Liquid raw material mixing device for aquatic feed

Abstract

The utility model discloses an aquatic feed liquid raw material mixing device relates to aquatic feed processing equipment field, aims at solving the problem that traditional device multi -density raw material is easy to stratify, deposits in tank dead zone, and the poor ability of stirring paddle adaptation different viscosity raw material. The device includes mixing jar, density adaptation feeding component, stirring mechanism, tank dead zone preventing component and support frame, and feeding component realizes accurate feeding according to raw material density through multiple directional guide vane structure, and stirring mechanism integrates adjustable angle stirring paddle, spiral dispersion paddle, scrape bottom and advance paddle and the annular stirring frame of reverse rotation, forms multistage mixing flow field, and the dead zone preventing component passes through the conical guide vane structure and wall surface spiral guide vane structure, eliminates tank bottom and tank wall dead zone. The device can effectively improve the uniformity of multi -density raw material mixing, reduces deposition, adapts different viscosity raw material, satisfies the demand of aquatic feed scale production to liquid raw material mixing.

Description

Technical Field

[0001] This utility model relates to the technical field of aquatic feed processing equipment, specifically to a liquid raw material mixing device for aquatic feed. Background Technology

[0002] In the production of aquatic feed, the mixing quality of liquid raw materials (such as low-density fish oil, medium-density amino acid aqueous solution, and high-density vegetable oil) directly affects the nutritional balance of the feed. Existing mixing devices have the following key problems: Traditional devices mostly use a single feed inlet. After raw materials of different densities are injected, they are prone to forming a stable stratification of "low-density floating top and high-density sinking bottom" due to gravity differences. Subsequent stirring needs to overcome the huge density difference, resulting in low mixing uniformity (RSD value often >15%) and high energy consumption. The bottom of the mixing tank is mostly a flat bottom structure. High-density raw materials are prone to deposit in the center or corners of the tank bottom, forming "dead zones". This not only causes raw material waste (deposition rate >8%), but may also affect feed safety due to raw material deterioration. The angle of the stirring paddle is fixed, and it is impossible to adjust the stirring mode according to the viscosity of the raw materials (such as the viscosity of vegetable oil increases to 80 mPa·s in winter and decreases to 30 mPa·s in summer). This results in low-viscosity raw materials splashing and high-viscosity raw materials not being fully mixed. The single-shaft stirring structure has a limited coverage area. Raw materials in the middle and upper part are prone to forming a "rotating flow field", which cannot achieve full tank convection. The single mixing time is often >15 minutes, which is difficult to match the continuous production rhythm of aquatic feed.

[0003] Therefore, how to solve the above-mentioned technical problems has become the subject of this utility model. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned in the background art and to propose a mixing device that can adapt to raw materials of multiple densities and has adjustable stirring parameters, so as to improve the mixing quality and production efficiency of liquid raw materials for aquatic feed.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a liquid raw material mixing device for aquatic feed is provided, including a mixing tank, the mixing tank is provided with a density-adaptive feeding component, a stirring mechanism and a dead zone prevention component inside the tank, and a support frame is provided at the bottom of the mixing tank; The density-adaptive feeding component is disposed on the cover plate of the mixing tank, including three feeding ports evenly distributed at 120° along the circumference of the cover plate. Each feeding port is connected to a guide pipe. The bottom of each guide pipe is inclined downward at 45°. The bottom outlets of the three guide pipes point to the tank wall, the middle of the tank, and the center of the tank, respectively. Each of the three guide pipe inlets is connected to a feeding pipe through a manual adjustment valve. The stirring mechanism includes a stirring shaft rotatably connected to the inner side of the center of the mixing tank. The stirring shaft is provided with an adjusting paddle, a spiral dispersing paddle, and a bottom scraping propulsion paddle from top to bottom. The dead zone prevention component inside the tank includes a guide cone fixedly connected at the center of the bottom of the mixing tank and two spiral guide ribs that are symmetrically spirally arranged along the inner wall of the mixing tank.

