A float glass forming apparatus

Abstract

This invention provides a float glass forming apparatus, including a tin bath, a cover, an air inlet pipe, and an impurity attachment assembly. The tin bath has an open top, and the cover covers the open end of the tin bath. The air inlet pipe is fixedly connected to the cover and communicates with the tin bath. The impurity attachment assembly is provided inside the tin bath, and includes multiple guide bricks and multiple positioning bricks. The guide bricks have main flow holes and suction holes. One end of the suction hole communicates with the main flow hole, and the other end communicates with the tin bath. The positioning bricks have transition guide holes. The multiple guide bricks and multiple positioning bricks are arranged alternately along the width direction of the milling groove, and all main flow holes and all transition guide holes are interconnected. Using the technical solution of this invention, impurity components in the tin bath are vaporized to generate impurity gas. When the impurity gas rises, it is guided to the left and right sides of the tin bath. When the impurity gas condenses back into a solid after heat exchange, the solid impurities are adsorbed into the main flow holes or transition guide holes, preventing solid impurities from falling into the molten glass.

Description

Technical Field

[0001] This invention belongs to the field of glass production technology, and in particular to a float glass forming apparatus. Background Technology

[0002] The float glass process is currently the mainstream technology for forming flat glass. The core of the float glass process involves continuously flowing molten glass onto the surface of molten tin, where it floats. Gravity and surface tension flatten it into a glass ribbon of uniform thickness and a smooth surface. This ribbon is then annealed and cut to produce float glass. Float glass is characterized by its smooth surface, excellent optical properties, good uniformity, and suitability for large-scale continuous production, making it the mainstream technology for flat glass production worldwide, accounting for 80%-90%. In the float glass process, the process of the molten glass floating and forming in the tin bath is extremely critical. Tin's melting point is typically above 1600℃. Under high temperatures, tin is easily oxidized by oxygen in the air to form tin compounds. If these tin compounds are mixed in with the molten glass, they will affect the quality of the formed glass.

[0003] In the prior art, patent document with publication number "CN113912268A" discloses a method for reducing tin diffusion on the lower surface during float glass manufacturing. This method involves preparing a float polishing medium by mixing metallic tin and metallic sodium in a specific ratio. Sodium, being a strong reducing agent, can absorb oxidizing components in the tin bath, protecting the molten tin from oxidation and reducing the concentration of tin ions in the molten tin. Furthermore, after absorbing oxidizing components and being oxidized into sodium ions, sodium increases the concentration of sodium ions in the molten tin. These two effects slow down the ion exchange reaction between tin ions in the molten tin and sodium ions in the glass. Using this patented technology reduces the amount of tin diffusion on the lower surface of the glass, thus improving the quality of flat glass products to a certain extent.

[0004] However, glass float forming equipment generally includes a tin bath and a cover. The tin bath is open at the top, and the cover is fitted over the open end of the tin bath. In the process of the molten glass floating and forming in the tin bath, in order to prevent the molten glass from being oxidized by oxygen in the air, an air inlet pipe is usually set at the centroid of the cover. The air inlet pipe is connected to a gas source and sends protective gas into the tin bath. The protective gas generally includes nitrogen and hydrogen. Nitrogen is used to remove oxygen in the tin bath, and hydrogen is used to create a reducing atmosphere in the tin bath. However, because the tin bath cannot be completely sealed or the tin bath has poor sealing, or because air has been mixed in with the molten glass in the previous process, some molten glass will still be oxidized. Because the temperature in the tin bath is extremely high, the oxidized tin dioxide and other impurities vaporize and move upward. When they exchange heat with the protective gas, the impurity gas will condense back into a solid state and fall vertically downward into the molten glass, affecting the glass forming quality. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a float glass forming apparatus.

[0006] The present invention is achieved through the following technical solutions.

[0007] This invention provides a float glass forming apparatus, including a tin bath, a cover, an air inlet pipe, and an auxiliary component. The tin bath has an open upper end, and the cover covers the open end of the tin bath. The air inlet pipe is fixedly connected to the cover and communicates with the tin bath. An auxiliary component is provided inside the tin bath. The auxiliary component includes multiple guide bricks and multiple positioning bricks. The guide bricks have main flow holes and suction holes. One end of the suction hole communicates with the main flow hole, and the other end of the suction hole communicates with the tin bath. The positioning bricks have transition guide holes. The multiple guide bricks and multiple positioning bricks are arranged alternately along the width direction of the milling groove, and all the main flow holes and all the transition guide holes are interconnected.

