CN103951181B - A kind of sleeve pipe prefabricated rods of structure-improved and manufacture method thereof - Google Patents
A kind of sleeve pipe prefabricated rods of structure-improved and manufacture method thereof Download PDFInfo
- Publication number
- CN103951181B CN103951181B CN201410154728.XA CN201410154728A CN103951181B CN 103951181 B CN103951181 B CN 103951181B CN 201410154728 A CN201410154728 A CN 201410154728A CN 103951181 B CN103951181 B CN 103951181B
- Authority
- CN
- China
- Prior art keywords
- sleeve pipe
- caudal peduncle
- plug
- dribbling
- tail pipe
- 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.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Landscapes
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
The present invention relates to a kind of sleeve pipe prefabricated rods and manufacture method thereof of structure-improved, also relate to a kind of technology using plug to add the preform manufacture technics optical fiber of sleeve pipe.The impact that this technology can avoid wire-drawing operation to cause optical fiber water peak parameter effectively, improves the geometrical property of optical fiber simultaneously.Be made up of mandrel component, thimble assembly; Mandrel component inserts in thimble assembly in vertical direction, forms sleeve pipe prefabricated rods; Mandrel component comprises plug, excessively caudal peduncle and dribbling caudal peduncle; Cone is drawn in plug bottom, and top is connected with excessive caudal peduncle; Excessive caudal peduncle upper connecting straps ball caudal peduncle; Dribbling caudal peduncle is provided with spheroid.Thimble assembly comprises sleeve pipe, transition conduit, location tail pipe and chuck tail pipe, and casing part is drawn into taper, and excises tapered tip position, and form a ventilating pit, sleeve pipe top is connected with transition conduit; Transition conduit top is connected with location tail pipe; Enlarging process is carried out on tail pipe top, location, is set to hydraucone shape, is connected with chuck tail pipe.
Description
Technical field
The present invention relates to a kind of sleeve pipe prefabricated rods and manufacture method thereof of structure-improved, also relate to a kind of technology using plug to add the preform manufacture technics optical fiber of sleeve pipe, this technology can effectively avoid wire-drawing operation on optical fiber water peak parameter cause impact, improve the geometrical property of optical fiber simultaneously.
Background technology
The manufacturing processed of optical fiber generally includes 3 operations: the 1) manufacture of plug, 2) manufacture of surrounding layer, 3) high temperature wire drawing manufactures optical fiber.The surrounding layer technology that adds of current main flow has: outsourcing sedimentation (OVD), sleeve pipe melt contracting method (RIT) and sleeve pipe fiber elongation method (RIC).Wherein, outsourcing and wire drawing unite two into one by sleeve pipe drawing process, are widely used due to advantages such as its technique simple and flexible, equipment investment are low, be suitable for various size prefabricated rods.
The flow process of sleeve pipe drawing process mainly can be divided into following step: (1) thimble assembly makes and tail end draws cone; (2) mandrel component makes; (3) mandrel component inserts in thimble assembly and is assembled into prefabricated rods assembly; (4) the prefabricated rod assembly of melting carry out wire drawing under 2000 DEG C of high temperature.In order to the air in Decanning and moisture content, ensure sleeve pipe and the gentle line of plug bubble-free when wire-drawing operation is melted into one simultaneously, process must be vacuumized to sleeve pipe.
Existing prefabricated rod assembly generally adopts in assembling: contacted with sleeve pipe tapered portion plug one lower end, top uses specific tightness system to fix, and to vacuumizing process (as shown in Figure 1) in sleeve pipe one.This clamping method is not only installed loaded down with trivial details, complicated operation; And be difficult to ensure right alignment and the gap uniformity between the two of plug one (12) and sleeve pipe one (13).The sleeve pipe prefabricated rods that these problems make existing assembling mode make, easily causes between sandwich layer and covering when drawing optical fiber and produces concentricity deviation, thus easily occur gas line and bubble.In addition, in existing thimble assembly making processes, if adopt oxyhydrogen blowtorch to draw cone, water vapor will enter sleeve pipe one, and is condensed into liquid water stain at inside pipe wall.Because now sleeve pipe one seals, in sleeve pipe one, gas cannot circulate, and these moisture content just cannot be removed; In drawing process, these moisture content can have a strong impact on fiber products quality, cause 1383nm decay in optical fiber to increase.
Summary of the invention
The object of the invention is the weak point existed for above-mentioned existing sleeve pipe drawing process, a kind of sleeve pipe prefabricated rods and manufacture method thereof of structure-improved are provided, a kind of technology using plug to add the preform manufacture technics optical fiber of sleeve pipe is also provided.A kind of realize autocollimating sleeve pipe prefabricated rods assembly method with plug gravity, and a kind of method of moisture content in effective removal sleeve pipe.The present invention can effectively avoid wire-drawing operation on optical fiber water peak parameter cause impact, improve the geometrical property of optical fiber simultaneously.
The sleeve pipe prefabricated rods of a kind of structure-improved of the present invention and manufacture method thereof take following technical scheme to realize:
A kind of sleeve pipe prefabricated rods of structure-improved is made up of mandrel component, thimble assembly; During assembling, mandrel component is inserted in thimble assembly in vertical direction, form the sleeve pipe prefabricated rods in the present invention.
