CN2143828Y - Safety earthing device - Google Patents
Safety earthing device Download PDFInfo
- Publication number
- CN2143828Y CN2143828Y CN 92242757 CN92242757U CN2143828Y CN 2143828 Y CN2143828 Y CN 2143828Y CN 92242757 CN92242757 CN 92242757 CN 92242757 U CN92242757 U CN 92242757U CN 2143828 Y CN2143828 Y CN 2143828Y
- Authority
- CN
- China
- Prior art keywords
- graphite
- graphite body
- copper
- earth electrode
- utility
- 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.)
- Expired - Fee Related
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 62
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 62
- 239000010439 graphite Substances 0.000 claims abstract description 62
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052802 copper Inorganic materials 0.000 claims abstract description 29
- 239000010949 copper Substances 0.000 claims abstract description 29
- 238000005266 casting Methods 0.000 claims abstract description 6
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 5
- 239000000956 alloy Substances 0.000 claims abstract description 5
- 239000003292 glue Substances 0.000 claims description 6
- 239000000565 sealant Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 4
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 241000209094 Oryza Species 0.000 description 5
- 235000007164 Oryza sativa Nutrition 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 235000009566 rice Nutrition 0.000 description 5
- 229910000906 Bronze Inorganic materials 0.000 description 4
- 239000010974 bronze Substances 0.000 description 4
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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- Manufacturing Of Electrical Connectors (AREA)
Abstract
The utility model relates to a safety grounding device, comprising a graphite body and a cable leading wire which is assembled in the graphite body, wherein, the peripheral grooves of the graphite body are sealed with cylindrical copper bodies by making use of the adhesive-casting graphite bodies. The cylindrical copper bodies are extended in the deep hole part at the middle part of the graphite body, and are poured by lead-base alloy with the hang-stannum core-wire inserting point of the end of the cable leading wire. Thus, the copper bodies, the graphite body and the cable leading wire are integrally combined. The hole opening of the graphite body is sealed with the sealing gum. The utility model has the advantages of small size, high safety, long service life, low cost, convenient construction, stable characteristic, and low labour intensity.
Description
The utility model relates to a kind of safety grounding device that is used for anti-thunder and lightning and personnel protection.
At present, at electric power system, communication system, petrochemical industry place, machining equipment and some high-rises etc., earthing device is arranged for preventing thunder and lightning, guarantee personal safety, setting up.General earthing device commonly used mostly is the metal earth electrode.The easy oxidation and rusting of earth electrode that is made of metals such as copper mesh and steel pipes corrodes, earth resistance is raise, often 3-5 just rots, and useful life is shorter, therefore, need to rebuild every year or bury underground again, this not only wastes a large amount of metal materials, labor intensive, fund, and cause the earth electrode unstable properties, the poor reliability of anti-thunder and lightning jeopardizes personal safety and device security.For overcoming the drawback that the metal earth electrode exists, the graphite earth electrode has appearred, and it is applied with advantage anti-oxidant, corrosion resistance and good.But because of graphite belongs to nonmetallic materials, its electric conductivity is relatively poor, can not show a candle to metal material, and compares with metal material, and the big inconvenience construction of volume influences it and further promotes the use of.
The purpose of this utility model provides a kind of safety grounding device, it is enough to overcome the shortcoming of prior art, have volume little, be convenient to construction, stability of characteristics, safe and reliable, the advantage that obviously improves useful life, reduces maintenance cost, reduces labor intensity.
The purpose of this utility model is achieved in that this device comprises graphite body and assembling cable tail wherein, it is characterized in that utilizing in the graphite body perimeter trench glue casting graphite body to be packaged with cylindricality copper body, the copper body stretches into the tining heart yearn splicing position of graphite body middle part deep hole part and cable tail end, pour into lead-containing alloy, copper body, graphite body, cable tail are struck up partnership, and place, graphite body aperture is packaged with fluid sealant.
Because the utility model adopts glue casting graphite body that cylindricality copper body is encapsulated in the graphite body groove, and seal with fluid sealant, make copper body graphite earth electrode, so it is oxidized to guarantee that the copper body is difficult for, effectively prevent its corrosion, prolong earth electrode useful life, overcome the shortcoming that existing metal earth electrode exists.Stretch into the tining heart yearn splicing position of bore portion and cable tail end in the graphite body because of the copper body, the employing lead-containing alloy strikes up partnership, so firm welding of copper and copper, must be connected fastening with copper than the graphite body of existing graphite earth electrode, and contact resistance is descended significantly, significantly improve grounding characteristics and safety and reliability, owing to improve serviceability and life-span, so need not rebuild or bury underground again earthing device every year, this not only saves a large amount of metal materials, manpower, fund, and reduces maintenance cost and significantly alleviate people's labour intensity.This device is compacter more than graphite earth electrode structure, is easy to carry and constructs, so easier applying.
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is a kind of concrete structure schematic diagram of the utility model.
Fig. 2 is the cutaway view of Fig. 1 along the A-A line.
Describe concrete structure of the present utility model in detail according to Fig. 1-2.This safety grounding device is a copper body graphite earth electrode, and it comprises graphite body 1, cylindricality copper body 2.Cable tail 6 parts such as grade.Wherein graphite body 1 periphery is processed with the axial groove of the cylindricality copper body 2 of can packing into, and channel bottom laterally is processed with the hole that communicates with graphite body 1 middle part deep hole.Cylindricality copper body 2 is packed into behind the groove, and its bottom is inserted in channel bottom transverse holes, until stretching into deep hole place, graphite body 1 middle part.Cast the perimeter trench that graphite body 3 tamps graphite body 1 with glue again, equating is whole.Glue casting graphite body 3 is the pastes that adopt fine graphite powders and electrically conducting adhesive to stir and make.Paste is tamped in the groove of graphite body 1 glue casting graphite body 3.Cable tail 6 stretches into the end of graphite body 1 middle part deep hole part, peels the heart yearn difference tining that insulating barrier exposes off, intersects with the copper body 2 that stretches into graphite body 1 deep hole part to be plugged on.The quantity of cylindricality copper body 2 can be chosen according to actual needs, and present embodiment joins with four cylindricality copper bodies 2 and a Stranded cable lead-in wire 6 of symmetric arrangement.The copper body 2, the tining heart yearn that intersection are plugged on together pour into lead-containing alloy 4 again, and cylindricality copper body 2, graphite body 1, cable tail 6 are struck up partnership.At place, aperture, graphite body 1 middle part filling with sealant 5, make cable tail 6 and the encapsulation of graphite body 1 junction at last, to avoid the cable tail corrosion in the graphite body opening.Graphite body 1 profile can be made shapes such as cylinder, prism or flat cylinder on request.Copper body 2 can be solid or hollow cylindrical body.Its profile also can be shapes such as cylinder, prism or flat cylinder.
The method for embedding of this device can be determined according to instructions for use, the situations such as place, operating condition of burying underground.If adopt the method for embedding of long-acting liquid resistance reducing agent, can cancel splice tray and water injection pipe.Its resistance reducing agent amount ratio metal earth electrode is few, and easy construction is effective.Various earth electrode internal resistance measurement values are compared as follows table:
| Earth electrode kind (rice) | Internal resistance value (ohm) | |
| L=0.8 rice L=0.5 rice | ||
| φ 0.033 steel pipe φ 0.125 graphite φ 0.150 graphite φ 0.125 bronze medal body graphite φ 0.150 bronze medal body graphite | 0.00054 0.00058 0.00040 | 0.00033 0.00037 0.00025 0.00017 0.00014 |
As seen from the above table, 0.5 meter the utility model copper body graphite earth electrode descends about 50% than the internal resistance of isometric graphite earth electrode, on average descend about 68.3% than the internal resistance of 0.8 meter graphite earth electrode.Earth electrode of the present utility model can be realized miniaturization, so can obviously save material and fund.
Various earth electrode contact internal resistance measurement values are compared as follows table:
| The earth electrode kind | Contact internal resistance value (ohm) |
| L=0.5 rice | |
| φ 0.125 graphite φ 0.150 graphite φ 0.125 bronze medal body graphite φ 0.150 bronze medal body graphite | 0.00364 0.00221 0.00053 0.00072 |
The utility model earth electrode is than the contact internal resistance decline manyfold of isometric graphite earth electrode as seen from the above table.Decline significantly because of the contact internal resistance of the utility model earth electrode, so it is a lot of that its ground connection internal resistance is descended than isometric graphite ground connection internal resistance, this earth electrode is obtained in the nature of things than the better grounding characteristics of graphite earth electrode, the actual measurement earth resistance is 3.7-4.3 ohm, than φ 0.125 * 0.8(rice of burying underground in the same soil property) earth resistance 5.0-5.9 ohm of graphite earth electrode is far better.
When installing and using, when an earth electrode can not be satisfied the demand, can suitably bury many earth electrodes more than two underground.
Claims (3)
1, a kind of safety grounding device, comprise graphite body and assembling cable tail wherein, it is characterized in that utilizing in the graphite body perimeter trench glue casting graphite body to be packaged with cylindricality copper body, the copper body stretches into the tining heart yearn splicing position of graphite body middle part deep hole part and cable tail end, pour into lead-containing alloy, copper body, graphite body, cable tail are struck up partnership, and place, graphite body aperture is packaged with fluid sealant.
2, safety grounding device according to claim 1 is characterized in that the graphite body profile can be cylinder, prismatic, flat cylinder.
3, safety grounding device according to claim 1 is characterized in that the copper body can be solid or hollow cylindrical body, and its profile can be cylinder, prism, flat cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92242757 CN2143828Y (en) | 1992-12-16 | 1992-12-16 | Safety earthing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92242757 CN2143828Y (en) | 1992-12-16 | 1992-12-16 | Safety earthing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2143828Y true CN2143828Y (en) | 1993-10-13 |
Family
ID=33782490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92242757 Expired - Fee Related CN2143828Y (en) | 1992-12-16 | 1992-12-16 | Safety earthing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2143828Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646799A (en) * | 2018-05-31 | 2018-10-12 | 国网西藏电力有限公司拉萨供电公司 | A kind of system and method for intelligent control High aititude high soil resistivity grounding resistance of transformer substation grounding net |
| CN111934131A (en) * | 2020-07-15 | 2020-11-13 | 长园电力技术有限公司 | Waterproof terminal and manufacturing method thereof |
-
1992
- 1992-12-16 CN CN 92242757 patent/CN2143828Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108646799A (en) * | 2018-05-31 | 2018-10-12 | 国网西藏电力有限公司拉萨供电公司 | A kind of system and method for intelligent control High aititude high soil resistivity grounding resistance of transformer substation grounding net |
| CN111934131A (en) * | 2020-07-15 | 2020-11-13 | 长园电力技术有限公司 | Waterproof terminal and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |