Separating device for reducing agglomeration of silicon dioxide microspheres

Abstract

The utility model discloses a separating device for reducing agglomeration of silicon dioxide microspheres. The separating device comprises a preparation tank, a stirring mechanism and a material separating mechanism, wherein the stirring mechanism and the material separating mechanism are arranged on the preparation tank. The material separating mechanism comprises a lifting plate, a driving assembly for driving the lifting plate to do lifting motion in the preparation tank and a check ring close to the bottom of the preparation tank, the check ring is matched with the lifting plate, a sealing ring is arranged on the periphery of the lifting plate, and the lifting plate is in sealing connection with the check ring when being driven to the check ring. According to the scheme, the separation mechanism is arranged to separate the silicon dioxide suspension liquid with good monodispersity from the precipitate, so that the existence of agglomerates in the prepared product is avoided, and the product purity is improved. The lifting plate in the material separation mechanism is located above the preparation tank in the preparation process, after reaction is completed, after suspension liquid settles for a period of time, the lifting plate descends to the separation position, a check ring at the separation position and the lifting plate can form a sealing structure, and the separation effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of separation of silicon dioxide microspheres, and more specifically to a separation device for reducing the agglomeration of silicon dioxide microspheres. Background Art

[0002] Submicron-sized monodisperse silica microspheres are widely used in electronic packaging, new display and other fields due to their low thermal expansion coefficient, large specific surface area, good thermal stability, low stress and low friction, and good dielectric properties. Submicron-sized monodisperse silica microspheres prepared by chemical synthesis methods not only have highly uniform particle size, but also have high roundness, few impurities, and controllable metal halogen content. Although chemical synthesis methods have many advantages, there are also some problems, such as the formation of fused balls and the inevitable generation of agglomerates. .

[0003] In order to reduce the presence of agglomerates in silica microspheres, screening methods are usually used for particle classification. At present, traditional screening methods are not applicable to submicron silica microspheres due to their own characteristics. The current mainstream screening equipment is almost used for microspheres with larger particle sizes, and it is expensive and time-consuming. Limited by the lack of existing equipment, it is a more feasible method to choose physical methods to use the difference in suspension and sedimentation time of particles of different particle sizes in the dispersed system to quickly separate and purify and improve product quality and output. Utility Model Content

[0004] The utility model aims to provide a separation device for reducing the agglomeration of silicon dioxide microspheres, so as to solve the technical problems existing in the above-mentioned background technology.

[0005] The technical solution of the utility model provides a separation device for reducing the agglomeration of silicon dioxide microspheres, comprising a preparation tank, a stirring mechanism and a material separation mechanism arranged on the preparation tank;

[0006] The material separation mechanism includes a lifting plate, a driving component for driving the lifting plate to move up and down in the preparation tank, and a retaining ring close to the bottom of the preparation tank. The retaining ring is adapted to the lifting plate, and a sealing ring is arranged on the outer periphery of the lifting plate. When the lifting plate is driven to the retaining ring, it is sealed and connected to the retaining ring.

[0007] In a preferred embodiment, the side surface of the retaining ring is connected to the inner wall of the preparation tank, and the longitudinal section of the retaining ring is an inclined surface.

[0008] In a preferred embodiment, the diameter of the lifting plate is smaller than the inner diameter of the preparation tank.

[0009] In a preferred embodiment, the driving assembly includes a driving motor 1, a threaded rod, a threaded sleeve, a limiting rod and a limiting sleeve, wherein the limiting rod and the threaded rod are respectively arranged on both sides of the lifting plate, and the threaded sleeve and the limiting sleeve are respectively connected to the lifting plate through a connecting rod;

[0010] One end of the threaded rod is connected to the output end of driving motor 1, and the other end is rotatably connected to the mounting block in the preparation tank. The threaded sleeve is threadedly connected to the threaded rod, the limit sleeve is slidably connected to the limit rod, and both ends of the limit rod are fixedly connected to the mounting block respectively.

[0011] In a preferred embodiment, the stirring mechanism includes a second driving motor, a cylinder connected to an output end of the second driving motor, and a stirring member connected to the cylinder.

[0012] In a preferred embodiment, the stirring member includes a stirring rod connected to the output end of the cylinder and a stirring paddle arranged on the stirring rod, and the cylinder drives the stirring paddle to be higher than or lower than the retaining ring.

[0013] In a preferred embodiment, the stirring rod is arranged through the lifting plate, and a sealing sleeve is arranged on the stirring rod.