[0006] The mixing tank is a cylindrical hollow structure made of stainless steel with a thickness of 4mm. The cover plate is equipped with an observation window, and the bottom of the mixing tank is equipped with a discharge pipe with a manual shut-off valve connected in series on the discharge pipe.

[0007] The upper side of the stirring shaft is rotatably connected to the cover plate and is coaxially fixedly connected to the output end of the stirring motor. A rectangular adjusting block is fitted above the inner part of the mixing tank of the stirring shaft. Adjusting sleeves are fixedly connected to all four sides of the adjusting block. Four positioning holes are equidistantly opened on the outer side of the adjusting sleeve along its circumference. A rotating disk that rotates with the inner side of the adjusting sleeve is fixedly connected to the root of each adjusting paddle. Several adjusting holes that mate with the positioning holes are evenly opened on the outer wall of the rotating disk along its circumference. Fixing bolts are threadedly connected between the positioning holes and their corresponding adjusting holes.

[0008] The bottom side of the bottom-scraping propulsion paddle is fixedly connected to a scraper made of nitrile rubber, which mates with the surface of the guide cone and has a thickness of 5mm.

[0009] An annular stirring frame is fitted on the outer side of the stirring shaft. The annular stirring frame includes a top ring located below the adjusting paddle. Several vertically arranged connecting rods are fixedly connected to the top of the top ring. The bottom end of the connecting rod is fixedly connected to the top of the bottom ring. The bottom ring is located above the bottom scraping propulsion paddle. A cross is provided on the inner side of both the top ring and the bottom ring. A rotating ring that is rotatably connected to the stirring shaft is provided at the center of each cross. The outer sides of the bottom ring and the top ring are evenly provided with a number of oblique turbulence teeth, and the inner sides of the bottom ring and the top ring are evenly provided with a number of flow-reversing vanes. The outer walls of the top ring and the bottom ring are evenly provided with a number of tooth blocks, and the tooth blocks are connected to a drive assembly.

[0010] The drive assembly includes a drive rod rotatably connected to one side of the mixing tank. The bottom of the drive rod is rotatably connected to the inner side of the bottom of the mixing tank. The top of the drive rod extends through to the top of the cover plate and is coaxially fixedly connected to the output end of the drive motor. The drive rod is rotatably engaged with the cover plate. Two first gears are coaxially sleeved on the upper and lower sides of the drive rod, and the two first gears mesh with the tooth blocks located on the upper and lower sides, respectively.

[0011] A fixing rod is vertically installed on the side of the mixing tank away from the drive rod. The bottom of the fixing rod is fixedly connected to the bottom of the mixing tank, and its top extends through to the top of the cover plate. Two second gears are rotatably connected to the upper and lower sides of the fixed rod, and the two second gears mesh with the tooth blocks located on the upper and lower sides respectively.

[0012] The bottom of the stirring shaft is rotatably connected to a positioning sleeve. Two positioning plates are symmetrically fixedly connected to the outer walls of the two sides of the positioning sleeve. One of the positioning plates is rotatably connected to the drive rod on the side away from the positioning sleeve, and the other positioning plate is fixedly connected to the fixing rod on the side away from the positioning sleeve.

[0013] The beneficial effects of this utility model are as follows: 1. This utility model achieves directional injection of raw materials of different densities through three 120° distributed feed inlets and a 45° inclined guide pipe, reducing the initial stratification amount by more than 70% and improving the mixing uniformity to RSD≤6%, thus meeting the nutritional balance requirements of aquatic feed. 2. This utility model allows for adjustable paddle angle, enabling it to adapt to liquid materials with a viscosity of 1-100 mPa·s without the need to replace the paddle blades. This improves adaptability by 3 times compared to traditional fixed paddle blades, reducing equipment replacement costs. 3. This utility model eliminates the dead zone in the center of the tank bottom by combining the guide cone and scraper, and eliminates the dead zone in the tank wall by the spiral guide ribs. The raw material deposition rate at the bottom of the tank is reduced to ≤0.5%, which avoids raw material deterioration and meets the hygiene standards for aquatic feed. 4. This utility model forms a composite flow field of "axial convection + radial shear" by rotating the stirring shaft and the annular stirring frame in opposite directions (relative speed 400-600 r / min), which shortens the mixing time to 5-8 min per batch, more than 50% faster than traditional devices, and is suitable for continuous production. 5. This utility model ensures that the radial runout of the annular stirring frame is ≤0.5mm through the coordinated positioning of the positioning sleeve, the fixing rod and the driving rod, and that there is no risk of disengagement in the transmission, and the failure rate of the equipment during continuous operation is ≤2%. Attached Figure Description

[0014] Figure 1 This is the front view of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a front view of the mixing tank after the side wall of the mixing tank has been removed. Figure 4 This is a three-dimensional structural diagram of the first angle after removing the side wall of the mixing tank of this utility model; Figure 5for Figure 4 Enlarged diagram of area A; Figure 6 This is a three-dimensional structural diagram of the first angle after removing the side wall of the mixing tank of this utility model; Figure 7 for Figure 6 Enlarged diagram of area B; Figure 8 This is a schematic diagram of the adjusting paddle connection structure of this utility model.

[0015] Among them, 1. Mixing tank; 101. Cover plate; 102. Discharge pipe; 103. Manual shut-off valve; 104. Mounting block; 105. Mounting bolt; 106. Observation window; 2. Density-adaptive feeding component; 201. Guide pipe; 202. Manual regulating valve; 203. Feed pipe; 3. Stirring mechanism; 301. Stirring shaft; 302. Regulating paddle; 303. Spiral dispersing paddle; 304. Bottom scraping propulsion paddle; 305. Stirring motor; 306. Regulating block; 307. Regulating sleeve; 308. Positioning hole; 309. Rotating disk; 310. Adjustment hole; 311. Fixing bolt; 312. Top ring; 313. Connecting rod; 314. Bottom ring; 315. Cross; 316. Rotating ring; 317. Angled turbulence teeth; 318. Guide vane; 319. Tooth block; 320. Drive rod; 321. Drive motor; 322. First gear; 323. Fixing rod; 324. Second gear; 325. Positioning sleeve; 326. Positioning plate; 4. Internal dead zone prevention components; 401. Guide cone; 402. Spiral guide rib; 403. Scraper; 5. Support frame. Detailed Implementation

[0016] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0017] See Figures 1 to 8This utility model relates to a liquid feed mixing device for aquatic products, comprising a mixing tank 1. The mixing tank 1 is equipped with a density-adaptive feeding component 2, a stirring mechanism 3, and an internal dead zone prevention component 4. A support frame 5 is provided at the bottom of the mixing tank 1. The density-adaptive feeding component 2 is mounted on a cover plate 101 of the mixing tank 1 and includes three feeding ports evenly distributed at 120° along the circumference of the cover plate 101. Each feeding port is connected to a guide pipe 201, the bottom of which is inclined downwards at 45°. The bottom of the three guide pipes 201... The outlets point to the tank wall, the middle of the tank, and the center of the tank, respectively. The inlets of the three guide pipes 201 are all connected to the feed pipes 203 through manual adjustment valves 202. The stirring mechanism 3 includes a stirring shaft 301 rotatably connected to the inner side of the center of the mixing tank 1. The stirring shaft 301 is provided with an adjustment paddle 302, a spiral dispersion paddle 303, and a bottom scraping propulsion paddle 304 from top to bottom. The tank anti-dead zone component 4 includes a guide cone 401 fixedly connected to the center of the bottom of the mixing tank 1 and two spiral guide ribs 402 symmetrically spirally arranged along the inner wall of the mixing tank 1.

[0018] The mixing tank 1 is a cylindrical hollow structure, made of stainless steel with a thickness of 4mm. The cover plate 101 is equipped with an observation window 106. The bottom of the mixing tank 1 is equipped with a discharge pipe 102, and a manual shut-off valve 103 is connected in series on the discharge pipe 102.

[0019] The upper side of the stirring shaft 301 is rotatably connected to the cover plate 101 and coaxially fixedly connected to the output end of the stirring motor 305. A rectangular adjusting block 306 is sleeved on the upper part of the stirring shaft 301 located inside the mixing tank 1. Adjusting sleeves 307 are fixedly connected to all four sides of the adjusting block 306. Four positioning holes 308 are equidistantly opened on the outer side of the adjusting sleeve 307 along its circumference. A rotating disk 309 that rotatably engages with the inner side of the adjusting sleeve 307 is fixedly connected to the root of each adjusting paddle 302. Several adjusting holes 310 that engage with the positioning holes 308 are evenly opened on the outer wall of the rotating disk 309 along its circumference. Fixing bolts 311 are threadedly connected between the positioning holes 308 and their corresponding adjusting holes 310.

[0020] The bottom side of the bottom-scraping propeller 304 is fixedly connected to a scraper 403 that mates with the surface of the guide cone 401. The scraper 403 is made of nitrile rubber with a thickness of 5mm.

[0021] An annular stirring frame is fitted around the outside of the stirring shaft 301. The annular stirring frame includes a top ring 312 located below the regulating paddle 302. Several vertically arranged connecting rods 313 are fixedly connected to the top of the top ring 312. The bottom end of the connecting rods 313 is fixedly connected to the top of the bottom ring 314. The bottom ring 314 is located above the bottom scraping propulsion paddle 304. Crosses 315 are provided on the inner sides of both the top ring 312 and the bottom ring 314. A rotating ring 316 rotatably connected to the stirring shaft 301 is provided at the center of each cross. Several oblique turbulence teeth 317 are evenly arranged on the outer sides of the bottom ring 314 and the top ring 312. Several backflow vanes 318 are evenly arranged on the inner sides of the bottom ring 314 and the top ring 312. Several toothed blocks 319 are evenly arranged on the outer walls of the top ring 312 and the bottom ring 314. The toothed blocks 319 are connected to a drive assembly.

[0022] The drive assembly includes a drive rod 320 rotatably connected to one side of the mixing tank 1. The bottom of the drive rod 320 is rotatably connected to the inner side of the bottom of the mixing tank 1. The top of the drive rod 320 extends through to the top of the cover plate 101 and is coaxially fixedly connected to the output end of the drive motor 321. The drive rod 320 is rotatably engaged with the cover plate 101. Two first gears 322 are coaxially sleeved on the upper and lower sides of the drive rod 320, respectively. The two first gears 322 mesh with the tooth blocks 319 located on the upper and lower sides, respectively.

[0023] A fixing rod 323 is vertically installed on the side of the mixing tank 1 away from the drive rod 320. The bottom of the fixing rod 323 is fixedly connected to the bottom of the mixing tank 1, and its top extends to the top of the cover plate 101. Two second gears 324 are rotatably connected to the upper and lower sides of the fixing rod 323, and the two second gears 324 mesh with the tooth blocks 319 located on the upper and lower sides respectively.

[0024] A positioning sleeve 325 is rotatably connected to the bottom of the stirring shaft 301. Two positioning plates 326 are symmetrically fixedly connected to the outer walls of the two sides of the positioning sleeve 325. One of the positioning plates 326 is rotatably connected to the drive rod 320 on the side away from the positioning sleeve 325, and the other positioning plate 326 is fixedly connected to the fixing rod 323 on the side away from the positioning sleeve 325.

[0025] In practical use: First, adjust the angle of the adjusting paddle 302 according to the viscosity characteristics of the raw materials to be mixed (e.g., in this case, mixing high-viscosity vegetable oil (80 mPa·s), medium-viscosity amino acid aqueous solution (3 mPa·s), and low-viscosity fish oil (5 mPa·s)). Loosen the fixing bolt 311 and rotate the rotating disk 309 at the base of the adjusting paddle 302 to flexibly adjust the angle between the adjusting paddle 302 and the stirring shaft 301. For high-viscosity raw materials, adjust the angle to 45° (aligned and locked through the adjusting hole 310 and the positioning hole 308). This angle can enhance the propulsion force of the adjusting paddle 302 and prevent high-viscosity raw materials from accumulating near the paddle blades. If mixing low-viscosity raw materials, the angle can be adjusted to 25° to reduce material splashing. Through the adjustable angle design, it can adapt to the full viscosity range of 1-100 mPa·s without replacing the paddle blades, improving adaptability by 3 times compared to traditional fixed paddles and reducing equipment replacement costs.

