CN207282196U - A kind of flexibility fire resisting low-voltage variable frequency cable - Google Patents
A kind of flexibility fire resisting low-voltage variable frequency cable Download PDFInfo
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- CN207282196U CN207282196U CN201721280746.8U CN201721280746U CN207282196U CN 207282196 U CN207282196 U CN 207282196U CN 201721280746 U CN201721280746 U CN 201721280746U CN 207282196 U CN207282196 U CN 207282196U
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Abstract
A kind of flexible fire resisting low-voltage variable frequency cable described in the utility model, including at least three cores and the shielded layer being wrapped in outside core；Each core includes conductor and the synthesis insulating layer being wrapped in outside conductor is formed, and comprehensive insulating layer includes inner insulating layer and external insulation layer；Shielded layer includes thermal insulation layer, refractory lining layer, chain armouring shielded layer and oversheath, and between core and core, filled layer is provided between core and shielded layer.The product of the utility model is a kind of style of full-shield, can be heat-resisting with high temperature resistant, and product has the performance of flame-retardant, and fire resistance rating can reach the A level standards of GB12666.6, i.e., burn 90min in 950 ~ 1000 DEG C of flame, and 3A fuses do not fuse；Also it can reach the highest level of Britain BS6387.
Description
Technical field
Field of cable technology, more particularly to a kind of low-voltage variable frequency cable are the utility model is related to, it is specifically a kind of soft
Property fire resisting low-voltage variable frequency cable.
Background technology
Variable-frequency motor has the advantages that more, and as equipment investment expense is few, simple in structure, small, cost is low, energy saving,
Speed adjustable range is big, has invariable power, the characteristic of permanent rotating speed, easy to use, and capacity is big etc..The energy-saving effect of converter plant is very
Substantially, frequency control motor is used in heavy-duty motor, whole generating set can economize on electricity 30%.And use frequency control
Afterwards, the soft start of motor is realized, makes motor stable working, motor bearings abrasion reduces, and extends motor service life and dimension
Protect the cycle.Therefore currently it is widely used in industrial aspects such as metallurgy, mine, railways, it is equally also a large amount of in household electrical appliance recently
Using.
The validity rule of cable shield is that the level of shielded layer more close electromagnetic radiation is lower.The screen of traditional cable
Shield structure：The shielded layer of cable is wrapped in the outside of three cores or four core phase lines using copper wire, with a spiral shape copper strips, reduces
The size in shielded layer hole.But shielding is not full-shield pattern, still remains defect.
The content of the invention
The purpose of this utility model is to provide a kind of flexible fire resisting low-voltage variable frequency cable, by being set to core and insulating layer
Put, it is intended to significantly improve fire resisting, the heat-proof quality of cable.
To achieve these goals, the technical solution of the utility model is：A kind of flexibility fire resisting low-voltage variable frequency cable, it is special
Sign is：The frequency-changing cable includes at least three cores and the shielded layer being wrapped in outside core；
Each core includes conductor and the synthesis insulating layer being wrapped in outside conductor is formed, and the synthesis insulating layer includes
Inner insulating layer and external insulation layer；The shielded layer includes thermal insulation layer, refractory lining layer, chain armouring shielded layer and oversheath,
Between the core and core, filled layer is provided between core and shielded layer.
Preferably, the frequency-changing cable includes three cores and three insulated wire cores, three cores and three insulated wires
The symmetrical stranding of core；The symmetrical stranding refers to that three cores are in triangular arranged at the heart in the cable, three insulated wires
Core also in the cable at the heart in one fall triangular arranged so that an insulated wire cores are equipped between the adjacent core of each two.Institute
The insulated wire cores diameter and the ratio of wire core diameter stated are 1：2.5—4.8.
Preferably, the synthesis insulating layer is the double layer of insulation for including inside and outside insulating layer, and inner insulating layer uses mineral
Insulated fireproof band it is overlapping it is wrapped form, wrapped thickness is 0.14mm；External insulation layer uses ceramic polyolefin insulation material system
Into the thickness of external insulation layer is 1.0mm-2.5mm.
Further, the thermal insulation layer is formed using alkali-free glass band is wrapped, and the wrapped thickness is 0.4-0.6mm,
Refractory lining layer is extruded on thermal insulation layer using ceramic polyolefin material and is formed, and the refractory lining layer thickness is 1.0-
3.58mm；Include supporting item in refractory lining layer.
Further, the chain armouring shielded layer is assembled by the way of the chain armouring of self-locking, by aluminium alloy
The single preforming band of S shapes is made in band or aluminium strip, and interlocking from beginning to end between adjacent preforming band and preforming band, it is sealed to carry out.
Further, oversheath use extrudes mode and is extruded on steel-tape armouring layer, 2~5mm of thickness, oversheath
Flame-proof polyethylene or low smoke and zero halogen sheath material is selected to be made.
Relative to the prior art, the technical solution of the utility model further includes many except the improvement of overall technical architecture
Improvement in terms of details, specifically, has the advantages that：
1st, improvement project described in the utility model, is equipped with 3 cores or 3 lines at the cable center of the utility model
The form of+three insulated wire cores of core；The form of this arrangement mode and symmetrical stranding, there is more preferable electromagnetic compatibility, to suppressing
Electromagnetic interference plays a role, and can offset the odd times frequency in higher hamonic wave, improves the anti-dry of Special cable of frequency-variable electric motor
Immunity, reduces the electromagnetic radiation in whole system；
2nd, the core of the technical solution of the utility model is using parcel dielectric layers outside conductor, due to using double fire resistings
Insulating layer is made, and double insulating layer interacts, in fire hazard environment（650℃-3000℃）Under do not melt, do not drip, and have
Extraordinary heat-insulated fire insulation effect, it is ensured that under fire condition electric power and communication it is unobstructed, be personnel escape and fire-fighting and rescue
Strive for valuable time；
3rd, shielded layer is enclosed with after core stranding described in the utility model outside it, shielded layer includes thermal insulation layer, fire resisting
Liner layer, chain armouring shielded layer and oversheath, shielded layer provide a uniform electric field, which can be in voltage
The permission length between motor and driver is increased before multiplication, meanwhile, shielded layer both plays suppression electromagnetic wave and externally launches
Effect, but also as the passage of short circuit current flow, the protective effect of neutral core can be played；
4th, the chain armouring shielded layer is assembled by the way of the chain armouring of self-locking, during sealed,
Armor is formed helical ripple, enhance anti-pressure ability, cable machinery performance can be improved, strengthen impact resistance, make electricity
Cable has good bending property.
Brief description of the drawings
Fig. 1 is the structure diagram of an embodiment of flexible fire resisting low-voltage variable frequency cable described in the utility model.
Fig. 2 is the structure diagram of the another embodiment of flexible fire resisting low-voltage variable frequency cable described in the utility model.
Reference numeral：
1 conductor, 2 inner insulating layers, 3 external insulation layers, 4 thermal insulation layers, 5 refractory lining layers, 6 chain armouring shielded layers, 7 are protected outside
Set, 8 filled layers, 9 insulated wire cores.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model part of the embodiment, instead of all the embodiments.Based on the embodiment in the utility model, sheet
Field those of ordinary skill all other embodiments obtained without making creative work, belong to this practicality
Novel protected scope.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in the description of the utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；It can be directly connected, can also be indirectly connected by intermediary, can be the connection inside two elements.For
For those of ordinary skill in the art, concrete meaning of the above-mentioned term in the utility model can be understood with concrete condition.
The utility model provides a kind of flexible fire resisting low-voltage variable frequency cable, and with reference in figure 1, the frequency-changing cable includes
At least three cores and the shielded layer being wrapped in outside core；Each core includes conductor and the comprehensive insulation being wrapped in outside conductor
Layer is formed, and the synthesis insulating layer includes inner insulating layer and external insulation layer；The shielded layer includes thermal insulation layer, refractory lining
Layer, chain armouring shielded layer and oversheath, between the core and core, are provided with filled layer between core and shielded layer.
Specifically, frequency-changing cable includes three cores, this three are master cores, and cable is arranged at after this three master core twisted synthesizing cables
Center at, three cores be arranged in an equilateral triangle form carry out it is twisted, here using balanced cable structure
Due to the interchangeability of conducting wire, there is more preferable electromagnetic compatibility, play a role to suppressing electromagnetic interference, it is humorous high order to be offset
Odd times frequency in ripple, improves the anti-interference of Special cable of frequency-variable electric motor, reduces the electromagnetic radiation in whole system.Here
Filled layer be filled using waterproofing rope, chondritic is made in waterproofing rope, the gap between spherical waterproofing rope, filling it is soft
Property supporting item, supporting item are made of finer wire, and the finer wire uses helicoidal structure, so have very high support and by
Rebound effect is pressed, it is better.
Specifically, it is as follows the advantages of the utility model：
1. excellent electrical insulating property：Volume resistivity is up to 1 × 1015Ω cm, 150~230KV/mm of breakdown strength, are situated between
Electrical loss tangent 10-4, can be used for insulating；
2. excellent shield effectiveness, aluminium（Alloy）Sheath provides a uniform electric field, which can be in electricity
The permission length between motor and driver is increased before pressure multiplication；Aluminium（Alloy）Sheath plays a kind of effective shielding and makees
With so that the crosstalk between reducing adjacent circuit；Aluminium（Alloy）Sheath is a kind of low-impedance path, the high frequency that can be prevented
Noise is diffused into the power grid on ground.Shielded layer both plays the role of suppression electromagnetic wave and externally launches, but also as short circuit current flow
Passage, can play the protective effect of neutral core.
It is 3. environmentally friendly：It is heavy metal free, nontoxic, tasteless, human body, environment are not had an impact；Ant proof, mouse bite preventing, prevent
Water, oil resistant.
4. good thermal insulation, thermal conductivity factor 0.09W/Mk, it is uniform cellular, tool to be particularly the inside after ablation
There are more preferable fire resistance and thermal insulation；
5. excellent fire resistance, fire resistance rating can reach the A level standards of GB12666.6, i.e., in 950 ~ 1000 DEG C of flames
Middle burning 90min, 3A fuses do not fuse；Also the C W Z highest levels of Britain BS6387 are can reach, i.e. C --- in 950 DEG C of fire
Burn 3H in flame, W --- water spray, Z --- vibrations；
In one embodiment, the frequency-changing cable includes three cores and three insulated wire cores, i.e. 3+3 patterns, 3+3
The core construction of cable is by the 4th core in a three big small four core insulations cores（Neutral core）It is decomposed into three less insulation in section
Core, three cores and three symmetrical strandings of insulated wire cores；The symmetrical stranding refers to that three cores are in the cable at the heart
Triangular arranged, three insulated wire cores also in the cable at the heart in one fall triangular arranged so that each two is adjacent
An insulated wire cores are equipped between core.Here core uses copper conductor, and copper conductor is wrapped with inside and outside double layer of insulation, makes
Obtain fire resistance more preferably, insulated wire cores section here is smaller, and the ratio between insulated wire cores diameter and wire core diameter are 1：2.8-4.68.
One layer of non-directional silicon steel sheet is wound with outside the copper wire conductor of insulated wire cores, the non-directional silicon steel sheet is spiral equipped with one
Shape is embedded groove, and spiral helicine be embedded in groove is equipped with superconductor, and the superconductor can use room temperature superconduction material
Material, such as ceramic superconductor or superconductive pellet so that cable during the work time, there is more preferable electromagnetic compatibility, to suppressing electricity
Magnetic disturbance plays a role.
In another embodiment, frequency-changing cable includes at least three cores and the shielded layer being wrapped in outside core；It is described
Shielded layer include thermal insulation layer, refractory lining layer, chain armouring shielded layer and oversheath, between the core and core, line
Filled layer is provided between core and shielded layer.The thermal insulation layer is formed using alkali-free glass band is wrapped, glass fiber tape environmental protection
It is nontoxic, there is high temperature resistant and fire protecting performance, heat-proof quality is excellent.The wrapped thickness is 0.48mm, and refractory lining layer uses
Ceramic polyolefin material, which is extruded on thermal insulation layer, to be formed, and the refractory lining layer thickness is 2.48mm；Wrapped in refractory lining layer
Containing supporting item, the supporting item is flexible strutting piece, and supporting item is made of finer wire, and the finer wire is using spiral
Shape structure, so there is very high support and compression rebound effect, it is ensured that when running into big fire, the main body knot of refractory lining layer
Structure is not easy slack and undisciplined, while load performance is more preferably.
Further, refractory lining layer is extruded on thermal insulation layer using ceramic polyolefin material, and ceramic polyolefin material is horizontal
Combustion can not be prolonged with self-extinguishment by burning, more than oxygen index (OI) >=35；In the case of 350-1600 DEG C has flame, nonflame, do not melt, do not drip
Fall, do not fall off, spot fire will not be caused, hard ceramic-like armour body can be burnt till, temperature is higher, the ceramics after time longer burning
Shape armour body is harder, and residue is ceramic inorganic thing, and residual volume is more than 80%, and it is trickle that ceramic-like armour physical efficiency forms ceramic honeycomb
Hole, can play good fire insulation, heat insulation, its excellent anti-flammability can play the role of good fire resisting again.
In a specific embodiment, referring specifically to Fig. 2, the frequency-changing cable includes three cores and three and thoroughly does away with edge
Core, i.e. 3+3 patterns, the 3+3 core constructions of cable are by the 4th core in three big small four cores（Neutral core）Three are decomposed into cut
The less insulated wire cores in face, three cores and three symmetrical strandings of insulated wire cores.Each core is by copper conductor and is wrapped in copper
Synthesis insulating layer outside conductor is formed, and the synthesis insulating layer is the double layer of insulation for including inside and outside insulating layer, inner insulating layer
Using mineral insulation fire-resistant wrapping tape it is overlapping it is wrapped form, wrapped thickness is 0.14m；External insulation layer is exhausted using ceramic polyolefin
Edge material is made, and the thickness of external insulation layer is 1.85mm.Here ceramic polyolefin refractory insulation material, which removes, has common polyolefin
Outside the characteristic of Insulation Material, also with excellent fire resisting, fire-resistance property, it is hard that it can form hard ceramic-like under the calcination of flame
Shell, the duricrust is in fire hazard environment（650℃-3000℃）Under do not melt, do not drip, and with extraordinary heat-insulated fire insulation effect
Fruit, it is ensured that electric power and communication is unobstructed under fire condition, strives for valuable time for personnel escape and fire-fighting and rescue.
Further, chain armouring shielded layer is assembled by the way of the chain armouring of self-locking, by aluminum alloy strip or aluminium
The single preforming band of S shapes is made in band, and interlocking from beginning to end between adjacent preforming band and preforming band, it is sealed to carry out.In order to obtain
More preferable shield effectiveness, one layer of aluminum alloy strip, institute are attached in the inner and outer surfaces of the preforming band of S shapes for the connection that interlocks from beginning to end respectively
The aluminum alloy strip stated not only preferably has been relatively fixed chain armouring shielded layer, while further enhancing shield effectiveness.Wherein,
The aluminum alloy strip surface of outer layer is equipped with the salient point of outwardly convex, to stiffening effect.
Cable uses the chain armouring of self-locking, and material uses aluminum alloy strip or aluminium strip, and according to different size, thickness selects respectively
It is 0.6mm, 0.75mm band with thickness.Common metal armouring is to use to overlap connection between packet mode, band, easily de-
Section.Chain armouring is by special chain armored equipment, smooth band is pre-formed as S shapes, then ring ring phase between band
Button, it is sealed each other, during sealed, armor is formed helical ripple, enhance anti-pressure ability, cable gear can be improved
Tool performance, strengthens impact resistance, cable is had good bending property.The chain armouring aluminium formed by chain armouring shielded layer
（Alloy）Sheath provides a uniform electric field, which can increase motor and driver before voltage multiplication
Between permission length；Aluminium（Alloy）Sheath plays a kind of effective shielding action, so that the crosstalk between reducing adjacent circuit；
Aluminium（Alloy）Sheath is a kind of low-impedance path, and the high frequency noise that can be prevented is diffused into the power grid on ground；Meanwhile aluminium
（Alloy）Sheath can be used as ground wire to use, and reduce cable cost.
Further, chain armouring shielded layer has excellent shield effectiveness, and chain armouring shielded layer is as a kind of aluminium（Close
Gold）Sheath, there is provided a uniform electric field, the electric field can be increased before voltage multiplication motor and driver it
Between permission length；Aluminium（Alloy）Sheath plays a kind of effective shielding action, so that the crosstalk between reducing adjacent circuit；Aluminium
（Alloy）Sheath is a kind of low-impedance path, and the high frequency noise that can be prevented is diffused into the power grid on ground.Shielded layer both rose
The effect externally launched to suppression electromagnetic wave, but also as the passage of short circuit current flow, can play the protective effect of neutral core.
Specific embodiment of the utility model is described in detail above, but it is intended only as example, and this practicality is new
Type is not restricted to particular embodiments described above.To those skilled in the art, it is any that the utility model is carried out
Equivalent modifications and substitute also all among the category of the utility model.Therefore, the spirit and model of the utility model are not being departed from
Lower made impartial conversion and modification are enclosed, should all be covered in the scope of the utility model.
Claims (6)
- A kind of 1. flexibility fire resisting low-voltage variable frequency cable, it is characterised in that：The frequency-changing cable includes at least three cores and bag The shielded layer being wrapped in outside core；Each core includes conductor and the synthesis insulating layer being wrapped in outside conductor is formed, and the synthesis insulating layer includes interior exhausted Edge layer and external insulation layer；The shielded layer includes thermal insulation layer, refractory lining layer, chain armouring shielded layer and oversheath, the core and core Between, filled layer is provided between core and shielded layer.
- A kind of 2. flexible fire resisting low-voltage variable frequency cable according to claim 1, it is characterised in that：The frequency-changing cable bag Include three cores and three insulated wire cores, three cores and three symmetrical strandings of insulated wire cores；The symmetrical stranding refers to that three cores are in the cable triangular arranged at the heart, and three insulated wire cores are also in electricity At cable center in one fall triangular arranged so that an insulated wire cores are equipped between the adjacent core of each two；The insulated wire cores diameter and the ratio of wire core diameter are 1：2.5—4.8.
- A kind of 3. flexible fire resisting low-voltage variable frequency cable according to claim 1, it is characterised in that：The synthesis insulating layer The double layer of insulation for including inside and outside insulating layer, inner insulating layer using mineral insulation fire-resistant wrapping tape it is overlapping it is wrapped form, it is wrapped Thickness is 0.1-0.21mm；External insulation layer is made of ceramic polyolefin insulation material, and the thickness of external insulation layer is 1.0mm-2.5mm.
- A kind of 4. flexible fire resisting low-voltage variable frequency cable according to claim 1, it is characterised in that：The thermal insulation layer uses Alkali-free glass band is wrapped to be formed, and the wrapped thickness is 0.4-0.6mm, and refractory lining layer is extruded using ceramic polyolefin material Formed on thermal insulation layer, the refractory lining layer thickness is 1.0-3.58mm；Include supporting item in refractory lining layer.
- A kind of 5. flexible fire resisting low-voltage variable frequency cable according to claim 1, it is characterised in that：The chain armouring screen Cover layer to be assembled by the way of the chain armouring of self-locking, the single preforming band of S shapes, phase is made in aluminum alloy strip or aluminium strip Interlocking from beginning to end between adjacent preforming band and preforming band, it is sealed to carry out.
- A kind of 6. flexible fire resisting low-voltage variable frequency cable according to claim 1, it is characterised in that：The oversheath uses The mode of extruding is extruded on steel-tape armouring layer, 2~5mm of thickness, and oversheath selects flame-proof polyethylene or low smoke and zero halogen sheath material system Into.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721280746.8U CN207282196U (en) | 2017-09-30 | 2017-09-30 | A kind of flexibility fire resisting low-voltage variable frequency cable |
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| CN201721280746.8U CN207282196U (en) | 2017-09-30 | 2017-09-30 | A kind of flexibility fire resisting low-voltage variable frequency cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107622825A (en) * | 2017-09-30 | 2018-01-23 | 上海朗达电缆（集团）有限公司 | A kind of flexible fire resisting low-voltage variable frequency cable |
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- 2017-09-30 CN CN201721280746.8U patent/CN207282196U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107622825A (en) * | 2017-09-30 | 2018-01-23 | 上海朗达电缆（集团）有限公司 | A kind of flexible fire resisting low-voltage variable frequency cable |
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