CN117585891B

CN117585891B - Bubble defect adjustment control method and system for bottom of tin bath

Info

Publication number: CN117585891B
Application number: CN202311834813.6A
Authority: CN
Inventors: 章榕; 许涛; 武金发; 王宁
Original assignee: Qinhuangdao North Glass Co ltd
Current assignee: Qinhuangdao North Glass Co ltd
Priority date: 2023-12-28
Filing date: 2023-12-28
Publication date: 2024-05-17
Anticipated expiration: 2043-12-28
Also published as: CN117585891A

Abstract

The invention provides a method and a system for adjusting and controlling bubble defects at the bottom of a tin bath. The method for adjusting and controlling the bubble defects at the bottom of the tin bath comprises the following steps: after the glass is fully flattened in the tin bath, starting a vacuum pump to pump gas in the tin bath to generate a negative pressure initial environment, and controlling the negative pressure initial environment to keep the first negative pressure for a long time; after the first negative pressure duration, setting a second target air pressure and a second negative pressure duration in a defoaming stage by utilizing an air pressure change parameter in the tin bath in the process of reaching the negative pressure initial environment of the tin bath and maintaining the first negative pressure duration and an air bubble parameter in the bottom of the tin bath after the first negative pressure duration; and after the second negative pressure duration is over, acquiring the bubble parameters of the bottom of the tin bath after the second negative pressure duration by utilizing ultrasonic detection, judging whether the bubble parameters of the bottom of the tin bath after the second negative pressure duration meet the bubble elimination requirement, and carrying out bubble elimination optimization of the bottom of the tin bath according to the judgment result. The system comprises modules corresponding to the method steps.

Description

Bubble defect adjustment control method and system for bottom of tin bath

Technical Field

The invention provides a method and a system for adjusting and controlling bubble defects at the bottom of a tin bath, and belongs to the technical field of industrial control.

Background

The float glass is formed in a tin bath, and molten glass in a melting furnace is fed into an annealing furnace through a transition roller table under the action of external force of a main transmission and edge drawing machine at a certain temperature system to form glass with certain width and thickness.

The tin bath in the float process uses molten tin as a float medium and a mixed gas of nitrogen and hydrogen as a protective gas. In the relatively closed environment of the tin bath, a number of complex chemical reactions occur, some of which bring about a number of glass defects, which affect the quality of the product.

In the annual operation of the bottom brick of the molten tin bath, because the glass contains about 13.5% of sodium, when the molten glass flows into the molten tin bath, the molten glass floats on the molten tin bath surface and can be subjected to ion exchange, sodium ions in the glass can enter the molten tin bath, then the sodium ions in the molten tin bath can permeate into the surface of the silica brick at the bottom of the molten tin bath after accumulating to a certain extent, and the molten tin bath can generally permeate into 7 inches at the deepest, and the sodium ions can react with the original silicon and aluminum of the brick to form nepheline and generate volume expansion, so that the defects of floating matters, bubbles and the like are caused by corrosion of the bottom brick.

The graphite baffle ridge is a device which is embedded at the bottom of a molten metal tin bath in the forming process of float glass, is immersed in the molten metal tin bath in normal production and is covered by a formed glass plate and is used for adjusting the convection of the tin bath and improving the surface quality of the float glass, but a large amount of lower surface bubbles can be generated due to the temperature change of the tin bath and the convection enhancement in the production process in the future along with oxidation of the graphite baffle ridge or the reasons that the quality of a bath bottom brick does not reach the design requirements, the installation and baking processes and the like, so that the quality of the glass is seriously affected, the service life of the tin bath is obviously prolonged, and the tin bath is stopped for being refurbished as the service life is not reached, thereby causing great economic loss.

The prior art solution is usually to open blind holes on the bottom bricks of the groove, but the operation causes the erosion resistance of the bottom bricks of the groove to be weakened and Yi Xia petrochemical, thereby affecting the quality of the product; and the method can only be installed before production, and the subsequent operation is relatively difficult.

Disclosure of Invention

The invention provides a method and a system for adjusting and controlling bubble defects at the bottom of a tin bath, which are used for solving the problem that the corrosion resistance of a bath bottom brick is weakened due to the fact that the bottom of the tin bath is required to be perforated in the prior art, and the adopted technical scheme is as follows:

A method for controlling and adjusting bubble defects at the bottom of a tin bath, comprising:

after the glass is fully flattened in the tin bath, starting a vacuum pump to pump gas in the tin bath to generate a negative pressure initial environment, and controlling the negative pressure initial environment to keep the first negative pressure for a long time;

After the first negative pressure duration, setting a second target air pressure and a second negative pressure duration in a defoaming stage by utilizing an air pressure change parameter in the tin bath in the process of reaching the negative pressure initial environment of the tin bath and maintaining the first negative pressure duration and an air bubble parameter in the bottom of the tin bath after the first negative pressure duration;

and after the second negative pressure duration is over, acquiring the bubble parameters of the bottom of the tin bath after the second negative pressure duration by utilizing ultrasonic detection, judging whether the bubble parameters of the bottom of the tin bath after the second negative pressure duration meet the bubble elimination requirement, and carrying out bubble elimination optimization of the bottom of the tin bath according to the judgment result.

Further, starting the vacuum pump to pump the gas in the tin bath to generate a negative pressure initial environment, and controlling the negative pressure initial environment to keep the first negative pressure duration, including:

After the glass is fully flattened in the tin bath, collecting the glass temperature and the temperature of the inner cavity part of the tin bath after the glass is fully flattened as first temperature information;

the method comprises the steps of utilizing ultrasonic detection to obtain bubble parameters of the bottom of a tin bath after glass is fully flattened in the tin bath as first bubble parameter information;

Setting a first target air pressure corresponding to a negative pressure initial environment according to the glass temperature and the temperature of the inner cavity part of the tin bath;

Starting a vacuum pump to extract gas in the tin bath so that the gas pressure in the tin bath reaches the first target gas pressure (namely negative pressure initial environment), and simultaneously monitoring the change parameters of the gas pressure in the tin bath from the moment of starting the vacuum pump to the negative pressure stage when the tin bath reaches the negative pressure initial environment and the change parameters of the gas pressure in the tin bath in the first negative pressure duration maintaining process in real time;

After the air pressure in the tin bath reaches the first target air pressure, ultrasonic detection is utilized to obtain the bubble parameters of the bottom of the tin bath of the glass;

When the air pressure in the tin bath reaches the first target air pressure, collecting the glass temperature and the temperature of the inner cavity part of the tin bath as second temperature information;

And setting a first negative pressure duration by using the second temperature information, and keeping the negative pressure initial environment until the first negative pressure duration is over.

Further, setting a first target air pressure corresponding to a negative pressure initial environment according to the glass temperature and the temperature of the inner cavity part of the tin bath, including:

Acquiring a temperature difference between the glass temperature and the inner cavity part of the tin bath according to the temperature between the glass temperature and the inner cavity part of the tin bath;

Determining a current glass viscosity from the glass temperature; wherein the glass viscosity is obtained by the following formula:

Wherein η represents the current glass viscosity; t ₀₁ represents the heating temperature at which the glass melts; t ₀₂ represents the temperature after melting the glass; t ₀₀ represents the temperature in the tin bath; ρ represents the density of the glass;

And setting a first target air pressure according to the temperature difference between the glass temperature and the inner cavity part of the tin bath and the current glass viscosity.

