WO2019047522A1 - Procédé de chauffage de vitre par convection - Google Patents

Procédé de chauffage de vitre par convection Download PDF

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Publication number
WO2019047522A1
WO2019047522A1 PCT/CN2018/082665 CN2018082665W WO2019047522A1 WO 2019047522 A1 WO2019047522 A1 WO 2019047522A1 CN 2018082665 W CN2018082665 W CN 2018082665W WO 2019047522 A1 WO2019047522 A1 WO 2019047522A1
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WO
WIPO (PCT)
Prior art keywords
glass plate
high temperature
temperature fan
during
rotation speed
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Application number
PCT/CN2018/082665
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English (en)
Chinese (zh)
Inventor
赵雁
窦高峰
Original Assignee
洛阳兰迪玻璃机器股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 洛阳兰迪玻璃机器股份有限公司 filed Critical 洛阳兰迪玻璃机器股份有限公司
Publication of WO2019047522A1 publication Critical patent/WO2019047522A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B27/00—Tempering or quenching glass products
    • C03B27/012—Tempering or quenching glass products by heat treatment, e.g. for crystallisation; Heat treatment of glass products before tempering by cooling

Definitions

  • the invention belongs to the field of glass processing, and particularly relates to a convection heating method for a glass plate, which is used for controlling the convection heating process of the glass plate in the heating furnace.
  • Convection heating is a method of spraying a glass plate with a high-temperature gas to heat the glass plate.
  • the advantage is that the heating efficiency is high, especially when heating the low-emission coated glass plate.
  • the high temperature fan 3 sprays high temperature gas onto the surface of the glass plate 8 at a certain rotational speed, and at the same time, the glass plate 8 reciprocates in the direction indicated by the arrow on the roller table. It is gradually heated during exercise. As shown in FIG.
  • the operation process of the high temperature fan 3 is divided into several heating stages according to the heating time of the glass plate, and the high temperature fan 3 operates at a constant rotational speed in each heating stage, which is only exemplary.
  • a rotation speed control mode of the high temperature fan 3 is shown, that is, as the heating time elapses, the rotation speed of the high temperature fan 3 in each of the above heating stages is continuously reduced.
  • the deceleration motion is started until the stationary motion continues in the opposite direction.
  • the high temperature and high pressure gas are continuously sprayed on the fixed area of the surface of the glass plate, and it is very easy to form hot spots on the glass plate 8.
  • the heated glass plate is cooled by tempering, a hot spot is formed. Significant stress spots appear in the area, which seriously affects the finished product quality of tempered glass.
  • the object of the present invention is to provide a convection heating method for a glass plate, which is used for controlling the convection heating process of the glass plate in the heating furnace to avoid the formation of hot spots in the heating process of the glass, and effectively reducing the surface of the glass plate after tempering. Stress spots improve the quality of finished products of tempered glass.
  • the technical solution adopted by the present invention is: a glass plate convection heating method for controlling the convection heating process of the glass plate in the heating furnace, in the convection heating process, the glass plate is in the heating furnace Reciprocating between the two end points of the moving path on the inner roller path; during a reciprocating cycle, defining the decelerating motion of the glass plate toward the two end points until the stationary and moving away from the two end points is accelerated.
  • the reversing process of the glass plate defines that the movement process of the glass plate on the roller table except the reversing process is the operation process of the glass plate; during the operation of the glass plate, the high temperature fan operates at the set rotation speed and runs on the glass plate During the process and/or during the commutation process, the rotational speed of the high temperature fan is lowered, so that when the glass plate is stationary at the end of the motion path, the rotation speed of the high temperature fan is smaller than the average rotation speed of the high temperature fan during the operation of the glass plate.
  • the rotation speed of the high temperature fan is lowered, so that the rotation speed of the high temperature fan is smaller than that of the high temperature fan when the glass plate is stationary at the two end points of the moving path.
  • the average rotational speed during the operation of the board is 100 mm to 800 mm.
  • the rotation speed of the high temperature fan is lowered during the process of 1 second to 8 seconds, so that the rotation speed of the high temperature fan is lower than that of the high temperature fan when the glass plate is stationary at the two end points of the moving path.
  • the average rotational speed during operation of the glass sheet is lowered during the process of 1 second to 8 seconds, so that the rotation speed of the high temperature fan is lower than that of the high temperature fan when the glass plate is stationary at the two end points of the moving path.
  • the rotational speed of the high temperature fan is adjusted by a frequency converter connected to the high temperature fan.
  • the roller is provided with an encoder, and the encoder sends the movement and position information of the glass plate on the roller table to the control unit of the heating furnace, and the control unit sends a signal to the inverter according to the movement and position information of the glass plate. To adjust the rotation speed of the high temperature fan.
  • the rotation speed of the high temperature fan is not more than 100 rpm; during the operation of the glass plate, the average rotation speed of the high temperature fan is 100 rpm to 3000 rpm.
  • a reciprocating cycle refers to a process in which a glass plate reciprocates between two end points of a moving path, and the glass plate starts from a certain point of the moving path, passes through two end points, and returns to the point again.
  • the glass plate When the glass plate is subjected to convection heating by the method of the present invention, the glass is avoided by adjusting and reducing the rotational speed of the high temperature fan before decelerating in the direction of the left end and the right end of the moving path and before stationary.
  • the high temperature and high pressure gas are continuously sprayed on the fixed area of the surface of the glass plate, thereby forming hot spots on the glass plate, effectively reducing the stress spots on the surface of the glass plate after tempering, and improving the stress spot.
  • the finished product quality of tempered glass When the glass plate is subjected to convection heating by the method of the present invention, the glass is avoided by adjusting and reducing the rotational speed of the high temperature fan before decelerating in the direction of the left end and the right end of the moving path and before stationary.
  • Figure 1 is a schematic view showing a state in which the glass plate is at the left end of the roller path in the heating furnace
  • Figure 2 is a schematic view showing a state in which the glass plate is at the right end of the roller path in the heating furnace;
  • FIG. 3 is a graph showing a rotational speed of a high temperature fan in the prior art
  • the glass plate 8 reciprocates between the left end point 7 and the right end point 5; the glass plate 8 is defined to be oriented in the direction of approaching the two end points.
  • the process of decelerating motion until the stationary and away from the two end points is accelerated.
  • the process of reversing the glass plate 8 defines the operation of the glass plate 8 on the roller table 2 except for the reversing process.
  • the high temperature fan 3 operates at a set rotational speed, and the rotational speed of the high temperature blower 3 is lowered during operation of the glass plate 8 and/or during the commutation process so that the glass plate 8 is in the path of motion.
  • the rotation speed of the high temperature fan 3 is smaller than the average rotation speed of the high temperature fan 3 during the operation of the glass plate 8.
  • the glass plate 8 is at the end of the running process until the glass plate 8 is reversed.
  • the rotation speed of the high temperature fan 3 is continuously lowered, so that when the glass plate 8 is stationary at the left end point 7 of the movement path, the rotation speed of the high temperature fan 3 is 30 rpm, 50 rpm, or 100 rpm; 8
  • the glass plate 8 is at the end of the running process until the glass plate 8 is continuously reduced during the commutation process.
  • the rotational speed of the high temperature blower 3 is such that when the glass plate 8 is stationary at the left end point 7 of the moving path, the rotational speed of the high temperature blower 3 is 30 rpm, 50 rpm, or 100 rpm.
  • the high temperature fan 3 continues to operate at the set rotation speed, and the average rotation speed of the high temperature fan 3 during the operation of the glass plate 8 is 2000 rpm.
  • the set rotational speed of the high temperature blower 3 during the operation of the glass plate 8 may be a constant value or may vary with time, and is an average rotational speed of 100 rpm to 3000 rpm, but is preferably constant. value.
  • the rotation speed of the high-temperature fan 3 is adjusted by the inverter connected thereto; the roller 2 of the heating furnace is provided with an encoder, and the encoder is electrically connected with the control unit of the heating furnace, and when working, coding
  • the device sends the movement and position information of the glass plate 8 on the roller table 2 to the control unit of the heating furnace 1.
  • the control unit sends a signal to the frequency converter to adjust the rotation speed of the high temperature fan 3 according to the movement and position of the glass plate 8. .
  • This embodiment is basically the same as Embodiment 1, except that during the movement of the glass plate 8 to the left end point 7, when the distance from the front end of the glass plate 8 to the left end point 7 of the movement path is 100 mm, at this time, the glass plate 8 During the reversing process, the rotation speed of the high temperature fan 3 is lowered, so that when the glass plate 8 is stationary at the left end point 7 of the movement path, the rotation speed of the high temperature fan 3 is 30 rpm, 50 rpm, or 100 rpm; During the movement of the glass plate to the right end point 5, when the distance between the front end of the glass plate 8 and the right end point 5 of the moving path is 100 mm, at this time, the glass plate 8 is in the process of reversing, and the rotation speed of the high temperature fan 3 is lowered to make the glass When the plate 8 is stationary at the left end point 7 of the movement path, the rotation speed of the high temperature fan 3 is 30 rpm, 50 rpm or 100 rpm. When the glass plate 8
  • the glass plate 8 reciprocates between the left end point 7 and the right end point 5; the glass plate 8 is defined to be oriented in the direction of approaching the two end points.
  • the process of decelerating motion until the stationary and away from the two end points is accelerated.
  • the process of reversing the glass plate 8 defines the operation of the glass plate 8 on the roller table except for the reversing process.
  • the high temperature fan 3 operates at a set rotational speed, reducing the rotational speed of the high temperature fan 3 during operation of the glass plate 8 and/or during the commutation, such that the glass plate 8 is stationary at the end of the path of motion At this time, the rotational speed of the high temperature blower 3 is smaller than the average rotational speed of the high temperature blower 3 during the operation of the glass plate 8.
  • the glass plate 8 is at the end of the running process until the glass plate 8 is reversing, continuing
  • the rotation speed of the high temperature fan 3 is lowered so that the rotation speed of the high temperature fan 3 is 30 rpm, 50 rpm, or 100 rpm when the left end 7 of the movement path is stationary; the glass plate 8 is to the right end.
  • the glass plate 8 is at the end of the running process until the glass plate 8 is reversed, and the rotation speed of the high temperature fan 3 is continuously lowered.
  • the high-speed fan 3 has a rotational speed of 30 rpm, 50 rpm, or 100 rpm.
  • the high temperature fan 3 continues to operate at the set rotation speed, and the average rotation speed of the high temperature fan 3 during the operation of the glass plate 8 is 1000 rpm.
  • the rotational speed of the high temperature blower 3 during operation of the glass sheet 8 may be constant or may vary over time, but is preferably constant.
  • the rotational speed of the high temperature blower 3 is adjusted by the frequency converter connected thereto, and the control unit sends a signal to the frequency converter in advance according to the movement of the glass plate 8 and the time of reaching the left end point 7 and the right end point 5 The rotational speed of the high temperature blower 3 is adjusted.
  • This embodiment is basically the same as Embodiment 3 except that the glass plate 8 is in the process of moving to the left end point 7, and 3 seconds before the front end of the glass plate 8 reaches the left end point 7 of the moving path, at this time, the glass plate 8 is at During the reversing process, the rotation speed of the high temperature fan 3 is lowered, so that the rotation speed of the high temperature fan 3 is 30 rpm, 50 rpm, or 100 rpm when the glass plate 8 is stationary at the left end point 7 of the movement path; During the movement of the plate 8 to the right end point 5, 3 seconds before the front end of the glass plate 8 reaches the right end point 5 of the movement path, at this time, the glass plate 8 is in the process of reversing, reducing the rotation speed of the high temperature fan 3, so that the glass plate 8 When the left end point 7 of the motion path is stationary, the rotational speed of the high temperature blower 3 is 30 rpm, 50 rpm, or 100 rpm.
  • the high temperature fan 3 continues to operate at the set rotation speed, and the average rotation speed of the high temperature fan 3 during the operation of the glass plate 8 is 400 rpm.
  • the rotational speed of the high temperature blower 3 during the operation of the glass plate 8 may be a constant value or may vary with time, and is an average rotational speed of 100 rpm to 3000 rpm, but is preferably a constant value.

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Abstract

L'invention concerne un procédé de chauffage de vitre par convection. Dans un processus de chauffage par convection, une vitre alterne entre deux points d'extrémité d'un trajet de mouvement sur un lit à rouleaux dans un four de chauffage. Dans un cycle d'alternance, le processus par lequel la vitre décélère dans une direction s'approchant des deux points d'extrémité jusqu'à devenir stationnaire, puis accélère dans une direction s'éloignant des deux points d'extrémité est désigné par un processus d'inversion de la vitre, et des processus de déplacement de la vitre sur le lit à rouleaux autres que le processus d'inversion sont désignés par des processus opérationnels de la vitre. Pendant les processus opérationnels de la vitre, un ventilateur à haute température fonctionne à une vitesse de rotation de consigne, et la vitesse de rotation du ventilateur à haute température est réduite pendant les processus opérationnels et/ou pendant le processus d'inversion de la vitre, de telle sorte que lorsque la vitre repose à l'extrémité du trajet de mouvement, la vitesse de rotation du ventilateur à haute température est inférieure à une vitesse de rotation moyenne du ventilateur à haute température pendant les processus opérationnels de la vitre.
PCT/CN2018/082665 2017-09-07 2018-04-11 Procédé de chauffage de vitre par convection WO2019047522A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710801851.X 2017-09-07
CN201710801851.XA CN107572764A (zh) 2017-09-07 2017-09-07 一种玻璃板对流式加热方法

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WO2019047522A1 true WO2019047522A1 (fr) 2019-03-14

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107572764A (zh) * 2017-09-07 2018-01-12 洛阳兰迪玻璃机器股份有限公司 一种玻璃板对流式加热方法

Citations (6)

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EP0078135A1 (fr) * 1981-10-23 1983-05-04 McMaster, Harold Ashley Procédé de régulation du chauffage d'un matériau en feuille dans un four à convoyeur
CN1802323A (zh) * 2003-06-11 2006-07-12 玻璃机械设备有限公司 在用于玻璃板的硬化炉中观测玻璃并控制热效应的方法
CN101052594A (zh) * 2004-09-07 2007-10-10 单玻璃工程公司 用于加热玻璃板的方法和设备
CN102344242A (zh) * 2011-07-21 2012-02-08 杭州精工机械有限公司 数控对流混合辐射加热方式的加热炉及加热方法
EP2141132B1 (fr) * 2008-07-02 2012-12-05 Astero Four
CN107572764A (zh) * 2017-09-07 2018-01-12 洛阳兰迪玻璃机器股份有限公司 一种玻璃板对流式加热方法

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Publication number Priority date Publication date Assignee Title
CN1843988A (zh) * 2006-04-07 2006-10-11 无锡市新惠玻璃制品有限责任公司 一种薄玻璃物理钢化的生产工艺
CN102503099A (zh) * 2011-10-31 2012-06-20 中山市格兰特实业有限公司火炬分公司 一种4-6mm 的LOW-E 玻璃的钢化加工方法
CN103319082B (zh) * 2013-06-27 2015-09-16 长治市晟龙实业有限公司 超薄热强化玻璃的制造方法
CN103601359A (zh) * 2013-08-14 2014-02-26 浙江鼎玻自动化设备有限公司 一种玻璃钢化阶段消除风斑的方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0078135A1 (fr) * 1981-10-23 1983-05-04 McMaster, Harold Ashley Procédé de régulation du chauffage d'un matériau en feuille dans un four à convoyeur
CN1802323A (zh) * 2003-06-11 2006-07-12 玻璃机械设备有限公司 在用于玻璃板的硬化炉中观测玻璃并控制热效应的方法
CN101052594A (zh) * 2004-09-07 2007-10-10 单玻璃工程公司 用于加热玻璃板的方法和设备
EP2141132B1 (fr) * 2008-07-02 2012-12-05 Astero Four
CN102344242A (zh) * 2011-07-21 2012-02-08 杭州精工机械有限公司 数控对流混合辐射加热方式的加热炉及加热方法
CN107572764A (zh) * 2017-09-07 2018-01-12 洛阳兰迪玻璃机器股份有限公司 一种玻璃板对流式加热方法

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