Protective gas preheating-type top cover side plate cooling device and cooling method for float tin bath

Abstract

A protective gas preheating-type top cover side plate cooling device and cooling method for a float tin bath. The cooling device comprises a plurality of protective gas preheating-type top cover side plate cooling units. Each cooling unit comprises a preheating cooler body (14). The preheating cooler body (14) is closely attached and fixed to the outer surface of one of top cover side plates (5) of a tin bath. The upper portion of the preheating cooler body (14) is provided with a gas inlet end (15), and the lower portion thereof is provided with a gas outlet end (16). The gas inlet end (15) is connected to one end of a gas inlet end ball valve (17). The other end of the gas inlet end ball valve (17) is connected to a protective gas branch pipe of the tin bath by means of a gas inlet pipe (18). The gas outlet end (16) is connected to one end of a gas outlet end ball valve (19). The other end of the gas outlet end ball valve (19) is connected to a protective gas inlet (1301) of a corresponding side seal (13) of the tin bath by means of a gas outlet pipe (20). All protective gas branch pipes are connected to a protective gas main pipe. The cooling device can preheat a protective gas in a tin bath, and can also cool top cover side plates of the tin bath, thereby reducing radiative heat dissipation of the top cover side plates.

Description

A preheating top cover side plate cooling device and cooling method for float tin bath protective gas. Technical Field

[0001] This invention belongs to the field of float glass production technology, specifically relating to a float glass tin bath protective gas preheating top cover side plate cooling device and cooling method. Background Technology

[0002] The primary function of the protective gas in the solder bath is to prevent molten solder from oxidizing and to protect the glass plates from contamination. Specifically, preventing molten solder oxidation involves the following: molten solder readily reacts with oxygen in the solder bath, leading to oxidation and contamination. Introducing a protective gas, such as a mixture of nitrogen and hydrogen, effectively isolates the molten solder from oxygen, thus preventing oxidation. Protecting the glass plates from contamination involves the following: During float glass production, the lower surface of the glass plates may become contaminated due to contact with tin and its oxides. Increasing the amount and purity of the protective gas reduces contamination, thereby improving glass quality and production efficiency. Furthermore, the protective gas in the solder bath also has a reducing effect. Specifically, when a trace amount of air enters the solder bath, the hydrogen in the protective gas reacts with residual oxygen to generate water vapor, further consuming oxygen and maintaining the purity of the molten solder. Therefore, the protective gas in the solder bath is the core of the molten solder protection system within the solder bath.

[0003] Under normal conditions, the protective gas entering the solder bath is at room temperature, while the internal space of the solder bath can reach several hundred degrees Celsius. The room-temperature protective gas is directly introduced into the solder bath through the side seal, causing intense convective heat transfer within the solder bath and adversely affecting the temperature field. Currently, the main approach to addressing the protective gas in the solder bath is through centralized or localized preheating to improve the temperature difference in critical areas.

[0004] The steel structure of the tin bath's top cover includes a top cover plate 1, which is suspended below a top cover hanging beam 3 by multiple top cover hangers 2. The top cover hanging beam 3 is supported by columns 4 at both ends. Multiple vertically arranged top cover side plates 5 are welded from front to back at the lower left and lower right ends of the top cover plate 1, as shown in Figure 1. A certain gap is left between the two adjacent top cover side plates 5 on each side of the tin bath. The breast wall bricks on each side of the tin bath are divided into upper breast wall bricks 6 and lower breast wall bricks 7, which are sequentially welded to the corresponding top cover side plates on one side of the tin bath. The inner surface of the tin bath is supported by a breast wall bracket 8, which is an angle steel. A sealing angle steel 9 is welded to the lower part of the outer surface of the top cover side plate 5. The sealing angle steel 9 cooperates with the corresponding breast wall bracket 8 to keep the top cover side plate 5 vertical. The top cover brick 10 of the tin bath is suspended below the top cover plate 1 and is arranged between the upper breast wall bricks 6 on both sides of the tin bath, as shown in Figure 2. The temperature control components of the tin bath are suspended on the top cover brick 10. Therefore, the top cover steel structure of the tin bath is the carrier of the breast wall bricks and top cover brick 10 in the tin bath, and also the carrier of the temperature control components in the tin bath. In addition, the tin bath includes a bottom 11 and side wall bricks 12 set at the left and right ends of the bottom 11. A side seal 13 is provided between the lower breast wall brick 7 and the side wall brick 12 on each side of the tin bath, as shown in Figure 2. The upper part of the side seal 13 is provided with multiple protective gas inlets 1301 and the lower part is provided with multiple operating ports 1302, as shown in Figure 3.

[0005] The lower breast wall bricks 7 on both sides of the tin bath are directly exposed to the high temperature environment inside the tin bath. As a result, the temperature of the lower breast wall bricks 7 is very high. Consequently, the temperature of the areas of the multiple top cover side plates 5 on the corresponding side of the tin bath that are in direct contact with the lower breast wall bricks 7 is also very high. The temperature of the top cover side plates 5 directly reflects the working status of the breast wall bracket 8. This is because the temperature of the breast wall bracket 8 increases with the temperature of the top cover side plates 5. The breast wall bracket 8 with increased temperature may deform, which will affect the installation firmness of the upper breast wall bricks 6 and the lower breast wall bricks 7. In addition, the temperature of the top cover side plates 5 also affects the ambient temperature around the tin bath.

[0006] Currently, there is no cooling method for the top cover side plate 5 of the tin bath, and it relies entirely on radiation heat dissipation. The temperature of the top cover side plate 5 cannot be controlled, so it is impossible to prevent the temperature of the top cover side plate 5 from being too high and affecting the working state of the breast wall bracket 8. In addition, the radiation heat dissipation of the top cover side plate 5 will cause the ambient temperature around the tin bath to rise.

[0007] Summary of the Invention

[0008] In view of the above-mentioned defects of the prior art, the present invention provides a preheating top cover side plate cooling device and cooling method for float tin bath protective gas, which can both preheat the protective gas of the tin bath and cool the top cover side plate of the tin bath to reduce the radiative heat dissipation of the top cover side plate, thereby improving the ambient temperature around the tin bath.

[0009] The technical solution adopted by this invention to solve its technical problem is:

[0010] A protective gas preheating top cover side plate cooling device for float tin bath includes multiple protective gas preheating top cover side plate cooling units. Each protective gas preheating top cover side plate cooling unit includes a preheating cooler body. The preheating cooler body is closely attached to and fixed to the outer surface of one of the top cover side plates of the tin bath, at a position directly opposite the lower breast wall brick of the corresponding side. The preheating cooler body has an air inlet at the top and an air outlet at the bottom. The air inlet is connected to one end of an air inlet ball valve, and the other end of the air inlet ball valve is connected to a protective gas branch pipe of the tin bath through an air inlet pipe. The air outlet is connected to one end of an air outlet ball valve, and the other end of the air outlet ball valve is connected to one of the protective gas inlets of the corresponding side seal of the tin bath through an air outlet pipe. Each protective gas branch pipe is connected to the protective gas main pipe.

[0011] Furthermore, the number of the protective gas preheating top cover side plate cooling units is equal to the number of top cover side plates on both sides of the tin bath, and each preheating cooler body is fixed to the outer surface of the corresponding top cover side plate.

[0012] Furthermore, the front-to-back horizontal length of the preheating cooler body is equal to the front-to-back horizontal length of the corresponding top cover side plate, the front end of the preheating cooler is aligned with the front end of the corresponding top cover side plate, and the rear end of the preheating cooler is aligned with the rear end of the corresponding top cover side plate.

