CN115072983B - Preparation method of hollow anti-resonance optical fiber intermediate preform - Google Patents
Preparation method of hollow anti-resonance optical fiber intermediate preform Download PDFInfo
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- CN115072983B CN115072983B CN202210654526.6A CN202210654526A CN115072983B CN 115072983 B CN115072983 B CN 115072983B CN 202210654526 A CN202210654526 A CN 202210654526A CN 115072983 B CN115072983 B CN 115072983B
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 claims description 48
- 210000000078 claw Anatomy 0.000 claims description 24
- 230000000712 assembly Effects 0.000 claims description 16
- 238000000429 assembly Methods 0.000 claims description 16
- 208000010727 head pressing Diseases 0.000 claims description 6
- 238000003466 welding Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 description 7
- 239000000835 fiber Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000005253 cladding Methods 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 6
- 239000000945 filler Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005491 wire drawing Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012681 fiber drawing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009022 nonlinear effect Effects 0.000 description 1
- 230000008832 photodamage Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000036544 posture Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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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
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01211—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/10—Internal structure or shape details
- C03B2203/14—Non-solid, i.e. hollow products, e.g. hollow clad or with core-clad interface
- C03B2203/16—Hollow core
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
The application provides a preparation method of a hollow anti-resonance optical fiber intermediate preform, which comprises the steps of drawing each first hollow pipe, each second hollow pipe, each central supporting pipe and each filling rod; the outer sleeve is horizontally placed, the first hollow pipe, the second hollow pipe, the central supporting pipe and the filling rods are placed in the outer sleeve, the second hollow pipe and the first filling rods are alternately arranged along the circumferential direction of the outer wall of the central supporting pipe, the first hollow pipe is clung to the inner wall of the outer sleeve, the second hollow pipe is clung to the inner wall of one side of the first hollow pipe far away from the center of the outer sleeve, and the problems of poor longitudinal uniformity and poor structural consistency when the hollow anti-resonance optical fiber perform is prepared by welding are solved.
Description
Technical Field
The invention relates to the field of optical fiber manufacturing, in particular to a preparation method of a hollow anti-resonance optical fiber intermediate preform.
Background
The intrinsic defects of the fiber core quartz matrix material of the widely used solid fiber at present, such as nonlinearity, chromatic dispersion, photodamage, ultraviolet middle infrared light-blocking and the like, limit the application of the solid fiber in the fields of communication data transmission, high-power short-pulse laser transmission, ultraviolet, middle infrared, terahertz, microwave transmission and the like. Hollow core optical fibers are an important research direction for micro-structured optical fibers, and are expected to break through the bottleneck of traditional optical fibers due to extremely small nonlinearity, low modal dispersion, high damage threshold, wide transmission band and near-light transmission speed.
The hollow anti-resonance optical fiber is a novel hollow optical fiber with potential application, a quartz capillary structural layer surrounding the air fiber core around an optical fiber structure is the most core part, the structure can enable light with specific wavelength to resonate outside a cladding, light which does not meet resonance conditions is reflected back to the air fiber core, light energy is limited into the fiber core through an anti-resonance reflection principle and inhibition mode coupling, and most of light energy (more than 99 percent) in the optical fiber is transmitted in the air fiber core, so that the light transmission is little affected by absorption of optical fiber materials, nonlinear effect and delay are low, the damage threshold is high, the advantage is obvious in high-power and pulse laser flexible transmission, and the optical fiber can be used as a high-efficiency platform for interaction of light and substances, and plays an important role in the fields of sensing and the like.
