Spiral liquid nitrogen freezing device for aquatic products

Abstract

The invention relates to the technical field of freezing equipment, in particular to an aquatic product spiral liquid nitrogen freezing device which comprises a shell. The shell is of a cylindrical structure, a supporting column is arranged in the shell, the supporting column is slidably arranged in the shell in the height direction of the shell, and the spiral guide rail is fixedly arranged on the supporting column along the axis of the supporting column; the multiple layering rods are arranged above the spiral guide rail in the spiral direction of the spiral guide rail and form a spiral layer, the spiral layer divides the spiral guide rail into an upper cavity and a lower cavity, and aquatic products slide in the upper cavity in the extending direction of the spiral guide rail after entering the spiral guide rail; the liquid nitrogen supply device is of a spiral structure and is arranged on the side wall of the spiral guide rail in the extending direction of the spiral guide rail, and the liquid nitrogen supply device supplies liquid nitrogen into the spiral guide rail. The working stability of the freezing device is guaranteed, the later deicing workload is reduced, and meanwhile the freezing efficiency of the freezing device can be guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of refrigeration equipment, and in particular to an aquatic spiral liquid nitrogen refrigeration device. Background Art

[0002] At present, liquid nitrogen freezing equipment is generally divided into cabinet type and tunnel type liquid nitrogen freezing equipment. Tunnel type liquid nitrogen freezing equipment uses a conveyor belt to transport frozen products, and freezes the aquatic products during the transportation process. It is suitable for large-scale frozen production of aquatic products. However, the current tunnel type liquid nitrogen freezing equipment has the following shortcomings: since the aquatic products usually maintain a fixed position during the transportation of the aquatic products on the conveyor belt, a certain part of the aquatic products is always attached to the conveyor belt, especially the fish has a larger contact area with the conveyor belt; and the liquid nitrogen nozzle of the liquid nitrogen freezing equipment is usually arranged above and / or on one side of the conveyor belt, which results in that part of the surface of the aquatic product cannot be sprayed by liquid nitrogen during the entire freezing process, making it difficult to quickly freeze this part of the aquatic product, which not only prolongs the freezing time of the part, but also makes it difficult to maintain the original flavor and quality of the product; thereby reducing the overall freezing efficiency and freezing quality of the aquatic product.

[0003] Chinese patent CN203762166U discloses a spiral liquid nitrogen freezing device for aquatic products, including a freezing chamber, a vertical screw conveyor arranged in the freezing chamber for conveying aquatic products, and a turning device arranged on the vertical screw conveyor for turning over the aquatic products, the vertical screw conveyor includes a supporting column and a spiral conveying chain spirally coiled along the supporting column, the supporting column is provided with a plurality of liquid nitrogen nozzles extending around the spiral conveying chain, the liquid nitrogen nozzles are located above the spiral conveying chain, and the liquid nitrogen nozzles are arranged downward; the turning device is arranged in the middle of the supporting column, and the turning device is located above the spiral conveying chain, the turning device includes a horizontal conveying track and a turning mechanism installed on the supporting column; one end of the horizontal conveying track is close to or against the spiral conveying chain, and the other end is provided with the turning mechanism, the turning mechanism includes a guide arc plate, a turning arc plate and an anti-blocking adjustment device for adjusting the turning arc plate, the guide arc plate is located between the turning arc plate and the horizontal conveying track, the upper end of the turning arc plate is located above the horizontal conveying track, and the lower end is located The turning arc plate is arched in the direction away from the guide arc plate below the horizontal conveying track, and the upper end of the turning arc plate is rotatably set on the supporting column through the first shaft rod, and the first shaft rod extends radially along the supporting column; the guiding arc plate is fixedly set on the supporting column, the upper end of the guiding arc plate is close to or against the end of the horizontal conveying track, and the lower end is located below the horizontal conveying track and extends in the turning arc plate direction to the inside of the turning arc plate; the guiding arc plate is arched toward the turning arc plate; a baffle rod is provided on the supporting column, and the baffle rod is located between the guiding arc plate and the turning arc plate The anti-blocking adjusting device and the guide arc plate are located on the opposite sides of the turning arc plate, the anti-blocking adjusting device includes a supporting baffle fixed on the supporting column, a first limiting column fixed on the supporting baffle, a second limiting column fixed on the turning arc plate and an adjusting spring, the supporting baffle and the turning arc plate are located on the opposite sides of the first and second limiting columns, the adjusting spring is sleeved on the first and second limiting columns, one end of the adjusting spring is against the supporting baffle, and the other end is against the turning arc plate.

[0004] Although the above scheme improves the freezing efficiency and quality, the aquatic products need to be flipped by a flipping device during freezing to ensure the freezing quality. However, the flipping device will cause the aquatic products to fall from the spiral conveyor chain when flipping. At the same time, due to the presence of moisture in the aquatic products themselves, a thick layer of ice will form on the spiral conveyor chain after a period of use, which reduces the conveying effect of the spiral conveyor chain and increases the probability of the aquatic products slipping from the spiral conveyor chain. In addition, since the aquatic products need to be flipped, the speed of the aquatic products moving in the spiral conveyor chain should not be too fast, otherwise the flipping device will not be able to accurately flip the aquatic products. Summary of the invention

[0005] In view of the above problems, a spiral liquid nitrogen freezing device for aquatic products is provided. When in use, the aquatic products are placed into the spiral guide rail from the input end of the spiral guide rail. The aquatic products on the spiral guide rail are supported by the layered rods. Since the arrangement of the layered rods is also a spiral structure and a liquid nitrogen supply device is provided on the side wall of the spiral guide rail, the aquatic products gradually descend along the extension direction of the spiral guide rail under the support of the layered rods. The liquid nitrogen supply device supplies liquid nitrogen to the upper chamber and the lower chamber respectively, so that both sides of the aquatic products sliding on the layered rods can be evenly cooled, so that the aquatic products can be quickly frozen. During the freezing process, the aquatic products themselves carry moisture, so the spiral structure The automatic de-icing function can be realized on the structure and the stratification rod. The detector is used to detect whether the aquatic products have passed. If the aquatic products have passed, the pump body will supply air to the annular cavity formed between the annular sleeve and the stratification rod. The annular sleeve will expand after being inflated, so that the ice formed on the surface of the annular sleeve will be automatically broken. The de-icing unit drives the de-icing part to move along the height direction of the shell through the lifting device, so that the ice at the bottom of the lower cavity is pushed and broken by the de-icing part, so that too much ice will not form inside the refrigeration device after working for a long time, which ensures the stability of the refrigeration device during operation, reduces the workload of de-icing in the later stage, and at the same time ensures the refrigeration efficiency of the refrigeration device.

[0006] In order to solve the problems of the prior art, the present invention provides a spiral liquid nitrogen freezing device for aquatic products, comprising a shell; the freezing device also comprises a spiral guide rail, a layered rod and a liquid nitrogen supply device; the shell is a cylindrical structure, a support column is arranged in the shell, the support column is slidably arranged in the shell along the height direction of the shell, and the spiral guide rail is fixedly arranged on the support column along the axis of the support column; a plurality of layered rods are arranged, the layered rods are arranged above the spiral guide rail along the spiral direction of the spiral guide rail and form a spiral layer, the spiral layer divides the spiral guide rail into an upper cavity and a lower cavity, and the aquatic products slide in the upper cavity along the extension direction of the spiral guide rail after entering the spiral guide rail; the liquid nitrogen supply device is a spiral structure, the liquid nitrogen supply device is arranged on the side wall of the spiral guide rail along the extension direction of the spiral guide rail, and the liquid nitrogen supply device supplies liquid nitrogen into the spiral guide rail.

[0007] Preferably, a heating plate is provided at the bottom of the lower cavity of the spiral guide rail.

[0008] Preferably, the refrigeration device also includes an annular sleeve and a pump body; the annular sleeve is sleeved on the periphery of the stratified rod along the axis of the stratified rod, the annular sleeve is made of elastic material, and an annular cavity is present between the annular sleeve and the stratified rod; the pump body is arranged on the top of the outer shell, and the pump body is communicated with the annular cavity.

[0009] Preferably, the refrigeration device further comprises detectors, which are evenly arranged on the side walls of the support columns along the height direction of the shell.

[0010] Preferably, the detector divides the spiral guide rail into equidistant spiral structures, and all the layered rods located in the equidistant spiral structure sections are grouped together and are provided with switch valves, the number of switch valves corresponds one to one with the number of groups of layered rods, and a controller is provided on the outer casing, and the detector controls the opening of the switch valve through the controller.

[0011] Preferably, the refrigeration device further comprises a deicing unit, which is arranged at the bottom of the lower cavity of the spiral guide rail, and the deicing unit is slidably matched with the spiral guide rail along the height direction of the shell.

[0012] Preferably, the deicing unit includes a deicing component and a lifting device; the deicing component is a spiral structure, and the deicing component is slidably set at the bottom of the lower cavity of the threaded guide rail along the height direction of the shell; the lifting device is set below the deicing component, and the lifting device drives the deicing component to move.

[0013] Preferably, the deicing unit also includes a weight testing unit, which is arranged below the support column and moves along the height direction of the shell. When the weight testing unit rises along the height direction of the shell, it supports the bottom of the support column and detects the weight value.

[0014] Preferably, the deicing unit also includes a receiving ring, which is fixedly arranged on the inner wall of the shell along the axis of the shell. After the lifting device is started, the upper end face of the weight testing unit descends below the receiving ring, and the receiving ring receives the bottom of the support column.

[0015] Preferably, the refrigeration device further comprises a separation unit, which comprises a guide frame and a guide shell; the guide frame is arranged on the output end of the spiral guide rail, and a drop groove is provided on the guide frame; the guide shell is arranged at the lower part of the guide frame, and the guide shell is used to collect crushed ice.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention is provided with a spiral guide rail, a layered rod and a liquid nitrogen supply device. When in use, the aquatic product is placed into the spiral guide rail from the input end of the spiral guide rail, and the aquatic product on the spiral guide rail is supported by the layered rod. Since the arrangement of the layered rod is also a spiral structure, and the liquid nitrogen supply device is provided on the side wall of the spiral guide rail, the aquatic product gradually descends along the extension direction of the spiral guide rail under the support of the layered rod, and the liquid nitrogen supply device supplies liquid nitrogen to the upper cavity and the lower cavity respectively, so that both sides of the aquatic product sliding on the layered rod can be evenly cooled, so that the aquatic product can be quickly frozen. During the freezing process, the aquatic product itself carries moisture, so the spiral structure The automatic de-icing function can be realized on the structure and the stratification rod. The detector is used to detect whether the aquatic products have passed. If the aquatic products have passed, the pump body will supply air to the annular cavity formed between the annular sleeve and the stratification rod. The annular sleeve will expand after being inflated, so that the ice formed on the surface of the annular sleeve will be automatically broken. The de-icing unit drives the de-icing part to move along the height direction of the shell through the lifting device, so that the ice at the bottom of the lower cavity is pushed and broken by the de-icing part, so that too much ice will not form inside the refrigeration device after working for a long time, which ensures the stability of the refrigeration device during operation, reduces the workload of de-icing in the later stage, and at the same time ensures the refrigeration efficiency of the refrigeration device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of a spiral liquid nitrogen freezing device for aquatic products.

[0019] Figure 2 A three-dimensional diagram of a spiral liquid nitrogen freezing device for aquaculture with the outer shell removed Figure 1 .

[0020] Figure 3 It is a spiral liquid nitrogen freezing device for aquatic products. Figure 2 A local enlarged schematic diagram of point A in the middle.

[0021] Figure 4 It is a side view of an aquatic spiral liquid nitrogen freezing device with the outer shell removed.

[0022] Figure 5 It is a spiral liquid nitrogen freezing device for aquatic products. Figure 4 Schematic cross-sectional view at the middle BB.

[0023] Figure 6 It is a spiral liquid nitrogen freezing device for aquatic products. Figure 5 A partial enlarged schematic diagram of point C in the middle.

[0024] Figure 7 It is a spiral liquid nitrogen freezing device for aquatic products. Figure 5 A partial enlarged schematic diagram of point D in the middle.

[0025] Figure 8A three-dimensional diagram of a spiral liquid nitrogen freezing device for aquaculture with the outer shell removed Figure 2 .

[0026] Fig. 9 The present invention is a three-dimensional schematic diagram of a lifting device of a spiral liquid nitrogen freezing device for aquatic products.

[0027] Fig.10 The invention discloses a three-dimensional schematic diagram of a spiral liquid nitrogen freezing device for aquatic products, wherein the layered rods are provided with an annular sleeve.

[0028] The numbers in the figure are:

[0029] 1. Shell; 11. Support column; 2. Spiral guide; 3. Layered rod; 31. Annular sleeve; 32. Pump body; 33. Detector; 4. Liquid nitrogen supply device; 5. Deicing unit; 51. Deicing parts; 52. Lifting device; 521. Driving device; 5211. Rotary drive; 5212. Gear; 5213. Gear ring; 522. First rotating ring; 523. Second rotating ring; 524. Protruding block; 525. Roller; 53. Weight test unit; 531. Linear drive; 532. Support plate; 54. Receiver ring; 6. Separation unit; 61. Guide frame; 62. Guide shell. DETAILED DESCRIPTION

[0030] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] Reference Figure 1-Figure 4 : A spiral liquid nitrogen freezing device for aquatic products, comprising a shell 1; the freezing device also comprises a spiral guide rail 2, a layered rod 3 and a liquid nitrogen supply device 4; the shell 1 is a cylindrical structure, a support column 11 is arranged inside the shell 1, the support column 11 is slidably arranged inside the shell 1 along the height direction of the shell 1, and the spiral guide rail 2 is fixedly arranged on the support column 11 along the axis of the support column 11; a plurality of layered rods 3 are arranged, the layered rods 3 are arranged above the spiral guide rail 2 along the spiral direction of the spiral guide rail 2 and form a spiral layer, the spiral layer divides the spiral guide rail 2 into an upper cavity and a lower cavity, and the aquatic products slide in the upper cavity along the extension direction of the spiral guide rail 2 after entering the spiral guide rail 2; the liquid nitrogen supply device 4 is a spiral structure, the liquid nitrogen supply device 4 is arranged on the side wall of the spiral guide rail 2 along the extension direction of the spiral guide rail 2, and the liquid nitrogen supply device 4 supplies liquid nitrogen into the spiral guide rail 2.

[0032] The upper end of the spiral guide rail 2 is the input end, and the lower end of the spiral guide rail 2 is the output end. When in use, the aquatic products are put into the spiral guide rail 2 from the input end of the spiral guide rail 2, and the frozen aquatic products are discharged from the output end of the spiral guide rail 2. Since there are multiple layering rods 3, and the layering rods 3 are arranged on the spiral guide rail 2 along the extension direction of the spiral guide rail 2, the layering rods 3 arranged on the spiral guide rail 2 form a spiral layer on the spiral guide rail 2, and the spiral layer divides the spiral guide rail 2 into an upper chamber and a lower chamber. The upper chamber is used to transport the aquatic products, and the lower chamber is used to receive water droplets dripping from the aquatic products during the transportation process. In this way, too much ice will not condense on the layering rods 3, and most of the water droplets will drip into the lower chamber, thus ensuring the flatness of the spiral layer and ensuring that the aquatic products can be stably transported in the upper chamber. At the same time, there are gaps between adjacent layering rods 3, and the liquid nitrogen supplied by the liquid nitrogen supply device 4 can cool the aquatic products in the upper chamber and the lower chamber at the same time, so that the aquatic products are quickly frozen, thereby improving the freezing efficiency.

[0033] Reference Figure 4 and Figure 5 : A heating plate is arranged at the bottom of the lower cavity of the spiral guide rail 2.

[0034] By arranging a heating plate at the bottom of the lower chamber of the spiral guide rail 2, it is ensured that the liquid dripping from the aquatic product after passing through the spiral guide rail 2 will not condense at the bottom of the lower chamber of the spiral guide rail 2, so that too much ice will not accumulate at the bottom of the lower chamber of the spiral guide rail 2, thereby hindering the subsequent de-icing work. Even if some water droplets condense at the bottom of the lower chamber of the spiral guide rail 2 under the influence of liquid nitrogen supplied by the liquid nitrogen supply device 4, there will be no ice cubes firmly adhered to the bottom of the lower chamber of the spiral guide rail 2. By heating with the heating plate arranged at the bottom of the lower chamber of the spiral guide rail 2, the adhesion between the ice cubes and the bottom of the lower chamber of the spiral guide rail 2 gradually decreases, the surface of the ice cubes close to the spiral guide rail 2 begins to melt, and the friction coefficient of the ice cubes at the bottom of the lower chamber of the spiral guide rail 2 decreases rapidly, which is more conducive to the discharge of the ice cubes.

[0035] Reference Figure 6-Figure 8 and Fig.10 : The refrigeration device also includes an annular sleeve 31 and a pump body 32; the annular sleeve 31 is sleeved on the periphery of the stratified rod 3 along the axis of the stratified rod 3, the annular sleeve 31 is made of elastic material, and an annular cavity is present between the annular sleeve 31 and the stratified rod 3; the pump body 32 is arranged on the top of the outer shell 1, and the pump body 32 is communicated with the annular cavity.

[0036] During transportation, the annular sleeve 31 wrapped around the outer periphery of the layered rod 3 receives the aquatic product, that is, the layered rod 3 receives the aquatic product through the annular sleeve 31, and the annular sleeve 31 is in direct contact with the aquatic product, so that the moisture of the aquatic product will remain on the outer periphery of the annular sleeve 31. When the outer periphery of the annular sleeve 31 needs to be de-iced, the pump body 32 is started, and the pump body 32 injects gas into the annular cavity between the annular sleeve 31 and the layered rod 3. After the annular cavity is inflated, the annular sleeve 31 expands, and the annular sleeve 31 squeezes the ice layer covering its outer side, and the broken ice cubes fall into the lower cavity of the spiral guide rail 2 and are discharged from the output end of the spiral guide rail 2 under the guidance of the spiral guide rail 2.

[0037] Reference Figure 5 and Figure 6 The refrigeration device further comprises detectors 33, which are evenly arranged on the side walls of the support column 11 along the height direction of the shell 1.

[0038] The detector 33 is used to detect whether aquatic products pass through its position. When aquatic products pass through its position, the annular sleeve 31 corresponding to the stratified rod 3 above the detector 33 can be inflated and deformed by the pump body 32. After the annular sleeve 31 is deformed, the ice layer condensed on the outside of the annular sleeve 31 is broken, and then the broken ice passes through the gap of the stratified rod 3 and falls into the lower cavity, and is gradually discharged from the outer shell 1 under the guidance of the spiral guide rail 2.

[0039] Reference Figure 5 and Figure 6 : The detector 33 divides the spiral guide rail 2 into an equidistant spiral structure. All the layered rods 3 located in the equidistant spiral structure section are grouped together and are provided with switch valves. The number of switch valves corresponds one to one with the number of groups of the layered rods 3. A controller is provided on the outer shell 1, and the detector 33 controls the opening of the switch valve through the controller.

[0040] In order to ensure the freezing effect, when putting the aquatic products into the spiral guide rail 2, the aquatic products need to be put in one by one, and a pile of aquatic products cannot be put into the spiral guide rail 2 directly at one time, otherwise the freezing device cannot quickly freeze the piled aquatic products. At the same time, if the freezing device can freeze the piled aquatic products, the piled aquatic products that have been frozen are not convenient to be discharged from the output end of the spiral guide rail 2. In this way, after the aquatic products are put into the spiral guide rail 2 in turn, there are intervals between the aquatic products. The detectors 33 are evenly arranged on the support column 11 along the height direction of the shell 1, and the two adjacent ones are The spiral guide 2 is divided into equidistant spiral structures by a detector 33. Taking two adjacent detectors 33 arranged vertically as an example, the two detectors 33 are named A and B from top to bottom. Since the sliding speed of the aquatic product in the spiral guide 2 cannot be determined, the sliding condition of the aquatic product in the spiral guide 2 can be measured by the detector 33. The working principle is as follows: when the first aquatic product passes through the detector 33A, the detector 33A will detect and record it. When the aquatic product passes through the detector 33B, the detector 33B will detect the aquatic product. At this time, the detector 33B will detect the aquatic product. If the detector 33A does not detect the second aquatic product passing through, the switch valve corresponding to the spiral guide rail 2 on the detector 33A to the detector 33B section will be opened. The spiral guide rail 2 on the detector 33A to the detector 33B section described here is an equidistant thread structure. After the corresponding switch valve is opened, the pump body 32 is started, and the pump body 32 fills the gas into the annular cavity in the equidistant thread structure section through the switch valve. The annular cavity refers to the annular cavity formed by the layered rod 3 and the annular sleeve 31. At this time, the refrigeration device is in operation. When the pump body 32 is turned on, the pump body 32 can still selectively de-ice some sections of the annular sleeve 31, thereby improving efficiency and extending the shutdown de-icing cycle. However, if the first aquatic product is detected by the detector 33B after passing through the detector 33A, and the detector 33A detects the second aquatic product at the same time, the switch valve corresponding to the spiral guide rail 2 on the section from the detector 33A to the detector 33B is not opened. If the switch valve is opened at this time, the aquatic product received by the annular sleeve 31 will slip out of the spiral guide rail 2 after the annular sleeve 31 expands.

[0041] Reference Figure 4 The refrigeration device further comprises a deicing unit 5, which is arranged at the bottom of the lower chamber of the spiral guide rail 2, and the deicing unit 5 is slidably matched with the spiral guide rail 2 along the height direction of the shell 1.

[0042] Reference Figure 4 , Figure 7-Figure 9 The deicing unit 5 includes a deicing component 51 and a lifting device 52; the deicing component 51 is a spiral structure, and the deicing component 51 is slidably set at the bottom of the lower cavity of the threaded guide rail along the height direction of the shell 1; the lifting device 52 is set below the deicing component 51, and the lifting device 52 drives the deicing component 51 to move.

[0043] The lifting device 52 includes a driving device 521, a first rotating ring 522, a second rotating ring 523, a protruding block 524 and a roller 525. The first rotating ring 522 is slidably arranged in the housing 1 along the axis of the support column 11. The first rotating ring 522 surrounds the periphery of the support column 11. A plurality of rollers 525 are provided. The rollers 525 are evenly arranged at the bottom of the first rotating ring 522 around the axis of the first rotating ring 522. The rollers 525 are rotatably arranged at the bottom of the first rotating ring 522. The upper part of the first rotating ring 522 is fixedly connected to the deicing member 51. The second rotating ring 523 is rotatably arranged below the first rotating ring 522 along the axis of the first rotating ring 522. A plurality of protruding blocks 524 are provided. The protruding blocks 524 surround the second rotating ring 5 The axis of 23 is fixedly arranged on the upper part of the second rotating ring 523, and the driving device 521 is arranged on one side of the second rotating ring 523. The driving device 521 is used to drive the second rotating ring 523 to rotate. After the driving device 521 drives the second rotating ring 523 to rotate, the second rotating ring 523 drives the protruding block 524 to rotate, so that the roller 525 arranged at the bottom of the first rotating ring 522 is lifted up by the rotating protruding block 524. Since the first rotating ring 522 is fixedly connected to the deicing member 51, when the first rotating ring 522 is lifted up, the deicing member 51 is also lifted up synchronously, so that the deicing member 51 can move along the height direction of the shell 1. When the deicing member 51 is not lifted up, the upper spiral end face of the spiral deicing member is aligned with the spiral guide rail 2. The bottom end faces of the lower chamber overlap. When deicing is required, the second rotating ring 523 rotates so that the protruding block 524 lifts the roller 525, and the deicing member 51 extends from the bottom of the lower chamber of the spiral guide rail 2. It is worth noting that when the deicing member 51 is fully extended, the upper spiral end face of the deicing member 51 will not exceed the stratification rod 3, that is, when the deicing member 51 is lifted to the highest point, the deicing member 51 is still located in the lower chamber. When the second rotating ring 523 drives the protruding block 524 to completely pass the roller 525, the first rotating ring 522 falls. The vibration generated when the first rotating ring 522 falls can shake off the residual ice adhering to the upper spiral end face of the deicing member 51. The driving device 521 includes a rotary driver 5211, a gear 5212 and a gear ring 5213. The gear ring 5213 is fixedly arranged on the periphery of the second rotating ring 523 along the axis of the second rotating ring 523, the gear 5212 is rotatably arranged on one side of the gear ring 5213 along the axis of the gear ring 5213, the gear ring 5213 and the gear 5212 are meshed with each other, the rotation driver 5211 is arranged at the end of the gear 5212, the rotation driver 5211 drives the gear 5212 to rotate, the rotation driver 5211 is preferably a servo motor, when the rotation driver 5211 is started, the rotation driver 5211 drives the gear ring 5213 to rotate through the gear 5212, because the gear ring 5213 is fixedly connected to the second rotating ring 523, the second rotating ring 523 can rotate normally, it is worth noting that the first rotating plate cannot rotate around its own axis,The first rotating plate can only move along the height direction of the housing 1.

[0044] Reference Figure 5 The de-icing unit 5 also includes a weight testing unit 53, which is moved along the height direction of the shell 1 and is arranged below the support column 11. When the weight testing unit 53 rises along the height direction of the shell 1, it supports the bottom of the support column 11 and detects the weight value.

[0045] The weight testing unit 53 includes a linear drive 531 and a support plate 532. The linear drive 531 is arranged below the support column 11 along the height direction of the housing 1. The output end of the linear drive 531 is vertically upward. The support plate 532 is horizontally fixed on the output end of the linear drive 531. The pressure sensor is arranged on the support plate 532. The linear drive 531 is preferably a linear cylinder. Before the refrigeration device works, the linear drive 531 is pre-started. The linear drive 531 drives the support plate 532 to rise and support the bottom of the support column 11. During the process of the support plate 532 supporting the support column 11, the linear drive 531 is driven by the support plate 532. In the process, the pressure monitored by the pressure sensor arranged on the support plate 532 gradually increases. The pressure sensor is used to monitor the change of the pressure value. When the pressure sensor detects that the pressure value no longer changes, the linear drive 531 stops running. Then the aquatic product is put into the spiral guide rail 2 from the input end of the spiral guide rail 2. The pressure sensor is set with a maximum pressure value. With the operation of the refrigeration device, the amount of ice on the spiral guide rail 2 gradually increases, so the pressure monitored by the pressure sensor also gradually increases. When the pressure value monitored by the pressure sensor reaches the maximum pressure value, the linear drive 531 drives the support plate 532 to descend.

[0046] Reference Figure 5 The de-icing unit 5 also includes a receiving ring 54, which is fixedly arranged on the inner wall of the outer shell 1 along the axis of the outer shell 1. After the lifting device 52 is started, the upper end surface of the weight testing unit 53 drops below the receiving ring 54, and the receiving ring 54 receives the bottom of the support column 11.

[0047] When the pressure value monitored by the pressure sensor reaches the maximum pressure value, the linear drive 531 drives the support plate 532 to descend to below the receiving ring 54, and then the lifting device 52 is started. The lifting device 52 drives the deicing component 51 to rise and fall along the height direction of the outer shell 1 to de-ice. Due to the vibration involved in de-icing, the support plate 532 is withdrawn from the bottom of the support column 11 and then received by the receiving ring 54 to ensure that the vibration during de-icing will not affect the pressure sensor, thereby reducing the life of the pressure sensor.

[0048] Reference Figure 2: The refrigeration device also includes a separation unit 6, which includes a guide frame 61 and a guide shell 62; the guide frame 61 is arranged on the output end of the spiral guide rail 2, and a drop groove is opened on the guide frame 61; the guide shell 62 is arranged at the lower part of the guide frame 61, and the guide shell 62 is used to collect crushed ice.

[0049] Since the spiral guide rail 2 is divided into an upper chamber and a lower chamber under the stratification of the stratification rod 3, after the aquatic products enter the spiral guide rail 2, they slide in the upper chamber along the extension direction of the spiral guide rail 2. At this time, the stratification rod 3 receives the aquatic products, and the crushed ice broken by the de-icing unit 5 is discharged from the lower chamber in the spiral guide rail 2. The discharged crushed ice falls into the guide shell 62 from the falling groove of the guide frame 61. A collection box is provided on one side of the output end of the guide shell 62. Under the guidance of the guide shell 62, the crushed ice falls into the collection box. A belt conveyor is provided on the side of the guide frame 61 away from the spiral guide rail 2. After the aquatic products are frozen, they slide from the guide frame 61 into the belt conveyor, and the belt conveyor outputs the frozen aquatic products.

[0050] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A spiral liquid nitrogen freezing device for aquatic products, comprising a housing (1); It is characterized in that The freezing device also includes a spiral guide rail (2), a layered rod (3) and a liquid nitrogen supply device (4); The outer shell (1) is a cylindrical structure, a support column (11) is arranged inside the outer shell (1), the support column (11) is slidably arranged inside the outer shell (1) along the height direction of the outer shell (1), and the spiral guide rail (2) is fixedly arranged on the support column (11) along the axis of the support column (11); A plurality of layered rods (3) are provided, and the layered rods (3) are arranged above the spiral guide rail (2) along the spiral direction of the spiral guide rail (2) to form a spiral layer, and the spiral layer divides the spiral guide rail (2) into an upper cavity and a lower cavity, and after the aquatic product enters the spiral guide rail (2), it slides in the upper cavity along the extension direction of the spiral guide rail (2); The liquid nitrogen supply device (4) has a spiral structure and is arranged on the side wall of the spiral guide rail (2) along the extension direction of the spiral guide rail (2). The liquid nitrogen supply device (4) supplies liquid nitrogen into the spiral guide rail (2).

2. The aquatic spiral liquid nitrogen freezing device according to claim 1, characterized in that: A heating plate is arranged at the bottom of the lower cavity of the spiral guide rail (2).

3. The aquatic spiral liquid nitrogen freezing device according to claim 1, characterized in that: The refrigeration device also includes an annular sleeve (31) and a pump body (32); The annular sleeve (31) is sleeved on the outer periphery of the layered rod (3) along the axis of the layered rod (3); the annular sleeve (31) is made of elastic material; and an annular cavity is present between the annular sleeve (31) and the layered rod (3); The pump body (32) is arranged on the top of the housing (1), and the pump body (32) is communicated with the annular cavity.

4. The aquatic spiral liquid nitrogen freezing device according to claim 3 is characterized in that: The refrigeration device further comprises detectors (33), which are evenly arranged on the side walls of the support columns (11) along the height direction of the housing (1).

5. The aquatic spiral liquid nitrogen freezing device according to claim 4, characterized in that: The detector (33) divides the spiral guide rail (2) into equidistant spiral structures. All layered rods (3) located in the equidistant spiral structure sections are grouped together and provided with switch valves. The number of switch valves corresponds to the number of groups of layered rods (3). A controller is provided on the housing (1). The detector (33) controls the opening of the switch valves through the controller.

6. The aquatic spiral liquid nitrogen freezing device according to claim 1, characterized in that: The refrigeration device further comprises a deicing unit (5), which is arranged at the bottom of the lower chamber of the spiral guide rail (2), and the deicing unit (5) is slidably matched with the spiral guide rail (2) along the height direction of the shell (1).

7. The aquatic spiral liquid nitrogen freezing device according to claim 6, characterized in that: The deicing unit (5) comprises a deicing component (51) and a lifting device (52); The deicing member (51) is a spiral structure, and the deicing member (51) is slidably disposed on the bottom of the lower cavity of the threaded guide rail through the height direction of the housing (1); The lifting device (52) is arranged below the deicing component (51), and the lifting device (52) drives the deicing component (51) to move.

8. The aquatic spiral liquid nitrogen freezing device according to claim 7, characterized in that: The deicing unit (5) further comprises a weight testing unit (53), which is arranged below the support column (11) and moves along the height direction of the housing (1). When the weight testing unit (53) rises along the height direction of the housing (1), it receives the bottom of the support column (11) and detects the weight value.

9. The aquatic spiral liquid nitrogen freezing device according to claim 8, characterized in that: The deicing unit (5) further comprises a receiving ring (54), which is fixedly arranged on the inner wall of the outer shell (1) along the axis of the outer shell (1). After the lifting device (52) is started, the upper end surface of the weight testing unit (53) descends below the receiving ring (54), and the receiving ring (54) receives the bottom of the support column (11).

10. The aquatic spiral liquid nitrogen freezing device according to claim 1, characterized in that: The freezing device further comprises a separation unit (6), wherein the separation unit (6) comprises a guide frame (61) and a guide shell (62); The guide frame (61) is arranged on the output end of the spiral guide rail (2), and a drop groove is provided on the guide frame (61); The guide shell (62) is arranged at the lower part of the guide frame (61), and the guide shell (62) is used to collect crushed ice.

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