Airflow coating device for mixing powder and liquid

Abstract

The utility model relates to an airflow coating device for mixing powder and liquid, which comprises a mixing tank, a powder conveyor and a nozzle assembly, the powder conveyor and the nozzle assembly are respectively communicated with two ends of the mixing tank, and the powder conveyor is used for conveying powder to the mixing tank; the nozzle assembly comprises a mounting plate, an impingement flow nozzle and a two-phase flow nozzle, the mounting plate is mounted at one end of the mixing tank, the impingement flow nozzle and the two-phase flow nozzle are both mounted on the mounting plate, the impingement flow nozzle is used for inputting the heated air into the mixing tank, and the two-phase flow nozzle is used for spraying the liquid and the heated air into the mixing tank. According to the airflow coating device, powder is conveyed through the powder conveyor, and hot air is input through the impact flow nozzle, so that the powder in the mixing tank fully flows, a mixing blind area is avoided, and the air in the mixing tank can be heated; and the liquid and the heated air are sprayed into the mixing tank through the two-phase flow nozzle, and the liquid is heated and atomized, so that the powder and the liquid are uniformly mixed and coated, and the mixing and coating efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of mixing technology, and in particular to an airflow coating device for mixing powder and liquid. Background Technology

[0002] Airflow coating equipment uses a powerful airflow to uniformly coat the surface of a target object with specific materials, achieving the purpose of protection, decoration, or enhancement of the object's properties. Airflow coating equipment has wide applications in various industries, such as plastics, rubber, coatings, pharmaceuticals, food, and cosmetics. In the pharmaceutical industry, powder coating modification technology is widely used in drug microencapsulation. By coating drug particles with a uniform and sufficiently thick thin film, sustained-release effects and masking mechanisms can be achieved, improving drug stability and bioavailability while reducing side effects. However, current airflow coating equipment inserts its air inlet directly from the side of the mixing tank, resulting in a mixing blind zone at the bottom of the equipment and poor mixing efficiency. Utility Model Content

[0003] Therefore, it is necessary to provide an airflow coating device for mixing powder and liquid with excellent mixing effect to address the above problems.

[0004] An airflow coating device for mixing powder and liquid includes a mixing tank, a powder conveyor, and a nozzle assembly. The powder conveyor and the nozzle assembly are respectively connected to the two ends of the mixing tank. The powder conveyor is used to convey powder into the mixing tank. The nozzle assembly includes a mounting plate, an impingement nozzle, and a two-phase flow nozzle. The mounting plate is installed at one end of the mixing tank. The impingement nozzle and the two-phase flow nozzle are both installed on the mounting plate. The impingement nozzle is used to input heated air into the mixing tank, and the two-phase flow nozzle is used to spray liquid and heated air into the mixing tank.

[0005] In one embodiment, the nozzle of the impingement nozzle is inclined toward the side wall of the mixing tank.

[0006] In one embodiment, the two-phase flow nozzle has a three-way structure, with the first end of the two-phase flow nozzle connected to an air heater, the second end connected to a liquid conveyor, and the third end connected to the mixing tank.

[0007] In one embodiment, there are multiple impingement flow nozzles and two-phase flow nozzles, and the impingement flow nozzles and two-phase flow nozzles are arranged alternately.

[0008] In one embodiment, the nozzle assembly further includes a conical filter screen mounted in the middle of the mounting plate, the conical filter screen covering one of the two-phase flow nozzles, and the other two-phase flow nozzles arranged around the periphery of the conical filter screen.

[0009] In one embodiment, the nozzle assembly further includes a gas-liquid nozzle installed within the mixing tank, the gas-liquid nozzle being disposed between the powder conveyor and the impingement nozzle, the gas-liquid nozzle being used to inject liquid and heated air into the mixing tank.

[0010] In one embodiment, the mixing tank includes a fixed part, a cylindrical part, a conical part, a feeding part, and a discharging part. The fixed part, the cylindrical part, and the conical part are connected in sequence. The feeding part and the discharging part are respectively connected to both sides of the fixed part. The powder conveyor is installed on the fixed part, and the mounting plate is installed on the end of the conical part away from the cylindrical part.

[0011] In one embodiment, the powder conveyor includes a support section, a filter element section, a cover plate section, and a suction section. The support section is installed at one end of the fixing section away from the cylinder section, one end of the filter element section is installed on the support section, the cover plate section covers the support section, and the suction section communicates with the cover plate section.

