A float glass tin bath edge pulling machine rod heat preservation structure and a using method thereof

Abstract

This invention provides a heat preservation structure for the rod of a float glass tin bath edge-pulling machine, belonging to the technical field of float glass furnaces. It includes an integrally formed triple sleeve and a rotating shaft. One end of the rotating shaft is connected to a rotating head. The triple sleeve comprises an inner tube, a middle tube, and an outer tube arranged sequentially from the inside to the outside. The rotating head is located outside the triple sleeve at the inner end of the rotating shaft. The rotating shaft has a spiral guide plate located in the liquid cooling inlet chamber. A water outlet hole connecting the liquid cooling inlet chamber and the liquid cooling reflux chamber is opened on the inner tube near the rotating head. A sealing piston one is slidably connected to the outer wall of the middle tube on the inner wall of the outer tube, and a sealing piston two is slidably connected to the outer wall of the inner tube on the inner wall of the outer tube. The outer tube has a telescopic section. An inlet hole is opened on the inner tube away from the rotating head at the end, which, when hydraulically amplified within the liquid cooling reflux chamber, connects the liquid cooling inlet chamber and the liquid cooling reflux chamber. This invention has advantages such as simple structure.

Description

Technical Field

[0001] This invention belongs to the technical field of float glass furnaces and relates to a heat preservation structure for the tin bath edge-pulling machine rod of float glass and its usage method. Background Technology

[0002] Because the smoothing and polishing of molten glass in a tin bath requires a specific temperature range, typically between 900 and 1000°C, the water-cooled edge-pulling machine rods, once inserted into the tin bath, lower the internal temperature. The more edge-pulling machines used, the greater this effect, causing the internal temperature of the tin bath to fall short of the required level for smoothing and polishing the molten glass, thus significantly reducing glass quality. While an electric heating system installed in the tin bath can raise the temperature, this would increase electricity costs.

[0003] When the edge-pulling machine is used on the inner side of the tin bath, it increases the temperature difference between the horizontal edge and the middle of the glass. This causes the same piece of glass to be subjected to different temperature fields in the horizontal direction, resulting in different degrees of plastic deformation, which will eventually cause severe ripple deformation.

[0004] Because of the low flow rate of molten glass in float glass production lines, the amount of heat carried into the tin bath by the molten glass is small. At this time, a large number of electric heaters for the tin bath are needed to supplement the heat. However, the large number of edge-pulling machines used in electronic glass production lines cause serious cooling of the tin bath, resulting in high electricity costs.

[0005] Existing technology involves wrapping a layer of ceramic fiber material around the outside of the water-cooled jacket of the edge-pulling machine rod to reduce its impact on the temperature inside the tin bath. However, due to the relatively high thermal conductivity of the material itself, it cannot provide effective heat insulation. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned problems in existing technologies by providing a heat-insulating structure for a float glass tin bath edge-pulling machine rod and its usage method. The technical problem this invention aims to solve is how to improve the cooling effect and simplify the structure.

[0007] The objective of this invention can be achieved through the following technical solution: A heat-insulating structure for a float glass tin bath edge-pulling machine rod, characterized in that it comprises an integrally formed triple sleeve and a rotating shaft, one end of which is connected to a rotating head. The triple sleeve includes an inner tube, a middle tube, and an outer tube arranged sequentially from the inside to the outside. The rotating shaft is rotatably connected to the inner tube via a bearing. A liquid-cooled inlet cavity is formed between the inner tube and the rotating shaft, a liquid-cooled reflux cavity is formed between the inner tube and the middle tube, and a negative pressure cavity is formed between the middle tube and the outer tube. The rotating head is located outside the triple sleeve at the inner end of the rotating shaft. The device has a spiral guide vane located in the liquid-cooled inlet chamber. An outlet hole connecting the liquid-cooled inlet chamber and the liquid-cooled reflux chamber is opened on the inner tube near the rotating head. A sealing piston 1 is slidably connected to the outer wall of the intermediate tube on the inner wall of the outer tube. A sealing piston 2 is slidably connected to the outer wall of the inner tube on the inner wall of the outer tube. The outer tube has a telescopic section. An inlet hole, which is hydraulically amplified in the liquid-cooled reflux chamber and connects the liquid-cooled inlet chamber and the liquid-cooled reflux chamber, is opened at the end of the inner tube away from the rotating head. The sealing piston 2 can block the inlet hole. A check valve connecting the negative pressure chamber to the outside is provided on the outer tube.

[0008] Furthermore, it also includes a heat exchange tube located at the end of the liquid-cooled inlet chamber away from the rotating head.

[0009] A method for using a heat insulation structure for a float glass tin bath edge-pulling machine rod is characterized in that a circulating refrigerant is introduced into the heat exchange tube to reduce the temperature of the coolant in the liquid-cooled inlet chamber, and the rotating shaft is driven by a drive unit to create a negative pressure environment in the negative pressure chamber. The rotating shaft is driven by a drive unit to realize the circulation of coolant between the liquid-cooled inlet chamber and the liquid-cooled return chamber.

[0010] In this design, components that cannot withstand high temperatures, such as sealing piston one, sealing piston two, check valve, and heat exchange tube, are all located away from one end of the rotating head. During the rotation of the rotating shaft, coolant is delivered to one end of the rotating head, entering the space between the inner tube and the intermediate tube through the water inlet. This causes the outer tube to stretch, creating a negative pressure in the negative pressure chamber. Simultaneously, this pushes sealing piston two to move away from the rotating head, thereby opening the water inlet and allowing the coolant to flow back into the chamber between the inner tube and the rotating shaft. In this chamber, the coolant exchanges heat with the heat exchange tube, thus reducing the coolant temperature. In this way, a heat preservation structure with both liquid cooling and vacuum insulation functions is formed. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the insulation structure of the edge-pulling machine rod.

[0012] In the diagram, 11 is the rotating shaft; 12 is the rotating head; 13 is the spiral guide plate; 14 is the water outlet; 15 is the water inlet; 21 is the inner tube; 22 is the intermediate tube; 23 is the outer tube; 31 is the liquid cooling inlet chamber; 32 is the liquid cooling reflux chamber; 33 is the negative pressure chamber; 41 is the first sealing piston; 42 is the second sealing piston; 5 is the telescopic section; 6 is the check valve; and 7 is the heat exchange tube. Detailed Implementation

[0013] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0014] like Figure 1 As shown, the insulation structure of the float glass tin bath edge-pulling machine rod includes an integrally formed triple sleeve and a rotating shaft 11. One end of the rotating shaft 11 is connected to a rotating head 12, which is located near the tin bath. The triple sleeve includes an inner tube 21, a middle tube 22, and an outer tube 23 arranged sequentially from the inside to the outside. The rotating shaft 11 is rotatably connected to the inner tube 21 via a bearing. A liquid-cooled inlet chamber 31 is formed between the inner tube 21 and the rotating shaft 11. A liquid-cooled reflux chamber 32 is formed between the inner tube 21 and the middle tube 22. A negative pressure chamber 33 is formed between the middle tube 22 and the outer tube 23. The rotating head 12 is located outside the triple sleeve at the inner end of the rotating shaft 11. The rotating shaft 11 has a spiral guide plate 13 located in the liquid-cooled inlet chamber 31. 11 The glass edge pulling operation is achieved by the driving force. The inner tube 21 near the rotating head 12 is provided with a water outlet 14 that connects the liquid cooling inlet chamber 31 and the liquid cooling return chamber 32. The inner wall of the outer tube 23 is provided with a sealing piston 41 that is slidably connected to the outer wall of the intermediate tube 22. The inner wall of the outer tube 23 is provided with a sealing piston 42 that is slidably connected to the outer wall of the inner tube 21. The outer tube 23 is provided with a telescopic section 5. The inner tube 21 away from the rotating head 12 is provided with a water inlet 15 that can be connected to the liquid cooling inlet chamber 31 and the liquid cooling return chamber 32 by hydraulic amplification. The sealing piston 42 can block the water inlet 15. The outer tube 23 is provided with a check valve 6 that connects the negative pressure chamber 33 to the outside.

[0015] It also includes a heat exchange tube 7, which is located at the end of the liquid-cooled inlet chamber 31 away from the rotating head 12. The refrigerant in the heat exchange tube 7 is cooled by the compressor. One end of the heat exchange tube 7 is connected to the liquid outlet of the compressor, and the other end of the heat exchange tube 7 flows back to the liquid inlet of the compressor to continuously cool the coolant in the inner tube 21.

[0016] In the initial state, the water inlet 15 is blocked by the sealing piston 42. However, during the rotation of the rotating shaft 11, the pressure in the liquid cooling return chamber 32 will increase, and the bellows-shaped telescopic section 5 will be stretched. At the same time, while increasing the negative pressure value in the negative pressure chamber 33, the sealing piston 42 is pushed to move to open the water inlet 15, so as to realize the circulation of coolant. In addition, the check valve 6 allows air in the negative pressure chamber 33 to overflow but does not allow outside air to enter the negative pressure chamber 33. The basic negative pressure value in the negative pressure chamber 33 can be maintained by periodically evacuating the vacuum.

[0017] In this design, components that cannot withstand high temperatures, such as sealing piston 1 41, sealing piston 2 42, check valve 6, and heat exchange tube 7, are all located away from one end of the rotating head 12. During the rotation of the rotating shaft 11, coolant is delivered to one end of the rotating head 12, entering the space between the inner tube 21 and the intermediate tube 22 through the water inlet 15. This causes the outer tube 23 to stretch, creating a negative pressure in the negative pressure chamber 33. Simultaneously, this pushes the sealing piston 2 42 to move away from the rotating head 12, thereby opening the water inlet 15. This allows the coolant to flow back into the chamber between the inner tube 21 and the rotating shaft 11, where it exchanges heat with the heat exchange tube 7 to reduce the coolant temperature. In this way, a heat-insulating structure with both liquid cooling and vacuum insulation functions is formed.

[0018] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A float glass tin mill edge roll insulation structure, characterized by, The device includes an integrally formed triple sleeve and a rotating shaft (11). One end of the rotating shaft (11) is connected to a rotating head (12). The triple sleeve includes an inner tube (21), a middle tube (22), and an outer tube (23) arranged sequentially from the inside to the outside. The rotating shaft (11) is rotatably connected to the inner tube (21) via a bearing. A liquid-cooled inlet chamber (31) is formed between the inner tube (21) and the rotating shaft (11). A liquid-cooled reflux chamber (32) is formed between the inner tube (21) and the middle tube (22). A negative pressure chamber (33) is formed between the middle tube (22) and the outer tube (23). The rotating head (12) is located outside the triple sleeve at the inner end of the rotating shaft (11). The rotating shaft (11) has a spiral guide plate (13) located in the liquid-cooled inlet chamber (31) and close to the rotating head (12). 2) An outlet hole (14) is provided on the inner tube (21) at one end, which connects the liquid cooling inlet chamber (31) and the liquid cooling return chamber (32). The inner wall of the outer tube (23) has a sealing piston one (41) that is slidably connected to the outer wall of the intermediate tube (22). The inner wall of the outer tube (23) has a sealing piston two (42) that is slidably connected to the outer wall of the inner tube (21). The outer tube (23) has a telescopic section (5). The end of the inner tube (21) away from the rotating head (12) has an inlet hole (15) that can be connected to the liquid cooling inlet chamber (31) and the liquid cooling return chamber (32) by hydraulic pressure increase. The sealing piston two (42) can block the inlet hole (15). The outer tube (23) is provided with a check valve (6) that connects the negative pressure chamber (33) and the outside.

2. The heat preservation structure for the float glass tin bath edge-pulling machine rod according to claim 1, characterized in that, It also includes a heat exchange tube (7) located at the end of the liquid-cooled inlet chamber (31) away from the rotating head (12).

3. A method of using the heat-insulating structure for the float glass tin bath edge-pulling machine rod as described in claim 2, characterized in that, A circulating refrigerant is introduced into the heat exchange tube (7) to reduce the temperature of the coolant in the liquid-cooled inlet chamber (31). The rotating shaft (11) is driven to rotate by the drive unit to create a negative pressure environment in the negative pressure chamber (33). The rotating shaft (11) is driven to rotate by the drive unit to realize the circulation of coolant between the liquid-cooled inlet chamber (31) and the liquid-cooled return chamber (32).

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