Anti-precipitation liquid feed stirrer
By adopting a rectangular frame fixed blade design and an alternating reverse blade arrangement in the liquid feed mixer, the problems of high-density material sedimentation and uneven torque on the mixing bearing are solved, resulting in more efficient mixing and a longer equipment life.
Patent Information
- Application Number
- CN202520531478.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-25
AI Technical Summary
Existing liquid feed mixers are prone to problems such as high-density component precipitation, poor mixing effect, uneven torque on the mixing bearing leading to reduced lifespan, and blade deformation during the mixing process.
The design features a rectangular frame to fix the blades, with forward and reverse blades arranged alternately. The lower end of the stirring shaft is connected to the support, which provides the reverse blades for fixing. The inclined bottom wall design and multi-point support structure ensure that the stirring shaft is subjected to uniform force, and the reverse blades push the material upward to enhance the mixing effect.
It effectively prevents the sedimentation of high-density materials, improves the mixing effect, extends the life of the mixing shaft and blades, and enhances the uniformity and stability of mixing.
Smart Images
Figure CN223915150U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of agitator technology, specifically, it relates to an anti-sedimentation liquid feed agitator. Background Technology
[0002] Modern livestock and poultry farms mostly use liquid feed, which is a feed form in which various nutrients are dissolved or suspended in a liquid medium. Compared with traditional solid feed, liquid feed has advantages such as easy digestibility and absorption, good palatability, precise nutritional control, and ease of feeding and management. The production process of liquid feed involves crushing and grinding solid raw materials to achieve a suitable particle size, followed by dissolving and mixing. The mixing process often uses a cylindrical, top-mounted motor agitator. The motor is installed above the top cover of the cylindrical shell, and the upper end of the stirring shaft inside the cylindrical shell extends out of the top cover and is coaxially fixed with the motor's output shaft. A discharge pipe is located in the middle of the bottom wall of the cylindrical shell. Water and raw materials enter the cylindrical shell, and the motor drives the stirring shaft and the blades on the stirring shaft to mix them. Finally, the mixture is discharged from the discharge pipe.
[0003] After long-term use, the following shortcomings of the above-mentioned mixer were found:
[0004] 1. Liquid feed is usually composed of multiple components, such as various nutrients, additives, and water. Some of these components have a significantly higher density than others or the overall average density. During mixing, these high-density components tend to accumulate at the bottom of the cylindrical shell under the influence of gravity, affecting the mixing effect.
[0005] 2. Low viscosity results in weaker suspension and support for various components, making it difficult to resist the influence of gravity on denser components. During stirring, these components tend to sink more easily, affecting the stirring effect.
[0006] 3. All the stirring blades on the stirring shaft are tilted in the same direction, that is, they face the same direction. The liquid feed is stirred clockwise or counterclockwise, with the high-density components at the bottom and the low-density components at the top, forming two layers. This can easily create stirring vortices and blind spots, affecting the stirring effect.
[0007] 4. Because the discharge pipe is located in the middle of the bottom wall of the cylindrical shell, and the lower end of the stirring shaft is directly above the discharge pipe, the lower end of the stirring shaft is suspended and unsupported. The reverse torque on the stirring bearing is entirely applied to the bearing at the upper end of the stirring shaft. If the amount of liquid feed stirred inside the cylindrical shell consistently exceeds 70%, the bearing life will be significantly reduced. After the bearing wears out, the stirring shaft will rotate eccentrically, causing the blades to collide with the inner wall of the cylindrical shell, resulting in damage to both. Furthermore, since one end of the blade is fixed to the stirring shaft while the other end is suspended, the blade will deform after prolonged use, affecting stirring efficiency. Utility Model Content
[0008] To address the shortcomings of existing technologies, this utility model provides a liquid feed agitator for preventing sedimentation, comprising a housing, a stirring shaft, and a drive assembly. The stirring shaft is rotatably mounted inside the housing along its centerline. The drive assembly is mounted on the upper end of the housing and is drively connected to the upper end of the stirring shaft. The agitator includes a rectangular frame fixedly connected to the stirring shaft. Two longitudinal sides of the rectangular frame are located on either side of the stirring shaft. At least two forward blades are provided between each longitudinal side and the stirring shaft. All forward blades have the same included angle with the stirring shaft, and all forward blades have the same inclination direction. The bottom wall of the housing slopes downward in the middle, and a discharge pipe is provided in the middle of the bottom wall. The lower end of the stirring shaft extends downward into the discharge pipe. Reverse blades with the opposite inclination direction to the forward blades are provided between the lower part of the stirring shaft and the lower ends of the two longitudinal sides, and a reverse spiral blade is provided at the lower end of the stirring shaft. The drive assembly drives the stirring shaft to rotate, thereby causing all forward blades to stir the material in the forward direction, while all reverse blades and reverse spiral blades stir the material in the reverse direction.
