Perfluoropolyether mixing, stirring and homogenizing device

Abstract

The utility model discloses a perfluoropolyether mixing, stirring and homogenizing device which comprises a totally-enclosed stirring cabin, the totally-enclosed stirring cabin comprises a stirring tank and a sealing cover, a stirring shaft is rotatably connected to the center of the stirring tank through a sealing bearing, stirring blades are fixedly connected to the outer side of the stirring shaft, and a driving shaft is rotatably connected to the center of the sealing cover through a sealing bearing; the sealing cover is mounted at the top of the stirring tank to form a totally-enclosed stirring cabin, then the driving shaft is butted with the stirring shaft, the upper fixing box is communicated with the lower fixing box through the flow guide channel, and then the stirring shaft is butted with an external water-cooling circulating system through the first external interface and the second external interface; cooling water passes through the driving shaft, the stirring shaft and the stirring blades along the flow guide channel, the stirring blades are cooled in a heat exchange mode, and the situation that heat is generated by friction between perfluoropolyether oily liquid and the stirring blades in the stirring and homogenizing process, and consequently heat accumulation in perfluoropolyether affects performance change is avoided.

Description

Technical Field

[0001] This utility model relates to the field of stirring technology, specifically to a perfluoropolyether mixing and homogenization device. Background Technology

[0002] Perfluoropolyether is a synthetic polymer that is liquid at room temperature. Its molecular structure contains only three elements: C, F, and O. By replacing the C-H bonds in hydrocarbon molecules with stronger C-F bonds, while retaining C-O and C-C covalent bonds, it possesses unique chemical and physical properties. The viscosity index of perfluoropolyether oil is 150-400. The larger the molecular weight of the oil, the higher its viscosity index.

[0003] During stirring, friction between high-viscosity materials and the stirrer, container walls, etc., generates heat, which may lead to excessively high local temperatures. Perfluoropolyethers may degrade or change in performance at high temperatures, affecting product quality. Air bubbles are easily introduced during stirring, and these bubbles are difficult to expel quickly, affecting the uniformity of the material and subsequent processing performance. In certain applications sensitive to bubbles, such as high-precision coating preparation, the bubble problem is even more prominent. Utility Model Content

[0004] The purpose of this invention is to provide a perfluoropolyether mixing and homogenization device. Through a first and second external interface connected to a water-cooling circulation system, cooling water flows along a guide channel through the drive shaft, stirring shaft, and stirring blades to achieve heat exchange and cool the stirrer structure. Subsequently, during the stirring and friction process between the stirrer and high-viscosity materials, the temperature of the contact surface between the material and the stirrer is reduced, preventing heat accumulation inside the viscous material and affecting its stability and performance changes, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a perfluoropolyether mixing and homogenization device, comprising:

[0006] Fully enclosed mixing chamber;

[0007] The fully enclosed mixing chamber includes a mixing tank and a sealing cover. A mixing shaft is rotatably connected to the center of the mixing tank via a sealing bearing. Mixing blades are fixedly connected to the outer side of the mixing shaft. A drive shaft is rotatably connected to the center of the sealing cover via a sealing bearing. The ends of the mixing shaft and the drive shaft, facing each other, penetrate into the interior of the fully enclosed mixing chamber and are connected. An upper fixed box and a lower fixed box are fixed to the bottom of the sealing cover and the mixing tank, respectively. A first external interface and a second external interface are respectively connected to the side walls of the upper fixed box and the lower fixed box. The drive shaft is rotatably connected to the upper fixed box via a sealing bearing. One end of the mixing shaft penetrates into the inner cavity of the lower fixed box.

[0008] The drive shaft, stirring shaft, and stirring blades are provided with interconnected flow channels, and the two ends of the flow channels are connected to the upper fixed box and the lower fixed box, respectively.

[0009] Preferably, the upper end of the stirring shaft is fixed with a connector, the lower end of the drive shaft is provided with a connector, the connector is inserted into the connector, the lower end of the drive shaft is fixed with a polygonal snap ring outside the connector, and the upper end of the stirring shaft is provided with a snap groove that cooperates with the snap ring.

[0010] Preferably, a mounting bracket is fixed to the top of the sealing cover, and a stirring motor is fixed to the top of the mounting bracket. The output shaft of the stirring motor is fixedly connected to the drive shaft via a coupling.

[0011] Preferably, the top of the sealing cover is connected to an external pipe, and a manual gate valve is installed on the external pipe.

[0012] Preferably, the outer side of the connector has a groove, and a sealing ring is fitted inside the groove. The outer side of the sealing ring extends to the outer side of the groove and is pressed and fitted against the inner wall of the connector.

[0013] Preferably, one side of the sealing cap is hinged to one side of the top of the mixing tank, and the mixing tank and the other side of the sealing cap are locked together by a snap fastener.

[0014] Preferably, positioning posts are fixed around the top of the mixing tank, and positioning holes that cooperate with the positioning posts are provided at the bottom of the sealing cover.

[0015] Preferably, the upper end face of the mixing tank is provided with a sealing rubber gasket, which is sleeved on the outside of the positioning column.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model forms a fully enclosed mixing chamber by installing a sealing cover on the top of the mixing tank. Then, the drive shaft and the mixing shaft are connected, and the upper fixed box and the lower fixed box are connected through the flow channel. Then, it is connected to the external water cooling circulation system through the first external interface and the second external interface. The cooling water passes through the drive shaft, the mixing shaft and the mixing blades along the flow channel and cools the mixing blades through heat exchange. This avoids the perfluoropolyether oily liquid from generating heat through friction with the mixing blades during the mixing and homogenization process, which would cause heat accumulation inside the perfluoropolyether and affect its performance.

[0018] 2. This utility model connects to a vacuum degassing machine via an external pipe to evacuate the fully enclosed mixing chamber. The vacuum environment reduces the solubility of gases, causing bubbles to overflow and eliminating bubbles that are easily formed inside viscous materials during the mixing process. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a cross-sectional three-dimensional structural diagram of the fully enclosed mixing chamber of this utility model;

[0021] Figure 3 This is a cross-sectional perspective view of the drive shaft and stirring shaft of this utility model.

[0022] Figure 4 This is a three-dimensional structural diagram of the drive shaft and stirring shaft of this utility model;

[0023] Figure 5 This is a schematic diagram of the open three-dimensional structure of the fully enclosed mixing chamber of this utility model.

[0024] The following are the labels in the diagram: 1. Mixing tank; 2. Sealing cover; 3. Mixing shaft; 4. Mixing blades; 5. Drive shaft; 6. Upper fixing box; 7. Lower fixing box; 8. First external interface; 9. Second external interface; 10. Guide channel; 11. Plug connector; 12. Plug interface; 13. Snap ring; 14. Snap groove; 15. Mounting bracket; 16. Mixing motor; 17. External pipe; 18. Groove; 19. Sealing ring; 20. Positioning post; 21. Positioning hole; 22. Sealing rubber gasket. Detailed Implementation

[0025] 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.

[0026] This utility model provides, for example Figures 1-5 The perfluoropolyether mixing and homogenization device shown includes:

[0027] Fully enclosed mixing chamber;

[0028] The fully enclosed mixing chamber includes a mixing tank 1 and a sealing cover 2. A mixing shaft 3 is rotatably connected to the center of the mixing tank 1 via a sealing bearing. A mixing blade 4 is fixedly connected to the outside of the mixing shaft 3. A drive shaft 5 is rotatably connected to the center of the sealing cover 2 via a sealing bearing. The opposite ends of the mixing shaft 3 and the drive shaft 5 both penetrate into the interior of the fully enclosed mixing chamber and are connected. An upper fixed box 6 and a lower fixed box 7 are fixed to the bottom of the sealing cover 2 and the mixing tank 1, respectively. A first external interface 8 and a second external interface 9 are respectively connected to the side walls of the upper fixed box 6 and the lower fixed box 7. The drive shaft 5 is rotatably connected to the upper fixed box 6 via a sealing bearing. One end of the mixing shaft 3 penetrates into the inner cavity of the lower fixed box 7.

[0029] The drive shaft 5, the stirring shaft 3 and the stirring blade 4 are provided with a connecting guide channel 10, and the two ends of the guide channel 10 are connected to the upper fixed box 6 and the lower fixed box 7 respectively.

[0030] A fully enclosed mixing chamber is formed by installing the sealing cover 2 on the top of the mixing tank 1. Then, the drive shaft 5 and the mixing shaft 3 are connected. The upper fixed box 6 and the lower fixed box 7 are connected through the guide channel 10. Then, the system is connected to the external water cooling circulation system through the first external interface 8 and the second external interface 9. The cooling water passes through the drive shaft 5, the mixing shaft 3 and the mixing blades 4 along the guide channel 10. The mixing blades 4 are cooled by heat exchange, which avoids the perfluoropolyether oily liquid from generating heat by friction with the mixing blades 4 during the mixing and homogenization process, which would cause heat accumulation inside the perfluoropolyether and affect its performance.

[0031] Among them, such as Figure 1 and Figure 5 As shown:

[0032] A connector 11 is fixed at the upper end of the stirring shaft 3, and a connector interface 12 is provided at the lower end of the drive shaft 5. The connector 11 is inserted into the connector interface 12. A polygonal snap ring 13 is fixed at the lower end of the drive shaft 5 outside the connector interface 12. A snap groove 14 that works with the snap ring 13 is provided at the upper end of the stirring shaft 3. The connection between the connector 11 and the connector interface 12 facilitates the connection of the flow channel 10. The connection between the snap ring 13 and the snap groove 14 enables the drive shaft 5 to synchronously drive the stirring shaft 3 to rotate, which facilitates the stirring of materials.

[0033] Furthermore, such as Figure 1-3 and Figure 5 As shown:

[0034] A mounting bracket 15 is fixed to the top of the sealing cover 2, and a stirring motor 16 is fixed to the top of the mounting bracket 15. The output shaft of the stirring motor 16 is fixedly connected to the drive shaft 5 through a coupling. The stirring motor 16 is installed through the mounting bracket 15, and then the stirring motor 16 is connected to the drive shaft 5 through the coupling to provide driving force to the drive shaft 5, thereby realizing the stirring of materials.

[0035] Preferred, such as Figure 1-2 As shown:

[0036] The top of the sealing cap 2 is connected to an external pipe 17, which is equipped with a manual gate valve. The external pipe 17 connects to a vacuum degassing machine to evacuate the fully enclosed mixing chamber. A vacuum level of -0.1 to -0.08 MPa is recommended, and this should be maintained for 10-30 minutes. The vacuum degassing machine (such as the TRILOS online degassing system) combines thin-film or impact degassing technology to efficiently remove tiny bubbles from the interior of high-viscosity fluids. The vacuum environment reduces gas solubility, causing bubbles to escape and eliminating bubbles that easily form inside viscous materials during mixing. The manual gate valve can be used to close the external pipe 17, ensuring the sealing of the fully enclosed mixing chamber and preventing some materials from evaporating during mixing.

[0037] It is worth noting that, such as Figure 3-4 As shown:

[0038] A groove 18 is provided on the outer side of the connector 11, and a sealing ring 19 is fitted inside the groove 18. The outer side of the sealing ring 19 extends to the outer side of the groove 18 and is pressed and fitted against the inner wall of the connector 12. The sealing ring 19 is placed through the groove 18, and the sealing ring 19 is used to achieve a sealed connection between the connector 11 and the connector 12, so as to avoid gaps at the connection between the drive shaft 5 and the stirring shaft 3, which would cause the cooling water in the guide channel 10 to leak outward, and at the same time, it would be impossible to achieve a fully enclosed mixing chamber and the outside world.

[0039] In a further preferred embodiment, such as Figure 1 and Figure 5 As shown:

[0040] One side of the sealing cover 2 is hinged to one side of the top of the mixing tank 1. The other side of the mixing tank 1 and the sealing cover 2 are locked together by a buckle. The buckle is used to lock the sealing cover 2 and the mixing tank 1 together, and it is also convenient to flip the sealing cover 2 to load and unload materials and clean the tank walls.

[0041] In addition, such as Figure 5 As shown:

[0042] Positioning posts 20 are fixed around the top of the mixing tank 1. The bottom of the sealing cover 2 is provided with positioning holes 21 that cooperate with the positioning posts 20. The positioning posts 20 and positioning holes 21 cooperate to facilitate the positioning of the sealing cover 2 and prevent the sealing cover 2 from being misaligned with the mixing tank 1.

[0043] In this embodiment, as Figure 5 As shown:

[0044] The upper end face of the mixing tank 1 is provided with a sealing rubber gasket 22. The sealing rubber gasket 22 is sleeved on the outside of the positioning post 20. The sealing rubber gasket 22 increases the sealing between the sealing cover 2 and the mixing tank 1, and provides a sealed environment when connecting to the vacuum degassing machine through the external pipe 17.

[0045] In practical use, perfluoropolyether oil is added to the mixing tank 1, and then the sealing cap 2 is placed on top. The sealing cap 2 is locked to the mixing tank 1 using a snap fastener. During the closing process of the sealing cap 2 and the mixing tank 1, the plug 11 at the upper end of the stirring shaft 3 is inserted into the plug interface 12, and at the same time, the snap ring 13 on the drive shaft 5 engages with the snap groove 14, realizing the docking of the drive shaft 5 and the stirring shaft 3. At the same time, the flow channel 10 is connected, and the cooling water is introduced into the flow channel through the first external interface 8 and the second external interface 9 to connect with the inlet and outlet of the external water cooling circulation system. Inside channel 10, cooling water flows along the guide channel 10 inside the drive shaft 5, stirring shaft 3 and stirring blade 4. The stirring motor 16 drives the drive shaft 5 and stirring shaft 3 to rotate the stirring blade 4. The stirring blade 4 stirs the perfluoropolyether oil. When the stirring blade 4 comes into contact with the perfluoropolyether oil, the contact surface generates heat through friction. The temperature of the contact surface between the material and the stirring blade 4 is reduced by heat exchange. At the same time, the external pipe 17 is connected to the vacuum degassing machine to evacuate the fully enclosed stirring chamber, reduce the solubility of air inside the material, and cause the bubbles to overflow.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A perfluoropolyether mixing and homogenization device, characterized in that, include: Fully enclosed mixing chamber; The fully enclosed mixing chamber includes a mixing tank (1) and a sealing cover (2). A mixing shaft (3) is rotatably connected to the center of the mixing tank (1) through a sealing bearing. A mixing blade (4) is fixedly connected to the outside of the mixing shaft (3). A drive shaft (5) is rotatably connected to the center of the sealing cover (2) through a sealing bearing. The ends of the mixing shaft (3) and the drive shaft (5) facing each other both penetrate into the interior of the fully enclosed mixing chamber and are connected. An upper fixed box (6) and a lower fixed box (7) are fixed to the bottom of the sealing cover (2) and the mixing tank (1), respectively. A first external interface (8) and a second external interface (9) are connected to the side walls of the upper fixed box (6) and the lower fixed box (7), respectively. The drive shaft (5) is rotatably connected to the upper fixed box (6) through a sealing bearing. One end of the mixing shaft (3) penetrates into the inner cavity of the lower fixed box (7). The drive shaft (5), stirring shaft (3) and stirring blade (4) are provided with a connecting guide channel (10), and the two ends of the guide channel (10) are connected to the upper fixed box (6) and the lower fixed box (7) respectively.

2. The perfluoropolyether mixing and homogenization device according to claim 1, characterized in that: The upper end of the stirring shaft (3) is fixed with a connector (11), the lower end of the drive shaft (5) is provided with a connector (12), the connector (11) is inserted into the connector (12), the lower end of the drive shaft (5) is fixed with a polygonal snap ring (13) on the outside of the connector (12), and the upper end of the stirring shaft (3) is provided with a snap groove (14) that cooperates with the snap ring (13).

3. The perfluoropolyether mixing and homogenization device according to claim 1, characterized in that: The top of the sealing cover (2) is fixed with a mounting bracket (15), and the top of the mounting bracket (15) is fixed with a stirring motor (16). The output shaft of the stirring motor (16) is fixedly connected to the drive shaft (5) through a coupling.

4. The perfluoropolyether mixing and homogenization device according to claim 1, characterized in that: The top of the sealing cover (2) is connected to an external pipe (17), and a manual gate valve is installed on the external pipe (17).

5. The perfluoropolyether mixing and homogenization device according to claim 2, characterized in that: The outer side of the connector (11) is provided with a groove (18), and a sealing ring (19) is provided inside the groove (18). The outer side of the sealing ring (19) extends to the outer side of the groove (18) and is pressed and fitted against the inner wall of the connector (12).

6. The perfluoropolyether mixing and homogenization device according to claim 1, characterized in that: One side of the sealing cap (2) is hinged to one side of the top of the mixing tank (1), and the other side of the mixing tank (1) and the sealing cap (2) are locked together by a snap fastener.

7. The perfluoropolyether mixing and homogenization device according to claim 1, characterized in that: The top of the mixing tank (1) is fixed with positioning posts (20) around its perimeter, and the bottom of the sealing cover (2) is provided with positioning holes (21) that cooperate with the positioning posts (20).

8. The perfluoropolyether mixing and homogenizing device according to claim 1, characterized in that: The upper end face of the mixing tank (1) is provided with a sealing rubber pad (22), which is sleeved on the outside of the positioning column (20).

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