Device for reducing temperature difference of overflow bricks

Abstract

The utility model provides a device for reducing the temperature difference of overflow bricks, and belongs to the technical field of substrate glass production. Steel pipes are arranged at four corners below an external furnace body steel structure of the muffle furnace, the steel pipes penetrate through a muffle furnace body, and porcelain pipes are sleeved in the steel pipes. A large plywood, a first small plywood and a second small plywood are further arranged in the muffle furnace, are all arranged below the overflow bricks, and are all flush with the steel pipes. The large plywood, the first small plywood and the second small plywood are all stainless steel plywood. Compared with the prior art, the device effectively solves the problems that in the prior art, the temperature difference of the overflow brick can only be controlled within a safety range, the effect that the temperature of the overflow brick body is uniform cannot be achieved, and consequently certain hidden dangers exist in the later-period service life and production quality of the overflow brick.

Description

Technical Field

[0001] The utility model belongs to the technical field of substrate glass production, and particularly relates to a device for reducing the temperature difference of overflow bricks. Background Art

[0002] Substrate glass, a thin sheet of glass with an extremely smooth surface, is a key building block in the flat panel display industry. Currently, it is one of the most widely used and fastest-growing specialty glass types in microelectronics, optoelectronics, and new energy technologies, and a crucial raw material for liquid crystal display panels.

[0003] At the beginning of the substrate glass production line, the forming heating equipment needs to be set according to the process, and the temperature needs to be raised from room temperature until it meets the process requirements. Then, infiltration and process adjustments are performed, and the product is produced after the process adjustment.

[0004] The three furnaces in the molding heating equipment—the muffle furnace, the forming furnace, and the annealing furnace—heat up simultaneously, with different target temperatures, ranging from high to low. During the initial heating phase of the molding heating equipment, the temperature difference between the top and bottom overflow bricks in the muffle furnace is controlled by the heating rates of the forming furnace and annealing furnace. Even after the forming furnace and annealing furnace reach their target temperatures, the muffle furnace continues to heat up. As the temperature rises, the hot gas inside the furnace expands and floats upward. The excessively high temperature of the steel cover plate at the top of the muffle furnace can cause deformation, compromising the furnace's sealing. Furthermore, the temperature difference between the top and bottom overflow bricks, as well as the near-center and far-center temperature differences, gradually increases. Uneven temperatures within the overflow bricks lead to uneven expansion and contraction within the high-temperature chamber, reducing the safety factor.

[0005] Currently, the existing forming heating equipment uses auxiliary heating elements to control the temperature difference of the overflow bricks. It can only control the temperature difference of the overflow bricks within a safe range and cannot achieve the effect of uniform temperature of the overflow brick body, which will lead to certain hidden dangers in the later service life and production quality of the overflow bricks.

[0006] In summary, the existing forming heating equipment can only control the temperature difference of the overflow bricks within a safe range, and cannot achieve the effect of uniform temperature of the overflow brick body, resulting in certain hidden dangers in the later service life and production quality of the overflow bricks. Utility Model Content

[0007] The purpose of the utility model is to provide a device for reducing the temperature difference of overflow bricks, so as to solve the problem that the prior art can only control the temperature difference of overflow bricks within a safe range, but cannot achieve the effect of uniform temperature of the overflow brick body, resulting in certain hidden dangers in the later service life and production quality of the overflow bricks.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] In a first aspect, the utility model provides a device for reducing the temperature difference of overflow bricks. Steel pipes are provided at the four corners below the outer furnace body steel structure of the muffle furnace. The steel pipes penetrate the muffle furnace body, and porcelain tubes are sleeved inside the steel pipes.

[0010] A further improvement of the present invention is that a large plywood, a first small plywood and a second small plywood are further provided inside the muffle furnace, and the large plywood, the first small plywood and the second small plywood are all arranged below the overflow brick, and the large plywood, the first small plywood and the second small plywood are all flush with the position of the steel pipe.

[0011] A further improvement of the present invention is that the large plywood, the first small plywood and the second small plywood are all stainless steel plywood.

[0012] A further improvement of the present invention is that the steel pipes are symmetrically arranged at the four corners below the outer furnace body steel structure of the muffle furnace.

[0013] A further improvement of the present invention is that the steel pipes arranged at the four corners below the outer furnace body steel structure of the muffle furnace are all round steel pipes or square steel pipes.

[0014] A further improvement of the present invention is that the length of the steel pipe ranges from 100 mm to 200 mm.

[0015] A further improvement of the present invention is that the port of the steel pipe is provided with thermal insulation cotton.

