CN207987040U - A kind of casing prefabricated rods - Google Patents
A kind of casing prefabricated rods Download PDFInfo
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- CN207987040U CN207987040U CN201721907159.7U CN201721907159U CN207987040U CN 207987040 U CN207987040 U CN 207987040U CN 201721907159 U CN201721907159 U CN 201721907159U CN 207987040 U CN207987040 U CN 207987040U
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- casing
- plug
- prefabricated rods
- tail pipe
- locating piece
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Abstract
The utility model creation provides a kind of casing prefabricated rods, including sheath assembly and the mandrel component that is inserted perpendicularly into sheath assembly；Described sleeve pipe component includes that casing, the tail pipe on casing top and the fixed locating ring of inner wall of liner and tail pipe top vacuumize chuck for sealing；The mandrel component includes the locating piece of plug and plug upper end and locating ring cooperation；The plug and casing are coaxial；Across chuck is vacuumized, equipped with the mandril for resisting locating piece.The utility model creation is that plug is perpendicularly inserted in casing, neither cause plug in the friction of internal surface of sleeve pipe, also ensure concentricity of the plug in casing, assembled casing prefabricated rods can transport directly to fiber drawing tower and carry out vacuumizing operation simultaneously, then wire-drawing operation is completed, the link in optical fiber shop assembled is reduced.
Description
Technical field
The invention belongs to preform research and development and manufacturing technology field, more particularly, to a kind of casing prefabricated rods.
Background technology
Preform is made of plug and covering two parts, can be divided into tiretube process and directly outside according to a combination thereof structure
Sedimentation two types.Tiretube process is that the plug of preform and covering are respectively prepared separately, and is then combined and online
Or offline collapsing is at a kind of method of complete preform.The plug of tiretube process is solid stick, and casing is hollow pipe, as optical fiber
The clad section of prefabricated rods.Direct external sedimentation is the method for the Direct precipitation covering outside plug.
The method for manufacturing optical fiber prefabricated rod mandrel is mainly chemical vapour deposition technique, and prevailing technology includes：Improvedization
Learn gas-phase deposition；Microwave plasma CVD technique；Outside vapor deposition process and gas phase axial deposition work
Skill etc..The preparation method of optical fiber prefabricating stick cladding includes chemical vapour deposition technique and physical deposition methods two types.Vapor deposition
VAD and OVD etc. is referred mainly to, physical method refers mainly to advanced plasma gas phase deposition technique.
It includes mainly following steps that online tiretube process, which prepares prefabricated rods and the flow of drawing process,：(1) system of casing
Standby and drawing cone；(2) preparation of plug；(3) HF of casing and plug is cleaned；(4) plug and sleeve-assembled are at prefabricated rods；
(5) prefabricated rod assembly is melted at high temperature and carries out wire drawing.Melting or when wire drawing, it is necessary to cavity between plug and casing into
Row vacuumize process prevents the generation of bubble or gas line in optical fiber.
The method that existing casing prefabricated rods technology mainly uses is：By in the plug lower end plug-in-sleeve of preparation with conehead
Location contacts, top are fixed using special sealing device, and carry out vacuumize process to the cavity of casing and plug.This dress
The mode matched is cumbersome for installation, complicated for operation, and plug has friction in plug-in-sleeve, once generating friction, is easy to cause broken
Bits are fallen, it is possible to which phenomena such as production capacity wire drawing is disconnected fine, attenuation is abnormal, intensity difference also be easy to cause gas line, air bubble problem.Moreover,
This assembly method is it is difficult to ensure that the concentricity of plug and casing is easily made if plug deviates the center of casing in drawing optical fiber
At the coaxiality deviation between sandwich layer and covering.Casing prefabricated rods are all that casing and plug are separated at present, are individually transported, so
Assemble carry out wire drawing online afterwards.
Invention content
In view of this, the invention is intended to overcome above-mentioned defect existing in the prior art, propose that a kind of casing is prefabricated
Stick can effectively improve the geometrical property of optical fiber.
