CN103325489A - Lightning protected cable for communication base station - Google Patents

Lightning protected cable for communication base station Download PDF

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Publication number
CN103325489A
CN103325489A CN2013102692500A CN201310269250A CN103325489A CN 103325489 A CN103325489 A CN 103325489A CN 2013102692500 A CN2013102692500 A CN 2013102692500A CN 201310269250 A CN201310269250 A CN 201310269250A CN 103325489 A CN103325489 A CN 103325489A
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protective layer
cable
base station
coated
communication base
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CN103325489B (en
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王达伟
张兴飞
鲁芳
孔令蜜
项怡
殷苏
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Jiangsu Zhongli Group Co Ltd
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Zhongli Technology Group Co Ltd
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Priority to CN201310269250.0A priority Critical patent/CN103325489B/en
Priority to CN201510098528.1A priority patent/CN104681134B/en
Priority to CN201510096140.8A priority patent/CN104658657B/en
Publication of CN103325489A publication Critical patent/CN103325489A/en
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Abstract

The invention belongs to the technical field of cables and relates to a lightning protected cable for a communication base station. The lightning protected cable for the communication base station comprises a cable core, an inner protecting sleeve, an armor layer, an outer protecting sleeve and a ground layer. The lightning protected cable for the communication base station is characterized in that a first protecting layer is arranged outside the cable core, the inner protecting sleeve is arranged outside the first protecting layer, a second protecting layer is arranged outside the inner protecting sleeve, the ground layer is arranged outside the second protecting layer, the armor layer is arranged outside the ground layer, and the armor layer is coated with the outer protecting sleeve; the armor layer is a single-face film covering steel belt and the face, in contact with the ground layer, of the armor layer is a non-film-covering face; the first protecting layer and the second protecting layer are both mica tapes; the outer protecting sleeve comprises, by weight, the following raw materials of 71 parts of polyethylene, one part of anti-oxygen 1010, 12 parts of aluminum hydroxides, 0.5 part of HK-type antistatic agent, 3 parts of ethyl acetate, 1 part of carbon black, 10 parts of zirconium oxide and 1.5 parts of polyethylene wax. The lightning protected cable for the communication base station has the advantages of being simple in manufacturing, high in production speed, capable of enabling the electrical resisting rate of the ground layer to be low, low in maintaining cost, small in dust adsorption, pressure resistant, and good in flame resistance.

Description

The communication base station lightning protected cable
Technical field
The invention belongs to technical field of cables, especially relate to the communication base station lightning protected cable.
Background technology
Over nearly 20 years, China's information industry is led over the development of other industries with average annual 25% speed increase, has become the first pillar industry in the industry.Expectation is in coming 10 years, and information industry will be turned over again.In the communication industry product, have the higher communication of security performance and with extraordinary lightning-proof optical cable product good market prospects will be arranged.Along with the 3G network communication network development, also will consider the lightning protection measures of communication base station room, avoid catching fire because thunder and lightning causes communication base station and electric power interruption, machine room, to bring large-area communication disruption, equipment the major accident such as is burnt by thunderbolt, just need to electric power, signal transmission product between communication base station and steel tower consider safer product.Develop rapidly along with the 3G business, the construction scale of communication base station enlarges gradually, and the 3G communication network technology is built, and the whole nation needs the base station of 300,000 3G communication networks at least, if it is cable about 100 meters that each base station needs length, then this will be a larger market.
Carried out effective research and obtained preferably achievement for the lightning protection of cable both at home and abroad.The applicant has also done a large amount of research and development aspect lightning protected cable, as: denomination of invention is: self-supporting lightning-proof power cable, the patent No. are: 200920150584.5; Denomination of invention is: lightning-proof power cable, the patent No. are: 200920150583.0; Denomination of invention is: lightning-proof optical cable, the patent No. are: 200920150582.6; Denomination of invention is: have the lightning-proof power cable of reinforced layer, the patent No. to be: 200910140719.4; Denomination of invention is: multigroup lightning protection optical cable, the patent No. are: 200910140717.5; Denomination of invention is: self-supporting lightning-proof optical cable, the patent No. are: the patents such as 200910140715.6 have all formed product and have used in operator's communication base station.But they also have the following disadvantages: (1) ground plane adopts the tiltedly mode of bag, and speed of production is slower; (2) armour has only played the effect of armouring, and after standing thunderbolt, the partial earthing layer in the cable blows, and sheath is melted in the cable core interval insulated wire cores is combined together (3), makes insulated wire cores be difficult to separate; Can only make waste product processes.Above-mentioned deficiency has strengthened the maintenance cost after the cable thunderbolt.
In addition, because communication base station is positioned at the base station with the lightning protected cable major part, and that the base station is arranged on usually is outdoor, and does not often safeguard, therefore, can adsorb a large amount of dusts on the cable, has caused inconvenience to maintenance; In addition, have a large amount of cables in the base station, therefore, temperature is generally higher in the base station, therefore, requires to have higher resistance to elevated temperatures for the oversheath of cable.
Summary of the invention
In order to address the above problem, the objective of the invention is to disclose a kind of communication base station lightning protected cable of new construction, it is realized by the following technical solutions.
The communication base station lightning protected cable, include cable core, inner sheath 6, armour 9, oversheath 10, ground plane 8, cable core is made of light unit and electric unit, the light unit is by loose sleeve pipe 4 and be positioned at that the many optical fibers 3 of loose sleeve pipe consist of, and electric unit is made of conductor 1 and the insulating barrier 2 that envelopes conductor; It is characterized in that cable core is coated with the first protective layer 5, the inner sheath extrusion molding is coated on outside the first protective layer, inner sheath is coated with the second protective layer 7, ground plane is positioned at outside the second protective layer, and armour is coated on outside the ground plane, and the oversheath extrusion molding is coated on outside the armour; Armour is the one side film steel band, and the face that armour contacts with ground plane is non-overlay film face; The first protective layer, the second protective layer all are mica tape; Described oversheath is that the raw material by following weight portion consists of: polyethylene: 71 parts, antioxidant 1010: 1 part, aluminium hydroxide: 12 parts, HK type antistatic agent: 0.5 part, ethyl acetate: 3 parts, carbon black: 1 part, zirconia: 10 parts, Tissuemat E: 1.5 parts.
In the embodiment 2 of the present invention, the communication base station lightning protected cable, include cable core, inner sheath 6, armour 9, oversheath 10, ground plane 8, dowel 11, messenger wire 13, messenger wire sheath 12, cable core is made of light unit and electric unit, the light unit is by loose sleeve pipe 4 and be positioned at that the many optical fibers 3 of loose sleeve pipe consist of, and electric unit is made of conductor 1 and the insulating barrier 2 that envelopes conductor; It is characterized in that cable core is coated with the first protective layer 5, the inner sheath extrusion molding is coated on outside the first protective layer, inner sheath is coated with the second protective layer 7, ground plane is positioned at outside the second protective layer, and armour is coated on outside the ground plane, and the oversheath extrusion molding is coated on outside the armour; Armour is the one side film steel band, and the face that armour contacts with ground plane is non-overlay film face; The first protective layer, the second protective layer all are mica tape; The messenger wire sheath is coated on outside the messenger wire, and dowel one end connects the messenger wire sheath, the other end connects oversheath; Described oversheath is that the raw material by following weight portion consists of: polyethylene: 71 parts, antioxidant 1010: 1 part, aluminium hydroxide: 12 parts, HK type antistatic agent: 0.5 part, ethyl acetate: 3 parts, carbon black: 1 part, zirconia: 10 parts, Tissuemat E: 1.5 parts.
Communication base station lightning protected cable described above is characterized in that described ground plane is made of many copper bars or aluminium bar.
Communication base station lightning protected cable described above is characterized in that described ground plane is that the direction that favours the direction of cable core axis or be parallel to the cable core axis is coated on outside the second protective layer.
Communication base station lightning protected cable described above, when it is characterized in that described ground plane is coated on outside the second protective layer with the direction that favours the cable core axis, the pitch of coating is 15-30 times of the second protective layer diameter.
Communication base station lightning protected cable described above is characterized in that described smooth unit and electric unit are that parallel mode is distributed in the cable core or is distributed in the cable core in the stranded mode of one direction spiral.
Communication base station lightning protected cable described above, it is characterized in that described the first protective layer be vertically or the mode of spiral be coated on outside the cable core; When vertically coating, the overlapping width of overlap joint is 2-4mm; During helical coated, the overlap joint Duplication is 15%-30%.
Communication base station lightning protected cable described above, the material that it is characterized in that described insulating barrier are polyvinyl chloride or high density polyethylene (HDPE) or medium density polyethylene or low smoke and zero halogen polyethylene.
Communication base station lightning protected cable described above, the material that it is characterized in that described inner sheath are high density polyethylene (HDPE) or medium density polyethylene or low smoke and zero halogen polyethylene.
Communication base station lightning protected cable described above it is characterized in that described the first protective layer, the second protective layer all are synthetic mica tapes, and the thickness of mica tape is 0.1mm-2mm.
Among the present invention, ground plane is metal, and the inner face of armour is non-coating layer with the ground plane contact-making surface namely, therefore also be metal level, makes not only adjacent contact of ground plane, and armour carried out parallel connection with it, makes ground plane reach less resistance value; Standing thunderstorm hour, the in short-term caloric value of ground plane adds little, and the probability of blowing of therefore being struck by lightning reduces greatly; In addition, steel dress layer has also played armouring, anti-pressure, anti-effect of hitting.
Among the present invention, heat has been isolated in the existence of the first protective layer, the second protective layer widely, in the thunderbolt situation, although may produce a large amount of heats, this heat makes the work of the interior light unit of cable core, electric unit unaffected under the isolation of the first protective layer, the second protective layer; In addition, thunderbolt high temperature can not enter the cable core gap after inner sheath is melted, and therefore, after the thunderbolt, during drop in temperature, sheath still can solidify, and does not substantially affect cable performance, and it is quite convenient to safeguard.
Adopt cable of the present invention and the cable that does not improve structure jointly to use, used 2 years at 516 communication base stations, can not normally use for a long time after the cable that does not improve structure has 3 to be struck by lightning and to be struck by lightning; And cable of the present invention has been subject to 3 thunderbolts equally, does not as usual use but do any replacing.The applicant dissects for 3 cables that are struck by lightning; finding not improve in the cable core gap of cable of structure all is the inner sheath material that melts; inseparable electric unit, the light unit of leaving; and this bright cable; although inner sheath is because the local inhomogeneous of thickness appearred in thawing; but do not find the inner sheath that melts and the inner sheath that melts after coagulation in the cable core; electric unit, light unit are still separable; a bit do not have influenced; behind strip off the first protective layer, cable core still can be used in other the cable.
Cable of the present invention when ground plane is parallel with the cable core axis, can be produced in the oversheath extrusion process together, does not need other stranded operation, and therefore, speed of production is faster, cost is lower.
Cable of the present invention owing to having HK type antistatic agent in the jacket material, therefore, can reduce the absorption of dust effectively, makes maintenance more convenient; In addition, because the special formulation of jacket material makes oversheath have good have anti-electric trace performance, high flame resistance; Through check, oversheath of the present invention has the oxygen index greater than 45, and the oxygen index of flame-proof material commonly used only is about 30; When the thickness of oversheath of the present invention is 2.0mm, withstood the high voltage test of 120KV, and the punch-through of oversheath has not occured; And when adopting same flame-proof material or anti-electric track resistant jacket material, same thickness, puncture has just occured in oversheath when 30KV.
Therefore, the present invention has following main beneficial effect: making is simple, speed of production is fast, and ground plane resistivity is lower, maintenance cost is lower, dust adsorbs still less, more withstand voltage, fire resistance is better.
Description of drawings
Fig. 1 is the perspective view of the invention process example 1.
Fig. 2 is the cross-sectional structure schematic diagram that Fig. 1 amplifies.
Fig. 3 is the cross-sectional structure schematic diagram of the invention process example 2.
Embodiment
Embodiment 1
Ask for an interview Fig. 1 and Fig. 2, the communication base station lightning protected cable, include cable core, inner sheath 6, armour 9, oversheath 10, ground plane 8, cable core is made of light unit and electric unit, the light unit is by loose sleeve pipe 4 and be positioned at that the many optical fibers 3 of loose sleeve pipe consist of, and electric unit is made of conductor 1 and the insulating barrier 2 that envelopes conductor; It is characterized in that cable core is coated with the first protective layer 5, the inner sheath extrusion molding is coated on outside the first protective layer, inner sheath is coated with the second protective layer 7, ground plane is positioned at outside the second protective layer, and armour is coated on outside the ground plane, and the oversheath extrusion molding is coated on outside the armour; Armour is the one side film steel band, and the face that armour contacts with ground plane is non-overlay film face; The first protective layer, the second protective layer all are mica tape; Described oversheath is that the raw material by following weight portion consists of: polyethylene: 71 parts, antioxidant 1010: 1 part, aluminium hydroxide: 12 parts, HK type antistatic agent: 0.5 part, ethyl acetate: 3 parts, carbon black: 1 part, zirconia: 10 parts, Tissuemat E: 1.5 parts.
Embodiment 2
