Reaction kettle for preparing silicon PU plastic material

Abstract

The utility model relates to the technical field of reaction kettles, in particular to a reaction kettle for preparing a silicon polyurethane (PU) plastic material, which comprises a kettle body, a central rotating shaft, a central rotating disc, a side rotating shaft, a central stirring blade, a shearing dispersion disc, a first rotating driving mechanism and a second rotating driving mechanism, the central rotating disc and the central stirring blade are fixedly mounted on the central rotating shaft, the side rotating shaft is rotationally mounted on the central rotating disc, and the shearing and dispersing disc is fixedly mounted on the side rotating shaft. The first rotary driving mechanism drives the central stirring blade to rotate at a low speed in a large range, so that the stirring range is expanded; the side rotating shaft is driven by the second rotating driving mechanism to rotate at a high speed, so that agglomerates are crushed by local high shearing force, and the mixing efficiency and the product uniformity are improved; low-speed stirring and small-range high-shear dispersion significantly reduce fluid resistance, and reduce load and loss of equipment; large-range stirring is combined with revolution of the dispersion disc, the stirring range and efficiency are both considered, and the quality stability of the silicon PU plastic adhesive is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, and in particular to a reaction vessel for preparing silicone PU plastic material. Background Technology

[0002] As a high-viscosity material, silicone PU is not suitable for mixing using ordinary mixing equipment during its production. This is because ordinary mixers typically employ a fixed-center rotation design. The mixer drives the impellers to rotate via mechanical transmission, applying shear and axial forces to the material. When the material viscosity exceeds the design range, the increased torque intensifies the load on mixing-related components. Expanding the mixer's mixing range to achieve more uniform mixing requires overcoming greater fluid resistance, further exacerbating equipment wear; conversely, reducing the mixing range to decrease resistance prevents thorough mixing, significantly reducing mixing efficiency and compromising the quality stability of the silicone PU plastic adhesive. Utility Model Content

[0003] Therefore, it is necessary to provide a reaction vessel for preparing silicone PU plastic materials, which addresses the significant shortcomings of existing stirred reaction vessels in terms of processing efficiency, equipment reliability, and stirring effect.

[0004] To achieve the above objectives, this utility model provides a reaction vessel for preparing silicone PU plastic materials, including a vessel body, a central rotating shaft, a central rotating disk, side rotating shafts, a central stirring blade, a shearing and dispersing disk, a first rotary drive mechanism, and a second rotary drive mechanism. The upper part of the vessel body is provided with a feed inlet, and the lower part of the vessel body is provided with a discharge outlet. The central rotating shaft is rotatably mounted on the vessel body and is coaxially arranged with the vessel body. The central rotating disk and the central stirring blade are both fixedly mounted on the central rotating shaft. The side rotating shafts are rotatably mounted on the central rotating disk, and the shearing and dispersing disk is fixedly mounted on the side rotating shafts. The first rotary drive mechanism drives the central rotating shaft to rotate, and the second rotary drive mechanism drives the two side rotating shafts to rotate.

[0005] The above technical solution utilizes a first rotary drive mechanism to rotate the central shaft, enabling the central stirring blades to perform low-speed, wide-range mixing of the materials within the vessel. Simultaneously, the side shafts revolve around the central shaft on the central disc, while the second rotary drive mechanism drives the side shafts to rotate at high speed, causing the shear dispersion disc to simultaneously revolve and rotate, resulting in high-shear dispersion of the materials and forming a composite stirring flow field. This dual-rotation structure expands the stirring range and improves mixing efficiency, making it particularly suitable for high-viscosity silicone PU materials. The localized high shear force of the shear dispersion disc effectively breaks down agglomerates, improving product uniformity.

[0006] Preferably, the first rotary drive mechanism includes a first mounting frame, a first rotary drive device, and a first coupling. The first mounting frame is fixedly mounted on the vessel body, the first rotary drive device is fixedly mounted on the first mounting frame, and the output end of the first rotary drive device is connected to the central rotating shaft through the first coupling.

[0007] Using the above technical solution, the first rotary drive device transmits power to the central rotating shaft through a coupling, causing the central stirring blades to generate the main stirring force and promote the overall circulation of materials.

[0008] Preferably, the second rotary drive mechanism includes a second mounting frame, a second rotary drive device, a second coupling, a drive shaft, a first transmission assembly, a central rotating sleeve, and a second transmission assembly. The second mounting frame is fixedly mounted on the vessel body, the second rotary drive device is fixedly mounted on the second mounting frame, the drive shaft is rotatably mounted on the vessel body, the output end of the second rotary drive device is connected to the drive shaft through the second coupling, the central rotating sleeve is rotatably mounted inside the vessel body and coaxially arranged with the vessel body, the drive shaft is drivenly connected to the central rotating sleeve through the first transmission assembly, and the central rotating sleeve is drivenly connected to the side rotating shaft through the second transmission assembly.

[0009] Using the above technical solution, the second rotary drive device transmits power to the side rotating shafts through a transmission shaft and transmission components, enabling the shearing and dispersing discs to rotate independently of the central rotating shaft, thus creating a differentiated stirring effect. The central rotating sleeve makes the layout of the side rotating shafts more compact, saving space inside the vessel.

[0010] Preferably, the first transmission assembly includes a driving gear and a driven gear, with the driving gear fixedly mounted on the transmission shaft and the driven gear fixedly mounted on the central rotating sleeve.

[0011] Using the above technical solution, the meshing of the driving gear and the driven gear enables the transmission shaft to transmit power to the central rotating sleeve. Gear transmission has high efficiency and can reliably transmit large torques.

[0012] Preferably, the second transmission assembly includes a driving synchronous pulley, a driven synchronous pulley, and a synchronous belt. The driving synchronous pulley is fixedly mounted on the central rotating sleeve, and the driven synchronous pulley is fixedly mounted on the side rotating shaft. The driving synchronous pulley and the driven synchronous pulley are connected by a synchronous belt drive.

[0013] Using the above technical solution, the cooperation of the driving synchronous pulley, the driven synchronous pulley, and the synchronous belt transmits the power of the central rotating sleeve to the side rotating shaft, enabling the shearing and dispersing disc to rotate on its own axis, while allowing the side rotating shaft to revolve with the central rotating disc. Synchronous belt drive is smooth, absorbs vibration, reduces noise, requires no lubrication, is easy to maintain, and the transmission ratio can be changed by adjusting the pulley diameter.

[0014] Preferably, at least two side rotating shafts are provided, arranged circumferentially along the central rotation axis, with each side rotating shaft corresponding to a different second transmission component. The multiple side rotating shafts are evenly distributed on the central turntable, allowing the shearing and dispersing disc to simultaneously shear the material at different positions, creating a multi-point dispersion effect. This increases the shearing area, improves dispersion efficiency, and reduces dead zones in the mixing process. The circumferentially symmetrical layout balances the forces, reducing equipment vibration and wear.

[0015] Preferably, the central turntable is located above the feed inlet. During feeding, the material will not fall onto the rotating central turntable.

[0016] Preferably, a baffle ring is fixed inside the vessel body and is configured to cooperate with the central turntable. The baffle ring is used to restrict the material from passing through the annular gap formed between the central turntable and the vessel body.

[0017] Preferably, the baffle ring is located below the central turntable. This prevents splashed material from entering above the central turntable and from contacting components of the second rotary drive mechanism, which could affect transmission.

[0018] Preferably, the device also includes a scraper, which is fixedly connected to the central stirring blade and engages with the inner wall of the vessel. The scraper rotates at low speed with the central stirring blade, scraping away adhering material from the inner wall of the vessel in real time, preventing scaling of high-viscosity materials. This reduces material residue, improves product consistency, and lowers cleaning difficulty.

[0019] The benefits of this technical solution are:

[0020] 1. The central rotating shaft is driven to rotate at low speed by the first rotary drive mechanism, and the central stirring blades achieve low-speed, large-area stirring and mixing, thus expanding the stirring range; the central turntable drives the side rotating shaft to revolve, and the second rotary drive mechanism drives the side rotating shaft to rotate at high speed, so that the shearing and dispersing disk revolves around the center and rotates at high speed, thereby breaking up agglomerates with local high shear force and improving mixing efficiency and product uniformity.

[0021] 2. Low-speed stirring and small-scale high-shear dispersion significantly reduce fluid resistance, reducing equipment load and wear; large-scale stirring combined with the revolution of the dispersion disc balances stirring range and efficiency, ensuring the quality stability of silicone PU plastic adhesive. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a reaction vessel for preparing silicone PU plastic material according to one embodiment;

[0023] Figure 2 A front view of a reaction vessel for preparing silicone PU plastic material according to one embodiment;

[0024] Figure 3 for Figure 2 A sectional view along line AA.

[0025] Figure 4 Figure 3 A magnified view of a section at point B in the middle;

[0026] In the diagram, 1. vessel body; 2. feed inlet; 3. discharge outlet; 4. central rotating shaft; 5. central turntable; 6. side rotating shaft; 7. central stirring blade; 8. shearing and dispersing disc; 9. first mounting bracket; 10. first rotary drive device; 11. first coupling; 12. second mounting bracket; 13. second rotary drive device; 14. second coupling; 15. drive shaft; 16. central rotating sleeve; 17. driving gear; 18. driven gear; 19. driving synchronous pulley; 20. driven synchronous pulley; 21. synchronous belt; 22. material retaining ring; 23. scraper. Detailed Implementation

[0027] 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.

[0028] Please see Figures 1 to 4 As shown in the embodiment of this application, a reaction vessel for preparing silicone PU plastic material is provided, including a vessel body 1, a central rotating shaft 4, a central rotating disk 5, side rotating shafts 6, a central stirring blade 7, a shearing and dispersing disk 8, a first rotary drive mechanism, and a second rotary drive mechanism. The upper part of the vessel body 1 is provided with a feed inlet 2, and the lower part of the vessel body 1 is provided with a discharge outlet 3. The central rotating shaft 4 is rotatably mounted on the vessel body 1 through bearings and is coaxially arranged with the vessel body 1. The central rotating disk 5 and the central stirring blade 7 are both fixedly mounted on the central rotating shaft 4. The side rotating shafts 6 are rotatably mounted on the central rotating disk 5 through bearings. The shearing and dispersing disk 8 is fixedly mounted on the side rotating shafts 6. The first rotary drive mechanism drives the central rotating shaft 4 to rotate, and the second rotary drive mechanism drives the two side rotating shafts 6 to rotate.

[0029] The first rotary drive mechanism drives the central shaft 4 to rotate at low speed, causing the central stirring blades 7 to stir and mix the materials in the vessel 1 at low speed and over a wide range, thereby increasing the stirring range. At the same time, the central shaft 4 drives the central turntable 5 to rotate, and the central turntable 5 drives the side shafts 6 to revolve around the central shaft 4. The second rotary drive mechanism drives the side shafts 6 to rotate at high speed, causing the shearing and dispersing disk 8 to revolve at low speed and rotate at high speed, thereby dispersing the materials with high shear. The local high shear force of the shearing and dispersing disk 8 effectively breaks up agglomerates, improves mixing efficiency, and enhances product uniformity.

[0030] Since the central stirring blade 7 rotates at a low speed and the shear dispersion disk 8 disperses the material at a high shear rate over a small area, the fluid resistance encountered during stirring is significantly reduced compared to the fluid resistance encountered during high-speed, large-area stirring of a single central stirring device, which can reduce the load and wear of the equipment. At the same time, the large-area rotation of the central stirring blade 7 and the revolution of the shear dispersion disk 8 can expand the stirring range, ensure stirring efficiency, and ensure the quality stability of the silicone PU plastic.

[0031] In a preferred embodiment, please refer to Figure 1 and Figure 3 As shown, the first rotary drive mechanism includes a first mounting frame 9, a first rotary drive device 10, and a first coupling 11. The first mounting frame 9 is fixedly mounted on the vessel body 1, and the first rotary drive device 10 is fixedly mounted on the first mounting frame 9. The output end of the first rotary drive device 10 is connected to the central rotating shaft 4 through the first coupling 11.

[0032] The first rotary drive device 10 uses a geared motor. The first rotary drive device 10 transmits power to the central rotating shaft 4 through a coupling, so that the central stirring blade 7 generates the main stirring force and promotes the overall large-scale circulation of the material.

[0033] In a preferred embodiment, please refer to Figures 1 to 4 As shown, the second rotary drive mechanism includes a second mounting frame 12, a second rotary drive device 13, a second coupling 14, a drive shaft 15, a first transmission assembly, a central rotating sleeve 16, and a second transmission assembly. The second mounting frame 12 is fixedly mounted on the vessel body 1, and the second rotary drive device 13 is fixedly mounted on the second mounting frame 12. The drive shaft 15 is rotatably mounted on the vessel body 1 via bearings. The output end of the second rotary drive device 13 is connected to the drive shaft 15 via the second coupling 14. The central rotating sleeve 16 is rotatably mounted inside the vessel body 1 via bearings and is coaxially arranged with the vessel body 1. The drive shaft 15 is connected to the central rotating sleeve 16 via the first transmission assembly, and the central rotating sleeve 16 is connected to the side rotating shaft 6 via the second transmission assembly.

[0034] The second rotary drive device 13 uses a variable frequency motor, which allows for easy adjustment of the rotation speed. In actual production, the rotation speed can be adjusted to the appropriate level based on the viscosity of the stirred silicone PU.

[0035] The first transmission assembly includes a driving gear 17 and a driven gear 18. The driving gear 17 is fixedly mounted on the transmission shaft 15, and the driven gear 18 is fixedly mounted on the central rotating sleeve 16. The meshing of the driving gear 17 and the driven gear 18 allows the transmission shaft 15 to transmit power to the central rotating sleeve 16. Gear transmission has high efficiency and can reliably transmit large torques.

[0036] The second transmission assembly includes a driving synchronous pulley 19, a driven synchronous pulley 20, and a synchronous belt 21. The driving synchronous pulley 19 is fixedly mounted on the central rotating sleeve 16, and the driven synchronous pulley 20 is fixedly mounted on the side rotating shaft 6. The driving synchronous pulley 19 and the driven synchronous pulley 20 are connected by the synchronous belt 21. The cooperation of the driving synchronous pulley 19, the driven synchronous pulley 20, and the synchronous belt 21 transmits the power of the central rotating sleeve 16 to the side rotating shaft 6, enabling the shearing and dispersing disk 8 to rotate on its own axis, while allowing the side rotating shaft 6 to revolve with the central rotating disk 5. The synchronous belt 21 provides smooth transmission, absorbs vibration, reduces noise, requires no lubrication, is easy to maintain, and the transmission ratio can be changed by adjusting the pulley diameter.

[0037] In this embodiment, the second rotary drive device 13 drives the transmission shaft 15 to rotate via a coupling. The transmission shaft 15 drives the driven gear 18, the central rotating sleeve 16, and the active synchronous pulley 19 to rotate via the driving gear 17. The active synchronous pulley 19 drives the driven synchronous pulley 20 and the side rotating shaft 6 to rotate via the synchronous belt 21, thereby transmitting power to the side rotating shaft 6, so that the shearing and dispersing disk 8 can achieve independent rotational motion of the central rotating shaft 4, forming a differentiated stirring effect.

[0038] In other embodiments, the first transmission component and the second transmission component can also be interchanged, that is, the first transmission component can also be selected as the second transmission component, and the second transmission component can also be selected as the first transmission component, both of which can realize the rotation transmission when the side rotating shaft 6 revolves.

[0039] In a preferred embodiment, please refer to Figure 1 As shown, two side rotating shafts 6 are configured, arranged circumferentially along the central rotation axis. The second transmission assembly corresponds one-to-one with each side rotating shaft 6. The side rotating shafts 6 are evenly distributed on the central turntable 5, allowing the shearing and dispersing disc 8 to simultaneously shear the material at different positions, creating a multi-point dispersion effect. This increases the shearing area, improves dispersion efficiency, and reduces dead zones in the mixing process. The circumferentially symmetrical layout balances the forces, reducing equipment vibration and wear.

[0040] In a preferred embodiment, please refer to Figure 1 and Figure 3 As shown, the central turntable 5 is located above the feed inlet 2. This prevents the material from falling onto the rotating central turntable 5 during feeding.

[0041] In a preferred embodiment, please refer to Figure 1 and Figure 3 As shown, a baffle ring 22 is fixed inside the vessel body 1 and is configured to cooperate with the central turntable 5. The baffle ring 22 is used to restrict the material from passing through the annular gap formed between the central turntable 5 and the vessel body 1.

[0042] The baffle ring 22 is located below the central turntable 5. This prevents splashed material from entering above the central turntable 5 and from contacting the components of the second rotary drive mechanism, which could affect the transmission.

[0043] In a preferred embodiment, please refer to Figure 1 and Figure 3 As shown, a scraper 23 is also provided, which is fixedly connected to the central stirring blade 7 and contacts the inner wall of the vessel body 1. The scraper 23 rotates at low speed with the central stirring blade 7, scraping away the adhering material on the inner wall of the vessel body 1 in real time, preventing the scaling of high-viscosity materials. This reduces material residue, improves product consistency, and reduces cleaning difficulty.

[0044] 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.

[0045] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but 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.

[0046] 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.

[0047] 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.

[0048] 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.

Claims

1. A reaction vessel for preparing silicone PU plastic material, comprising a vessel body (1), an inlet (2) at the upper part of the vessel body (1), and an outlet (3) at the lower part of the vessel body (1), characterized in that, It also includes a central rotating shaft (4), a central rotating disk (5), a side rotating shaft (6), a central stirring blade (7), a shearing and dispersing disk (8), a first rotary drive mechanism, and a second rotary drive mechanism. The central rotating shaft (4) is rotatably mounted on the vessel body (1) and is coaxially arranged with the vessel body (1). The central rotating disk (5) and the central stirring blade (7) are both fixedly mounted on the central rotating shaft (4). The side rotating shaft (6) is rotatably mounted on the central rotating disk (5). The shearing and dispersing disk (8) is fixedly mounted on the side rotating shaft (6). The first rotary drive mechanism drives the central rotating shaft (4) to rotate, and the second rotary drive mechanism drives the two side rotating shafts (6) to rotate.

2. The reaction vessel for preparing silicone PU plastic material according to claim 1, characterized in that, The first rotary drive mechanism includes a first mounting frame (9), a first rotary drive device (10), and a first coupling (11). The first mounting frame (9) is fixedly mounted on the vessel body (1), and the first rotary drive device (10) is fixedly mounted on the first mounting frame (9). The output end of the first rotary drive device (10) is connected to the central rotating shaft (4) through the first coupling (11).

3. The reaction vessel for preparing silicone PU plastic material according to claim 1, characterized in that, The second rotary drive mechanism includes a second mounting bracket (12), a second rotary drive device (13), a second coupling (14), a drive shaft (15), a first transmission assembly, a central rotating sleeve (16), and a second transmission assembly. The second mounting bracket (12) is fixedly mounted on the vessel body (1), the second rotary drive device (13) is fixedly mounted on the second mounting bracket (12), the drive shaft (15) is rotatably mounted on the vessel body (1), the output end of the second rotary drive device (13) is connected to the drive shaft (15) through the second coupling (14), the central rotating sleeve (16) is rotatably mounted inside the vessel body (1) and is coaxially arranged with the vessel body (1), the drive shaft (15) is connected to the central rotating sleeve (16) through the first transmission assembly, and the central rotating sleeve (16) is connected to the side rotating shaft (6) through the second transmission assembly.

4. The reaction vessel for preparing silicone PU plastic material according to claim 3, characterized in that, The first transmission assembly includes a drive gear (17) and a driven gear (18). The drive gear (17) is fixedly mounted on the transmission shaft (15), and the driven gear (18) is fixedly mounted on the central rotating sleeve (16).

5. The reaction vessel for preparing silicone PU plastic material according to claim 3, characterized in that, The second transmission assembly includes a driving synchronous pulley (19), a driven synchronous pulley (20), and a synchronous belt (21). The driving synchronous pulley (19) is fixedly mounted on the central rotating sleeve (16), and the driven synchronous pulley (20) is fixedly mounted on the side rotating shaft (6). The driving synchronous pulley (19) and the driven synchronous pulley (20) are connected by the synchronous belt (21).

6. The reaction vessel for preparing silicone PU plastic material according to claim 5, characterized in that, At least two side rotating shafts (6) are provided, and the side rotating shafts (6) are distributed in a circle along the central rotation axis. The second transmission component corresponds to the side rotating shafts (6) one by one.

7. The reaction vessel for preparing silicone PU plastic material according to claim 1, characterized in that, The central turntable (5) is located above the feed inlet (2).

8. The reaction vessel for preparing silicone PU plastic material according to claim 1, characterized in that, The vessel body (1) is fixed with a baffle ring (22) that cooperates with the central turntable (5). The baffle ring (22) is used to restrict the material from passing through the annular gap formed between the central turntable (5) and the vessel body (1).

9. The reaction vessel for preparing silicone PU plastic material according to claim 8, characterized in that, The baffle ring (22) is located below the central turntable (5).

10. The reaction vessel for preparing silicone PU plastic material according to claim 1, characterized in that, It also includes a scraper (23), which is fixedly connected to the central stirring blade (7) and the scraper (23) is in contact with the inner wall of the vessel body (1).

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