HIGH-STRENGTH, CREEP-RESISTANT OVERFLOW TILE AND METHOD FOR ITS DESIGN

Abstract

Several embodiments of the present description relate to a high-strength, creep-resistant overflow tile and a method for its design, which belongs to the field of glass substrate manufacturing technology. Using an overflow tile established in glass substrate manufacturing as a reference overflow tile, the design parameters of the reference overflow tile, the design parameters of the target overflow tile, and the creep stress exponent of the overflow tile are determined. A similarity relationship between the reference overflow tile and the target overflow tile is established, and a system of equations is formulated with respect to the first and second heights of the inlet cross-section of the target overflow tile.Using the similarity relationship and known parameters, the equivalent thickness, equivalent base height, and equivalent height of the reference overflow tile and the overflow tile to be designed are determined. Subsequently, the length of the bearing surface of the overflow tile to be designed and the maximum cylinder pressure of the clamping cylinder are calculated using the known parameters, thus completing the design of the high-strength, creep-resistant overflow tile. The application of this design method enables effective optimization with regard to the structural strength of the overflow tile, the clamping cylinder method, and the long-term creep behavior, thereby ensuring the quality stability of the forming guide plate.

Description

High-strength low-creep isopipe and design method thereof TECHNICAL FIELD

[0001] The present application relates to the technical field of glass substrate manufacturing, in particular to a high-strength low-creep isopipe and a design method thereof. BACKGROUND

[0002] In the field of precision manufacturing of TFT-LCD (Thin Film Transistor-Liquid Crystal Display) flat panel displays, the production of glass substrates relies on the precise control of the isopipe down-draw technology, which involves transporting molten glass from a glass melting furnace to a molten isopipe down-draw forming device to produce glass substrates that meet strict standards. In this process, ensuring that the glass substrates have uniform thickness, low residual stress, and precise warping control is a key challenge in the manufacturing process.

[0003] As a core component of the forming device, the structural design of the isopipe is particularly critical. With the evolution of product generations and the increase in production volume, higher optimization requirements are placed on the structure of the isopipe system, especially the structural design of the isopipe, to ensure the stability of the glass guide plate.

[0004] When evaluating the performance of the isopipe, its chemical composition, microstructure, mechanical properties, thermal properties, and high-temperature performance must be considered comprehensively. Among them, the high-temperature bending strength and creep performance are important indicators for measuring its performance. High-temperature bending strength reflects the material's ability to resist bending stress in a high-temperature environment, while high-temperature creep describes the change in strain over time under constant stress.

[0005] In order to precisely control the thickness of the glass substrate, various complex factors affecting the thickness distribution of the glass substrate must be considered comprehensively when designing the isopipe. These factors include, but are not limited to, self-weight stress, gravity of the glass liquid, and bending stress of the clamping cylinder. At the same time, given the high-temperature conditions of the working environment (about 1207℃), the creep rate under actual environmental conditions must be accurately calculated to accurately predict and control the impact of creep on the forming thickness. In this process, reasonable clamping cylinder pressure is the basis for effectively controlling the creep amount, thereby ensuring the precision and stability of the glass substrate.

[0006] Therefore, how to design an isopipe with high strength and low creep performance, while ensuring that the clamping cylinder pressure is within a reasonable range, to meet the high-precision requirements of glass substrates in the manufacturing of TFT-LCD (Thin Film Transistor-Liquid Crystal Display) flat panel displays, has become an important technical problem that needs to be solved by the current technical personnel in the field. SUMMARY

[0007] The application aims to provide a high-strength low-creep overflow brick and a design method thereof to overcome the problem of strength reduction and increased creep of overflow bricks in high-temperature environment in the prior art.

