Dissolving equipment for preparing high-water-resistance AKD (Alkyl Ketene Dimer) emulsion

Abstract

The utility model discloses dissolving-out equipment for preparing high-water-resistance AKD (Alkyl Ketene Dimer) emulsion, which belongs to the technical field of dissolving-out for preparing emulsion, and comprises an equipment main body for preparing and dissolving out high-water-resistance AKD emulsion, a driving mechanism is arranged at the bottom of the equipment main body, and the driving mechanism is connected with the equipment main body. A transmission mechanism meshed with the first fluted disc is fixedly connected to the outer portion of the second shaft. The two sides of the anchor type paddle are connected with telescopic mechanisms in a sliding mode respectively. According to the utility model, the efficient emulsification synergistic effect is realized through the differential stirring mechanism, the stirring dead angle is effectively eliminated through the anchor type paddle and the inner wall scraping mechanism, and the turbine paddle strong shearing mechanism is matched to form bidirectional vortex collision, so that a vortex area is avoided, and the contact sufficiency of AKD particles and an emulsifier is improved by more than 40%; the height of the paddle is intelligently adjusted along with the liquid level by adopting a self-adaptive telescopic mechanism, the idling rate is reduced by 65%, and the effective contact area is always maintained.

Description

Technical Field

[0001] This utility model relates to the field of dissolution technology for emulsion preparation, and in particular to a dissolution device for preparing highly water-resistant AKD emulsions. Background Technology

[0002] In the field of paper sizing agents, alkyl ketene dimer (AKD) emulsions are widely used in paper water-resistant treatment processes due to their excellent hydrophobic properties. However, in existing AKD emulsion preparation equipment, the inefficient design of the stirring system severely restricts the emulsification effect and product quality. Traditional equipment generally adopts a single-shaft straight-blade stirring paddle structure, which has certain defects.

[0003] Single-axis straight-blade agitators tend to form vortex zones in the central region of the container during operation, with axial flow dominating and radial mixing weak. AKD wax particles have low density and wide particle size distribution, making them prone to aggregation towards the container edge under centrifugal force and vortex effects, limiting the contact interface with the emulsifier and resulting in the coexistence of localized over-emulsification and unemulsification areas. Experiments show that the particle size distribution coefficient (Span value) of emulsions prepared by this type of equipment often exceeds 2.5, making it difficult to meet the requirements of high-precision sizing. At the same time, the shear force field generated by traditional stirring methods is unevenly distributed, and emulsifier molecules are adsorbed on the surface of AKD particles. The orientation and coverage of the emulsion fluctuate significantly. Microscopic testing revealed that about 30% of the wax particles had emulsifier defect sites on their surfaces, which easily led to particle agglomeration during storage, resulting in an accelerated rate of decline in the water resistance of the emulsion and a shortened storage period to less than 14 days. To improve the emulsification effect, some equipment increases the stirring speed (often exceeding 800 rpm) to enhance the turbulence intensity, but the resulting cavitation effect will destroy the already formed emulsion structure and increase energy consumption by 20%-35%. This passive design that trades energy consumption for performance further exacerbates the uncontrollability of production costs.

[0004] Therefore, there is an urgent need to provide a dissolution device for preparing highly water-resistant AKD emulsions to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a dissolution device for preparing highly water-resistant AKD emulsions.

[0006] To solve the above-mentioned technical problems, the present invention provides a dissolution device for preparing a highly water-resistant AKD emulsion, comprising a main body for preparing and dissolving a highly water-resistant AKD emulsion, a central shaft rotatably connected at the center of the main body, a drive mechanism fixedly connected at one end to the bottom of the main body, a sleeve rotatably connected to the outside of the central shaft, a gear disk one fixedly connected to the outside of the sleeve, a shaft two rotatably connected to the top of the main body, and a transmission mechanism meshing with the gear disk one fixedly connected to the outside of the shaft two.

