CN106950668A - A kind of central-beam tube type fiber optic cable and preparation method - Google Patents
A kind of central-beam tube type fiber optic cable and preparation method Download PDFInfo
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- CN106950668A CN106950668A CN201710315851.9A CN201710315851A CN106950668A CN 106950668 A CN106950668 A CN 106950668A CN 201710315851 A CN201710315851 A CN 201710315851A CN 106950668 A CN106950668 A CN 106950668A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
- G02B6/4432—Protective covering with fibre reinforcements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/441—Optical cables built up from sub-bundles
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4479—Manufacturing methods of optical cables
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/4486—Protective covering
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Communication Cables (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention belongs to technical field of cables; it is related to a kind of central-beam tube type fiber optic cable; it includes the Loose tube for enveloping multifiber, multi reinforcements, restrictive coating, it is characterised in that it also has the multiple protective layers for covering Loose tube surface, and protective layer is located between Loose tube and restrictive coating；Loose tube outer rim has multiple cylindrical grooves, and cylindrical groove is the whole wall body of not insertion Loose tube；Protective layer is made up of baseband layer and the water blocking layer sticked on baseband layer, there is concave column groove on water blocking layer, and water blocking layer is close to Loose tube and corresponding concave column groove and cylindrical groove formation hollow cylinder structure, and reinforcer is located in hollow cylinder structure.Present invention further teaches preparation method.The present invention have the diameter of reduction optical cable, reduce that space hold, structure are simpler, the Advantageous Effects such as to make more convenient, cost lower.
Description
The application is entitled：Central-beam tube type fiber optic cable and preparation method, Application No.：201510196322.2nd, apply
Day it is：The divisional application of the application for a patent for invention of on 04 23rd, 2015.
Technical field
The invention belongs to technical field of cables, more particularly, to a kind of central-beam tube type fiber optic cable and preparation method.
Background technology
People's Republic of China (PRC) communication industry standard YD/T769-2010 defines central tube type outdoor optical cable for communication
Technical requirements and recommendation structure.Wherein, GYXTW is metal strength members, central tube filled type, entrainment parallel steel wire
Steel-polyethylene bonding sheath outdoor optical cable for communication；B.1 clear stipulaties parallel steel wire is located at outside composite steel-plastic belt figure, warp
Cross applicant's repetition test, it is believed that this structure also has improved possibility, can reach that structure is simpler, external diameter is thinner,
Make the lower purpose of more convenient, cost.
The content of the invention
In order to solve the above problems, an object of the present invention is to disclose a kind of central-beam tube type fiber optic cable；The mesh of the present invention
Two be disclose a kind of preparation method of central-beam tube type fiber optic cable；They are realized using following technical scheme.
In embodiment 1 of the present invention, a kind of central-beam tube type fiber optic cable, it includes the pine set for enveloping multifiber
Pipe, multi reinforcements, restrictive coating, it is characterised in that it also has the multiple protective layers for covering Loose tube surface, protective layer
Between Loose tube and restrictive coating；Loose tube outer rim has multiple cylindrical grooves, and cylindrical groove is the whole of not insertion Loose tube
Individual wall body；Protective layer is made up of baseband layer and the water blocking layer sticked on baseband layer, is had concave column groove on water blocking layer, is blocked water
Layer is close to Loose tube and corresponding concave column groove and cylindrical groove formation hollow cylinder structure, and reinforcer is located at hollow cylinder knot
In structure；Water blocking layer is referred to as water blocking layer inner edge with Loose tube contact surface, and surface of the water blocking layer away from Loose tube is referred to as water blocking layer outer rim,
Surface of the baseband layer away from waterstop is referred to as baseband layer outer rim, on any cross section with Loose tube axis perpendicular：Block water
Layer inner edge is on same circumference, and the radius of water blocking layer inner edge is R1, and water blocking layer outer rim is on same circumference, and water blocking layer outer rim
Radius be R2, baseband layer outer rim is on same circumference, and the radius of baseband layer outer rim is R3, R3 ＞ R2 ＞ R1, and water blocking layer
The center of circle where inner edge, water blocking layer outer rim, baseband layer outer rim three is to overlap, and R3 and R2 difference are less than or equal to R2's and R1
Difference；The top edge of water blocking layer and the top edge of baseband layer on the same line, the lower edge of water blocking layer and baseband layer it is following
Edge is on the same line.
In embodiment 2 of the present invention, a kind of central-beam tube type fiber optic cable, it includes the pine set for enveloping multifiber
Pipe, multi reinforcements, restrictive coating, it is characterised in that it also has the multiple protective layers for covering Loose tube surface, protective layer
Between Loose tube and restrictive coating；Loose tube outer rim has multiple cylindrical grooves, and cylindrical groove is the whole of not insertion Loose tube
Individual wall body；Protective layer is made up of baseband layer and the water blocking layer sticked on baseband layer, is had concave column groove on water blocking layer, is blocked water
Layer is close to Loose tube and corresponding concave column groove and cylindrical groove formation hollow cylinder structure, and reinforcer is located at hollow cylinder knot
In structure；Water blocking layer is referred to as water blocking layer inner edge with Loose tube contact surface, and surface of the water blocking layer away from Loose tube is referred to as water blocking layer outer rim,
Surface of the baseband layer away from waterstop is referred to as baseband layer outer rim, on any cross section with Loose tube axis perpendicular：Block water
Layer inner edge is on same circumference, and the radius of water blocking layer inner edge is R1, and water blocking layer outer rim is on same circumference, and water blocking layer outer rim
Radius be R2, baseband layer outer rim is on same circumference, and the radius of baseband layer outer rim is R3, R3 ＞ R2 ＞ R1, and water blocking layer
The center of circle where inner edge, water blocking layer outer rim, baseband layer outer rim three is to overlap, and R3 and R2 difference are less than or equal to R2's and R1
Difference；The top edge of water blocking layer and the top edge of baseband layer not on the same line, the straight line ratio where the top edge of water blocking layer
Straight line where the top edge of baseband layer is further from concave column groove, and the lower edge of water blocking layer and the lower edge of baseband layer be not same
On straight line, straight line where the lower edge of water blocking layer is than the straight line where the lower edge of baseband layer further from concave column groove.
A kind of central-beam tube type fiber optic cable described in any of the above-described embodiment, it is characterised in that except light in the Loose tube
The material that blocks water is also filled with outside fine.
Further, a kind of central-beam tube type fiber optic cable described above, it is characterised in that the material that blocks water be ointment or
Water-proofing powder or water blocking yarn.
Further, a kind of central-beam tube type fiber optic cable described above, it is characterised in that the optical fiber in the Loose tube
And the material that blocks water accounts for more than the 98% of Loose tube inner space volume.
A kind of central-beam tube type fiber optic cable described in any of the above-described embodiment, it is characterised in that the reinforcer outer surface is applied
There are greasy for preventing water or reinforcer outer surface to be wound with water blocking yarn.
A kind of central-beam tube type fiber optic cable described in any of the above-described embodiment, it is characterised in that the optical fiber is G.652 type
G.653 type or G.654 type G.655 type or G.656 type or G.657 type or A1a types or A1b types or A1c types or A1d types or
OM1 types or OM2 types or OM3 types.
A kind of central-beam tube type fiber optic cable described in any of the above-described embodiment, it is characterised in that the material of the Loose tube is
Modified polypropene or polybutylene terephthalate (PBT).
A kind of central-beam tube type fiber optic cable described in any of the above-described embodiment, it is characterised in that the material of the restrictive coating is
Low-smoke non-halogen flame-retardant polyethylene or LLDPE or low density polyethylene (LDPE) or medium density polyethylene or high-density polyethylene
Alkene.
A kind of central-beam tube type fiber optic cable described in any of the above-described embodiment, it is characterised in that the material of the reinforcer is
Steel wire or copper wire or fiberglass reinforced plastics either composite, the composite refer to：Inside be steel wire or copper wire or
Fiberglass reinforced plastics, outside are plastics.
A kind of central-beam tube type fiber optic cable, it is characterised in that preparation method includes following steps：
The first step：The step of optical fiber coloring:Take G.652 type or G.653 type or G.654 type or G.655 type or G.656 type or
G.657 type or A1a types or A1b types or A1c types or A1d types or OM1 types or OM2 types or the naked optical fiber of OM3 types in optical fiber
UV solidification colorings are carried out on color machine, the thickness for making dyed layer is 1~3 μm, color solidification degree >=85%；It is repeated multiple times, form many
Optical fiber, the dyed layer of any two different optical fiber has different colors；
Second step：Loose tube forming step：Modified polypropene or polybutylene terephthalate (PBT) are taken in secondary coated extruding machine
Spiral shell chamber in melted and stirred；There is the original of cavity by the stretched inside of the extrusion head of secondary coated extruding machine
Beginning Loose tube, while the optical fiber that the first step is formed is penetrated in the cavity inside original Loose tube, drawing original Loose tube makes sky
Optical fiber in chamber is moved through 20~40 DEG C of bosh with original Loose tube, forms finished product Loose tube, finished product Loose tube
Outer rim extrusion molding be formed with multiple cylindrical grooves, cylindrical groove is the whole wall body of not insertion Loose tube；In finished product Loose tube
The length of optical fiber be 1.006~1.010 times of finished product Loose tube length；
3rd step：The step of placing reinforcer and protective layer：Take steel wire or copper wire or fiberglass reinforced plastics or compound
Material, the composite refers to：Inside is steel wire or copper wire or fiberglass reinforced plastics, outside are the reinforcers of plastics, puts
Enter into the cylindrical groove in the Loose tube of second step formation；Sheath of going bail for is coated on outside Loose tube by forming machine, wherein protecting
Sheath is made up of baseband layer and the water blocking layer sticked on baseband layer, has concave column groove on water blocking layer, and water blocking layer is close to loose set
Pipe and corresponding concave column groove and cylindrical groove formation hollow cylinder structure, make a part for reinforcer be located at hollow cylinder knot
In structure；Water blocking layer is referred to as water blocking layer inner edge with Loose tube contact surface, and surface of the water blocking layer away from Loose tube is referred to as water blocking layer outer rim,
Surface of the baseband layer away from waterstop is referred to as baseband layer outer rim, on any cross section with Loose tube axis perpendicular：Block water
Layer inner edge is on same circumference, and the radius of water blocking layer inner edge is R1, and water blocking layer outer rim is on same circumference, and water blocking layer outer rim
Radius be R2, baseband layer outer rim is on same circumference, and the radius of baseband layer outer rim is R3, R3 ＞ R2 ＞ R1, and water blocking layer
The center of circle where inner edge, water blocking layer outer rim, baseband layer outer rim three is to overlap, and R3 and R2 difference are less than or equal to R2's and R1
Difference；The top edge of water blocking layer and the top edge of baseband layer on the same line, the lower edge of water blocking layer and baseband layer it is following
Edge is on the same line；The material of the baseband layer is steel or aluminium；
4th step：Restrictive coating forming step：By low-smoke non-halogen flame-retardant polyethylene or LLDPE or low density polyethylene
Alkene or medium density polyethylene or high density polyethylene (HDPE) are coated on by sheath extruding machine extrusion molding outside the protective layer of the 3rd step formation,
Restrictive coating is formed, a kind of making of central-beam tube type fiber optic cable is completed.
