Raw material melting device for producing microcrystalline glass

Abstract

The utility model relates to the technical field of microcrystalline glass production, and disclose a raw material melting device for microcrystalline glass production, including heating jar, the inside bushing of heating jar is equipped with melting bucket, heating jar outside is provided with lifting gantry, the inside sliding joint of lifting gantry has crossbeam, lifting gantry both sides are installed with lifting drive assembly, and lifting drive assembly drives crossbeam to lift, and the middle fixed connection of crossbeam has mounting seat, and the inside installation of mounting seat has stepping motor, and the axle of stepping motor is installed with cylinder cover, and the whole area heating assembly and microbubble bubble assembly are provided on the cylinder cover. The raw material melting device for microcrystalline glass production, through the even heating of whole area heating assembly to melting bucket inside, through the inert gas injection of microbubble bubble assembly to the deep place of glass liquid after complete melting, and the glass liquid under the bubble ascending is pushed to move upward, and the cylinder cover and whole area heating assembly and microbubble bubble assembly are driven slowly by the stepping motor, and further promote the radial even distribution of heat.

Description

Technical Field

[0001] This utility model relates to the field of microcrystalline glass production technology, specifically to a raw material melting device for microcrystalline glass production. Background Technology

[0002] Glass-ceramics are multiphase composite materials in which a microcrystalline phase is precipitated from a base glass with a specific composition under the action of a nucleating agent and through heat treatment. They possess excellent mechanical, thermal, and optical properties.

[0003] In the production of microcrystalline glass, the melting of raw materials is one of the key processes, and its uniformity and melting efficiency directly affect the quality and performance of the final product.

[0004] Currently, existing raw material melting devices for microcrystalline glass production, such as the utility model patent with authorization announcement number CN217628094U, propose a raw material melting device for microcrystalline glass production. This device mainly includes: a rotary drive system at the top, a rotatable melting tank, and a flame-heating system at the bottom. The rotary drive system consists of a motor, a transmission disc, a cylinder, a connecting disc, and inserts. Its working principle is that the cylinder drives the inserts to connect to the melting tank, and the motor drives the melting tank to rotate, causing the internal raw materials to be heated and melted during rotation. Simultaneously, the rotating ball and groove structure at the bottom maintain rotational stability.

[0005] However, the device still suffers from a single heating method and low thermal efficiency. It relies solely on the bottom nozzle for heating. For advanced glasses such as microcrystalline glass and borosilicate glass, which require extremely high melting temperatures and precise temperature field control, this heating method has low heat transfer efficiency and high energy consumption. It is difficult to achieve longitudinal and radial temperature uniformity of the melt, which can easily lead to local overheating or cold spots, affecting the melting quality.

[0006] Therefore, we propose a raw material melting device for the production of microcrystalline glass to solve the problems mentioned above. Utility Model Content

[0007] This utility model provides a raw material melting device for the production of microcrystalline glass, which can solve the problems of single heating method and low thermal efficiency in the prior art. It is difficult to achieve longitudinal and radial temperature uniformity control of the glass melt by relying solely on the bottom burner for heating.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A raw material melting device for the production of microcrystalline glass includes a heating tank, a melting barrel is installed inside the heating tank, a lifting gantry is installed outside the heating tank, a crossbeam is slidably connected inside the lifting gantry, lifting drive components are installed on both sides of the lifting gantry, the lifting drive components drive the crossbeam to rise and fall, a mounting base is fixedly connected to the middle of the crossbeam, a stepper motor is installed inside the mounting base, a cylinder cover is installed on the rotating shaft of the stepper motor, and a full-area heating component and a microbubble bubbling component are installed on the cylinder cover; The heating tank contains evenly distributed annular heating elements for uniform temperature rise.

[0009] Preferably, the global heating assembly includes several electrode heating rods, which are evenly distributed on the cylinder cover, and the length of the electrode heating rods is adapted to the depth of the melting tank.

[0010] Preferably, the electrode heating rod is covered with a protective shell, one end of which is fixedly connected to the cylinder cover, and the protective shell is made of copper.

[0011] Preferably, the microbubble bubbling assembly includes several air guide rods, one end of which is fixedly connected to the cylinder cover, and the other end of which has a permeable micropore. When the cylinder cover is closed with the melting tank cover, the air guide rod extends to the bottom of the melting tank.

[0012] Preferably, the cylinder cover has vent holes distributed around its circumference, which are used to discharge the gas inside the melting tank.

[0013] Preferably, a multi-channel pneumatic-electric slip ring is installed on the shaft of the stepper motor. The multi-channel pneumatic-electric slip ring is used to connect the circuit of the electrode heating rod, the air inlet pipe of the air guide rod, and the exhaust pipe of the exhaust hole.

[0014] Preferably, the annular heating assembly includes several annular heating tubes, which are coaxially arranged with the heating tank and fixedly installed inside the heating tank, with the multiple annular heating tubes being equidistantly distributed among them.

[0015] Preferably, the heating tank has slots on both sides, and the melting tank has handles fixedly connected to both sides. The handles are adapted to the slots and can slide into the slots.

[0016] Preferably, the lifting drive assembly is configured as a linear drive rail, and a main controller is installed on the lifting gantry. Both the linear drive rail and the electrode heating rod are electrically connected to the main controller.

[0017] Preferably, the cylinder cover includes an inner cover and an outer cover. The diameter of the inner cover is adapted to the inner diameter of the melting tank and the inner cover slides in fit with the melting tank. The diameter of the outer cover is the same as the outer diameter of the heating tank. The outer cover is fitted onto the end of the heating tank. A temperature sensor and an industrial camera are installed in the middle of the cylinder cover.

[0018] Compared with the prior art, the beneficial effects achieved by this utility model are: This invention relates to a melting tank housed inside a heating vessel. The ring-shaped heating assembly of the heating vessel provides uniform heating to the entire exterior of the melting tank. When the lid descends to the top of the melting tank and closes, the full-area heating assembly and the microbubble bubbling assembly enter the melting tank. The full-area heating assembly provides uniform heating to the interior of the melting tank, while the microbubble bubbling assembly injects inert gas deep into the completely molten glass, forming a series of rising bubbles that propel the molten glass upwards, creating large-scale circulating convection. A stepper motor drives the lid, the full-area heating assembly, and the microbubble bubbling assembly to rotate slowly, further promoting radially uniform heat distribution. Simultaneously, the inert gas is guided through a gas guide... The rod is conveyed to the bottom of the molten pool and released through micropores to form a large number of bubbles. As these bubbles rise, they drive the molten glass to form a large-scale circulating convection, effectively suppressing longitudinal phase separation caused by component volatilization and promoting the clarification process. Multi-channel gas-electric slip rings ensure the continuous and stable transmission of electricity and gas during rotation. Temperature sensors and industrial cameras monitor the melt state in real time and feed the data back to the main controller, realizing precise closed-loop control of the entire melting process. This solves the problem in existing technologies where heating with only bottom burners is difficult to achieve longitudinal and radial temperature uniformity of the melt, enabling precise control of melting uniformity and temperature for microcrystalline glass, borosilicate glass, and other materials. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall external structure of this utility model; Figure 2 This is a schematic diagram of the internal cross-sectional structure of this utility model; Figure 3 For the present utility model Figure 2 A partially enlarged structural diagram; Figure 4 This is a schematic diagram of the overall unfolded structure of this utility model.

[0020] The components include: 1. Heating tank; 2. Melting tank; 3. Lifting gantry; 4. Crossbeam; 6. Mounting base; 7. Stepper motor; 8. Cylinder cover; 12. Electrode heating rod; 14. Air guide rod; 16. Multi-channel pneumatic-electric slip ring; 17. Annular heating tube; 18. Slot; 19. Handle; 20. Linear drive guide rail; 22. Inner cover; 23. Outer cover; 24. Temperature sensor; 25. Industrial camera. Detailed Implementation

[0021] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0022] Example 1: Please see Figure 1-4This utility model provides a technical solution: A raw material melting device for the production of microcrystalline glass includes a heating tank 1, a melting barrel 2 inside the heating tank 1, a lifting gantry frame 3 outside the heating tank 1, a crossbeam 4 slidably connected inside the lifting gantry frame 3, lifting drive components installed on both sides of the lifting gantry frame 3, the lifting drive components drive the crossbeam 4 to rise and fall, a mounting base 6 fixedly connected to the middle of the crossbeam 4, a stepper motor 7 installed inside the mounting base 6, a cylinder cover 8 installed on the rotating shaft of the stepper motor 7, and a full-area heating component and a microbubble bubbling component installed on the cylinder cover 8; The heating tank 1 contains evenly distributed annular heating elements for uniform heating.

