A squid liquid nitrogen quick-freezing machine and a quick-freezing method

Abstract

The present invention provides a squid liquid nitrogen quick-freezing machine and a quick-freezing method, which includes a freezing chamber. The freezing chamber is provided with a conveyor belt assembly. The conveyor belt assembly is equidistantly provided with a number of arc-shaped protrusions. A number of material-turning rod assemblies are installed on the side surface of the sliding plate close to the freezing chamber. In the present invention, the driving motor drives the conveyor belt assembly to move, and the squid is conveyed below the nitrogen gas jetting assembly. At the same time, due to the arc-shaped protrusions provided on the conveyor belt assembly, there is a gap between the squid and the surface of the conveyor belt, and they do not come into close contact. Moreover, during the conveying process, the driving motor can synchronously drive the reciprocating lead screw to rotate, so that the sliding plate and the first gear column can move. And after the squid is conveyed in place, the first gear column is disengaged from the driving gear, so that the squid is no longer conveyed, and thus the squid is stationary below the nitrogen gas jetting assembly for jetting quick-freezing, which increases the contact time between the squid and the nitrogen gas and ensures the quick-freezing effect of the squid.

Description

Technical Field

[0001] The present invention relates to the technical field of squid quick-freezing technology, and specifically relates to a squid liquid nitrogen quick-freezing machine and a quick-freezing method. Background Art

[0002] After processing, squid generally needs to be quickly frozen by a liquid nitrogen quick-freezing machine to ensure the freshness of squid products. When the existing liquid nitrogen quick-freezing machine performs quick-freezing, the product is conveyed to the freezing chamber through a conveyor belt assembly, and then quickly frozen by spraying liquid nitrogen through a liquid nitrogen atomizer above the freezing chamber. However, in this process, since one side surface of the squid product will be in close contact with the conveyor belt during transportation, it results in uneven freezing during quick-freezing. Moreover, during the quick-freezing process, the squid can only remain in a fixed position for quick-freezing all the time, which also leads to the problems of uneven quick-freezing and unsatisfactory effects. Therefore, the present invention researches and develops a squid liquid nitrogen quick-freezing machine and a quick-freezing method to solve the above technical problems. Summary of the Invention

[0003] The purpose of the present invention is to provide a squid liquid nitrogen quick-freezing machine and a quick-freezing method, which can enable different positions of the squid to fully contact with nitrogen and improve the quick-freezing effect of the squid.

[0004] To achieve the above purpose, the technical solution provided by the present invention is as follows:

[0005] A squid liquid nitrogen quick-freezing machine includes a freezing chamber. An inner cavity of the freezing chamber is provided with a conveyor belt assembly. The conveyor belt surface of the conveyor belt assembly is equidistantly provided with a plurality of arc-shaped protrusions, and a turning groove is formed between two adjacent arc-shaped protrusions. Opposite side walls of the freezing chamber are symmetrically fixedly connected with driving boxes. Opposite ends of a conveyor roller at the end of the conveyor belt assembly respectively penetrate through opposite side walls of the freezing chamber and are installed with driven gears. A reciprocating lead screw is rotatably connected between the inner wall of the driving box and the freezing chamber. The two reciprocating lead screws have opposite helix directions and equal pitches. A connecting rod is connected between the two reciprocating lead screws, and the connecting rod passes through between the upper and lower sides of the conveyor belt assembly. A side wall of one of the driving boxes is connected with a driving motor connected to the reciprocating lead screw. An output end of the driving motor is inserted into the inner cavity of the driving box and is installed with a driving gear. A sliding plate is threadedly connected to the outer wall of the reciprocating lead screw. A rotating shaft is rotatably connected to a side surface of the sliding plate. A first gear column is fixedly connected to the outer wall of the rotating shaft, and the first gear column is respectively meshed with the driven gear and the driving gear. A plurality of turning rod assemblies are installed on a side surface of the sliding plate close to the freezing chamber, and each turning rod assembly corresponds to each turning groove. A nitrogen gas jetting assembly is arranged above the inner cavity of the freezing chamber, and the nitrogen gas jetting assembly corresponds to the two driving boxes.

[0006] Preferably, the material turning rod assembly includes a first turning rod rotatably connected to the sliding plate. One side of the first turning rod is connected to a material turning rod through a fixed rod, and one end of the material turning rod passes through the side wall of the freezer. The side wall of the freezer is provided with a first semi-circular groove that cooperates with the material turning rod. One side of the end of the first turning rod is provided with a limit post. The side wall of the freezer is provided with a through hole that cooperates with the first turning rod, and a spiral groove that cooperates with the limit post is provided on the inner wall of the through hole.

[0007] Preferably, baffles are symmetrically arranged on opposite sides of the conveyor belt assembly, and the tops of the baffles are abutted against the top of the inner cavity of the freezer. The baffles are provided with second semi-circular grooves that cooperate with the material turning rods.

[0008] Preferably, the nitrogen gas jetting assembly includes a plurality of jetting shafts installed between opposite side walls of the freezer. Each jetting shaft is communicated with a plurality of jetting heads at the bottom, and the jetting heads are arranged facing the conveyor belt assembly. The side wall of the drive box is communicated with an air inlet pipe connected to an external nitrogen gas tank, and the air inlet pipe is communicated with the jetting shafts.

[0009] Preferably, the air inlet pipe and the jetting shafts are hermetically connected through a rotating flange. The plurality of jetting shafts are connected through a sprocket assembly. A rotating gear is fixedly connected to the outer wall of one jetting shaft. An installation seat is installed on the top of the sliding plate. A second turning rod is rotatably connected through the installation seat. One end of the second turning rod is fixedly connected to a second gear column that meshes with the driving gear. After the first gear column is separated from the driving gear, the second gear column meshes with the driving gear. The other end of the second turning rod is fixedly connected to an incomplete gear column that meshes with the rotating gear, and a plurality of tooth groups are arranged at equal angles on the outer wall of the incomplete gear column.

[0010] Preferably, a torsion spring is sleeved on the outer wall of each jetting shaft. The torsion spring is located between the sprocket of the sprocket assembly and the side wall of the freezer, and both ends of the torsion spring are fixedly connected to the surface of the sprocket of the sprocket assembly and the side wall of the freezer respectively.

[0011] Preferably, partition assemblies for partitioning the interior of the freezer are respectively arranged at opposite ends of the side surfaces of the two sliding plates close to each other;

[0012] Each partition assembly includes a push rod fixedly connected to the side surface of the sliding plate close to each other. One end of each of the two push rods close to each other is inserted into the inner cavity of the freezer and symmetrically connected to a partition. The partition is slidably connected to the top of the inner cavity of the freezer. When the two partitions are abutted against each other, the two partitions are located in a material turning groove.

[0013] Preferably, through grooves that cooperate with the partitions are respectively provided through the two baffles.

[0014] Preferably, the inside of the partition board is a hollow structure. A rubber plate is slidably connected to the lower part of the inner cavity of the partition board. One end of the rubber plate penetrates through the bottom of the partition board. A limiting plate is fixedly connected to the top of the rubber plate. A spring is connected between the limiting plate and the bottom of the inner cavity of the partition board. On the symmetrically arranged side faces of the two partition boards close to each other, sliding blocks are symmetrically slidably connected. On the symmetrically arranged sides of the two sliding blocks away from each other, extrusion rods are connected. The extrusion rods are inserted into the inner cavity of the partition board and connected with extrusion blocks. A positioning seat that cooperates with the extrusion blocks is fixedly connected to the top of the limiting plate. An inclined surface that cooperates with each other is arranged between the positioning seat and the extrusion blocks.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. When the present invention freezes squid, the driving motor can drive the conveyor belt assembly to move to convey the squid below the nitrogen jetting assembly. At the same time, due to the arc-shaped protrusions provided on the conveyor belt assembly, there is a gap between the squid and the surface of the conveyor belt and they do not contact closely, so that nitrogen can fully contact the lower surface of the squid. Moreover, during the conveying process, the driving motor can synchronously drive the reciprocating lead screw to rotate, so that the sliding plate and the first gear column can move, so that the first gear column gradually disengages from the meshing with the driving gear and the driven gear. And after the squid is conveyed in place, the first gear column disengages from the driving gear, so that the squid is no longer conveyed, and thus the squid is stationary below the nitrogen jetting assembly for jetting quick freezing, increasing the contact time between the squid and nitrogen and ensuring the quick freezing effect of the squid.

[0017] 2. During the stationary quick freezing process of the squid, the driving motor continues to drive the sliding plate to slide, pushing the turning rod into the turning groove, and the first rotating rod gradually inserts into the through hole. When the turning rod is about to slide to the middle position of the conveyor belt assembly, the limiting column on the outer wall of the first rotating rod cooperates with the spiral groove on the inner wall of the through hole to make the first rotating rod rotate, so as to drive the turning rod to rotate along the first rotating rod through the fixing rod, so that the squid on this turning groove can be turned over to the adjacent turning groove, thus realizing the movement of the squid during the quick freezing process, enabling different positions of the squid to fully contact with nitrogen, and thus improving the quick freezing effect. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic structural diagram of the quick freezer of the present invention;

[0020] Figure 2 Schematic diagram of the front sectional structure of the quick-freezing machine of the present invention;

[0021] Figure 3 Schematic diagram of the first-angle structure of the driving motor and its connecting components in the quick-freezing machine of the present invention;

[0022] Figure 4 Schematic diagram of the second-angle structure of the driving motor and its connecting components in the quick-freezing machine of the present invention;

[0023] Figure 5 is Figure 3 Schematic diagram of the enlarged structure at position A in

[0024] Figure 6 Schematic diagram of the partial structure of the freezer in the quick-freezing machine of the present invention;

[0025] Figure 7 Schematic diagram of the structure of the conveyor belt assembly in the quick-freezing machine of the present invention;

[0026] Figure 8 Schematic diagram of the structure of the nitrogen gas jetting assembly in the quick-freezing machine of the present invention;

[0027] Figure 9 is Figure 8 Schematic diagram of the enlarged structure at position B in

[0028] Figure 10 Schematic diagram of the structure of the partition plate assembly in the quick-freezing machine of the present invention.

[0029] In the drawings, the list of components represented by each reference numeral is as follows:

[0030] 1, freezer; 101, first semi-circular groove; 102, through hole; 103, spiral groove; 2, conveyor belt assembly; 21, baffle; 22, second semi-circular groove; 23, through slot; 3, arc-shaped protrusion; 31, material turning groove; 4, drive box; 5, driven gear; 6, reciprocating lead screw; 7, connecting rod; 8, driving motor; 9, driving gear; 10, sliding plate; 11, rotating shaft; 12, first gear column; 13, material turning rod assembly; 131, first rotating rod; 132, fixed rod; 133, material turning rod; 134, limiting post; 14, nitrogen gas jetting assembly; 141, jetting shaft; 142, jetting head; 143, intake pipe; 144, sprocket assembly; 145, rotating gear; 146, torsion spring; 15, mounting seat; 151, second rotating rod; 152, second gear column; 153, incomplete gear column; 16, partition plate assembly; 161, push rod; 162, partition plate; 163, rubber plate; 164, limiting plate; 165, spring; 166, sliding block; 167, extrusion rod; 168, extrusion block; 169, positioning seat. Detailed implementation manners

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] As Figure 1-10 shown: Embodiment 1 of the present invention is as follows:

[0033] As Figure 1 、 2 、3, and 4 shown: A squid liquid nitrogen quick-freezing machine includes a freezing chamber 1. Inside the freezing chamber 1, a conveyor belt assembly 2 for conveying squid is provided. A number of arc-shaped protrusions 3 are equidistantly arranged on the conveyor belt surface of the conveyor belt assembly 2, and a turning trough 31 is formed between two adjacent arc-shaped protrusions 3. Driving boxes 4 are symmetrically and fixedly connected to opposite side walls of the freezing chamber 1. Opposite ends of one conveyor roller at the end of the conveyor belt assembly 2 respectively pass through opposite side walls of the freezing chamber 1 and are equipped with driven gears 5. A reciprocating lead screw 6 is rotatably connected between the inner wall of the driving box 4 and the freezing chamber 1. The two reciprocating lead screws 6 have opposite helix directions and equal pitches. A connecting rod 7 is connected between the two reciprocating lead screws 6, and the connecting rod 7 passes through between the upper and lower sides of the conveyor belt assembly 2. A side wall of one driving box 4 is connected with a driving motor 8 connected to the reciprocating lead screw 6. The output end of the driving motor 8 is inserted into the inner cavity of the driving box 4 and is equipped with a driving gear 9. A sliding plate 10 is threadedly connected to the outer wall of the reciprocating lead screw 6. One side surface of the sliding plate 10 is rotatably connected to a rotating shaft 11. A first gear column 12 is fixedly connected to the outer wall of the rotating shaft 11. The first gear column 12 is located between the driven gear 5 and the driving gear 9, and the first gear column 12 is respectively meshed with the driven gear 5 and the driving gear 9. A number of turnable turning rod assemblies 13 are installed on the side surface of the sliding plate 10 close to the freezing chamber 1, and each turning rod assembly 13 is arranged corresponding to each turning trough 31. After the reciprocating lead screw 6 drives the first gear column 12 to disengage from the driving gear 9 and the driven gear 5, each turning rod assembly 13 simultaneously inserts into the corresponding turning trough 31 and turns in the same direction into an adjacent turning trough 31. A nitrogen gas jetting assembly 14 is arranged above the inner cavity of the freezing chamber 1, and the nitrogen gas jetting assembly 14 corresponds to the two driving boxes 4.

[0034] As Figure 3 and 5As shown: In this embodiment, in order to realize the automatic turning of the turning rod assembly, the turning rod assembly 13 includes a first turning rod 131 rotatably connected to the sliding plate 10. One side of the first turning rod 131 is connected to a turning rod 133 through a fixed rod 132. One end of the turning rod 133 passes through the side wall of the freezing chamber 1, and a first semi-circular groove 101 matching the turning rod 133 is formed in the side wall of the freezing chamber 1. A limiting post 134 is arranged on one side of the end of the first turning rod 131. A through hole 102 matching the first turning rod 131 is formed in the side wall of the freezing chamber 1, and a spiral groove 103 matching the limiting post 134 is formed in the inner wall of the through hole 102. The first turning rod and the turning rod can slide synchronously with the sliding of the sliding plate. The turning rod assembly is inserted into the turning groove of the conveyor belt assembly, and the sliding plate gradually approaches the through hole. When the turning rod is about to reach the middle position of the conveyor belt assembly, the limiting post on the side wall of the first turning rod gradually inserts into the through hole, and the first turning rod rotates through the cooperation with the spiral groove. Then, the turning rod is driven by the fixed rod to rotate along the central axis of the first turning rod and is turned into an adjacent turning groove, so as to realize turning the squid material on this turning groove into an adjacent turning groove, realize turning of the squid, and improve the freezing effect of the squid.

[0035] As Figure 8 and 9 shown: In this embodiment, the nitrogen gas jetting assembly 14 includes a plurality of jetting shafts 141 installed between the opposite side walls of the freezing chamber 1. A plurality of jetting heads 142 are communicated with the bottom of each jetting shaft 141, and the jetting heads 142 are arranged facing the conveyor belt assembly 2. A gas inlet pipe 143 communicated with an external nitrogen gas tank is communicated with the side wall of the drive box 4, and the gas inlet pipe 143 is communicated with the jetting shaft 141.

[0036] As Figure 7 shown: In this embodiment, in order to reduce the width of the conveyor belt assembly and ensure that there is still a distance between the turning rod assembly and the conveyor belt assembly when the turning rod assembly is inserted into the freezing chamber, that is, it does not affect the normal conveying of the conveyor belt assembly. Therefore, baffles 21 are symmetrically arranged on the opposite sides of the conveyor belt assembly 2, and the tops of the baffles 21 are abutted against the top of the inner cavity of the freezing chamber 1. A second semi-circular groove 22 matching the turning rod 133 is formed in the baffle 21. By arranging baffles on both sides of the conveyor belt assembly, the squid on the conveyor belt assembly can be blocked by the baffles to prevent falling, so that there can be a distance between the conveyor belt assembly and the inner wall of the freezing chamber, and the initial position of the turning rod assembly can be between the conveyor belt assembly and the inner wall of the freezing chamber, and thus the normal conveying of the conveyor belt assembly will not be affected.

[0037] As Figure 8 and 9As shown: In this embodiment, in order to increase the jet area of the liquid nitrogen jetting assembly and enable the squid to be evenly frozen, the intake pipe 143 and the jet shaft 141 are hermetically connected by a rotating flange. A plurality of jet shafts 141 are connected to each other by a sprocket assembly 144. A rotating gear 145 is fixedly connected to the outer wall of one jet shaft 141. An installation seat 15 is installed on the top of the sliding plate 10. The installation seat 15 is rotatably connected through a second rotating rod 151. One end of the second rotating rod 151 is fixedly connected to a second gear column 152 that meshes with the driving gear 9. After the first gear column 12 is separated from the driving gear 9, the second gear column 152 meshes with the driving gear 9. The other end of the second rotating rod 151 is fixedly connected to an incomplete gear column 153 that meshes with the rotating gear 145. A plurality of tooth groups are arranged at equal angles on the outer wall of the incomplete gear column 153. A torsion spring 146 is sleeved on the outer wall of each jet shaft 141. The torsion spring 146 is located between the sprocket of the sprocket assembly 144 and the side wall of the freezing chamber 1, and both ends of the torsion spring 146 are fixedly connected to the surface of the sprocket of the sprocket assembly 144 and the side wall of the freezing chamber 1 respectively. Among them, the installation seat and the second rotating rod slide synchronously with the sliding of the sliding plate, so that the second gear column and the incomplete gear column gradually mesh with the driving gear and the rotating gear respectively. The driving gear drives the second gear column, the second rotating rod to rotate and the incomplete gear column to rotate. The incomplete gear column intermittently meshes with the rotating gear. When the incomplete gear column meshes with the rotating gear, it drives the jet shaft to rotate forward by a certain angle. Then the incomplete gear column is separated from the rotating gear. The jet shaft reverses back to its original position under the action of the restoring force of the torsion spring. Then the incomplete gear column meshes with the rotating gear again. In this way, the forward and reverse reciprocating swing of the jet shaft is realized, thereby increasing the jet area of the nitrogen jetting assembly and enabling the squid to be evenly frozen.

[0038] As Figure 2 and 10 shown: In this embodiment, in order to prevent nitrogen from dispersing too quickly to other positions during the jet freezing process, partition assemblies 16 are respectively arranged at the relative two ends of the mutually approaching side surfaces of the two sliding plates 10 for partitioning the interior of the freezing chamber 1; each partition assembly 16 includes a push rod 161 fixedly connected to the mutually approaching side surface of the sliding plate 10. One ends of the two push rods 161 approaching each other are inserted into the inner cavity of the freezing chamber 1 and symmetrically connected with a partition plate 162. The partition plate 162 is slidably connected to the top of the inner cavity of the freezing chamber 1. When the two partition plates 162 are in contact with each other, the two partition plates 162 are located in a turning trough 31. Through grooves 23 that cooperate with the partition plates 162 are respectively formed in the two side baffles 21. Among them, when the sliding plates on both sides slide, they can synchronously drive the partition plates on both sides to approach and slide towards each other, so that the partition plates pass through the through grooves and contact each other to prevent nitrogen from flowing outwards, enabling nitrogen to fully contact the squid and enabling the squid to be efficiently cooled and frozen. The arrangement of the partition plates can also reflect the nitrogen that is about to overflow back to make the nitrogen more concentrated.

[0039] As shown in Figure 10 : In this embodiment, in order to further prevent nitrogen from flowing away from below the partition and below the material turning tank, the inside of the partition 162 is a hollow structure. A rubber plate 163 is slidably connected to the lower part of the inner cavity of the partition 162. One end of the rubber plate 163 passes through the bottom of the partition 162. A limiting plate 164 is fixedly connected to the top of the rubber plate 163. A spring 165 is connected between the limiting plate 164 and the bottom of the inner cavity of the partition 162. On the symmetrical sides of the two partitions 162 close to each other, sliding blocks 166 are symmetrically slidably connected. On the symmetrical sides of the two sliding blocks 166 away from each other, extrusion rods 167 are symmetrically connected. The extrusion rods 167 are inserted into the inner cavity of the partition 162 and connected with extrusion blocks 168. A positioning seat 169 that cooperates with the extrusion block 168 is fixedly connected to the top of the limiting plate 164. A mutually cooperating inclined surface is provided between the positioning seat 169 and the extrusion block 168. And a positioning groove that cooperates with the sliding block 166 is provided on the side surface of the partition 162. When the two partitions are in contact with each other, the two sliding blocks can be pushed to slide into the partition. The extrusion block is driven to slide through the extrusion rod. Then, through the mutual cooperation of the extrusion block and the positioning seat, the rubber plate is pushed to slide downward and abut against the bottom of the material turning tank. And the rubber plate can have a certain deformation and buffering ability, which can avoid applying too much pressure to the squid and also avoid local gas leakage caused by uneven distribution of the squid.

[0040] As shown in Figure 1 : In this embodiment, a feeding plate and a discharging plate are respectively arranged at the opposite ends of the freezing chamber 1.

[0041] The specific working process of the above quick-freezing machine is as follows:

[0042] When quick-freezing squid, the squid to be quick-frozen is put onto the conveyor belt assembly 2 through the feeding plate. And due to the arrangement of the arc-shaped protrusions 3 on the conveyor belt, a gap can exist between the squid and the surface of the conveyor belt assembly 2 to form a nitrogen flow channel, so that nitrogen can contact the squid fully and evenly;

[0043] Then the driving motor 8 is started. The driving motor 8 drives the driving gear 9 and the reciprocating lead screws 6 on both sides to rotate synchronously. In the initial stage, the driving gear 9 meshes with the first gear column 12, driving the driven gear 5 and the conveyor belt assembly 2 to rotate, so as to convey the squid. During the conveying process of the squid, the reciprocating lead screw 6 gradually drives the first gear column 12 to slide. And after the squid is conveyed below the nitrogen jetting assembly 14, the first gear column 12 is separated from the driving gear 9 and the driven gear 5 (the conveyor belt assembly 2 stops conveying). During this process, the turning rod 133 continuously slides along with the sliding plate 10 but does not insert into the turning tank 31;

[0044] When the squid enters below the nitrogen gas jetting assembly 14, the jetting shaft 141 and the jetting head 142 of the nitrogen gas jetting assembly 14 jet atomized liquid nitrogen onto the squid to perform quick freezing on the squid.

[0045] Then, the drive motor 8 continues to drive the sliding plate 10 to slide, so that the turning rod 133 gradually inserts into the corresponding turning groove 31. And as the sliding plate 10 slides, the first rotating rod 131 also gradually inserts into the through hole 102 and the limiting column 134 gradually contacts the spiral groove 103 to cause the first rotating rod 131 to rotate. Thus, the turning rod 133 is driven by the fixed rod 132 to turn along the first semi-circular groove 101 and the second semi-circular groove 22, so as to turn the squid above the turning groove 31 to another turning groove 31, so that the squid can face upwards with different sides during freezing, and different positions of the squid are in direct contact with nitrogen gas, thereby improving the quick freezing effect.

[0046] After the turning is in place, the drive motor 8 continues to drive the reciprocating lead screw 6 to rotate. Through the cooperation of the reciprocating lead screw 6 and the sliding plate 10, the sliding plate 10 and the turning rod 133 slide in opposite directions. And when the sliding plate 10 slides back, through the re-cooperation of the limiting column 134 and the spiral groove 103, the turning rod 133 turns in the opposite direction to turn the squid again. Then the turning rod 133 gradually disengages from the conveyor belt assembly 2. And when disengaging, the first gear column 12 re-engages with the driving gear 9 and the driven gear 5, so as to drive the conveyor belt assembly 2 to move again to send the frozen squid out from the blanking plate, completing the quick freezing operation of the squid.

[0047] Meanwhile, when the sliding plate 10 pushes the turning rod 133 to slide towards the conveyor belt assembly 2, the sliding plate 10 can also synchronously push the push rod 161 and the mounting seat 15 to slide.

[0048] Among them, the push rod 161 pushes the partition plates 162 on both sides to gradually pass through the grooves of the baffle 21 and then abut and contact to form a partition plate. The partition plates at both ends wrap the nitrogen jetting assembly 14 inside, so that nitrogen will not escape to the outside too quickly during the nitrogen jetting process, thereby improving the utilization rate of nitrogen. A small amount of the overflowing nitrogen can partially flow to the front end of the conveyor belt assembly 2 to pre-cool the squid at the front end; and when the two partition plates 162 abut against each other, they can push the two sets of sliding blocks 166 to slide into the partition plates 162, and then push the extrusion block 168 to slide towards the positioning seat 169 through the extrusion rod 167. Then, through the inclined surface cooperation between the positioning seat 169 and the extrusion block 168, the rubber plate 163 is pushed to slide downward and inserted into a set of turning troughs 31, thereby further avoiding gas loss. Moreover, using the rubber plate 163 can not only reduce the impact force, but also generate local deformation through the deformation ability of the rubber (that is, it can also be in close contact with the bottom of the turning trough 31 when there is local squid in the turning trough 31). When the sliding plate 10 slides back, the two sliding blocks 166 separate from each other, and the rubber plate 163 returns to its original position under the restoring force of the spring 165, disengaging from the contact with the turning trough 31. Then, through the sliding of the sliding plate 10, the partition plate 162 is returned to its original position.

[0049] Among them, the sliding plate 10 synchronously drives the mounting seat 15 to slide, so that the second gear column 152 on the mounting seat 15 gradually meshes with the driving gear 9, and the incomplete gear column 153 meshes with the rotating gear 145. After the second gear column 152 meshes with the driving gear 9, it can drive the second rotating rod 151 and the incomplete gear column 153 to rotate, so that the incomplete gear column 153 intermittently drives the rotating gear 145 to rotate forward. Then, through the setting of the sprocket assembly 144, the jet shaft 141 and the jet head 142 are synchronously driven to swing forward. After the incomplete gear column 153 disengages from the rotating gear 145, the jet shaft 141 rotates reversely under the restoring force of the torsion spring 146, so that the jet shaft 141 swings reversely. In this way, the forward and reverse reciprocating swing of the jet shaft 141 is realized, so that the squid can fully and evenly contact with nitrogen and be frozen.

[0050] In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "setting", "connection", "fixation", "swivel connection" and the like shall 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, and it can be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly limited, 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.

[0051] 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 modifications can be made thereto 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. A squid liquid nitrogen quick freezing machine, characterized in that: The invention comprises a freezing chamber (1), wherein a conveyor belt assembly (2) is arranged in an inner cavity of the freezing chamber (1), a conveyor belt surface of the conveyor belt assembly (2) is equidistantly arranged with a plurality of arc-shaped protrusions (3), and a turning groove (31) is formed between two adjacent arc-shaped protrusions (3), a drive box (4) is symmetrically fixedly connected to opposite side walls of the freezing chamber (1), opposite ends of a conveyor roller at the end of the conveyor belt assembly (2) respectively pass through opposite side walls of the freezing chamber (1) and are provided with a driven gear (5), a reciprocating screw rod (6) is rotatably connected between the inner wall of the drive box (4) and the freezing chamber (1), and the two reciprocating screw rods (6) have opposite rotation directions and equal pitches, a connecting rod (7) is connected between the two reciprocating screw rods (6), and the connecting rod (7) passes through between the upper and lower sides of the conveyor belt assembly (2), and a side wall of the drive box (4) is provided. A driving motor (8) connected to a reciprocating screw (6) is connected, the output end of the driving motor (8) is inserted into the inner cavity of a driving box (4) and is installed with a driving gear (9), the outer wall of the reciprocating screw (6) is threadedly connected with a sliding plate (10), one side of the sliding plate (10) is rotatably connected with a rotating shaft (11), the outer wall of the rotating shaft (11) is fixedly connected with a first gear column (12), and the first gear column (12) is respectively meshed with a driven gear (5) and a driving gear (9), a side of the sliding plate (10) close to the freezing chamber (1) is installed with a plurality of material turning rod assemblies (13), and each material turning rod assembly (13) is arranged one by one corresponding to each material turning groove (31), and a nitrogen injection assembly (14) is arranged above the inner cavity of the freezing chamber (1), and the nitrogen injection assembly (14) is arranged corresponding to two driving boxes (4); The tipping rod assembly (13) comprises a first rotating rod (131) rotatably connected to the sliding plate (10); one side of the first rotating rod (131) is connected to a tipping rod (133) via a fixing rod (132); one end of the tipping rod (133) passes through a side wall of the freezing chamber (1); the side wall of the freezing chamber (1) is provided with a first semicircular groove (101) that cooperates with the tipping rod (133); a limiting column (134) is provided on one side of the end of the first rotating rod (131); and the side wall of the freezing chamber (1) is provided with a through hole that cooperates with the first rotating rod (131). The through hole (102) is provided with a spiral groove (103) on the inner wall of the through hole (102) and cooperates with the limiting column (134). The first rotating rod (131) and the tipping rod (133) slide synchronously with the sliding of the sliding plate (10). When the tipping rod (133) passes through the first semicircular groove (101) and is gradually inserted into the middle position of the conveyor belt assembly (2), the limiting column (134) on the side wall of the first rotating rod (131) is gradually inserted into the through hole (102) and causes the first rotating rod (131) to rotate by cooperating with the spiral groove (103).

2. The squid liquid nitrogen quick freezing machine according to claim 1, characterized in that: Baffles (21) are symmetrically arranged on opposite sides of the conveyor belt assembly (2), and the top of the baffle (21) abuts against the top of the inner cavity of the freezing chamber (1). The baffle (21) is provided with a second semicircular groove (22) that cooperates with the tipping rod (133).

3. The squid liquid nitrogen quick freezing machine according to claim 1, characterized in that: The nitrogen jet assembly (14) comprises a plurality of jet shafts (141) installed between two opposite side walls of the freezing chamber (1), the bottom of each jet shaft (141) is connected to a plurality of jet heads (142), and the jet heads (142) are arranged toward the conveyor belt assembly (2), and the side wall of the drive box (4) is connected to an air intake pipe (143) connected to an external nitrogen tank, and the air intake pipe (143) is connected to the jet shaft (141).

4. The squid liquid nitrogen quick freezing machine according to claim 3, characterized in that: The air inlet pipe (143) is sealedly connected to the jet shaft (141) via a rotating flange, and a plurality of the jet shafts (141) are connected via a sprocket assembly (144). A rotating gear (145) is fixedly connected to the outer wall of one of the jet shafts (141). A mounting seat (15) is mounted on the top of the sliding plate (10). A second rotating rod (151) is rotatably connected to the mounting seat (15). One end of the second rotating rod (151) is fixedly connected to a second gear column (152) meshingly connected to a driving gear (9). After the first gear column (12) is separated from the driving gear (9), the second gear column (152) meshes with the driving gear (9). An incomplete gear column (153) meshingly connected to the rotating gear (145) is fixedly connected to the outer wall of the other end of the second rotating rod (151), and a plurality of gear tooth groups are arranged at equal angles on the outer wall of the incomplete gear column (153).

5. The squid liquid nitrogen quick freezing machine according to claim 4, characterized in that: The outer wall of each jet shaft (141) is sleeved with a torsion spring (146), the torsion spring (146) being located between the sprocket of the sprocket assembly (144) and the side wall of the freezing chamber (1), and the two ends of the torsion spring (146) being respectively fixedly connected to the sprocket surface of the sprocket assembly (144) and the side wall of the freezing chamber (1).

6. The squid liquid nitrogen quick freezing machine according to claim 2, characterized in that: The two opposite ends of a side surface of the two sliding plates (10) close to each other are respectively provided with partition components (16) for partitioning the interior of the freezing chamber (1); The partition assemblies (16) each include a push rod (161) fixed to a side surface of the sliding plate (10) close to each other, and the ends of the two push rods (161) close to each other are inserted into the inner cavity of the freezing chamber (1) and are symmetrically connected to the partition (162), and the partition (162) is slidably connected to the top of the inner cavity of the freezing chamber (1). When the two partitions (162) are abutted against each other, the two partitions (162) are located in a material turning chute (31).

7. The squid liquid nitrogen quick freezing machine according to claim 6, characterized in that: The baffles (21) on both sides are provided with through slots (23) that cooperate with the partitions (162).

8. The squid liquid nitrogen quick freezing machine according to claim 6, characterized in that: The interior of the partition (162) is a hollow structure. A rubber plate (163) is slidably connected to the bottom of the inner cavity of the partition (162). One end of the rubber plate (163) passes through the bottom of the partition (162). The top of the rubber plate (163) is fixedly connected to a limit plate (164). A spring (165) is connected between the limit plate (164) and the bottom of the inner cavity of the partition (162). The side surfaces of the two partitions (162) that are close to each other are symmetrically slidably connected to sliding blocks (166). The side surfaces of the two sliding blocks (166) that are away from each other are symmetrically connected to extrusion rods (167). The extrusion rods (167) are inserted into the inner cavity of the partition (162) and connected to the extrusion block (168). The top of the limit plate (164) is fixedly connected to a positioning seat (169) that cooperates with the extrusion block (168). An inclined surface that cooperates with each other is provided between the positioning seat (169) and the extrusion block (168).

9. A method for quick freezing squid, characterized in that: The quick freezing is carried out using the liquid nitrogen quick freezing machine described in any one of claims 1 to 8.

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