Active cooling cage type dispersion head for high-speed dispersion machine

Abstract

The invention provides an active cooling cage type dispersion head for a high-speed dispersion machine, and effectively solves the problems of local overheating, slow cooling response and to-be-further-improved dispersion shearing effect during high-speed dispersion in the prior art. According to the technical scheme, the device comprises a fixed shell; a water inlet and a water outlet are formed in the upper end face of the fixed shell, an outer barrel is arranged on the lower side of the fixed shell, a middle partition plate of the cylindrical shell divides a cavity of the cylindrical shell into an upper cavity and a lower cavity which are isolated from each other, and an inner barrel is arranged in the outer barrel. A plurality of dispersing modules are arranged around the cylindrical shell; the dispersing module comprises two long-strip-shaped shells, a plurality of rotating wheels are arranged between the two long-strip-shaped shells, and each rotating wheel comprises two coaxial connecting cylinders; according to the active cooling type cage-shaped dispersing head provided by the invention, an area where heat is most concentrated in a high-speed dispersing process can be timely cooled, so that the production efficiency is remarkably improved, and the production efficiency and the product quality are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of environmentally friendly paint and coating production equipment technology, and in particular to an active cooling cage-type dispersing head for a high-speed disperser. Background Technology

[0002] In the chemical production of paints, coatings, and other products, high-speed dispersers are key equipment for achieving the mixing and dispersion of liquid and solid phase materials. Their working principle relies on a high-speed rotating dispersion disc applying strong shear force to the material. However, this process converts a large amount of mechanical energy into heat energy, causing a rapid increase in the material temperature.

[0003] The problems caused by this temperature rise are extremely challenging. This is especially true in the production of high-end products such as automotive paints and electronic adhesives, where materials are highly sensitive to temperature. High temperatures can lead to minor issues like excessive solvent evaporation, imbalanced formulations, and abnormal product viscosity; more serious problems can cause thermosetting resins (such as epoxy and polyurethane) to react prematurely, resulting in gelation and even the scrapping of the entire batch. Furthermore, some critical chemical additives may also fail at high temperatures, directly impacting the final performance of the product.

[0004] Currently, there are two main heat dissipation solutions in the industry, each with its own shortcomings. One is the cooling device for a coating or paint dispersion tank, as disclosed in patent CN203591765U, which uses a jacket or coil to cool the mixing tank. This method is "indirect cooling," where heat must pass through the raw material before reaching the container sidewall, resulting in high thermal resistance and slow response. It cannot effectively cool down the locally generated high temperatures at the tip of the dispersion disc, leading to very low cooling efficiency. The other solution, such as a coating mixer disclosed in patent CN218553997U, attempts to achieve "direct cooling" by setting cooling channels inside the mixing components. While this shortens the heat dissipation path, the mixing structure itself is usually simple and fixed. The trajectory of the mixing structure during rotation is a simple circle, which cannot effectively agitate and refresh the material, resulting in a limited cooling area and a rapid reach of the maximum heat dissipation efficiency. Furthermore, this simple structure also limits its shear efficiency, sometimes even affecting the final dispersion effect, resulting in a trade-off. In summary, existing cooling technologies, whether indirect jacketed cooling or simple built-in cooling structures, all suffer from drawbacks such as slow response, low efficiency, or impaired dispersion, and cannot achieve both efficient heat dissipation and excellent dispersion.

[0005] Therefore, we urgently need an active cooling cage-type dispersing head for high-speed dispersers, which can achieve high-intensity shear dispersion while providing timely and precise heat dissipation and cooling to the core heat-generating area, thereby effectively improving production efficiency and process safety while ensuring paint quality. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, the present invention provides an active cooling cage-type dispersing head for high-speed dispersers, which effectively solves the problems of local overheating, slow cooling response, and the need to further improve the dispersing and shearing effect during high-speed dispersion in the prior art.

[0007] The technical solution includes a fixed shell, which is fixed to the lifting arm of the disperser; the upper end face of the fixed shell is provided with an inlet and an outlet, and the lower side of the fixed shell has a vertical outer cylinder that can rotate actively. The upper end of the outer cylinder is rotatably installed with the fixed shell, and the lower end of the outer cylinder is fixed with a cylindrical shell. A partition is provided in the middle of the cylindrical shell so that the cavity of the cylindrical shell is divided into an upper cavity and a lower cavity that are isolated from each other. There is an inner cylinder coaxial with it in the outer cylinder. The lower end of the inner cylinder is fixed with a partition and communicates with the lower cavity. The upper end of the inner cylinder extends out of the outer cylinder and communicates with the outlet; there are multiple dispersing modules evenly distributed in a circle around the cylindrical shell. The dispersion module includes two elongated shells arranged along the diameter of a cylinder. One elongated shell is connected to the upper cavity, and the other elongated shell is connected to the lower cavity. There are multiple rotating wheels between the two elongated shells. Each rotating wheel includes two coaxial connecting cylinders connected by multiple circumferentially distributed hollow tubes. The hollow tubes are spiral-shaped, and the connecting cylinders are rotatably mounted on the side wall of the elongated shell. When the outer cylinder rotates, it drives the multiple rotating wheels in the dispersion module to revolve. The multiple spiral hollow tubes in the rotating wheels are resisted by the material during the revolution, thus enabling the rotating wheels to rotate on their own axis.

[0008] Furthermore, the coolant enters through the inlet on the fixed shell, flows downward through the annular gap between the inner and outer cylinders to the upper cavity inside the cylindrical shell, then from the upper cavity to one of the elongated shells, and then through the connecting cylinder and multiple hollow tubes to another elongated shell, and finally to the lower cavity. Finally, the coolant flows upward from the lower cavity out through the outlet on the fixed shell.

[0009] Furthermore, a large gear is fixed to the upper end of the outer cylinder, and a small gear that can rotate is inside the fixed shell. A motor is connected to the small gear, and the motor is fixed to the fixed shell.

[0010] Furthermore, the distributed module includes multiple rotating wheels connected end to end, with adjacent rotating wheels connected by elbows, and the elbows fixed to the cylindrical shell by fixing rods.

[0011] Furthermore, the distributed module contains multiple sets of rotating wheels, and the multiple rotating wheels in each set are connected end to end to form an arc structure. Multiple sets of rotating wheels form multiple concentric arc structures. Adjacent rotating wheels are connected by bends, and the bends are fixed to the cylindrical shell by fixing rods.

[0012] Furthermore, the dispersion module includes two sets of rotating wheels that form a concentric arc structure, wherein the diameter of the inner wheel is larger than the diameter of the outer wheel.

[0013] Furthermore, the hollow tube has a serrated structure on its outer edge.

[0014] Furthermore, the partition adopts a multi-layer structure, with a heat insulation pad placed in the middle of the multi-layer structure.

[0015] Furthermore, the inner cylinder is made of heat-insulating material.

[0016] Furthermore, the helical directions of the hollow tubes in the two adjacent rotors are opposite.

[0017] The active cooling cage-type dispersing head provided by this invention can dissipate heat and cool the area where the heat is most concentrated during high-speed dispersion in a timely manner. This fundamentally suppresses quality problems such as resin gelation, pigment coarsening, and additive failure caused by local overheating, significantly improving production efficiency. The efficient heat dissipation capability enables the equipment to operate stably at higher speeds, resulting in a significant improvement in both production efficiency and product quality. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention.

[0019] Figure 2 This is the front view of the present invention.

[0020] Figure 3 This is a structural diagram of the outer cylinder, inner cylinder, partition, and large gear in this invention.

[0021] Figure 4 This is an exploded view of the present invention.

[0022] Figure 5 This is a bottom view of the present invention.

[0023] Figure 6 This is a structural diagram of some parts in this invention.

[0024] Figure 7 This is a structural diagram of the distributed module in this invention.

[0025] Figure 8 This is a structural diagram of wheel a in this invention.

[0026] Figure 9 This is a structural diagram of wheel b in this invention. Detailed Implementation

[0027] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Depend on Figures 1 to 9The present invention includes a fixed shell 1, which is fixed to the lifting arm of a disperser; the upper end face of the fixed shell 1 is provided with an inlet 2 and an outlet 3; the lower side of the fixed shell 1 has a vertical and rotatable outer cylinder 4, the upper end of the outer cylinder 4 is rotatably mounted with the fixed shell 1; the lower end of the outer cylinder 4 is fixed with a cylindrical shell 5; a partition 6 is provided in the middle of the cylindrical shell 5 so that the cavity of the cylindrical shell 5 is divided into an upper cavity 501 and a lower cavity 502 that are isolated from each other; the outer cylinder 4 has an inner cylinder 7 coaxial with it; the lower end of the inner cylinder 7 is fixed with the partition 6 and communicates with the lower cavity 502; the upper end of the inner cylinder 7 extends out of the outer cylinder 4 and communicates with the outlet 3; multiple dispersion modules are evenly distributed in a circle around the cylindrical shell 5; The dispersion module includes two elongated shells 8 arranged along the diameter of a cylinder. One elongated shell 8 is connected to the upper cavity 501, and the other elongated shell 8 is connected to the lower cavity 502. There are multiple rotating wheels 9 between the two elongated shells 8. Each rotating wheel 9 includes two coaxial connecting cylinders 901, which are connected by multiple circumferentially distributed hollow tubes 902. The hollow tubes 902 are spiral in shape, and the connecting cylinders 901 are rotatably mounted on the side wall of the elongated shell 8. When the outer cylinder 4 rotates, the outer cylinder 4 drives the multiple rotating wheels 9 in the dispersion module to revolve. The multiple spiral hollow tubes 902 in the rotating wheel 9 are resisted by the material during the revolution, thus realizing the rotation of the rotating wheel 9.

[0029] The coolant enters through the inlet 2 on the fixed shell 1, passes through the annular gap between the inner cylinder 7 and the outer cylinder 4, and reaches the upper cavity 501 inside the cylindrical shell 5. Then, it passes through the upper cavity 501 to one of the elongated shells 8, and then through the connecting cylinder 901 and multiple hollow tubes 902 to reach another elongated shell 8, and then to the lower cavity 502. Finally, the coolant flows out from the lower cavity 502 upwards through the outlet 3 on the fixed shell 1.

[0030] In order to achieve the active rotation of the outer cylinder 4, a large gear 10 is fixed at the upper end of the outer cylinder 4, and a small gear 11 that can rotate is inside the fixed shell 1. A motor 12 is connected to the small gear 11, and the motor 12 is fixed on the fixed shell 1.

[0031] To improve the dispersion and mixing efficiency, the dispersion module includes multiple rotating wheels 9 connected end to end. Adjacent rotating wheels 9 are connected by elbows 13, and elbows 13 are fixed to the cylindrical shell 5 by fixing rods 14.

[0032] To further improve the dispersion effect, the dispersion module includes multiple sets of rotating wheels 9. The multiple rotating wheels 9 in each set are connected end to end to form an arc structure. Multiple sets of rotating wheels 9 form multiple concentric arc structures. Adjacent rotating wheels 9 are connected by elbows 13. The elbows 13 are fixed to the cylindrical shell 5 by fixing rods 14.

[0033] To ensure that the hollow tubes 902 on different rotating wheels 9 have equal or similar rotational speeds and to ensure that the heat generated on the hollow tubes 902 can be carried away in time, the dispersion module includes two sets of rotating wheels 9, which form a concentric arc structure, wherein the diameter of the inner rotating wheel 9 is larger than the diameter of the outer rotating wheel 9.

[0034] To improve shearing efficiency and enhance dispersion, the hollow tube 902 has a serrated structure on its outer edge.

[0035] In order to reduce the heat exchange between the upper cavity 501 and the lower cavity 502 of the coolant in the cylindrical shell 5, the partition 6 adopts a multi-layer structure, and a heat insulation pad is provided in the middle of the multi-layer structure.

[0036] To prevent heat exchange between the inner cylinder 7 and the outer cylinder 4, the inner cylinder 7 is made of heat-insulating material.

[0037] To enhance the shearing effect, the hollow tubes 902 in the two adjacent rotating wheels 9 have opposite spiral directions.

[0038] It is worth noting that a bearing is installed between the upper end of the inner cylinder 7 and the outlet 3 in this invention, a bearing is installed between the upper end of the outer cylinder 4 and the lower side wall of the fixed shell 1, and a bearing is installed between the connecting cylinder 901 and the long shell 8 and the elbow 13. It is preferable that all bearings are special sealed bearings that are waterproof, oil-proof and dustproof. Of course, considering the special physical properties of paint, if cost is not a concern, all rotating pairs in this invention can be in the form of mechanical seals.

[0039] For ease of explanation, such as Figure 1 , 4 As shown in Figures 5 and 7, each distributed module contains two sets of rotating wheels 9. The rotating wheel 9 closer to the cylindrical shell 5 is designated as rotating wheel a, and the rotating wheel 9 farther from the cylindrical shell 5 is designated as rotating wheel b. The diameter of rotating wheel a is larger than that of rotating wheel b. The coolant enters the fixed shell 1 through the inlet 2 and is discharged through the outlet 3.

[0040] When using, such as Figure 2As shown, motor 12 drives pinion 11 to rotate, pinion 11 drives outer cylinder 4 to rotate via large gear 10, outer cylinder 4 drives multiple sets of dispersing modules to revolve via cylindrical shell 5. In the revolving process, multiple rotating wheels 9 in the dispersing modules are subjected to resistance, causing the rotating wheels 9 to rotate on their own axis. During the rotation, the serrated structure on the outer edge of the hollow tube 902 achieves shearing and stirring of the material, thus achieving the dispersing effect. Meanwhile, since the linear velocity of the hollow tube 902 is the sum of the rotational speed of the wheel 9 as it revolves around the cylindrical shell 5 and the rotational speed of the wheel 9 itself, the serrated structure on the hollow tube 902 generates a lot of heat. At this time, the coolant enters the fixed shell 1 through the inlet 2, and then enters the upper cavity 501 of the cylindrical shell 5 through the annular gap between the inner cylinder 7 and the outer cylinder 4. It then enters multiple dispersion modules. For a single dispersion module, the coolant first enters one of the elongated shells 8, and then passes through multiple wheels 9 in multiple groups in sequence, and then reaches another elongated shell 8. Subsequently, it enters the lower cavity 502 of the cylindrical shell 5, and finally moves upward through the inner cylinder 7 and is discharged from the outlet 3.

[0041] In the above, since the diameters of the inner and outer rings a-roller 9 and b-roller 9 are different, and the diameter of the inner a-roller 9 is larger than that of the outer b-roller 9, the diameters of the two can be adjusted by using known conditions so that the linear velocity of each hollow tube 902 is consistent or close under the same revolution speed. In other words, this design can make the heat generated by a single hollow tube 902 in a unit time the same or close, further ensuring that the temperature distribution is uniform throughout the material.

[0042] This invention directly constructs the cooling channel within the high-speed rotating stirring disc and impeller 9, achieving precise cooling. The coolant directly reaches the shear zone with the greatest heat generation, instantly carrying away the heat generated by mechanical friction and shear. Theoretically, its efficiency is far higher than that of indirect cooling methods from the external container wall.

[0043] The impeller 9 of this invention rotates on its own axis while revolving around the sun, forming a complex flow field. The trajectory of the hollow tube 902 is three-dimensional, which can greatly reduce the dead angle of stirring and make the materials (such as pigments and fillers in paint) more evenly and finely dispersed, which helps to improve the gloss, color consistency and stability of the final product.

[0044] Traditional equipment is most vulnerable to sudden high temperatures in localized areas such as the impeller tip during high-speed mixing. This can lead to localized resin gelation or additive failure. To address this issue, this invention eliminates these potential problems at the source, which is crucial for producing high-quality products.

[0045] This invention integrates an active cooling channel into a cage-shaped rotor 9 that undergoes planetary motion, allowing the cooling effect to act directly on the source of shear heat generation, achieving a precise and timely cooling effect. It not only removes heat instantly, but also forms a three-dimensional shear field through the revolution and rotation of the rotor 9, thereby completely suppressing local overheating while ensuring the uniformity and fineness of the dispersion.

[0046] In this invention, the spiral directions of the hollow tubes 902 in two adjacent rotating wheels 9 are opposite, which means that the rotation directions of adjacent rotating wheels 9 are also opposite. This can maximize the collision and shearing of material particles and improve the dispersion and mixing efficiency.

[0047] It is particularly noteworthy that, when the cage-type rotor 9 of the present invention rotates, each rotor 9 becomes an independent micro-mixing center. The powerful "micro-pump effect" generated by it can continuously entrain and transport the material at the bottom and the surrounding area of ​​the tank to the high shear zone, thereby completely solving the pigment sedimentation and stratification problems common in traditional dispersers. It greatly enhances the interfacial fusion between components of different densities and viscosities, ensuring the uniformity of the material from the top to the bottom of the tank, and achieving a synergistic effect between the macro and micro levels.

[0048] The active cooling cage-type dispersing head provided by this invention can dissipate heat and cool the area where the heat is most concentrated during high-speed dispersion in a timely manner. This fundamentally suppresses quality problems such as resin gelation, pigment coarsening, and additive failure caused by local overheating, significantly improving production efficiency. The efficient heat dissipation capability enables the equipment to operate stably at higher speeds, resulting in a significant improvement in both production efficiency and product quality.

Claims

1. A cage-type dispersing head with active cooling for a high-speed disperser, characterized in that, The system includes a fixed shell (1) which is fixed to the lifting arm of the disperser; the upper end of the fixed shell (1) is provided with an inlet (2) and an outlet (3); the lower side of the fixed shell (1) has a vertical outer cylinder (4) that can rotate actively; the upper end of the outer cylinder (4) is rotatably installed with the fixed shell (1); the lower end of the outer cylinder (4) is fixed with a cylindrical shell (5); a partition (6) is provided in the middle of the cylindrical shell (5) so that the cavity of the cylindrical shell (5) is divided into an upper cavity (501) and a lower cavity (502) that are isolated from each other; the outer cylinder (4) has an inner cylinder (7) that is coaxial with it; the lower end of the inner cylinder (7) is fixed with a partition (6) and communicates with the lower cavity (502); the upper end of the inner cylinder (7) extends out of the outer cylinder (4) and communicates with the outlet (3); the cylindrical shell (5) has multiple dispersion modules evenly distributed in a circle around it; The dispersion module includes two elongated shells (8), which are arranged along the diameter of the cylinder. One elongated shell (8) is connected to the upper cavity (501), and the other elongated shell (8) is connected to the lower cavity (502). There are multiple rotating wheels (9) between the two elongated shells (8). Each rotating wheel (9) includes two coaxial connecting cylinders (901). The two connecting cylinders (901) are connected by multiple circumferentially distributed hollow tubes (902). The hollow tubes (902) are spiral in shape. The connecting cylinders (901) are rotatably mounted on the side wall of the elongated shell (8). When the outer cylinder (4) rotates, the outer cylinder (4) drives the multiple rotating wheels (9) in the dispersion module to revolve. The multiple spiral hollow tubes (902) in the rotating wheel (9) are resisted by the material during the revolution, so that the rotating wheel (9) rotates on its own.

2. The actively cooled cage-type dispersing head for a high-speed disperser according to claim 1, characterized in that, The coolant enters through the inlet (2) on the fixed shell (1), passes through the annular gap between the inner cylinder (7) and the outer cylinder (4) and reaches the upper cavity (501) inside the cylindrical shell (5). Then, it passes through the upper cavity (501) to one of the long shells (8), and then through the connecting cylinder (901) and multiple hollow tubes (902) to reach another long shell (8), and then to the lower cavity (502). Finally, the coolant flows out from the lower cavity (502) upward through the outlet (3) on the fixed shell (1).

3. The actively cooled cage-type dispersing head for a high-speed disperser according to claim 1, characterized in that, The outer cylinder (4) is fixed with a large gear (10) at the upper end, and there is a small gear (11) that can rotate inside the fixed shell (1). A motor (12) is connected to the small gear (11), and the motor (12) is fixed on the fixed shell (1).

4. The actively cooled cage-type dispersing head for a high-speed disperser according to claim 1, characterized in that, The distributed module contains multiple rotating wheels (9), which are connected end to end. Two adjacent rotating wheels (9) are connected by a bend (13), and the bend (13) is fixed to the cylindrical shell (5) by a fixing rod (14).

5. The actively cooled cage-type dispersing head for a high-speed disperser according to claim 1, characterized in that, The distributed module contains multiple sets of rotating wheels (9). The multiple rotating wheels (9) in each set of rotating wheels (9) are connected end to end to form an arc structure. Multiple sets of rotating wheels (9) form multiple concentric arc structures. Two adjacent rotating wheels (9) are connected by a bend (13). The bend (13) is fixed to the cylindrical shell (5) by a fixing rod (14).

6. The actively cooled cage-type dispersing head for a high-speed disperser according to claim 5, characterized in that, The distributed module contains two sets of rotating wheels (9), which form a concentric arc structure. The diameter of the inner wheel (9) is larger than that of the outer wheel (9).

7. The actively cooled cage-type dispersing head for a high-speed disperser according to claim 6, characterized in that, The hollow tube (902) has a serrated structure on its outer edge.

8. The actively cooled cage-type dispersing head for a high-speed disperser according to claim 1, characterized in that, The partition (6) adopts a multi-layer structure, and a heat insulation pad is set in the middle of the multi-layer structure.

9. The actively cooled cage-type dispersing head for a high-speed disperser according to claim 1, characterized in that, The inner cylinder (7) is made of heat-insulating material.

10. A cage-type dispersing head for a high-speed disperser according to any one of claims 5 to 7, characterized in that, The spiral directions of the hollow tubes (902) in the two adjacent rotating wheels (9) are opposite.

Images