Oxidation-resistant frozen aquatic product water-retaining agent and preparation device thereof

Abstract

The invention discloses an oxidation-resistant frozen aquatic product water-retaining agent and a preparation device thereof, and relates to the technical field of aquatic product preservation, the oxidation-resistant frozen aquatic product water-retaining agent comprises a preparation mixing tank, a mixing assembly is arranged in the preparation mixing tank, a supporting frame is fixedly mounted on the outer wall of the preparation mixing tank, and three feeding hoppers are arranged at the upper end of the supporting frame; filtering assemblies are arranged below the three feeding hoppers, the mixing assembly comprises a mounting frame fixedly mounted at the upper end of the preparation mixing tank, a driving motor is fixedly mounted on the outer wall of the mounting frame, a main gear is fixedly connected to the output end of the driving motor, and a first gear and a second gear are connected to the outer wall of the main gear in a meshed mode; and a second stirring rod is fixedly mounted in the first gear. According to the water-retaining agent stirring device, the water-retaining agent can be stirred in sections during mixing, the problems of non-uniform dispersion, caking and the like of components are solved, and the uniformity of the water-retaining agent is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of aquatic product preservation technology, and in particular to an antioxidant water-retaining agent for frozen aquatic products and its preparation apparatus. Background Technology

[0002] Freezing is one of the most common methods for storing, transporting, and selling aquatic products. It can effectively inhibit the growth of microorganisms and extend the shelf life of aquatic products. However, during freezing and thawing, aquatic products are prone to problems such as moisture loss, hardening of the meat, and loss of flavor. At the same time, aquatic products are rich in unsaturated fatty acids, which are prone to lipid oxidation reactions, producing off-flavor substances, leading to a decline in quality and seriously affecting the market competitiveness of the products.

[0003] As a key auxiliary material for preserving frozen aquatic products, water-retaining agents mainly function to reduce thawing loss by adsorbing and locking in moisture, while improving the texture and taste of aquatic products. However, existing water-retaining agent preparation devices mostly adopt a single stirring structure, which is prone to problems such as uneven dispersion of components and local clumping during the mixing process, affecting the stability and effectiveness of the water-retaining agent. In addition, the devices have low automation and are cumbersome to operate, making it difficult to meet the needs of large-scale production. Therefore, an antioxidant water-retaining agent for frozen aquatic products and its preparation device are proposed to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide an antioxidant water-retaining agent for frozen aquatic products and its preparation apparatus in order to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: including a preparation mixing tank, wherein a mixing component is provided inside the preparation mixing tank, a support frame is fixedly installed on the outer wall of the preparation mixing tank, and three feeding hoppers are provided at the upper end of the support frame, and a filter component is provided below each of the three feeding hoppers;

[0006] The mixing assembly includes a mounting frame fixedly installed on the upper end of the mixing tank, and a drive motor fixedly installed on the outer wall of the mounting frame. A main gear is fixedly connected to the output end of the drive motor. A first gear and a second gear are respectively meshed on the outer wall of the main gear. A second stirring rod is fixedly installed inside the first gear. A first stirring rod is fixedly installed at the bottom of the second gear. Five sets of mounting frames are fixedly installed on the outer wall of the first stirring rod, and a dispersion paddle frame is fixedly installed inside each of the five sets of mounting frames. A spiral stirring paddle is fixedly installed on the outer wall of the second stirring rod below the mounting frame. A dispersion disc of the same size is fixedly installed on the upper and lower ends of the spiral stirring paddle on the outer wall of the second stirring rod. The first gear and the second gear are fixedly installed on the upper and lower sides of the mounting frame. The second stirring rod passes through the second gear, and its extension end is rotatably installed inside the first stirring rod. The end of the second stirring rod is rotatably installed at the bottom of the mixing tank. Adjusting cylinders and guide slides are fixedly installed inside the five sets of mounting frames. A cleaning scraper is fixedly connected to one end of each adjusting cylinder and guide slide. The cleaning scraper is attached to and rotates against the inner wall of the mixing tank.