The preparation method of the hollow anti-resonance optical fiber mainly comprises the steps of manufacturing an intermediate, drawing a prefabricated rod and the like, wherein the manufacturing of the intermediate is a key process for guaranteeing the structure and performance of the optical fiber, the researches disclosed in the prior art mainly comprise the researches on the structural design, theoretical simulation or optical fiber application of the hollow anti-resonance optical fiber, the researches on the preparation process of the hollow anti-resonance optical fiber, particularly the preparation process of the intermediate, are rarely reported, the hollow anti-resonance optical fiber structure is generally a circular cladding, a plurality of capillaries with the same size are hung on the inner wall of the cladding, and each capillary is not contacted with each other and is evenly distributed on the inner wall of the cladding. The preparation of the hollow anti-resonance optical fiber intermediate is mainly based on a welding method, and the method has the advantages that a capillary is directly welded to the inner wall surface of a cladding sleeve through an external heat source to form an initial preform without using a die, and then the preform is drawn into the intermediate. However, this method has certain drawbacks such as:
(1) When the capillaries are welded on the inner wall of the cladding sleeve, the welding area of each capillary is different from that of the sleeve due to the non-uniformity of the heat source, and the welding point is increased along with the increase of the length of the sleeve, so that the non-uniformity of the preform rod is further increased, and the longitudinal uniformity of the drawn intermediate structure is seriously influenced;
(2) The positioning precision is difficult to ensure in the welding process, and the physical deviation between capillaries can be amplified in the process of drawing an intermediate body, so that the structural consistency of the optical fiber is affected;
(3) The requirements for external conditions are high and it is necessary to provide a stable heat source or other direct means of action.
Therefore, there is a need for a hollow anti-resonant optical fiber preform structure that overcomes the shortcomings of the capillary bonding process.
Disclosure of Invention
The invention provides a preparation method of a hollow anti-resonance optical fiber intermediate preform, which solves the problems of poor longitudinal uniformity and poor structural consistency when the hollow anti-resonance optical fiber preform is prepared by welding.
In order to solve the technical problems, the invention adopts the following technical scheme: a preparation method of a hollow anti-resonance optical fiber intermediate preform,
drawing each first hollow tube, each second hollow tube, each central supporting tube and each filling rod;
the outer sleeve is horizontally placed, a first hollow pipe, a second hollow pipe, a central supporting pipe and filling rods are placed in the outer sleeve, the second hollow pipe and the first filling rods are alternately arranged along the circumferential direction of the outer wall of the central supporting pipe, the first hollow pipe is clung to the inner wall of the outer sleeve, and the second hollow pipe is clung to the inner wall of one side of the first hollow pipe far away from the center of the outer sleeve.
In a preferred embodiment, the method comprises a first filling method:
placing the first hollow tube horizontally;
the second hollow tube is attached to the inner wall of the first hollow tube;
filling each filling rod into a space between the inner wall of the first hollow tube and the outer wall of the second hollow tube to form a combination body;
the outer sleeve is horizontally placed;
the combination body is stuck on the inner wall of the outer sleeve, so that the centers of the outer sleeve, the first hollow pipe and the second hollow pipe are in a straight line, and the second hollow pipe is arranged on one side far from the center of the outer sleeve;
the first filling rods and other assemblies are alternately placed on two sides of the assembly, the central supporting tube is placed at the same time, the concentric arrangement of the central supporting tube and the outer sleeve is ensured, and the position of the second hollow tube is adjusted at the same time, so that the outer sleeve, the centers of the first hollow tube and the second hollow tube are in a straight line, and the second hollow tube is arranged on one side far away from the center of the outer sleeve.
In a preferred embodiment, the method comprises a second filling method:
placing the outer sleeve horizontally;
a plurality of first hollow tubes are arranged in the outer sleeve;
placing a second hollow tube in each first hollow tube;
positioning the first hollow pipes and the second hollow pipes so that the centers of the outer sleeve, the first hollow pipes and the second hollow pipes are in a straight line, and the second hollow pipes are arranged on one side far from the center of the outer sleeve;
and filling the gaps between the outer sleeve and the second hollow tube with filling rods.
In the preferred scheme, the hollow tube positioning device is further included, the hollow tube positioning device comprises a plurality of positioning claw assemblies which are circumferentially arranged, the positioning claw assemblies are telescopic, each positioning claw assembly comprises a plurality of picking needles, and the picking needles are tightly attached to the inner wall of the first hollow tube or the second hollow tube and are used for positioning the position of the first hollow tube or the second hollow tube.
In the preferred scheme, the positioning claw assembly comprises an end block, a plurality of rotating blocks are arranged on the end block along the circumferential direction, the rotating blocks are provided with eccentrically arranged picking needles, the middle part of the end block is provided with rotatable large-head pressing nails, and the end parts of the large-head pressing nails press all the rotating blocks.
In the preferred scheme, the hollow tube positioning device comprises a plurality of vane plates capable of gathering towards the center, a guide sleeve is arranged on each vane plate, a guide rod is arranged at one end of the end block, and the guide rod is in sliding sleeve joint with the guide sleeve.