Alternatively, a kind of central-beam tube type fiber optic cable, it is characterised in that preparation method includes following steps：
The first step：The step of optical fiber coloring:Take G.652 type or G.653 type or G.654 type or G.655 type or G.656 type or
G.657 type or A1a types or A1b types or A1c types or A1d types or OM1 types or OM2 types or the naked optical fiber of OM3 types in optical fiber
UV solidification colorings are carried out on color machine, the thickness for making dyed layer is 1~3 μm, color solidification degree >=85%；It is repeated multiple times, form many
Optical fiber, the dyed layer of any two different optical fiber has different colors；
Second step：Loose tube forming step：Modified polypropene or polybutylene terephthalate (PBT) are taken in secondary coated extruding machine
Spiral shell chamber in melted and stirred；There is the original of cavity by the stretched inside of the extrusion head of secondary coated extruding machine
Beginning Loose tube, while the optical fiber that the first step is formed is penetrated in the cavity inside original Loose tube, drawing original Loose tube makes sky
Optical fiber in chamber is moved through 20~40 DEG C of bosh with original Loose tube, forms finished product Loose tube, finished product Loose tube
Outer rim extrusion molding be formed with multiple cylindrical grooves, cylindrical groove is the whole wall body of not insertion Loose tube；In finished product Loose tube
The length of optical fiber be 1.006~1.010 times of finished product Loose tube length；
3rd step：The step of placing reinforcer and protective layer：Take steel wire or copper wire or fiberglass reinforced plastics or compound
Material, the composite refers to：Inside is steel wire or copper wire or fiberglass reinforced plastics, outside are the reinforcers of plastics, puts
Enter into the cylindrical groove in the Loose tube of second step formation；Sheath of going bail for is coated on outside Loose tube by forming machine, wherein protecting
Sheath is made up of baseband layer and the water blocking layer sticked on baseband layer, has concave column groove on water blocking layer, and water blocking layer is close to loose set
Pipe and corresponding concave column groove and cylindrical groove formation hollow cylinder structure, reinforcer are located in hollow cylinder structure；Block water
Layer is referred to as water blocking layer inner edge with Loose tube contact surface, and surface of the water blocking layer away from Loose tube is referred to as water blocking layer outer rim, and baseband layer is remote
Surface from waterstop is referred to as baseband layer outer rim, on any cross section with Loose tube axis perpendicular：Water blocking layer inner edge exists
On same circumference, and the radius of water blocking layer inner edge is R1, and water blocking layer outer rim is on same circumference, and the radius of water blocking layer outer rim is
R2, baseband layer outer rim is on same circumference, and the radius of baseband layer outer rim is R3, R3 ＞ R2 ＞ R1, and water blocking layer inner edge, blocks water
The center of circle where layer outer rim, baseband layer outer rim three is to overlap, and R3 and R2 difference are less than or equal to R2 and R1 difference；Block water
Not on the same line, the straight line where the top edge of water blocking layer is upper than baseband layer for the top edge of layer and the top edge of baseband layer
Straight line where edge further from concave column groove, the lower edge of water blocking layer and the lower edge of baseband layer not on the same line, resistance
Straight line where the lower edge of water layer is than the straight line where the lower edge of baseband layer further from concave column groove；The material of the baseband layer
Material is steel or aluminium；
4th step：Restrictive coating forming step：By low-smoke non-halogen flame-retardant polyethylene or LLDPE or low density polyethylene
Alkene or medium density polyethylene or high density polyethylene (HDPE) are coated on by sheath extruding machine extrusion molding outside the protective layer of the 3rd step formation,
Restrictive coating is formed, a kind of making of central-beam tube type fiber optic cable is completed.
Therefore, the present invention has the diameter of reduction optical cable, reduction space hold, structure is simpler, make more convenient, cost
Lower waits Advantageous Effects.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram after one section of stripping of embodiment 1 of the present invention.
Fig. 2 is the cross-sectional structure schematic diagram after Fig. 1 amplifies.
Fig. 3 is a kind of cross-sectional structure schematic diagram of the embodiment of intensive aspect used in Fig. 2.
Fig. 4 is the cross-sectional structure schematic diagram of the another embodiment of intensive aspect used in Fig. 2.
Cross-sectional structure schematic diagram when Fig. 5 is a kind of reset condition of reinforcer in Fig. 4.
Embodiment
Embodiment 1
See Fig. 1 to Fig. 3, a kind of central-beam tube type fiber optic cable, it include the Loose tube 1 for enveloping multifiber 2, many plus
Strong part 3, restrictive coating 5, it is characterised in that it also has the multiple protective layers 4 for covering Loose tube surface, protective layer is located at pine
Between sleeve pipe and restrictive coating；Loose tube outer rim has multiple cylindrical grooves 21, and cylindrical groove is the whole wall of not insertion Loose tube
Body；Protective layer is made up of baseband layer 42 and the water blocking layer 41 sticked on baseband layer, has concave column groove 411 on water blocking layer,
Water blocking layer is close to Loose tube and corresponding concave column groove and cylindrical groove formation hollow cylinder structure, and reinforcer is located at open circles
In rod structure；Water blocking layer is referred to as water blocking layer inner edge with Loose tube contact surface, and surface of the water blocking layer away from Loose tube is referred to as water blocking layer
Outer rim, surface of the baseband layer away from waterstop is referred to as baseband layer outer rim, on any cross section with Loose tube axis perpendicular：
Water blocking layer inner edge is on same circumference, and the radius of water blocking layer inner edge is R1, and water blocking layer outer rim is on same circumference, and water blocking layer
The radius of outer rim is R2, and baseband layer outer rim is on same circumference, and the radius of baseband layer outer rim is R3, R3 ＞ R2 ＞ R1, and hinders
The center of circle where water layer inner edge, water blocking layer outer rim, baseband layer outer rim three is to overlap, R3 and R2 difference be less than or equal to R2 with
R1 difference；The top edge of water blocking layer and the top edge of baseband layer on the same line, the lower edge of water blocking layer and baseband layer
Lower edge is on the same line.
A kind of central-beam tube type fiber optic cable described above, it is characterised in that preparation method includes following steps：
The first step：The step of optical fiber coloring:Take G.652 type or G.653 type or G.654 type or G.655 type or G.656 type or
G.657 type or A1a types or A1b types or A1c types or A1d types or OM1 types or OM2 types or the naked optical fiber of OM3 types in optical fiber
UV solidification colorings are carried out on color machine, the thickness for making dyed layer is 1~3 μm, color solidification degree >=85%；It is repeated multiple times, form many
Optical fiber, the dyed layer of any two different optical fiber has different colors；
Second step：Loose tube forming step：Modified polypropene or polybutylene terephthalate (PBT) are taken in secondary coated extruding machine
Spiral shell chamber in melted and stirred；There is the original of cavity by the stretched inside of the extrusion head of secondary coated extruding machine
Beginning Loose tube, while the optical fiber that the first step is formed is penetrated in the cavity inside original Loose tube, drawing original Loose tube makes sky
Optical fiber in chamber is moved through 20~40 DEG C of bosh with original Loose tube, forms finished product Loose tube, finished product Loose tube
Outer rim extrusion molding be formed with multiple cylindrical grooves, cylindrical groove is the whole wall body of not insertion Loose tube；In finished product Loose tube
The length of optical fiber be 1.006~1.010 times of finished product Loose tube length；
3rd step：The step of placing reinforcer and protective layer：Take steel wire or copper wire or fiberglass reinforced plastics or compound
Material, the composite refers to：Inside is steel wire or copper wire or fiberglass reinforced plastics, outside are the reinforcers of plastics, puts
Enter into the cylindrical groove in the Loose tube of second step formation；Sheath of going bail for is coated on outside Loose tube by forming machine, wherein protecting
Sheath is made up of baseband layer and the water blocking layer sticked on baseband layer, has concave column groove on water blocking layer, and water blocking layer is close to loose set
Pipe and corresponding concave column groove and cylindrical groove formation hollow cylinder structure, make a part for reinforcer be located at hollow cylinder knot
In structure；Water blocking layer is referred to as water blocking layer inner edge with Loose tube contact surface, and surface of the water blocking layer away from Loose tube is referred to as water blocking layer outer rim,
Surface of the baseband layer away from waterstop is referred to as baseband layer outer rim, on any cross section with Loose tube axis perpendicular：Block water
Layer inner edge is on same circumference, and the radius of water blocking layer inner edge is R1, and water blocking layer outer rim is on same circumference, and water blocking layer outer rim
Radius be R2, baseband layer outer rim is on same circumference, and the radius of baseband layer outer rim is R3, R3 ＞ R2 ＞ R1, and water blocking layer
The center of circle where inner edge, water blocking layer outer rim, baseband layer outer rim three is to overlap, and R3 and R2 difference are less than or equal to R2's and R1
Difference；The top edge of water blocking layer and the top edge of baseband layer on the same line, the lower edge of water blocking layer and baseband layer it is following
Edge is on the same line；The material of the baseband layer is steel or aluminium；
4th step：Restrictive coating forming step：By low-smoke non-halogen flame-retardant polyethylene or LLDPE or low density polyethylene
Alkene or medium density polyethylene or high density polyethylene (HDPE) are coated on by sheath extruding machine extrusion molding outside the protective layer of the 3rd step formation,
Restrictive coating is formed, a kind of making of central-beam tube type fiber optic cable is completed.
Embodiment 2
See Fig. 4 and Fig. 5, and refer to Fig. 1 and Fig. 2, a kind of central-beam tube type fiber optic cable, it, which includes, envelopes multifiber 2
Loose tube 1, multi reinforcements 3, restrictive coating 5, it is characterised in that it also has multiple protections for covering Loose tube surface
Layer 4, protective layer is located between Loose tube and restrictive coating；Loose tube outer rim has multiple cylindrical grooves 21, and cylindrical groove is not pass through
The whole wall body of logical Loose tube；Protective layer is made up of baseband layer 42 and the water blocking layer 41 sticked on baseband layer, on water blocking layer
With concave column groove 411, water blocking layer is close to Loose tube and corresponding concave column groove and cylindrical groove formation hollow cylinder structure,
Reinforcer is located in hollow cylinder structure；Water blocking layer is referred to as water blocking layer inner edge with Loose tube contact surface, and water blocking layer is away from Loose tube
Surface be referred to as water blocking layer outer rim, surface of the baseband layer away from waterstop is referred to as baseband layer outer rim, any with Loose tube axis
On perpendicular cross section：Water blocking layer inner edge is on same circumference, and the radius of water blocking layer inner edge is R1, and water blocking layer outer rim is same
On one circumference, and the radius of water blocking layer outer rim is R2, and baseband layer outer rim is on same circumference, and the radius of baseband layer outer rim is
R3, R3 ＞ R2 ＞ R1, and the center of circle where water blocking layer inner edge, water blocking layer outer rim, baseband layer outer rim three is to overlap, R3 and R2
Difference be less than or equal to R2 and R1 difference；The top edge of water blocking layer and the top edge of baseband layer on the same line, do not block water
Straight line where the top edge of layer than the straight line where the top edge of baseband layer further from concave column groove, the lower edge of water blocking layer with
Not on the same line, the straight line where the lower edge of water blocking layer is than straight where the lower edge of baseband layer for the lower edge of baseband layer
Line is further from concave column groove.
A kind of central-beam tube type fiber optic cable described above, it is characterised in that preparation method includes following steps：
The first step：The step of optical fiber coloring:Take G.652 type or G.653 type or G.654 type or G.655 type or G.656 type or
G.657 type or A1a types or A1b types or A1c types or A1d types or OM1 types or OM2 types or the naked optical fiber of OM3 types in optical fiber
UV solidification colorings are carried out on color machine, the thickness for making dyed layer is 1~3 μm, color solidification degree >=85%；It is repeated multiple times, form many
Optical fiber, the dyed layer of any two different optical fiber has different colors；
Second step：Loose tube forming step：Modified polypropene or polybutylene terephthalate (PBT) are taken in secondary coated extruding machine
Spiral shell chamber in melted and stirred；There is the original of cavity by the stretched inside of the extrusion head of secondary coated extruding machine
Beginning Loose tube, while the optical fiber that the first step is formed is penetrated in the cavity inside original Loose tube, drawing original Loose tube makes sky
Optical fiber in chamber is moved through 20~40 DEG C of bosh with original Loose tube, forms finished product Loose tube, finished product Loose tube
Outer rim extrusion molding be formed with multiple cylindrical grooves, cylindrical groove is the whole wall body of not insertion Loose tube；In finished product Loose tube
The length of optical fiber be 1.006~1.010 times of finished product Loose tube length；
3rd step：The step of placing reinforcer and protective layer：Take steel wire or copper wire or fiberglass reinforced plastics or compound
Material, the composite refers to：Inside is steel wire or copper wire or fiberglass reinforced plastics, outside are the reinforcers of plastics, puts
Enter into the cylindrical groove in the Loose tube of second step formation；Sheath of going bail for is coated on outside Loose tube by forming machine, wherein protecting
Sheath is made up of baseband layer and the water blocking layer sticked on baseband layer, has concave column groove on water blocking layer, and water blocking layer is close to loose set
Pipe and corresponding concave column groove and cylindrical groove formation hollow cylinder structure, reinforcer are located in hollow cylinder structure；Block water
Layer is referred to as water blocking layer inner edge with Loose tube contact surface, and surface of the water blocking layer away from Loose tube is referred to as water blocking layer outer rim, and baseband layer is remote
Surface from waterstop is referred to as baseband layer outer rim, on any cross section with Loose tube axis perpendicular：Water blocking layer inner edge exists
On same circumference, and the radius of water blocking layer inner edge is R1, and water blocking layer outer rim is on same circumference, and the radius of water blocking layer outer rim is
R2, baseband layer outer rim is on same circumference, and the radius of baseband layer outer rim is R3, R3 ＞ R2 ＞ R1, and water blocking layer inner edge, blocks water
The center of circle where layer outer rim, baseband layer outer rim three is to overlap, and R3 and R2 difference are less than or equal to R2 and R1 difference；Block water
Not on the same line, the straight line where the top edge of water blocking layer is upper than baseband layer for the top edge of layer and the top edge of baseband layer
Straight line where edge further from concave column groove, the lower edge of water blocking layer and the lower edge of baseband layer not on the same line, resistance
Straight line where the lower edge of water layer is than the straight line where the lower edge of baseband layer further from concave column groove；The material of the baseband layer
Material is steel or aluminium；
4th step：Restrictive coating forming step：By low-smoke non-halogen flame-retardant polyethylene or LLDPE or low density polyethylene
Alkene or medium density polyethylene or high density polyethylene (HDPE) are coated on by sheath extruding machine extrusion molding outside the protective layer of the 3rd step formation,
Restrictive coating is formed, a kind of making of central-beam tube type fiber optic cable is completed.
A kind of central-beam tube type fiber optic cable described in any of the above-described embodiment, it is characterised in that except light in the Loose tube
The material that blocks water is also filled with outside fine.
Further, a kind of central-beam tube type fiber optic cable described above, it is characterised in that the material that blocks water be ointment or
Water-proofing powder or water blocking yarn.
Further, a kind of central-beam tube type fiber optic cable described above, it is characterised in that the optical fiber in the Loose tube
And the material that blocks water accounts for more than the 98% of Loose tube inner space volume.
A kind of central-beam tube type fiber optic cable described in any of the above-described embodiment, it is characterised in that the reinforcer outer surface is applied
There are greasy for preventing water or reinforcer outer surface to be wound with water blocking yarn.
A kind of central-beam tube type fiber optic cable described in any of the above-described embodiment, it is characterised in that the optical fiber is G.652 type
G.653 type or G.654 type G.655 type or G.656 type or G.657 type or A1a types or A1b types or A1c types or A1d types or
OM1 types or OM2 types or OM3 types.
A kind of central-beam tube type fiber optic cable described in any of the above-described embodiment, it is characterised in that the material of the Loose tube is
Modified polypropene or polybutylene terephthalate (PBT).
A kind of central-beam tube type fiber optic cable described in any of the above-described embodiment, it is characterised in that the material of the restrictive coating is
Low-smoke non-halogen flame-retardant polyethylene or LLDPE or low density polyethylene (LDPE) or medium density polyethylene or high-density polyethylene
Alkene.
A kind of central-beam tube type fiber optic cable described in any of the above-described embodiment, it is characterised in that the material of the reinforcer is
Steel wire or copper wire or fiberglass reinforced plastics either composite, the composite refer to：Inside be steel wire or copper wire or
Fiberglass reinforced plastics, outside are plastics.
In the present invention, because a part for reinforcer is located in Loose tube wall body, therefore ensureing the load performance of optical cable
Meanwhile, the diameter of optical cable can be effectively reduced, reaches that structure simpler, external diameter is thinner, make the lower mesh of more convenient, cost
's；Equally it is the optical cable of 12 cores, external diameter, which can reduce by 15%, weight, can reduce 18%, and cost can reduce by 12%, life through measuring and calculating
Production speed can improve 25%.
In the present invention, reinforcer is that composite refers to：Inside is steel wire or copper wire or fiberglass reinforced plastics, outside are
Plastics；Reinforcer is effectively bonded with Loose tube and water blocking layer, reach the purpose of cable configuration integration.
In a kind of preparation method second step of central-beam tube type fiber optic cable described above, reinforcer first can be passed through into ointment
Or in winding, then reinforcer is placed in the cylindrical groove in the Loose tube of second step formation again.
In embodiment 2 of the present invention, the top edge of water blocking layer and the top edge of baseband layer not on the same line, water blocking layer
Top edge where straight line than the straight line where the top edge of baseband layer further from concave column groove, the lower edge and base of water blocking layer
Not on the same line, the straight line where the lower edge of water blocking layer is than the straight line where the lower edge of baseband layer for the lower edge of belt
Further from concave column groove；Such structure makes the length of baseband layer be less than the length of water blocking layer, can more save the material of baseband layer
Material, simultaneously because baseband layer has higher intensity and hardness, therefore can effectively act as strengthening the effect that optical cable bears pulling force
And with the effect being stressed.
The preparation method of the present invention is simply easy to grasp, speed of production faster, it is more efficient, can more save hydroelectric power and people
The expenses such as work cost, depreciation of machinery.
Therefore, the present invention has the diameter of reduction optical cable, reduction space hold, structure is simpler, make more convenient, cost
Lower waits Advantageous Effects.
The present invention is not limited to above-mentioned preferred forms, it will be appreciated that design of the invention can be by other a variety of shapes
Formula is implemented to use, and they are also fallen within protection scope of the present invention.
Claims (5)
1. a kind of central-beam tube type fiber optic cable, it includes the Loose tube for enveloping multifiber, multi reinforcements, restrictive coating,
It is characterized in that it also has multiple protective layers for covering Loose tube surface, protective layer be located at Loose tube and restrictive coating it
Between；Loose tube outer rim has multiple cylindrical grooves, and cylindrical groove is the whole wall body of not insertion Loose tube；Protective layer is by base band
Layer and the water blocking layer sticked on baseband layer are constituted, and have concave column groove on water blocking layer, water blocking layer is close to Loose tube and corresponding
Concave column groove and cylindrical groove formation hollow cylinder structure, reinforcer is located in hollow cylinder structure；Water blocking layer and Loose tube
Contact surface is referred to as water blocking layer inner edge, and surface of the water blocking layer away from Loose tube is referred to as water blocking layer outer rim, and baseband layer is away from waterstop
Surface is referred to as baseband layer outer rim, on any cross section with Loose tube axis perpendicular：Water blocking layer inner edge on same circumference,
And the radius of water blocking layer inner edge is R1, water blocking layer outer rim is on same circumference, and the radius of water blocking layer outer rim is outside R2, baseband layer
Edge is on same circumference, and the radius of baseband layer outer rim is R3, R3 ＞ R2 ＞ R1, and water blocking layer inner edge, water blocking layer outer rim, base band
The center of circle where layer outer rim three is to overlap, and R3 and R2 difference are less than or equal to R2 and R1 difference；The top edge of water blocking layer
With the top edge of baseband layer not on the same line, the straight line where the top edge of water blocking layer is than where the top edge of baseband layer
Straight line further from concave column groove, the lower edge of water blocking layer and the lower edge of baseband layer not on the same line, water blocking layer it is following
Straight line where edge is than the straight line where the lower edge of baseband layer further from concave column groove.
2. central-beam tube type fiber optic cable according to claim 1, it is characterised in that the optical fiber is G.652 type or G.653 type
Or G.654 type or G.655 type or G.656 type or G.657 type or A1a types or A1b types or A1c types or A1d types or OM1 types or OM2
Type or OM3 types.
3. central-beam tube type fiber optic cable according to claim 2, it is characterised in that the material of the Loose tube is modified poly- third
Alkene or polybutylene terephthalate (PBT)；The material of the restrictive coating be low-smoke non-halogen flame-retardant polyethylene or low density polyethylene (LDPE) or
Medium density polyethylene or high density polyethylene (HDPE)；The material of the reinforcer be steel wire or copper wire or fiberglass reinforced plastics or
It is composite, the composite refers to：Inside is steel wire or copper wire or fiberglass reinforced plastics, outside are plastics.
4. a kind of preparation method of central-beam tube type fiber optic cable, it is characterised in that include following steps：
The first step：The step of optical fiber coloring:Take G.652 type or G.653 type or G.654 type or G.655 type or G.656 type or
G.657 type or A1a types or A1b types or A1c types or A1d types or OM1 types or OM2 types or the naked optical fiber of OM3 types in optical fiber
UV solidification colorings are carried out on color machine, the thickness for making dyed layer is 1~3 μm, color solidification degree >=85%；It is repeated multiple times, form many
Optical fiber, the dyed layer of any two different optical fiber has different colors；
Second step：Loose tube forming step：Modified polypropene or polybutylene terephthalate (PBT) are taken in secondary coated extruding machine
Spiral shell chamber in melted and stirred；There is the original of cavity by the stretched inside of the extrusion head of secondary coated extruding machine
Beginning Loose tube, while the optical fiber that the first step is formed is penetrated in the cavity inside original Loose tube, drawing original Loose tube makes sky
Optical fiber in chamber is moved through 20~40 DEG C of bosh with original Loose tube, forms finished product Loose tube, finished product Loose tube
Outer rim extrusion molding be formed with multiple cylindrical grooves, cylindrical groove is the whole wall body of not insertion Loose tube；In finished product Loose tube
The length of optical fiber be 1.006~1.010 times of finished product Loose tube length；
3rd step：The step of placing reinforcer and protective layer：Take steel wire or copper wire or fiberglass reinforced plastics or compound
Material, the composite refers to：Inside is steel wire or copper wire or fiberglass reinforced plastics, outside are the reinforcers of plastics, puts
Enter into the cylindrical groove in the Loose tube of second step formation；Sheath of going bail for is coated on outside Loose tube by forming machine, wherein protecting
Sheath is made up of baseband layer and the water blocking layer sticked on baseband layer, has concave column groove on water blocking layer, and water blocking layer is close to loose set
Pipe and corresponding concave column groove and cylindrical groove formation hollow cylinder structure, reinforcer are located in hollow cylinder structure；Block water
Layer is referred to as water blocking layer inner edge with Loose tube contact surface, and surface of the water blocking layer away from Loose tube is referred to as water blocking layer outer rim, and baseband layer is remote
Surface from waterstop is referred to as baseband layer outer rim, on any cross section with Loose tube axis perpendicular：Water blocking layer inner edge exists
On same circumference, and the radius of water blocking layer inner edge is R1, and water blocking layer outer rim is on same circumference, and the radius of water blocking layer outer rim is
R2, baseband layer outer rim is on same circumference, and the radius of baseband layer outer rim is R3, R3 ＞ R2 ＞ R1, and water blocking layer inner edge, blocks water
The center of circle where layer outer rim, baseband layer outer rim three is to overlap, and R3 and R2 difference are less than or equal to R2 and R1 difference；Block water
Not on the same line, the straight line where the top edge of water blocking layer is upper than baseband layer for the top edge of layer and the top edge of baseband layer
Straight line where edge further from concave column groove, the lower edge of water blocking layer and the lower edge of baseband layer not on the same line, resistance
Straight line where the lower edge of water layer is than the straight line where the lower edge of baseband layer further from concave column groove；The material of the baseband layer
Material is steel or aluminium；
4th step：Restrictive coating forming step：By low-smoke non-halogen flame-retardant polyethylene or low density polyethylene (LDPE) or medium density polyethylene or
High density polyethylene (HDPE) is coated on by sheath extruding machine extrusion molding outside the protective layer of the 3rd step formation, is formed restrictive coating, is completed
A kind of making of central-beam tube type fiber optic cable.
5. a kind of preparation method of central-beam tube type fiber optic cable, it is characterised in that include following steps：
The first step：The step of optical fiber coloring:Take G.652 type or G.653 type or G.654 type or G.655 type or G.656 type or
G.657 type or A1a types or A1b types or A1c types or A1d types or OM1 types or OM2 types or the naked optical fiber of OM3 types in optical fiber
UV solidification colorings are carried out on color machine, the thickness for making dyed layer is 1~3 μm, color solidification degree >=85%；It is repeated multiple times, form many
Optical fiber, the dyed layer of any two different optical fiber has different colors；
Second step：Loose tube forming step：Modified polypropene or polybutylene terephthalate (PBT) are taken in secondary coated extruding machine
Spiral shell chamber in melted and stirred；There is the original of cavity by the stretched inside of the extrusion head of secondary coated extruding machine
Beginning Loose tube, while the optical fiber that the first step is formed is penetrated in the cavity inside original Loose tube, drawing original Loose tube makes sky
Optical fiber in chamber is moved through 20~40 DEG C of bosh with original Loose tube, forms finished product Loose tube, finished product Loose tube
Outer rim extrusion molding be formed with multiple cylindrical grooves, cylindrical groove is the whole wall body of not insertion Loose tube；In finished product Loose tube
The length of optical fiber be 1.006~1.010 times of finished product Loose tube length；
3rd step：The step of placing reinforcer and protective layer：Take steel wire or copper wire or fiberglass reinforced plastics or compound
Material, the composite refers to：Inside is steel wire or copper wire or fiberglass reinforced plastics, outside are the reinforcers of plastics, puts
Enter into the cylindrical groove in the Loose tube of second step formation；Sheath of going bail for is coated on outside Loose tube by forming machine, wherein protecting
Sheath is made up of baseband layer and the water blocking layer sticked on baseband layer, has concave column groove on water blocking layer, and water blocking layer is close to loose set
Pipe and corresponding concave column groove and cylindrical groove formation hollow cylinder structure, reinforcer are located in hollow cylinder structure；Block water
Layer is referred to as water blocking layer inner edge with Loose tube contact surface, and surface of the water blocking layer away from Loose tube is referred to as water blocking layer outer rim, and baseband layer is remote
Surface from waterstop is referred to as baseband layer outer rim, on any cross section with Loose tube axis perpendicular：Water blocking layer inner edge exists
On same circumference, and the radius of water blocking layer inner edge is R1, and water blocking layer outer rim is on same circumference, and the radius of water blocking layer outer rim is
R2, baseband layer outer rim is on same circumference, and the radius of baseband layer outer rim is R3, R3 ＞ R2 ＞ R1, and water blocking layer inner edge, blocks water
The center of circle where layer outer rim, baseband layer outer rim three is to overlap, and R3 and R2 difference are less than or equal to R2 and R1 difference；Block water
Not on the same line, the straight line where the top edge of water blocking layer is upper than baseband layer for the top edge of layer and the top edge of baseband layer
Straight line where edge further from concave column groove, the lower edge of water blocking layer and the lower edge of baseband layer not on the same line, resistance
Straight line where the lower edge of water layer is than the straight line where the lower edge of baseband layer further from concave column groove；The baseband layer
Material is steel or aluminium；
4th step：Restrictive coating forming step：LLDPE is coated on the 3rd step shape by sheath extruding machine extrusion molding
Into protective layer outside, formed restrictive coating, complete a kind of making of central-beam tube type fiber optic cable.
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| CN105929503B (en) * | 2016-06-12 | 2022-10-28 | 中国电子科技集团公司第八研究所 | Loose-sleeve lapping reinforced buffer type flexible irradiation-resistant optical cable and manufacturing method thereof |
| CN107561659A (en) * | 2017-09-29 | 2018-01-09 | 烽火通信科技股份有限公司 | A kind of skeleton Loose tube |
| CN107942454A (en) * | 2017-11-20 | 2018-04-20 | 广东中天科技光缆有限公司 | A kind of center type optical cable production technology |
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Also Published As
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| CN106950669B (en) | 2019-07-16 |
| CN106950669A (en) | 2017-07-14 |
| CN104793305A (en) | 2015-07-22 |
| CN106950667A (en) | 2017-07-14 |
| CN104793305B (en) | 2018-01-30 |
| CN106950667B (en) | 2019-07-05 |
| CN106950668B (en) | 2019-10-18 |
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