Sealing structure for inlet of float glass annealing kiln

Abstract

The invention provides a float glass annealing kiln inlet sealing structure, and belongs to the technical field of float glass. Comprising a kiln body, a conveying roller way located in the kiln body, an upper sealing plate located at an inlet of the kiln body and a lower sealing plate located at the inlet of the kiln body, the upper sealing plate and the lower sealing plate are located on the upper side and the lower side of the plane where the conveying roller way is located respectively, and the upper sealing plate and the lower sealing plate are each provided with a flow guide structure; a flow guide groove is formed between every two adjacent flow guide plates, an inlet of each flow guide groove faces the inlet side of the kiln body, the width of each flow guide groove is gradually reduced from the inlet to the outlet, an outlet of each flow guide groove faces the glass plate coming direction, and the inclination angle between the air outlet airflow direction of each flow guide groove and the plate face of the glass plate is 12-50 degrees. The device has the advantages of simple structure and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of float glass production and relates to an inlet sealing structure of a float glass annealing furnace. Background Art

[0002] When using the float glass process to produce glass, the formed glass with a certain strength is lifted from the tin bath outlet and enters the slag box. It passes through the slag box transition roller and is pulled by the transmission system into the annealing kiln. It runs on the conveyor roller in the annealing kiln and is annealed before entering the finished product cutting section.

[0003] Existing technical problems:

[0004] Large openings are designed above and below the conveyor rollers at the annealing lehr entrance to accommodate glass of varying thicknesses. Due to the specific nature of the annealing process, stable airflow is required within the chamber. Large openings prevent this flow, which can cause temperature fluctuations in the annealing lehr and disrupt the stability of glass annealing. Furthermore, large openings allow air to enter the slag box connected to the annealing lehr entrance and, subsequently, the tin bath, contaminating it and impacting glass quality.

[0005] To reduce the size of the annealing lehr entrance opening, annealing lehr manufacturers design a retractable curtain above the rollers, which can be raised or lowered to provide sealing according to the thickness of the glass being produced. A fixed-height partition is also designed below the rollers for sealing. The fixed metal partition is easily deformed, and because of its fixed height, it is designed to be low to prevent contact with the conveyor rollers, resulting in poor sealing. Airflow disturbances can also easily cause the curtain to vibrate, trapping dust. Summary of the Invention

[0006] The purpose of the present invention is to provide a float glass annealing furnace inlet sealing structure in view of the above-mentioned problems existing in the prior art. The technical problem to be solved by the present invention is how to provide a turbulent annealing furnace sealing method.

[0007] The object of the present invention can be achieved through the following technical solutions: A float glass annealing furnace inlet sealing structure, comprising a kiln body, a conveyor roller located in the kiln body, an upper sealing plate located at the kiln body inlet and a lower sealing plate located at the kiln body inlet, the upper sealing plate and the lower sealing plate being respectively located on the upper and lower sides of the plane where the conveyor roller is located, characterized in that a guide structure is respectively provided at the upper sealing plate and the lower sealing plate, the guide structure comprises a plurality of guide plates, a guide groove is formed between adjacent guide plates, the inlet of the guide groove faces the inlet side of the kiln body, the width of the guide groove gradually decreases from the inlet to the outlet, the outlet of the guide groove faces the direction of the glass plate, and the outlet airflow direction of the guide groove is inclined at an angle of 12 to 50 degrees to the glass plate surface.

[0008] Affected by the straight and rapid movement of the glass plate, disturbed airflow is formed on the upper and lower sides of the glass plate surface. In addition, the temperature of the slag box connected to the annealing furnace entrance is higher than that of the annealing furnace. A certain amount of flowing airflow is formed on the upper and lower sides of the glass plate, and the overall state is flowing along the direction of glass traction. The airflow is guided by the guide structure to move along the guide groove and form a gathering state at the end of the guide groove. The airflow intensity and airflow pressure after gathering are higher than those at other positions of the slag box. Therefore, the airflow can be tilted toward the glass plate surface to form an air curtain at the "openings" on the upper and lower sides of the glass plate. The air curtain plays a sealing role, restricting the airflow in the slag box from entering the annealing furnace through the "openings". It can also impact the glass plate surface, so that the originally horizontal airflow on the glass plate surface is distributed in the longitudinal direction, so that the airflow can enter from the inlets of each longitudinally arranged guide groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the sealing structure of the annealing furnace entrance.

[0010] Figure 2 yes Figure 1 Enlarged view of part A in the middle.

[0011] In the figure, 1. kiln body; 2. conveyor roller; 3. upper sealing plate; 4. lower sealing plate; 5. guide plate. DETAILED DESCRIPTION

[0012] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0013] like Figure 1 and Figure 2 The float glass annealing furnace inlet sealing structure shown includes a kiln body 1, a conveyor roller 2 located in the kiln body 1, an upper sealing plate 3 located at the inlet of the kiln body 1, and a lower sealing plate 4 located at the inlet of the kiln body 1. The upper sealing plate 3 and the lower sealing plate 4 are respectively located on the upper and lower sides of the plane where the conveyor roller 2 is located. A guide structure is respectively provided at the upper sealing plate 3 and the lower sealing plate 4. The guide structure includes a plurality of guide plates 5 made of aluminum silicate material. A guide groove is formed between adjacent guide plates 5. The inlet of the guide groove faces the inlet side of the kiln body 1. The width of the guide groove gradually decreases from the inlet to the outlet. The outlet of the guide groove faces the direction of the glass plate. The outlet airflow direction of the guide groove is inclined at an angle of 12 to 50 degrees to the surface of the glass plate.

[0014] Affected by the straight and rapid movement of the glass plate, disturbed airflow is formed on the upper and lower sides of the glass plate surface. In addition, the temperature of the slag box connected to the annealing furnace entrance is higher than that of the annealing furnace. A certain amount of flowing airflow is formed on the upper and lower sides of the glass plate, and the overall state is flowing along the direction of glass traction. The airflow is guided by the guide structure to move along the guide groove and form a gathering state at the end of the guide groove. The airflow intensity and airflow pressure after gathering are higher than those at other positions of the slag box. Therefore, the airflow can be tilted toward the glass plate surface to form an air curtain at the "openings" on the upper and lower sides of the glass plate. The air curtain plays a sealing role, restricting the airflow in the slag box from entering the annealing furnace through the "openings". It can also impact the glass plate surface, so that the originally horizontal airflow on the glass plate surface is distributed in the longitudinal direction, so that the airflow can enter from the inlets of each longitudinally arranged guide groove.

[0015] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A float glass annealing furnace inlet sealing structure, comprising a kiln body (1), a conveying roller (2) located in the kiln body (1), an upper sealing plate (3) located at the inlet of the kiln body (1), and a lower sealing plate (4) located at the inlet of the kiln body (1), wherein the upper sealing plate (3) and the lower sealing plate (4) are respectively located on the upper and lower sides of the plane where the conveying roller (2) is located, and characterized in that: A guide structure is respectively provided at the upper sealing plate (3) and the lower sealing plate (4), and the guide structure includes a plurality of guide plates (5). A guide groove is formed between adjacent guide plates (5). The inlet of the guide groove faces the inlet side of the kiln body (1). The width of the guide groove gradually decreases from the inlet to the outlet. The outlet of the guide groove faces the direction of the glass plate. The outlet airflow direction of the guide groove forms an inclination angle of 12 to 50 degrees with the surface of the glass plate.

2. The float glass annealing furnace inlet sealing structure according to claim 1, characterized in that: The guide plate (5) is an aluminum silicate plate.

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