CN109928612A - A kind of manufacturing method of preform - Google Patents
A kind of manufacturing method of preform Download PDFInfo
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- CN109928612A CN109928612A CN201910298882.7A CN201910298882A CN109928612A CN 109928612 A CN109928612 A CN 109928612A CN 201910298882 A CN201910298882 A CN 201910298882A CN 109928612 A CN109928612 A CN 109928612A
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- blowtorch
- annular groove
- screw thread
- tube
- annular
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—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
- C03B37/01807—Reactant delivery systems, e.g. reactant deposition burners
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
- F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Glass Melting And Manufacturing (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
This application discloses a kind of manufacturing methods of preform, comprising the following steps: 1) in plug both ends welding auxiliary rod, auxiliary rod is mounted on chuck；2) chuck drives auxiliary rod and plug rotation, and the blowtorch work below plug is arranged in, moves back and forth along plug length direction, makes plug outside deposition loose media particle；3) operation is sintered to loose media made from step 2), finally sinters preform into；Blowtorch in the step 2) is metal blowtorch.The blowtorch of the application is metal blowtorch, and for the blowtorch of glass material, structural strength is high, can remove the silica plugs being deposited in inside blowtorch, blowtorch long service life in several ways；Blowtorch hole is by machining, and the precision in hole is high, and blowtorch combustion efficiency is more preferable.
Description
The application be on February 24th, 2017, application No. is 201710104133.7, entitled " optical fiber the applying date
The divisional application of the manufacturing method of prefabricated rods ".
Technical field
The present invention relates to preform fields, and in particular to the manufacturing method of preform.
Background technique
VAD and OVD legal system make preform by blowtorch carry out, blowtorch for spray fuel (silicon tetrachloride), can
Combustion gas body (hydrogen), combustion-supporting gas (oxygen), each gas chemically react, and generate silica dioxide granule.Existing blowtorch is equal
For glass blowtorch, it is limited by the limitation of glass material, each parts precision of blowtorch is lower, and the concentricity of blowtorch spout is poor, this meeting
Deposition quality is influenced, and spout can block blowtorch after a period of use, because glass material is frangible, can only use hydrogen fluorine
Acid is cleaned, but this cleaning way can corrode Blowtorch structure, shortens blowtorch service life.
Summary of the invention
The present invention is in view of the above-mentioned problems, propose a kind of manufacturing method of preform.
The technical solution adopted by the present invention is as follows:
A kind of manufacturing method of preform, comprising the following steps:
1) in plug both ends welding auxiliary rod, auxiliary rod is mounted on chuck；
2) chuck drives auxiliary rod and plug rotation, and the blowtorch work below plug is arranged in, past along plug length direction
It is multiple mobile, make plug outside deposition loose media particle；
3) operation is sintered to loose media made from step 2), finally sinters preform into；
Blowtorch in the step 2) is metal blowtorch, and the blowtorch includes:
Blowtorch main body, blowtorch main body successively include that centre gangway, interior combustion-supporting gas channel and fuel gas are logical from inside to outside
Road, one end of blowtorch main body are spout end, and the other end is installation end, and blowtorch main body installation end lateral wall is equipped with external screw thread；Institute
State centre gangway include the circular groove that installation end is set and one setting spout end and with the circular groove
The centre bore of connection, the internal diameter of the centre bore are less than the internal diameter of circular groove, have internal screw thread in the circular groove；It is described
Interior combustion-supporting gas channel includes the first annular groove for being arranged in installation end and multiple settings at spout end and with first
First venthole of annular groove connection, each first venthole are evenly arranged around the axis of centre bore, the first annular groove
Two side walls all have internal screw thread；The fuel gas channel includes the second annular groove that installation end is arranged in, with
And multiple the second ventholes that spout end is set and is connected to second annular groove, axis of each second venthole around centre bore
It is evenly arranged, the two side walls of the second annular groove all have internal screw thread；The first annular groove is located at the second annular
On the inside of groove, the circular groove is located on the inside of first annular groove；
Mesotube and separation gas pipe, mesotube inner sleeve is and relatively fixed with separation gas pipe on separation gas pipe, every
It include open end and closed end from flue, the lateral wall at separation gas tube opening end has external screw thread, separation gas duct occlusion
End has across hole, and separation gas pipe is fixed by the screw-internal thread fit of external screw thread and circular groove, the outer diameter of the mesotube
Less than the internal diameter of centre bore, the centre bore is protruded into behind the open end of separation gas pipe in one end of the mesotube, center
The other end of pipe passes through hole described in passing through, and the corresponding lateral wall of mesotube cooperates with via seal is worn；
One of end face of interior combustion tube, interior combustion tube has first annular slot, interior combustion tube and first annular slot slot
Screw thread is equipped on the corresponding outboard sidewalls of mouth, interior combustion tube passes through the two side walls screw thread of screw thread and the first annular groove
Connection；
One of end face of combustible tube, combustible tube has the second annular groove, and combustible tube is corresponding with the second annular groove notch
Outboard sidewalls on be equipped with screw thread, combustible tube is threadedly coupled by screw thread with the two side walls of the second annular groove；
Outer combustion tube, the outer one of end face of combustion tube have third annular groove, outer combustion tube and third annular groove notch
Screw thread is equipped on corresponding outboard sidewalls, the inner sidewall of outer combustion tube is matched by the external screw thread of screw thread and blowtorch main body lateral wall
Conjunction is attached；
Outer cover, outer cover inner sidewall one end have internal screw thread, and outer cover passes through the lateral wall spiral shell of internal screw thread and the outer combustion tube
Line connection, the space between outer cover and blowtorch main body lateral wall constitute outer combustion-supporting gas channel.
The blowtorch of the application is metal blowtorch, and for the blowtorch of glass material, structural strength is high, can be by more
Kind mode removes the silica plugs being deposited in inside blowtorch, blowtorch long service life；The centre bore of blowtorch, the first outlet
Hole and the second venthole pass through machining, the precision height in hole, and blowtorch combustion efficiency is more preferable；It is separation gas pipe, interior combustion-supporting
Pipe, combustible tube, outer combustion tube and outer cover are connected through a screw thread, and this connection type is reliable, and dismounting is also more convenient, when some portion
When part damages, it is only necessary to which the component for replacing damage can just be such that blowtorch works normally, and blowtorch maintenance cost is low.
The mesotube inner space of the application blowtorch is used for transmission fuel and fuel gas, between centre bore and mesotube
Space is inert gas channel, and inert gas passes through logical into inert gas behind the space between separation gas pipe and mesotube
Road；Interior combustion-supporting pipe enters the first venthole for being passed through oxygen, and by first annular slot notch；Combustible tube is flammable for being passed through
Gas, and the second venthole is entered by the second annular groove notch；Outer combustion tube passes through third annular groove for being passed through oxygen
Notch enters outer combustion-supporting gas channel.
Optionally, the lateral wall of side where the blowtorch main body spout end is cone cell lateral wall, and spout end is miner diameter end；
The outer cover has cone cell inner sidewall compatible with the cone cell lateral wall.
The cooperation of cone cell lateral wall and cone cell inner sidewall can make outer combustion-supporting gas channel gas outlet to blowtorch body central
Gather.By selecting the blowtorch ontology and outer cover of correct tilt angle (angles of tapering portions), outer combustion-supporting gas can be led to
The focus point of road gas outlet is fixed on suitable position, flame temperature can be made to reach optimum value, sufficiently improves the temperature of combustion flame
Degree and the degree of aggregation for generating dust particles increase adsorption rate of the dust particles in preform target rod.
Optionally, the outboard sidewalls of the combustible tube and interior combustion tube adjacent to the side of blowtorch main body installation end all have limit
Limit is realized in position ring, the stop collar and installation end cooperation；The outer combustion tube is in the side of blowtorch main body installation end
Lateral wall all has stop collar, and limit, outer combustion tube outside are realized in the stop collar at outer combustion tube inner sidewall and installation end cooperation
Stop collar and the cooperation of outer cover end at wall realize limit.
