CN117401898A - Device and equipment for improving high-temperature loss of graphite part of optical rod stretching furnace - Google Patents
Device and equipment for improving high-temperature loss of graphite part of optical rod stretching furnace Download PDFInfo
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- CN117401898A CN117401898A CN202311422673.1A CN202311422673A CN117401898A CN 117401898 A CN117401898 A CN 117401898A CN 202311422673 A CN202311422673 A CN 202311422673A CN 117401898 A CN117401898 A CN 117401898A
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- stretching furnace
- stretching
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 230000003287 optical effect Effects 0.000 title claims description 45
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 45
- 239000010439 graphite Substances 0.000 claims abstract description 45
- 238000010926 purge Methods 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims description 98
- 239000011261 inert gas Substances 0.000 claims description 44
- 238000010438 heat treatment Methods 0.000 claims description 26
- 238000001816 cooling Methods 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 7
- 239000007770 graphite material Substances 0.000 abstract description 5
- 238000007664 blowing Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 14
- 230000000694 effects Effects 0.000 description 7
- 239000013307 optical fiber Substances 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000004321 preservation Methods 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000007740 vapor deposition Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 241000238097 Callinectes sapidus Species 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
- C03B37/01257—Heating devices therefor
-
- 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
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
- C03B37/0124—Means for reducing the diameter of rods or tubes by drawing, e.g. for preform draw-down
-
- 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
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01446—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
-
- 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
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01466—Means for changing or stabilising the diameter or form of tubes or rods
-
- 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
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/018—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
- C03B37/01853—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
-
- 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
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/018—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
- C03B37/01861—Means for changing or stabilising the diameter or form of tubes or rods
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
The invention relates to a device and equipment for improving high-temperature loss of a graphite piece of a light bar stretching furnace, comprising the following steps: the stretching furnace comprises a stretching furnace body and a blowing component, wherein a first air seal ring is arranged at the top of the stretching furnace body, a second air seal ring is arranged at the bottom of the stretching furnace, a plurality of air inlets are circumferentially arranged on the outer walls of the first air seal ring and the second air seal ring, a plurality of air outlets are circumferentially arranged on the inner walls of the first air seal ring and the second air seal ring, one ends of the air outlets are communicated with the air inlets, and the other ends of the air outlets are communicated with the interior of the stretching furnace body; the first air seal ring and the second air seal ring are provided with a plurality of groups of air inlets and air outlets along the axis; the purging component comprises a gas heater, and the gas outlet end of the gas heater is respectively communicated with the gas inlets of the first gas seal ring and the second gas seal ring. The invention effectively reduces the height Wen Sunhao of the graphite piece of the stretching furnace, prolongs the service life of the graphite piece of the stretching furnace, and reduces quartz glass pollution caused by graphite material loss during stretching.
Description
Technical Field
The invention relates to the technical field of optical fiber perform stretching, in particular to a device and equipment for improving high-temperature loss of a graphite part of an optical rod stretching furnace.
Background
Optical fiber preforms are important blank materials for producing optical fibers, and various optical rod manufacturing processes are available, including OVD (outside vapor deposition), IVD (inside vapor deposition), VAD (axial vapor deposition), MCVD (modified chemical vapor deposition), PCVD (plasma chemical vapor deposition), optical rods manufactured by these processes or core material core rods thereof generally need to undergo high-temperature heating melting diameter changing before producing optical fibers, and a process of stretching from a large diameter to a small diameter is performed in order to eliminate flaws on the produced optical rods, or to perform assembly of an outer cladding layer, etc. The process is used as a transition process from the optical rod to the optical fiber, has extremely critical influence on the quality and cost of the optical fiber, and generally, a heating furnace used in the process has modes of resistance heating, induction heating, flame heating and the like, and because the material of the optical rod is quartz glass which is an insulator, an intermediate heating material is used as a heating body in the resistance heating mode and the induction heating mode, and heat is transferred to the quartz glass for indirect heating through heat radiation and heat conduction, the main current heating conductor material is graphite, the graphite is easy to react with air in a high-temperature state to cause oxidation loss, the graphite loss cost of the part accounts for more than half of the cost of the whole process, and in addition, the purity of the quartz glass is negatively influenced by particulate impurities generated by oxidation in the high-temperature state of the graphite.
