CN112194364A - Automatic furnace pressure monitoring system of optical fiber drawing furnace - Google Patents
Automatic furnace pressure monitoring system of optical fiber drawing furnace Download PDFInfo
- Publication number
- CN112194364A CN112194364A CN202011150052.9A CN202011150052A CN112194364A CN 112194364 A CN112194364 A CN 112194364A CN 202011150052 A CN202011150052 A CN 202011150052A CN 112194364 A CN112194364 A CN 112194364A
- Authority
- CN
- China
- Prior art keywords
- furnace
- optical fiber
- drawing furnace
- furnace pressure
- monitoring system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
The invention belongs to the technical field of optical fiber processing equipment, and particularly discloses an automatic furnace pressure monitoring system of an optical fiber drawing furnace, which comprises a drawing furnace, a preform, a sealing device, a filtering device, a first exhaust valve, an electric control device, a furnace pressure gauge and a shutter adjusting device, wherein the shutter adjusting device of the automatic furnace pressure monitoring system of the optical fiber drawing furnace comprises a shutter for controlling optical fiber discharge and a second exhaust valve for roughly adjusting the furnace pressure of the automatic furnace pressure monitoring system of the optical fiber drawing furnace, and the shutter adjusting device of the automatic furnace pressure monitoring system of the optical fiber drawing furnace and the furnace pressure gauge of the automatic furnace pressure monitoring system of the optical fiber drawing furnace are connected with the electric control device of the automatic furnace pressure monitoring system of the optical fiber drawing furnace. The automatic furnace pressure monitoring system of the optical fiber drawing furnace designed in the mode can enable the furnace pressure of the drawing furnace to be in a relatively stable state all the time, so that the stability of important indexes such as the diameter and attenuation of optical fibers in the production process is effectively improved, and the scrapping of the optical fibers is reduced.
Description
Technical Field
The invention relates to the technical field of optical fiber processing equipment, in particular to an automatic furnace pressure monitoring system of an optical fiber drawing furnace.
Background
The drawing furnace for producing optical fiber is based on electromagnetic induction heating principle, and utilizes induction coil to heat graphite body in the drawing furnace to high temperature above 2000 deg.C, so that the viscosity of tip portion of optical fiber prefabricated bar in the furnace can be reduced, and the optical fiber can be drawn by means of self-weight and traction force.
During drawing, inert gas is continuously input from the upper end and the lower end of the drawing furnace to avoid oxidation of the graphite piece, keep the environment in the furnace clean, and enable the gas to form laminar flow in a gap between the furnace wall and the preform rod, thereby ensuring the quality stability of drawn optical fiber. When the airflow in the wire drawing furnace is disturbed, the fluctuation of the temperature in the furnace can be caused because of the fluctuation of the airflow and the change of the pressure, and whether the temperature in the furnace is uniformly distributed is the most important factor of the quality of the optical fiber, so that the diameter fluctuation can be caused, the core cladding ratio and the refractive index distribution can be changed, and finally the diameter fluctuation, attenuation and other important indexes of the drawn optical fiber are scrapped.
The stable air current is the key point of production high quality optic fibre in the optic fibre wire drawing stove, and its most direct performance index is exactly the stove pressure, can confirm three important points through the monitoring to the stove pressure:
1. whether the sealing performance of the wire drawing furnace meets the requirement of positive pressure or not. If the upper opening seal of the wire drawing furnace is not well sealed when the rod is installed, the problem of air leakage is caused, so that the positive pressure cannot be reached in the wire drawing process;
2. whether the airflow in the wire drawing furnace is stable or not can cause the furnace pressure to fluctuate due to unstable airflow;
3. whether the furnace pressure of the drawing furnace is kept within a normal level or not, and the optical and transmission performance of the optical fiber is deteriorated or even scrapped due to the overhigh furnace pressure or the overlow furnace pressure.
Currently, no related accurate monitoring equipment for the above problems exists in the industry, and therefore, an automatic furnace pressure monitoring system for an optical fiber drawing furnace, which can solve the above problems, needs to be designed urgently.
Disclosure of Invention
The invention aims to provide an automatic furnace pressure monitoring system of an optical fiber drawing furnace, which can enable the furnace pressure of the drawing furnace to be in a relatively stable state all the time, thereby effectively improving the stability of important indexes such as the diameter and attenuation of optical fibers in the production process and reducing the scrappage of the optical fibers.
In order to achieve the purpose, the invention adopts the following technical scheme:
the automatic furnace pressure monitoring system of the optical fiber drawing furnace comprises the drawing furnace, a prefabricated rod inserted into the drawing furnace, a sealing device sleeved on the prefabricated rod and connected with an upper port of the drawing furnace in a sealing manner, a filtering device communicated with a plurality of first exhaust ports circumferentially and uniformly distributed on the peripheral surface of the sealing device, a first exhaust valve connected with the filtering device and used for finely adjusting the furnace pressure of the drawing furnace, an electric control device connected with the first exhaust valve, a furnace pressure meter connected with the lower end of the drawing furnace and a shutter adjusting device connected with a fiber outlet end of the drawing furnace, wherein the shutter adjusting device comprises a shutter used for controlling fiber outlet of an optical fiber and a second exhaust valve used for coarsely adjusting the furnace pressure of the drawing furnace, and the shutter adjusting device and the furnace pressure meter are connected with the electric control device.
Wherein, filter equipment includes the casing, follows radial second air inlet and the second gas vent that sets up of casing, set up in just follow in the cavity of casing the filter screen that the casing axial set up and parallel interval set up in first electrovalve and the second electrovalve of filter screen below, the second electrovalve is connected with the dust collection bag, first electrovalve with the second electrovalve all with the electrically controlled device electricity is connected.
The interface between the furnace body of the wire drawing furnace and the lower end of the extension glass tube is provided with a furnace pressure monitoring hole, and the furnace pressure meter is connected with the furnace pressure monitoring hole.
The sealing device is provided with a first air inlet which is convenient for filling argon and helium into the wire drawing furnace, and the first air inlet is provided with an air valve.
Wherein, a flowmeter and a pressure sensor which are convenient for obtaining furnace pressure parameters are arranged in the electric control device.
And the air pipe communicated with the first exhaust valve is connected with an external exhaust pipeline after passing through the electric control device.
The sealing device comprises a metal gas ring and a quartz glass ring which are arranged in a superposed mode, and a quartz pad which is arranged between a furnace opening of the wire drawing furnace and the quartz glass ring in a pressed mode.
The invention has the beneficial effects that: the invention discloses an automatic furnace pressure monitoring system of an optical fiber drawing furnace, which comprises the drawing furnace, a prefabricated rod inserted in the drawing furnace, a sealing device sleeved on the prefabricated rod and connected with an upper port of the drawing furnace in a sealing way, a filtering device communicated with a plurality of first exhaust ports uniformly distributed on the peripheral surface of the sealing device in the circumferential direction, a first exhaust valve connected with the filtering device and used for finely adjusting the furnace pressure of the drawing furnace, an electric control device connected with the first exhaust valve, a furnace pressure meter connected with the lower end of the drawing furnace, and a shutter adjusting device connected with a fiber outlet end of the drawing furnace, wherein the shutter adjusting device comprises a shutter used for controlling fiber outlet of optical fibers and a second exhaust valve used for roughly adjusting the furnace pressure of the drawing furnace, and the shutter adjusting device and the furnace pressure meter are both connected with the electric control device. The automatic furnace pressure monitoring system of the optical fiber drawing furnace designed in the mode can enable the furnace pressure of the drawing furnace to be in a relatively stable state all the time, so that the stability of important indexes such as the diameter and attenuation of optical fibers in the production process is effectively improved, and the scrapping of the optical fibers is reduced.
Drawings
FIG. 1 is a schematic connection diagram of an automatic monitoring system for furnace pressure of an optical fiber drawing furnace according to the present invention.
Fig. 2 is a schematic view of the structure of the filter device of fig. 1.
In the figure:
1. a wire drawing furnace; 2. performing a rod; 3. a sealing device; 4. a filtration device; 41. a housing; 42. a second air inlet; 43. a second exhaust port; 44. filtering with a screen; 45. a first electric valve; 46. a second electric valve; 47. a dust collection bag; 5. a first exhaust valve; 6. an electric control device; 7. a furnace pressure gauge; 8. a shutter adjusting device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
With reference to fig. 1 to 2, this embodiment provides an automatic furnace pressure monitoring system for an optical fiber drawing furnace, including the drawing furnace 1, insert the prefabricated stick 2 of locating in the drawing furnace 1, the cover is located prefabricated stick 2 and is connected sealing device 3 with the upper port sealing of drawing furnace 1, with a plurality of first exhaust port through connections's of circumference equipartition in sealing device 3 outer peripheral face filter equipment 4, be connected with filter equipment 4 and be used for the first exhaust valve 5 of fine setting drawing furnace 1 furnace pressure, the electric control unit 6 that is connected with first exhaust valve 5, the furnace pressure table 7 that is connected with the lower extreme of drawing furnace 1, and the shutter adjusting device 8 that is connected with the play fine end of drawing furnace 1, shutter adjusting device 8 and furnace pressure table 7 all are connected with electric control unit 6.
Adopt the automatic monitoring system of optic fibre wire drawing stove furnace pressure of above-mentioned connection structure design, accessible electrically controlled device 6 in time acquires each part parameter, optimizes then and adjusts each part parameter value, makes the furnace pressure of wire drawing stove 1 be in a relatively stable state all the time then to this stability of important indexes such as optic fibre diameter, decay in effectively improving production process reduces optic fibre and scraps.
More specifically, as a further preference, the shutter adjusting device 8 in this embodiment includes a shutter for controlling fiber drawing of the optical fiber, and a second exhaust valve for roughly adjusting the furnace pressure of the drawing furnace 1, and as a further preference, the shutter is set in a manner of pneumatic quick opening and closing, and the second exhaust valve is set in a manner of spiral slow opening, so that when the second exhaust valve releases the furnace pressure in the furnace, the pressure in the furnace can be slowly adjusted, and large fluctuation is avoided.
Furthermore, the filtering device 4 in this embodiment includes a housing 41, a second air inlet 42 and a second air outlet 43 disposed along the radial direction of the housing 41, a filter screen 44 disposed in the cavity of the housing 41 and disposed along the axial direction of the housing 41, and a first electric valve 45 and a second electric valve 46 disposed below the filter screen 44 in parallel and at intervals, wherein the second electric valve 46 is connected to a dust collecting bag 47, and both the first electric valve 45 and the second electric valve 46 are electrically connected to the electric control device 6. When the filterable dust of filter screen 44 falls first valve top and accumulates to the certain extent, second electrovalve 46 is closed, first electrovalve 45 is opened, make the dust fall in the cavity of second electrovalve 46 top, later close first electrovalve 45 rapidly, open second electrovalve 46, make the dust fall into and carry out centralized processing in the dust collection bag 47, filter equipment 4 that sets up with this mode can open and shut step by step through first electrovalve 45 and second electrovalve 46, make things convenient for the clearance of dust, can also avoid filter equipment 4 gas leakage simultaneously, then also more do benefit to the stability that the pressure measurement in-process keeps 1 stove of wire drawing furnace to press.
Furthermore, in order to obtain a relatively accurate furnace pressure in this embodiment, preferably, a furnace pressure monitoring hole is provided at a joint between the furnace body of the drawing furnace 1 and the extension glass tube at the lower end, and the furnace pressure gauge 7 is connected to the furnace pressure monitoring hole.
Furthermore, the sealing device 3 in this embodiment includes a metal gas ring and a quartz glass ring which are stacked, and a quartz cushion which is pressed between the furnace opening of the drawing furnace 1 and the quartz glass ring, so as to conveniently fill argon gas and helium gas into the drawing furnace 1, preferably, a first gas inlet is arranged on the metal gas ring and the quartz glass ring in a penetrating manner, and the first gas inlet is provided with a gas valve for preventing gas from flowing backwards.
Further, a flow meter and a pressure sensor which are convenient for acquiring furnace pressure parameters are arranged in the electric control device 6 in the embodiment. Preferably, the electric control device 6 is formed by combining monitoring devices such as a central processing unit and a touch screen, the first exhaust valve 5 and the shutter adjusting device 8 can be automatically regulated and controlled through a preset threshold value in the electric control device 6, so that the furnace pressure in the wire drawing furnace 1 is always in a relatively optimized and stable state, a better forming condition is provided for optical fiber production, and the processing yield of the optical fiber is improved.
In this embodiment, the air pipe connected to the first exhaust valve 5 is connected to an external exhaust pipe via the electric control device 6, so as to prevent air from flowing into the air pipe and polluting the environment.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (7)
1. An automatic furnace pressure monitoring system of an optical fiber drawing furnace is characterized by comprising a drawing furnace (1), a prefabricated rod (2) inserted in the drawing furnace (1), a sealing device (3) sleeved on the prefabricated rod (2) and hermetically connected with an upper port of the drawing furnace (1), a filtering device (4) which is in through connection with a plurality of first exhaust ports circumferentially and uniformly distributed on the peripheral surface of the sealing device (3), a first exhaust valve (5) connected with the filtering device (4) and used for finely adjusting the furnace pressure of the drawing furnace (1), an electric control device (6) connected with the first exhaust valve (5), a furnace pressure gauge (7) connected with the lower end of the drawing furnace (1) and a shutter adjusting device (8) connected with a fiber outlet end of the drawing furnace (1), wherein the shutter adjusting device (8) comprises a shutter used for controlling the fiber outlet of an optical fiber, and the second exhaust valve is used for roughly adjusting the furnace pressure of the wire drawing furnace (1), and the shutter adjusting device (8) and the furnace pressure meter (7) are connected with the electric control device (6).
2. The automatic furnace pressure monitoring system of the optical fiber drawing furnace as claimed in claim 1, wherein the filtering device (4) comprises a housing (41), a second air inlet (42) and a second air outlet (43) which are radially arranged along the housing (41), a filter screen (44) which is arranged in a cavity of the housing (41) and axially arranged along the housing (41), and a first electric valve (45) and a second electric valve (46) which are arranged below the filter screen (44) at intervals in parallel, the second electric valve (46) is connected with a dust collecting bag (47), and the first electric valve (45) and the second electric valve (46) are both electrically connected with the electric control device (6).
3. The automatic furnace pressure monitoring system of the optical fiber drawing furnace according to claim 1, wherein a furnace pressure monitoring hole is arranged at the interface of the furnace body of the drawing furnace (1) and the lower end of the extension glass tube, and the furnace pressure gauge (7) is connected with the furnace pressure monitoring hole.
4. The automatic furnace pressure monitoring system for the optical fiber drawing furnace as claimed in claim 1, wherein the sealing device (3) is provided with a first air inlet for conveniently filling argon and helium into the drawing furnace (1), and the first air inlet is provided with an air valve.
5. The automatic furnace pressure monitoring system of the optical fiber drawing furnace as claimed in claim 1, wherein a flow meter and a pressure sensor which are convenient for obtaining furnace pressure parameters are arranged in the electric control device (6).
6. The automatic furnace pressure monitoring system of the optical fiber drawing furnace as claimed in claim 1, wherein an air pipe communicated with the first exhaust valve (5) is connected with an external exhaust pipeline through the electric control device (6).
7. The automatic furnace pressure monitoring system of the optical fiber drawing furnace according to claim 1, wherein the sealing device (3) comprises a metal gas ring and a quartz glass ring which are arranged in a stacked manner, and a quartz pad which is arranged between a furnace opening of the drawing furnace (1) and the quartz glass ring in a pressed manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011150052.9A CN112194364A (en) | 2020-10-23 | 2020-10-23 | Automatic furnace pressure monitoring system of optical fiber drawing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011150052.9A CN112194364A (en) | 2020-10-23 | 2020-10-23 | Automatic furnace pressure monitoring system of optical fiber drawing furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112194364A true CN112194364A (en) | 2021-01-08 |
Family
ID=74011075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011150052.9A Pending CN112194364A (en) | 2020-10-23 | 2020-10-23 | Automatic furnace pressure monitoring system of optical fiber drawing furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112194364A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115710085A (en) * | 2022-11-02 | 2023-02-24 | 江苏亨通光纤科技有限公司 | Air inlet control system and control method for wire drawing furnace |
-
2020
- 2020-10-23 CN CN202011150052.9A patent/CN112194364A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115710085A (en) * | 2022-11-02 | 2023-02-24 | 江苏亨通光纤科技有限公司 | Air inlet control system and control method for wire drawing furnace |
| CN115710085B (en) * | 2022-11-02 | 2024-06-18 | 江苏亨通光纤科技有限公司 | Air inlet control system and control method of wire drawing furnace |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112194364A (en) | Automatic furnace pressure monitoring system of optical fiber drawing furnace | |
| CN102933511B (en) | Reactor core tube inspection method and production method of parent metal for silica glass optical fibre | |
| CN107601840A (en) | Segmented preform sintering furnace device and corresponding optical wand sintering method | |
| CN103819084B (en) | Optical fiber drawing furnace | |
| EP2938580B1 (en) | Methods for fabricating optical fiber preform and optical fiber | |
| CN214361012U (en) | Automatic furnace pressure monitoring system of optical fiber drawing furnace | |
| CN111423106A (en) | Sintering device and sintering method for loose body of optical fiber preform | |
| CN108958341B (en) | Atmosphere control system and method for additive manufacturing laser forming equipment | |
| CN108409130A (en) | Drawing optical fibers annealing device | |
| CN206014697U (en) | A kind of fiber drawing furnace furnace mouth seal device | |
| CN113213750B (en) | Special optical fiber perform sealing device | |
| US20100294002A1 (en) | Optical fiber preform manufacturing method | |
| CN110759647A (en) | High-speed optical fiber drawing ultraviolet curing device | |
| CN109678339B (en) | H is used 2 Optical fiber drawing furnace apparatus and method | |
| CN2745059Y (en) | Four-way three-step servo valve core and valve pocket detecting device | |
| TW452639B (en) | Draw furnace sealing assembly and method | |
| CN106768811A (en) | High-frequency induction wind-tunnel vacuum pressure regulating system and pressure regulating method | |
| CN200996853Y (en) | Liquid-level gauge | |
| CN212864574U (en) | Optical fiber drawing device | |
| CN211770944U (en) | High-speed optical fiber drawing ultraviolet curing device | |
| CN106595943A (en) | Device for measuring pressure of liquid crystal glass tank | |
| CN210915834U (en) | Furnace core pipe internal pressure control cabinet | |
| JP7397169B2 (en) | Optical fiber base material manufacturing method and heating furnace | |
| CN219709375U (en) | Furnace pressure test system of optical fiber drawing induction furnace | |
| CN108361187A (en) | A kind of electromagnetic pump comprehensive performance testing system and its application method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |