Raw material stirring device for calcium hydrophosphate production and processing
By using reciprocating stirring blades driven by alternating magnetic fields and a reverse shearing design, combined with temperature sensing elements and an automated cleaning system, the problem of dead zones and sedimentation in traditional stirring devices when mixing dicalcium phosphate raw materials has been solved, achieving efficient mixing and clean production, and improving production efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- KUNMING YUNPANSHAN PHOSPHORUS CHEM CO LTD
- Filing Date
- 2026-03-16
- Publication Date
- 2026-04-14
AI Technical Summary
Traditional mixing devices are prone to mixing dead zones, stratification, and sedimentation when mixing raw materials such as dicalcium phosphate with large density differences, easy sedimentation, or high viscosity. They are also cumbersome to clean and lack efficient heating and temperature control mechanisms, which affects production efficiency and product quality.
It employs reciprocating stirring blades driven by alternating magnetic fields and a reverse shearing design, combined with temperature sensing elements and an automated cleaning system, to achieve three-dimensional high-efficiency mixing, auxiliary heating, and integrated filtration, ensuring uniform distribution and efficient cleaning.
It achieves three-dimensional uniform mixing of dicalcium phosphate raw materials, improves mixing efficiency and product quality, simplifies the cleaning process, reduces labor intensity and equipment complexity, and complies with the production standards for food and feed additives.
Smart Images
Figure CN121846958A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of stirring device technology, specifically a raw material stirring device for the production and processing of dicalcium phosphate. Background Technology
[0002] As an important feed additive and food fortifier, the production quality of dicalcium phosphate directly depends on the uniformity of the raw material mixing. In existing production processes, mechanical mixing devices are commonly used. However, traditional mixing devices mostly rely on the unidirectional rotation of the stirring blades, resulting in a single mixing method. For dicalcium phosphate raw materials with large density differences, easy settling, or high viscosity, mixing dead zones, stratification, and sedimentation are easily formed, leading to substandard product uniformity and making it unsuitable for mixing systems containing surfactants.
[0003] Furthermore, traditional stirring blades tend to accumulate large amounts of viscous raw materials after operation, leading to material waste, cross-contamination, and increased tedious cleaning and maintenance work, severely impacting production efficiency and continuity. On the other hand, some dicalcium phosphate production processes require optimized reactions at specific temperatures, but conventional stirring equipment lacks efficient and integrated heating and temperature control mechanisms, typically requiring external heating equipment, making the system complex and energy-intensive. Summary of the Invention
[0004] The purpose of this invention is to provide a raw material stirring device for the production and processing of dicalcium phosphate, so as to solve the problems mentioned in the prior art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a raw material stirring device for the production and processing of dicalcium phosphate, comprising a tank, wherein the tank is provided with an inlet and an outlet, a drive assembly is provided on the tank, and a stirring assembly is installed below the drive assembly; The stirring assembly includes a sleeve and a drive shaft. A first magnetic component and a reciprocating cylinder are sequentially installed on the sleeve. A second magnetic component is provided on one side of the reciprocating cylinder. The first magnetic component is a coil, and the two ends of the coil are electrically connected to the control system. The second magnetic component is a magnet, and the magnet is within the magnetic field range of the coil. A first stirring blade is rotatably provided on the other side of the reciprocating cylinder. The upper end of the drive shaft is connected to the drive assembly, and the lower end of the drive shaft is connected to the first stirring blade through a telescopic assembly.
[0006] The telescopic assembly includes a rotating cylinder and a sliding cylinder, which are respectively mounted on the drive shaft and the first stirring blade. The rotating cylinder and the sliding cylinder are respectively provided with protrusions and grooves, which engage with each other. Each protrusion and groove is provided with a number of ball bearings.
[0007] The first stirring blade is made of metal, and a temperature sensing element is provided on the inner wall of the tank. The temperature sensing element is electrically connected to the control system, and an anti-stick coating is provided on the surface of the first stirring blade.
[0008] A second stirring blade is provided on the outer side of the sleeve. The first stirring blade and the second stirring blade are in opposite directions. Both the first stirring blade and the second stirring blade are made of metal. A temperature sensing element is provided on the inner wall of the tank. The temperature sensing element is electrically connected to the control system. Both the first and second stirring blades are provided with an anti-stick coating.
[0009] The first stirring blade has a cavity inside, and the cavity is filled with heat-conducting oil.
[0010] A filter assembly is installed below the first stirring blade. The filter assembly includes a top plate, a filter screen, and a bottom plate. The top plate and the bottom plate are connected by a support shaft. The bottom plate is mounted on the tank body, and the filter screen is disposed between the top plate and the bottom plate. The bottom plate located inside the filter screen is connected to the inlet of a pump via a drain pipe, and the pump is mounted on the tank.
[0011] The bottom of the first stirring blade is rotatably provided with a vertical shaft, which passes through the top plate and is connected to the filter screen. A sliding seal connection is formed between the vertical shaft and the top plate.
[0012] The vertical shaft is hollow inside and has a spray nozzle for spraying cleaning fluid. The interior of the vertical shaft is connected to the middle of the drain pipe through a connecting pipe. Solenoid valves and flow meters are installed in the inlets of both the connecting pipe and the drain pipe. The solenoid valves and flow meters are electrically connected to the control system.
[0013] The filter screen has several pleats and is elastic.
[0014] The sleeve is mounted on the tank body, and the sleeve and the reciprocating cylinder are connected by a spline. The drive shaft is rotatably mounted on the tank body. The drive assembly includes a drive motor, the output end of which is connected to a transmission shaft, and the drive motor is mounted on the tank.
[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. While achieving efficient three-dimensional mixing, it ensures uniform distribution of materials within the tank. The control system supplies alternating current to the coils on the inner wall of the sleeve, generating an alternating magnetic field. This causes the first stirring blade to continuously rotate while simultaneously undergoing reciprocating up-and-down vibration. This combined rotational and vibration motion breaks away from the traditional unidirectional stirring pattern. The up-and-down movement of the first stirring blade can continuously agitate the raw materials at different depths in the tank, effectively eliminating mixing dead zones and sediment layers, and ensuring the uniform distribution of materials in three-dimensional space. It is particularly suitable for easily stratified dicalcium phosphate slurry and for mixing systems containing surfactants.
[0016] 2. The mixing effect of auxiliary heating and reverse shearing. The second stirring blade, fixed to the outside of the sleeve, is designed with its blade angle opposite to that of the rotating first stirring blade. Temperature sensing elements (such as temperature sensors) installed on the inner wall of the tank monitor the material temperature in real time and feed the data back to the control system. The heating temperature is precisely controlled by dynamically adjusting the coil current, achieving uniform heating during the stirring process. This avoids the system complexity and low thermal efficiency problems caused by external heating equipment. Through closed-loop temperature control, it can be ensured that the dicalcium phosphate raw material is mixed at the most suitable reaction temperature, effectively optimizing process conditions and improving product quality. On the other hand, the combined action of the rotating first stirring blade and the fixed second stirring blade creates a strong velocity difference and shear force in the tank, generating highly efficient turbulence. This reverse shear flow field can quickly disperse agglomerated raw material particles, greatly improving mixing efficiency and uniformity. It is particularly effective for high-viscosity materials, achieving a dual improvement in mixing quality and reaction efficiency.
[0017] 3. Integrated filtration and cleaning. After mixing, the extraction pump located on the drain pipe is started to extract and collect the uniformly mixed and filtered clear liquid or fine slurry. When cleaning is required, the control system switches the state of the solenoid valve on the connecting pipe and the drain pipe, turning the outlet of the extraction pump into the inlet, and pumping the external cleaning liquid back into the system. The cleaning liquid is evenly sprayed onto the filter screen, tank wall and mixing components through the spray nozzles on the hollow vertical shaft. The up-and-down reciprocating vibration of the first mixing blade is transmitted to the elastic pleated filter screen through the vertical shaft, causing it to vibrate periodically, achieving continuous operation from mixing to discharge and improving overall production efficiency. The dynamic vibration of the filter screen, combined with the spraying of cleaning fluid, generates a highly efficient "oscillating flushing" effect, which can thoroughly remove particulate impurities clogging the filter pores, realize the self-regeneration of the filter screen, maintain excellent filtration flux for a long time, and the entire cleaning process does not require manual disassembly. It is highly automated, which not only greatly reduces labor intensity and downtime, but also avoids the safety risks of personnel coming into contact with chemical cleaning agents. At the same time, it ensures the high hygiene standards of the equipment, which is particularly in line with the production specifications of the food and feed additive industry. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the drive motor in this invention; Figure 3 This is a schematic diagram of the transmission shaft in this invention; Figure 4 yes Figure 3 A magnified view of a portion of region A in the middle; Figure 5 This is a schematic diagram of the reciprocating cylinder in this invention; Figure 6 This is a schematic diagram of the structure of the second stirring blade in this invention; Figure 7 This is a schematic diagram of the coil structure in this invention.