[0007] In practical applications, the upper layer uses five sets of dispersing paddles to rotate and stir the raw materials in the upper layer of the mixing tank, while also spreading the materials that have just been delivered into the tank evenly, reducing local accumulation and lowering the stirring and dispersing load. Meanwhile, the lower layer's spiral stirring paddle and two dispersing discs rotate, creating a synergistic shearing angle between the materials in the lower layer from bottom to top and the materials in the horizontal direction, ensuring thorough mixing of the materials in the lower layer. This segmented stirring and mixing structure solves problems such as uneven component dispersion and clumping, and significantly improves the uniformity of the water-retaining agent.

[0008] Furthermore, each of the three feed hoppers has a high-frequency vibrator fixedly installed on the outer wall of its lower conical hopper. The filter assembly includes mounting rings fixedly installed on the lower end of the feed hopper and one end of the conveying pipe. Each of the two mounting rings has four mounting screws threaded inside, and each mounting screw has a limit nut threadedly connected to its outer wall. A filter tube is fixedly installed between the two mounting rings. Two guide slides are symmetrically installed inside the filter tube, and each guide slide has a pull rod slidably connected inside. Mounting blocks are fixedly installed at both ends of the pull rods. A filter screen plate is fixedly installed between the two mounting blocks. The size of the filter screen plate is adapted to the size of the filter tube. There are a total of three conveying pipes, and each of the three conveying pipes is fixedly connected to a metering pump at the upper end of the support frame. The extension ends of the three conveying pipes are all installed inside the preparation mixing tank.

[0009] In practical applications, a pretreatment filter assembly is installed below the feed hopper to facilitate the initial filtration of the material used to prepare the water-retaining agent, preventing the fine powder components of the material from clumping and clogging. At the same time, the filter screen can be disassembled and replaced to facilitate the filtration of materials of different sizes.

[0010] Furthermore, a liquid outlet pipe is fixedly installed on the outer wall of the preparation mixing tank, and a sealing tank cover is fixedly installed on the upper end of the preparation mixing tank. A water inlet pipe is opened on the upper end of the sealing tank cover. The mounting bracket is fixedly installed on the upper end of the sealing tank cover. A vacuum pipe is fixedly installed on the upper end of the preparation mixing tank, and the extended end of the vacuum pipe is fixedly connected to the inside of the vacuum storage tank. A vacuum pump is fixedly connected to the outer wall of the vacuum pipe at the upper end of the vacuum storage tank.

[0011] In addition, the present invention also provides an antioxidant water-retaining agent for frozen aquatic products, comprising the above-mentioned preparation apparatus.

[0012] Compared with existing technologies, this invention has the following advantages: By setting up a mixing component and a segmented stirring operation, the upper layer uses five sets of dispersing paddles to stir and disperse the raw materials in the upper layer of the mixing tank, while uniformly spreading the materials just delivered into the tank, reducing local accumulation and lowering the stirring and dispersion load. Meanwhile, the lower layer's spiral stirring paddle and two dispersing discs rotate, creating a synergistic shearing angle between the bottom-up and horizontally moving materials in the lower layer, ensuring thorough mixing. This segmented stirring and mixing structure solves problems such as uneven component dispersion and clumping, significantly improving the uniformity of the water-retaining agent. It avoids the problem of uneven mixing caused by traditional single stirring structures. Combined with vacuum degassing, it further improves the stability of the water-retaining agent. Simultaneously, the dispersing paddles rotate, driving five cleaning scrapers to rotate and adhere to the inner wall of the mixing tank. With the assistance of an adjusting cylinder, their positions can be easily adjusted, facilitating the removal of materials adhering to the inner wall of the mixing tank and reducing the burden of subsequent cleaning for operators.

[0013] Meanwhile, a pretreatment filter assembly is installed below the feed hopper to facilitate the preliminary filtration of the material used to prepare the water-retaining agent, preventing the fine powder components of the material from clumping and clogging. The filter screen plate can also be disassembled and replaced to facilitate the filtration of materials of different sizes. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure proposed in this invention;

[0015] Figure 2 This is a schematic diagram of a partial cross-sectional structure proposed in this invention;

[0016] Figure 3 This is a schematic diagram of the hybrid component structure;

[0017] Figure 4 for Figure 1 A magnified schematic diagram of the local structure;

[0018] Figure 5 This is a schematic diagram of the filter component structure;

[0019] Figure 6 This is a schematic diagram of the filter plate structure in the filter assembly.

