CN109036663A - The compound down conductor of carbon fiber-containing layer soft graphite - Google Patents
The compound down conductor of carbon fiber-containing layer soft graphite Download PDFInfo
- Publication number
- CN109036663A CN109036663A CN201810725921.2A CN201810725921A CN109036663A CN 109036663 A CN109036663 A CN 109036663A CN 201810725921 A CN201810725921 A CN 201810725921A CN 109036663 A CN109036663 A CN 109036663A
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- Prior art keywords
- graphite
- carbon fiber
- layer
- soft graphite
- down conductor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/2806—Protection against damage caused by corrosion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
Abstract
The invention discloses a kind of compound down conductors of carbon fiber-containing layer soft graphite, the down conductor is successively made of carbon fiber braiding layer, soft graphite braiding layer, soft graphite harness from outside to inside, the carbon fiber braiding layer with a thickness of 2-4mm, the thickness of the soft graphite line braiding layer is degree 2-4mm, and the radius of the soft graphite harness is 6-10mm.Of the invention has good electric conductivity and corrosion resistance, and under lightning current impact, current density is evenly distributed, and earthing material utilization rate is high, while the graphite for avoiding soft graphite braiding layer falls off and cause the problem of internal toughened fiber exposure, and safety is higher；Outer layer carbon fiber layer is wear-resisting, endurance, and construction is more convenient for transport, substantially prolongs the service life of down conductor.Soft graphite downlead surface layer is replaced with one layer of carbon fiber by the present invention, protects internal flexible graphite layer, resistance change rate is smaller under high/low temperature, bending, abrasion condition, more stable.
Description
Technical field
The invention belongs to Lightning protection fields, and in particular under a kind of compound grounding lead of carbon fiber-containing layer soft graphite
Line.
Background technique
Currently, well known tower grounding downlead is made of galvanized steel, copper facing Steel material, when being struck by lightning, under drawing
Lightning current can timely be introduced the grounded screen under placing into the soil by line, to being dissipated lightning current by grounded screen to distal end.But
It is that some is to be subjected to rainwater for a long time more than upper soll layer due to downlead, the equal environment that are exposed to the sun influence, and galvanized steel material exists
Serious corrosion will occur for 3-5, and copper facing Steel material can accelerate the corrosion of internal steel in the case where coating is impaired, frequently
Tower grounding downlead labor intensive, material resources are replaced, and once fails to replace the property that will cause tower grounding downlead in time
It can decline, influence the stabilization of earthed system, there are security risks.
The graphite linings of the compound down conductor of soft graphite are will to form graphite worm by oxidation processes and high temperature puffing,
It is prepared by roll-in, thermoplastic and twisted wire moulding process.Outside being exposed to for a long time as downlead, irradiated for a long time by sunlight,
Rainwater influences, and graphite can constantly fall off to expose internal toughened fiber, larger so as to cause change in resistance, or even causes table
Layer graphite line loosens, and influences downlead performance, if even there is some potential safety problemss for replacement not in time.
Carbon fiber is a kind of emerging fibrous material, have small high temperature resistant, corrosion-resistant, endurance, density, conductive heat transfer,
A series of tencel for excellent properties such as thermal expansion coefficient is low, it is compound both to have can be used as structural material carrying, can also be used as
Functional material plays a role.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of compound ground connection of carbon fiber-containing braiding layer soft graphite
Lightning current can not only be introduced the grounded screen under placing into the soil in time by downlead, while affected by environment smaller, avoid shaft tower
The corrosion of down conductor the environment layer graphite such as solves the compound earthing material long-term rain of soft graphite, is exposed to the sun and falling off
Problem, the service life is longer, and construction is more convenient for transport.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of compound down conductor of carbon fiber-containing layer soft graphite, the down conductor is from outside to inside successively by carbon fiber
Braiding layer, soft graphite braiding layer, soft graphite harness is tieed up to constitute.
The carbon fiber braiding layer with a thickness of 2-4mm.
The thickness of the soft graphite line braiding layer is degree 2-4mm.
The radius of the soft graphite harness is 6-10mm.
The carbon fiber braiding layer is that carbon fiber bundle is wound in by more carbon fiber wires, carbon fiber bundle by double track weave or
The more rails of person are knitted to form carbon fiber braiding layer.
The soft graphite braiding layer is will to form graphite worm by oxidation processes and high temperature puffing, passes through roll-in, heat
Modeling and twisted wire moulding process are prepared into soft graphite beam, and graphite beam is knitted to form soft graphite braiding by double track or more rails
Layer.
The soft graphite harness is that more graphite Shu Buxu are wound, and directly other are more centered on single graphite beam
Root graphite beam arranges graphite beam layer around center graphite beam.
The graphite beam adds glass fibre as toughened fiber during roll-in forms Graphite cloth, utilizes aqueous pressure
Quick glue is bonded, then makes glass fibre in every graphite beam by twisted wire moulding process.
Beneficial effects of the present invention: 1, the compound down conductor of carbon fiber-containing layer soft graphite of the invention can be to avoid bar
Tower down conductor corrode caused by the decline of downlead performance, avoid flexible graphite material because being exposed to the sun for a long time, the environment such as rainwater
Under the influence of graphite fall off, transport construction is more convenient, make downlead part and the compound ground connection web material of buried soft graphite
Package integral avoids the corrosion of joining place.
2, since carbon fiber and the compound down conductor of soft graphite all have corrosion resistant characteristic, it can reach and keep away
Exempt from the purpose of tower grounding downlead corrosion, simultaneously because carbon fiber has high temperature resistant, corrosion-resistant, endurance, tensile strength is high
The characteristics of, the surface layer that braiding is wrapped in the compound down conductor of soft graphite plays a protective role to Flexible Graphite Composites,
Achieve the purpose that avoid flexible graphite material because being exposed to the sun for a long time, graphite falls off under the influence of the environment such as rainwater.
3, soft graphite downlead surface layer is replaced with one layer of carbon fiber by the present invention, protects internal flexible graphite layer, together
Shi Liyong carbon fiber is wear-resisting, and the characteristics such as high temperature resistant are not only avoided because long-term sunlight irradiates, and what graphite fell off under the influence of rainwater asks
Topic, and resistance change rate is smaller under high/low temperature, bending, abrasion condition, it is more stable.And add after carbon fiber-containing layer
Under lightning current impact, current density distribution is more uniform, and earthing material utilization rate is higher.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the compound down conductor of carbon fiber-containing layer soft graphite of the present invention.
Fig. 2 is the structural schematic diagram of the compound down conductor of soft graphite.
Fig. 3 is the scheme of installation of the compound down conductor of carbon fiber-containing layer soft graphite of the present invention.
Specific embodiment
Combined with specific embodiments below, the present invention will be further described.It should be understood that following embodiment is merely to illustrate this
The person skilled in the art of the range of invention and is not intended to limit the present invention, the field can make one according to the content of foregoing invention
A little nonessential modifications and adaptations.
As shown in Figure 1, a kind of compound down conductor of carbon fiber-containing layer soft graphite, the down conductor is from outside to inside
Successively be made of carbon fiber braiding layer 1, soft graphite braiding layer 2, soft graphite harness 3, carbon fiber braiding layer with a thickness of 2-
4mm, the thickness of the soft graphite line braiding layer are degree 2-4mm, and the radius of the soft graphite harness is 6-10mm.
Carbon fiber braiding layer is that carbon fiber bundle is wound in by more carbon fiber wires, and carbon fiber bundle passes through double track braiding or more
Rail is knitted to form carbon fiber braiding layer.Soft graphite braiding layer is will to form graphite worm by oxidation processes and high temperature puffing,
It is prepared into soft graphite beam by roll-in, thermoplastic and twisted wire moulding process, graphite beam is knitted to form soft by double track or more rails
Property graphite braiding layer.Soft graphite harness is that more graphite Shu Buxu are wound, directly centered on single graphite beam other
More graphite beams arrange graphite beam layer around center graphite beam, and graphite beam adds glass fibers during roll-in forms Graphite cloth
Dimension is used as toughened fiber, is bonded using water-borne pressure sensitive adhesive, then make glass fibre in every graphite by twisted wire moulding process
Shu Zhong.
As shown in Fig. 2, the compound down conductor of traditional soft graphite is from outside to inside successively by soft graphite braiding layer I
2 ', soft graphite braiding layer II 2 and soft graphite harness 3 are constituted, and soft graphite downlead surface layer is replaced with one layer by the present invention
Carbon fiber braiding layer 1 protects internal flexible graphite layer, while wear-resisting using carbon fiber, and the characteristics such as high temperature resistant not only avoid
Because long-term sunlight irradiates, the problem of graphite falls off under the influence of rainwater, and the resistance variations under high/low temperature, bending, abrasion condition
Rate is smaller, more stable.And it adds after carbon fiber-containing layer under lightning current impact, current density distribution is more uniform, ground connection
Stock utilization is higher.
Test data comparison: before and after the test by each material under the conditions of high temperature tolerance test, cripping test, wear test
Resistance change rate analyzes the compound down conductor of soft graphite, the compound down conductor of soft graphite of carbon fiber-containing braiding layer exists
Stability under experimental condition.It tests every group to carry out 3 times, the test product specification of test is Φ 20mm × 300mm, table 1.1-
2.4 be the test data under each experimental condition, and table 2.5 is that the average value of all test results is obtained total comparison of test results
Table.By test data as can be seen that the compound down conductor of carbon fiber-containing layer soft graphite is in high temperature, low temperature, bending, abrasion
Resistance change rate under experimental condition is less than the compound down conductor of soft graphite, therefore carbon fiber-containing layer soft graphite is compound
Down conductor is more stable into use process in transport construction.
One, the compound ground line test result of carbon fiber-containing layer soft graphite:
(1) high temperature tolerance is tested
Using the resistance of QJ44 direct-flow double bridge measurement test product before test, every section is calculated using resistivity calculation formula
The resistivity of test product is taken out after the graphite lightning protection downlead test product of carbon fiber-containing is then placed in 100 DEG C of insulating box 0.5h, will be tried
Product, which are placed in air after cooled to room temperature, measures D.C. resistance and resistance change rate.Test result such as following table.
The compound down conductor high temperature tolerance test result of 1.1 carbon fiber and graphite of table
(2) low temperature tolerant is tested
Using the resistance of QJ44 direct-flow double bridge measurement test product before test, every section is calculated using resistivity calculation formula
Then test product is placed in -40 DEG C of insulating box and takes out after 0.5h, test product is placed in air and is heated up naturally by the resistivity of test product
D.C. resistance and resistance change rate are measured afterwards.Test result such as following table.
The compound down conductor low temperature tolerant test result of 1.2 carbon fiber-containing graphite of table
(3) cripping test
Using the resistance of QJ44 direct-flow double bridge measurement test product before test, every section is calculated using resistivity calculation formula
The resistivity of test product, test method: choosing midpoint respectively to test product is bending point, carries out 10 90 degree of bendings repeatedly, test knot
Shu Hou observes down conductor appearance, and measures test front and back D.C. resistance change rate.Test result such as following table.
The compound down conductor cripping test result of 1.3 carbon fiber-containing graphite of table
(4) wear test
Using the resistance of QJ44 direct-flow double bridge measurement test product before test, every section is calculated using resistivity calculation formula
The resistivity of test product, test method: choosing midpoint respectively to test product is bending point, carries out 10 90 degree of bendings repeatedly, test knot
Shu Hou observes down conductor appearance, and measures test front and back D.C. resistance change rate.Test result such as following table.
The compound down conductor wear test result of 1.4 carbon fiber-containing graphite of table
Two, the compound ground line test result of soft graphite:
(1) high temperature tolerance is tested
The compound earthing material high temperature tolerance test result of 2.1 soft graphite of table
(2) low temperature tolerant is tested
The compound earthing material low temperature tolerant test result of 2.2 soft graphite of table
(3) wear test
The compound earthing material wear test result of 2.3 soft graphite of table
(4) cripping test
The compound earthing material cripping test result of 2.4 soft graphite of table
The comparison of test results of 2.5 two kinds of materials of table
Comparative test conclusion: the data in table 2.5 are every kind of test specimen under 4 kinds of experimental conditions, are tested three times
Front and back resistance measurement, then it is computed resulting average resistance change rate.It can intuitively see that carbon fiber is made by test data
For a kind of novel fibrous material, there is excellent characteristics not available for other materials.Under the high temperature conditions, carbon fiber-containing layer
The compound down conductor change in resistance of soft graphite is averagely only 1.7%, and under cryogenic conditions, change in resistance is only 1.3%,
Significantly lower than the compound down conductor of soft graphite, this has absolutely proved the characteristic of the more excellent high temperature resistant low temperature of carbon fiber,
More stable state can be kept in the variability of environment temperature.In cripping test and wear test, due to carbon fiber
Surface smoother, braiding layer are woven by carbon fiber wire, protect the compound earthing material of internal graphite because bending and grinding
Graphite falls off caused by damage, avoids the exposure of internal toughened fiber, ensure that the operation that downlead can be steady in a long-term, and
And change in resistance is bending and is being respectively less than the compound down conductor of soft graphite under abrasion condition, resistivity becomes in the case of bending
Change in resistance is averagely only 0.16% under the conditions of changing averagely only 0.4%, wear test.Therefore flexible using carbon fiber-containing layer
Graphite down conductor avoids the compound down conductor surface layer graphite of soft graphite and is exposed to asking of being easy to fall off outside for a long time
Topic, so that service life is longer than soft graphite；Under the conditions of complicated landform and rugged environment, carbon fiber-containing layer is flexible
The compound down conductor resistance change rate of graphite is lower, more stability.
As shown in figure 3, in down conductor installation, the compound down conductor 7 of carbon fiber-containing layer soft graphite and flexibility
The compound ground line 10 of graphite is linked in junction using compound self-lock connector 8, is finally backfilling and compacted soil 9.
Basic principles and main features and advantages of the present invention of the invention have been shown and described above.The skill of the industry
Art personnel it should be appreciated that the present invention is not limited to the above embodiments, the above embodiments and description only describe
The principle of the present invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these
Changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and
Its equivalent thereof.
Claims (8)
1. a kind of compound down conductor of carbon fiber-containing layer soft graphite, it is characterised in that: the down conductor is from outside to inside
Successively it is made of carbon fiber braiding layer, soft graphite braiding layer, soft graphite harness.
2. the compound down conductor of carbon fiber-containing layer soft graphite according to claim 1, it is characterised in that: the carbon fiber
Tie up braiding layer with a thickness of 2-4mm.
3. the compound down conductor of carbon fiber-containing layer soft graphite according to claim 1, it is characterised in that: the flexibility
The thickness of graphite line braiding layer is degree 2-4mm.
4. the compound down conductor of carbon fiber-containing layer soft graphite according to claim 1, it is characterised in that: the flexibility
The radius of graphite harness is 6-10mm.
5. the compound down conductor of carbon fiber-containing layer soft graphite according to claim 1, it is characterised in that: carbon fiber is compiled
Tissue layer is that carbon fiber bundle is wound in by more carbon fiber wires, and carbon fiber bundle weaves by double track or more rails are knitted to form carbon fiber
Braiding layer.
6. the compound down conductor of carbon fiber-containing layer soft graphite according to claim 1, it is characterised in that: the flexibility
Graphite braiding layer is will to form graphite worm by oxidation processes and high temperature puffing, forms work by roll-in, thermoplastic and twisted wire
Skill is prepared into soft graphite beam, and graphite beam is knitted to form soft graphite braiding layer by double track or more rails.
7. the compound down conductor of carbon fiber-containing layer soft graphite according to claim 1, it is characterised in that: the flexibility
Graphite harness is that more graphite Shu Buxu are wound, other more graphite beams surround center directly centered on single graphite beam
Graphite beam arranges graphite beam layer.
8. the compound down conductor of carbon fiber-containing layer soft graphite according to claim 7, it is characterised in that: the graphite
Beam adds glass fibre as toughened fiber during roll-in forms Graphite cloth, is bonded using water-borne pressure sensitive adhesive, then
Make glass fibre in every graphite beam by twisted wire moulding process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810725921.2A CN109036663A (en) | 2018-07-04 | 2018-07-04 | The compound down conductor of carbon fiber-containing layer soft graphite |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810725921.2A CN109036663A (en) | 2018-07-04 | 2018-07-04 | The compound down conductor of carbon fiber-containing layer soft graphite |
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| Publication Number | Publication Date |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111509421A (en) * | 2020-06-15 | 2020-08-07 | 广东电网有限责任公司电力科学研究院 | Graphite carbon fiber flexible grounding wire |
| CN112563844A (en) * | 2020-12-03 | 2021-03-26 | 中国电力科学研究院有限公司 | Flexible graphite/continuous carbon fiber composite conductive grounding material and preparation method thereof |
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| CN112563844B (en) * | 2020-12-03 | 2022-03-04 | 中国电力科学研究院有限公司 | Flexible graphite/continuous carbon fiber composite conductive grounding material and preparation method thereof |
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