Platinum feed system and control method

Abstract

This application discloses a platinum feeding system and control method. The platinum feeding system includes a furnace, a connecting pipe, a stirring pot, a feeding pipe, and a discharging pipe. One end of the connecting pipe is connected to the furnace. The stirring pot has an inner cavity and is connected to the connecting pipe. The stirring pot is used to stir the molten glass flowing in from the connecting pipe. In the direction of gravity, the cross-sectional area of ​​the inner cavity perpendicular to the direction of gravity decreases from bottom to top. One end of the feeding pipe is connected to the stirring pot. One end of the discharging pipe is connected to the end of the feeding pipe away from the stirring pot. In this application, the connecting pipe, feeding pipe, and discharging pipe are all made of platinum. The stirring pot stirs the molten glass, making the molten glass homogenized and reducing the area of ​​evaporation of the molten glass. This solves the problems of gas lines, stones or nodules, streaks or dark bands that easily occur during the glass tube forming process.

Description

Technical Field

[0001] This application relates to the field of glass manufacturing technology, and in particular to a platinum feeding system and control method. Background Technology

[0002] The process flow of Dana Farad tubes is as follows: raw materials of a certain proportion are fed into the furnace; molten glass flows from the working pool of the furnace to the feed channel, and then winds around the swirl tube of the Dana forming machine through the flow channel.

[0003] Using traditional feed channels can easily lead to problems such as air lines, stones or nodules, streaks or dark bands during the final glass tube forming process, which cannot meet the requirements of high-quality tube drawing. Summary of the Invention

[0004] The main purpose of this application is to provide a platinum feeding system and control method, which aims to solve the problems that are easy to occur in the final glass tube forming process when using traditional feed channels, such as air lines, stones or nodules, streaks or dark bands.

[0005] To achieve the above objectives, this application provides a platinum feeding system and control method, including a furnace, a connecting pipe, a stirring pot, a feeding pipe, and a discharging pipe, wherein one end of the connecting pipe is connected to the furnace; the stirring pot has an inner cavity and is connected to the connecting pipe, and the stirring pot is used to stir the molten glass flowing in from the connecting pipe, wherein, in the direction of gravity, the cross-sectional area of ​​the inner cavity perpendicular to the direction of gravity decreases from bottom to top; one end of the feeding pipe is connected to the stirring pot; and one end of the discharging pipe is connected to the end of the feeding pipe away from the stirring pot.

[0006] Optionally, the side wall of the kiln is provided with a through hole, and one end of the connecting pipe is inserted into the through hole; the platinum feeding system also includes a flange, which is fitted around the outer periphery of the connecting pipe and located outside the kiln, and the flange covers the gap between the connecting pipe and the through hole.

[0007] Optionally, the side wall of the mixing vessel has a jacketed space; the platinum feeding system also includes a radiant heating component disposed within the jacketed space; wherein the radiant heating component is used to uniformly heat the mixing vessel.

[0008] Optionally, in the direction of gravity, the inner cavity of the mixing pot is divided into a small chamber, a connecting chamber and a large chamber connected in sequence, wherein the small chamber is located above the large chamber and the cross-sectional area of ​​the small chamber perpendicular to the direction of gravity is the smallest.

[0009] Optionally, the connection area between the connecting pipe and the mixing pot is located in the large chamber near the small chamber, and the connection area between the feeding pipe and the mixing pot is located in the large chamber away from the small chamber.

[0010] Optionally, the outer periphery of the connecting pipe, mixing pot, feeding pipe and discharging pipe are all equipped with refractory material for heat insulation.

[0011] Optionally, the platinum feeding system also includes two first electrode plates, which are spaced apart on the outer periphery of the connecting tube; wherein the two first electrode plates are used to heat the connecting tube.

[0012] Optionally, the platinum feeding system also includes three second electrode plates. Two second electrode plates are respectively disposed on the outer periphery of the feeding pipe and the discharging pipe, and the third second electrode plate is disposed at the connection between the feeding pipe and the discharging pipe. Among them, the two second electrode plates near the feeding pipe are used to heat the feeding pipe, and the two second electrode plates near the discharging pipe are used to heat the discharging pipe.

[0013] Furthermore, to achieve the above objectives, this application also provides a platinum feeding system control method, which includes maintaining the glass melt level in the furnace above the inner cavity of the furnace in the direction of gravity; heating the connecting pipe to a first preset temperature; heating the stirring pot to a second preset temperature; stirring the glass melt inside the stirring pot after the glass melt level in the stirring pot is level with the glass melt level in the furnace; heating the feeding pipe to a third preset temperature; and heating the discharge pipe to a fourth preset temperature.

[0014] Optionally, the first preset temperature is between 1330-1380℃, the second preset temperature is between 1300-1350℃, the third preset temperature is between 1200-1300℃, and the fourth preset temperature is between 1200-1250℃.

[0015] This application discloses a platinum feeding system. During operation, molten glass flows from the furnace into a connecting pipe, and then from the connecting pipe into the inner cavity of a stirring pot. The stirring pot agitates the molten glass, achieving homogenization. The agitated molten glass is first cooled through a feeding pipe and finally flows out from the discharge pipe, winding onto the swirl drum of the Dana forming machine. The connecting pipe, feeding pipe, and discharge pipe are all made of platinum, which effectively reduces the corrosion of the pipeline by high-temperature molten glass compared to traditional feed channels, solving the problem of molten glass corrosion in traditional feed channels. This design addresses the issues of stones or nodules that may occur during glass forming. Simultaneously, the mixing tank agitates the molten glass, homogenizing it and resolving the problems of uneven molten glass in traditional feed channels, which can lead to streaks or dark bands during glass forming. Furthermore, in the direction of gravity, the cross-sectional area of ​​the inner cavity perpendicular to the direction of gravity decreases from bottom to top. When the molten glass is in the inner cavity of the mixing tank, the higher the molten glass level, the smaller the area for evaporation, resulting in more uniform composition and reducing the occurrence of stones, nodules, streaks, or dark bands during glass forming. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of a platinum feeding system provided in this application embodiment;

[0017] Figure 2 A flowchart of a platinum feeding system control method provided in an embodiment of this application.

[0018] In the diagram: 1. Kiln; 11. Through hole; 2. Connecting pipe; 3. Mixing pot; 31. Mixing shaft; 4. Feeding pipe; 5. Discharge pipe; 6. Flange; 7. Radiant heating assembly; 8. First electrode plate; 9. Second electrode plate.

[0019] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0024] Reference Figure 1 This application provides a platinum feeding system and control method, which may include a furnace 1, a connecting pipe 2, a stirring pot 3, a feeding pipe 4, and a discharging pipe 5. One end of the connecting pipe 2 is connected to the furnace 1. The stirring pot 3 has an inner cavity and is connected to the connecting pipe 2. The stirring pot 3 is used to stir the molten glass flowing in from the connecting pipe 2. In the direction of gravity, the cross-sectional area of ​​the inner cavity perpendicular to the direction of gravity decreases from bottom to top. One end of the feeding pipe 4 is connected to the stirring pot 3. One end of the discharging pipe 5 is connected to the end of the feeding pipe 4 away from the stirring pot 3.

[0025] This application discloses a platinum feeding system. During operation, molten glass flows from the furnace 1 into the connecting pipe 2, and then from the connecting pipe 2 into the inner cavity of the stirring pot 3. The stirring pot 3 stirs the molten glass to achieve homogenization. The stirred molten glass is first cooled through the feeding pipe 4, and finally flows out from the discharge pipe 5, winding around the swirl tube of the Dana forming machine. The connecting pipe 2, feeding pipe 4, and discharge pipe 5 are all made of platinum, which effectively reduces the corrosion of the pipeline by the high-temperature molten glass compared to traditional feed channels, solving the problem of glass corrosion in traditional feed channels. The molten glass erosion can cause stones or nodules to appear during the glass forming process. At the same time, the stirring pot 3 stirs the molten glass, making it homogenized and solving the problem of uneven molten glass in traditional feed channels, which can cause streaks or dark bands during the glass forming process. In addition, in the direction of gravity, the cross-sectional area of ​​the inner cavity perpendicular to the direction of gravity decreases from bottom to top. When the molten glass is in the inner cavity of the stirring pot 3, the higher the molten glass level, the smaller the area for evaporation of the molten glass, and the more uniform the composition of the molten glass, reducing the occurrence of stones, nodules, streaks or dark bands during the glass forming process.

[0026] Furthermore, refractory materials for heat insulation are installed on the outer periphery of the connecting pipe 2, mixing pot 3, feeding pipe 4 and discharging pipe 5. This increases the energy utilization rate of the connecting pipe 2, mixing pot 3, feeding pipe 4 and discharging pipe 5, reduces heat loss, and thus reduces production costs.

[0027] It should be understood that when the temperature of the molten glass is low, the fluidity of the molten glass will be poor. When using the platinum feeding system, the connecting pipe 2 and the mixing pot 3 should be heated first. In this way, the molten glass in the furnace 1 can flow into the inner cavity of the mixing pot 3 through the connecting pipe 2. At this time, the feeding pipe 4 is in an unheated state. The molten glass in the mixing pot 3 will not flow out of the mixing pot 3 through the feeding pipe 4. The level of the molten glass in the mixing pot 3 will continue to rise. When it rises to the predetermined height, the feeding pipe 4 and the discharge pipe 5 are heated. The molten glass that has been stirred evenly in the mixing pot 3 can then flow out of the platinum feeding system through the feeding pipe 4 and the discharge pipe 5 and be wound on the spinning drum of the Dana forming machine.

[0028] It should be noted that the horizontal plane where the lowest point of the mixing pot 3 is located in the direction of gravity is taken as the reference plane, and all the heights mentioned above are based on the reference plane.

[0029] The predetermined height can be limited by controlling the height of the molten glass in the furnace 1. When the inner cavity is filled with molten glass, the height of the molten glass in the inner cavity reaches the maximum height. In other words, when the height of the molten glass in the furnace 1 is greater than the maximum height, the inner cavity will be filled with molten glass. When the height of the molten glass in the furnace 1 is less than or equal to the maximum height, the molten glass in the inner cavity will be at the same level as the molten glass inside the furnace 1.

[0030] Furthermore, the height of the molten glass in the furnace 1 can be controlled to be as close as possible to the maximum height, that is, the surface area of ​​the molten glass in the inner cavity can be kept within a small range. At this time, the molten glass is stirred at high temperature, and the amount of molten glass volatilization is greatly reduced, which effectively reduces the occurrence of stones or nodules, streaks or dark bands in the subsequent glass forming process.

[0031] It should be understood that the mixing pot 3 is equipped with components for stirring the molten glass. For example, the mixing pot 3 is equipped with a stirring shaft 31. The axial direction of the stirring shaft 31 can be the same as the direction of gravity. In the direction of gravity, the mixing pot 3 has a top and a bottom that are relatively arranged. The stirring shaft 31 can pass through the top or the bottom and be rotatably connected to the mixing pot 3. It can be understood that part of the structure of the stirring shaft 31 is located inside the mixing pot 3, and part of the structure is located outside the mixing pot 3. The part of the stirring shaft 31 located outside the mixing pot 3 is connected to the transmission structure. The transmission structure drives the stirring shaft 31 to rotate around the axial direction of the stirring shaft 31. The structure of the stirring shaft 31 located inside the mixing pot 3 is equipped with stirring blades. In this way, the transmission structure drives the stirring shaft 31 to rotate, and the stirring shaft 31 further drives the stirring blades to stir the molten glass in the mixing pot 3, so as to homogenize the molten glass.

[0032] Of course, the setting of the stirring shaft 31 is not fixed. The axis of the stirring shaft 31 can also be horizontal or other directions, as long as it can complete the stirring of the glass liquid in the stirring pot 3. The specific setting can be determined according to the actual situation.

[0033] Alternatively, the aforementioned transmission structure can be a motor, which is connected to the stirring shaft 31 via a coupling. In this way, when the motor rotates, it can drive the stirring shaft 31 to rotate around the axial direction of the stirring shaft 31.

[0034] Reference Figure 1 In an exemplary embodiment, the inner cavity of the stirring pot 3 is divided into a small chamber, a connecting chamber and a large chamber connected in sequence in the direction of gravity. The small chamber is located above the large chamber, and the cross-sectional area of ​​the small chamber perpendicular to the direction of gravity is the smallest.

[0035] Specifically, in the direction of gravity, the inner cavity is divided into small chambers, connecting chambers, and large chambers distributed from top to bottom; the small chambers have the smallest cross-sectional area perpendicular to the direction of gravity, while the large chambers have the largest cross-sectional area perpendicular to the direction of gravity.

[0036] It should be understood that when the stirring pot 3 is working, the liquid level of the glass in the inner cavity should be located at the small chamber, that is, the liquid level of the glass in the furnace 1 should also be located at the small chamber. In this way, when the glass is stirred in the inner cavity, the amount of glass evaporation is minimized. At the same time, the large chamber can ensure that the amount of glass being stirred is not too small, thus improving work efficiency.

[0037] Furthermore, at this time, the axial direction of the stirring shaft 31 can be the same as the direction of gravity, and the large chamber and the small chamber are cylindrical. The stirring shaft 31 is coaxially arranged with the cylindrical small chamber and the cylindrical large chamber. In this way, when the glass liquid is in the inner cavity, the stirring range of the stirring shaft 31 is cylindrical, and the large chamber and the small chamber are also cylindrical, resulting in a better stirring effect.

[0038] The stirring blades can be installed only in the part of the stirring shaft 31 located in the large chamber. When stirring, the stirring shaft 31 causes less disturbance to the glass liquid in the small chamber, further controlling the evaporation area of ​​the glass liquid and thus reducing the evaporation of the glass liquid. In addition, the glass liquid in the small chamber is only a small part, and slight disturbance can ensure the uniformity of the glass liquid.

[0039] It should be noted that, in the direction of gravity, the large chamber, the connecting chamber, and the small chamber all have a certain height, and the ratio of the height of the large chamber to the height of the small chamber is 'a', where a > 0. When the value of 'a' is larger, the stirring pot 3 can simultaneously stir a larger amount of molten glass, resulting in higher working efficiency, but it is more difficult to control the molten glass level in the inner cavity to be in the small chamber. When the value of 'a' is smaller, the stirring pot 3 can simultaneously stir a larger amount of molten glass, resulting in lower working efficiency, but it is easier to control the molten glass level in the inner cavity to be in the small chamber. This application provides a preferred embodiment where, when a = 5, the stirring pot 3 can simultaneously stir a larger amount of molten glass, and it is easier to control the molten glass level in the inner cavity to be in the small chamber, making operation more convenient.

[0040] Specifically, the height of the molten glass in the inner cavity can be controlled by controlling the height of the molten glass in the furnace 1. The height of the molten glass in the furnace 1 can be controlled by controlling the feeding rate into the furnace 1. When the feeding rate is increased, the height of the molten glass in the furnace 1 rises; when the feeding rate is decreased, the height of the molten glass in the furnace 1 falls.

[0041] In addition, for connecting chambers, which connect large cylindrical chambers and small cylindrical chambers, the connecting chambers can be frustum-shaped.

[0042] It should be noted that, viewed in a cross-section parallel to the direction of gravity, the frustum-shaped connecting chamber is an isosceles trapezoid. The angle between the lower base and the leg of the isosceles trapezoid is b, and 0° < b < 90°. Assuming a = 5, and that the positions and volume of the small and large chambers remain unchanged, when adjusting the large and connecting chambers, a smaller value of b results in a smaller slope at the connection point. This leads to a greater difference in diameter between the small and large chambers, increasing the amount of molten glass stirred within the chamber and thus improving working efficiency. However, the more likely dead zones are to appear during stirring, the worse the stirring effect becomes. When the value of b is larger, the slope at the connection between the small chamber and the large chamber is greater. At this time, the diameter difference between the small chamber and the large chamber is smaller, the amount of glass liquid stirred in the inner chamber is reduced, the working efficiency is lower, but the stirring is less likely to have dead zones, and the stirring effect is better. This application provides a preferred embodiment in which, when b = 45°, the stirring pot 3 can stir a larger amount of glass liquid at the same time, and dead zones are less likely to appear at the connection of the chambers, resulting in a better stirring effect and more convenient use.

[0043] Reference Figure 1In an exemplary embodiment, the connection area between the connecting pipe 2 and the mixing pot 3 is located in the large chamber near the small chamber, and the connection area between the feeding pipe 4 and the mixing pot 3 is located in the large chamber away from the small chamber.

[0044] Specifically, when the connection area between the connecting pipe 2 and the mixing pot 3 is located in the large chamber near the small chamber, the molten glass enters the inner cavity and first falls into the large chamber, then continues to accumulate until the surface of the molten glass in the inner cavity is located in the small chamber, at which point stirring can be carried out; when the connection area between the feeding pipe 4 and the mixing pot 3 is located in the large chamber far from the small chamber, the molten glass in the inner cavity flows more easily into the feeding pipe 4 and the discharge pipe 5.

[0045] Furthermore, the end of the connecting pipe 2 near the mixing pot 3 can be tilted downwards. At this time, the angle between the axis of the connecting pipe 2 and the horizontal direction is c, 0°≤c≤15°, and c=5° can be taken. At this time, the rate at which the glass liquid flows from the connecting pipe 2 into the mixing pot 3 increases, further improving the working efficiency.

[0046] It should be understood that the feed pipe 4 can also adopt the above-mentioned inclined design of the connecting pipe 2 to facilitate the flow of molten glass in the feed pipe 4, which will not be described in detail here.

[0047] Reference Figure 1 In an exemplary embodiment, a through hole 11 is provided on the side wall of the kiln 1, and one end of the connecting pipe 2 is inserted into the through hole 11; the platinum feeding system may also include a flange 6, which is sleeved on the outer periphery of the connecting pipe 2 and located outside the kiln 1, and the flange 6 covers the gap between the connecting pipe 2 and the through hole 11.

[0048] Specifically, the through hole 11 can be set on the wall of the material channel area of ​​the furnace 1. The connecting pipe 2 is inserted into the through hole 11 to connect the material channel area of ​​the furnace 1, and the molten glass can flow from the material channel area of ​​the furnace 1 into the connecting pipe 2. After the flange 6 covers the gap between the connecting pipe 2 and the through hole 11, the molten glass in the furnace 1 will be blocked by the flange 6 when it flows to the gap between the through hole 11 and the connecting pipe 2, thus solving the problem of molten glass flowing out from the gap between the through hole 11 and the connecting pipe 2 and causing waste.

[0049] Furthermore, flange 6 can be a flange 6 with a cooling structure, for example, a flow channel is opened in flange 6, and coolant passes through the flow channel to cool flange 6 to prevent flange 6 from deforming due to heat.

[0050] Reference Figure 1 In an exemplary embodiment, the side wall of the mixing vessel 3 has a sandwich space; the platinum feeding system may further include a radiant heating component 7, which is disposed within the sandwich space; wherein the radiant heating component 7 is used to uniformly heat the mixing vessel 3.

[0051] Specifically, the radiant heating assembly 7 may include multiple heating elements arranged around the periphery of the inner cavity to heat the molten glass inside the inner cavity. This can also be understood as the heating elements heating the stirring pot 3.

[0052] The heating element can be a graphite rod, a tungsten rod, etc.

[0053] Reference Figure 1 In an exemplary embodiment, the platinum feeding system may further include two first electrode plates 8, which are spaced apart on the outer periphery of the connecting pipe 2; wherein the two first electrode plates 8 are used to heat the connecting pipe 2; the platinum feeding system may further include three second electrode plates 9, two of which are respectively disposed on the outer periphery of the feeding pipe 4 and the discharge pipe 5, and the other second electrode plate 9 is disposed at the connection between the feeding pipe 4 and the discharge pipe 5; wherein the two second electrode plates 9 closer to the feeding pipe 4 are used to heat the feeding pipe 4, and the two second electrode plates 9 closer to the discharge pipe 5 are used to heat the discharge pipe 5.

[0054] Specifically, the two first electrode plates 8 and the connecting tube 2 form a heating circuit to heat the connecting tube 2, thereby controlling the temperature of the connecting tube 2 and thus the temperature of the molten glass inside the connecting tube 2.

[0055] It should be understood that the platinum connecting tube 2 can be understood as a resistor, and the two first electrode plates 8 can be understood as resistors connected to the two ends of an external power supply, thus forming a heating circuit. At this time, adjusting the power of the heating circuit can control the temperature of the glass melt in the connecting tube 2. The heating method of the feed tube 4 and the discharge tube 5 is the same as that of the connecting tube 2, and will not be described in detail here.

[0056] Furthermore, thermocouples for displaying temperature are welded to the outer periphery of connecting pipe 2, mixing pot 3, feeding pipe 4, and discharging pipe 5 to facilitate accurate temperature control. There are many technical aspects related to how the thermocouples display temperature, which will not be explained in detail here.

[0057] refer to Figure 2 Based on the above embodiments, this application also provides a control method for a platinum feeding system. This method can be executed by a controller, which is electrically connected to each of the above-mentioned heating circuits and the radiant heating group. The method may include the following steps:

[0058] S100. In the direction of gravity, keep the liquid glass level in the furnace 1 above the inner cavity of the furnace 1.

[0059] S200: Heat the connecting pipe 2 to the first preset temperature;

[0060] S300. Heat the mixing bowl 3 to the second preset temperature;

[0061] S400. After the glass melt level in the stirring pot 3 is level with the glass melt level in the furnace 1, the glass melt inside is stirred by the stirring pot 3.

[0062] S500, Heat the feed pipe 4 to the third preset temperature;

[0063] S600, heat the discharge pipe 5 to the fourth preset temperature.

[0064] In step S100, the liquid level of the molten glass in the furnace 1 is kept above the inner cavity of the furnace 1, that is, the liquid level of the molten glass in the furnace 1 is kept in the small chamber of the furnace 1. It should be understood that the liquid level of the molten glass in the furnace 1 should always be in the small chamber, so as to reduce the evaporation of the molten glass during stirring, improve the uniformity of the molten glass, and reduce the streaks generated during glass forming. The liquid level of the molten glass in the furnace 1 can be adjusted by adjusting the feeding rate in the furnace 1, that is, adjusting the liquid level of the molten glass in the inner cavity.

[0065] In step S200, the connecting tube 2 is heated to a first preset temperature. After the connecting tube 2 is heated, the molten glass can flow into the connecting tube 2. It should be understood that the connecting tube 2 can be heated by adjusting the power of the heating circuit corresponding to the connecting tube 2.

[0066] In step S300, the stirring pot 3 is heated to a second preset temperature. After the stirring pot 3 is heated, the molten glass can flow into the inner cavity of the stirring pot 3. It should be understood that the stirring pot 3 can be heated by adjusting the power of the radiant heating component 7, that is, the temperature of the molten glass in the stirring pot 3 can be adjusted.

[0067] The glass melt process temperature in the stirring tank 3 is set to correspond to the temperature when the glass melt viscosity is 100-1000 Pa·s, preferably 200-600 Pa·s. This temperature serves as the control temperature for the glass melt in the stirring tank 3, maintaining a stable temperature with fluctuations within 0-10℃. Additionally, the glass melt process temperature in the connecting pipe 2 is set to be 0-100℃ higher than the glass melt temperature in the stirring tank 3, preferably 0-30℃ higher. In the preferred embodiment provided in this application, the first preset temperature is between 1330-1380℃, and the second preset temperature is between 1300-1350℃.

[0068] In step S400, once the glass melt level in the stirring pot 3 is level with the glass melt level in the furnace 1, that is, when the glass melt level in the inner cavity is at the small chamber, the glass melt in the inner cavity can be stirred.

[0069] In step S500, the feed pipe 4 is heated to a third preset temperature. After the feed pipe 4 is heated, the molten glass can flow from the stirring pot 3 into the feed pipe 4. It should be understood that the feed pipe 4 can be heated by adjusting the power of the heating circuit corresponding to the feed pipe 4.

[0070] The glass melt process temperature of the feed pipe 4 is set to be lower than the glass melt temperature in the mixing pot 3 and higher than the temperature of the discharge pipe 5 by 0-100°C, preferably 0-30°C. In the preferred embodiment provided in this application, the third preset temperature is between 1200-1300°C.

[0071] Furthermore, the flow rate of molten glass in the feed pipe 4 can be adjusted by adjusting the temperature and diameter of the feed pipe 4.

[0072] In step S600, the discharge pipe 5 is heated to the fourth preset temperature. After the discharge pipe 5 is heated, the molten glass can flow from the feed pipe 4 into the discharge pipe 5.

[0073] The glass melt process temperature of the discharge pipe 5 is set to the discharge temperature required for forming the tube. It is better to control the temperature fluctuation range within 0-2℃. In the preferred embodiment provided in this application, the fourth preset temperature is between 1200-1250℃.

[0074] It should be understood that the feed pipe 4 is located between the mixing pot 3 and the discharge pipe 5, which can uniformly cool the glass liquid flowing out of the mixing pot 3 to the third preset temperature. When the glass liquid enters the discharge pipe 5, it is further uniformly cooled to the fourth preset temperature to meet the glass liquid discharge temperature requirements.

[0075] Furthermore, the discharge port cross-section of the discharge pipe 5 is designed to be circular or elliptical, preferably elliptical, and the major axis of the ellipse is at an angle of 0°-10°, preferably 2°-5°, to the axial direction of the swivel cylinder used for Dana process molding.

[0076] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A platinum feeding system, comprising a kiln (1), characterized in that, The platinum feeding system includes: Connecting pipe (2), one end of which is connected to the kiln (1); A stirring pot (3) has an inner cavity and is connected to the connecting pipe (2). The stirring pot (3) is used to stir the glass liquid flowing in from the connecting pipe (2). In the direction of gravity, the cross-sectional area of ​​the inner cavity perpendicular to the direction of gravity decreases from bottom to top. The feed pipe (4) is connected at one end to the mixing pot (3); The discharge pipe (5) is connected at one end to the end of the feed pipe (4) that is away from the mixing pot (3); In the direction of gravity, the inner cavity of the stirring pot (3) is divided into a small chamber, a connecting chamber and a large chamber connected in sequence. The small chamber is located above the large chamber, and the cross-sectional area of ​​the small chamber perpendicular to the direction of gravity is the smallest. When the stirring pot (3) is working, the height of the glass liquid level in the inner cavity of the stirring pot (3) is located in the small chamber. The connection area between the connecting pipe (2) and the mixing pot (3) is located in the large chamber near the small chamber, and the connection area between the feeding pipe (4) and the mixing pot (3) is located in the large chamber away from the small chamber.

2. The platinum feeding system as described in claim 1, characterized in that, The side wall of the kiln (1) is provided with a through hole (11), and one end of the connecting pipe (2) is inserted into the through hole (11); the platinum feeding system also includes: A flange (6) is fitted around the outer periphery of the connecting pipe (2) and located outside the kiln (1). The flange (6) covers the gap between the connecting pipe (2) and the through hole (11).

3. The platinum feeding system as described in claim 1, characterized in that, The side wall of the mixing vessel (3) has a sandwich space; the platinum feeding system further includes: A radiant heating component (7) is disposed within the interlayer space; The radiant heating component (7) is used to uniformly heat the stirring pot (3).

4. The platinum feeding system as described in claim 1, characterized in that, The outer periphery of the connecting pipe (2), mixing pot (3), feeding pipe (4) and discharging pipe (5) are all equipped with refractory materials for heat preservation.

5. The platinum feeding system as described in claim 1, characterized in that, The platinum feeding system also includes: Two first electrode plates (8) are spaced apart on the outer periphery of the connecting tube (2); The two first electrode plates (8) are used to heat the connecting tube (2).

6. The platinum feeding system as described in claim 1, characterized in that, The platinum feeding system also includes: Three second electrode plates (9) are provided, two of which are respectively disposed on the outer periphery of the feed pipe (4) and the discharge pipe (5), and the other second electrode plate (9) is disposed at the connection between the feed pipe (4) and the discharge pipe (5); Among them, the two second electrode plates (9) near the feed pipe (4) are used to heat the feed pipe (4), and the two second electrode plates (9) near the discharge pipe (5) are used to heat the discharge pipe (5).

7. A control method for a platinum feeding system, characterized in that, The platinum feeding system control method, applicable to any one of claims 1-6, comprises: In the direction of gravity, keep the liquid glass level in the furnace (1) above the inner cavity of the furnace (1); Heat the connecting pipe (2) to a first preset temperature; Heat the mixing pot (3) to a second preset temperature; The glass liquid level in the stirring pot (3) is level with the glass liquid level in the kiln (1) and both are located in the small chamber. The stirring pot (3) stirs the glass liquid inside it. Heat the feed pipe (4) to a third preset temperature; The discharge pipe (5) is heated to the fourth preset temperature.

8. The control method for the platinum feeding system as described in claim 7, characterized in that, The first preset temperature is between 1330-1380℃, the second preset temperature is between 1300-1350℃, the third preset temperature is between 1200-1300℃, and the fourth preset temperature is between 1200-1250℃.

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