Liquid nitrogen instant freezer for squids and instant freezing method

Abstract

The squid liquid nitrogen instant freezer comprises a freezing chamber, the freezing chamber is provided with a conveying belt assembly, the conveying belt assembly is provided with a plurality of arc-shaped protrusions at equal intervals, and a plurality of material turning rod assemblies are installed on the side face, close to the freezing chamber, of a sliding plate; the driving motor drives the conveying belt assembly to move to convey squids to the position below the nitrogen injection assembly, meanwhile, due to the fact that arc-shaped protrusions arranged on the conveying belt assembly enable the squids and the surface of the conveying belt to be spaced and not to make close contact, and the driving motor can synchronously drive a reciprocating lead screw to rotate in the conveying process; and after squids are conveyed in place, the first gear column is separated from a driving gear, and the squids are not conveyed any more, so that the squids are statically located below the nitrogen injection assembly for air injection quick freezing, the contact time of the squids and nitrogen is prolonged, and the quick freezing effect of the squids is guaranteed.

Description

Technical Field

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

[0002] After the squid is processed, it is generally necessary to use a liquid nitrogen quick-freezing machine for quick freezing to ensure the freshness of the squid product. During quick freezing, the existing liquid nitrogen quick-freezing machine will transport the product to a freezing chamber through a conveyor belt assembly, and then use a liquid nitrogen atomizer above the freezing chamber for rapid jet freezing. However, during this process, one side of the squid product will be closely attached to the conveyor belt during transportation, which results in uneven freezing during quick freezing. Moreover, during the quick freezing process, the squid can only be kept in a fixed position for quick freezing, which also results in uneven quick freezing and unsatisfactory effect. Therefore, the present invention 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 invention aims to provide a squid liquid nitrogen quick-freezing machine and a quick-freezing method, which can make different positions of the squid 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: A squid liquid nitrogen quick freezing machine comprises a freezing chamber, wherein a conveyor belt assembly is arranged in the inner cavity of the freezing chamber, a plurality of arc-shaped protrusions are arranged at equal distances on the conveyor belt surface of the conveyor belt assembly, and a turning groove is formed between two adjacent arc-shaped protrusions, a driving box is symmetrically fixedly connected to opposite side walls of the freezing chamber, opposite ends of a conveyor roller at the end of the conveyor belt assembly respectively pass through the opposite side walls of the freezing chamber and are installed with driven gears, a reciprocating screw rod is rotatably connected between the inner wall of the driving box and the freezing chamber, and the two reciprocating screw rods have opposite rotation directions and equal pitches, a connecting rod is connected between the two reciprocating screw rods, and the connecting rod extends from the upper and lower sides of the conveyor belt assembly. The gear train is connected to the gear of the driving box through a hole, and the gear train is connected to the gear of the driving box through a hole. ...

[0005] Preferably, the flipping rod assembly includes a first rotating rod rotatably connected to the sliding plate, one side of the first rotating rod is connected to the flipping rod through a fixed rod, and one end of the flipping rod passes through the side wall of the freezer chamber, the side wall of the freezer chamber is provided with a first semicircular groove that cooperates with the flipping rod, a limiting column is arranged on one side of the end of the first rotating rod, the side wall of the freezer chamber is provided with a through hole that cooperates with the first rotating rod, and the inner wall of the through hole is provided with a spiral groove that cooperates with the limiting column.

[0006] Preferably, baffles are symmetrically arranged on two opposite sides of the conveyor belt assembly, and the top of the baffle is in contact with the top of the inner cavity of the freezing chamber, and the baffle is provided with a second semicircular groove that cooperates with the turning rod.

[0007] Preferably, the nitrogen jet assembly includes a plurality of jet shafts installed between the opposite side walls of the freezing chamber, a plurality of jet heads are connected to the bottom of each of the jet shafts, and the jet heads are arranged toward the conveyor belt assembly, and the side wall of the drive box is connected to an air intake pipe connected to an external nitrogen tank, and the air intake pipe is connected to the jet shaft.