In the preferred scheme, hollow tube positioner still includes rolling disc and big fluted disc, and rolling disc and big fluted disc coaxial rotation are equipped with a plurality of pulling pieces along circumference, and pulling piece both ends are articulated with lamina and big fluted disc respectively.
In the preferred scheme, still include the fixed disk, fixed disk and rolling disc rotate to be connected, and the fixed disk is equipped with a plurality of straight slots along circumference, and straight slot length direction is along fixed disk radial arrangement, and the guide pin bushing card slides in the straight slot.
In the preferred scheme, still be equipped with the base, fixed disk and base fixed connection are equipped with rotatable first pinion on the fixed disk, and first pinion one side is equipped with rotatable second pinion and worm wheel, and first pinion and second pinion meshing rotate, and second pinion and worm wheel axis are connected, are equipped with rotatable worm on the base, and worm wheel meshing rotate.
In the preferred scheme, one end of the worm is provided with a hand wheel or a motor.
The beneficial effects of the invention are as follows: the gap is filled between the hollow tubes on the inner wall of the outer sleeve by arranging the spacing elements, and the two ends form a stable supporting structure, so that the uniformity and the stability between the tubes are ensured; the positioning is realized through the mutual support between the hollow tube and the filling rod, the process is simple, and the cost is low; when the optical fiber is heated by the optical fiber drawing tower in the drawing process of the optical fiber, the first hollow pipe and the second hollow pipe can be naturally and uniformly welded to the inner wall of the outer sleeve without being welded in advance; the hollow tube positioning device is adopted to guide the positions of the hollow tubes, so that the positions of the hollow tubes can be quickly and once aligned.
Drawings
The invention is further described below with reference to the drawings and examples.
FIG. 1 is a schematic front view of a preform according to the present invention.
FIG. 2 is a schematic end view of a preform according to the present invention.
FIG. 3 is a middle cross-sectional view of a preform according to the present invention.
FIG. 4 is a cross-sectional view of a preform with an odd number of hollow tubes.
Fig. 5 is a schematic representation of an implementation of the present invention.
FIG. 6 is a schematic view of a hollow tube positioning device of the present invention.
FIG. 7 is an exploded view of the hollow tube positioning device of the present invention.
Fig. 8 is a front view of the hollow tube positioning device of the present invention.
Fig. 9 is a schematic view of vane plate retraction.
Fig. 10 is a partial view of a rotating disk snap connection.
FIG. 11 is a schematic view of the sliding structure of the positioning pawl assembly of the present invention.
Fig. 12 is a schematic view of a positioning pawl assembly of the present invention.
Fig. 13 is a schematic view of positioning jaw expansion.
Fig. 14 is a cross-sectional view of the positioning pawl of the present invention.
In the figure: an outer sleeve 1; a first hollow tube 101; a second hollow tube 102; a central support tube 103; a first filler rod 104; a second filler rod 105; a third filler rod 106; a fourth filler rod 107; a fifth filler rod 108; filling the support structure 2; a preform carrier 3; a hollow tube positioning device 4; a fixed plate 401; rotating the disc 402; a large fluted disc 403; a pull tab 404; a vane plate 405; straight slot 406; a first rotation post 407; an arc-shaped groove 408; a second swivel post 409; a bayonet 410; a ring groove 411; a positioning claw assembly 5; a picking needle 501; a turning block 502; a rotation shaft 503; tack 504; a disc spring 505; a stop 506; a plug 507; an end block 508; guide bar 509; a guide sleeve 510; a locking knob 511; a first pinion 6; a second pinion 7; a worm wheel 8; a worm 9; a hand wheel 10; a base 11.
Detailed Description
As shown in fig. 1-14, a method for preparing a hollow anti-resonance optical fiber intermediate preform,
drawing each first hollow tube 101, each second hollow tube 102, each central supporting tube 103 and each filling rod, wherein the diameter of each first hollow tube 101 is larger than that of each second hollow tube 102, but the diameters of the first hollow tubes are the same;
the outer sleeve 1 is horizontally placed, a first hollow pipe 101, a second hollow pipe 102, a central supporting pipe 103 and filling rods are placed in the outer sleeve 1, the second hollow pipe 102 and the first filling rods 104 are alternately arranged along the circumferential direction of the outer wall of the central supporting pipe 103, the first hollow pipe 101 is clung to the inner wall of the outer sleeve 1, and the second hollow pipe 102 is clung to the inner wall of one side, far away from the center of the outer sleeve 1, of the first hollow pipe 101.
