A high shear agitator for AKD condensation production

Abstract

The utility model relates to fine chemical equipment technical field discloses a high shear agitator of AKD condensation production, including heating box, the inside fixedly connected with agitator tank of heating box, be provided with stirring mechanism in the agitator tank, the top of agitator tank is provided with lubricating mechanism, the stirring mechanism includes motor, the motor is installed in the top of agitator tank, the motor output fixedly connected with bevel gear no.

Description

Technical Field

[0001] This utility model relates to the field of fine chemical equipment technology, and in particular to a high-shear agitator for AKD condensation production. Background Technology

[0002] With the increasing demands for paper quality in the modern papermaking industry, the production processes and equipment for AKD (alkyl ketene dimer) emulsion, a key sizing agent, are also continuously evolving. The high-shear agitator is a core piece of equipment in the AKD emulsification production process. It applies strong mechanical shear and dispersion forces to the materials, preparing a stable and homogeneous emulsion from solid AKD wax and water under heating conditions. The quality of this agitator directly affects the particle size distribution, stability, and sizing effect of the final AKD emulsion, making it a crucial factor in determining product quality.

[0003] However, existing high-shear agitators still have some shortcomings in practical applications that urgently need improvement. On the one hand, the traditional single-shaft agitation structure easily forms a central vortex inside the tank, resulting in insufficient material tumbling and dead zones at the edges, leading to poor mixing uniformity. Simultaneously, during heating and stirring, some material tends to adhere to the inner wall of the tank, which not only reduces heat transfer efficiency but may also cause batch-to-batch quality fluctuations. On the other hand, the core transmission gears of this type of equipment need to operate at high speeds for extended periods, making wear a significant issue. Current lubrication methods mostly rely on manual, periodic addition of lubricating oil, which is highly susceptible to human negligence or untimely maintenance, leading to insufficient gear lubrication, thus accelerating wear and severely impacting the operational stability and overall service life of the equipment.

[0004] To address these issues, a high-shear agitator for AKD condensation production is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a high-shear mixer for AKD condensation production, which aims to improve the problems of poor mixing uniformity, easy material sticking to the wall, easy wear of various transmission bevel gears and untimely lubrication by operators in existing equipment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high-shear stirrer produced by AKD condensation, comprising a heating box, a stirring tank fixedly connected inside the heating box, a stirring mechanism inside the stirring tank, and a lubrication mechanism on the top of the stirring tank;

[0007] The stirring mechanism includes a motor mounted on the top of the stirring tank. A second bevel gear is fixedly connected to the output end of the motor. A third connecting column is fixedly connected to the top of the second bevel gear. A first connecting column is fixedly connected to the bottom of the second bevel gear. A third bevel gear is fixedly connected to the end of the third connecting column away from the second bevel gear. A first bevel gear is fixedly connected to the end of the first connecting column away from the second bevel gear. A second rotating shaft is fixedly connected to the middle of the third bevel gear. A first rotating shaft is fixedly connected to the middle of the first bevel gear. A second connecting column is fixedly connected to the outer sides of both the first and second rotating shafts. An anti-sticking component is provided at one end of the second connecting column. High-shear blades are fixedly connected to the outer sides of both the first and second rotating shafts.

[0008] As a further description of the above technical solution:

[0009] The lubrication mechanism includes a sleeve, which is fixedly connected to the top of the mixing tank. A second spring is installed inside the sleeve, and a piston is slidably connected inside the sleeve. A push rod is fixedly connected to one side of the piston. A cam is fixedly connected to the output end of the motor. A first oil supply pipe and a second oil supply pipe are fixedly connected to the outside of the sleeve. An oil storage tank is fixedly connected to the top of the mixing tank, and the end of the second oil supply pipe away from the sleeve is fixedly connected to the outside of the oil storage tank.

[0010] As a further description of the above technical solution:

[0011] The anti-sticking component includes a housing, which is fixedly connected to one end of the connecting post 2. Multiple springs are provided inside the housing, and a limiting plate is slidably connected inside the housing. A scraper is fixedly connected to one side of the limiting plate.