In order to achieve the above objectives, the technical solution of the invention is realized in：
A kind of casing prefabricated rods, including sheath assembly and the mandrel component that is inserted perpendicularly into sheath assembly；Described sleeve pipe
Component includes the pumping of casing, the tail pipe on casing top and the fixed locating ring of inner wall of liner and tail pipe top for sealing
Vacuum chuck；The mandrel component includes the locating piece of plug and plug upper end and locating ring cooperation；The plug and casing
Coaxially；Across chuck is vacuumized, equipped with the mandril for resisting locating piece.
Further, the locating piece is in cylindrical structure, has a diameter larger than diameter of mandrel；The outer wall of the locating piece with it is fixed
The inner wall cooperation of position ring.
Further, the plug lower end is equipped with conehead.
Further, the plug top is welded and fixed with locating piece.
Further, the inner wall of liner is equipped with the card slot for installing locating ring.
Further, described sleeve pipe upper end is welded with tail pipe.
A method of the above-mentioned casing prefabricated rods of manufacture, steps are as follows：
1. preparing plug；
2. drawing cone to handle using flame lathe plug lower end, conehead is formed；
3. the locating piece that above-mentioned plug top is more than to diameter of mandrel with diameter is welded and fixed, the mandrel component after welding
Bow degree controls within 0.5mm/m；
4. casing part polishes to form chamfering, chamfering position is drawn into cone point later；
5. cutting off the cone point of casing part, venthole is formed；
6. the upper end of above-mentioned casing is welded and fixed with tail pipe, sheath assembly is made；
7. processing the card slot for installing locating ring on the top of inner wall of liner；
8. by mandrel component plug-in-sleeve component, locating ring is installed, the locating piece of locating ring inner wall and mandrel component is made
Fitting, locating ring outer wall are bonded with card slot inner wall；
9. installation vacuumizes chuck on tail pipe top, mandril is inserted by vacuumizing on the outside of chuck, mandrel component is resisted
Locating piece top.
Further, step 2. in, the conehead of plug lower end need to polish chamfering through grinding machine.
Further, step 6. in, after welding, ensure casing and tail pipe seam crossing without protrusion or gas line.
Compared with the existing technology, the invention has the advantage that：
The casing prefabricated rods that the invention provides use the Combination Design of locating ring and locating piece, it is possible to reduce plug exists
When plug-in-sleeve and the collision of internal surface of sleeve pipe, friction, reduction casing prefabricated stick drawn wire generate gas line and bubble in the process.Pass through this
Kind Combination Design, may be implemented collimation of the plug in casing and the function in, can optimize the core concentricity of optical fiber,
Improve the quality of optical fiber.Meet long-distance transportation requirement by this assembling mode, reduces and provide clean dress in optical fiber workshop
With, reduce the assembly time of optical fiber production employee, improves the efficiency of wire-drawing equipment.
Description of the drawings
The attached drawing for constituting the part of the invention is used for providing further understanding the invention, present invention wound
The illustrative embodiments and their description made do not constitute the improper restriction to the invention for explaining the invention.
In attached drawing：
Fig. 1 is the structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram of the invention middle sleeve；
Fig. 3 is the structural schematic diagram of locating ring in the invention.
Reference sign：
1- casings；2- tail pipes；3- locating rings；4- vacuumizes chuck；5- plugs；6- locating pieces；7- mandrils；8- coneheads；9-
Card slot.
Specific implementation mode
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the invention can
To be combined with each other.
In the description of the invention, it is to be understood that term "center", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description the invention and simplifies to describe, rather than indicate
Or imply that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore cannot understand
For the limitation to the invention.In addition, term " first ", " second " etc. are used for description purposes only, and should not be understood as indicating
Or it implies relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " etc. are defined as a result,
Feature can explicitly or implicitly include one or more this feature.In the description of the invention, unless separately
It is described, the meaning of " plurality " is two or more.
In the description of the invention, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition
State concrete meaning of the term in the invention.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments creates.
A kind of casing prefabricated rods, as shown in Figures 1 to 3, including sheath assembly and the plug that is inserted perpendicularly into sheath assembly
Component；Described sleeve pipe component includes casing 1, the tail pipe 2 on 1 top of casing and the fixed locating ring 3 of 2 inner wall of tail pipe and tail
2 top of pipe vacuumizes chuck 4 for sealing；The mandrel component includes that plug 5 and plug upper end coordinate with locating ring 3
Locating piece 6；The plug and casing are coaxial；Across chuck 4 is vacuumized, equipped with the mandril 7 for resisting locating piece.
Above-mentioned locating piece is in cylindrical structure, has a diameter larger than diameter of mandrel；The outer wall of the locating piece and locating ring
Inner wall coordinates.
Above-mentioned plug lower end is equipped with conehead 8.Above-mentioned plug top is welded and fixed with locating piece.Above-mentioned sleeve upper end and tail pipe
Welding.Above-mentioned inner wall of liner is equipped with the card slot 9 for installing locating ring.
A kind of method of the above-mentioned casing prefabricated rods of manufacture is provided below, steps are as follows：
1. preparing plug；
2. drawing cone to handle using flame lathe plug lower end, conehead is formed；
3. the locating piece that above-mentioned plug top is more than to diameter of mandrel with diameter is welded and fixed, the mandrel component after welding
Bow degree controls within 0.5mm/m；
4. casing part polishes to form chamfering, chamfering position is drawn into cone point later；
5. cutting off the cone point of casing part, venthole is formed；
6. the upper end of above-mentioned casing is welded and fixed with tail pipe, sheath assembly is made；
7. processing the card slot for installing locating ring on the top of inner wall of liner；
8. by mandrel component plug-in-sleeve component, locating ring is installed, the locating piece of locating ring inner wall and mandrel component is made
Fitting, locating ring outer wall are bonded with card slot inner wall；
9. installation vacuumizes chuck on tail pipe top, mandril is inserted by vacuumizing on the outside of chuck, mandrel component is resisted
Locating piece top.
The above-mentioned casing prefabricated rods that assemble are inserted into fiber drawing furnace, the tracheae vacuumized is plugged, after heating wire drawing be
It can.Step 2. in, the conehead of plug lower end need to polish chamfering through grinding machine.Step 6. in, after welding, ensure casing and tail pipe
Seam crossing is without protrusion or gas line.
It should be noted that above-mentioned plug is prepared using method in pipe or the outer method of pipe, the sandwich layer for mixing Ge is contained in plug
It is formed with the inner cladding of pure SiO2 (or mixing the SiO2 of F), sintered plug will be deposited and test system in precast rod refractivity
(PK2600) after test passes, plug is extended into suitable outer diameter further according to core packet ratio, to carry out next step operation.
When making mandrel component, the lower end of plug draws cone to handle using flame lathe, and the conehead of plug is beaten using grinding machine
Chamfering is ground, prevents mandrel component from scratching internal surface of sleeve pipe in plug-in-sleeve component, the upper end of plug and locating piece utilize flame vehicle
Bed welding, locating piece are in cylindrical structure, and diameter is more than diameter of mandrel, ensure joint location without apparent protrusion and seam after welding
Place's bubble-free is deposited, while the bow degree of mandrel component is in 1mm/m.It is preferably controlled in 0.5mm/m.
In addition, the welding of the drawing cone and plug upper end and locating piece of plug lower end is all made of Plasma Welding lathe reality
It is existing, can reduce optical fiber 1383nm water peak.The mandrel component processed is using HF acid and Pure water preparation, etching extent control
In 0.5mm, wrapped with cleaning bag after high pure nitrogen is dried spare.
When making sheath assembly, casing part polishes to form outer chamfer by grinding machine first, then by lower end chamfered section
Position drawing is tapered, while cutting off the position of casing tapered tip, forms venthole.Casing top in grinding machine polishing by falling
Then angle is welded with tail pipe, seam crossing is without protrusion or gas line, while bow degree ＜ 0.5mm/m of sheath assembly after welding.Tail pipe
Inner cavity carries out slot treatment, is used for placement positioning ring, locating ring outer wall and tail pipe contact, in locating ring inner wall and mandrel component
Locating piece contacts, and is placed above tail pipe and vacuumizes chuck for sealing.
The taper of casing part can realize casing in graphite furnace by falling cone, ensure the shape in tapering.It will processing
Good sheath assembly is controlled using HF acid and Pure water preparation, etching extent in 0.2mm.Utilize lantern will after high pure nitrogen is dried
The venthole of casing conehead seals, and continues to be dried with high pure nitrogen after conehead cooling, then be wrapped with cleaning bag.
When assembling this casing prefabricated rods, the casing that lower end seals is transferred on fortune stick vehicle first, casing is placed vertically,
Groove in tail pipe inner cavity places the locating ring crossed with HF acid and Pure water preparation, then mandrel component is vertically slowly inserted
Enter in tail pipe locating ring, due to there is a presence of locating ring, plug reduce in plug-in-sleeve plug and internal surface of sleeve pipe collision,
Friction.
It is inserted perpendicularly into tail pipe behind plug lower end and casing taper contact, then mandril, pushes down locating piece, will vacuumized
Chuck slowly passes through mandril, falls on the surface of tail pipe, and it is all locked to vacuumize chuck and mandril by locking device.Plug
Collimation, the function in are kept in casing, while not will produce shaking when transporting casing stick, meet the item of long-distance transport
Part.
Each component concrete structure setting is as follows in the invention：
Plug：The range of its outer diameter OD1 is：OD1 ＜ ID3, the range of length L1 are：1200~1700mm.
Casing：The range of its internal diameter ID2 is：(OD1+1)~(OD1+4) range of mm, length L2 are L2 >=(L1+30)
Mm, outer diameter OD2 are determined by the design of optical fiber.
Tail pipe：Its outer diameter OD3 is consistent with sleeve outer, and the range of internal diameter ID3 is 70~85mm, and length L3 is by optical fiber
Wire-drawer-tower minimum allowable length determines.The range of the outer diameter OD4 of tail pipe lumen channels is (OD3-60)~(OD3-40) mm, in
The range of diameter ID4 is (ID3-25)~(ID3-15) mm, distance L4≤L2 of groove to casing.
Locating ring：The range (ID4-1) of its outer diameter OD5~(ID4-0.5) mm, the range of internal diameter ID5 is ID2≤ID5
≤ ID4, the distance L5 ranges at the top of tail pipe are L5≤L2-L4, are fixed on the groove top of tail pipe inner cavity, and material is
Glass sand, and be processed by shot blasting.
Locating piece：The range of its outer diameter OD6 is (ID5-1)~(ID5-0.5) mm, and length L6 is by tail pipe lumen channels
Position determines that range is L4≤L6≤L2.Similarly, material is also glass sand, and is processed by shot blasting.
Embodiment 1
A plug is made after oversintering, extension processing in the Powder Rod prepared using VAD techniques.Pass through the survey of PK2600
The refractive index profile for trying plug, obtains its cored than 4.20.The length of plug is 1500mm, a diameter of 36mm.The length of locating piece
Spend 1200mm, diameter 60mm.By plug lower end in the pull-up cone processing of flame lathe, plug upper end and locating piece are on flame lathe
Welding, the bow degree of mandrel component is controlled in 0.2mm/m after welding.Mandrel component is handled with HF and pure water again, is handled
After to be put into drying cupboard for use.
It is 130mm using outer diameter, the casing of internal diameter 37mm welds casing and tail pipe first on flame lathe, tail pipe
Outer diameter 150mm, internal diameter 82mm, length 1250mm.Rear joint position is welded without gas line, while welding rear enclosure tube assembly bow degree
Meet 0.1mm/m.Using numerically controlled lathe by tail pipe upper end slot treatment, internal diameter 91mm after fluting, apart from tail pipe upper end distance
30mm.Lower end draws cone or falls cone by heating furnace and handles using flame lathe, forms the venthole of 10-20mm, then
Sheath assembly is utilized into HF and Pure water preparation, the venthole of dried sheath assembly lower end is sealed with oxyhydrogen flame blowtorch and is bored.
