into the accommodating cavity 6, the driving plate 40 can be pressed. The driving plate 40 drives the baffle 36 to slide up through the abutment of the second abutting inclined surface and the third inclined surface, so as to protect the tray and prevent the tray from sliding out when the conveying plate 9 has not completely slid into the accommodating cavity 6. The cooperation of the driving side plate 42 and the fourth spring 44. When the conveying plate 9 slides out of the accommodating cavity 6, the driving plate 40 will slide out and be separated from the abutment against the baffle 36, so as to prevent the tray from being abutted by the baffle 36 when it needs to slide onto the conveyor belt 3.

[0044] A specific application example of this embodiment is:

[0045] When the device is in use, slide the conveying plate 9 out of the accommodating cavity 6. The staff evenly arrange the trays containing the products on the conveying plate 9. After arranging the trays, while pressing the driving plate 40 inward and pushing the conveying plate 9 into the accommodating cavity 6, at this time, the second abutting inclined surface of the driving plate 40 abuts against the third inclined surface 41 on the baffle plate 36, driving the baffle plate 36 to move upward, thus preventing the trays from sliding; continue to push the conveying plate 9 until the push plate 18 abuts against the driving rod 11 until the driving rod 11 rotates and coincides with the rod groove 12. At this time, the blocking plate 10 slides down to the lowest point. Release the pressing on the driving plate 40. Due to the tension of the fourth spring 44 on the driving side plate 42, the driving plate 40 is driven to disengage from the abutment against the baffle plate 36. Under the action of the third spring 38, the baffle plate 36 will drive the baffle plate 36 to slide down; pull the conveying plate 9 outward. The conveying plate 9 slides outward. Under the abutment of the blocking plate 10 on the trays, the trays will slide from the roller shafts 27 onto the conveyor belt 3 (the distance between the conveying plate 9 and the conveyor belt 3 is relatively close). Continue to slide the conveying plate 9 outward. The abutting block 22 on the conveying plate 9 will abut against the return plate 19, driving the return plate 19 to slide upward and pushing the long rod 20. The long rod 20 pushes the sliding rod 16 to slide toward the freezing chamber 1 side. The sliding of the sliding rod 16 drives the connecting rod 17 to slide. The connecting rod 17 pulls one end of the driving rod 11 to move. The driving rod 11 drives the blocking plate 10 to slide upward. Under the upward tension of the spring 26 on the power block 24, it will assist the blocking plate 10 to slide up to the highest point, so that the next conveying plate 9 with trays can smoothly enter the accommodating cavity 6.

[0046] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. is the orientation or positional relationship based on the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention.

[0047] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "set", "connected", "fixed", "swiveling connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes may be made therein without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent tunnel - type liquid nitrogen quick - freezing device for aquatic products, comprising a freezing chamber (1). One end of the freezing chamber (1) is provided with a feeding end. A base (2) is provided on one side of the feeding end. A conveyor belt (3) is provided on the base (2). A liquid nitrogen delivery pipe (4) is also provided at the top of the freezing chamber (1), and it is characterized in that: A extension base (5) is fixed on the top of the base (2). The extension base (5) covers above the conveyor belt (3). A receiving cavity (6) is arranged directly above the conveyor belt (3) inside the extension base (5). A feeding port (7) is arranged on one side of the extension base (5) away from the freezer (1). A blower (8) is arranged at the top end of the extension base (5) at the feeding port (7). A feeding mechanism for feeding the aquatic product tray into the receiving cavity (6) is slidably arranged at the feeding port (7). A transfer mechanism for moving the aquatic product tray onto the conveyor belt (3) is arranged inside the receiving cavity (6). The feeding mechanism includes a conveying plate (9) slidably arranged at the feeding port (7). The transfer mechanism includes a blocking plate (10) slidably arranged up and down inside the receiving cavity (6), a driving rod (11) rotatably arranged on the blocking plate, and a sliding assembly connected to one end of the driving rod (11). The blocking plate (10) is arranged on one side of the receiving cavity (6) away from the freezer (1). A rod groove (12) is formed in the middle of the blocking plate (10). Rotating holes (13) are symmetrically arranged on the inner walls of both sides of the rod groove (12). One end in the length direction of the driving rod (11) is connected to the sliding assembly. Short rods (14) that are snapped into the rotating holes (13) are arranged on the outer walls of both sides of the driving rod (11) away from the sliding assembly. The driving rod (11) penetrates through the rod groove (12) and extends outwards on the side away from the sliding assembly. An extending groove (15) for the driving rod (11) to extend out is formed on the outer side wall of the extension base (5) away from the freezer (1). The sliding assembly includes sliding rods (16) slidably arranged back and forth on the top of the receiving cavity (6). The sliding rods (16) are symmetrically arranged on both sides of the receiving cavity (6). The sliding assembly further includes a connecting rod (17) connected between the two sliding rods (16). The connecting rod (17) penetrates through the driving rod (11) and is rotatably connected to the driving rod (11). The feeding mechanism further includes a push plate (18) for pushing the end of the driving rod (11) extending outside the rod groove (12). The push plate (18) is arranged at one end of the conveying plate (9) away from the freezer (1). A restoring assembly for driving the blocking plate (10) to slide upwards is arranged inside the receiving cavity (6). The restoring assembly includes a restoring plate (19) slidably arranged up and down inside the receiving cavity (6), and a long rod (20) rotatably arranged on the restoring plate (19). The restoring plates (19) are symmetrically arranged on both sides of the blocking plate (10). One end of the long rod (20) is connected to the restoring plate (19). The other end of the long rod (20) is rotatably connected to the sliding rod (16). A slope (21) is arranged on one side of the bottom end of the restoring plate (19) close to the freezer (1). Guard plates (52) are symmetrically arranged on both sides of the conveying plate (9). A resisting block (22) is arranged at one end of the top of the guard plate (52) close to the freezer (1). A resisting slope (23) that abuts against the slope (21) is arranged on the side of the resisting block (22) away from the freezer (1).