Mandrel component comprises plug, transition caudal peduncle and dribbling caudal peduncle.Cone is drawn in plug bottom, and top is connected with transition caudal peduncle; Transition caudal peduncle upper connecting straps ball caudal peduncle; Dribbling caudal peduncle is provided with spheroid, and its bulb cuts out four ventilating groove 23-2, the circular diameter after cutting ventilating groove consistent with dribbling caudal peduncle upper and lower part diameter (namely depth of cut equals the difference of the cross section radius of circle of bulb and dribbling caudal peduncle upper and lower part).
Thimble assembly comprises sleeve pipe, transition conduit, location tail pipe and chuck tail pipe.Casing part is drawn into taper, and excises tapered tip position, and form the ventilating pit of a 2 ~ 10mm, sleeve pipe top is connected with transition conduit; Transition conduit top is connected with location tail pipe; Enlarging process is carried out on tail pipe top, location, is set to hydraucone shape, and is connected with chuck tail pipe.
The spheroid of described dribbling caudal peduncle contacts with the inwall of enlarging caudal peduncle.
The present invention for solve core cald concentricity and gap uniformity problem designed by technical scheme, adopt the mode that the spheroid of dribbling caudal peduncle contacts with the inwall of enlarging caudal peduncle, just can realize the function of its automatic centering according to the action of gravity of plug self, thus ensure that the concentricity of plug and sleeve pipe.
Below the detailed description of each partial design:
Described plug: the scope of its external diameter OD1 is: the scope of 5 ~ 60mm, length L1 is: 300 ~ 3000mm, carries out deposition sintering by Glass tubing and is made on core rod lathe.
Described sleeve pipe: the scope of its internal diameter ID4 is: (OD1+1) ~ (OD1+6) mm, length L4 scope is: L4 >=(L1+20) mm, external diameter OD4 is determined by the design of optical fiber.
Described transition caudal peduncle: for connecting plug and dribbling caudal peduncle, the scope of its external diameter OD2 is: OD2≤(ID4-2) mm.
Described transition conduit: in drawing process, in order to avoid affecting fiber products quality because of airflow fluctuation when transition conduit enters fiber drawing furnace, its external diameter OD5 should try one's best close with the external diameter of sleeve pipe, and the scope of OD5 is:
|oD5-OD1
|/oD1≤3%, the scope of internal diameter ID5 is: (OD5-6) ~ (ID4+2) mm, its length L5 are determined by the design of fiber drawing furnace hot-zone and the length of its upper end muffle tube.
Described dribbling caudal peduncle: detailed construction as shown in Figure 3, the scope of its ball external diameter ODB is: ODB >=(OD1+6) mm, the scope of ball both sides quartz handle external diameter OD3 is: OD3≤(ODB-8) mm, this caudal peduncle lower length is suitable at 100 ~ 200mm, and spheroid top quartz handle length determined according to the length of vacuum extractor and sleeve pipe caudal peduncle; Concrete making method is as follows: the glass stick of selected external diameter slowly softens through high temperature sintering on glass work lathe, to third side to mobile one end chuck, the glass at its high temperature place is extruded formation spherical; Process further on mechanical lathe after cooling, to reach corresponding tolerance; Re-use cutting machine after machining and cut out four symmetrical ventilating grooves at spherical place, the circular diameter consistent with top and the bottom diameter (namely depth of cut equals the difference of the cross section radius of circle of bulb and top and the bottom) after cutting ventilating groove, width 1 ~ 4mm; Cutting need ensure the neat of otch, forbids to produce chipping, gap phenomenon, carries out flame polish after cutting; The processing of dribbling caudal peduncle needs control two form and position tolerances: the 1. right alignment of spheroid two ends glass stick, controls within Φ 0.2mm; 2. the circularity of spheroid, controls within Φ 0.1mm.
Described chuck tail pipe: the scope of its internal diameter ID7 is: ID7 >=(ODB+2) mm.In order to keep out the clamping force of chuck, need to ensure enough structural strengths, the scope of external diameter OD7 is: OD7 >=(ID7+10) mm.Its length L7 determines according to the position of the length of chucks and vacuum extractor, and the scope of L7 is 250 ~ 650mm.
Described location tail pipe: scope (Max (OD1, OD3)+3) mm ~ (ODB-4) mm of its internal diameter ID6.Its external diameter OD6 scope: (ID6+5) ~ Min (OD5, OD7).Enlarging external diameter in upper end is consistent with chuck tail pipe external diameter, and enlarging external diameter in lower end is consistent with transition conduit external diameter.Its length L6 is determined by the minimum allowable range of chuck and fiber drawing furnace, the scope >=150mm of L6.
A kind of manufacture method of sleeve pipe prefabricated rods of structure-improved takes following steps to realize:
One, the Making programme of mandrel component:
(1) plug is made: on core rod lathe, after deposition sintering, be made into plug, its underpart pulled into taper, can use in testing tool precast rod refractivity detecting and analysing system (P104, PK2600) test passes after cooling.
(2) transition caudal peduncle is selected: the glass stick selecting corresponding size according to the external diameter of plug and length, as transition caudal peduncle.
