WO2018040574A1 - Apparatus for sealing furnace mouth of drawing furnace and control method therefor - Google Patents

Apparatus for sealing furnace mouth of drawing furnace and control method therefor Download PDF

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Publication number
WO2018040574A1
WO2018040574A1 PCT/CN2017/080635 CN2017080635W WO2018040574A1 WO 2018040574 A1 WO2018040574 A1 WO 2018040574A1 CN 2017080635 W CN2017080635 W CN 2017080635W WO 2018040574 A1 WO2018040574 A1 WO 2018040574A1
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WO
WIPO (PCT)
Prior art keywords
optical fiber
fiber preform
sealing ring
drawing furnace
diameter
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PCT/CN2017/080635
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French (fr)
Chinese (zh)
Inventor
江金金
曹珊珊
刘志忠
张帆
朱刘盅
贾泽峰
周树奎
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中天科技光纤有限公司
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Publication of WO2018040574A1 publication Critical patent/WO2018040574A1/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
    • 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
    • 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

Definitions

  • the invention relates to the field of fiber drawing, in particular to a wire drawing furnace mouth sealing device and a control method thereof.
  • the wire drawing furnace is one of the most important equipment in the fiber manufacturing process.
  • the wire drawing furnace can draw the optical fiber preform into an optical fiber.
  • the drawing furnace raises the temperature inside the furnace to 2000 degrees Celsius by means of a heating element.
  • the current heating element is mainly graphite, and graphite is easily oxidized at a high temperature, which may cause the strength of the fiber drawn by the optical fiber preform to be deteriorated.
  • a certain amount of shielding gas such as argon, nitrogen or helium gas is introduced into the drawing furnace during the drawing process, and the inside of the drawing furnace is set to a positive pressure to prevent outside air from entering the drawing furnace. .
  • the specifications of the optical fiber preform are increasing, and sometimes the outer diameter of the single optical fiber preform is also changed, so that between the furnace mouth of the drawing furnace and the optical fiber preform The gap is easily unsealed, and the outside air easily enters the drawing furnace through the gap between the furnace mouth and the optical fiber preform.
  • the technical problem to be solved by the present invention is to provide a wire drawing furnace mouth sealing device capable of sealing a gap between a furnace mouth of a drawing furnace and the optical fiber preform and a control method thereof.
  • a wire drawing furnace mouth sealing device for sealing a gap between a furnace mouth of a drawing furnace and an optical fiber preform, wherein one end of the drawing furnace is formed with a furnace mouth, and the wire drawing furnace mouth sealing device is located at Outside the wire drawing furnace, the wire furnace mouth sealing device comprises:
  • a retractable sealing ring disposed on an end surface of the end and disposed coaxially with the furnace mouth of the drawing furnace;
  • An air inflating device for pumping or inflating the retractable sealing ring to change the air pressure in the retractable sealing ring and correspondingly changing the inner diameter of the retractable sealing ring;
  • a laser caliper for measuring an actual diameter of the optical fiber preform
  • a pneumatic sensor that is sealed into the interior of the retractable sealing ring for measuring the air pressure in the retractable sealing ring
  • a controller electrically connected to the air inflator, the laser caliper, and the air pressure sensor, according to the measured air pressure in the retractable sealing ring and the actual diameter of the measured optical fiber preform Diameter data of the optical fiber preform to control the air inflator to pump or inflate the retractable sealing ring such that the inner annular surface of the retractable sealing ring always abuts against the optical fiber preform .
  • the retractable sealing ring is made of a high temperature resistant elastic material
  • an annular air chamber is formed inside the retractable sealing ring
  • the wire furnace mouth sealing device further comprises a gas pipe, the retractable sealing
  • An annular outer seal connects the air tube, the air tube is in communication with the air chamber and is in communication with the air inflator.
  • the wire furnace mouth seal device further includes a connecting member, and the retractable sealing ring is disposed on an end surface of the end of the wire drawing furnace through the connecting member.
  • the retractable sealing ring extends radially outwardly with a ring plate with a mounting hole
  • the connecting member is an annular connecting plate having a diameter greater than or equal to the furnace mouth of the drawing furnace
  • the connecting member The first end is formed with a connecting hole corresponding to the mounting hole of the ear plate, and the second end of the connecting member is a flange connected to the end of the drawing furnace, and the wire furnace sealing device is further
  • a fastener is included, the fastener passing through the mounting hole and the connecting hole.
  • the pumping and inflating device is a pumping and inflating dual-purpose pump.
  • the controller prestores a database of the relationship between the air pressure inside the retractable sealing ring and the theoretical diameter of the optical fiber preform, and the controller according to the measured air pressure in the retractable sealing ring and the pre-stored database Determining the theoretical diameter of the optical fiber preform, and controlling the pumping and inflating device to pump, inflate or not act according to the measured actual diameter of the optical fiber preform and the determined theoretical diameter of the optical fiber preform .
  • a drawing furnace mouth sealing control method is applied to a drawing furnace mouth sealing device, the drawing furnace mouth sealing device comprises a retractable sealing ring, a laser caliper, an air pressure sensor , an air inflator and a controller, the method comprising:
  • the controller obtains the measured actual diameter d of the optical fiber preform from the laser caliper;
  • the controller acquires the measured air pressure p inside the retractable sealing ring from the air pressure sensor;
  • the controller determines a theoretical diameter of the optical fiber preform according to the measured air pressure p inside the retractable sealing ring and a theoretical database of the relationship between the air pressure inside the pre-existing retractable sealing ring and the theoretical diameter of the optical fiber preform D;
  • the controller determines whether the measured actual diameter d of the optical fiber preform is equal to the determined theoretical diameter D of the optical fiber preform;
  • the controller controls the pneumatic inflator not to pump and inflate;
  • the controller controls the suction airing device to pump air;
  • the controller controls the pneumatic inflator to inflate.
  • the furnace mouth of the drawing furnace also has a certain temperature, and the high temperature resistant elastic material is used as the material of the retractable sealing ring, so that the retractable sealing ring not only has Scalability and high temperature resistance.
  • the connecting member fixedly connects the retractable sealing ring with the end of the drawing furnace, and functions to fix the retractable sealing ring.
  • the controller prestores a database of the relationship between the air pressure inside the retractable sealing ring and the theoretical diameter of the optical fiber preform, which is convenient for automatic control.
  • FIG. 1 is a schematic view of a wire drawing furnace mouth sealing device and an optical fiber preform according to the present invention.
  • FIG. 2 is a perspective view of the retractable sealing ring, the connecting member and the fastener of the wire furnace mouth sealing device shown in FIG. 1.
  • FIG. 3 is a flow chart of a method for controlling the sealing of the furnace mouth of the drawing furnace according to the present invention.