[0020] In the diagram: 1. Preparation mixing tank; 11. Discharge pipe; 12. Sealed tank cover; 2. Vacuum pipeline; 21. Vacuum pump; 22. Vacuum storage tank; 3. Mixing assembly; 31. Mounting frame; 32. Drive motor; 33. Main gear; 34. First gear; 35. Second gear; 36. First stirring rod; 361. Mounting frame; 362. Dispersion paddle frame; 363. Adjusting cylinder; 364. Guide slide rod; 365. Cleaning scraper; 37. Second stirring rod; 371. Dispersion disc; 372. Spiral stirring paddle; 4. Support frame; 5. Feed hopper; 6. Quantitative delivery pump; 7. Delivery pipeline; 8. Filter assembly; 81. Mounting fixing ring; 82. Mounting screw; 83. Limit nut; 84. Pull rod; 85. Filter sieve plate; 86. Guide slide; 87. Mounting block; 88. Filter tube; 9. Water inlet pipe. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] Reference Figure 1-6 An antioxidant water-retaining agent for frozen aquatic products and its preparation device, comprising a preparation mixing tank 1, a mixing component 3 inside the preparation mixing tank 1, a support frame 4 fixedly installed on the outer wall of the preparation mixing tank 1, and three feeding hoppers 5 at the upper end of the support frame 4, and a filter component 8 below each of the three feeding hoppers 5;

[0024] The mixing component 3 includes a mounting bracket 31 fixedly installed on the upper end of the preparation mixing tank 1. A drive motor 32 is fixedly installed on the outer wall of the mounting bracket 31. A main gear 33 is fixedly connected to the output end of the drive motor 32. A first gear 34 and a second gear 35 are respectively meshed on the outer wall of the main gear 33. A second stirring rod 37 is fixedly installed inside the first gear 34. A first stirring rod 36 is fixedly installed at the bottom of the second gear 35. Five sets of mounting frames 361 are fixedly installed on the outer wall of the first stirring rod 36. A dispersion paddle frame 362 is fixedly installed inside each of the five sets of mounting frames 361. A spiral stirring paddle 372 is fixedly installed on the outer wall of the second stirring rod 37 below the mounting frame 361. Furthermore, the outer wall of the second stirring rod 37 is fixedly installed with a dispersion disc 371 of the same size at both the upper and lower ends of the spiral stirring paddle 372. The first gear 34 and the second gear 35 are both fixedly installed on the upper and lower sides of the mounting frame 31. The second stirring rod 37 passes through the interior of the second gear 35, and its extended end is rotatably installed inside the first stirring rod 36. The end of the second stirring rod 37 is rotatably installed at the bottom of the preparation mixing tank 1. Adjusting cylinders 363 and guide slides 364 are fixedly installed inside both ends of the five sets of mounting frames 361. A cleaning scraper 365 is fixedly connected to one end of the adjusting cylinder 363 and the guide slide 364. The cleaning scraper 365 is attached to and rotates against the inner wall of the preparation mixing tank 1.

[0025] In practical applications, 60 parts of deionized water are first injected into the preparation mixing tank 1 through the inlet pipe 9. Then, 8 parts of composite hydrophilic colloid, 2 parts of electrolyte, 1 part of sodium citrate, and 3 parts of natural antioxidant are added sequentially through three feed hoppers 5. An external power supply is then connected, driving the drive motor 32 within the limit frame to rotate the main gear 33 within the mounting frame 31. Simultaneously, the main gear 33 drives the first gear 34 and the second gear 35 to rotate in opposite directions. This rotation of the first gear 34 causes the spiral stirring paddle 372 on the second stirring rod 37 to rotate clockwise, thus causing the multiple water-retaining agent raw materials to spiral upwards. At the highest point, they disperse in an umbrella-like shape, effectively stirring the various raw materials from top to bottom. The second stirring rod 37... 7. The rotation drives the two dispersion discs 371 to rotate horizontally, forming a synergistic shearing with the spiral stirring paddle 372, realizing a progressive process from macroscopic mixing to micron-level homogenization. This reduces the damage to the active ingredients of natural antioxidants and improves the homogenization of the water-retaining agent. Then, the second gear 35 drives the five sets of mounting frames 361 on the first stirring rod 36 to rotate counterclockwise, causing the mounting frames 361 to drive the internal dispersion paddle frame 362 to rotate, thereby stirring and dispersing the upper layer of preparation materials. This forms a rotation in different directions with the lower spiral stirring paddle 372, improving the mixing effect and solving problems such as uneven dispersion and agglomeration. The uniformity of the water-retaining agent is improved. At the same time, the second stirring rod 37 is rotated and installed inside the first stirring rod 36. The positions of the two stirring rods will not be affected when they rotate. The applicant has taken this point into consideration.

