A glass forming tin bath and a float glass manufacturing system
By installing vent pipes in the high-temperature, medium-temperature, and low-temperature zones of the tin bath during float glass production, the problem of glass defects caused by contaminant accumulation was solved, achieving high-quality glass strip forming and improved product uniformity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 信义玻璃(广西)有限公司
- Filing Date
- 2025-09-17
- Publication Date
- 2026-08-04
AI Technical Summary
In traditional float glass production, pollutants such as sodium ions and sulfur vapors generated during the glass's movement in the tin bath tend to accumulate in the low-to-medium temperature range, leading to glass defects and affecting the forming quality.
Vent pipes are installed in the high-temperature, medium-temperature, and low-temperature zones of the glass forming tin bath to discharge pollutants, control the uniformity of air pressure, and prevent the accumulation of pollutants.
It effectively removes pollutants such as sodium ions, sulfur vapor, and tin sulfide/tin oxide vapor, improving the forming quality of glass ribbons and the overall uniformity of float glass products.
Smart Images
Figure CN224590844U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of float glass technology, and in particular relates to a glass forming tin bath and a float glass preparation system. Background Technology
[0002] The formation of float glass takes place in a tin bath filled with protective gas. Molten glass continuously flows from the furnace into the tin bath, floating on the surface of the denser molten tin. Drawn by the drawing rollers, the molten glass spreads and flattens on the tin surface, then hardens and cools before being guided to the transition roller table. The rotating rollers of the transition roller table pull the glass strip out of the tin bath and into the annealing furnace. After annealing and cutting, the final float glass product is formed. Venting the tin bath maintains the purity of the reducing gas within the bath, preventing oxidation of the molten tin and the resulting glass defects.
[0003] Traditionally, vent pipes are usually only installed in high-temperature areas, and the number of them is limited.
[0004] However, during the glass's operation in the tin bath, trace amounts of sodium ions and sulfur vapor are continuously released. These gaseous substances tend to accumulate as contaminants in the mid-temperature zone. Meanwhile, tin sulfide vapor and tin oxide vapor generated in the low-temperature zone also tend to accumulate in the water bath and outlet area, leading to glass defects and ultimately affecting the forming quality of the glass ribbon. Utility Model Content
[0005] The purpose of this application is to provide a glass forming tin bath, which aims to solve the problem of how to improve the forming quality of glass ribbons.
[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:
[0007] A glass forming tin bath is provided for forming glass in a liquid state, the glass forming tin bath comprising:
[0008] A tin bath shell has a forming tank. Glass flows into the forming tank at one end of the tin bath shell and exits from the forming tank at the other end. The forming tank has a first temperature zone, a second temperature zone, and a third temperature zone, which are arranged sequentially along the flow direction of the glass. The temperature of the first temperature zone, the second temperature zone, and the third temperature zone decreases sequentially.
[0009] The gas control structure includes multiple vent pipes, each of which is connected to the tin bath shell and communicates with the molding tank.
[0010] Each of the first temperature zone, the second temperature zone, and the third temperature zone is provided with at least one vent pipe.
[0011] In some embodiments, the number of venting tubes in the second temperature zone is less than the number of venting tubes in the first temperature zone, and / or the number of venting tubes in the third temperature zone is less than the number of venting tubes in the first temperature zone.
[0012] In some embodiments, the glass forming tin bath further includes an edge-pulling machine, wherein the vent pipe of the first temperature zone and the vent pipe of the second temperature zone are respectively located on both sides of the edge-pulling machine.
[0013] In some embodiments, the vent pipes are arranged in pairs, and along the flow direction of the glass, the two vent pipes in the same pair are located on opposite sides of the tin bath housing.
[0014] In some embodiments, the vent pipe includes a first pipe body connected to the tin bath housing and a second pipe body connected to the first pipe body. The first pipe body is arranged along a first direction, and the second pipe body is arranged along a second direction. The first direction and the second direction are staggered.
[0015] In some embodiments, the first pipe body is provided with a first flange, the second pipe body is provided with a second flange, and the first flange is connected to the second flange.
[0016] In some embodiments, the first tube body has a first extension tube formed in a direction away from the tin bath housing, and the vent tube further includes a sealing assembly. The sealing assembly includes a sealing door rotatably connected to the first extension tube and a locking member. The sealing door is used to close or open the opening of the first extension tube. When the sealing door is in the closed state, one end of the locking member is connected to the first extension tube, and the other end of the locking member is engaged with the sealing door.
