CN105910977A - Power transmission and transformation grounding material soil environment corrosivity comprehensive evaluation method - Google Patents
Power transmission and transformation grounding material soil environment corrosivity comprehensive evaluation method Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 90
- 230000009466 transformation Effects 0.000 title claims abstract description 76
- 230000005540 biological transmission Effects 0.000 title claims abstract description 74
- 238000011156 evaluation Methods 0.000 title claims abstract description 53
- 238000005260 corrosion Methods 0.000 claims abstract description 53
- 230000007797 corrosion Effects 0.000 claims abstract description 53
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- 238000004458 analytical method Methods 0.000 claims abstract description 20
- 150000003839 salts Chemical class 0.000 claims abstract description 7
- 238000005070 sampling Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims description 22
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 9
- 239000010962 carbon steel Substances 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 239000003153 chemical reaction reagent Substances 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
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- 238000001514 detection method Methods 0.000 claims description 3
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- 239000011733 molybdenum Substances 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 2
- 210000000746 body region Anatomy 0.000 claims description 2
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- 230000007613 environmental effect Effects 0.000 description 1
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Abstract
The invention provides a power transmission and transformation grounding material soil environment corrosivity comprehensive evaluation method. The method comprises dividing soil environment corrosivity into strong, middle, weak and minute levels, determining six evaluation indexes such as soil resistivity, soil quality, water content, pH, salt content and Cl<-> content, taking a sample in a grounding engineering soil region, analyzing soil indexes, carrying out sampling point soil environment scoring according to the analysis result, calculating the sum of the six index scores, utilizing the highest value of the total scores in the whole region as a grading score value of soil environment corrosivity of the region and determining a soil environment corrosivity level. The method realizes comprehensive consideration and analysis of power transmission and transformation grounding material environment use characteristics and soil corrosion main environment influence factors. Through synergism of the six evaluation indexes and a scientific evaluation system, the novel power transmission and transformation grounding material soil environment corrosivity comprehensive evaluation method with advantages of easiness, simpleness, high accuracy and high scientificity is provided.
Description
Technical field
The present invention relates to a kind of soil environment erosion analysis method, be particularly directed to the soil environment of project of transmitting and converting electricity to its ground connection
Material corrosive properties evaluation methodology.
Background technology
The reliability of project of transmitting and converting electricity earthing material is directly connected to electrical network and the safe operation of other important electric utility, the most also
It is directly connected to the personal safety of operations staff.Be in for a long time the earthing material in complicated ground corrosion environment can by the chemistry of soil,
Electrochemistry etc. are corroded, and some materials or parts the most just produce the potential safety hazards such as heavy corrosion, even fracture, serious shadow
Ring electric power netting safe running, jeopardize personal safety.And the inspection of earthed system, safeguard and update not a duck soup, this gives earthing material
Safe operation bring huge cost burden.Numerous studies show the difference of the earthing material corrosion rate of different soils environment very
Greatly, service life is the most significantly different.These differences show the etching problem of the earthing material soil environment kind residing with it and spy
Point has direct relation, so evaluating soil environment rationally, fast and accurately is power transmission and transformation earth work construction to its corrosivity
The important step indispensable with maintenance.
The present inventor through observing, study, find in some power transmission and transformation earth work construct and design for a long time, ground connection selection Main Basis
More existing regulations or such as " electric property and design manual " class handbook, its pay close attention to it is important that the ground connection of earthing material
The classical insulation such as resistance and contact potential, considers corrosion resistance and the residing soil environment of material its corrosive effects
Not enough.This deficiency causes and disconnects between earthing material and soil environment corrosion, blindly ground connection selection model classification is increased or decreased,
Cause and unsuitable cost is increased or decreased；Selection grade is low, and earthing material cannot meet engineering design demand service life, makes
Become the potential security risk of power transmission and transformation earth work and frequently construction.And inappropriate selection grade is too high, it is clear that cause unnecessary waste.
The most unarguable it turns out that existing " preventive trial code " is formulated under certain objective condition, always have
Limitation.
Self-evident, soil environment is the key factor of corrosion earthing material, and the earthing material top layer contacted forms corrosion electricity
Pond makes earthing material corrode, and Soil structure is complicated, and influence factor is numerous, the cross influence of various factors.Existing soil
Erosion analysis method has actual environment sheet embedding method and Analysis On Physical And Chemical Property assessment method.The former cost is more, and experimental period overflows
Long, region limitation is big, and the achievements conversion cycle is long, is unfavorable for actual application.Traditional classification of soils and evaluation methodology have list
Item metrics evaluation method (primary evaluation resistivity etc.), uses single index assessment method to evaluate soil corrosivity and only considers soil corrosivity
Some factors, it is impossible to accurately judge the corrosivity of actual soil environment.Due to the complicated variety of soil environment is recognized by
Step in-depth, it is proposed that more science, objective, many index integrated evaluating method accurately.
The A21.5 scoring of the U.S.'s " International Organization for Standardization " ANSI, Germany's " industrial standard " DIN50929 scoring are all
It it is the most wide variety of aggregative indicator rating method." Evaluating Soil Corrosivity method survey " (" corrosion science and guard technology "
Volume 5, the 4th in October, 1993 phase) article discloses the evaluation methodology of soil corrosivity, analyze various single index evaluation
Method and common many index integrated evaluating method.Author thinks that many index overall merit is sending out of Evaluating Soil Corrosivity method
Exhibition trend.
Due to the practical situation of each department soil texture, composition different, and industry-by-industry be actually needed difference, rotten for soil
Understanding and the concept of erosion are the most different, as U.S.'s ANSI A21.5 scoring does not consider soil corrosion effect extreme influence
The Cl of factor-Ion, and a large amount of high salt districts such as coastal and salt lake area is huge, therefore its soil corrosivity is not made by this method
Go out accurately judgement, the most also ignore the impact of the soil texture, fact proved that the soil texture is another that affect soil corrosion
Key factor.Meanwhile, the information of existing scoring method reflection is staggered to overlap, and the measurement of some parameter is the most difficult, and reality should
Being difficult in collect completely, the mathematics criterion selecting key parameter to foundation brings great difficulty.And lack of concrete industry
Easily operated standard (the concrete region buried underground such as different industries material is different, uses condition different etc.).The present inventor
Find that the soil environment corrosivity of power transmission and transformation earthing material has its industry particularity through substantial amounts of research, analysis.
Therefore, the specific question selection key parameter how to corrode for power transmission and transformation earthing material soil environment, and foundation is quick,
Simplicity, accurately integrated evaluating method are this field urgent problems.
Summary of the invention
It is an object of the invention to provide a kind of power transmission and transformation earthing material soil environment corrosivity integrated evaluating method, the method is reliable,
Simplicity, improves speed and the accuracy of power transmission and transformation earthing material Evaluating Soil Corrosivity, be suitable for power transmission and transformation earth work design and
Earthing material Evaluating Soil Corrosivity in fortune inspection.
A kind of power transmission and transformation earthing material soil environment corrosivity integrated evaluating method that the present invention provides, described method includes:
Measure power transmission and transformation earthing material and bury six evaluatings of regional soil corrosiveness of the environment underground；Described parameter delimited grading system.
Described parameter includes: power transmission and transformation earthing material buries resistivity N1 in regional soil environment, soil texture N3, aqueous underground
Rate N4, pH value N2, salinity N5 and Cl-Content N6.
Inventor is according to character and the corrosion row in soil environment thereof such as actual power transmission and transformation earthing material place soil environment physics and chemistry
For test and field study and analysis, draw the resistivity of soil, pH value, the soil texture, moisture content, salinity, Cl-Content
Six factors are the main factors affecting earthing material soil corrosion, determine that this six factor is soil environment erosion analysis index,
And above six factors have been carried out many set conditions investigation corrosion, by test and live data analysis, successfully obtain one
Power transmission and transformation earthing material soil environment corrosivity integrated evaluating method, the method is reliable, easy, improves power transmission and transformation earthing material
The speed of Evaluating Soil Corrosivity and accuracy, be suitable for earthing material soil corrosivity in the design of power transmission and transformation earth work and fortune inspection and comment
Valency.