[0019] In the diagram: 1. Tank body; 101. Inlet; 102. Outlet; 2. Drive assembly; 21. Drive motor; 3. Stirring assembly; 31. Sleeve; 311. Reciprocating cylinder; 312. First stirring blade; 313. Coil; 314. Second stirring blade; 32. Drive shaft; 33. Telescopic assembly; 331. Rotating cylinder; 332. Sliding cylinder; 4. Filter assembly; 41. Top plate; 42. Filter screen; 43. Bottom plate. Detailed Implementation
[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0021] Example: Figures 1-7 As shown, the present invention provides a technical solution for a raw material stirring device for the production and processing of dicalcium phosphate, comprising a tank 1, an inlet 101 and an outlet 102 on the tank 1, a drive assembly 2 on the tank 1, and a stirring assembly 3 installed below the drive assembly 2; the stirring assembly 3 includes a sleeve 31 and a drive shaft 32, a first magnetic component and a reciprocating cylinder 311 are sequentially installed on the sleeve 31, and a second magnetic component is provided on one side of the reciprocating cylinder 311. The first magnetic component is a coil 313, and the two ends of the coil 313 are electrically connected to the control system. The two magnetic components are magnets. The magnets are within the magnetic field range of the coil 313. A first stirring blade 312 is rotatably mounted on the other side of the reciprocating cylinder 311. The upper end of the drive shaft 32 is connected to the drive assembly 2, and the lower end of the drive shaft 32 is connected to the first stirring blade 312 through the telescopic assembly 33. A sleeve 31 is mounted on the tank body 1. The sleeve 31 and the reciprocating cylinder 311 are connected by a spline. The drive shaft 32 is rotatably mounted on the tank body 1. The upper end of the drive shaft 32 is connected to the drive assembly 2, and the lower end of the drive shaft 32 is connected to the first stirring blade 312 through the telescopic assembly 33.
[0022] When it is necessary to stir the raw materials, the control system drives the drive shaft 32 to rotate through the drive component 2. The drive shaft 32 drives the first stirring blade 312 to rotate through the telescopic component 33. At this time, the staff delivers the raw materials into the tank 1 through the feed inlet 101. The first stirring blade 312 stirs the raw materials to make them evenly mixed. When it is necessary to improve the mixing effect of raw materials, the control system supplies alternating current to coil 313, so that coil 313 continuously generates an alternating magnetic field, and the magnetic field of coil 313 interacts with the magnetic field of magnet. When the magnetic field generated by coil 313 and the magnetic field of magnet repel each other, under the action of repulsive force, magnet drives reciprocating cylinder 311 to move downward, and reciprocating cylinder 311 drives first stirring blade 312 to move downward; when the magnetic field generated by coil 313 and the magnetic field of magnet attract each other, under the action of attractive force, magnet drives reciprocating cylinder 311 to move upward, and reciprocating cylinder 311 drives first stirring blade 312 to move upward. The coil 313 continuously generates an alternating magnetic field, causing the first stirring blade 312 to move up and down reciprocally while rotating, so as to stir the raw materials at different depths. This three-dimensional motion ensures uniform mixing of the raw materials and avoids stratification or sedimentation.
[0023] The telescopic component 33 includes a rotating cylinder 331 and a sliding cylinder 332. The rotating cylinder 331 and the sliding cylinder 332 are respectively disposed on the drive shaft 32 and the first stirring blade 312. The rotating cylinder 331 and the sliding cylinder 332 are respectively provided with protrusions and grooves, which are engaged with each other. Several balls (not shown in the figure) are provided in both the protrusions and the grooves.