[0017] In some embodiments, one end of the locking member is rotatably connected to the first extension tube, the other end of the locking member is provided with a locking groove, the free end of the sealing door is provided with a locking post, and the locking member is rotated by a predetermined angle so that the locking groove engages with the locking post.
[0018] In some embodiments, the second tube extends downward and forms a second extension tube, the second extension tube is provided with the sealing assembly, and the locking member is connected to the second extension tube.
[0019] In a second aspect, a float glass preparation system is provided, which includes the glass forming tin bath and the float glass preparation system further includes a transition roller table for receiving the glass.
[0020] The beneficial effects of this application are as follows: by arranging at least one vent pipe in each of the first temperature zone, the second temperature zone, and the third temperature zone, pollutants such as sodium ions, sulfur vapor, and tin sulfide / tin oxide vapor can be effectively discharged in the high temperature zone, the medium temperature zone, and the low temperature zone. This prevents glass defects caused by the accumulation of pollutants in the medium and low temperature zones, improves the forming quality of the glass ribbon, and also balances the overall air pressure in the forming tank, improves the uniformity of air pressure, and thus enhances the overall uniformity of float glass products. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the glass forming tin bath provided in the embodiments of this application;
[0023] Figure 2 This is a schematic diagram of the structure of the vent pipe provided in another embodiment of this application;
[0024] Figure 3 yes Figure 2 A magnified view of a portion of point A in the vent pipe;
[0025] Figure 4 yes Figure 2 A three-dimensional structural diagram of the vent pipe.
[0026] The following are the labeling elements in the figure:
[0027] 100. Glass forming tin bath; 40. Tin bath shell; 41. Forming cavity; 30. Edge pulling machine; 10. Vent pipe; 31. First temperature zone; 32. Second temperature zone; 33. Third temperature zone; 11. First pipe body; 12. Second pipe body; 111. First flange; 121. Second flange; 112. First extension pipe; 122. Second extension pipe; 13. Sealing assembly; 131. Locking fastener; 132. Locking pin; 133. Sealing door. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0029] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are for ease of description only, not to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "A plurality" means two or more, unless otherwise explicitly defined.
[0030] Please see Figures 1 to 3 This application provides a glass forming tin bath 100 and a float glass preparation system having the same. The glass forming tin bath 100 is used to form glass in a liquid state.
[0031] The glass forming tin bath 100 includes a tin bath shell 40 and a gas control structure.
[0032] Please see Figures 1 to 3 Please see Figures 1 to 3 The tin bath housing 40 has a forming tank and is mounted on a civil engineering structure. The glass flows into the forming tank at one end of the tin bath housing 40 and exits at the other end. The forming tank has a first temperature zone 31, a second temperature zone 32, and a third temperature zone 33, arranged sequentially along the flow direction of the glass, with the temperatures of the first temperature zone 31, the second temperature zone 32, and the third temperature zone 33 decreasing sequentially. It is understood that the first temperature zone 31, the second temperature zone 32, and the third temperature zone 33 are, respectively, a high-temperature zone, a medium-temperature zone, and a low-temperature zone. In other embodiments, the first temperature zone 31, the second temperature zone 32, and the third temperature zone 33 may also be a polishing zone, a forming zone, and a cooling zone, respectively. The glass sequentially passes through the first temperature zone 31, the second temperature zone 32, and the third temperature zone 33 to undergo thinning, forming, and cooling.
[0033] The gas control structure includes multiple vent pipes 10, each of which is connected to the tin bath housing 40 and communicates with the forming tank. It is understood that the vent pipes 10 are used to regulate the gas pressure in the forming tank and to discharge impurity gases and vapors that can cause glass contamination in the forming tank.
[0034] Please see Figures 1 to 3 Each of the first temperature zone 31, the second temperature zone 32, and the third temperature zone 33 is provided with at least one vent pipe 10. Thus, the air pressure in each of the three temperature zones can be adjusted through the vent pipes 10, thereby maintaining the stability of the overall air pressure within the molding tank. Furthermore, each vent pipe 10 can also discharge the steam generated in the first temperature zone 31, the second temperature zone 32, and the third temperature zone 33, preventing harmful steam from accumulating within the molding tank.
