A low-swing high-efficiency homogenizing stirring structure and stirring method

Abstract

The application discloses a low-swing high-efficiency homogenizing stirring structure and a stirring method, fully considers the uneven force generated by the single-side glass flowing into the stirring tank, influences the long-term stable operation of the stirrer, and the single-side flowing glass liquid is easy to form a viscosity temperature segregation phenomenon near the end, which has a weakening influence on the homogenization effect. The uneven force transition of the fluid before entering the stirring tank body is realized by increasing the special-shaped buffer pool, the glass liquid is continuously injected into the stirring tank in a 360-degree overflow manner, the rotation stability of the whole stirrer is significantly improved, and full protection is provided for the long-life reliability and large-flow high-efficiency homogenization of the equipment. The glass liquid can realize uniform stress on the stirrer in the circumferential direction, significantly improve the abnormal swing problem of the stirrer in the operation process, and realize high-efficiency homogenization of the large-flow glass liquid, so as to provide equipment protection for the manufacturing of large-flow substrate glass.

Description

Technical Field

[0001] This invention belongs to the field of substrate glass production technology, and relates to a stirring structure and stirring method with low oscillation and high efficiency homogenization. Background Technology

[0002] The core of substrate glass manufacturing lies in the hot end, encompassing the furnace, platinum channel, and forming zone. The average temperature in this hot end region exceeds 1500℃, with some areas reaching 1650℃, posing a significant challenge to equipment stability and long-term lifespan. The stirring system in the platinum channel region is primarily responsible for homogenizing the composition and texture of the high-temperature clarified molten glass. Using the stirrer as the core component, it continuously and uniformly rotates, performing real-time stretching and shearing operations on the molten glass in the stirring tank to achieve high-quality glass production. Currently, the industry commonly uses a stirring system that connects vertically distributed stirring tanks to a transition pipe on one side, forming a channel for the molten glass. However, this structure has a drawback: the unidirectional injection of molten glass exerts a one-way force on the stirrer's rotation. This phenomenon becomes increasingly pronounced as the glass flow rate increases. Typically, in the later stages of production, fatigue deformation of some components due to long-term operation further exacerbates abnormal stirrer oscillations, potentially leading to equipment safety issues. In addition, unilateral glass injection can also cause viscosity-temperature segregation during stirring, meaning that too much high-density glass flows in close to the inlet side, which will have a certain impact on the overall homogenization effect of the molten glass. Summary of the Invention

[0003] The purpose of this invention is to solve the stability problem caused by the unilateral action of the glass fluid on the stirrer and the viscosity-temperature segregation problem of the glass liquid near the inflow side in the existing channel stirring system, and to provide a stirring structure and stirring method with low oscillation and high efficiency homogenization.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] The present invention proposes a low-oscillation, high-efficiency homogenizing stirring structure, comprising a stirring inlet pipe and a stirring tank, wherein the stirring tank includes a buffer pool and a stirring container; the stirring container is connected and installed below the buffer pool, and the stirring inlet pipe is connected and installed on the wall of the buffer pool; a stirrer is provided in the stirring tank.

[0006] Preferably, the stirrer includes a stirring shaft and a first stirring blade, the first stirring blade being mounted on the stirring shaft.

[0007] Preferably, there are a plurality of first stirring blades, which are mounted on the stirring shaft at equal intervals.

[0008] Preferably, a second stirring blade is also installed on the stirring shaft, and the second stirring blade is an inverted L-shape.

[0009] Preferably, there are several second stirring blades, which are installed at equal intervals along the circumference of the stirring shaft, and the thickness of the second stirring blades ranges from 8mm to 12mm.

[0010] Preferably, the installation height of the stirring inlet pipe is lower than that of the stirring container.

[0011] Preferably, the height difference between the stirring inlet pipe and the stirring container is in the range of 5mm to 20mm.

[0012] Preferably, the diameter of the stirring container is in the range of 330mm to 380mm, the diameter of the buffer tank is in the range of 410mm to 600mm, and the height of the buffer tank is in the range of 160mm to 200mm.

[0013] Preferably, the buffer pool has a U-shaped structure.

[0014] The present invention proposes a stirring method for a low-oscillation, high-efficiency homogenizing stirring structure, comprising:

[0015] The stirring inlet pipe is installed on the buffer tank to buffer the glass liquid flowing into the stirring inlet pipe;

[0016] The buffered molten glass enters the mixing container under the action of the stirrer;

[0017] The stirring vessel causes the molten glass to flow in 360° directions to achieve stirring.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention proposes a low-oscillation, high-efficiency homogenization stirring structure. Considering the way molten glass enters the stirring tank, the original structure's direct, one-sided inflow of molten glass is changed to a buffered, dispersed inflow. This transforms the unilateral force exerted by the molten glass on the stirrer into a uniform force along the circumference, effectively mitigating the negative impact of the molten glass on the overall stability of the stirrer. Based on this principle, this invention fully considers the uneven force generated by unilateral glass inflow into the stirring tank, which affects the long-term stable operation of the stirrer. Furthermore, unilateral inflow of molten glass easily leads to viscosity-temperature segregation near the end, weakening the homogenization effect. By adding a shaped buffer tank, the force transition of the fluid before entering the stirring tank is achieved. The molten glass is continuously injected into the stirring tank via a 360° overflow method, significantly improving the rotational stability of the entire stirrer and providing ample assurance for long-life reliability and high-flow-rate, high-efficiency homogenization. It achieves uniform force of the molten glass on the stirrer in the circumference, significantly improving the problem of abnormal oscillation during operation and providing efficient homogenization for large-flow-rate molten glass.

[0020] Furthermore, the independent second stirring blade designed at the top of the stirrer provides initial flow stabilization for the overflowing molten glass, offering a better foundation for the subsequent formal stirring and homogenization. The structure of this invention enables future stirring equipment and processes with higher flow rates, greater stability, and longer lifespan.

[0021] Furthermore, the top of the stirring inlet pipe is slightly lower than the top of the standard stirring section. Considering the pressure loss height formed by the molten glass in the system, the top of the stirring inlet pipe is generally 5mm to 20mm lower than the top of the standard stirring section. This allows the molten glass from the stirring inlet pipe to first enter the irregularly shaped buffer tank. Once the fresh molten glass accumulates to the upper edge of the irregularly shaped buffer tank, it overflows evenly along the circular interface into the standard stirring section. At this point, there will be no unilateral glass pushing force on the stirrer. In the traditional stirring method where molten glass flows in from one side, the stirring tank is longitudinally distributed, and the molten glass flows into the tank from a transverse pipe on one side. This results in a unidirectional pushing force on the stirrer, affecting the stability of the stirring. Therefore, the irregularly shaped buffer tank structure of this invention can effectively improve this problem.

[0022] Furthermore, the material of the second stirring blade is completely consistent with the main structure of the stirrer. It is generally a reinforced platinum-rhodium alloy material with sufficient strength and high corrosion resistance. The overall thickness of the blade reaches 8mm to 12mm, and the shape is an inverted "L" shape with the bending direction facing downward, which plays a role in guiding the flow. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the low-oscillation, high-efficiency homogenizing stirring structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the overall shape of the irregularly shaped stirring tank of the present invention;

[0026] Figure 3 This is a schematic diagram of a traditional stirring method where molten glass flows in from one side.

[0027] Figure 4 This invention relates to a stirrer with an additional independent blade at the top;

[0028] Figure 5 This is a schematic diagram illustrating the operating principle and function of the present invention.

[0029] In the figure: 1 is the stirring inlet pipe; 2 is the stirring tank; 3 is the stirrer; 4 is the guiding electrode; 5 is the buffer tank; 6 is the stirring container; 7 is the stirring shaft; 8 is the first stirring blade; 9 is the second stirring blade; 10 is the glass melt; 11 is the glass melt with viscosity-temperature segregation. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention 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 of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 the present invention according to the specific circumstances.

[0036] The present invention will now be described in further detail with reference to the accompanying drawings:

[0037] This invention proposes a low-oscillation, high-efficiency homogenizing stirring structure, such as... Figures 1 to 5 As shown, the system includes a stirring inlet pipe 1 and a stirring tank 2. The stirring tank 2 includes a buffer pool 5 and a stirring container 6. The stirring container 6 is connected and installed below the buffer pool 5, and the stirring inlet pipe 1 is connected and installed on the wall of the buffer pool 5. A stirrer 3 is provided in the stirring tank 2. The buffer pool 5 has a U-shaped structure. The irregularly shaped buffer pool uses a circular tube, and the overall pipe diameter must be greater than or equal to 25% to 60% of the standard stirring tank pipe diameter. The buffer pool 5 is generally circular, with a cross-sectional shape of approximately "U"-shaped rotating body, and has the function of accommodating glass containers.

[0038] The stirrer 3 includes a stirring shaft 7 and first stirring blades 8, the first stirring blades 8 being mounted on the stirring shaft 7. Second stirring blades 9, which are inverted L-shaped, are also mounted on the stirring shaft 7. There are several first stirring blades 8, which are mounted at equal intervals on the stirring shaft 7. There are also several second stirring blades 9, which are mounted at equal intervals along the circumference of the stirring shaft 7. The thickness of the second stirring blades 9 ranges from 8mm to 12mm.