[0026] Furthermore, when the mounting frame 361 rotates, it synchronously drives the dispersion paddle frame 362 to rotate, which in turn drives the internal adjusting cylinder 363 to move the cleaning scraper 365. When the cleaning scraper 365 is in contact with the inner wall of the preparation mixing tank 1, it stops moving. At the same time, when the cleaning scraper 365 moves, it uses the guide slide rod 364 to slide and limit the position within the mounting frame 361, so as to stabilize and adjust the position of the cleaning scraper 365. This facilitates the cleaning of the inner wall of the preparation mixing tank 1 of different sizes, and avoids the preparation raw materials from being mixed and adhering to the inner wall of the preparation mixing tank 1, which would cause problems such as difficulty in cleaning. After the water-retaining agent is prepared, the inner wall is cleaned by opening the sealed tank cover 12 and using clean water to connect the water pipe.

[0027] Furthermore, refer to Figure 1-6 High-frequency vibrators are fixedly installed on the outer walls of the conical hoppers at the lower ends of the three feed hoppers 5. The filter assembly 8 includes mounting rings 81 fixedly installed on the lower end of the feed hopper 5 and one end of the conveying pipe 7. Four mounting screws 82 are threadedly connected inside the two mounting rings 81, and limit nuts 83 are threadedly connected to the outer walls of the mounting screws 82. A filter tube 88 is fixedly installed between the two mounting rings 81. Two guide slides 86 are symmetrically installed inside the filter tube 88, and a pull rod 84 is slidably connected inside the two guide slides 86. Mounting blocks 87 are fixedly installed at both ends of the pull rods 84. A filter screen plate 85 is fixedly installed between the two mounting blocks 87. The size of the filter screen plate 85 is adapted to the size of the filter tube 88. There are three conveying pipes 7 in total. The outer walls of the three conveying pipes 7 are fixedly connected to a quantitative conveying pump 6 at the upper end of the support frame 4. The extension ends of the three conveying pipes 7 are all installed inside the preparation mixing tank 1.

[0028] In practical applications, when preparing the water-retaining agent, 60 parts of deionized water are injected into the preparation mixing tank 1. Three quantitative delivery pumps 6 are started. 8 parts of composite hydrophilic colloid are added to one of the feed hoppers 5 and then transported to the preparation mixing tank 1 via the delivery pipe 7. The principle is the same. 2 parts of electrolyte and 1 part of sodium citrate are added to the second feed hopper 5 and then transported to the preparation mixing tank 1 via the delivery pipe 7 through the quantitative delivery pump 6. Finally, 3 parts of natural antioxidant are added to the last feed hopper 5 and stirred by the mixing component 3. Finally, the material is discharged through the outlet pipe 11 to obtain the water-retaining agent. The main components of the water-retaining agent are: 8 parts of composite hydrophilic colloid (4 parts xanthan gum, 2 parts guar gum, 2 parts sodium carboxymethyl cellulose), 3 parts of natural antioxidant (0.75 parts tea polyphenols, 1.5 parts rosemary extract, 0.75 parts sodium vitamin C), 2 parts of electrolyte (1 part potassium dihydrogen phosphate, 1 part potassium chloride), 1 part pH adjuster (sodium citrate), and 60 parts of deionized water.

[0029] The composite hydrophilic colloid is composed of xanthan gum, guar gum, and sodium carboxymethyl cellulose. Xanthan gum has excellent thickening, stabilizing, and water-retaining properties, forming a network structure to lock in moisture. Guar gum has good water solubility, which can enhance the viscosity of the system and improve the taste. Sodium carboxymethyl cellulose has excellent water retention capacity and stability. The combination of the three can exert a synergistic effect, improve the water retention effect, and avoid the limitations of using a single colloid. The natural antioxidant is composed of tea polyphenols, rosemary extract, and sodium vitamin C. Tea polyphenols have a strong antioxidant effect, which can scavenge free radicals and inhibit lipid oxidation. The rosemary extract contains sage. Acids are natural antioxidants with strong stability and long-lasting antioxidant effects; sodium vitamin C enhances the synergistic effect of antioxidants and improves the safety of the system. The combination of these three can effectively delay the oxidative deterioration of aquatic products without leaving any chemical residues. The electrolyte is a mixture of potassium dihydrogen phosphate and potassium chloride, which can adjust the osmotic pressure of the water-retaining agent, making it easier for the aquatic product meat to absorb water, while maintaining the electrolyte balance of the system and improving the tenderness of the meat. The pH adjuster is sodium citrate or sodium bicarbonate, which can adjust the pH value of the water-retaining agent to 6.5-7.5, adapting to the physiological environment of aquatic products and inhibiting protein denaturation. This is a technology known to those skilled in the art.

[0030] When the raw materials for the water-retaining agent are transported to the mixing tank 1, the high-frequency vibrator is activated to vibrate the raw materials in the feed hopper 5. This causes the larger lumps in the raw materials to be intercepted and filtered when they pass through the filter tube 88. The raw materials of suitable size are then transported to the mixing tank 1 via the metering pump 6 and the conveying pipeline 7. This facilitates the pre-treatment filtration of the raw materials and avoids mixing problems caused by lumpy raw materials when they are transported to the mixing tank 1, which would affect the quality of the water-retaining agent. When it is necessary to replace the filter screen plate 85 with a different filter hole, the two sets of limiting nuts 83 on the inner side of the filter tube 88 are rotated to make them rotate out of alignment with the mounting screws 82 on the two mounting rings 81. Then the filter tube 88 is disassembled, and the operator pulls the pull rod 84 to drive the two... The filter screen plate 85 between the mounting blocks 87 moves stably out along the guide slide 86, allowing the filter screen plate 85 to be disassembled and replaced with the required size filter holes. Then, the filter tube 88 is aligned between the two mounting rings 81 and screwed in place using the limit nut 83 and the mounting screw 82. The traditional single feed pipe is optimized into multiple feed pipes, with each feed port corresponding to an independent feed hopper 5. The material is conveyed along the conveying pipe 7 by the quantitative conveying pump 6. Combined with the rotating airflow of the upper dispersion paddle frame 362, the material is evenly spread, reducing local accumulation and lowering the mixing and dispersion load. The high-frequency vibrator is a miniature electromagnetic high-frequency vibrator of model XVM-20-380, which has the advantages of small size, direct fixation to the bottom of the feed hopper 5, and no dead corners.

[0031] Furthermore, a liquid outlet pipe 11 is fixedly installed on the outer wall of the mixing tank 1, and a sealing tank cover 12 is fixedly installed on the upper end of the mixing tank 1. A water inlet pipe 9 is opened on the upper end of the sealing tank cover 12. A mounting bracket 31 is fixedly installed on the upper end of the sealing tank cover 12. A vacuum pipe 2 is fixedly installed on the upper end of the mixing tank 1, and the extended end of the vacuum pipe 2 is fixedly connected to the inside of the vacuum storage tank 22. A vacuum pump 21 is fixedly connected to the outer wall of the vacuum pipe 2 at the upper end of the vacuum storage tank 22.

[0032] In practical applications, when mixing the raw materials for preparing the water-retaining agent, the air in the preparation mixing tank 1 is transported to the vacuum storage tank 22 through the vacuum pipeline 2 by driving the vacuum pump 21. This facilitates the operation of maintaining a vacuum environment in the preparation mixing tank 1 during the preparation of the water-retaining agent. A heating tube is installed in the side wall interlayer of the preparation mixing tank 1. This is an existing mature technology and has not been described in detail in this application. An electromagnetic valve is installed at the liquid outlet pipe 11 to facilitate the stable collection of the prepared water-retaining agent.

