WO2019242216A1 - 一种光纤冷却装置及对光纤进行冷却的方法 - Google Patents

一种光纤冷却装置及对光纤进行冷却的方法 Download PDF

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WO2019242216A1
WO2019242216A1 PCT/CN2018/115584 CN2018115584W WO2019242216A1 WO 2019242216 A1 WO2019242216 A1 WO 2019242216A1 CN 2018115584 W CN2018115584 W CN 2018115584W WO 2019242216 A1 WO2019242216 A1 WO 2019242216A1
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optical fiber
cooling
dry ice
pipe
cooling pipe
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PCT/CN2018/115584
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English (en)
French (fr)
Inventor
纪明辉
徐阳
李梦林
张子豪
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江苏永鼎股份有限公司
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Publication of WO2019242216A1 publication Critical patent/WO2019242216A1/zh

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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
    • C03B37/10—Non-chemical treatment

Definitions

  • the present application relates to an optical fiber cooling device and a method for cooling optical fibers, and belongs to the technical field of optical fiber cooling.
  • helium gas is generally used as a medium before coating the coating, and the glass optical fiber is cooled to below 100 degrees Celsius in a cooling pipe passing cooling water (or other refrigerant).
  • Helium is a scarce resource and its price is relatively high.
  • This method uses a pulverizer to make dry ice (solid carbon dioxide) into tiny particles. It is driven by compressed air to cool the optical fiber in the cooling tube. Low-temperature dry ice can take away a large amount of heat and control dry ice during the process of sublimation and carbon dioxide heating. The flow of particles can cool the fiber to the temperature required for the drawing process.
  • This cooling method does not use helium, and the cooling pipe does not need to pass cooling water (or other refrigerant).
  • the temperature when the optical fiber comes out of the drawing furnace and reaches the coating mold is as high as several hundreds of degrees, and the optical fiber cannot be effectively coated and protected. At the same time, the stress of the optical fiber during the cooling process cannot be released. Direct coating will seriously affect Fiber performance. In order to ensure that the optical fiber has a good coating effect and excellent performance, the optical fiber needs to be cooled.
  • Chinese patent CN107311446A discloses an optical fiber drawing cooling device, which uses saturated evaporated carbon dioxide and cooling pipes to pass cooling water to cool bare optical fibers.
  • the device is complex and the cooling effect is poor.
  • the technical problem to be solved in the present application is to provide an optical fiber cooling device and a method for cooling optical fibers in order to solve the above technical problems existing in the existing optical fiber cooling device and optical fiber cooling method.
  • An optical fiber cooling device includes a compressed air supply mechanism, a dry ice supply mechanism, a mixing tank, a pipe, and a cooling pipe; the compressed air supply mechanism and the dry ice supply mechanism are respectively connected to a mixing tank and are used to supply dry ice particles and air to the mixing tank
  • the mixing tank communicates with the cooling pipe through a pipe, the cooling pipe is a hollow structure for the optical fiber to pass through, the pipe is divided into an even number of branch pipes at the front end of the cooling pipe, and the branch pipes are opposite to the central axis of the cooling pipe, and the branch pipe and the The cooling pipes are connected through.
  • the branch pipe is connected at a position of 1 / 4-1 / 2 of the upper end of the cooling pipe.
  • the dry ice supply mechanism includes a dry ice storage tank and a powder machine, the dry ice storage tank and the powder machine are connected through a pipeline, the powder machine and the mixing tank are connected through a pipeline, and the A first throttle valve is installed on the pipeline. The first throttle valve is used to adjust the flow of dry ice particles.
  • the compressed air supply mechanism includes an air compressor and a high-pressure air storage tank, the air compressor and the high-pressure air storage tank are connected through a pipeline, the high-pressure air storage tank and the mixing tank are connected through a pipeline, and the high-pressure air storage tank is connected with A second throttle valve is installed on the pipeline between the mixing tanks, and the second throttle valve is used to regulate the flow of compressed air.
  • two end caps are provided on the upper and lower ends of the cooling pipe, and the end caps are provided with a plurality of fine air holes.
  • the present application also provides a method for cooling an optical fiber by using the above-mentioned optical fiber cooling device.
  • the optical fiber from the graphite furnace passes through a cooling tube of the cooling device, so that dry ice particles driven by air flow into the cooling tube to cool the optical fiber.
  • the flow rate of the dry ice particles is 1-100g / min, and the flow rate of the compressed air is 0.1-10L / min
  • the diameter of the dry ice particles is between 0.1 and 1 mm.
  • the inner diameter of the cooling pipe is 5-10 times the diameter of the optical fiber.
  • the dry ice particle flow rate is controlled to be 1-10g / min, and the compressed air flow rate is 0.1-3L / min.
  • the dry ice particle flow rate is controlled to be 10-100 g / min, and the compressed air flow rate is 1-10 L / min.
  • the even number of branch pipes of the optical fiber cooling device of the present application are opposite to the central axis of the cooling pipe, and the branch pipes are connected to the cooling pipe, so that dry ice can be sprayed onto the optical fiber in a relative manner, and the cooling effect is good and the cooling efficiency is high. , Increase the production speed of optical fiber, increase the output of optical fiber.
  • the optical fiber cooling device and method for cooling optical fibers of the present application cools the optical fibers by using dry ice particles driven by compressed air.
  • Low-temperature dry ice can take away a large amount of heat during the process of sublimation and carbon dioxide warming, and at the same time, the safety of dry ice High performance and easy supply.
  • the optical fiber cooling device and method for cooling optical fibers of the present application control the size of dry ice particles, the flow of dry ice particles, and the flow of compressed air to cool the optical fiber to the temperature required for the drawing process.
  • FIG. 1 is a schematic diagram of the overall structure of an optical fiber cooling device of the present application
  • the reference numerals in the figure are: 1-control system, 2-air compressor, 3-high-pressure air storage tank, 4-dry ice storage tank, 5-powder machine, 6-mixing tank, 7-flow meter, 8- Optical fiber, 9-pipe, 10-cooling pipe, a-first throttle valve, b-second throttle valve.
  • This embodiment provides an optical fiber cooling device, as shown in FIG. 1, including a compressed air supply mechanism, a dry ice supply mechanism, a mixing tank 6, a pipe 9, and a cooling pipe 10; the compressed air supply mechanism and the dry ice supply mechanism are respectively mixed with
  • the tank 6 is connected to supply dry ice particles and air to the mixing tank 6; the mixing tank 6 is communicated with a cooling pipe 10 through a pipe 9, which is a hollow structure for optical fibers to pass through, and the pipe 9 is in a cooling pipe
  • the front end of 10 is divided into an even number of branch pipes.
  • the branch pipes are opposite to the central axis of the cooling pipe 10.
  • the branch pipes are connected to the cooling pipe 10 in a continuous manner.
  • the two branch pipes are arranged symmetrically with respect to the central axis of the cooling pipe 10.
  • the branch pipe is connected at the position of 1 / 4-1 / 2 of the upper end of the cooling pipe 10.
  • the crushed dry ice is driven by the compressed air to meet the optical fiber in the cooling pipe.