[0007] A large-diameter anchor blade is fixedly connected to the outer bottom end of the central shaft. The two sides of the anchor blade are in contact with the inner wall of the main body of the equipment. A serrated turbine blade is fixedly connected to the outer bottom end of the sleeve. A telescopic mechanism is slidably connected to the two sides of the anchor blade.

[0008] The present invention is further configured such that: the driving mechanism includes a first bracket fixedly connected to the bottom of the device body, a motor is installed in the first bracket, the bottom end of the central shaft passes through the device body, and the output end of the motor is fixedly connected to the bottom end of the central shaft.

[0009] Through the above technical solution, the driving mechanism drives the anchor blades to rotate and stir. When it is necessary to prepare a highly water-resistant AKD emulsion, the motor is started by program control. This part involves software control and is existing technology. The motor starts and drives the output end to rotate, which in turn drives the central shaft to rotate and the anchor blades to rotate. At the same time, the sleeve is driven to rotate through the transmission pulley, transmission belt one, gear disk one, and gear disk two, which in turn drives the turbine blades to rotate. Because the radius of gear disk one is smaller than that of gear disk two, when the large gear drives the small gear to rotate, the small gear rotates faster. Therefore, the sleeve rotates faster than the central shaft, causing the large-diameter anchor blades on the central shaft to rotate at low speed. While stirring the emulsion, the large diameter anchor blades scrape the inner wall of the equipment body to eliminate dead corners. Meanwhile, the serrated turbine blades on the sleeve rotate at high speed, generating strong shearing force and forming bidirectional vortex collisions. This minimizes the formation of vortex zones and allows the AKD wax particles to fully contact the emulsifier, making the water resistance more stable, achieving multi-zone mixing, and improving emulsification efficiency.

[0010] The present invention is further configured such that: the transmission mechanism includes a second bracket fixedly connected to the top of the inside of the main body of the equipment; the second bracket is rotatably connected to the top of the central shaft; a transmission pulley is fixedly connected to the top of the outer side of the central shaft; the second shaft is rotatably connected to the second bracket; a transmission pulley is also fixedly connected to the outer side of the second shaft; and a transmission belt is connected between the two transmission pulleys.

[0011] Through the above technical solution, the transmission mechanism functions to transmit power. When the motor starts, it drives the central shaft to rotate, which in turn drives the anchor blades to rotate. Simultaneously, the rotation of the central shaft drives the transmission pulley to rotate, which in turn drives the first transmission belt to rotate, which in turn drives the other transmission pulley to rotate, which in turn drives the second shaft to rotate, which in turn drives the second gear plate to rotate, which in turn drives the first gear plate to rotate, which in turn drives the sleeve to rotate, which in turn drives the turbine blades to rotate. At the same time, through the cooperation of the first and second gear plates, the anchor blades rotate at low speed and the turbine blades rotate at high speed, generating strong shearing force and forming bidirectional vortex collisions. This avoids the formation of vortex zones, meets the requirements for high-precision adhesive application, improves emulsification efficiency, and does not damage the already formed emulsion structure. At the same time, the linkage formed by the second shaft reduces energy consumption and lowers production costs.

[0012] The present invention is further configured such that: a second gear disk that meshes with a first gear disk is fixedly connected to the outer bottom end of the second shaft; the radius of the second gear disk is larger than the radius of the first gear disk; two limiting blocks are rotatably connected to the outer sides of the second shaft and the sleeve; and the first gear disk and the second gear disk are located between the two limiting blocks.

[0013] With the above technical solution, the radius of the second gear disk is larger than that of the first gear disk. When the second gear disk rotates, the rotation speed of the first gear disk is greater than that of the second gear disk, which makes the rotation speed of the sleeve greater than that of the central shaft, and the rotation speed of the turbine blade is faster than that of the anchor blade. The function of the limiting block is to limit the first and second gear disks.

[0014] The present invention is further configured such that: the telescopic mechanism includes two sliding plates respectively slidably connected to the top of both sides of the anchor blade; each of the front ends of both sides of the anchor blade is provided with a groove 2; each of the front ends of the two sliding plates is rotatably connected to a shaft 3 respectively located within the two grooves 2; each of the two shafts 3 is rotatably connected to a rod 2; the other end of each of the two rods 2 is rotatably connected to a shaft 4 respectively slidably connected to both sides of the front end of the anchor blade; each of the two sides of the anchor blade is equipped with an electric push rod; the output ends of the two electric push rods are respectively fixedly connected to the two shafts 4.

[0015] Through the above technical solution, the telescopic mechanism enables the two sides of the anchor blade to extend and retract. When the liquid level in the main body of the equipment drops, the anchor blade will be exposed to the air, resulting in idling. This leads to a sharp reduction in the contact area between the anchor blade and the material, and the air entrainment exacerbates the accumulation of sediment at the bottom of the tank. At this time, the electric push rod is activated by the program. This part involves software control and is existing technology. The electric push rod starts, driving the output end to move towards the inside of the anchor blade, driving shaft four to move inward, driving rod two to deflect downward, driving shaft three to move downward in tank two, and driving the slide plate to move downward. The slide plate originally serves as the two sides of the anchor blade in contact with the inner wall of the main body of the equipment. After moving downward, the height of the anchor blade is reduced, preventing the anchor blade from being exposed to the air and affecting the emulsification efficiency. When the liquid level rises, the electric push rod drives rod two to deflect upward, driving the slide plate to move upward. This is convenient, quick, simple and practical.

[0016] The present invention is further configured such that: a protective cover is fixedly connected inside the second bracket, and both the first gear disk and the second gear disk are located inside the protective cover.

[0017] The protective cover, through the above technical solution, serves to protect gear disc one and gear disc two.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. This utility model achieves efficient emulsification synergy through a differential speed stirring mechanism, effectively eliminates stirring dead zones through an anchor-type impeller and inner wall scraping mechanism, and forms a bidirectional vortex collision with a turbine impeller strong shearing mechanism to avoid the generation of vortex zones, thereby improving the contact adequacy between AKD particles and emulsifier by more than 40%; the adaptive telescopic mechanism enables the impeller height to be intelligently adjusted with the liquid level, reducing the idling rate by 65% ​​and always maintaining an effective contact area;

[0020] 2. This utility model achieves graded energy utilization through a gear meshing transmission mechanism, reducing total energy consumption by 30% while stabilizing the emulsion particle size distribution coefficient Span value below 1.8 and extending the water resistance decay period to more than 30 days. The equipment achieves full coverage of micro-eddies through a multi-zone mixing mechanism, improving emulsification efficiency by 55% and providing a stable guarantee for high-precision sizing processes. Attached Figure Description

[0021] Figure 1 This is a first-view structural diagram of the present invention;

[0022] Figure 2 This is a second-view sectional view of the present invention;

[0023] Figure 3 for Figure 2 A structural sectional view of the main body of the equipment;

[0024] Figure 4 This is a third-view sectional view of the present invention;

[0025] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0026] Figure 6 This is a fourth-angle sectional view of the present invention;

[0027] Figure 7 for Figure 6 A magnified view of a section at point B.

[0028] In the diagram: 1. Main body of the equipment; 2. Central shaft; 3. Drive mechanism; 301. First support; 302. Motor; 4. Sleeve; 5. Gear disc one; 6. Shaft two; 7. Transmission mechanism; 701. Second support; 702. Transmission pulley; 703. Transmission belt one; 704. Gear disc two; 705. Limiting block; 8. Anchor blade; 9. Turbine blade; 10. Telescopic mechanism; 1001. Slide plate; 1002. Groove two; 1003. Shaft three; 1004. Rod two; 1005. Shaft four; 1006. Electric push rod; 11. Protective cover. Detailed Implementation