[0016] A further improvement of the present invention is that a porcelain ring is further provided on the porcelain tube.

[0017] A further improvement of the present invention is that the length of the porcelain tube ranges from 300 mm to 500 mm.

[0018] A further improvement of the present invention is that the inner diameter of the porcelain tube is in the range of 2mm-4mm, and the outer diameter is in the range of 4mm-6mm.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The device for reducing the temperature difference of overflow bricks proposed in the present invention is provided with steel pipes at the four corners below the outer furnace body steel structure of the muffle furnace. The steel pipes penetrate the muffle furnace body, and porcelain pipes are sleeved inside the steel pipes. It can be seen that the present invention utilizes the porcelain pipes sleeved inside the steel pipes to keep the flow direction of the hot air flow in the furnace stable, thereby ensuring the heat at the far and near ends of the overflow brick tips, balancing the temperature around the overflow bricks, and thus achieving the purpose of rapid temperature increase. Compared with the existing technology, the present invention effectively solves the problem in the existing technology that the temperature difference of the overflow bricks can only be controlled within a safe range, and the temperature of the overflow brick body cannot be uniformed, resulting in certain hidden dangers in the later service life and production quality of the overflow bricks. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a planar cross-sectional view of a device for reducing the temperature difference of overflow bricks according to the present invention;

[0022] Figure 2 This is a three-dimensional diagram of a device for reducing the temperature difference of overflow bricks according to the utility model;

[0023] Figure 3 This is a schematic diagram of the porcelain tube structure in the device for reducing the temperature difference of overflow bricks in the utility model;

[0024] Figure 4 A top view of the hot air flow of the device for reducing the temperature difference of overflow bricks according to the utility model;

[0025] Figure 5 A side view of the hot air flow of the device for reducing the temperature difference of overflow bricks according to the utility model;

[0026] In the figure: 1. Large plywood; 2. Muffle furnace; 3. Forming furnace; 4. First small plywood; 5. Overflow brick; 6. Second small plywood; 7. Steel pipe; 8. Porcelain tube; 9. Porcelain ring; 10. Heating element; 11. Direction of hot air flow. DETAILED DESCRIPTION

[0027] In order to further understand the content of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the embodiments are merely for explanation of the present invention and are not intended to limit the present invention.

[0028] This utility model proposes a device for reducing the temperature difference of overflow bricks. Steel pipes are installed at the four corners below the outer steel structure of the muffle furnace. The steel pipes extend through the muffle furnace body and are internally connected to porcelain tubes. Compared with the existing technology, this utility model effectively solves the problem that the existing technology can only control the temperature difference of overflow bricks within a safe range, but cannot achieve the effect of uniform temperature of the overflow brick body, which may cause certain risks to the service life and production quality of the overflow bricks in the later stage.

[0029] Embodiments of a device for reducing the temperature difference of overflow bricks:

[0030] The planar cross-sectional view and stereoscopic view of the device for reducing the temperature difference of overflow bricks of the utility model are as follows Figure 1 and Figure 2 As shown, the technical solution of the utility model is specifically described as follows:

[0031] Steel pipes 7 are installed at the four corners below the outer steel structure of the muffle furnace 2. These pipes 7 run through the muffle furnace 2 and are used to guide the airflow within the muffle furnace 2. They also balance the temperature differences (upper and lower, near-center, and far-center) of the overflow bricks 5, thereby ensuring the safety of the overflow bricks 5. The steel pipes 7 are symmetrically arranged at the four corners below the outer steel structure of the muffle furnace 2. The steel pipes 7 installed at the four corners below the outer steel structure of the muffle furnace 2 are either circular or square. This embodiment uses circular steel pipes as an example.

[0032] The interior of the steel pipe 7 is sheathed with a porcelain pipe 8 for conveying water vapor and impurity combustion gases in the furnace. A porcelain ring 9 is also provided on the porcelain pipe 8 to limit the depth of the porcelain pipe 8 inserted into the steel pipe 7. Figure 3 shown.

[0033] The port of the steel pipe 7 is provided with thermal insulation cotton, which is used to seal the port of the steel pipe 7 after the heating equipment finishes heating. According to actual process requirements, the thermal insulation cotton can be removed when the steel pipe 7 is used.

[0034] The above-mentioned upper and lower temperature difference refers to the difference between the temperature of the upper portion of the overflow brick 5 and the temperature of the lower portion of the overflow brick 5, the near-middle temperature difference refers to the difference between the temperature of the near end of the overflow brick 5 and the middle portion of the overflow brick 5, and the far-middle temperature difference refers to the difference between the temperature of the far end of the overflow brick 5 and the middle portion of the overflow brick 5. The near end of the overflow brick 5 refers to the end on the lower left side of the interior of the muffle furnace 2 where the through hole is opened, and the far end of the overflow brick 5 refers to the end on the lower right side of the interior of the muffle furnace 2 where the through hole is opened.

[0035] The interior of the muffle furnace 2 is also provided with a large plywood 1, a first small plywood 4, and a second small plywood 6. The large plywood 1, the first small plywood 4, and the second small plywood 6 are all arranged below the overflow brick 5. The large plywood 1, the first small plywood 4, and the second small plywood 6 are all flush with the steel pipe 7 to prevent the temperature of the brick tip of the overflow brick 5 from losing too quickly. In this embodiment, the large plywood 1, the first small plywood 4, and the second small plywood 6 are all stainless steel plywood.

[0036] In this embodiment, the steel tube 7 has a length ranging from 100 mm to 200 mm, an inner diameter ranging from 6 mm to 8 mm, and an outer diameter ranging from 12 mm to 15 mm. The porcelain tube 8 has a length ranging from 300 mm to 500 mm, an inner diameter ranging from 2 mm to 4 mm, and an outer diameter ranging from 4 mm to 6 mm.

[0037] The specific working principle of the device for reducing the temperature difference of overflow bricks in the utility model is described as follows:

[0038] Insert the porcelain tube 8 into the steel tube 7, and the heating element 10 (the heating element 10 is installed on the furnace body and combined with the furnace body steel structure) starts to heat up from room temperature, and the water vapor and impurity combustion gas in the furnace are continuously discharged through the porcelain tube 8. As the temperature in the furnace rises, the volume of the hot gas in the furnace expands, and a pressure difference is formed inside and outside the furnace body. The hot gas in the furnace flows along the direction of the porcelain tube 8 at the four corners of the forming furnace 3, changing the flow direction 11 of part of the rising hot gas, reducing the upper and lower temperature difference of the overflow brick 5, avoiding the deformation of the furnace body steel structure at the top of the furnace, and also ensuring that the heat at the four corners of the furnace body is balanced with the heat in the middle, thereby reducing the near-center temperature difference and the far-center temperature difference of the overflow brick 5. The top view and side view of the hot gas flow direction are shown as follows: Figure 4 and Figure 5 shown.

Claims

1. A device for reducing the temperature difference of overflow bricks, characterized in that: Steel pipes (7) are provided at the four corners below the outer furnace body steel structure of the muffle furnace (2). The steel pipes (7) penetrate the furnace body of the muffle furnace (2), and the interior of the steel pipes (7) is sleeved with porcelain tubes (8).

2. The device for reducing the temperature difference of overflow bricks according to claim 1, characterized in that: A large plywood (1), a first small plywood (4), and a second small plywood (6) are further provided inside the muffle furnace (2); the large plywood (1), the first small plywood (4), and the second small plywood (6) are all provided below the overflow brick (5); and the large plywood (1), the first small plywood (4), and the second small plywood (6) are all flush with the steel pipe (7).

3. The device for reducing the temperature difference of overflow bricks according to claim 2, characterized in that: The large plywood (1), the first small plywood (4) and the second small plywood (6) are all made of stainless steel plywood.

4. The device for reducing the temperature difference of overflow bricks according to claim 1, characterized in that: The steel pipes (7) are symmetrically arranged at the four corners below the outer furnace body steel structure of the muffle furnace (2).

5. The device for reducing the temperature difference of overflow bricks according to claim 1, characterized in that: The steel pipes (7) provided at the four corners below the outer furnace body steel structure of the muffle furnace (2) are all circular steel pipes or square steel pipes.

6. The device for reducing the temperature difference of overflow bricks according to claim 1, characterized in that: The length of the steel pipe (7) ranges from 100 mm to 200 mm.

7. The device for reducing the temperature difference of overflow bricks according to claim 1, characterized in that: The end of the steel pipe (7) is provided with heat-insulating cotton.

8. The device for reducing the temperature difference of overflow bricks according to claim 1, characterized in that: A porcelain ring (9) is also provided on the porcelain tube (8).

9. The device for reducing the temperature difference of overflow bricks according to claim 1, characterized in that: The length of the porcelain tube (8) ranges from 300 mm to 500 mm.

10. The device for reducing the temperature difference of overflow bricks according to claim 1, characterized in that: The inner diameter of the porcelain tube (8) is in the range of 2mm-4mm, and the outer diameter is in the range of 4mm-6mm.

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