Further, described method also includes described six indexs are done following evaluation: power transmission and transformation earthing material is buried underground by (1) respectively
Six indexs in regional soil environment are analyzed marking, and its standards of grading are as follows:
Soil resistivity N1 standards of grading are: N1 ＜ 20 Ω m, are 4.5 points；50 > N1 >=20 Ω m, is 3 points；N1 >=50 Ω m,
It it is 0 point；
PH value N2 standards of grading are: N2 ＜ 4.5, are 6.5 points；5.5 > N2 >=4.5, it is 4 points；7.0 > N2 >=5.5, it is 2 points；
8.5 > N2 >=7.0, are 1 point；N2 >=8.5, are 0 point；
Soil texture N3 standards of grading are: sand, are 2.5 points；Loam, is 1.5 points；Clay, is 0 point；
Soil moisture content N4 standards of grading are: 25% >=N4 >=12%, are 5.5 points；30% >=N4 > 25% or 12% > N4 >=10%,
It it is 3.5 points；40% >=N4 > 30% or 10% > N4 >=7%, is 1.5 points；N4 > 40% or 7% > N4, is 0 point；
Soil salt content N5 evaluation criterion is: N5 > 0.75%, is 3 points；0.75 >=N5 > 0.15%, is 2 points；0.15 >=N5 > 0.05%,
It it is 1 point；0.05% >=N5, is 0 point；
Cl-Content N6 evaluation criterion is: N6 > 0.05%, is 1.5 points；0.05% >=N6 > 0.01%, is 1 point；
0.01% >=N5 > 0.005%, is 0.5 point；0.005% >=N5, is 0 point；
(2) being added by six index score of described each sample point soil environment, respectively obtaining total score is N, determines its soil environment
Corrosion class, its opinion rating is as follows:
N=N1+N2+N3+N4+N5+N6,15 ＜ N are 4 grades；10 ＜ N≤15 are 3 grades；5 ＜ N≤10 are 2 grades；N≤5
It it is 1 grade.
Further, described power transmission and transformation earthing material buries region underground is high salt district.
Further, described power transmission and transformation earthing material is carbon steel.
Further, described power transmission and transformation earthing material is copper, galvanized steel or copper covered steel.
Further, described carbon steel composition is carbon 0.08-0.15, silicon 0.17-0.37, manganese 0.40-0.7, phosphorus by percentage to the quality
Less than 0.035, sulfur 0.035, chromium 0.3-0.6, molybdenum 0.25-0.35, nickel less than 0.3, copper is less than 0.3 and vanadium 0.15-0.3.
Further, bury arda sampling point underground at power transmission and transformation earthing material and be at least 3, depth selection and the earthing material depth of burying one
Cause, round in body region each sample point total score peak as this region power transmission and transformation corrosive grade of earth work soil environment
Score value.
Further, using BioVision test kit field quickly to detect chloride ion content N6, the range of linearity of detection is 20-120
Nanomole Cl-/ hole, detectable limit is 0.4 mM.
Further, use tester for water ratio quickly to detect moisture N4, use portable soil conductivity measuring instrument to measure conductance
Rate also calculates soil resistivity N1, uses pH reagent paper to measure soil pH value N2, and uses conductance method Quick testing instrument quickly to examine
Survey salinity N5.
The present invention also provides for a kind of for measuring the power transmission and transformation corrosive smart machine of earthing material soil environment, including power module,
These five parts of data acquisition module, MCU control module, LCD MODULE and voice playing module.
The one that the present invention provides is used for measuring the power transmission and transformation corrosive smart machine of earthing material soil environment, wherein, power supply mould
Block is made up of power supply module and high voltage direct current source module, is responsible for providing whole apparatus system reliable and stable working power
And stable Hi-pot test power supply；Above-mentioned six indexs are mainly acquired, are processed and transmitted to MCU by data acquisition module
Control module；MCU control module carries the work that each functional module to whole apparatus system is divided the work, coordinated, and
Can be analyzed measurement data scoring criterion according to the above analysis calculating；Output module has liquid crystal display and speech play two
Module composition, can facilitate tester to record and consult experimental data, it is thus achieved that power transmission and transformation earthing material soil environment corrosivity is comprehensive
Evaluation result.The work efficiency of overall merit can be effectively improved.