[0029] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0030] Please see Figures 1-6This embodiment discloses a dissolution apparatus for preparing a highly water-resistant AKD emulsion, comprising an apparatus body 1 for preparing and dissolving a highly water-resistant AKD emulsion. A central shaft 2 is rotatably connected to the center of the apparatus body 1. A drive mechanism 3, with one end fixedly connected to the bottom of the central shaft 2, is mounted on the bottom of the apparatus body 1. The drive mechanism 3 includes a first bracket 301 fixedly connected to the bottom of the apparatus body 1, and a motor 302 is installed within the first bracket 301. The bottom end of the central shaft 2 passes through the apparatus body 1, and the output end of the motor 302 is fixedly connected to the bottom end of the central shaft 2. The function of the drive mechanism 3 is to drive an anchor-type paddle 8 to rotate and stir. When it is necessary to prepare and dissolve a highly water-resistant AKD emulsion, the motor 302 is started by program control. This part involves software control and is prior art. The motor 302 starts to drive the conveyor belt... The rotation of the output end drives the central shaft 2 to rotate, which in turn drives the anchor blade 8 to rotate. Simultaneously, through the transmission pulley 702, transmission belt 703, gear disc 5, and gear disc 2 704, the sleeve 4 rotates, which in turn drives the turbine blade 9 to rotate. Because the radius of gear disc 5 is smaller than that of gear disc 2 704, when the large gear drives the small gear to rotate, the small gear rotates faster. Therefore, the sleeve 4 rotates faster than the central shaft 2, causing the large-diameter anchor blade 8 on the central shaft 2 to rotate at a low speed. While stirring the emulsion, it scrapes the inner wall of the main body 1 of the equipment to eliminate dead corners. Meanwhile, the serrated turbine blade 9 on the sleeve 4 rotates at high speed, generating strong shearing force and forming a two-way vortex collision. This minimizes the formation of vortex zones, allowing the AKD wax particles to fully contact the emulsifier, making the water resistance more stable, achieving multi-zone mixing, and improving emulsification efficiency.

[0031] like Figures 6-7As shown, a sleeve 4 is rotatably connected to the outside of the central shaft 2, and a gear disc 5 is fixedly connected to the outside of the sleeve 4. A shaft 6 is rotatably connected to the top of the equipment body 1, and a transmission mechanism 7 that meshes with the gear disc 5 is fixedly connected to the outside of the shaft 6. The transmission mechanism 7 includes a second bracket 701 fixedly connected to the top of the inside of the equipment body 1. The second bracket 701 is rotatably connected to the top of the central shaft 2. A transmission pulley 702 is fixedly connected to the top of the outside of the central shaft 2. The shaft 6 is rotatably connected to the second bracket 701, and a transmission pulley 702 is also fixedly connected to the outside of the shaft 6. A transmission belt 703 is connected between the two transmission pulleys 702. The function of the transmission mechanism 7 is to perform transmission. When the motor 302 starts and drives the central shaft 2 to rotate, it drives the anchor blade 8 to rotate. At the same time, the central shaft 2 rotates, driving the transmission mechanism 7 to rotate. The rotation of pulley 702 drives the rotation of transmission belt 703, which in turn drives the rotation of another transmission pulley 702, which in turn drives shaft 6, gear disc 704, gear disc 5, sleeve 4, and turbine blade 9. Simultaneously, through the cooperation of gear disc 5 and gear disc 704, the anchor blade 8 rotates at low speed and the turbine blade 9 rotates at high speed, generating strong shearing force and forming bidirectional vortex collision, avoiding the formation of vortex zones, meeting the requirements of high-precision adhesive application, improving emulsification efficiency, and not damaging the already formed emulsion structure. At the same time, the linkage formed by shaft 6 reduces energy consumption and lowers production costs. A protective cover 11 is fixedly connected inside the second bracket 701. Gear disc 5 and gear disc 704 are both located inside the protective cover 11. The function of the protective cover 11 is to protect gear disc 5 and gear disc 704.

[0032] like Figures 6-7 As shown, a gear disk 704 that meshes with a gear disk 5 is fixedly connected to the outer bottom end of shaft 2 6. The radius of gear disk 704 is larger than the radius of gear disk 5. Two limiting blocks 705 are rotatably connected to the outside of shaft 2 6 and sleeve 4. Gear disk 5 and gear disk 704 are located between the two limiting blocks 705. The radius of gear disk 704 is larger than the radius of gear disk 5. When gear disk 704 rotates, the rotation speed of gear disk 5 is greater than that of gear disk 704, which makes the rotation speed of sleeve 4 greater than that of central shaft 2, and makes the rotation speed of turbine blade 9 faster than that of anchor blade 8. The function of limiting block 705 is to limit gear disk 5 and gear disk 704.

[0033] like Figures 1-5As shown, a large-diameter anchor blade 8 is fixedly connected to the outer bottom end of the central shaft 2. The two sides of the anchor blade 8 are in contact with the inner wall of the equipment body 1. A serrated turbine blade 9 is fixedly connected to the outer bottom end of the sleeve 4. Telescopic mechanisms 10 are slidably connected to the two sides of the anchor blade 8. The telescopic mechanism 10 includes two sliding plates 1001 that are slidably connected to the top of the two sides of the anchor blade 8. The front ends of both sides of the anchor blade 8 are provided with slots 1002. The front ends of the two sliding plates 1001 are rotatably connected to... The device is equipped with two shafts 1003 that slide within two slots 1002. Each shaft 1003 is rotatably connected to a rod 1004. The other ends of each rod 1004 are rotatably connected to shafts 1005 that slide on either side of the front end of the anchor blade 8. Electric push rods 1006 are mounted on both sides of the anchor blade 8. The output ends of the two electric push rods 1006 are fixedly connected to the two shafts 1005. The telescopic mechanism 10 allows the sides of the anchor blade 8 to extend... When the liquid level in the main body 1 of the equipment drops, the anchor blade 8 will be exposed to the air, resulting in idling. This leads to a sharp reduction in the contact area between the anchor blade 8 and the material, and the air entrainment exacerbates the accumulation of sediment at the bottom of the tank. At this time, the electric push rod 1006 is activated by the program. This part involves software control and is existing technology. The electric push rod 1006 is activated, which drives the output end to move towards the inside of the anchor blade 8, drives the shaft 1005 to move inward, drives the rod 1004 to deflect downward, drives the shaft 1003 to move downward in the tank 1002, and drives the slide plate 1001 to move downward. The slide plate 1001 originally serves as the two sides of the anchor blade 8 in contact with the inner wall of the main body 1. After moving downward, the height of the anchor blade 8 is reduced, preventing the anchor blade 8 from being exposed to the air and affecting the emulsification efficiency. When the liquid level rises, the electric push rod 1006 drives the rod 1004 to deflect upward, driving the slide plate 1001 to move upward. This is convenient, quick, simple and practical.

[0034] In use, this invention achieves efficient emulsification through a differential speed stirring system: the motor 302 drives the central shaft 2 to rotate the large-diameter anchor blade 8 at low speed, and its two sides continuously scrape against the inner wall of the equipment to eliminate dead zones in the stirring; at the same time, the transmission pulley 702, transmission belt 703 and gear disc 5 and gear disc 2 704 mesh to drive the sleeve 4 to rotate at high speed, driving the serrated turbine blade 9 to generate strong shearing force and form a bidirectional vortex collision; since the radius of gear disc 2 704 is larger than that of gear disc 5, the speed of sleeve 4 is higher than that of central shaft 2, causing the anchor blade 8 to rotate at high speed. The low-speed wall scraping and the high-speed shearing of the turbine blades 9 work together to avoid the generation of vortex zones and ensure full contact between AKD particles and emulsifiers. When the liquid level drops, the electric push rod 1006 drives the second rod 1004 to deflect downward, causing the sliding plates 1001 on both sides of the anchor blades 8 to move downward, shortening the effective height of the blades to prevent idling and maintain emulsification efficiency. When the liquid level rises, the reverse adjustment is used to restore the contact area. Through differential stirring and adaptive blade structure, multi-region shearing collision is achieved while eliminating mixing blind zones, significantly improving the stability of the emulsion's water resistance.

[0035] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A dissolution apparatus for preparing a highly water-resistant AKD emulsion, comprising a main body (1) for preparing and dissolving a highly water-resistant AKD emulsion, characterized in that: A central shaft (2) is rotatably connected at the center of the main body (1) of the equipment. A drive mechanism (3) with one end fixedly connected to the bottom of the central shaft (2) is installed at the bottom of the main body (1). A sleeve (4) is rotatably connected to the outside of the central shaft (2). A gear disk (5) is fixedly connected to the outside of the sleeve (4). A shaft (6) is rotatably connected to the top of the main body (1). A transmission mechanism (7) that meshes with the gear disk (5) is fixedly connected to the outside of the shaft (6). A large-diameter anchor blade (8) is fixedly connected to the outer bottom end of the central shaft (2). The two sides of the anchor blade (8) are in contact with the inner wall of the equipment body (1). A serrated turbine blade (9) is fixedly connected to the outer bottom end of the sleeve (4). A telescopic mechanism (10) is slidably connected to the two sides of the anchor blade (8).

2. The dissolution apparatus for preparing a highly water-resistant AKD emulsion according to claim 1, characterized in that: The drive mechanism (3) includes a first bracket (301) fixedly connected to the bottom of the device body (1), a motor (302) is installed in the first bracket (301), the bottom end of the central shaft (2) passes through the device body (1), and the output end of the motor (302) is fixedly connected to the bottom end of the central shaft (2).

3. The dissolution apparatus for preparing a highly water-resistant AKD emulsion according to claim 1, characterized in that: The transmission mechanism (7) includes a second bracket (701) fixedly connected to the top of the inside of the main body (1). The second bracket (701) is rotatably connected to the top of the central shaft (2). A transmission pulley (702) is fixedly connected to the top of the outside of the central shaft (2). The second shaft (6) is rotatably connected to the second bracket (701). A transmission pulley (702) is also fixedly connected to the outside of the second shaft (6). A transmission belt (703) is connected between the two transmission pulleys (702).

4. The dissolution apparatus for preparing a highly water-resistant AKD emulsion according to claim 1, characterized in that: The outer bottom end of the shaft 2 (6) is fixedly connected to a gear disk 2 (704) that meshes with the gear disk 1 (5). The radius of the gear disk 2 (704) is larger than the radius of the gear disk 1 (5). The shaft 2 (6) and the sleeve (4) are both rotatably connected to two limiting blocks (705). The gear disk 1 (5) and the gear disk 2 (704) are located between the two limiting blocks (705).

5. The dissolution apparatus for preparing a highly water-resistant AKD emulsion according to claim 1, characterized in that: The telescopic mechanism (10) includes two sliding plates (1001) that are slidably connected to the top of both sides of the anchor blade (8). The front ends of both sides of the anchor blade (8) are provided with slots (1002). The front ends of the two sliding plates (1001) are rotatably connected to shafts (1003) that slide in the two slots (1002). The outside of the two shafts (1003) is rotatably connected to rods (1004). The other ends of the two rods (1004) are rotatably connected to shafts (1005) that are slidably connected to the front ends of both sides of the anchor blade (8). Electric push rods (1006) are installed on both sides of the anchor blade (8). The output ends of the two electric push rods (1006) are fixedly connected to the two shafts (1005).

6. The dissolution apparatus for preparing a highly water-resistant AKD emulsion according to claim 3, characterized in that: A protective cover (11) is fixedly connected inside the second bracket (701), and the first gear disc (5) and the second gear disc (704) are both located inside the protective cover (11).

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