Tempering and Cooling System for a Tempered Glass

Abstract

This application discloses a tempering and cooling system for a glass plate. The system comprises a roller table to convey the glass plate, wind gratings to blow air to reduce a surface temperature of the glass plate, and a temperature sensor arranged above and/or below the roller table to detect the surface temperature and enable the system to control a tempering process and/or a cooling process of the glass plate according to the detected surface temperature. The system controls the wind gratings to: produce a first wind pressure when the glass plate is in a tempering stage; produce a second wind pressure when the system determines the detected surface temperature drops to a temperature of a tempering point such that the glass plate enters a cooling stage; produce a third wind pressure when the system determines the detected surface temperature drops to a temperature of a cooling point.

Claims

1. A tempering and cooling system for a glass plate, comprising: a roller table to convey the glass plate from a heating furnace towards an unloading table; a first wind grating to blow air to reduce a surface temperature of the glass plate; and at least one temperature sensor, arranged above and/or below the glass plate, to detect the surface temperature of the glass plate and enable the tempering and cooling system to control a tempering process and/or a cooling process of the glass plate according to the detected surface temperature; wherein the tempering and cooling system controls the tempering process and/or the cooling process of the glass plate by controlling a fan rotation speed of the first wind grating based on the detected surface temperature to: produce a first wind pressure when the glass plate is in a tempering stage; produce a second wind pressure upon the detected surface temperature dropping to a temperature of a tempering point such that the glass plate enters a cooling stage; and produce a third wind pressure lower than the second wind pressure upon the detected surface temperature dropping to a temperature of a cooling point.

2. The tempering and cooling system according to claim 1, wherein more than one temperature sensors are equipped above and/or below the glass plate; and the tempering and cooling system determines a time when the tempering stage is ended and a time when the cooling stage of the glass plate is ended according to a maximum value of temperatures detected by the more than one temperature sensors every time.

3. The tempering and cooling system according to claim 1, wherein the at least one temperature sensor is a swing-type temperature sensor, and the at least one temperature sensor is used for scanning the surface of the glass plate by swinging during working to detect the surface temperature of the glass plate in a glass plate region covered by a scanning range.

4. The tempering and cooling system according to claim 1, wherein the at least one temperature sensor reciprocates in parallel to a surface of the glass plate and scan the surface of the glass plate by a reciprocating movement during working to detect the surface temperature of the glass plate in a glass plate region covered by a scanning range.

5. The tempering and cooling system according to claim 1, wherein the at least one temperature sensor is mounted on the first wind grating.

6. The tempering and cooling system according to claim 1, wherein the at least one temperature sensor is an infrared temperature measurement unit.

7. The tempering and cooling system according to claim 1, comprising: a second wind grating, corresponding to the first wind grating, to blow air to reduce the surface temperature of the glass plate; wherein: the tempering and cooling system controls the tempering process and/or the cooling process of the glass plate by controlling a respective fan rotation speed of the first and second wind gratings based on the detected surface temperature.

8. The tempering and cooling system according to claim 1, wherein the third wind pressure is zero or near zero.

9. The tempering and cooling system according to claim 1, wherein the tempering and cooling system controls the tempering process and/or the cooling process of the glass plate by controlling the first wind pressure and the second wind pressure based on a thickness of the glass plate.

10. The tempering and cooling system according to claim 1, wherein upon the detected surface temperature dropping to a temperature of a cooling point, the tempering and cooling system stops the cooling process and controls the roller table to convey the glass plate to the unloading table.

11. The tempering and cooling system according to claim 1, wherein: the tempering and cooling system controls the fan rotation speed of the first wind grating to produce the first wind pressure based on a thickness of the glass plate when the glass plate is in the tempering stage.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG. 1 is a schematic diagram of an existing tempered glass production line;

[0019] FIG. 2 is a schematic diagram of the structure of a tempering and cooling system in the present invention;

[0020] FIG. 3 is a schematic diagram of one temperature sensor equipped in the present invention;

[0021] FIG. 4 is a schematic diagram of a plurality of temperature sensors equipped in the present invention;

[0022] FIG. 5 is a schematic diagram of oscillating of a temperature sensor around a set axis in the present invention; and

[0023] FIG. 6 is a schematic diagram of movement of a temperature sensor along a set path in the present invention.

DETAILED DESCRIPTION

[0024] In conjunction with the accompanying drawings, the specific embodiments of the present invention are described below in detail.

[0025] As shown in FIG. 2, a tempering and cooling system for tempered glass of the present invention is arranged in a quenching and cooling section of a tempered glass production line and specifically includes roller tables 8 for connecting a glass plate heating furnace 2 and an unloading table 4 (see FIG. 1), wherein a glass plate 7 is arranged on the roller tables 8, the glass plate 7 is sent to the unloading table 4 by the roller tables 8 along an arrow A in the figure, an upper wind grating 6 is arranged above the glass plate 7, a lower wind grating 9 is arranged below the glass plate 7, and the upper wind grating 6 and the lower wind grating 9 are in one-to-one correspondence. Temperature sensors 5 are arranged above the glass plate 7, the temperature sensors 5 are mounted at the top of the upper wind grating 6 and is used for collecting the temperature of the upper surface of the glass plate 7, and the temperature sensor 5 is preferably an infrared temperature measurement unit.

[0026] As shown in FIG. 3, the glass plate 7 moves along the A direction, one temperature sensor 5 is arranged above the glass plate 7, the temperature sensor 5 is used for collecting the temperature of the glass plate along the B-C direction, and the B-C direction is vertical to the motion direction A of the glass plate 7.

[0027] As shown in FIG. 4, the glass plate 7 moves along the A direction, a plurality of temperature sensors 5 are arranged above the glass plate 7, wherein 12 temperature sensors 5 are specifically equipped in the figure. The temperature sensors 5 are arranged in a matrix mode, and are used for collecting the temperature of the glass plate along the B-C direction which is vertical to the motion A direction of the glass plate 7.

[0028] As shown in FIG. 5, the temperature sensor 5 is an oscillating-type temperature sensor, and the temperature sensor is used for scanning the surface of the glass plate by oscillating around a set axis during working to collect the surface temperature of the glass plate 7 in a glass plate region covered by a scanning range.

[0029] As shown in FIG. 6, the temperature sensor 5 may be mounted in the quenching and cooling section in a way of performing reciprocating movement parallel to the surface of the glass plate and is used for scanning the surface of the glass plate 7 by reciprocating movement during working to collect the surface temperature of the glass plate 7 in a glass plate region covered by a scanning range.

[0030] The temperature sensor 5 may be arranged above the glass plate 7 as shown in FIGS. 2-6, and of course, may also be arranged below the glass plate 7 (not shown); or the temperature sensors 5 are arranged above and below the glass plate 7 (not shown).

Embodiment 1

[0031] By referring to FIGS. 1, 2, 4 and 5, a glass plate 7 sequentially passes through a loading table 1 and a heating furnace 2 and enters a quenching and cooling section 3, and then the glass plate 7 performs single-way motion towards an unloading table 4 on roller tables 8, namely moves along the A direction. In a tempering stage, an upper wind grating 6 and a lower wind grating 9 produce relatively large air pressure to rapidly cool and temper the glass plate 7, 12 temperature sensors 5 are distributed above the glass plate 7 in a matrix mode, each temperature sensor 5 is used for collecting the temperature of the upper surface of the glass plate 7 by continuous oscillating as shown in FIG. 5, after the temperature of the upper surface of the glass plate 7 is collected every time, the maximum value of the collected temperature is compared with the temperature of a tempering point required by the process, and if the temperature drops to the temperature of the tempering point, the glass plates enters a cooling stage; and after the glass plate enters the cooling stage, the air pressure in the tempering stage can be continuously kept, the air pressure can also be reduced, the temperature sensors 5 are continuously used for detecting the temperature of the upper surface of the glass plate 7, after the temperature of the upper surface of the glass plate 7 is collected every time, whether the cooling process is completed or not is judged according to the maximum value of the collected temperature, and if the temperature drops to the temperature of a cooling point, it means that the whole cooling process is completed, then the cooling is stopped and the glass plate 7 is sent to the unloading table 4 by the roller tables 8.

Embodiment 2

[0032] Referring to FIGS. 1, 3 and 6, embodiment 2 is basically the same as embodiment 1, and the differences are as follows: in the whole cooling process, the glass plate 7 performs reciprocating motion on the roller tables 8, one temperature sensor 5 is equipped above the glass plate 7, and the temperature sensor 5 may be mounted in a quenching and cooling section in a way of performing reciprocating movement parallel to the surface of the glass plate, as shown in FIG. 6. In FIG. 6, specifically, the temperature sensor 5 can perform continuous reciprocating movement along the direction vertical to the traveling direction of the glass plate 7 to scan the surface of the glass plate, thereby collecting the surface temperature of the glass plate in a glass plate region covered by a scanning range.

Embodiment 3

[0033]

TABLE-US-00001 Set temperaure Set Thinkness Tempering of Cooling air temperature Serial of glass air pressure tempering pressure of cooling number plate (mm) (Pa) point ( C.) (Pa) point ( C.) Sample 1 4 7500 380 2000 60 Sample 2 5 3200 380 1500 60 Sample 3 6 1800 380 1600 60 Sample 4 8 750 380 1600 60 Sample 5 10 600 380 1600 60 Sample 6 12 400 380 1500 60 Sample 7 15 200 380 1500 60 Sample 8 19 200 380 1500 60

[0034] In the embodiment, the glass plates with 8 different thicknesses are respectively tempered by tempering air pressures with 8 different strengths in the tempering stage, and when the temperature sensor detects that the temperature of the upper surface of each glass plate achieves the temperature of the tempering point, i.e. 380 C., the glass plates enter the cooling stage; and in the cooling stage, the glass plates are cooled by cooling air pressures with different strengths, and when the temperature sensor detects that the temperature of the upper surface of each glass plate drops to the temperature of the cooling point, i.e. 60 C., the cooling is stopped, and the glass plates are sent to the unloading table.

[0035] The above examples are only used for describing the present invention, and the embodiments of the present invention are not limited to these examples. Various specific embodiments which are made by those skilled in the art and are in line with the thinking of the present invention are within the scope of protection of the present invention.