In the present invention, the optimal depth selection of power transmission and transformation earth work soil region is 0.6m.
Present invention specifically aims at the soil environment corrosivity overall merit of high salt district power transmission and transformation earthing material, have easy to carry out,
Accurately, succinct standard.
Table 1 soil corrosivity individual event Testing index evaluation score
Note: " % " content average mass percent in this table
Being added by six index score of each for test zone sample point soil environment, respectively obtaining total score is that N, N are equal to
N1+N2+N3+N4+N5+N6 sum.Take in each sample point evaluation index total score peak as this region power transmission and transformation ground connection work
Journey soil environment corrosive grade scoring value, determines its soil environment corrosion class, and its standards of grading are concrete such as table 2:
Table 2 Evaluating Soil Corrosivity grade
| N value | Soil corrosivity grade |
| 15 ＜ N | 4 (by force) |
| 10 ＜ N≤15 | 3 (in) |
| 5 ＜ N≤10 | 2 (weak) |
| N≤5 | 1 (micro-) |
Note: N is equal to (N1+N2+N3+N4+N5+N6) sum in table 1.
The beneficial effects of the present invention is:
The present invention has taken into full account environment handling characteristics and the soil corrosion Major environment impacts factor of project of transmitting and converting electricity earthing material,
By six evaluation indexes and the synergism of scientific evaluation system thereof, it is provided that simple, accuracy rate and scientific high defeated
Power transformation earth work soil environment erosion analysis new method.The method that the inventive method uses field to be prone to gather measures described finger
Chloride ion content, moisture, electrical conductivity and salinity in mark, can complete field power transmission and transformation earthing material soil conveniently and efficiently
Earth corrosiveness of the environment instant evaluation.Use BioVision test kit can the most quickly detect chloride ion content N6 in field, make marking
Result is accurate.One the most provided by the present invention is used for measuring intelligence power transmission and transformation earthing material soil environment is corrosive and sets
Standby, can quickly process collection data, obtain soil environment corrosivity comprehensive evaluation result constantly.The inventive method can be used for defeated change
Electrical ground engineering design and O&M stage, can be used for earth work selection and type selecting, improve the different soil of power transmission and transformation earth work reply
The ability of earth corrosive environment, reduces operation risk.
The evaluation criterion of six specific indexes addition sum of the present invention, and the score value ratio shared by each index, and often
The scoring criterion of index be all in practice long felt accumulation obtain for power transmission and transformation earth work field soil environment corrosivity
The optimum selection evaluated, evaluation procedure is clear and definite, terse, and operability is extremely strong, provides rare standardization standard for the same industry.
Accompanying drawing explanation
Fig. 1 is: one is used for measuring the power transmission and transformation corrosive smart machine of earthing material soil environment
Wherein: 1-data acquisition module, 2-power module, 3-MCU control module, 4-LCD MODULE, 5-speech play
Module.
Detailed description of the invention
Embodiment 1
Inventor's soil environment in more than 30 different power transmission and transformation earth work regions that national grid is covered by 2013-2015 is adopted
Soil resistivity, the soil texture, moisture content, pH value, salinity and Cl has been carried out by method of the present invention-Content six
The analysis of evaluation index, is made that evaluation to its soil environment corrosive grade.Enter at concrete power transmission and transformation earth work soil region
Row multidraw, sample point is 3, takes 3 sample point total score peaks grade as this regional soil corrosiveness of the environment
Score value, each depth selection is consistent with the earthing material depth of burying, and depth selection presses the concrete local ground engineering material depth of burying
It is as the criterion.Part soil environment specific targets analysis result is shown in Table 3.
Table 3 each sampling area region soil index analysis and evaluation result
BioVision test kit field is used the most accurately to detect chloride ion content.Tester for water ratio is used quickly to detect moisture
Content.
Portable soil conductivity measuring instrument is used to measure electrical conductivity and calculate soil resistivity N1.Use conductance method Quick testing instrument fast
Speed detection salinity.PH reagent paper is used to measure soil pH value.Range estimation obtains soil texture grade.
By above-mentioned six achievement datas input present invention be used for measure the power transmission and transformation corrosive smart machine of earthing material soil environment
Obtain evaluation result.
Soil environment in the multiple different power transmission and transformation earth work regions that national grid is covered by inventor uses of the present invention
While method carries out analysis and the evaluation of soil environment corrosive grade of six evaluation indexes, carry out in corresponding test area
The sample that buries on the spot of Q235 steel is tested, and its actual environmental corrosion degree is carried out test analysis, with checking and the contrast present invention side of evaluation
The accuracy of method.
It is 3 years that actual soil environment Q235 buries the sample test period, and burying the sample degree of depth is 0.6m or by concrete local ground engineering material
The depth of burying is as the criterion, and carries out corrosion weight loss analysis to burying the sample after sample has been tested by associated erosion Rate Test Method standard,
Calculate its corrosion rate, with reference to " power engineering design manual ", SY/T0087.1 " corrosion directly evaluation outside buried steel pipeline ",
State's net enterprise's mark " earth work anticorrosion technique specification ", draws the actual corrosion class of earthing material in soil environment.More than Can Zhao
Handbook and standard, soil corrosivity and the actual corresponding relation such as table 4 burying carbon steel material average corrosion rate underground.The most faithfully
Bury sample metal local corrosion extremely serious time, even if average corrosion rate is relatively low, soil environment corrosivity should be evaluated as by force (ginseng
See standard SY/T0087.1).(note: described carbon steel composition is carbon 0.13, silicon 0.27, manganese 0.57, phosphorus by percentage to the quality
0.031, sulfur 0.035, chromium 0.56, molybdenum 0.31, nickel 0.28, copper 0.27 and vanadium 0.25.
Table 4 standard buries average corrosion rate and the soil corrosivity grade corresponding relation of sample carbon steel
According to above-mentioned evaluation principle and method, the carbon that the soil environment in the different power transmission and transformation earth work regions that national grid covers is buried
The corrosion rate of steel curved beam and the actual soil environment corrosion class obtained by corrosion rate compare with evaluation methodology result of the present invention
Relatively analyzing, concrete outcome is shown in Table 5.
Table 5 power transmission and transformation earthing material soil environment corrosivity contrast table
It can be seen that the carbon steel soil environment in 20 different power transmission and transformation earth work regions buries sample test corruption from the result of table 5
Erosion speed and the actual soil environment corrosive grade obtained by corrosion rate evaluate soil environment corrosive grade result with the present invention
The most consistent.Carbon steel extent of corrosion in soil environment and soil property have obvious corresponding relation, main selected by the present invention
Soil environment corrosion evaluation index and evaluation methodology are feasible and accurately, may be used for the corrosion of power transmission and transformation earthing material soil environment
The aspects such as the evaluation of property and earthing material etching problem.
Embodiment 2
Inventor has carried out the simulation soil of indoor single factor test change respectively in indoor to each factor of power transmission and transformation earthing material soil corrosion
Earth corrosion testing, experimental study finds soil resistivity, the soil texture, moisture content, pH value, salinity and Cl in each factor-
The change of six evaluation indexes of content all creates significantly impact to the corrosion of power transmission and transformation earthing material, for power transmission and transformation earthing material
The major influence factors of soil corrosion.
In actual range, experimental study finds substantially to increase with the reduction earthing material soil corrosion rate of soil resistivity；Soil
Substantially increase with clay, loam, the change earthing material soil corrosion rate of sand loamy texture；Change soil with soil moisture content
Earth corrosion rate reduces after now increasing, and reaches maximum when >=12～≤25；With the rising earthing material soil of pH value in soil
Corrosion rate is gradually lowered；With the rising earthing material soil corrosion rate of salinity in soil, the trend gradually risen occurs；And
And with Cl in soil-The soil corrosion rate raising earthing material of content also occurs in that significantly raised trend.In conjunction with national grid
The research of the actual soil environment corrosion in more than the 30 of covering area different power transmission and transformation earth work regions finds, the laboratory results
Consistent with outdoor result of study.
Embodiment 3
Inventor is at the 2013-2015 soil ring to more than 30 different power transmission and transformation earth work regions of national grid covering area
In border, each soil corrosion influence factor has carried out deep analysis and research, and combines the actual soil in corresponding test area in example 1
The environment cycle is that the Q235 of 3 years buries sample test Corrosion results, is analyzed different soils corrosion principal element, finds soil
Resistivity, the soil texture, moisture content, pH value, salinity and Cl-Six evaluation indexes of content are power transmission and transformation earthing material soil
The major influence factors of corrosion.As under identical evaluation methodology (such as example 1), but evaluation procedure lacks arbitrary factor and all can
Power transmission and transformation earthing material soil corrosion evaluation result is produced large effect, causes a deviation, can reduce by soil corrosion factor
The corrosive accuracy of earthing material is evaluated in evaluation methodology.Under identical evaluation methodology, the actual soil environment cycle is with example 1
The Q235 of 3 years bury sample test Corrosion results comparative analysis research, any soil resistivity, the soil texture, moisture content, pH value,
Salinity and Cl-The accuracy of power transmission and transformation earthing material Evaluating Soil Corrosivity result is the most substantially reduced by five factors of choosing in content,
Its result is as shown in table 6.
Any six factors of table 6 are chosen the accuracy of five factor evaluation results
| Soil corrosion factor of evaluation | Disappearance factor of evaluation | Accuracy (%) |
| The soil texture, moisture content, pH value, salinity, Cl-Content | Soil resistivity | 73.5% |
| Soil resistivity, moisture content, pH value, salinity, Cl-Content | The soil texture | 81.6% |
| Soil resistivity, the soil texture, pH value, salinity, Cl-Content | Moisture content | 70.3% |
| Soil resistivity, the soil texture, moisture content, salinity, Cl-Content | PH value | 65.1% |
| Soil resistivity, the soil texture, moisture content, pH value, Cl-Content | Salinity | 80.3% |
| Soil resistivity, the soil texture, moisture content, pH value, salinity | Cl-Content | 86.1% |
It can be seen that the present invention evaluates corrosive six evaluation indexes of power transmission and transformation earthing material soil environment from the result of table 6
(soil resistivity, the soil texture, moisture content, pH value, salinity and Cl-Content) it is all power transmission and transformation earthing material soil rings
The key index of border erosion analysis, the accuracy lacking any one its evaluation result of index has significantly reduction.
Embodiment 4
The one that the present invention provides is used for measuring the power transmission and transformation corrosive smart machine of earthing material soil environment, wherein, power supply mould
Block 2 is made up of power supply module and high voltage direct current source module, is responsible for providing whole apparatus system reliable and stable work electricity
Source and stable Hi-pot test power supply；Above-mentioned six indexs are mainly acquired, are processed and transmitted to by data acquisition module 1
MCU control module 3；MCU control module carries each functional module to whole apparatus system and divides the work, coordinates
Work, and can be analyzed measurement data scoring criterion according to the above analysis calculating；Output module has liquid crystal display 4 and language
Sound plays 5 two module compositions, tester can be facilitated to record and consult experimental data, it is thus achieved that power transmission and transformation earthing material soil ring
Border corrosivity comprehensive evaluation result.The work efficiency of overall merit can be effectively improved.
Claims (10)
1. a power transmission and transformation earthing material soil environment corrosivity integrated evaluating method, it is characterised in that described method includes:
Measure power transmission and transformation earthing material and bury six evaluatings of regional soil corrosiveness of the environment underground；
Described parameter delimited grading system.
2. according to the power transmission and transformation earthing material soil environment corrosivity integrated evaluating method described in claim 1, it is characterised in that described
Parameter includes:
Power transmission and transformation earthing material bury underground resistivity N1 in regional soil environment, soil texture N3, moisture content N4, pH value N2,
Salinity N5 and Cl-Content N6；
Described parameter is done following evaluation: power transmission and transformation earthing material is buried underground the parameter in regional soil environment and carried out point by (1) respectively
Analysis marking, its standards of grading are as follows:
Soil resistivity N1 standards of grading are: N1 ＜ 20 Ω m, are 4.5 points；50 > N1 >=20 Ω m, is 3 points；N1 >=50 Ω m,
It it is 0 point；
PH value N2 standards of grading are: N2 ＜ 4.5, are 6.5 points；5.5 > N2 >=4.5, are 4 points；7.0 > N2 >=5.5, are 2 points；
8.5 > N2 >=7.0, are 1 point；N2 >=8.5, are 0 point；
Soil texture N3 standards of grading are: sand, are 2.5 points；Loam, is 1.5 points；Clay, is 0 point；
Soil moisture content N4 standards of grading are: 25% >=N4 >=12%, are 5.5 points；30% >=N4 > 25% or 12% > N4 >=10%,
It it is 3.5 points；40% >=N4 > 30% or 10% > N4 >=7%, is 1.5 points；N4 > 40% or 7% > N4, is 0 point；
Soil salt content N5 evaluation criterion is: N5 > 0.75%, is 3 points；0.75 >=N5 > 0.15%, is 2 points；0.15 >=N5 > 0.05%,
It it is 1 point；0.05% >=N5, is 0 point；
Cl-Content N6 evaluation criterion is: N6 > 0.05%, is 1.5 points；0.05% >=N6 > 0.01%, is 1 point；
0.01% >=N5 > 0.005%, is 0.5 point；0.005% >=N5, is 0 point；
(2) being added by six index score of described each sample point soil environment, respectively obtaining total score is N, determines its soil environment
Corrosion class, its opinion rating is as follows:
N=N1+N2+N3+N4+N5+N6,15 ＜ N are 4 grades；10 ＜ N≤15 are 3 grades；5 ＜ N≤10 are 2 grades；N≤5 are 1
Level.
3. according to the power transmission and transformation earthing material soil environment corrosivity integrated evaluating method described in claim 2, it is characterised in that described
It is high salt district that power transmission and transformation earthing material buries region underground.
4. according to the power transmission and transformation earthing material soil environment corrosivity integrated evaluating method described in claim 2, it is characterised in that described
Power transmission and transformation earthing material is carbon steel.
5. according to the power transmission and transformation earthing material soil environment corrosivity integrated evaluating method described in claim 2, it is characterised in that described
Power transmission and transformation earthing material is copper, galvanized steel or copper covered steel.
6. according to the power transmission and transformation earthing material soil environment corrosivity integrated evaluating method described in claim 4, it is characterised in that described
Carbon steel composition be by percentage to the quality carbon 0.08-0.15, silicon 0.17-0.37, manganese 0.40-0.7, phosphorus less than 0.035, sulfur
0.035, chromium 0.3-0.6, molybdenum 0.25-0.35, nickel less than 0.3, copper is less than 0.3 and vanadium 0.15-0.3.
7. according to the power transmission and transformation earthing material soil environment corrosivity integrated evaluating method described in claim 2, it is characterised in that defeated
Power transformation earthing material is buried arda sampling point underground and is at least 3, and depth selection is consistent with the earthing material depth of burying, rounds body region
In each sample point total score peak as this region power transmission and transformation earth work soil environment corrosive grade scoring value.
8. according to the power transmission and transformation earthing material soil environment corrosivity integrated evaluating method described in claim 2, it is characterised in that use
Chloride ion content N6 is quickly detected in BioVision test kit field, and the range of linearity of detection is 20-120 nanomole Cl-/ hole, inspection
Surveying the limit is 0.4 mM.
9. according to the power transmission and transformation earthing material soil environment corrosivity integrated evaluating method described in claim 2, it is characterised in that use
Tester for water ratio quickly detects moisture N4, uses portable soil conductivity measuring instrument measure electrical conductivity and calculate soil
Resistivity N1, uses pH reagent paper to measure soil pH value N2, and uses conductance method Quick testing instrument quickly to detect salinity N5.
10. it is used for measuring the power transmission and transformation corrosive smart machine of earthing material soil environment, is characterised by, including power module, number
According to acquisition module, MCU control module, LCD MODULE and five parts of voice playing module.
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