[0008] The positioning brick is fixedly connected to one end of the hanging rod, and the other end of the hanging rod is fixedly connected to the cover. The positioning brick is provided with a support platform on both the left and right sides, and the guide brick overlaps on the corresponding support platform of two adjacent positioning bricks.

[0009] The boom can be replaced by a fully threaded screw or a double-ended screw.

[0010] All the main flow holes and all the transition guide holes are interconnected and form a transverse adsorption channel. The axial trajectory of the transverse adsorption channel is a curved segment or broken line segment that is high in the middle and low at both ends.

[0011] The inner wall of the tin bath is also fixedly connected to the support. The auxiliary component also includes a wall-mounted brick, which is placed on the support. The wall-mounted brick has a secondary guide hole inside. One end of the secondary guide hole is connected to the main guide hole or the transition guide hole, and the other end of the secondary guide hole is connected to the tin bath.

[0012] The inner wall surfaces of the main flow orifice, transition flow orifice, and secondary flow orifice are each provided with several adsorption grooves.

[0013] The axial trajectory of the secondary guide hole is a broken line segment that undergoes at least two bends.

[0014] The inner wall of the tin bath is also provided with vent holes.

[0015] The float glass forming apparatus further includes a base, a surrounding column, a crossbeam, a first tie rod, a positioning plate, and a second tie rod. The tin bath is supported on the surface of the base. The base is fixedly connected to one end of the surrounding column, and the other end of the surrounding column is fixedly connected to the crossbeam. The crossbeam is also fixedly connected to one end of the first tie rod, and the other end of the first tie rod is fixedly connected to the positioning plate. The positioning plate is also fixedly connected to one end of the second tie rod, and the other end of the second tie rod is fixedly connected to the cover.

[0016] The first or second tie rod can be replaced by a fully threaded screw or a double-ended screw.

[0017] The beneficial effects of this invention are as follows: Using the technical solution of this invention, in the float glass forming process, protective gas is continuously supplied to the tin bath through the air inlet pipe. The protective gas enters the tin bath through the gaps at the edges of the impurity components and the gaps between the guide vane and the positioning brick, and gradually disperses throughout the internal space of the tin bath. Simultaneously, impurity components in the tin bath vaporize to generate impurity gas. When the impurity gas rises, it can enter the main flow hole or transition guide hole through the suction hole. Guided by the main flow hole or transition guide hole, the impurity gas enters the left and right edges of the tin bath. If the impurity gas condenses into a solid state during its flow, the impurities will be adsorbed into the main flow hole, transition guide hole, and secondary guide hole, thereby preventing impurities from falling vertically into the molten glass and improving the glass forming quality. Attached Figure Description

[0018] Figure 1 This is the front view of the present invention; Figure 2 This is a schematic diagram of the transverse adsorption channel and the secondary guide hole of the present invention; Figure 3 This is a front view of the flow guide brick of the present invention; Figure 4 This is a left view of the flow guide brick of the present invention; Figure 5 This is a front view of the positioning brick of the present invention; Figure 6 This is a left view of the positioning brick of the present invention; Figure 7 This is a front view of the wall-mounted bricks of the present invention; Figure 8 This is a right view of the wall-mounted brick of the present invention; Figure 9 This is a schematic cross-sectional view of the main flow hole of the present invention.

[0019] In the diagram: 1-tin bath, 2-cover, 3-air inlet pipe, 4-attached components, 5-guide brick, 6-positioning brick, 7-main flow hole, 8-suction hole, 9-transition guide hole, 10-hanging rod, 11-support, 12-wall-attached brick, 13-secondary guide hole, 14-adsorption tank, 15-exhaust hole, 16-base, 17-column, 18-beam, 19-first tie rod, 20-positioning plate, 21-second tie rod, 22-support platform. Detailed Implementation

[0020] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0021] like Figures 1 to 9As shown, the present invention provides a float glass forming apparatus, including a tin bath 1, a cover 2, an air inlet pipe 3, and an auxiliary component 4. The upper end of the tin bath 1 is open, and the cover 2 covers the open end of the tin bath 1. The air inlet pipe 3 is fixedly connected to the cover 2 and communicates with the tin bath 1. The auxiliary component 4 is provided inside the tin bath 1. The auxiliary component 4 includes multiple guide bricks 5 and multiple positioning bricks 6. The guide bricks 5 are provided with main flow holes 7 and suction holes 8. One end of the suction hole 8 is connected to the main flow hole 7, and the other end of the suction hole 8 is connected to the tin bath 1. The positioning bricks 6 are provided with transition guide holes 9. The multiple guide bricks 5 and the multiple positioning bricks 6 are arranged alternately along the width direction of the milling groove, and all the main flow holes 7 and all the transition guide holes 9 are interconnected.