[0026] Then, the stirring motor 305 is turned on, and power is transmitted to the stirring shaft 301 via the coupling, driving the regulating paddle 302, the spiral dispersing paddle 303, and the bottom scraping propulsion paddle 304 to rotate clockwise. The drive motor 321 is then turned on, transmitting power to the drive rod 320, causing the first gears 322 on both sides of the drive rod 320 to rotate. Because the first gears 322 mesh with the toothed blocks 319 on the outer walls of the top ring 312 and the bottom ring 314, they drive the annular stirring frame to rotate counterclockwise. Simultaneously, on the fixed rod 323 on the other side of the mixing tank 1, the second gear 324 meshes with the toothed blocks 319, providing guidance for the annular stirring frame and preventing the toothed blocks 319 from disengaging from the first gear 322. The stirring shaft 301 and the annular stirring frame rotate in opposite directions, forming a composite flow field of "axial convection + radial shear" in advance, laying the foundation for subsequent feeding and mixing.

[0027] The operator monitors the feeding status through the observation window 106 on the cover plate 101, and opens the manual regulating valves 202 corresponding to the three feed pipes 203, injecting raw materials according to the flow ratio of "high-density vegetable oil: medium-density amino acid aqueous solution: low-density fish oil = 1:1.5:0.8" (e.g., vegetable oil 10L / min, amino acid aqueous solution 15L / min, fish oil 8L / min); the raw materials are injected directionally through the guide pipe 201 (45° inclined downwards) of the density-adaptive feed component 2: high-density vegetable oil: the outlet of guide pipe 201 points towards the tank wall of mixing tank 1) (10-15mm from the inner surface of the tank wall), the tank wall blocks and slows down the flow rate, avoiding direct impact on the medium and low density raw materials; at the same time, the spiral guide ribs 402 (2 ribs, symmetrically spiraled, with an angle of 30°-45°) on the inner wall of mixing tank 1) change the flow direction of vegetable oil along the wall, guiding it to diffuse towards the center of the tank, preventing the formation of "along-wall settling flow"; medium-density amino acid aqueous solution: guide pipe 201 The outlet points to the center of the tank (150-200mm from the axis of the stirring shaft 301), directly entering the effective range of the spiral dispersing paddle 303, allowing it to participate in mixing without long-distance diffusion; for low-density fish oil: the outlet of the guide pipe 201 points to the center of the tank (10-15mm from the axis of the stirring shaft 301), reducing the initial contact area with high-density vegetable oil and avoiding floating and stratification. Three guide pipes 201 provide density-oriented feeding, reducing initial stratification by more than 70%, simplifying subsequent mixing; the spiral guide ribs 402 eliminate dead zones near the tank wall, increasing the diffusion efficiency of raw materials along the wall by 50%.

[0028] Low-density fish oil is pushed downwards by the regulating paddle 302 and enters the range of the oblique turbulence teeth 317 on the outside of the annular stirring frame. When the annular stirring frame rotates counterclockwise, the turbulence teeth 317 radially shear the fish oil, breaking it into small liquid clusters of 5-10 mm. At the same time, the guide vanes 318 on the inside of the annular stirring frame guide the liquid to flow upwards and downwards, promoting the initial fusion of fish oil and medium-density amino acid aqueous solution. Convection mixing by the central spiral dispersing paddle: The medium-density amino acid aqueous solution and the broken fish oil enter the region of the spiral dispersing paddle 303. The spiral dispersing paddle 303 rotates clockwise to generate an upward axial thrust, forming a "countercurrent flow field" with the downward push of the regulating paddle 302, breaking the limitations of the traditional "rotating flow field". At the same time, the blades of the spiral dispersing paddle (303) shear the high-density vegetable oil, so that 30%-40% of the vegetable oil is transported upwards, realizing deep convection of the three raw materials. Bottom scraper propeller and guide cone prevent sedimentation: A small amount of incompletely dispersed high-density vegetable oil falls to the bottom of the tank and is pushed upward by the bottom scraper propeller 304 (with an angle of 35° to the axis of the stirring shaft 301). The scraper 403 (nitrile rubber, 5mm thick) on the bottom side of the bottom scraper propeller 304 and the guide cone 401 (cone angle 75°-85°, mirror polished Ra≤1.6μm) of the anti-dead zone component 4 inside the tank have a surface fit of ≥98% and a gap of ≤0.1mm, which can remove the deposited raw materials on the surface of the guide cone (401). The guide cone 401 guides the raw materials at the bottom of the tank to flow to the edge, completely eliminating the dead zone in the center of the tank bottom. The whole tank forms a three-stage mixing of "top-middle-bottom", with a mixing uniformity (RSD value) of ≤6%, which meets the nutritional balance requirements of aquatic feed. The sedimentation rate at the bottom of the tank is reduced to ≤0.5%, avoiding the deterioration of the raw materials. Operators can observe the mixing status inside the tank in real time through the observation window 106. If local stratification is found (such as the fish oil at the top not being completely dispersed), the corresponding manual adjustment valve 202 can be finely adjusted (such as appropriately reducing the fish oil feed rate by 0.5-1L / min) to ensure accurate mixing ratio. When the raw material liquid level in the tank reaches the predetermined height, the manual adjustment valve 202 is closed, and the stirring system continues to run for 5 minutes to ensure that the raw materials are completely mixed.

[0029] Open the manual shut-off valve 103 on the discharge pipe 102, and the mixed liquid raw material is discharged into the aquatic feed subsequent processing equipment through the Φ50-80mm discharge pipe 102. During the discharge process, keep the stirring motor 305 (speed reduced to 80r / min) and drive motor 321 (speed reduced to 150r / min) running at low speed. The bottom scraper propeller 304 and scraper 403 continuously push the raw material at the bottom of the tank, and the spiral dispersing paddle 303 prevents the raw material from accumulating in the middle, ensuring that the discharge is thorough and without residue.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mixing device for liquid raw materials in aquatic feed, comprising a mixing tank (1), characterized in that, The mixing tank (1) is equipped with a density-adaptive feeding component (2), a stirring mechanism (3), and a dead zone prevention component (4) inside the tank. A support frame (5) is provided at the bottom of the mixing tank (1). The density-adaptive feeding component (2) is disposed on the cover plate (101) of the mixing tank (1), including three feed ports evenly distributed at 120° along the circumference of the cover plate (101). Each feed port is connected to a guide pipe (201). The bottom of the guide pipe (201) is inclined downward at 45°. The bottom outlets of the three guide pipes (201) point to the tank wall, the middle of the tank, and the center of the tank, respectively. The inlet of each of the three guide pipes (201) is connected to a feed pipe (203) through a manual regulating valve (202). The stirring mechanism (3) includes a stirring shaft (301) rotatably connected to the inner side of the center of the mixing tank (1). The stirring shaft (301) is provided with an adjusting paddle (302), a spiral dispersing paddle (303), and a bottom scraping propulsion paddle (304) from top to bottom. The dead zone prevention component (4) inside the tank includes a guide cone (401) fixedly connected at the center of the bottom of the mixing tank (1) and two spiral guide ribs (402) symmetrically spirally arranged along the inner wall of the mixing tank (1).

2. The liquid feed mixing device for aquatic feed according to claim 1, characterized in that, The mixing tank (1) is a cylindrical hollow structure, made of stainless steel with a thickness of 4mm. The cover plate (101) is provided with an observation window (106). The bottom of the mixing tank (1) is provided with a discharge pipe (102), and a manual shut-off valve (103) is connected in series on the discharge pipe (102).

3. The liquid feed mixing device for aquatic feed according to claim 2, characterized in that, The upper side of the stirring shaft (301) is rotatably connected to the cover plate (101) and is coaxially fixedly connected to the output end of the stirring motor (305); The stirring shaft (301) is located above the inner part of the mixing tank (1) and a rectangular adjusting block (306) is fitted on it. Adjusting sleeves (307) are fixedly connected to all four sides of the adjusting block (306). Four positioning holes (308) are equidistantly opened on the outer side of the adjusting sleeve (307) along its circumference. A rotating disk (309) that rotates and cooperates with the inner side of the adjusting sleeve (307) is fixedly connected to the root of each adjusting paddle (302). A number of adjusting holes (310) that cooperate with the positioning holes (308) are evenly opened on the outer wall of the rotating disk (309) along its circumference. Fixing bolts (311) are threadedly connected between the positioning holes (308) and their corresponding adjusting holes (310).

4. The liquid feed mixing device for aquatic feed according to claim 3, characterized in that, The bottom of the scraper propeller (304) is fixedly connected to a scraper (403) that mates with the surface of the guide cone (401). The scraper (403) is made of nitrile rubber with a thickness of 5 mm.

5. The liquid feed mixing device for aquatic feed according to claim 4, characterized in that, An annular stirring frame is fitted on the outer side of the stirring shaft (301). The annular stirring frame includes a top ring (312) located below the regulating paddle (302). Several vertically arranged connecting rods (313) are fixedly connected to the top of the top ring (312). The bottom end of the connecting rod (313) is fixedly connected to the top of the bottom ring (314). The bottom ring (314) is located above the bottom scraping propulsion paddle (304). A cross (315) is provided on the inner side of both the top ring (312) and the bottom ring (314). A rotating ring (316) rotatably connected to the stirring shaft (301) is provided at the center of each cross (315). The bottom ring (314) and the top ring (312) are uniformly provided with a number of oblique turbulence teeth (317), and the bottom ring (314) and the top ring (312) are uniformly provided with a number of backflow vanes (318). The outer walls of the top ring (312) and the bottom ring (314) are evenly provided with a number of tooth blocks (319), and the tooth blocks (319) are connected to a drive assembly.

6. The liquid feed mixing device for aquatic feed according to claim 5, characterized in that, The drive assembly includes a drive rod (320) rotatably connected to one side of the mixing tank (1). The bottom of the drive rod (320) is rotatably connected to the inner side of the bottom of the mixing tank (1). The top of the drive rod (320) extends through to the top of the cover plate (101) and is coaxially fixedly connected to the output end of the drive motor (321). The drive rod (320) rotatably engages with the cover plate (101). Two first gears (322) are coaxially sleeved on the upper and lower sides of the drive rod (320). The two first gears (322) mesh with the tooth blocks (319) located on the upper and lower sides respectively.

7. The liquid feed mixing device for aquatic feed according to claim 6, characterized in that, A fixing rod (323) is vertically installed on the side of the mixing tank (1) away from the drive rod (320). The bottom of the fixing rod (323) is fixedly connected to the bottom of the mixing tank (1), and its top extends to the top of the cover plate (101). The upper and lower sides of the fixed rod (323) are respectively rotatably connected to two second gears (324), and the two second gears (324) mesh with the tooth blocks (319) located on the upper and lower sides respectively.

8. The liquid feed mixing device for aquatic feed according to claim 7, characterized in that, The bottom of the stirring shaft (301) is rotatably connected to a positioning sleeve (325). Two positioning plates (326) are symmetrically fixedly connected to the outer walls of the two sides of the positioning sleeve (325). One of the positioning plates (326) is rotatably connected to the drive rod (320) on the side away from the positioning sleeve (325), and the other positioning plate (326) is fixedly connected to the fixing rod (323) on the side away from the positioning sleeve (325).

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