[0013] Furthermore, the preheating cooler body has multiple preheating and cooling pipes arranged horizontally in the front-to-back direction from top to bottom. One end of the upper preheating and cooling pipe is connected to the corresponding end of the adjacent lower preheating and cooling pipe. The other end of the uppermost preheating and cooling pipe is the air inlet. Each preheating cooler body has multiple air outlets. The other end of the lowermost preheating and cooling pipe forms one of the air outlets. The remaining air outlets are arranged between the front and rear ends of the lowermost preheating and cooling pipe.

[0014] Furthermore, both the air inlet pipe and the air outlet pipe are flexible metal tubes, while the preheating and cooling pipe is a rigid metal tube.

[0015] Furthermore, the sum of the number of air outlets of each preheating cooler body on each side of the tin bath is equal to the number of protective gas inlets on the corresponding side seal of the tin bath. Each air outlet on each side of the tin bath is located between two adjacent protective gas inlets on the corresponding side seal of the tin bath, and between two adjacent operating ports on the corresponding side seal of the tin bath.

[0016] Furthermore, each of the preheating cooler bodies has two air outlets, with one air outlet formed at the other end of the lowermost preheating cooler pipe, and the other air outlet located at the midpoint between the front and rear ends of the lowermost preheating cooler pipe.

[0017] Furthermore, the inlet ball valve is arranged vertically and the outlet ball valve is arranged horizontally; the inlet end is connected to the lower end of the inlet ball valve, the upper end of the inlet ball valve is connected to the lower end of the inlet pipe, and the upper end of the inlet pipe is connected to the protective gas branch pipe; the outlet end is connected to one end of the outlet ball valve, the other end of the outlet ball valve is connected to the upper end of the outlet pipe, and the lower end of the outlet pipe is connected to one of the protective gas inlets of the corresponding side seal of the tin bath.

[0018] Furthermore, the upper end of the inlet ball valve is connected to the lower end of the inlet pipe via an inlet threaded connector, and the other end of the outlet ball valve is connected to the upper end of the outlet pipe via an outlet threaded connector.

[0019] A method for cooling the top cover side plate of a float tin bath using a preheated protective gas system, employing the aforementioned preheated protective gas system for cooling the top cover side plate, specifically involves: the protective gas in the main protective gas pipe sequentially enters the corresponding inlet pipe through each protective gas branch pipe; the protective gas in the inlet pipe enters the preheating cooler body through the inlet end ball valve and exchanges heat with the corresponding top cover side plate; the protective gas is preheated after heat exchange, and the corresponding top cover side plate is cooled; then the protective gas in the preheating cooler body enters the outlet pipe through the outlet end ball valve; the preheated protective gas in the outlet pipe enters the tin bath from one of the protective gas inlets sealed on the corresponding side of the tin bath.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] The float tin bath protective gas preheating top cover side plate cooling device of the present invention includes multiple protective gas preheating top cover side plate cooling units. Each protective gas preheating top cover side plate cooling unit includes a preheating cooler body. The preheating cooler body is tightly attached to and fixed to the outer surface of one of the top cover side plates of the tin bath, directly opposite the corresponding lower breast wall brick. The preheating cooler body has an air inlet at the top and an air outlet at the bottom. The air inlet is connected to one end of an air inlet ball valve, and the other end of the air inlet ball valve is connected to the protective gas branch pipe of the tin bath through an air inlet pipe. The air outlet is connected to one end of an air outlet ball valve, and the other end of the air outlet ball valve is connected to the protective gas branch pipe of the tin bath through an air outlet pipe. One of the protective gas inlets on the corresponding side seal of the solder bath is connected, and each protective gas branch pipe is connected to the protective gas main pipe. In this way, the protective gas in the protective gas main pipe enters the corresponding inlet pipe through each protective gas branch pipe in sequence. The protective gas in the inlet pipe enters the preheating cooler body through the inlet end ball valve and exchanges heat with the corresponding top cover side plate. The protective gas is preheated after heat exchange, and the corresponding top cover side plate is cooled after heat exchange. Then, the protective gas in the preheating cooler body enters the outlet pipe through the outlet end ball valve. The preheated protective gas in the outlet pipe enters the solder bath from one of the protective gas inlets on the corresponding side seal of the solder bath. Therefore, this float glass tin bath protective gas preheating top cover side plate cooling device can preheat the protective gas of the tin bath to prevent room temperature protective gas from being directly introduced into the tin bath and causing strong convective heat transfer inside the tin bath, thus preventing adverse effects on the temperature field inside the tin bath. It can also cool the top cover side plate of the tin bath to prevent the top cover side plate temperature from being too high and affecting the working state of the breast wall bracket, and reduce the radiative heat dissipation of the top cover side plate, thereby improving the ambient temperature around the tin bath. In addition, this float glass tin bath protective gas preheating top cover side plate cooling device is independently installed on the outside of the top cover side plate of the tin bath, adopting an independent modular design, which does not affect the design of the tin bath top cover steel structure body. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the steel structure of the top cover in the tin bath;

[0023] Figure 2 is a side cross-sectional view of one of the protective gas preheating top cover side plate cooling units in the float tin bath protective gas preheating top cover side plate cooling device of the present invention, arranged on the corresponding top cover side plate.

[0024] Figure 3 is a schematic diagram of the main view structure of each protective gas preheating top cover side plate cooling unit arranged on the corresponding top cover side plate.

[0025] Figure 4 is a front view enlarged structural schematic diagram of one of the protective gas preheating top cover side plate cooling units arranged on the corresponding top cover side plate;

[0026] Figure 5 is an enlarged structural schematic diagram of the main body of the preheating cooler in Figure 4.

[0027] The following are the annotations in the attached diagram: 1. Top plate of the hood; 2. Top hanging rod of the hood; 3. Hanging beam of the hood; 4. Column; 5. Side plate of the hood; 6. Upper breast wall bricks; 7. Lower breast wall bricks; 8. Breast wall bracket; 9. Sealing angle steel; 10. Top cover bricks; 11. Trench bottom; 12. Side wall bricks; 13. Side seal; 1301. Protective gas inlet; 1302. Operating port; 14. Main body of the preheater / cooler; 1401. Preheating / cooling pipe; 15. Inlet end; 16. Outlet end; 17. Inlet end ball valve; 18. Inlet pipe; 19. Outlet end ball valve; 20. Outlet pipe; 21. Inlet end threaded joint; 22. Outlet end threaded joint. Detailed Implementation

[0028] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0029] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not 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 the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0032] As shown in Figures 2-4, a protective gas preheating top cover side plate cooling device for float tin bath includes multiple protective gas preheating top cover side plate cooling units. Each protective gas preheating top cover side plate cooling unit includes a preheating cooler body 14. The preheating cooler body 14 is attached to and fixed to the outer surface of one of the top cover side plates 5 of the tin bath, at a position directly opposite the lower breast wall brick 7 of the corresponding side. The preheating cooler body 14 has an air inlet end 15 at the top and an air outlet end 16 at the bottom. The air inlet end 15 is connected to one end of the air inlet ball valve 17. The other end of the air inlet ball valve 17 is connected to the protective gas branch pipe of the tin bath through an air inlet pipe 18. The air outlet end 16 is connected to one end of the air outlet ball valve 19. The other end of the air outlet ball valve 19 is connected to one of the protective gas inlets 1301 of the corresponding side seal 13 of the tin bath through an air outlet pipe 20. Each protective gas branch pipe is connected to the protective gas main pipe.

[0033] In this way, the protective gas in the main protective gas pipe enters the corresponding air inlet pipe 18 through each protective gas branch pipe in sequence. The protective gas in the air inlet pipe 18 enters the preheating cooler body 14 through the air inlet ball valve 17 and exchanges heat with the corresponding top cover side plate 5. The protective gas is preheated after heat exchange, and the corresponding top cover side plate 5 is cooled after heat exchange. Then, the protective gas in the preheating cooler body 14 enters the air outlet pipe 20 through the air outlet ball valve 19. The preheated protective gas in the air outlet pipe 20 enters the solder bath from one of the protective gas inlets 1301 of the corresponding side seal 13 of the solder bath. Therefore, this float tin bath protective gas preheating top cover side plate cooling device can preheat the protective gas of the tin bath to prevent the protective gas at room temperature from being directly introduced into the tin bath and causing strong convective heat transfer inside the tin bath, thereby preventing adverse effects on the temperature field inside the tin bath. It can also cool the top cover side plate 5 of the tin bath to prevent the temperature of the top cover side plate 5 from being too high and affecting the working state of the breast wall bracket 8, and reduce the radiative heat dissipation of the top cover side plate 5, thereby improving the ambient temperature around the tin bath. In addition, this float tin bath protective gas preheating top cover side plate cooling device is independently installed on the outside of the top cover side plate 5 of the tin bath, adopting an independent modular design, which does not affect the design of the top cover steel structure of the tin bath.

[0034] Since the lower breast wall bricks 7 on both sides of the tin bath are directly exposed to the high temperature environment inside the tin bath, the temperature of the area in the top cover side plate 5 that is in direct contact with the lower breast wall bricks 7 is very high. In this invention, the preheating cooler body 14 is closely attached to and fixed to the outer surface of one of the top cover side plates 5 of the tin bath, directly opposite the corresponding lower breast wall brick 7. This can specifically cool the high-temperature area in the top cover side plate 5. The upper breast wall bricks 6 on both sides of the tin bath are in direct contact with the top cover brick 10 of the tin bath. The upper breast wall bricks 6 are not directly exposed to the high temperature environment inside the tin bath. Therefore, the temperature of the area in the top cover side plate 5 that is in direct contact with the upper breast wall bricks 6 is low and does not require cooling.

[0035] The function of the inlet ball valve 17 is to connect or disconnect the inlet pipe 18 from the inlet end 15 of the preheater body 14, and the function of the outlet ball valve 19 is to connect or disconnect the outlet pipe 20 from the outlet end 16 of the preheater body 14.

[0036] In this process, the glass ribbon in the tin bath flows horizontally in the front-to-back direction, while the top cover side plate 5 is arranged vertically in the front-to-back direction. The direction indicated by the hollow arrow at point B in Figures 3 and 4 is the flow direction of the glass ribbon.

[0037] In Figure 2, the direction indicated by the solid black arrow is the direction of the protective gas flow. The direction indicated by the hollow arrow at the upper end of the vent pipe 20 in Figure 2 indicates that the upper end of the vent pipe 20 needs to be connected to the vent end threaded connector 22. The direction indicated by the hollow arrow at the lower end of the vent pipe 20 in Figure 2 indicates that the lower end of the vent pipe 20 needs to be connected to one of the protective gas inlets 1301 of the corresponding side seal 13 of the tin bath.

[0038] In one embodiment, the number of protective gas preheating top cover side plate cooling units is equal to the number of top cover side plates 5 on both sides of the tin bath, and each preheating cooler body 14 is fixed to the outer surface of the corresponding top cover side plate 5. In this way, the protective gas preheating top cover side plate cooling device of this float tin bath can cool the areas of all top cover side plates 5 of the tin bath that are in direct contact with the lower breast wall bricks 7.

[0039] In one embodiment, the front-to-back horizontal length of the preheater body 14 is equal to the front-to-back horizontal length of the corresponding top cover side plate 5, the front end of the preheater is aligned with the front end of the corresponding top cover side plate 5, and the rear end of the preheater is aligned with the rear end of the corresponding top cover side plate 5. This allows the protective gas entering the preheater body 14 to fully exchange heat with the area of ​​the corresponding top cover side plate 5 that is in direct contact with the lower breast wall brick 7, thereby sufficiently cooling the area of ​​the top cover side plate 5 in direct contact with the lower breast wall brick 7.

[0040] In one embodiment, as shown in Figures 3-5, a plurality of preheating and cooling pipes 1401 are arranged horizontally in the front-back direction from top to bottom inside the preheating and cooling body 14. One end of the upper preheating and cooling pipe 1401 is connected to the corresponding end of the lower adjacent preheating and cooling pipe 1401. The other end of the uppermost preheating and cooling pipe 1401 is the air inlet 15. Each preheating and cooling body 14 has multiple air outlets 16. The other end of the lowermost preheating and cooling pipe 1401 forms one of the air outlets 16. The remaining air outlets 16 are arranged between the front and rear ends of the lowermost preheating and cooling pipe 1401. In this way, the protective gas in the intake pipe 18 enters the uppermost preheating and cooling pipe 1401 from one end through the intake ball valve 17, and then enters the adjacent lower preheating and cooling pipe 1401 from the other end. The movement path of the protective gas in the preheating and cooling unit 14 is S-shaped, so that the protective gas entering the preheating and cooling unit 14 is fully distributed in all areas of the preheating and cooling unit 14, thereby ensuring that the protective gas entering the preheating and cooling unit 14 can fully exchange heat with the corresponding top cover side plate 5. Preferably, there are more than three preheating and cooling pipes 1401 in the preheating and cooling unit 14, and the preheating and cooling pipes 1401 are square tubes with a cross-section of not less than 40mm × 40mm.

[0041] The air inlet pipe 18 and the air outlet pipe 20 are both flexible metal pipes, which makes the installation of the air inlet pipe 18 and the air outlet pipe 20 more flexible; the preheating and cooling pipe 1401 is a rigid metal pipe, which is formed by welding rectangular steel pipes or by welding steel plates.

[0042] Preferably, the sum of the number of air outlets 16 of each preheating cooler body 14 on each side of the tin bath is equal to the number of protective gas inlets 1301 on the corresponding side seal 13 of the tin bath. Each air outlet 16 on each side of the tin bath is located between two adjacent protective gas inlets 1301 on the corresponding side seal 13 of the tin bath, and between two adjacent operating ports 1302 on the corresponding side seal 13 of the tin bath.

[0043] Each preheater cooler body 14 has two air outlets 16. One air outlet 16 is formed at the other end of the lowermost preheater cooler pipe 1401, and the other air outlet 16 is arranged in the middle position between the front and rear ends of the lowermost preheater cooler pipe 1401, as shown in Figure 5.

[0044] In Figure 3-5, the solid black arrow points to the direction of the protective gas flow into the preheating cooler body 14.

[0045] In one embodiment,

[0046] As shown in Figure 2-4, the inlet ball valve 17 is arranged vertically and the outlet ball valve 19 is arranged horizontally; the inlet end 15 is connected to the lower end of the inlet ball valve 17, the upper end of the inlet ball valve 17 is connected to the lower end of the inlet pipe 18, and the upper end of the inlet pipe 18 is connected to the protective gas branch pipe; the outlet end 16 is connected to one end of the outlet ball valve 19, the other end of the outlet ball valve 19 is connected to the upper end of the outlet pipe 20, and the lower end of the outlet pipe 20 is connected to one of the protective gas inlets 1301 of the corresponding side seal 13 of the tin bath.

[0047] Preferably, as shown in Figures 2-4, the upper end of the inlet ball valve 17 is connected to the lower end of the inlet pipe 18 via the inlet threaded connector 21, and the other end of the outlet ball valve 19 is connected to the upper end of the outlet pipe 20 via the outlet threaded connector 22. In this way, the inlet threaded connector 21 can easily and quickly connect the inlet ball valve 17 to the inlet pipe 18, and the outlet threaded connector 22 can easily and quickly connect the outlet ball valve 19 to the outlet pipe 20.

[0048] In this float tin bath protective gas preheating top cover side plate cooling device, except for the preheating cooler body 14 which needs to be welded to the outer surface of the top cover side plate 5, all other components are connected by threads. The connection points between the components use standard threaded parts or machined threads to facilitate later maintenance.

[0049] A method for cooling the top cover side plate of a float tin bath using a preheated protective gas, employing the aforementioned preheated protective gas cooling device for the top cover side plate of a float tin bath, specifically involves: the protective gas in the main protective gas pipe sequentially enters the corresponding air inlet pipe 18 through each protective gas branch pipe; the protective gas in the air inlet pipe 18 enters the preheating cooler body 14 through the air inlet ball valve 17, and exchanges heat with the area of ​​the corresponding top cover side plate 5 that is in direct contact with the lower breast wall brick 7; the protective gas after heat exchange is preheated, and the area of ​​the corresponding top cover side plate 5 that is in direct contact with the lower breast wall brick 7 after heat exchange is cooled; then the protective gas in the preheating cooler body 14 enters the air outlet pipe 20 through the air outlet ball valve 19; the preheated protective gas in the air outlet pipe 20 then enters the tin bath from the corresponding protective gas inlet 1301 of the corresponding side seal 13 of the tin bath.

[0050] In summary, this float tin bath protective gas preheating top cover side plate cooling device can preheat the protective gas of the tin bath to prevent room temperature protective gas from being directly introduced into the tin bath and causing strong convective heat transfer inside the tin bath, thus preventing adverse effects on the temperature field inside the tin bath. It can also cool the top cover side plate 5 of the tin bath to prevent the temperature of the top cover side plate 5 from being too high and affecting the working state of the breast wall bracket 8, and reduce the radiative heat dissipation of the top cover side plate 5, thereby improving the ambient temperature around the tin bath. In addition, this float tin bath protective gas preheating top cover side plate cooling device is independently installed on the outside of the top cover side plate 5 of the tin bath, adopting an independent modular design, which does not affect the design of the tin bath top cover steel structure.

[0051] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A float bath tin bath protective gas preheated top hood side panel cooling apparatus characterized by: The application relates to a protective gas preheating type top cover side plate cooling unit, which comprises a preheating cooler body (14) fixed to the outer surface of one of the top cover side plates (5) of a tin bath and opposite to the corresponding side lower breast wall brick (7), wherein the upper portion of the preheating cooler body (14) is provided with an air inlet end (15) and the lower portion is provided with an air outlet end (16), the air inlet end (15) is connected with one end of an air inlet end ball valve (17), the other end of the air inlet end ball valve (17) is connected with a protective gas branch pipe of the tin bath through an air inlet pipe (18), the air outlet end (16) is connected with one end of an air outlet end ball valve (19), the other end of the air outlet end ball valve (19) is connected with one of the protective gas inlets (1301) of the corresponding side seal (13) of the tin bath through an air outlet pipe (20), and each protective gas branch pipe is connected with a protective gas main pipe.

2. A preheated top cover side panel cooling device for a float glass tin protection gas according to claim 1, characterized in that: The number of the protective gas preheating type top cover side plate cooling units is equal to the number of the top cover side plates (5) on both sides of the tin bath, and each preheating cooler body (14) is fixed to the outer surface of the corresponding top cover side plate (5).

3. A preheated top cover side panel cooling device for a float glass tin protection gas according to claim 1, characterized in that: The front-to-back horizontal length of the preheating cooler body (14) is equal to the front-to-back horizontal length of the corresponding top cover side plate (5), the front end of the preheating cooler is aligned with the front end of the corresponding top cover side plate (5), and the rear end of the preheating cooler is aligned with the rear end of the corresponding top cover side plate (5).

4. A preheated top cover side panel cooling device for a float glass tin protection gas according to claim 1, characterized in that: A plurality of preheating cooling pipes (1401) are arranged in the preheating cooler body (14) from top to bottom and horizontally along the front-to-back direction, one end of the upper preheating cooling pipe (1401) is communicated with the corresponding end of the lower preheating cooling pipe (1401), the other end of the uppermost preheating cooling pipe (1401) is the air inlet end (15), the air outlet end (16) of each preheating cooler body (14) is a plurality of air outlet ends (16), the other end of the lowermost preheating cooling pipe (1401) forms one of the air outlet ends (16), and the remaining air outlet ends (16) are arranged at positions between the front and rear ends of the lowermost preheating cooling pipe (1401).

5. A preheated top cover side panel cooling device for a float glass tin protection gas according to claim 4, characterized in that: The air inlet pipe (18) and the air outlet pipe (20) are metal flexible pipes, and the preheating cooling pipe (1401) is a metal rigid pipe.

6. A preheated top cover side panel cooling device for a float glass tin protection gas preheating type top cover side panel cooling device according to claim 5, characterized in that: The number of the air outlet ends (16) of each preheating cooler body (14) on each side of the tin bath is equal to the number of the protective gas inlets (1301) on the corresponding side seal (13) of the tin bath, each air outlet end (16) on each side of the tin bath is located between two adjacent protective gas inlets (1301) on the corresponding side seal (13) of the tin bath and between two adjacent operation openings (1302) on the corresponding side seal (13) of the tin bath.

7. A preheated top cover side panel cooling device for a float glass tin protection gas according to claim 4, characterized in that: The air outlet end (16) of each preheating cooler body (14) is two, the other end of the lowermost preheating cooling pipe (1401) forms one of the air outlet ends (16), and the other air outlet end (16) is arranged at a middle position between the front and rear ends of the lowermost preheating cooling pipe (1401).

8. A preheated top cover side panel cooling device for a float glass tin protection gas according to claim 1, characterized in that: The air inlet end ball valve (17) is vertically arranged and the air outlet end ball valve (19) is horizontally arranged; the air inlet end (15) is connected with the lower end of the air inlet end ball valve (17), the upper end of the air inlet end ball valve (17) is connected with the lower end of the air inlet pipe (18), the upper end of the air inlet pipe (18) is connected with the protective gas branch pipe, the air outlet end (16) is connected with one end of the air outlet end ball valve (19), the other end of the air outlet end ball valve (19) is connected with the upper end of the air outlet pipe (20), and the lower end of the air outlet pipe (20) is connected with one of the protective gas inlets (1301) of the corresponding side seal (13) of the tin bath.

9. A floatation tin bath shield gas preheated top cover side panel cooling device as claimed in claim 8, characterized in that: The upper end of the air inlet end ball valve (17) is connected with the lower end of the air inlet pipe (18) through the air inlet end threaded joint (21), and the other end of the air outlet end ball valve (19) is connected with the upper end of the air outlet pipe (20) through the air outlet end threaded joint (22).

10. A method of cooling the side panels of a preheated top hood of a float bath tin bath protective atmosphere, using the device for cooling the side panels of a preheated top hood of a float bath tin bath protective atmosphere according to any one of claims 1 to 8, characterized in that, Specifically, the protective gas in the protective gas main pipe enters the corresponding air inlet pipe (18) through each protective gas branch pipe in sequence, the protective gas in the air inlet pipe (18) enters the preheating cooler body (14) through the air inlet end ball valve (17) and exchanges heat with the corresponding top cover side plate (5), the protective gas after heat exchange is preheated, and the corresponding top cover side plate (5) after heat exchange is cooled, then the protective gas in the preheating cooler body (14) enters the air outlet pipe (20) through the air outlet end ball valve (19), and the preheated protective gas in the air outlet pipe (20) enters the tin bath from one of the protective gas inlets (1301) of the corresponding side seal (13) of the tin bath.

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