[0039] The installation height of the stirring inlet pipe 1 is lower than that of the stirring container 6. The difference in installation height between the stirring inlet pipe 1 and the stirring container 6 ranges from 5mm to 20mm. The diameter of the stirring container 6 ranges from 330mm to 380mm, the diameter of the buffer tank 5 ranges from 410mm to 600mm, and the height of the buffer tank 5 ranges from 160mm to 200mm.

[0040] refer to Figure 1 This is a schematic diagram of the overall method of the present invention. The main structure includes a stirring inlet pipe 1, a stirring tank 2, a stirrer 3, and a flow guiding electrode 4. The core design of the present invention is the stirring tank 2, the stirrer 3, and the method on which they are based. The stirring inlet pipe 1 is a necessary structure in the original scheme, and the flow guiding electrode 4 is a heating electrode that also exists in the original structure. A complete circuit is formed by two sets, one at the top and one at the bottom, to input current to the entire stirring tank.

[0041] refer to Figure 2 The specific structural design of the mixing tank 2 mainly includes the irregularly shaped buffer tank 5 and the mixing container 6. As shown in the figure, the top of the mixing inlet pipe 1 is slightly lower than the top of the mixing container 6. Considering the pressure loss height formed by the molten glass in the system, the top of the mixing inlet pipe 1 is generally 5mm to 20mm lower than the top of the mixing container 6. This allows the molten glass from the mixing inlet pipe 1 to first enter the irregularly shaped buffer tank 5. After the new molten glass accumulates to the upper edge of the irregularly shaped buffer tank 5, it overflows evenly along the circular interface into the mixing container 6. At this time, it will not cause a similar effect to the agitator 3. Figure 3 The unilateral glass pushing force shown is a traditional unilateral glass liquid inflow stirring method. Its stirring tank 2 is longitudinally distributed, and the glass liquid 10 flows into the tank from a horizontal pipe on one side. This will result in a unidirectional pushing force on the stirrer 3, which will affect the stability of stirring. Therefore, the irregular buffer tank 5 structure of the present invention can effectively improve this problem.

[0042] The irregularly shaped buffer tank 5 needs to be processed separately. It is formed in one piece using a mold and then the local structure is adjusted. Finally, it is welded to the mixing container 6. Both are made of platinum-rhodium alloy, and the Rh content is generally controlled in the range of 10% to 25% to ensure the machinability of the material and sufficient high-temperature strength.

[0043] The diameter of the current stirring container 6 is generally in the range of 330mm to 380mm depending on the glass flow rate, while the maximum diameter of the irregular buffer tank 5 is generally designed to be in the range of 410mm to 600mm relative to the diameter of the stirring container 6. The height of the buffer tank 5 where the glass liquid is located is about 160mm to 200mm, which can maintain a residence time of about 40s to 100s, so that the glass liquid can reach a relatively stable state before overflowing into the stirring container 6.

[0044] 1. For the fresh molten glass that has just overflowed into the stirring container 6, it is necessary to perform targeted preliminary lateral stirring to ensure uniform inflow of the molten glass in the circumferential direction. Based on this invention, a stirrer 3 with a second stirring blade 9 at the top is designed, and its structure is as follows: Figure 4 As shown, a separate dipping blade is added to the traditional agitator. The second agitator blade 9 has a larger diameter than the main agitator blade 8 below, and its distance from the agitator container 6 is generally designed to be 15mm, which can maximize the agitation of the overflowing glass. The material of the second agitator blade 9 is completely consistent with the main structure of the agitator, generally a reinforced platinum-rhodium alloy material, which has sufficient strength and high corrosion resistance. The overall thickness of the blade reaches 8mm to 12mm, and its shape is an inverted "L" shape with the curvature direction facing downward, which plays a role in guiding the flow. The rotation range is 80% to 90% of the diameter of the standard agitator tank. The second agitator blade 9 is welded to the agitator shaft 7, and one or two to six equally spaced blades can be arranged in the circumferential direction. By combining the second agitator blade 9 with the irregularly shaped buffer tank 5, the glass liquid entering the agitator container 6 is fully diverted and agitated, which can eliminate the effects of... Figure 3 The viscosity-temperature segregation glass melt 11 shown is located near the side of the single-sided material supply. The viscosity-temperature segregation glass is glass that is different from most glass melts, which have excessive viscosity and density. These abnormal glasses have an adverse effect on the overall glass quality.

[0045] The irregularly shaped buffer tank 5 designed in this invention forms a circumferentially uniformly dispersed glass liquid flowing into the stirring container 6. The lateral force generated by the stirrer 3 is also changed from a single-sided distribution to a symmetrical distribution. Figure 5 As shown, the viscosity-temperature segregation glass melt 11 does not exert a deflection force on the stirrer 3, but rather a symmetrical force along the circumference, making the overall operation of the stirrer more stable. Especially after operating at high flow rates for more than 3 years, the sway will still not exceed 2mm. This will provide sufficient guarantee for the industrial application of subsequent designs for larger capacity equipment and longer-life reliability equipment.

[0046] The present invention proposes a stirring method for a low-oscillation, high-efficiency homogenizing stirring structure, comprising the following steps:

[0047] Step 1: Install the stirring inlet pipe 1 on the buffer tank 5 to buffer the glass liquid flowing into the stirring inlet pipe 1;

[0048] Step 2: The buffered molten glass enters the stirring container 6 under the action of the stirrer 3;

[0049] Step 3: Stirring is achieved by making the molten glass flow in a 360° direction under the action of the stirring container 6.

[0050] Specifically:

[0051] Between the stirring inlet and the stirring tank, the flow rate and direction of the columnar molten glass flowing in from one side are buffered. This prevents the molten glass from directly entering the stirring tank, instead creating a horizontally distributed circulation above it. The circulation accumulates before overflowing, allowing the molten glass to flow into the stirring tank in a 360° direction. The overflowing molten glass is then further stabilized by localized agitation. The molten glass flow rate is in the range of 1000 kg / h to 1300 kg / h. The molten glass temperature is controlled between 1400℃ and 1460℃. The flow rate of the columnar molten glass flowing in from one side is between 3 mm / s and 6 mm / s. The buffering of flow rate and direction is achieved by lowering the stirring inlet height below the upper edge of the standard stirring tank and pre-setting an independent glass space. The molten glass about to flow into the standard stirring tank is first buffered through this space before entering the standard stirring tank. The buffer tank can hold approximately 50 kg to 150 kg of molten glass.

[0052] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A low-oscillation, high-efficiency homogenizing stirring structure, characterized in that, The system includes a stirring inlet pipe (1) and a stirring tank (2). The stirring tank (2) includes a buffer pool (5) and a stirring container (6). The stirring container (6) is connected and installed below the buffer pool (5), and the stirring inlet pipe (1) is connected and installed on the wall of the buffer pool (5). A stirrer (3) is provided in the stirring tank (2). The stirrer (3) includes a stirring shaft (7) and a first stirring blade (8). The first stirring blade (8) is installed on the stirring shaft (7). A second stirring blade (9) is also installed on the stirring shaft (7). The second stirring blade (9) is an inverted L-shape. The buffer pool (5) has a U-shaped structure. The second stirring blade is independently set on the upper part of the stirrer; there are several second stirring blades (9), and several second stirring blades (9) are installed at equal intervals in the circumferential direction of the stirring shaft (7), and the installation height of the stirring inlet pipe (1) is lower than that of the stirring container (6).

2. The low-oscillation, high-efficiency homogenizing stirring structure according to claim 1, characterized in that, There are several first stirring blades (8), and several first stirring blades (8) are installed on the stirring shaft (7) at equal intervals.

3. The low-oscillation, high-efficiency homogenizing stirring structure according to claim 1, characterized in that... The thickness of the second stirring blade (9) ranges from 8 mm to 12 mm.

4. The low-oscillation, high-efficiency homogenizing stirring structure according to claim 1, characterized in that, The installation height difference between the stirring inlet pipe (1) and the stirring container (6) ranges from 5mm to 20mm.

5. The low-oscillation, high-efficiency homogenizing stirring structure according to claim 1, characterized in that, The diameter of the stirring container (6) ranges from 330mm to 380mm, the diameter of the buffer tank (5) ranges from 410mm to 600mm, and the height of the buffer tank (5) ranges from 160mm to 200mm.

6. A stirring method for a low-oscillation, high-efficiency homogenizing stirring structure, characterized in that, The stirring structure employing any one of claims 1 to 5, characterized by low oscillation and high-efficiency homogenization, comprises: Install the stirring inlet pipe (1) on the buffer tank (5) to buffer the glass liquid flowing into the stirring inlet pipe (1); The buffered glass liquid enters the stirring container (6) under the action of the stirrer (3); The glass melt is stirred by flowing in a 360° direction under the action of the stirring container (6).

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