CN1068957C - Grounding resistance depressant of rare earth for lightning protection - Google Patents
Grounding resistance depressant of rare earth for lightning protection Download PDFInfo
- Publication number
- CN1068957C CN1068957C CN98118266A CN98118266A CN1068957C CN 1068957 C CN1068957 C CN 1068957C CN 98118266 A CN98118266 A CN 98118266A CN 98118266 A CN98118266 A CN 98118266A CN 1068957 C CN1068957 C CN 1068957C
- Authority
- CN
- China
- Prior art keywords
- rare earth
- reducing agent
- resistance reducing
- type
- powder
- 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
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 38
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 38
- 230000000994 depressogenic effect Effects 0.000 title claims description 12
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 40
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 230000007797 corrosion Effects 0.000 claims abstract description 12
- 238000005260 corrosion Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000010521 absorption reaction Methods 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000004115 Sodium Silicate Substances 0.000 claims description 5
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 5
- 239000004927 clay Substances 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 5
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 4
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 claims description 4
- 229910000165 zinc phosphate Inorganic materials 0.000 claims description 4
- NDKWCCLKSWNDBG-UHFFFAOYSA-N zinc;dioxido(dioxo)chromium Chemical compound [Zn+2].[O-][Cr]([O-])(=O)=O NDKWCCLKSWNDBG-UHFFFAOYSA-N 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims 2
- 239000002689 soil Substances 0.000 abstract description 8
- 239000002253 acid Substances 0.000 abstract description 4
- 238000005536 corrosion prevention Methods 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 235000011837 pasties Nutrition 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Manufacturing Of Electrical Connectors (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
The present invention relates to a resistance reducing agent of rare earth for lightning protection grounding engineering, which is composed of an A type resistance reducing agent of rare earth and a B type resistance reducing agent of rare earth, wherein the A type resistance reducing agent of rare earth has a corrosion prevention function on metal grounding bodies, and the B type resistance reducing agent of rare earth has high electric conductive performance and water absorption performance. The A type resistance reducing agent of rare earth and the B type resistance reducing agent of rare earth are matched to use, which enables grounding problems of high soil resistivity areas and the problems of grounding body metal corrosion of acid soil and soil with a large amount of water to be fully solved. Thus, the present invention has wide application on lightning protection grounding engineering.
Description
The present invention is a kind of grounding resistance depressant of rare earth for lightning protection that can prevent earth electrode metal surface heavy corrosion.
The earth electrode that adopts on the lightning protection engineering at present all is the metal material manufacturing.The metal earth electrode contacts generation chemistry or electrochemical reaction with surrounding medium and causes corrosion in soil.The rare earth grounded resistance reducing agent of past exploitation is only considered the conductivity of its chemical analysis and has been ignored the protection that the metal earth electrode is corroded, thereby the corrosion of ground network large-area metal occurs.Because this major defect is affected applying of rare earth resistance reducing agent.
Purpose of the present invention solves above-mentioned resistance reducing agent corroding metal earth electrode problem exactly, and a kind of grounding resistance depressant of rare earth for lightning protection that uses and earth electrode is had good corrosion-resisting function in acid ground and Duo Shui low lying areas is provided.
The object of the present invention is achieved like this: at first the rare earth resistance reducing agent is divided into two kinds of A type and Type Bs by purposes, the Main Ingredients and Appearance in these two types of resistance reducing agents is still the strong carbon and graphite material of conductivity, and just adhesive is different with the additive composition.The corrosion inhibiter trbasic zinc phosphate or the zinc chromate of preventing metal corrosion are arranged in A type resistance reducing agent, and its adhesive is made up of cement, sodium silicate and water-proof solidifying agent, and the rare earth composition is the rare earth ferrosilicon alloy powder.And the Type B resistance reducing agent is only considered its high conductivity and water absorption, and its adhesive adopts white clay powder and gypsum, and the rare earth composition is the bastnaesite powder.When in engineering, using, earlier A type preventing metal corrosion resistance reducing agent is wrapped in around the earth electrode, and then Type B conduction, suction type resistance reducing agent are wrapped in A type resistance reducing agent periphery.So prevent effectively the corrosion of metal earth electrode and resistance reducing agent high conductivity is arranged again and be subjected to lightning impulse current by the time negative resistance charactertistic.
A type resistance reducing agent of the present invention is owing to adopted the trbasic zinc phosphate or the zinc chromate of preventing metal corrosion, and adhesive has adopted cement, sodium silicate and water-proof solidifying agent.Its this composition determined earth electrode in acid ground and the Duo Shui low lying areas can not produce serious corrosion of metals when using, and the adhesive of Type B resistance reducing agent adopts white clay powder and land plaster, thereby make resistance reducing agent have very strong water absorption and strengthened its conductivity, the problem with grounding with high soil resistivity is used in such resistance reducing agent preparation, and earth electrode anticorrosion problem all is resolved in acid ground and the many water and soil earth.
Embodiments of the invention compound method and technology are as follows:
One, the enforcement prescription of grounding resistance depressant of rare earth for lightning protection
A type rare earth resistance reducing agent prescription
Material rate (weight %)
Rare earth ferrosilicon alloy powder 5%
Land plaster 34%
Anode carbon dust 35%
Cement 10%
Solid sodium silicate powder 10%
Trbasic zinc phosphate (or zinc chromate) 4%
Water-proof solidifying agent 2%
Type B rare earth resistance reducing agent prescription
Material rate (weight %)
Bastnaesite powder 5%
Land plaster 15%
Anode carbon dust 60%
White clay powder 15%
Land plaster 5%
Two, grounding resistance depressant of rare earth for lightning protection production technology
Fall the assorted powder that is ground into A type and each raw material mineral of Type B rare earth resistance reducing agent are selected, putting into after blender stirs by the formula rate metering respectively then is exactly finished product (technical process is seen accompanying drawing).
Accompanying drawing 1 is an A type grounding resistance depressant of rare earth for lightning protection process drawing
Accompanying drawing 2 is Type B grounding resistance depressant of rare earth for lightning protection process drawings
Three, using method
Dig earlier during the horizontal grounding body construction groove, sprinkle one deck Type B rare earth in the ditch baseplane and fall Resistance agent dry powder is blended in mixer with the Type B friction reducer with water with the A type then or container for stirring becomes Starchiness evenly wraps grounding body fully with pasty state A type Rare-Earth Resistance Dropping Agent again. Top operation is complete When becoming to treat after 40 minutes that A type friction reducer has solidified firmly, again pasty state Type B friction reducer is wrapped in A Outside the type friction reducer, treat that pasty state Type B friction reducer has solidified to put into trench when hardening and cover high-quality soil and fill out Even if implementing the worker finishes.
The Grounding Grids construction must be bored with rig at the ground channel bottom that digs and be cand be compared to the grounding body diameter Big 3～6 times hole, ground. Again that A type pasty state friction reducer is even Wrap grounding body fully, treat when it has solidified firmly the grounding body of wrapping A type friction reducer to be put into In the hole, ground, then Type B friction reducer and water are mixed into rarer muddy and fill with in the hole, ground, treat 2～3 Even if pulpous state Type B friction reducer has solidified and high-quality soil is entered trench compacting construction has finished afterwards after hour.
Four, grounding resistance depressant of rare earth for lightning protection technical situation.
Through Wuhan High Voltage Research Institute test, A type and Type B grounding resistance depressant of rare earth for lightning protection properties Index all is better than Electricity Department song standard. Concrete technical performance index is as follows:
Room temperature resistivity=0.52 Ω .M
Resistivity behind the water soaking=0.95 Ω .M
Resistivity after the dehydration=0.78 Ω .M
Dash current resistance test △ R=-6%
Power current resistance test △ R=-12%
Stability test Rmax/R=1.29
PH=10.6
Round steel surface average corrosion rate=(0.005～0.009) mm/.
Claims (2)
1, a kind of is the grounding resistance depressant of rare earth for lightning protection of primary raw material with rare earth ferrosilicon alloy powder, graphite powder, anode carbon dust, white clay powder and sodium silicate, and it is characterized in that: this resistance reducing agent prescription is divided into two types: A type rare earth resistance reducing agent prescription is rare earth ferrosilicon alloy powder 5%, graphite powder 34%, anode carbon dust 35%, cement 10%, solid sodium silicate powder 10%, trbasic zinc phosphate (or zinc chromate) 4%, water-proof solidifying agent 2%.Type B rare earth resistance reducing agent prescription is bastnaesite powder 5%, graphite powder 15%, anode carbon dust 60%, white clay powder 15%, land plaster 5%.
2, grounding resistance depressant of rare earth for lightning protection according to claim 1, it is characterized in that: A type rare earth resistance reducing agent wraps the metal earth electrode fully earlier and plays the preventing metal corrosion effect, and Type B rare earth resistance reducing agent plays the effect of water absorption high conductivity outside being wrapped in A type rare earth resistance reducing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98118266A CN1068957C (en) | 1998-09-30 | 1998-09-30 | Grounding resistance depressant of rare earth for lightning protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98118266A CN1068957C (en) | 1998-09-30 | 1998-09-30 | Grounding resistance depressant of rare earth for lightning protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1249524A CN1249524A (en) | 2000-04-05 |
| CN1068957C true CN1068957C (en) | 2001-07-25 |
Family
ID=5226004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98118266A Expired - Fee Related CN1068957C (en) | 1998-09-30 | 1998-09-30 | Grounding resistance depressant of rare earth for lightning protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1068957C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100372177C (en) * | 2004-09-15 | 2008-02-27 | 马春兰 | An electrochemical grounding body |
| CN104810631A (en) * | 2015-04-23 | 2015-07-29 | 国家电网公司 | Ground connection resistance reduction composite padding for acid red soil |
| CN104934731B (en) * | 2015-06-03 | 2017-03-01 | 中国长江三峡集团公司 | A kind of arrester ground pole resistance-reducing device and its fall resistance method |
| CN106710664A (en) * | 2016-11-21 | 2017-05-24 | 国网甘肃省电力公司经济技术研究院 | High-conductivity calcined petroleum coke and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1030666A (en) * | 1988-03-28 | 1989-01-25 | 傅辅成 | Inorganic-chemical solid reducer of ground resistance |
| CN1050638A (en) * | 1989-09-26 | 1991-04-10 | 袁淑惠 | Grounded resistance reducing agent |
-
1998
- 1998-09-30 CN CN98118266A patent/CN1068957C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1030666A (en) * | 1988-03-28 | 1989-01-25 | 傅辅成 | Inorganic-chemical solid reducer of ground resistance |
| CN1050638A (en) * | 1989-09-26 | 1991-04-10 | 袁淑惠 | Grounded resistance reducing agent |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1249524A (en) | 2000-04-05 |
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