The existing stretching heating furnace basically adopts an inert gas purging mode for protection, for example, as described in publication No. CN105217951A, CN102627399B, but the mode cannot well ensure the sealing effect of the furnace when the prefabricated bars with different sizes are stretched into the stretching bars with various specifications, the temperature in the furnace is reduced due to the fact that the flow of the gas purging is increased, the current power is increased, the furnace temperature is increased for compensation, and therefore the ageing of graphite materials in the furnace is accelerated.
Disclosure of Invention
Therefore, the invention aims to overcome the defect that the graphite aging speed in the heating furnace is high due to the stretching process of the prefabricated optical rod in the prior art.
In order to solve the technical problems, the invention provides a device for improving the high-temperature loss of a graphite piece of a light bar stretching furnace, which is characterized by comprising the following components:
the stretching furnace comprises a stretching furnace body, wherein a first air seal ring is arranged at the top of the stretching furnace body, a second air seal ring is arranged at the bottom of the stretching furnace body, a plurality of air inlets are circumferentially arranged on the outer walls of the first air seal ring and the second air seal ring, a plurality of air outlets are circumferentially arranged on the inner walls of the first air seal ring and the second air seal ring, one end of each air outlet is communicated with each air inlet, and the other end of each air outlet is communicated with the interior of the stretching furnace body; the first air seal ring and the second air seal ring are provided with a plurality of groups of air inlets and air outlets along the axis;
the purging component comprises a gas heater, and the gas outlet end of the gas heater is respectively communicated with the gas inlets of the first gas seal ring and the second gas seal ring.
In one embodiment of the invention, a gas buffer tank is arranged between the gas heater and the gas inlet, and a pressure gauge is arranged on the gas buffer tank.
In one embodiment of the invention, a temperature measuring instrument is arranged between the gas buffer tank and the gas inlets of the first gas seal ring and the second gas seal ring.
In one embodiment of the invention, the air inlet end of the air heater is provided with a solenoid valve.
In one embodiment of the invention, the gas heater comprises a shell, a plurality of heating plates are arranged on two sides of the inner wall of the shell in an inward extending mode, and two groups of heating plates are arranged in a crossing mode.
In one embodiment of the invention, the stretching furnace is provided with a first water-cooling ring at the port of the first air seal ring, and a second water-cooling ring is arranged at the fracture of the second air seal ring.
In one embodiment of the present invention, the first air seal ring, the second air seal ring, the first water cooling ring and the second water cooling ring are all coaxially arranged.
The equipment for improving the high-temperature loss of the graphite part of the optical rod stretching furnace comprises the device for improving the high-temperature loss of the graphite part of the optical rod stretching furnace, and further comprises an inert gas source, wherein the inert gas source is connected with the air inlet end of the gas heater.
In one embodiment of the invention, the inert gas source is comprised of high purity nitrogen.
In one embodiment of the invention, the stretching assembly further comprises a tower, a guide rail screw is arranged on one side of the tower along the axial direction, a first clamp and a second clamp are arranged on the guide rail screw, and the stretching furnace body is arranged between the first clamp and the second clamp.
In one embodiment of the invention, the first and second clamps are disposed coaxially with the stretching furnace body.
