A method for predicting the lifespan of overflow bricks

Abstract

This application discloses a method for predicting the lifespan of overflow bricks, comprising the following steps: S1, periodically measuring the overflow brick deformation rate K under corresponding operating conditions using an overflow brick deformation measuring device, or calculating it based on the principles of material mechanics and creep theory, wherein the corresponding operating conditions include the operating temperature of the overflow brick, the height of the overflow brick, and the support span; S2, determining the maximum allowable creep deformation d of the overflow brick... t The remaining working life of the overflow brick is calculated by taking the creep deformation rate K of the overflow brick and the known deformation amount of the overflow brick. The overflow brick life prediction method of this application can obtain a relatively accurate remaining life of the overflow brick. Based on the obtained remaining life of the overflow brick, it has important guiding significance for adjusting the production process, and plays an important practical role in the company's rational resource allocation, capacity planning, ensuring the continuous supply capacity to downstream manufacturers, adjusting the production process, and ensuring product quality.

Description

Technical Field

[0001] This application relates to the field of overflow brick measurement technology, and in particular, to a method for predicting the lifespan of overflow bricks. Background Technology

[0002] Substrate glass is a key material in the flat panel display industry, and the overflow method is the mainstream production process for substrate glass, offering advantages such as high surface smoothness and flatness. With the development of high-generation LCD panel technology, higher requirements are placed on the quality of the substrate glass, especially flatness, warpage, and stress. The overflow brick is one of the core components of the forming device; molten glass flows into the overflow tank, overflows from both sides of the overflow brick, and finally converges at the brick tip to form a glass sheet. The overflow brick is closely related to the thickness uniformity and flatness of the glass substrate.

[0003] Currently, 8.5-generation LCD panel lines have become the mainstream in the display industry both domestically and internationally. The overflow bricks used in these 8.5-generation substrate glass production lines are typically over 3100mm long and are usually installed in a muffle furnace with supports at both ends. In actual production, the overflow bricks operate at temperatures between 1100℃ and 1300℃, bearing the weight of themselves and the molten glass. This causes them to slowly creep and deform, affecting their lifespan. Specifically, this deformation manifests as a downward deflection in the middle of the overflow brick. This deflection affects the thickness and flatness of the glass sheet. When the accumulated deflection reaches a certain level, the overflow bricks will eventually reach the end of their lifespan, making it impossible to produce qualified glass sheets. Therefore, accurately predicting the lifespan of the overflow bricks is crucial for adjusting production processes and is of great practical significance for companies to rationally allocate resources, plan production capacity, and ensure a continuous supply to downstream manufacturers. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a method for predicting the lifespan of overflow bricks, thereby accurately predicting the service life of overflow bricks.

[0005] The technical solution adopted in this application is as follows:

[0006] A method for predicting the lifespan of overflow bricks, comprising the following steps:

[0007] S1. The creep deformation rate K of the overflow brick under the corresponding working conditions is obtained by periodically measuring the overflow brick deformation using an overflow brick deformation measuring device, or by calculating it according to the principles of material mechanics and creep theory. The corresponding working conditions include the working temperature of the overflow brick, the height of the overflow brick, and the support span.

[0008] S2, based on the maximum allowable creep deformation d of the overflow brick t The remaining working life of the overflow brick is calculated by taking the creep deformation rate K of the overflow brick and the known deformation amount of the overflow brick.

[0009] Furthermore, it also includes the following steps:

[0010] S3. When the calculated remaining working life of the overflow brick does not meet the design requirements, correct the corresponding operating conditions and repeat steps S1 to S2 until the calculated remaining working life of the overflow brick meets the design requirements.

[0011] Furthermore, in step S2, the maximum allowable creep deformation d of the overflow brick is... t The maximum allowable creep deformation of the overflow bricks was determined by dismantling the scrapped muffle furnace of the production line and measuring and determining it.