Mandrel component and sheath assembly are assembled in toilet.Sheath assembly is transferred to fortune stick using driving first
On trolley, sheath assembly is placed vertically, the locating ring crossed with HF and Pure water preparation is mounted in the slot of tail pipe and is fixed, then
Mandrel component is inserted perpendicularly into tail pipe, is fixed at locating ring.Mandril is inserted into tail pipe again, withstands in mandrel component and determines
Position block, then chuck will be vacuumized and be fixed on tail pipe upper end, it is locked with locking device.Ensure mandrel component nothing inside sheath assembly
It shakes.Casing prefabricated rods are packaged with cleaning bag again, transport drawing plant, naturally it is also possible to be cased, be met and transport over long distances
Defeated condition.
The prefabricated rod assembly of casing is suspended in wire-drawer-tower Gua Bang mechanisms, pipe will be vacuumized and plug vacuum pump, you can is completed
The wire drawing preparation of casing prefabricated rods.
The wire drawing data of optical fiber are as shown in table 1 below, are satisfied by the parameter request of G652D optical fiber.
The optical fiber parameter of 1 new structure casing prefabricated rods of table
Embodiment 2
A plug is made after oversintering, extension processing in the Powder Rod prepared using VAD techniques.Pass through the survey of PK2600
The refractive index profile for trying plug, obtains its cored than 3.90.The length of plug is 1700mm, a diameter of 39mm.Locating piece 22
Length 1200mm, diameter 60mm.By plug lower end in the pull-up cone processing of flame lathe, plug upper end and locating piece are in flame lathe
Upper welding, the bow degree of mandrel component is controlled in 0.2mm/m after welding.Mandrel component is handled with HF and pure water again, is located
It is for use that drying cupboard is put into after reason.
Casing is welded casing and tail pipe first on flame lathe using the casing that outer diameter is 150mm, internal diameter 43mm,
The outer diameter 150mm of tail pipe, internal diameter 82mm, length 1250mm.Rear joint position is welded without gas line, while welding rear enclosure tube assembly bow
Curvature meets 0.1mm/m.Using numerically controlled lathe by tail pipe upper end slot treatment, internal diameter 91mm after fluting, apart from tail pipe upper end away from
From 30mm.
Lower end draws cone or falls cone by heating furnace and handles using flame lathe, forms the venthole of 10~20mm,
Then sheath assembly is utilized into HF and Pure water preparation, the venthole of dried sheath assembly lower end oxyhydrogen flame blowtorch is sealed
Cone.
Mandrel component and sheath assembly are assembled in toilet.Sheath assembly is transferred to fortune stick using driving first
On trolley, sheath assembly is placed vertically, the locating ring crossed with HF and Pure water preparation is mounted in the slot of tail pipe and is fixed, then
Mandrel component is inserted perpendicularly into tail pipe, is fixed at locating ring.Mandril is inserted into tail pipe again, withstands in mandrel component and determines
Position block, then chuck will be vacuumized and be fixed on tail pipe upper end, it is locked with locking device.
Ensure mandrel component inside sheath assembly without shaking.Casing prefabricated rods are packaged with cleaning bag again, are transported
Drawing plant, naturally it is also possible to case, meet long-distance transportation condition.
The prefabricated rod assembly of casing is suspended in wire-drawer-tower Gua Bang mechanisms, pipe will be vacuumized and plug vacuum pump, you can is completed
The wire drawing preparation of casing prefabricated rods.
The wire drawing data of optical fiber are as shown in table 2 below, are satisfied by the parameter request of G.652D optical fiber.
The optical fiber parameter of 2 new structure casing prefabricated rods of table
| Core-cladding concentricity error | Cutoff wavelength | 1310 mode field diameters | Zero-dispersion wavelength | 1383nm attenuations |
| um | nm | um | nm | dB/km |
| 0.2 | 1285 | 9.34 | 1308 | 0.278 |
The new structure that the present invention is combined using locating ring and locating piece, solves plug and is being inserted perpendicularly into internal surface of sleeve pipe
Friction, while ensuring collimation of the plug in casing and the function in using locating ring, ensure that the same of plug and casing
Axis degree.
The invention is that plug is perpendicularly inserted in casing, neither causes plug in the friction of internal surface of sleeve pipe, also protects
Concentricity of the plug in casing is demonstrate,proved, while assembled casing prefabricated rods can transport directly to fiber drawing tower and be taken out
Wire-drawing operation is then completed in vacuum operation, reduces the link in optical fiber shop assembled.By this assembling mode meet it is long away from
It is required from transport, reduces and provide clean assembly building in optical fiber workshop, reduce the assembly time of optical fiber production employee, improve
The efficiency of wire-drawing equipment.
The foregoing is merely the preferred embodiments of the invention, are not intended to limit the invention creation, all at this
Within the spirit and principle of innovation and creation, any modification, equivalent replacement, improvement and so on should be included in the invention
Protection domain within.
Claims (6)
1. a kind of casing prefabricated rods, it is characterised in that：Including sheath assembly and the core group being inserted perpendicularly into sheath assembly
Part；Described sleeve pipe component includes casing, the tail pipe on casing top and the fixed locating ring of inner wall of liner and tail pipe top
Chuck is vacuumized for sealing；The mandrel component includes the locating piece of plug and plug upper end and locating ring cooperation；Institute
It is coaxial with casing to state plug；Across chuck is vacuumized, equipped with the mandril for resisting locating piece.
2. a kind of casing prefabricated rods according to claim 1, it is characterised in that：The locating piece is in cylindrical structure,
Diameter is more than diameter of mandrel；The outer wall of the locating piece and the inner wall of locating ring coordinate.
3. a kind of casing prefabricated rods according to claim 1, it is characterised in that：The plug lower end is equipped with conehead.
4. a kind of casing prefabricated rods according to claim 1, it is characterised in that：The plug top and positioning block welding are solid
It is fixed.
5. a kind of casing prefabricated rods according to claim 1, it is characterised in that：The inner wall of liner is equipped with fixed for installing
The card slot of position ring.
6. a kind of casing prefabricated rods according to claim 1, it is characterised in that：It is welded with tail pipe described sleeve pipe upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721907159.7U CN207987040U (en) | 2017-12-29 | 2017-12-29 | A kind of casing prefabricated rods |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721907159.7U CN207987040U (en) | 2017-12-29 | 2017-12-29 | A kind of casing prefabricated rods |
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| Publication Number | Publication Date |
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| CN207987040U true CN207987040U (en) | 2018-10-19 |
Family
ID=63817478
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108117254A (en) * | 2017-12-29 | 2018-06-05 | 江苏通鼎光棒有限公司 | A kind of casing prefabricated rods and its manufacturing method |
| CN109553291A (en) * | 2018-12-13 | 2019-04-02 | 中国电子科技集团公司第四十六研究所 | A kind of modified panda protecting polarized light fiber prefabricated rods and manufacture craft |
| CN110357412A (en) * | 2019-07-29 | 2019-10-22 | 富通集团有限公司 | The manufacturing process of optical fiber |
-
2017
- 2017-12-29 CN CN201721907159.7U patent/CN207987040U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108117254A (en) * | 2017-12-29 | 2018-06-05 | 江苏通鼎光棒有限公司 | A kind of casing prefabricated rods and its manufacturing method |
| CN109553291A (en) * | 2018-12-13 | 2019-04-02 | 中国电子科技集团公司第四十六研究所 | A kind of modified panda protecting polarized light fiber prefabricated rods and manufacture craft |
| CN110357412A (en) * | 2019-07-29 | 2019-10-22 | 富通集团有限公司 | The manufacturing process of optical fiber |
| CN110357412B (en) * | 2019-07-29 | 2021-08-31 | 富通集团有限公司 | Process for manufacturing optical fiber |
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Effective date of registration: 20220811 Address after: 215233 Xiaoping Avenue, eight Town, Zhen Ze town, Wujiang District, Suzhou, Jiangsu 8 Patentee after: TONGDING INTERCONNECTION INFORMATION Co.,Ltd. Patentee after: JIANGSU TONGDING OPTICAL WAND Co.,Ltd. Address before: 215233 Tongjin Avenue, Wujiang Economic Development Zone, Suzhou, Jiangsu Patentee before: JIANGSU TONGDING OPTICAL WAND Co.,Ltd. |