WO2016192340A1 - Process using pid software to trigger function for reducing he flow in drawing furnace - Google Patents

Process using pid software to trigger function for reducing he flow in drawing furnace Download PDF

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Publication number
WO2016192340A1
WO2016192340A1 PCT/CN2015/095972 CN2015095972W WO2016192340A1 WO 2016192340 A1 WO2016192340 A1 WO 2016192340A1 CN 2015095972 W CN2015095972 W CN 2015095972W WO 2016192340 A1 WO2016192340 A1 WO 2016192340A1
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Prior art keywords
flow
furnace
software
reducing
pid
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PCT/CN2015/095972
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French (fr)
Chinese (zh)
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李爽
孙建彬
巴拉吉
维捷
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江苏斯德雷特通光光纤有限公司
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Publication of WO2016192340A1 publication Critical patent/WO2016192340A1/en

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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C03B37/0253—Controlling or regulating
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C03B37/029—Furnaces therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

Definitions

  • the invention relates to a fiber manufacturing process, in particular to a process of triggering a PID software to save He flow in a drawing furnace.
  • the drawing speed is from 1500-1800m/min to the current drawing speed of 2200-2300m/min.
  • the size of the preform is also increased from 120-150mm to the current 180-200mm.
  • domestic manufacturers have entered the large-size preform drawing, which will greatly improve the company's production capacity and equipment utilization.
  • high requirements are also put on the drawing process of large-size preforms. Due to the performance of He itself, the addition of He in the large-sized preform drawing furnace will greatly improve the out-of-roundness and strength of the fiber cladding. However, He is more expensive, and how to save He flow becomes the key to cost control.
  • the invention provides a PID software triggering function to save the He flow in the drawing furnace.
  • the PID software trigger function realizes a process for saving He flow in the drawing furnace, and is characterized in that it comprises the following steps:
  • Step 1 When the temperature rises, the power is from zero, and the software gives a trigger signal to make the He flow in the furnace reach 12L/min;
  • Step 2 When the speed increases to 1500m/min, the software control system gives a trigger signal and starts to reduce the He flow rate to 0.05L/min. It takes 80min to reach the He flow to 8L/min to ensure the pressure difference inside the furnace. Constant, when the He flow is reduced, the Ar flow is increased at the same frequency;
  • Step 3 normal operation, using 8L/min wire drawing
  • Step 4 When the whole rod is finished, the furnace is turned off, and the PID control system gives a control signal. The He flow is reduced to 0 L/min. To ensure that the outside air enters the furnace, the He gas flow rate is increased by decreasing the He flow rate.
  • the invention has the advantages of reducing the use of He flow and reducing the production cost of the optical fiber.
  • the trigger software has two usage modes, namely manual and automatic, and if an abnormal situation occurs, the manual state can be used to ensure the normal production of the production line.
  • Figure 1 is a diagram showing the relationship between the drawing length of the present invention and the out-of-roundness of the optical fiber cladding
  • FIG. 2 is a process control topology diagram of the present invention.
  • the PID software trigger function realizes the process of saving He flow in the drawing furnace, including the following steps:
  • Step 1 When the temperature rises, the power is from zero, and the software gives a trigger signal to make the He flow in the furnace reach 12L/min;
  • Step 2 When the speed increases to 1500m/min, the software control system gives a trigger signal and starts to reduce the He flow rate to 0.05L/min. It takes 80min to He flow. Reduced to 8L / min, in order to ensure a constant pressure difference in the furnace, reduce the He flow, increase the Ar flow at the same frequency;
  • Step 3 normal operation, using 8L/min wire drawing
  • Step 4 When the whole rod is finished, the furnace is turned off, and the PID control system gives a control signal. The He flow is reduced to 0 L/min. To ensure that the outside air enters the furnace, the He gas flow rate is increased by decreasing the He flow rate.
  • the bare fiber fluctuates greatly, it should be slowly increased until the bare fiber fluctuates less, and the speed is increased to the trigger speed (1500 m/min).
  • the furnace temperature can be increased, the tension of the fiber can be reduced, and the pre-formed rod can be uniformly melted in the drawing furnace, thereby achieving the purpose of reducing the fluctuation of the bare fiber diameter, because the bare fiber fluctuates. Larger ones will cause the fiber cladding to be out of roundness.
  • the invention reduces the use of He flow and reduces the production cost of the optical fiber.
  • the trigger software has two usage modes, namely manual and automatic, and if an abnormal situation occurs, the manual state can be used to ensure the normal production of the production line.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

A process using a PID software to trigger functions for reducing a He flow in a drawing furnace comprises the following steps: 1. upon heating with a power from zero, sending, by software, a trigger signal, such that a He flow in a furnace reaches 12 L/min; 2. during a speed increase with a drawing speed reaching 1500 m/min, sending, by a software control system, a trigger signal to begin reducing the He flow with a decrement of 0.05 L/min, wherein 80 minutes are required to reduce the He flow to 8 L/min, and adding an Ar flow with the same speed while reducing the He flow, so as to guarantee a constant pressure difference in the furnace; 3. drawing with the helium flow as 8 L/min during normal operation; and 4. upon finishing an entire bar, turning off the furnace, sending, by a PID control system, a control signal to reduce the He flow to 0 L/min, and increasing the Ar gas flow in the same amount while reducing the He flow to prevent external air from entering the furnace. The present application reduces the usage amount of a He flow and a manufacturing cost of optical fibers.

Description

PID软件触发功能实现节省拉丝炉内He流量的工艺PID software trigger function to save the He flow in the drawing furnace 技术领域Technical field
本发明涉及光纤制造工艺，特别涉及一种PID软件触发功能实现节省拉丝炉内He流量的工艺。The invention relates to a fiber manufacturing process, in particular to a process of triggering a PID software to save He flow in a drawing furnace.
背景技术Background technique
近几年由于国内光纤产能的不断提升，其拉丝工艺也有了较大的提高，拉丝速度从1500-1800m/min，提至到目前的2200-2300m/min的拉丝速度。预制棒的尺寸也从120-150mm提至目前的180-200mm.目前国内厂商纷纷进军大尺寸预制棒拉丝，因其会大大提高公司产能以及设备利用率。同时对大尺寸预制棒拉丝工艺也提出了较高的要求，由于He本身的性能原因，大尺寸预制棒拉丝炉内须加入He，会使光纤包层不圆度和强度有较大幅度改善，但He价格较为昂贵，如何节省He流量成为成本控制的关键。In recent years, due to the continuous improvement of domestic optical fiber production capacity, the drawing process has also been greatly improved. The drawing speed is from 1500-1800m/min to the current drawing speed of 2200-2300m/min. The size of the preform is also increased from 120-150mm to the current 180-200mm. At present, domestic manufacturers have entered the large-size preform drawing, which will greatly improve the company's production capacity and equipment utilization. At the same time, high requirements are also put on the drawing process of large-size preforms. Due to the performance of He itself, the addition of He in the large-sized preform drawing furnace will greatly improve the out-of-roundness and strength of the fiber cladding. However, He is more expensive, and how to save He flow becomes the key to cost control.
发明内容Summary of the invention
本发明提供一种PID软件触发功能实现节省拉丝炉内He流量的工艺。The invention provides a PID software triggering function to save the He flow in the drawing furnace.
本发明采用的技术方案是：The technical solution adopted by the invention is:
PID软件触发功能实现节省拉丝炉内He流量的工艺，其特征在于：包括以下步骤：The PID software trigger function realizes a process for saving He flow in the drawing furnace, and is characterized in that it comprises the following steps:
步骤1、升温时功率从零，软件给出触发信号，使炉内He流量达到12L/min； Step 1. When the temperature rises, the power is from zero, and the software gives a trigger signal to make the He flow in the furnace reach 12L/min;
步骤2、当升速时速度达到1500m/min，软件控制系统给出触发信号，开始减少He流量，为0.05L/min，需用时80min直至He流量降至8L/min,为保证炉内压差恒定，减少He流量时，同频率增加Ar流量；Step 2. When the speed increases to 1500m/min, the software control system gives a trigger signal and starts to reduce the He flow rate to 0.05L/min. It takes 80min to reach the He flow to 8L/min to ensure the pressure difference inside the furnace. Constant, when the He flow is reduced, the Ar flow is increased at the same frequency;
步骤3、正常运行，使用8L/min拉丝；Step 3, normal operation, using 8L/min wire drawing;
步骤4、当整根棒结束后，关闭炉子，PID控制系统给出控制信号，He流量减少为0L/min，为保证外界空气进入炉内，降低He流量时增加同数值的Ar气体流量。Step 4. When the whole rod is finished, the furnace is turned off, and the PID control system gives a control signal. The He flow is reduced to 0 L/min. To ensure that the outside air enters the furnace, the He gas flow rate is increased by decreasing the He flow rate.
本发明的优点是：降低He流量的使用，降低了光纤的生产成本,触发软件有两种使用模式，即手动和自动,若出现异常状况可使用手动状态，确保产线的正常生产。The invention has the advantages of reducing the use of He flow and reducing the production cost of the optical fiber. The trigger software has two usage modes, namely manual and automatic, and if an abnormal situation occurs, the manual state can be used to ensure the normal production of the production line.
附图说明DRAWINGS
下面结合附图和具体实施方式对本发明作进一步详细描述。The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
图1为本发明拉丝长度与光纤包层不圆度之间的关系图；Figure 1 is a diagram showing the relationship between the drawing length of the present invention and the out-of-roundness of the optical fiber cladding;
图2为本发明的工艺控制拓扑图。2 is a process control topology diagram of the present invention.
具体实施方式detailed description
PID软件触发功能实现节省拉丝炉内He流量的工艺，包括以下步骤：The PID software trigger function realizes the process of saving He flow in the drawing furnace, including the following steps:
步骤1、升温时功率从零，软件给出触发信号，使炉内He流量达到12L/min；Step 1. When the temperature rises, the power is from zero, and the software gives a trigger signal to make the He flow in the furnace reach 12L/min;
步骤2、当升速时速度达到1500m/min，软件控制系统给出触发信号，开始减少He流量，为0.05L/min，需用时80min直至He流量 降至8L/min,为保证炉内压差恒定，减少He流量时，同频率增加Ar流量；Step 2. When the speed increases to 1500m/min, the software control system gives a trigger signal and starts to reduce the He flow rate to 0.05L/min. It takes 80min to He flow. Reduced to 8L / min, in order to ensure a constant pressure difference in the furnace, reduce the He flow, increase the Ar flow at the same frequency;
步骤3、正常运行，使用8L/min拉丝；Step 3, normal operation, using 8L/min wire drawing;
步骤4、当整根棒结束后，关闭炉子，PID控制系统给出控制信号，He流量减少为0L/min，为保证外界空气进入炉内，降低He流量时增加同数值的Ar气体流量。Step 4. When the whole rod is finished, the furnace is turned off, and the PID control system gives a control signal. The He flow is reduced to 0 L/min. To ensure that the outside air enters the furnace, the He gas flow rate is increased by decreasing the He flow rate.
光纤生产过程中，若裸光纤波动较大，应缓慢升速，直至裸光纤波动较小时，升速至触发速度(1500m/min)。In the optical fiber production process, if the bare fiber fluctuates greatly, it should be slowly increased until the bare fiber fluctuates less, and the speed is increased to the trigger speed (1500 m/min).
在光纤生产过程中，若裸光纤波动较大，可采取升高炉温，降低光纤张力，确保预制棒在拉丝炉内熔融状态较为均匀，进而达到裸光纤直径波动变小的目的，因为裸光纤波动较大会使光纤包层不圆度不合格。In the production process of optical fiber, if the bare fiber fluctuates greatly, the furnace temperature can be increased, the tension of the fiber can be reduced, and the pre-formed rod can be uniformly melted in the drawing furnace, thereby achieving the purpose of reducing the fluctuation of the bare fiber diameter, because the bare fiber fluctuates. Larger ones will cause the fiber cladding to be out of roundness.
大尺寸预制棒拉丝中，由图1可知，前450kms包层不圆度较大，若降速、升功率等控制手法无效，在前450kms可以使用手动控制。In the large-size preform drawing, it can be seen from Fig. 1 that the first 450 kms of the cladding is not rounded. If the control methods such as speed reduction and power increase are invalid, manual control can be used in the first 450 kms.
本发明降低He流量的使用，降低了光纤的生产成本,触发软件有两种使用模式，即手动和自动,若出现异常状况可使用手动状态，确保产线的正常生产。 The invention reduces the use of He flow and reduces the production cost of the optical fiber. The trigger software has two usage modes, namely manual and automatic, and if an abnormal situation occurs, the manual state can be used to ensure the normal production of the production line.

Claims (1)

  1. PID软件触发功能实现节省拉丝炉内He流量的工艺，其特征在于：包括以下步骤：The PID software trigger function realizes a process for saving He flow in the drawing furnace, and is characterized in that it comprises the following steps:
    步骤1、升温时功率从零，软件给出触发信号，使炉内He流量达到12L/min；Step 1. When the temperature rises, the power is from zero, and the software gives a trigger signal to make the He flow in the furnace reach 12L/min;
    步骤2、当升速时速度达到1500m/min，软件控制系统给出触发信号，开始减少He流量，为0.05L/min，需用时80min直至He流量降至8L/min,为保证炉内压差恒定，减少He流量时，同频率增加Ar流量；Step 2. When the speed increases to 1500m/min, the software control system gives a trigger signal and starts to reduce the He flow rate to 0.05L/min. It takes 80min to reach the He flow to 8L/min to ensure the pressure difference inside the furnace. Constant, when the He flow is reduced, the Ar flow is increased at the same frequency;
    步骤3、正常运行，使用8L/min拉丝；Step 3, normal operation, using 8L/min wire drawing;
    步骤4、当整根棒结束后，关闭炉子，PID控制系统给出控制信号，He流量减少为0L/min，为保证外界空气进入炉内，降低He流量时增加同数值的Ar气体流量。 Step 4. When the whole rod is finished, the furnace is turned off, and the PID control system gives a control signal. The He flow is reduced to 0 L/min. To ensure that the outside air enters the furnace, the He gas flow rate is increased by decreasing the He flow rate.
PCT/CN2015/095972 2015-06-05 2015-11-30 Process using pid software to trigger function for reducing he flow in drawing furnace WO2016192340A1 (en)

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CN104944763A (en) * 2015-06-05 2015-09-30 江苏斯德雷特通光光纤有限公司 Technology for reducing He flow in wire drawing furnace by PID software trigger function

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104211295A (en) * 2014-08-29 2014-12-17 江苏通鼎光电股份有限公司 Optical fiber drawing device and drawing method thereof
CN104628250A (en) * 2013-11-13 2015-05-20 住友电气工业株式会社 Fiber manufacturing method and fiber drawing furnace
CN104944763A (en) * 2015-06-05 2015-09-30 江苏斯德雷特通光光纤有限公司 Technology for reducing He flow in wire drawing furnace by PID software trigger function

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JP2003321243A (en) * 2002-04-30 2003-11-11 Fujikura Ltd METHOD FOR REUSING He IN OPTICAL FIBER SPINNING PROCESS

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104628250A (en) * 2013-11-13 2015-05-20 住友电气工业株式会社 Fiber manufacturing method and fiber drawing furnace
CN104211295A (en) * 2014-08-29 2014-12-17 江苏通鼎光电股份有限公司 Optical fiber drawing device and drawing method thereof
CN104944763A (en) * 2015-06-05 2015-09-30 江苏斯德雷特通光光纤有限公司 Technology for reducing He flow in wire drawing furnace by PID software trigger function

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