CN103500595A - Composite graphite grounding material with low skin effect and preparation method for composite graphite grounding material - Google Patents
Composite graphite grounding material with low skin effect and preparation method for composite graphite grounding material Download PDFInfo
- Publication number
- CN103500595A CN103500595A CN201310501286.7A CN201310501286A CN103500595A CN 103500595 A CN103500595 A CN 103500595A CN 201310501286 A CN201310501286 A CN 201310501286A CN 103500595 A CN103500595 A CN 103500595A
- Authority
- CN
- China
- Prior art keywords
- composite stone
- graphite
- composite
- ink marker
- line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Laminated Bodies (AREA)
Abstract
The invention discloses a composite graphite grounding material with a low skin effect and a preparation method for the composite graphite grounding material. The composite graphite grounding material is shaped into a rope or a stranded wire, and comprises a flexible inner core, a second outer composite graphite yarn layer and an outermost composite graphite yarn braided layer, wherein the flexible inner core is wrapped by the second outer composite graphite yarn layer; the second outer composite graphite yarn layer is wrapped by the outermost composite graphite yarn braided layer. The composite graphite grounding material has the advantages of high corrosion resistance, high electrical conductivity, high flexibility, low skin effect, low cost, easiness for transportation, high precision of bonding with soil and the like; the composite graphite grounding material is low in cost, so that the composite graphite grounding material can be prevented from being artificially stolen and damaged, and is applied to all engineering fields of transformer substations, overhead power transmission line towers, high-rise buildings and the like with electrical grounding requirements.
Description
?
Technical field
The present invention relates to electric power system Lightning protection field, relate in particular to compound earthing material of a kind of low kelvin effect graphite and preparation method thereof.
Background technology
System is the critical facility that guarantees the power equipment safety reliability service power ground.The earth electrode of existing power equipment mainly has the following disadvantages: (1) seriously corroded.The common metal earth electrode is estimated 20 years useful life, the even i.e. seriously corrosion in 3～5 years had.(2) cost is high.Anticorrosion ability is copper metal price costliness preferably, domestic less employing.(3) not high with the soil bonding tightness.The metal earth electrode is due to the hard fragility characteristics of itself, is combined defective tightness in laid processes with soil, and contact resistance forms greatly and easily the electrochemical corrosion of oxygen concentration difference.(4) inconvenience transportation and construction.Metal earthing material Heavy Weight, the large inconvenience transportation of volume and construction.(5) metal material subjects to theft destruction.The metal material secondary is peddled and is worth highly, and ground lead, ground connection box, earth electrode etc. suffer artificial theft repeatly, destroy.
Graphite material electric conductivity excellence, have good plasticity and stability, is again good resistant material simultaneously, in China, abundant reserves arranged.Graphite electrode is widely used at industrial circles such as smelting, batteries.In electric power system earth electrode field, rectangle and cylindrical graphite grounding module have become a kind of grounding reconstruction material.The Chinese patent of notification number CN1042077C " thunder-preventing graphite grounding device and making thereof and construction method ", the Chinese patent of notification number CN201478468U " anti-corrosion grounding module ", the Chinese patent of publication No. CN102496790A " a kind of graphite grounding module ", the Chinese patent of publication number CN1110013A " anti-thunderstrock grounding device of composite carbon material and manufacture method thereof ", the Chinese patent of notification number CN1047881C " manufacture method of low resistance earthing module material ", the Chinese patent of notification number CN2454912Y " metal-graphite carthing body ", the Chinese patent of notification number CN1194930C " grounding conductive concrete ", the Chinese patent of notification number CN2845202Y " ground mould with physical resistance reducing agent ", the Chinese patent of notification number CN2733631Y " integrated connection formula expandable graphite nonmetal grounding device ", the Chinese patent of notification number CN101030458B " non-corrosive assembled grounding electrode and resistance-lowering material and production method thereof " etc. has been put down in writing square or cylindrical graphite has been connected with metal, imbed and undergroundly can realize corrosion resistant ground connection.
Graphite also has application in electric power system ground connection as the resistance reducing agent material.The Chinese patent " a kind of resistance reducing agent " of the Chinese patent of the Chinese patent of notification number CN101752021B " long-effective corrosion-prevention physical resistance-reducing agent ", notification number CN100498978C " long service life, corrosion-proof, and electric resistance reducing agent for earthing (modified model) ", notification number CN100490020C, the Chinese patent " solid grounded resistance reducing agent and preparation method thereof " of notification number CN1249730C etc. have been put down in writing the graphite resistance reducing agent for grounding reconstruction.
Above-mentioned graphite grounding module is due to problems such as production cost is high, fragility easy fracture, installation inconvenience, and actual the popularization faces some difficulties.Above-mentioned graphite resistance reducing agent still is subject to certain limitation because its poor stability, resistance reducing effect shortcoming limited, that easily cause the aspects such as metal earth electrode burn into contaminated soil make its application.
Summary of the invention
The problem existed for existing electric power system lightning-proof grounding body, the invention provides a kind of corrosion-resistant, conductivity is good, pliability good, the cheap compound earthing material of low kelvin effect graphite and preparation method thereof.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
One, the low compound earthing material of kelvin effect graphite, its outward appearance
For rope form or twisted wire shape, comprise the inferior outer composite stone line of ink marker layer of flexible inner core, flexible inner core outside parcel and the outermost layer composite stone line of ink marker braid of inferior outer composite stone line of ink marker layer outside parcel, wherein:
Inferior outer composite stone line of ink marker layer consists of the first composite stone line of ink marker along flexible inner core outside longitudinal arrangement, the first composite stone line of ink marker is obtained by the first composite stone ink ribbon twisting, and described the first composite stone ink ribbon comprises upper and lower worm graphite linings and the fibrous skeleton between upper and lower worm graphite linings;
Outermost layer composite stone line of ink marker braid is obtained by the second composite stone line of ink marker braiding, the second composite stone line of ink marker is obtained by the second composite stone ink ribbon twisting, and described the second composite stone ink ribbon comprises upper and lower worm graphite linings and the fibrous skeleton between upper and lower worm graphite linings.
The fibrous skeleton between upper and lower worm graphite linings of the first composite stone ink ribbon and the second composite stone ink ribbon mainly plays " skeleton " supporting role, and described fibrous skeleton between upper and lower worm graphite linings is one or more in organic fiber, inorfil and metallic fiber.The fibrous skeleton between upper and lower worm graphite linings of the first composite stone ink ribbon and the second composite stone ink ribbon can be identical or different.
For strengthening the conductivity of time outer composite stone line of ink marker layer, a kind of preferred version is: the fibrous skeleton between upper and lower worm graphite linings of the first composite stone ink ribbon at least comprises conductive fiber, described conductive fiber is one or more in metallic fiber, alloy fiber and conductive carbon fibre, and the ratio that conductive fiber accounts for fibrous skeleton is not restricted.
For strengthening the mechanical property of outermost layer composite stone line of ink marker braid, a kind of preferred version is: the fibrous skeleton between upper and lower worm graphite linings of the second composite stone ink ribbon at least comprises toughened fiber, described toughened fiber is preferably one or more in Kafra fiber, carbon fiber and nickel fiber, and the ratio that toughened fiber accounts for fibrous skeleton is not restricted.
The fibrous skeleton outer surface between upper and lower worm graphite linings of above-mentioned the first composite stone ink ribbon and the second composite stone ink ribbon is coated with adhesive phase.
Two, the preparation method of the low compound earthing material of kelvin effect graphite comprises step:
Step 1, worm graphite is carried out to roll-in and make the worm graphite paper, the fibrous skeleton of arranging between two-layer worm graphite paper obtains the first composite graphite paper and the second composite graphite paper, the fibrous skeleton that the first composite graphite paper is drawn together with the second composite graphite paper bag is identical or not identical, the first composite graphite paper and the second composite graphite paper are carried out to roll-in, vertically cut the first composite graphite paper and the second composite graphite paper along fibrous skeleton and obtain the first composite stone ink ribbon and the second composite stone ink ribbon;
Step 2, carry out the twisting acquisition sub-thread first composite stone line of ink marker and the sub-thread second composite stone line of ink marker to the first composite stone ink ribbon and the second composite graphite band respectively;
Step 3, adopt braiding machine that the sub-thread first composite stone line of ink marker vertically is wrapped in to the flexible inner core outside and obtain the outer composite stone line of ink marker of at least one level layer, simultaneously, the sub-thread second composite stone line of ink marker is knitted to time outer composite stone line of ink marker layer outside and obtains at least one deck outermost layer composite stone line of ink marker braid.
Above-mentioned worm graphite can adopt following method to obtain:
Crystalline flake graphite is carried out to acidifying and oxidation successively and obtain expansible graphite, expansible graphite expanded 5 ~ 6s at 850 ~ 950 ℃ of temperature is obtained to worm graphite.
The fibrous skeleton of arranging between two-layer worm graphite paper described in step 1 obtains the first composite graphite paper and the second composite graphite paper, and described fibrous skeleton is the fibrous skeleton that soaked adhesive.
In step 3, adopt single track braiding, double track braiding or many rails weaving manner that the sub-thread second composite stone line of ink marker is knitted to time outer composite stone line of ink marker layer outside and obtain outermost layer composite stone line of ink marker braid.
In step 3, adopt cover volume mode that the sub-thread second composite stone line of ink marker is knitted to time outer composite stone line of ink marker layer outside and obtain multilayer outermost layer composite stone line of ink marker braid.
In step 3, adopt circular winding displacement plate to carry out assisting knitting, offer flexible inner core entrance hole on described circular winding displacement plate, offer at least one deck the first composite stone line of ink marker entrance hole around flexible inner core entrance hole; Before braiding, flexible inner core is passed from the flexible inner core entrance hole of winding displacement plate, the sub-thread first composite stone line of ink marker is passed from the first composite stone line of ink marker entrance hole of winding displacement plate.
In the present invention, flexible inner core can enlarge the diameter of earthing material, increases the contact area of earthing material and soil.At first, can obviously reduce the earth resistance of ground network, improve the lightning withstand level of power equipment, reduce step voltage and touch voltage, maintenance operation personnel's personal safety; Secondly, flexible inner core can obviously reduce the kelvin effect in ground network high-frequency current diffusing process, adopts nonmetal flexible inner core Substitute For Partial graphite line cheap, wide material sources, and significantly saving resource, reduce manufacturing cost; Again, the characteristics that graphite line is flexible relatively, tensile strength is general, adopt larger, the flexible polymer flexibility inner core of hardness, and when the outermost composite stone line of ink marker braid of braiding, sub-thread graphite litzendraht wire can load more tension load; Finally, flexible inner core selection tensile strength is better than the material of graphite line, significantly improves the mechanical property of earthing material, makes earthing material of the present invention can be applicable in the earth work in the zones such as frozen soil layer, rock.
Inferior outer field composite stone line of ink marker layer, along flexible inner core outside longitudinal arrangement, mainly plays electric action.Its current lead-through path is shorter, and the compactness between graphite line is higher.Form the first composite stone line of ink marker of time outer composite stone line of ink marker layer, alternative compound one or more conductive fibers are strengthened the electric conductivity of the first composite stone line of ink marker.
Outermost composite stone line of ink marker braid mainly plays global formation and electric action.Form the second composite stone line of ink marker of outermost layer composite stone line of ink marker braid, alternative compound one or more toughened fibers are strengthened the mechanical property of the composite stone line of ink marker, to improve the mechanical strength of earthing material integral body.Adopt different weaving manners to improve the compactness of outer field composite stone line of ink marker braid; While carrying out multilayer cover volume, each braid adopts graphite line quantity to increase progressively successively from inside to outside, and its manufacturing cost is fully controlled.
Compared to the prior art, the present invention has following characteristics:
1, the compound earthing material of graphite of the present invention has good corrosion-resistant, conductivity, flexible, low kelvin effect, cheap, easy transportation, the accurate advantages of higher of being combined with soil; Due to cheap, also can avoid artificial theft to destroy.
2, preparation technology of the present invention is simple, cost of material is cheap, energy-conserving and environment-protective, laying simple and flexible, is applicable to producing in enormous quantities and application.
3, the present invention is for electric power system Lightning protection field provides a practicable approach, and all need the engineering field of electrical grounding to be applicable to transformer station, overhead power transmission line pole tower, elevation building etc.
The accompanying drawing explanation
Fig. 1 is composite graphite paper schematic diagram;
Fig. 2 is the winding displacement plate schematic diagram;
Fig. 3 is a kind of concrete enforcement structural representation of the compound earthing material of graphite;
Fig. 4 is that the compound earthing material of graphite is used schematic diagram.
Wherein, 1-upper strata worm graphite paper; The 2-fibrous skeleton; 3-lower floor worm graphite paper; The 4-winding displacement plate; The flexible inner core entrance hole of 5-; 6-the first composite stone line of ink marker incoming line; 7-composite stone line of ink marker braid; 8-composite stone line of ink marker layer; The flexible inner core of 9-; 10-gold utensil joint; The compound earthing material of 11-graphite; The 12-air layer, the 13-ground level; 14-soil.
Embodiment
The invention provides the compound earthing material of a kind of low kelvin effect graphite, the compound earthing material of this graphite comprises three-decker, sees Fig. 3, and internal layer is flexible inner core (9), the composite stone line of ink marker layer (8) that inferior skin is at least one deck, the composite stone line of ink marker braid (7) that outermost layer is at least one deck.
Describe the preparation method of the compound earthing material of graphite of the present invention in detail below in conjunction with embodiment and accompanying drawing, but protection range is not limited to the method.
1, preparation worm graphite.
Worm graphite can directly be bought, and also can prepare voluntarily.This concrete enforcement be take crystalline flake graphite as raw material, prepares voluntarily worm graphite, is specially:
(1) prepare expansible graphite:
Adopt sulfuric acid or nitric acid acidifying crystalline flake graphite, the employing strong oxidizer (as, KMnO
4, KClO
4or H
2o
2) the oxidation crystalline flake graphite, can obtain expansible graphite;
(2) prepare worm graphite:
By expansible graphite expanded 5 ~ 6s at 850 ~ 950 ℃ of temperature, obtain worm graphite.
2, prepare the first composite stone ink ribbon and the second composite stone ink ribbon.
(1) adopt rolling equipment that worm graphite is pressed into to the worm graphite paper, the fibrous skeleton (2) that soaked adhesive of arranging between two-layer worm graphite paper (1,3) obtains composite graphite paper, sees Fig. 1.
It is upper that fibrous skeleton (2) uniform spreading that one or more were soaked to adhesive is located at lower floor's worm graphite paper (3), carries out the thermosetting of 10 ~ 40s and process at 110 ~ 300 ℃ of temperature, afterwards, lays upper strata worm graphite paper (1); Adopt rolling equipment to make composite graphite paper through at least twice roll-in.The composite graphite paper bag is drawn together the first composite graphite paper and the second composite graphite paper, and the fibrous skeleton of laying in the first composite graphite paper and the second composite graphite paper can be the same or different.
As a kind of preferred version, at least comprise conductive fiber between the two-layer worm graphite paper of the first composite graphite paper, conductive fiber can be one or more in metallic fiber, alloy fiber and conductive carbon fibre.At least comprise the mechanics fortifying fibre between the two-layer worm graphite paper of the second composite graphite paper.
Above-mentioned adhesive can be thermosetting polymer glue or conducting resinl, wherein, thermosetting polymer glue can-formaldehyde resin adhesive stupid for acrylic size, polyurethane/PU glue, amino resin adhesive, phenolic resin glue, epoxide-resin glue, furane resins glue, resorcin-formaldehyde resin adhesive, diformazan, unsaturated polyester ester gum, composite resin glue, polyimides glue or urea-formaldehyde resin adhesive etc.; Conducting resinl can be cupric powder conductive adhesive, nickel powder conducting resinl, plating macromolecular compound conducting resinl, carbon black conducting resin, chopped carbon fiber conducting resinl or graphite conductive adhesive.
Above-mentioned fibrous skeleton can be organic fiber (for example: polyester fiber/terylene, Fypro/polyamide fibre or nylon, vinal/polyvinyl, polyacrylonitrile fibre/acrylic fibers, polypropylene fibre/polypropylene fibre or polyvinyl chloride fibre/polyvinyl chloride fibre), inorfil (for example: glass fibre, carbon fiber, boron fibre, kevlar fiber or ceramic fibre) or metallic fiber (for example: copper wire, nickel wire or stainless steel wire).Being laid in fibrous skeleton between two-layer worm graphite paper can be thread, wire or band shape.
(2) cut the first composite graphite paper and the second composite graphite paper and obtain the first composite stone ink ribbon and the second composite stone ink ribbon.
Vertically cut respectively the first composite graphite paper and the second composite graphite paper obtains the first composite stone ink ribbon and the second composite stone ink ribbon along fiber.
Because outermost layer composite stone line of ink marker braid is high to mechanical property requirements, so can be chosen in the second composite stone ink ribbon, add toughened fiber to strengthen its mechanical property.Inferior outer composite stone line of ink marker layer, owing to focusing on electric conductivity, adds conductive fiber to strengthen conductivity so can be chosen in the first composite stone ink ribbon.
As a kind of preferred version, the first composite stone ink ribbon comprises 1 ~ 3 metallic fiber and/or alloy fiber, or comprises 1 ~ 2 conductive carbon fibre.The conductive carbon fibre conductivity adopted should be greater than 1 * 10
-3Ω cm.The second composite stone ink ribbon comprises 1 ~ 3 toughened fiber, and this toughened fiber is preferably Kafra fiber, can select 200D, 400D, 600D, 800D or 1000D model Kafra fiber.
3, respectively the first composite stone ink ribbon and the second composite graphite band are carried out to the twisting acquisition sub-thread first composite stone line of ink marker and the sub-thread second composite stone line of ink marker.
Adopt twisting machine to carry out unidirectional twist system to the composite graphite band and obtain the sub-thread graphite line, gained sub-thread graphite line diameter 2 ~ 4mm, the twisting machine rotating speed is preferably 60 ~ 80r/m.
4, adopt braiding machine at flexible inner core outside braiding time outer composite stone line of ink marker layer and outermost layer composite stone line of ink marker braid.
This step adopts circular winding displacement plate to assist establishment, structure is shown in Fig. 2, offer flexible inner core entrance hole (5) on winding displacement plate, some the first composite stone line of ink marker entrance holes (6) are opened in take on the circumference that flexible inner core entrance hole (5) is the center of circle, and in Fig. 2, flexible inner core entrance hole (5) offers 2 layer of first composite stone line of ink marker entrance hole (6) on every side.
During braiding, at first, flexible inner core is passed from the flexible inner core entrance hole (5) of winding displacement plate, the sub-thread first composite stone line of ink marker is passed from the first composite stone line of ink marker entrance hole (6) of winding displacement plate, if need to, at flexible inner core outside parcel one deck composite stone line of ink marker layer, only the sub-thread first composite stone line of ink marker be passed to certain layer first composite stone line of ink marker entrance hole (6) of winding displacement plate; If need to, at flexible inner core outside wrapped multiple composite stone line of ink marker layer, select multilayer the first composite stone line of ink marker entrance hole (6) through winding displacement plate by the sub-thread first composite stone line of ink marker.Then, adopt braiding machine, the sub-thread first composite stone line of ink marker vertically is wrapped in to the flexible inner core outside and obtains at least one deck composite graphite line layer, simultaneously, the sub-thread second composite stone line of ink marker is knitted to the composite stone line of ink marker layer outside and obtains at least one deck composite graphite line braid.The weaving manner of composite stone line of ink marker braid can adopt single track braiding, double track braiding or many rails weaving manner; Also can adopt cover volume mode to weave MULTILAYER COMPOSITE graphite line braid.
In the braiding process, should evenly be arranged in flexible inner core surrounding for the first composite stone line of ink marker of inferior outer composite stone line of ink marker layer, and envelope flexible inner core as far as possible fully; Sub-thread the second composite graphite line tension requirement for outermost layer composite stone line of ink marker braid is 5 ~ 60N, and has good compactness and electrically contact between the sub-thread second composite stone line of ink marker; Material braiding speed is 200 ~ 750mm/min.
In this step, flexible inner core requires to have flexible, have certain support strength, moisture-resistant, resistant to thermal aging and resist chemical, and it specifically can be Sythetic fiber rope/bundle, inorfil rope/bundle, rubber tube, rubber strip bundle, foamed plastic rope/bundle, bipeltate rope/bundle, plastic coir rope or the plastic rope made of hemp.If be not limited to the cost restriction, flexible inner core also can adopt steel wire rope or steel tendon.Described synthetic fibers are preferably nylon, polypropylene fibre, terylene, aramid fiber, polyethylene, polypropylene or synthetic plastic; Described inorfil is preferably glass fibre or ceramic fibre; Described rubber is preferably general purpose rubber, silicon rubber, butadiene-styrene rubber, butadiene rubber, isoprene rubber or ethylene-propylene rubber.
The above-mentioned concrete enforcement provided is provided flexible inner core, and the material that has pliability, support strength, moisture-resistant, resistant to thermal aging and resist chemical in every case all can be used as flexible inner core of the present invention.
5, reprocessing.
Adopt the connector lug and the graphite that produce in the compound earthing material braiding of trimmer finishing graphite process to come off, damage for preventing the compound earthing material of graphite, shaping diameter compression ratio should be controlled at more than 85%.
According to the engineering design demand, choose the compound earthing material of graphite and the gold utensil joint of preseting length, adopt buckle machine by the graphite material crimping of gold utensil joint and certain-length, see Fig. 4, the gold utensil joint should have stronger corrosion resistance, specifically can select to adopt anticorrosive paint or conducting resinl etc. to carry out antiseptic gold utensil joint.To guarantee to contact between the compound earthing material of graphite and gold utensil joint closely and be connected firmly.
Below will be by embodiment, and by reference to the accompanying drawings, further illustrate the present invention.
Embodiment 1
The present embodiment, the rubber tube that flexible inner core is external diameter 20mm, internal diameter 12mm.Adopt 48 first composite stone lines of ink marker evenly to be arranged in flexible inner core surrounding, between the upper and lower worm graphite linings of the first composite stone ink ribbon of the twisting first composite stone line of ink marker, be laid with glass fibre.Adopt 24 second composite stone lines of ink marker to obtain the compound earthing material of graphite of diameter 33mm through the double track interlacing.Be laid with the Kafra fiber of 12 glass fibres and 1 600D model between the upper and lower worm graphite linings of the second composite stone ink ribbon of the twisting second composite stone line of ink marker; Gained sub-thread the second graphite recombination line graphite line tension force 15N.
Embodiment 2
In the present embodiment, the nylon rope that flexible inner core is diameter 20mm.Adopt 48 first composite stone lines of ink marker evenly to be arranged in flexible inner core surrounding, be laid with 12 glass fibres and 1 nickel fiber between the upper and lower worm graphite linings of the first composite stone ink ribbon of the twisting first composite stone line of ink marker.Adopt 24 second composite stone lines of ink marker through the double track interlacing, obtain the compound earthing material of graphite of diameter 33mm.Be laid with the Kafra fiber of 12 glass fibres and 1 600D model between the upper and lower worm graphite linings of the second composite stone ink ribbon of the twisting second composite stone line of ink marker; Gained sub-thread the second graphite recombination line graphite line tension force 15N.
Embodiment 3
In the present embodiment, the polyethylene that flexible inner core is diameter 25mm/PE plastic ties.Adopt 56 the first composite stone line of ink marker plates evenly to be arranged in flexible inner core surrounding, be laid with 12 glass fibres and 1 nickel fiber between the upper and lower worm graphite linings of the first composite stone ink ribbon of the twisting first composite stone line of ink marker.Adopt 24 second composite stone lines of ink marker through the double track interlacing, obtain the compound earthing material of graphite of diameter 40mm.Be laid with the Kafra fiber of 12 glass fibres and 1 600D model between the upper and lower worm graphite linings of the second composite stone ink ribbon of the twisting second composite stone line of ink marker; Gained sub-thread the second composite stone line of ink marker graphite line tension force 15N.
Embodiment 4
In the present embodiment, the polypropylene that flexible inner core is diameter 25mm/PP plastic ties.Adopt 56 first composite stone lines of ink marker evenly to be arranged in flexible inner core surrounding, be laid with 11 glass fibres and 2 copper fibers between the upper and lower worm graphite linings of the first composite stone ink ribbon of the twisting first composite stone line of ink marker.Adopt 24 second composite stone lines of ink marker through the double track interlacing, obtain the compound earthing material of graphite of diameter 40mm.Be laid with the Kafra fiber of 12 glass fibres and 1 600D model between the upper and lower worm graphite linings of the second composite stone ink ribbon of the twisting second composite stone line of ink marker; Gained sub-thread the second composite stone line of ink marker graphite line tension force 15N.
By digging in-situ ground connection ditch and bury the compound earthing material of graphite of embodiment 1 ~ 4 underground, simulate actual transmission line tower grounding network, in soil resistivity 55 Ω m areas, small-sized tower grounding net is set, ground network is 3 meters of 3 * 3m square and 45 ° of direction extensions of 4 corner levels, the about 0.6m of the whole depth of burying, the power frequency earthing resistance value approximately 1.87 Ω (along with the prolongation of the depth of burying and earth mat perimetric length, grounding resistance can further reduce), reach soil resistivity in power industry " overvoltage protection and the insulation coordination of DL/T 620-1997 alternating-current electric device " and be less than the standard-required that 100 Ω m area pole tower ground resistances are less than 10 Ω.
The compound earthing material resistivity of the graphite that embodiment 1 ~ 4 makes all is less than 2.1 * 10
-5Ω m; By " GB/T 21698-2008 bonded earth electrode technical conditions ", the compound earthing material of embodiment 1 ~ 4 graphite is carried out to the impulse current resistance test, during test more than impulse current amplitude 200kA, the structure of graphite material and outward appearance are all unchanged, resistivity is floated in 2%, is applicable to power system transmission line tower grounding engineering and other ground connection occasions.
The compound earthing material of graphite of the present invention has good conductivity, corrosion resistance, flexible, low kelvin effect, high with the conjugation of soil, convenient transportation and site operation, the advantages such as safe antitheft, be applicable to the occasion that transformer station, electric power line pole tower and building etc. need electrical grounding.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination disclosed in this manual, and the arbitrary new method disclosed or step or any new combination of process.
Claims (10)
1. hang down the compound earthing material of kelvin effect graphite, it is characterized in that:
For rope form or twisted wire shape, comprise the inferior outer composite stone line of ink marker layer of flexible inner core, flexible inner core outside parcel and the outermost layer composite stone line of ink marker braid of inferior outer composite stone line of ink marker layer outside parcel, wherein:
Inferior outer composite stone line of ink marker layer consists of the first composite stone line of ink marker along flexible inner core outside longitudinal arrangement, the first composite stone line of ink marker is obtained by the first composite stone ink ribbon twisting, and described the first composite stone ink ribbon comprises upper and lower worm graphite linings and the fibrous skeleton between upper and lower worm graphite linings;
Outermost layer composite stone line of ink marker braid is obtained by the second composite stone line of ink marker braiding, the second composite stone line of ink marker is obtained by the second composite stone ink ribbon twisting, and described the second composite stone ink ribbon comprises upper and lower worm graphite linings and the fibrous skeleton between upper and lower worm graphite linings.
2. the compound earthing material of low kelvin effect graphite as claimed in claim 1 is characterized in that:
The fibrous skeleton between upper and lower worm graphite linings of described the first composite stone ink ribbon and the second composite stone ink ribbon is one or more in organic fiber, inorfil and metallic fiber.
3. the compound earthing material of low kelvin effect graphite as claimed in claim 1 is characterized in that:
The fibrous skeleton between upper and lower worm graphite linings of described the first composite stone ink ribbon at least comprises conductive fiber.
4. the compound earthing material of low kelvin effect graphite as claimed in claim 1 is characterized in that:
The fibrous skeleton between upper and lower worm graphite linings of described the second composite stone ink ribbon at least comprises toughened fiber.
5. the compound earthing material of low kelvin effect graphite as claimed in claim 1 is characterized in that:
The fibrous skeleton outer surface between upper and lower worm graphite linings of described the first composite stone ink ribbon and the second composite stone ink ribbon is coated with adhesive phase.
6. the preparation method of the low compound earthing material of kelvin effect graphite, is characterized in that, comprises step:
Step 1, worm graphite is carried out to roll-in and make the worm graphite paper, the fibrous skeleton of arranging between two-layer worm graphite paper obtains the first composite graphite paper and the second composite graphite paper, the fibrous skeleton that the first composite graphite paper is drawn together with the second composite graphite paper bag is identical or not identical, the first composite graphite paper and the second composite graphite paper are carried out to roll-in, vertically cut the first composite graphite paper and the second composite graphite paper along fibrous skeleton and obtain the first composite stone ink ribbon and the second composite stone ink ribbon;
Step 2, carry out the twisting acquisition sub-thread first composite stone line of ink marker and the sub-thread second composite stone line of ink marker to the first composite stone ink ribbon and the second composite graphite band respectively;
Step 3, adopt braiding machine that the sub-thread first composite stone line of ink marker vertically is wrapped in to the flexible inner core outside and obtain the outer composite stone line of ink marker of at least one level layer, simultaneously, the sub-thread second composite stone line of ink marker is knitted to time outer composite stone line of ink marker layer outside and obtains at least one deck outermost layer composite stone line of ink marker braid.
7. the preparation method of the compound earthing material of low kelvin effect graphite as claimed in claim 6 is characterized in that:
The fibrous skeleton of arranging between two-layer worm graphite paper described in step 1 obtains the first composite graphite paper and the second composite graphite paper, and described fibrous skeleton is the fibrous skeleton that soaked adhesive.
8. the preparation method of the compound earthing material of low kelvin effect graphite as claimed in claim 6 is characterized in that:
In step 3, adopt single track braiding, double track braiding or many rails weaving manner that the sub-thread second composite stone line of ink marker is knitted to time outer composite stone line of ink marker layer outside and obtain outermost layer composite stone line of ink marker braid.
9. the preparation method of the compound earthing material of low kelvin effect graphite as claimed in claim 6 is characterized in that:
In step 3, adopt cover volume mode that the sub-thread second composite stone line of ink marker is knitted to time outer composite stone line of ink marker layer outside and obtain multilayer outermost layer composite stone line of ink marker braid.
10. the preparation method of the compound earthing material of low kelvin effect graphite as claimed in claim 6 is characterized in that:
In step 3, adopt circular winding displacement plate to carry out assisting knitting, offer flexible inner core entrance hole on described circular winding displacement plate, offer at least one deck the first composite stone line of ink marker entrance hole around flexible inner core entrance hole; Before braiding, flexible inner core is passed from the flexible inner core entrance hole of winding displacement plate, the sub-thread first composite stone line of ink marker is passed from the first composite stone line of ink marker entrance hole of winding displacement plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310501286.7A CN103500595B (en) | 2013-10-23 | 2013-10-23 | Low kelvin effect graphite compound earthing material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310501286.7A CN103500595B (en) | 2013-10-23 | 2013-10-23 | Low kelvin effect graphite compound earthing material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103500595A true CN103500595A (en) | 2014-01-08 |
| CN103500595B CN103500595B (en) | 2015-11-04 |
Family
ID=49865797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310501286.7A Active CN103500595B (en) | 2013-10-23 | 2013-10-23 | Low kelvin effect graphite compound earthing material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103500595B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269203A (en) * | 2014-10-27 | 2015-01-07 | 武汉大学 | Metal fiber core low-resistance graphite yarn and preparation method thereof |
| CN104269206A (en) * | 2014-10-27 | 2015-01-07 | 武汉大学 | Low-specific resistance graphite thread and preparation method thereof |
| CN104269664A (en) * | 2014-10-27 | 2015-01-07 | 武汉大学 | Low-temperature-rise composite grounding body and preparation method thereof |
| CN105514629A (en) * | 2016-01-28 | 2016-04-20 | 国家电网公司 | Compound ground electrode |
| CN105826705A (en) * | 2016-05-18 | 2016-08-03 | 山东华安铁塔有限公司 | Anti-corrosion high-carbon flexible grounding body and preparation method |
| CN106229703A (en) * | 2016-08-22 | 2016-12-14 | 国家电网公司 | Graphite bonded earth electrode and the preparation method of impulse earthed resistance can be reduced |
| CN107069249A (en) * | 2016-12-09 | 2017-08-18 | 西峡县金方圆密封材料有限责任公司 | Carbon fiber and graphite flexible ground film and preparation method thereof |
| CN109066262A (en) * | 2018-06-25 | 2018-12-21 | 大连格林艾克创新科技有限公司长垣县分公司研发生产基地 | The preparation method of the modified flexible non-metallic conductive earthing body of graphene |
| CN109411139A (en) * | 2018-10-31 | 2019-03-01 | 湖南湘江电缆有限公司 | A kind of antifatigue long-life wind-powered electricity generation cable of anti-torsion and its manufacturing method |
| CN109888519A (en) * | 2019-03-14 | 2019-06-14 | 四川健坤科技有限公司 | A kind of graphite grounding body and processing technology conducive to conduction |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1805066A (en) * | 2006-01-24 | 2006-07-19 | 袁大铭 | Anti-interference nonmetal cable and its manufacturing method |
| CN202159779U (en) * | 2011-07-11 | 2012-03-07 | *** | Lightning protection grounding electrode body |
| CN102800382A (en) * | 2012-08-24 | 2012-11-28 | 潍坊市宏宇电力设备防护有限公司 | Graphite wire, production process for graphite wire and production equipment for graphite wire |
| CN202695740U (en) * | 2012-07-29 | 2013-01-23 | 保定中良电力科技有限公司 | Lightning protection grounding body |
| CN203205551U (en) * | 2013-04-22 | 2013-09-18 | 潍坊市宏宇电力设备防护有限公司 | Lightning protective grounding body |
| CN203521648U (en) * | 2013-10-23 | 2014-04-02 | 阮江军 | Low skin effect graphite composite grounded material |
-
2013
- 2013-10-23 CN CN201310501286.7A patent/CN103500595B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1805066A (en) * | 2006-01-24 | 2006-07-19 | 袁大铭 | Anti-interference nonmetal cable and its manufacturing method |
| CN202159779U (en) * | 2011-07-11 | 2012-03-07 | *** | Lightning protection grounding electrode body |
| CN202695740U (en) * | 2012-07-29 | 2013-01-23 | 保定中良电力科技有限公司 | Lightning protection grounding body |
| CN102800382A (en) * | 2012-08-24 | 2012-11-28 | 潍坊市宏宇电力设备防护有限公司 | Graphite wire, production process for graphite wire and production equipment for graphite wire |
| CN203205551U (en) * | 2013-04-22 | 2013-09-18 | 潍坊市宏宇电力设备防护有限公司 | Lightning protective grounding body |
| CN203521648U (en) * | 2013-10-23 | 2014-04-02 | 阮江军 | Low skin effect graphite composite grounded material |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269664B (en) * | 2014-10-27 | 2016-06-08 | 武汉大学 | A kind of low temperature rise compound ground connector and its preparation method |
| CN104269206A (en) * | 2014-10-27 | 2015-01-07 | 武汉大学 | Low-specific resistance graphite thread and preparation method thereof |
| CN104269664A (en) * | 2014-10-27 | 2015-01-07 | 武汉大学 | Low-temperature-rise composite grounding body and preparation method thereof |
| CN104269203A (en) * | 2014-10-27 | 2015-01-07 | 武汉大学 | Metal fiber core low-resistance graphite yarn and preparation method thereof |
| CN105514629B (en) * | 2016-01-28 | 2017-10-13 | 国家电网公司 | A kind of compound earthing pole |
| CN105514629A (en) * | 2016-01-28 | 2016-04-20 | 国家电网公司 | Compound ground electrode |
| CN105826705A (en) * | 2016-05-18 | 2016-08-03 | 山东华安铁塔有限公司 | Anti-corrosion high-carbon flexible grounding body and preparation method |
| CN105826705B (en) * | 2016-05-18 | 2018-09-25 | 山东华安铁塔有限公司 | A kind of anticorrosion high-carbon flexible ground body and preparation method |
| CN106229703A (en) * | 2016-08-22 | 2016-12-14 | 国家电网公司 | Graphite bonded earth electrode and the preparation method of impulse earthed resistance can be reduced |
| CN107069249A (en) * | 2016-12-09 | 2017-08-18 | 西峡县金方圆密封材料有限责任公司 | Carbon fiber and graphite flexible ground film and preparation method thereof |
| CN107069249B (en) * | 2016-12-09 | 2020-04-14 | 西峡县金方圆密封材料有限责任公司 | Carbon fiber graphite flexible grounding film and preparation method thereof |
| CN109066262A (en) * | 2018-06-25 | 2018-12-21 | 大连格林艾克创新科技有限公司长垣县分公司研发生产基地 | The preparation method of the modified flexible non-metallic conductive earthing body of graphene |
| CN109066262B (en) * | 2018-06-25 | 2019-12-13 | 大连格林艾克创新科技有限公司长垣县分公司研发生产基地 | preparation method of graphene modified flexible non-metal conductive grounding body |
| CN109411139A (en) * | 2018-10-31 | 2019-03-01 | 湖南湘江电缆有限公司 | A kind of antifatigue long-life wind-powered electricity generation cable of anti-torsion and its manufacturing method |
| CN109411139B (en) * | 2018-10-31 | 2019-10-25 | 湖南湘江电缆有限公司 | A kind of antifatigue long-life wind-powered electricity generation cable of anti-torsion and preparation method thereof |
| CN109888519A (en) * | 2019-03-14 | 2019-06-14 | 四川健坤科技有限公司 | A kind of graphite grounding body and processing technology conducive to conduction |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103500595B (en) | 2015-11-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103500595B (en) | Low kelvin effect graphite compound earthing material and preparation method thereof | |
| CN103490180B (en) | Novel graphite compound earthing material and preparation method thereof | |
| CN203521648U (en) | Low skin effect graphite composite grounded material | |
| CN206673130U (en) | A kind of external force damage prevention soft graphite downlead | |
| CN203521649U (en) | Novel graphite composite grounded material | |
| WO2015058668A1 (en) | Graphite composite grounding material and preparation method thereof | |
| CN202871992U (en) | Carbon fiber grounding electrode | |
| CN205178031U (en) | Flexible ground connection cable | |
| CN201622877U (en) | Electric rubber sleeve flexible cable for salt lake boat | |
| CN202662824U (en) | Anti-lighting complete grounding device for compound grounding body | |
| CN102738602B (en) | Carbon fiber grounding electrode | |
| CN105826705B (en) | A kind of anticorrosion high-carbon flexible ground body and preparation method | |
| CN107069249B (en) | Carbon fiber graphite flexible grounding film and preparation method thereof | |
| CN203932339U (en) | A kind of anticorrosion anti-theft type earth electrode | |
| CN211150126U (en) | Flexible graphite through ground wire | |
| CN203535973U (en) | Non-metallic composite carbon fiber copper-coated grounding material | |
| CN106448842A (en) | Insulating aerial cable made from coreless material | |
| CN211376281U (en) | Special-shaped conductor power cable | |
| CN203351231U (en) | Anticorrosion anti-pulling grounding resistance reducing connecting line | |
| CN203288775U (en) | Novel lightning protection grounding body | |
| CN202332353U (en) | Waterproof rubber jacket flexible cable for deep geothermal heat pump | |
| CN202930570U (en) | Power line corrosion resistance grounding device | |
| CN106785512B (en) | Graphite composite resistance reduction method and device for vertical grounding body of power grounding grid | |
| CN210040590U (en) | Composite graphite grounding wire | |
| CN207691020U (en) | One kind being vertically grounded graphite compound resistance reduction cylinder for electric power grounding grid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: WUHAN UNIVERSITY Free format text: FORMER OWNER: RUAN JIANGJUN Effective date: 20140515 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20140515 Address after: 430072 Hubei Province, Wuhan city Wuchang District of Wuhan University Luojiashan Applicant after: Wuhan University Address before: 430072 Hubei Province, Wuhan city Wuchang District of Hong Kong Wuhan University Luojiashan tea district 108 6 701 Applicant before: Ruan Jiangjun |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170104 Address after: 430000 Hubei city of Wuhan province Wuhan East Lake New Technology Development Zone, Road No. 5-2 National Geospatial Information Industry base two north main unit 10 floor No. 2 Patentee after: WUHAN HONGMEN ELECTRICAL TECHNOLOGY CO., LTD. Address before: 430072 Hubei Province, Wuhan city Wuchang District of Wuhan University Luojiashan Patentee before: Wuhan Univ. |