[0014] The beneficial effects of the technical solution of the utility model are:

[0015] This solution separates the well-dispersed silica suspension and the precipitate by setting up a material separation mechanism, avoiding the presence of agglomerates in the prepared product and improving the purity of the product. The lifting plate in the material separation mechanism is located above the preparation tank during the preparation process. After the reaction is completed and the suspended liquid settles for a period of time, the lifting plate descends to the separation point. The retaining ring at the separation point and the lifting plate can form a sealing structure to ensure the separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 This is a schematic diagram of the internal structure of the utility model.

[0018] Figure 3 This is a schematic diagram of the structure when the lifting plate of the utility model is driven to the retaining ring.

[0019] Figure 4 It is a cross-sectional view of the utility model.

[0020] Explanation of the accompanying drawings: 1 preparation tank, 2 feed port, 3 discharge port 1, 4 water inlet, 5 discharge port 2, 6 material partition mechanism, 7 lifting plate, 8 retaining ring, 9 driving assembly, 10 driving motor 1, 11 threaded rod, 12 threaded sleeve, 13 limiting rod, 14 limiting sleeve, 15 mounting block, 16 connecting rod, 17 stirring mechanism, 18 driving motor 2, 19 cylinder, 20 stirring rod, 21 stirring paddle, 22 sealing sleeve. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the sake of illustration and convenience of description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific purposes.

[0022] like Figure 1-4 As shown, the technical solution of the utility model provides a separation device for reducing the agglomeration of silica microspheres, including a preparation tank 1, a stirring mechanism 17 and a material separation mechanism 6 arranged on the preparation tank 1. The preparation work is carried out in the preparation tank 1, and the preparation tank 1 is provided with a feed port 2, a discharge port 1 3, a water inlet 4, and a discharge port 2 5. The silica suspension is generated after the chemical reaction in the preparation tank 1. After a period of sedimentation, the micron-sized agglomerated particles settle at the bottom to form dense sediments, and the monodisperse silica spheres are uniformly dispersed in the dispersed system. The preparation tank 1 is divided by setting a material separation mechanism 6, and the sediment at the bottom is discharged through the bottom discharge port 2, and the upper monodisperse silica suspension is discharged through the upper discharge port 1 3, and then the water inlet 4 is passed through high-pressure water to clean the preparation tank 1.

[0023] The material separation mechanism 6 includes a lifting plate 7, a driving component 9 for driving the lifting plate 7 to move up and down in the preparation tank 1, and a retaining ring 8 close to the bottom of the preparation tank 1. The retaining ring 8 is adapted to the lifting plate 7. A sealing ring is provided on the outer periphery of the lifting plate 7. When the lifting plate 7 is driven to the retaining ring 8, it is sealed and connected to the retaining ring 8.

[0024] In the above scheme, the lifting plate 7 is located above the preparation tank 1 during the material preparation process. After the material preparation is completed, the driving assembly 9 drives the lifting plate 7 to descend to the retaining ring 8. The retaining ring 8 is arranged at the bottom of the tank body, which is one tenth of the total height of the preparation tank 1. On the one hand, the solid content in the silica microsphere suspension is less than 5% of the total mass, and the agglomerates account for less than 10% of the total solid content. On the other hand, its density is more than twice that of the liquid, so the precipitated agglomerates occupy a small volume, and one tenth of the height is enough to accommodate the agglomerate precipitation. The prepared materials are separated by the lifting plate 7 to achieve the separation of the monodisperse silica suspension and the precipitate, avoid the presence of agglomerates in the prepared product, and improve the purity of the product.

[0025] The side of the retaining ring 8 is connected to the inner wall of the preparation tank 1, and the longitudinal section of the retaining ring 8 is an inclined surface, which is set to prevent the material from settling during the preparation process. The diameter of the lifting plate 7 is smaller than the inner diameter of the preparation tank 1 to ensure that the lifting plate 7 can smoothly pass through the material to reach the retaining ring 8. Because the lifting plate 7 is smooth on the side during the lifting process, it will not cause much agitation to the liquid, and at the same time, there is a certain distance between the side and the inner wall, and the liquid close enough to the bottom of the lifting plate 7 is discharged upward. In addition, the slower lifting speed will not affect the agglomerates that have completely settled at the bottom due to liquid extrusion. Secondly, a part of the well-dispersed monodisperse silica microspheres are also partially deposited after the agglomerates are deposited, covering their surface equivalent to a protective layer. Therefore, during the descent of the lifting plate 7, the agglomerates at the bottom will not be stirred and redispersed.