[0035] Please see Figures 1 to 3 The glass forming tin bath 100 provided in this application embodiment has at least one vent pipe 10 arranged in each of the first temperature zone 31, the second temperature zone 32 and the third temperature zone 33, so that pollutants such as sodium ions, sulfur vapor and tin sulfide / tin oxide vapor can be effectively discharged in the high temperature zone, the medium temperature zone and the low temperature zone. This prevents glass defects caused by the accumulation of pollutants in the medium and low temperature zones, improves the forming quality of the glass strip, and can also balance the overall air pressure in the forming bath, improve the uniformity of air pressure, and thus improve the overall uniformity of float glass products.
[0036] Please see Figures 1 to 3 It is understandable that the first temperature zone 31 is located in the polishing zone, which is a high-temperature zone with a temperature range of 1000-1065℃. After the molten glass flows from the furnace into the tin bath shell 40, it is polished in the polishing zone by its own gravity and surface tension. The temperature in this area is relatively high, and the lateral temperature needs to be uniform to ensure that the viscosity of the molten glass is low and uniform, so that the glass can be fully spread. The first temperature zone 31 generates the most harmful gases and vapors. The initial contamination can be strongly removed through the vent pipe 10 to protect the purity of the gas at the inlet of the forming tank.
[0037] Please see Figures 1 to 3 The second temperature zone 32 is located in the forming zone and belongs to the medium temperature zone, with a temperature range of 900-780℃. The molten glass continues to cool in the forming zone and is thinned or thickened under the action of the edge-pulling machine 30. At the same time, the Na+ / S vapor released by the glass during operation can easily form pollution accumulation in the medium temperature zone. The vent pipe 10 at this location can effectively discharge harmful vapors, precisely control the gas pressure in the forming zone, stabilize the flow field in the forming tank, and continuously purify the gas in the forming zone to maintain the purity of the gas atmosphere.
[0038] Please see Figures 1 to 3Low-temperature zone: The third temperature zone 33 is located in the cooling zone, with a temperature range of 780-590℃. In this zone, the glass ribbon undergoes rapid cooling, and its viscosity increases sharply, preventing further shrinkage. The generated tin sulfide / tin oxide vapors tend to accumulate in the water bath and at the outlet, forming defects. The vent pipe 10 at this location efficiently captures harmful gases and vapors, creating a dedicated discharge channel for condensed contaminants and improving the glass quality at the outlet.
[0039] Please see Figures 1 to 3 It is understandable that the vent pipes 10 of the first temperature zone 31 are concentrated at the 0 position of the tin bath shell 40, and the vent pipes 10 of the second temperature zone 32 are arranged at the 13 position of the tin bath shell 40.
[0040] Optionally, the insulation covering layer provided on the circumferential surface of the tin bath shell 40 can be made of insulation cotton cloth with a certain mechanical strength, or any reasonable material can be selected as needed; the insulation covering layer is movably set on the circumferential surface of the tin bath shell 40, which is conducive to the insulation of the tin bath shell 40, and also facilitates the disassembly and maintenance of the damaged insulation covering layer after a period of use as needed, which is conducive to maintaining the insulation efficiency.
[0041] Please see Figures 1 to 3 In some embodiments, the number of venting tubes 10 in the second temperature zone 32 is less than the number of venting tubes 10 in the first temperature zone 31.
[0042] Optionally, by having fewer venting pipes 10 in the second temperature zone 32 than in the first temperature zone 31, the number of venting pipes 10 can be matched with the intensity of pollutant release in the temperature zone. In the high-temperature zone, pollutant discharge is strengthened to cope with the high release amount, while in the medium-temperature zone, moderate discharge is carried out to avoid excessive disturbance to the glass melt flow. This optimizes the gas purity control of the entire forming tank and reduces molten tin oxidation and defect formation.
[0043] Please see Figures 1 to 3 In some embodiments, the number of venting tubes 10 in the third temperature zone 33 is less than the number of venting tubes 10 in the first temperature zone 31, and the number of venting tubes 10 in the second temperature zone 32 is equal to the number of venting tubes 10 in the third temperature zone 33.
[0044] Optionally, by having fewer venting pipes 10 in the third temperature zone 33 than in the first temperature zone 31, the number of venting pipes 10 can be matched with the intensity of pollutant release in the temperature zone. In the high-temperature zone, pollutant discharge is strengthened to cope with the high release amount, while in the low-temperature zone, moderate discharge is carried out to avoid excessive disturbance to the glass melt flow, thereby optimizing the gas purity control of the entire forming tank and reducing tin melt oxidation and defect formation.
[0045] Please see Figures 1 to 3In some embodiments, the glass forming tin bath 100 further includes an edge-pulling machine 30, wherein the vent pipe 10 of the first temperature zone 31 and the vent pipe 10 of the second temperature zone 32 are respectively located on both sides of the edge-pulling machine 30.