[0008] The application solves the above technical problems by the following technical scheme:

[0009] The design method of the high-strength low-creep overflow brick comprises the following steps:

[0010] Step one, selecting a mature glass substrate manufacturing overflow brick as a reference overflow brick, obtaining the design parameters of the reference overflow brick, and determining the design parameters of the design overflow brick;

[0011] Step two, calculating the proximal crotch height and the distal crotch height of the reference overflow brick according to the design parameters of the reference overflow brick obtained in step one;

[0012] Step three, calculating the first average crotch height and the second average crotch height of the reference overflow brick according to the parameters obtained in step one and the parameters obtained in step two;

[0013] Step four, establishing a similarity relationship of the reference overflow brick and the design overflow brick, the similarity relationship comprising an overflow slot wall thickness similarity relationship, a first average crotch height similarity relationship and a second average crotch height similarity relationship;

[0014] Step five, calculating the overflow slot wall thickness of the design overflow brick from the overflow slot wall thickness similarity relationship;

[0015] Step six, establishing an equation group about the first height of the inlet cross section and the second height of the inlet cross section of the design overflow brick according to the parameters obtained in steps one to three and step five and the similarity relationship in step four, solving the equation group, and calculating the first height of the inlet cross section and the second height of the inlet cross section ;

[0016] Step seven, calculating the strength parameters of the reference overflow brick and the design overflow brick according to the parameters obtained in the above steps;

[0017] Step eight, calculating the support surface length and the maximum cylinder pressure of the clamping cylinder of the design overflow brick according to the parameters obtained in step seven, and completing the design of the high-strength low-creep overflow brick.

[0018] Preferably, in step two, the proximal crotch height For:

[0019]

[0020] the reference runner's far end crotch height For:

[0021]

[0022] wherein, the reference runner's inlet cross section first height; the reference runner's runner face width, the reference runner's runner lip thickness; the reference runner's runner bevel angle, the reference runner's runner tip chamfer radius; the reference runner's inlet cross section second height; the reference runner's weir angle; the reference runner's inlet cross section runner lip depth.

[0023] Preferably, in step three, the reference runner's first average crotch height For:

[0024]

[0025] the reference runner's second average crotch height For:

[0026] .

[0027] Preferably, in step four, the runner lip thickness similarity relationship is:

[0028]

[0029] the first average crotch height similarity relationship is:

[0030]

[0031] the second average crotch height similarity relationship is:

[0032]

[0033] wherein, the design runner's runner lip thickness; the design runner's runner lip thickness; the design runner's first average crotch height; the design runner's second average crotch height; The second average crotch height of the overflow brick for design The corresponding crotch width The second average crotch height of the overflow brick for reference The corresponding crotch width; n is the creep stress index of the overflow brick The overflow face width of the overflow brick for design The overflow face width of the overflow brick for reference The inlet cross-section overflow groove depth of the overflow brick for reference The inlet cross-section overflow groove depth of the overflow brick for design

[0034] In step five, the overflow groove wall thickness of the overflow brick for design is preferably :

[0035] .

[0036] In step six, the equation group of the first height of the inlet cross-section and the second height of the inlet cross-section of the overflow brick for design is preferably

[0037] Equation one, the proximal crotch height of the overflow brick for design is specifically :

[0038]

[0039] Equation two, the distal crotch height of the overflow brick for design is specifically :

[0040]

[0041] Equation three, the first average crotch height of the overflow brick for design is specifically :

[0042]

[0043] Equation four, the second average crotch height of the overflow brick for design is specifically :

[0044]

[0045] Equation five, the second average crotch height of the overflow brick for design is specifically The corresponding crotch width :

[0046]

[0047] Equation six, the first average crotch height similarity relationship according to step four, lists the first average crotch height of the design overflow brick The equation is as follows:

[0048]

[0049] Equation seven, the second average crotch height similarity relationship according to step four, lists the second average crotch height of the design overflow brick The equation is as follows:

[0050]

[0051] In the equation, R is the overflow brick tip chamfer radius of the design overflow brick; is the overflow slope angle of the design overflow brick; is the overflow weir inclination angle of the design overflow brick.

[0052] Preferably, in step seven, the strength parameters of the reference overflow brick and the design overflow brick are obtained, and the strength parameters are as follows:

[0053] The strength parameters include equivalent thickness, equivalent height bottom value, and equivalent height;

[0054] The equivalent thickness of the reference overflow brick and the design overflow brick is as follows:

[0055]

[0056]

[0057] In the equation, is the equivalent thickness of the reference overflow brick, is the equivalent thickness of the design overflow brick;

[0058] The equivalent height bottom value of the reference overflow brick and the design overflow brick is as follows:

[0059]

[0060]

[0061] In the equation, is the equivalent height bottom value of the reference overflow brick, is the equivalent height bottom value of the design overflow brick;

[0062] The equivalent height of the design overflow brick is as follows:

[0063]

[0064] The equivalent height of the reference overflow brick is as follows:​ For:

[0065]

[0066] wherein, is the equivalent thickness of the design overflow brick; is the equivalent thickness of the reference overflow brick; is the equivalent height bottom value of the design overflow brick; is the equivalent height bottom value of the reference overflow brick; is the equivalent height of the design overflow brick; is the equivalent height of the reference overflow brick; is the distal crotch height of the reference overflow brick; is the material density of the overflow brick.

[0067] Preferably, in step eight, the support surface length of the design overflow brick is is:

[0068]

[0069] wherein, is the overflow brick support surface length of the reference overflow brick.

[0070] Preferably, in step eight, the maximum cylinder pressure of the clamping cylinder of the design overflow brick is is:

[0071]

[0072] wherein, is the equivalent height of the design overflow brick, is the equivalent thickness of the design overflow brick; is the overflow surface width of the design overflow brick.

[0073] A high-strength low-creep overflow brick is designed and manufactured based on the design method of the high-strength low-creep overflow brick.

[0074] Compared with the prior art, the positive progress effect of the present application is that:

[0075] The application provides a design method of high-strength low-creep overflow bricks, which takes mature overflow bricks for manufacturing glass substrates as a design reference, obtains design parameters of a reference overflow brick, design parameters of a target design overflow brick and a creep stress index, establishes a similarity relationship between the reference overflow brick and the design overflow brick, and constructs an equation group about a first height and a second height of an inlet section of the design overflow brick; equivalent thickness, equivalent height and equivalent height bottom value of the reference overflow brick and the design overflow brick are obtained by using the similarity relationship and the known parameters; then, a support surface length of the design overflow brick and a maximum cylinder pressure of a clamping cylinder are obtained according to the known parameters, and the design of the high-strength low-creep overflow brick is completed; the design method can realize effective support of overflow brick structural strength, clamping cylinder process and long-time creep design optimization, and guarantee the stability of the quality of the formed leading plate. BRIEF DESCRIPTION OF DRAWINGS

[0076] Fig. 1 is a structural schematic diagram of an overflow system according to the application;

[0077] Fig. 2 is a structural schematic diagram of overflow down-draw glass according to the application;

[0078] Fig. 3 is a structural schematic diagram of overflow brick support strength according to the application;

[0079] Fig. 4 is a structural schematic diagram of overflow brick clamping cylinder stress according to the application;

[0080] Fig. 5 is a structural schematic diagram of overflow brick structure details according to the application;

[0081] Fig. 6 is a structural schematic diagram of overflow brick volume flow distribution and volume differential flow distribution according to the application; wherein, Fig. (a) is the volume flow distribution, and Fig. (b) is the volume differential flow distribution;

[0082] Fig. 7 is a structural schematic diagram of overflow brick before and after creep according to the application; wherein, Fig. (a) is the structure before creep, and Fig. (b) is the structure after creep.

[0083] wherein, 1 is an overflow brick, 2 is an overflow channel, 3 is a glass liquid feeding device, 4 is a root of the overflow brick, 5 is a leading plate, 6 is a formed glass substrate, 7 is a down-draw direction of the glass substrate, is a width of the glass substrate specification, is a width of the leading plate of the glass substrate; B is a wall thickness of an overflow channel of the design overflow brick, W is a width of an overflow surface of the design overflow brick, w is a width of the overflow channel of the design overflow brick, h is a depth of the inlet section of the overflow channel of the design overflow brick, R is a chamfer radius of the overflow brick tip of the design overflow brick, ϕ is an overflow weir inclination angle of the design overflow brick, θ is an overflow slope angle of the design overflow brick, h1 is a first height of the inlet section of the design overflow brick, h2 is a second height of the inlet section of the design overflow brick, H O is a far-end crotch height of the design overflow brick, H IL is the total length of the overflow brick; and l is the length of the support surface of the overflow brick. Embodiments of the present application

[0084] To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application.

[0085] Referring to FIG. 1, the overflow system is composed of an overflow brick 1 and a glass liquid supply device 3. The overflow brick 1 is provided with an overflow channel 2. The bottom of the overflow brick 1 is an overflow brick root 4. In the process of manufacturing a glass substrate by means of molten overflow, the glass liquid melted by a glass melting furnace is supplied to the glass liquid supply device 3 in the molten overflow forming device in the forming process, and flows along the overflow channel 2 through the overflow brick 1 on both sides, and forms the glass substrate from the overflow brick root 4.

[0086] In the process of advancing from the proximal end to the distal end of the overflow channel, the glass melt is pushed by the mass force and pressure in the running direction, overcomes the laminar viscous resistance, and flows downward from the overflow weir. The fluid dynamics equation based on the above principle integrates the effects of the above forces, and is the basis for the design of the overflow channel. In the vertical plane of the overflow, the mass force and pressure are large enough, and the viscosity is relatively low, the influence of the lateral surface tension is small, and there is almost no lateral contraction; on the inclined plane, the component force of the mass force and pressure along the inclined plane is significantly smaller, and the viscosity gradually increases, the effect of the lateral surface tension is highlighted, and obvious lateral contraction is generated. Therefore, the overflow brick is provided with a platinum material drainage plate 5 at each of the proximal end and the distal end of the inclined plane, which is used to partially resist the lateral contraction of the glass.

[0087] Referring to FIG. 2, the drainage plate serves as the forming basis of the glass substrate. In the process of down-drawing the glass substrate, the formed glass substrate 6 runs downward along the down-drawing direction 7 of the glass substrate. In the figure is the width of the glass substrate, is the width of the glass substrate drainage plate.

[0088] Referring to FIG. 3, the force of the overflow brick support part and the gravity F (overflow brick and glass gravity) need to be balanced to ensure the support strength. Referring to FIG. 4, the pressure P of the overflow brick clamping cylinder needs to resist the deformation of the overflow brick caused by the gravity F (overflow brick and glass gravity) as much as possible. Referring to FIG. 5 and FIG. 7, the overflow brick bends downward after long-term creep, causing the glass substrate to become thicker in the middle and thinner on both sides, which seriously affects the stability of the lead plate. When designing the overflow brick, various complex factors that affect the thickness distribution of the glass substrate need to be considered, and the production margin needs to be increased from the design to ensure that the thermal stability and stress of the overflow brick are within the safe range of the ultimate bending strength. The bending stress of the overflow brick includes the self-weight stress, the glass liquid gravity, the traction feedback stress and the bending stress of the clamping cylinder. Among them, the traction stress can be ignored, the average temperature of the working environment is about 1207℃, and the actual creep rate under the muffle environment needs to be calculated to accurately estimate the creep amount of the overflow brick. At the same time, in order to facilitate accurate calculation, a series of creep rates under different environmental temperatures, applied stresses and holding times are measured, and the influence of the overflow brick creep on the forming thickness can be verified through overflow simulation or overflow brick design flow analysis; the overflow brick creep causes the glass substrate to become thinner at the near end and the far end and thicker in the middle. Therefore, the bending strength needs to be considered first in the design of the overflow brick structure, and reasonable clamping cylinder pressure is the basis for effectively controlling the creep amount. And the overflow brick structure design considers the overflow brick creep stress factor , so that the strength and creep of the designed overflow brick are higher than those of the reference overflow brick, and the overflow brick creep amount is controlled through the cylinder pressure process.

[0089] Referring to FIG. 6, it is a schematic diagram of the volume flow distribution and the volume differential flow distribution of the overflow brick. In FIG. (a), the volume flow distribution is approximately uniform from the near end to the far end before creep (approximately downward inclined straight line); after creep, the flow rate of the near end and the far end decreases slowly, and the curve tilts upward, indicating that the amount of glass flowing out decreases compared with before creep, while the flow rate of the middle decreases rapidly, and the curve tilts downward, indicating that the amount of glass flowing out increases compared with before creep. FIG. (b) is the volume differential flow distribution, which is the derivative curve of the curve in FIG. (a), and its size is proportional to the thickness distribution of the glass substrate. It can be seen that the creep causes the glass substrate to become thicker in the middle and thinner on both sides. The above seriously affects the forming quality of the glass substrate and the stability of the lead plate.

[0090] The present application provides a high-strength low-creep overflow brick design method, comprising the following steps,

[0091] A mature glass substrate manufacturing overflow brick is selected as a design reference to obtain the design parameters of the reference overflow brick and the design overflow brick, wherein

[0092] The design parameters of the reference overflow brick include the overflow slot width of the reference overflow brick , the overflow slot height of the reference overflow brick the overflow launder wall thickness of the reference overflow brick the first height of the inlet cross section of the reference overflow brick the second height of the inlet cross section of the reference overflow brick the overflow weir angle of the reference overflow brick the overflow slope angle of the reference overflow brick the brick tip chamfer radius of the reference overflow brick the overflow face width of the reference overflow brick the support face length of the reference overflow brick .

[0093] the design parameters of the design overflow brick include: the overflow launder width of the design overflow brick the overflow launder depth of the design overflow brick the overflow weir angle of the design overflow brick the overflow slope angle of the design overflow brick the brick tip chamfer radius of the design overflow brick the overflow face width of the design overflow brick the creep stress index of the overflow brick ;

[0094] According to the obtained parameters and the creep stress index of the overflow brick, the overflow launder wall thickness similarity relationship, the first average crotch height similarity relationship and the second average crotch height similarity relationship of the overflow brick are established, and the overflow launder wall thickness of the design overflow brick, the first height of the inlet cross section of the design overflow brick and the second height of the inlet cross section are calculated;

[0095] At the same time, the support face support length similarity relationship of the overflow brick is established, the strength parameters of the reference overflow brick and the design overflow brick are calculated according to the known parameters, the strength parameters include the equivalent thickness, the equivalent height bottom value and the equivalent height, and the support face support length of the design overflow brick and the maximum cylinder pressure of the overflow brick bending-free clamping cylinder are further calculated; the overflow brick clamping cylinder pressure process is established, and the shape structure design of the high-strength low-creep overflow brick is completed.

[0096] Specifically, the specific formula of the overflow launder wall thickness similarity relationship of the overflow brick is:

[0097]

[0098] wherein, and are the overflow launder wall thicknesses of the design and reference overflow bricks respectively; and are the overflow face widths of the design and reference overflow bricks respectively; and are the inlet cross section overflow launder depths of the design and reference overflow bricks respectively, is the creep stress exponent of the overflow brick.

[0099] Specifically, the specific formula of the first average crotch height similarity relationship of the overflow brick is:

[0100]

[0101] wherein, and are the design and reference first average crotch heights of the overflow brick, respectively. and are the design and reference overflow channel widths of the overflow brick, respectively. is the design first average crotch height of the overflow brick is the corresponding crotch width, i.e. the thickness of the design overflow brick, which is formed by adding the wall thickness of the design overflow channel to the width of the design overflow channel.

[0102] Specifically, the specific formula of the second average crotch height similarity relationship of the overflow brick is:

[0103]

[0104] wherein, and are the design and reference second average crotch heights of the overflow brick, respectively. is the design second average crotch height of the overflow brick is the corresponding crotch width. is the reference second average crotch height of the overflow brick is the corresponding crotch width.

[0105] Specifically, the specific formula of the first average crotch height of the overflow brick is:

[0106]

[0107]

[0108] wherein, and are the design and reference proximal crotch heights of the overflow brick, respectively. and are the design and reference distal crotch heights of the overflow brick, respectively.

[0109] Specifically, the specific formula of the second average crotch height of the overflow brick is:

[0110]

[0111]

[0112] wherein, and Hdand Hrare the first height of the design and reference overflow brick inlet cross section, respectively.

[0113] In particular, the specific formula for the proximal end crotch height of the overflow brick is:

[0114]

[0115]

[0116] wherein, and Hdand Hrare the second height of the design and reference overflow brick inlet cross section, respectively; and and and and

[0117] In particular, the specific formula for the distal end crotch height of the overflow brick is:

[0118]

[0119]

[0120] wherein, and Hdand Hrare the overflow slot depth of the design and reference overflow brick, respectively; and and

[0121] In particular, the second average crotch height of the design overflow brick corresponding crotch width and the second average crotch height of the reference overflow brick corresponding crotch width are given by:

[0122]

[0123]

[0124] In particular, the specific formula for the support surface length similarity relationship of the overflow brick is:

[0125]

[0126] wherein, and Hdand Hrare the support surface length of the design and reference overflow brick, respectively; and and

[0127] In particular, the specific formula of the equivalent height of the overflow brick is:

[0128]

[0129]

[0130] wherein, and are the design and reference overflow brick equivalent thicknesses, respectively; and are the design and reference overflow brick equivalent height bottom values, respectively; is the material density of the overflow brick.

[0131] In particular, the specific formula of the equivalent height bottom value of the overflow brick is:

[0132]

[0133]

[0134] In particular, the specific formula of the equivalent thickness of the overflow brick is:

[0135]

[0136]

[0137] In particular, the specific formula of the maximum cylinder pressure of the overflow brick without bending clamping cylinder is:

[0138]

[0139] wherein, is the design overflow brick without bending clamping cylinder maximum cylinder pressure, unit , is the material density of the overflow brick.

[0140] In particular, before the initial use of the overflow brick without creep, the deformation of the overflow brick is in the order of μm, and the initial value of the clamping cylinder pressure before the lead plate (heating and wetting) is about , and the clamping cylinder pressure after the lead plate is recommended to be ; after the creep of the overflow brick continues to increase, the clamping force of the cylinder should not be increased by more than .

[0141] Example 1

[0142] I. Obtain the reference overflow brick design parameters: the overflow groove width of the reference overflow brick , the overflow groove height of the reference overflow brick , and the overflow groove wall thickness of the reference overflow brick reference overflow brick reference overflow brick reference overflow brick reference overflow brick reference overflow brick reference overflow brick reference overflow brick .

[0143] II. Obtain the design parameters of the design overflow brick: the overflow groove width of the design overflow brick and the overflow groove depth of the design overflow brick design overflow brick design overflow brick design overflow brick design overflow brick .

[0144] III. Calculate the overflow groove wall thickness of the design overflow brick:

[0145]

[0146] wherein, and are the overflow groove wall thicknesses of the design and reference overflow bricks, respectively; and are the overflow face widths of the design and reference overflow bricks, respectively; and are the overflow groove depths of the design and reference overflow bricks at the inlet cross section, respectively, is the creep stress index of the overflow brick.

[0147] Creep stress index of overflow brick is measured by creep test of the overflow brick, specifically:

[0148] For an overflow brick made of a specific material, under the condition of temperature T, a fixed applied stress is applied, and the creep rate is measured. The creep rate obeys the power law expression.

[0149]

[0150] wherein, is the bending creep rate, in mm / mm, for the creep rate, in mm / mm / hr, t for time, A is a coefficient related to the material of the overflow brick, related to stress and temperature, for the creep stress exponent of the overflow brick, E is the activation energy, R is the gas constant, both of which can be determined by experiments. DR refers to the amount related to the bending deformation, the bending creep rate is the equivalent creep rate calculated by the bending deformation amount , the creep rate specifies a specific measurement temperature and applied stress;

[0151] Four, calculate the design overflow brick shape structure entrance section first height , the entrance section second height ;

[0152] S1, calculate the proximal end of the overflow brick crotch height (where , unknown parameters) are:

[0153]

[0154]

[0155] where, and the design and reference overflow brick overflow groove width respectively; and the design and reference overflow brick entrance section first height respectively; and the design and reference overflow brick entrance section second height respectively; and the design and reference overflow brick overflow slope angle respectively; and the design and reference overflow brick corner radius of the brick tip respectively.

[0156] S2, calculate the distal end of the overflow brick crotch height (where , unknown parameters) are:

[0157]

[0158]

[0159] where, and the design and reference overflow brick overflow groove depth respectively; and the design and reference overflow brick overflow weir inclination angle respectively.

[0160] S3, calculate the first average crotch height of the overflow brick (wherein , are unknown parameters):

[0161]

[0162]

[0163] S4, calculate the second average crotch height of the overflow brick (wherein , are unknown parameters):

[0164]

[0165]

[0166] S5, calculate the crotch width corresponding to the second average crotch height of the overflow brick (wherein , are unknown parameters):

[0167]

[0168]

[0169] S6, calculate the first average crotch height of the overflow brick (wherein , are unknown parameters):

[0170]

[0171] S7, calculate the second average crotch height of the overflow brick (wherein , are unknown parameters):

[0172]

[0173] S8, solve the equation group by combining the formulas S1-S7 to obtain the first height of the design overflow brick inlet section and the second height of the inlet section .

[0174] Five, calculate the length of the support surface of the design overflow brick

[0175] S1, calculate the equivalent thickness of the overflow brick:

[0176]

[0177]

[0178] S2, calculate the equivalent height bottom value of overflow brick:

[0179]

[0180]

[0181] S3, calculate the equivalent height of overflow brick:

[0182]

[0183]

[0184] wherein, is the equivalent thickness of the design overflow brick; is the equivalent thickness of the reference overflow brick; is the equivalent height bottom value of the design overflow brick; is the equivalent height bottom value of the reference overflow brick; is the equivalent height of the design overflow brick; is the equivalent height of the reference overflow brick; is the material density of the overflow brick.

[0185] S4, calculate the length of the support surface of the design overflow brick :

[0186]

[0187] Six, calculate the maximum cylinder pressure of the design overflow brick without bending clamping cylinder

[0188]

[0189] Before the initial use of the overflow brick without creep, the deformation of the overflow brick is in the order of μm, and the initial value of the clamping cylinder pressure before the lead plate (heating and wetting) is about , and the clamping cylinder pressure after the lead plate is recommended to be ; after the creep of the overflow brick continues to increase, the clamping force of the cylinder should not be increased by more than .

[0190] The above content is only to illustrate the technical idea of the present application, and cannot limit the protection scope of the present application. Any modification made according to the technical idea of the present application on the basis of the technical scheme falls within the protection scope of the claims of the present application.

Claims

1. A method of designing a high strength low creep overflow brick, characterized by, The method comprises the following steps: Step one, selecting a mature glass substrate manufacturing overflow brick as a reference overflow brick, obtaining the design parameters of the reference overflow brick, and determining the design parameters of the design overflow brick; Step two, according to the design parameters of the reference overflow brick obtained in step one, the proximal waist height of the reference overflow brick is calculated and distal rise ； Step three, calculate the first average rise of the reference overflow brick according to the parameters obtained in step one and the parameters obtained in step two and the second average rise ； Step four, establishing a similarity relationship between the reference overflow brick and the design overflow brick, the similarity relationship including an overflow groove wall thickness similarity relationship, a first average crotch height similarity relationship, and a second average crotch height similarity relationship; Step five, the overflow launder wall thickness of the design overflow launder is calculated by the overflow launder wall thickness similarity relationship ； Step six, based on the parameters obtained in steps one to three and step five and the similarity relationship described in step four, establish the first height of the inlet cross section of the overflow brick and the inlet cross-sectional second height equations, solving the system of equations, calculating the first height of the inlet cross section and the inlet cross-sectional second height ； Step seven, calculating the strength parameters of the reference overflow brick and the design overflow brick according to the parameters obtained in the above steps; Step eight, calculate the length of the support surface of the overflow brick according to the parameters obtained in step seven and clamp cylinder maximum cylinder pressure , complete the design of high-strength low-creep overflow brick.

2. A method of designing a high strength low creep overflow brick as claimed in claim 1, wherein, In step two, the reference spillover brick's proximal waist height is: the distal crotch height of the reference overflow brick is the inlet cross-sectional overflow groove depth of the reference overflow brick. In the formulae, to refer to the first height of the inlet cross section of the overflow brick; to refer to the width of the overflow face of the overflow brick, To refer to the overflow groove wall thickness of the overflow brick; to refer to the overflow slope angle of the overflow brick, to refer to the overflow brick tip chamfer radius of the overflow brick; to refer to the second height of the inlet cross section of the overflow brick; to refer to the inclination of the overflow weir of the overflow brick; is the inlet cross-sectional overflow groove depth of the reference overflow brick.

3. A method of designing a high strength low creep overflow brick as claimed in claim 2, wherein, In step three, the first average rise of the reference flood brick is: the second average rise of the reference flood brick In step four, the overflow groove wall thickness similarity relationship is: 。 4. A method of designing a high strength low creep overflow brick as claimed in claim 3, wherein, The first average crotch height similarity relationship is: The second average crotch height similarity relationship is: is the inlet cross-sectional overflow groove depth of the design overflow brick. wherein To design the overflow groove wall thickness of overflow brick; To design the overflow groove wall thickness of overflow brick; to design the first average rise of the overflow brick; to design the second average rise of the overflow brick; To design the second average rise of the overflow brick corresponding crotch width; To reference the second average rise of the overflow brick corresponding crotch width; n is the creep stress exponent of the overflow brick; To design the overflow face width of the overflow brick; to refer to the width of the overflow face of the overflow brick; to refer to the overflow groove depth at the inlet cross section of the overflow brick; , specifically:

5. A method of designing a high strength low creep overflow brick as claimed in claim 4, wherein, In step five, the overflow launder wall thickness of the designed overflow brick is is: 。 6. A method of designing a high strength low creep overflow brick as claimed in claim 4, wherein, In step six, the design overflow brick has an equation set for the first height of the inlet cross section and the second height of the inlet cross section ​ Equation One, Near Waist Height for Designing Overflow Bricks , specifically: Equation Two, regarding the design of the distal rise of the overflow brick , specifically: Equation Three, First Average Rise for Design Flood Weir Block , specifically: Equation Four, Second Average Rise about the Design Flood Brick , specifically: Equation Five, Second Average Rise about the Design Flood corresponding crotch width The equation of is the equation of Equation Six, a first average rise similarity relationship, lists the first average rise of the design overflow brick in terms of the first average rise of the design overflow brick from Step Four The equation of is the equation of Equation Seven, a second average rise similarity relationship, lists the second average rise for the design overflow brick based on the second average rise from Step Four is the overflow weir inclination angle of the design overflow brick. In the formulae, To design the overflow brick tip chamfer radius of the overflow brick; To design the overflow slope angle of the overflow brick; In step seven, the strength parameters of the reference overflow brick and the design overflow brick are obtained, specifically:

7. A method of designing a high strength low creep overflow brick as claimed in claim 6, wherein, The strength parameters include equivalent thickness, equivalent height bottom value, and equivalent height; The equivalent thickness of the reference overflow brick and the design overflow brick is: is the equivalent thickness of the design overflow brick; In the formulae, to refer to the equivalent thickness of the overflow brick, The equivalent height bottom value of the reference overflow brick and the design overflow brick is: is the equivalent height bottom value of the design overflow brick; In the formulae, to reference the equivalent height floor value of the overflow brick, is: Designing the equivalent height of overflow bricks is: Reference to equivalent height of overflow brick is the material density of the overflow brick. wherein, To design the equivalent thickness of overflow bricks; to refer to the equivalent thickness of the overflow brick; To design the equivalent height bottom value of overflow bricks; to reference the equivalent height floor value of the overflow brick; To design the equivalent height of overflow bricks; to refer to the equivalent height of the overflow brick; to refer to the distal crotch height of the overflow brick; is the overflow brick support surface length of the reference overflow brick.

8. A method of designing a high strength low creep overflow brick as claimed in claim 7, wherein, In step eight, the length of the support face of the design overflow brick is is: In the formulae, is the overflow surface width of the design overflow brick.

9. A method of designing a high strength low creep overflow brick as claimed in claim 7, wherein, In step eight, the maximum cylinder pressure of the pinch cylinder for designing the overflow brick is: In the formulae, To design the equivalent height of overflow bricks, To design the equivalent thickness of overflow bricks; Designed and manufactured based on the design method of a high-strength low-creep overflow brick according to any one of claims 1-9.

10. A high strength, low creep overflow brick characterized by, ​

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