[0026] The driving assembly 9 includes a driving motor 10, a threaded rod 11, a threaded sleeve 12, a limiting rod 13 and a limiting sleeve 14. The limiting rod 13 and the threaded rod 11 are respectively arranged on both sides of the lifting plate 7. The threaded sleeve 12 and the limiting sleeve 14 are respectively connected to the lifting plate 7 through a connecting rod 16; one end of the threaded rod 11 is connected to the output end of the driving motor 10, and the other end is rotatably connected to the mounting block 15 in the preparation tank 1, the threaded sleeve 12 is threadedly connected to the threaded rod 11, the limiting sleeve 14 is slidably connected to the limiting rod 13, and the two ends of the limiting rod 13 are respectively fixedly connected to the mounting block 15.

[0027] In the above scheme, the driving of the lifting plate 7 is realized by a driving motor 10, and the driving motor 10 drives the threaded rod 11 to rotate, and at the same time, a limiting rod 13 is provided on the other side for limiting. The rotation of the threaded rod 11 drives the threaded sleeve 12 thereon to rotate, thereby realizing the descent of the lifting plate 7. The lifting speed is controlled at 0.5-0.8m / min to reduce the influence of the lifting and lowering of the lifting plate 7 on the slurry. The sealing ring on the outer periphery of the lifting plate 7 can realize a sealing connection with the retaining ring 8.

[0028] The stirring mechanism 17 includes a driving motor 18, a cylinder 19 connected to the output end of the driving motor 18, and a stirring member connected to the cylinder 19. The stirring member includes a stirring rod 20 connected to the output end of the cylinder 19 and a stirring paddle 21 arranged on the stirring rod 20, and the cylinder 19 drives the stirring paddle 21 to be higher or lower than the retaining ring 8. The stirring rod 20 is arranged through the lifting plate 7, and a sealing sleeve 22 is arranged on the stirring rod 20.

[0029] In the above scheme, during the preparation process, the stirring paddle 21 is higher than the retaining ring 8 to ensure its stirring effect. After the preparation is completed, the cylinder 19 drives the stirring rod 20 to move downward, thereby driving the stirring paddle 21 to move below the retaining ring 8 to avoid affecting the descent of the lifting plate 7. After the lifting plate 7 is lowered, the sealing sleeve 22 on the stirring rod 20 seals the through hole in the middle of the lifting plate 7.

[0030] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. A separation device for reducing agglomeration of silica microspheres, characterized in that: It comprises a preparation tank, a stirring mechanism and a material separation mechanism arranged on the preparation tank; The material separation mechanism includes a lifting plate, a driving component for driving the lifting plate to move up and down in the preparation tank, and a retaining ring close to the bottom of the preparation tank. The retaining ring is adapted to the lifting plate, and a sealing ring is arranged on the outer periphery of the lifting plate. When the lifting plate is driven to the retaining ring, it is sealed and connected to the retaining ring.

2. A separation device for reducing agglomeration of silica microspheres according to claim 1, characterized in that: The side surface of the retaining ring is connected to the inner wall of the preparation tank, and the longitudinal section of the retaining ring is an inclined surface.

3. A separation device for reducing agglomeration of silica microspheres according to claim 1, characterized in that: The diameter of the lifting plate is smaller than the inner diameter of the preparation tank.

4. A separation device for reducing agglomeration of silica microspheres according to claim 1, characterized in that: The driving assembly includes a driving motor 1, a threaded rod, a threaded sleeve, a limiting rod and a limiting sleeve, wherein the limiting rod and the threaded rod are respectively arranged on both sides of the lifting plate, and the threaded sleeve and the limiting sleeve are respectively connected to the lifting plate through a connecting rod; One end of the threaded rod is connected to the output end of driving motor 1, and the other end is rotatably connected to the mounting block in the preparation tank. The threaded sleeve is threadedly connected to the threaded rod, the limit sleeve is slidably connected to the limit rod, and both ends of the limit rod are fixedly connected to the mounting block respectively.

5. A separation device for reducing agglomeration of silica microspheres according to claim 1, characterized in that: The stirring mechanism comprises a second driving motor, a cylinder connected to the output end of the second driving motor, and a stirring member connected to the cylinder.

6. A separation device for reducing agglomeration of silica microspheres according to claim 5, characterized in that: The stirring member comprises a stirring rod connected to the output end of the cylinder and a stirring paddle arranged on the stirring rod, and the cylinder drives the stirring paddle to be higher than or lower than the retaining ring.

7. A separation device for reducing agglomeration of silica microspheres according to claim 6, characterized in that: The stirring rod is arranged through the lifting plate, and a sealing sleeve is arranged on the stirring rod.

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