CN1074785A - A kind of chemical electric resistance reducing grounding method - Google Patents
A kind of chemical electric resistance reducing grounding method Download PDFInfo
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- CN1074785A CN1074785A CN 93102452 CN93102452A CN1074785A CN 1074785 A CN1074785 A CN 1074785A CN 93102452 CN93102452 CN 93102452 CN 93102452 A CN93102452 A CN 93102452A CN 1074785 A CN1074785 A CN 1074785A
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- sulphite
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Abstract
The present invention relates to a kind of chemical electric resistance reducing grounding method, purpose is to overcome problem such as low-temperature construction inconvenience in the prior art.It is initator that used acrylamide chemical resistance-reducing agent has adopted copper sulphate and sulphite, thus low to metal anodes oxidize and corrosivity, reactivity is high, curing rate is fast.Simultaneously, because initiator amount is few, packing, transportation, storage and constructing operation have been simplified.The present invention has stronger thermal adaptability, also satisfies construction requirement at low temperatures, is one of method that reduces at present earth resistance.
Description
The present invention relates to a kind of earthing method that reduces earth resistance.
Use chemistry to reduce the method for earth resistance, decapacitation makes outside the effective reduction of grounding resistance, and can also keep resistance reducing effect for a long time.This method is in when construction, and earth electrode is fixed in the hole of digging in advance or ditch, injects the aqueous solution of chemical resistance-reducing agent then, treat that it solidifies after, backfill soil and compacting get final product.Used chemical resistance-reducing agent is to make the aqueous solution with monomer, cross linking agent, electrolyte, adds initator before using, and through several minutes generation chemical reactions, can form moisture hardening resin gel.
In " prescription of long-lasting grounding resistance reducing agent and the research of etching characteristic thereof " literary composition of the 6th phase of " high voltage technique " nineteen eighty-two, the prescription and the construction method of some resistance reducing agents disclosed, wherein the acrylic amide resistance reducing agent has obtained since 1980 using widely.But because this resistance reducing agent is formed initiator system by ammonium persulfate and triethanolamine, its reactivity is low, and reaction temperature requires high.When temperature below 20 ℃, especially below 0 ℃ the time, the reaction time is quite long, resistance reducing agent aqueous solution setting time reached more than 2-3 hour, even incoagulable phenomenon takes place.This situation not only influences speed of application, and chemicals such as what is more important acrylamide run off serious, and environment and animals and plants are polluted and poison.Usually the way of taking is to increase initiator amount or use hot water, and the former metal electrode is had big corrosiveness, thereby consumption can not be too high because ammonium persulfate is a strong oxidizer; The latter obviously brings inconvenience to construction.Simultaneously, ammonium persulfate character is stable inadequately, belongs to dangerous material, and storage, transportation condition are just carved, and causes fear and trouble for production and user.
The Japan clear 58-57874 of special permission communique discloses a kind of resistance and has reduced method, and used chemical resistance-reducing agent is an acrylic amide, just constitutes initiator system with hydrogen peroxide and formaldehyde sodium sulfoxylate., hydrogen peroxide is identical substantially with persulfate character, although the inventor advises the aqueous hydrogen peroxide solution that working concentration is lower, but still belongs to dangerous material.In addition, its reactivity is still not high, can not satisfy the low-temperature construction requirement.
The objective of the invention is to seek a kind of initiator system that does not use strong oxidizer, and make the setting rate of the resistance reducing agent aqueous solution also satisfy construction requirement at low temperatures, promptly in 2-3 minute, solidify.
Main points of the present invention are as follows:
1, a kind of chemical electric resistance reducing grounding method is made into the aqueous solution with monomer, cross linking agent, initator, electrolyte earlier, then this solution is injected earth electrode and forms gel on every side, it is characterized in that the component of this solution and weight percent concentration thereof are as follows:
Monomer: acrylamides 3-7%
Cross linking agent: but the bisacrylamide class monomer 0.05-2% of water-soluble interlinkage
Electrolyte 5-15%
Initator: copper sulphate (oxidant) 0.0002-0.1%
Sulphite (reducing agent) 0.0001-0.1%
2, the acrylamides consumption for a long time, formed gel strength height, but conductivity descends.But the bisacrylamide class monomer consumption of water-soluble interlinkage for a long time, and gel becomes fragile.Copper sulphate and sulphite constitute initiator system, when its addition for a long time, gel-forming speed is accelerated.Therefore, the preferable addition (weight percent concentration) of aqueous composition is as follows in the said method:
Acrylamides 4-5%
But the bisacrylamide class monomer 0.1-0.5% of water-soluble interlinkage
Electrolyte 10-13%
Copper sulphate 0.002-0.02%
Sulphite 0.002-0.01%
3, the chemical resistance-reducing agent of the present invention's use generally is packaged in the sulphite component in the polybag separately and deposits when practical application, and other component is made into the aqueous solution and is packaged in the Plastic Drum.During construction, by institute's expense sulphite is added in the solution at the scene, stir rapidly, injection has fixed around the earth electrode immediately then, can form the gel layer that is wrapped on the earth electrode.
4, in the said method:
(1) used acrylamides can be selected acrylamide or Methacrylamide etc. for use;
(2) but the bisacrylamide class monomer of used water-soluble interlinkage can be selected N, N '-methylene-bisacrylamide for use;
(3) used electrolyte can be selected one or two or more kinds of sodium chloride, sodium sulphate, ammonium sulfate etc. for use;
(4) used sulphite is sodium bisulfite or sodium sulfite.
5, can also add in acrylic acid and its esters and methacrylic acid and its esters monomer one or two or more kinds in the resistance reducing agent aqueous solution, its weight percent concentration is 0.01-1%, in order to increase the viscosity of resistance reducing agent gel, overcomes dry and cracked.When relatively constructed in the area of arid, consumption was more.General occasion can be selected for use about 0.05%.
In addition,, and copper sulphate is arranged in the residual impurity of acrylamide monomer, when in the scope that its content is requiring, can not need other adding because copper sulphate is few as the consumption of initiator system constituent.
The chemical resistance-reducing agent that the present invention uses, its initiator amount greatly reduces than ammonium persulfate and triethanolamine system, thereby can reduce cost.This system does not contain strong oxidizer, and safety, reliable is even also can satisfy construction requirement in the time of-15 ℃.Compared with prior art, the present invention has stronger thermal adaptability, has made things convenient for the earth work construction.In addition, formed gel has excellent conducting performance (p=10
-1Ohm-meter), coefficient of permeability is low by (10
-8Cel), little (0.0008 gram/year centimetre of the corrosivity to earth electrode (ordinary carbon steel)
2), earth electrode can reach 20 years useful life.
Embodiment one:
Be made into the aqueous solution by following raw material and consumption thereof:
Material name parts by weight percentage by weight (%)
Acrylamide 54
N.N'-methylene-bisacrylamide 0.5 0.4
PAA 0.05 0.04
α-Jia Jibingxisuan sodium 0.03 0.008
Sodium chloride 15 12.4
Copper sulphate 0.003 0.0025
Water 100 82.93
Respectively get 100 these solution of gram and put into 8 beakers.Beaker is divided into four groups, puts into 5 ℃, 0 ℃ ,-7 ℃ ,-15 ℃ thermostatic container constant temperature 1 hour.Then, carry out the mensuration of sodium bisulfite consumption and setting time relation.Its setting time begins for adding sodium bisulfite, time till the solidification phenomenon occurs to the aqueous solution.It the results are shown in following table:
Embodiment two:
Be made into 25 kg of water solution by following raw material and consumption thereof, wherein sodium bisulfite wouldn't add.
Material name parts by weight percentage by weight (%)
Acrylamide 5 4.25
N.N'-methylene-bisacrylamide 0.5 0.4
Sodium chloride 12 10.2
Copper sulphate 0.003 0.0026
Sodium bisulfite 0.1 0.085
Water 100 85
This solution is placed on temperature is freezing 10 hours of-4 ℃ job site.
2.5 meters of earth electrodes that 4 * 50 millimeters angle steel are made are connected with lead-in wire, put into the horizontal grounding ditch that digs in advance then.Bottom width is 0.15 meter under the ground connection ditch, 1 meter of ditch depth.
When beginning construction adds sodium bisulfite in the aqueous solution of being prepared, and stirs rapidly 0.5 minute, waters immediately then to be filled in around the earth electrode.This aqueous solution solidified in about 1 minute.Backfill soil, and compacting.Surveying its resistance value is 17 Europe.
Adopt identical earth electrode and earthing mode, in identical place construction, but do not add resistance reducing agent, its grounding resistance is 57 Europe.So preceding method (using resistance reducing agent) resistance-reducing efficiency is 3.35 times.
Embodiment three:
Connect following component and amount ratio and be made into 300 milliliters of mixed aqueous solutions, be divided into three parts.
The material name parts by weight
Acrylamide 5
N.N '-methylene-bisacrylamide 0.5
Sodium chloride 12
Water 100
Use ammonium persulfate and triethanolamine, hydrogen peroxide and sodium sulfoxylate formaldehyde, copper sulphate and three kinds of initiator systems of sodium bisulfite to compare then, its result is as follows:
Claims (7)
1, a kind of chemical electric resistance reducing grounding method is made into the aqueous solution with monomer, cross linking agent, initator, electrolyte earlier, then this solution is injected earth electrode and forms gel on every side, it is characterized in that the component of this solution and weight percent concentration thereof are as follows:
Monomer: acrylamides 3-7%
Cross linking agent: but the bisacrylamide class monomer 0.05-2% of water-soluble interlinkage
Electrolyte 5-15%
Initator: copper sulphate (oxidant) 0.0002-0.1%
Sulphite (reducing agent) 0.0001-0.1%
2, method according to claim 1 is characterized in that component and weight percent concentration thereof that this solution is preferable are as follows:
Acrylamides 4-5%
But the bisacrylamide class monomer 0.1-0.5% of water-soluble interlinkage
Electrolyte 10-13%
Copper sulphate 0.002-0.02%
Sulphite 0.002-0.01%
3, method according to claim 1 and 2 is characterized in that and can be made into the aqueous solution to other component except that sulphite earlier, when being about to inject around the earth electrode, sulphite being added stir evenly again.
4, method according to claim 1 and 2, in the aqueous solution that it is characterized in that being prepared:
(1) acrylamides is acrylamide or Methacrylamide;
(2) but the bisacrylamide class monomer of water-soluble interlinkage is N.N '-methylene-bisacrylamide;
(3) electrolyte is one or two or more kinds of sodium chloride, sodium sulphate, ammonium sulfate;
(4) sulphite is sodium bisulfite or sodium sulfite.
5, method according to claim 1 and 2 can also add one or two or more kinds of acrylic acid and its esters, methacrylic acid and its esters in the aqueous solution that it is characterized in that being prepared, its weight percent concentration is 0.01-1%.
6, method according to claim 5 is characterized in that described acrylic acid and basic salt are PAA.
7, method according to claim 5 is characterized in that described methacrylic acid and its esters are α-Jia Jibingxisuan sodium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93102452 CN1074785A (en) | 1993-03-10 | 1993-03-10 | A kind of chemical electric resistance reducing grounding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93102452 CN1074785A (en) | 1993-03-10 | 1993-03-10 | A kind of chemical electric resistance reducing grounding method |
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| Publication Number | Publication Date |
|---|---|
| CN1074785A true CN1074785A (en) | 1993-07-28 |
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|---|---|---|---|
| CN 93102452 Pending CN1074785A (en) | 1993-03-10 | 1993-03-10 | A kind of chemical electric resistance reducing grounding method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0796357A4 (en) * | 1994-11-30 | 1998-02-25 | Patrick G Haglin | Hydrophilic anode corrosion control system |
| CN104356293A (en) * | 2014-10-24 | 2015-02-18 | 广西电网公司电力科学研究院 | Formula of grounding resistance reducing agent for mountainous rock and blasting construction method |
| CN105529114A (en) * | 2016-01-29 | 2016-04-27 | 常州创索新材料科技有限公司 | Preparing method of microorganism composite resistance reducing material |
| CN106876002A (en) * | 2017-03-03 | 2017-06-20 | 北京兴天通电讯科技有限公司 | It is a kind of from conductivity type macromolecular scaffold friction reducer and its production method |
| CN111355043A (en) * | 2020-03-12 | 2020-06-30 | 北京捷安通达科贸有限公司 | Method for manufacturing low-resistance high-capacity electrolyte material |
-
1993
- 1993-03-10 CN CN 93102452 patent/CN1074785A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0796357A4 (en) * | 1994-11-30 | 1998-02-25 | Patrick G Haglin | Hydrophilic anode corrosion control system |
| CN104356293A (en) * | 2014-10-24 | 2015-02-18 | 广西电网公司电力科学研究院 | Formula of grounding resistance reducing agent for mountainous rock and blasting construction method |
| CN104356293B (en) * | 2014-10-24 | 2016-11-30 | 广西电网公司电力科学研究院 | A kind of grounding resistance-reducing agent prescription for mountain area rock and blasting construction method |
| CN105529114A (en) * | 2016-01-29 | 2016-04-27 | 常州创索新材料科技有限公司 | Preparing method of microorganism composite resistance reducing material |
| CN106876002A (en) * | 2017-03-03 | 2017-06-20 | 北京兴天通电讯科技有限公司 | It is a kind of from conductivity type macromolecular scaffold friction reducer and its production method |
| CN106876002B (en) * | 2017-03-03 | 2019-04-05 | 北京兴天通电讯科技有限公司 | A kind of self-conductive type macromolecular scaffold friction reducer and its production method |
| CN111355043A (en) * | 2020-03-12 | 2020-06-30 | 北京捷安通达科贸有限公司 | Method for manufacturing low-resistance high-capacity electrolyte material |
| CN111355043B (en) * | 2020-03-12 | 2021-08-24 | 北京捷安通达科贸有限公司 | Method for manufacturing low-resistance high-capacity electrolyte material |
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