Compared with the prior art, the technical scheme of the invention has the following advantages:
according to the device and equipment for improving the high-temperature loss of the graphite piece of the optical rod stretching furnace, the heated inert gas is introduced into the stretching furnace body, so that the consumption of the inert gas is reduced while the inert gas is increased, the furnace temperature is reduced less by the preheated inert gas, the self temperature of the stretching furnace is reduced, the use intensity of graphite is further reduced, and the oxidation loss of graphite is reduced. Meanwhile, the air seal rings arranged in multiple layers form a seal on the stretching furnace body, so that heat dissipation of the stretching furnace is avoided, and the heat preservation effect of the stretching furnace is improved. The invention effectively reduces the height Wen Sunhao of the graphite piece of the stretching furnace, prolongs the service life of the graphite piece of the stretching furnace, and reduces quartz glass pollution caused by graphite material loss during stretching.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings, in which
FIG. 1 is a schematic view of a first embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the first and second gas seal rings of FIG. 1;
FIG. 3 is a schematic view of a longitudinal section of the first and second gas seal rings in FIG. 1;
FIG. 4 is a schematic view showing an internal structure of the gas buffer tank of FIG. 1;
FIG. 5 is a schematic diagram of a second embodiment of the present invention;
description of the specification reference numerals: 1. a stretching furnace body; 2. a purge assembly; 3. a control module; 4. a stretching assembly; 5. a light bar; 6. an auxiliary rod; 11. a first gas seal ring; 12. a second air seal ring; 13. a first water cooling ring; 14. a second water cooling ring; 21. a gas heater; 22. a gas buffer tank; 23. a temperature measuring instrument; 24. an electromagnetic valve; 41. a tower; 42. a guide rail lead screw; 43. a first clamp; 44. a second clamp; 111. an air inlet; 112. and an air outlet.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
Example 1
Referring to fig. 1 to 4, the invention discloses a device for improving high temperature loss of a graphite piece of a stretching furnace of an optical rod 5, which comprises:
the stretching furnace comprises a stretching furnace body 1, wherein a first air seal ring 11 is arranged at the top of the stretching furnace body 1, a second air seal ring 12 is arranged at the bottom of the stretching furnace body 1, a plurality of air inlets 111 are circumferentially arranged on the outer walls of the first air seal ring 11 and the second air seal ring 12, and a plurality of air outlets 112 are circumferentially arranged on the inner walls of the first air seal ring 11 and the second air seal ring 12; the first air seal ring 11 and the second air seal ring 12 are provided with a plurality of groups of air inlets 111 and air outlets 112 along the axis;
the purging component 2, the purging component 2 comprises a gas heater 21, one end of the gas heater 21 is connected with an inert gas source, and the other end of the gas heater 21 is respectively communicated with the gas inlets 111 of the first gas seal ring 11 and the second gas seal ring 12.
It can be seen that the invention mainly introduces the heated inert gas into the stretching furnace body 1, and the inert gas can avoid graphite oxidation in the stretching furnace body 1. Specifically, after the inert gas is heated by the gas heater 21, the inert gas is introduced into the first gas seal ring 11 and the second gas seal ring 12 which are arranged at two ports of the stretching furnace body 1, and the inert gas is preheated, so that the volume of the inert gas can be increased, and compared with the non-preheated gas, the gas consumption is less under the same purging flow; the mode of sweeping by using the preheated inert gas can be used for sweeping with large flow according to the gap between the optical rod 5 and the stretching furnace mouth, so that the sealing effect is ensured, compared with the non-preheated gas, the heat preservation effect on the furnace is better, the cost of graphite pieces in the furnace is reduced, compared with the non-preheated gas, the furnace temperature is reduced less, the required power compensation is small, and the power cost is saved.
As a preferable scheme of the invention, a plurality of air inlets 111 and air outlets 112 are arranged on the first air seal ring 11 and the second air seal ring 12 for a week, and the optical wand 5 is purged from a plurality of directions in the stretching process, so that the uniformity of purging is ensured. And at least three groups of air inlets 111 and air outlets 112 are formed in each first air seal ring 11 and each second air seal ring 12 along the axis, a plurality of seals are formed at two ports of the stretching furnace body 1, the air tightness of the air seal rings is further improved, and heat dissipation in the stretching furnace body 1 is avoided.
In the invention, the sizes of the first air seal ring 11 and the second air seal ring 12 can be changed according to the diameter of the optical rod 5, the first air seal ring 11 and the second air seal ring 12 with corresponding sizes are selected, and the gaps between the first air seal ring 11 and the second air seal ring 12 and the optical rod 5 are controlled, so that the excessive gaps are avoided, and the sealing effect is influenced.
According to the invention, the heated inert gas is introduced into the stretching furnace body 1, so that the consumption of the inert gas is reduced while the inert gas is increased, the furnace temperature is reduced by the preheated inert gas, the self-temperature supplement of the stretching furnace is reduced, the use intensity of graphite is further reduced, and the graphite oxidation loss is reduced. Meanwhile, the air seal rings arranged in multiple layers form a seal on the stretching furnace body 1, so that heat dissipation of the stretching furnace is avoided, and the heat preservation effect of the stretching furnace is improved. The invention effectively reduces the height Wen Sunhao of the graphite piece of the stretching furnace, prolongs the service life of the graphite piece of the stretching furnace, and reduces quartz glass pollution caused by graphite material loss during stretching.
Further, a gas buffer tank 22 is disposed between the gas heater 21 and the gas inlet 111, and a pressure gauge is disposed on the gas buffer tank 22.
Specifically, the heated inert gas is temporarily stored through the gas buffer tank 22, and a pressure gauge is added to the gas buffer tank 22 to detect the pressure in the gas buffer tank 22. In the use, the stability and the homogeneity of giving vent to anger of first gas seal ring 11 and second gas seal ring 12 can be guaranteed, the interruption or the unstability appear in the blowing of first gas seal ring 11 and second gas seal ring 12 to optical rod 5, the not tight problem of seal between first gas seal ring 11 and second gas seal ring 12 and the optical rod 5 is avoided appearing.
Further, a temperature measuring instrument 23 is disposed between the gas buffer tank 22 and the gas inlets 111 of the first gas seal ring 11 and the second gas seal ring 12.
Specifically, the temperature of the inert gas entering the first gas seal ring 11 and the second gas seal ring 12 is measured by the temperature measuring instrument 23, and the numerical value of the temperature measuring instrument 23 is observed to ensure the temperature of the inert gas entering the stretching furnace body 1. As the preferable scheme of the invention, the gas pipelines behind the gas outlet 112 of the gas heater 21 are all stainless steel electropolishing tubes (SS 316L-EP), the pipeline connection welding requires no scar on the inner wall, and the high-purity argon shielded welding ensures the tightness of the pipeline. The gas pipelines behind the gas outlets 112 of the gas heater 21 are wrapped with high-temperature-resistant ceramic fiber cotton materials for heat preservation, so that heat loss of inert gas in the conveying process is reduced. At the same time, the piping between the gas heater 21, the gas buffer tank 22 and the gas seal ring is as short as possible to reduce heat loss.
Further, a solenoid valve 24 is provided between the inert gas source and the gas heater 21. The electromagnetic valve 24 is used for controlling the flow of inert gas, and the light bars 5 with different diameters need to control the flow of inert gas in the stretching process so as to ensure the tightness of the first air seal ring 11 and the second air seal ring 12. Secondly, in the actual operation process, along with the stretching of the optical rod 5, the diameter of the optical rod 5 is gradually reduced, the gaps between the first air seal ring 11 and the second air seal ring 12 and the optical rod 5 are gradually increased, and the flow of inert gas is increased by controlling the opening of the electromagnetic valve 24 so as to ensure the tightness of the whole stretching furnace body 1. Preferably, the solenoid valve 24 is a diaphragm solenoid valve 24, and the operating mechanism of the diaphragm solenoid valve 24 is separated from the medium passage, so that the purity of the working medium is ensured, the possibility of impacting the working part of the operating mechanism in a pipeline is prevented, and the valve rod does not need to be sealed independently in any way. The purity of the inert gas is ensured, and the influence of mixed impurities on the stretching quality of the optical rod 5 is avoided.
Further, the gas heater 21 includes a housing, and a plurality of heating plates are disposed on two sides of the inner wall of the housing in an inward extending manner, and two groups of heating plates are disposed in a crossing manner.
As a preferable mode of the present invention, the gas heater 21 is a laminar flow type multistage gas heater 21, and the inert gas is heated by a heating plate after entering the gas heater 21. Preferably, a plurality of heating plates are arranged in a crossed mode, so that the contact area between the heating plates and the inert gas is increased, and the inert gas is heated up rapidly.
Further, a first water cooling ring 13 is arranged at the port of the first air sealing ring 11, and a second water cooling ring 14 is arranged at the fracture of the second air sealing ring 12. The first air seal ring 11, the second air seal ring 12, the first water cooling ring 13 and the second water cooling ring 14 are all coaxially arranged.
Specifically, the first water cooling ring 13 and the second water cooling ring 14 are respectively arranged at the ports of the first air sealing ring 11 and the second air sealing ring 12, and flowing water is introduced into the first water cooling ring 13 and the second water cooling ring 14 for cooling, so that injury to personnel caused by false collision is avoided.
Further, a control module 3 is also arranged, and the control module 3 is based on a PLC control system; specifically, the control module 3 is connected with the diaphragm electromagnetic valve 24 to control the opening and closing of the diaphragm electromagnetic valve 24; the control module 3 is connected with the gas heater 21 and is used for controlling the power of the gas heater 21 and changing the temperature of the inert gas; the control module 3 is connected with a pressure gauge on the buffer tank and is used for monitoring the pressure of the buffer pressure tank; the control module 3 is connected with a temperature measuring instrument 23 and is used for monitoring the temperature of the inert gas entering the stretching furnace body 1.
Example two
Referring to fig. 5, an apparatus for improving high temperature loss of a graphite member in a stretching furnace of an optical rod 5, which includes the apparatus for improving high temperature loss of a graphite member in a stretching furnace of an optical rod 5 according to the first embodiment, further includes a stretching assembly 4, the stretching assembly 4 includes a tower 41, a guide screw 42 is disposed on one side of the tower 41 along an axial direction, a first fixture 43 and a second fixture 44 are disposed on the guide screw 42, and the stretching furnace body 1 is disposed between the first fixture 43 and the second fixture 44.
In the actual working process, an inert gas source is connected with the gas inlet end of the gas heater 21 and is introduced into the stretching furnace body 1, and the stretching equipment of the optical rod 5 is completed by means of the external stretching assembly 4, specifically, the stretching furnace body 1 is arranged on one side of the tower 41, a guide rail lead screw 42 is arranged on one side of the tower 41, and a first clamp 43 and a second clamp 44 on the guide rail lead screw 42 are used for clamping the optical rod 5. Wherein a first clamp 43 is fixedly arranged at the top of the tower 41, a second clamp 44 moves along a guide screw 42, and the stretching furnace body 1 is arranged between the first clamp 43 and the second clamp 44. In the use process, the optical rod 5 is arranged inside the stretching furnace body 1 in a penetrating way, an auxiliary rod 6 is arranged between the optical rod 5 and the first clamp 43 and the second clamp 44, and the second clamp 44 drives the optical rod 5 to stretch while moving on the guide lead screw 42.
Further, the first clamp 43 and the second clamp 44 are coaxially disposed with the stretching furnace body 1, specifically, the first clamp 43 and the second clamp 44 are coaxially disposed with the stretching furnace body 1 in order to ensure uniformity of stretching of the optical rod 5. In the stretching process, the optical rod 5 is not contacted with the first air seal ring 11 and the second air seal ring 12, the first air seal ring 11 and the second air seal ring 12 with corresponding sizes are selected according to the diameter of the optical rod 5, and the inner diameters of the first air seal ring 11 and the second air seal ring 12 are slightly larger than the diameter of the optical rod 5.
Example III
The diameter of the light bar 5 isThe length is 3000mm, and the diameter of the auxiliary rod 6 is +.>Target stretch diameterThe inner diameter is chosen>The optical rod 5 is clamped and then enters the initial stretching position in the stretching furnace body 1; firstly, setting the air inlet flow of inert gas to be 17.5L/min, opening a diaphragm electromagnetic valve 24, introducing purified nitrogen, opening a laminar multi-stage gas heater 21 for heating, starting heating and stretching operation when the temperature of the gas measured by temperature measuring devices of two air inlets 111 of a first air seal ring 11 and a second air seal ring 12 is 546+/-2 ℃, and increasing the air inlet flow to 36.14L/min when an auxiliary rod 6 enters a furnace mouth air seal ring until stretching is completed when the auxiliary rod 6 is stretched to the tail end;
assuming atmospheric pressure, at ambient temperature of 23 ℃, a formula can be derived from the krabbe equation, pv=nrt, and the theoretical purge gas loss is reduced by 63.84% when the nitrogen is heated to 546±2 ℃ with the pressure unchanged compared to nitrogen at ambient temperature of 23 ℃.
Example IV
The diameter of the light bar 5 isThe length is 1000mm, and the diameter of the auxiliary rod 6 is +.>Target stretch diameterThe inner diameter is chosen>The optical rod 5 is clamped and then enters the initial stretching position in the furnace; firstly, setting the air inlet flow of inert gas to be 25L/min, opening a diaphragm electromagnetic valve 24, introducing purified nitrogen, opening a laminar multi-stage gas heater 21 for heating, starting heating and stretching operation when the temperature of the gas measured by temperature measuring devices of two air inlets 111 of a first air seal ring 11 and a second air seal ring 12 is 553+/-2 ℃, and increasing the air inlet flow to 56L/min when the auxiliary rod 6 enters the furnace mouth air seal ring until stretching is completed;
assuming atmospheric pressure, at ambient temperature of 23 ℃, a formula can be deduced from the krabbe equation, pv=nrt, and the theoretical purge gas loss is reduced by 62.96% when the nitrogen is heated to 526±2 ℃ with the volume increased by about 2.7 times compared to nitrogen at ambient temperature of 23 ℃ with the pressure calculated according to the formula.
In the actual production process, the sealing is carried out in a normal-temperature purging mode, the replacement period of the graphite central tube in the furnace is about 250 hours, the replacement period of the graphite heat-insulating layer in the furnace is about 620 hours, the result of stretching the optical wand 5 for a period of time by using the method provided by the invention after the replacement of the graphite central tube and the graphite heat-insulating layer is tracked, the replacement period of the graphite central tube in the furnace reaches about 600 hours, the use period of 140% is prolonged, the replacement period of the graphite heat-insulating layer reaches about 1550 hours, and the use period of 150% is prolonged.
In summary, the invention introduces a device and equipment for improving the high-temperature loss of a graphite piece of a stretching furnace of an optical rod 5, and the device and equipment are used for reducing the consumption of inert gas while increasing the inert gas by introducing heated inert gas into the stretching furnace body 1, reducing the furnace temperature by the preheated inert gas less, reducing the self temperature supplement of the stretching furnace, further reducing the use strength of graphite and reducing the oxidation loss of graphite. Meanwhile, the air seal rings arranged in multiple layers form a seal on the stretching furnace body 1, so that heat dissipation of the stretching furnace is avoided, and the heat preservation effect of the stretching furnace is improved. The invention effectively reduces the height Wen Sunhao of the graphite piece of the stretching furnace, prolongs the service life of the graphite piece of the stretching furnace, and reduces quartz glass pollution caused by graphite material loss during stretching.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (10)
1. The utility model provides a device for improving high temperature loss of optical wand stretching furnace graphite spare which characterized in that includes:
the stretching furnace comprises a stretching furnace body, wherein a first air seal ring is arranged at the top of the stretching furnace body, a second air seal ring is arranged at the bottom of the stretching furnace body, a plurality of air inlets are circumferentially arranged on the outer walls of the first air seal ring and the second air seal ring, a plurality of air outlets are circumferentially arranged on the inner walls of the first air seal ring and the second air seal ring, one end of each air outlet is communicated with each air inlet, and the other end of each air outlet is communicated with the interior of the stretching furnace body; the first air seal ring and the second air seal ring are provided with a plurality of groups of air inlets and air outlets along the axis;
the purging component comprises a gas heater, and the gas outlet end of the gas heater is respectively communicated with the gas inlets of the first gas seal ring and the second gas seal ring.
2. The device for improving the high-temperature loss of the graphite piece of the optical rod stretching furnace according to claim 1, wherein: and a gas buffer tank is arranged between the gas heater and the gas inlet, and a pressure gauge is arranged on the gas buffer tank.
3. The device for improving the high-temperature loss of the graphite piece of the optical rod stretching furnace according to claim 2, wherein: and thermometers are arranged between the gas buffer tank and the gas inlets of the first gas seal ring and the second gas seal ring.
4. The device for improving the high-temperature loss of the graphite piece of the optical rod stretching furnace according to claim 1, wherein: an electromagnetic valve is arranged at the air inlet end of the gas heater.
5. The device for improving the high-temperature loss of the graphite piece of the optical rod stretching furnace according to claim 1, wherein: the gas heater comprises a shell, a plurality of heating plates are inwards arranged on two sides of the inner wall of the shell in an extending mode, and the two groups of heating plates are arranged in a crossing mode.
6. The device for improving the high-temperature loss of the graphite piece of the optical rod stretching furnace according to claim 1, wherein: the stretching furnace is provided with a first water cooling ring at the port of the first air sealing ring, and a second water cooling ring is arranged at the fracture of the second air sealing ring.
7. The device for improving the high-temperature loss of the graphite piece of the optical rod stretching furnace according to claim 1, wherein: the first air seal ring, the second air seal ring, the first water cooling ring and the second water cooling ring are all coaxially arranged.
8. An apparatus for improving the high temperature loss of a graphite article in a rod stretching furnace, comprising the device for improving the high temperature loss of a graphite article in a rod stretching furnace according to any one of claims 1 to 7, wherein: the gas heater also comprises an inert gas source, wherein the inert gas source is connected with the gas inlet end of the gas heater.
9. The apparatus for improving the high temperature loss of a graphite article in a rod-stretching furnace of claim 8, wherein the inert gas source is high purity nitrogen.
10. The apparatus for improving high temperature loss of a graphite member of a light bar stretching furnace according to claim 8, further comprising a stretching assembly comprising a tower, wherein a guide screw is axially provided at one side of the tower, a first clamp and a second clamp are provided on the guide screw, and the stretching furnace body is disposed between the first clamp and the second clamp.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311422673.1A CN117401898A (en) | 2023-10-30 | 2023-10-30 | Device and equipment for improving high-temperature loss of graphite part of optical rod stretching furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311422673.1A CN117401898A (en) | 2023-10-30 | 2023-10-30 | Device and equipment for improving high-temperature loss of graphite part of optical rod stretching furnace |
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| CN202311422673.1A Pending CN117401898A (en) | 2023-10-30 | 2023-10-30 | Device and equipment for improving high-temperature loss of graphite part of optical rod stretching furnace |
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| CN (1) | CN117401898A (en) |
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- 2023-10-30 CN CN202311422673.1A patent/CN117401898A/en active Pending
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