CN106950669B - Central-beam tube type fiber optic cable and production method - Google Patents
Central-beam tube type fiber optic cable and production method Download PDFInfo
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- CN106950669B CN106950669B CN201710315852.3A CN201710315852A CN106950669B CN 106950669 B CN106950669 B CN 106950669B CN 201710315852 A CN201710315852 A CN 201710315852A CN 106950669 B CN106950669 B CN 106950669B
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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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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Communication Cables (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention belongs to technical field of cables; it is related to central-beam tube type fiber optic cable; it includes the Loose tube, multi reinforcements, restrictive coating for enveloping multifiber, it is characterised in that it is there are also the multiple protective layers for covering Loose tube surface, and protective layer is between Loose tube and restrictive coating；Loose tube outer rim has multiple cylindrical grooves, and cylindrical groove is the entire wall body for not penetrating through Loose tube；Protective layer is made of baseband layer and the water blocking layer being adhered on baseband layer, has concave column slot on water blocking layer, water blocking layer is close to Loose tube and corresponding concave column slot and cylindrical groove form hollow cylinder structure, and reinforcer is located in hollow cylinder structure.Present invention further teaches production methods.The present invention has the diameter for reducing optical cable, reduces the advantageous effects such as space hold, structure are simpler, production is more convenient, cost is lower.
Description
The application is title are as follows: central-beam tube type fiber optic cable and production method, application No. is: 201510196322.2, apply
Day are as follows: the divisional application of application for a patent for invention on 04 23rd, 2015.
Technical field
The invention belongs to technical field of cables, more particularly, to central-beam tube type fiber optic cable and production method.
Background technique
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 except composite steel-plastic belt figure, warp
Cross applicant's repetition test, it is believed that this structure there is also improving, can achieve structure is simpler, outer diameter is thinner,
Make more convenient, the lower purpose of cost.
Summary of the invention
To solve the above-mentioned problems, an object of the present invention is to disclose a kind of central-beam tube type fiber optic cable；Mesh of the invention
Second is that the production method for disclosing the central-beam tube type fiber optic cable；They adopt the following technical solutions to realize.
In embodiment 1 of the present invention, central-beam tube type fiber optic cable, it includes the Loose tube for enveloping multifiber, more
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 at pine
Between casing and restrictive coating；Loose tube outer rim has multiple cylindrical grooves, and cylindrical groove is the entire wall body for not penetrating through Loose tube
's；Protective layer is made of baseband layer and the water blocking layer being adhered on baseband layer, has concave column slot on water blocking layer, and water blocking layer is close to
Loose tube and corresponding concave column slot and cylindrical groove form hollow cylinder structure, and reinforcer is located in hollow cylinder structure；
Water blocking layer and Loose tube contact surface are known as water blocking layer inner edge, and water blocking layer is known as water blocking layer outer rim, base band far from the surface of Loose tube
Layer is known as baseband layer outer rim far from the surface of waterstop, on any cross section with Loose tube axis perpendicular: in water blocking layer
On the same circumference, and the radius of water blocking layer inner edge is R1 to edge, water blocking layer outer rim on the same circumference, and the half of water blocking layer outer rim
Diameter is R2, and on the same circumference, and the radius of baseband layer outer rim is R3, R3 > R2 > R1 to baseband layer outer rim, and water blocking layer inner edge,
The center of circle where water blocking layer outer rim, baseband layer outer rim three is to be overlapped, and the difference of R3 and R2 are less than or equal to the difference of R2 and R1；
Not on the same circumference, the lower edge of the lower edge of water blocking layer and baseband layer is or not the top edge of water blocking layer and the top edge of baseband layer
On the same circumference.