The two ends of the outer sleeve 1 are close to each other, the filling support structure 2 comprises a central support tube 103, the central support tube 103 and the outer sleeve 1 are concentrically arranged, a plurality of first hollow tubes 101 are circumferentially arranged on the inner wall of the outer sleeve 1, the end portions of the first hollow tubes 101 are arranged between the outer wall of the central support tube 103 and the inner wall of the outer sleeve 1, the filling support structure 2 further comprises first filling rods 104, a plurality of first filling rods 104 are circumferentially arranged in the outer sleeve 1 close to the two ends, and each first filling rod 104 is arranged between every two adjacent first hollow tubes 101.
The filling support structure 2 is only arranged at two ends of the prefabricated rod, the middle part of the filling support structure is not arranged, the positioning support function is achieved, when the prefabricated rod vertically enters the wire drawing furnace, the filling support structure 2 is closely attached to the hollow tubes, a certain friction force exists, the filling support structure 2 cannot fall off, after heating, the filling support structure 2 can deform along with the outer sleeve and the hollow tubes, the outer sleeve and the hollow tubes are fused into a whole, and the hollow tubes are fused and welded on the inner wall of the outer sleeve 1 along with the drawing process.
The central support tube 103 can also be made of a solid rod, but is hollow because of the large diameter and heavy weight and the difficulty in falling off due to the friction force during vertical drawing.
The first filling rod 104 is tangent to the outer wall of the adjacent first hollow tube 101 and the inner wall of the outer sleeve 1 or the first filling rod 104 is tangent to the outer wall of the adjacent first hollow tube 101 and the outer wall of the central support tube 103.
The first hollow tube 101 is internally provided with a second hollow tube 102, the second hollow tube 102 is arranged on the connecting line between the center of the first hollow tube 101 and the center of the outer sleeve 1, and the outer wall of the second hollow tube 102 is tangent with the inner wall of one side, far away from the center of the outer sleeve 1, of the first hollow tube 101.
The hollow tubes are circumferentially uniformly distributed, the circumferential arrangement quantity can be odd or even, the hollow tubes can be single hollow tubes or multiple hollow tubes are nested, the multiple hollow tubes are needed to be tangent at one side far from the center of the outer sleeve 1 when being nested, and the antiresonance effect is better.
For a single hollow tube type antiresonance structure, only the first filling rod 104 needs to be inserted between adjacent hollow tubes, the first filling rod 104 is abutted against the two first hollow tubes 101, and for a multi-hollow tube type nested antiresonance structure, a plurality of filling rods also need to be filled in the second hollow tubes 102.
The two ends in the first hollow tube 101 are also provided with a plurality of filling rods, the plurality of filling rods are arranged between the outer wall of the second hollow tube 102 and the inner wall of the first hollow tube 101, the diameters of the plurality of filling rods can be the same or different, but the diameters need to be calculated in advance, the tolerance is adjusted, and the matching compactness is improved.
The filling support structure 2 further comprises a second filling rod 105, a third filling rod 106, a fourth filling rod 107 and a fifth filling rod 108, wherein the second filling rod 105, the third filling rod 106, the fourth filling rod 107 and the fifth filling rod 108 are arranged in the second hollow tube 102, the second filling rod 105 is arranged on the opposite side of the second hollow tube 102 in the first hollow tube 101, the third filling rod 106 is arranged on two sides of the second filling rod 105 and the second hollow tube 102, and the fourth filling rod 107 and the fifth filling rod 108 are respectively arranged on two sides of the third filling rod 106.
The diameter of the second filling rod 105 and the diameter of the second hollow tube 102 are equal to the diameter of the inner wall of the first hollow tube 101, then the third filling rod 106 is selected to ensure that the second filling rod is inscribed with the first hollow tube 101, and if necessary, the fourth filling rod 107, the fifth filling rod 108 and the like are selected to ensure that the filling is tight.