Further, setting a first target gas pressure based on the temperature difference between the glass temperature and the portion of the chamber in the tin bath and the current glass viscosity, comprising:

Extracting and utilizing ultrasonic detection to obtain bubble parameters of the bottom of the tin bath after the glass is fully flattened in the tin bath;

Extracting the glass viscosity of the current glass;

Setting a first air pressure coefficient by utilizing the bubble parameters of the bottom of the tin bath after the glass is fully flattened in the tin bath and the glass viscosity of the current glass; the first air pressure coefficient is obtained through the following formula:

wherein λ ₀₁ represents the first air pressure coefficient; r _p represents the average radius of the bubbles; r _max represents the maximum radius of the bubble; η represents the current glass viscosity; b represents the maximum allowable bubble concentration in the current production requirement of the glass; v _q represents the volume occupied by bubbles at the bottom of the tin bath after the glass is fully flattened in the tin bath; v _b represents the volume of the glass after the glass is fully flattened inside the tin bath; n represents the number of bubbles; x _i represents the X-axis coordinate corresponding to the position of the ith bubble; x _p represents the X-axis coordinate average of the bubble position;

setting a first target air pressure by utilizing the first air pressure coefficient and combining the volume of the current liquid glass and the bubble parameters of the bottom of the tin bath after the glass is fully flattened in the tin bath, wherein the first target air pressure is obtained through the following formula:

P₀₁＝P₀-ΔP₀₁

Wherein P ₀₁ represents a first target air pressure; Δp ₀₁ represents the first negative pressure absolute value; lambda ₀₁ represents a first air pressure coefficient; lambda ₀₂ represents the second air pressure coefficient; m represents the number of moles of gas in the tin bath; c represents the gas constant of the gas in the tin bath; t ₀₂ represents the temperature after melting the glass; t ₀₀ represents the temperature in the tin bath; v represents the volume of the inner cavity of the tin bath.

Further, setting a first negative pressure duration using the second temperature information includes:

The glass temperature and the temperature of the inner cavity part of the tin bath after the air pressure in the tin bath reaches the first target air pressure are adjusted;

Acquiring a temperature difference between the glass temperature and the inner cavity part of the tin bath after the air pressure in the tin bath reaches the first target air pressure according to the glass temperature and the inner cavity part of the tin bath after the air pressure in the tin bath reaches the first target air pressure;

and setting a first negative pressure duration by utilizing the temperature difference between the glass temperature and the inner cavity part of the tin bath after the air pressure in the tin bath reaches the first target air pressure and the temperature difference between the glass temperature and the inner cavity part of the tin bath after the glass is fully flattened in the tin bath.

Further, setting a first negative pressure duration by using a temperature difference between the glass temperature and a portion of the interior of the tin bath after the air pressure in the tin bath reaches the first target air pressure and a temperature difference between the glass temperature and a portion of the interior of the tin bath after the glass is sufficiently flattened inside the tin bath, comprising:

Extracting a difference between the glass temperature after the glass is fully flattened in the tin bath and the temperature of the inner cavity part of the tin bath;

Extracting a temperature difference between the glass temperature and a part of the inner cavity of the tin bath after the air pressure in the tin bath reaches the first target air pressure;

Extracting bubble parameters at the bottom of the tin bath after the air pressure in the tin bath reaches the first target air pressure;

And setting a first negative pressure duration by utilizing a temperature difference between the glass temperature and the inner cavity part of the tin bath after the air pressure in the tin bath reaches the first target air pressure and a temperature difference between the glass temperature and the inner cavity part of the tin bath after the glass is fully flattened in the tin bath, and combining a bubble parameter of the bottom of the tin bath after the air pressure in the tin bath reaches the first target air pressure, wherein the first negative pressure duration comprises:

Wherein T _s01 represents a first negative pressure duration; t _c01 represents the difference between the glass temperature after the glass is sufficiently flattened inside the tin bath and the temperature of the inner cavity portion of the tin bath; t _c02 represents the difference between the glass temperature and the temperature of the inner cavity portion of the tin bath after the air pressure in the tin bath reaches the first target air pressure; b _q01 represents the bubble concentration at the bottom of the tin bath after the air pressure in the tin bath reaches the first target air pressure; b _q00 represents the bubble concentration at the bottom of the tin bath after the glass is fully flattened in the tin bath; t _s0 represents a preset negative pressure duration reference value.

Further, after the first negative pressure duration, setting a second target air pressure and a second negative pressure duration of the defoaming stage by using an air pressure variation parameter inside the tin bath in the process of reaching the negative pressure initial environment of the tin bath and maintaining the first negative pressure duration and an air bubble parameter at the bottom of the tin bath after the first negative pressure duration, including:

after the first negative pressure duration, the internal air pressure change parameter of the tin bath in the negative pressure stage from the starting time of the vacuum pump to the time when the tin bath reaches the negative pressure initial environment is called;

Obtaining a vacuum pump movement characteristic factor by utilizing the change parameter of the internal air pressure of the tin bath in the period from the starting time of the vacuum pump to the negative pressure stage when the tin bath reaches the negative pressure initial environment and the change parameter of the internal air pressure of the tin bath in the first negative pressure duration maintaining process; the motion characteristic factor of the vacuum pump is obtained through the following formula:

Wherein E _x represents a vacuum pump motion characteristic factor; e ₀₁ and E ₀₂ represent a first parameter and a second parameter, respectively; k represents the number of unit time contained in the period from the starting time of the vacuum pump to the negative pressure stage when the tin bath reaches the negative pressure initial environment, and the unit time is 1s; p _01i represents the internal air pressure value of the tin bath in the ith unit time; p ₀₁ represents a first target air pressure; q _i represents the power of the vacuum pump at the ith unit time; q _e represents the rated power of the vacuum pump;

acquiring current bubble parameters at the bottom of the tin bath by utilizing ultrasonic detection as second bubble parameter information;

the method comprises the steps of calling first bubble parameter information, wherein the first bubble parameter information is a bubble parameter of the bottom of a tin bath after glass is fully flattened in the tin bath;

Acquiring a negative pressure bubble change factor by utilizing the first bubble parameter information and the second bubble parameter information; wherein, the negative pressure bubble change factor is obtained by the following formula:

Wherein E _y represents a negative pressure bubble variation factor; b _q01 represents the bubble concentration at the bottom of the tin bath after the air pressure in the tin bath reaches the first target air pressure; b _q00 represents the bubble concentration at the bottom of the tin bath after the glass is fully flattened in the tin bath; b _q02 represents the bubble concentration at the bottom of the tin bath after the first negative pressure period;

And setting a second target air pressure and a second negative pressure duration by using the vacuum pump movement characteristic factor and the negative pressure bubble change factor.

