Liquid silica gel production stirring device

Abstract

The utility model discloses a liquid silica gel production stirring device, which relates to the technical field of mixture operation equipment and comprises a stirring tank, a stirring mechanism, a driving mechanism, a wall scraping mechanism and a circulating mechanism. The stirring tank is used for containing raw materials, and the bottom funnel-shaped design facilitates discharging. Spiral stirring blades of the stirring mechanism are provided with hemispherical bulges, so that up-and-down circulating flow can be formed, and stirring dead angles are avoided. The driving mechanism adopts a variable-frequency motor and can adjust the rotating speed. The wall scraping mechanism enables a scraping plate to be tightly attached to the tank wall through a spring, and adhesion of raw materials is reduced. And the circulating mechanism enables the liquid silica gel to circularly flow to further promote mixing. The device improves the stirring effect and efficiency, reduces the waste of raw materials, has good flexibility and applicability, and can be widely applied to the field of liquid silica gel production.

Description

Technical Field

[0001] This utility model relates to the technical field of mixture handling equipment, specifically to a stirring device for producing liquid silica gel. Background Technology

[0002] Liquid silicone, with its excellent physicochemical properties such as high elasticity, resistance to high and low temperatures, and non-toxicity and odorlessness, is widely used in many industries, including electronics, medical, and food. With the rapid development of these industries, the requirements for the quality and quantity of liquid silicone are constantly increasing.

[0003] Existing mixing devices struggle to ensure thorough mixing of liquid silicone throughout the mixing space. Ordinary paddle mixers can only create a mixing flow field in localized areas, leading to incomplete mixing of some materials and impacting product quality. For example, in the production of electronic components with high performance requirements for liquid silicone, uneven mixing can cause variations in the physical properties of the silicone, reducing the product yield. Due to the viscosity of liquid silicone, it easily adheres to the inner walls of the mixing tank and the mixing blades during mixing. Traditional mixing devices lack effective wall-scraping structures, making it difficult to clean these residues. This not only wastes material but may also introduce new material during subsequent mixing, affecting product purity and performance. Cleaning existing mixing devices often requires tedious manual disassembly and cleaning, resulting in low efficiency and unsatisfactory cleaning results. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a mixing device for producing liquid silica gel, comprising a mixing tank, which is a hollow cylinder with an open top. A circular cover is rotatably connected to the upper end of the mixing tank, and a variable frequency motor is mounted on the top of the circular cover. A drive rod is connected to the output end of the variable frequency motor, and multiple stirring blades are fixed to the inner and outer sides of the driving rod. A drive gear is fixed to the outer side of the upper end of the drive rod, and an external gear ring is fixed to the bottom of the circular cover. Multiple driven gears mesh with the side of the drive gear. The gear meshes with the external gear ring. A scraper rod that is rotatably connected to the round cover is fixed to the shaft of the driven gear. An inverted L-shaped scraper is fixed to the bottom of the scraper rod. The outer wall of the scraper can contact the inner wall of the mixing tank. Two top plates are provided on the upper sides of the round cover. A limiting member composed of two cylinders is fixed to the bottom of the top plate. The diameter of the two cylinders of the limiting member is smaller at the top and larger at the bottom. A limiting ring is provided on the top of the top cover to allow the limiting member to move circumferentially. The limiting member is located inside the limiting ring. Two electric push rods are provided below the two top plates.

[0005] Furthermore, the side wall of the mixing tank is connected to a feed hopper, and the mixing tank is also connected to a circulation structure. The circulation structure includes a feed pipe installed at the bottom of the mixing tank, a circulation pump installed on the side of the mixing tank, the other end of the feed pipe connected to the feed inlet of the circulation pump, and a feeding pipe connected to the discharge outlet of the circulation pump. The other end of the feeding pipe is connected to the feed hopper.

[0006] Furthermore, the bottom of the inner wall of the mixing tank is concave in an arc shape towards the center, and a discharge port is opened at the center of the bottom of the mixing tank. The discharge port is connected to a discharge pipe, and the discharge pipe is connected to a discharge valve.

[0007] Furthermore, the outer surface of the stirring blades is provided with multiple protrusions, which are hemispherical in shape, and the distance between adjacent stirring blades gradually decreases from top to bottom.

[0008] Furthermore, a circular partition is fixed to the outer side of the drive rod, and the partition is located between the bottom of the drive gear and the top of the scraper.

[0009] Furthermore, a cleaning nozzle is installed on one of the top plates, and a water inlet pipe is connected to the end of the cleaning nozzle.

[0010] The beneficial effects of this utility model are as follows:

[0011] 1. The combination of the raised stirring blades and the circulation structure allows the liquid silica gel to circulate up and down within the mixing tank, increasing the contact area between the stirring blades and the liquid silica gel. The circulation mechanism ensures continuous circulation of the liquid silica gel within the mixing tank, further promoting the mixing of raw materials, improving mixing efficiency, shortening mixing time, and enhancing the uniformity and effectiveness of mixing. The wall scraping mechanism can promptly remove the liquid silica gel adhering to the inner wall of the mixing tank, reducing material waste and facilitating the cleaning and maintenance of the mixing tank.

[0012] 2. After the electric push rod is started, the lifting and lowering of the round cover is controlled by the extension and retraction of the piston rod. When it is necessary to clean the equipment or perform equipment maintenance, the electric push rod extends, causing the round cover to rise, so that the cleaning nozzle can be used to clean the stirring blades, scraper rods and other components, improving the convenience of cleaning. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention during stirring;

[0014] Figure 2 This is a schematic diagram of the structure of this utility model during cleaning.

[0015] The following are explanations of the reference numerals in the attached drawings: 1. Mixing tank; 2. Round cover; 3. Variable frequency motor; 4. Drive rod; 5. Mixing blade; 6. Drive gear; 7. External gear ring; 8. Driven gear; 9. Scraper rod; 10. Scraper; 11. Top plate; 12. Limiting component; 13. Feed hopper; 141. Feed pipe; 142. Circulating pump; 143. Feeding pipe; 15. Discharge port; 16. Discharge pipe; 17. Discharge valve; 18. Protrusion; 19. Circular partition; 20. Cleaning nozzle; 21. Electric push rod. Detailed Implementation

[0016] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 do not 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 on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] The present invention will be further described below with reference to the accompanying drawings:

[0019] A stirring device for producing liquid silica gel, such as Figure 1 and Figure 2As shown, the apparatus includes a mixing tank 1, which is a hollow cylinder with an open top. A circular cover 2 is rotatably connected to the upper end of the mixing tank 1. A variable frequency motor 3 is mounted on the top of the circular cover 2. A drive rod 4 is connected to the output end of the variable frequency motor 3. Multiple stirring blades 5 are fixed to the inner and outer sides of the mixing tank 1 via the drive rod 4. Multiple protrusions 18 are provided on the outer surface of the stirring blades 5. The protrusions 18 are hemispherical. The distance between adjacent stirring blades 5 gradually decreases from top to bottom. The drive rod 4 is fixed to the outer surface of the upper end. A drive gear 6 is fixed, and an external gear ring 7 is fixed to the bottom of the round cover 2. Multiple driven gears 8 are meshed on the side of the drive gear 6. The driven gears 8 are engaged with the hobbing of the external gear ring 7. A scraper rod 9 that is rotatably connected to the round cover 2 is fixed to the axis of the driven gear 8. An inverted L-shaped scraper 10 is fixed to the bottom of the scraper rod 9. The outer wall of the scraper 10 can contact the inner wall of the mixing tank 1. A circular partition 19 is fixed to the outer side of the drive rod 4. The partition is located between the bottom of the drive gear 6 and the top of the scraper 10.

[0020] Among them, the variable frequency motor 3 drives the stirring blade 5 to stir the liquid silica gel, and the hemispherical protrusion 18 and the stirring blade 5 with varying spacing enhance the stirring effect; the driving gear 6 drives the driven gear 8, causing the scraper rod 9 and scraper 10 to rotate and scrape off the material on the inner wall of the mixing box 1 to prevent material residue; the circular partition 19 plays a role in isolation and protection, preventing the material from affecting the meshing parts.

[0021] like Figure 1 and Figure 2 As shown, in this embodiment, two top plates 11 are provided on the upper sides of the round cover 2. A limiting member 12 composed of two cylinders is fixed at the bottom of the top plate 11. The diameter of the two cylinders of the limiting member 12 is smaller at the top and larger at the bottom. A limiting ring is provided on the top of the top cover for the limiting member 12 to move circumferentially. The limiting member 12 is located inside the limiting ring. Two electric push rods 21 are provided below the two top plates 11. A cleaning nozzle 20 is installed on one of the top plates 11. The end of the cleaning nozzle 20 is connected to a water inlet pipe.

[0022] Among them, the electric push rod 21 can control the lifting and lowering of the round cover 2, which is convenient for cleaning and maintenance; the limit member 12 and the limit ring cooperate to limit the rotation range of the round cover 2, ensuring stable operation of the equipment; the cleaning nozzle 20 is connected to the water inlet pipe, which facilitates cleaning of the components after the electric push rod 21 lifts the drive rod 4 and the stirring blade 5 connecting components, thereby improving cleaning efficiency.

[0023] like Figure 1 and Figure 2As shown, in this embodiment, the side wall of the mixing tank 1 is connected to a feed hopper 13, and the mixing tank 1 is also connected to a circulation structure. The circulation structure includes a feed pipe 141 installed at the bottom of the mixing tank 1, a circulation pump 142 installed on the side of the mixing tank 1, the other end of the feed pipe 141 being connected to the feed port of the circulation pump 142, the discharge port of the circulation pump 142 being connected to a feeding pipe 143, and the other end of the feeding pipe 143 being connected to the feed hopper 13. The bottom of the inner wall of the mixing tank 1 is concave in an arc shape towards the center, and a discharge port 15 is opened at the center of the bottom of the mixing tank 1. The discharge port 15 is connected to a discharge pipe 16, and the discharge pipe 16 is connected to a discharge valve 17.

[0024] The feeding hopper 13 is used to add materials; the circulation structure circulates materials through the circulation pump 142 to improve the uniformity of mixing; the bottom of the mixing tank 1 is recessed to facilitate material collection; the discharge port 15, the discharge pipe 16, and the discharge valve 17 work together to facilitate the discharge of materials after mixing.

[0025] The working principle of this utility model is as follows:

[0026] When the equipment is running, the variable frequency motor 3 starts, and the output power is transmitted to the stirring blades 5 and the drive gear 6 through the drive rod 4. The variable frequency motor 3 can adjust its speed according to different production needs, thereby changing the stirring speed of the stirring blades 5. During the rotation of the stirring blades 5, the stirring blades 5 push the liquid silica gel to move within the mixing tank 1. As the distance between adjacent stirring blades 5 gradually decreases from top to bottom, materials at different depths within the mixing tank 1 are subjected to different degrees of stirring. At the same time, the hemispherical protrusions 18 on the outer surface of the stirring blades 5 further enhance the disturbance to the materials, making the mixing between the materials more thorough.

[0027] As the drive gear 6 rotates with the drive rod 4, the driven gear 8, meshing with the drive gear 6, begins to rotate under its influence. The rotation of the driven gear 8 causes the scraper rod 9 to rotate around the circular cover 2. The scraper 10 at the bottom of the scraper rod 9 moves along the inner wall of the mixing tank 1 as the scraper rod 9 rotates. The scraper 10 is inverted L-shaped, with its outer wall in contact with the inner wall of the mixing tank 1. During rotation, it scrapes off the liquid silica gel adhering to the inner wall of the mixing tank 1, preventing material residue.

[0028] After the circulating pump 142 starts, it draws the material from the bottom of the mixing tank 1 into the feed pipe 141, and then transports the material back to the feed hopper 13 through the feed pipe 143, where the material re-enters the mixing tank 1 to participate in the mixing. This circulation process allows the material to pass through the mixing zone multiple times, further improving the uniformity and efficiency of the mixing.

[0029] After the electric push rod 21 is started, the lifting and lowering of the round cover 2 is controlled by the extension and retraction of the piston rod. When the equipment needs to be cleaned or maintained, the electric push rod 21 extends, causing the round cover 2 to rise; when the equipment is running normally, the electric push rod 21 shortens, causing the round cover 2 to fall and seal with the mixing tank 1.

[0030] The limiting element 12 moves within the limiting ring, restricting the rotation range of the round cover 2. When the round cover 2 rotates, the limiting element 12 moves circumferentially along the limiting ring to prevent the round cover 2 from rotating excessively, ensuring the stability and safety of the equipment operation.

[0031] During cleaning, the water inlet pipe is connected to a water source, and the cleaning nozzle 20 sprays water onto the inside of the mixing tank 1, the mixing blades 5, the scraper 10, and other components. The impact force of the water flow and the coverage of the spray can wash away the residual materials adhering to the equipment, thus cleaning the equipment.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A liquid silicone rubber production stirring device comprising a stirring tank (1) which is a hollow cylindrical body with an open top, characterized in that: The upper end of the stirring box (1) is rotatably connected with a round cover (2), the top of the round cover (2) is provided with a variable frequency motor (3), the output end of the variable frequency motor (3) is connected with a driving rod (4), the driving rod (4) extends into the stirring box (1) and is fixed with a plurality of stirring paddles (5) on the outer side surface, the upper end of the driving rod (4) is fixed with a driving gear (6) on the outer side surface, the bottom of the round cover (2) is fixed with an external gear ring (7), a plurality of driven gears (8) are engaged on the side of the driving gear (6), the driven gears (8) are engaged with the gear hob of the external gear ring (7), the shaft center of the driven gear (8) is fixed with a wall scraping rod (9) rotatably connected with the round cover (2), the bottom of the wall scraping rod (9) is fixed with a scraper (10) in inverted L shape, the outer wall of the scraper (10) can contact the inner wall of the stirring box (1); two top plates (11) are arranged on the upper side of the round cover (2), the bottom of the top plate (11) is fixed with a limiting piece (12) composed of two cylinders, the diameters of the two cylinders of the limiting piece (12) are small at the top and large at the bottom, a limiting ring is arranged on the top of the top cover for the circumferential movement of the limiting piece (12), the limiting piece (12) is located in the limiting ring, and two electric push rods (21) are arranged below the two top plates (11).

2. The liquid silicone rubber production stirring device according to claim 1, characterized in that: The side wall of the stirring box (1) is connected with a feeding hopper (13), and the stirring box (1) is also connected with a circulating structure, the circulating structure comprises an inlet pipe (141) arranged at the bottom of the stirring box (1), a circulating pump (142) arranged on the side of the stirring box (1), the other end of the inlet pipe (141) is connected with the inlet of the circulating pump (142), the outlet of the circulating pump (142) is connected with a feeding pipe (143), and the other end of the feeding pipe (143) is connected with the feeding hopper (13).

3. The liquid silicone rubber production stirring device according to claim 1, characterized in that: The bottom of the inner wall of the stirring box (1) is arc-shaped and recessed towards the middle part, a discharge port (15) is arranged at the bottom end of the stirring box (1), the discharge port (15) is connected with a discharge pipeline (16), and the discharge pipeline (16) is connected with a discharge valve (17).

4. The liquid silicone rubber production stirring device according to claim 1, characterized in that: A plurality of protrusions (18) are arranged on the outer surface of the stirring paddle (5), the protrusions (18) are semispherical, and the distance between adjacent stirring paddles (5) gradually decreases from top to bottom.

5. The liquid silicone rubber production stirring device according to claim 1, characterized in that: A circular partition plate (19) is fixed on the outer side surface of the driving rod (4), and the partition plate is arranged between the bottom of the driving gear (6) and the top of the scraper (10).

6. The liquid silicone rubber production stirring device according to claim 1, characterized in that: A cleaning nozzle (20) is arranged on one of the top plates (11), and the end of the cleaning nozzle (20) is connected with a water inlet pipe.

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