CN110444333A - A kind of flame retardant cable and its production method - Google Patents
A kind of flame retardant cable and its production method Download PDFInfo
- Publication number
- CN110444333A CN110444333A CN201910696706.9A CN201910696706A CN110444333A CN 110444333 A CN110444333 A CN 110444333A CN 201910696706 A CN201910696706 A CN 201910696706A CN 110444333 A CN110444333 A CN 110444333A
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- China
- Prior art keywords
- layer
- retardant
- cable
- flame retardant
- fire
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
Abstract
The invention belongs to field of cable technology, more particularly to a kind of flame retardant cable, including cable core, fire-retardant belting layer, inner restrictive coating, armor and external sheath layer, several groups cable core is fixed on the inside of the fire-retardant belting layer, the cable core includes the conductor being successively arranged from inside to outside, insulating layer and shielded layer, filled layer is fixed between adjacent cable core, the fire-retardant belting layer is fixed with the inner restrictive coating far from a side of the cable core, the inner restrictive coating is fixed with the armor far from a side of the fire-retardant belting layer, the armor is fixed with the external sheath layer far from a side of the inner restrictive coating, oxygen barrier layer is fixed between the external sheath layer and the armor, the material of the external sheath layer is halogen-free and low-smoke flame-retardant polyolefin material, and halogen-free and low-smoke flame-retardant polyolefin sheathed production is by the way of squeezing out, and it adopts It is 160-170 degrees Celsius with the temperature of extruder.
Description
Technical field
The invention belongs to field of cable technology more particularly to a kind of flame retardant cable and its production methods.
Background technique
With the rapid development of China's communications industry, the artery and blood vessel that electric wire, cable are conveyed as signal, demand also with
Day all increasings.Due to electric wire, cable be for energization, so electric wire, inherently will not it is exposed outside, in order to ensure personnel
Safety, electric wire, cable outside can be enclosed with insulating materials, and during use, electric wire, the insulating materials of cable surface are most
Plastics, at high temperature using premature aging is easy to cause, the problems such as fluting is tacky, long-time surface occur chip off-falling to
Lose function.And the environment that some electric wires, cable go out is exactly the environment for being easy to produce flare, flame, can thus be aggravated
Destroy the stability of surface plastic materials, some electric wires, cable are easy to will appear burning, generation open fire, cause electric wire, inside cable
Copper wire is exposed, and be easy to cause short circuit etc..
But the structure of present flame retardant cable is generally fairly simple, and the flame retardant property of cable is bad, so that fire-retardant
The using effect of cable is had a greatly reduced quality, and security risk is caused.
Summary of the invention
The present invention is directed to above-mentioned problem, provides a kind of flame retardant cable and its production method.
According to an aspect of the invention, there is provided a kind of flame retardant cable, including cable core, fire-retardant belting layer, inner restrictive coating,
Armor and external sheath layer, are fixed with several groups cable core on the inside of the fire-retardant belting layer, the cable core include from inside to outside according to
The secondary conductor being equipped with, insulating layer and shielded layer are fixed with filled layer between adjacent cable core, and the fire-retardant belting layer is far from the cable
A side of core is fixed with the inner restrictive coating, and the inner restrictive coating is fixed with described far from a side of the fire-retardant belting layer
Armor, the armor are fixed with the external sheath layer, the external sheath layer and institute far from a side of the inner restrictive coating
It states and is fixed with oxygen barrier layer between armor, the material of the external sheath layer is halogen-free and low-smoke flame-retardant polyolefin material, and Halogen is low
Smoke flame-retardant polyolefin sheathed production uses the temperature of extruder for 160-170 degrees Celsius by the way of squeezing out.
Preferably, the extruder screw used should select draw ratio L/D for 20 single line screw rod, and the revolving speed of screw rod is small
In 20-22r/min.
Preferably, the conductor is anaerobic round copper rod, and pressed by more round conductors are twisted, and tightening factor
Not less than 0.9.
Preferably, it is one that the mode of the conductor strand, which is the twisted central core of middle rule, the second layer is the six roots of sensation, Qi Taxiang
Adjacent bed differs the six roots of sensation, outermost to twist to for left-hand, other adjacent layers it is contrary, and share six layers and be twisted.
Preferably, the insulating layer and shielded layer use two layers of coextrusion process, totally-enclosed chemical crosslinking.
Preferably, the material of the insulating layer is made of cross-linking polyethylene materials, and crosslinked polyethylene is handed over using irradiation
Join polyethylene, the thickness of insulating layer is not less than 4.5mm, and the insulation eccentricity degree on any section of insulating layer is not less than 10%.
Preferably, the oxygen barrier layer is combined by inorganic metal hyrate, the inorganic metal hyrate is hydrogen-oxygen
Change magnesium and aluminium hydroxide.
Preferably, the material of the armor is zinc-coated wire, the fire-retardant belting layer is LSOH anti-flaming band.
Preferably, the material of the filled layer be non-hygroscopic LSOH anti-flaming material, and use non-hygroscopic
LSOH anti-flaming material is dustless rock wool flame-retardant rope or glass-silk rope.
According to another aspect of the present invention, a kind of production method of flame retardant cable is provided, comprising the following steps:
S101；The single line of cable core is drawn, and selecting copper content is 99.97% oxygen-free copper, and copper shank diameter is the round copper rod of 7.2mm, and
The size of copper bar should uniformly, and surface should not have the defects of flanging, wrong circle, crackle, impurity and kink, and be carried out by guy-line equipment
It draws；
S103；The twisted of conductor cable is carried out, multi-layer conductor leads are twisted by twisted equipment；
S105；Two layers of coextrusion process are used to insulating layer and shielded layer, carry out totally-enclosed chemical crosslinking, and be extruded in copper core stock table
Face makes the copper core stock extruded combine closely with shielded layer and insulating layer；
S107；It is tightly packed using the progress of non-hygroscopic LSOH anti-flaming material by cable-former, and keep filled layer uniform
Rounding；
S109；It is using winding machine that fire-retardant band and inner restrictive coating is compound around filler surface；
S111；Fill armour: using armouring machine using zinc-coated wire around inner restrictive coating surface；
S113；Grouting: the slurry that inorganic, metal oxide is formed is coated on to the surface of armor using grouter；Low smoke, zero halogen
Flame retardant polyolefine material；
S115；The extrusion of oversheath: the single line screw rod for the use of screw slenderness ratio L/D being 20, and the revolving speed of screw rod is less than 20-22r/
Halogen-free and low-smoke flame-retardant polyolefin material extrusion is coated on armouring layer surface by the extruder of min, and the initial temperature of extruder is arranged
Spend 5-10 degrees Celsius lower than normal extrusion temperature；
S117；Package is carried out after passed examination, is put in storage.
Compared with prior art, the advantages and positive effects of the present invention are,
1, overall structure of the present invention is simple, and obtained surface of outer sheath is smooth, and anti-flammability with higher, improves the resistance of cable
Fire performance.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention, for ability
For the those of ordinary skill of domain, without any creative labor, it can also be obtained according to these attached drawings others
Attached drawing.
Fig. 1 is the structural schematic diagram for the flame retardant cable that embodiment 1 provides；
Fig. 2 is the production method flow chart for the flame retardant cable that embodiment 1 provides；
In above each figure, 1, cable core；2, fire-retardant belting layer；3, inner restrictive coating；4, armor；5, external sheath layer；6, conductor；7, absolutely
Edge layer；8, shielded layer；9, filled layer；10, oxygen barrier layer.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawings and examples
The present invention will be further described.It should be noted that in the absence of conflict, in embodiments herein and embodiment
Feature can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other modes described herein are different from, therefore, the present invention is not limited to the specific of specification is described below
The limitation of embodiment.
Embodiment 1, as shown in Figure 1, the present invention provides a kind of flame retardant cable, including cable core 1, fire-retardant belting layer 2, interior shield
Jacket layer 3, armor 4 and external sheath layer 5, the inside of the fire-retardant belting layer 2 are fixed with several groups cable core 1, and the cable core 1 includes
Conductor 6, insulating layer 7 and the shielded layer 8 being successively arranged from inside to outside are fixed with filled layer 9 between adjacent cable core 1, described fire-retardant
Belting layer 2 is fixed with the inner restrictive coating 3 far from a side of the cable core 1, and the inner restrictive coating 3 is far from the resistance
A side of combustion belting layer 2 is fixed with the armor 4, and the armor 4 is fixed with far from a side of the inner restrictive coating 3
The external sheath layer 5 is fixed with oxygen barrier layer 10, the material of the external sheath layer 5 between the external sheath layer 5 and the armor 4
By the way of material is halogen-free and low-smoke flame-retardant polyolefin material, and halogen-free and low-smoke flame-retardant polyolefin sheathed production is using extrusion, and adopt
It is 160-170 degrees Celsius with the temperature of extruder.
Further, the extruder screw used should select draw ratio L/D for 20 single line screw rod, and the revolving speed of screw rod is small
In 20-22r/min；By selecting single line screw rod, and screw speed is less than 20-22r/min, the smooth shield in available surface
Set.
Further, the conductor 6 is anaerobic round copper rod, and is pressed by more round conductors 6 are twisted, and press and be
Number is not less than 0.9, by pressing so that 6 surface of conductor is smooth, when avoiding electric field concentration, while preventing plastic extruding insulated, partly leads
6 electrical materials and appliances of body enter core, can be effectively prevented moisture entrance, and structure is made to guarantee certain flexibility, and stranded conductor 6 has soft
It is soft good, good reliability, the high feature of intensity.
Further, it is one that the twisted mode of the conductor 6, which is the twisted central core of middle rule, and the second layer is the six roots of sensation, other
Adjacent layer differs the six roots of sensation, outermost to twist to for left-hand, other adjacent layers it is contrary, and share six layers and be twisted, adopt
Stablized with such lay configuration.
Further, the insulating layer 7 and shielded layer 8 use two layers of coextrusion process, totally-enclosed chemical crosslinking.
Further, the material of the insulating layer 7 is made of cross-linking polyethylene materials, and crosslinked polyethylene is handed over using irradiation
Join polyethylene, the thickness of insulating layer 7 is not less than 4.5mm, and the insulation eccentricity degree on any section of insulating layer 7 is not less than 10%；Irradiation
Crosslinking is the high-energy electron line generated using electron accelerator, bombards insulating layer 7, macromolecular chain is interrupted, this crosslinking side
Formula can make polyolefin be crosslinked and influence anti-flammability and electric property not only without high temperature but also no moisture.
Further, the oxygen barrier layer 10 is combined by inorganic metal hyrate, and the inorganic metal hyrate is hydrogen
Magnesia and aluminium hydroxide.
Further, the material of the armor 4 is zinc-coated wire, and the fire-retardant belting layer 2 is LSOH anti-flaming packet
Band.
Further, the material of the filled layer 9 be non-hygroscopic LSOH anti-flaming material, and use non-hygroscopic
LSOH anti-flaming material is dustless rock wool flame-retardant rope or glass-silk rope.
Embodiment 2, as shown in Fig. 2, the present invention provides a kind of production methods of flame retardant cable, comprising the following steps:
S101；The single line of cable core is drawn, and selecting copper content is 99.97% oxygen-free copper, and copper shank diameter is the round copper rod of 7.2mm, and copper bar
Size should uniformly, surface should not have the defects of flanging, wrong circle, crackle, impurity and kink, and be drawn by guy-line equipment
System；
S103；The twisted of conductor cable is carried out, multi-layer conductor leads are twisted by twisted equipment；
S105；Two layers of coextrusion process are used to insulating layer and shielded layer, carry out totally-enclosed chemical crosslinking, and be extruded in copper core stock table
Face makes the copper core stock extruded combine closely with shielded layer and insulating layer；
S107；It is tightly packed using the progress of non-hygroscopic LSOH anti-flaming material by cable-former, and keep filled layer uniform
Rounding；
S109；It is using winding machine that fire-retardant band and inner restrictive coating is compound around filler surface；
S111；Fill armour: using armouring machine using zinc-coated wire around inner restrictive coating surface；
S113；Grouting: the slurry that inorganic, metal oxide is formed is coated on to the surface of armor using grouter；Low smoke, zero halogen
Flame retardant polyolefine material；
S115；The extrusion of oversheath: the single line screw rod for the use of screw slenderness ratio L/D being 20, and the revolving speed of screw rod is less than 20-22r/
Halogen-free and low-smoke flame-retardant polyolefin material extrusion is coated on armouring layer surface by the extruder of min, and the initial temperature of extruder is arranged
Spend 5-10 degrees Celsius lower than normal extrusion temperature；
S117；Package is carried out after passed examination, is put in storage.
In order to facilitate above-mentioned technical proposal of the invention is understood, below just present invention working principle in the actual process or
Person's mode of operation is described in detail.
In practical application, the change by the construction of cable can achieve fire-retardant purpose, and flame retardant cable should have hyperoxia
The extrusion lining of index, and sheath material contacts flame Shi Yingyou shelling, therefore the sheath of flame retardant cable should have suitable squeeze
Technique out could ensure the anti-flammability of flame retardant cable, if the cooling device of extruder is not perfect, revolution speed of screw is fast, can all make
The extrusion temperature for obtaining protective cover material in extrusion process increases and exceeds the range of work of material, and fire retardant is caused to decompose, and oxygen barrier layer
In contain highly filled magnesium hydroxide and aluminium hydroxide, if extruder screw draw ratio, shearing force be excessive or screw RPM too high
Will make the sheath material frictional heat generation in extrusion process, material temperature steeply rises, and heated time it is too long cause it is inorganic fire-retarded
Filler decomposes, and causes expression surface to be deteriorated, shield sleeve flame reduced performance, is 20 single line spiral shell by selecting screw slenderness ratio
Bar, and the revolving speed of screw rod is less than the extruder of 20-22r/min, available ideal surface is as a result as follows:
The above described is only a preferred embodiment of the present invention, be not that the invention has other forms of limitations, it is any ripe
Know the equivalent reality that professional and technical personnel was changed or be modified as equivalent variations possibly also with the technology contents of the disclosure above
Example is applied applied to other fields, but without departing from the technical solutions of the present invention, according to the technical essence of the invention to
Any simple modification, equivalent variations and remodeling, still fall within the protection scope of technical solution of the present invention made by upper embodiment.
Claims (10)
1. a kind of flame retardant cable, which is characterized in that including cable core (1), fire-retardant belting layer (2), inner restrictive coating (3), armor (4)
With external sheath layer (5), it is fixed with several groups cable core (1) on the inside of the fire-retardant belting layer (2), the cable core (1) includes from interior
Conductor (6), insulating layer (7) and the shielded layer (8) being successively arranged outward are fixed with filled layer (9), institute between adjacent cable core (1)
It states fire-retardant belting layer (2) to be fixed with the inner restrictive coating (3) far from a side of the cable core (1), the inner restrictive coating (3) is remote
A side from the fire-retardant belting layer (2) is fixed with the armor (4), and the armor (4) is far from the inner restrictive coating
(3) a side is fixed with the external sheath layer (5), is fixed between the external sheath layer (5) and the armor (4) oxygen barrier
The material of layer (10), the external sheath layer (5) is halogen-free and low-smoke flame-retardant polyolefin material, and halogen-free and low-smoke flame-retardant polyolefin sheathed
Production using extrusion by the way of, and use the temperature of extruder for 160-170 degrees Celsius.
2. a kind of flame retardant cable according to claim 1, which is characterized in that the extruder screw of use should select draw ratio
Single line screw rod that L/D is 20, and the revolving speed of screw rod is less than 20-22r/min.
3. a kind of flame retardant cable according to claim 1, which is characterized in that the conductor (6) is anaerobic round copper rod, and by
More round conductors (6) are twisted to be pressed, and tightening factor is not less than 0.9.
4. a kind of flame retardant cable according to claim 3, which is characterized in that the twisted mode of the conductor (6) is middle rule
Twisted central core is one, and the second layer is the six roots of sensation, and other adjacent layers differ the six roots of sensation, outermost to twist to for left-hand, other adjacent
Layer it is contrary, and share six layers and be twisted.
5. a kind of flame retardant cable according to claim 1, which is characterized in that the insulating layer (7) and shielded layer (8) use
Two layers of coextrusion process, totally-enclosed chemical crosslinking.
6. a kind of flame retardant cable according to claim 1, which is characterized in that the material of the insulating layer (7) is that crosslinking is poly-
Vinyl material is made, and crosslinked polyethylene uses Radiation Crosslinked Polyethylene, and the thickness of insulating layer (7) is not less than 4.5mm, insulating layer
(7) the insulation eccentricity degree on any section is not less than 10%.
7. a kind of flame retardant cable according to claim 1, which is characterized in that the oxygen barrier layer (10) is by inorganic metal aquation
Object is combined, and the inorganic metal hyrate is magnesium hydroxide and aluminium hydroxide.
8. a kind of flame retardant cable according to claim 1, which is characterized in that the material of the armor (4) is galvanized steel
Silk, the fire-retardant belting layer (2) are LSOH anti-flaming band.
9. a kind of flame retardant cable according to claim 1, which is characterized in that the material of the filled layer (9) is non-hygroscopic
Property LSOH anti-flaming material, and the non-hygroscopic LSOH anti-flaming material used is dustless rock wool flame-retardant rope or glass fiber
Rope.
10. a kind of production method of flame retardant cable, which is characterized in that for the preparation to flame retardant cable described in claim 1,
The following steps are included:
S101；The single line of cable core is drawn, and selecting copper content is 99.97% oxygen-free copper, and copper shank diameter is the round copper rod of 7.2mm, and
The size of copper bar should uniformly, and surface should not have the defects of flanging, wrong circle, crackle, impurity and kink, and be carried out by guy-line equipment
It draws；
S103；The twisted of conductor cable is carried out, multi-layer conductor leads are twisted by twisted equipment；
S105；Two layers of coextrusion process are used to insulating layer and shielded layer, carry out totally-enclosed chemical crosslinking, and be extruded in copper core stock table
Face makes the copper core stock extruded combine closely with shielded layer and insulating layer；
S107；It is tightly packed using the progress of non-hygroscopic LSOH anti-flaming material by cable-former, and keep filled layer uniform
Rounding；
S109；It is using winding machine that fire-retardant band and inner restrictive coating is compound around filler surface；
S111；Fill armour: using armouring machine using zinc-coated wire around inner restrictive coating surface；
S113；Grouting: the slurry that inorganic, metal oxide is formed is coated on to the surface of armor using grouter；Low smoke, zero halogen
Flame retardant polyolefine material；
S115；The extrusion of oversheath: the single line screw rod for the use of screw slenderness ratio L/D being 20, and the revolving speed of screw rod is less than 20-22r/
Halogen-free and low-smoke flame-retardant polyolefin material extrusion is coated on armouring layer surface by the extruder of min, and the initial temperature of extruder is arranged
Spend 5-10 degrees Celsius lower than normal extrusion temperature；
S117；Package is carried out after passed examination, is put in storage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910696706.9A CN110444333A (en) | 2019-07-30 | 2019-07-30 | A kind of flame retardant cable and its production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910696706.9A CN110444333A (en) | 2019-07-30 | 2019-07-30 | A kind of flame retardant cable and its production method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110444333A true CN110444333A (en) | 2019-11-12 |
Family
ID=68432401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910696706.9A Pending CN110444333A (en) | 2019-07-30 | 2019-07-30 | A kind of flame retardant cable and its production method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060137894A1 (en) * | 2004-12-27 | 2006-06-29 | Daniel Cusson | Electrical power cable having expanded polymeric layers |
| CN204087893U (en) * | 2014-09-03 | 2015-01-07 | 苏州天盛电线电缆有限公司 | A kind of cross-linking radiation high-performance high flame-retardant electric wire and cable |
| CN105551668A (en) * | 2016-02-19 | 2016-05-04 | 无锡市恒汇电缆有限公司 | Environment-friendly composite high-voltage electric power cable for smart power grid and preparation method thereof |
| CN206040291U (en) * | 2016-06-15 | 2017-03-22 | 湖北航天电缆有限公司 | Environment -friendly low smoke and zero halogen polyolefin medium voltage power cable |
| CN206774295U (en) * | 2017-05-26 | 2017-12-19 | 扬州中大电缆有限公司 | A kind of A classes flame-retardant fire-resistant power cable |
-
2019
- 2019-07-30 CN CN201910696706.9A patent/CN110444333A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060137894A1 (en) * | 2004-12-27 | 2006-06-29 | Daniel Cusson | Electrical power cable having expanded polymeric layers |
| CN204087893U (en) * | 2014-09-03 | 2015-01-07 | 苏州天盛电线电缆有限公司 | A kind of cross-linking radiation high-performance high flame-retardant electric wire and cable |
| CN105551668A (en) * | 2016-02-19 | 2016-05-04 | 无锡市恒汇电缆有限公司 | Environment-friendly composite high-voltage electric power cable for smart power grid and preparation method thereof |
| CN206040291U (en) * | 2016-06-15 | 2017-03-22 | 湖北航天电缆有限公司 | Environment -friendly low smoke and zero halogen polyolefin medium voltage power cable |
| CN206774295U (en) * | 2017-05-26 | 2017-12-19 | 扬州中大电缆有限公司 | A kind of A classes flame-retardant fire-resistant power cable |
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Application publication date: 20191112 |