Further, the setting of the second target air pressure and the second negative pressure duration by using the vacuum pump movement characteristic factor and the air bubble change factor includes:

Collecting a vacuum pump motion characteristic factor and a negative pressure bubble change factor;

setting a second target air pressure and a second negative pressure duration by using the vacuum pump movement characteristic factor and the negative pressure bubble change factor, wherein the second target air pressure and the second negative pressure duration are obtained by the following formula:

P₀₂＝P₀-ΔP₀₂

ΔP₀₂＝(1+E_y/E_x)·ΔP₀₁

Wherein P ₀₂ represents the second target air pressure; Δp ₀₂ represents the second negative pressure absolute value; Δp ₀₁ represents the first negative pressure absolute value; e _x represents a vacuum pump motion characteristic factor; e _y represents a negative pressure bubble variation factor;

T_s02＝(1+E_y/E_x)·T_s01

wherein T _s02 represents a second negative pressure duration; t _s01 denotes a first negative pressure period.

Further, after the second negative pressure duration is over, ultrasonic detection is used to obtain the bubble parameters of the bottom of the tin bath after the second negative pressure duration, and whether the bubble parameters of the bottom of the tin bath after the second negative pressure duration meet the bubble elimination requirement is judged, and the bubble elimination optimization of the bottom of the tin bath is performed according to the judgment result, including:

After the second negative pressure duration is over, ultrasonic detection is utilized to obtain the bubble parameters of the bottom of the tin bath after the second negative pressure duration;

comparing the bubble parameters of the bottom of the tin bath after the second negative pressure duration with a preset bubble parameter threshold value to obtain a comparison result;

When the comparison result shows that the bubble parameters of the bottom of the tin bath after the second negative pressure duration do not meet the preset bubble parameter threshold value requirements, the bubble parameters of the bottom of the tin bath after the second negative pressure duration are called;

The method comprises the steps of calling first bubble parameter information and second bubble parameter information, and obtaining first parameter change data through the first bubble parameter information and the second bubble parameter information;

Comparing the bubble parameters of the bottom of the tin bath after the second negative pressure duration with the bubble parameters of the bottom of the tin bath after the first negative pressure duration to obtain second parameter variation data;

Acquiring a parameter change coefficient by using the first parameter change data and the second parameter change data parameters; the parameter change coefficient is obtained through the following formula:

Wherein B _λ represents a parameter variation coefficient; b _q00 represents the bubble concentration at the bottom of the tin bath after the glass is fully flattened in the tin bath; b _q02 represents the bubble concentration at the bottom of the tin bath after the first negative pressure period; b _q03 represents the bubble concentration at the bottom of the tin bath after the second negative pressure period; b _m represents the bubble concentration at the bottom of the tin bath corresponding to the bubble elimination requirement;

the internal air pressure change parameters of the tin bath in the defoaming stage are called;

Acquiring a negative pressure fluctuation factor corresponding to the defoaming stage by utilizing the internal air pressure change parameter of the tin bath in the defoaming stage; wherein, the negative pressure fluctuation factor is obtained by the following formula:

wherein E _b represents a negative pressure fluctuation factor; b ₀ denotes a preset reference coefficient value; r represents the number of unit time included in the defoaming stage; p _02i represents the internal air pressure value of the tin bath in the ith unit time of the defoaming stage; p ₀₂ represents a second target air pressure; η _c represents the glass viscosity after the second negative pressure period;

And acquiring a third target air pressure and a third negative pressure duration by using the negative pressure fluctuation factor, wherein the third target air pressure and the third negative pressure duration are acquired by the following formula:

P₀₃＝P₀-ΔP₀₃

ΔP₀₂＝(1+E_b)·ΔP₀₂

Wherein P ₀₃ represents a third target air pressure; Δp ₀₃ represents the third negative pressure absolute value; Δp ₀₂ represents the second negative pressure absolute value;

T_s03＝(1-E_b)·T_s02

Wherein T _s03 represents a third negative pressure duration; t _s02 denotes a second negative pressure period.

And performing negative pressure operation according to the third target air pressure and the third negative pressure duration to complete the elimination and optimization of the bubbles at the bottom of the tin bath.

A tin bath bottom bubble defect adjustment control system, the tin bath bottom bubble defect adjustment control system comprising:

The initial negative pressure control module is used for starting the vacuum pump to extract the gas in the tin bath to generate a negative pressure initial environment after the glass is fully flattened in the tin bath, and controlling the negative pressure initial environment to keep the first negative pressure duration;

The defoaming negative pressure control module is used for setting second target air pressure and second negative pressure duration of a defoaming stage by utilizing the air pressure change parameters in the tin bath and the air bubble parameters at the bottom of the tin bath after the first negative pressure duration in the process that the tin bath reaches a negative pressure initial environment and the first negative pressure duration is maintained;

And the optimized negative pressure control module is used for acquiring the bubble parameters of the bottom of the tin bath after the second negative pressure duration by utilizing ultrasonic detection after the second negative pressure duration is over, judging whether the bubble parameters of the bottom of the tin bath after the second negative pressure duration meet the bubble elimination requirement or not, and carrying out bubble elimination optimization of the bottom of the tin bath according to the judgment result.

The invention has the beneficial effects that:

According to the method and the system for controlling the bubble defect at the bottom of the tin bath, provided by the invention, the negative pressure generated by the vacuum pump is used for removing the gas contained in the tin bath structure and the gas generated by the physicochemical reaction through the pressure difference, so that the influence of the bubbles at the openings of the lower table on the production quality of float glass is solved; because no blind hole is needed to be formed on the bottom brick of the tank, the purpose of eliminating the defect of the lower surface bubble generated in the float glass forming process is achieved on the basis that the use safety performance of the tin tank is not affected, the safety performance is higher, the defoaming efficiency is better, the operation is simple and quick, and the float glass forming device can be installed and detached at any time under the condition that the production is not affected. Meanwhile, the negative pressure value and the negative pressure holding time length of each stage of the tin bath bottom bubble defect adjustment control method and system can effectively improve the matching property of the negative pressure value and the negative pressure holding time length of each stage and the bubble condition of glass, further improve the setting accuracy of the negative pressure value and the negative pressure holding time length of each stage and improve the defoaming efficiency.

Drawings

FIG. 1 is a flow chart of the method of the present invention;

fig. 2 is a system block diagram of the system of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.

The embodiment of the invention provides a method for adjusting and controlling bubble defects at the bottom of a tin bath, which is shown in figure 1 and comprises the following steps:

s1, after glass is fully flattened in a tin bath, starting a vacuum pump to extract gas in the tin bath to generate a negative pressure initial environment, and controlling the negative pressure initial environment to keep a first negative pressure duration;

s2, after the first negative pressure duration, setting a second target air pressure and a second negative pressure duration in a defoaming stage by utilizing an air pressure change parameter in the tin bath in the process of reaching the negative pressure initial environment of the tin bath and the first negative pressure duration maintaining process and a bubble parameter in the bottom of the tin bath after the first negative pressure duration;

S3, after the second negative pressure duration is finished, ultrasonic detection is utilized to obtain the bubble parameters of the bottom of the tin bath after the second negative pressure duration, whether the bubble parameters of the bottom of the tin bath after the second negative pressure duration meet the bubble elimination requirement is judged, and bubble elimination optimization of the bottom of the tin bath is carried out according to the judgment result.

The working principle of the technical scheme is as follows: after the glass is fully flattened in the tin bath, a vacuum pump is started to pump the gas in the tin bath so as to generate a negative pressure initial environment. And controlling the negative pressure initial environment to keep the negative pressure for a first negative pressure duration. At this stage, the negative pressure environment helps to exhaust the gas in the tin bath, creating favorable conditions for subsequent bubble elimination.

After the first negative pressure duration, setting a second target air pressure and a second negative pressure duration of the defoaming stage by using an air pressure change parameter in the tin bath and a bubble parameter (namely a bath bottom bubble parameter) after the first negative pressure duration. This stage adjusts and controls the subsequent air pressure and duration based on the air bubble change conditions and air pressure changes inside the tin bath.

And after the second negative pressure duration is over, acquiring bubble parameters of the bottom of the tin bath by utilizing ultrasonic detection. By comparing these parameters with the bubble elimination requirement, it is judged whether the bubble elimination requirement is satisfied. And (5) according to the judgment result, carrying out optimization of eliminating bubbles at the bottom of the tin bath. The size, the number and the distribution of bubbles can be accurately detected by ultrasonic detection, and a basis is provided for optimization.

The technical scheme has the effects that: according to the method for adjusting and controlling the bubble defects at the bottom of the tin bath, the negative pressure generated by the vacuum pump is used for removing the gas contained in the tin bath structure and the gas generated by the physicochemical reaction through the pressure difference, so that the influence of the bubbles at the openings of the lower table on the production quality of float glass is solved; because no blind hole is needed to be formed on the bottom brick of the tank, the purpose of eliminating the defect of the lower surface bubble generated in the float glass forming process is achieved on the basis that the use safety performance of the tin tank is not affected, the safety performance is higher, the defoaming efficiency is better, the operation is simple and quick, and the float glass forming device can be installed and detached at any time under the condition that the production is not affected. Meanwhile, by means of the negative pressure value and the negative pressure maintaining duration of each stage of the tin bath bottom bubble defect adjustment control method, the matching performance of the negative pressure value and the negative pressure maintaining duration of each stage and the bubble condition of glass can be effectively improved, the setting accuracy of the negative pressure value and the negative pressure maintaining duration of each stage is further improved, and the defoaming efficiency is improved.

Meanwhile, through negative pressure environment and preset air pressure control, the technical scheme of the embodiment can effectively control the generation and distribution of bubbles in the tin bath. And dynamically adjusting the second target air pressure and the second negative pressure duration according to the air pressure change and the air bubble parameters in the tin bath, so as to realize the optimization of air bubble elimination. Through effectual bubble elimination, can improve the quality and the performance of glass product, reduce the rejection rate in the production process. The state and the change of the air bubble are monitored in real time by adopting an ultrasonic detection technology, so that accurate air bubble parameter acquisition and control are realized, and the efficiency and the stability of the production process are improved.

In summary, the technical scheme of the embodiment realizes effective elimination and optimization of bubbles at the bottom of the tin bath in the glass manufacturing process by combining vacuum technology, air pressure control and ultrasonic detection, and improves the quality of products and the production efficiency.

In one embodiment of the present invention, starting a vacuum pump to pump gas in a tin bath to generate a negative pressure initial environment, and controlling the negative pressure initial environment to maintain a first negative pressure duration, including:

S101, after the glass is fully flattened in a tin bath, collecting the temperature of the glass and the temperature of the inner cavity part of the tin bath after being fully flattened as first temperature information;

s102, acquiring a bubble parameter of a bottom of a tin bath after the glass is fully flattened in the tin bath by utilizing ultrasonic detection, and taking the bubble parameter as first bubble parameter information;

S103, setting a first target air pressure corresponding to a negative pressure initial environment according to the glass temperature and the temperature of the inner cavity part of the tin bath;

s104, starting a vacuum pump to pump gas in the tin bath so that the gas pressure in the tin bath reaches the first target gas pressure (namely a negative pressure initial environment), and simultaneously monitoring a change parameter of the gas pressure in the tin bath from the moment of starting the vacuum pump to the negative pressure stage when the tin bath reaches the negative pressure initial environment and a change parameter of the gas pressure in the tin bath in the process of keeping the duration of the first negative pressure in real time;

s105, after the air pressure in the tin bath reaches the first target air pressure, acquiring bubble parameters of the bottom of the tin bath of the glass by utilizing ultrasonic detection;

S106, collecting the glass temperature and the temperature of the inner cavity part of the tin bath as second temperature information after the air pressure in the tin bath reaches the first target air pressure;

and S107, setting a first negative pressure duration by using the second temperature information, and keeping the negative pressure initial environment until the first negative pressure duration is over.

The working principle of the technical scheme is as follows: after the glass is fully flattened in the tin bath, the temperatures of the glass and the inner cavity of the tin bath are collected as first temperature information. The temperature of the glass and the tin bath are important factors influencing bubble generation, and the bubble elimination process can be better controlled and optimized by monitoring the temperature. And acquiring the bubble parameters of the bottom of the tin bath after the glass is fully flattened in the tin bath by utilizing ultrasonic detection, and taking the bubble parameters as first bubble parameter information. The size, the number and the distribution of the bubbles can be accurately obtained by ultrasonic detection, and data support is provided for subsequent bubble elimination. And setting a first target air pressure corresponding to the negative pressure initial environment according to the glass temperature and the temperature of the inner cavity part of the tin bath. By comprehensively considering the temperatures of the glass and the tin bath, the target air pressure of the negative pressure environment can be set more accurately so as to adapt to different manufacturing conditions and requirements. And starting a vacuum pump to extract the gas in the tin bath, so that the gas pressure in the tin bath reaches a first target gas pressure (namely a negative pressure initial environment). Simultaneously, the internal air pressure change parameters of the tin bath in the period from the starting time of the vacuum pump to the negative pressure stage when the tin bath reaches the negative pressure initial environment and the internal air pressure change parameters of the tin bath in the first negative pressure duration maintaining process are monitored in real time. The real-time monitoring of the air pressure change is helpful for better controlling and adjusting the negative pressure environment and ensuring the effect of eliminating air bubbles. And after the air pressure in the tin bath reaches the first target air pressure, acquiring the bubble parameters of the bottom of the tin bath of the glass again by utilizing ultrasonic detection. This can be compared with the first bubble parameter information to further understand the change in the bubble. And after the air pressure in the tin bath reaches the first target air pressure, collecting the temperatures of the glass and the inner cavity of the tin bath as second temperature information. This can be compared with the first temperature information and the effect of temperature variations on the bubble elimination process is analyzed. And setting a first negative pressure duration by using the second temperature information, and keeping the negative pressure initial environment until the first negative pressure duration is over. By considering the temperature factors, the negative pressure duration can be set more accurately, and the effect of eliminating bubbles is further improved.

The technical scheme has the effects that: according to the technical scheme, through comprehensively considering the temperature of the glass and the tin bath and the air pressure change monitored in real time, the negative pressure environment and the bubble elimination process can be controlled more accurately, and the bubble elimination effect is improved. By continuously acquiring and analyzing the changes of temperature, air pressure and bubble parameters, the technical scheme of the embodiment can realize the dynamic optimization of the bubble elimination process and improve the production efficiency and the product quality. Through effectual bubble elimination, can improve the quality and the performance of glass product, reduce the rejection rate in the production process. The technical scheme of the embodiment organically combines temperature monitoring, air pressure control and ultrasonic detection, realizes comprehensive monitoring and control of the bubble elimination process, and improves the stability and reliability of the production process.

And extracting the gas in the tin bath through a vacuum pump to ensure that the gas pressure in the tin bath reaches a set first target gas pressure, thereby forming a negative pressure initial environment. The process of starting the vacuum pump until the tin bath reaches the negative pressure initial environment and the change parameters of the internal air pressure of the tin bath in the negative pressure period are monitored in real time, so that the accurate control of the negative pressure environment is realized. The first negative pressure duration is set by using the temperature information, and the negative pressure initial environment is maintained during the period. Is used for adapting to the requirements of the manufacturing process and improving the production efficiency. By monitoring the temperature and bubble parameters, and controlling the negative pressure initial environment, it is expected that some key performance indicators in the glass manufacturing process are optimized. These include uniformity of bubble distribution, shape and quality of the glass, etc., thereby improving the stability of the production process and quality of the glass product.

In summary, the technical scheme of the embodiment realizes the effective elimination and optimization of the bubbles at the bottom of the tin bath in the glass manufacturing process by comprehensively utilizing the vacuum technology, the air pressure control, the temperature monitoring and the ultrasonic detection technology, and improves the quality and the production efficiency of the product.

According to one embodiment of the invention, a first target air pressure corresponding to a negative pressure initial environment is set according to the glass temperature and the temperature of an inner cavity part of a tin bath, and the method comprises the following steps:

s1031, obtaining a temperature difference between the glass temperature and the inner cavity part of the tin bath according to the temperature between the glass temperature and the inner cavity part of the tin bath;

S1032, determining the current glass viscosity according to the glass temperature; wherein the glass viscosity is obtained by the following formula:

s1033, setting a first target air pressure according to the temperature difference between the glass temperature and the inner cavity part of the tin bath and the current glass viscosity.

The working principle of the technical scheme is as follows: the temperature difference between the glass temperature and the portion of the interior of the tin bath is obtained from the temperature between the glass temperature and the portion of the interior of the tin bath. The temperature difference is one of the important factors affecting bubble generation, and the bubble elimination process can be better understood and controlled by acquiring the temperature difference. The current glass viscosity is determined based on the glass temperature. Glass viscosity is another important factor affecting bubble generation, and bubble elimination process can be more accurately understood and controlled by obtaining glass viscosity. The above technical solution of the present embodiment calculates the glass viscosity by a given formula, where η represents the current glass viscosity, T01 represents the heating temperature at the time of melting the glass, T02 represents the temperature after melting the glass, T00 represents the temperature in the tin bath, and ρ represents the density of the glass. The first target gas pressure is set based on the temperature difference between the glass temperature and the portion of the chamber in the tin bath and the current glass viscosity. By comprehensively considering the glass temperature, the temperature difference of the inner cavity part of the tin bath and the glass viscosity, the target air pressure of the negative pressure environment can be set more accurately so as to adapt to different manufacturing conditions and requirements.

The technical scheme has the effects that: by comprehensively considering the glass temperature, the temperature difference of the inner cavity part of the tin bath and the glass viscosity, the technical scheme of the embodiment can more accurately set the target air pressure of the negative pressure environment and improve the effect of eliminating bubbles. By continuously acquiring and analyzing the temperature difference, the glass viscosity and the change of the air pressure, the technical scheme of the embodiment can realize the dynamic optimization of the bubble elimination process, and improve the production efficiency and the product quality. Through effectual bubble elimination, can improve the quality and the performance of glass product, reduce the rejection rate in the production process. The technical scheme of the embodiment organically combines temperature monitoring, viscosity calculation and air pressure control, realizes comprehensive monitoring and control of the bubble elimination process, and improves the stability and reliability of the production process. By comprehensively considering the glass temperature, the temperature difference and the current glass viscosity, the intelligent setting of the target air pressure of the negative pressure initial environment is realized, the fluidity and the shape of the glass are better controlled in the vacuum treatment, and the quality and the efficiency of the glass manufacturing process are improved.

In summary, the above technical solution of the present embodiment realizes effective elimination and optimization of bubbles at the bottom of the tin bath in the glass manufacturing process by comprehensively using the temperature monitoring, viscosity calculating and air pressure control technologies, and improves the quality of the product and the production efficiency.

In one embodiment of the invention, setting a first target gas pressure based on the temperature difference between the glass temperature and the portion of the interior of the tin bath and the current glass viscosity comprises:

step 1, extracting and utilizing ultrasonic detection to obtain bubble parameters of the bottom of a tin bath after the glass is fully flattened in the tin bath;

step 2, extracting the glass viscosity of the current glass;

Step 3, setting a first air pressure coefficient by utilizing the bubble parameters of the bottom of the tin bath and the glass viscosity of the current glass after the glass is fully flattened in the tin bath; the first air pressure coefficient is obtained through the following formula:

step 4, setting a first target air pressure by utilizing the first air pressure coefficient and combining the volume of the current liquid glass and the bubble parameters of the bottom of the tin bath after the glass is fully flattened in the tin bath, wherein the first target air pressure is obtained through the following formula:

P₀₁＝P₀-ΔP₀₁

The working principle of the technical scheme is as follows: and extracting bubble parameters of the bottom of the tin bath after the glass obtained by ultrasonic detection is fully flattened in the tin bath. The size, the number and the distribution of the bubbles can be accurately obtained by ultrasonic detection, and data support is provided for subsequent bubble elimination. The glass viscosity of the current glass is extracted. Glass viscosity is another important factor affecting bubble generation, and bubble elimination process can be more accurately understood and controlled by obtaining glass viscosity. And setting a first air pressure coefficient by utilizing the bubble parameters at the bottom of the tin bath after the glass is fully flattened in the tin bath and the glass viscosity of the current glass. And setting a first target air pressure by utilizing the first air pressure coefficient and combining the volume of the current liquid glass and the bubble parameters at the bottom of the tin bath after the glass is fully flattened in the tin bath. The above technical solution of the present embodiment calculates the first target air pressure by a given formula.

The technical scheme has the effects that: by comprehensively considering a plurality of factors such as bubble parameters, glass viscosity, liquid glass volume, tin bath inner cavity volume and the like, the technical scheme of the embodiment can more accurately set target air pressure of a negative pressure environment, and the effect of bubble elimination is improved. By continuously acquiring and analyzing the changes of the bubble parameters, the glass viscosity, the liquid glass volume and the air pressure, the technical scheme of the embodiment can realize the dynamic optimization of the bubble elimination process and improve the production efficiency and the product quality. Through effectual bubble elimination, can improve the quality and the performance of glass product, reduce the rejection rate in the production process. The technical scheme of the embodiment organically combines ultrasonic detection, viscosity calculation, air pressure coefficient and target air pressure setting, realizes comprehensive monitoring and control of the bubble elimination process, and improves the stability and reliability of the production process.

In summary, the above technical solution of the present embodiment realizes effective elimination and optimization of bubbles at the bottom of the tin bath in the glass manufacturing process by comprehensively using the ultrasonic detection, viscosity calculation, air pressure coefficient and target air pressure setting technology, and improves the quality of the product and the production efficiency. Meanwhile, through fully utilizing information such as bubble parameters, glass viscosity and the like obtained by ultrasonic detection, the physical characteristics of gas and the rheological property of glass are comprehensively considered, intelligent setting of target air pressure in a negative pressure initial environment is realized, the fluidity and shape control accuracy of glass in a vacuum treatment process are improved, and the stability of the glass manufacturing process and the quality of products are further improved.

In one embodiment of the present invention, the setting the first negative pressure duration using the second temperature information includes:

S1071, the glass temperature and the temperature of the inner cavity part of the tin bath after the air pressure in the tin bath reaches the first target air pressure are adjusted;

S1072, acquiring a temperature difference value between the glass temperature and the inner cavity part of the tin bath after the air pressure in the tin bath reaches the first target air pressure according to the glass temperature and the inner cavity part of the tin bath after the air pressure in the tin bath reaches the first target air pressure;

S1073, setting a first negative pressure duration by utilizing the temperature difference between the glass temperature and the inner cavity part of the tin bath after the air pressure in the tin bath reaches the first target air pressure and the temperature difference between the glass temperature and the inner cavity part of the tin bath after the glass is fully flattened in the tin bath.

Wherein, utilize the atmospheric pressure in the tin bath reach after the first target atmospheric pressure the glass temperature and the temperature difference of tin bath inner chamber part and glass temperature and tin bath inner chamber part after the glass fully shakeouts in the tin bath inside set up first negative pressure duration, include:

step1, extracting a difference value between the glass temperature and the temperature of an inner cavity part of a tin bath after the glass is fully flattened in the tin bath;

step 2, extracting a temperature difference value between the glass temperature and the inner cavity part of the tin bath after the air pressure in the tin bath reaches the first target air pressure;

step 3, extracting bubble parameters at the bottom of the tin bath after the air pressure in the tin bath reaches the first target air pressure;

Step 4, setting a first negative pressure duration by utilizing a temperature difference value between the glass temperature and the inner cavity part of the tin bath after the air pressure in the tin bath reaches the first target air pressure and a temperature difference value between the glass temperature and the inner cavity part of the tin bath after the glass is fully flattened in the tin bath, and combining a bubble parameter of the bottom of the tin bath after the air pressure in the tin bath reaches the first target air pressure, wherein the first negative pressure duration comprises:

The working principle of the technical scheme is as follows: and (3) adjusting the glass temperature and the temperature of the inner cavity part of the tin bath after the air pressure in the tin bath reaches the first target air pressure. These data are critical for subsequent barometric control and temperature analysis. And acquiring a temperature difference between the glass temperature after the air pressure in the tin bath reaches the first target air pressure and the inner cavity part of the tin bath according to the glass temperature after the air pressure in the tin bath reaches the first target air pressure and the inner cavity part of the tin bath. The change in the temperature difference can reflect the generation and elimination of bubbles. And setting a first negative pressure duration by utilizing the temperature difference between the glass temperature after the air pressure in the tin bath reaches the first target air pressure and the temperature difference between the glass temperature after the glass is fully flattened in the tin bath and the temperature difference between the glass temperature and the temperature of the inner cavity part in the tin bath. The above technical solution of the present embodiment considers, in addition to the temperature difference, the change of the bubble parameter, so as to set the negative pressure duration more accurately.

Specifically, the difference between the glass temperature after the glass is sufficiently flattened inside the tin bath and the temperature of the inner cavity portion of the tin bath is extracted. This data provides a reference for subsequent negative pressure duration settings. And extracting the difference between the glass temperature after the air pressure in the tin bath reaches the first target air pressure and the temperature of the inner cavity part of the tin bath. This data reflects the effect of air pressure control and the elimination of air bubbles. And extracting bubble parameters at the bottom of the tin bath after the air pressure in the tin bath reaches the first target air pressure. The variation of the bubble parameters is critical to determining the proper negative pressure duration. And setting a first negative pressure duration by utilizing the temperature difference between the glass temperature after the air pressure in the tin bath reaches the first target air pressure and the temperature difference between the glass temperature after the glass is fully flattened in the tin bath and the temperature difference between the glass temperature and the temperature difference between the inner cavity part of the tin bath and combining the bubble parameters of the bottom of the tin bath after the air pressure in the tin bath reaches the first target air pressure. This process takes into account the temperature difference, air pressure and air bubble parameters in combination to achieve a more accurate negative pressure duration setting.

The technical scheme has the effects that: by comprehensively considering the temperature difference between the glass and the tin bath and the change of the air pressure and the air bubble parameters, the technical scheme of the embodiment can more accurately set the negative pressure duration and improve the effect of eliminating the air bubbles. By continuously acquiring and analyzing the temperature difference, the air pressure and the change of the air bubble parameters, the technical scheme of the embodiment can realize the dynamic optimization of the air bubble elimination process, and improve the production efficiency and the product quality. Through effectual bubble elimination, can improve the quality and the performance of glass product, reduce the rejection rate in the production process. The technical scheme of the embodiment organically combines the temperature difference, the air pressure and the air bubble parameters, realizes the comprehensive monitoring and control of the air bubble elimination process, and improves the stability and reliability of the production process.

In summary, the above technical solution of the present embodiment realizes effective elimination and optimization of bubbles at the bottom of the tin bath in the glass manufacturing process by comprehensively using the temperature difference, the air pressure and the bubble parameter technology, and improves the quality of the product and the production efficiency.

In one embodiment of the present invention, after a first negative pressure duration, setting a second target air pressure and a second negative pressure duration of a defoaming stage by using an internal air pressure variation parameter of the tin bath and a bubble parameter of a bottom of the tin bath after the first negative pressure duration in a process of reaching a negative pressure initial environment of the tin bath and the first negative pressure duration, including:

S201, after a first negative pressure duration, a change parameter of the internal air pressure of the tin bath in a negative pressure stage from the starting time of the vacuum pump to the time when the tin bath reaches a negative pressure initial environment and a change parameter of the internal air pressure of the tin bath in a first negative pressure duration maintaining process are called;

S202, acquiring a vacuum pump motion characteristic factor by utilizing a tin bath internal air pressure change parameter from the starting moment of the vacuum pump to the negative pressure stage when the tin bath reaches a negative pressure initial environment and the tin bath internal air pressure change parameter in the first negative pressure duration maintaining process; the motion characteristic factor of the vacuum pump is obtained through the following formula:

S203, acquiring current bubble parameters of the bottom of the tin bath by utilizing ultrasonic detection as second bubble parameter information;

S204, first bubble parameter information is called, wherein the first bubble parameter information is the bubble parameter of the bottom of the tin bath after the glass is fully flattened in the tin bath;

S205, acquiring a negative pressure bubble change factor by utilizing the first bubble parameter information and the second bubble parameter information; wherein, the negative pressure bubble change factor is obtained by the following formula:

S206, setting a second target air pressure and a second negative pressure duration by using the vacuum pump movement characteristic factor and the negative pressure bubble change factor.