[0046] Optionally, the float glass tin bath also includes an edge-pulling machine 30 to achieve traction and flattening control of the molten glass. In combination with the vent pipe 10 in the forming tank where the temperature gradually decreases, contaminants generated during the edge-pulling process can be discharged in a timely manner, ensuring stable stretching and thickness uniformity of the glass strip during the forming process, reducing defects, and improving the forming quality and product consistency of float glass.
[0047] Please see Figures 1 to 3 In some embodiments, the vent pipes 10 are arranged in pairs, and along the flow direction of the glass, the two vent pipes 10 in the same pair are located on both sides of the tin bath housing 40.
[0048] Optionally, by venting pipes 10 arranged in pairs and located on the same pair along the glass flow direction, two venting pipes 10 are respectively located on both sides of the tin bath shell 40, so as to achieve symmetrical discharge of gas on both sides of the forming tank, thereby evenly controlling the gas flow and contaminant distribution, avoiding local accumulation and tin oxidation caused by unilateral venting, and optimizing the stability and uniform cooling of the glass melt.
[0049] Please see Figures 1 to 3 Optionally, in this embodiment, the first temperature zone 31 is provided with 5 pairs of vent pipes 10, the second temperature zone 32 is provided with 1 pair of vent pipes 10, and the third temperature zone 33 is provided with 1 pair of vent pipes 10. The vent pipes 10 of the third temperature zone 33 are located at the slag removal pit to improve the convenience of ash and slag discharge at the slag removal pit. In other embodiments, the selection can be made according to the actual situation, and no restrictions are imposed here.
[0050] Please see Figures 2 to 4 In some embodiments, the vent pipe 10 includes a first pipe body 11 connected to the tin bath housing 40 and a second pipe body 12 connected to the first pipe body 11. The first pipe body 11 is arranged along a first direction, and the second pipe body 12 is arranged along a second direction. The first direction and the second direction are staggered.
[0051] Optionally, in this embodiment, the first direction is arranged horizontally and can be represented by X, and the second direction is arranged vertically and can be represented by Z.
[0052] Please see Figures 2 to 4 The first tube 11 and the second tube 12 enable the vent pipe 10 to be bent to adapt to the space of the tin bath shell 40 and the gas flow path, thereby efficiently guiding the discharge of pollutants, reducing the accumulation of harmful vapors, and preventing the formation of glass defects.
[0053] Please see Figures 2 to 4 In some embodiments, the first pipe body 11 is provided with a first flange 111, and the second pipe body 12 is provided with a second flange 121, with the first flange 111 connected to the second flange 121.
[0054] Please see Figures 2 to 4 Optionally, a reliable sealed connection between the first pipe body 11 and the second pipe body 12 is achieved by having a first flange 111 on the first pipe body 11 and a second flange 121 on the second pipe body 12, with the first flange 111 connected to the second flange 121, thereby ensuring the integrity and leak-proof nature of the gas discharge path. The first flange 111 and the second flange 121 are connected by multiple bolts and nuts, thereby improving the detachability of the first flange 111 and the second flange 121.
[0055] Please see Figures 2 to 4 In some embodiments, the first tube body 11 is formed with a first extension tube 112 in a direction away from the tin bath housing 40, and the vent tube 10 further includes a sealing assembly 13, which includes a sealing door 133 rotatably connected to the first extension tube 112 and a locking member 131.
[0056] The sealing door 133 is used to close or open the opening of the first extension pipe 112. When the sealing door 133 is closed, one end of the locking member 131 is connected to the first extension pipe 112, and the other end of the locking member 131 is engaged with the sealing door 133. When the sealing door 133 is open, the locking member 131 is disengaged from the sealing door 133, thereby enabling convenient sealing and maintenance of the vent pipe 10. This facilitates maintenance without affecting the purity of the gas in the molding tank and reduces the risk of contaminant leakage. It is understood that by opening the sealing door 133 located on the first extension pipe 112, the condensate inside the first pipe body 11 can be cleaned.
[0057] Please see Figures 2 to 4 In some embodiments, one end of the locking member 131 is rotatably connected to the first extension tube 112, the other end of the locking member 131 is provided with a locking groove, the free end of the sealing door 133 is provided with a locking post 132, and the locking member 131 is rotated by a predetermined angle so that the locking groove engages with the locking post 132.
[0058] Optionally, when the locking element 131 is in the locked sealing door 133 state, the length direction of the locking element 131 is parallel to the horizontal plane. After the locking element 131 rotates 90 degrees clockwise, the locking element 131 is released from the locking pin 132, thereby allowing the sealing door 133 to open the first extension tube 112, and vice versa. This enables a quick locking and unlocking mechanism for the sealing assembly 13, thereby improving the sealing reliability and operational convenience of the vent pipe 10.
[0059] Please see Figures 2 to 4 In some embodiments, the second tube body 12 extends downward and forms a second extension tube 122, the second extension tube 122 is provided with the sealing assembly 13, and the locking member 131 is connected to the second extension tube 122.
[0060] Please see Figures 2 to 4 Optionally, the sealing door 133 located on the second extension pipe 122 can open or close the second extension pipe 122 to achieve independent sealing control of the second extension pipe 122, thereby facilitating the discharge and collection of lower gas or condensate and improving the convenience of use.
[0061] Optionally, the cooling zone is also equipped with multiple water tanks, and the water circulation of the water tanks adopts a closed-loop circulation method.
[0062] This utility model also proposes a float glass preparation system, which includes a glass forming tin bath 100. The specific structure of the glass forming tin bath 100 is as described in the above embodiments. Since this float glass preparation system adopts all the technical solutions of all the above embodiments, it also has all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.
[0063] In some embodiments, the float glass preparation system further includes a transition roller table for receiving the glass. The transition roller table allows the glass strip to be conveyed to an annealing furnace for annealing, achieving a seamless transition from forming in the tin bath shell 40 to conveying via the roller table.
[0064] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.
Claims
1. A glass forming tin bath for forming glass in a liquid state, characterized in that, The glass forming tin bath includes: A tin bath shell has a forming tank. Glass flows into the forming tank at one end of the tin bath shell and exits from the forming tank at the other end. The forming tank has a first temperature zone, a second temperature zone, and a third temperature zone, which are arranged sequentially along the flow direction of the glass. The temperature of the first temperature zone, the second temperature zone, and the third temperature zone decreases sequentially. The gas control structure includes multiple vent pipes, each of which is connected to the tin bath shell and communicates with the molding tank. Each of the first temperature zone, the second temperature zone, and the third temperature zone is provided with at least one vent pipe.
2. The glass forming tin bath as described in claim 1, characterized in that: The number of venting tubes in the second temperature zone is less than the number of venting tubes in the first temperature zone, and / or the number of venting tubes in the third temperature zone is less than the number of venting tubes in the first temperature zone.
3. The glass forming tin bath as described in claim 1, characterized in that: The glass forming tin bath also includes an edge-pulling machine, with the vent pipe of the first temperature zone and the vent pipe of the second temperature zone located on both sides of the edge-pulling machine.
4. The glass forming tin bath as described in claim 1, characterized in that: The vent pipes are arranged in pairs, and along the flow direction of the glass, the two vent pipes in the same pair are located on both sides of the tin bath shell.
5. The glass forming tin bath as described in any one of claims 1-4, characterized in that: The vent pipe includes a first pipe body connected to the tin bath shell and a second pipe body connected to the first pipe body. The first pipe body is arranged along a first direction, and the second pipe body is arranged along a second direction. The first direction and the second direction are staggered.
6. The glass forming tin bath as described in claim 5, characterized in that: The first pipe body is provided with a first flange, and the second pipe body is provided with a second flange, with the first flange connected to the second flange.
7. The glass forming tin bath as described in claim 5, characterized in that: The first tube body has a first extension tube formed in the direction away from the tin bath shell. The vent tube also includes a sealing assembly. The sealing assembly includes a sealing door rotatably connected to the first extension tube and a locking member. The sealing door is used to close or open the opening of the first extension tube. When the sealing door is in the closed state, one end of the locking member is connected to the first extension tube, and the other end of the locking member is fastened to the sealing door.
8. The glass forming tin bath as described in claim 7, characterized in that: One end of the locking fastener is rotatably connected to the first extension tube, and the other end of the locking fastener has a fastening groove. The free end of the sealing door has a protruding locking post. The locking fastener rotates at a predetermined angle so that the fastening groove engages with the locking post.
9. The glass forming tin bath as described in claim 7, characterized in that: The second tube extends downwards and forms a second extension tube, on which the sealing assembly is provided, and the locking member is connected to the second extension tube.
10. A float glass manufacturing system, characterized in that, The float glass preparation system includes a glass forming tin bath as described in any one of claims 1-9, and further includes a transition roller table for receiving the glass.