  • the temperature rise can effectively achieve the cooling of the optical fiber.
  • the dry ice supply mechanism includes a dry ice storage tank 4 and a powder machine 5, the dry ice storage tank 4 and the powder machine 5 are connected through a pipeline, the powder machine 5 and the mixing tank 6 are connected through a pipe, and the powder machine 5 is mixed with the powder
  • a first throttle valve is installed on the pipeline between the tanks 6, and the first throttle valve is used to control the flow of dry ice particles.
  • the compressed air supply mechanism includes an air compressor 2 and a high-pressure air storage tank 3, the air compressor 2 is connected to the high-pressure air storage tank 3 through a pipeline, and the high-pressure air storage tank 3 and a mixing tank 6 are connected through a pipeline.
  • a second throttle valve is installed on the pipeline 9 between the storage tank 3 and the mixing tank 6, and the second throttle valve is used to control the flow of compressed air.
  • the optical fiber cooling device includes a control system 1, and the control system 1 is electrically connected to the first throttle valve and the second throttle valve.
  • the size of the crushed dry ice particles is controlled by the pulverizer 5, the first throttle valve is controlled by the control system 1 to adjust the flow of dry ice particles entering the mixing tank 6, and the second section is controlled by the control system 1.
  • a flow valve to regulate the air flow into the mixing tank 6 to cool the optical fiber to the required temperature.
  • the upper and lower ends of the cooling pipe 10 are provided with two end caps.
  • the end caps are provided with a plurality of small air holes. This design can ensure the stability of the air flow and is more conducive to the cooling of the optical fiber 9.
  • a flow meter 7 is installed on the pipe 9 connecting the pulverizer 5 and the cooling pipe 10 to monitor whether the flow rate in the pipe 9 is normal.
  • the dry ice in the dry ice storage tank 4 is passed through the powder mill 5 and ground into fine particles.
  • the compressor 2 compresses the air into the high-pressure air storage tank 3, and the control system 5 controls the first throttle according to the feedback of the drawing speed.
  • the valve 11 and the second throttle valve 12 adjust the flow of dry ice and compressed air into the mixing irrigation 6, respectively.
  • the granular solid CO 2 entering the mixing tank 6 is driven by the compressed air and enters the cooling pipe 10 through the pipe 9
  • Medium and low-temperature granular solid CO 2 absorbs heat during sublimation into gaseous CO 2 and the temperature rise of gaseous CO 2 , so that the optical fiber 9 passing through the cooling pipe 9 is cooled, and the gaseous CO 2 and compressed air pass through the cooling pipe 10
  • the air vents are discharged into the atmosphere.
  • This embodiment provides a method for cooling an optical fiber by using the optical fiber cooling device of Embodiment 1. Specifically, the optical fiber 8 from the graphite furnace passes through the cooling tube 10 of the cooling device, so that the air-driven dry ice particles flow to the cooling tube 10 The fiber is cooled inside.
  • the flow and diameter of dry ice particles depend on the thickness and drawing speed of the inner coating layer of the optical fiber.
  • the air flow depends on the flow of dry ice particles and can fully drive the dry ice particles.
  • the flow of dry ice particles is 1-100g / min.
  • the air flow rate is 0.1-10L / min, and the diameter of the dry ice particles is between 0.1-1mm.
  • the running speed of the optical fiber in the cooling pipe 10 reaches 300-800m / min
  • the dry ice particle flow rate is controlled to 1-10g / min
  • the compressed air flow rate is 0.1-3L / min.
  • the dry ice particle flow rate is controlled to 10-100g / min, and the compressed air flow rate is 1-10L / min.
  • the inner diameter of the cooling pipe 10 is 5-10 times the diameter of the optical fiber 8, and this design can make the optical fiber achieve a good cooling effect.

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  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
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Abstract

一种光纤冷却装置和冷却方法，冷却装置包括压缩空气供给机构、干冰供给机构、混合罐(6)、管道(9)和冷却管(10)；压缩空气供给机构、干冰供给机构分别与混合罐(6)连接，混合罐(6)通过管道(9)与冷却管(10)相连通，冷却管(10)为供光纤穿过的中空结构，管道(9)在冷却管(10)前端分成偶数根支管，支管与冷却管(10)贯通连接；冷却方法为使空气带动干冰颗粒流到冷却管内对光纤进行冷却。

Description

一种光纤冷却装置及对光纤进行冷却的方法 技术领域
本申请涉及一种光纤冷却装置及对光纤进行冷却的方法，属于光纤冷却技术领域。
背景技术
在石英光纤生产中，在涂覆涂料之前，一般使用氦气作为介质，在通冷却水(或其它冷媒)的冷却管中将玻璃光纤冷却到100摄氏度以下。氦气是一种稀缺资源，价格比较高。本方法使用粉碎机将干冰(固态二氧化碳)制成微小颗粒，在压缩空气的带动下通到冷却管中冷却光纤，低温干冰在升华和二氧化碳升温的过程中，能带走大量的热量，控制干冰颗粒的流量可以将光纤冷却到拉丝工艺需要的温度。本冷却方法不使用氦气，冷却管不需要通冷却水(或者其它冷媒)。
在光纤生产中，光纤从拉丝炉中出来后到达涂覆模具时的温度还高达几百度，无法对光纤进行有效的涂覆保护，同时光纤在冷却过程中的应力无法释放直接涂覆会严重影响光纤的性能。为了确保光纤有一个良好的涂覆效果和优异的性能，需要对光纤进行冷却。
传统的光纤冷却通常会选择比热容为5.24KJ/kg.K的氦气进行冷却，氦气的比热容较空气大，热交换比较快，但氦气作为一种稀缺资源，价格越来越昂贵，使用氦气冷却光纤将会使光纤的生产成本越来越高。
氢气的比热容达到了14.43KJ/kg.K，几乎达到氦气的3倍，不仅 冷却效果非常理想，并且氢气的价格低廉，中国专利CN104496170A提出了一种使用氢气作为冷却气体的光纤拉丝冷却管装置和方法。但是，氢气作为一种易燃易爆气体，存在安全隐患，需要做冷却用氢气的回收工作，以远离氢气引发爆炸的体积范围。
中国专利CN107311446A公开了一种光纤拉丝冷却装置，利用饱和蒸发二氧化碳以及通冷却水的冷却管来对裸光纤进行冷却，装置复杂、冷却效果较差。
申请内容
本申请要解决的技术问题是：为解决现有光纤冷却装置及光纤冷却方法存在的上述技术问题，提供一种光纤冷却装置及对光纤进行冷却的方法。
本申请解决其技术问题所采用的技术方案是：
一种光纤冷却装置，包括压缩空气供给机构、干冰供给机构、混合罐、管道和冷却管；所述压缩空气供给机构、干冰供给机构分别与混合罐连接，用于向混合罐供给干冰颗粒和空气；所述混合罐通过管道与冷却管相连通，所述冷却管为供光纤穿过的中空结构，管道在冷却管前端分成偶数根支管，支管相对冷却管的中心轴线两两相对设置，支管与冷却管贯通连接。
优选地，支管连接在冷却管上端1/4-1/2的位置处。
优选地，干冰供给机构包括干冰储罐和粉粹机，所述干冰储罐和粉粹机通过管道相连，所述粉粹机与混合罐通过管道相连，在粉粹机与混合罐之间的管道上安装有第一节流阀，第一节流阀用于调节干冰 颗粒的流量。
优选地，压缩空气供给机构包括空气压缩机与高压空气储罐，所述空气压缩机与高压空气储罐通过管道相连，所述高压空气储罐与混合罐通过管道相连，在高压空气储罐与混合罐之间的管道上安装有第二节流阀，第二节流阀用于调节压缩空气的流量。
优选地，冷却管的上下两端设有两个端盖，所述端盖上设有多个细小的气孔。
本申请还提供一种采用上述的光纤冷却装置对光纤进行冷却的方法，将从石墨炉出来的光纤通过冷却装置的冷却管，使空气带动的干冰颗粒流到冷却管内对所述光纤进行冷却，所述干冰颗粒的流量为1-100g/min,压缩空气流量为0.1-10L/min
优选地，所述干冰颗粒的直径在0.1-1mm之间。
优选地，冷却管的内径为光纤直径的5-10倍。
优选地，当光纤在冷却管的运行速度达到300-800m/min时，控制干冰颗粒流量为1-10g/min，压缩空气流量为0.1-3L/min。
优选地，当光纤在冷却管的运行速度达到800m/min以上时，控制干冰颗粒流量为10-100g/min，压缩空气流量为1-10L/min。
本申请的有益效果是：
(1)本申请的光纤冷却装置的偶数根支管相对冷却管的中心轴线两两相对设置，支管与冷却管贯通连接，可以使干冰以相对的方式喷射到光纤上，冷却效果好，冷却效率高，提高了光纤生产速度，增加了光纤产量。
(2)本申请的光纤冷却装置及对光纤进行冷却的方法通过压缩空气带动的干冰颗粒对光纤进行冷却，低温干冰在升华和二氧化碳升温的过程中，能带走大量的热量，同时干冰的安全性高、易于供应。
(3)本申请的光纤冷却装置及对光纤进行冷却的方法通过控制干冰颗粒的大小、干冰颗粒的流量及压缩空气的流量，以将光纤冷却到拉丝工艺需要的温度。
附图说明
下面结合附图和实施例对本申请进一步说明。
图1是本申请光纤冷却装置的整体结构示意图；
图中的附图标记为：1-控制系统，2-空气压缩机，3-高压空气储罐，4-干冰储罐，5-粉粹机，6-混合罐，7-流量计，8-光纤，9-管道，10-冷却管，a-第一节流阀，b-第二节流阀。
具体实施方式
现在结合附图对本申请作进一步详细的说明。这些附图均为简化的示意图，仅以示意方式说明本申请的基本结构，因此其仅显示与本申请有关的构成。
实施例1
本实施例提供一种光纤冷却装置，如图1所示，包括压缩空气供给机构、干冰供给机构、混合罐6、管道9和冷却管10；所述压缩空气供给机构、干冰供给机构分别与混合罐6连接，用于向混合罐6供给干冰颗粒和空气；所述混合罐6通过管道9与冷却管10相连通， 所述冷却管10为供光纤穿过的中空结构，管道9在冷却管10前端分成偶数根支管，支管相对冷却管10的中心轴线两两相对设置，支管与冷却管10贯通连接，此设计可以使干冰以相对的方式喷射到光纤8上，更利于光纤8的冷却。
如图1所示，支管为两根，两根支管相对冷却管10的中心轴线对称设置。
支管连接在冷却管10上端1/4-1/2的位置处，粉碎的干冰在压缩空气的带动下遇到冷却管中的光纤，在光纤移动的过程中，随着低温干冰的升华和二氧化碳的升温，有效实现光纤的冷却。
干冰供给机构包括干冰储罐4和粉粹机5，所述干冰储罐4和粉粹机5通过管道相连，所述粉粹机5与混合罐6通过管道相连，在粉粹机5与混合罐6之间的管道上安装有第一节流阀，第一节流阀用于控制干冰颗粒的流量。
压缩空气供给机构包括空气压缩机2与高压空气储罐3，所述空气压缩机2与高压空气储罐3通过管道相连，所述高压空气储罐3与混合罐6通过管道相连，在高压空气储罐3与混合罐6之间的管道9上安装有第二节流阀，第二节流阀用于控制压缩空气的流量。
如图1所示，光纤冷却装置包括控制系统1，控制系统1与第一节流阀和第二节流阀电连接。
使用时，通过粉碎机5来控制被粉碎的干冰颗粒的粒径大小，通过控制系统1控制第一节流阀，以调节进入混合罐6的干冰颗粒的流量，通过控制系统1控制第二节流阀，以调节进入混合罐6的空气流 量，将光纤冷却到需要的温度。
冷却管10的上下两端设有两个端盖，所述端盖上设有多个细小的气孔，此设计可以保证气流的稳定，更利于光纤9的冷却。
在连接粉碎机5与冷却管10的管道9上安装有流量计7，用于监测管道9内的流量是否正常。
工作原理：
使用时，将干冰储藏罐4中的干冰经过粉粹机5，研磨成细小颗粒，压缩机2将空气压缩到高压空气储存罐3中，控制系统5根据拉丝速度的反馈，控制第一节流阀11和第二节流阀12来分别调整干冰和压缩空气进入混合灌6的流量，进入混合罐6的颗粒状的固态CO 2在压缩空气的带动下，经过管道9通入到冷却管10中，低温的颗粒状的固态CO 2在升华变成气态CO 2以及气态CO 2升温的过程中吸收热量，使经过冷却管9内部的光纤9得到冷却，气态CO 2和压缩空气通过冷却管10的出气孔排放到大气中。
实施例2
本实施例提供一种采用实施例1的光纤冷却装置对光纤进行冷却的方法，具体是将从石墨炉出来的光纤8通过冷却装置的冷却管10，使空气带动的干冰颗粒流到冷却管10内对所述光纤进行冷却。
干冰颗粒流量和直径大小取决于光纤内层涂覆层的厚度和拉丝速度，空气流量取决于干冰颗粒流量，能充分带动干冰颗粒即可，所述干冰颗粒的流量为1-100g/min,压缩空气流量为0.1-10L/min，所述干冰颗粒的直径在0.1-1mm之间。
当光纤在冷却管10的运行速度达到300-800m/min时，控制干冰颗粒流量为1-10g/min，压缩空气流量为0.1-3L/min。
当光纤在冷却管10的运行速度达到800m/min以上时，控制干冰颗粒流量为10-100g/min，压缩空气流量为1-10L/min。
优选地，冷却管10的内径为光纤8直径的5-10倍，此设计可以使光纤达到良好的冷却效果。
以上述依据本申请的理想实施例为启示，通过上述的说明内容，相关工作人员完全可以在不偏离本项申请技术思想的范围内，进行多样的变更以及修改。本项申请的技术性范围并不局限于说明书上的内容，必须要根据权利要求范围来确定其技术性范围。

Claims (10)

  1. 一种光纤冷却装置，其特征在于，包括压缩空气供给机构、干冰供给机构、混合罐(6)、管道(9)和冷却管(10)；所述压缩空气供给机构、干冰供给机构分别与混合罐(6)连接，用于向混合罐(6)供给干冰颗粒和空气；所述混合罐(6)通过管道(9)与冷却管(10)相连通，所述冷却管(10)为供光纤穿过的中空结构，管道(9)在冷却管(10)前端分成偶数根支管，支管相对冷却管(10)的中心轴线两两相对设置，支管与冷却管(10)贯通连接。
  2. 根据权利要求1所述的光纤冷却装置，其特征在于，支管连接在冷却管(10)上端1/4-1/2的位置处。
  3. 根据权利要求1或2所述的光纤冷却装置，其特征在于，干冰供给机构包括干冰储罐(4)和粉粹机(5)，所述干冰储罐(4)和粉粹机(5)通过管道相连，所述粉粹机(5)与混合罐(6)通过管道相连，在粉粹机(5)与混合罐(6)之间的管道上安装有第一节流阀，第一节流阀用于调节干冰颗粒的流量。
  4. 根据权利要求1-3任一项所述的光纤冷却装置，其特征在于，压缩空气供给机构包括空气压缩机(2)与高压空气储罐(3)，所述空气压缩机(2)与高压空气储罐(3)通过管道相连，所述高压空气储罐(3)与混合罐(6)通过管道相连，在高压空气储罐(3)与混合罐(6)之间的管道(9)上安装有第二节流阀，第二节流阀用于调节压缩空气的流量。
  5. 根据权利要求1-4任一项所述的光纤冷却装置，其特征在于，冷却管(10)的上下两端设有两个端盖，所述端盖 上设有多个细小的气孔。
  6. 一种采用权利要求1-5任一项所述的光纤冷却装置对光纤进行冷却的方法，其特征在于，将从石墨炉出来的光纤(8)通过冷却装置的冷却管(10)，使空气带动的干冰颗粒流到冷却管(10)内对所述光纤进行冷却，所述干冰颗粒的流量为1-100g/min,压缩空气流量为0.1-10L/min。
  7. 根据权利要求6所述的对光纤进行冷却的方法，其特征在于，所述干冰颗粒的直径在0.1-1mm之间。
  8. 根据权利要求6或7所述的对光纤进行冷却的方法，其特征在于，冷却管(10)的内径为光纤直径的5-10倍。
  9. 根据权利要求6-8任一项所述的对光纤进行冷却的方法，其特征在于，当光纤在冷却管(10)的运行速度达到300-800m/min时，控制干冰颗粒流量为1-10g/min，压缩空气流量为0.1-3L/min。
  10. 根据权利要求6-8任一项所述的对光纤进行冷却的方法，其特征在于，当光纤在冷却管(10)的运行速度达到800m/min以上时，控制干冰颗粒流量为10-100g/min，压缩空气流量为1-10L/min。
PCT/CN2018/115584 2018-06-20 2018-11-15 一种光纤冷却装置及对光纤进行冷却的方法 WO2019242216A1 (zh)

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