[0024] During the up-and-down vibration of the first stirring blade 312, the telescopic component 33 ensures the continuity of power transmission. The drive component 2 drives the transmission shaft 32 to rotate, and the transmission shaft 32 drives the rotating cylinder 331 to rotate. The rotating cylinder 331 drives the sliding cylinder 332 to rotate through the protrusion and groove structure, thereby driving the first stirring blade 312 to rotate. At the same time, the ball bearings in the protrusion and groove allow the rotating cylinder 331 and the sliding cylinder 332 to slide up and down relative to each other, reducing friction loss and improving the durability of the rotating cylinder 331 and the sliding cylinder 332.
[0025] The first stirring blade 312 is made of metal. A temperature sensing element is installed on the inner wall of the tank 1. The temperature sensing element is electrically connected to the control system. The surface of the first stirring blade 312 is provided with an anti-stick coating.
[0026] Both the first stirring blade 312 and the second stirring blade 314 are made of metal. The first stirring blade 312 cuts magnetic field lines in the alternating magnetic field, generating eddy currents to heat the raw materials. The temperature sensing element is a temperature sensor, which monitors the temperature inside the tank 1 in real time and feeds the data back to the control system. The control system dynamically adjusts the current flowing through the coil 313 according to the difference between the set temperature and the measured temperature, thereby controlling the magnetic field strength and heating temperature to ensure that the raw materials are mixed at a suitable temperature and optimize the reaction conditions.
[0027] A second stirring blade 314 is provided on the outer side of the sleeve 31. The first stirring blade 312 and the second stirring blade 314 are in opposite directions. Both the first stirring blade 312 and the second stirring blade 314 are made of metal. A temperature sensing element is provided on the inner wall of the tank 1. The temperature sensing element is a temperature sensor and is electrically connected to the control system. The surfaces of the first stirring blade 312 and the second stirring blade 314 are provided with an anti-stick coating.
[0028] The second stirring blade 314 is fixed to the outside of the sleeve 31. When the first stirring blade 312 rotates, the second stirring blade 314 further breaks the agglomeration of the raw material and forms turbulent enhanced mixing, which is especially suitable for high viscosity or easily settled dicalcium phosphate raw materials.
[0029] The first stirring blade 312 has a cavity inside, and heat transfer oil is placed inside the cavity.
[0030] When the coil 313 generates an alternating magnetic field, the first stirring blade 312 cuts the magnetic field lines and generates heat. However, one end of the first stirring blade 312 is close to the coil 313, while the other end is far away from the coil 313, resulting in one end of the first stirring blade 312 having a higher temperature and the other end having a lower temperature. The higher-temperature end and the lower-temperature end exchange heat through the heat transfer oil to keep the overall temperature of the first stirring blade 312 uniform.
[0031] A filter assembly 4 is installed below the first stirring blade 312. The filter assembly 4 includes a top plate 41, a filter screen 42, and a bottom plate 43. The top plate 41 and the bottom plate 43 are connected by a support shaft. The bottom plate 43 is set on the tank body 1. The filter screen 42 is set between the top plate 41 and the bottom plate 43. The bottom plate 43, located inside the filter screen 42, is connected to the inlet of a pump (not shown in the figure) through a drain pipe. The pump is set on the tank body 1. The filter screen 42 has several pleats and is elastic.
[0032] The bottom of the first stirring blade 312 is rotatably equipped with a vertical shaft. The vertical shaft passes through the top plate 41 and is connected to the filter screen 42. A sliding seal connection is formed between the vertical shaft and the top plate 41. The upper end of the vertical shaft is rotatably connected to the first stirring blade 312, and the lower end of the vertical shaft is slidably connected to the top plate 41. The lower end of the vertical shaft is restricted by the top plate 41 and can only move up and down.
[0033] When the first stirring blade 312 drives the vertical shaft to move upward, the vertical shaft pulls the filter screen 42, causing the pleats on the filter screen 42 to gradually unfold. When the first stirring blade 312 drives the vertical shaft to move downward, the filter screen 42 gradually contracts and becomes pleated under its own elastic force. The filter screen 42 is continuously vibrated by the vertical shaft, which achieves the cleaning treatment of the filter screen 42 and improves the filtration effect of the filter screen 42. A sliding seal is formed between the vertical shaft and the top plate 41 to prevent leakage and ensure the system's airtightness.
[0034] The vertical shaft is hollow inside and has spray nozzles for spraying cleaning fluid. The interior of the vertical shaft is connected to the middle of the drain pipe through a connecting pipe. Solenoid valves and flow meters are installed in the inlets of both the connecting pipe and the drain pipe. The solenoid valves and flow meters are electrically connected to the control system.
[0035] When it is necessary to discharge the mixed raw materials from tank 1, the control system closes the solenoid valve in the connecting pipe and opens the solenoid valve in the drain pipe. At this time, the drain pipe is connected to the inside of the filter screen 42, and then the extraction pump is controlled to work. The extraction pump extracts the raw materials that have been mixed and filtered from the filter screen 42 and discharges them from tank 1 through the outlet of the extraction pump. At the same time, the staff collects and processes the materials. When the filter screen 42, tank 1 and stirring assembly 3 need to be cleaned, the control system closes the solenoid valve in the drain pipe inlet and opens the solenoid valve in the connecting pipe. At this time, the connecting pipe will be connected to the middle of the drain pipe. The operator connects the outlet of the extraction pump to the cleaning liquid. The extraction pump works in reverse and draws the cleaning liquid through the drain pipe and connecting pipe into the vertical shaft. It is then sprayed from the spray nozzle onto the filter screen 42, tank 1 and stirring assembly 3 to clean the filter screen 42, tank 1 and stirring assembly 3. The flow meter monitors the cleaning fluid flow rate to ensure proper usage. Combined with the vibration of the filter screen 42 caused by the vertical shaft, the cleaning fluid is evenly distributed and washes away residual impurities, enhancing the cleaning effect and achieving automated cleaning with reduced manual intervention.
[0036] Working principle: After the device is started, the control system first controls the drive component 2 to work. The drive motor 21 drives the transmission shaft 32 to rotate. The transmission shaft 32 transmits power to the first stirring blade 312 through the telescopic component 33, so that the first stirring blade 312 stirs in the tank 1. After the raw materials are put in through the feed port 101, they are mixed under the rotational shearing action of the first stirring blade 312.
[0037] To improve the mixing effect, the control system supplies alternating current to the coil 313 on the inner wall of the sleeve 31, which generates an alternating magnetic field. The magnetic field generated by the coil 313 interacts with the magnet at the top of the reciprocating cylinder 311, periodically generating attraction and repulsion forces, driving the reciprocating cylinder 311 to move up and down, thereby causing the first stirring blade 312 to rotate and vibrate axially, forming a three-dimensional composite motion. This three-dimensional composite motion can penetrate different raw material layers, effectively breaking up stratification and sedimentation, and ensuring the uniformity of the mixture. During the reciprocating motion, the slight impact between the reciprocating cylinder 311 and the sleeve 31 generates mechanical vibration, which is transmitted to the stirring blade and can loosen the impurities attached to the first stirring blade 312, achieving self-cleaning.
[0038] During the stirring process, the first stirring blade 312 (and the second stirring blade 314) made of metal cuts magnetic field lines in the alternating magnetic field to generate eddy current heating effect to assist in heating the raw materials. The embedded temperature sensor monitors the temperature inside the tank in real time and feeds it back to the control system. Precise temperature control is achieved by dynamically adjusting the current of the coil 313 to optimize the reaction conditions. The heat-conducting oil filled in the cavity inside the first stirring blade 312 can balance the temperature distribution of the blade body and avoid local overheating.
[0039] The vertical shaft at the bottom of the first stirring blade 312 moves up and down, causing the elastic filter screen 42 to periodically expand and fold, which not only enhances the filtration efficiency but also cleans the filter screen through vibration. After mixing is completed, the extraction pump is started, and the finished product is extracted and output through the drain pipe.