In a preferred embodiment, the method comprises a first filling method:
placing the first hollow tube 101 horizontally;
attaching the second hollow tube 102 to the inner wall of the first hollow tube 101;
filling each filling rod into a space between the inner wall of the first hollow tube 101 and the outer wall of the second hollow tube 102 to form a combination;
the outer sleeve 1 is horizontally arranged;
the combination body is attached to the inner wall of the outer sleeve 1, so that the centers of the outer sleeve 1, the first hollow pipe 101 and the second hollow pipe 102 are in a straight line, and the second hollow pipe 102 is arranged on one side far from the center of the outer sleeve 1;
the first filling rods 104 and other assemblies are alternately placed on two sides of the assembly, the central supporting tube 103 is placed at the same time, the concentric arrangement of the central supporting tube 103 and the outer sleeve 1 is ensured, and the positions of the second hollow tube 102 are adjusted at the same time, so that the centers of the outer sleeve 1, the first hollow tube 101 and the second hollow tube 102 are in a straight line, and the second hollow tube 102 is arranged on one side far from the center of the outer sleeve 1.
In a preferred embodiment, the method comprises a second filling method:
placing the outer sleeve 1 horizontally on the preform carrier 3;
a plurality of first hollow tubes 101 are put in the outer sleeve 1;
a second hollow tube 102 is placed in each first hollow tube 101;
positioning the first hollow tubes 101 and the second hollow tubes 102 so that the centers of the outer sleeve 1, the first hollow tubes 101 and the second hollow tubes 102 are in a straight line and the second hollow tubes 102 are arranged on one side far from the center of the outer sleeve 1;
the gaps between the outer sleeve 1 and the second hollow tube 102 are filled with filling rods.
After the prefabricated rod is manufactured, the two ends of the prefabricated rod can be fixed by using a polytetrafluoroethylene belt, friction force is increased, and the prefabricated rod is unwound before a wire drawing furnace.
The first method has the main idea that after each combination is filled, a plurality of combinations are filled in the outer sleeve 1, the technology is split and is suitable for modularized production, but the direction of the second hollow tube 102 needs to be adjusted when the combination is filled in the outer sleeve 1;
the idea of the second method is to first fix the positions of the first hollow tube 101 and the second hollow tube 102 directly and then fill the gaps entirely, but a fixing device is required to support the hollow tubes.
Therefore, in a preferred embodiment, the hollow tube positioning device 4 is further included, the hollow tube positioning device 4 includes a plurality of positioning claw assemblies 5 arranged circumferentially, the positioning claw assemblies 5 are telescopic, the positioning claw assemblies 5 include a plurality of picking needles 501, and the picking needles 501 are abutted against the inner wall of the first hollow tube 101 or the second hollow tube 102 for positioning the first hollow tube 101 or the second hollow tube 102.
The picking needle 501 has a multi-section structure, is thick in root part and high in strength, and is thin at the outer end, so that a thinner hollow tube can be conveniently inserted.
The positioning jaw assembly 5 is present as a positioning guide tool to help adjust the orientation of the second hollow tube 102 in the first filling method and the support means of each hollow tube in the second filling method.
In a preferred scheme, the positioning claw assembly 5 comprises an end block 508, a plurality of rotating blocks 502 are circumferentially arranged on the end block 508, a plurality of holes are formed in the end block 508, a rotating shaft 503 is arranged at the center of the rotating block 502, the rotating shaft 503 is inserted into the holes for rotation, the picking needles 501 are eccentrically arranged on the end face of the rotating block 502, when the rotating block 502 rotates, the picking needles 501 eccentrically rotate, the picking needles 501 are respectively close to or far away from each other, as shown in fig. 12-13, different pipe diameters can be met, the first hollow pipe 101 can be clamped, the second hollow pipe 102 can be met, in order to drive the rotating block 502 and prevent the rotating block 502 from being separated, a rotatable tack 504 is arranged in the middle of the end block 508, a conical surface is arranged on the tack 504, the rotating block 502 is correspondingly provided with a conical surface, a friction layer is preferably coated, the conical surface of the tack 504 presses the conical surface of each rotating block 502, and the rotating blocks 502 are driven to rotate simultaneously.
The rotating blocks 502 are provided with notch structures, so that the large-head pressing nails 504 are convenient to assemble and disassemble, the end parts of the large-head pressing nails 504 are sleeved with disc springs 505, then the stop blocks 506 are sleeved, and finally the bolts 507 are inserted to press the rotating blocks 502 on the end blocks 508.
In a preferred scheme, the hollow tube positioning device 4 comprises a plurality of vane plates 405 capable of gathering towards the center, a guide sleeve 510 is arranged on each vane plate 405, a guide rod 509 is arranged at one end of the end block 508, the guide rod 509 is in sliding sleeve connection with the guide sleeve 510, a locking knob 511 in threaded connection is arranged on the guide sleeve 510, and the guide rod 509 can be locked.
In the preferred scheme, hollow tube positioning device 4 still includes rolling disc 402 and big fluted disc 403, and rolling disc 402 is equipped with a plurality of first revolving posts 407 along the circumference, and big fluted disc 403 is equipped with multistage arc groove 408 that link up along the circumference, and each first revolving post 407 card slides in each arc groove 408, and rolling disc 402 and big fluted disc 403 coaxial rotation, big fluted disc 403 are equipped with a plurality of second revolving posts 409 along the circumference, are equipped with the pulling piece 404 of rotation connection on the second revolving post 409, and the pulling piece 404 other end articulates with lamina 405.
When the large fluted disc 403 is driven to rotate, each vane plate 405 contracts inwards or expands outwards, and the position radius of each positioning claw assembly 5 is changed to adapt to the requirements of the prefabricated rods with different diameters, but as the positioning claw assemblies 5 are spiral lines for walking tracks, when prefabricated rods with other diameters are manufactured, the positions of the positioning claw assemblies 5 are twisted by a certain angle, the operation postures are awkward, and the habit of an operator is not satisfied.
Therefore, in the preferred scheme, the rotary disk device further comprises a fixed disk 401, the fixed disk 401 is rotationally connected with the rotary disk 402, an annular groove 411 is formed in the outer wall of the rotary disk 402, a plurality of clamping pins 410 are arranged on the fixed disk 401 along the circumferential direction, the clamping pins 410 are clamped in the annular groove 411 to slide, a plurality of straight grooves 406 are formed on the fixed disk 401 along the circumferential direction, the straight grooves 406 are radially arranged along the fixed disk 401 along the length direction, and the guide sleeve 510 is clamped in the straight grooves 406 to slide.
The guide sleeve 510 makes the moving track of the positioning claw assembly 5 linearly centering or centrifugally moving under the limit of the straight groove 406, so that the positioning claw assembly is in accordance with the habit of an operator.
In the preferred scheme, the utility model also is provided with a base 11, a fixed disk 401 is fixedly connected with the base 11, a rotatable first pinion 6 is arranged on the fixed disk 401, a rotatable second pinion 7 and a worm wheel 8 are arranged on one side of the first pinion 6, the first pinion 6 is meshed with the second pinion 7 for rotation, the second pinion 7 is connected with a middle shaft of the worm wheel 8, a rotatable worm 9 is arranged on the base 11, and the worm 9 is meshed with the worm wheel 8 for rotation.
In the preferred scheme, one end of the worm 9 is provided with a hand wheel 10 or a motor, so that the position radius of the positioning claw assembly 5 can be controlled manually or automatically.
There are various methods of using the hollow tube positioning device 4, the first is:
placing the outer sleeve 1 on a prefabricated rod bracket 3, adjusting the horizontal position, and installing hollow tube positioning devices 4 at two ends of the prefabricated rod bracket 3, wherein the hollow tube positioning devices 4 are at a proper distance from the end face of the outer sleeve 1;
placing the first hollow tubes 101 into the outer sleeve 1, and placing a second hollow tube 102 into each first hollow tube 101;
the adjusting worm 9 is rotated, the position radius of each positioning claw assembly 5 is adjusted to be a set radius, the large-head press nails 504 are rotated to adjust the positions of the picking needles 501, the maximum surrounding outline diameter of the plurality of picking needles 501 is close to the inner diameter of the second hollow tube 102, the guide rod 509 extends forwards and is inserted into the second hollow tube 102, and the locking knob 511 is locked;
the same operation is performed on the hollow tube positioning device 4 at the other end of the preform bracket 3, the second hollow tubes 102 are erected, each second hollow tube 102 is lifted up according to the method, each first hollow tube 101 is in a natural sagging state at the moment, the first filling rod 104 is filled into the outer sleeve 1, and the position of the first hollow tube 101 is fixed;
each of the first hollow tubes 101 is filled with each of the filling rods.