[0023] In the above scheme, the melting tank 2 is fitted inside the heating tank 1. The annular heating component of the heating tank 1 uniformly heats the entire exterior of the melting tank 2. The lifting drive component on the lifting gantry 3 drives the crossbeam 4 to rise and fall. The crossbeam 4 drives the mounting base 6, stepper motor 7, cylinder cover 8, as well as the full-area heating component and microbubble bubbling component to rise and fall synchronously. When the cylinder cover 8 rises, it is convenient to add material to the inside of the melting tank 2, or the melting tank 2 can be removed from the heating tank 1 for cleaning. The melting tank 2 is used for storing and melting microcrystalline glass raw materials. When the cylinder cover 8 descends to the top of the melting tank 2 and closes, the full-area heating component and microbubble bubbling component... The bubble bubbling component enters the melting tank 2 and uniformly heats the interior of the melting tank 2 through the global heating component. The microbubble bubbling component injects inert gas into the depths of the completely molten glass, forming a series of rising bubbles. As the bubbles rise, they act like pistons, pushing the molten glass below upwards, while the molten glass above replenishes the surroundings and downwards, forming a large-scale, gentle circulating convection. This solves the problem in existing technologies where heating with only the bottom burner is difficult to achieve longitudinal and radial temperature uniformity of the melt, enabling precise control of melting uniformity and temperature for microcrystalline glass, borosilicate glass, and other materials.

[0024] The global heating assembly includes several electrode heating rods 12, which are evenly distributed on the cylinder cover 8. The length of the electrode heating rods 12 is adapted to the depth of the melting tank 2.

[0025] In the above scheme, after the cylinder cover 8 is lowered and closed, the electrode heating rod 12 directly enters the microcrystalline glass raw material and directly heats the melt internally by energizing it. This heating method can generate heat from inside the melt, achieving uniform and efficient heat transfer from top to bottom. The stepper motor 7 drives the cylinder cover 8 and the electrode heating rod 12 to rotate. The rotating electrode heating rod 12 further disperses any possible temperature unevenness areas, ensuring that the heat is more evenly distributed radially in the melt. This completely eliminates the temperature gradient and heating cold spots caused by the traditional bottom heating method, providing a precise and uniform heating environment for the microcrystalline glass raw material.

[0026] The electrode heating rod 12 is covered with a protective shell, one end of which is fixedly connected to the cylinder cover 8. The protective shell is made of copper.

[0027] The main function of the protective shell is to physically isolate the electrode heating rod 12 from the high-temperature corrosive glass melt, preventing the electrode from being corroded and contaminated by the glass melt, thereby significantly extending the service life of the electrode heating rod 12; at the same time, the excellent thermal conductivity and high temperature resistance of copper ensure that heat can be efficiently transferred to the glass melt, guaranteeing the stability and reliability of the heating process.

[0028] The microbubble bubbling assembly includes several air guide rods 14. One end of the air guide rod 14 is fixedly connected to the cylinder cover 8, and the other end is provided with a breathable micropore. When the cylinder cover 8 is closed with the melting tank 2, the air guide rod 14 extends to the bottom of the melting tank 2.

[0029] The gas guide rod 14, fixed to the cylinder cover 8, has a venting micropore at its lower end and can extend to the bottom of the melting tank 2. During operation, inert gas is transported to the deepest part of the molten pool through the gas guide rod 14 and a large number of fine bubbles are released through the venting micropores. As the bubbles rise, they push the high-temperature molten glass rich in volatile components upward. The volatile components include nitrogen. O、 wait; The upper layer of melt flows back to the surroundings and downwards to replenish it, thus forming a large-scale, gentle forced circulation convection within the melt. This convection effectively suppresses longitudinal phase separation caused by component volatilization, maintains the uniformity of chemical composition, and the rising bubbles can also adsorb and carry away microbubbles in the melt, significantly promoting the glass clarification process.

[0030] The cylinder cover 8 has vent holes distributed around its circumference, which are used to release the gas inside the melting tank 2.

[0031] The circumferentially distributed vent holes on the cylinder cover 8 are used to discharge the gas inside the melting tank 2. During the bubbling and heating process, including the residual inert gas injected and the gas released by the melt, these vent holes can be discharged in an orderly manner, thereby maintaining the stability of the gas pressure inside the melting tank 2, preventing pressure buildup from affecting the bubbling convection effect and safety, and also providing a stable operating environment for the continuous microbubble bubbling process.

[0032] A multi-channel pneumatic-electric slip ring 16 is installed on the shaft of the stepper motor 7. The multi-channel pneumatic-electric slip ring 16 is used to connect the circuit of the electrode heating rod 12, the air inlet pipe of the air guide rod 14, and the exhaust pipe of the exhaust port.

[0033] When the stepper motor 7 drives the cylinder cover 8, electrode heating rod 12, and air guide rod 14 to rotate, the multi-channel pneumatic-electric slip ring 16 can simultaneously maintain the power supply to the electrode heating rod 12, the inert gas delivery to the air guide rod 14, and the continuous connection of the gas discharge pipeline through the exhaust port without entanglement. Through its special rotary interface design, it realizes the power and fluid transmission between dynamic and static components, ensuring the stable operation of heating, bubbling, and exhaust functions during continuous rotation.

[0034] The annular heating assembly includes several annular heating tubes 17, which are coaxially arranged with the heating tank 1 and fixedly installed inside the heating tank 1. The multiple annular heating tubes 17 are equidistantly distributed among each other.

[0035] These heating tubes provide uniform radiant heating from the side periphery of the melting tank 2, forming a three-dimensional heating system with the electrode heating rod 12 inserted at the top. The annular heating tube 17 maintains the uniformity of the radial temperature of the melt by uniformly heating the wall of the melting tank 2, eliminating the problem of temperature unevenness caused by lateral heat loss, and ensuring that the entire cross-section of the melt is in a uniform temperature field.

[0036] Example 2: Please see Figure 1-4 Furthermore, in conjunction with Embodiment 1, it is further found that the heating tank 1 has slots 18 on both sides, and the melting tank 2 has handles 19 fixedly connected to both sides. The outside of the handles 19 is adapted to the slots 18 and can slide into the slots 18.

[0037] The heating tank 1 has slots 18 on both sides, and the melting tank 2 has handles 19 that are adapted to the slots 18 fixedly connected to both sides. This structure allows the operator to accurately push the melting tank 2 into the heating tank 1 through the handles 19 until the handles 19 are fully engaged in the slots 18. This slot 18 design provides stable radial positioning for the melting tank 2, preventing it from shaking during heating and rotation. It also ensures that the melting tank 2 maintains a uniform distance from the annular heating tube 17 inside the heating tank 1, thereby ensuring uniform heat transfer. At the same time, this design facilitates the quick installation and removal of the melting tank 2, greatly simplifying feeding, cleaning, and maintenance operations.

[0038] The lifting drive assembly is set as a linear drive rail 20, and a main controller is installed on the lifting gantry 3. The linear drive rail 20 and the electrode heating rod 12 are both electrically connected to the main controller.

[0039] In the above scheme, the main controller controls the operation of the linear drive rail 20, thereby driving the crossbeam 4 and all its components to rise and fall smoothly. The main controller can precisely set the lifting position and speed of the cylinder cover 8, as well as the linkage control with components such as the electrode heating rod 12, to ensure the sealing fit between the cylinder cover 8 and the melting tank 2, and the accurate positioning of each component, which is conducive to the automated operation of the device.

[0040] The cylinder cover 8 includes an inner cover 22 and an outer cover 23. The diameter of the inner cover 22 is adapted to the inner diameter of the melting tank 2, and the inner cover 22 slides in fit with the melting tank 2. The diameter of the outer cover 23 is the same as the outer diameter of the heating tank 1. The outer cover 23 covers the end of the heating tank 1. A temperature sensor 24 and an industrial camera 25 are installed in the middle of the cylinder cover 8.

[0041] The cylinder cover 8 adopts a double-layer structure design with an inner cover 22 and an outer cover 23. The diameter of the inner cover 22 is adapted to the inner diameter of the melting tank 2 and can slide to ensure the sealing of the melting tank 2. The diameter of the outer cover 23 is the same as the outer diameter of the heating tank 1, which can completely cover the end of the heating tank 1 to form an effective heat preservation environment. The temperature sensor 24 installed in the middle of the cylinder cover 8 can monitor the melt temperature in real time and feed the data back to the main controller to realize precise closed-loop temperature control. The industrial camera 25 can intuitively observe the distribution of bubbles, convection state and melting status in the melt, realizing process visualization of the melting process. This not only ensures the sealing and heat preservation performance of the equipment, but also realizes real-time monitoring and intelligent control of process parameters.

[0042] The working principle of the raw material melting device for microcrystalline glass production is as follows: The operator first lifts the crossbeam 4 and the cylinder cover 8 assembly through the lifting drive component, loads the raw material into the melting tank 2, and then pushes the melting tank 2 into place precisely along the slots 18 on both sides of the heating tank 1 through the handle 19; then controls the cylinder cover 8 to descend, so that the inner cover 22 forms a sealed fit with the melting tank 2, and the outer cover 23 completely covers the end of the heating tank 1 to form a heat preservation environment. At this time, the electrode heating rod 12 of the full-area heating component and the air guide rod 14 of the microbubble bubbling component penetrate into the interior of the melting tank 2. During operation, the electrode heating rod 12 is directly immersed in the molten glass for internal heating, while the annular heating component provides radiant heating from the side of the melting tank 2, forming a three-dimensional heating structure. The stepper motor 7 drives the cylinder cover 8, the full-area heating component, and the microbubble bubbling component to rotate slowly, further promoting the radial uniform distribution of heat. At the same time, inert gas is transported to the bottom of the molten pool through the gas guide rod 14 and released through the micropores to form a large number of bubbles. As these bubbles rise, they drive the molten glass to form a large-scale circulating convection, effectively suppressing the longitudinal phase separation caused by component volatilization and promoting the clarification process. The multi-channel gas-electric slip ring 16 ensures the continuous and stable transmission of electricity and gas during rotation. The temperature sensor 24 and the industrial camera 25 monitor the state of the melt in real time and feed the data back to the main controller, realizing precise closed-loop control of the entire melting process. Through the synergistic effect of three-dimensional heating, rotational stirring, and microbubble bubbling, the microcrystalline glass raw material is uniformly melted and clarified.

[0043] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A raw material melting device for the production of microcrystalline glass, comprising a heating tank (1), characterized in that: The heating tank (1) is fitted with a melting tank (2) inside. The heating tank (1) is equipped with a lifting gantry frame (3) outside. A crossbeam (4) is slidably connected inside the lifting gantry frame (3). Lifting drive components are installed on both sides of the lifting gantry frame (3). The lifting drive components drive the crossbeam (4) to lift. A mounting base (6) is fixedly connected in the middle of the crossbeam (4). A stepper motor (7) is installed inside the mounting base (6). A cylinder cover (8) is installed on the rotating shaft of the stepper motor (7). A full-area heating component and a microbubble bubbling component are installed on the cylinder cover (8). The heating tank (1) is uniformly equipped with annular heating components for uniform heating.

2. The raw material melting device for microcrystalline glass production according to claim 1, characterized in that: The global heating assembly includes several electrode heating rods (12), which are evenly distributed on the cylinder cover (8). The length of the electrode heating rods (12) is adapted to the depth of the melting tank (2).

3. The raw material melting device for microcrystalline glass production according to claim 2, characterized in that: The electrode heating rod (12) is covered with a protective shell, one end of which is fixedly connected to the cylinder cover (8). The protective shell is made of copper.

4. The raw material melting device for microcrystalline glass production according to claim 3, characterized in that: The microbubble bubbling assembly includes several air guide rods (14). One end of the air guide rod (14) is fixedly connected to the cylinder cover (8), and the other end is provided with a breathable micropore. When the cylinder cover (8) is closed with the melting tank (2), the air guide rod (14) extends to the bottom of the melting tank (2).

5. The raw material melting device for producing microcrystalline glass according to claim 4, characterized in that: The cylinder cover (8) has vent holes distributed around its circumference. The vent holes are used to discharge the gas inside the melting tank (2).

6. The raw material melting device for producing microcrystalline glass according to claim 1, characterized in that: A multi-channel pneumatic slip ring (16) is installed on the shaft of the stepper motor (7). The multi-channel pneumatic slip ring (16) is used to connect the circuit of the electrode heating rod (12), the air inlet pipe of the air guide rod (14), and the exhaust pipe of the exhaust hole.

7. The raw material melting device for microcrystalline glass production according to claim 1, characterized in that: The annular heating assembly includes several annular heating tubes (17), which are coaxially arranged with the heating tank (1) and fixedly installed inside the heating tank (1). The multiple annular heating tubes (17) are equidistantly distributed among each other.

8. The raw material melting device for microcrystalline glass production according to claim 1, characterized in that: The heating tank (1) has slots (18) on both sides, and the melting tank (2) has handles (19) fixedly connected to both sides. The handles (19) are adapted to the slots (18) and can slide into the slots (18).

9. The raw material melting device for producing microcrystalline glass according to claim 1, characterized in that: The lifting drive assembly is configured as a linear drive rail (20), and a main controller is installed on the lifting gantry (3). The linear drive rail (20) and the electrode heating rod (12) are both electrically connected to the main controller.

10. The raw material melting device for producing microcrystalline glass according to claim 1, characterized in that: The cylinder cover (8) includes an inner cover (22) and an outer cover (23). The diameter of the inner cover (22) is adapted to the inner diameter of the melting tank (2). The inner cover (22) slides with the melting tank (2). The diameter of the outer cover (23) is the same as the outer diameter of the heating tank (1). The outer cover (23) is closed on the end of the heating tank (1). A temperature sensor (24) and an industrial camera (25) are installed in the middle of the cylinder cover (8).

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