Glass production annealing kiln structure applied to two-layer floor and cooling system

Abstract

The invention relates to the technical field of glass manufacturing, in particular to a glass production annealing kiln structure applied to a two-layer floor and a cooling system. The annealing kiln is arranged on a two-layer floor of a building body and provided with a cavity, the cavity internally comprises a conveying roller, multiple sets of first air pipes and multiple sets of second air pipes, the conveying roller is used for conveying a glass plate, the multiple sets of first air pipes are arranged above the conveying roller and used for cooling the upper surface of the glass plate, and the multiple sets of second air pipes are arranged below the conveying roller and used for cooling the upper surface of the glass plate. The lower surface of the glass plate is cooled. Wherein the upper surface of the glass plate is provided with a first edge area and a first middle area, the lower surface of the glass plate is provided with a second edge area and a second middle area, the multiple sets of first air pipes are arranged corresponding to the first edge area and the first middle area, and the multiple sets of second air pipes are arranged corresponding to the second middle area. The cooling system comprises the annealing kiln. The annealing kiln and the cooling system are favorable for ensuring the temperature drop uniformity of the whole glass plate.

Description

Technical Field

[0001] The present invention relates to the technical field of glass manufacturing, and particularly to a glass production annealing furnace structure and a cooling system applied to the second floor. Background Art

[0002] An annealing furnace is a device used to reduce the internal stress of glass. The glass produced by the float process is slowly cooled under specific temperature and time conditions to reduce the internal thermal stress of the glass and improve its physical properties. To achieve this goal, the glass needs to be heated in the furnace and maintained at a specific temperature for a period of time, and then slowly cooled according to a predetermined cooling curve. This process helps to prevent stress concentration caused by rapid cooling of the glass, thereby improving the quality and performance of the finished glass.

[0003] Currently, air ducts are usually used to cool the upper and lower surfaces of the glass. However, since the temperature drop at the bottom of the second floor is greatly affected by the environment, the temperature drop on the lower surface of the glass is significantly faster than that on the upper surface of the glass, and the temperature drop at the edge of the glass is significantly faster than that at the middle position of the glass. This will cause uneven overall temperature drop of the glass during cooling, affecting the quality and performance of the finished glass. Summary of the Invention

[0004] The main object of the present invention is to provide a glass production annealing furnace structure and a cooling system applied to the second floor, aiming to solve the technical problem that the overall temperature drop of the glass is uneven during glass annealing, affecting the quality and performance of the finished glass.

[0005] To achieve the above object, the present invention provides a glass production annealing furnace structure applied to the second floor. The annealing furnace is arranged on the second floor of a building body. The annealing furnace has a chamber, and the chamber includes:

[0006] Conveyor rollers for conveying glass plates;

[0007] Multiple groups of first air ducts are arranged above the conveyor rollers for cooling the upper surface of the glass plate;

[0008] Multiple groups of second air ducts are arranged below the conveyor rollers for cooling the lower surface of the glass plate;

[0009] Wherein, the upper surface of the glass plate has a first edge region and a first middle region, the lower surface of the glass plate has a second edge region and a second middle region, multiple groups of the first air ducts are arranged corresponding to the first edge region and the first middle region, and multiple groups of the second air ducts are arranged corresponding to the second middle region.

[0010] In some embodiments, along the direction of conveyance of the glass plate, the chamber includes a high-temperature zone, a suitable-temperature zone, and a low-temperature zone, and the temperature T of the high-temperature zone 1 satisfies: 538 °C ≤ T 1 ≤ 550 °C, and the temperature T of the suitable-temperature zone 2 satisfies: 440 °C ≤ T 2 ≤ 480 °C, and the temperature T of the low-temperature zone 3 satisfies: 350 °C ≤ T 3 ≤ 370 °C.

[0011] In some embodiments, in the high-temperature zone, the temperature T of the upper surface of the glass plate 11 satisfies: 540 °C ≤ T 11 ≤ 550 °C, and the temperature T of the lower surface of the glass plate 12 satisfies: 538 °C ≤ T 12 ≤ 550 °C; in the suitable-temperature zone, the temperature T of the upper surface of the glass plate 21 satisfies: 440 °C ≤ T 21 ≤ 480 °C, and the temperature T of the lower surface of the glass plate 22 satisfies: 445 °C ≤ T 22 ≤ 480 °C; in the low-temperature zone, the temperature T of the upper surface of the glass plate 31 satisfies: 350 °C ≤ T 31 ≤ 360 °C, and the temperature T of the lower surface of the glass plate 32 satisfies: 360 °C ≤ T 32 ≤ 370 °C.

[0012] In some embodiments, the suitable-temperature zone includes a first temperature region and a second temperature region. Along the direction of conveyance of the glass plate, the first temperature region is close to the high-temperature zone, and the second temperature region is close to the low-temperature zone;

[0013] wherein, the temperature T of the first temperature region 4 satisfies: 470 °C ≤ T 4 ≤ 480 °C, and the temperature T of the second temperature region 5 satisfies: 440 °C ≤ T 5 ≤ 465 °C.

[0014] In some embodiments, in the first temperature region, the temperature T of the upper surface of the glass plate 41 satisfies: 470 °C ≤ T 41 ≤ 480 °C, and the temperature T of the lower surface of the glass plate 42 satisfies: 470 °C ≤ T 42 ≤ 480 °C; in the second temperature region, the temperature T of the upper surface of the glass plate 51 satisfies: 440 °C ≤ T 51≤ 460 °C, the temperature T of the lower surface of the glass plate 52 satisfies: 445 °C ≤ T 52 ≤ 465 °C.

[0015] In some embodiments, the annealing furnace includes multiple bottom plates. A floating gap is provided between two adjacent bottom plates. Two bottom plates adjacent to the floating gap are both provided with floating holes, and a connecting member is inserted through the floating holes. The connecting member is used to position the bottom plates;

[0016] Wherein, there is a clearance fit between the connecting member and the floating holes.

[0017] In some embodiments, the width L of the floating gap satisfies: 20 mm ≤ L ≤ 30 mm.

[0018] In some embodiments, corresponding to the first intermediate region, the diameter D of the first air duct 1 satisfies: 70 mm ≤ D 1 ≤ 80 mm; corresponding to the first edge region, the diameter D of the first air duct 2 satisfies: 50 mm ≤ D 2 ≤ 60 mm; corresponding to the second intermediate region, the diameter D of the second air duct 3 satisfies: 70 mm ≤ D 3 ≤ 80 mm.

[0019] In some embodiments, the chamber includes heating wires, and the heating wires are arranged corresponding to the second edge region.

[0020] Correspondingly, the present invention also provides a cooling system, which is used for annealing and cooling of glass plates. The cooling system includes:

[0021] A building body, the building body has a second - floor floor;

[0022] The structure of the glass production annealing furnace applied to the second - floor floor in any of the above - mentioned embodiments, and the annealing furnace structure is arranged on the second - floor floor;

[0023] Wherein, corresponding to the annealing furnace structure, an expansion joint is provided between two adjacent floor slabs of the second - floor floor.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] In the technical solution of the present invention, when the conveying roller conveys the glass plate, multiple groups of first air ducts respectively transmit cold air to the upper surface of the glass plate to achieve uniform annealing and cooling of the upper surface of the glass plate, ensuring uniform temperature distribution on the upper surface of the glass plate. At the same time, multiple groups of second air ducts respectively transmit cold air to the lower surface of the glass plate to achieve uniform annealing and cooling of the lower surface of the glass plate, ensuring uniform temperature distribution on the lower surface of the glass plate. Moreover, on the second floor, since the temperature drop on the lower surface of the glass plate is significantly higher than that on the upper surface of the glass plate, therefore, corresponding to the first edge region and the first middle region on the upper surface of the glass plate, first air ducts are provided in the chamber, and the first air ducts cool and lower the temperature of both the first edge region and the first middle region to improve the temperature drop efficiency of the upper surface of the glass plate. And only corresponding to the second middle region on the lower surface of the glass plate, a second air duct is provided in the chamber, and the second air duct only cools the second middle region. That is, by reducing the number of second air ducts corresponding to the lower surface of the glass plate, the cooling efficiency of the second air ducts on the lower surface of the glass plate is slowed down, so as to ensure uniform temperature drop on the upper and lower surfaces of the glass plate and improve the quality and performance of the finished glass.

[0026] Furthermore, since the temperature drop at the edge of the glass plate is significantly higher than that at the middle position of the glass plate, therefore, corresponding to the edge region of the glass plate, the number of air ducts in the chamber is reduced. Combining the above-mentioned "the temperature drop on the lower surface of the glass plate is significantly higher than that on the upper surface of the glass plate", in the present invention, the number of second air ducts at the second edge region on the lower surface of the glass plate is reduced, so that both the uniformity and consistency of the temperature drop on the upper and lower surfaces of the glass plate can be ensured, and the uniformity and consistency of the temperature drop between the edge region and the middle region of the glass plate can also be ensured.

[0027] In the present invention, by transforming the internal air ducts of the annealing furnace, the number of air ducts corresponding to the lower surface and the edge region of the glass plate is reduced, ensuring the consistency of the temperature drop between the upper and lower surfaces of the glass plate, as well as between the middle region and the edge region of the glass plate, thereby improving the production quality during the cooling and annealing of the glass plate and avoiding situations such as the glass plate exploding or being poorly cut due to uneven cooling or excessive cooling.

[0028] Applying the cooling system of the glass production annealing furnace structure on the above-mentioned second floor can ensure the overall temperature drop consistency and uniformity during the cooling of the glass plate and improve the production quality and performance of the finished glass plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0030] Figure 1 Front view of the overall structure of the annealing furnace structure for glass production applied to the second floor in an embodiment of the present invention;

[0031] Figure 2 Schematic diagram of the connection structure between two adjacent bottom plates in the annealing furnace structure for glass production applied to the second floor in an embodiment of the present invention;

[0032] Figure 3 For Figure 2 Partial enlarged view at position A in

[0033] Figure 4 Schematic diagram of the transmission path of the glass plate in the annealing furnace structure for glass production applied to the second floor in an embodiment of the present invention.