Optionally, the material of the blowtorch is stainless steel, such as 361 stainless steels.
Optionally, the separation gas pipe, interior combustion tube, combustible tube and outer combustion tube have far from the side of blowtorch ontology
Air inlet pipe, the space of the air inlet pipe are connected to the inner space of respective tube.Air inlet pipe to corresponding pipe for being passed through accordingly
Raw material.
Optionally, the first annular slot of the interior combustion tube has multiple support columns, the branch adjacent to the part of installation end
Dagger is for connecting the corresponding two side walls of first annular slot；Second annular groove of the combustible tube is adjacent to the part of installation end
With multiple support columns, the support column is for connecting the corresponding two side walls of the second annular groove；The of the outer combustion tube
Three annular grooves have multiple support columns adjacent to the part of installation end, and the support column is for connecting third annular groove corresponding two
A side wall.Setting support column can prevent each annular groove from deforming.
Optionally, the two side walls of first annular slot have two annular recess being oppositely arranged, first annular groove
Two annular recess form cushion chamber.
The design of cushion chamber can make exit so that being subjected to expansion and compression process to the gas of blowtorch bulk transport
More evenly, blowtorch is more stable when burning for velocity flow profile.
Optionally, the two side walls of the second annular groove have two annular recess being oppositely arranged, second annular groove
Two annular recess form cushion chamber.
Optionally, the two side walls of third annular groove have two annular recess being oppositely arranged, third annular groove
Two annular recess form cushion chamber.
Optionally, there is support column, the support column is for connecting corresponding two annular recess in cushion chamber.
The beneficial effects of the present invention are: the blowtorch of the application is metal blowtorch, and for the blowtorch of glass material, knot
Structure intensity is high, can remove the silica plugs being deposited in inside blowtorch, blowtorch long service life in several ways；Spray
The centre bore of lamp, the first venthole and the second venthole pass through machining, and the precision in hole is high, and blowtorch combustion efficiency is more
It is good；Separation gas pipe, interior combustion tube, combustible tube, outer combustion tube and outer cover are connected through a screw thread, and this connection type is reliable, and
Dismounting is also more convenient, when some parts damages, it is only necessary to which the component for replacing damage can just be such that blowtorch works normally, blowtorch dimension
It protects at low cost.
Detailed description of the invention:
Fig. 1 is the cross-sectional view of blowtorch of the present invention；
Fig. 2 is the top view of blowtorch of the present invention；
Fig. 3 is the cross-sectional view of blowtorch main body and outer cover；
Fig. 4 is the cross-sectional view of blowtorch main body；
Fig. 5 is outer combustion tube structural schematic diagram；
Fig. 6 is combustible tube structural schematic diagram；
Fig. 7 is interior combustion tube structural schematic diagram；
Fig. 8 is the perspective view of the outer combustion tube of embodiment 2；
Fig. 9 is the cross-sectional view of the outer combustion tube of embodiment 2.
Each appended drawing reference in figure are as follows:
1, blowtorch main body；2, outer cover；3, separation gas pipe；4, mesotube；5, interior combustion tube；6, combustible tube；7, outer combustion-supporting
Pipe；8, spout end；9, installation end；10, centre bore；11, circular groove；12, the first venthole；13, the second venthole；14,
One annular groove；15, second annular groove；16, cone cell lateral wall；17, cone cell inner sidewall；18, outer combustion-supporting gas channel；19,
Stop collar；20, support column；21, first annular slot；22, the second annular groove；23, third annular groove；24, air inlet pipe；25, it passes through
Hole；26, annular recess；27, cushion chamber.
Specific embodiment:
Below with reference to each attached drawing, the present invention will be described in detail.
Embodiment 1
A kind of manufacturing method of preform, comprising the following steps:
1) in plug both ends welding auxiliary rod, auxiliary rod is mounted on chuck；
2) chuck drives auxiliary rod and plug rotation, and the blowtorch work below plug is arranged in, past along plug length direction
It is multiple mobile, make plug outside deposition loose media particle；
3) operation is sintered to loose media made from step 2), finally sinters preform into；
Blowtorch in step 2) is metal blowtorch, and as shown in Fig. 1~7, blowtorch includes:
Blowtorch main body 1, blowtorch main body 1 successively include centre gangway, interior combustion-supporting gas channel and fuel gas from inside to outside
Channel, one end of blowtorch main body 1 are spout end 8, and the other end is installation end 9, and 9 lateral wall of blowtorch main body installation end is equipped with outer spiral shell
Line；Centre gangway include the circular groove 11 that installation end 9 is set and one setting spout end 8 and with circle it is recessed
The centre bore 10 that slot 11 is connected to, the internal diameter of centre bore 10 are less than the internal diameter of circular groove 11, have internal screw thread in circular groove 11；
Interior combustion-supporting gas channel include the first annular groove 14 that installation end 9 is set and multiple settings spout end 8 and with
The first venthole 12 that first annular groove 14 is connected to, each first venthole 12 are evenly arranged around the axis of centre bore 10, and first
The two side walls of annular groove 14 all have internal screw thread；Fuel gas channel includes second annular that installation end 9 is arranged in
Groove 15 and multiple the second ventholes 13 that spout end 8 is set and is connected to second annular groove 15, each second venthole
13 are evenly arranged around the axis of centre bore 10, and the two side walls of second annular groove 15 all have internal screw thread；First annular groove
14 are located at 15 inside of second annular groove, and circular groove 11 is located at 14 inside of first annular groove；
Mesotube 4 and separation gas pipe 3,4 inner sleeve of mesotube are and relatively solid with separation gas pipe 3 on separation gas pipe 3
Fixed, separation gas pipe 3 includes open end and closed end, and the lateral wall of 3 open end of separation gas pipe has external screw thread, separation gas
3 closed end of pipe has across hole 25, and separation gas pipe 3 is fixed by the screw-internal thread fit of external screw thread and circular groove 11, center
The outer diameter of pipe 4 is less than the internal diameter of centre bore 10, and centre bore is protruded into behind the open end of separation gas pipe 3 in one end of mesotube 4
10, the other end of mesotube 4 is passed through across hole 25, and the corresponding lateral wall of mesotube 4 cooperates with the sealing of hole 25 is passed through；
Interior combustion tube 5, one of end face of interior combustion tube 5 have a first annular slot 21, interior combustion tube 5 with it is first annular
Screw thread is equipped on the corresponding outboard sidewalls of 21 notch of slot, interior combustion tube 5 passes through two sides of screw thread and first annular groove 14
Wall is threadedly coupled；
One of end face of combustible tube 6, combustible tube 6 has the second annular groove 22,22 slot of combustible tube 6 and the second annular groove
Screw thread is equipped on the corresponding outboard sidewalls of mouth, combustible tube 6 is connected by screw thread and the two side walls screw thread of second annular groove 15
It connects；
Outer combustion tube 7, the one of end face of outer combustion tube 7 have third annular groove 23, outer combustion tube 7 and third annular groove
Screw thread is equipped on the corresponding outboard sidewalls of 23 notches, the inner sidewall of outer combustion tube 7 passes through screw thread and 1 lateral wall of blowtorch main body
External screw thread cooperation is attached；
Outer cover 2,2 inner sidewall one end of outer cover have internal screw thread, and outer cover 2 passes through the lateral wall spiral shell of internal screw thread and outer combustion tube 7
Line connects, and the space between 1 lateral wall of outer cover 2 and blowtorch main body constitutes outer combustion-supporting gas channel 18.
The blowtorch of the application is metal blowtorch, and for the blowtorch of glass material, structural strength is high, can be by more
Kind mode removes the silica plugs being deposited in inside blowtorch, blowtorch long service life；The centre bore 10 of blowtorch, first go out
Stomata 12 and the second venthole 13 are by machining, and the precision in hole is high, and blowtorch combustion efficiency is more preferable；Separation gas pipe 3,
Interior combustion tube 5, combustible tube 6, outer combustion tube 7 and outer cover 2 are connected through a screw thread, and this connection type is reliable, and are dismounted also more square
Just, when some parts damages, it is only necessary to which the component for replacing damage can just be such that blowtorch works normally, and blowtorch maintenance cost is low.
4 inner space of mesotube of the application blowtorch is used for transmission fuel and fuel gas, centre bore 10 and mesotube 4 it
Between space be inert gas channel, inert gas is by entering indifferent gas behind space between separation gas pipe 3 and mesotube 4
Body channel；Interior combustion tube 5 enters the first venthole 12 for being passed through oxygen, and by first annular 21 notch of slot；Combustible tube 6 is used
In being passed through fuel gas, and the second venthole 13 is entered by 22 notch of the second annular groove；Outer combustion tube 7 is used to be passed through oxygen,
And outer combustion-supporting gas channel 18 is entered by 23 notch of third annular groove.
As shown in figure 3, in this present embodiment, the lateral wall of 8 place side of blowtorch main body spout end is cone cell lateral wall 16, and
Spout end 8 is miner diameter end；Outer cover 2 has cone cell inner sidewall 17 compatible with cone cell lateral wall 16.
The cooperation of cone cell lateral wall 16 and cone cell inner sidewall 17 can make outer 18 gas outlet of combustion-supporting gas channel to blowtorch sheet
Gather at body center.It, can will be outer combustion-supporting by selecting the blowtorch ontology and outer cover 2 of correct tilt angle (angles of tapering portions)
18 gas outlet focus point of gas passage is fixed on suitable position, flame temperature can be made to reach optimum value, sufficiently improves burning fire
The temperature of flame and the degree of aggregation for generating dust particles increase adsorption rate of the dust particles in preform target rod.
In this present embodiment such as Fig. 1,5,6 and 7, combustible tube 6 and interior combustion tube 5 are adjacent to the side of blowtorch main body installation end 9
Outboard sidewalls all have stop collar 19, limit is realized in stop collar 19 and the cooperation of installation end 9；Outer combustion tube 7 is adjacent to blowtorch main body
The outboard sidewalls of the side of installation end 9 all have stop collar 19, and the stop collar 19 at outer 7 inner sidewall of combustion tube is matched with installation end 9
It closes and realizes limit, the stop collar 19 and the cooperation of 2 end of outer cover at outer 7 lateral wall of combustion tube realize limit.
In this present embodiment, the material of blowtorch is stainless steel, such as 361 stainless steels.
As shown in Figure 1, in this present embodiment, separation gas pipe 3, interior combustion tube 5, combustible tube 6 and outer combustion tube 7 are far from spray
The side of lamp ontology has air inlet pipe 24, and the space of air inlet pipe 24 is connected to the inner space of respective tube.Air inlet pipe 24 be used for
Corresponding pipe is passed through corresponding raw material.
As shown in Figure 1, in this present embodiment, the first annular slot 21 of interior combustion tube 5 has more adjacent to the part of installation end 9
A support column 20, support column 20 is for connecting the corresponding two side walls of first annular slot 21；Second annular groove 22 of combustible tube 6
The part of neighbouring installation end 9 has multiple support columns 20, and support column 20 is for connecting corresponding two sides of the second annular groove 22
Wall；The third annular groove 23 of outer combustion tube 7 has multiple support columns 20 adjacent to the part of installation end 9, and support column 20 is for connecting
The corresponding two side walls of third annular groove 23.Setting support column 20 can prevent annular groove from deforming.
Embodiment 2
As shown in FIG. 8 and 9, the present embodiment the difference from embodiment 1 is that, two of the third annular groove 23 of outer combustion tube
Side wall has two annular recess 26 being oppositely arranged, and two annular recess 26 of third annular groove form cushion chamber 27.It is slow
The design of chamber 27 is rushed, so that being subjected to expansion and compression process to the gas of blowtorch bulk transport, exit velocity flow profile can be made
More evenly, it is more stable when blowtorch burns.
In this present embodiment, there is support column 20, support column 20 is for connecting corresponding two annulars in cushion chamber 27
Recess portion 26.
When practice, the two side walls of first annular slot 21 also can have two annular recess 26 being oppositely arranged,
Two annular recess 26 of first annular groove 14 form cushion chamber 27.
When practice, the two side walls of the second annular groove 22 also have two annular recess 26 being oppositely arranged, and second
Two annular recess 26 of annular groove 15 form cushion chamber 27.
The above description is only a preferred embodiment of the present invention, not thereby limits scope of patent protection of the invention, all
It is directly or indirectly to be used in other relevant technologies with equivalent structure transformation made by description of the invention and accompanying drawing content
Field similarly includes within the scope of the present invention.
Claims (10)
1. a kind of manufacturing method of preform, comprising the following steps:
1) in plug both ends welding auxiliary rod, auxiliary rod is mounted on chuck；
2) chuck drives auxiliary rod and plug rotation, and the blowtorch work below plug is arranged in, back and forth moves along plug length direction
It is dynamic, make plug outside deposition loose media particle；
3) operation is sintered to loose media made from step 2), finally sinters preform into；
It is characterized in that, the blowtorch in the step 2) is metal blowtorch, the blowtorch includes:
Blowtorch main body, blowtorch main body successively include centre gangway, interior combustion-supporting gas channel and fuel gas channel, spray from inside to outside
One end of lamp main body is spout end, and the other end is installation end, and blowtorch main body installation end lateral wall is equipped with external screw thread；The center
Channel includes that the circular groove that installation end is arranged in and one are arranged in spout end and are connected to the circular groove
Centre bore, the internal diameter of the centre bore are less than the internal diameter of circular groove, have internal screw thread in the circular groove；It is described interior combustion-supporting
Gas passage include the first annular groove that installation end is set and multiple settings spout end and with it is first annular recessed
First venthole of slot connection, each first venthole are evenly arranged around the axis of centre bore, and two of the first annular groove
Side wall all has internal screw thread；The fuel gas channel includes the second annular groove for being arranged in installation end and multiple
The second venthole that spout end is set and is connected to second annular groove, axis uniform cloth of each second venthole around centre bore
It sets, the two side walls of the second annular groove all have internal screw thread；The first annular groove is located in second annular groove
Side, the circular groove are located on the inside of first annular groove；
Mesotube and separation gas pipe, mesotube inner sleeve is on separation gas pipe, and, isolation gas relatively fixed with separation gas pipe
Body pipe includes open end and closed end, and the lateral wall at separation gas tube opening end has external screw thread, separation gas duct occlusion end tool
Have across hole, separation gas pipe is fixed by the screw-internal thread fit of external screw thread and circular groove, and the outer diameter of the mesotube is less than
The centre bore is protruded into behind the open end of separation gas pipe in one end of the internal diameter of centre bore, the mesotube, mesotube
The other end passes through hole described in passing through, and the corresponding lateral wall of mesotube cooperates with via seal is worn；
One of end face of interior combustion tube, interior combustion tube has first annular slot, interior combustion tube and first annular slot notch pair
Screw thread is equipped on the outboard sidewalls answered, interior combustion tube is connected by screw thread and the two side walls screw thread of the first annular groove
It connects；
Combustible tube, one of end face of combustible tube have the second annular groove, and combustible tube is corresponding with the second annular groove notch interior
Screw thread is equipped on lateral wall, combustible tube is threadedly coupled by screw thread with the two side walls of the second annular groove；
Outer combustion tube, the outer one of end face of combustion tube have third annular groove, and outer combustion tube is corresponding with third annular groove notch
Outboard sidewalls on be equipped with screw thread, the inner sidewall of outer combustion tube by the external screw thread of screw thread and blowtorch main body lateral wall cooperate into
Row connection；
Outer cover, outer cover inner sidewall one end have internal screw thread, and outer cover is connected by the lateral wall screw thread of internal screw thread and the outer combustion tube
It connects, the space between outer cover and blowtorch main body lateral wall constitutes outer combustion-supporting gas channel.
2. the manufacturing method of preform as described in claim 1, which is characterized in where the blowtorch main body spout end
The lateral wall of side is cone cell lateral wall, and spout end is miner diameter end；The outer cover has compatible with the cone cell lateral wall
Cone cell inner sidewall.
3. the manufacturing method of preform as described in claim 1, which is characterized in that the combustible tube and interior combustion tube are adjacent
The outboard sidewalls of the side of nearly blowtorch main body installation end all have stop collar, and limit is realized in the stop collar and installation end cooperation；
Outboard sidewalls of the outer combustion tube adjacent to the side of blowtorch main body installation end all have stop collar, at outer combustion tube inner sidewall
Limit is realized in stop collar and installation end cooperation, and the stop collar and the cooperation of outer cover end at outer combustion tube lateral wall realize limit.
4. the manufacturing method of preform as described in claim 1, which is characterized in that the material of the blowtorch is stainless
Steel.
5. the manufacturing method of preform as described in claim 1, which is characterized in that the separation gas pipe, interior combustion-supporting
Pipe, combustible tube and outer combustion tube have an air inlet pipe far from the side of blowtorch ontology, the space of the air inlet pipe and respective tube it is interior
The connection of portion space.
6. the manufacturing method of preform as described in claim 1, which is characterized in that the interior combustion tube it is first annular
Slot has multiple support columns adjacent to the part of installation end, and the support column is for connecting corresponding two sides of first annular slot
Wall；Second annular groove of the combustible tube has multiple support columns adjacent to the part of installation end, and the support column is for connecting the
The corresponding two side walls of second ring slot；The third annular groove of the outer combustion tube has multiple supports adjacent to the part of installation end
Column, the support column is for connecting the corresponding two side walls of third annular groove.
7. the manufacturing method of preform as described in claim 1, which is characterized in that the two side walls of first annular slot have
There are two annular recess being oppositely arranged, two annular recess of first annular groove form cushion chamber.
8. the manufacturing method of preform as described in claim 1, which is characterized in that the two side walls of the second annular groove have
There are two annular recess being oppositely arranged, two annular recess of second annular groove form cushion chamber.
9. the manufacturing method of preform as described in claim 1, which is characterized in that the two side walls of third annular groove have
There are two annular recess being oppositely arranged, two annular recess of third annular groove form cushion chamber.
10. the manufacturing method of the preform as described in claim 7,8 or 9, which is characterized in that have support in cushion chamber
Column, the support column is for connecting corresponding two annular recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN113248133A (en) * | 2021-05-31 | 2021-08-13 | 中天科技精密材料有限公司 | Optical fiber preform manufacturing equipment and manufacturing method of optical fiber preform using same |
| CN113480162A (en) * | 2019-07-29 | 2021-10-08 | 富通集团有限公司 | Prefabricated excellent processing equipment |
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| CN110606657B (en) * | 2018-06-15 | 2020-10-16 | 华中科技大学 | Large-core-diameter rare earth doped optical fiber preform and preparation method thereof |
| CN108996901B (en) * | 2018-08-08 | 2021-11-02 | 杭州富通通信技术股份有限公司 | Method for manufacturing optical fiber |
| CN110372200A (en) * | 2019-08-12 | 2019-10-25 | 杭州永特信息技术有限公司 | A kind of detachable blowtorch preparing preform for VAD method |
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| CN113354274B (en) * | 2021-06-29 | 2022-08-30 | 杭州富通通信技术股份有限公司 | Method for processing prefabricated rod |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106904822B (en) | 2019-05-24 |
| CN109912192A (en) | 2019-06-21 |
| CN109912192B (en) | 2021-08-06 |
| CN109928612B (en) | 2021-08-06 |
| CN106904822A (en) | 2017-06-30 |
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