CN103325489B - Lightning protected cable for communication base station - Google Patents
Lightning protected cable for communication base station Download PDFInfo
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- CN103325489B CN103325489B CN201310269250.0A CN201310269250A CN103325489B CN 103325489 B CN103325489 B CN 103325489B CN 201310269250 A CN201310269250 A CN 201310269250A CN 103325489 B CN103325489 B CN 103325489B
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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
Technical field
The invention belongs to technical field of cables, especially relate to communication base station lightning protected cable.
Background technology
Over nearly 20 years, China's information industry, with average annual 25% speed increase, leads over the development of other industries, has become the first pillar industry in industry.Estimate in coming 10 years, information industry will be turned over again.In communication industry product, there is the extraordinary lightning-proof optical cable product of the higher communication of security performance and will have good market prospects.Along with the 3G network communication network development, also the lightning protection measures of communication base station room will be considered, avoid because thunder and lightning causes that communication base station and electric power interrupts, machine room catches fire, large-area communication disruption will be brought, equipment the major accident such as to be burnt by thunderbolt, just needs the electric power between communication base station and steel tower, Signal transmissions product consider safer product.Along with the develop rapidly of 3G business, the construction scale of communication base station expands gradually, and 3G communication network technology is built, and at least the whole nation needs the base station of 300,000 3G communication networks, if each base station needs length to be the cable of about 100 meters, then this will be a larger market.
Both at home and abroad the lightning protection of cable is carried out to effective research and achieved good achievement.The applicant has also done a large amount of research and development in 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 used in the communication base station of operator.But they also have the following disadvantages: (1) ground plane adopts the mode of tiltedly bag, and speed of production is slower; (2) armour only serves the effect of armouring, and (3), after standing thunderbolt, the partial earthing layer in cable blows, and sheath is melted in cable core interval insulated wire cores is combined together, makes insulated wire cores be difficult to be separated; Waste disposal can only be made.Above-mentioned deficiency increases the maintenance cost after cable thunderbolt.
In addition, because communication base station lightning protected cable major part is positioned at base station, and base station is usually disposed in the outdoor, and infrequently safeguards, therefore, cable can adsorb a large amount of dusts, cause inconvenience to maintenance; In addition, have a large amount of cables in base station, therefore, in base station, temperature is general higher, and therefore, the oversheath for cable requires to have higher resistance to elevated temperatures.
Summary of the invention
In order to solve the problem, the object of the invention is the communication base station lightning protected cable disclosing a kind of new construction, it realizes by the following technical solutions.
Communication base station lightning protected cable, include cable core, inner sheath 6, armour 9, oversheath 10, ground plane 8, cable core is made up of light unit and electric unit, light unit is by Loose tube 4 and be positioned at that the many optical fibers 3 of Loose tube form, and electric unit is made up 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, 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 ground plane, and oversheath extrusion molding is coated on outside armour; Armour is one side film steel band, and the face that armour contacts with ground plane is non-overlay film face; First protective layer, the second protective layer are all mica tape; Described oversheath is made up of the raw material of following weight portion: 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 embodiment 2 of the present invention, 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 up of light unit and electric unit, light unit is by Loose tube 4 and be positioned at that the many optical fibers 3 of Loose tube form, and electric unit is made up 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, 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 ground plane, and oversheath extrusion molding is coated on outside armour; Armour is one side film steel band, and the face that armour contacts with ground plane is non-overlay film face; First protective layer, the second protective layer are all mica tape; Messenger wire sheath is coated on outside messenger wire, and dowel one end connects messenger wire sheath, the other end connects oversheath; Described oversheath is made up of the raw material of following weight portion: 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 up of many copper bars or aluminium bar.
Communication base station lightning protected cable described above, is characterized in that described ground plane is coated on outside the second protective layer the direction favouring cable core axis or the direction being parallel to cable core axis.
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 favouring cable core axis, coated pitch 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 cable core or is distributed in cable core in the mode that one direction spiral is stranded.
Communication base station lightning protected cable described above, is characterized in that described first protective layer is that the mode of longitudinal direction or spiral is coated on outside cable core; When longitudinal direction is coated, the overlapping widths of overlap joint is 2-4mm; During helical coated, overlap joint Duplication is 15%-30%.
Communication base station lightning protected cable described above, is characterized in that the material of described insulating barrier is 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, is characterized in that the material of described inner sheath is 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 first protective layer, the second protective layer is all synthetic mica tape, and the thickness of mica tape is 0.1mm-2mm.
In the present invention, ground plane is metal, and namely the inner face of armour is non-coating layer with ground plane contact-making surface, therefore is also metal level, make the contact that ground plane is not only adjacent, and armour has been carried out parallel connection, has made ground plane reach less resistance value; Standing thunderstorm hour, the short-time thermal amount of ground plane adds little, and the probability of blowing of being therefore struck by lightning reduces greatly; In addition, steel dress layer also serves armouring, against pressure, anti-effect of hitting.
In the present invention, the existence of the first protective layer, the second protective layer, has isolated heat widely, in thunderbolt situation, although may produce a large amount of heats, this heat, under the isolation of the first protective layer, the second protective layer, makes the work of the light unit in cable core, electric unit unaffected; In addition, thunderbolt high temperature can not enter cable core gap after inner sheath is melted, and therefore, after thunderbolt, when temperature declines, sheath still can solidify, and does not substantially affect cable performance, and it is quite convenient to safeguard.
Adopt the cable of cable of the present invention and non-structural improvement jointly to use, 516 communication base stations employ 2 years, the cable of non-structural improvement has 3 to be struck by lightning and can not normally use for a long time after being struck by lightning; And cable of the present invention receives 3 thunderbolts equally, but do not do any replacing use as usual.Applicant dissects by thunderbolt cable for 3; all the inner sheath material melted in the cable core gap of the cable of discovery non-structural improvement; inseparablely leave electric unit, light unit; and this bright cable; although owing to melting, inner sheath has occurred that the local of thickness is uneven; but do not find the inner sheath melted and the inner sheath melting after coagulation in cable core; electric unit, light unit are still separable; a bit do not have influenced; after strip off first protective layer, cable core still can be used in other cable.
Cable of the present invention, when ground plane and cable core axis being parallel, can produce together, not need other stranded operation in oversheath extrusion process, and therefore, speed of production is faster, cost is lower.
Cable of the present invention, owing to having HK type antistatic agent in jacket material, therefore, effectively can reduce the absorption of dust, make maintenance more convenient; In addition, due to the special formulation of jacket material, oversheath is had excellently has resistance to electric trace performance, high flame resistance; Through inspection, oversheath of the present invention has the oxygen index being greater than 45, and the oxygen index of conventional flame-proof material is only about 30; When the thickness of oversheath of the present invention is 2.0mm, withstands the high voltage test of 120KV, and the punch-through of oversheath has not occurred; And when adopting same flame-proof material or resistance to electric track resistant jacket material, same thickness, when 30KV, oversheath just there occurs and punctures.
Therefore, the present invention has following main beneficial effect: make simple, speed of production fast, ground plane resistivity is lower, maintenance cost is lower, dust adsorption less, more withstand voltage, fire resistance is better.
Accompanying drawing explanation
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, communication base station lightning protected cable, include cable core, inner sheath 6, armour 9, oversheath 10, ground plane 8, cable core is made up of light unit and electric unit, light unit is by Loose tube 4 and be positioned at that the many optical fibers 3 of Loose tube form, and electric unit is made up 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, 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 ground plane, and oversheath extrusion molding is coated on outside armour; Armour is one side film steel band, and the face that armour contacts with ground plane is non-overlay film face; First protective layer, the second protective layer are all mica tape; Described oversheath is made up of the raw material of following weight portion: 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, 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 up of light unit and electric unit, light unit is by Loose tube 4 and be positioned at that the many optical fibers 3 of Loose tube form, and electric unit is made up 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, 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 ground plane, and oversheath extrusion molding is coated on outside armour; Armour is one side film steel band, and the face that armour contacts with ground plane is non-overlay film face; First protective layer, the second protective layer are all mica tape; Messenger wire sheath is coated on outside messenger wire, and dowel one end connects messenger wire sheath, the other end connects oversheath; Described oversheath is made up of the raw material of following weight portion: 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 in above-mentioned arbitrary embodiment, is characterized in that described ground plane is made up of many copper bars or aluminium bar.
Communication base station lightning protected cable described in above-mentioned arbitrary embodiment, is characterized in that described ground plane is coated on outside the second protective layer the direction favouring cable core axis or the direction being parallel to cable core axis.
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 favouring cable core axis, coated pitch is 15-30 times of the second protective layer diameter.
Communication base station lightning protected cable described in above-mentioned arbitrary embodiment, is characterized in that described smooth unit and electric unit are that parallel mode is distributed in cable core or is distributed in cable core in the mode that one direction spiral is stranded.
Communication base station lightning protected cable described in above-mentioned arbitrary embodiment, is characterized in that described first protective layer is that the mode of longitudinal direction or spiral is coated on outside cable core; When longitudinal direction is coated, the overlapping widths of overlap joint is 2-4mm; During helical coated, overlap joint Duplication is 15%-30%.
Communication base station lightning protected cable described in above-mentioned arbitrary embodiment, is characterized in that the material of described insulating barrier is 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 in above-mentioned arbitrary embodiment, is characterized in that the material of described inner sheath is high density polyethylene (HDPE) or medium density polyethylene or low smoke and zero halogen polyethylene.
Communication base station lightning protected cable described in above-mentioned arbitrary embodiment, it is characterized in that described first protective layer, the second protective layer is all synthetic mica tape, and the thickness of mica tape is 0.1mm-2mm.
In the present invention, ground plane is metal, and namely the inner face of armour is non-coating layer with ground plane contact-making surface, therefore is also metal level, make the contact that ground plane is not only adjacent, and armour has been carried out parallel connection, has made ground plane reach less resistance value; Standing thunderstorm hour, the short-time thermal amount of ground plane adds little, and the probability of blowing of being therefore struck by lightning reduces greatly; In addition, steel dress layer also serves armouring, against pressure, anti-effect of hitting.
In the present invention, the existence of the first protective layer, the second protective layer, has isolated heat widely, in thunderbolt situation, although may produce a large amount of heats, this heat, under the isolation of the first protective layer, the second protective layer, makes the work of the light unit in cable core, electric unit unaffected; In addition, thunderbolt high temperature can not enter cable core gap after inner sheath is melted, and therefore, after thunderbolt, when temperature declines, sheath still can solidify, and does not substantially affect cable performance, and it is quite convenient to safeguard.
Adopt the cable of cable of the present invention and non-structural improvement jointly to use, 516 communication base stations employ 2 years, the cable of non-structural improvement has 3 to be struck by lightning and can not normally use for a long time after being struck by lightning; And cable of the present invention receives 3 thunderbolts equally, but do not do any replacing use as usual.Applicant dissects by thunderbolt cable for 3; all the inner sheath material melted in the cable core gap of the cable of discovery non-structural improvement; inseparablely leave electric unit, light unit; and this bright cable; although owing to melting, inner sheath has occurred that the local of thickness is uneven; but do not find the inner sheath melted and the inner sheath melting after coagulation in cable core; electric unit, light unit are still separable; a bit do not have influenced; after strip off first protective layer, cable core still can be used in other cable.
Cable of the present invention, when ground plane and cable core axis being parallel, can produce together, not need other stranded operation in oversheath extrusion process, and therefore, speed of production is faster, cost is lower.
Cable of the present invention, owing to having HK type antistatic agent in jacket material, therefore, effectively can reduce the absorption of dust, make maintenance more convenient; In addition, due to the special formulation of jacket material, oversheath is had excellently has resistance to electric trace performance, high flame resistance; Through inspection, oversheath of the present invention has the oxygen index being greater than 45, and the oxygen index of conventional flame-proof material is only about 30; When the thickness of oversheath of the present invention is 2.0mm, withstands the high voltage test of 120KV, and the punch-through of oversheath has not occurred; And when adopting same flame-proof material or resistance to electric track resistant jacket material, same thickness, when 30KV, oversheath just there occurs and punctures.
Therefore, the present invention has following main beneficial effect: make simple, speed of production fast, ground plane resistivity is lower, maintenance cost is lower, dust adsorption less, more withstand voltage, fire resistance is better.
The present invention is not limited to above-mentioned preferred forms, and should be appreciated that design of the present invention can be implemented to use by other various forms, they drop in protection scope of the present invention equally.
Claims (7)
1. communication base station lightning protected cable, include cable core, inner sheath, armour, oversheath, ground plane, cable core is made up of light unit and electric unit, light unit is by Loose tube and be positioned at that many optical fibers of Loose tube form, and electric unit is made up of conductor and the insulating barrier that envelopes conductor; It is characterized in that cable core is coated with the first protective layer, 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 ground plane, and oversheath extrusion molding is coated on outside armour; Armour is one side film steel band, and the face that armour contacts with ground plane is non-overlay film face; First protective layer, the second protective layer are all mica tape; Described oversheath is made up of the raw material of following weight portion: 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 according to claim 1, is characterized in that described ground plane is made up of many copper bars or aluminium bar.
3. communication base station lightning protected cable according to claim 1, is characterized in that described smooth unit and electric unit are that parallel mode is distributed in cable core or is distributed in cable core in the mode that one direction spiral is stranded.
4. communication base station lightning protected cable according to claim 1, is characterized in that described first protective layer is that the mode of longitudinal direction or spiral is coated on outside cable core; When longitudinal direction is coated, the overlapping widths of overlap joint is 2-4mm; During helical coated, overlap joint Duplication is 15%-30%.
5. communication base station lightning protected cable according to claim 1, is characterized in that the material of described insulating barrier is polyvinyl chloride or high density polyethylene (HDPE) or medium density polyethylene or low smoke and zero halogen polyethylene.
6. communication base station lightning protected cable according to claim 1, is characterized in that the material of described inner sheath is high density polyethylene (HDPE) or medium density polyethylene or low smoke and zero halogen polyethylene.
7. communication base station lightning protected cable according to claim 1, it is characterized in that described first protective layer, the second protective layer is all synthetic mica tape, and the thickness of mica tape is 0.1mm-2mm.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510098528.1A CN104681134B (en) | 2013-07-01 | 2013-07-01 | Lightning protected cable for communication base station |
| CN201310269250.0A CN103325489B (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 protected cable for communication base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310269250.0A CN103325489B (en) | 2013-07-01 | 2013-07-01 | Lightning protected cable for communication base station |
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| CN201510096140.8A Division CN104658657B (en) | 2013-07-01 | 2013-07-01 | Lightning protected cable for communication base station |
| CN201510098528.1A Division CN104681134B (en) | 2013-07-01 | 2013-07-01 | Lightning protected cable for communication base station |
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| CN103325489B true CN103325489B (en) | 2015-05-13 |
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Families Citing this family (5)
| 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 |
| CN105489280B (en) * | 2014-08-27 | 2018-02-09 | 国网江西省电力公司赣西供电分公司 | It is a kind of can displays temperature change cable insulating layer material |
| 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 |
| CN104700936A (en) * | 2014-09-15 | 2015-06-10 | 沈群华 | Submarine high-voltage cable and production method for same |
| CN104700934A (en) * | 2014-09-15 | 2015-06-10 | 沈群华 | Submarine high-voltage cable and production method for same |
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| US5189718A (en) * | 1991-04-02 | 1993-02-23 | Siecor Corporation | Composite cable containing light waveguides and electrical conductors |
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Address after: 215542 Jiangsu city of Suzhou province Changshou City Shajiabang town southeast of Changshu Development Zone, No. 8 Chang kunlu Patentee after: Jiangsu Zhongli group Limited by Share Ltd Address before: 215542 Jiangsu city of Suzhou province Changshou City Shajiabang town southeast of Changshu Development Zone, No. 8 Chang kunlu Patentee before: Zhongli Science & Technology Group Co., Ltd. |