2. The intelligent tunnel-type liquid nitrogen quick-freezing equipment for aquatic products according to claim 1, characterized in that: On one side of the blocking plate (10) away from the freezer compartment (1), there is a power block (24). The power blocks (24) are symmetrically arranged on both sides of the rod groove (12). On the inner wall of one side of the accommodating cavity (6) away from the freezer compartment (1), there is a block groove (25) for the power block (24) to slide up and down. The return assembly further includes a spring (26) arranged on the bottom inner wall of the block groove (25).

3. An intelligent tunnel-type liquid nitrogen quick-freezing device applied to aquatic products according to claim 1, characterized in that: Between the two guard plates (52), a roller shaft (27) is rotatably arranged. A plurality of roller shafts (27) are evenly arranged along the length direction of the guard plates (52).

4. An intelligent tunnel-type liquid nitrogen quick-freezing device applied to aquatic products according to claim 1, characterized in that: On the inner walls of both sides of the feeding port (7), there are sliding grooves (28). The sliding grooves (28) extend through the inner walls of both sides of the accommodating cavity (6). On the outer wall of the guard plate (52), there is a side rail (29) that forms a sliding connection with the sliding groove (28).

5. An intelligent tunnel-type liquid nitrogen quick-freezing device for aquatic products according to claim 4, characterized in that: At one end of the side rail (29) close to the freezer compartment (1), there is a limit block (30). On the side rail (29), there is a side groove (31) for the limit block (30) to slide up and down. On the bottom inner wall of the feeding port (7), there is a limit groove (32) for the limit block (30) to be inserted into. On one side end face of the limit block (30) close to the freezer compartment (1), there is a second inclined surface (33). On both sides of the limit block (30), there are anti - detachment blocks symmetrically arranged. On the inner walls of both sides of the side groove (31), there are anti - detachment grooves (34) for the anti - detachment blocks to slide up and down. At the bottom of the side groove (31), there is also a second spring (35) for driving the limit block (30) to be inserted into the limit groove (32).

6. An intelligent tunnel-type liquid nitrogen quick-freezing device applied to aquatic products according to claim 1, characterized in that: At one end of the conveying plate (9) close to the freezer compartment (1), there is a baffle plate (36). The two sides at the bottom of the baffle plate (36) extend to the inside of the guard plates (52). On the side of the two guard plates (52) close to each other, there is a baffle plate groove (37) for the baffle plate (36) to slide up and down. On the top inner wall of the baffle plate groove (37), there is a third spring (38) that abuts against the baffle plate (36). Inside the conveying plate (9), there is a driving groove (39). Inside the driving groove (39), there is a driving plate (40) sliding. On the side of the baffle plate (36) bottom away from the freezer compartment (1), there is a third inclined surface (41). On the side of the driving plate (40) close to the freezer compartment (1), there is a second abutting inclined surface that abuts against the third inclined surface (41). On both sides of the driving plate (40), there are driving side plates (42) symmetrically arranged. On both sides of the driving groove (39), there are driving side grooves (43) for the driving side plates (42) to slide. On the inner wall of one side of the driving side groove (43) close to the freezer compartment (1), there is a fourth spring (44) fixed.

7. An intelligent tunnel-type liquid nitrogen quick-freezing device for aquatic products according to claim 1, characterized in that: On one side of the accommodating cavity (6) away from the freezer compartment (1), there is a blocking plate groove (45) for the blocking plate (10) to slide up and down.

8. An intelligent tunnel-type liquid nitrogen quick-freezing device applied to aquatic products according to claim 1, characterized in that: On one side of the accommodating cavity (6) away from the freezer compartment (1), there is a return groove (46). The return grooves (46) are symmetrically arranged on both sides of the blocking plate groove (45).

9. An intelligent tunnel - type liquid nitrogen quick - freezing device for aquatic products according to claim 1, characterized in that: On both inner walls of the top of the accommodation cavity (6), sliding grooves (47) for the front-back sliding of the sliding rod (16) are provided, and a moving area (48) for the movement of the long rod (20) is further provided at the bottom of the accommodation cavity (6) located in the sliding grooves (47).

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