WO2016169474A1 - Rembourrage composite pour connexion à la terre et réduction de la résistance pour sol rouge acide et son utilisation - Google Patents

Rembourrage composite pour connexion à la terre et réduction de la résistance pour sol rouge acide et son utilisation Download PDF

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Publication number
WO2016169474A1
WO2016169474A1 PCT/CN2016/079727 CN2016079727W WO2016169474A1 WO 2016169474 A1 WO2016169474 A1 WO 2016169474A1 CN 2016079727 W CN2016079727 W CN 2016079727W WO 2016169474 A1 WO2016169474 A1 WO 2016169474A1
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WO
WIPO (PCT)
Prior art keywords
bentonite
ground connection
composite filler
padding
resistance
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Application number
PCT/CN2016/079727
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English (en)
Chinese (zh)
Inventor
裴锋
刘欣
田旭
贾蕗路
饶斌斌
周友武
张宇
邓静伟
尹桂来
赵康文
毛荣军
曹凤香
Original Assignee
国家电网公司
国网江西省电力科学研究院
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Application filed by 国家电网公司, 国网江西省电力科学研究院 filed Critical 国家电网公司
Priority to AU2016251185A priority Critical patent/AU2016251185B2/en
Publication of WO2016169474A1 publication Critical patent/WO2016169474A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin

Definitions

  • the invention belongs to the field of electric power grounding, and particularly relates to a grounding resistance reducing composite filler for acid red soil and application thereof.
  • Red soil is mainly distributed in the low hilly areas south of the Yangtze River in China, including: most of Jiangxi and Hunan provinces, southeast of Fujian and Hubei, Guangdong, northern Fujian and Guizhou, Sichuan, Zhejiang, Anhui, Jiangsu, etc. Part of it, as well as southern China and other places, is characterized by the lack of alkali metals and alkaline earth metals and is rich in iron and aluminum oxides, which are acid red.
  • the soil In the acid red soil area, due to the large amount of salt-based ions leaching, the soil has low conductivity and the resistivity is generally above 100 ohm ⁇ m. According to the general rule, the metal corrosion rate in this soil should be very low. But in fact, many metal materials are in the middle of corrosion, and some even reach a strong corrosion level, of which carbon steel material corrosion is the most obvious.
  • the corrosion of the grounding grid metal material in the soil is mainly electrochemical corrosion.
  • chloride ion and sulfate ion are the main ions causing corrosion damage of the metal material.
  • many existing grounding grid resistance reducing agents or reducing resistance materials have added chlorine.
  • Salts and sulfates, such as sodium chloride, calcium chloride, magnesium chloride, sodium sulfate, ammonium sulfate, etc. while improving conductivity, significantly accelerate the corrosion of metal materials in the grounding grid, which will seriously endanger the safe operation of power grid equipment. .
  • Bentonite is a non-metallic mineral with montmorillonite as the main mineral component.
  • the interlayer cations are easily exchanged and have a large ion exchange capacity.
  • the bentonite is divided according to the proportion of exchangeable cations in the bentonite layer. It is sodium bentonite, calcium bentonite, magnesium bentonite and aluminum (hydrogen) based bentonite, and has excellent properties such as swelling, adsorption, cation exchange, suspension and dispersibility.
  • Bentonite has a lower electrical resistivity because bentonite contains a large amount of metal oxides of potassium, sodium, calcium, magnesium, iron and titanium. When it meets water, it can ionize a large amount of metal ions. Contains a large amount of semiconductor elements.
  • bentonite since bentonite has adsorption properties and ion exchange properties, it can adsorb free ions in water after exposure to water. Therefore, when the bentonite is sufficiently absorbed, the bentonite contains a large amount of ions inside, and the conductivity is good.
  • the bentonite is usually organically modified by intercalation, and the conductive mechanism after the modification is mainly based on electronic conduction.
  • the inorganic bentonite is hydrophilic and oleophobic, and the macromolecular organic matter is introduced into the interlayer to modify it, and the hydrophilic inorganic bentonite is changed into a lipophilic organic bentonite to reduce the ion exchange capacity.
  • acidification, ultrasonic dispersion, heating reaction and the like are often used, which greatly increases the production cost.
  • the original bentonite price is only a few hundred yuan / 1000kg, and the organically modified bentonite reaches 10,000 yuan / 1000kg.
  • the modified bentonite is used for the resistance reduction of the grounding grid, and its economical efficiency is very low, which is the most important limiting factor for its difficulty in popularization and application.
  • the present invention provides a grounding resistance reducing composite filler for acid red soil and application thereof, and the composite filler provided can inhibit acid corrosion of soil, improve protection of grounded metal materials, and significantly improve electrical conductivity. Sex, with anti-corrosion and resistance reduction.
  • the invention provides a grounding resistance reducing composite filler for acid red soil, characterized in that the filler is made of a raw material comprising the following mass ratio: conductive graphite 15 to 35%, calcium bentonite 30 to 60%, sodium base Bentonite 15 to 35%, sodium carbonate 2 to 5%, aluminum powder 1 to 3%, zinc powder 1 to 3%.
  • the calcium bentonite has a particle size of not less than 200 mesh.
  • the sodium bentonite has a particle size of not less than 200 mesh.
  • the conductive graphite has a particle size of not less than 100 mesh; the sodium carbonate has a particle size of not less than 100 mesh; the aluminum powder has a particle size of not less than 100 mesh; and the zinc fine has a particle size of not Less than 100 mesh.
  • the conductive graphite has a mass ratio of 15 to 24%.
  • the calcium-based bentonite has a mass ratio of 30 to 45%.
  • the sodium bentonite has a mass ratio of 15 to 20%.
  • the filler is weakly basic.
  • the filler has a pH of 9.
  • the invention also provides the use of a grounding resistance reducing composite filler for acid red soil, which encloses a mixture of clean water and the filler on a grounding material.
  • the volume ratio of filler to fresh water in the mixture is 2:1.
  • the invention provides a grounding resistance reducing composite filler for acid red soil, which is prepared from raw materials including the following mass ratio: conductive graphite 15 to 35%, calcium bentonite 30 to 60%, sodium bentonite 15 to 35%, carbonic acid Sodium 2 to 5%, aluminum powder 1 to 3%, and zinc powder 1 to 3%.
  • the invention fully considers the applicable soil environment.
  • the system composed of sodium carbonate and bentonite has a strong buffering effect on the pH value reduction, thereby inhibiting the acid corrosion of the soil.
  • the addition of aluminum powder and zinc powder improves the electrical conductivity of the whole system.
  • acidic and oxidizing substances in the soil invade and react with aluminum powder and zinc powder, acidic substances and oxidizing substances are consumed, aluminum and zinc. It is converted into conductive ions and still maintains good electrical conductivity.
  • the acid red soil grounding resistance composite filler provided by the invention is weakly alkaline, can significantly reduce the corrosion of the acidic substance, and has a protective effect on the grounded metal material; the present invention adopts the current conventional product, and the particle size of the defined component is determined.
  • the filler is simple to prepare and convenient to use, and is beneficial to the promotion and application of the product.
  • the reduced-resistance composite filler is mixed with clean water to form a viscous paste wrapped on the grounding material, thereby increasing the effective cross section with the grounding body, so that the composite filler is in close contact with the grounding body, thereby improving
  • the reliability of bonding with the surrounding soil basically eliminates the contact resistance, and at the same time, due to the anti-corrosion function of the filler itself, the grounding body does not generate contact resistance due to corrosion, thereby achieving the effects of reducing resistance and anti-corrosion.
  • FIG. 1 is a schematic view showing changes in water content of different fillers with time according to an embodiment of the present invention.
  • the invention provides a grounding resistance reducing composite filler for acid red soil, characterized in that the filler is made of a raw material comprising the following mass ratio: conductive graphite 15 to 35%, calcium bentonite 30 to 60%, sodium base Bentonite 15 to 35%, sodium carbonate 2 to 5%, aluminum powder 1 to 3%, zinc powder 1 to 3%.
  • the filler provided by the invention can inhibit the acid corrosion of the soil, improve the protection effect on the grounded metal material, significantly improve the conductivity, and has the functions of anti-corrosion and resistance reduction.
  • the filler provided by the present invention comprises 15 to 35% of conductive graphite, preferably 15 to 24% by mass.
  • the content of the conductive graphite in the embodiment of the present application may be specifically 24% or 26%.
  • the particle size of the conductive graphite is preferably not less than 100 mesh; the present invention has no particular requirement for the source of the conductive graphite, and conductive graphite well known to those skilled in the art may be used.
  • the filler provided by the present invention comprises 30 to 60% of calcium-based bentonite, preferably 30 to 45% by mass.
  • the content of the calcium-based bentonite in the embodiment of the present application may be specifically 45% or 55%.
  • the higher content ratio of the calcium-based bentonite in a limited amount range is selected to achieve the antiseptic effect on the acid red soil region with less rainfall.
  • the calcium-based bentonite preferably has a particle size of not less than 200 mesh, and the present invention may be a calcium-based bentonite well known to those skilled in the art.
  • the filler provided by the present invention comprises, by mass ratio, 15 to 35% of sodium bentonite, preferably 20 to 35%.
  • the particle size of the sodium bentonite is preferably not less than 200 mesh; the present invention has no particular requirement for the source of the sodium bentonite, and sodium bentonite known to those skilled in the art may be used.
  • the filler provided by the present invention comprises, in mass ratio, 2 to 5% of sodium carbonate.
  • the particle size of the sodium carbonate is preferably not less than 100 mesh.
  • the present invention employs sodium carbonate which is well known to those skilled in the art.
  • the filler provided by the present invention comprises, by mass ratio, 1 to 3% of aluminum powder, and the particle size of the aluminum powder is preferably not less than 100 mesh.
  • the present invention has no special requirement for the source of the aluminum powder, and aluminum powder which is well known to those skilled in the art can be used.
  • the filler provided by the present invention comprises, by mass ratio, 1 to 3% of zinc powder, and the particle size of the zinc powder is preferably not less than 100 mesh.
  • the present invention has no particular requirement for the source of the zinc powder, and zinc powder which is well known to those skilled in the art can be used.
  • the amount of the sodium carbonate, the aluminum powder and the zinc powder are selected to be higher than the amount of the zinc powder, and the antiseptic effect on the acidic red soil region is achieved.
  • the filler is preferably weakly basic, and more preferably has a pH of 9.
  • the preparation method of the composite filler is not particularly limited, and the technology in the field is adopted. A technical solution for the preparation of the composition well known to the person is sufficient.
  • the raw materials of the mass ratio described in the above aspects are uniformly mixed in a dry environment.
  • the present invention packages the composite filler obtained by the above technical solution to achieve the purpose of sealed storage and transportation.
  • the present invention has no special requirements for the packaging method, and the packaging method well known to those skilled in the art is adopted. In the embodiment of the present invention, it is specifically a barrel or a bag.
  • the invention provides the application of the composite material obtained by the above technical solution, in particular, when the on-site construction, the mixture of the clean water and the filler is wrapped on the grounding material.
  • the mass ratio of the filler to the water in the mixture is preferably 2:1, and a viscous paste mixture is wrapped around the grounding material to increase the effective cross section of the grounding body.
  • the invention provides a grounding resistance reducing composite filler for acid red soil, which is prepared from raw materials including the following mass ratio: conductive graphite 15 to 35%, calcium bentonite 30 to 60%, sodium bentonite 15 to 35%, carbonic acid Sodium 2 to 5%, aluminum powder 1 to 3%, and zinc powder 1 to 3%.
  • the invention fully considers the applicable soil environment.
  • the system composed of sodium carbonate and bentonite has a strong buffering effect on the pH value reduction, thereby inhibiting the acid corrosion of the soil.
  • the addition of aluminum powder and zinc powder improves the electrical conductivity of the whole system.
  • acidic and oxidizing substances in the soil invade and react with aluminum powder and zinc powder, acidic substances and oxidizing substances are consumed, aluminum and zinc. It is converted into conductive ions and still maintains good electrical conductivity.
  • the acid red soil grounding resistance composite filler provided by the invention is weakly alkaline, can significantly reduce the corrosion of the acidic substance, and has a protective effect on the grounded metal material; the present invention adopts the current conventional product, and the particle size of the defined component is determined.
  • the filler is simple to prepare and convenient to use, and is beneficial to the promotion and application of the product.
  • the reduced-resistance composite filler is mixed with clean water to form a viscous paste wrapped on the grounding material, thereby increasing the effective cross section with the grounding body, so that the composite filler is in close contact with the grounding body, thereby improving
  • the reliability of bonding with the surrounding soil basically eliminates the contact resistance, and at the same time, due to the anti-corrosion function of the filler itself, the grounding body does not generate contact resistance due to corrosion, thereby achieving the effects of reducing resistance and anti-corrosion.
  • grounding resistance reducing composite filler for acidic soil provided by the present invention and its application are described in detail below with reference to the embodiments, but they are not to be construed as limiting the scope of the present invention.
  • the acid-resistant red soil grounding resistance-reducing composite filler is made of a raw material including the following mass ratio;
  • Aluminum powder 1%;
  • Zinc powder 1%.
  • the components of the ratio are uniformly mixed in a dry environment.
  • the resulting reduced-resistance composite filler and clean water are prepared in a 2:1 ratio to form a viscous paste wrapped on the grounding material.
  • the ratio increases the content of calcium bentonite.
  • the acid red soil grounding resistance reducing composite filler is made of the following mass ratio raw materials
  • Zinc powder 3%.
  • the components of the ratio are uniformly mixed in a dry environment.
  • the resulting reduced-resistance composite filler and clean water are prepared in a 2:1 ratio to form a viscous paste wrapped on the grounding material.
  • the reduced-resistance composite filler prepared according to the embodiment 1 and the reduced-resistance composite filler prepared in the second embodiment and 100 g of acid red soil were respectively taken up to a saturated state, and then placed at room temperature, and electronic water was used every other day.
  • the analyzer tests its water content, and the test results are shown in Figure 1. It can be seen from Fig. 1 that the water-reducing composite filler obtained in the first embodiment and the second embodiment has a significant decrease in water content with time, and the water content of the acid red soil is greatly reduced.
  • the reduced-resistance composite filler prepared according to the embodiment 1 and the reduced-resistance composite filler prepared in the second embodiment and 100 g of acid red soil were respectively taken up to a saturated state and placed in the same room temperature environment. After one month of storage, it was naturally air-dried and cured; it was pressed into a 3 mm thick sheet and subjected to a resistivity test by a four-probe tester. The test results are shown in Table 1.
  • Example 1 Acid red soil 1.52 ⁇ m 1.23 ⁇ m 150.56 ⁇ m
  • Example 1 and Example 2 The corrosion-reducing composite fillers prepared in Example 1 and Example 2 and the acid red soil were respectively buried in different grounding materials according to conventional techniques in the art, and the corrosion weight loss rate of different grounding materials was carried out after 12 months of burying. Test, test results are shown in Table 2.

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  • Prevention Of Electric Corrosion (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Road Paving Structures (AREA)

Abstract

L'invention concerne un rembourrage composite pour connexion à la terre et réduction de la résistance pour sol rouge acide et son utilisation. Le rembourrage composite est préparé à partir d'une matière première comprenant les éléments suivants en rapport massique : de 15 à 35 % de graphite conducteur, de 30 à 60 % de bentonite de calcium, de 15 à 35 % de bentonite de sodium, de 2 à 5 % de carbonate de sodium, de 1 à 3 % d'une poudre d'aluminium et de 1 à 3 % d'une poudre de zinc. Les divers constituants dans les proportions indiquées sont mélangés uniformément dans un environnement de séchage, et le rembourrage est emballé dans des tonneaux ou des sacs et stocké et transporté dans un mode d'étanchéité. Au cours de la construction d'un site, le rembourrage composite pour réduction de la résistance et de l'eau douce sont mélangés en une pâte visqueuse en un rapport volumique de 2:1 pour couvrir un matériau de connexion à la terre, augmentant la section transversale efficace du corps de connexion à la terre ; d'une part, le remplissage composite et le corps de connexion à la terre sont en contact intime, et d'autre part, le rembourrage composite et le sol périphérique sont liés de manière fiable, ce qui permet d'éliminer la résistance de contact. En même temps, le corps de connexion à la terre ne génère pas de résistance de contact provoquée par la corrosion grâce à la fonction de résistance à la corrosion du rembourrage lui-même de manière à atteindre les objectifs de réduction de la résistance et de résistance à la corrosion.
PCT/CN2016/079727 2015-04-23 2016-04-20 Rembourrage composite pour connexion à la terre et réduction de la résistance pour sol rouge acide et son utilisation WO2016169474A1 (fr)

Priority Applications (1)

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AU2016251185A AU2016251185B2 (en) 2015-04-23 2016-04-20 Ground connection and resistance reduction composite padding for acid red soil and use thereof

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CN201510195573.9 2015-04-23
CN201510195573.9A CN104810631A (zh) 2015-04-23 2015-04-23 一种酸性红壤用接地降阻复合填料

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CN104810631A (zh) * 2015-04-23 2015-07-29 国家电网公司 一种酸性红壤用接地降阻复合填料
CN105390179A (zh) * 2015-10-28 2016-03-09 国网吉林省电力有限公司检修公司 一种降阻泥及其制备方法
CN105957577B (zh) * 2016-05-05 2017-10-17 国网江西省电力科学研究院 一种接地用钙基膨润土基降阻剂
CN111326272B (zh) * 2020-03-27 2021-04-13 河南四达电力设备股份有限公司 一种制备缓释型石墨降阻膏的方法
CN112676330A (zh) * 2020-12-28 2021-04-20 上海格林曼环境技术有限公司 用于污染场地原位热脱附修复加热井的填料及其制备方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6050871A (ja) * 1983-08-31 1985-03-20 岡野　喜正 接地抵抗低減剤
CN1030666A (zh) * 1988-03-28 1989-01-25 傅辅成 固体无机化学接地降阻剂
JPS6433861A (en) * 1987-07-28 1989-02-03 Denki Kagaku Kogyo Kk Grounding resistance reducing agent
CN1472750A (zh) * 2002-08-01 2004-02-04 寇承平 物理性接地降阻剂
CN101552385A (zh) * 2009-05-13 2009-10-07 北京林业大学 一种石墨铝镁合金接地体材料及其制造方法
CN104810631A (zh) * 2015-04-23 2015-07-29 国家电网公司 一种酸性红壤用接地降阻复合填料

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1068957C (zh) * 1998-09-30 2001-07-25 李黔鲁 防雷接地稀土降阻剂
CN101719393B (zh) * 2008-12-30 2012-01-04 中国瑞林工程技术有限公司 一种生物菌接地降阻剂
CN104449560B (zh) * 2014-11-18 2016-09-28 国网河南省电力公司漯河供电公司 一种基于环保长效性的接地装置防腐剂及制备方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6050871A (ja) * 1983-08-31 1985-03-20 岡野　喜正 接地抵抗低減剤
JPS6433861A (en) * 1987-07-28 1989-02-03 Denki Kagaku Kogyo Kk Grounding resistance reducing agent
CN1030666A (zh) * 1988-03-28 1989-01-25 傅辅成 固体无机化学接地降阻剂
CN1472750A (zh) * 2002-08-01 2004-02-04 寇承平 物理性接地降阻剂
CN101552385A (zh) * 2009-05-13 2009-10-07 北京林业大学 一种石墨铝镁合金接地体材料及其制造方法
CN104810631A (zh) * 2015-04-23 2015-07-29 国家电网公司 一种酸性红壤用接地降阻复合填料

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