CN218782448U - Steel wire armored loose tube for optical cable - Google Patents
Steel wire armored loose tube for optical cable Download PDFInfo
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- CN218782448U CN218782448U CN202221422459.7U CN202221422459U CN218782448U CN 218782448 U CN218782448 U CN 218782448U CN 202221422459 U CN202221422459 U CN 202221422459U CN 218782448 U CN218782448 U CN 218782448U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 76
- 239000010959 steel Substances 0.000 title claims abstract description 76
- 230000003287 optical effect Effects 0.000 title claims abstract description 51
- 239000013307 optical fiber Substances 0.000 claims abstract description 43
- 239000000835 fiber Substances 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims description 13
- 229920000642 polymer Polymers 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 8
- 229920001707 polybutylene terephthalate Polymers 0.000 claims description 8
- -1 polybutylene terephthalate Polymers 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000009941 weaving Methods 0.000 claims description 4
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000008397 galvanized steel Substances 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims 1
- 235000011613 Pinus brutia Nutrition 0.000 claims 1
- 241000018646 Pinus brutia Species 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 17
- 239000004033 plastic Substances 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000001125 extrusion Methods 0.000 description 9
- 238000005452 bending Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000004595 color masterbatch Substances 0.000 description 4
- 239000003086 colorant Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses a steel wire armor loose tube for optical cable. The steel wire armored loose tube of the utility model comprises an armored loose tube in which optical fibers are arranged, and fiber paste is filled between the armored loose tube and the optical fibers, wherein the armored loose tube is made of PBT; the armor loose tube comprises an inner layer loose tube and an outer layer loose tube; an armor layer is arranged between the inner loose tube and the outer loose tube, and the inner loose tube and the outer loose tube are tightly fused. The advantage of this device is that the side pressure resistance ability and the anti buckling performance of armor loose tube are high, and the shrink is little behind the sleeve pipe, and the excess length is stable, improves the side pressure resistance ability and the environmental performance of optical cable, guarantees the compliance of optical cable, improves the transmission stability and the reliability of optical cable.
Description
Technical Field
The utility model belongs to the technical field of optical fiber cable manufacturing and specifically relates to a steel wire armor loose tube.
Background
The conventional armored loose tube for an optical cable includes optical fibers, fiber paste and PBT, has no metal armor layer, and has low lateral pressure resistance and bending resistance. The armor loose tube is easy to flatten in the production and processing process, is easier to bend and is easy to break due to collision. The PBT material has certain post-shrinkage, the placement time is long, the shrinkage of the PBT can cause the surplus length to be increased, and the performance of the optical cable is unstable. In order to ensure a high lateral pressure resistance of the armoured loose tube, one method is to increase the wall thickness of the tube, resulting in a waste of material. The other method is to adopt novel materials such as nylon and the like, the raw materials are expensive, and the cost of the optical cable is high. In the production process of the OPGW optical cable, the stainless steel pipe type armored loose tube is adopted, and the stainless steel armored loose tube needs to be sleeved with special plastic production equipment, so that the price is high, the production speed is low, and the bending resistance of the stainless steel pipe is poor. In the manufacture of optical cables, in order to ensure lateral pressure resistance of the optical cable, the optical cable is generally armored in a covering step, and a metal tape is coated on the outer layer of the cable core, and the optical cable is widely used in a central tube type optical cable and a layer stranded type optical cable. For the anti side pressure performance and the environmental performance that improve the optical cable, improve the transmission stability and the reliability of optical cable, the utility model relates to a steel wire armor loose tube realizes steel wire spiral armor and the loose tube one shot forming's of armor mode at two sets of processes for improve the anti side pressure performance and the anti bending property of the loose tube of optical cable armor.
Disclosure of Invention
An object of the utility model is to provide a steel wire armor loose tube for optical cable, its anti side pressure performance is good with anti bending property, can be arranged in layer stranding formula and central tubular optical cable to and be arranged in the tape cable, improve the anti side performance of optical cable, guarantee the compliance of optical cable, improve the transmission stability and the reliability of optical cable.
A steel wire armor loose tube for optical cable, include:
the armor loose tube comprises an inner layer loose tube and an outer layer loose tube;
at least one optical fiber disposed within the armor loose tube; and
a fiber paste filling a gap between the at least one optical fiber and the armor loose tube;
the armor layer is arranged inside the armor loose sleeve and is of a metal wire arrangement structure.
The armor layer is arranged between the inner loose sleeve and the outer loose sleeve, and the inner loose sleeve and the outer loose sleeve are tightly fused.
The material of the armor loose tube is high molecular polymer, and the high molecular polymer of the armor loose tube is one of polybutylene terephthalate, modified polypropylene and modified polycarbonate; the metal wire arrangement structure is a steel wire weaving structure or a steel wire spiral structure which is regularly arranged.
The steel wires of the regularly arranged steel wire weaving structure or the steel wire spiral structure are one or a combination of stainless steel wires, galvanized steel wires or composite coating steel wires; the diameter of the steel wire is 0.1mm-0.3mm; the steel wire is one or a combination of a cylindrical shape and a flat shape.
And a gap between the at least one optical fiber and the armor loose tube can be filled with water blocking yarn or water blocking powder.
The optical fiber is loose fiber, band fiber or bunching fiber.
The expansion coefficient of the inner layer loose sleeve is alpha 1; the expansion coefficient of the outer layer loose sleeve is alpha 2, and alpha 1 is less than or equal to alpha 2; the pipe wall thickness of the inner loose sleeve is h1, the pipe wall thickness of the outer loose sleeve is h2, and h1 is less than or equal to h2.
The spiral pitch of the steel wire spiral structure is 1-3mm.
The manufacturing method of the steel wire armored loose tube for producing the optical cable comprises the following one-step forming:
1) Preparing an armored loose tube by a double-layer co-extrusion die of a plastic extruding machine, and sequentially passing the optical fiber and the steel wire for preparing an armored layer through an oil filling die and the double-layer co-extrusion die of the plastic extruding machine; filling fiber paste in the oil-filled filling mould; respectively filling an inner layer loose tube material and an outer layer loose tube material into a double-layer co-extrusion die of a plastic extruding machine for one-step forming to obtain a steel wire armored loose tube for the optical cable; the armor layer of the armor loose tube is embedded between the inner loose tube and the outer loose tube, the inner loose tube and the outer loose tube are tightly fused, and the inner loose tube and the outer loose tube are both high molecular polymers;
2) Filling fiber paste between the armor loose tube and the optical fiber by an oil filling and filling die, extruding by using a phi 65 extruder, and adding color master batch particles in a color master machine to realize armor loose tubes with different colors;
3) The optical fiber in the armored loose sleeve is a single-mode optical fiber, a multi-mode optical fiber or a ribbon fiber, and the paying-off tension of the optical fiber is 70g +/-20 g;
4) The diameter of a steel wire of the armor layer is 0.1mm, the steel wire passes through a steel wire spiral forming die, the diameter of the armor layer is 2.15mm, and the spiral pitch is controlled to be 2mm through stable paying-off tension and the production speed of the armor sleeve;
5) The double-layer co-extrusion die of the plastic extruding machine extrudes an armored loose tube with the inner diameter of 1.85 +/-0.05 mm and the outer diameter of 2.6 +/-0.05 mm at the outlet of the machine head; the armored loose tube sequentially passes through a hot water tank, a cold water tank, a traction drier, a blow drier and a take-up device;
6) The range of the extra length of the armor loose tube is-1 per mill to +1 per mill, the wall thickness is 0.35mm +/-0.05 mm, and the lateral pressure resistance strength of the armor loose tube is more than 2000N/mm 2 (ii) a The side pressure strength of the unarmored loose tube is more than 1000N/mm 2 。
The manufacturing method of the steel wire armored loose tube for producing the optical cable comprises the following step-by-step forming:
1) Wrapping an inner layer loose sleeve with the thickness of 0.17mm +/-0.05 mm on the outer surface of the optical fiber through a plastic extruding machine;
2) Filling fiber paste between the optical fiber and the inner-layer loose sleeve through an oil filling mold;
3) An armor layer is arranged outside the inner layer loose sleeve, the armor layer is a steel wire with phi of 0.1mm-0.3mm or a steel wire with phi of 0.1mm-0.3mm, the steel wire is pressed into a metal belt with the thickness of 0.1 mm-0.2 mm and the width of 0.1 mm-0.2 mm by a steel wire flatting mill, the steel wire or the metal belt is prepared into a tubular spiral structure with the diameter of 2.15mm by spiral stranding, and is uniformly arranged on the inner layer loose sleeve, the tubular spiral structure enhances the lateral pressure resistance, and the spiral pitch is 1 mm-3 mm;
4) And (3) coating an outer layer loose sleeve with the thickness of 0.17mm +/-0.05 mm on the outer surface of the armored cable core through a plastic extruding machine, and tightly fusing the inner layer loose sleeve and the outer layer loose sleeve sequentially through a hot water tank, a cold water tank, a traction drier and a wire take-up device to prepare the steel wire armored loose sleeve for the optical cable.
The manufacturing method of the steel wire armored loose tube for the optical cable comprises the following steps:
the paying-off tension of the optical fiber is 60g +/-10 g-70g +/-20 g;
the high molecular polymer is a PBT material;
the armor layer sequentially passes through the oil filling mould and the plastic extruding machine mould.
A steel wire armor loose tube for optical cable, its beneficial effect lies in: the side pressure resistance and the bending resistance of the armored loose tube are high, the back shrinkage of the tube is small, the extra length is stable, the side pressure resistance of the optical cable can be improved, the flexibility and the environmental performance of the optical cable are guaranteed, and the transmission stability and the reliability of the optical cable are improved.
Drawings
FIG. 1 is a cross-sectional view of a steel wire armored loose tube;
FIG. 2 is a radial cross-sectional view of an armored sleeve;
in the figure: 1-optical fiber, 2-fiber paste, 3-armor layer, 4-armor loose tube, 4-1 inner layer loose tube and 4-2 outer layer loose tube.
Detailed Description
Example 1
A steel wire armor loose tube for optical cable, include:
the armor loose tube 4 comprises an inner layer loose tube 4-1 and an outer layer loose tube 4-2;
at least one optical fiber 1, said at least one optical fiber 1 being placed inside said armoured loose tube 4; and
a fiber paste 2, wherein the fiber paste 2 is filled in a gap between the at least one optical fiber 1 and the armor loose tube 4;
and the armor layer 3 is arranged inside the armor loose sleeve and is of a metal wire arrangement structure.
The armor layer 3 is arranged between the inner layer loose sleeve 4-1 and the outer layer loose sleeve 4-2, and the inner layer loose sleeve 4-1 and the outer layer loose sleeve 4-2 are tightly fused.
The material of the armor loose tube 4 is high molecular polymer, and the high molecular polymer of the armor loose tube 4 is one of polybutylene terephthalate, modified polypropylene and modified polycarbonate; the armor layer 3 is a steel wire layer which is regularly arranged.
The regularly arranged steel wire layers are uniformly arranged between the inner loose sleeve 4-1 and the outer loose sleeve 4-2; the steel wires of the regularly arranged steel wire layer are one or a combination of stainless steel wires, galvanized steel wires or composite coating steel wires, and the diameter of each steel wire is 0.1mm-0.3mm; the steel wire is one or a combination of a cylinder shape and a flat shape.
The gap between the at least one optical fiber 1 and the armored loose tube 4 can be filled with water-blocking yarn or water-blocking powder.
The optical fiber 1 is a loose fiber, a band fiber or a bunching fiber.
The expansion coefficient of the inner layer loose sleeve 4-1 is alpha 1; the expansion coefficient of the outer layer loose sleeve 4-2 is alpha 2, and alpha 1 is less than or equal to alpha 2; the pipe wall thickness of the inner loose sleeve 4-1 is h1, the pipe wall thickness of the outer loose sleeve 4-2 is h2, and h1 is less than or equal to h2.
The spiral pitch of the steel wire spiral structure is 1-3mm.
Example 2
A method for manufacturing steel wire armored loose tube for optical cable, like embodiment 1, as shown in fig. 1 and 2, comprises the following steps:
1) Preparing an armored loose tube 4 by using a double-layer co-extrusion die of an extruding machine, sequentially passing the optical fiber 1 and a steel wire for preparing an armored layer 3 through an oil filling die and the double-layer co-extrusion die of the extruding machine, and respectively filling an inner layer loose tube material and an outer layer loose tube material in the double-layer co-extrusion die of the extruding machine for one-step forming to obtain the steel wire armored loose tube for the optical cable; the armor layer 3 of the armored loose tube 4 is embedded between the inner loose tube 4-1 and the outer loose tube 4-2, the inner loose tube 4-1 and the outer loose tube 4-2 are tightly fused, the inner loose tube 4-1 and the outer loose tube 4-2 are both high molecular polymers, and the inner loose tube 4-1 and the outer loose tube 4-2 in the obtained steel wire armored loose tube for the optical cable are made of different materials and have different expansion coefficients;
2) The oil-filled filling mold is used for filling the fiber paste 2 between the armor loose tube 4 and the optical fiber 1, a phi 65 extruding machine is used for extruding, and color master batch particles are added into a color master machine to realize the armor loose tubes 4 with different colors;
3) The optical fiber 1 in the armored loose tube 4 is a single mode optical fiber, a multimode optical fiber or a ribbon fiber, and the paying-off tension of the optical fiber 1 is 70g +/-20 g;
4) The diameter of the steel wire of the armor layer 4 is 0.1mm, the steel wire tubular spiral structure of the armor layer 3 with the diameter of 2.15mm passes through a steel wire spiral forming die, and the spiral pitch is controlled to be 2mm through stable paying-off tension and the production speed of the armor sleeve 4;
5) Extruding an armored loose tube 4 with the inner diameter of 1.85 +/-0.05 mm and the outer diameter of 2.6 +/-0.05 mm at the outlet of a machine head by a double-layer co-extrusion die of the plastic extruding machine; the armored loose tube 4 sequentially passes through a hot water tank, a cold water tank, a traction drier and a blow drier and a take-up device;
6) The length range of the armor loose tube 4 is-1 per mill to +1 per mill, the wall thickness is 0.35mm +/-0.05 mm, and the lateral pressure resistance strength of the armor loose tube 4 is more than 2000N/mm 2 (ii) a The side pressure resistance intensity of the non-armored loose tube is more than 800N/mm 2 。
Example 3
The utility model relates to a production steel wire armor loose tube's for optical cable manufacturing method, with embodiment 1, as shown in fig. 1, 2, including one shot forming as follows:
1) Preparing an armored loose tube 4 by using a plastic extruding machine mold, sequentially passing the optical fiber 1 and the steel wire for preparing the armored layer 3 through an oil filling mold and the plastic extruding machine mold, filling polybutylene terephthalate in the plastic extruding machine mold, and performing one-step molding to obtain the steel wire armored loose tube for the optical cable; the armor layer 3 of the armor loose tube 4 is embedded between the inner loose tube 4-1 and the outer loose tube 4-2, the inner loose tube 4-1 and the outer loose tube 4-2 are tightly fused, the inner loose tube 4-1 and the outer loose tube 4-2 are both high molecular polymers, and the inner loose tube 4-1 and the outer loose tube 4-2 in the steel wire armor loose tube for the optical cable are made of the same material and have the same expansion coefficient;
2) The fiber paste 2 is filled between the armored loose tube 4 and the optical fiber 1 by the oil filling and filling die, the extruding machine with phi 65 is used for extruding, and color master batch particles are added into the color master batch machine to realize the armored loose tubes 4 with different colors;
3) The optical fiber 1 in the armored loose tube 4 is a single mode optical fiber, a multimode optical fiber or a ribbon fiber, and the paying-off tension of the optical fiber 1 is 60g +/-10 g;
4) The diameter of the steel wire of the armor layer 4 is 0.1mm, the steel wire tubular spiral structure of the armor layer 3 with the diameter of 2.15mm passes through a steel wire spiral forming die, and the spiral pitch is controlled to be 2mm through stable paying-off tension and the production speed of the armor sleeve 4;
5) Extruding an armored loose tube 4 with the inner diameter of 1.85 +/-0.05 mm and the outer diameter of 2.6 +/-0.05 mm at the outlet of a machine head by a double-layer co-extrusion die of the plastic extruding machine; the armored loose tube 4 sequentially passes through a hot water tank, a cold water tank, a traction drier and a blow drier and a take-up device;
6) The length range of the armor loose tube 4 is-1 per mill to +1 per mill, the wall thickness is 0.35mm +/-0.05 mm, and the lateral pressure resistance strength of the armor loose tube 4 is more than 2000N/mm 2 (ii) a The side pressure strength of the unarmored loose tube is more than 1000N/mm 2 。
Example 4
The utility model relates to a production steel wire armor loose tube's for optical cable manufacturing method, with embodiment 1, as shown in fig. 1, 2, including the substep shaping as follows:
1) The optical fiber 1 is wrapped with an inner loose sleeve 4-1 with the thickness of 0.17mm +/-0.05 mm on the outer surface through an extruding machine, and the paying-off tension of the optical fiber is 60g +/-10 g;
2) Water-blocking yarns are filled between the optical fiber 1 and the inner-layer loose sleeve 4-1 through an oil-filling mould;
3) The armor layer 3 is arranged outside the inner layer loose tube, the armor layer 3 is a steel wire with phi of 0.1mm to 0.3mm, the steel wire is prepared into a tubular spiral structure with the diameter of 2.15mm through spiral stranding, and is uniformly arranged on the inner layer loose tube 4-1, the lateral pressure resistance of the tubular spiral structure is enhanced, and the spiral pitch of the tubular spiral structure is 2mm;
4) The armored cable core is wrapped with an outer loose sleeve 4-2 with the thickness of 0.17mm +/-0.05 mm by an extruding machine, the inner loose sleeve 4-1 and the outer loose sleeve 4-2 are sequentially and tightly fused through a hot water tank, a cold water tank, a traction drier and a take-up device, and the steel wire armored loose sleeve for the optical cable is prepared. The length range of the armor loose tube 4 is-1 per mill to +1 per mill, the wall thickness is 0.35mm +/-0.05 mm, and the lateral pressure resistance strength of the armor loose tube 4 is more than 2000N/mm 2 (ii) a The side pressure strength of the unarmored loose tube is more than 1000N/mm 2 。
Claims (8)
1. The utility model provides a steel wire armouring loose tube for optical cable which characterized in that includes:
the armor loose tube (4), the armor loose tube (4) comprises an inner layer loose tube (4-1) and an outer layer loose tube (4-2);
at least one optical fiber (1), said at least one optical fiber (1) being placed inside said armoured loose tube (4); and
a fiber paste (2), wherein the fiber paste (2) is filled in a gap between the at least one optical fiber (1) and the armor loose tube (4);
the armor layer (3), armor layer (3) set up in armor pine sleeve pipe (4) inside, it is the wire arrangement structure.
2. A steel wire-armored loose tube for optical cables as set forth in claim 1, wherein: the armor layer (3) is arranged between the inner loose sleeve (4-1) and the outer loose sleeve (4-2), and the inner loose sleeve (4-1) and the outer loose sleeve (4-2) are tightly fused.
3. A wire-armored loose tube for optical cables according to claim 2, wherein: the material of the armor loose tube (4) is high molecular polymer, and the high molecular polymer of the armor loose tube (4) is one of polybutylene terephthalate, modified polypropylene and modified polycarbonate; the metal wire arrangement structure is a steel wire weaving structure or a steel wire spiral structure which is regularly arranged.
4. A wire-armored loose tube for optical cables according to claim 3, wherein: the steel wires of the regularly arranged steel wire weaving structure or the steel wire spiral structure are one or a combination of stainless steel wires, galvanized steel wires or composite coating steel wires; the diameter of the steel wire is 0.1mm-0.3mm; the steel wire is one or a combination of a cylindrical shape and a flat shape.
5. The steel wire-armored loose tube for optical cables according to claim 4, wherein: and a gap between the at least one optical fiber (1) and the armor loose tube (4) can be filled with water-blocking yarn or water-blocking powder.
6. The steel wire-armored loose tube for optical cables according to claim 5, wherein: the optical fiber (1) is a loose fiber, a band fiber or a bunching fiber.
7. A steel wire-armored loose tube for optical cables as set forth in claim 1, wherein: the expansion coefficient of the inner layer loose sleeve (4-1) is alpha 1; the expansion coefficient of the outer layer loose sleeve (4-2) is alpha 2, and alpha 1 is less than or equal to alpha 2; the pipe wall thickness of the inner loose sleeve (4-1) is h1, the pipe wall thickness of the outer loose sleeve (4-2) is h2, and h1 is less than or equal to h2.
8. A steel wire-armored loose tube for optical cables as set forth in claim 4, wherein: the spiral pitch of the steel wire spiral structure is 1-3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221422459.7U CN218782448U (en) | 2022-06-06 | 2022-06-06 | Steel wire armored loose tube for optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221422459.7U CN218782448U (en) | 2022-06-06 | 2022-06-06 | Steel wire armored loose tube for optical cable |
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| Publication Number | Publication Date |
|---|---|
| CN218782448U true CN218782448U (en) | 2023-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221422459.7U Active CN218782448U (en) | 2022-06-06 | 2022-06-06 | Steel wire armored loose tube for optical cable |
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| Country | Link |
|---|---|
| CN (1) | CN218782448U (en) |
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2022
- 2022-06-06 CN CN202221422459.7U patent/CN218782448U/en active Active
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Effective date of registration: 20240508 Address after: No. 2 Chejian Road, Jiuli Town, Emeishan City, Leshan City, Sichuan Province, 614200 Patentee after: Sichuan Lefei Photoelectric Technology Co.,Ltd. Country or region after: China Address before: 730300 No.556 Shulehe street, Lanzhou New District, Yongdeng County, Lanzhou City, Gansu Province Patentee before: ZHANGFEI FIBER OPTIC CABLE LANZHOU CO.,LTD. Country or region before: China Patentee before: YANGTZE OPTICAL FIBRE AND CABLE JOINT STOCK Ltd. |