[0034] Explanation of the reference numerals in the drawings:

[0035] 100, annealing furnace;

[0036] 110, chamber; 120, bottom plate; 130, floating seam;

[0037] 111, conveyor roller; 112, first air duct; 113, second air duct; 114, high-temperature zone; 115, suitable-temperature zone; 116, low-temperature zone;

[0038] 1151, first temperature region; 1152, second temperature region;

[0039] 121, floating hole; 122, connecting piece.

[0040] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0042] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0043] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or", "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] The annealing kiln is a device used to reduce the internal stress of glass. It slowly cools the glass produced by the float process under specific temperature and time conditions to reduce the thermal stress inside the glass and improve its physical properties. To achieve this goal, the glass needs to be heated in the kiln and maintained at a specific temperature for a period of time, and then slowly cooled according to a predetermined cooling curve. This process helps prevent stress concentration caused by excessive cooling of the glass, thereby improving the quality and performance of the finished glass.

[0045] At present, air ducts are usually used to cool the upper and lower surfaces of glass. However, since the temperature drop at the bottom of the second floor is greatly affected by the environment, the temperature drop on the lower surface of the glass is significantly faster than that on the upper surface of the glass, and the temperature drop at the edge of the glass is significantly faster than that in the middle of the glass. This will cause the overall temperature drop of the glass to be uneven during cooling, affecting the quality and performance of the finished glass.

[0046] Based on this, in order to solve the current technical problem that the overall temperature drop of glass is uneven during glass annealing, which affects the quality and performance of the finished glass, refer to Figures 1 to 4, an embodiment of the present invention provides a structure of a glass production annealing furnace 100 applied to the second floor. The annealing furnace 100 is arranged on the second floor of a building. The annealing furnace 100 has a chamber 110, and the chamber 110 includes conveying rollers 111, multiple groups of first air ducts 112 and multiple groups of second air ducts 113. The conveying rollers 111 are used to convey glass plates. The multiple groups of first air ducts 112 are arranged above the conveying rollers 111 and are used to cool the upper surface of the glass plates. The multiple groups of second air ducts 113 are arranged below the conveying rollers 111 and are used to cool the lower surface of the glass plates. Among them, the upper surface of the glass plate has a first edge region and a first middle region, and the lower surface of the glass plate has a second edge region and a second middle region. The multiple groups of first air ducts 112 are arranged corresponding to the first edge region and the first middle region, and the multiple groups of second air ducts 113 are arranged corresponding to the second middle region.

[0047] Specifically, in this embodiment, when the conveying rollers 111 convey the glass plates, the multiple groups of first air ducts 112 respectively transmit cold air to the upper surface of the glass plates to achieve uniform annealing and cooling of the upper surface of the glass plates and ensure uniform temperature distribution on the upper surface of the glass plates. At the same time, the multiple groups of second air ducts 113 respectively transmit cold air to the lower surface of the glass plates to achieve uniform annealing and cooling of the lower surface of the glass plates and ensure uniform temperature distribution on the lower surface of the glass plates. And on the second floor, since the temperature drop on the lower surface of the glass plate is significantly higher than that on the upper surface of the glass plate, therefore, corresponding to the first edge region and the first middle region of the upper surface of the glass plate, first air ducts 112 are arranged in the chamber 110, and the first air ducts 112 cool and lower the temperature of both the first edge region and the first middle region to improve the temperature drop efficiency of the upper surface of the glass plate. And only corresponding to the second middle region of the lower surface of the glass plate, second air ducts 113 are arranged in the chamber 110, and the second air ducts 113 only cool the second middle region. That is, by reducing the number of the second air ducts 113 corresponding to the lower surface of the glass plate, the cooling efficiency of the second air ducts 113 on the lower surface of the glass plate is slowed down, so as to ensure uniform temperature drop on the upper and lower surfaces of the glass plate and improve the quality and performance of the finished glass.

[0048] Furthermore, since the temperature drop at the edge of the glass plate is significantly higher than that at the middle position of the glass plate, therefore, corresponding to the edge region of the glass plate, the number of air ducts in the chamber 110 is reduced. Combining the above-mentioned "the temperature drop on the lower surface of the glass plate is significantly higher than that on the upper surface of the glass plate", in this embodiment, the number of the second air ducts 113 at the second edge region of the lower surface of the glass plate is reduced, so that both the uniformity and consistency of the temperature drop on the upper and lower surfaces of the glass plate can be ensured, and the uniformity and consistency of the temperature drop between the edge region and the middle region of the glass plate can also be ensured.

[0049] In this embodiment, by reforming the internal air ducts of the annealing furnace 100, the number of air ducts corresponding to the lower surface and the edge area of the glass plate is reduced, so as to ensure the temperature drop consistency of the upper and lower surfaces of the glass plate, as well as the middle area and the edge area of the glass plate, thereby improving the production quality of the glass plate during cooling and annealing, and avoiding situations such as the glass plate being broken or poorly cut due to uneven cooling or too fast cooling.

[0050] In some embodiments, multiple groups of first air ducts 112 are driven by a first driving mechanism, and the first driving mechanism can drive the multiple groups of first air ducts 112 to move in a direction close to or away from the upper surface of the glass plate. After the multiple groups of first air ducts 112 move in a direction close to the upper surface of the glass plate, the distance between the multiple groups of first air ducts 112 and the upper surface of the glass plate is reduced, which is beneficial to improving the temperature drop effect of the multiple groups of first air ducts 112 on the upper surface of the glass plate. After the multiple groups of first air ducts 112 move in a direction away from the upper surface of the glass plate, the distance between the multiple groups of first air ducts 112 and the upper surface of the glass plate is increased, which is beneficial to reducing the temperature drop effect of the multiple groups of first air ducts 112 on the upper surface of the glass plate. By designing the multiple groups of first air ducts 112 as a movable structure, the controllability of the temperature drop on the upper surface of the glass plate can be ensured.

[0051] Similarly, multiple groups of second air ducts 113 are driven by a second driving mechanism, and the second driving mechanism can drive the multiple groups of second air ducts 113 to move in a direction close to or away from the lower surface of the glass plate. After the multiple groups of second air ducts 113 move in a direction close to the lower surface of the glass plate, the distance between the multiple groups of second air ducts 113 and the lower surface of the glass plate is reduced, which is beneficial to improving the temperature drop effect of the multiple groups of second air ducts 113 on the lower surface of the glass plate. After the multiple groups of second air ducts 113 move in a direction away from the lower surface of the glass plate, the distance between the multiple groups of second air ducts 113 and the lower surface of the glass plate is increased, which is beneficial to reducing the temperature drop effect of the multiple groups of second air ducts 113 on the lower surface of the glass plate. By designing the multiple groups of second air ducts 113 as a movable structure, the controllability of the temperature drop on the lower surface of the glass plate can be ensured.

[0052] In some embodiments, the first driving mechanism includes a first driving motor and a first driving rod. One end of the first driving rod is connected to the output shaft of the first driving motor, and the other end of the first driving rod is connected to the first air duct 112. The first driving motor provides power for the first driving rod, and the first driving rod drives the first air duct 112 to move in a direction close to or away from the upper surface of the glass plate. More preferably, corresponding to the multiple groups of first air ducts 112, multiple first driving rods can be provided, and the multiple first driving rods correspond to the multiple groups of first air ducts 112 one by one, so that a single first air duct 112 can be driven and adjusted by a single first driving rod.

[0053] Similarly, the second driving mechanism includes a second driving motor and a second driving rod. One end of the second driving rod is connected to the output shaft of the second driving motor, and the other end of the second driving rod is connected to the second air duct 113. The second driving motor provides power for the second driving rod, and the second driving rod drives the second air duct 113 to move in a direction close to or away from the lower surface of the glass plate. More preferably, corresponding to multiple groups of second air ducts 113, multiple second driving rods can be provided, and the multiple second driving rods and the multiple groups of second air ducts 113 are in one-to-one correspondence, so that a single second air duct 113 can be driven and adjusted by a single second driving rod.

[0054] In some embodiments, referring to Figure 4 , along the direction of glass plate conveyance, the chamber 110 includes a high-temperature zone 114, a suitable-temperature zone 115, and a low-temperature zone 116 (the high-temperature zone 114, the suitable-temperature zone 115, and the low-temperature zone 116 are all enclosed areas). The temperature T 1 of the high-temperature zone 114 satisfies: 538 °C ≤ T 1 ≤ 550 °C. The temperature T 2 of the suitable-temperature zone 115 satisfies: 440 °C ≤ T 2 ≤ 480 °C. The temperature T 3 of the low-temperature zone 116 satisfies: 350 °C ≤ T 3 ≤ 370 °C. Exemplarily, for example, the value of T 1 can be 538 °C, 540 °C, 545 °C, 550 °C, etc. The value of T 2 can be 440 °C, 450 °C, 460 °C, 480 °C, etc. The value of T 3 can be 350 °C, 360 °C, 365 °C, 370 °C, etc.

[0055] Specifically, in this embodiment, the glass plate is annealed and cooled step by step, and the glass plate is heated and kept warm in stages to ensure the uniformity of the glass plate during annealing and cooling, and to avoid situations such as the glass plate cracking due to excessive cooling. First, the glass plate passes through the high-temperature zone 114, where the temperature is maintained between 538 °C and 550 °C (including the end values), so that the surface of the glass plate remains at a high temperature, thereby effectively reducing its viscosity and facilitating subsequent processing. Then, the glass plate enters the suitable-temperature zone 115, where the temperature is maintained between 440 °C and 480 °C (including the end values), and the glass plate can be continuously heated and kept warm to ensure that its internal temperature drops uniformly, and to avoid stress concentration caused by the temperature difference between the surface and the inside of the glass plate. Finally, the glass plate enters the low-temperature zone 116, where the temperature is maintained between 350 °C and 370 °C (including the end values), and the glass plate is helped to release internal stress in a slow cooling manner, thereby improving the stability and strength of the glass plate during annealing and cooling. During the entire process of cooling and annealing, the gradient change of the temperature zone enables the glass plate to gradually adapt to different heat treatment conditions, effectively improving the annealing efficiency and product quality of the glass plate.

[0056] In some embodiments, in the high-temperature zone 114, the upper surface temperature T of the glass plate 11 satisfies: 540 °C ≤ T 11 ≤ 550 °C, and the lower surface temperature T of the glass plate 12 satisfies: 538 °C ≤ T 12 ≤ 550 °C; in the suitable-temperature zone 115, the upper surface temperature T of the glass plate 21 satisfies: 440 °C ≤ T 21 ≤ 480 °C, and the lower surface temperature T of the glass plate 22 satisfies: 445 °C ≤ T 22 ≤ 480 °C; in the low-temperature zone 116, the upper surface temperature T of the glass plate 31 satisfies: 350 °C ≤ T 31 ≤ 360 °C, and the lower surface temperature T of the glass plate 32 satisfies: 360 °C ≤ T 32 ≤ 370 °C. Exemplarily, for example, the value of T 11 can be 540 °C, 545 °C, 550 °C, etc. The value of T 12 can be 538 °C, 545 °C, 550 °C, etc. The value of T 21 can be 440 °C, 460 °C, 480 °C, etc. The value of T 22 can be 445 °C, 460 °C, 480 °C, etc. The value of T 31 can be 350 °C, 355 °C, 360 °C, etc. The value of T 32 can be 360 °C, 365 °C, 370 °C, etc.

[0057] Specifically, in this embodiment, when the glass plate is annealed and cooled in the annealing furnace 100, the conveying roller 111 drives the glass plate to sequentially pass through the high-temperature zone 114, the suitable-temperature zone 115, and the low-temperature zone 116, so as to realize the staged annealing and cooling of the glass plate in the annealing furnace 100. By adopting the above cooling method, on the one hand, it can reduce the cooling rate of the glass plate, ensure that the glass plate can be cooled evenly, and rapid cooling in a short time will cause greater stress, affecting the physical properties of the glass plate. By staged cooling, the overall temperature of the glass plate can be reduced more evenly, reducing stress concentration caused by uneven temperature change or drastic temperature change, helping the internal stress of the glass plate to be gradually released, avoiding thermal stress caused by uneven temperature distribution, thereby reducing the fragmentation phenomenon of the glass plate and improving the yield and quality of the glass plate. On the other hand, it can protect the annealing furnace 100. Sudden temperature drop may cause additional thermal shock to the equipment in the annealing furnace 100 and shorten the service life of the annealing furnace 100. Staged cooling can reduce thermal shock, protect the equipment in the annealing furnace 100, and extend the service life of the annealing furnace 100.

[0058] By setting multiple cooling zones in the annealing furnace 100, the glass plate can experience multiple cooling stages, enabling the glass plate to gradually adapt to the temperature reduction in each stage, reducing the thermal shock caused by sudden temperature change to the glass plate or the annealing furnace 100, and finally making the cooling process more stable and gentle, thus being beneficial to improving the production quality and performance of the finished glass.

[0059] During the annealing and cooling process of the glass plate, since the temperature drop on the lower surface of the glass plate is significantly higher than that on the upper surface, it is necessary to control the temperature of the lower surface of the glass plate not to be lower than that of the upper surface to insulate the lower surface of the glass plate and ensure that the temperature drops of the upper and lower surfaces of the glass plate are consistent. During actual production, the temperature changes of the upper and lower surfaces of the glass plate in each cooling area can be monitored in real time through the cooperation of thermocouples and infrared temperature sensors. When the actual temperatures of the upper and lower surfaces of the glass plate are higher than the above preset temperature range, the air supply volume in the first air duct 112 or the second air duct 113 can be correspondingly increased (for example, the first air duct 112 can be provided with a first air valve, and the air supply volume in the first air duct 112 can be adjusted by adjusting the first air valve. The second air duct 113 can be provided with a second air valve, and the air supply volume in the second air duct 113 can be adjusted by adjusting the second air valve), or the temperature of the cooling medium in the first air duct 112 or the second air duct 113 can be correspondingly reduced. Similarly, when the actual temperatures of the upper and lower surfaces of the glass plate are lower than the above preset temperature range, the air supply volume in the first air duct 112 or the second air duct 113 can be correspondingly reduced, or the temperature of the cooling medium in the first air duct 112 or the second air duct 113 can be correspondingly increased. By timely adjusting the cooling effect of the first air duct 112 or the second air duct 113 on the upper and lower surfaces of the glass plate, the temperature drop consistency of the upper and lower surfaces of the glass plate can be ensured, and uniform annealing of the glass plate can be achieved.

[0060] It should be noted that since the annealing furnace 100 is arranged on the second floor and the temperature in the high-temperature area 114 is relatively high and the cooling effect is obvious, the temperature of the lower surface of the glass plate in the high-temperature area 114 is lower than that of the upper surface.

[0061] In some embodiments, referring to Figure 4 , the suitable temperature area 115 includes a first temperature area 1151 and a second temperature area 1152. Along the direction of glass plate transmission, the first temperature area 1151 is close to the high-temperature area 114, and the second temperature area 1152 is close to the low-temperature area 116. Among them, the temperature T 4 of the first temperature area 1151 satisfies: 470 °C ≤ T 4 ≤ 480 °C, and the temperature T 5 of the second temperature area 1152 satisfies: 440 °C ≤ T 5 ≤ 465 °C. Exemplarily, for example, the value of T 4 can be 470 °C, 475 °C, 480 °C, etc. The value of T 5 can be 440 °C, 450 °C, 465 °C, etc.

[0062] In the first temperature area 1151, the upper surface temperature T 41 of the glass plate satisfies: 470 °C ≤ T 41≤480 °C, the temperature T of the lower surface of the glass plate 42 satisfies: 470 °C ≤ T 42 ≤ 480 °C; in the second temperature region 1152, the temperature T of the upper surface of the glass plate 51 satisfies: 440 °C ≤ T 51 ≤ 460 °C, the temperature T of the lower surface of the glass plate 52 satisfies: 445 °C ≤ T 52 ≤ 465 °C. Exemplarily, for example, the value of T 41 can be 470 °C, 475 °C, 480 °C, etc. The value of T 42 can be 470 °C, 475 °C, 480 °C, etc. The value of T 51 can be 440 °C, 450 °C, 460 °C, etc. The value of T 52 can be 445 °C, 450 °C, 465 °C, etc.

[0063] Specifically, in this embodiment, the preset temperature range in the first temperature region 1151 is closer to the preset temperature range in the high-temperature region 114. When the glass plate is transferred from the high-temperature region 114 to the first temperature region 1151, due to the small change in the temperature range, it is beneficial to achieve a stepped temperature transition of the glass plate between the high-temperature region 114 and the first temperature region 1151. The preset temperature range in the second temperature region 1152 is closer to the preset temperature range in the low-temperature region 116. When the glass plate is transferred from the second temperature region 1152 to the low-temperature region 116, due to the small change in the temperature range, it is beneficial to achieve a stepped temperature transition of the glass plate between the second temperature region 1152 and the low-temperature region 116.

[0064] By dividing the suitable temperature region 115 into multiple temperature regions, it is beneficial to reduce the temperature difference between each cooling region, make the temperature distribution in the uniform annealing furnace 100 uniform, thereby effectively preventing the phenomenon of thermal stress concentration during the cooling process of the glass plate, preventing the glass plate from cracking, and ensuring the production quality and performance of the glass plate.

[0065] It should be noted that, referring to the suitable temperature region 115, the high-temperature region 114 and the low-temperature region 116 can also be provided with multiple temperature regions to achieve staged cooling of the glass plate, eliminate the adverse effects of thermal stress on the glass plate, and improve the production quality and performance of the glass plate.

[0066] Since the temperature drop on the lower surface of the glass plate is significantly higher than that on the upper surface of the glass plate, it is necessary to control the temperature of the lower surface of the glass plate not to be lower than that of the upper surface of the glass plate to insulate the lower surface of the glass plate and ensure that the temperature drops of the upper and lower surfaces of the glass plate are consistent.

[0067] In some embodiments, referring to Figure 2 and Figure 3The annealing furnace 100 includes a plurality of bottom plates 120, a floating seam 130 is provided between two adjacent bottom plates 120, and the two bottom plates 120 adjacent to the floating seam 130 are both provided with a floating hole 121, and a connecting member 122 (for example, the connecting member 122 may be a bolt) is inserted into the floating hole 121, and the connecting member 122 is used to position the bottom plate 120. The gap between the connecting member 122 and the floating hole 121 is matched, that is, the two bottom plates 120 adjacent to the floating seam 130 can move relative to each other. For example, since the temperature change of the high temperature zone 114 and the low temperature zone 116 is large, the expansion or contraction change of the high temperature zone 114 and the low temperature zone 116 is also large, so the floating seam 130 can be provided in both the high temperature zone 114 and the low temperature zone 116, and the displacement of the bottom plate 120 caused by thermal expansion and contraction is offset by the floating seam 130.

[0068] Specifically, in this embodiment, due to the influence of the ambient temperature or the working temperature of the annealing furnace 100, the shell of the annealing furnace 100 may expand and contract due to heat. Therefore, in order to cope with the above situation, a floating seam 130 is provided between two adjacent bottom plates 120 of the annealing furnace 100 (i.e., a certain distance is provided between two adjacent bottom plates 120 of the annealing furnace 100). Preferably, the floating seam 130 can be provided at a position where the annealing furnace 100 is prone to expansion and contraction due to heat. In conjunction with the floating holes 121 and the connector 122 provided on the bottom plate 120, when the shell of the annealing furnace 100 expands due to heat, the two bottom plates 120 adjacent to the floating seam 130 will move toward each other, so that the floating seam 130 will shrink, ensuring that there is a displacement margin between the two adjacent bottom plates 120, and preventing the two adjacent bottom plates 120 from squeezing each other after being heated, causing the shell of the annealing furnace 100 to deform, and causing damage to the structure of the annealing furnace 100. When the shell of the annealing kiln 100 contracts due to cooling, the two bottom plates 120 adjacent to the floating gap 130 will move away from each other, causing the floating gap 130 to become larger. Under the control of the connecting piece 122, the bottom plates 120 after movement are still in a stable positioning state, ensuring that the relative position of the bottom plates 120 is maintained within the allowable range, thereby ensuring the stability and adaptability of the entire kiln structure.

[0069] By setting a floating seam 130 between two adjacent bottom plates 120 of the annealing furnace 100, and opening a floating hole 121 on the two bottom plates 120 adjacent to the floating seam 130, and then using a bolt or other connecting piece 122 with a clearance fit to pass through the floating hole 121 to position the bottom plate 120, flexible connection and adjustment between the bottom plates 120 are effectively achieved.

[0070] In some embodiments, reference Figure 3 , the width L of the floating slit 130 satisfies: 20 mm ≤ L ≤ 30 mm. For example, the value of L can be 20 mm, 23 mm, 25 mm, 27 mm, 30 mm, and so on.

[0071] Specifically, in this embodiment, during actual production and processing, after the annealing furnace 100 is affected by temperature changes, the stroke range of its thermal expansion and contraction is between 20 mm and 30 mm (including the end values). Corresponding to the stroke range of the thermal expansion and contraction of the annealing furnace 100, the slit width of the floating slit 130 is also set between 20 mm and 30 mm (including the end values). On the one hand, it can avoid the slit width of the floating slit 130 being too small, resulting in insufficient displacement allowance between two adjacent bottom plates 120, and causing extrusion deformation between the bottom plates 120 after heating. On the other hand, it can avoid the slit width of the floating slit 130 being too large, resulting in an uncompact structure of the annealing furnace 100.

[0072] In some embodiments, referring to Figure 1 , corresponding to the first intermediate region, the pipe diameter D of the first air duct 112 1 satisfies: 70 mm ≤ D 1 ≤ 80 mm; corresponding to the first edge region, the pipe diameter D of the first air duct 112 2 satisfies: 50 mm ≤ D 2 ≤ 60 mm; corresponding to the second intermediate region, the pipe diameter D of the second air duct 113 3 satisfies: 70 mm ≤ D 3 ≤ 80 mm. Exemplarily, for example, the value of D 1 can be 70 mm, 75 mm, 80 mm, etc. The value of D 2 can be 50 mm, 55 mm, 60 mm, etc. The value of D 3 can be 70 mm, 75 mm, 80 mm, etc.

[0073] Specifically, in this embodiment, since the temperature drop at the edge of the glass plate is significantly higher than that at the middle position of the glass plate, the annealing control temperature at the edge of the glass plate is higher than that at the middle position of the glass plate. Therefore, corresponding to the edge region of the glass plate, the pipe diameters of the upper and lower air ducts are smaller, so that a smaller amount of cooling medium fills the upper and lower air ducts, thereby reducing the cooling effect of the upper and lower air ducts on the edge region of the glass plate and improving the heat preservation effect of the annealing furnace 100 on the edge region of the glass plate. Corresponding to the middle region of the glass plate, the pipe diameters of the upper and lower air ducts are larger, so that a larger amount of cooling medium fills the upper and lower air ducts, thereby improving the cooling effect of the upper and lower air ducts on the middle region of the glass plate, ensuring the temperature drop uniformity and consistency of the whole glass plate, and reducing or eliminating the adverse effects of thermal stress on the glass plate.

[0074] In some embodiments, a heating wire is included inside the chamber 110, and the heating wire is arranged corresponding to the second side region. When the temperature drop of the side region of the glass plate is relatively large, the side region of the glass plate can be heated and insulated by the heating wire to eliminate the temperature difference between the side region and the middle region of the glass plate, and avoid the situation that the side region is cracked due to the large temperature drop of the side region.

[0075] Correspondingly, another embodiment of the present invention further provides a cooling system, which includes the structure of the glass production annealing kiln 100 applied to the second floor in any of the above embodiments. The cooling system further includes a building body with a second floor, and the above annealing kiln 100 structure is arranged on the second floor. Wherein, corresponding to the annealing kiln 100 structure, an expansion joint is arranged between two adjacent floor slabs of the second floor. When the annealing kiln 100 structure expands or contracts, due to the expansion joint arranged on the second floor, the second floor can also expand or contract correspondingly, preventing the second floor from being damaged due to thermal expansion and contraction. Further, in order to ensure the flatness of the second floor, a steel plate can be laid above the expansion joint.

[0076] Specifically, in this embodiment, the cooling system applying the structure of the glass production annealing kiln 100 on the second floor can ensure the overall temperature drop consistency and uniformity during the cooling of the glass plate, and improve the production quality and performance of the finished glass plate.

[0077] Benefiting from the improvement of the above annealing kiln 100 structure, the cooling system of this embodiment has the same technical effects as the above annealing kiln 100, which will not be elaborated here.

[0078] It should be noted that other contents of the structure of the glass production annealing kiln 100 applied to the second floor and the cooling system disclosed in the present invention can be referred to the prior art, which will not be elaborated here.

[0079] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the description and drawings of the present invention under the inventive concept of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A glass production annealing furnace structure applied to the second floor, characterized in that: The annealing kiln is arranged on the second floor of the building, and the annealing kiln has a chamber, and the chamber includes: A conveying roller, wherein the conveying roller is used to convey the glass plate; A plurality of groups of first air ducts, wherein the plurality of groups of first air ducts are arranged above the conveying rollers and are used to cool the upper surface of the glass plate; A plurality of groups of second air ducts, the plurality of groups of second air ducts being arranged below the conveying rollers and used for cooling the lower surface of the glass plate; Among them, the upper surface of the glass plate has a first edge area and a first middle area, the lower surface of the glass plate has a second edge area and a second middle area, multiple groups of the first air ducts are arranged corresponding to the first edge area and the first middle area, and multiple groups of the second air ducts are arranged corresponding to the second middle area.

2. The glass production annealing furnace structure applied to the second floor according to claim 1 is characterized in that: Along the direction of conveying the glass plate, the chamber includes a high temperature zone, a suitable temperature zone and a low temperature zone. The temperature T1 of the high temperature zone satisfies: 538℃≤T1≤550℃, the temperature T2 of the suitable temperature zone satisfies: 440℃≤T2≤480℃, and the temperature T3 of the low temperature zone satisfies: 350℃≤T3≤370℃.

3. The glass production annealing furnace structure applied to the second floor according to claim 2 is characterized in that: In the high temperature zone, the upper surface temperature of the glass plate is T 11 Meet: 540℃≤T 11 ≤550℃, the lower surface temperature of the glass plate is T 12 Meet: 538℃≤T 12 ≤550℃; in the suitable temperature zone, the upper surface temperature of the glass plate is T 21 Meet: 440℃≤T 21 ≤480℃, the lower surface temperature of the glass plate is T 22 Meet: 445℃≤T 22 ≤480℃; in the low temperature zone, the upper surface temperature of the glass plate is T 31 Satisfy: 350℃≤T 31 ≤360℃, the lower surface temperature of the glass plate is T 32 Satisfy: 360℃≤T 32 ≤370℃.

4. The glass production annealing furnace structure applied to the second floor according to claim 2 is characterized in that: The suitable temperature zone includes a first temperature zone and a second temperature zone. Along the direction in which the glass sheet is conveyed, the first temperature zone is close to the high temperature zone, and the second temperature zone is close to the low temperature zone. The temperature T4 in the first temperature zone satisfies: 470°C≤T4≤480°C, and the temperature T5 in the second temperature zone satisfies: 440°C≤T5≤465°C.

5. The glass production annealing furnace structure applied to the second floor according to claim 4, characterized in that: In the first temperature region, the upper surface temperature of the glass plate is T 41 Meet: 470℃≤T 41 ≤480℃, the lower surface temperature of the glass plate is T 42 Meet: 470℃≤T 42 ≤480°C; in the second temperature region, the upper surface temperature of the glass plate is T 51 Meet: 440℃≤T 51 ≤460℃, the lower surface temperature of the glass plate is T 52 Meet: 445℃≤T 52 ≤465℃.

6. The glass production annealing furnace structure applied to the second floor according to claim 1, characterized in that: The annealing furnace comprises a plurality of bottom plates, a floating seam is provided between two adjacent bottom plates, two bottom plates adjacent to the floating seam are provided with floating holes, a connecting piece is passed through the floating hole, and the connecting piece is used to position the bottom plates; Wherein, the connecting member and the floating hole are clearance-fitted.

7. The glass production annealing furnace structure applied to the second floor according to claim 6, characterized in that: The seam width L of the floating seam satisfies: 20mm≤L≤30mm.

8. The glass production annealing furnace structure applied to the second floor according to claim 1, characterized in that: Corresponding to the first middle area, the diameter D1 of the first air duct satisfies: 70mm≤D1≤80mm; corresponding to the first edge area, the diameter D2 of the first air duct satisfies: 50mm≤D2≤60mm; corresponding to the second middle area, the diameter D3 of the second air duct satisfies: 70mm≤D3≤80mm.

9. The glass production annealing furnace structure applied to the second floor according to any one of claims 1 to 8, characterized in that: The chamber includes a heating wire, and the heating wire is arranged corresponding to the second edge area.

10. A cooling system for annealing and cooling a glass sheet, characterized in that: include: A building, wherein the building has two floors; The glass production annealing furnace structure applied to the second floor as claimed in any one of claims 1 to 9, wherein the annealing furnace structure is arranged on the second floor; Wherein, corresponding to the annealing kiln structure, an expansion joint is arranged between two adjacent floor slabs of the second floor.

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