[0012] As a further description of the above technical solution:

[0013] Both the third bevel gear and the first bevel gear mesh with the second bevel gear. The rotating shaft is fitted on the outside of the second rotating shaft. A protective shell is fixedly connected to the top of the mixing tank. The motor output end passes through one side of the protective shell.

[0014] As a further description of the above technical solution:

[0015] The first oil delivery pipe is fixedly connected to a one-way valve, and the second oil delivery pipe is fixedly connected to an electromagnetic one-way valve. The end of the first oil delivery pipe away from the sleeve is located directly above the second bevel gear.

[0016] As a further description of the above technical solution:

[0017] One end of the push rod abuts against the surface of the cam, and the push rod is slidably connected inside the sleeve.

[0018] As a further description of the above technical solution:

[0019] The scraper is slidably connected inside the outer shell, and one side of the scraper abuts against the inner wall of the mixing tank.

[0020] As a further description of the above technical solution:

[0021] The bottom of the mixing tank is fixedly connected to a discharge port, and the top of the mixing tank is fixedly connected to a feed port.

[0022] This utility model has the following beneficial effects:

[0023] 1. This utility model employs a dual-shaft counter-rotating stirring mechanism. It uses bevel gear two to simultaneously drive bevel gear one and bevel gear three, achieving opposite movements of shaft one and shaft two. Combined with high-shear blades, this creates a strong shearing and tearing field within the tank. This design achieves efficient and uniform mixing of materials. Compared to the single-shaft stirrers commonly found in existing technologies, it completely solves the problems of eddy currents and uneven mixing due to dead zones inherent in single-shaft rotation. Furthermore, the elastic scraper remains constantly against the tank wall for cleaning, preventing material adhesion and resulting in poor heat transfer or incomplete localized reactions, thus ensuring batch-to-batch stability of the final product.

[0024] 2. In this invention, a cam is driven to rotate by a motor, and the restoring potential energy of a spring is cleverly combined to drive a piston to perform a reciprocating pumping action within the sleeve. This achieves the function of automatically drawing lubricating fluid from the oil tank and precisely delivering it to the meshing points of the bevel gears. This achieves the technical effect of continuous and precise lubrication of each bevel gear, which is crucial for ensuring the long-term, high-intensity, and stable operation of the equipment. Compared to the commonly used manual periodic oiling or offline maintenance methods in existing technologies, this solution fundamentally solves the problem of lubrication failure caused by untimely maintenance or human negligence, effectively avoiding the risk of abnormal wear or even failure of the gear system, and greatly enhancing the reliability and durability of the equipment. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a high-shear agitator for AKD condensation production proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of a high-shear agitator for AKD condensation production proposed in this utility model;

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0029] Figure 5 This is a schematic diagram of the sleeve structure of a high-shear agitator for AKD condensation production proposed in this utility model;

[0030] Figure 6 This is a schematic diagram of the high-shear blades of a high-shear agitator produced by AKD condensation according to the present invention.

[0031] Legend:

[0032] 1. Oil storage tank; 2. Motor; 3. Heating box; 4. Mixing tank; 5. Protective shell; 6. First oil delivery pipe; 7. Check valve; 8. Sleeve; 9. Connecting column one; 10. Rotating shaft one; 11. Connecting column two; 12. Bevel gear one; 13. Bevel gear two; 14. Bevel gear three; 15. Connecting column three; 16. Scraper; 17. Limiting plate; 18. Spring one; 19. Outer shell; 20. Cam; 21. Push rod; 22. Piston; 23. Spring two; 24. Oil delivery pipe two; 25. Electromagnetic check valve; 26. Rotating shaft two; 27. High shear blade. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figures 1-6 One embodiment of this utility model is a high-shear mixer produced by AKD condensation, which includes a heating box 3, a mixing tank 4 fixedly connected inside the heating box 3, a mixing mechanism inside the mixing tank 4, and a lubrication mechanism on the top of the mixing tank 4.

