CN-122010399-A - Transverse temperature difference control device for glass plate in glass annealing kiln and use method

CN122010399ACN 122010399 ACN122010399 ACN 122010399ACN-122010399-A

Abstract

The invention relates to a transverse temperature difference control device for a glass plate in a glass annealing furnace and a use method thereof, comprising a pulley assembly and a partition plate assembly, wherein the pulley assembly is positioned at the top of the annealing furnace, the partition plate assembly is connected with the pulley assembly in a sliding manner, the partition plate assembly and the pulley assembly cooperate to divide the interior of the annealing furnace into a plurality of subareas, the partition plate assembly comprises heat-insulating cotton and a partition plate, the partition plate is a rectangular steel plate member with a hollow interior, and the heat-insulating cotton is positioned in the steel plate. The invention has the advantages that the partition board assembly is arranged to partition the interior of the annealing furnace, so that the mutual interference between cooling air systems in the annealing furnace is avoided, the temperature of the edges of the glass plates after the partition is easier to control, the transverse temperature in the whole annealing furnace can be ensured to be kept stable, and the glass production quality is improved.

Inventors

WU YANGUANG
LIU RUI
QIANG DENG
YE PENG
CHENG ZHONG
WANG TAO
ZHOU CHAO
SUN JIALE

Assignees

蚌埠凯盛工程技术有限公司

Dates

Publication Date: 20260512
Application Date: 20260115

Claims (10)

1. The transverse temperature difference control device for the glass plate in the glass annealing kiln is characterized by comprising a pulley assembly and a partition plate assembly, wherein the pulley assembly is positioned at the top of the annealing kiln, the partition plate assembly is connected with the pulley assembly in a sliding mode, the partition plate assembly and the pulley assembly cooperate to divide the interior of the annealing kiln into a plurality of partitions, the partition plate assembly comprises heat-insulating cotton and a partition plate, the partition plate is a rectangular steel plate component with a hollow interior, and the heat-insulating cotton is positioned in the steel plate.
2. The device for controlling the lateral temperature difference of glass sheets in a glass annealing furnace according to claim 1, wherein the partition plate assembly further comprises two groups of upper hanging plates, each group comprises two L-shaped steel plates, the sum of the widths of the shorter sides of the two L-shaped steel plates is smaller than the width of the partition plate, and the upper hanging plates are respectively positioned on two sides of the top of the partition plate to form a door shape with a sliding groove in the middle.
3. The apparatus for controlling lateral temperature differentials of glass sheets in a glass annealing lehr according to claim 2, wherein the pulley assembly comprises a web comprising a plurality of webs welded to the top of the lehr, the web width conforming to the upper hanger plate reserve chute dimensions.
4. A device for controlling the lateral temperature difference of a glass sheet in a glass annealing furnace according to claim 3, wherein the pulley assembly further comprises a plurality of pairs of pulley blocks, each pair of pulley blocks is fixed at the lower part of the connecting plate through a pin shaft, the distance between each pair of pulley blocks is smaller than the width of the partition plate, and the pulley blocks are positioned in the upper hanging plate and slide freely.
5. A device for controlling the lateral temperature difference of glass sheets in a glass annealing lehr according to claim 1, wherein the partition panel assembly comprises a plurality of dimensions, and the selection of the dimensions of the partition panel assembly is related to the dimensions of the glass sheets being processed in the lehr.
6. The apparatus for controlling lateral temperature differentials of glass sheets in a glass annealing lehr of claim 1, further comprising a cooling air system comprising a plurality of groups positioned at the top of the lehr.
7. The device for controlling the lateral temperature difference of glass sheets in a glass annealing furnace according to claim 1, further comprising a temperature control system, wherein the temperature control system comprises a plurality of groups of thermocouples, a plurality of groups of electric heating assemblies and infrared instruments, the thermocouples and the infrared instruments are positioned at the top of each group of cooling air systems, and the electric heating assemblies are positioned at two sides of the annealing furnace.
8. The apparatus of claim 6, wherein the cooling air system comprises a pneumatic butterfly valve that controls the opening of the cold air system.
9. A using method of the transverse temperature difference control device for glass plates in a glass annealing furnace is characterized by comprising the steps of firstly welding pulley assemblies at the top of the annealing furnace between a first cooling air system and a second cooling air system on the left side and the right side, secondly selecting a partition plate assembly of a proper model according to experience to be hung on the pulley assemblies, partitioning the annealing furnace, then conducting preliminary tests, observing the temperature of each partition in the annealing furnace through a thermocouple and an infrared instrument, controlling a pneumatic butterfly valve to adjust the cooling air system, adjusting an electric heating assembly until the transverse temperature in each partition is stable and meets the production standard of the float glass annealing furnace, and finally determining various parameters to start formal production.
10. The method of claim 9, wherein when the adjustment of the pneumatic butterfly valve and the electric heating component fails to realize the stable transverse temperature, the partition board model is adjusted, the preliminary test is performed again, the pneumatic butterfly valve and the electric heating component are adjusted until the stable transverse temperature is met, the production standard of the annealing kiln is met, various parameters are determined, and the formal production is started.

Description

Transverse temperature difference control device for glass plate in glass annealing kiln and use method Technical Field The invention belongs to the technical field of annealing kilns, and particularly relates to a transverse temperature difference control device for a glass plate in a glass annealing kiln and a use method thereof. Background Annealing lehr refers to an industrial apparatus for properly controlling the rate of temperature decrease after glass formation to control the thermal stress in the glass within a permissible range. The core function of the float glass lehr is to permanently relieve internal stresses during the transport of the glass from the tin bath to the cold end by precisely controlling the cooling rate of the glass. The main structure of the annealing kiln comprises a shell, an electric heating system, a cooling air system, a conveying roller way, a control system and the like. The ideal glass production state is that the glass plate sequentially passes through each heat-preserving area and each open area of the annealing kiln at a set temperature in the annealing kiln to finish the annealing process. However, because the two edges of the glass plate and the inner side plate of the kiln body and other parts have radiation and convection heat exchange, the heat dissipation area is far larger than that of the middle part of the glass plate, and the heat dissipation speed of the edges of the glass plate is far faster than that of the middle part, so that the temperature distribution pattern of 'cold edges and hot middle parts' is formed. The heat of the glass sheet is also dissipated through the rollers and cooling air system. The heat dissipated by the rollers is poorly controlled, so the annealing lehr will consider grouping cooling air systems at the beginning of the design to achieve adjustment of the lateral temperature differential of the glass sheet. However, in the float annealing furnace, when the thickness of the glass is large, the heat in the middle of the glass plate is far greater than that in the edge, or the width of the glass plate is narrowed, and the heat dissipation of the edge is too fast, many production lines can have the condition that the temperature of the edge of the glass plate is still low even if the edge cooling air system is completely closed. In order to meet the production requirements, many manufacturers have to use electrical heating to compensate for the heating of the edges of the glass sheets. This increases both the energy consumption and the control complexity, which is disadvantageous for automated control. Accordingly, there is a strong need for a method that overcomes the above-described drawbacks, thereby reducing the problem of excessive lateral temperature differentials in float glass lehr. Disclosure of Invention The invention aims to solve the problem that the transverse temperature difference of the existing float glass annealing kiln is difficult to control. The invention solves the technical problems by the following technical means: The transverse temperature difference control device for the glass plate in the glass annealing kiln comprises a pulley assembly and a partition plate assembly, wherein the pulley assembly is positioned at the top of the annealing kiln, the partition plate assembly is in sliding connection with the pulley assembly, the partition plate assembly and the pulley assembly cooperate to divide the interior of the annealing kiln into a plurality of partitions, the partition plate assembly comprises heat-insulating cotton and a partition plate, the partition plate is a rectangular steel plate member with a hollow interior, and the heat-insulating cotton is positioned in the steel plate. According to the invention, the partition board assembly is arranged to partition the interior of the annealing kiln, so that the mutual interference between cooling air systems in the annealing kiln is avoided, and after the partition, especially the edge temperature of a glass plate is easier to control, the transverse temperature in the whole annealing kiln can be ensured to be kept stable, and the glass production quality is improved. Preferably, the partition board assembly further comprises an upper hanging board, two groups of upper hanging boards are arranged, each group comprises two L-shaped steel plates, the sum of the widths of the shorter sides of the two L-shaped steel plates is smaller than the width of the partition board, the upper hanging boards are respectively located at two sides of the top of the partition board, and a door-shaped structure with a sliding groove in the middle is formed. The design of the upper hanging plate is convenient for the installation and the disassembly of the partition plate. Preferably, the pulley assembly comprises a connecting plate, the connecting plate comprises a plurality of blocks, the blocks are welded at the top of the annealing kiln, and the width of the connecting plat