[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A raw material stirring device for the production and processing of dicalcium phosphate, characterized in that: Includes a tank (1), which is provided with an inlet (101) and an outlet (102), and a drive assembly (2) is provided on the tank (1), and a stirring assembly (3) is installed below the drive assembly (2). The stirring assembly (3) includes a sleeve (31) and a drive shaft (32). A first magnetic component and a reciprocating cylinder (311) are installed on the sleeve (31) in sequence. A second magnetic component is provided on one side of the reciprocating cylinder (311), and a first stirring blade (312) is rotatably provided on the other side of the reciprocating cylinder (311). The upper end of the drive shaft (32) is connected to the drive assembly (2), and the lower end of the drive shaft (32) is connected to the first stirring blade (312) through the telescopic assembly (33).
2. The raw material stirring device for the production and processing of dicalcium phosphate according to claim 1, characterized in that: The telescopic assembly (33) includes a rotating cylinder (331) and a sliding cylinder (332). The rotating cylinder (331) and the sliding cylinder (332) are respectively disposed on the drive shaft (32) and the first stirring blade (312). The rotating cylinder (331) and the sliding cylinder (332) are respectively provided with protrusions and grooves, which are engaged with each other. A number of balls are provided in both the protrusions and the grooves.
3. The raw material stirring device for the production and processing of dicalcium phosphate according to claim 1, characterized in that: The first stirring blade (312) is made of metal. A temperature sensing element is provided on the inner wall of the tank (1). The temperature sensing element is electrically connected to the control system. An anti-stick coating is provided on the surface of the first stirring blade (312).
4. The raw material stirring device for the production and processing of dicalcium phosphate according to claim 1, characterized in that: The sleeve (31) is provided with a second stirring blade (314) on the outside. The first stirring blade (312) and the second stirring blade (314) are in opposite directions. The first stirring blade (312) and the second stirring blade (314) are both made of metal. The inner wall of the tank (1) is provided with a temperature sensing element. The temperature sensing element is electrically connected to the control system. The surfaces of the first stirring blade (312) and the second stirring blade (314) are both provided with an anti-stick coating.
5. A raw material stirring device for the production and processing of dicalcium phosphate according to claim 3 or 4, characterized in that: The first stirring blade (312) has a cavity inside, and the cavity is filled with heat-conducting oil.
6. The raw material stirring device for the production and processing of dicalcium phosphate according to claim 1, characterized in that: A filter assembly (4) is installed below the first stirring blade (312). The filter assembly (4) includes a top plate (41), a filter screen (42), and a bottom plate (43). The top plate (41) and the bottom plate (43) are connected by a support shaft. The bottom plate (43) is set on the tank body (1), and the filter screen (42) is set between the top plate (41) and the bottom plate (43). The bottom plate (43) located inside the filter screen (42) is connected to the inlet of a pump via a drain pipe, and the pump is mounted on the tank (1).
7. The raw material stirring device for the production and processing of dicalcium phosphate according to claim 6, characterized in that: The bottom of the first stirring blade (312) is provided with a vertical shaft that passes through the top plate (41) and is connected to the filter screen (42). A sliding seal connection is formed between the vertical shaft and the top plate (41).
8. The raw material stirring device for the production and processing of dicalcium phosphate according to claim 7, characterized in that: The vertical shaft is hollow inside and has a spray nozzle for spraying cleaning fluid. The interior of the vertical shaft is connected to the middle of the drain pipe through a connecting pipe. Solenoid valves and flow meters are installed in the inlets of both the connecting pipe and the drain pipe. The solenoid valves and flow meters are electrically connected to the control system.
9. A raw material stirring device for the production and processing of dicalcium phosphate according to claim 8, characterized in that: The filter screen (42) has a number of pleats and is elastic.
10. A raw material stirring device for the production and processing of dicalcium phosphate according to claim 1, characterized in that: The sleeve (31) is disposed on the tank body (1), and the sleeve (31) and the reciprocating cylinder (311) are connected by a spline. The drive shaft (32) is rotatably disposed on the tank body (1). The drive assembly (2) includes a drive motor (21), the output end of which is connected to a transmission shaft (32), and the drive motor (21) is mounted on the tank body (1).