[0033] Based on the above-mentioned antioxidant water-retaining agent for frozen aquatic products, the present invention also provides a preparation apparatus.

[0034] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A preparation apparatus, characterized in that, The preparation mixing tank (1) is provided with a mixing component (3) inside the preparation mixing tank (1). A support frame (4) is fixedly installed on the outer wall of the preparation mixing tank (1), and three feed hoppers (5) are provided on the upper end of the support frame (4). A filter component (8) is provided below each of the three feed hoppers (5). The mixing component (3) includes a mounting bracket (31) fixedly installed on the upper end of the preparation mixing tank (1), and a drive motor (32) is fixedly installed on the outer wall of the mounting bracket (31). The output end of the drive motor (32) is fixedly connected to a main gear (33). The outer wall of the main gear (33) is respectively meshed with a first gear (34) and a second gear (35). A second stirring rod (37) is fixedly installed inside the first gear (34). A first stirring rod (36) is fixedly installed at the bottom of the second gear (35). Five sets of mounting frames (361) are fixedly installed on the outer wall of the first stirring rod (36), and a dispersion paddle frame (362) is fixedly installed inside each of the five sets of mounting frames (361). A spiral stirring paddle (372) is fixedly installed on the outer wall of the second stirring rod (37) below the mounting frame (361), and a dispersion disc (371) of the same size is fixedly installed on the upper and lower ends of the spiral stirring paddle (372) on the outer wall of the second stirring rod (37).

2. The preparation apparatus according to claim 1, characterized in that, The first gear (34) and the second gear (35) are both fixedly installed on the upper and lower sides of the mounting bracket (31). The second stirring rod (37) passes through the inside of the second gear (35), and its extension end is rotatably installed inside the first stirring rod (36). The end of the second stirring rod (37) is rotatably installed at the bottom of the mixing tank (1).

3. The preparation apparatus according to claim 2, characterized in that, The five sets of mounting frames (361) are respectively fixedly provided with adjusting cylinders (363) and guide slides (364) at both ends. One end of the adjusting cylinder (363) and guide slides (364) is fixedly connected to a cleaning scraper (365). The cleaning scraper (365) is attached to and rotates on the inner wall of the mixing tank (1).

4. The preparation apparatus according to claim 1, characterized in that, The preparation mixing tank (1) is fixedly provided with an outlet pipe (11) on its outer wall, and a sealing tank cover (12) is fixedly installed on the upper end of the preparation mixing tank (1). A water inlet pipe (9) is opened on the upper end of the sealing tank cover (12). The mounting bracket (31) is fixedly installed on the upper end of the sealing tank cover (12). A vacuum pipe (2) is fixedly installed on the upper end of the preparation mixing tank (1), and the extension end of the vacuum pipe (2) is fixedly connected to the inside of the vacuum storage tank (22). A vacuum pump (21) is fixedly connected to the upper end of the vacuum storage tank (22) on the outer wall of the vacuum pipe (2).

5. The preparation apparatus according to claim 1, characterized in that, A high-frequency vibrator is fixedly installed on the outer wall of the conical bucket at the lower end of each of the three feed hoppers (5). The filter assembly (8) includes a mounting ring (81) fixedly installed on the lower end of the feed hopper (5) and one end of the conveying pipe (7). Four mounting screws (82) are threaded inside the two mounting rings (81), and limit nuts (83) are threaded on the outer wall of the mounting screws (82). A filter tube (88) is fixedly installed between the two mounting rings (81).

6. The preparation apparatus according to claim 5, characterized in that, The filter tube (88) has two guide slides (86) symmetrically installed inside, and the two guide slides (86) are slidably connected to the pull rods (84). The pull rods (84) are fixedly provided with mounting blocks (87) at both ends. The two mounting blocks (87) are fixedly provided with a filter screen plate (85). The filter screen plate (85) is adapted to the size of the filter tube (88). There are three conveying pipes (7). The outer walls of the three conveying pipes (7) are fixedly connected to the quantitative conveying pump (6) at the upper end of the support frame (4). The extension ends of the three conveying pipes (7) are all installed inside the preparation mixing tank (1).

7. An antioxidant water-retaining agent for frozen aquatic products, characterized in that, It includes a preparation apparatus as described in any one of claims 1-6.

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