[0009] The beneficial effects of the anti-sedimentation liquid feed agitator of this utility model are as follows:
[0010] 1. The stirring shaft coincides with the center line of the rectangular frame and the two are welded together. One end of each blade is fixedly connected to the stirring shaft, and the other end is fixedly connected to the rectangular frame. Compared with existing blades fixed at one end, blades fixed at both ends can withstand greater stress, have a lower probability of deformation, and a longer service life.
[0011] 2. The forward-facing blades stir the material, causing it to spiral downwards, while the reverse-facing blades and reverse spiral blades push the material spiral upwards. High-density materials are pushed upwards and then mixed with low-density materials a second time. This effectively solves the problem of stratification of high-density and low-density materials caused by unidirectional mixing, as well as the problem of poor mixing effect caused by material composition, viscosity and blade orientation.
[0012] The preferred embodiment of the anti-sedimentation liquid feed agitator of this utility model is as follows: the upper end of the agitator shaft is rotatably connected to the end cover of the outer shell via an upper bearing, and the lower part of the agitator shaft is rotatably connected to the inner wall of the outer shell via a lower bearing and a bracket. Further, the bracket is cross-shaped, the lower bearing is located in the middle of the bracket, the four branch rods of the bracket are respectively provided with reverse fixing blades, and the longitudinal side of the rectangular frame is provided with notches corresponding to the branch rods.
[0013] 1. Both ends of the forward and reverse blades are fixed between the longitudinal edge and the stirring shaft. The rectangular frame increases the upper limit of pressure on all blades, while the lower bearing shares the load of the upper bearing, making the force on the stirring shaft more reasonable. The amount of mixed material inside the outer shell can reach 70%~90%, which is particularly suitable for long-term full-load mixing. The blades do not deform and the probability of damage to the two bearings is reduced.
[0014] 2. The support provides four counter-rotating fixed blades to further intercept high-density materials, further reduce the stratification phenomenon, and improve the mixing effect.
[0015] The preferred embodiment of the anti-sedimentation liquid feed mixer of this utility model is as follows: the drive assembly is installed above the end cover, and the end cover is provided with multiple feed pipes. Furthermore, multiple support legs are provided at the bottom of the outer casing, all of which are evenly distributed circumferentially, and each support leg has a circular foot pad at its lower end. The circular foot pads increase the contact area between the support legs and the ground, resulting in less shaking and smoother operation of the mixer during mixing.
[0016] The preferred embodiment of the anti-sedimentation liquid feed mixer of this utility model is as follows: the longitudinal distance between the middle of the bottom wall of the outer shell and the reverse blades is smaller than the longitudinal distance between the edge of the bottom wall of the outer shell and the reverse blades. Specifically, the angle between each reverse blade and the bottom wall of the outer shell is no greater than 3°. Along the radial direction, the gap between the reverse blades and the bottom wall becomes smaller and smaller, reducing the possibility of high-density materials accumulating on the bottom wall. The material on the bottom wall is pushed upward by the reverse blades, and after mixing, it falls from the middle to the discharge pipe, further improving the mixing effect of the material. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the structure of the anti-sedimentation liquid feed agitator in this utility model;
[0019] Figure 2 This is a top view of the image with the end caps and drive components hidden.
[0020] Figure 3 for Figure 2 A three-dimensional image;
[0021] Figure 4 for Figure 3 A schematic diagram showing the hidden outer shell;
[0022] Figure 5 for Figure 2 Sectional view along the AA direction.
[0023] Reference numerals: 1. Outer shell; 101. End cap; 102. Raw material feed pipe; 103. Water feed pipe; 104. Sensor mounting pipe; 105. Support leg; 106. Circular foot pad; 107. Discharge pipe; 2. Stirring shaft; 201. Upper bearing; 202. Lower bearing; 203. Rectangular frame; 204. Forward blade; 205. Reverse spiral blade; 206. Reverse blade; 207. Support; 208. Branch rod; 209. Reverse fixed blade; 210. Notch; 3. Drive assembly; 301. Motor; 302. Reducer. Detailed Implementation
[0024] In view of the shortcomings of the prior art, the inventor of this utility model has, through long-term research and extensive practice, proposed the technical solution of this utility model. The following will further explain and illustrate the technical solution, its implementation process, and its principles in conjunction with the accompanying drawings and specific implementation examples.
[0025] like Figure 1 As shown, Embodiment 1 provides a liquid feed agitator to prevent sedimentation, including a housing 1, a stirring shaft 2, and a drive assembly 3. The housing 1 is cylindrical in shape. The stirring shaft 2 is rotatably mounted inside the housing 1 along its centerline. The drive assembly 3 is mounted on the upper end of the housing 1 and is drively connected to the upper end of the stirring shaft 2. Specifically, the drive assembly 3 is mounted above the end cover 101. The drive assembly 3 includes a motor 301 and a reducer 302. The torque of the motor 301's shaft is increased by the reducer 302, and the output shaft of the reducer 302 is then coaxially fixed to the upper end of the stirring shaft 2. The end cover 101 is provided with a raw material inlet pipe 102, a water inlet pipe 103, and a sensor mounting pipe 104. The pipes on the end cover 101 can be added or removed as needed; this embodiment does not impose any limitations. Three support legs 105 are provided below the housing 1. All support legs 105 are evenly distributed circumferentially, and each support leg 105 has a circular foot pad 106 at its lower end. The circular foot pad 106 increases the contact area between the support leg 105 and the ground, resulting in less shaking and smoother operation of the entire mixer during the mixing process.
[0026] The rotational connection structure between the stirring shaft 2 and the outer shell 1 in this embodiment is as follows:
[0027] like Figure 2 and Figure 3 As shown, the upper end of the stirring shaft 2 is rotatably connected to the end cover 101 of the outer casing 1 via an upper bearing 201, and the lower part of the stirring shaft 2 is rotatably connected to the inner wall of the outer casing 1 via a lower bearing 202 and a bracket 207. The lower bearing 202 shares the load of the upper bearing 201, and the dual-bearing structure makes the stirring shaft 2 subjected to force smoothly, with higher concentricity and a lower probability of eccentricity. In addition, the lower bearing 202 adopts a sealed structure to prevent material from entering the interior of the lower bearing 202.
[0028] This embodiment includes a rectangular frame 203, which is fixedly connected to the stirring shaft 2. Specifically, the stirring shaft 2 coincides with the center line of the rectangular frame 203, and the two are welded together. The rectangular frame 203 is made of round steel with a circular cross-section, providing strong resistance to deformation. The two longitudinal sides of the rectangular frame 203 are located on both sides of the stirring shaft 2. Two forward blades 204 are provided between each longitudinal side and the stirring shaft 2, but not limited to two; there can be three or more, selected according to the depth of the outer casing 1. This embodiment does not impose any limitations. All forward blades 204 have the same included angle with the stirring shaft 2, and all forward blades 204 have the same inclination direction, meaning all forward blades 204 drive the material to flow spirally downwards. The forward blades 204 on both sides of the stirring shaft 2 are staggered to avoid forming blind spots in the stirring process.
[0029] like Figure 3 and Figure 4 As shown, to facilitate material discharge, the bottom wall of the outer shell 1 in this embodiment slopes downwards in the middle, and a discharge pipe 107 is provided in the middle of the bottom wall. The entire bottom wall is a downward-facing cone, and the slope of the bottom wall is selected according to the type of material. For example, for materials with low viscosity, the bottom wall slope is small, and vice versa for materials with high viscosity. In this embodiment, the lower end of the stirring shaft 2 extends downwards into the discharge pipe 107, and a reverse spiral blade 205 is provided at the lower end of the stirring shaft 2. Reverse blades 206, which are inclined in the opposite direction to the forward blades 204, are respectively provided between the lower part of the stirring shaft 2 and the lower ends of the two longitudinal sides. The reverse blades 206 are located above the reverse spiral blades 205. Both the reverse blades 206 and the reverse spiral blades 205 drive the material to flow upwards in a spiral, which is used to prevent high-density materials from settling at the bottom of the outer shell 1. In addition, the support 207 in this embodiment is cross-shaped, with the lower bearing 202 located in the middle of the support 207. The four branch rods 208 extending from the support 207 are each equipped with a reverse fixing blade 209, which is positioned above the reverse blade 206. The longitudinal side of the rectangular frame 203 has a notch 210 corresponding to the branch rods 208. During rotation, the branch rods 208 pass through the notch 210 on the rectangular side, preventing the rectangular frame 203 from colliding with the support 207. The reverse fixing blades 209 further intercept high-density materials, further reducing stratification and improving the mixing effect.