[0012] In one embodiment, a heating element is also included, which covers the outer sides of the cylindrical portion and the conical portion.

[0013] In one embodiment, a vibrator is also included, which is mounted on the side wall of the mixing tank.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This utility model discloses an airflow coating device for mixing powder and liquid. The powder is conveyed into the mixing tank by a powder conveyor, and hot air is introduced through an impact flow nozzle to make the powder in the mixing tank flow fully, avoid the existence of mixing blind zones, and heat the air in the mixing tank. Then, the liquid and heated air are injected into the mixing tank through a two-phase flow nozzle. The liquid is heated and atomized, so that the powder and liquid are mixed and coated evenly, improving the mixing and coating efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an airflow coating device for mixing powder and liquid, as shown in one embodiment of the present invention;

[0017] Figure 2 for Figure 1 A sectional view along line AA.

[0018] Figure 3 for Figure 2 Enlarged view of center circle B;

[0019] Figure 4 for Figure 1 The diagram shows the structure of the mounting plate, impingement nozzle, and two-phase flow nozzle in the airflow coating device for mixing powder and liquid.

[0020] The meanings of the numbers in the attached diagram are as follows:

[0021] 100. An airflow coating device for mixing powder and liquid;

[0022] 10. Mixing tank; 11. Fixing part; 12. Cylinder part; 13. Conical part; 14. Feeding part; 15. Discharge part; 20. Powder conveyor; 21. Support part; 22. Filter element part; 23. Cover plate part; 24. Suction part; 30. Nozzle assembly; 31. Mounting plate; 32. Impact flow nozzle; 33. Two-phase flow nozzle; 34. Conical filter screen; 35. Gas-liquid nozzle; 40. Heating element; 50. Vibrator. Detailed Implementation

[0023] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0029] Please refer to Figures 1 to 4The utility model discloses an airflow coating device 100 for mixing powder and liquid, comprising a mixing tank 10, a powder conveyor 20, and a nozzle assembly 30. The powder conveyor 20 and the nozzle assembly 30 are respectively connected to the two ends of the mixing tank 10. The powder conveyor 20 is used to convey powder to the mixing tank 10. The nozzle assembly 30 includes a mounting plate 31, an impact flow nozzle 32, and a two-phase flow nozzle 33. The mounting plate 31 is installed at one end of the mixing tank 10. The impact flow nozzle 32 and the two-phase flow nozzle 33 are both installed on the mounting plate 31. The impact flow nozzle 32 is used to input heated air into the mixing tank 10, and the two-phase flow nozzle 33 is used to spray liquid and heated air into the mixing tank 10. The airflow coating device 100 for mixing powder and liquid conveys powder into the mixing tank 10 via the powder conveyor 20. Hot air is introduced through the impact flow nozzle 32 to ensure that the powder in the mixing tank 10 flows fully, avoiding the existence of mixing blind zones and heating the air in the mixing tank 10. Then, liquid and heated air are injected into the mixing tank 10 through the two-phase flow nozzle 33. The liquid is heated and atomized, so that the powder and liquid are mixed and coated evenly, improving the mixing and coating efficiency.

[0030] like Figure 1 and Figure 2 As shown, in this embodiment, the mixing tank 10 includes a fixing part 11, a cylindrical part 12, a conical part 13, a feeding part 14, and a discharging part 15. The fixing part 11, the cylindrical part 12, and the conical part 13 are connected in sequence, and the feeding part 14 and the discharging part 15 are respectively connected to both sides of the fixing part 11.

[0031] Please check again. Figure 1 and Figure 2 The powder conveyor 20 and the nozzle assembly 30 are respectively connected to both ends of the mixing tank 10. The powder conveyor 20 is used to convey powder to the mixing tank 10. Optionally, the powder conveyor 20 is installed on the fixed part 11 and is a vacuum conveyor. Further, the powder conveyor 20 includes a support part 21, a filter element part 22, a cover plate part 23 and a suction part 24. The support part 21 is installed on the end of the fixed part 11 away from the cylinder part 12. One end of the filter element part 22 is installed on the support part 21. The cover plate part 23 covers the support part 21 and the suction part 24 is connected to the cover plate part 23. Further, there are multiple filter elements 22, and each filter element part 22 is installed on the support part 21. In use, the suction part 24 draws air, so that the powder enters the mixing tank 10 through the feed part 14. Under the action of the filter element part 22, the powder remains in the mixing tank 10.

[0032] like Figure 3 and Figure 4As shown, the nozzle assembly 30 includes a mounting plate 31, an impingement nozzle 32, and a two-phase flow nozzle 33. The mounting plate 31 is mounted at one end of the mixing tank 10. Both the impingement nozzle 32 and the two-phase flow nozzle 33 are mounted on the mounting plate 31. The impingement nozzle 32 is used to introduce heated air into the mixing tank 10, allowing the powder in the mixing tank 10 to flow fully, avoiding mixing blind zones, and heating the air in the mixing tank 10. The two-phase flow nozzle 33 is used to spray liquid and heated air into the mixing tank 10, where the liquid is heated and atomized, so that the powder and liquid can be coated. Optionally, the mounting plate 31 is mounted at the end of the conical portion 13 away from the cylindrical portion 12. Further, there are multiple impingement nozzles 32 and two-phase flow nozzles 33, and the impingement nozzles 32 and two-phase flow nozzles 33 are arranged alternately. Furthermore, the impingement flow nozzles 32 and the two-phase flow nozzles 33 are evenly distributed around the center of the mounting plate 31 to ensure that there are no mixing blind spots within the mixing tank 10; preferably, the nozzle heads of the impingement flow nozzles 32 are inclined toward the side wall of the mixing tank 10. In one embodiment, the two-phase flow nozzle 33 has a three-way structure, with the first end connected to an air heater, the second end connected to a liquid conveyor, and the third end connected to the mixing tank 10; the air heater delivers heated air to the two-phase flow nozzle 33, and the liquid conveyor delivers liquid to the two-phase flow nozzle 33, where the liquid is atomized under the high temperature of the hot air.

[0033] like Figure 2 As shown, the nozzle assembly 30 also includes a conical filter screen 34, which is installed in the middle of the mounting plate 31. The conical filter screen 34 covers one of the two-phase flow nozzles 33, and airflow is sprayed towards the conical filter screen 34 through the two-phase flow nozzle 33 to prevent the conical filter screen 34 from clogging. Other two-phase flow nozzles 33 are arranged around the periphery of the conical filter screen 34. The nozzle assembly 30 also includes a gas-liquid nozzle 35 installed in the mixing tank 10. The gas-liquid nozzle 35 is located between the powder conveyor 20 and the impingement flow nozzle 32. The gas-liquid nozzle 35 is used to inject liquid and heated air into the mixing tank 10. Optionally, the gas-liquid nozzle 35 is located in the cylinder section 12. The gas-liquid nozzle 35 sprays atomized liquid downwards, and the two-phase flow nozzle 33 sprays atomized liquid upwards to ensure that the liquid and powder are fully mixed.

[0034] like Figure 1 As shown, the airflow coating device 100 for mixing powder and liquid also includes a heating element 40, which covers the outer side of the cylindrical part 12 and the conical part 13 to ensure that the mixing tank 10 maintains a high temperature and makes the liquid atomized; optionally, the heating element 40 is an electric heating blanket.

[0035] like Figure 1As shown, the airflow coating device 100 for mixing powder and liquid also includes a vibrator 50, which is installed on the side wall of the mixing tank 10. The vibration of the vibrator 50 prevents the powder from accumulating on the side wall of the mixing tank 10. Optionally, the vibrator 50 is installed on the conical part 13.

[0036] In operation, the valve of the feed section 14 is opened, and the valve of the discharge section 15 is closed. The powder conveyor 20 starts working, sucking the powder into the mixing tank 10 until the powder is filled to the predetermined level. At this point, the powder conveyor 20 stops working, and the valve of the feed section 14 is closed. Next, the impingement nozzle 32 sprays heated air into the mixing tank 10, allowing the powder to flow fully. Then, the impingement nozzle 32 stops working, and the liquid and heated air enter the two-phase flow nozzle 33 respectively, and are then injected into the mixing tank 10. The high temperature atomizes the liquid, achieving mixing of the powder and liquid. Optionally, the liquid and heated air enter the gas-liquid nozzle 35 respectively, and are then injected into the mixing tank 10. By intermittently alternating the operation of the impingement nozzle 32 and the two-phase flow nozzle 33, the powder and liquid are circulated and mixed until the predetermined mixing time is reached. Finally, the valve of the discharge section 15 is opened, and the mixed and coated product is discharged into the material tank through the discharge section 15.

[0037] The airflow coating device 100 for mixing powder and liquid introduces hot air through the impingement nozzle 32, allowing the powder in the mixing tank 10 to flow fully. Then, the liquid and heated air are injected into the mixing tank 10 through the two-phase flow nozzle 33. The liquid is heated and atomized, resulting in short mixing and coating time, high efficiency, and uniform mixing. Furthermore, the hot air is introduced through the impingement nozzle 32 and the two-phase flow nozzle 33, and the heating element 40 heats the mixing tank 10, keeping it at a high temperature, which further atomizes the liquid. The powder and liquid expand due to heat, resulting in uniform coating. The precise metering and feeding of powder and liquid ensures high mixing accuracy.

[0038] The airflow coating device 100 for mixing powder and liquid of this utility model conveys powder into mixing tank 10 through powder conveyor 20, and hot air is introduced through impact flow nozzle 32 to make the powder in mixing tank 10 flow fully, avoid the existence of mixing blind zone, and heat the air in mixing tank 10; then liquid is sprayed into mixing tank 10 through two-phase flow nozzle 33, the liquid is heated and atomized, so that the powder and liquid are mixed and coated evenly, improving the mixing and coating efficiency.

[0039] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A gas stream coating device for mixing a powder with a liquid, characterized in that, The device comprises a mixing tank, a powder conveyor and a nozzle assembly, the powder conveyor and the nozzle assembly are communicated with two ends of the mixing tank respectively, the powder conveyor is used for conveying powder to the mixing tank, the nozzle assembly comprises a mounting plate, an impinging stream nozzle and a two-phase flow nozzle, the mounting plate is installed at one end of the mixing tank, the impinging stream nozzle and the two-phase flow nozzle are installed on the mounting plate, the impinging stream nozzle is used for inputting heated air into the mixing tank, and the two-phase flow nozzle is used for spraying liquid and heated air into the mixing tank.

2. The apparatus for pneumatically coating a powder with a liquid according to claim 1, wherein, The nozzle head of the impinging stream nozzle is obliquely arranged towards the side wall of the mixing tank.

3. The apparatus for pneumatically coating a powder with a liquid of claim 1, wherein, The two-phase flow nozzle is a tee structure, the first end of the two-phase flow nozzle is communicated with an air heater, the second end is communicated with a liquid conveyor, and the third end is communicated with the mixing tank.

4. The apparatus for pneumatically coating a powder with a liquid of claim 1, wherein, The impinging stream nozzle and the two-phase flow nozzle are both multiple, and the impinging stream nozzle and the two-phase flow nozzle are staggered.

5. The apparatus for pneumatically coating a powder with a liquid of claim 4, wherein, The nozzle assembly further comprises a conical filter screen, the conical filter screen is installed in the middle of the mounting plate, the conical filter screen covers one of the two-phase flow nozzles, and the other two-phase flow nozzles are arranged around the periphery of the conical filter screen.

6. The apparatus for pneumatically coating a powder with a liquid of claim 1, wherein, The nozzle assembly further comprises a gas-liquid nozzle installed in the mixing tank, the gas-liquid nozzle is arranged between the powder conveyor and the impinging stream nozzle, and the gas-liquid nozzle is used for spraying liquid and heated air into the mixing tank.

7. The apparatus for pneumatically coating a powder with a liquid of claim 1, wherein, The mixing tank comprises a fixed part, a barrel part, a cone part, a feeding part and a discharging part, the fixed part, the barrel part and the cone part are communicated in sequence, the feeding part and the discharging part are communicated with two sides of the fixed part respectively, the powder conveyor is installed on the fixed part, and the mounting plate is installed on one end of the cone part away from the barrel part.

8. The apparatus for pneumatically coating a powder with a liquid of claim 7, wherein, The powder conveyor comprises a support part, a filter core part, a cover plate part and a suction part, one end of the support part is installed on one end of the fixed part away from the barrel part, one end of the filter core part is installed on the support part, the cover plate part covers the support part, and the suction part is communicated with the cover plate part.

9. The apparatus for pneumatically coating a powder with a liquid of claim 7, wherein, The device further comprises a heating element, the heating element covers the outside of the barrel part and the cone part.

10. The apparatus for pneumatically coating a powder with a liquid of claim 1, wherein, The device further comprises a vibrator, the vibrator is installed on the side wall of the mixing tank.

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