[0035] The stirring mechanism includes a motor 2, which is mounted on top of the mixing tank 4. A second bevel gear 13 is fixedly connected to the output end of the motor 2. A third connecting column 15 is fixedly connected to the top of the second bevel gear 13. A first connecting column 9 is fixedly connected to the bottom of the second bevel gear 13. A third bevel gear 14 is fixedly connected to the end of the third connecting column 15 away from the second bevel gear 13. A first bevel gear 12 is fixedly connected to the end of the first connecting column 9 away from the second bevel gear 13. A second rotating shaft 26 is fixedly connected to the middle of the third bevel gear 14. A first rotating shaft 10 is fixedly connected to the middle of the first bevel gear 12. Both the first rotating shaft 10 and the second rotating shaft 26 are fixedly connected to the outer side of the connecting column 21. One end of the connecting column 21 is provided with an anti-sticking component. Both the first rotating shaft 10 and the second rotating shaft 26 are fixedly connected to the outer side of the connecting column 211. Both the third bevel gear 14 and the first bevel gear 12 are meshed with the second bevel gear 13. The first rotating shaft 10 is sleeved on the outer side of the second rotating shaft 26. The top of the mixing tank 4 is fixedly connected to the protective shell 5. The output end of the motor 2 passes through one side of the protective shell 5. The bottom of the mixing tank 4 is fixedly connected to the discharge port. The top of the mixing tank 4 is fixedly connected to the inlet port.

[0036] The main working container of this high-shear mixer for AKD condensation production is the mixing tank 4, where material feeding, mixing, and discharging are all completed. The surrounding heating box 3 is responsible for heating the material inside the tank to meet the temperature requirements of the production process. The entire mechanism is powered by a motor 2 mounted on top of the equipment. The output shaft of motor 2 drives the key transmission component, bevel gear 13, to rotate. Through connecting column 15 at the top and connecting column 9 at the bottom, bevel gears 14 and 12 are positioned in the correct working positions, respectively. Since bevel gears 14 and 12 simultaneously mesh with the central bevel gear 13, when bevel gear 13 rotates, it drives these two gears to rotate in opposite directions. This opposing rotational force is then transmitted to shaft 26, fixed in the middle of bevel gear 14, and shaft 10, fixed in the middle of bevel gear 12. Shaft 10 is fitted around shaft 26, forming a concentric, counter-rotating dual-shaft structure. High-shear blades 27, fixed to the outside of rotating shaft 10 and rotating shaft 26, generate powerful shearing, dispersing, and mixing effects on the material as the dual shafts rotate at high speed in opposite directions. Simultaneously, connecting column 2 11 is used to fix anti-stick components on the rotating shafts. To ensure safety and cleanliness, the entire gear transmission mechanism is enclosed inside a protective shell 5 on top of the mixing tank 4. Material is added through the top inlet and discharged from the bottom outlet after mixing, while the top lubrication mechanism is responsible for lubricating each bevel gear.

[0037] Reference Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6The lubrication mechanism includes a sleeve 8, which is fixedly connected to the top of the mixing tank 4. A spring 23 is installed inside the sleeve 8, and a piston 22 is slidably connected inside the sleeve 8. A push rod 21 is fixedly connected to one side of the piston 22. A cam 20 is fixedly connected to the output end of the motor 2. A first oil supply pipe 6 and an oil supply pipe 24 are fixedly connected to the outside of the sleeve 8. An oil storage tank 1 is fixedly connected to the top of the mixing tank 4. The end of the oil supply pipe 24 away from the sleeve 8 is fixedly connected to the outside of the oil storage tank 1. A one-way valve 7 is fixedly connected inside the first oil supply pipe 6, and an electromagnetic one-way valve 25 is fixedly connected inside the oil supply pipe 24. The end of the first oil supply pipe 6 away from the sleeve 8 is located directly above the bevel gear 13. One end of the push rod 21 abuts against the surface of the cam 20, and the push rod 21 is slidably connected inside the sleeve 8.

[0038] This lubrication mechanism is used to achieve timed automatic lubrication of gears. When lubrication is required, the electromagnetic check valve 25 located inside the oil inlet pipe 24 is activated and opened, allowing the lubricant to flow and starting the entire mechanism. The mechanism is powered by the main motor 2, and the cam 20 fixed at its output end rotates synchronously with the motor 2. The irregular outer surface of the cam 20 continuously abuts against one end of the push rod 21. When the cam 20 rotates, it periodically pushes the push rod 21, thereby driving the piston 22 connected to it to slide inside the sleeve 8 fixed to the top of the tank. When the piston 22 is pushed by the push rod 21, it compresses the spring 23 inside the sleeve 8; when the cam 20 passes the peak point, the elastic energy stored in the spring 23 pushes the piston 22 to return to its original position. This reciprocating motion causes piston 22 to act as a pump. During the reset process, it generates suction, drawing lubricant from oil reservoir 1 into sleeve 8 through oil delivery pipe 24. When pushed by cam 20, it generates thrust, forcing the lubricant out of sleeve 8 through first oil delivery pipe 6. To ensure unidirectional flow of the liquid, a one-way valve 7 inside the first oil delivery pipe 6 prevents backflow of lubricant. Finally, the end of the first oil delivery pipe 6 is precisely positioned above bevel gear 13, dripping lubricant onto the gear to complete the lubrication operation. When the solenoid one-way valve 25 closes, piston 22 stops inside sleeve 8.

[0039] Reference Figure 2 , Figure 3 , Figure 4 and Figure 6 The anti-stick component includes a housing 19, which is fixedly connected to one end of the connecting post 11. Multiple springs 18 are provided inside the housing 19. A limiting plate 17 is slidably connected inside the housing 19. A scraper 16 is fixedly connected to one side of the limiting plate 17. The scraper 16 is slidably connected inside the housing 19, and one side of the scraper 16 abuts against the inner wall of the mixing tank 4.

[0040] The core function of this anti-stick component is to continuously scrape away material adhering to the inner wall of the mixing tank 4 to ensure efficient heat transfer and mixing. This component is fixed to the rotating stirring mechanism via connecting column 11 and moves with the main shaft. Its main structure is the outer shell 19, and the scraper 16 is in direct contact with the inner wall of the mixing tank 4, responsible for performing the physical scraping action. To achieve flexible contact, multiple springs 18 are installed inside the outer shell 19. These springs continuously push the limiting plate 17, thereby applying a stable elastic thrust to the scraper 16 fixed to the limiting plate 17. This design allows the scraper 16 to always remain in close contact with the tank wall. Furthermore, since the scraper 16 and the limiting plate 17 behind it can slide inside the outer shell 19, the scraper 16 can adaptively adjust its extension and retraction when encountering uneven tank walls or stubborn deposits, ensuring effective scraping while avoiding potential damage to the tank wall from rigid contact.

[0041] Working principle: During the AKD production start-up phase, the required raw materials are first put into the mixing tank 4 through the designated inlet. At the same time, the external heating box 3 starts to heat up the tank to provide the necessary temperature conditions for material reaction or emulsification.

[0042] Once ready, the main motor 2 is started. Its power drives the cam 20 to rotate and the bevel gear 13 to rotate. The bevel gear 13 then drives the bevel gears 12 and 14, which are precisely meshed with it, to rotate synchronously. This, in turn, drives the shaft 10 and shaft 26 to rotate in opposite directions at high speed. As the dual shafts rotate, the high-shear blades 27 arranged on their outer sides exert a strong shearing, dispersing, and mixing effect on the material inside the tank.

[0043] During this process, in order to prevent material from adhering to the tank wall and affecting the mixing and heat transfer efficiency, the scraper 16 is always in close contact with the inner wall of the tank under the elastic action of the spring 18, and can slide and finely adjust within its outer shell 19, thereby effectively scraping off the adhering material while avoiding rigid damage to the tank wall.

[0044] To ensure the long-term stable operation of the transmission mechanism, when the lubrication program is initiated according to a preset cycle, such as monthly, the electromagnetic check valve 25 automatically opens. The cam 20 driven by the motor 2 periodically pushes the push rod 21, causing the piston 22 to complete a reciprocating suction action within the sleeve 8 under the reset action of the spring 23. This process draws the lubricating fluid from the oil reservoir 1 into the oil supply pipe 24, and then precisely drips it onto the core bevel gear 13 directly above it via the first oil supply pipe 6, providing sufficient lubrication to each bevel gear and significantly reducing wear caused by long-term operation.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 high-shear stirrer for AKD condensation production, comprising a heating chamber (3), characterized in that: The heating box (3) is fixedly connected to a stirring tank (4), the stirring tank (4) is equipped with a stirring mechanism, and the top of the stirring tank (4) is equipped with a lubrication mechanism; The stirring mechanism includes a motor (2), which is mounted on the top of the stirring tank (4). A bevel gear two (13) is fixedly connected to the output end of the motor (2). A connecting column three (15) is fixedly connected to the top of the bevel gear two (13). A connecting column one (9) is fixedly connected to the bottom of the bevel gear two (13). A bevel gear three (14) is fixedly connected to the end of the connecting column three (15) away from the bevel gear two (13). The connecting column one (9) is located away from the bevel gear three (14). A bevel gear (12) is fixedly connected to one end of the second (13). A rotating shaft (26) is fixedly connected to the middle of the bevel gear (14). A rotating shaft (10) is fixedly connected to the middle of the bevel gear (12). A connecting post (11) is fixedly connected to the outer side of both the rotating shaft (10) and the rotating shaft (26). An anti-adhesion component is provided at one end of the connecting post (11). A high-shear blade (27) is fixedly connected to the outer side of both the rotating shaft (10) and the rotating shaft (26).

2. The high-shear agitator for AKD condensation production according to claim 1, characterized in that: The lubrication mechanism includes a sleeve (8), which is fixedly connected to the top of the mixing tank (4). A second spring (23) is provided inside the sleeve (8). A piston (22) is slidably connected inside the sleeve (8). A push rod (21) is fixedly connected to one side of the piston (22). A cam (20) is fixedly connected to the output end of the motor (2). A first oil supply pipe (6) and an second oil supply pipe (24) are fixedly connected to the outside of the sleeve (8). An oil storage tank (1) is fixedly connected to the top of the mixing tank (4). The end of the second oil supply pipe (24) away from the sleeve (8) is fixedly connected to the outside of the oil storage tank (1).

3. The high-shear agitator for AKD condensation production according to claim 1, characterized in that: The anti-sticking component includes a housing (19), which is fixedly connected to one end of the connecting post (11). Multiple springs (18) are provided inside the housing (19). A limiting plate (17) is slidably connected inside the housing (19), and a scraper (16) is fixedly connected to one side of the limiting plate (17).

4. The high-shear agitator for AKD condensation production according to claim 1, characterized in that: The bevel gear three (14) and the bevel gear one (12) are both meshed with the bevel gear two (13). The rotating shaft one (10) is sleeved on the outside of the rotating shaft two (26). The top of the mixing tank (4) is fixedly connected to a protective shell (5). The output end of the motor (2) passes through one side of the protective shell (5).

5. A high-shear agitator for AKD condensation production according to claim 2, characterized in that: The first oil pipe (6) is fixedly connected to a one-way valve (7), and the second oil pipe (24) is fixedly connected to an electromagnetic one-way valve (25). The end of the first oil pipe (6) away from the sleeve (8) is located directly above the second bevel gear (13).

6. A high-shear agitator for AKD condensation production according to claim 2, characterized in that: One end of the push rod (21) abuts against the surface of the cam (20), and the push rod (21) is slidably connected inside the sleeve (8).

7. A high-shear agitator for AKD condensation production according to claim 3, characterized in that: The scraper (16) is slidably connected inside the outer shell (19), and one side of the scraper (16) abuts against the inner wall of the mixing tank (4).

8. A high-shear agitator for AKD condensation production according to claim 1, characterized in that: The bottom of the mixing tank (4) is fixedly connected to a discharge port, and the top of the mixing tank (4) is fixedly connected to a feed port.

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