In embodiment 2 of the present invention, central-beam tube type fiber optic cable, it includes the Loose tube for enveloping multifiber, more
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 at pine
Between casing and restrictive coating；Loose tube outer rim has multiple cylindrical grooves, and cylindrical groove is the entire wall body for not penetrating through Loose tube
's；Protective layer is made of baseband layer and the water blocking layer being adhered on baseband layer, has concave column slot on water blocking layer, and water blocking layer is close to
Loose tube and corresponding concave column slot and cylindrical groove form hollow cylinder structure, and reinforcer is located in hollow cylinder structure；
Water blocking layer and Loose tube contact surface are known as water blocking layer inner edge, and water blocking layer is known as water blocking layer outer rim, base band far from the surface of Loose tube
Layer is known as baseband layer outer rim far from the surface of waterstop, on any cross section with Loose tube axis perpendicular: in water blocking layer
On the same circumference, and the radius of water blocking layer inner edge is R1 to edge, water blocking layer outer rim on the same circumference, and the half of water blocking layer outer rim
Diameter is R2, and on the same circumference, and the radius of baseband layer outer rim is R3, R3 > R2 > R1 to baseband layer outer rim, and water blocking layer inner edge,
The center of circle where water blocking layer outer rim, baseband layer outer rim three is to be overlapped, and the difference of R3 and R2 are less than or equal to the difference of R2 and R1；
Not on the same circumference, the circumference where the top edge of water blocking layer compares baseband layer for the top edge of water blocking layer and the top edge of baseband layer
Top edge where circumference further from concave column slot, the lower edge of water blocking layer and the lower edge of baseband layer be not in same circumference
On, circumference where the lower edge of water blocking layer is than the circumference where the lower edge of baseband layer further from concave column slot.
Central-beam tube type fiber optic cable described in any of the above-described embodiment, it is characterised in that in the Loose tube other than optical fiber
It is also filled with the substance that blocks water.
Further, central-beam tube type fiber optic cable described above, it is characterised in that the substance that blocks water is ointment or blocks water
Powder or water blocking yarn.
Further, central-beam tube type fiber optic cable described above, it is characterised in that optical fiber and resistance in the Loose tube
Water substance accounts for 98% or more of Loose tube inner space volume.
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 coated with resistance
Water ointment or reinforcer outer surface are wound with water blocking yarn.
Central-beam tube type fiber optic cable described in any of the above-described embodiment, it is characterised in that the optical fiber be 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 type or A1b type or A1c type or A1d type or OM1
Type or OM2 type or OM3 type.
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
Polypropylene or polybutylene terephthalate (PBT).
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 cigarette
Zero halogen flame resistance polyethylene or linear low density polyethylene or low density polyethylene (LDPE) or medium density polyethylene or high density polyethylene (HDPE).
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 material, the composite material refer to: inside is steel wire or copper wire or glass
Fibre reinforced plastics, outside are plastics.
Central-beam tube type fiber optic cable, it is characterised in that production method includes following steps:
Step 1: 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 the naked optical fiber of A1a type or A1b type or A1c type or A1d type or OM1 type or OM2 type or OM3 type are in optical fiber
On color machine carry out UV solidification coloring, make coloring layer with a thickness of 1~3 μm, color solidification degree >=85%；It is repeated multiple times, form more
The coloring layer of optical fiber, any two different optical fiber has different colors；
Step 2: Loose tube forming step: modified polypropene or polybutylene terephthalate (PBT) being taken to squeeze secondary coated
Melted and stirred evenly in the spiral shell chamber of molding machine；There is cavity by the stretched inside of the extrusion head of secondary coated extruding machine
Original Loose tube, while by the first step formed optical fiber penetrate in the cavity inside original Loose tube, draw original Loose tube
So that the optical fiber in cavity was moved together 20~40 DEG C of cooling trough with original Loose tube, forms finished product Loose tube, finished product pine
The outer rim extrusion molding of casing is formed with multiple cylindrical grooves, and cylindrical groove is the entire wall body for not penetrating through Loose tube；Finished product pine set
The length of optical fiber in pipe is 1.006~1.010 times of finished product Loose tube length；
Step 3: the step of placing reinforcer and protective layer: taking steel wire or copper wire or fiberglass reinforced plastics either
Composite material, the composite material refer to: inside is steel wire or copper wire or fiberglass reinforced plastics, outside are the reinforcements of plastics
Part is placed in 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,
Middle protective layer is made of baseband layer and the water blocking layer being adhered on baseband layer, has concave column slot on water blocking layer, and water blocking layer is close to
Loose tube and corresponding concave column slot and cylindrical groove form hollow cylinder structure, and a part of reinforcer is made to be located at open circles
In rod structure；Water blocking layer and Loose tube contact surface are known as water blocking layer inner edge, and water blocking layer is known as water blocking layer far from the surface of Loose tube
Outer rim, baseband layer are known as baseband layer outer rim far from the surface of waterstop, on any cross section with Loose tube axis perpendicular:
On the same circumference, and the radius of water blocking layer inner edge is R1 for water blocking layer inner edge, water blocking layer outer rim on the same circumference, and water blocking layer
The radius of outer rim be R2, baseband layer outer rim on the same circumference, and the radius of baseband layer outer rim be R3, R3 > R2 > R1, and hinder
The center of circle where water layer inner edge, water blocking layer outer rim, baseband layer outer rim three is to be overlapped, the difference of R3 and R2 be less than or equal to R2 with
The difference of R1；The top edge of water blocking layer and the top edge of baseband layer not on the same circumference, the lower edge and baseband layer of water blocking layer
Lower edge not on the same circumference；The material of the baseband layer is steel or aluminium；
Step 4: restrictive coating forming step: by low-smoke non-halogen flame-retardant polyethylene or linear low density polyethylene or low-density
Polyethylene or medium density polyethylene or high density polyethylene (HDPE) are coated on the protective layer of third step formation by sheath extruding machine extrusion molding
Except, restrictive coating is formed, the production of central-beam tube type fiber optic cable is completed.
Alternatively, central-beam tube type fiber optic cable, it is characterised in that production method includes following steps:
Step 1: 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 the naked optical fiber of A1a type or A1b type or A1c type or A1d type or OM1 type or OM2 type or OM3 type are in optical fiber
On color machine carry out UV solidification coloring, make coloring layer with a thickness of 1~3 μm, color solidification degree >=85%；It is repeated multiple times, form more
The coloring layer of optical fiber, any two different optical fiber has different colors；
Step 2: Loose tube forming step: modified polypropene or polybutylene terephthalate (PBT) being taken to squeeze secondary coated
Melted and stirred evenly in the spiral shell chamber of molding machine；There is cavity by the stretched inside of the extrusion head of secondary coated extruding machine
Original Loose tube, while by the first step formed optical fiber penetrate in the cavity inside original Loose tube, draw original Loose tube
So that the optical fiber in cavity was moved together 20~40 DEG C of cooling trough with original Loose tube, forms finished product Loose tube, finished product pine
The outer rim extrusion molding of casing is formed with multiple cylindrical grooves, and cylindrical groove is the entire wall body for not penetrating through Loose tube；Finished product pine set
The length of optical fiber in pipe is 1.006~1.010 times of finished product Loose tube length；
Step 3: the step of placing reinforcer and protective layer: taking steel wire or copper wire or fiberglass reinforced plastics either
Composite material, the composite material refer to: inside is steel wire or copper wire or fiberglass reinforced plastics, outside are the reinforcements of plastics
Part is placed in 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,
Middle protective layer is made of baseband layer and the water blocking layer being adhered on baseband layer, has concave column slot on water blocking layer, and water blocking layer is close to
Loose tube and corresponding concave column slot and cylindrical groove form hollow cylinder structure, and reinforcer is located in hollow cylinder structure；
Water blocking layer and Loose tube contact surface are known as water blocking layer inner edge, and water blocking layer is known as water blocking layer outer rim, base band far from the surface of Loose tube
Layer is known as baseband layer outer rim far from the surface of waterstop, on any cross section with Loose tube axis perpendicular: in water blocking layer
On the same circumference, and the radius of water blocking layer inner edge is R1 to edge, water blocking layer outer rim on the same circumference, and the half of water blocking layer outer rim
Diameter is R2, and on the same circumference, and the radius of baseband layer outer rim is R3, R3 > R2 > R1 to baseband layer outer rim, and water blocking layer inner edge,
The center of circle where water blocking layer outer rim, baseband layer outer rim three is to be overlapped, and the difference of R3 and R2 are less than or equal to the difference of R2 and R1；
Not on the same circumference, the circumference where the top edge of water blocking layer compares baseband layer for the top edge of water blocking layer and the top edge of baseband layer
Top edge where circumference further from concave column slot, the lower edge of water blocking layer and the lower edge of baseband layer be not in same circumference
On, circumference where the lower edge of water blocking layer is than the circumference where the lower edge of baseband layer further from concave column slot；The base band
The material of layer is steel or aluminium；
Step 4: restrictive coating forming step: by low-smoke non-halogen flame-retardant polyethylene or linear low density polyethylene or low-density
Polyethylene or medium density polyethylene or high density polyethylene (HDPE) are coated on the protective layer of third step formation by sheath extruding machine extrusion molding
Except, restrictive coating is formed, the production of central-beam tube type fiber optic cable is completed.
Therefore, the present invention has the diameter for reducing optical cable, reduces that space hold, structure are simpler, production is more convenient, cost
Lower equal advantageous effects.
Detailed description of the invention
Fig. 1 is the schematic perspective view after one section of stripping of embodiment 1 of the present invention.
Fig. 2 is the amplified cross-sectional structure schematic diagram of Fig. 1.
Fig. 3 is a kind of cross-sectional structure schematic diagram of 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.
Specific embodiment
Embodiment 1
See Fig. 1 to Fig. 3, central-beam tube type fiber optic cable, it includes Loose tube 1, the Duo Genjia for enveloping multifiber 2
Strong part 3, restrictive coating 5, it is characterised in that it also has the multiple protective layers 4 for covering Loose tube surface, and protective layer is located at pine
Between casing and restrictive coating；Loose tube outer rim has multiple cylindrical grooves 21, and cylindrical groove is the entire wall for not penetrating through Loose tube
Body；Protective layer is made of baseband layer 42 and the water blocking layer being adhered on baseband layer 41, has concave column slot 411 on water blocking layer,
Water blocking layer is close to Loose tube and corresponding concave column slot and cylindrical groove form hollow cylinder structure, and reinforcer is located at open circles
In rod structure；Water blocking layer and Loose tube contact surface are known as water blocking layer inner edge, and water blocking layer is known as water blocking layer far from the surface of Loose tube
Outer rim, baseband layer are known as baseband layer outer rim far from the surface of waterstop, on any cross section with Loose tube axis perpendicular:
On the same circumference, and the radius of water blocking layer inner edge is R1 for water blocking layer inner edge, water blocking layer outer rim on the same circumference, and water blocking layer
The radius of outer rim be R2, baseband layer outer rim on the same circumference, and the radius of baseband layer outer rim be R3, R3 > R2 > R1, and hinder
The center of circle where water layer inner edge, water blocking layer outer rim, baseband layer outer rim three is to be overlapped, the difference of R3 and R2 be less than or equal to R2 with
The difference of R1；The top edge of water blocking layer and the top edge of baseband layer not on the same circumference, the lower edge and baseband layer of water blocking layer
Lower edge not on the same circumference.
Central-beam tube type fiber optic cable described above, it is characterised in that production method includes following steps:
Step 1: 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 the naked optical fiber of A1a type or A1b type or A1c type or A1d type or OM1 type or OM2 type or OM3 type are in optical fiber
On color machine carry out UV solidification coloring, make coloring layer with a thickness of 1~3 μm, color solidification degree >=85%；It is repeated multiple times, form more
The coloring layer of optical fiber, any two different optical fiber has different colors；
Step 2: Loose tube forming step: modified polypropene or polybutylene terephthalate (PBT) being taken to squeeze secondary coated
Melted and stirred evenly in the spiral shell chamber of molding machine；There is cavity by the stretched inside of the extrusion head of secondary coated extruding machine
Original Loose tube, while by the first step formed optical fiber penetrate in the cavity inside original Loose tube, draw original Loose tube
So that the optical fiber in cavity was moved together 20~40 DEG C of cooling trough with original Loose tube, forms finished product Loose tube, finished product pine
The outer rim extrusion molding of casing is formed with multiple cylindrical grooves, and cylindrical groove is the entire wall body for not penetrating through Loose tube；Finished product pine set
The length of optical fiber in pipe is 1.006~1.010 times of finished product Loose tube length；
Step 3: the step of placing reinforcer and protective layer: taking steel wire or copper wire or fiberglass reinforced plastics either
Composite material, the composite material refer to: inside is steel wire or copper wire or fiberglass reinforced plastics, outside are the reinforcements of plastics
Part is placed in 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,
Middle protective layer is made of baseband layer and the water blocking layer being adhered on baseband layer, has concave column slot on water blocking layer, and water blocking layer is close to
Loose tube and corresponding concave column slot and cylindrical groove form hollow cylinder structure, and a part of reinforcer is made to be located at open circles
In rod structure；Water blocking layer and Loose tube contact surface are known as water blocking layer inner edge, and water blocking layer is known as water blocking layer far from the surface of Loose tube
Outer rim, baseband layer are known as baseband layer outer rim far from the surface of waterstop, on any cross section with Loose tube axis perpendicular:
On the same circumference, and the radius of water blocking layer inner edge is R1 for water blocking layer inner edge, water blocking layer outer rim on the same circumference, and water blocking layer
The radius of outer rim be R2, baseband layer outer rim on the same circumference, and the radius of baseband layer outer rim be R3, R3 > R2 > R1, and hinder
The center of circle where water layer inner edge, water blocking layer outer rim, baseband layer outer rim three is to be overlapped, the difference of R3 and R2 be less than or equal to R2 with
The difference of R1；The top edge of water blocking layer and the top edge of baseband layer not on the same circumference, the lower edge and baseband layer of water blocking layer
Lower edge not on the same circumference；The material of the baseband layer is steel or aluminium；
Step 4: restrictive coating forming step: by low-smoke non-halogen flame-retardant polyethylene or linear low density polyethylene or low-density
Polyethylene or medium density polyethylene or high density polyethylene (HDPE) are coated on the protective layer of third step formation by sheath extruding machine extrusion molding
Except, restrictive coating is formed, the production of central-beam tube type fiber optic cable is completed.
Embodiment 2
See Fig. 4 and Fig. 5, and Fig. 1 and Fig. 2 is referred to, central-beam tube type fiber optic cable, it includes to envelope multifiber 2
Loose tube 1, multi reinforcements 3, restrictive coating 5, it is characterised in that it also has the multiple protections for covering Loose tube surface
Layer 4, protective layer is between Loose tube and restrictive coating；Loose tube outer rim has multiple cylindrical grooves 21, and cylindrical groove is not pass through
The entire wall body of logical Loose tube；Protective layer is made of baseband layer 42 and the water blocking layer being adhered on baseband layer 41, on water blocking layer
With concave column slot 411, water blocking layer is close to Loose tube and corresponding concave column slot and cylindrical groove form hollow cylinder structure,
Reinforcer is located in hollow cylinder structure；Water blocking layer and Loose tube contact surface are known as water blocking layer inner edge, and water blocking layer is far from Loose tube
Surface be known as water blocking layer outer rim, baseband layer is known as baseband layer outer rim far from the surface of waterstop, any with Loose tube axis
On perpendicular cross section: water blocking layer inner edge on the same circumference, and the radius of water blocking layer inner edge be R1, water blocking layer outer rim is same
On one circumference, and the radius of water blocking layer outer rim is R2, and on the same circumference, and the radius of baseband layer outer rim is baseband layer outer rim
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 be overlapped, 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 circumference, do not block water
Circumference where the top edge of layer than the circumference where the top edge of baseband layer further from concave column slot, the lower edge of water blocking layer with
Not on the same circumference, the circumference where the lower edge of water blocking layer is than the circle where the lower edge of baseband layer for the lower edge of baseband layer
Week is further from concave column slot.
Central-beam tube type fiber optic cable described above, it is characterised in that production method includes following steps:
Step 1: 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 the naked optical fiber of A1a type or A1b type or A1c type or A1d type or OM1 type or OM2 type or OM3 type are in optical fiber
On color machine carry out UV solidification coloring, make coloring layer with a thickness of 1~3 μm, color solidification degree >=85%；It is repeated multiple times, form more
The coloring layer of optical fiber, any two different optical fiber has different colors；
Step 2: Loose tube forming step: modified polypropene or polybutylene terephthalate (PBT) being taken to squeeze secondary coated
Melted and stirred evenly in the spiral shell chamber of molding machine；There is cavity by the stretched inside of the extrusion head of secondary coated extruding machine
Original Loose tube, while by the first step formed optical fiber penetrate in the cavity inside original Loose tube, draw original Loose tube
So that the optical fiber in cavity was moved together 20~40 DEG C of cooling trough with original Loose tube, forms finished product Loose tube, finished product pine
The outer rim extrusion molding of casing is formed with multiple cylindrical grooves, and cylindrical groove is the entire wall body for not penetrating through Loose tube；Finished product pine set
The length of optical fiber in pipe is 1.006~1.010 times of finished product Loose tube length；
Step 3: the step of placing reinforcer and protective layer: taking steel wire or copper wire or fiberglass reinforced plastics either
Composite material, the composite material refer to: inside is steel wire or copper wire or fiberglass reinforced plastics, outside are the reinforcements of plastics
Part is placed in 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,
Middle protective layer is made of baseband layer and the water blocking layer being adhered on baseband layer, has concave column slot on water blocking layer, and water blocking layer is close to
Loose tube and corresponding concave column slot and cylindrical groove form hollow cylinder structure, and reinforcer is located in hollow cylinder structure；
Water blocking layer and Loose tube contact surface are known as water blocking layer inner edge, and water blocking layer is known as water blocking layer outer rim, base band far from the surface of Loose tube
Layer is known as baseband layer outer rim far from the surface of waterstop, on any cross section with Loose tube axis perpendicular: in water blocking layer
On the same circumference, and the radius of water blocking layer inner edge is R1 to edge, water blocking layer outer rim on the same circumference, and the half of water blocking layer outer rim
Diameter is R2, and on the same circumference, and the radius of baseband layer outer rim is R3, R3 > R2 > R1 to baseband layer outer rim, and water blocking layer inner edge,
The center of circle where water blocking layer outer rim, baseband layer outer rim three is to be overlapped, and the difference of R3 and R2 are less than or equal to the difference of R2 and R1；
Not on the same circumference, the circumference where the top edge of water blocking layer compares baseband layer for the top edge of water blocking layer and the top edge of baseband layer
Top edge where circumference further from concave column slot, the lower edge of water blocking layer and the lower edge of baseband layer be not in same circumference
On, circumference where the lower edge of water blocking layer is than the circumference where the lower edge of baseband layer further from concave column slot；The base band
The material of layer is steel or aluminium；
Step 4: restrictive coating forming step: by low-smoke non-halogen flame-retardant polyethylene or linear low density polyethylene or low-density
Polyethylene or medium density polyethylene or high density polyethylene (HDPE) are coated on the protective layer of third step formation by sheath extruding machine extrusion molding
Except, restrictive coating is formed, the production of central-beam tube type fiber optic cable is completed.
Central-beam tube type fiber optic cable described in any of the above-described embodiment, it is characterised in that in the Loose tube other than optical fiber
It is also filled with the substance that blocks water.
Further, central-beam tube type fiber optic cable described above, it is characterised in that the substance that blocks water is ointment or blocks water
Powder or water blocking yarn.
Further, central-beam tube type fiber optic cable described above, it is characterised in that optical fiber and resistance in the Loose tube
Water substance accounts for 98% or more of Loose tube inner space volume.
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 coated with resistance
Water ointment or reinforcer outer surface are wound with water blocking yarn.
Central-beam tube type fiber optic cable described in any of the above-described embodiment, it is characterised in that the optical fiber be 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 type or A1b type or A1c type or A1d type or OM1
Type or OM2 type or OM3 type.
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
Polypropylene or polybutylene terephthalate (PBT).
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 cigarette
Zero halogen flame resistance polyethylene or linear low density polyethylene or low density polyethylene (LDPE) or medium density polyethylene or high density polyethylene (HDPE).
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 material, the composite material refer to: inside is steel wire or copper wire or glass
Fibre reinforced plastics, outside are plastics.
In the present invention, since a part of reinforcer is located in Loose tube wall body, therefore guaranteeing the load performance of optical cable
Meanwhile it can be effectively reduced the diameter of optical cable, reach that structure is simpler, outer diameter is thinner, production is more convenient, the lower mesh of cost
's；It is equally the optical cable of 12 cores, outer diameter, which can reduce by 15%, weight, can reduce 18%, and cost can reduce by 12%, life through calculating
Producing speed can be improved 25%.
In the present invention, reinforcer is that composite material refers to: inside is steel wire or copper wire or fiberglass reinforced plastics, outside are
Plastics；It bonds reinforcer effectively with Loose tube and water blocking layer, reaches the integrated purpose of cable configuration.
In the production method third step of central-beam tube type fiber optic cable described above, reinforcer first can be passed through into ointment or twined
Around upper, then reinforcer is placed to again in the cylindrical groove in the Loose tube of second step formation.
In embodiment 2 of the present invention, the top edge of the top edge of water blocking layer and baseband layer not on the same circumference, water blocking layer
Top edge where circumference than the circumference where the top edge of baseband layer further from concave column slot, the lower edge and base of water blocking layer
Not on the same circumference, the circumference where the lower edge of water blocking layer is than the circumference where the lower edge of baseband layer for the lower edge of belt
Further from concave column slot；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 intensity with higher and hardness, therefore can effectively act as reinforcing the effect that optical cable bears pulling force
And with the effect by pressure.
Production method of the 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 for reducing optical cable, reduces that space hold, structure are simpler, production is more convenient, cost
Lower equal advantageous effects.
The present invention is not limited to above-mentioned preferred forms, it should be understood that design of the invention can be by other various shapes
Formula is implemented to use, they also fall in protection scope of the present invention.
Claims (7)
1. central-beam tube type fiber optic cable, it includes the Loose tube, multi reinforcements, restrictive coating for enveloping multifiber, special
Sign, which is it also, has the multiple protective layers for covering Loose tube surface, and protective layer is between Loose tube and restrictive coating；Pine
Casing outer rim has multiple cylindrical grooves, and cylindrical groove is the entire wall body for not penetrating through Loose tube；Protective layer by baseband layer and
It is adhered to water blocking layer on baseband layer to constitute, there is concave column slot on water blocking layer, water blocking layer is close to Loose tube and corresponding recessed
Shape column slot and cylindrical groove form hollow cylinder structure, and reinforcer is located in hollow cylinder structure；Water blocking layer is contacted with Loose tube
Face is known as water blocking layer inner edge, and water blocking layer is known as water blocking layer outer rim, surface of the baseband layer far from waterstop far from the surface of Loose tube
Referred to as baseband layer outer rim, on any cross section with Loose tube axis perpendicular: water blocking layer inner edge on the same circumference, and hinders
The radius of water layer inner edge is R1, and on the same circumference, and the radius of water blocking layer outer rim is R2 to water blocking layer outer rim, and baseband layer outer rim exists
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, outside baseband layer
The center of circle where edge three is to be overlapped, and the difference of R3 and R2 are less than or equal to the difference of R2 and R1；The inner edge of water blocking layer and base band
Not on the same circumference, the outer rim of the outer rim of water blocking layer and baseband layer is not on the same circumference for the inner edge of layer；The outer rim of water blocking layer
Than baseband layer outer rim close to concave column slot；The material of the restrictive coating is low density polyethylene (LDPE) or medium density polyethylene or highly dense
Spend polyethylene；The material of the reinforcer is composite material, and the composite material refers to: inside is steel wire or copper wire or glass fibre
Reinforced plastics, outside are plastics；The substance that blocks water is also filled with other than optical fiber in the Loose tube.
2. central-beam tube type fiber optic cable according to claim 1, it is characterised in that optical fiber and water-blocking material in the Loose tube
Matter accounts for 98% or more of Loose tube inner space volume.
3. according to claim 1 or central-beam tube type fiber optic cable as claimed in claim 2, it is characterised in that the reinforcer outer surface
It is coated with greasy for preventing water or reinforcer outer surface is wound with water blocking yarn.
4. central-beam tube type fiber optic cable according to claim 3, 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 type or A1b type or A1c type or A1d type or OM1 type or OM2
Type or OM3 type.
5. according to claim 1 or central-beam tube type fiber optic cable as claimed in claim 2, it is characterised in that G.652 the optical fiber is
Type or G.653 type or G.654 type or G.655 type or G.656 type or G.657 type or A1a type or A1b type or A1c type or A1d type or
OM1 type or OM2 type or OM3 type.
6. the production method of central-beam tube type fiber optic cable, it is characterised in that include following steps:
Step 1: 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 the naked optical fiber of A1a type or A1b type or A1c type or A1d type or OM1 type or OM2 type or OM3 type are in optical fiber
On color machine carry out UV solidification coloring, make coloring layer with a thickness of 1~3 μm, color solidification degree >=85%；It is repeated multiple times, form more
The coloring layer of optical fiber, any two different optical fiber has different colors；
Step 2: Loose tube forming step: taking modified polypropene or polybutylene terephthalate (PBT) in secondary coated extruding machine
Spiral shell chamber in melted and stirred evenly；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 being penetrated in the cavity inside original Loose tube, drawing original Loose tube makes sky
Optical fiber in chamber moved together 20~40 DEG C of cooling trough with original Loose tube, formed finished product Loose tube, finished product Loose tube
Outer rim extrusion molding be formed with multiple cylindrical grooves, cylindrical groove is the entire wall body for not penetrating through Loose tube；In finished product Loose tube
The length of optical fiber be 1.006~1.010 times of finished product Loose tube length；
Step 3: the step of placing reinforcer and protective layer: taking steel wire or copper wire or fiberglass reinforced plastics either compound
Material, the composite material refer to: inside is steel wire or copper wire or fiberglass reinforced plastics, outside are the reinforcers of plastics, is set
Enter in the cylindrical groove in the Loose tube formed to second step；Sheath of going bail for is coated on outside Loose tube by forming machine, wherein protecting
Sheath is made of baseband layer and the water blocking layer being adhered on baseband layer, has concave column slot on water blocking layer, and water blocking layer is close to pine set
Pipe and corresponding concave column slot and cylindrical groove form hollow cylinder structure, and a part of reinforcer is made to be located at hollow cylinder knot
In structure；Water blocking layer and Loose tube contact surface are known as water blocking layer inner edge, and water blocking layer is known as water blocking layer outer rim far from the surface of Loose tube,
Baseband layer is known as baseband layer outer rim far from the surface of waterstop, on any cross section with Loose tube axis perpendicular: blocking water
On the same circumference, and the radius of water blocking layer inner edge is R1 for layer inner edge, water blocking layer outer rim on the same circumference, and water blocking layer outer rim
Radius be R2, on the same circumference, and the radius of baseband layer outer rim is R3, R3 > R2 > R1, and water blocking layer to baseband layer outer rim
The center of circle where inner edge, water blocking layer outer rim, baseband layer outer rim three is to be overlapped, and the difference of R3 and R2 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 circumference, under the lower edge and baseband layer of water blocking layer
Edge is not on the same circumference；The material of the baseband layer is steel or aluminium；
Step 4: restrictive coating forming step: linear low density polyethylene is coated on third step shape by sheath extruding machine extrusion molding
At protective layer except, formed restrictive coating, complete the production of central-beam tube type fiber optic cable.
7. the production method of central-beam tube type fiber optic cable, it is characterised in that include following steps:
Step 1: 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 the naked optical fiber of A1a type or A1b type or A1c type or A1d type or OM1 type or OM2 type or OM3 type are in optical fiber
On color machine carry out UV solidification coloring, make coloring layer with a thickness of 1~3 μm, color solidification degree >=85%；It is repeated multiple times, form more
The coloring layer of optical fiber, any two different optical fiber has different colors；
Step 2: Loose tube forming step: taking modified polypropene or polybutylene terephthalate (PBT) in secondary coated extruding machine
Spiral shell chamber in melted and stirred evenly；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 being penetrated in the cavity inside original Loose tube, drawing original Loose tube makes sky
Optical fiber in chamber moved together 20~40 DEG C of cooling trough with original Loose tube, formed finished product Loose tube, finished product Loose tube
Outer rim extrusion molding be formed with multiple cylindrical grooves, cylindrical groove is the entire wall body for not penetrating through Loose tube；In finished product Loose tube
The length of optical fiber be 1.006~1.010 times of finished product Loose tube length；
Step 3: the step of placing reinforcer and protective layer: taking steel wire or copper wire or fiberglass reinforced plastics either compound
Material, the composite material refer to: inside is steel wire or copper wire or fiberglass reinforced plastics, outside are the reinforcers of plastics, first
Reinforcer is passed through into ointment or winds upper water blocking yarn, is then placed to again in 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, and wherein protective layer is by baseband layer and the water blocking layer structure being adhered on baseband layer
At, there is concave column slot on water blocking layer, water blocking layer be close to Loose tube and corresponding concave column slot formed with cylindrical groove it is hollow
Cylindrical structure is located at a part of reinforcer in hollow cylinder structure；Water blocking layer and Loose tube contact surface are known as in water blocking layer
Edge, water blocking layer are known as water blocking layer outer rim far from the surface of Loose tube, and baseband layer is known as baseband layer outer rim far from the surface of waterstop,
On any cross section with Loose tube axis perpendicular: water blocking layer inner edge on the same circumference, and the radius of water blocking layer inner edge
For R1, on the same circumference, and the radius of water blocking layer outer rim is R2 to water blocking layer outer rim, baseband layer outer rim on the same circumference, and
The radius of baseband layer outer rim is R3, R3 > R2 > R1, and where water blocking layer inner edge, water blocking layer outer rim, baseband layer outer rim three
The center of circle is to be overlapped, and the difference of R3 and R2 are less than or equal to the difference of R2 and R1；The top edge of water blocking layer and the top edge of baseband layer
Not on the same circumference, the lower edge of the lower edge of water blocking layer and baseband layer is not on the same circumference；The material of the baseband layer
It is steel or aluminium；
Step 4: restrictive coating forming step: linear low density polyethylene is coated on third step shape by sheath extruding machine extrusion molding
At protective layer except, formed restrictive coating, complete the production of central-beam tube type fiber optic cable.
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| CN201710315852.3A CN106950669B (en) | 2015-04-23 | 2015-04-23 | Central-beam tube type fiber optic cable and production method |
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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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| CN106950668B (en) | 2019-10-18 |
| CN104793305B (en) | 2018-01-30 |
| CN106950667A (en) | 2017-07-14 |
| CN106950669A (en) | 2017-07-14 |
| CN106950667B (en) | 2019-07-05 |
| CN106950668A (en) | 2017-07-14 |
| CN104793305A (en) | 2015-07-22 |
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