[0008] Preferably, the air inlet pipe and the jet shaft are sealed and connected via a rotating flange, a plurality of the jet shafts are connected via a sprocket assembly, a rotating gear is fixedly connected to the outer wall of one of the jet shafts, a mounting seat is installed on the top of the sliding plate, a second rotating rod is rotatably connected to the mounting seat, a second gear column meshingly connected to the driving gear is fixedly connected to one end of the second rotating rod, and after the first gear column is separated from the driving gear, the second gear column is meshingly connected to the driving gear, an incomplete gear column meshingly connected to the rotating gear is fixedly connected to the outer wall of the other end of the second rotating rod, and a plurality of gear tooth groups are arranged at equal angles on the outer wall of the incomplete gear column.

[0009] Preferably, a torsion spring is sleeved on the outer wall of each jet shaft, and the torsion spring is located between the sprocket of the sprocket assembly and the side wall of the freezer chamber, and two ends of the torsion spring are respectively fixed to the sprocket surface of the sprocket assembly and the side wall of the freezer chamber.

[0010] Preferably, the two opposite ends of the side surface of the two sliding plates close to each other are respectively provided with partition assemblies for separating the interior of the freezing chamber; The partition assemblies all include push rods fixed to one side of the sliding plate close to each other, the ends of the two push rods close to each other are inserted into the inner cavity of the freezer and are symmetrically connected with partitions, and the partitions are slidably connected to the top of the inner cavity of the freezer, and when the two partitions are abutted against each other, the two partitions are located in a material turning trough.

[0011] Preferably, the baffles on both sides are provided with through grooves which cooperate with the partitions.

[0012] Preferably, the interior of the partition is a hollow structure, a rubber plate is slidably connected to the bottom of the inner cavity of the partition, one end of the rubber plate passes through the bottom of the partition, the top of the rubber plate is fixedly connected to a limiting plate, a spring is connected between the limiting plate and the bottom of the inner cavity of the partition, two partitions are symmetrically slidably connected to sliding blocks on the side where they are close to each other, and two sliding blocks are symmetrically connected to extrusion rods on the side where they are away from each other, the extrusion rods are inserted into the inner cavity of the partition and connected to the extrusion blocks, a positioning seat that cooperates with the extrusion block is fixedly connected to the top of the limiting plate, and mutually cooperating inclined surfaces are arranged between the positioning seat and the extrusion block.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. When freezing the squid, the present invention can drive the conveyor belt assembly to move by the driving motor to transport the squid to the bottom of the nitrogen jet assembly. At the same time, due to the arc-shaped protrusions arranged on the conveyor belt assembly, there can be a distance between the squid and the conveyor belt surface, so that they will not be in close contact, so that the nitrogen can fully contact the lower surface of the squid. In addition, during the conveying process, the driving motor can synchronously drive the reciprocating 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 between the driving gear and the driven gear. After the squid is transported to the right position, the first gear column disengages from the driving gear, so that the squid is no longer transported, so that the squid is stationary under the nitrogen jet assembly for jet quick freezing, thereby increasing the contact time between the squid and the nitrogen and ensuring the quick freezing effect of the squid.

[0014] 2. During the static quick freezing process of the squid, the driving motor continues to drive the sliding plate to slide, pushing the turning rod to be inserted into the turning trough, and the first rotating rod is gradually inserted 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, thereby driving the turning rod to rotate along the first rotating rod through the fixed rod, so that the squid on the turning trough can be turned over to the adjacent turning trough, thereby realizing the movement of the squid during the quick freezing process, so that different positions of the squid can be fully in contact with the nitrogen, thereby improving the quick freezing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the quick-freezing machine of the present invention; Figure 2It is a schematic diagram of the front cross-section structure of the quick-freezing machine of the present invention; Figure 3 It is a schematic diagram of the structure of the driving motor and its connecting parts in the quick-freezing machine of the present invention from a first angle; Figure 4 It is a second angle structural schematic diagram of the driving motor and its connecting parts in the quick freezer of the present invention; Figure 5 for Figure 3 A schematic diagram of the structure enlargement at the center A; Figure 6 It is a schematic diagram of the partial structure of the freezing chamber in the quick-freezing machine of the present invention; Figure 7 It is a structural schematic diagram of a conveyor belt assembly in a quick freezer of the present invention; Figure 8 It is a structural schematic diagram of a nitrogen gas jetting assembly in a quick freezer of the present invention; Fig. 9 for Figure 8 A schematic diagram of the structure enlarged at B in the middle; Fig.10 It is a structural schematic diagram of the partition assembly in the quick-freezing machine of the present invention.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Freezer; 101. First semicircular groove; 102. Through hole; 103. Spiral groove; 2. Conveyor belt assembly; 21. Baffle; 22. Second semicircular groove; 23. Through groove; 3. Arc-shaped protrusion; 31. Turning chute; 4. Driving box; 5. Driven gear; 6. Reciprocating screw rod; 7. Connecting rod; 8. Driving motor; 9. Driving gear; 10. Sliding plate; 11. Rotating shaft; 12. First gear column; 13. Turning rod assembly; 131. First rotating rod; 132. Fixed rod; 133. Turning rod; 134. Limit Positioning column; 14, nitrogen jet assembly; 141, jet shaft; 142, jet 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 assembly; 161, push rod; 162, partition; 163, rubber sheet; 164, limit plate; 165, spring; 166, sliding block; 167, extrusion rod; 168, extrusion block; 169, positioning seat. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figure 1-10 As shown: Embodiment 1 of the present invention is: like Figure 1 , 2 , 3 and 4: a squid liquid nitrogen quick freezing machine, comprising a freezing chamber 1, an inner cavity of the freezing chamber 1 is provided with a conveyor belt assembly 2 for conveying squid, a conveyor belt surface of the conveyor belt assembly 2 is provided with a plurality of arc-shaped protrusions 3 at equal distances, and a turning groove 31 is formed between two adjacent arc-shaped protrusions 3, a driving box 4 is symmetrically fixed to the opposite side walls of the freezing chamber 1, the opposite ends of a conveying roller at the end of the conveyor belt assembly 2 respectively pass through the opposite side walls of the freezing chamber 1 and are installed with a driven gear 5, a reciprocating screw rod 6 is rotatably connected between the inner wall of the driving 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 between the upper and lower sides of the conveyor belt assembly 2, a driving motor 8 connected to the reciprocating screw rod 6 is connected to a side wall of the driving box 4, and the output end of the driving motor 8 is inserted into the inner cavity of the driving box 4 and installed A driving gear 9 is installed, and a sliding plate 10 is threadedly connected to the outer wall of the reciprocating screw 6. A side of the sliding plate 10 is rotatably connected to a rotating shaft 11. A first gear column 12 is fixed 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 plurality of flippable turning rod assemblies 13 are installed on the side of the sliding plate 10 close to the freezing chamber 1, and each turning rod assembly 13 is arranged corresponding to each turning groove 31. After the reciprocating screw 6 drives the first gear column 12 to disengage from the meshing with the driving gear 9 and the driven gear 5, each turning rod assembly 13 is simultaneously inserted into the corresponding turning groove 31 and flipped in the same direction to an adjacent turning groove 31. A nitrogen jet assembly 14 is arranged above the inner cavity of the freezing chamber 1, and the nitrogen jet assembly 14 is arranged corresponding to two drive boxes 4.

[0020] like Figure 3 and 5As shown: In this embodiment, in order to realize automatic flipping of the flipping rod assembly, the flipping rod assembly 13 includes a first rotating rod 131 rotatably connected to the sliding plate 10, one side of the first rotating rod 131 is connected to the flipping rod 133 through a fixed rod 132, and one end of the flipping rod 133 passes through the side wall of the freezing chamber 1, and the side wall of the freezing chamber 1 is provided with a first semicircular groove 101 that cooperates with the flipping rod 133, a limiting column 134 is arranged 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 102 that cooperates with the first rotating rod 131, and the inner wall of the through hole 102 is provided with a spiral groove 103 that cooperates with the limiting column 134. The first rotating rod and the turning rod can slide synchronously with the sliding of the sliding plate, wherein the turning rod assembly is inserted into the turning groove of the conveyor belt assembly, and the sliding rod gradually approaches the through hole, and when the turning rod is about to reach the middle position of the conveyor belt assembly, the limiting column on the side wall of the first rotating rod is gradually inserted into the through hole, and the first rotating rod is rotated by cooperating with the spiral groove, and then the turning rod is driven by the fixed rod to turn along the central axis of the first rotating rod, and turn into an adjacent turning groove, so as to realize the turning of the squid material on the turning groove into the adjacent turning groove, realize the turning of the squid, and improve the freezing effect of the squid.

[0021] like Figure 8 and 9 As shown: In this embodiment, the nitrogen injection assembly 14 includes a plurality of injection shafts 141 installed between the opposite side walls of the freezing chamber 1, and a plurality of injection heads 142 are connected to the bottom of each injection shaft 141, and the injection head 142 is arranged toward the conveyor belt assembly 2, and the side wall of the driving 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 injection shaft 141.

[0022] like Figure 7 As 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 tipping rod assembly and the conveyor belt assembly when the tipping rod assembly is inserted into the freezer, that is, it does not affect the normal transportation of the conveyor belt assembly, baffles 21 are symmetrically arranged on the 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 freezer 1, and the baffle 21 is provided with a second semicircular groove 22 that cooperates with the tipping rod 133. By arranging baffles on both sides of the conveyor belt assembly, the squid on the conveyor belt assembly can be blocked by the baffle to avoid falling, so that there can be a distance between the conveyor belt assembly and the inner wall of the freezer, so that the initial position of the tipping rod assembly can be between the conveyor belt assembly and the inner wall of the freezer, and thus will not affect the normal transportation of the conveyor belt assembly.

[0023] like Figure 8 and 9As shown: In this embodiment, in order to increase the jet area of ​​the liquid nitrogen jet assembly so that the squid can be frozen evenly, the air inlet pipe 143 and the jet shaft 141 are sealed and connected by a rotating flange, and several jet shafts 141 are connected by a sprocket assembly 144. A rotating gear 145 is fixedly connected to the outer wall of one jet shaft 141, and a mounting seat 15 is installed on the top of the sliding plate 10. The mounting seat 15 penetrates and is rotatably connected to the second rotating rod 151. One end of the second rotating rod 151 is fixedly connected to a second gear column 152 meshed with the driving gear 9, and after the first gear column 12 is separated from the driving gear 9, the second gear column 152 is meshed with the driving gear 9. The outer wall of the other end of the second rotating rod 151 is fixedly connected to an incomplete gear column 153 meshed with the rotating gear 145, and the outer wall of the incomplete gear column 153 is provided with a plurality of gear tooth groups at equal angles, and the outer wall of each jet shaft 141 is sleeved with a torque Spring 146, torsion spring 146 is located between the sprocket of sprocket assembly 144 and the side wall of freezing chamber 1, and two ends of torsion spring 146 are respectively fixed to the sprocket surface of sprocket assembly 144 and the side wall of freezing chamber 1, wherein the mounting 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, and the driving gear drives the second gear column, the second rotating rod to rotate and the incomplete gear column to rotate, and 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, and then the incomplete gear column is separated from the rotating gear, and the jet shaft reverses back to its original position under the action of the restoring force of the torsion spring, and then the incomplete gear column meshes with the rotating gear again, so that the jet shaft can swing back and forth in this way, thereby increasing the jet area of ​​the nitrogen jet assembly and allowing the squid to be evenly frozen.

[0024] like Figure 2 and 10 As shown: In this embodiment, in order to prevent nitrogen from being dispersed to other positions too quickly during the jet freezing process, the two sliding plates 10 are provided with a partition assembly 16 for partitioning the inside of the freezing chamber 1 at opposite ends of the side surface close to each other; the partition assembly 16 includes a push rod 161 fixed to the side surface close to each other of the sliding plate 10, and the two push rods 161 are inserted into the inner cavity of the freezing chamber 1 at the ends close to each other and are symmetrically connected with a 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 in contact with each other, the two partitions 162 are located in a turning trough 31, and the baffles 21 on both sides are penetrated and opened with through grooves 23 that cooperate with the partition 162. When the sliding plates on both sides slide, the partitions on both sides can be synchronously driven to slide close to each other, so that the partitions pass through the through grooves and abut against each other to prevent nitrogen from flowing outward, so that the nitrogen can fully contact the squid and make the squid efficiently cooled and frozen, and the setting of the partition can also reflect the nitrogen that is about to overflow back to make the nitrogen more concentrated.

[0025] like Fig.10 As shown: In this embodiment, in order to further prevent nitrogen from flowing away from the bottom of the partition and the bottom of the material turning chute, the interior of the partition 162 is a hollow structure, and 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, and the top of the rubber plate 163 is fixedly connected to a limit plate 164, and a spring 165 is connected between the limit plate 164 and the bottom of the inner cavity of the partition 162. The side of the two partitions 162 that are close to each other is symmetrically slidably connected to a sliding block 166, and the side of the two sliding blocks 166 that are away from each other is symmetrically connected to an extrusion rod 167, which is inserted into the inner cavity of the partition 162 and connected to an extrusion block 168. The limit plate 1 A positioning seat 169 that cooperates with the extrusion block 168 is fixed to the top of 64, and a mutually cooperating inclined surface is set between the positioning seat 169 and the extrusion block 168, and a positioning groove that cooperates with the sliding block 166 is opened on the side of the partition 162, wherein when the two partitions abut against each other, the two sliding blocks can be pushed to slide inside the partition, and the extrusion block is driven to slide by the extrusion rod, and then the rubber plate is pushed to slide downward and abut against the bottom of the turning trough through the mutual cooperation of the extrusion block and the positioning seat, and the use of the rubber plate can have a certain deformation and buffering capacity, which can avoid excessive pressure on the squid while also avoiding local gas leakage caused by uneven distribution of the squid.

[0026] like Figure 1 As shown: In this embodiment, a feed plate and a discharge plate are respectively arranged at opposite ends of the freezing chamber 1.

[0027] The specific working process of the above-mentioned quick-freezing machine is as follows: When the squid is quick-frozen, the squid to be quick-frozen is put into the conveyor belt assembly 2 through the feed plate, and due to the arrangement of the arc-shaped protrusions 3 on the conveyor belt, a distance can be formed between the squid and the surface of the conveyor belt assembly 2 and a nitrogen flow channel is formed, so that the nitrogen can fully and evenly contact the squid; Then, the driving motor 8 is started, and the driving motor 8 drives the driving gear 9 and the reciprocating screw rods 6 on both sides to rotate synchronously. In the initial stage, the driving gear 9 is meshed 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 squid conveying process, the reciprocating screw rod 6 gradually drives the first gear column 12 to slide, and after the squid is conveyed to the bottom of the nitrogen jet 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). In this process, the turning rod 133 continues to slide with the sliding plate 10 but is not inserted into the turning trough 31; When the squid enters below the nitrogen jet assembly 14, the jet shaft 141 and the jet head 142 of the nitrogen jet assembly 14 jet atomized liquid nitrogen toward the squid to quickly freeze the squid.

[0028] Then, the driving motor 8 continues to drive the sliding plate 10 to slide, so that the turning rod 133 is gradually inserted into the corresponding turning groove 31, and as the sliding plate 10 slides, the first rotating rod 131 is also gradually inserted into the through hole 102, and the limiting column 134 gradually contacts the spiral groove 103 to rotate the first rotating rod 131, so that the turning rod 133 is turned along the first semicircular groove 101 and the second semicircular groove 22 under the drive of the fixing rod 132, so that the squid above the turning groove 31 is turned to another turning groove 31, so that the squid can face up at different sides during freezing, and different positions of the squid can be directly in contact with nitrogen, so as to improve the quick freezing effect; After flipping into place, the driving motor 8 continues to drive the reciprocating screw 6 to rotate, and the reciprocating screw 6 cooperates with the sliding plate 10 to make the sliding plate 10 and the flipping rod 133 slide in opposite directions, and when the sliding plate 10 slides back, the limiting column 134 cooperates with the spiral groove 103 again, so that the flipping rod 133 flips in the opposite direction, flips the squid again, and then the flipping 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, thereby driving the conveyor belt assembly 2 to move again to send the frozen squid out of the unloading plate, completing the quick freezing operation of the squid.

[0029] At the same time, when the sliding plate 10 pushes the tipping rod 133 to slide in the direction of the conveyor belt assembly 2, the sliding plate 10 can also synchronously push the push rod 161 and the mounting seat 15 to slide synchronously.

[0030] The push rod 161 pushes the partitions 162 on both sides to gradually pass through the groove of the baffle 21 and then abut against each other to form a partition, and the partitions at both ends wrap the nitrogen injection assembly 14 inside, so that the nitrogen will not escape to the outside too quickly during the nitrogen injection process, thereby improving the utilization rate of the nitrogen, and a small amount of overflowed 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 partitions 162 abut against each other, they can push the two sets of sliding blocks 166 to slide inside the partition 162, and then push the extrusion block 168 to slide toward the positioning seat 169 through the extrusion rod 167, and then through the positioning seat The inclined surfaces 169 and the extrusion block 168 cooperate to push the rubber plate 163 to slide downward and insert it into a group of turning grooves 31, so as to further avoid gas loss. In addition, the use of the rubber plate 163 can not only reduce the impact force, but also produce local deformation through the deformation ability of the rubber (that is, when there is squid locally in the turning groove 31, it can also be in close contact with the bottom of the turning groove 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 action of the restoring force of the spring 165, and breaks away from the contact with the turning groove 31, and then the sliding of the sliding plate 10 is used to realize the return of the partition 162.

[0031] 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, and then the sprocket assembly 144 is set to synchronously drive the jet shaft 141 and the jet head 142 to swing forward, and after the incomplete gear column 153 is separated from the contact with the rotating gear 145, the jet shaft 141 rotates in the opposite direction under the action of the restoring force of the torsion spring 146, so that the jet shaft 141 swings in the opposite direction, and the jet shaft 141 swings back and forth in this way, so that the squid can be fully and evenly contacted with nitrogen and frozen.

[0032] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0033] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which 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 the two driving boxes (4).

2. The squid liquid nitrogen quick freezing machine according to claim 1, characterized in that: 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 the 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 arranged on one side of the end of the first rotating rod (131); the side wall of the freezing chamber (1) is provided with a through hole (102) that cooperates with the first rotating rod (131); and the inner wall of the through hole (102) is provided with a spiral groove (103) that cooperates with the limiting column (134).

3. The squid liquid nitrogen quick freezing machine according to claim 2, 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).

4. 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).

5. The squid liquid nitrogen quick freezing machine according to claim 4, 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).

6. The squid liquid nitrogen quick freezing machine according to claim 5, 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).

7. The squid liquid nitrogen quick freezing machine according to claim 3, 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).

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

9. The squid liquid nitrogen quick freezing machine according to claim 7, 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).

10. 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 9.

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