Ask for an interview Fig. 3, and with reference to figure 1 and Fig. 2, the communication base station lightning protected cable, include cable core, inner sheath 6, armour 9, oversheath 10, ground plane 8, dowel 11, messenger wire 13, messenger wire sheath 12, cable core is made of light unit and electric unit, the light unit is by loose sleeve pipe 4 and be positioned at that the many optical fibers 3 of loose sleeve pipe consist of, and electric unit is made of conductor 1 and the insulating barrier 2 that envelopes conductor; It is characterized in that cable core is coated with the first protective layer 5, the inner sheath extrusion molding is coated on outside the first protective layer, inner sheath is coated with the second protective layer 7, ground plane is positioned at outside the second protective layer, and armour is coated on outside the ground plane, and the oversheath extrusion molding is coated on outside the armour; Armour is the one side film steel band, and the face that armour contacts with ground plane is non-overlay film face; The first protective layer, the second protective layer all are mica tape; The messenger wire sheath is coated on outside the messenger wire, and dowel one end connects the messenger wire sheath, the other end connects oversheath; Described oversheath is that the raw material by following weight portion consists of: polyethylene: 71 parts, antioxidant 1010: 1 part, aluminium hydroxide: 12 parts, HK type antistatic agent: 0.5 part, ethyl acetate: 3 parts, carbon black: 1 part, zirconia: 10 parts, Tissuemat E: 1.5 parts.
The described communication base station lightning protected cable of above-mentioned arbitrary embodiment is characterized in that described ground plane is made of many copper bars or aluminium bar.
The described communication base station lightning protected cable of above-mentioned arbitrary embodiment is characterized in that described ground plane is that the direction that favours the direction of cable core axis or be parallel to the cable core axis is coated on outside the second protective layer.
Communication base station lightning protected cable described above, when it is characterized in that described ground plane is coated on outside the second protective layer with the direction that favours the cable core axis, the pitch of coating is 15-30 times of the second protective layer diameter.
The described communication base station lightning protected cable of above-mentioned arbitrary embodiment is characterized in that described smooth unit and electric unit are that parallel mode is distributed in the cable core or is distributed in the cable core in the stranded mode of one direction spiral.
The described communication base station lightning protected cable of above-mentioned arbitrary embodiment, it is characterized in that described the first protective layer be vertically or the mode of spiral be coated on outside the cable core; When vertically coating, the overlapping width of overlap joint is 2-4mm; During helical coated, the overlap joint Duplication is 15%-30%.
The described communication base station lightning protected cable of above-mentioned arbitrary embodiment, the material that it is characterized in that described insulating barrier are polyvinyl chloride or high density polyethylene (HDPE) or medium density polyethylene or low smoke and zero halogen polyethylene.
The described communication base station lightning protected cable of above-mentioned arbitrary embodiment, the material that it is characterized in that described inner sheath are high density polyethylene (HDPE) or medium density polyethylene or low smoke and zero halogen polyethylene.
The described communication base station lightning protected cable of above-mentioned arbitrary embodiment it is characterized in that described the first protective layer, the second protective layer all are synthetic mica tapes, and the thickness of mica tape is 0.1mm-2mm.
Among the present invention, ground plane is metal, and the inner face of armour is non-coating layer with the ground plane contact-making surface namely, therefore also be metal level, makes not only adjacent contact of ground plane, and armour carried out parallel connection with it, makes ground plane reach less resistance value; Standing thunderstorm hour, the in short-term caloric value of ground plane adds little, and the probability of blowing of therefore being struck by lightning reduces greatly; In addition, steel dress layer has also played armouring, anti-pressure, anti-effect of hitting.
Among the present invention, heat has been isolated in the existence of the first protective layer, the second protective layer widely, in the thunderbolt situation, although may produce a large amount of heats, this heat makes the work of the interior light unit of cable core, electric unit unaffected under the isolation of the first protective layer, the second protective layer; In addition, thunderbolt high temperature can not enter the cable core gap after inner sheath is melted, and therefore, after the thunderbolt, during drop in temperature, sheath still can solidify, and does not substantially affect cable performance, and it is quite convenient to safeguard.
Adopt cable of the present invention and the cable that does not improve structure jointly to use, used 2 years at 516 communication base stations, can not normally use for a long time after the cable that does not improve structure has 3 to be struck by lightning and to be struck by lightning; And cable of the present invention has been subject to 3 thunderbolts equally, does not as usual use but do any replacing.The applicant dissects for 3 cables that are struck by lightning; finding not improve in the cable core gap of cable of structure all is the inner sheath material that melts; inseparable electric unit, the light unit of leaving; and this bright cable; although inner sheath is because the local inhomogeneous of thickness appearred in thawing; but do not find the inner sheath that melts and the inner sheath that melts after coagulation in the cable core; electric unit, light unit are still separable; a bit do not have influenced; behind strip off the first protective layer, cable core still can be used in other the cable.
Cable of the present invention when ground plane is parallel with the cable core axis, can be produced in the oversheath extrusion process together, does not need other stranded operation, and therefore, speed of production is faster, cost is lower.
Cable of the present invention owing to having HK type antistatic agent in the jacket material, therefore, can reduce the absorption of dust effectively, makes maintenance more convenient; In addition, because the special formulation of jacket material makes oversheath have good have anti-electric trace performance, high flame resistance; Through check, oversheath of the present invention has the oxygen index greater than 45, and the oxygen index of flame-proof material commonly used only is about 30; When the thickness of oversheath of the present invention is 2.0mm, withstood the high voltage test of 120KV, and the punch-through of oversheath has not occured; And when adopting same flame-proof material or anti-electric track resistant jacket material, same thickness, puncture has just occured in oversheath when 30KV.
Therefore, the present invention has following main beneficial effect: making is simple, speed of production is fast, and ground plane resistivity is lower, maintenance cost is lower, dust adsorbs still less, more withstand voltage, fire resistance is better.
The present invention is not limited to above-mentioned preferred forms, should be appreciated that design of the present invention can be by other various forms enforcement utilizations, and they drop in protection scope of the present invention equally.

Claims (10)

1. communication base station lightning protected cable, include cable core, inner sheath, armour, oversheath, ground plane, cable core is made of light unit and electric unit, the light unit is by loose sleeve pipe and be positioned at that many optical fibers of loose sleeve pipe consist of, and electric unit is made of conductor and the insulating barrier that envelopes conductor; It is characterized in that cable core is coated with the first protective layer, the inner sheath extrusion molding is coated on outside the first protective layer, inner sheath is coated with the second protective layer, ground plane is positioned at outside the second protective layer, and armour is coated on outside the ground plane, and the oversheath extrusion molding is coated on outside the armour; Armour is the one side film steel band, and the face that armour contacts with ground plane is non-overlay film face; The first protective layer, the second protective layer all are mica tape; Described oversheath is that the raw material by following weight portion consists of: polyethylene: 71 parts, antioxidant 1010: 1 part, aluminium hydroxide: 12 parts, HK type antistatic agent: 0.5 part, ethyl acetate: 3 parts, carbon black: 1 part, zirconia: 10 parts, Tissuemat E: 1.5 parts.
2. communication base station lightning protected cable, include cable core, inner sheath, armour, oversheath, ground plane, dowel, messenger wire, messenger wire sheath, cable core is made of light unit and electric unit, the light unit is by loose sleeve pipe and be positioned at that many optical fibers of loose sleeve pipe consist of, and electric unit is made of conductor and the insulating barrier that envelopes conductor; It is characterized in that cable core is coated with the first protective layer, the inner sheath extrusion molding is coated on outside the first protective layer, inner sheath is coated with the second protective layer, ground plane is positioned at outside the second protective layer, and armour is coated on outside the ground plane, and the oversheath extrusion molding is coated on outside the armour; Armour is the one side film steel band, and the face that armour contacts with ground plane is non-overlay film face; The first protective layer, the second protective layer all are mica tape; The messenger wire sheath is coated on outside the messenger wire, and dowel one end connects the messenger wire sheath, the other end connects oversheath; Described oversheath is that the raw material by following weight portion consists of: polyethylene: 71 parts, antioxidant 1010: 1 part, aluminium hydroxide: 12 parts, HK type antistatic agent: 0.5 part, ethyl acetate: 3 parts, carbon black: 1 part, zirconia: 10 parts, Tissuemat E: 1.5 parts.
3. according to claim 1 or communication base station lightning protected cable claimed in claim 2, it is characterized in that described ground plane is made of many copper bars or aluminium bar.
4. according to claim 1 or communication base station lightning protected cable claimed in claim 2, it is characterized in that described ground plane is that the direction that favours the direction of cable core axis or be parallel to the cable core axis is coated on outside the second protective layer.
5. communication base station lightning protected cable according to claim 4, when it is characterized in that described ground plane is coated on outside the second protective layer with the direction that favours the cable core axis, the pitch of coating be the second protective layer diameter 15-30 doubly.
6. according to claim 1 or communication base station lightning protected cable claimed in claim 2, it is characterized in that described smooth unit and electric unit are that parallel mode is distributed in the cable core or in the stranded mode of one direction spiral and is distributed in the cable core.
7. according to claim 1 or communication base station lightning protected cable claimed in claim 2, it is characterized in that described the first protective layer be vertically or the mode of spiral be coated on outside the cable core; When vertically coating, the overlapping width of overlap joint is 2-4mm; During helical coated, the overlap joint Duplication is 15%-30%.
8. according to claim 1 or communication base station lightning protected cable claimed in claim 2, the material that it is characterized in that described insulating barrier is polyvinyl chloride or high density polyethylene (HDPE) or medium density polyethylene or low smoke and zero halogen polyethylene.
9. according to claim 1 or communication base station lightning protected cable claimed in claim 2, the material that it is characterized in that described inner sheath is high density polyethylene (HDPE) or medium density polyethylene or low smoke and zero halogen polyethylene.
10. according to claim 1 or communication base station lightning protected cable claimed in claim 2, it is characterized in that described the first protective layer, the second protective layer all are synthetic mica tapes, and the thickness of mica tape is 0.1mm-2mm.
CN201310269250.0A 2013-07-01 2013-07-01 Lightning protected cable for communication base station Active CN103325489B (en)

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CN201310269250.0A CN103325489B (en) 2013-07-01 2013-07-01 Lightning protected cable for communication base station
CN201510098528.1A CN104681134B (en) 2013-07-01 2013-07-01 Lightning protected cable for communication base station
CN201510096140.8A CN104658657B (en) 2013-07-01 2013-07-01 Lightning protection cables for communication base stations

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CN104008818A (en) * 2014-06-07 2014-08-27 吴俊� Lightning protection photoelectric composite cable for communication base station
CN104332219A (en) * 2014-08-27 2015-02-04 沈群华 Cable capable of displaying whether in work state
CN104376904A (en) * 2014-09-15 2015-02-25 沈群华 Submarine high voltage cable and manufacturing method thereof
CN104700934A (en) * 2014-09-15 2015-06-10 沈群华 Submarine high-voltage cable and production method for same
CN104700936A (en) * 2014-09-15 2015-06-10 沈群华 Submarine high-voltage cable and production method for same

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CN101887777A (en) * 2009-05-11 2010-11-17 中利科技集团股份有限公司 Lightning protection power cable with reinforced layer
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CN101942136A (en) * 2010-09-15 2011-01-12 镇国广 Polyethylene cable material with energy conservation, environmental protection and environmental stress cracking resistance
CN102504386A (en) * 2011-10-26 2012-06-20 江苏恒峰线缆有限公司 Antistatic polyethylene material and production method thereof
CN102592746A (en) * 2012-04-07 2012-07-18 常熟市谷雷特机械产品设计有限公司 Photoelectric composite cable with rubber sheath

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US5189718A (en) * 1991-04-02 1993-02-23 Siecor Corporation Composite cable containing light waveguides and electrical conductors
CN101320602A (en) * 2008-06-13 2008-12-10 宜兴市兴海电线电器有限公司 Modified PE sheath for cold resistant cable, insulation material and manufacturing method thereof
CN101887781A (en) * 2009-05-11 2010-11-17 中利科技集团股份有限公司 Self-supporting lightning-proof optical cable
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104008818A (en) * 2014-06-07 2014-08-27 吴俊� Lightning protection photoelectric composite cable for communication base station
CN104332219A (en) * 2014-08-27 2015-02-04 沈群华 Cable capable of displaying whether in work state
CN104376904A (en) * 2014-09-15 2015-02-25 沈群华 Submarine high voltage cable and manufacturing method thereof
CN104700934A (en) * 2014-09-15 2015-06-10 沈群华 Submarine high-voltage cable and production method for same
CN104700936A (en) * 2014-09-15 2015-06-10 沈群华 Submarine high-voltage cable and production method for same
CN106024104A (en) * 2014-09-15 2016-10-12 苏州高精特专信息科技有限公司 Inner sheath for seafloor high-voltage power cable and manufacturing method for inner sheath
CN104376904B (en) * 2014-09-15 2017-02-22 盐城利维线缆有限公司 Submarine high voltage cable and manufacturing method thereof

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