[0012] Furthermore, in step S2, the maximum allowable creep deformation d of the overflow brick is... t The diameter is 30mm to 50mm.

[0013] Further, step S1 specifically includes the following steps:

[0014] S101. In actual production, the deformation of the overflow brick is periodically measured using an overflow brick deformation measuring device to obtain several corresponding working times t. i and overflow brick deformation d i ;

[0015] S102, the several corresponding working times t i and overflow brick deformation d i Linear fitting was performed to obtain the creep deformation rate K of the overflow brick in actual production.

[0016] Furthermore, step S2 specifically includes the following steps:

[0017] S201, based on the maximum allowable creep deformation d of the overflow brick t The creep deformation rate K of the overflow brick and the corresponding working time t i The measured deformation d of the overflow brick i The remaining working life t of the overflow brick was calculated. s :

[0018] t s＝ (d t -d i ) / K.

[0019] Further, step S1 specifically includes the following steps:

[0020] S111. During the overflow brick design phase, based on the width of the glass plate products to be produced and the overflow forming design theory, the relevant parameters of the overflow brick are initially determined, including the height value H1 and the support span L1.

[0021] S112. Select the material for making the overflow brick, process creep specimens, and then conduct high-temperature creep tests on the specimens. Combine the creep law formula of the overflow brick material with the data obtained from the tests, process and fit the data to obtain the relevant creep parameters A, n, Q of the overflow brick material, and the material density ρ of the overflow brick:

[0022]

[0023] in, Let σ be the creep strain rate, σ be the stress, n be the stress exponent between 1 and 5, T be the operating temperature, Q = ΔH / R, R be the universal constant, and ΔH be the creep activation energy. The material density ρ of the overflow brick is 3.0 g / cm³. 3 ~5.0g / cm 3 ;

[0024] S113. Based on the formula of the glass product to be produced, test the viscosity-temperature curve of the glass, and then determine the working temperature T of the overflow brick according to the viscosity-temperature curve of the glass and the overflow forming theory. The working temperature T of the overflow brick is 1373K~1573K.

[0025] S114. Using the parameter values ​​obtained in steps S111 to S113, calculate the creep rate K of the overflow brick according to the creep deformation rate formula:

[0026]

[0027] Wherein, H is the height of the overflow brick, which is between 500mm and 1200mm; L is the support span between the two end support points when the overflow brick is installed, which is between 2000mm and 4000mm; parameter C1 is a coefficient related to the height, which is between 3.0 and 3.25; parameter C2 is a coefficient related to the span, which is between 0.31 and 0.42.

[0028] Furthermore, step S2 specifically includes the following steps:

[0029] S211, Based on the maximum allowable creep deformation d of the overflow brick t The creep deformation rate K of the overflow brick is calculated, and the remaining working life t of the overflow brick is obtained. s :

[0030] t s＝ (d t -d0) / K,

[0031] Wherein, d0 is the initial elastic deformation of the overflow brick in the cold state after installation, which is obtained by calculation or simulation methods based on elasticity theory.

[0032] Furthermore, step S3 specifically includes the following steps:

[0033] S301. When the calculated remaining working life of the overflow brick does not meet the design requirements, the working temperature of the overflow brick is adjusted multiple times: T2 = T1 – T0, where T1 is the original working temperature of the overflow brick, T0 is the working temperature adjustment value of the overflow brick, and T2 is the working temperature of the overflow brick after adjustment.

[0034] S302. Based on the adjusted working temperature of the overflow brick and the creep deformation rate formula of the overflow brick, calculate the deformation rate K and remaining life t of the overflow brick multiple times. S Considering the overall production line's process adjustment capabilities and the remaining lifespan of the overflow bricks, a suitable working temperature adjustment value T0 is selected.

[0035] S303. Adjust the production equipment process, lower the working temperature of the overflow brick to T0 degree, and repeat steps S1 to S2 to calculate the creep deformation rate and remaining working life of the adjusted overflow brick.

[0036] Furthermore, step S3 specifically includes the following steps:

[0037] S311. When the calculated remaining working life of the overflow brick does not meet the design requirements, the height value H2 and the support span L2 of the overflow brick are adjusted multiple times to obtain the corrected value.

[0038] S312. With all other parameter values ​​remaining unchanged, based on the height H2 of the overflow brick and the support span L2 after multiple corrections, recalculate the creep deformation rate K2 and the remaining working life t of the adjusted overflow brick. S2 Until the creep deformation rate K2 and remaining working life t of the adjusted overflow brick are determined. S2 Meets design requirements;

[0039] S313. Adjust the design parameters of the production equipment. After adopting the corrected overflow brick height value H2 and support span L2, repeat steps S1 to S2 to calculate the adjusted overflow brick creep deformation rate and remaining working life.

[0040] This application has the following beneficial effects:

[0041] This application provides a method for predicting the lifespan of overflow bricks, including the following steps: S1, periodically measuring the overflow brick deformation using an overflow brick deformation measuring device, or calculating the overflow brick creep deformation rate K under corresponding operating conditions based on the principles of material mechanics and creep theory, wherein the corresponding operating conditions include the operating temperature of the overflow brick, the height of the overflow brick, and the support span; S2, based on the maximum allowable creep deformation d of the overflow brick... tThe remaining working life of the overflow brick is calculated by taking the creep deformation rate K of the overflow brick and the known deformation amount of the overflow brick. The overflow brick life prediction method of this application can obtain a relatively accurate remaining life of the overflow brick. Based on the obtained remaining life of the overflow brick, it has important guiding significance for adjusting the production process, and plays an important practical role in the company's rational resource allocation, capacity planning, ensuring the continuous supply capacity to downstream manufacturers, adjusting the production process, and ensuring product quality.

[0042] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. The application will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0043] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0044] Figure 1 This is a schematic diagram of the overflow brick life prediction method according to a preferred embodiment of this application.

[0045] Figure 2 This is a schematic diagram of the overflow brick life prediction method according to another preferred embodiment of this application.

[0046] Figure 3 This is a flowchart illustrating a sub-step of step S1 in a preferred embodiment of this application.

[0047] Figure 4 This is a schematic diagram of linear fitting of the creep deformation rate K of the overflow brick in a preferred embodiment of this application.

[0048] Figure 5 This is a flowchart illustrating a sub-step of step S2 in a preferred embodiment of this application.

[0049] Figure 6 This is a flowchart illustrating a sub-step of step S3 in a preferred embodiment of this application.

[0050] Figure 7 This is a flowchart illustrating a sub-step of step S1 in another preferred embodiment of this application.

[0051] Figure 8 This is a flowchart illustrating a sub-step of step S2 in another preferred embodiment of this application.

[0052] Figure 9 This is a flowchart illustrating a sub-step of step S3 in another preferred embodiment of this application. Detailed Implementation

[0053] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0054] Reference Figure 1 A preferred embodiment of this application provides a method for predicting the lifespan of overflow bricks, including the following steps:

[0055] S1. The creep deformation rate K of the overflow brick under the corresponding working conditions is obtained by periodically measuring the overflow brick deformation using an overflow brick deformation measuring device, or by calculating it according to the principles of material mechanics and creep theory. The corresponding working conditions include the working temperature of the overflow brick, the height of the overflow brick, and the support span.

[0056] S2, based on the maximum allowable creep deformation d of the overflow brick t The remaining working life of the overflow brick is calculated by taking the creep deformation rate K of the overflow brick and the known deformation amount of the overflow brick.

