The present invention relates to a tempering and cooling system of a tempered glass production line, in particular to a system which uses chillers to firstly temper a high-temperature glass plate and then cool the glass plate after tempering.
At present, as shown in
The glass plate always takes the time as control reference in the quenching and cooling section 3 regardless of the tempering process or the cooling process, namely the time for completing tempering or cooling of the glass plate is estimated by multiplying the thickness of the glass plate by a time base. The processing method is obtained by summarization according to experience. In order to prevent the problem that the quality of a finished product of the glass plate is affected by insufficient tempering or cooling time, the tempering time or the cooling time is generally prolonged, namely after the glass plate achieves the temperature of the tempering point or the temperature of the cooling point, tempering or cooling is continuously performed. In such a way, although the quality of the finished product of the glass plate can be ensured, the waste of energy is caused; and when the glass plate with a different specification is processed, the tempering time and the cooling time need to be re-estimated, so that the process becomes complex and errors are easy to cause, and the mass production of tempered glass is further adversely affected.
Based on the above reasons, in order to reduce the production energy consumption and improve the quality of the finished product of the glass plate, the applicant improves the tempering and cooling system of the tempered glass production line after long-term test, improvement, research and development.
It should be noted that:
1. The temperature of the tempering point of the glass plate refers to the temperature value which is 50-250° C. lower than the temperature of a strain point of the glass plate (the temperature forming permanent stress of the glass plate).
2. The temperature of the cooling point of the glass plate refers to the temperature value of the glass plate, which is cooled to room temperature (+0-50° C.) after the tempering process.
3. The temperature of the strain point of the glass plate is equivalent to the temperature when the viscosity is 1013.6 poises, and the temperature of the strain point of an ordinary flat glass plate is 510-520° C. At the temperature, the glass plate does not produce viscous flow, and the internal stress of the glass plate can be substantially eliminated by performing heat insulation for 4 h.
Invention Contents
Against the problems in the prior art, the present invention provides a tempering and cooling system for tempered glass. The tempering and cooling system breaks the inertial thinking of controlling a glass plate in a tempering stage or a cooling stage by calculating time in an existing mature process. The time of the tempering stage or the cooling stage is controlled by monitoring the temperature of the upper surface and/or the lower surface of the glass plate, after the surface temperature of the glass plate drops to the temperature of a tempering point, the glass plate enters the cooling stage from the tempering stage, and after the temperature of the glass plate drops to the temperature of the cooling point, the cooling is stopped, so that the waste of energy consumption is avoided, the noise is reduced, the process is simplified, the working condition of a fan is improved and the service life of the fan is prolonged.
In order to realize the above purpose, the present invention provides a tempering and cooling system for tempered glass. The tempering and cooling system is arranged on a quenching and cooling section of a tempered glass production line, wherein the quenching and cooling section includes roller tables and chillers, a glass plate is arranged on the roller tables, a temperature sensor for collecting surface temperature of the glass plate is arranged above and/or below the roller tables, and a tempering process and/or a cooling process of the glass plate is controlled according to the surface temperature of the glass plate detected by the temperature sensor; in a tempering stage of the glass plate, when the surface temperature of the glass plate drops to the temperature of a tempering point, the glass plate enters a cooling stage; and in the cooling stage of the glass plate, when the surface temperature of the glass plate drops to the temperature of a cooling point, the cooling is stopped.
Further, one or at least two temperature sensors are equipped above and/or below the roller tables, and the time when the tempering stage is ended and the time when the cooling stage of the glass plate is ended are determined according to the maximum value of the temperature detected by all the temperature sensors every time.
Further, the temperature sensor is a oscillating-type temperature sensor, and the temperature sensor is used for scanning the surface of the glass plate by oscillating during working to collect the surface temperature of the glass plate in a glass plate region covered by a scanning range.
Further, the temperature sensor can 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 by reciprocating movement during working to collect the surface temperature of the glass plate in a glass plate region covered by a scanning range.
Further, the temperature sensor is mounted on the chillers.
Further, the temperature sensor is an infrared temperature measurement unit.
The present invention has the advantages that, the limited thinking of a traditional process is broken, the surface temperature of the glass plate is collected by using the temperature sensor, and the tempering and the cooling processes are controlled according to the surface temperature of the glass plate, thereby enabling the time used for tempering or cooling of the glass plate to be more precious, not only reducing the energy consumption in the production process of the tempered glass, but also improving the quality of finished tempered glass and facilitating mass production.
In conjunction with the accompanying drawings, the specific embodiments of the present invention are described below in detail.
As shown in
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The temperature sensor 5 may be arranged above the glass plate 7 as shown in
By referring to
Referring to
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.
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.
Number | Date | Country | Kind |
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201410205432.6 | May 2014 | CN | national |
Filing Document | Filing Date | Country | Kind |
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PCT/CN2015/078935 | 5/14/2015 | WO | 00 |