  • spatially relative terms such as “above” and “below” are used herein to describe the relationship of one element or feature to the other element(s) or features(s) shown in the drawings.
  • Spatially relative terms such as “upper end” and “downward” are used herein to describe the relationship of some features of one element to other features of the elements in the figures.
  • the device may be oriented differently (rotated 90 degrees or in other directions) and the spatially relative descriptors used herein should be interpreted accordingly.
  • the present invention discloses a wire drawing furnace mouth seal apparatus 100.
  • the wire furnace mouth seal 100 is used to seal the gap between the furnace opening 201 of the wire drawing furnace 200 and the optical fiber preform 300.
  • the wire drawing furnace 200 includes an end 202 on which the furnace opening 201 is formed. In the present embodiment, the end 202 is the upper end of the wire drawing furnace 200.
  • the optical fiber preform 300 is suspended and supported, inserted into the drawing furnace 200 through the furnace opening 201, and moved downward as the drawing of the drawing furnace 200 proceeds.
  • the wire furnace mouth seal device 100 is located above the wire drawing furnace 200.
  • the wire drawing furnace mouth sealing device 100 is located outside the drawing furnace 200.
  • the wire drawing furnace mouth sealing device 100 comprises a retractable sealing ring 1, a connecting member 2, a fastener 3, an air inflating device 4, a gas pipe 5, a pressure sensor 6, and a laser caliper 7 And controller 8.
  • the retractable sealing ring 1 is disposed on an end surface of the end 202 of the drawing furnace 200 and disposed coaxially with the furnace opening 201 of the drawing furnace 200.
  • the retractable sealing ring 1 is made of a high temperature resistant elastic material.
  • An annular air chamber 11 is formed inside the retractable sealing ring 1.
  • the retractable sealing ring 1 is externally sealed and connected to the air pipe 5.
  • the air tube 5 communicates with the air chamber 11.
  • the retractable sealing ring 1 extends radially outward to form an annular ear plate 13 with mounting holes 12. In this embodiment, the ring bottom of the retractable sealing ring 1 extends radially outward to form the ear plate 13.
  • the retractable sealing ring 1 is provided on the end surface of the end 202 of the drawing furnace 200 through the connecting member 2.
  • the connecting member 2 is used for fixing the telescopic ring 2 to prevent the telescopic ring 2 from moving relative to the furnace opening 201.
  • the connecting member 2 is disposed between the retractable sealing ring 1 and the end 202 of the drawing furnace 200.
  • the retractable sealing ring 1 is located above the connecting member 2, and the end 202 of the drawing furnace 200 is located below the connecting member 2.
  • the connecting member 2 is an annular connecting plate having a diameter greater than or equal to the furnace opening 201 of the drawing furnace 200.
  • the connector 2 includes a first end 21 and a second end 22 opposite the first end 21.
  • the first end 21 is the top of the connecting member 2, and the second end 22 is the bottom of the connecting member 2.
  • the first end 21 of the connecting member 2 is formed with a connecting hole 23 corresponding to the mounting hole 12 of the ear plate 13, so that the fastener 3 can pass through the mounting hole 12 and the connecting hole 23
  • the retractable sealing ring 1 is fixed to the connecting member 2.
  • the second end 22 of the connector 2 is a flange that is fixedly coupled to the end 202 of the wire drawing furnace 200.
  • the air inflator 4 is a pumping and inflating dual purpose pump.
  • the pumping inflator 4 can be used to perform single pumping, single pumping or simultaneous pumping.
  • the air inflator 4 communicates with the retractable sealing ring 1 through the air pipe 5, and the air chamber 11 of the retractable sealing ring 1 is single-exhausted, single-blowed or At the same time, the air is pumped to change the air pressure inside the retractable sealing ring 1, thereby correspondingly changing the inner diameter of the retractable sealing ring 1.
  • the air pressure sensor 6 is sealingly inserted inside the retractable sealing ring 1. Specifically, the measuring end of the air pressure sensor 6 is sealed into the air chamber 11 of the retractable sealing ring 1. The air pressure sensor 6 is used to measure the air pressure inside the retractable sealing ring 1.
  • the laser caliper 7 is fixedly supported by a suspension device (not shown).
  • the laser caliper 7 is used to measure the actual diameter of the optical fiber preform 300.
  • the laser caliper 7 is disposed above the retractable sealing ring 1.
  • the controller 8 is electrically connected to the air suction device 4, the air pressure sensor 6, and the laser caliper 7.
  • the controller 8 prestores a database of the relationship between the air pressure inside the retractable sealing ring 1 and the theoretical diameter of the optical fiber preform 300.
  • the controller 8 controls the diameter data of the optical fiber preform 300 according to the measured air pressure inside the retractable sealing ring 1 , the measured actual diameter of the optical fiber preform 300, and the pre-stored database.
  • the air inflator 4 draws or inflates the retractable sealing ring 1 to change the inner diameter of the retractable sealing ring 1 so that the inner ring surface of the retractable sealing ring 1 always abuts against The optical fiber preform 300.
  • the inner diameter of the retractable sealing ring 1 also changes accordingly, so that the inner diameter of the retractable sealing ring 1 and the optical fiber preform 300
  • the actual diameters are equal such that the retractable sealing ring 1 seals the gap between the furnace opening 201 and the optical fiber preform 300.
  • the inner diameter of the retractable sealing ring 1 varies according to the actual diameter of the tail shank 301 of the optical fiber preform 300, thereby enabling The gap between the furnace opening 201 and the optical fiber preform 300 is sealed in time.
  • FIG. 3 it is a flow chart of the method for controlling the mouth seal of the drawing furnace of the present invention.
  • the wire drawing furnace mouth sealing control method is applied to the wire drawing furnace mouth sealing device shown in FIG.
  • the drawing furnace mouth sealing control method comprises the steps of:
  • S301 The controller acquires the measured actual diameter d of the optical fiber preform from the laser caliper.
  • S302 The controller acquires the measured air pressure p inside the retractable sealing ring from the air pressure sensor.
  • the controller determines a theoretical diameter D of the optical fiber preform according to the measured air pressure p inside the retractable sealing ring and the database.
  • step S304 The controller compares the measured actual diameter d of the measured optical fiber preform with the determined theoretical diameter D of the optical fiber preform to determine whether the measured actual diameter d of the optical fiber preform is equal to the determined optical fiber.
  • the theoretical diameter D of the preform If the measured actual diameter d of the optical fiber preform is equal to the theoretical diameter D of the determined optical fiber preform, step S305 is performed. If the actual diameter d of the measured optical fiber preform is not equal to the theoretical diameter D of the determined optical fiber preform, step S306 is performed.
  • S305 The controller controls the air inflator to not operate, that is, controls the air inflator not to pump and not inflate, and performs step S301.
  • step S306 The controller determines whether the measured actual diameter d of the optical fiber preform is greater than the determined theoretical diameter D of the optical fiber preform. If the measured actual diameter d of the optical fiber preform is greater than the determined theoretical diameter D of the optical fiber preform, step S307 is performed.
  • S307 The controller controls the air inflator to pump air, and performs step S302.
  • step S308 The controller determines whether an actual diameter d of the measured optical fiber preform is less than a theoretical diameter D of the determined optical fiber preform. If the actual diameter d of the measured optical fiber preform is less than the theoretical diameter D of the determined optical fiber preform, step S309 is performed.
  • S309 The controller controls the inflation and inflation device to inflate, and performs step S302.
  • the flowchart of the method for controlling the mouth of the wire drawing furnace is not limited to the above steps, and there may be other modifications, such as the sequence of the step S305 and the step S306 and the step S307 and the step S308.
  • the step S305 and the step S306 are performed simultaneously with the step S307 and the step S308.
  • the present invention controls the pumping and inflating device to pump air to Having the measured actual diameter d of the optical fiber preform equal to the determined theoretical diameter D of the optical fiber preform, and when the actual diameter d of the optical fiber preform is less than the inside of the retractable sealing ring according to the measurement Controlling the pneumatic inflator to be inflated when the theoretical diameter D of the optical fiber preform is determined by the air pressure p such that the actual diameter d of the measured optical fiber preform is equal to the theoretical diameter D of the determined optical fiber preform, thereby
  • the inner annulus of the retractable sealing ring always abuts against the optical fiber preform to seal the gap between the furnace opening and the optical fiber preform.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
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Abstract

An apparatus for sealing a furnace mouth of a drawing furnace and a sealing control method. The apparatus comprises: an extendable and retractable sealing ring which is provided coaxially with the furnace mouth of the drawing furnace; an air extracting/inflating device which extracts air from or inflates air to the extendable and retractable sealing ring to change the pressure in the extendable and retractable sealing ring and correspondingly change the inner diameter of the extendable and retractable sealing ring; a laser diameter measuring instrument for measuring the actual diameter of an optical fiber preform; a pressure sensor for measuring the pressure in the extendable and retractable sealing ring; and a controller which analyzes, according to the measured pressure in the extendable and retractable sealing ring and the measured actual diameter of the optical fiber preform, diameter data of the optical fiber preform to control the air extracting/inflating device to extract air from or inflate air to the extendable and retractable sealing ring, so that the inner ring surface of the extendable and retractable sealing ring always abuts against the optical fiber preform. The control method can seal a gap between the furnace mouth of the drawing furnace and the optical fiber preform.

Description

拉丝炉炉口密封装置及其控制方法Wire drawing furnace mouth sealing device and control method thereof 技术领域Technical field
本发明涉及光纤拉丝领域，特别涉及一种拉丝炉炉口密封装置及其控制方法。The invention relates to the field of fiber drawing, in particular to a wire drawing furnace mouth sealing device and a control method thereof.
背景技术Background technique
拉丝炉是光纤制造工序中最重要的设备之一。拉丝炉能将光纤预制棒拉丝成光纤。在将光纤预制棒拉丝时，拉丝炉通过加热元件将炉内温度升高至2000摄氏度。目前的加热元件主要是石墨，而石墨在高温下容易氧化，从而会造成光纤预制棒拉丝成的光纤的强度变差。为了防止加热元件的氧化，在拉丝过程中会向拉丝炉中通入一定量的氩气、氮气或氦气等保护气体并将拉丝炉炉内设为正压，来防止外部空气进入拉丝炉内。但是随着光纤预制棒制造工艺的发展，光纤预制棒尺寸的规格越来越多，有时单根光纤预制棒的外径也会发生变化，如此拉丝炉炉口与所述光纤预制棒之间的间隙容易未被密封，则外部空气容易通过拉丝炉炉口与所述光纤预制棒之间的间隙进入拉丝炉内。The wire drawing furnace is one of the most important equipment in the fiber manufacturing process. The wire drawing furnace can draw the optical fiber preform into an optical fiber. When the optical fiber preform is drawn, the drawing furnace raises the temperature inside the furnace to 2000 degrees Celsius by means of a heating element. The current heating element is mainly graphite, and graphite is easily oxidized at a high temperature, which may cause the strength of the fiber drawn by the optical fiber preform to be deteriorated. In order to prevent oxidation of the heating element, a certain amount of shielding gas such as argon, nitrogen or helium gas is introduced into the drawing furnace during the drawing process, and the inside of the drawing furnace is set to a positive pressure to prevent outside air from entering the drawing furnace. . However, with the development of the optical fiber preform manufacturing process, the specifications of the optical fiber preform are increasing, and sometimes the outer diameter of the single optical fiber preform is also changed, so that between the furnace mouth of the drawing furnace and the optical fiber preform The gap is easily unsealed, and the outside air easily enters the drawing furnace through the gap between the furnace mouth and the optical fiber preform.
发明内容Summary of the invention
本发明要解决的技术问题是提供能密封拉丝炉炉口与所述光纤预制棒之间的间隙的拉丝炉炉口密封装置及其控制方法。The technical problem to be solved by the present invention is to provide a wire drawing furnace mouth sealing device capable of sealing a gap between a furnace mouth of a drawing furnace and the optical fiber preform and a control method thereof.
一种拉丝炉炉口密封装置，其用于将拉丝炉的炉口和光纤预制棒之间的间隙密封，所述拉丝炉的一端形成有炉口，所述拉丝炉炉口密封装置位于所述拉丝炉外，所述拉丝炉炉口密封装置包括：A wire drawing furnace mouth sealing device for sealing a gap between a furnace mouth of a drawing furnace and an optical fiber preform, wherein one end of the drawing furnace is formed with a furnace mouth, and the wire drawing furnace mouth sealing device is located at Outside the wire drawing furnace, the wire furnace mouth sealing device comprises:
设于所述端的端面上并与所述拉丝炉的炉口同轴设置的可伸缩密封圆环；a retractable sealing ring disposed on an end surface of the end and disposed coaxially with the furnace mouth of the drawing furnace;
抽气充气装置，对所述可伸缩密封圆环抽气或充气来改变所述可伸缩密封圆环内的气压并相应改变可伸缩密封圆环的内径；An air inflating device for pumping or inflating the retractable sealing ring to change the air pressure in the retractable sealing ring and correspondingly changing the inner diameter of the retractable sealing ring;
激光测径仪，用于测量所述光纤预制棒的实际直径；a laser caliper for measuring an actual diameter of the optical fiber preform;
气压传感器，密封插入可伸缩密封圆环内部，用于测量可伸缩密封圆环内的气压；a pneumatic sensor that is sealed into the interior of the retractable sealing ring for measuring the air pressure in the retractable sealing ring;
控制器，与所述抽气充气装置、所述激光测径仪及所述气压传感器电连接，根据所述测量的可伸缩密封圆环内的气压及所述测量的光纤预制棒的实际直径分析所述光纤预制棒的直径数据，来控制所述抽气充气装置对所述可伸缩密封圆环抽气或充气，以使所述可伸缩密封圆环内环面始终抵靠所述光纤预制棒。a controller electrically connected to the air inflator, the laser caliper, and the air pressure sensor, according to the measured air pressure in the retractable sealing ring and the actual diameter of the measured optical fiber preform Diameter data of the optical fiber preform to control the air inflator to pump or inflate the retractable sealing ring such that the inner annular surface of the retractable sealing ring always abuts against the optical fiber preform .