The second is:
placing the outer sleeve 1 on a prefabricated rod bracket 3, adjusting the horizontal position, and installing hollow tube positioning devices 4 at two ends of the prefabricated rod bracket 3, wherein the hollow tube positioning devices 4 are at a proper distance from the end face of the outer sleeve 1;
placing the first hollow tubes 101 into the outer sleeve 1, and placing a second hollow tube 102 into each first hollow tube 101;
the adjusting worm 9 is rotated to adjust the position radius of each positioning claw assembly 5 to be a set radius, the large-head press nails 504 are rotated to adjust the positions of the picking needles 501, the maximum surrounding outline diameter of the plurality of picking needles 501 is close to the inner diameter of the first hollow pipe 101, the guide rod 509 extends forwards and is inserted into the first hollow pipe 101, and the locking knob 511 is locked;
filling the first filling rod 104 into the outer sleeve 1 to fix the position of the first hollow tube 101;
rotating the adjusting worm 9, increasing the position radius of each positioning claw assembly 5, reducing the opening of the picking needle 501, extending the guide rod 509 forwards and inserting the picking needle 501 into the second hollow tube 102;
the same operation is performed on the hollow tube positioning device 4 at the other end of the preform carrier 3, the second hollow tubes 102 are set up, and each second hollow tube 102 is set up according to the method;
each of the first hollow tubes 101 is filled with each of the filling rods.
The third method is as follows:
placing the first hollow tube 101 horizontally;
attaching the second hollow tube 102 to the inner wall of the first hollow tube 101;
filling each filling rod into a space between the inner wall of the first hollow tube 101 and the outer wall of the second hollow tube 102 to form a combination;
the outer sleeve 1 is horizontally arranged;
the combination body is attached to the inner wall of the outer sleeve 1, at the moment, one guide rod 509 extends forwards, the opening of the picking needle 501 on the guide rod is adjusted to correspond to the second hollow tube 102, and the combination body is rotated to enable the orifice of the second hollow tube 102 to be inserted into the picking needle 501, so that the second hollow tube 102 is accurately positioned;
the first filling rods 104 and other assemblies are alternately placed on two sides of the assembly, the central supporting tube 103 is placed at the same time, the central supporting tube 103 and the outer sleeve 1 are concentrically arranged, the rest of the positioning claw assemblies 5 are extended forwards, the picking needles 501 are adjusted, the positions of the second hollow tubes 102 are adjusted, so that the positioning claw assemblies 5 can be inserted into the second hollow tubes 102, and the positions of all the hollow tubes are aligned.
The third method corresponds to the first filling method, and the first method and the second method correspond to the second filling method.
The above embodiments are only preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention should be defined by the claims, including the equivalents of the technical features in the claims. I.e., equivalent replacement modifications within the scope of this invention are also within the scope of the invention.
Claims (8)
1. A preparation method of a hollow anti-resonance optical fiber intermediate preform is characterized by comprising the following steps:
drawing each first hollow tube (101), each second hollow tube (102), each central support tube (103) and each filling rod;
the outer sleeve (1) is horizontally placed, a first hollow pipe (101), a second hollow pipe (102), a central supporting pipe (103) and filling rods are placed in the outer sleeve (1), the second hollow pipe (102) and the first filling rods (104) are alternately arranged along the circumferential direction of the outer wall of the central supporting pipe (103), the first hollow pipe (101) is tightly attached to the inner wall of the outer sleeve (1), and the second hollow pipe (102) is tightly attached to the inner wall of one side, far away from the center of the outer sleeve (1), of the first hollow pipe (101);
the device comprises a hollow tube positioning device (4), wherein the hollow tube positioning device (4) comprises a plurality of positioning claw assemblies (5) which are circumferentially arranged, the positioning claw assemblies (5) are telescopic, the positioning claw assemblies (5) comprise a plurality of picking needles (501), and the picking needles (501) are tightly attached to the inner wall of the first hollow tube (101) or the second hollow tube (102) and are used for positioning the first hollow tube (101) or the second hollow tube (102);
the positioning claw assembly (5) comprises an end block (508), a plurality of rotating blocks (502) are arranged on the end block (508) along the circumferential direction, the rotating blocks (502) are provided with eccentrically arranged picking needles (501), the middle part of the end block (508) is provided with rotatable large-head pressing nails (504), and the end parts of the large-head pressing nails (504) press each rotating block (502).
2. The method for preparing the hollow anti-resonance optical fiber intermediate preform according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
placing the first hollow tube (101) horizontally;
the second hollow tube (102) is attached to the inner wall of the first hollow tube (101);
filling each filling rod into a space between the inner wall of the first hollow tube (101) and the outer wall of the second hollow tube (102) to form a combination;
the outer sleeve (1) is horizontally arranged;
the combination body is attached to the inner wall of the outer sleeve (1), the centers of the outer sleeve (1), the first hollow pipe (101) and the second hollow pipe (102) are guaranteed to be in a straight line, and the second hollow pipe (102) is arranged on one side far away from the center of the outer sleeve (1);
the first filling rods (104) and other assemblies are alternately placed on two sides of the assembly, meanwhile, the central supporting tube (103) is placed, the central supporting tube (103) and the outer sleeve (1) are concentrically arranged, meanwhile, the positions of the second hollow tube (102) are adjusted, so that the centers of the outer sleeve (1), the first hollow tube (101) and the second hollow tube (102) are in a straight line, and the second hollow tube (102) is arranged on one side far away from the center of the outer sleeve (1).
3. The method for preparing the hollow anti-resonance optical fiber intermediate preform according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
the outer sleeve (1) is horizontally placed;
a plurality of first hollow tubes (101) are put in the outer sleeve (1);
placing a second hollow tube (102) in each first hollow tube (101);
positioning the first hollow pipes (101) and the second hollow pipes (102) so that the centers of the outer sleeve (1), the first hollow pipes (101) and the second hollow pipes (102) are in a straight line, and the second hollow pipes (102) are arranged on one side far from the center of the outer sleeve (1);
the gaps of the outer sleeve (1) and the second hollow tube (102) are filled with filling rods.
4. The method for preparing the hollow anti-resonance optical fiber intermediate preform according to claim 1, wherein the method comprises the following steps: the hollow tube positioning device (4) comprises a plurality of vane plates (405) capable of gathering towards the center, guide sleeves (510) are arranged on each vane plate (405), a guide rod (509) is arranged at one end of each end block (508), and the guide rods (509) are in sliding sleeve connection with the guide sleeves (510).
5. The method for preparing the hollow anti-resonance optical fiber intermediate preform according to claim 4, wherein the method comprises the following steps: the hollow tube positioning device (4) further comprises a rotating disc (402) and a big fluted disc (403), the rotating disc (402) and the big fluted disc (403) rotate coaxially, a plurality of pulling pieces (404) are arranged on the big fluted disc (403) along the circumferential direction, and two ends of each pulling piece (404) are hinged with the blade plate (405) and the big fluted disc (403) respectively.
6. The method for preparing the hollow anti-resonance optical fiber intermediate preform according to claim 5, wherein the method comprises the following steps: the novel rotary table further comprises a fixed disc (401), the fixed disc (401) is rotationally connected with the rotary disc (402), a plurality of straight grooves (406) are formed in the fixed disc (401) along the circumferential direction, the straight grooves (406) are radially arranged along the fixed disc (401) in the length direction, and the guide sleeve (510) is clamped in the straight grooves (406) to slide.
7. The method for preparing the hollow anti-resonance optical fiber intermediate preform according to claim 6, wherein the method comprises the following steps: still be equipped with base (11), fixed disk (401) and base (11) fixed connection are equipped with rotatable first pinion (6) on fixed disk (401), first pinion (6) one side is equipped with rotatable second pinion (7) and worm wheel (8), first pinion (6) and second pinion (7) meshing rotate, second pinion (7) and worm wheel (8) axis connection, be equipped with rotatable worm (9) on base (11), worm (9) and worm wheel (8) meshing rotate.
8. The method for preparing the hollow anti-resonance optical fiber intermediate preform according to claim 7, wherein the method comprises the following steps: one end of the worm (9) is provided with a hand wheel (10) or a motor.
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