(3) make dribbling caudal peduncle: according to glass stick high temperature sintering on glass work lathe that the size of plug is selected, slowly soften, to third side to mobile one end chuck, the glass at its high temperature place is extruded formation spherical; Process further on mechanical lathe after cooling, to reach corresponding tolerance; Re-use cutting machine after machining and cut out four symmetrical ventilating grooves at spherical place, the circular diameter consistent with top and the bottom diameter (namely depth of cut equals the difference of the cross section radius of circle of bulb and top and the bottom) after cutting ventilating groove, width 1 ~ 4mm; Cutting need ensure the neat of otch, forbids to produce chipping, gap phenomenon, carries out flame polish after cutting; The processing of dribbling caudal peduncle needs control two form and position tolerances: the 1. right alignment of spheroid two ends glass stick, controls within Φ 0.2mm; 2. the circularity of spheroid, controls within Φ 0.1mm.
(4) mandrel component welding: dribbling target rod bottom is welded mutually with transition conduit, and transition conduit lower weld has plug, forms mandrel component; Carry out alignment operation after having welded, require that the bow degree of its entirety must be less than 0.5mm/m(optimized scope and require to be less than 0.1mm/m).
Two, the Making programme of thimble assembly:
(1) sleeve pipe is made: according to the external diameter of plug and the sleeve pipe of length selection corresponding size, casing part is drawn into taper, and excises tapered tip position, form the ventilating pit of a 2 ~ 10mm.
(2) transition conduit is selected: the transition conduit selecting corresponding size according to the requirement of design.
(3) make location tail pipe: enlarging process is carried out on tail pipe top, location, is set to hydraucone shape, guarantee hydraucone external diameter and chuck tail pipe external diameter consistent, the angle of enlarging 45 degree; Bottom determines whether to need to carry out enlarging process according to the external diameter of transition conduit, needs to ensure that external diameter is between the two consistent.
(4) chuck tail pipe is selected: the chuck tail pipe selecting corresponding size according to the requirement of design.
(5) thimble assembly welding: welded mutually with chuck tail pipe on tail pipe top, location, bottom is welded mutually with transition conduit, and transition conduit bottom is welded mutually with sleeve pipe, forms thimble assembly; Alignment operation is carried out to thimble assembly, requires that its bow degree must be less than 1mm/m(optimized scope and require to be less than 0.5mm/m).
Three, the assembling of mandrel component and thimble assembly:
Mandrel component and the timing of thimble assembly integral installation, should ensure to insert in sleeve pipe by plug in vertical direction as far as possible, avoids because plug and internal surface of sleeve pipe collide, rub and cause the scuffing of glass surface.
Now the impetus of plug is the spheroid outside of dribbling caudal peduncle, and the spheroid of dribbling caudal peduncle contacts with the inwall of enlarging caudal peduncle, under gravity, just can realize the autocollimating effect of plug, namely make a kind of sleeve pipe prefabricated rods of structure-improved.
A kind of method of sleeve pipe prefabricated rods manufacture optical fiber of structure-improved is as follows:
The sleeve pipe prefabricated rods of the structure-improved after having assembled is carried out clamping by the chuck of wire-drawer-tower fix, to fiber drawing furnace heat temperature raising, when temperature rises to 1850 ~ 1950 DEG C, preform cone head is slowly dropped to wire drawing fire door preheating 3 ~ 5 minutes; Determine lower excellent distance according to fiber drawing furnace hot-zone apart from fire door length, then preform cone subordinate is down to the hot-zone place of fiber drawing furnace; After 3 ~ 5 minutes, start vacuum pump until prefabricated rods heating, sleeve pipe is bled operation, remove the water vapour that inside pipe casing produces because of welding.Treat the aperture completely dissolve of prefabricated rods conehead, start wire-drawing operation, make optical fiber.
In order to avoid the water peak in drawing process increase optical fiber to greatest extent, in the drawing process after the ventilating pit of casing part tapered tip disappears, the absolute pressure of inside pipe casing need ensure lower than 50mbar.
The invention has the advantages that: 1, have wide range of applications, the plug of applicable different size scope and sleeve pipe.2, because dribbling caudal peduncle is provided with spheroid, locate tail pipe tangent with outside, under gravity, can realize the autocollimating function of plug, can optimize the concentricity parameter of plug and sleeve pipe, raising optical fiber quality; 3, because the top at sleeve pipe is provided with ventilating pit, the difficult problem that in sleeve pipe, moisture content cannot be removed can be efficiently solved; 4, the assembling of plug and sleeve pipe is simpler and easy, easy to operate, greatly reduces the regulating time of operator during dress rod, improves production efficiency.
Accompanying drawing explanation
Below with reference to accompanying drawing, the invention will be further described:
Accompanying drawing 1 is the structural representation for existing sleeve pipe prefabricated stick drawn wire technique.
In figure: 11, plug one, 12, caudal peduncle, 13, sleeve pipe one, 14, transition conduit one, 15, chuck tail pipe one.
Accompanying drawing 2 is structural representations of the sleeve pipe prefabricated rods improvement rear sleeve prefabricated stick drawn wire technique of structure-improved of the present invention.
In figure: 21, plug, 22, transition caudal peduncle, 23, dribbling caudal peduncle, 24, sleeve pipe, 25, transition conduit, 26, location tail pipe, 27, chuck tail pipe.
Accompanying drawing 3 is dribbling caudal peduncle structural representations of the sleeve pipe prefabricated rods of structure-improved of the present invention.
Accompanying drawing 4 is ventilating groove structural representations of the spheroid of the dribbling caudal peduncle of the sleeve pipe prefabricated rods of structure-improved of the present invention.
Accompanying drawing 5 is device schematic diagram that the present invention removes moisture content between plug and sleeve pipe:
In figure: 21, plug, 24, sleeve pipe, 43, fiber drawing furnace, 44, graphite piece.
Embodiment
With reference to accompanying drawing 1 ~ 5, a kind of sleeve pipe prefabricated rods of structure-improved is made up of mandrel component, thimble assembly; During assembling, mandrel component is inserted in thimble assembly in vertical direction, form the sleeve pipe prefabricated rods in the present invention.Both concrete compositions and mutual relationship as follows:
Mandrel component comprises plug 21, transition caudal peduncle 22 and dribbling caudal peduncle 23.Cone is drawn in plug 21 bottom, and top is connected with transition caudal peduncle 22; Transition caudal peduncle 22 upper connecting straps ball caudal peduncle 23; Dribbling caudal peduncle 23 is provided with spheroid (23-1), and its bulb cuts out four ventilating groove 23-2, the circular diameter consistent with top and the bottom diameter (namely depth of cut equals the difference of the cross section radius of circle of bulb and top and the bottom) after cutting ventilating groove.
Thimble assembly comprises sleeve pipe 24, transition conduit 25, location tail pipe 26 and chuck tail pipe 27.Sleeve pipe 24 bottom is drawn into taper, and excises tapered tip position, and form the ventilating pit of a 2 ~ 10mm, sleeve pipe 24 top is connected with transition conduit 25; Transition conduit 25 top is connected with location tail pipe 26; Enlarging process is carried out on tail pipe 26 top, location, is set to hydraucone shape, and is connected with chuck tail pipe 27.
The spheroid of described dribbling caudal peduncle (23) contacts with the inwall of enlarging caudal peduncle (26).
Fig. 2 be the present invention for solve core cald concentricity and gap uniformity problem designed by technical scheme, adopt the mode that the spheroid of dribbling caudal peduncle (23) contacts with the inwall of enlarging caudal peduncle (26), just can realize the function of its automatic centering according to the action of gravity of plug (21) self, thus ensure that the concentricity of plug and sleeve pipe.
Below the detailed description of each partial design:
Described plug (21): the scope of its external diameter OD1 is: the scope of 5 ~ 60mm, length L1 is: 300 ~ 3000mm, carries out deposition sintering by Glass tubing and is made on core rod lathe.
Described sleeve pipe (24): the scope of its internal diameter ID4 is: (OD1+1) ~ (OD1+6) mm, length L4 scope is: L4 >=(L1+20) mm, external diameter OD4 is determined by the design of optical fiber.
Described transition caudal peduncle (22): for connecting plug (21) and dribbling caudal peduncle (23), the scope of its external diameter OD2 is: OD2≤(ID4-2) mm.
Described transition conduit (25): in drawing process, affects fiber products quality because of airflow fluctuation when transition conduit (25) enters fiber drawing furnace, and its external diameter OD5 should try one's best close with the external diameter of sleeve pipe (24), and the scope of OD5 is:
|oD5-OD1
|/oD1≤3%, the scope of internal diameter ID5 is: (OD5-6) ~ (ID4+2) mm, its length L5 are determined by the design of fiber drawing furnace hot-zone and the length of its upper end muffle tube.
Described dribbling caudal peduncle (23): detailed construction as shown in Figure 3, the scope of its ball external diameter ODB is: ODB >=(OD1+6) mm, the scope of ball both sides quartz handle external diameter OD3 is: OD3≤(ODB-8) mm, this caudal peduncle lower length is suitable at 100 ~ 200mm, and spheroid top quartz handle length determined according to the length of vacuum extractor and sleeve pipe caudal peduncle (24); Concrete making method is as follows: the glass stick of selected external diameter slowly softens through high temperature sintering on glass work lathe, to third side to mobile one end chuck, the glass at its high temperature place is extruded formation spherical; Process further on mechanical lathe after cooling, to reach corresponding tolerance; Re-use cutting machine after machining and cut out four symmetrical ventilating grooves at spherical place, the degree of depth of groove is consistent with the rod outside diameter of top and the bottom, width 1 ~ 4mm; Cutting need ensure the neat of otch, forbids to produce chipping, gap phenomenon, carries out flame polish after cutting; The processing of dribbling caudal peduncle needs control two form and position tolerances: the 1. right alignment of spheroid two ends glass stick, controls within Φ 0.2mm; 2. the circularity of spheroid, controls within Φ 0.1mm.
Described chuck tail pipe (27): the scope of its internal diameter ID7 is: ID7 >=(ODB+2) mm.In order to keep out the clamping force of chuck, need to ensure enough structural strengths, the scope of external diameter OD7 is: OD7 >=(ID7+10) mm.Its length L7 determines according to the position of the length of chucks and vacuum extractor, and the scope of L7 is 250 ~ 650mm.
Described location tail pipe (26): scope (Max (OD1, OD3)+3) mm ~ (ODB-4) mm of its internal diameter ID6.Its external diameter OD6 scope: (ID6+5) ~ Min (OD5, OD7).Enlarging external diameter in upper end is consistent with chuck tail pipe (27) external diameter, and enlarging external diameter in lower end is consistent with transition conduit (25) external diameter.Its length L6 is determined by the minimum allowable range of chuck and fiber drawing furnace, the scope >=150mm of L6.
A kind of manufacture method of sleeve pipe prefabricated rods of structure-improved takes following steps to realize:
One, the Making programme of mandrel component:
(1) plug 21 is made: on core rod lathe, after deposition sintering, be made into plug 21, its underpart pulled into taper, can use in testing tool precast rod refractivity detecting and analysing system (P104, PK2600) test passes after cooling.
(2) transition caudal peduncle 22 is selected: the glass stick selecting corresponding size according to the external diameter of plug 21 and length, as transition caudal peduncle 22.
(3) make dribbling caudal peduncle 23: according to glass stick high temperature sintering on glass work lathe that the size of plug 21 is selected, slowly soften, to third side to mobile one end chuck, the glass at its high temperature place is extruded formation spherical; Process further on mechanical lathe after cooling, to reach corresponding tolerance; Re-use cutting machine after machining and cut out four symmetrical ventilating grooves at spherical place, circular diameter after cutting ventilating groove consistent with dribbling caudal peduncle upper and lower part diameter (namely depth of cut equals the difference of the cross section radius of circle of bulb and dribbling caudal peduncle upper and lower part), width 1 ~ 4mm; Cutting need ensure the neat of otch, forbids to produce chipping, gap phenomenon, carries out flame polish after cutting; The processing of dribbling caudal peduncle needs control two form and position tolerances: the 1. right alignment of spheroid two ends glass stick, controls within Φ 0.2mm; 2. the circularity of spheroid, controls within Φ 0.1mm.
(4) mandrel component welding: dribbling target rod 23 bottoms are welded mutually with transition conduit 22, and transition conduit 22 lower weld has plug 22, forms mandrel component; Carry out alignment operation after having welded, require that the bow degree of its entirety must be less than 0.5mm/m(optimized scope and require to be less than 0.1mm/m).
Two, the Making programme of sleeving core rod assembly:
(1) sleeve pipe 24 is made: according to the external diameter of plug 21 and the sleeve pipe 24 of length selection corresponding size, sleeve pipe 24 bottom is drawn into taper, and excises tapered tip position, form the ventilating pit of a 2 ~ 10mm.
(2) transition conduit 25 is selected: the transition conduit selecting corresponding size according to the requirement of design.
(3) make location tail pipe 26: enlarging process is carried out on location tail pipe 26 top, is set to hydraucone shape, guarantee hydraucone external diameter and chuck tail pipe 27 external diameter consistent, the angle of enlarging 45 degree; Bottom determines whether to need to carry out enlarging process according to the external diameter of transition conduit 25, needs to ensure that external diameter is between the two consistent.
(4) chuck tail pipe 27 is selected: the chuck tail pipe selecting corresponding size according to the requirement of design.
(5) thimble assembly welding: will locate tail pipe 26 top and weld mutually with chuck tail pipe 27, bottom is welded mutually with transition conduit 25, and transition conduit 25 bottom is welded mutually with sleeve pipe 24, forms thimble assembly; Alignment operation is carried out to thimble assembly, requires that its bow degree must be less than 1mm/m(optimized scope and require to be less than 0.5mm/m).
Three, the assembling of mandrel component and thimble assembly:
Mandrel component and the timing of thimble assembly integral installation, should ensure to insert in sleeve pipe by plug in vertical direction as far as possible, avoids because plug and internal surface of sleeve pipe collide, rub and cause the scuffing of glass surface.
Now the impetus of plug is the spheroid outside of dribbling caudal peduncle (23), the spheroid of dribbling caudal peduncle (23) contacts with the inwall of enlarging caudal peduncle (26), under gravity, just can realize plug (22) autocollimating effect, namely make a kind of sleeve pipe prefabricated rods of structure-improved.
A kind of method of sleeve pipe prefabricated rods manufacture optical fiber of structure-improved is as follows:
The sleeve pipe prefabricated rods of the structure-improved after having assembled is carried out clamping by the chuck of wire-drawer-tower fix, to fiber drawing furnace (43) heat temperature raising, when temperature rises to 1800 ~ 1950 DEG C, preform cone head is slowly dropped to wire drawing fire door preheating 3 ~ 5 minutes; Determine lower excellent distance according to fiber drawing furnace hot-zone apart from fire door length, then preform cone subordinate is down to the hot-zone place of fiber drawing furnace; After 3 ~ 5 minutes, start vacuum pump until prefabricated rods heating, sleeve pipe 24 is bled operation, remove the water vapour that sleeve pipe 24 inside produces because of welding.Treat the aperture completely dissolve of prefabricated rods conehead, start wire-drawing operation, make optical fiber.
In order to avoid the water peak in drawing process increase optical fiber to greatest extent, in the drawing process after the ventilating pit of casing part tapered tip disappears, the absolute pressure of inside pipe casing need ensure lower than 50mbar.
Embodiment:
A Powder Rod VAD technique made makes a plug after oversintering, once extension and surface treatment.Calculating its cored ratio according to the refractive index profile measured is 4.53.Plug is extended again and is made into 2 plugs: the external diameter of plug A and plug B: plug A is 44.7mm, length 1500mm.Adopt OVD method to carry out outsourcing this plug, make prefabricated rods, its external diameter is 145mm.Again this prefabricated rods is carried out wire-drawing operation, be made into the G652 optical fiber of standard.
The external diameter OD1 of plug (21) B is 18.3mm, and length L1 is 1000mm; Transition caudal peduncle (22) external diameter OD3 is 18mm, and length L3 is 450mm; The rod outside diameter OD3 of dribbling caudal peduncle (23) is 20mm, and ball external diameter ODB is 32mm, and lower length is 170mm, and upper length is 390mm.
Sleeve pipe (24) uses HeraeusF300 (hydroxyl <1ppm) quartz socket tube, casing inner diameter ID4=20.5mm, external diameter OD4=60mm, length L4=1050mm; Transition conduit (25) internal diameter ID5=50mm, external diameter OD5=60mm, length L5=450mm.Location tail pipe (26) external diameter OD6=32mm, internal diameter ID6=25mm, length L6=200mm; Chuck tail pipe (27) external diameter OD7=60mm, internal diameter ID7=44mm, length L7=450mm.
1. mandrel component makes: first on glass work lathe, plug, transition caudal peduncle and dribbling caudal peduncle are distinguished alignment, make its bow degree all be less than 0.1mm/m.Then will dribble caudal peduncle, transition caudal peduncle and plug is integrally welded successively.Finally alignment is carried out to mandrel component entirety, make its bow degree within 0.1mm/m.By the mandrel component made, soak 8 hours in the hydrofluoric acid of 35%, the plug external diameter after corrosion is OD1=17.9mm.
2. thimble assembly make: enlarging process is carried out in tail pipe one end, location, is set to hydraucone shape, guarantee hydraucone external diameter and chuck tail pipe external diameter consistent, the angle of enlarging 45 degree.Flared end is welded mutually with chuck tail pipe, the other end and transition conduit integrally welded.The bottom of transition conduit is welded mutually with sleeve pipe, forms thimble assembly.Alignment operation is carried out to thimble assembly, to reach the requirement of bow degree within 0.5mm/m.Casing part heating is drawn into sharp conical shape, and excises position, Jian Zui top, the ventilating pit of a 4mm is set.Finally the thimble assembly manufactured is cleaned 1 hour in the hydrofluoric acid of 15%, then carry out drying with after pure water cleaning.
3. thimble assembly and mandrel component are assembled.In assembling process, should ensure as far as possible in the vertical direction plug to be inserted in sleeve pipe, avoid because of plug and internal surface of sleeve pipe collide, friction etc. and cause the scuffing of glass surface.Now the impetus of plug is the spheroid outside of dribbling caudal peduncle (23), the spheroid of dribbling caudal peduncle (23) contacts with the inwall of enlarging caudal peduncle (26), under gravity, plug (22) gets final product autocollimation, namely makes a kind of sleeve pipe prefabricated rods of structure-improved.
A kind of method that sleeve pipe prefabricated rods of structure-improved manufactures optical fiber is as follows: the prefabricated rods assembly after having assembled is carried out clamping by the chuck of wire-drawer-tower and fixes, first carry out preheating to fiber drawing furnace (43), treat that temperature rises to 800 DEG C, carry out baker 15min; Heat temperature raising again, treats that temperature rises to 1950 DEG C, preform cone head is slowly dropped to wire drawing fire door; Determine lower excellent distance according to fiber drawing furnace hot-zone apart from fire door length, then preform cone subordinate is down to hot-zone 44 place of fiber drawing furnace; After 3 ~ 5 minutes, start vacuum pump until prefabricated rods heating, sleeve pipe is bled operation, remove the water vapour that inside pipe casing produces because of welding.Treat the aperture completely dissolve of prefabricated rods conehead, start wire-drawing operation, make optical fiber.Within in drawing process, vacuum level requirements remains on absolute pressure 50mbar.
Tested by the optical fiber that plug A and plug B pulls out respectively, test data is shown in following Table I:
| MFD | Cutoff wavelength | Core concentricity | 1383 decay | Zero-dispersion wavelength | |
| Plug A | 9.34 | 1195 | 0.24 | 0.282 | 1321 |
| Plug B | 9.47 | 1255 | 0.15 | 0.277 | 1312 |
Table I
Relatively the optical fiber main characteristic of plug A and plug B, can find out that two plug 1383nm are substantially identical, and the core concentricity of plug B has obvious superior A rod.Prove at this point, adopt the sleeve pipe prefabricated rods of the fabrication and installation of this technique to reach the parameter of standard G652D optical fiber completely.
Claims (4)
1. a sleeve pipe prefabricated rods for structure-improved, is characterized in that: be made up of mandrel component, thimble assembly; During assembling, mandrel component is inserted in thimble assembly in vertical direction, form sleeve pipe prefabricated rods;
Mandrel component comprises plug, transition caudal peduncle and dribbling caudal peduncle; Cone is drawn in plug bottom, and top is connected with transition caudal peduncle; Transition caudal peduncle upper connecting straps ball caudal peduncle; Dribbling caudal peduncle is provided with spheroid, and its bulb cuts out ventilating groove, and the circular diameter after cutting ventilating groove is consistent with dribbling caudal peduncle upper and lower part diameter;
Thimble assembly comprises sleeve pipe, transition conduit, location tail pipe and chuck tail pipe, and casing part is drawn into taper, and excises tapered tip position, and form the ventilating pit of a 2 ~ 10mm, sleeve pipe top is connected with transition conduit; Transition conduit top is connected with location tail pipe; Enlarging process is carried out on tail pipe top, location, is set to hydraucone shape, and is connected with chuck tail pipe;
The sleeve pipe prefabricated rods of this structure-improved takes following steps to realize:
One, the Making programme of mandrel component:
(1) plug is made: on core rod lathe, after deposition sintering, be made into plug, its underpart pulled into taper, can use in testing tool precast rod refractivity detecting and analysing system test passes after cooling;
(2) transition caudal peduncle is selected: the glass stick selecting corresponding size according to the external diameter of plug and length, as transition caudal peduncle;
(3) make dribbling caudal peduncle: according to glass stick high temperature sintering on glass work lathe that the size of plug is selected, slowly soften, to third side to mobile one end chuck, the glass at its high temperature place is extruded formation spherical; Process further on mechanical lathe after cooling, to reach corresponding tolerance; Re-use cutting machine after machining and cut out four symmetrical ventilating grooves at spherical place, the circular diameter after cutting ventilating groove is consistent with top and the bottom diameter, width 1 ~ 4mm; Cutting need ensure the neat of otch, forbids to produce chipping, gap phenomenon, carries out flame polish after cutting; The processing of dribbling caudal peduncle needs control two form and position tolerances: the 1. right alignment of spheroid two ends glass stick, controls within Φ 0.2mm; 2. the circularity of spheroid, controls within Φ 0.1mm;
(4) mandrel component welding: dribbling target rod bottom is welded mutually with transition conduit, and transition conduit lower weld has plug, forms mandrel component; Carry out alignment operation after having welded, require that the bow degree of its entirety must be less than 0.5mm/m;
Two, the Making programme of thimble assembly:
(1) sleeve pipe is made: according to the external diameter of plug and the sleeve pipe of length selection corresponding size, casing part is drawn into taper, and excises tapered tip position, form the ventilating pit of a 2 ~ 10mm;
(2) transition conduit is selected: the transition conduit selecting corresponding size according to the requirement of design;
(3) make location tail pipe: enlarging process is carried out on tail pipe top, location, is set to hydraucone shape, guarantee hydraucone external diameter and chuck tail pipe external diameter consistent, the angle of enlarging 45 degree; Bottom determines whether to need to carry out enlarging process according to the external diameter of transition conduit, needs to ensure that external diameter is between the two consistent;
(4) chuck tail pipe is selected: the chuck tail pipe selecting corresponding size according to the requirement of design;
(5) thimble assembly welding: welded mutually with chuck tail pipe on tail pipe top, location, bottom is welded mutually with transition conduit, and transition conduit bottom is welded mutually with sleeve pipe, forms thimble assembly; Alignment operation is carried out to thimble assembly, requires that its bow degree must be less than 1mm/m;
Three, the assembling of mandrel component and thimble assembly:
Mandrel component and the timing of thimble assembly integral installation, should ensure to insert in sleeve pipe by plug in vertical direction as far as possible, avoids because plug and internal surface of sleeve pipe collide, rub and cause the scuffing of glass surface;
Now the impetus of plug is the spheroid outside of dribbling caudal peduncle, and the spheroid of dribbling caudal peduncle contacts with the inwall of enlarging caudal peduncle, under gravity, just can realize the autocollimating effect of plug, namely make a kind of sleeve pipe prefabricated rods of structure-improved.
2. the sleeve pipe prefabricated rods of a kind of structure-improved according to claim 1, is characterized in that: the spheroid of described dribbling caudal peduncle contacts with the inwall of enlarging caudal peduncle.
3. the sleeve pipe prefabricated rods of a kind of structure-improved according to claim 1 manufactures the method for optical fiber, it is characterized in that:
The sleeve pipe prefabricated rods of the structure-improved after having assembled is carried out clamping by the chuck of wire-drawer-tower fix, to fiber drawing furnace heat temperature raising, when temperature rises to 1850 ~ 1950 DEG C, preform cone head is slowly dropped to wire drawing fire door preheating 3 ~ 5 minutes; Determine lower excellent distance according to fiber drawing furnace hot-zone apart from fire door length, then preform cone subordinate is down to the hot-zone place of fiber drawing furnace; After 3 ~ 5 minutes, start vacuum pump until prefabricated rods heating, sleeve pipe is bled operation, remove the water vapour that inside pipe casing produces because of welding, treat the aperture completely dissolve of prefabricated rods conehead, start wire-drawing operation, make optical fiber.
4. the sleeve pipe prefabricated rods of a kind of structure-improved according to claim 3 manufactures the method for optical fiber, it is characterized in that:
In order to avoid the water peak in drawing process increase optical fiber to greatest extent, in the drawing process after the ventilating pit of casing part tapered tip disappears, the absolute pressure of inside pipe casing need ensure lower than 50mbar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410154728.XA CN103951181B (en) | 2014-04-17 | 2014-04-17 | A kind of sleeve pipe prefabricated rods of structure-improved and manufacture method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410154728.XA CN103951181B (en) | 2014-04-17 | 2014-04-17 | A kind of sleeve pipe prefabricated rods of structure-improved and manufacture method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103951181A CN103951181A (en) | 2014-07-30 |
| CN103951181B true CN103951181B (en) | 2016-03-30 |
Family
ID=51328573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410154728.XA Active CN103951181B (en) | 2014-04-17 | 2014-04-17 | A kind of sleeve pipe prefabricated rods of structure-improved and manufacture method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103951181B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016024965A1 (en) * | 2014-08-13 | 2016-02-18 | Heraeus Tenevo Llc | Quartz glass article and method for forming a quartz glass optical component |
| CN104860530B (en) * | 2015-05-27 | 2017-03-22 | 江苏亨通光纤科技有限公司 | Six-meter super-long optical fiber preform bar and manufacturing process |
| CN106746585B (en) * | 2016-12-07 | 2023-03-28 | 青海中利光纤技术有限公司 | Optical fiber perform conical head processingequipment |
| CN107082558B (en) * | 2017-04-27 | 2019-12-03 | 烽火通信科技股份有限公司 | A method of single mode optical fiber is manufactured using preform |
| CN107572772B (en) * | 2017-11-01 | 2023-06-30 | 江苏亨通光导新材料有限公司 | Fixed tube structure for optical fiber perform wire drawing |
| CN110981181B (en) * | 2019-12-19 | 2021-03-26 | 华中科技大学 | Drawing method for heterogeneous glass material optical fiber |
| CN111362571A (en) * | 2019-12-30 | 2020-07-03 | 中天科技精密材料有限公司 | Optical fiber, optical fiber preform and method of manufacturing |
| CN113716856B (en) * | 2020-05-25 | 2022-12-23 | 中天科技精密材料有限公司 | Optical fiber preform manufacturing equipment and method and optical fiber preform |
| CN112521019A (en) * | 2020-11-09 | 2021-03-19 | 武汉长盈通光电技术股份有限公司 | Preparation method of high-strength special optical fiber |
| CN112759247B (en) * | 2021-03-24 | 2022-11-25 | 浙江富通光纤技术有限公司 | Preform manufacturing process |
| CN113248131B (en) * | 2021-05-31 | 2021-09-17 | 中天科技精密材料有限公司 | Optical fiber preform, and apparatus and method for manufacturing the same |
| CN113511806B (en) * | 2021-07-02 | 2023-03-21 | 浙江富通光纤技术有限公司 | Machining method of mandrel |
| CN114409242B (en) * | 2021-12-01 | 2023-08-18 | 浙江富通光纤技术有限公司 | Process for manufacturing optical fiber preform and optical fiber |
| CN114573225A (en) * | 2022-03-16 | 2022-06-03 | 武汉烽火锐拓科技有限公司 | Regulation and control device and method for improving concentricity of core packet of VAD optical fiber preform |
| CN115286233B (en) * | 2022-07-29 | 2023-11-21 | 富通集团有限公司 | Method and equipment for processing preform |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7062942B2 (en) * | 2001-05-30 | 2006-06-20 | Pirelli & C. S.P.A. | Method of manufacturing glass optical fibre preforms and optical fibres |
| US7143611B2 (en) * | 2003-09-19 | 2006-12-05 | Fitel Usa Corp | Rod-In-Tube optical fiber preform assembly and method having reduced movement |
| CN1884165B (en) * | 2006-06-30 | 2010-04-07 | 富通集团有限公司 | Method for preparing optical fiber by large-sized low-water-peak optical fiber preform and dedicated device therefor |
| CN103030271B (en) * | 2012-12-19 | 2014-11-19 | 江苏亨通光电股份有限公司 | Method and device for producing low polarization mode dispersion optical fiber |
| CN203866199U (en) * | 2014-04-17 | 2014-10-08 | 中天科技精密材料有限公司 | Structure-modified sleeve prefabricated rod |
-
2014
- 2014-04-17 CN CN201410154728.XA patent/CN103951181B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103951181A (en) | 2014-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103951181B (en) | A kind of sleeve pipe prefabricated rods of structure-improved and manufacture method thereof | |
| CN203866199U (en) | Structure-modified sleeve prefabricated rod | |
| CN101563299B (en) | A method for producing a hollow cylinder of synthetic quartz glass, and thickwalled hollow cylinder obtained according to the method | |
| US7854146B2 (en) | Method for production of an optical component from quartz glass | |
| US8015846B2 (en) | Elongation method for producing an optical component of quartz glass and preliminary product suited for performing the method | |
| CN109748492B (en) | Preparation method of doped optical fiber outer cladding layer | |
| CN102285758B (en) | Production method for large-size optical fiber prefabricated rod | |
| KR100958270B1 (en) | Increasing the cladding-to-core ratioD/d of low D/d ratio core rods in optical fiber preforms | |
| EP3180293B1 (en) | Method for forming a quartz glass optical component and system | |
| CN105036541A (en) | Automatic centering device and method for optical fiber preform of fiber-drawing tower | |
| US20140186645A1 (en) | Manufacture of bend insensitive multimode optical fiber | |
| CN207987040U (en) | A kind of casing prefabricated rods | |
| CN113754269B (en) | Processing technology of prefabricated rod | |
| CN1938236A (en) | Method for the production of an optical component | |
| US7028508B2 (en) | Method for producing an optical fiber and optical fiber | |
| CN103570238A (en) | Glass base material elongation method | |
| US10118854B2 (en) | Tubular semifinished product for producing an optical fiber | |
| CN202968387U (en) | Novel preformed rod based on MCVD (Modified Chemical Vapor Deposition) equipment | |
| JP3489345B2 (en) | Optical fiber manufacturing method | |
| CN111362571A (en) | Optical fiber, optical fiber preform and method of manufacturing | |
| CN106371168A (en) | Method for preparing double-cladding active fiber | |
| KR101117778B1 (en) | Method for Producing Optical Fiber and Preform | |
| JP5644694B2 (en) | Optical fiber manufacturing method | |
| CN105731782A (en) | Method of forming conical shape on glass rod, and glass rod | |
| CN102898020A (en) | Prefabricated rod sleeve process flow based on modified chemical vapor deposition (MCVD) equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |