Low-temperature dipping quick-freezing water-retaining and fresh-keeping device for crayfish

Abstract

The invention discloses a low-temperature dipping quick-freezing water-retaining fresh-keeping device for crayfish, and relates to the technical field of aquatic product fresh-keeping, the device comprises a quick-freezing fresh-keeping box, a low-temperature constant-temperature inverter and a draining assembly, quick-freezing holes are formed in the upper surface of the quick-freezing fresh-keeping box, the low-temperature constant-temperature inverter is arranged on the upper surface of the quick-freezing fresh-keeping box, and the draining assembly is arranged on the lower surface of the quick-freezing fresh-keeping box. A water outlet is formed in the side wall of the quick-freezing fresh-keeping box, a fixing plate is fixedly connected to the inner side wall of a quick-freezing hole of the quick-freezing fresh-keeping box, a motor is arranged on the inner side wall of the quick-freezing hole of the quick-freezing fresh-keeping box, fan blades are arranged on the upper surface of the fixing plate, and the motor is connected with the fan blades through a magnetic coupler. And an anti-sputtering coaming is arranged at the opening of the quick-freezing hole of the quick-freezing fresh-keeping box. Through the draining assembly and the vibration structure, the draining efficiency of the crayfishes is improved, the influence of the room temperature on the crayfishes which are just quickly frozen during draining is reduced, and the packaging waiting time of the crayfishes is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of aquatic product preservation, in particular to a low-temperature immersion quick-freezing water preservation and freshness preservation device for crayfish. Background Art

[0002] Crayfish is a kind of aquatic species with high economic and nutritional value. However, due to the obvious seasonality of crayfish supply and its high water and protein content, the crayfish are put on the market too concentratedly, and are easily used by microorganisms and spoiled, resulting in a large amount of resource waste and serious environmental pollution. An important issue facing the aquatic processing industry is the preservation and processing of crayfish;

[0003] At present, common storage methods, such as irradiation, refrigeration, partial freezing, and frozen storage, can effectively extend the shelf life of aquatic products to varying degrees. However, the irradiation storage process promotes the oxidation and decomposition of proteins in crayfish; during the freezing process, especially the initial processing, it is very easy to be damaged by ice crystals produced during freezing, resulting in protein denaturation, internal tissue fibrosis, dry meat, rough taste, decreased water holding capacity and other quality deterioration, which seriously affects its edible quality and commodity value;

[0004] Therefore, Changcheng now uses a low-temperature constant temperature reactor to immerse and quick-freeze crayfish. Immersion quick freezing refers to the direct contact between the frozen raw materials and the refrigerant. After the frozen materials exchange heat with the refrigerant, they are quickly cooled and frozen. It is a new and efficient quick-freezing processing technology. Compared with traditional freezing methods, immersion quick freezing technology has the following advantages: fast freezing speed, short time, and high-quality products; low energy consumption, reduced equipment investment, high thermal conductivity of the freezing medium in immersion quick freezing, high heat transfer efficiency, no need to maintain a high flow rate of cold air, compared with air freezing and liquid nitrogen low-temperature freezing, the cost is the lowest; it can achieve single-unit quick freezing, and the individual food can be better separated during the immersion quick freezing process.

[0005] However, the existing devices for quick-freezing crayfish by immersion have the following problems during use: after the crayfish are immersed and quick-frozen, they need to be drained to drain the coolant. It takes a certain amount of time to drain the water naturally before the crayfish can be packaged and frozen for storage. The draining time is relatively long, which affects the quality of the crayfish that has just been quick-frozen on the one hand, and the drainage efficiency is low on the other hand, which affects the subsequent packaging operation.

[0006] Based on this, a low-temperature immersion quick-freezing water-preserving and fresh-keeping device for crayfish is now provided, which can eliminate the disadvantages of the existing devices. Summary of the invention

[0007] The object of the present invention is to provide a low-temperature immersion quick-freezing water-preserving and fresh-keeping device for crayfish, so as to solve the shortcomings of the modern product in the background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A low-temperature immersion quick-freezing water-preserving and fresh-keeping device for crayfish, comprising a quick-freezing fresh-keeping box, a low-temperature constant-temperature reactor, and a drain assembly, wherein a quick-freezing hole is opened on the upper surface of the quick-freezing fresh-keeping box, a low-temperature constant-temperature reactor is arranged on the upper surface of the quick-freezing fresh-keeping box, a drain outlet is arranged on the side wall of the quick-freezing fresh-keeping box, a fixing plate is fixedly connected to the inner side wall of the quick-freezing hole of the quick-freezing fresh-keeping box, a motor is arranged on the inner side wall of the quick-freezing hole of the quick-freezing fresh-keeping box, a fan blade is arranged on the upper surface of the fixing plate, the motor and the fan blade are connected through a magnetic coupler, and an anti-splashing enclosure is arranged at the opening of the quick-freezing hole of the quick-freezing fresh-keeping box;

[0010] The drain assembly includes an electric push rod and a connecting frame, the upper surface of the quick-freezing fresh-keeping box is provided with two symmetrical electric push rod holes, the inner side walls of the electric push rod holes are fixedly connected to the electric push rods, the output end of the electric push rods is fixedly connected to the connecting frame, the two connecting frames are commonly fixedly connected to a fixing ring, the side wall of the fixing ring is provided with a second rotating ring groove, the inner side wall of the second rotating ring groove is connected to a second rotating ring through a bearing, the side wall of the second rotating ring is provided with a limiting ring groove, a limiting ring is placed in the limiting ring groove, a discharge barrel is placed in the limiting ring, a plurality of holes are provided on the side wall of the discharge barrel, and two symmetrical handles are fixedly connected to the upper surface of the discharge barrel;

[0011] A vibration component is arranged inside the drainage component to further improve the drainage efficiency.

[0012] On the basis of the above technical solution, the present invention also provides the following optional technical solution:

[0013] In an optional scheme: a plurality of fixed rods are fixedly connected to the lower surface of the second rotating ring, and the lower surfaces of the plurality of fixed rods are commonly fixedly connected to the first rotating ring; a plurality of lifting rods are fixedly connected to the lower surface of the limiting ring; the fixed rods are provided with lifting rod grooves, and the lifting rods pass through the second rotating ring and are slidably connected to the inner side wall of the lifting rod groove; a plurality of key block grooves are provided on the side wall of the limiting ring; a plurality of key blocks are fixedly connected to the side wall of the discharge barrel, and the key blocks are slidably connected to the inner side wall of the key block groove; a guide block is rotatably connected to the circumferential side of the first rotating ring through a pin shaft; a baffle is fixedly connected to the circumferential side of the first rotating ring, and the guide block abuts against the baffle; a spiral groove is provided on the inner side wall of the quick freezing hole of the quick freezing preservation box, and the guide block is slidably connected to the inner side wall of the spiral groove.

[0014] In an optional solution: the side wall of the guide block is provided with a ball.

[0015] In an optional solution: magnets are provided on the lower surface of the key block and the upper surface of the key block slot.

[0016] In an optional solution: the vibration assembly includes a lower protrusion and an upper protrusion, a plurality of lower protrusions are fixedly connected to the upper surface of the limiting ring, a plurality of upper protrusions are arranged on the inner side wall of the second rotating ring groove of the fixed ring, the lower protrusions abut against the upper protrusions, and a spring is fixedly connected to the lifting rod and the inner side wall of the lifting rod groove.

[0017] In an optional solution: a block groove is provided on the side wall of the key block, a block is slidably connected to the inner wall of the block groove, a spring is fixedly connected between the block and the inner wall of the block groove, and a connecting groove corresponding to the block is provided on the inner wall of the key block groove of the limiting ring, and the connecting groove is connected to the block.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention uses a draining component to rotate the discharge barrel to drive the crayfish in the discharge barrel to rotate and drain. Under the action of centrifugal force, the separation of the coolant on the surface of the crayfish is accelerated, the draining time of the crayfish is reduced, the influence of the room temperature on the crayfish that has just been quick-frozen during the draining is reduced, the waiting time for the crayfish to be packaged is reduced, and the drainage efficiency of the crayfish is improved.

[0020] 2. The present invention uses a vibration structure so that the limit ring drives the discharge barrel to vibrate up and down, and the discharge barrel drives the crayfish inside to shake, so that the coolant on the surface of the crayfish is further quickly separated, further improving the drainage speed of the crayfish. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is a schematic diagram of the working state of the present invention.

[0023] Figure 3 It is a schematic diagram of the structure of the drain assembly of the present invention.

[0024] Figure 4 It is a cross-sectional view of the internal structure of the quick-freezing fresh-keeping box of the present invention.

[0025] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle.

[0026] Figure 6 For the present invention Figure 4 Enlarged view of point B in the middle.

[0027] Figure 7 For the present invention Figure 4 Enlarged view of center C.

[0028] Notes on the accompanying drawings: 1. quick-freezing fresh-keeping box; 2. low-temperature constant temperature reactor; 3. electric push rod; 4. connecting frame; 5. drain outlet; 6. anti-splashing enclosure; 7. fixing ring; 8. limiting ring; 9. discharge barrel; 10. key block; 11. lower protrusion; 12. upper protrusion; 13. handle; 14. first rotating ring; 15. fixing rod; 17. guide block; 18. baffle; 19. clamping block; 20. magnet; 21. clamping groove; 22. second rotating ring; 23. lifting rod; 24. ball bearing; 25. spiral groove; 26. fan blade; 27. motor; 28. fixing plate; 29. ​​magnetic coupler; 30. drain assembly; 31. vibration structure. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] In one embodiment, Figure 1-Figure 7 As shown, a low-temperature immersion quick-freezing water-preserving and fresh-keeping device for crayfish comprises a quick-freezing fresh-keeping box 1, a low-temperature constant-temperature reactor 2, and a drain assembly 30. The quick-freezing fresh-keeping box 1 is provided with a quick-freezing hole on its upper surface, the quick-freezing fresh-keeping box 1 is provided with a low-temperature constant-temperature reactor 2 on its upper surface, a drain port 5 is provided on the side wall of the quick-freezing fresh-keeping box 1, a fixing plate 28 is fixedly connected to the inner side wall of the quick-freezing hole of the quick-freezing fresh-keeping box 1, a motor 27 is provided on the inner side wall of the quick-freezing hole of the quick-freezing fresh-keeping box 1, a fan blade 26 is provided on the upper surface of the fixing plate 28, the motor 27 is connected to the fan blade 26 via a magnetic coupler 29, and an anti-splashing enclosure 6 is provided at the opening of the quick-freezing hole of the quick-freezing fresh-keeping box 1;

[0031] The drain assembly 30 includes an electric push rod 3 and a connecting frame 4. The upper surface of the quick-freezing fresh-keeping box 1 is provided with two symmetrical electric push rod holes, the inner side wall of the electric push rod hole is fixedly connected to the electric push rod 3, the output end of the electric push rod 3 is fixedly connected to the connecting frame 4, and the two connecting frames 4 are commonly fixedly connected to a fixing ring 7, the side wall of the fixing ring 7 is provided with a second rotating ring groove, the inner side wall of the second rotating ring groove is connected to a second rotating ring 22 through a bearing, the side wall of the second rotating ring 22 is provided with a limiting ring groove, a limiting ring 8 is placed in the limiting ring groove, a discharge barrel 9 is placed in the limiting ring 8, a plurality of holes are provided on the side wall of the discharge barrel 9, and two symmetrical handles 13 are fixedly connected to the upper surface of the discharge barrel 9;

[0032] The drainage component 30 is provided with a vibration component 31 to further improve the drainage efficiency.

[0033] The low temperature constant temperature reactor 2 and the electric push rod 3 are started, the electric push rod 3 drives the connecting frame 4 to descend, the connecting frame 4 drives the fixing ring 7 to descend, and the fixing ring 7 drives the discharge barrel 9 to descend, so that the crayfish in the discharge barrel 9 are immersed in the coolant for quick freezing;

[0034] The motor 27 is started, and the motor 27 drives the fan blades 26 to rotate through the magnetic coupling 29. The rotation of the fan blades 26 drives the coolant in the quick-freezing hole to flow, so that the crayfish can fully contact the coolant and be quickly frozen.

[0035] In an optional embodiment, a plurality of fixed rods 15 are fixedly connected to the lower surface of the second rotating ring 22, and the lower surfaces of the plurality of fixed rods 15 are commonly fixedly connected to the first rotating ring 14; a plurality of lifting rods 23 are fixedly connected to the lower surface of the limiting ring 8; the fixed rods 15 are provided with lifting rod grooves; the lifting rods 23 penetrate through the second rotating ring 22 and are slidably connected to the inner side wall of the lifting rod groove; a plurality of key block grooves are provided on the side wall of the limiting ring 8; a plurality of key blocks 10 are fixedly connected to the side wall of the discharge barrel 9; the key blocks 10 are slidably connected to the inner side wall of the key block groove; a guide block 17 is rotatably connected to the circumference of the first rotating ring 14 through a pin shaft; a baffle 18 is fixedly connected to the circumference of the first rotating ring 14; the guide block 17 abuts against the baffle 18; a spiral groove 25 is provided on the inner side wall of the quick freezing hole of the quick freezing preservation box 1; the guide block 17 is slidably connected to the inner side wall of the spiral groove 25.

[0036] After the crayfish is frozen, the motor 27 is turned off and the electric push rod 3 is started. The electric push rod 3 drives the discharge barrel 9 to rise. During the rising process, the guide block 17 rotates under the action of water resistance. Due to the obstruction of the baffle 18, the angle between the guide block 17 and the first rotating ring 14 is ninety degrees. During the rising process, the guide block 17 is stuck in the spiral groove 25, and cooperates with the spiral groove 25 for guidance, driving the first rotating ring 14 to rotate. The first rotating ring 14 drives the fixed rod 15 to rotate, and the fixed rod 15 drives the second rotating ring 22 to rotate. The second rotating ring 22 drives the limit ring 8 to rotate by cooperating with the lifting rod 23. The limit ring 8 drives the discharge barrel 9 to rotate by cooperating with the key block 10. The rotation of the discharge barrel 9 drives the crayfish in the discharge barrel 9 to rotate and drain. Under the action of centrifugal force, the separation of the coolant on the surface of the crayfish is accelerated, the time for crayfish to drain is reduced, the influence of room temperature on the crayfish that has just been quick-frozen during drainage is reduced, the time for crayfish to wait for packaging is reduced, and the drainage efficiency of crayfish is improved.

[0037] In an optional embodiment, a ball bearing 24 is disposed on the side wall of the guide block 17 .

[0038] Reduce the friction between the guide block 17 and the inner wall of the spiral groove 25.

[0039] In an optional embodiment, magnets 20 are disposed on the lower surface of the key block 10 and the upper surface of the key block slot.

[0040] Through the cooperation of the two magnets 20 , the discharge barrel 9 can be fixed in the limiting ring 8 .

[0041] In an optional embodiment, the vibration assembly 31 includes a lower protrusion 11 and an upper protrusion 12, a plurality of lower protrusions 11 are fixedly connected to the upper surface of the limiting ring 8, a plurality of upper protrusions 12 are provided on the inner side wall of the second rotating ring groove of the fixing ring 7, the lower protrusions 11 are abutted against the upper protrusions 12, and the lifting rod 23 is fixedly connected to the inner side wall of the lifting rod groove with a spring.

[0042] As the limiting ring 8 rises and rotates, the lower protrusion 11 on the upper surface of the limiting ring 8 cooperates with the upper protrusion 12 of the fixing ring 7, and under the action of the lifting rod 23 and the spring, the limiting ring 8 vibrates up and down while rotating, and the limiting ring 8 drives the discharge barrel 9 to vibrate up and down, and the discharge barrel 9 drives the crayfish inside to shake, so that the coolant on the surface of the crayfish can be further quickly separated, thereby further improving the drainage speed of the crayfish.

[0043] In an optional embodiment, a block groove is provided on the side wall of the key block 10, a block 19 is slidably connected to the inner wall of the block groove, a spring is fixedly connected between the block 19 and the inner wall of the block groove, and a connecting groove 21 corresponding to the block 19 is provided on the inner wall of the key block groove of the limiting ring 8, and the connecting groove 21 is connected to the block 19.

[0044] As the limit ring 8 rotates, the clamping block 19 enters the clamping groove 21 under the action of centrifugal force, and limits the key block 10 up and down to prevent the magnetic force between the two magnets 20 from being insufficient during the vibration drainage process, causing the discharge barrel 9 to fly out of the limit ring 8 and affecting the effect of the vibration drainage.

[0045] The above embodiment discloses a low-temperature immersion quick-freezing water-retaining and fresh-keeping device for crayfish, and its specific working principle and process are as follows:

[0046] S1: Select by grading, and choose live crayfish that are fresh, with intact limbs, bright color, normal smell, vitality and little weight difference, weighing 20-25g.

[0047] S2: Soak the graded and selected crayfish in an aqueous solution containing 0.5% salt, 0.2% sodium D-isoascorbate, 0.5% sodium bicarbonate, 0.5% citric acid, etc. for 90 minutes to allow the shrimp to spit out the dirt in the gills and intestinal glands, and then wash them clean with clean water.

[0048] S3: First, place the cleaned crayfish under low temperature dormancy treatment at 0-4℃, then remove the shrimp heads and keep the shrimp tails.

[0049] S4: Put the processed and cleaned crayfish into the discharge barrel 9, place the discharge barrel 9 in the limiting ring 8, and let the key block 10 be located in the key block groove of the limiting ring 8;

[0050] Through the cooperation of the two magnets 20, the discharge barrel 9 can be fixed in the limiting ring 8;

[0051] S5: pouring a certain amount of coolant into the quick freezing hole of the quick freezing fresh-keeping box 1;

[0052] S6: Start the low-temperature thermostat reactor 2 and the electric push rod 3, the electric push rod 3 drives the connecting frame 4 to descend, the connecting frame 4 drives the fixing ring 7 to descend, and the fixing ring 7 drives the discharge barrel 9 to descend, so that the crayfish in the discharge barrel 9 are immersed in the coolant for quick freezing;

[0053] The low temperature constant temperature reactor 2 keeps the coolant within a certain temperature range;

[0054] The descent of the fixed ring 7 drives the limit ring 8 to descend, the descent of the limit ring 8 drives the fixed rod 15 to descend, the descent of the fixed rod 15 drives the first rotating ring 14 to descend, the first rotating ring 14 drives the guide block 17 to descend, and the guide block 17 rotates under the action of water resistance and does not contact the spiral groove 25, so that the discharge barrel 9 can smoothly descend into the coolant.

[0055] S7: Start the motor 27, which drives the fan blades 26 to rotate through the magnetic coupler 29. The rotation of the fan blades 26 drives the coolant in the quick-freezing hole to flow, so that the crayfish can fully contact the coolant and be quickly frozen;

[0056] The coolant composition is: 50% water + 5% calcium chloride + 20% glycerin + 3% salt + 2% sorbitol + 10% propylene glycol + 10% glycerol;

[0057] S8: After the crayfish is frozen, the motor 27 is turned off, and the electric push rod 3 is started. The electric push rod 3 drives the discharge barrel 9 to rise. During the rising process, the guide block 17 rotates under the action of water resistance. Due to the obstruction of the baffle 18, the angle between the guide block 17 and the first rotating ring 14 is ninety degrees. During the rising process, the guide block 17 is stuck in the spiral groove 25, and cooperates with the spiral groove 25 for guidance, driving the first rotating ring 14 to rotate, the first rotating ring 14 drives the fixed rod 15 to rotate, and the fixed rod 15 drives the second rotating ring 22 to rotate. The second rotating ring 22 drives the limit ring 8 to rotate by cooperating with the lifting rod 23, and the limit ring 8 drives the discharge barrel 9 to rotate by cooperating with the key block 10. The rotation of the discharge barrel 9 drives the crayfish in the discharge barrel 9 to rotate and drain. Under the action of centrifugal force, the coolant on the surface of the crayfish is accelerated to separate, the time for the crayfish to drain is reduced, the influence of the room temperature on the crayfish that has just been quickly frozen during the draining is reduced, the time for the crayfish to wait for packaging is reduced, and the drainage efficiency of the crayfish is improved;

[0058] When the limiting ring 8 is rising and rotating, the lower protrusion 11 on the upper surface of the limiting ring 8 cooperates with the upper protrusion 12 of the fixing ring 7, and then under the action of the lifting rod 23 and the spring, the limiting ring 8 vibrates up and down while rotating, and the limiting ring 8 drives the discharge barrel 9 to vibrate up and down, and the discharge barrel 9 drives the crayfish inside to shake, so that the coolant on the surface of the crayfish is further quickly separated, and the drainage speed of the crayfish is further improved;

[0059] When the limit ring 8 rotates, the clamping block 19 enters the clamping groove 21 under the action of centrifugal force, and limits the key block 10 up and down to avoid that the magnetic force between the two magnets 20 is not strong enough during the vibration drainage process, causing the discharge barrel 9 to fly out of the limit ring 8, thereby affecting the effect of vibration drainage;

[0060] S9: When the discharge barrel 9 rises to the highest point, the discharge barrel 9 can be taken out by holding the two handles 13.

[0061] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A low-temperature immersion quick-freezing and water-preserving and fresh-keeping device for crayfish, characterized in that: The quick-freezing fresh-keeping box (1) comprises a quick-freezing hole on the upper surface of the quick-freezing fresh-keeping box (1), a low-temperature constant-temperature reactor (2), and a drain assembly (30), wherein the quick-freezing fresh-keeping box (1) is provided with a quick-freezing hole, the quick-freezing fresh-keeping box (1) is provided with a low-temperature constant-temperature reactor (2), the quick-freezing fresh-keeping box (1) is provided with a drain outlet (5) on the side wall, the quick-freezing hole of the quick-freezing fresh-keeping box (1) is fixedly connected to a fixing plate (28) on the inner side wall thereof, the quick-freezing hole of the quick-freezing fresh-keeping box (1) is provided with a motor (27), the upper surface of the fixing plate (28) is provided with a fan blade (26), the motor (27) and the fan blade (26) are connected via a magnetic coupling (29), and the quick-freezing hole of the quick-freezing fresh-keeping box (1) is provided with a splash-proof enclosure (6); The drain assembly (30) comprises an electric push rod (3) and a connecting frame (4); the upper surface of the quick-freezing fresh-keeping box (1) is provided with two symmetrical electric push rod holes; the inner side wall of the electric push rod hole is fixedly connected with the electric push rod (3); the output end of the electric push rod (3) is fixedly connected with the connecting frame (4); the two connecting frames (4) are commonly fixedly connected with a fixing ring (7); the side wall of the fixing ring (7) is provided with a second rotating ring groove; the inner side wall of the second rotating ring groove is connected with a second rotating ring (22) via a bearing; the side wall of the second rotating ring (22) is provided with a limiting ring groove; a limiting ring (8) is placed in the limiting ring groove; a discharge barrel (9) is placed in the limiting ring (8); a plurality of holes are provided on the side wall of the discharge barrel (9); and two symmetrical handles (13) are fixedly connected to the upper surface of the discharge barrel (9); A vibration component (31) is arranged inside the drainage component (30) to further improve the drainage efficiency.

2. The low-temperature immersion quick-freezing water-retaining and fresh-keeping device for crayfish according to claim 1, characterized in that: The lower surface of the second rotating ring (22) is fixedly connected to a plurality of fixed rods (15), and the lower surfaces of the plurality of fixed rods (15) are commonly fixedly connected to the first rotating ring (14). The lower surface of the limiting ring (8) is fixedly connected to a plurality of lifting rods (23), and the fixed rods (15) are provided with lifting rod grooves. The lifting rods (23) penetrate the second rotating ring (22) and are slidably connected to the inner side wall of the lifting rod groove. The side wall of the limiting ring (8) is provided with a plurality of key block grooves. The discharge barrel (9) A plurality of key blocks (10) are fixedly connected to the side wall, and the key blocks (10) are slidably connected to the inner side wall of the key block groove. A guide block (17) is rotatably connected to the circumference of the first rotating ring (14) through a pin shaft. A baffle (18) is fixedly connected to the circumference of the first rotating ring (14), and the guide block (17) abuts against the baffle (18). A spiral groove (25) is provided on the inner side wall of the quick freezing hole of the quick freezing fresh-keeping box (1), and the guide block (17) is slidably connected to the inner side wall of the spiral groove (25).

3. The low-temperature immersion quick-freezing water-retaining and fresh-keeping device for crayfish according to claim 2, characterized in that: The side wall of the guide block (17) is provided with a ball (24).

4. The low-temperature immersion quick-freezing water-retaining and fresh-keeping device for crayfish according to claim 2, characterized in that: Magnets (20) are provided on the lower surface of the key block (10) and the upper surface of the key block slot.

5. The low-temperature immersion quick-freezing water-retaining and fresh-keeping device for crayfish according to claim 2, characterized in that: The vibration assembly (31) comprises a lower protrusion (11) and an upper protrusion (12); a plurality of lower protrusions (11) are fixedly connected to the upper surface of the limiting ring (8); a plurality of upper protrusions (12) are arranged on the inner side wall of the second rotating ring groove of the fixing ring (7); the lower protrusions (11) abut against the upper protrusions (12); and a spring is fixedly connected between the lifting rod (23) and the inner side wall of the lifting rod groove.

6. The low-temperature immersion quick-freezing water-retaining and fresh-keeping device for crayfish according to claim 5, characterized in that: The side wall of the key block (10) is provided with a clamping block groove, the inner wall of the clamping block groove is slidably connected with a clamping block (19), a spring is fixedly connected between the clamping block (19) and the inner wall of the clamping block groove, and the inner wall of the key block groove of the limiting ring (8) is provided with a clamping groove (21) corresponding to the clamping block (19), and the clamping groove (21) is clamped with the clamping block (19).

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