[0022] Using the technical solution of this invention, in the float glass forming process, protective gas is continuously fed into the tin bath through the air inlet pipe. The protective gas enters the tin bath through the gaps on the edge of the impurity component and the gaps between the guide vane and the positioning brick, and gradually disperses throughout the internal space of the tin bath. At the same time, the impurity components in the tin bath are vaporized to generate impurity gas. When the impurity gas rises, it can enter the main flow hole or the transition guide hole through the air intake hole. Under the guidance of the main flow hole or the transition guide hole, the impurity gas enters the left and right edges of the tin bath. If the impurity gas condenses into a solid state during the flow process, the impurities will be adsorbed into the main flow hole, the transition guide hole and the secondary guide hole, thereby preventing the impurities from falling vertically into the glass melt and improving the glass forming quality.

[0023] Specifically, there are multiple impurity components 4, which are arranged in a linear array along the length of the tin bath 1 within the milling groove. One end of the positioning brick 6 is fixedly connected to the hanger 10, and the other end of the hanger 10 is fixedly connected to the cover 2. Supports 22 are provided on both the left and right sides of the positioning brick 6, and the guide brick 5 overlaps on the corresponding supports 22 of two adjacent positioning bricks 6. The hanger 10 can be replaced by a fully threaded screw or a double-ended screw. Using the technical solution of this invention, the relative height between each guide brick 5, positioning brick 6, and the molten tin surface can be adjusted, thereby adjusting the flow direction of the impurity gas and adapting to different production conditions.

[0024] In addition, all the main flow holes 7 and all the transition guide holes 9 are interconnected and form a transverse adsorption channel. The axial trajectory of the transverse adsorption channel is a curved segment or broken line segment that is high in the middle and low at both ends.

[0025] Furthermore, the inner wall of the tin bath 1 is fixedly connected to the support 11. The impurity attachment assembly 4 also includes a wall-mounted brick 12, which rests on the support 11. The wall-mounted brick 12 has a secondary guide hole 13 inside. One end of the secondary guide hole 13 is connected to the main guide hole 7 or the transition guide hole 9, and the other end of the secondary guide hole 13 is connected to the tin bath 1. By adopting the technical solution of the present invention, the impurity gas is guided to the vicinity of the inner wall of the left and right sides of the tin bath through the main guide hole and the transition guide hole. By setting the wall-mounted brick 12 and its secondary guide hole 13, the impurity gas is fully adsorbed on the inner wall of the secondary guide hole 13. Since the secondary guide hole 13 is set near the inner wall of the left and right sides of the tin bath, it completely prevents impurities from falling into the glass melt, thereby improving the glass forming quality.

[0026] Specifically, the inner walls of the main flow channel 7, the transition guide channel 9, and the secondary flow channel 13 are each provided with several adsorption grooves 14. Preferably, the cross-section of the adsorption groove 14 is rectangular. The axial trajectory of the secondary flow channel 13 is a broken line segment that has undergone at least two bends. The inner wall of the tin bath 1 is also provided with venting holes 15.

[0027] Furthermore, the float glass forming apparatus also includes a base 16, a supporting column 17, a crossbeam 18, a first tie rod 19, a positioning plate 20, and a second tie rod 21. The tin bath 1 is supported on the surface of the base 16. The base 16 is fixedly connected to one end of the supporting column 17, and the other end of the supporting column 17 is fixedly connected to the crossbeam 18. The crossbeam 18 is also fixedly connected to one end of the first tie rod 19, and the other end of the first tie rod 19 is fixedly connected to the positioning plate 20. The positioning plate 20 is also fixedly connected to one end of the second tie rod 21, and the other end of the second tie rod 21 is fixedly connected to the housing 2. Preferably, the first tie rod 19 or the second tie rod 21 can be replaced by a fully threaded screw or a double-ended screw.

[0028] When using the float glass forming apparatus, molten tin is first filled into the tin bath 1. During the process of the molten glass flowing along the length of the tin bath 1 and forming, protective gas is continuously supplied into the tin bath 1 through the air inlet pipe 3. At the same time, the impurity components in the tin bath 1 are vaporized to generate impurity gas. The impurity gas enters the main flow hole 7 or the transition guide hole 9 through the air intake hole 8. The impurity gas condenses and is adsorbed in the main flow hole 7 or the transition guide hole 9, thereby preventing impurities from falling vertically into the molten glass and improving the glass forming quality. Specifically, the protective gas includes nitrogen and hydrogen.

Claims

1. A float glass forming apparatus, characterized in that: The device includes a tin bath (1), a cover (2), an air inlet pipe (3), and an auxiliary component (4). The tin bath (1) has an open top, and the cover (2) covers the open end of the tin bath (1). The air inlet pipe (3) is fixedly connected to the cover (2) and communicates with the tin bath (1). The auxiliary component (4) is provided inside the tin bath (1). The auxiliary component (4) includes multiple guide bricks (5) and multiple positioning bricks (6). The guide bricks (5) are provided with a main flow hole (7) and an air intake hole (8). One end of the air intake hole (8) is connected to the main flow hole (7), and the other end of the air intake hole (8) is connected to the tin bath (1). The positioning bricks (6) are provided with transition guide holes (9). The multiple guide bricks (5) and the multiple positioning bricks (6) are arranged alternately along the width direction of the milling groove, and all the main flow holes (7) and all the transition guide holes (9) are interconnected.

2. The float glass forming apparatus as described in claim 1, characterized in that: The positioning brick (6) is fixedly connected to one end of the hanging rod (10), and the other end of the hanging rod (10) is fixedly connected to the cover (2). The positioning brick (6) is provided with support platforms (22) on both the left and right sides. The guide brick (5) overlaps on the corresponding support platforms (22) of two adjacent positioning bricks (6).

3. The float glass forming apparatus as described in claim 2, characterized in that: The lifting rod (10) can be replaced by a fully threaded screw or a double-ended screw.

4. The float glass forming apparatus as described in claim 1, characterized in that: All the main flow holes (7) are interconnected with all the transition guide holes (9) and form a transverse adsorption channel. The axial trajectory of the transverse adsorption channel is a curved segment or broken line segment that is high in the middle and low at both ends.

5. The float glass forming apparatus as described in claim 1, characterized in that: The inner wall of the tin bath (1) is also fixedly connected to the support (11). The auxiliary component (4) also includes a wall-mounted brick (12), which is placed on the support (11). The wall-mounted brick (12) is provided with a secondary guide hole (13). One end of the secondary guide hole (13) is connected to the main guide hole (7) or the transition guide hole (9), and the other end of the secondary guide hole (13) is connected to the tin bath (1).

6. The float glass forming apparatus as described in claim 5, characterized in that: The inner walls of the main flow hole (7), the transition flow hole (9) and the secondary flow hole (13) are each provided with a number of adsorption grooves (14).

7. A float glass forming apparatus as described in claim 5 or 6, characterized in that: The axial trajectory of the secondary guide hole (13) is a broken line segment that has undergone at least two bends.

8. The float glass forming apparatus as described in claim 1, characterized in that: The inner wall of the tin bath (1) is also provided with an exhaust hole (15).

9. A float glass forming apparatus as described in claim 1, characterized in that: The float glass forming apparatus further includes a base (16), a column (17), a crossbeam (18), a first tie rod (19), a positioning plate (20), and a second tie rod (21). The tin bath (1) is supported on the surface of the base (16). The base (16) is fixedly connected to one end of the column (17), and the other end of the column (17) is fixedly connected to the crossbeam (18). The crossbeam (18) is also fixedly connected to one end of the first tie rod (19), and the other end of the first tie rod (19) is fixedly connected to the positioning plate (20). The positioning plate (20) is also fixedly connected to one end of the second tie rod (21), and the other end of the second tie rod (21) is fixedly connected to the cover (2).

10. A float glass forming apparatus as described in claim 9, characterized in that: The first tie rod (19) or the second tie rod (21) can be replaced by a fully threaded screw or a double-ended screw.

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