进一步地，所述可伸缩密封圆环由耐高温弹性材料制成，所述可伸缩密封圆环内部形成有环状气腔，所述拉丝炉炉口密封装置还包括气管，所述可伸缩密封圆环外部密封连接所述气管，所述气管与所述气腔相通，并与所述抽气充气装置连通。Further, the retractable sealing ring is made of a high temperature resistant elastic material, an annular air chamber is formed inside the retractable sealing ring, and the wire furnace mouth sealing device further comprises a gas pipe, the retractable sealing An annular outer seal connects the air tube, the air tube is in communication with the air chamber and is in communication with the air inflator.
进一步地，所述拉丝炉炉口密封装置还包括连接件，所述可伸缩密封圆环通过所述连接件设于所述拉丝炉的端的端面上。Further, the wire furnace mouth seal device further includes a connecting member, and the retractable sealing ring is disposed on an end surface of the end of the wire drawing furnace through the connecting member.
进一步地，所述可伸缩密封圆环径向向外延伸一圈带有安装孔的耳板，所述连接件为直径大于或等于所述拉丝炉炉口的环状连接板，所述连接件第一端形成有与所述耳板的安装孔对应的连接孔，所述连接件的第二端为与所述拉丝炉的所述端连接的法兰，所述拉丝炉炉口密封装置还包括紧固件，所述紧固件穿过所述安装孔及连接孔。Further, the retractable sealing ring extends radially outwardly with a ring plate with a mounting hole, and the connecting member is an annular connecting plate having a diameter greater than or equal to the furnace mouth of the drawing furnace, the connecting member The first end is formed with a connecting hole corresponding to the mounting hole of the ear plate, and the second end of the connecting member is a flange connected to the end of the drawing furnace, and the wire furnace sealing device is further A fastener is included, the fastener passing through the mounting hole and the connecting hole.
进一步地，所述抽气充气装置为抽气充气两用泵。Further, the pumping and inflating device is a pumping and inflating dual-purpose pump.
进一步地，所述控制器预存可伸缩密封圆环内部的气压与所述光纤预制棒理论直径关系数据库，所述控制器根据所述测量的可伸缩密封圆环内的气压及所述预存的数据库来确定所述光纤预制棒理论直径，并根据所述测量的光纤预制棒的实际直径及所述确定的所述光纤预制棒理论直径大小来控制所述抽气充气装置抽气、充气或不动作。Further, the controller prestores a database of the relationship between the air pressure inside the retractable sealing ring and the theoretical diameter of the optical fiber preform, and the controller according to the measured air pressure in the retractable sealing ring and the pre-stored database Determining the theoretical diameter of the optical fiber preform, and controlling the pumping and inflating device to pump, inflate or not act according to the measured actual diameter of the optical fiber preform and the determined theoretical diameter of the optical fiber preform .
一种拉丝炉炉口密封控制方法，所述拉丝炉炉口密封控制方法应用于拉丝炉炉口密封装置，所述拉丝炉炉口密封装置包括可伸缩密封圆环、激光测径仪、气压传感器、抽气充气装置及控制器，所述方法包括：A drawing furnace mouth sealing control method, the drawing furnace mouth sealing control method is applied to a drawing furnace mouth sealing device, the drawing furnace mouth sealing device comprises a retractable sealing ring, a laser caliper, an air pressure sensor , an air inflator and a controller, the method comprising:
所述控制器从所述激光测径仪获取测量的光纤预制棒的实际直径d；The controller obtains the measured actual diameter d of the optical fiber preform from the laser caliper;
所述控制器从所述气压传感器获取测量的可伸缩密封圆环内部的气压p；The controller acquires the measured air pressure p inside the retractable sealing ring from the air pressure sensor;
所述控制器根据所述测量的可伸缩密封圆环内部的气压p及预存的可伸缩密封圆环内部的气压与所述光纤预制棒的理论直径关系数据库来确定所述光纤预制棒的理论直径D；The controller determines a theoretical diameter of the optical fiber preform according to the measured air pressure p inside the retractable sealing ring and a theoretical database of the relationship between the air pressure inside the pre-existing retractable sealing ring and the theoretical diameter of the optical fiber preform D;
所述控制器判断所述测量的光纤预制棒的实际直径d是否等于所述确定的光纤预制棒的理论直径D；The controller determines whether the measured actual diameter d of the optical fiber preform is equal to the determined theoretical diameter D of the optical fiber preform;
如果所述测量的光纤预制棒的实际直径d等于所述确定的光纤预制棒的理论直径D，所述控制器控制所述抽气充气装置不抽气及充气；If the measured actual diameter d of the optical fiber preform is equal to the determined theoretical diameter D of the optical fiber preform, the controller controls the pneumatic inflator not to pump and inflate;
如果所述测量的光纤预制棒的实际直径d大于所述确定的光纤预制棒的理论直径D，所述控制器控制所述抽气充气装置抽气；If the measured actual diameter d of the optical fiber preform is greater than the determined theoretical diameter D of the optical fiber preform, the controller controls the suction airing device to pump air;
如果所述测量的光纤预制棒的实际直径d小于所述确定的光纤预制棒的理论直径D，所述控制器控制所述抽气充气装置充气。If the measured actual diameter d of the optical fiber preform is less than the determined theoretical diameter D of the optical fiber preform, the controller controls the pneumatic inflator to inflate.
本发明的优点在于：The advantages of the invention are:
（1）根据光纤预制棒直径的变化适时的调整可伸缩密封圆环的内径大小，保证整个拉丝过程中对拉丝炉炉口密封效果，从而实现对不规则光纤预制棒高速稳定拉丝，由于是自动控制，可防止因调整不及时造成的保护气体的浪费。(1) According to the change of the diameter of the optical fiber preform, adjust the inner diameter of the retractable sealing ring to ensure the sealing effect on the furnace mouth of the drawing furnace during the whole drawing process, thereby realizing high-speed stable drawing of the irregular optical fiber preform, because it is automatic Control can prevent the waste of protective gas caused by untimely adjustment.
（2）由于拉丝炉炉内温度较高，所述拉丝炉的炉口也具有一定的温度，采用耐高温的弹性材料作为可伸缩密封圆环的材料，使得所述可伸缩密封圆环不但具有可伸缩性且具有耐高温性。(2) Due to the high temperature in the furnace of the drawing furnace, the furnace mouth of the drawing furnace also has a certain temperature, and the high temperature resistant elastic material is used as the material of the retractable sealing ring, so that the retractable sealing ring not only has Scalability and high temperature resistance.
（3）所述连接件将所述可伸缩密封圆环与所述拉丝炉的端固定连接，起到固定限位所述可伸缩密封圆环的作用。(3) The connecting member fixedly connects the retractable sealing ring with the end of the drawing furnace, and functions to fix the retractable sealing ring.
所述控制器预存可伸缩密封圆环内部的气压与所述光纤预制棒的理论直径关系数据库，便于自动控制。The controller prestores a database of the relationship between the air pressure inside the retractable sealing ring and the theoretical diameter of the optical fiber preform, which is convenient for automatic control.
附图说明DRAWINGS
为了更清楚地说明本发明实施例技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are some embodiments of the present invention. For the ordinary technicians, other drawings can be obtained based on these drawings without any creative work.
图1为本发明一种拉丝炉炉口密封装置及光纤预制棒的示意图。1 is a schematic view of a wire drawing furnace mouth sealing device and an optical fiber preform according to the present invention.
图2为图1所示的拉丝炉炉口密封装置的可伸缩密封圆环、连接件及紧固件的立体示意图。2 is a perspective view of the retractable sealing ring, the connecting member and the fastener of the wire furnace mouth sealing device shown in FIG. 1.
图3为本发明一种拉丝炉炉口密封控制方法流程图。3 is a flow chart of a method for controlling the sealing of the furnace mouth of the drawing furnace according to the present invention.
具体实施方式detailed description
下面的实施例可以使本专业的技术人员更全面地理解本发明，但并不因此将本发明限制在所述的实施例范围之中。The following examples are intended to provide a fuller understanding of the invention, and are not intended to limit the invention.
为了描述的简单性，诸如“上方”及“下方”等空间相对术语此处可用于描述一个元件或特征与附图中示出的其他（多个）元件或（多个）特征的关系。而“上端”及“向下”等空间相对术语此处可用于描述一个元件的部分特征相对于附图中的所述元件的其他特征的关系。装置可以不同取向（旋转90度或在其他方向）且此处使用的空间相对描述符应相应地解释。For the sake of simplicity of the description, spatially relative terms such as "above" and "below" are used herein to describe the relationship of one element or feature to the other element(s) or features(s) shown in the drawings. Spatially relative terms such as "upper end" and "downward" are used herein to describe the relationship of some features of one element to other features of the elements in the figures. The device may be oriented differently (rotated 90 degrees or in other directions) and the spatially relative descriptors used herein should be interpreted accordingly.
如图1所示，本发明公开了一种拉丝炉炉口密封装置100。所述拉丝炉炉口密封装置100用于将拉丝炉200的炉口201和光纤预制棒300之间的间隙密封。所述拉丝炉200包括一端202，所述端202上形成有所述炉口201。在本实施例中，所述端202为所述拉丝炉200的上端。所述光纤预制棒300被悬挂支撑，通过所述炉口201插入所述拉丝炉200内，并随着所述拉丝炉200拉丝的进行而向下移动。As shown in Figure 1, the present invention discloses a wire drawing furnace mouth seal apparatus 100. The wire furnace mouth seal 100 is used to seal the gap between the furnace opening 201 of the wire drawing furnace 200 and the optical fiber preform 300. The wire drawing furnace 200 includes an end 202 on which the furnace opening 201 is formed. In the present embodiment, the end 202 is the upper end of the wire drawing furnace 200. The optical fiber preform 300 is suspended and supported, inserted into the drawing furnace 200 through the furnace opening 201, and moved downward as the drawing of the drawing furnace 200 proceeds.
在本实施例中，所述拉丝炉炉口密封装置100位于所述拉丝炉200上方。所述拉丝炉炉口密封装置100位于所述拉丝炉200外。请同时参考图2，所述拉丝炉炉口密封装置100包括可伸缩密封圆环1、连接件2、紧固件3、抽气充气装置4、气管5、气压传感器6、激光测径仪7及控制器8。In the present embodiment, the wire furnace mouth seal device 100 is located above the wire drawing furnace 200. The wire drawing furnace mouth sealing device 100 is located outside the drawing furnace 200. Referring to FIG. 2 at the same time, the wire drawing furnace mouth sealing device 100 comprises a retractable sealing ring 1, a connecting member 2, a fastener 3, an air inflating device 4, a gas pipe 5, a pressure sensor 6, and a laser caliper 7 And controller 8.
所述可伸缩密封圆环1设于所述拉丝炉200的端202的端面上，并与所述拉丝炉200的炉口201同轴设置。所述可伸缩密封圆环1由耐高温弹性材料制成。所述可伸缩密封圆环1内部形成有环状气腔11。所述可伸缩密封圆环1外部密封连接所述气管5。所述气管5与所述气腔11相通。所述可伸缩密封圆环1径向向外延伸形成一圈带有安装孔12的耳板13。在本实施例中，所述可伸缩密封圆环1环底径向向外延伸形成所述耳板13。The retractable sealing ring 1 is disposed on an end surface of the end 202 of the drawing furnace 200 and disposed coaxially with the furnace opening 201 of the drawing furnace 200. The retractable sealing ring 1 is made of a high temperature resistant elastic material. An annular air chamber 11 is formed inside the retractable sealing ring 1. The retractable sealing ring 1 is externally sealed and connected to the air pipe 5. The air tube 5 communicates with the air chamber 11. The retractable sealing ring 1 extends radially outward to form an annular ear plate 13 with mounting holes 12. In this embodiment, the ring bottom of the retractable sealing ring 1 extends radially outward to form the ear plate 13.