[0057] This embodiment provides a method for predicting the lifespan of overflow bricks, including the following steps: S1, periodically measuring the overflow brick deformation using an overflow brick deformation measuring device, or calculating the overflow brick creep deformation rate K under corresponding operating conditions based on the principles of material mechanics and creep theory, wherein the corresponding operating conditions include the operating temperature of the overflow brick, the height of the overflow brick, and the support span; S2, based on the maximum allowable creep deformation d of the overflow brick... t The remaining working life of the overflow brick is calculated by taking the overflow brick creep deformation rate K and the known deformation amount of the overflow brick. The overflow brick life prediction method in this embodiment can obtain a relatively accurate remaining life of the overflow brick. Based on the obtained remaining life of the overflow brick, it has important guiding significance for adjusting the production process, and plays an important practical role in the company's rational resource allocation, capacity planning, ensuring the continuous supply capacity to downstream manufacturers, adjusting the production process, and ensuring product quality.

[0058] like Figure 2 In a preferred embodiment of this application, the overflow brick life prediction method further includes the following steps:

[0059] S3. When the calculated remaining working life of the overflow brick does not meet the design requirements, correct the corresponding operating conditions and repeat steps S1 to S2 until the calculated remaining working life of the overflow brick meets the design requirements.

[0060] In this embodiment, when the calculated remaining working life of the overflow brick does not meet the design requirements, the existing operating conditions are modified to meet the design requirements. By repeating steps S1 to S2, the remaining working life of the overflow brick is iteratively adjusted to obtain the remaining working life of the overflow brick that meets the design requirements. This extends the remaining working life of the overflow brick, reduces production costs, and improves the competitiveness of the product.

[0061] In a preferred embodiment of this application, in step S2, the maximum allowable creep deformation d of the overflow brick is... t The maximum allowable creep deformation of the overflow bricks, d, was obtained by dismantling a scrapped muffle furnace from the production line and measuring and determining the deformation. t The diameter is 30mm to 50mm.

[0062] like Figure 3 As shown, in a preferred embodiment of this application, step S1 specifically includes the following steps:

[0063] S101. In actual production, the deformation of the overflow brick is periodically measured using an overflow brick deformation measuring device to obtain several corresponding working times t. i and overflow brick deformation d i See Table 1 for details:

[0064] Working hours <![CDATA[t1]]> <![CDATA[t2]]> <![CDATA[t3]]> <![CDATA[t4]]> <![CDATA[t5]]> ----- <![CDATA[t i ]]> Overflow brick deformation <![CDATA[d1]]> <![CDATA[d2]]> <![CDATA[d3]]> <![CDATA[d4]]> <![CDATA[d5]]> ----- <![CDATA[d i ]]>

[0065] S102, the several corresponding working times t i and overflow brick deformation d i Linear fitting was performed to obtain the creep deformation rate K of the overflow brick in actual production.

[0066] According to the following formula, the creep deformation rate of the overflow brick is as follows:

[0067]

[0068] Where H is the height of the overflow brick, ranging from 500mm to 1200mm; L is the support span between the two end support points during overflow brick installation, ranging from 2000mm to 4000mm; parameter C1 is a coefficient related to the height, ranging from 3.0 to 3.25; parameter C2 is a coefficient related to the span, ranging from 0.31 to 0.42. Creep parameters A, n, and Q can be obtained from creep tests and do not change with temperature or time. Once installed, the density ρ, height H, and installation span L of the overflow brick are also constant values. During production, when the process is properly adjusted, the process temperature T remains essentially constant. Therefore, for overflow bricks in stable production, their creep rate maintains an approximately constant value K, the magnitude of which does not change with time.

[0069]

[0070] like Figure 4 As shown, the obtained overflow brick deformation d is processed using data processing software. i and its working hours t i By performing linear fitting, the accurate value of the creep deformation rate K of the overflow brick in actual production can be obtained.

[0071] This embodiment uses real deformation data from field tests for fitting, which can obtain a more accurate creep deformation rate, thereby calculating a more accurate remaining life of the overflow brick.

[0072] like Figure 5 As shown, in a preferred embodiment of this application, step S2 specifically includes the following steps:

[0073] S201, based on the maximum allowable creep deformation d of the overflow brick t The creep deformation rate K of the overflow brick and the corresponding working time t i The measured deformation d of the overflow brick i The remaining working life t of the overflow brick was calculated. s :

[0074] t s＝ (d t -d i ) / K.

[0075] The maximum allowable creep deformation dt of the overflow brick is obtained by dismantling a scrapped muffle furnace from the production line and measuring and determining the maximum allowable creep deformation of the overflow brick. Creep deformation is a permanent and irreversible deformation; therefore, the deformation of the middle part of the overflow brick measured after cold dismantling is the maximum allowable creep deformation of the overflow brick under working conditions. The maximum allowable creep deformation dt of the overflow brick is... t The diameter is 30mm to 50mm.

[0076] Under stable production conditions, the creep deformation rate of the overflow brick is approximately constant. Although the deformation rate can be calculated using a formula, the above embodiment uses deformation data from field tests for fitting, resulting in a more accurate creep deformation rate and thus a more precise calculation of the overflow brick's remaining lifespan. Based on the calculated remaining lifespan of the overflow brick, the company can allocate production resources in advance and rationally plan new production lines, thereby ensuring a stable supply to downstream manufacturers.

[0077] like Figure 6 As shown, in a preferred embodiment of this application, step S3 specifically includes the following steps:

[0078] S301. When the calculated remaining working life of the overflow brick does not meet the design requirements, the working temperature of the overflow brick is adjusted multiple times: T2 = T1 – T0, where T1 is the original working temperature of the overflow brick, T0 is the working temperature adjustment value of the overflow brick, and T2 is the working temperature of the overflow brick after adjustment.

[0079] S302. Based on the adjusted working temperature of the overflow brick and the creep deformation rate formula of the overflow brick, calculate the deformation rate K and remaining life t of the overflow brick multiple times.S Considering the overall production line's process adjustment capabilities and the remaining lifespan of the overflow bricks, a suitable working temperature adjustment value T0 is selected.

[0080] S303. Adjust the production equipment process, lower the working temperature of the overflow brick to T0 degree, and repeat steps S101 to S102 and S201 to calculate the creep deformation rate and remaining working life of the adjusted overflow brick.

[0081] It should be noted that in actual production, the process temperature of the equipment is a temperature range that can be adjusted within a certain range. When the creep deformation rate of the overflow brick is too high, the remaining service life (t) will be reduced. S1 When the creep rate is lower than expected, referring to the following formula, the creep deformation rate is related to the operating temperature. In this embodiment, the creep deformation rate of the overflow brick is changed by appropriately adjusting the operating temperature of the overflow brick:

[0082]

[0083] From the above formula, it can be seen that when the operating temperature T decreases, Q / T increases, and e -Q / T As the temperature decreases, the creep rate K also decreases. Therefore, when the process temperature T2 < T1, the corresponding creep rate K2 < K1, and the remaining life of the overflow brick is extended accordingly.

[0084] Assuming T2 = T1 – T0, the creep deformation rate K and remaining life t of the overflow brick are calculated using the above formula. S Adjust the value of T0 and calculate the overflow brick deformation rate K and remaining life t multiple times. S A reasonable T0 value is selected based on the overall production line's process adjustment capabilities and the remaining lifespan of the overflow bricks.

[0085] In this embodiment, after obtaining a reasonable T0 value through iteration, the production equipment is adjusted to lower the T0 temperature of the overflow brick. Then, the creep deformation d of the overflow brick is measured multiple times using an overflow brick deformation measuring device. i Calculate the creep deformation rate and remaining working life of the overflow brick. At this time, the remaining working life of the overflow brick after adjustment is greater than the remaining working life of the overflow brick before adjustment.

[0086] In this embodiment, when the calculated remaining working life of the overflow brick does not meet the design requirements, the working life of both the overflow brick and the molding equipment can be extended by specifically adjusting the process temperature of the overflow brick during production. This reduces production costs and improves product competitiveness. It should be noted that the effective working temperature of the overflow brick is within a certain range, specifically T, which is between 1373K and 1573K, and cannot be arbitrarily lowered. Lowering it beyond a certain range will result in a decrease in product quality and yield, and may even prevent the production of qualified products.

[0087] like Figure 7 As shown, in another preferred embodiment of this application, step S1 specifically includes the following steps:

[0088] S111. During the overflow brick design phase, based on the width of the glass plate products to be produced and the overflow forming design theory, the relevant parameters of the overflow brick are initially determined, including the height value H1 and the support span L1. The overflow brick height H1 is between 700mm and 1500mm, and the overflow brick support span L1 is between 2000mm and 4000mm.

[0089] S112. Select the material for making the overflow brick, process creep specimens, and then conduct high-temperature creep tests on the specimens. Combine the creep law formula of the overflow brick material with the data obtained from the tests, process and fit the data to obtain the relevant creep parameters A, n, Q of the overflow brick material, and the material density ρ of the overflow brick:

[0090]

[0091] in, Let σ be the creep strain rate, σ be the stress, n be the stress exponent between 1 and 5, T be the operating temperature, Q = ΔH / R, R be the universal constant, and ΔH be the creep activation energy. The material density ρ of the overflow brick is 3.0 g / cm³. 3 ~5.0g / cm 3 ;

[0092] S113. Based on the formula of the glass product to be produced, test the viscosity-temperature curve of the glass, and then determine the working temperature T of the overflow brick according to the viscosity-temperature curve of the glass and the overflow forming theory. The working temperature T of the overflow brick is 1373K to 1573K.

[0093] S114. Using the parameter values ​​obtained in steps S111 to S113, calculate the creep rate K of the overflow brick according to the creep deformation rate formula:

[0094]

[0095] Wherein, H is the height of the overflow brick, which is between 500mm and 1200mm; L is the support span between the two end support points when the overflow brick is installed, which is between 2000mm and 4000mm; parameter C1 is a coefficient related to the height, which is between 3.0 and 3.25; parameter C2 is a coefficient related to the span, which is between 0.31 and 0.42.

[0096] In this embodiment, after obtaining the parameter values ​​in steps S111 to S113, the creep rate K of the overflow brick is calculated according to the creep deformation rate formula of the overflow brick. This eliminates the cost of setting up a deformation measurement device for the overflow brick. Under the premise of meeting the design requirements, it is a low-cost technical means.

[0097] like Figure 8 As shown, in a preferred embodiment of this application, step S2 specifically includes the following steps:

[0098] S211, Based on the maximum allowable creep deformation d of the overflow brick t The creep deformation rate K of the overflow brick is calculated, and the remaining working life t of the overflow brick is obtained. s :

[0099] t s＝ (d t -d0) / K,

[0100] The maximum allowable creep deformation dt of the overflow brick is obtained by dismantling a scrapped muffle furnace from the production line, measuring and determining the maximum allowable creep deformation of the overflow brick. Creep deformation is a permanent and irreversible deformation. Therefore, the deformation of the middle part of the overflow brick measured under cold dismantling is the maximum allowable creep deformation under its working state. d0 is the initial elastic deformation of the overflow brick under cold state after installation, which is obtained by calculation or simulation methods based on elasticity theory.

[0101] like Figure 9 As shown, in a preferred embodiment of this application, step S3 specifically includes the following steps:

[0102] S311. When the calculated remaining working life of the overflow brick does not meet the design requirements, the height value H2 and the support span L2 of the overflow brick are adjusted multiple times to obtain the corrected value.

[0103] S312. With all other parameter values ​​remaining unchanged, based on the height H2 of the overflow brick and the support span L2 after multiple corrections, recalculate the creep deformation rate K2 and the remaining working life t of the adjusted overflow brick. S2 Until the creep deformation rate K2 and remaining working life t of the adjusted overflow brick are determined. S2 Meets design requirements;

[0104] S313. Adjust the design parameters of the production equipment. After adopting the corrected overflow brick height value H2 and support span L2, repeat steps S111 to S114 and step S211 to calculate the adjusted overflow brick creep deformation rate and remaining working life.

[0105] In this embodiment, the working life t of the overflow brick was calculated at the initial design stage. S1If the results are unsatisfactory, the overflow brick dimensions are optimized to obtain a corrected overflow brick height of H2 and a support span of L2. The creep deformation rate K and service life t of the adjusted overflow brick are then recalculated. S Next, the creep deformation rate K and service life t of the adjusted overflow brick were evaluated. S If the design requirements are not met, the overflow brick height H2 and support span L2 are adjusted again, and the creep deformation rate and remaining working life of the overflow brick are recalculated until the design requirements are met. Since this embodiment can obtain optimized design parameters at the beginning of the design process so that the creep deformation rate and remaining working life of the overflow brick meet the design requirements, a better creep deformation rate and remaining working life of the overflow brick can be quickly obtained before production, which reduces the cost of later optimization and improves the optimization efficiency.

[0106] As can be seen, this embodiment optimizes the design by adjusting the dimensions of the overflow brick, especially the height value H2 and support span L2 of the corrected overflow brick, thereby achieving a lower creep deformation rate and a longer remaining working life. This allows the molding equipment to have a longer working life, thereby reducing the cost of glass plate products and effectively improving the competitiveness of the products.

[0107] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for predicting the lifespan of overflow bricks, characterized in that, Including the following steps: S1. The creep deformation rate K of the overflow brick under the corresponding working conditions is obtained by periodically measuring the overflow brick deformation using an overflow brick deformation measuring device, or by calculating it according to the principles of material mechanics and creep theory. The corresponding working conditions include the working temperature of the overflow brick, the height of the overflow brick, and the support span. S2, based on the maximum allowable creep deformation d of the overflow brick t The remaining working life of the overflow brick is calculated from the creep deformation rate K of the overflow brick and the known deformation amount of the overflow brick. Step S1 specifically includes the following steps: S111. During the overflow brick design phase, based on the width of the glass plate products to be produced and the overflow forming design theory, the relevant parameters of the overflow brick are initially determined, including the height value H1 and the support span L1. S112. Select the material for making the overflow brick, process creep specimens, and then conduct high-temperature creep tests on the specimens. Combine the creep law formula of the overflow brick material with the data obtained from the tests, process and fit the data to obtain the relevant creep parameters A, n, Q of the overflow brick material, and the material density ρ of the overflow brick: in, Let σ be the creep strain rate, σ be the stress, n be the stress exponent between 1 and 5, T be the operating temperature, Q = ΔH / R, R be the universal constant, and ΔH be the creep activation energy. The material density ρ of the overflow brick is 3.0 g / cm³. 3 ~5.0g / cm 3 ; S113. Based on the formula of the glass product to be produced, test the viscosity-temperature curve of the glass, and then determine the working temperature T of the overflow brick according to the viscosity-temperature curve of the glass and the overflow forming theory. The working temperature T of the overflow brick is 1373K~1573K. S114. Using the parameter values ​​obtained in steps S111 to S113, calculate the creep rate K of the overflow brick according to the creep deformation rate formula: Wherein, H is the height of the overflow brick, which is between 500mm and 1200mm; L is the support span between the two end support points when the overflow brick is installed, which is between 2000mm and 4000mm; parameter C1 is a coefficient related to the height, which is between 3.0 and 3.25; parameter C2 is a coefficient related to the span, which is between 0.31 and 0.

42.

2. The method for predicting the lifespan of overflow bricks according to claim 1, characterized in that, It also includes the following steps: S3. When the calculated remaining working life of the overflow brick does not meet the design requirements, correct the corresponding operating conditions and repeat steps S1 to S2 until the calculated remaining working life of the overflow brick meets the design requirements.

3. The method for predicting the lifespan of overflow bricks according to claim 1, characterized in that, The process also includes the step S2, where the maximum allowable creep deformation d of the overflow brick is determined. t The maximum allowable creep deformation of the overflow bricks was determined by dismantling the scrapped muffle furnace of the production line and measuring and determining it.

4. The method for predicting the lifespan of overflow bricks according to claim 1, characterized in that, The process also includes the step S2, where the maximum allowable creep deformation d of the overflow brick is determined. t The diameter is 30mm to 50mm.

5. The method for predicting the lifespan of overflow bricks according to claim 2, characterized in that, Step S1 specifically includes the following steps: S101. In actual production, the deformation of the overflow brick is periodically measured using an overflow brick deformation measuring device to obtain several corresponding working times t. i and overflow brick deformation d i ; S102, the several corresponding working times t i and overflow brick deformation d i Linear fitting was performed to obtain the creep deformation rate K of the overflow brick in actual production.

6. The method for predicting the lifespan of overflow bricks according to claim 5, characterized in that, Step S2 specifically includes the following steps: S201, based on the maximum allowable creep deformation d of the overflow brick t The creep deformation rate K of the overflow brick and the corresponding working time t i The measured deformation d of the overflow brick i The remaining working life t of the overflow brick was calculated. s : t s =(d t -d i ) / K。 7. The method for predicting the lifespan of overflow bricks according to claim 1, characterized in that, Step S2 specifically includes the following steps: S211, Based on the maximum allowable creep deformation d of the overflow brick t The creep deformation rate K of the overflow brick is calculated, and the remaining working life t of the overflow brick is obtained. s : t s =(d t -d0) / K, Wherein, d0 is the initial elastic deformation of the overflow brick in the cold state after installation, which is obtained by calculation or simulation methods based on elasticity theory.

8. The method for predicting the lifespan of overflow bricks according to claim 2, characterized in that, Step S3 specifically includes the following steps: S301. When the calculated remaining working life of the overflow brick does not meet the design requirements, the working temperature of the overflow brick is adjusted multiple times: T2 = T1 – T0, where T1 is the original working temperature of the overflow brick, T0 is the working temperature adjustment value of the overflow brick, and T2 is the working temperature of the overflow brick after adjustment. S302. Based on the adjusted working temperature of the overflow brick and the creep deformation rate formula of the overflow brick, calculate the deformation rate K and remaining life t of the overflow brick multiple times. S Considering the overall production line's process adjustment capabilities and the remaining lifespan of the overflow bricks, a suitable working temperature adjustment value T0 is selected. S303. Adjust the production equipment process, lower the working temperature of the overflow brick to T0 degree, and repeat steps S1 to S2 to calculate the creep deformation rate and remaining working life of the adjusted overflow brick.

9. The method for predicting the lifespan of overflow bricks according to claim 2, characterized in that, Step S3 specifically includes the following steps: S311. When the calculated remaining working life of the overflow brick does not meet the design requirements, the height value H2 and the support span L2 of the overflow brick are adjusted multiple times to obtain the corrected value. S312. With all other parameter values ​​remaining unchanged, based on the height H2 of the overflow brick and the support span L2 after multiple corrections, recalculate the creep deformation rate K2 and the remaining working life t of the adjusted overflow brick. S2 Until the creep deformation rate K2 and remaining working life t of the adjusted overflow brick are determined. S2 Meets design requirements; S313. Adjust the design parameters of the production equipment. After adopting the corrected overflow brick height value H2 and support span L2, repeat steps S1 to S2 to calculate the adjusted overflow brick creep deformation rate and remaining working life.

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