[0030] like Figure 5As shown, since the reverse blades 206 do not contact the bottom wall, if the gap between the bottom wall and the reverse blades 206 is too large, high-density material will continuously accumulate on the bottom wall. Therefore, in this embodiment, the longitudinal distance between the middle of the bottom wall of the outer shell 1 and the reverse blades 206 is smaller than the longitudinal distance between the edge of the bottom wall of the outer shell 1 and the reverse blades 206. Specifically, the angle between each reverse blade 206 and the bottom wall of the outer shell 1 is β, where β ≤ 3°, β = 3°, 2°, or 1°. Along the radial direction, the gap between the reverse blades 206 and the bottom wall becomes smaller and smaller, and the possibility of high-density material accumulating on the bottom wall is lower. The material on the bottom wall is pushed upward by the reverse blades 206, and after mixing, it falls from the middle to the discharge pipe 107. Meanwhile, some of the reverse spiral blades 205 are located in the discharge pipe 107, and the reverse spiral blades 205 push the high-density material upward for multiple mixing.
[0031] In this embodiment, the motor 301 drives the stirring shaft 2 to rotate through the reducer 302. All the forward blades 204 drive the middle and upper materials to flow downward in a spiral. At the same time, the reverse blades 206, reverse spiral blades 205 and reverse fixed blades 209 drive the sinking high-density materials to surge upward for secondary and multiple mixing. This effectively solves the problem of stratification of high-density and low-density materials caused by unidirectional mixing. However, the overall flow trend of all materials is downward, and they eventually flow into the discharge pipe 107 from the middle of the bottom wall of the outer shell 1 to complete the mixing.
[0032] It should be understood that the above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. It should not be considered that the specific implementation of this utility model is limited to these descriptions. For those skilled in the art to which this utility model pertains, several simple deductions or substitutions can be made without departing from the concept of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.
Claims
1. A liquid feed agitator for preventing sedimentation, comprising a housing, a stirring shaft, and a drive assembly, wherein the stirring shaft is rotatably mounted inside the housing along the centerline of the housing, and the drive assembly is mounted on the upper end of the housing and is drively connected to the upper end of the stirring shaft; Its features are: The device includes a rectangular frame fixedly connected to a stirring shaft. The two longitudinal sides of the rectangular frame are located on both sides of the stirring shaft. At least two positive blades are provided between each longitudinal side and the stirring shaft. All positive blades have the same included angle with the stirring shaft, and all positive blades have the same tilt direction. The bottom wall of the outer shell slopes downward in the middle, and a discharge pipe is provided in the middle of the bottom wall. The lower end of the stirring shaft extends downward into the discharge pipe. The lower part of the stirring shaft and the lower ends of the two longitudinal sides are respectively provided with reverse blades that are opposite to the inclination direction of the forward blades, and the lower end of the stirring shaft is provided with a reverse spiral blade. The stirring shaft is driven to rotate by the drive assembly, so that all the forward blades stir the material in the forward direction, while all the reverse blades and reverse spiral blades stir the material in the reverse direction.
2. The anti-sedimentation liquid feed agitator according to claim 1, characterized in that: The upper end of the stirring shaft is rotatably connected to the end cover of the outer casing via an upper bearing, and the lower part of the stirring shaft is rotatably connected to the inner wall of the outer casing via a lower bearing and a bracket.
3. The anti-sedimentation liquid feed agitator according to claim 2, characterized in that: The bracket is cross-shaped, the lower bearing is located in the middle of the bracket, the four branch rods of the bracket are respectively provided with reverse fixing blades, and the longitudinal side of the rectangular frame is provided with notches corresponding to the branch rods.
4. The anti-sedimentation liquid feed agitator according to claim 2, characterized in that: The drive assembly is mounted on top of the end cover, and the end cover is provided with multiple feed pipes.
5. The anti-sedimentation liquid feed agitator according to claim 1, characterized in that: The longitudinal distance between the middle of the bottom wall of the outer casing and the reverse blade is smaller than the longitudinal distance between the edge of the bottom wall of the outer casing and the reverse blade.
6. The anti-sedimentation liquid feed agitator according to claim 5, characterized in that: The angle between each reverse blade and the bottom wall of the casing is no greater than 3°.
7. The anti-sedimentation liquid feed agitator according to claim 1, characterized in that: The outer shell has multiple legs at its bottom, all of which are evenly distributed around the circumference and have circular foot pads at their lower ends.