CN105071062A - Application of graphite grounding connector for stray current protection - Google Patents
Application of graphite grounding connector for stray current protection Download PDFInfo
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- CN105071062A CN105071062A CN201510593775.9A CN201510593775A CN105071062A CN 105071062 A CN105071062 A CN 105071062A CN 201510593775 A CN201510593775 A CN 201510593775A CN 105071062 A CN105071062 A CN 105071062A
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- graphite
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- earth electrode
- composite graphite
- soil
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Abstract
The invention discloses an application of a graphite grounding connector for stray current protection. Graphite grounding connectors are arranged around a protected metal component in the soil, and the narrow sides of the graphite grounding connectors are arranged in parallel with the surface of the soil. Each graphite grounding connector comprises an inner composite graphite harness and an outer composite graphite wire braided layer coating the inner composite graphite harness; the inner composite graphite harness is composed of composite graphite wires which are arranged in parallel into m rows and n columns, wherein 2*m<=n<=10*m; and the outer composite graphite wire braided layer is braided with composite graphite wires, wherein the composite graphite wires are formed by twisting composite graphite ribbons, each composite graphite ribbon is composed of two vermicular graphite layers and a skeleton fiber laid between the two vermicular graphite layers, the skeleton fibers are coated with an adhesive layer, and the skeleton fibers include glass fibers and carbon fibers. Compared with the existing stray current protection technology, operators only need to lay graphite grounding connectors around a protected metal component, the construction is simple, and the range of application is wide.
Description
Technical field
The present invention relates to electrochemical corrosion technical field, particularly relate to a kind of application of fountain graphite earth electrode.
Background technology
Stray current corrosion also claims galvano-cautery or interference corrosion, is the corrosion caused by external stray current.So-called stray electrical current is exactly the electric current flowed on non-designated loop, and the hardware in soil or aqueous medium all may produce stray current corrosion, also often can run into stray electrical current impact in Cathodic Protection System.
In the direct current power circuitry run, conductor belonging to it or equipment is more than one point earth again, so this electric device just likely produces DC stray current, the earth electrode etc. of the railway locomotive of such as DC electric railroad, subterranean railway, industrial and mineral, tramcar, DC transmission system, all may in soil generating portion drain, this electric current turns back to electric power loop at another place from soil.Now will cause stray current corrosion to being in two interelectrode hardwares.
The essence of stray current corrosion is electrolytic corrosion, and its etching extent is directly proportional to stray electrical current intensity, obeys Faraday's laws of electrolysis.Because the current potential in stray electrical current source is often very high, current strength is generally comparatively large, therefore the corrosion that stray electrical current causes is usually strong than general corrosion.As being the steel pipe of 7 ~ 8mm with the wall thickness of electric railroad parallel lay-up, within 4 ~ 5 months, just corrosion failure can be there is.And the coverage of stray electrical current is sometimes far, the underground metalliferous component outside dozens of kilometres even can be affected.
The measures such as the guard method at present for stray current corrosion mainly comprises minimizing interference source earial drainage, hardware lays away from interference source, drainage protection.But along with the development year by year of present electric power railway, UHV Transmission Engineering, want to allow underground metalliferous component avoid DC influence source completely and be difficult to realize; In addition, drainage protection construction is complicated, the selection of drainage effect and drainage point, drainage mode, discharge capacity define much relations, applicable surface is narrower.
Summary of the invention
For prior art Problems existing, the invention provides a kind of application of fountain graphite earth electrode of easy construction.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
The fountain application of graphite earth electrode, is characterized in: be located in soil around protected hardware by graphite earth electrode, and makes the narrow limit of graphite earth electrode cross section parallel with soil surface; Described graphite earth electrode comprises the outer composite stone line of ink marker braid wrapped up outside internal layer composite graphite wire harness and internal layer composite graphite wire harness, and internal layer composite graphite wire harness is arranged in m row n row by composite graphite line parallel and forms, 2m≤n≤10m; Outer composite stone line of ink marker braid is woven by the composite stone line of ink marker and obtains; Wherein, the composite stone line of ink marker is obtained by composite stone ink ribbon twisted, and composite stone ink ribbon comprises two-layer myrmekite layer of ink and is laid in the fibrous skeleton of two-layer graphite layers, and fibrous skeleton is coated with adhesive phase, and described fibrous skeleton comprises glass fibre and carbon fiber.
As preferably, fibrous skeleton diameter is 0.08 ~ 0.2mm.
As preferably, adhesive phase is ethyl acrylate water-soluble binder layers or resinae water-soluble binder layers.
Graphite earth electrode is laid in around protected hardware; namely graphite earth electrode forms shield layer around protected hardware; the stray electrical current that external interference source produces is when flowing through near protected hardware; the low impedance path provided due to graphite earth electrode and the overwhelming majority by graphite earth electrode distally diffusing, thus protect hardware.
When graphite earth electrode is used for stray electrical current protection, angle parallel with soil surface for the narrow limit of graphite earth electrode cross section is laid into soil, effectively can increase graphite earth electrode and the longitudinal contact area of soil like this, thus improve stock utilization.
Graphite earth electrode is made up of graphite completely due to its conductive bodies, and not containing any metal ingredient, therefore graphite earth electrode inherently has excellent corrosion resistance, does not worry the etching problem of earth electrode itself when using it for fountain.
Compared to the prior art, tool of the present invention has the following advantages and beneficial effect:
1 compares with existing fountain technology, and the present invention only needs graphite earth electrode to be laid in around protected hardware, and easy construction is widely applicable.
2, graphite earth electrode of the present invention have lightweight, resistance is little, flexible, preparation technology is simple, the advantage such as with low cost, when using it for fountain, be easy to construction, and protection effect is excellent.
Accompanying drawing explanation
Fig. 1 is the cross sectional representation of graphite earth electrode in embodiment;
Fig. 2 ~ 3 are the fountain application schematic diagram of graphite earth electrode in embodiment;
Fig. 4 is fountain schematic diagram of the present invention.
In figure, 1-internal layer composite graphite wire harness, 2-outer composite stone line of ink marker braid, 3-metallic conduit, 4-graphite earth electrode, 5-insulated connecting piece, 6-first hot spot, 7-second hot spot, 8-soil surface.
Embodiment
In concrete enforcement, the main raw materials of the present invention comprise carbon content higher than 85% high-purity worm graphite, ethyl acrylate water-soluble binder, glass fibre and carbon fiber.Carry out roll-in to worm graphite and make that smooth surface is smooth, the uniform worm graphite paper of thickness, worm graphite paper thickness is advisable with 0.1 ~ 1mm, and worm graphite paper thickness is excessive, and during twisted, graphite tape easily ruptures.
The concrete preparation method of composite stone ink ribbon is as follows: adopt adhesive glass fibre and carbon fiber top layer to be infiltrated, and be equidistantly laid between upper and lower two-layer worm graphite paper, adjacent fiber interval 0.5mm ~ 1.2mm.60 ~ 100s is kept to carry out thermosetting process in 80 ~ 120 DEG C of temperature; Then, composite graphite paper is obtained through more than twice roll-in.Further, cut the composite stone ink ribbon that composite graphite paper obtains width 10mm ~ 25mm, gained composite graphite belt surface should be smooth, and exoskeletal fiber exposes graphite tape top layer.
Twisted is carried out to composite graphite band and obtains the composite stone line of ink marker, composite graphite line parallel is arranged in m and arranges n row formation internal layer composite graphite wire harness, adopt braiding machine at the outer woven outer layer composite stone line of ink marker braid of internal layer composite graphite wire harness, obtain fountain graphite earth electrode.Fig. 1 is a kind of cross-sectional view of concrete fountain graphite earth electrode, and wherein, internal layer composite graphite wire harness one-tenth 2 arranged in parallel arranges 7 row.
Fig. 2 ~ 3 are the fountain application schematic diagram of graphite earth electrode in embodiment, and wherein Fig. 2 is vertical view, and Fig. 3 is end view.In the present embodiment; 4 graphite earth electrodes (4) are laid in metallic conduit (3) surrounding; the protected hardware of metallic conduit (3) i.e., graphite earth electrode (4) is parallel to metallic conduit (3) and the narrow limit of its cross section is parallel to soil surface (8).
Fig. 4 is the schematic diagram of the application of fountain shown in Fig. 2 ~ 3, and in figure, R1 represents the contact resistance between the first hot spot (6) and soil, R
goldrepresent flow passage component metallic conduit (3) bulk resistance, R2 represents the contact resistance between the second hot spot (7) and soil, and R3 represents the contact resistance between graphite earth electrode (4) and soil; R
stonerepresent the bulk resistance of flow passage component graphite earth electrode (4); R4 represents the contact resistance between graphite earth electrode (4) and soil.Total institute is known, and the bulk resistance of graphite earth electrode is the contact resistance be far smaller than between itself and soil.Now, determine that the key factor of low impedance path's resistance is contact resistance R3, the R4 at graphite earth electrode two ends.Metallic conduit only has hot spot local to contact with soil because the insulating corrosion layer on surface causes; this contact resistance must be far longer than the graphite earth electrode that entirety is laid in soil; the new low impedance path resistance be then made up of resistance R3, R4 certainly will be significantly less than the low impedance path be originally made up of resistance R1, R2; DC stray currents a large amount of in that soil will flow to a distant place via new low impedance path, thus reach stray current corrosion containment objective.
Embodiment
Adopt the composite graphite line parallel of 30 diameter 2.2mm to be arranged in 3 row 10 and arrange formation internal layer composite graphite wire harness, the composite stone line of ink marker of outer 24 diameter 2.2mm of employing weaves with wrapping inner layer composite graphite wire harness, obtain the fountain graphite bonded earth electrode of structure as Fig. 1, adopt four-electrode method microresistivity survey the present embodiment graphite bonded earth electrode every meter of resistance about 100 milliohm.
Illustrate this patent described in above-described embodiment; though be described by specific term in literary composition; but the protection range of this patent can not be limited with this; the personage being familiar with this technical field can change it or revise and reach equivalent object after the spirit understanding this patent and principle; and this equivalence is changed and amendment, all should be covered by right and define in category.
Claims (3)
1. the fountain application of graphite earth electrode, is characterized in that:
Graphite earth electrode is located in soil around protected hardware, and makes the narrow limit of graphite earth electrode cross section parallel with soil surface; Described graphite earth electrode comprises the outer composite stone line of ink marker braid wrapped up outside internal layer composite graphite wire harness and internal layer composite graphite wire harness, and internal layer composite graphite wire harness is arranged in m row n row by composite graphite line parallel and forms, 2m≤n≤10m; Outer composite stone line of ink marker braid is woven by the composite stone line of ink marker and obtains; Wherein, the composite stone line of ink marker is obtained by composite stone ink ribbon twisted, and composite stone ink ribbon comprises two-layer myrmekite layer of ink and is laid in the fibrous skeleton of two-layer graphite layers, and fibrous skeleton is coated with adhesive phase, and described fibrous skeleton comprises glass fibre and carbon fiber.
2. the fountain application of graphite earth electrode as claimed in claim 1, is characterized in that:
Described fibrous skeleton diameter is 0.08 ~ 0.2mm.
3. the fountain application of graphite earth electrode as claimed in claim 1, is characterized in that:
Described adhesive phase is ethyl acrylate water-soluble binder layers or resinae water-soluble binder layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510593775.9A CN105071062B (en) | 2015-09-17 | 2015-09-17 | The application of fountain graphite grounding body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510593775.9A CN105071062B (en) | 2015-09-17 | 2015-09-17 | The application of fountain graphite grounding body |
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| Publication Number | Publication Date |
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| CN105071062A true CN105071062A (en) | 2015-11-18 |
| CN105071062B CN105071062B (en) | 2019-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510593775.9A Active CN105071062B (en) | 2015-09-17 | 2015-09-17 | The application of fountain graphite grounding body |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107342467A (en) * | 2017-07-06 | 2017-11-10 | 潘龙雨 | A kind of carbon fiber composite alloy grounding body |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201946767U (en) * | 2010-12-27 | 2011-08-24 | 成都桑莱特科技股份有限公司 | Current drainage grounding device |
| CN202513296U (en) * | 2012-01-09 | 2012-10-31 | 江苏安荣电气设备有限公司 | Anti-theft earthing terminal of stray current drainage net |
| CN104638387A (en) * | 2015-02-26 | 2015-05-20 | 广东电网有限责任公司佛山供电局 | Graphite composite grounding body and manufacturing body thereof |
| CN204512796U (en) * | 2015-03-23 | 2015-07-29 | 魏蓓 | A kind of metallic conduit thunder and lightning corrosion protection apparatus and pipe-line system |
-
2015
- 2015-09-17 CN CN201510593775.9A patent/CN105071062B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201946767U (en) * | 2010-12-27 | 2011-08-24 | 成都桑莱特科技股份有限公司 | Current drainage grounding device |
| CN202513296U (en) * | 2012-01-09 | 2012-10-31 | 江苏安荣电气设备有限公司 | Anti-theft earthing terminal of stray current drainage net |
| CN104638387A (en) * | 2015-02-26 | 2015-05-20 | 广东电网有限责任公司佛山供电局 | Graphite composite grounding body and manufacturing body thereof |
| CN204512796U (en) * | 2015-03-23 | 2015-07-29 | 魏蓓 | A kind of metallic conduit thunder and lightning corrosion protection apparatus and pipe-line system |
Non-Patent Citations (1)
| Title |
|---|
| 刘华印等: "《石油地面工程技术进展》", 31 August 2006, 石油工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107342467A (en) * | 2017-07-06 | 2017-11-10 | 潘龙雨 | A kind of carbon fiber composite alloy grounding body |
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| CN105071062B (en) | 2019-03-01 |
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