Wherein, utilize vacuum pump motion characteristic factor and bubble change factor to set up second target atmospheric pressure and second negative pressure duration, include:

S2061, collecting a vacuum pump motion characteristic factor and a negative pressure bubble change factor;

S2062, setting a second target air pressure and a second negative pressure duration by utilizing the vacuum pump movement characteristic factor and the negative pressure bubble change factor, wherein the second target air pressure and the second negative pressure duration are obtained by the following formula:

P₀₂＝P₀-ΔP₀₂

ΔP₀₂＝(1+E_y/E_x)·ΔP₀₁

T_s02＝(1+E_y/E_x)·T_s01

The working principle of the technical scheme is as follows: after the first negative pressure period, the above technical solution of the present embodiment further optimizes the bubble elimination process. By analyzing the change of the internal air pressure change parameter of the tin bath and the change of the bubble parameter, the second target air pressure and the second negative pressure duration of the defoaming stage are set more accurately.

Specifically, the internal air pressure change parameter of the tin bath in the negative pressure stage from the starting time of the vacuum pump to the time when the tin bath reaches the negative pressure initial environment and the internal air pressure change parameter of the tin bath in the first negative pressure duration maintaining process are called. These data provide detailed information on the pressure change, facilitating subsequent pressure control. And acquiring a vacuum pump movement characteristic factor by utilizing the tin bath internal air pressure change parameter from the starting moment of the vacuum pump to the negative pressure stage when the tin bath reaches the negative pressure initial environment and the tin bath internal air pressure change parameter in the first negative pressure duration maintaining process. This factor reflects the operating state and efficiency of the vacuum pump and helps to control the air pressure more accurately. And acquiring the current bubble parameters at the bottom of the molten tin bath by utilizing ultrasonic detection as second bubble parameter information. The elimination condition of the bubbles can be known more accurately by monitoring the change of the bubble parameters in real time. And (5) calling first bubble parameter information, namely the bubble parameters at the bottom of the tin bath after the glass is fully flattened in the tin bath. This data provides a reference for subsequent bubble change analysis. And acquiring a negative pressure bubble change factor by utilizing the first bubble parameter information and the second bubble parameter information. This factor reflects the change in bubble under negative pressure, helping to set the second target air pressure and the second negative pressure duration more accurately. And setting a second target air pressure and a second negative pressure duration by using the vacuum pump movement characteristic factor and the negative pressure bubble change factor. This process combines the variation of air pressure control and bubble parameters to achieve more accurate air pressure control and bubble elimination.

The technical scheme has the effects that: by comprehensively considering the working state of the vacuum pump, the air pressure change and the change of the air bubble parameters, the technical scheme of the embodiment can more accurately set the second target air pressure and the second negative pressure duration, and further improves the air bubble elimination effect. By continuously acquiring and analyzing the air pressure change and the change of the bubble parameters, the technical scheme of the embodiment can realize the dynamic optimization of the bubble elimination process, and further improve the production efficiency and the product quality. Through effectual bubble elimination, can further improve the quality and the performance of glass product, further reduce the rejection rate in the production process. The technical scheme of the embodiment organically combines the working state, the air pressure change and the air bubble parameters of the vacuum pump, realizes the comprehensive monitoring and control of the air bubble elimination process, and further improves the stability and reliability of the production process.

In summary, the above technical solution of the present embodiment realizes further optimization of eliminating bubbles at the bottom of the tin bath in the glass manufacturing process by comprehensively using the vacuum pump working state, the air pressure variation and the bubble parameter technology, and further improves the quality and the production efficiency of the product.

In one embodiment of the present invention, after the second negative pressure duration is over, ultrasonic detection is used to obtain a bubble parameter of the bottom of the tin bath after the second negative pressure duration, and it is determined whether the bubble parameter of the bottom of the tin bath after the second negative pressure duration meets a bubble elimination requirement, and the bubble elimination optimization of the bottom of the tin bath is performed according to the determination result, including:

S301, acquiring bubble parameters of the bottom of the tin bath after the second negative pressure duration by utilizing ultrasonic detection after the second negative pressure duration is over;

S302, comparing the bubble parameters at the bottom of the tin bath after the second negative pressure time with preset bubble parameter thresholds to obtain comparison results;

s303, when the comparison result shows that the bubble parameters of the bottom of the tin bath after the second negative pressure duration do not meet the preset bubble parameter threshold requirements, the bubble parameters of the bottom of the tin bath after the second negative pressure duration are called;

s304, first bubble parameter information and second bubble parameter information are called, and first parameter change data are obtained through the first bubble parameter information and the second bubble parameter information;

S305, comparing the bubble parameters of the bottom of the tin bath after the second negative pressure duration with the bubble parameters of the bottom of the tin bath after the first negative pressure duration to obtain second parameter variation data;

S306, acquiring a parameter change coefficient by using the first parameter change data and the second parameter change data parameters; the parameter change coefficient is obtained through the following formula:

s307, the internal air pressure change parameters of the tin bath in the defoaming stage are called;

S308, acquiring a negative pressure fluctuation factor corresponding to the defoaming stage by utilizing the internal air pressure change parameter of the tin bath in the defoaming stage; wherein, the negative pressure fluctuation factor is obtained by the following formula:

s309, acquiring a third target air pressure and a third negative pressure duration by using the negative pressure fluctuation factor, wherein the third target air pressure and the third negative pressure duration are acquired by the following formula:

P₀₃＝P₀-ΔP₀₃

ΔP₀₂＝(1+E_b)·ΔP₀₂

T_s03＝(1-E_b)·T_s02

S3010, performing negative pressure operation according to the third target air pressure and the third negative pressure duration, and completing the elimination and optimization of the bubbles at the bottom of the tin bath.

The working principle of the technical scheme is as follows: and after the second negative pressure duration is over, acquiring the bubble parameters of the bottom of the tin bath after the second negative pressure duration by utilizing ultrasonic detection. This data provides real-time feedback of the bubble removal effect. And comparing the bubble parameters of the bottom of the tin bath after the second negative pressure time with a preset bubble parameter threshold value to obtain a comparison result. The above technical solution of the present embodiment is used for judging whether the bubble elimination achieves the expected effect. When the comparison result shows that the bubble parameters at the bottom of the tin bath after the second negative pressure duration do not meet the preset bubble parameter threshold requirements, further analyzing the bubble parameter changes after the first negative pressure duration and the second negative pressure duration and the parameter change coefficients. These data are used to more accurately evaluate the effect of bubble elimination and determine the direction of subsequent optimization. And (5) calling the internal air pressure change parameters of the tin bath in the defoaming stage. These data help to analyze the air pressure control effect of the defoaming stage.

S308, step: and acquiring a negative pressure fluctuation factor corresponding to the defoaming stage by utilizing the internal air pressure change parameter of the tin bath in the defoaming stage. This factor reflects the stability of the pneumatic control and is critical to optimizing the bubble elimination process. And acquiring a third target air pressure and a third negative pressure duration by using the negative pressure fluctuation factor. The above technical solution of the present embodiment resets more accurate air pressure control parameters based on real-time feedback of air pressure control, so as to achieve more effective air bubble elimination. And performing negative pressure operation according to the third target air pressure and the third negative pressure duration to complete the elimination and optimization of the bubbles at the bottom of the tin bath. The above technical solution of the present embodiment applies the reset air pressure control parameters to actual production, so as to achieve further optimization of air bubble elimination.

The technical scheme has the effects that: the bubble parameters at the bottom of the tin bath are obtained in real time through ultrasonic detection and compared with the preset threshold value, so that the effect of bubble elimination can be known in time, and real-time feedback is provided for subsequent optimization. By analyzing the change of the bubble parameters and the change of the air pressure control parameters after the first negative pressure duration and the second negative pressure duration, the effect of eliminating the bubbles can be estimated more accurately, and an accurate basis is provided for subsequent optimization. According to the results of real-time feedback and accurate assessment, the third target air pressure and the third negative pressure duration are dynamically adjusted, so that the dynamic optimization of the bubble elimination process can be realized, and the production efficiency and the product quality are further improved. Through effective bubble elimination optimization, the quality and performance of the glass product can be further improved, and the rejection rate in the production process is further reduced. The technical scheme of the embodiment organically combines ultrasonic detection, air pressure control and bubble parameters, realizes comprehensive monitoring and control of the bubble elimination process, and further improves the stability and reliability of the production process.

In summary, the technical scheme of the embodiment realizes further optimization of tin bath bottom bubble elimination in the glass manufacturing process through real-time feedback, accurate evaluation and dynamic optimization, and improves the quality of products and the production efficiency.

The embodiment of the invention provides a system for adjusting and controlling bubble defects at the bottom of a tin bath, as shown in fig. 2, comprising:

It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. The method for adjusting and controlling the bubble defects at the bottom of the tin bath is characterized by comprising the following steps:

after the second negative pressure duration is over, ultrasonic detection is utilized to obtain the bubble parameters of the bottom of the tin bath after the second negative pressure duration, whether the bubble parameters of the bottom of the tin bath after the second negative pressure duration meet the bubble elimination requirement is judged, and bubble elimination optimization of the bottom of the tin bath is carried out according to the judgment result;

after the first negative pressure duration, setting a second target air pressure and a second negative pressure duration of a defoaming stage by utilizing an air pressure change parameter inside the tin bath in a process that the tin bath reaches a negative pressure initial environment and the first negative pressure duration is kept and an air bubble parameter at the bottom of the tin bath after the first negative pressure duration, wherein the method comprises the following steps:

；

setting a second target air pressure and a second negative pressure duration by utilizing the vacuum pump movement characteristic factor and the negative pressure bubble change factor;

setting a second target air pressure and a second negative pressure duration by using the vacuum pump movement characteristic factor and the air bubble change factor, including:

；

Wherein T _s02 represents a second negative pressure duration; t _s01 represents a first negative pressure duration;

After the second negative pressure duration is finished, ultrasonic detection is utilized to obtain the bubble parameters of the bottom of the tin bath after the second negative pressure duration, whether the bubble parameters of the bottom of the tin bath after the second negative pressure duration meet the bubble elimination requirement is judged, and bubble elimination optimization of the bottom of the tin bath is carried out according to the judgment result, and the method comprises the following steps:

；

Wherein B _λ represents a parameter variation coefficient; b _q00 represents the bubble concentration at the bottom of the tin bath after the glass is fully flattened in the tin bath; b _q02 represents the bubble concentration at the bottom of the tin bath after the first negative pressure period; b _q03 represents the bubble concentration at the bottom of the tin bath after the second negative pressure period; b ₀ denotes a preset reference coefficient value; b _m represents the bubble concentration at the bottom of the tin bath corresponding to the bubble elimination requirement;

；

Wherein T _s03 represents a third negative pressure duration; t _s02 represents a second negative pressure duration;

2. The method for controlling bubble defect adjustment of a bottom of a molten tin bath according to claim 1, wherein starting a vacuum pump to pump gas in the molten tin bath to generate a negative pressure initial environment and controlling the negative pressure initial environment to maintain a first negative pressure duration comprises:

Starting a vacuum pump to pump gas in the tin bath so that the gas pressure in the tin bath reaches the first target gas pressure, and simultaneously monitoring the change parameters of the gas pressure in the tin bath from the starting time of the vacuum pump to the negative pressure stage when the tin bath reaches the negative pressure initial environment and the change parameters of the gas pressure in the tin bath in the first negative pressure duration maintaining process in real time;

3. The method for controlling bubble defect adjustment in a bottom of a molten tin bath according to claim 2, wherein setting a first target air pressure corresponding to a negative pressure initial environment according to the glass temperature and a temperature of an inner cavity portion of the molten tin bath comprises:

Determining a current glass viscosity from the glass temperature; wherein the current glass viscosity is obtained by the following formula:

；

4. The method for controlling bubble defect adjustment in a molten tin bath bottom according to claim 3, wherein setting a first target gas pressure according to a temperature difference between the glass temperature and a portion of the inner cavity of the molten tin bath and the current glass viscosity comprises:

extracting the current glass viscosity of the glass;

Setting a first air pressure coefficient by utilizing the bubble parameters at the bottom of the tin bath after the glass is fully flattened in the tin bath and the current glass viscosity of the glass; the first air pressure coefficient is obtained through the following formula:

；

5. The method for controlling bubble defect adjustment at the bottom of a molten tin bath according to claim 2, wherein the setting of the first negative pressure period by using the second temperature information comprises:

6. The method according to claim 5, wherein setting a first negative pressure duration using a difference between the glass temperature and a temperature of an inner cavity portion of the molten tin bath after the gas pressure in the molten tin bath reaches the first target gas pressure and a difference between the glass temperature and a temperature of an inner cavity portion of the molten tin bath after the glass is sufficiently flattened inside the molten tin bath, comprises:

；

7. A system for controlling bubble defect at the bottom of a tin bath, comprising:

The optimized negative pressure control module is used for acquiring the bubble parameters of the bottom of the tin bath after the second negative pressure duration by utilizing ultrasonic detection after the second negative pressure duration is over, judging whether the bubble parameters of the bottom of the tin bath after the second negative pressure duration meet the bubble elimination requirement or not, and performing bubble elimination optimization of the bottom of the tin bath according to a judgment result;

After the first negative pressure duration, setting a second target air pressure and a second negative pressure duration of a defoaming stage by utilizing an air pressure change parameter inside the tin bath in a process of reaching a negative pressure initial environment of the tin bath and maintaining the first negative pressure duration and an air bubble parameter at the bottom of the tin bath after the first negative pressure duration, wherein the method comprises the following steps:

；