OA17187A - Method and device for automatically controlling temperature of optical fiber coatings in wiredrawing process. - Google Patents
Method and device for automatically controlling temperature of optical fiber coatings in wiredrawing process. Download PDFInfo
- Publication number
- OA17187A OA17187A OA1201400543 OA17187A OA 17187 A OA17187 A OA 17187A OA 1201400543 OA1201400543 OA 1201400543 OA 17187 A OA17187 A OA 17187A
- Authority
- OA
- OAPI
- Prior art keywords
- optical fiber
- température
- wiredrawing
- charging pipeline
- heater
- Prior art date
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- 239000003365 glass fiber Substances 0.000 title claims abstract description 69
- 238000005491 wire drawing Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000001276 controlling effect Effects 0.000 title claims abstract description 15
- 238000000576 coating method Methods 0.000 claims abstract description 99
- 239000011248 coating agent Substances 0.000 claims abstract description 90
- 238000010438 heat treatment Methods 0.000 claims abstract description 47
- 239000007788 liquid Substances 0.000 claims description 15
- 239000000835 fiber Substances 0.000 claims description 2
- 238000010618 wire wrap Methods 0.000 claims 1
- 239000011247 coating layer Substances 0.000 abstract description 11
- 238000003754 machining Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229940056345 Tums Drugs 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001340 slower Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The present application relates to a method and an apparatus for automatically controlling the temperature of optical fiber coating in a wiredrawing process. The apparatus comprises an optical fiber coating device (4), wherein a coating chamber of the optical fiber coating device (4) is communicated with a charging bucket by a charging pipeline. The apparatus is characterized in that the charging pipeline is externally provided with a controllable heater (6) which is used for heating the coatings in the charging pipeline, the charging pipeline is also provided with a processing control unit which is used for comparing an acquired wiredrawing speed sensing signal and a charging pipeline temperature sensing signal with a preset parameter numerical value, so as to control the heating process of the controllable heater (6), so that the automatic controlling and adjusting process of the temperature of the coatings in the optical fiber coating device can be realized. According to the apparatus and the method, the temperature of the coatings in an optical fiber coating wiredrawing process can be automatically changed along with the wiredrawing speed, so that the temperature or the viscosity of the coatings can be well matched with the wiredrawing speed, and thus the quality of a coating layer on the surface of the optical fiber can be guaranteed, and the machining yield of the optical fiber can be improved.
Description
METHOD AND DEVICE FOR AUTO ΜΑΤΙ CALLY CONTROLLING TEMPERATURE OF OPTICAL FIBER COATING IN WIREDRAWING PROCESS
TECHNICAL FIELD
The présent application relates to a method and an apparatus for on-line controlling the température of optical fiber coating by a wet-on-wet coating process, which belongs to the field of optical fiber processlng technology.
BACKGROUND
An optical fiber coating Is one of the most two important materials of which an optical fiber is made. The main fonctions of the optical fiber coating include: mechanically protecting a bare optical fiber, maintainlng strength of the optical fiber, resisting to the corrosion of environment, maintaining and improving a bending property of the optical fiber, and the like. Therefore, the quality of the optical fiber coating may directly affect the quality and properties of the optical fiber. For a conventional télécommunication optical fiber, the glass optical fiber is usually coated with two coating layers on the surface thereof, wherein the allocation of the thickness and the ratio of the two coating layers may hâve a great Influence on service performances of the optical fiber, such as stripping force, micro bending property, environment testing property, etc. Therefore, the thickness and the ratio of the two coating layers must be controlled within a reasonable range.
Among the coating processes for the optical fiber coating, the wet-on-wet fiber coating process has the following disadvantages: (1) since chambers for two coating layers are arranged directly adjacent to each other, generally, coating cups of thereof are heated by a same water (or oil) bath cavity, and the chambers for the two coating layers can not be heated separately, However, according to the relative studies, the vlscous differential between the two layer coatings should be controlled within a reasonable range during a wiredrawing process by the wet-on-wet coating process. (2) Since the two coating layers are coated separately and the coating methods are different during the wiredrawing process, a mould for coating the second coating layer usually has a large hole diameter. In this way, It may easily lead to a larger coating diameter with this design during a low speed stage at the beginnlng of the wiredrawing, which in tums results in a scraped optical fiber.
With the development of the optical fiber manufacturing technology, the wiredrawing speed of the optical fiber becomes faster and faster. At présent, the wiredrawing speed Is generally more than 1500 m/min. In this case, It Is more and more difficult to meet the requirements for the coating process of the coating during a high speed wiredrawing process, when using the traditional heating method with a constant température. And thus, the coating quality of the optical fiber is hardly guaranteed. While the wet-on-wet coating process Is regarded as a suitable coating method for the high speed wiredrawing, however, the relative process and apparatus stiil need to be Improved In order to obtain the optical fiber with a better coating quality.
DISCLOURE OF THE PRESENT APPLICATION
TECHNICAL PROBLEMS
The objective of the présent application Is to provide a method and an apparatus for automatically controlling the température of optical fiber coating In a wiredrawing process, aiming at the above disadvantages In the prior art. In thls way, the température of the coating can be automatically changed along with the wiredrawing speed, so that the température (or the viscosity) of the coating can be well matched with the wiredrawing speed, and thus the quality of the coating iayers on the surface of the optical fiber can be guaranteed.
SOLUTIONSTO TECHNICAL PROBLEMS
TECHNICAL SOLUTIONS
In one aspect, the présent application provides a method for automatically controlling the température of optical fiber coating In a wiredrawing process, comprising an optical fiber coating device, wherein a coating chamber of the optical fiber coating device is communicated with a charging bucket by a charging pipeline, wherein the charging pipeline Is extemally provided with a controiiable heater which is used for heating the coating In the charging pipeline; the charging pipeline Is also provided with a processing control unit which is used for cornparing an acquired wiredrawing speed sensing signal and a charging pipeline température senslng signal with a preset parameter numérisai value, In order to control the heating process of the controiiable heater and further realize the automatîc controlling and adjusting process of the température of the coating In the optical fiber coating device.
In this embodiment, the processing controi unit Is a PLC unit which Is equlpped with a program defining a corresponding relationship between a wiredrawing speed and a température of the charglng pipeline; the heating of the controllable heater Is capable of belng automatically adjusted with the variation of the wiredrawing speed under the controi of the program of the PLC unit.
in this embodiment, the température of the charglng pipeline that Is automatically adjusted by the controllable heater ranges from 25-100Γ; and the charglng pipeline Is a pipeline made from métal.
In this embodiment, heating methods of the controllable heater includes an electrical heating method, a liquid medium heating method or a gas medium heating method.
In this embodiment, the optical fiber coating device has one or more coating chambers, each of which is connected to the charging pipeline respective!/, at least one charging pipeline Is provided with the controllable heater, for heating the coating In the at least one charglng pipeline.
In this embodiment, the relationship between the wiredrawing speed and the preset température of the charging pipeline set In the program of the PLC Is defined by a formula as follow.
y = a t(x-300)/100J2 + b(x-300)/100 + c wherein y is the preset température of the charging pipeline set in the PLC unit; x Is the wiredrawing speed; a Is a constant ranging from 0.1 to 0.6; b Is a constant ranging from 0.1 to 4; c Is a constant ranging from 20 to 40.
In another aspect, the présent application also provides an apparatus for automatically controlling the température of optical fiber coating in a wiredrawing process, which comprises an optical fiber coating device, wherein a coating chamber of the optical fiber coating device Is communicated with a charging bucket by a charging pipeline, wherein the charging pipeline Is extemaliy provided with a controllable heater, and the charglng pipeline Is also provided with a PLC unit; wherein an Input of the PLC unit Is respectively connected to a wiredrawing speed sensor and a charging pipeline température sensor, and an output of the PLC unit Is connected to a température control circuit of the controllable heater.
In thls embodiment, the wiredrawing speed sensor Is mounted on a traction wheel at a wiredrawing output; and the charging pipeline température sensor is mounted on the charging pipeline that Is dosed to the optical fiber coating device.
In this embodiment, the controllable heater is an e le et rie heater, and the electric heater consists of an electrical heating wire wrapplng up the charging pipeline.
In thls embodiment, the controllable heater Is a liquid medium heater or a gas medium heater, wherein the liquid medium heater or the gas medium heater Includes an annular heating trough encompassing the charging pipeline and a circulation heater connected to the annular heating trough, wherein the annular heating trough and the circulation heater are filled with liquid or gas medium.
ADVANTAGEOUS EFFECTS OF THE PRESENT APPLICATION
ADVANTAGEOUS EFFECTS
When Implementing the présent application, the following advantageous effects can be achieved: 1. The température of the controllable heater can be automatically adjusted along with the wiredrawing speed with the aid of the PLC; In this way, the température of the coating can be automatically adjusted along with the wiredrawing speed, so that the viscosity ofthe coating can be well matched with the wiredrawing speed. In the wiredrawing process, this way of automatically adjusting the température of the coating on one hand can randomly adjust the viscosity of the coating in each coating chamber, and thus the thickness, the ratio and the diameter of the optical fiber coating layers can be conveniently adjusted, and the problem that the thickness and the ratio of the two coating layers can not be randomly adjusted in a wet-on-wet coating process can be solved. On the other hand, the scrapping of the optical fiber resulted from overflowing of the coating, overiarge coating diameter, non-uniform coating and rippie presented on the coating interface can be reduced and prevented from occurring. Therefore, the quality of the coating layer on the surface of the optical fiber can be guaranteed and improved, and the machining yield of the optical fiber can be Improved. 2. The apparatus In the présent application has a simple structure and ls convenient for implement and promotion, and thus the automation level of the optical fiber processing equlpment can be improved.
BRIEF DESCRIPTION OF THE DRAWINGS
DESCRIPTION OF THE DRAWINGS
FIG 1 is a structural schematic view of an apparatus according to an embodiment of the présent application;
FIG 2 is a structural schematic view of an apparatus according to another embodiment of the présent application.
THE PREFERRED EMBODIMENT OF THE PRESENT APPLICATION
THE EMBODIMENT OFTHE PRESENT APPLICATION
Spécial Embodiments
The embodiments according to the présent application will now be described In detail with référencé to the accompanying drawings.
FIG 1 shows a first embodiment of the présent application. As shown In FIG 1, an apparatus using an electrical heating method ls provided, which comprises an optical fiber coating device 4, wherein a coating chamber of the optical fiber coating device ls communicated with a charging bucket by a charging pipeline. The optical fiber coating device has an upper coating chamber and a lower coating chamber. Wherein, the upper coating chamber is communicated with an upper 20 charging pipeline 5 which ls provided with or wlthout a controllable heater. The lower coating chamber is communicated with a lower charging pipeline 2. One or more layers of electrical heating wlres are wrapped on an extemal surface of the lower charging pipeline, and thus a controllable heater 6 is formed. A température sensor 3 ls used for measuring the température of the iower charging pipeline. Meanwhile, the température of the electrical heating wire ls adjusted by a preset température set In a PLC unit which ls connected to the electrical heating wire, wherein the preset température is set by a formula 1. A wiredrawing speed sensor signal of the PLC unit is acquired via a traction wheel. A valve 1 is arranged in the charging pipeline, and a discharging outlet of the charging pipeline is communlcated wîth the optical fiber coating devlce 4. During the wiredrawing process, the coating inside the charging pipeline Is heated by the electrical heating wire wrapped on the surface of the charging pipeline. When the heated coating enters into the optical fiber coating device 4, only few température ioss may occur since the heated charging pipeline is arranged adjacent to the optical fiber coating device 4, and thus the viscosity of the coating in a coating cup can be adjusted along with the température ofthe charging pipeline.
Before the start of the wiredrawing process, the valve 1 is ciosed, and the eiectricai heating wire Is not heating the charging pipeline since the wiredrawing speed Is zéro. After the wiredrawing process beglns, the valve is opened automaticaily. and the coating starts to flow, the electrical heating wire gradually heats the charging pipeline based on the preset température value set In the PLC unit. In this way, since the outer diameter of the optical fiber is usually relative large when the speed Is slow, the température of the charging pipeline can not be set too high. Otherwise, a plurality of optical fibers may be scrapped because of the overiarge outer diameter. When the wiredrawing speed increases, the température of the coating pipeline may be Increased based on the preset value set in the PLC unit, In order to make the viscosities of the two layers of coating match with each other and further to Increase the outer diameter of the optical fiber. When the wiredrawing speed slows down, the heating power of the electrical heating wire may be reduced, or the electrical heating wire stops heating. In this way, the température of the pipeline naturaily cools down to an object value. After the wiredrawing process has finlshed, the valve is automaticaily ciosed, the electrical heating wire stops heating, and the coating In the pipeline naturaily cools down to room température. Generally, It is unnecessary for the upper charging pipeline 5 ofthe first layer of coating to be heated up. The initial speed for heating the pipelines Is usually 300-400m/min.
THE PREFERRED EMBODIMENT OFTHE PRESENT APPLICATION
THE EMBODIMENT OF THE PRESENT APPLICATION
FIG 2 shows a second embodiment of the présent application. As shown In FIG 2, an apparatus using a heating method with the aid of liquid or gas medium is provided. Wherein, the différence between the apparatus provided in this embodiment and that provided In the above embodiment lies in that, the controilable heater 6 is a liquid or gas medium heater. The liquid or gas medium heater includes an annular heating trough encompassing the lower charging pipeline 2, and a circulation heater 7 connected to the annular heating trough. The annular heating trough and 5 the circulation heater are filled with liquid or gas medium. The circulation heater keeps heating the charging pipeline through heating the liquid or gas medium, In order to Increase the température of the coating, until the température of the coating Is closed to the température of the liquid or gas medium. According to the présent embodiment, a température sensor is mounted in the chamber of the circulation heater for the liquid or gas medium. The température sensor detects and 10 transmits the température of the liquid or gas medium that is regarded as the température of the charging pipeline to the PLC unit. Other configuration of the apparatus provided in this embodiment Is the same as that provided In the above embodiment.
Claims (10)
1. A method for automatically controlling the température of optical fiber coating in a wiredrawing process, comprislng an optical fiber coating device, wherein a coating chamber of the optical fiber coating device Is communlcated with a charging bucket by a charging pipeline, wherein the charging pipeline Is extemally provided with a controllable heater which Is used for heatlng the coating In the charging pipeline; the charging pipeline Is also provided with a processlng control unit which is used for comparing an acqulred wiredrawing speed sensing signal and a charging pipeline température sensing signai with a preset parameter numericai value, In order to control the heating process ofthe controllable heater and further realize the automatic controlling and adjusting process of the température ofthe coating In the optical fiber coating device.
2. The method for automatically controlling the température of optical fiber coating in a wiredrawing process according to daim 1, wherein the processlng control unit Is a PLC unit which Is equipped with a program defining a correspondîng relationship between a wiredrawing speed and a température of the charging pipeline; the heating of the controllable heater is capable of being automatically adjusted with the variation of the wiredrawing speed under the contre! of the program ofthe PLC unit.
3. The method for automatically controlling the température of optical fiber coating in a wiredrawing process according to daim 1 or 2, wherein the température of the charging pipeline that is automatically adjusted by the controllable heater ranges from 25-1ΟΟΌ.
4. The method for automatically controlling the température of optical fiber coating in a wiredrawing process according to daim 3, wherein heating methods of the controllable heater indudes an eiedrical heating method, a liquid medium heating method or a gas medium heating method.
5. The method for automatically controlling the température of opticai fiber coating In a wiredrawing process according to daim 1 or 2, wherein the optical fiber coating device has one or more coating chambers, each of which Is connected to the charging pipeline respedively; at least one charging pipeline is provided with the controllable heater, for heating the coating in the at ieast one charging pipeline.
6. The method for automatically controliing the température of optical fiber coating in a wiredrawing process according to claim 2, wherein the relationshlp between the wiredrawing speed and the preset température of the charging pipeline set in the program of the PLC is defined by a formula as foilow:
y = a [(x-300)/100]2 + b(x-300)/100 + c wherein y Is the preset température of the charging pipeline set In the PLC unit; x Is the wiredrawing speed; a Is a constant ranging from 0.1 to 0.6; b Is a constant ranging from 0.1 to 4; c is a constant ranging from 20 to 40.
7. An apparatus for automatically controliing the température of optical fiber coatings In a wiredrawing process, comprising an optical fiber coating device, wherein a coating chamber of the optical fiber coating device is communlcated with a charging bucket by a charging pipeline, wherein the charging pipeline is extemally provided with a controilable heater, and the charging pipeline is also provided with a PLC unit; wherein an input of the PLC unit is respectively connected to a wiredrawing speed sensor and a charging pipeline température sensor, and an output of the PLC unit is connected to a température control circuit of the controilable heater.
8. The apparatus for automatically controliing the température of optical fiber coating In a wiredrawing process according to claim 7, wherein the wiredrawing speed sensor is mounted on a traction wheel at a wiredrawing output; and the charging pipeline température sensor Is mounted on the charging pipeline that is dosed to the optical fiber coating device.
9. The apparatus for automatically controliing the température of optical fiber coating In a wiredrawing process according to daim 7 or 8, wherein the controilable heater Is an electric heater, and the electric heater consiste of an electrical heating wire wrapping up the charging pipeline.
10. The apparatus for automatically controliing the température of optical fiber coating In a wiredrawing process according to claim 7 or 8, wherein the controilable heater Is a liquid medium heater or a gas medium heater, wherein the Ifqutd medium heater or the gas medium heater includes an annular heating trough encompassing the charging pipeline and a circulation heater connected to the annular heating trough, wherein the annular heating trough and the circulation heater are filled with liquid or gas medium.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210200664.3 | 2012-06-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| OA17187A true OA17187A (en) | 2016-04-05 |
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