具体地，所述可伸缩密封圆环1通过所述连接件2设于所述拉丝炉200的端202的端面上。所述连接件2用于固定所述可伸缩圆环2，防止所述可伸缩圆环2相对于所述炉口201移动。在本实施例中，所述连接件2设置于所述可伸缩密封圆环1及所述拉丝炉200的端202之间。其中，所述可伸缩密封圆环1位于所述连接件2的上方，而所述拉丝炉200的端202位于所述连接件2的下方。所述连接件2为直径大于或等于所述拉丝炉200的炉口201的环状连接板。所述连接件2包括第一端21及与所述第一端21相对的第二端22。在本实施例中，所述第一端21为所述连接件2的顶部，所述第二端22为所述连接件2的底部。所述连接件2的第一端21形成有与所述耳板13的安装孔12对应的连接孔23，从而所述紧固件3可穿过所述安装孔12及所述连接孔23来将所述可伸缩密封圆环1固定在所述连接件2上。所述连接件2的第二端22为与所述拉丝炉200的端202固定连接的法兰。Specifically, the retractable sealing ring 1 is provided on the end surface of the end 202 of the drawing furnace 200 through the connecting member 2. The connecting member 2 is used for fixing the telescopic ring 2 to prevent the telescopic ring 2 from moving relative to the furnace opening 201. In the present embodiment, the connecting member 2 is disposed between the retractable sealing ring 1 and the end 202 of the drawing furnace 200. Wherein, the retractable sealing ring 1 is located above the connecting member 2, and the end 202 of the drawing furnace 200 is located below the connecting member 2. The connecting member 2 is an annular connecting plate having a diameter greater than or equal to the furnace opening 201 of the drawing furnace 200. The connector 2 includes a first end 21 and a second end 22 opposite the first end 21. In the present embodiment, the first end 21 is the top of the connecting member 2, and the second end 22 is the bottom of the connecting member 2. The first end 21 of the connecting member 2 is formed with a connecting hole 23 corresponding to the mounting hole 12 of the ear plate 13, so that the fastener 3 can pass through the mounting hole 12 and the connecting hole 23 The retractable sealing ring 1 is fixed to the connecting member 2. The second end 22 of the connector 2 is a flange that is fixedly coupled to the end 202 of the wire drawing furnace 200.
所述抽气充气装置4为抽气充气两用泵。所述抽气充气装置4可用于进行单抽气、单打气或同时抽气打气。所述抽气充气装置4通过所述气管5与所述可伸缩密封圆环1连通，并通过所述气管5对所述可伸缩密封圆环1的气腔11进行单抽气、单打气或同时抽气打气，来改变所述可伸缩密封圆环1内部的气压，从而相应地改变所述可伸缩密封圆环1的内径。The air inflator 4 is a pumping and inflating dual purpose pump. The pumping inflator 4 can be used to perform single pumping, single pumping or simultaneous pumping. The air inflator 4 communicates with the retractable sealing ring 1 through the air pipe 5, and the air chamber 11 of the retractable sealing ring 1 is single-exhausted, single-blowed or At the same time, the air is pumped to change the air pressure inside the retractable sealing ring 1, thereby correspondingly changing the inner diameter of the retractable sealing ring 1.
所述气压传感器6密封插入所述可伸缩密封圆环1内部。具体地，所述气压传感器6的测量端密封插入所述可伸缩密封圆环1的气腔11内。所述气压传感器6用于测量所述可伸缩密封圆环1内部的气压。The air pressure sensor 6 is sealingly inserted inside the retractable sealing ring 1. Specifically, the measuring end of the air pressure sensor 6 is sealed into the air chamber 11 of the retractable sealing ring 1. The air pressure sensor 6 is used to measure the air pressure inside the retractable sealing ring 1.
所述激光测径仪7通过悬挂装置（图未示）固定支撑。所述激光测径仪7用于测量所述光纤预制棒300的实际直径。在本实施例中，所述激光测径仪7设置于所述可伸缩密封圆环1的上方。The laser caliper 7 is fixedly supported by a suspension device (not shown). The laser caliper 7 is used to measure the actual diameter of the optical fiber preform 300. In the embodiment, the laser caliper 7 is disposed above the retractable sealing ring 1.
所述控制器8与所述抽气充气装置4、气压传感器6及激光测径仪7电连接。所述控制器8预存可伸缩密封圆环1内部的气压与所述光纤预制棒300的理论直径关系数据库。所述控制器8根据所述测量的可伸缩密封圆环1内部的气压、所述测量的光纤预制棒300的实际直径及所述预存的数据库分析所述光纤预制棒300的直径数据，来控制所述抽气充气装置4对所述可伸缩密封圆环1抽气或充气，从而改变所述可伸缩密封圆环1的内径，使得所述可伸缩密封圆环1内环面始终抵靠于所述光纤预制棒300。The controller 8 is electrically connected to the air suction device 4, the air pressure sensor 6, and the laser caliper 7. The controller 8 prestores a database of the relationship between the air pressure inside the retractable sealing ring 1 and the theoretical diameter of the optical fiber preform 300. The controller 8 controls the diameter data of the optical fiber preform 300 according to the measured air pressure inside the retractable sealing ring 1 , the measured actual diameter of the optical fiber preform 300, and the pre-stored database. The air inflator 4 draws or inflates the retractable sealing ring 1 to change the inner diameter of the retractable sealing ring 1 so that the inner ring surface of the retractable sealing ring 1 always abuts against The optical fiber preform 300.
从而当所述光纤预制棒300的实际直径d发生变化时，所述可伸缩密封圆环1的内径大小也相应发生变化，使得所述可伸缩密封圆环1的内径与所述光纤预制棒300实际直径相等，从而所述可伸缩密封圆环1密封所述炉口201与所述光纤预制棒300之间的间隙。尤其是当光纤预制棒300的尾柄301在进入所述拉丝炉200时，所述可伸缩密封圆环1的内径会根据所述光纤预制棒300的尾柄301的实际直径进行变化，从而能够及时的密封所述炉口201与所述光纤预制棒300之间的间隙。Therefore, when the actual diameter d of the optical fiber preform 300 changes, the inner diameter of the retractable sealing ring 1 also changes accordingly, so that the inner diameter of the retractable sealing ring 1 and the optical fiber preform 300 The actual diameters are equal such that the retractable sealing ring 1 seals the gap between the furnace opening 201 and the optical fiber preform 300. In particular, when the tail shank 301 of the optical fiber preform 300 enters the drawing furnace 200, the inner diameter of the retractable sealing ring 1 varies according to the actual diameter of the tail shank 301 of the optical fiber preform 300, thereby enabling The gap between the furnace opening 201 and the optical fiber preform 300 is sealed in time.
如图3所示，为本发明的拉丝炉炉口密封控制方法的流程图。所述拉丝炉炉口密封控制方法应用于图1所示的拉丝炉炉口密封装置。所述拉丝炉炉口密封控制方法包括步骤：As shown in FIG. 3, it is a flow chart of the method for controlling the mouth seal of the drawing furnace of the present invention. The wire drawing furnace mouth sealing control method is applied to the wire drawing furnace mouth sealing device shown in FIG. The drawing furnace mouth sealing control method comprises the steps of:
S301：所述控制器从所述激光测径仪获取测量的光纤预制棒的实际直径d。S301: The controller acquires the measured actual diameter d of the optical fiber preform from the laser caliper.
S302：所述控制器从所述气压传感器获取测量的可伸缩密封圆环内部的气压p。S302: The controller acquires the measured air pressure p inside the retractable sealing ring from the air pressure sensor.
S303：所述控制器根据所述测量的可伸缩密封圆环内部的气压p及所述数据库确定所述光纤预制棒的理论直径D。S303: The controller determines a theoretical diameter D of the optical fiber preform according to the measured air pressure p inside the retractable sealing ring and the database.
S304：所述控制器比较所述测量的光纤预制棒的实际直径d与所述确定的光纤预制棒的理论直径D来判断所述测量的光纤预制棒的实际直径d是否等于所述确定的光纤预制棒的理论直径D。如果所述测量的光纤预制棒的实际直径d等于所述确定的光纤预制棒的理论直径D，执行步骤S305。如果所述测量的光纤预制棒的实际直径d不等于所述确定的光纤预制棒的理论直径D，执行步骤S306。S304: The controller compares the measured actual diameter d of the measured optical fiber preform with the determined theoretical diameter D of the optical fiber preform to determine whether the measured actual diameter d of the optical fiber preform is equal to the determined optical fiber. The theoretical diameter D of the preform. If the measured actual diameter d of the optical fiber preform is equal to the theoretical diameter D of the determined optical fiber preform, step S305 is performed. If the actual diameter d of the measured optical fiber preform is not equal to the theoretical diameter D of the determined optical fiber preform, step S306 is performed.
S305：所述控制器控制所述抽气充气装置不动作，即控制所述抽气充气装置不抽气及不充气，并执行步骤S301。S305: The controller controls the air inflator to not operate, that is, controls the air inflator not to pump and not inflate, and performs step S301.
S306：所述控制器确定所述测量的光纤预制棒的实际直径d是否大于所述确定的光纤预制棒的理论直径D。如果所述测量的光纤预制棒的实际直径d大于所述确定的光纤预制棒的理论直径D，执行步骤S307。S306: The controller determines whether the measured actual diameter d of the optical fiber preform is greater than the determined theoretical diameter D of the optical fiber preform. If the measured actual diameter d of the optical fiber preform is greater than the determined theoretical diameter D of the optical fiber preform, step S307 is performed.
S307：所述控制器控制所述抽气充气装置抽气，并执行步骤S302。S307: The controller controls the air inflator to pump air, and performs step S302.
S308：所述控制器确定所述测量的光纤预制棒的实际直径d是否小于所述确定的光纤预制棒的理论直径D。如果所述测量的光纤预制棒的实际直径d小于所述确定的光纤预制棒的理论直径D时，执行步骤S309。S308: The controller determines whether an actual diameter d of the measured optical fiber preform is less than a theoretical diameter D of the determined optical fiber preform. If the actual diameter d of the measured optical fiber preform is less than the theoretical diameter D of the determined optical fiber preform, step S309 is performed.
S309：所述控制器控制所述抽气充气装置充气，并执行步骤S302。S309: The controller controls the inflation and inflation device to inflate, and performs step S302.
显然，所述拉丝炉炉口密封控制方法的流程图不仅局限于上述的步骤，还可有其他变形，如所述步骤S305及所述步骤S306与所述步骤S307及所述步骤S308的顺序对换或者所述步骤S305及所述步骤S306与所述步骤S307及所述步骤S308同时执行。Obviously, the flowchart of the method for controlling the mouth of the wire drawing furnace is not limited to the above steps, and there may be other modifications, such as the sequence of the step S305 and the step S306 and the step S307 and the step S308. The step S305 and the step S306 are performed simultaneously with the step S307 and the step S308.
从而本发明当所述光纤预制棒的实际直径d大于根据所述测量的可伸缩密封圆环内部的气压p确定的光纤预制棒的理论直径D时，控制所述抽气充气装置抽气，以使得所述测量的光纤预制棒的实际直径d与所述确定的光纤预制棒的理论直径D相等，并当所述光纤预制棒的实际直径d小于根据所述测量的可伸缩密封圆环内部的气压p确定的光纤预制棒的理论直径D时，控制所述抽气充气装置充气，以使得所述测量的光纤预制棒的实际直径d与所述确定的光纤预制棒的理论直径D相等，从而所述可伸缩密封圆环的内环面始终抵靠于所述光纤预制棒来密封所述炉口与所述光纤预制棒之间的间隙。Therefore, when the actual diameter d of the optical fiber preform is greater than the theoretical diameter D of the optical fiber preform determined according to the measured air pressure p inside the retractable sealing ring, the present invention controls the pumping and inflating device to pump air to Having the measured actual diameter d of the optical fiber preform equal to the determined theoretical diameter D of the optical fiber preform, and when the actual diameter d of the optical fiber preform is less than the inside of the retractable sealing ring according to the measurement Controlling the pneumatic inflator to be inflated when the theoretical diameter D of the optical fiber preform is determined by the air pressure p such that the actual diameter d of the measured optical fiber preform is equal to the theoretical diameter D of the determined optical fiber preform, thereby The inner annulus of the retractable sealing ring always abuts against the optical fiber preform to seal the gap between the furnace opening and the optical fiber preform.
以上显示和描述了本发明的基本原理和主要特征。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。The basic principles and main features of the present invention have been shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, and that the present invention is only described in the foregoing description and the description of the present invention, without departing from the spirit and scope of the invention. Various changes and modifications are intended to be included within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and their equivalents.

Claims (7)

  1. 一种拉丝炉炉口密封装置，其用于将拉丝炉的炉口和光纤预制棒之间的间隙密封，所述拉丝炉的一端形成有炉口，其特征在于，所述拉丝炉炉口密封装置位于所述拉丝炉外，所述拉丝炉炉口密封装置包括： A wire drawing furnace mouth sealing device for sealing a gap between a furnace mouth of a drawing furnace and an optical fiber preform, wherein one end of the drawing furnace is formed with a furnace mouth, characterized in that the drawing furnace mouth is sealed The device is located outside the drawing furnace, and the furnace furnace mouth sealing device comprises:
    设于所述端的端面上并与所述拉丝炉的炉口同轴设置的可伸缩密封圆环；a retractable sealing ring disposed on an end surface of the end and disposed coaxially with the furnace mouth of the drawing furnace;
    抽气充气装置，对所述可伸缩密封圆环抽气或充气来改变所述可伸缩密封圆环内的气压并相应改变可伸缩密封圆环的内径；An air inflating device for pumping or inflating the retractable sealing ring to change the air pressure in the retractable sealing ring and correspondingly changing the inner diameter of the retractable sealing ring;
    激光测径仪，用于测量所述光纤预制棒的实际直径；a laser caliper for measuring an actual diameter of the optical fiber preform;
    气压传感器，用于测量可伸缩密封圆环内的气压；a pressure sensor for measuring the air pressure in the retractable sealing ring;
    控制器，与所述抽气充气装置、所述激光测径仪及所述气压传感器电连接，根据所述测量的可伸缩密封圆环内的气压及所述测量的光纤预制棒的实际直径分析所述光纤预制棒的直径数据，来控制所述抽气充气装置对所述可伸缩密封圆环抽气或充气，以使所述可伸缩密封圆环内环面始终抵靠所述光纤预制棒。a controller electrically connected to the air inflator, the laser caliper, and the air pressure sensor, according to the measured air pressure in the retractable sealing ring and the actual diameter of the measured optical fiber preform Diameter data of the optical fiber preform to control the air inflator to pump or inflate the retractable sealing ring such that the inner annular surface of the retractable sealing ring always abuts against the optical fiber preform .
  2. 根据权利要求1所述的一种拉丝炉炉口密封装置，其特征在于：所述可伸缩密封圆环由耐高温弹性材料制成，所述可伸缩密封圆环内部形成有环状气腔，所述拉丝炉炉口密封装置还包括气管，所述可伸缩密封圆环外部密封连接所述气管，所述气管与所述气腔相通，并与所述抽气充气装置连通。 The wire drawing furnace mouth sealing device according to claim 1, wherein the retractable sealing ring is made of a high temperature resistant elastic material, and an annular air chamber is formed inside the retractable sealing ring. The wire furnace mouth seal device further includes a gas pipe, and the retractable sealing ring is externally sealed and connected to the gas pipe, and the gas pipe is in communication with the gas chamber and is in communication with the air suction and inflation device.
  3. 根据权利要求1所述的一种拉丝炉口密封装置，其特征在于：所述拉丝炉炉口密封装置还包括连接件，所述可伸缩密封圆环通过所述连接件设于所述拉丝炉的端的端面上。 A wire drawing furnace mouth sealing device according to claim 1, wherein said wire drawing furnace mouth sealing device further comprises a connecting member, said retractable sealing ring being disposed in said drawing furnace through said connecting member On the end of the end.
  4. 根据权利要求3所述的一种拉丝炉炉口密封装置，其特征在于：所述可伸缩密封圆环径向向外延伸一圈带有安装孔的耳板，所述连接件为直径大于或等于所述拉丝炉炉口的环状连接板，所述连接件第一端形成有与所述耳板的安装孔对应的连接孔，所述连接件的第二端为与所述拉丝炉的所述端连接的法兰，所述拉丝炉炉口密封装置还包括紧固件，所述紧固件穿过所述安装孔及连接孔。 A wire drawing furnace mouth sealing device according to claim 3, wherein said retractable sealing ring extends radially outwardly one turn of an ear plate with a mounting hole, said connecting member having a diameter greater than or An annular connecting plate equal to the mouth of the drawing furnace, the first end of the connecting member is formed with a connecting hole corresponding to the mounting hole of the ear plate, and the second end of the connecting member is opposite to the drawing furnace The end-connected flange, the wire furnace mouth seal further includes a fastener, the fastener passing through the mounting hole and the connecting hole.
  5. 根据权利要求1所述的一种拉丝炉炉口密封装置，其特征在于：所述抽气充气装置为抽气充气两用泵。 A wire drawing furnace mouth sealing device according to claim 1, wherein said pumping and inflating device is a pumping and inflating dual-purpose pump.
  6. 根据权利要求1所述的一种拉丝炉炉口密封装置，其特征在于：所述控制器预存可伸缩密封圆环内部的气压与所述光纤预制棒理论直径关系数据库，所述控制器根据所述测量的可伸缩密封圆环内的气压及所述预存的数据库来确定所述光纤预制棒理论直径，并根据所述测量的光纤预制棒的实际直径及所述确定的所述光纤预制棒理论直径大小来控制所述抽气充气装置抽气、充气或不动作。 A wire drawing furnace mouth sealing device according to claim 1, wherein said controller prestores a database of the relationship between the air pressure inside the retractable sealing ring and the theoretical diameter of said optical fiber preform, said controller Determining the air pressure in the retractable sealing ring and the pre-stored database to determine the theoretical diameter of the optical fiber preform, and based on the measured actual diameter of the optical fiber preform and the determined optical fiber preform theory The diameter is sized to control the pumping, inflating or inactive.
  7. 一种拉丝炉炉口密封控制方法，所述拉丝炉炉口密封控制方法应用于拉丝炉炉口密封装置，所述拉丝炉炉口密封装置包括可伸缩密封圆环、激光测径仪、气压传感器、抽气充气装置及控制器，其特征在于，所述方法包括： A drawing furnace mouth sealing control method, the drawing furnace mouth sealing control method is applied to a drawing furnace mouth sealing device, the drawing furnace mouth sealing device comprises a retractable sealing ring, a laser caliper, an air pressure sensor And an air inflator and a controller, wherein the method comprises:
    所述控制器从所述激光测径仪获取测量的光纤预制棒的实际直径d；The controller obtains the measured actual diameter d of the optical fiber preform from the laser caliper;
    所述控制器从所述气压传感器获取测量的可伸缩密封圆环内部的气压p；The controller acquires the measured air pressure p inside the retractable sealing ring from the air pressure sensor;
    所述控制器根据所述测量的可伸缩密封圆环内部的气压p及预存的可伸缩密封圆环内部的气压与所述光纤预制棒的理论直径关系数据库来确定所述光纤预制棒的理论直径D；The controller determines a theoretical diameter of the optical fiber preform according to the measured air pressure p inside the retractable sealing ring and a theoretical database of the relationship between the air pressure inside the pre-existing retractable sealing ring and the theoretical diameter of the optical fiber preform D;
    所述控制器判断所述测量的光纤预制棒的实际直径d是否等于所述确定的光纤预制棒的理论直径D；The controller determines whether the measured actual diameter d of the optical fiber preform is equal to the determined theoretical diameter D of the optical fiber preform;
    如果所述测量的光纤预制棒的实际直径d等于所述确定的光纤预制棒的理论直径D，所述控制器控制所述抽气充气装置不抽气及充气；If the measured actual diameter d of the optical fiber preform is equal to the determined theoretical diameter D of the optical fiber preform, the controller controls the pneumatic inflator not to pump and inflate;
    如果所述测量的光纤预制棒的实际直径d大于所述确定的光纤预制棒的理论直径D，所述控制器控制所述抽气充气装置抽气；If the measured actual diameter d of the optical fiber preform is greater than the determined theoretical diameter D of the optical fiber preform, the controller controls the suction airing device to pump air;
    如果所述测量的光纤预制棒的实际直径d小于所述确定的光纤预制棒的理论直径D，所述控制器控制所述抽气充气装置充气。If the measured actual diameter d of the optical fiber preform is less than the determined theoretical diameter D of the optical fiber preform, the controller controls the pneumatic inflator to inflate.
PCT/CN2017/080635 2016-08-29 2017-04-14 Apparatus for sealing furnace mouth of drawing furnace and control method therefor WO2018040574A1 (en)

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