CN203150163U - Flame-retardant frequency-variable cable for coal mining machines - Google Patents
Flame-retardant frequency-variable cable for coal mining machines Download PDFInfo
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- CN203150163U CN203150163U CN 201320016073 CN201320016073U CN203150163U CN 203150163 U CN203150163 U CN 203150163U CN 201320016073 CN201320016073 CN 201320016073 CN 201320016073 U CN201320016073 U CN 201320016073U CN 203150163 U CN203150163 U CN 203150163U
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Abstract
The utility model discloses a flame-retardant frequency-variable cable for coal mining machines. The flame-retardant frequency-variable cable comprises three power wire core conductors, three control wire core conductors and three ground wire core conductors. Each of the three power wire core conductors is sequentially coated with an ethylene-propylene rubber insulation layer and a semi-conductive tape shielding layer to form an insulation shielding power wire core; each of the three control wire core conductors is coated with a composite shielding layer to form a shielding control wire core; the ground wire core conductors are twisted into a bundle and are wrapped by a semi-conductive belting layer to form a central bundle; the insulation shielding power wire cores and the shielding control wire cores are distributed at the outer edge of the central bundle annularly and at intervals to form a cable core; and the cable core is sequentially coated with a highly-flame-retardant neoprene inner sheath layer, a main shielding layer and a highly-flame-retardant, oil-resistant and highly-tear-resistant neoprene outer sheath layer. The flame-retardant frequency-variable cable for coal mining machines is reasonable in structural design and has the characteristics of high flame retardancy, oil resistance, abrasion resistance, high tear resistance, high interference resistance, low noise, low energy consumption, stable speed control, flexibility and mobility.
Description
Technical field:
The utility model relates to mining cable, relates in particular to the fire-retardant frequency-changing cable of a kind of coal-winning machine.
Background technology:
As everyone knows, coal in China industry can be rated as China's first energy industry, namely is the production capacity rich and influential family, is again the big power consumer, also is the energy-saving potential rich and influential family simultaneously.Energy savings is a fundamental state policy of China, for energy savings, begun under the colliery to adopt variable-frequency motor to drive at coal-winning machine, this just needs with the fire-retardant frequency-changing cable of coal-winning machine, frequency-changing cable used on the coal-winning machine is different with common frequency-changing cable, common frequency-changing cable is that power core and ground core are combined into cable, adds screen again.And the used fire-retardant frequency-changing cable of coal-winning machine below the colliery except possessing common frequency-changing cable structure, also must possess the control core in its core, to the control of coal-winning machine equipment.Its structure be the power core, the shielded type cable of core and control core compound one.As you know, the power core is to transmit forceful electric power, and the control core is to transmit weak current, and it is combined with each other, and particularly as the wideer variable-frequency motor of modulating frequency, its cable high order harmonic component is very serious for the interference of control core.
At this kind situation, the fire-retardant frequency-changing cable of coal-winning machine practicality that needed designer's development and Design guarantees that it has that high flame retardant, the high and low noise of anti-interference, low energy consumption, speed regulating control are stable, softness is convenient to mobile characteristic.
The utility model content:
In order to remedy the prior art problem, the purpose of this utility model provides the fire-retardant frequency-changing cable of a kind of coal-winning machine, being applicable to that place, colliery coal-winning machine frequency conversion equipment connects uses, and has that high flame retardant, oil resistant, wear-resisting, high anti-tear, high noise immunity, low noise, low energy consumption, speed regulating control are stable, softness is convenient to mobile characteristic.
The technical solution of the utility model is as follows:
The fire-retardant frequency-changing cable of coal-winning machine, comprise three power line core conductors, three control line core conductors, three ground wire core conductors, it is characterized in that: described three power line core conductors are enclosed with ethylene propylene rubber insulated layer outward respectively successively, the semi-conductive tape screen constitutes insulation shielding power core; Three control line core conductors are coated with composite shielding layer outward respectively and constitute shielding control core, and described composite shielding layer adopts tinned copper wire braid shielded internal layer and the wrapped skin of aluminium foil composite band to constitute; The mutual stranded bunchy of described three ground wire core conductors also is surrounded with the semiconductive belting layer and constitutes central beam in the outside, the central beam outer is annular and be intervally distributed with insulation shielding power core, shielding control core constitutes cable core, and cable core is coated with high flame retardant neoprene inner restrictive coating, total screen, high flame retardant, oil resistant, high anti-tear neoprene external sheath layer outward successively.
The fire-retardant frequency-changing cable of described coal-winning machine is characterized in that: the internal layer count of described composite shielding layer is not less than 85%, total shielding surface of composite shielding layer is necessary 〉=every phase power line core conductor nominal cross 10%.
The fire-retardant frequency-changing cable of described coal-winning machine is characterized in that: 50% of the nominal cross of the summation of the nominal cross of described three ground wire core conductors and semiconductive lapping layer nominal cross 〉=every core conductor of power line mutually.
The utility model has the advantages that:
1, composite shielding layer adopts tinned copper wire braid shielded internal layer and the wrapped outer formation of aluminium foil composite band, count is not less than 85%, adopt the composite shielding layer structure to make cable have that mutual capacitance is little, capacitive unbalance is low, distributed inductance is little, the inductance resistance ratio is little, the anti-interference height, shield effectiveness is good, advantages such as speed regulating control is accurate, this is that general power and control composite cable are not available, possesses good bandability behind shielding control core and the insulation shielding power core stranding spaced apart, not easily broken core has improved the safety of coal-winning machine control system greatly.
2, ground wire core conductor extruded insulation not outward, directly wrapped with semi-conductive tape, semiconductive lapping layer and can contacting with control shielding control line core, and the screen area sum of ground wire core conductor and control line core conductor is not less than the power line core area half, with such structure as earth connection, puncture or earth fault when taking place in cable, and electric current can import underground fast, guarantees the fail safe in colliery.Each power line core conductor surface adopts semiconductive wrapped; when a phase damage in insulation; its power core semi-conductive layer links to each other with the ground connection heart yearn; cause single phase ground fault; make the one-phase ground protection action power dump; both can prevent that serious phase fault from taking place, and can prevent that again short circuiting arc from causing burning and the blast of gas, coal dust.
3, adopt tinned copper wire braid shielded structure, cable always shields density and is not less than 85%, adopt simultaneously total screen nominal cross necessary 〉=every phase power line core conductor nominal cross 10%, increase the shielding area coverage, accelerate the screen induced current and insert underground speed, reducing electric current is penetrated into screen and produces interference, reduce repeatedly reflection interference electromagnetic field, the frequency change of input cable and cable output and ripple distortion are frequently reduced, improve the authenticity of frequency-changing cable two ends frequency variable synchronous and transmission, and reduced the interference of cable to the outside.
4, adopt symmetrical structure (to circularize distribution along central beam, see in a triangle from the cross section) can homogenizing cable internal electric field, improve the balance of three-phase power core electromagnetic field, reduce even ripple and odd ripple in the high order harmonic component, thereby reduce the radiation hazradial bundle of high order harmonic component.
Description of drawings:
Fig. 1 is structural representation of the present utility model.
Embodiment:
Referring to Fig. 1:
The fire-retardant frequency-changing cable of coal-winning machine, comprise three power line core conductors 1, three control line core conductors 2,3, three power line core conductors of three ground wire core conductors, 1 outer ethylene propylene rubber insulated layer 4, the semi-conductive tape screen 5 formation insulation shielding power cores of being enclosed with successively respectively; Three control line core conductor 2 outer composite shielding layers 6 that are coated with respectively constitute shielding control core, and composite shielding layer 6 adopts tinned copper wire braid shielded internal layer 6-1 and the wrapped outer 6-2 of aluminium foil composite band to constitute; Three ground wire core conductor 3 mutual stranded bunchys also are surrounded with semiconductive belting layer 7 in the outside and constitute central beams, the central beam outer is annular and be intervally distributed with insulation shielding power core, shielding control core constitutes cable core, and cable core is coated with high flame retardant neoprene inner restrictive coating 8, total screen 9, high flame retardant, oil resistant, high anti-tear neoprene external sheath layer 10 outward successively.
The internal layer 6-1 count of composite shielding layer 6 is not less than 85%, composite shielding layer 6 total shielding surfaces are necessary 〉=every phase power line core conductor nominal cross 10%.
50% of the nominal cross of the summation of the nominal cross of three ground wire core conductors 3 and semiconductive lapping layer nominal cross 〉=every core conductor of power line mutually.
Claims (3)
1. fire-retardant frequency-changing cable of coal-winning machine, comprise three power line core conductors, three control line core conductors, three ground wire core conductors, it is characterized in that: described three power line core conductors are enclosed with ethylene propylene rubber insulated layer outward respectively successively, the semi-conductive tape screen constitutes insulation shielding power core; Three control line core conductors are coated with composite shielding layer outward respectively and constitute shielding control core, and described composite shielding layer adopts tinned copper wire braid shielded internal layer and the wrapped skin of aluminium foil composite band to constitute; The mutual stranded bunchy of described three ground wire core conductors also is surrounded with the semiconductive belting layer and constitutes central beam in the outside, the central beam outer is annular and be intervally distributed with insulation shielding power core, shielding control core constitutes cable core, and cable core is coated with high flame retardant neoprene inner restrictive coating, total screen, high flame retardant, oil resistant, high anti-tear neoprene external sheath layer outward successively.
2. the fire-retardant frequency-changing cable of coal-winning machine according to claim 1, it is characterized in that: the internal layer count of described composite shielding layer is not less than 85%, total shielding surface of composite shielding layer is necessary 〉=every phase power line core conductor nominal cross 10%.
3. the fire-retardant frequency-changing cable of coal-winning machine according to claim 1 is characterized in that: 50% of the nominal cross of the summation of the nominal cross of described three ground wire core conductors and semiconductive lapping layer nominal cross 〉=every core conductor of power line mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320016073 CN203150163U (en) | 2013-01-11 | 2013-01-11 | Flame-retardant frequency-variable cable for coal mining machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320016073 CN203150163U (en) | 2013-01-11 | 2013-01-11 | Flame-retardant frequency-variable cable for coal mining machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203150163U true CN203150163U (en) | 2013-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320016073 Expired - Fee Related CN203150163U (en) | 2013-01-11 | 2013-01-11 | Flame-retardant frequency-variable cable for coal mining machines |
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| CN (1) | CN203150163U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545032A (en) * | 2013-10-24 | 2014-01-29 | 兴乐电缆有限公司 | Cable for coal mine frequency conversion device with voltage of 1.9/3.3kv and below |
| CN103871593A (en) * | 2014-02-26 | 2014-06-18 | 安徽江淮电缆集团有限公司 | Waterproof wear-resistant variable frequency tensile power cable |
| CN103915195A (en) * | 2014-03-18 | 2014-07-09 | 安徽慧艺线缆集团有限公司 | Waterproof dual-shielding computer and meter control cable |
| CN107148656A (en) * | 2014-08-11 | 2017-09-08 | 克里斯多佛·史蒂德 | Cable |
-
2013
- 2013-01-11 CN CN 201320016073 patent/CN203150163U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545032A (en) * | 2013-10-24 | 2014-01-29 | 兴乐电缆有限公司 | Cable for coal mine frequency conversion device with voltage of 1.9/3.3kv and below |
| CN103871593A (en) * | 2014-02-26 | 2014-06-18 | 安徽江淮电缆集团有限公司 | Waterproof wear-resistant variable frequency tensile power cable |
| CN103915195A (en) * | 2014-03-18 | 2014-07-09 | 安徽慧艺线缆集团有限公司 | Waterproof dual-shielding computer and meter control cable |
| CN107148656A (en) * | 2014-08-11 | 2017-09-08 | 克里斯多佛·史蒂德 | Cable |
| CN107148656B (en) * | 2014-08-11 | 2019-10-01 | 克里斯多佛·史蒂德 | Cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130821 Termination date: 20190111 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |