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Copper clad steel ground rod wire function: High-voltage ground wire is used for line and transformer construction. It prevents electrostatic induction shock or misclosure of nearby charged body to ensure safety. Due to poor insulation performance or humid environment, there will be a certain static electricity in their cases of household electrical appliances. In order to avoid accidents, a wire can be connected to the metal shell of the electrical appliances, and the other end of the wire can be connected to the earth. Once the electrical appliances leak, the ground wire will bring static electricity into the earth and release it.

Ground wire is the line directly connecting the earth, also known as the safety loop line. When dangerous, it directly transfers the high voltage to the earth, which is a lifeline.

High-voltage ground wire structure: Portable high-voltage grounding wire consists of insulating lever, conductor clamp, short-circuit line, grounding wire, grounding terminal, confluence clamp and grounding clamp.

High-voltage ground wire manufacturing process: excellent production process - wire clamp, grounding clamp is formed by high-quality aluminum alloy die casting; operating rod is made of epoxy resin color tube, which has good insulation performance, high strength, light weight, bright color and smooth appearance.

Ground soft copper wire is made of multiple strands of high-quality soft copper wire and covered with soft, high-temperature transparent insulation layer, which can prevent wear and tear of grounding copper wire in use. It can meet the fatigue test requirements of copper wire and ensure the safety of operators in operation.

COPPER-CLAD STEEL GROUNDING CONDUCTORS

Copper-clad copperweld steel grounding material is a new material developed by Ningbo Zhenhai Beisuda Petrochemical Equipment Co.,Ltd. to replace pure copper. Copper-clad copperweld steel grounding conductors has the following advantages:

With high strength

With low price

High corrosion resistance

High electrical conductivity of copper

APPLICATIONS OF CCS GROUNDING GROUND CONDUCTORS

In recent years, the  copper clad steel ground rod has been widely applied to UHV lines, petrochemicals, nuclear power, high-speed rail, especially key projects. Copper-clad steel: A material in which the surface of a steel core is uniformly coated with copper, including copper-clad steel bars (for vertical grounding only), copper-clad steel flat steel, and copper-clad steel wire (including copper-clad steel round wire and copper-clad steel stranded wire).

Copper Clad Steel Grounding Conductor Advantage:

1. It has strong corrosion resistance and will not be disjointed, warped or cracked. The corrosion of the grounding body of the grounding grid is reduced, which improves the overall operational safety of the equipment.

2. Copper-clad steel grounding material - grounding conductor has thick copper layer, good electrical conductivity and stable electrical performance; copper-clad steel ground rod and copper-clad steel round copper layer can reach 0.5mm and above, and copper-clad steel strand conductivity can be 40. %the above.

3. The copper layer and the steel material reach the molecular type combination, and the ground rod will not break when it penetrates the soil;

4. The copper-coated steel round bar is used as the grounding material, which has high efficiency of reducing the resistance. For the design of the high-resistance section, the length of the grounding body is reduced by 1/3, so that the excavation amount of the earthwork is greatly reduced;

5. When copper-coated steel flat steel is used as a horizontal grounding body, the grounding material used is greatly reduced and the cost is saved because the material itself has a large contact area with the ground and a high electrical conductivity.

6. The design uses the exothermic welding process, which is very suitable for the needs of field construction, greatly improving the work efficiency and effectively shortening the construction period.

Ningbo Zhenhai Beisuda Petrochemical Equipment Co.,Ltd located in Ningbo, Zhejiang, it is a professional enterprice, who focus on R&D, production, sales of copper clad earth rod. We sincerely invite and welcome people

Exothermic Welding

Exothermic welding, also called hot melt welding, fire-clay welding, thermite welding and explosion welding, is a kind of exothermic welding products that utilizes the redox reaction between metals, the operation of which is simple, easy to learn, safe and efficient, and it has significant results in the production of high quality permanent welded joints between homogeneous metals and metals of different materials and is now well known to the public, becoming more popular in more and more architectural designs, and widely required to replace the connection method using conventional metal fixtures.

Exothermic welding requires high-quality graphite to form a cavity mold with a certain shape, such as line style (butt), T-joint (three-way), cross-type joint (four-way) and so on. The mold can be used multiple times, effectively saving costs.

Exothermic Welding Advantanges:

1. Good electrical conductivity: the current-carrying capacity of the welded joint surface is almost the same as that of the metal conductor, and the electrical conductivity is strong.

Experiments have shown that the the change rate of DC resistance before and after welding is close to zero, which is incomparable with any traditional connection mode.

2. Long and durable life: due to the high temperature fusion between the metal conductors during exothermic welding, an integrated permanent joint is formed, which is very strong and difficult to break and damage.
3. Strong corrosion resistance: the material of the welded point is mainly copper, and the corrosion resistance is almost the same as that of copper.
4. The operation is convenient and simple with no need for professionals but can be performed only after pepole are simply trained by professionals.
5. The requirement for operating environment is low, and no external power source or heat source is required for welding.

Operation flow of hot-melt welding

1. First, the mold and the welded conductor joint should be cleaned, and then the welded conductor should be fixed at the center of the mold cavity.
2. Close the mold and steadily place a metal protective gasket on the bottom of the mold furnace.
3. Pour in the exothermic welding flux, and evenly spread the starting powder on the surface of the flux and place it in an environmentally friendly starting powder.
4. Cover the mold, expose a part of the pyrophoric wrap at the mold opening, and then ignite the starting powder with an igniter.
5. After the hot-melt flux is ignited, a high temperature reaction occurs in the mold.
6. After the reaction is completed and cooled, the mold is opened and the welded conductor has been permanently connected.

Welding For Grounding Precautions Flammable and explosive articles shall not be placed within 2 meters of the site during construction operation. Unrelated personnel shall not stay and operators must wear heat insulation gloves and related protective equipment.

Ningbo Zhenhai Beisuda Petrochemical Equipment Co.,Ltd located in Ningbo, Zhejiang, it is a professional enterprice, who focus on R&D, production, sales of copper clad ground wire. We sincerely invite and welcome people from all around the world to invest and create more values together.

Chemical Ground Electrode System

Performance characteristics and working principle of Chemical Ground Electrode:

1. Chemical ground electrode
2. Existing soil
3. Special filler
4. Ions diffuse around
5. Expand the conductive range of the soil

Chemical ground rod (chemical grounding rod) is a new type of grounding system suitable for all kinds of places with high grounding requirements and difficult grounding engineering.

The chemial grounding electrode system consists of advanced alloy compounds, with a copper tube on the outside to ensure maximum conductivity and long service life. The filling material inside the conductor contains special ionic compounds, which can absorb moisture in the air adequately. Active ions can be effectively released into the soil through the deliquescence, and interact with the moisture in the soil and air to further promote the external slow release and drag reduction of conductors, and to maintain the long-term stability of the resistance value. Compounds in conductors are gradually combined in colloidal transparency over time.

By utilizing the conductivity of the colloidal compound, the entire system can be ion-exchanged for a long time, thus forming an ideal electrolytic ion grounding system. After the slow-release filler in the conductor is embedded, the grounding resistance will gradually decrease, reaching a stable value within six months to one year, and the embedded slow-release process can last for several years. The main connecting parts of the ion grounding electrode are hot-melt welded, which has overcome other connection methods and easy connection loosening.

The connecting wire is a copper clad steel copperweld stranded wire with a section of 95 mm2 and a length of 3 m and is crimped to the grounding terminal/copper lug to facilitate connection with the grounding grid.

Chemical Ground Electrode Specification and models

The grounding electrode of BEISUDA COMPANY electrolytic ion fully meets the requirements of grounding protection equipment such as UL, NEC, ANS, lEC, BC and other international standards.

Chemical Ground Electrode application range

Lightning protection and grounding works for petrochemicals, oil storage, power plants, substations, communication base stations, airports and network computer rooms, etc.

Ningbo Zhenhai Beisuda Petrochemical Equipment Co.,Ltd located in Ningbo, Zhejiang, it is a professional enterprice, who focus on R&D, production, sales of copper clad ground wire. We sincerely invite and welcome people from all around the world to invest and create more values together.

Copper-clad copperweld steel grounding material is a new material developed by Ningbo Zhenhai Beisuda Petrochemical Equipment Co.,Ltd. to replace pure copper. Copper clad ground wire has the following advantages:

With high strength

With low price

High corrosion resistance

High electrical conductivity of copper

GROUNDING GROUND CONDUCTORS

In recent years, the copper clad steel rod has been widely applied to UHV lines, petrochemicals, nuclear power, high-speed rail, especially key projects. Copper-clad steel: A material in which the surface of a steel core is uniformly coated with copper, including copper-clad steel bars (for vertical grounding only), copper-clad steel flat steel, and copper-clad steel wire (including copper-clad steel round wire and copper-clad steel stranded wire).

Zhejiang, it is a professional enterprice, who focus on production and sales of copper clad steel ground rod. We welcome merchants from all over the world to cooperate with our factory for mutual benefit and win-win, and jointly create a better future. 

Brief Instruction of Copper Clad Steel Stranded Wire

The copper-clad strand wire is shaped like a cable, which is made of a plurality of copper-clad single wires. Because of its multi-stranded properties, the electrical conductivity and tensile strength are relatively good, and the product can be customized to enhance the elongation rate by multiple heat treatment in the production process, which has increased the strength and toughness of the steel compared with the pure copper strand. Moreover, the good electrical conductivity and corrosion resistance of the copper material are maintained due to the principle of the skin effect. Therefore, it is very popular in many fields of lightning protection and grounding, especially in power plants, substations, high-speed rail, subways, electrified railways, large-scale chemical plants, mechanical plants, communication base stations, transportation, computer rooms, highways and military bases.

Copper Clad Steel Cable Characteristics

1.High conductivity (up to 70% and above)

The copper-clad strand wire produced by our company generally has a conductivity of 30%-70%, and more than 70% can be customized according to customer requirements.

2.High tensile strength

The multi-stranded copper-clad strand wire has high tensile strength and can be made into copper-clad steel strand wire with high electrical conductivity and high tensile strength after being enhanced by special treatment process to be suitable for special use occasions.

CCS-Stranded Cable

Cable Welding Capsule New

3.Long life

The copper plating of single-stranded copper-clad round steel (cable copperweld) of multi-stranded copper-clad strand is thick, the excellent production process makes copper layer tightly combined and bent 180-360 degrees without cracking and its life is long and can be more than 30 years.

4.Low cost

The characteristics of high conductivity and corrosion resistance have greatly reduced the number of grounding conductors used in grounding projects, which can significantly save costs and achieve outstanding economic benefits.

5.Convenient construction and transportation

The single length of the copper-clad copperweld strand can be up to 100 meters, because the 100-meter package or the hundred-meter cable can be transported more easily. The welding between the grounding grids during the construction is recommended to use the exothermic welding series products produced by our company. There are different shapes of molds for exothermic welding, so that different permanent joints can be randomly welded. The construction operation is simple and easy to learn, and the various conductors of the grounding grid are welded together to become a true maintenance-free device.

Specification and modles:

Note: tinned copper-clad strands and PVC insulated copper-clad strands can be customized according to customer requirements.

Zhejiang, it is a professional enterprice, who focus on production and sales of copper clad steel ground rod. We welcome merchants from all over the world to cooperate with our factory for mutual benefit and win-win, and jointly create a better future. 

0.8 Series  Copper Coated Stainless Steel Wire

Origin of new material development

0.8mm series copper-clad round wire is a new type of material developed by our Company to replace pure copper. Because it has the advantages of high strength, low price, high corrosion resistance and high conductivity of copper, and meanwhile its comprehensive performance is high and its cost is more economical than pure copper grounding device, it has been widely used in UHV lines, petrochemical industry, nuclear power and high-speed railway, especially in key projects in recent years.

Copper-clad steel:

The material in which the surface of a steel core is uniformly coated with copper includes copper-clad steel bars (for vertical grounding electrode only), copper-clad steel tape, and copper-clad steel wires (including round wires and stranded wires). According to the production process, it can be divided into continuous casting copper-clad steel and electroplating copper-clad steel.

Development of copper-clad steel grounding device

With the increasing voltage level of power lines and the increasing capacity of the system, higher requirements are put forward for the safety and reliability of grounding devices.

The traditional method in foreign countries is to use pure copper as the grounding material, but pure copper is expensive and it is a strategic resource, which is not suitable for being massively used as grounding devices in China. From 1910 to 1955, National Bureau of Standards (NBS) conducted corrosion resistance studies of grounding bodies. 36,500 samples collected at 128 test sites throughout the United States represented 333 metal materials consisting of iron, non-ferrous metals and protective coatings, respectively. The test results show that only steel bars and stainless steel bars with copper plating thickness over 0.5mm can be accepted.

In addition, continue the statistical data of 8 to 30 years and take the test results of 43 copper samples in different soils, 41 of which were calculated, to get the 0.17mm average pitting depth of 30 years. Therefore, some international standards have determined the thickness of copper coating of copper-clad steel material to be at least 0.25 mm. Considering the hard friction during construction, it is suggested that the thickness of copper coating be defined as 0.5-0.8 mm.

In China, copper clad(copperweld) steel materials are widely used in substation grounding grids in areas with high soil resistivity. Because of the characteristics of UHV project, such as high voltage level, large capacity and short power cut window period, combined with the corrosion intensity of groundwater in the area, copper-clad steel grounding devices have been applied in UHV lines and many UHV lines in China use copper-clad steel materials as grounding bodies.

Comparison between copper-clad steel grounding and traditional hot-dip galvanized steel grounding device

1. Corrosion rate comparision
   Annual corrosion rate of grounding materials in some place of Beijing and Tianjin

The test results show that galvanized steel has the most serious corrosion and its corrosion rate is more than 50 times higher than that of pure copper; the corrosion degree of stainless steel is much lower than that of pure copper and copper-clad steel, showing good corrosion resistance; as a copper-steel composite material, the self-corrosion potential of copper-clad steel in soil is basically the same as that of pure copper, and its corrosion rate is the same as that of pure copper; the corrosion rate of the electroplated copper-clad steel with thinner coating is higher than that of the continuous casting copper-clad steel with thicker coating.

2. Analysis and comparison of physical performance in short circuit

If the conductivity of copper were 100% and the conductivity of standard 1020 steel were only 10.8%, the conductivity of copper would be about 10 times that of steel. However, the conductivity of the 30% conductivity copper-clad round wire would be 30%, and the conductivity of the 40% conductivity copper-clad round wire would be 40%, which would be far better than the steel grounding body. Especially under skin effect, the conductivity of copper-plated strands at high frequencies would be much better than that of steel, that is, the conductivity of copper grounding body would be better than that of steel grounding body. The melting point of copper is 1083℃ and the maximum allowable temperature during short circuit is 450℃ ; the melting point of steel is 1510℃ and the maximum allowable temperature during short circuit is 400℃. Therefore, when the grounding body has the same cross section, the copper-clad steel grounding material has better thermal stability.

3. Economic comparison

According to Appendix D of Technical Conditions for Copper-clad Steel for Grounding in Electrical Engineering, the corrosion rates of copper clad steel in different soils are calculated according to the reference values in table. Corrosion rate of pure copper under different soil corrosion grades (mm/a)

The 0.8mm copper plating thickness is enough to meet the requirement of 60 years of service under the grade of III extremely strong corrosion.

The corrosion rate of galvanized steel is nearly 50 times that of copper-clad steel under the same soil conditions, and the grounding body should be overhauled after being used for 3-5 years.

The State Grid has accounted the UHV tower according to the drawings: after the investigation of the market price of material during the construction, the market price of the copper-clad-steel grounding body is calculated at RMB 20 /m, the market price of φ12 galvanized-steel round steel grounding body is calculated at RMB 6 /m and the grounding body laying is calculated according to the grounding construction drawing. During the 30-year whole life cycle, galvanized steel is overhauled every 5 years, of which the cost of material is RMB 20 /m for copper-clad steel and RMB 36/m for galvanized steel, that is, only material cost can be reduced by 80%. Galvanized steel can be overhauled and replaced six times. If the construction cost is RMB 70 /m3 for earthwork and stone works and each base tower is calculated by 23 m3 for excavation, RMB 9660 per base tower will be saved.

Copper-clad steel construction

The horizontal laying of the copper-clad steel grounding device is the same as that of the ordinary galvanized round steel, where only the connection method is changed to hot-melt welding, which has reduced the contact resistance between the joints and is more conducive to the release of lightning current.

Exothermic welding, also known as "aluminum heat welding", is a simple, high-efficiency, high-quality metal joining process that has been mass-produced and used in China in recent years. Exothermic welding uses chemical reaction heat of metal compounds as heat source and through superheated (reduced) molten metal or indirect heating, a certain shape and size of the melted joint is formed in the cavity of the special graphite mould, which meets the engineering requirements, and finally through cooling and condensation, the welding process is realized. At present, exothermic welding has generally replaced the mechanical connection between metals in the past.

Advantages of copper-clad steel

1.It has strong corrosion resistance and will not be disjointed, warped or cracked. The corrosion in the grounding body of the grounding grid is reduced, which has improved the overall operational safety of the equipment;

2. It has good electrical conductivity and stable electrical performance;
3. The copper layer and the steel bar achieve molecular bonding, and the grounding bar will not break down when it penetrates into the soil.
4. The copper-clad-steel grounding material used has high efficiency of reducing the resistance, and the length of the horizontal grounding body is reduced by 1/3 for the design of the high-resistance section, greatly reducing the excavation amount of the earthwork;
5. The design and use of exothermic welding technology is very suitable for the needs of field construction, greatly improving work efficiency and effectively shortening the construction period.

Performance parameters of copper-clad steel wire

Copper layer thickness:0.8mm; tensile strength: greater than 500MPa; copper-clad steel bent 180° without peeling off copper layer.

Specification of 0.8mm series copper-clad round steel: Soft copper-clad round bars are generally packaged in hanks or rolls, 100 meters per roll, easy to transport, suitable for laying of large grounding grids and horizontal grounding lines.

Usage:key projects, large grounding grids and horizontal grounding wires in industries with higher lightning protection requirements, etc.

Note:

1. If the thickness of copper layer is required to be 1 mm, please contact us directly.
2. We undertake custom-made zinc-clad steel ground rod and round steel.

Production method of copper clad steel technical field The invention specifically relates to a production method of copper clad steel.

Background technologycopper clad steel

The conductivity of existing copper clad steel products is not good, far inferior to that of pure copper products. The reason is that the overall product performance is insufficient when copper is coated on steel materials in the process.

Summary of the invention

In view of the above technical problems, the invention provides a production method of copper clad steel.

A copper clad steel production method comprises the following steps:

1. Surface treatment of steel wire;
2. Stripping and wire drawing of the treated steel wire;
3. Straightening and polishing the treated steel wire.
4. Heating the treated steel wire to 300-400 degrees.
5. Melting copper into water in high temperature furnace.
6. The steel wire in step D is coated with copper water in step E and then cold crystallized to form the product.

Preferably, the  copper plated steel wire  surface treatment in step A is a mechanical grinding treatment without water contamination.

The invention provides a production method of copper clad steel. The conductivity of the product obtained by the method is close to that of the pure copper product, the cost is greatly reduced, and the service life is prolonged.

Ningbo Zhenhai Beisuda Petrochemical Equipment Co.,Ltd located in Ningbo, Zhejiang, it is a professional enterprice, who focus on production and sales of copper clad earth rod. We welcome merchants from all over the world to cooperate with our factory for mutual benefit and win-win, and jointly create a better future.

Copper clad ground wire is a new material developed by Ningbo Zhenhai Beisuda Petrochemical Equipment Co.,Ltd. to replace pure copper. Copper-clad copperweld steel copper clad rod has the following advantages:

With high strength

With low price

High corrosion resistance

High electrical conductivity of copper

APPLICATIONS OF CCS GROUNDING GROUND CONDUCTORS

In recent years, the copper coated grounding wire has been widely applied to UHV lines, petrochemicals, nuclear power, high-speed rail, especially key projects. Copper-clad steel: A material in which the surface of a steel core is uniformly coated with copper, including copper-clad steel bars (for vertical grounding only), copper-clad steel flat steel, and copper-clad steel wire (including copper-clad steel round wire and copper-clad steel stranded wire).

What is the copper bonded earth rod?

Product Name: Copper coated copperweld steel ground rod

Production process: electroplating / continuous electroforming

Raw materials: Cold draw high quality mild steel

Product type: one pointed, one flat, two threads (requires with a striker, connector, drill)

Thread production process: mainly consists of two processes: turning before electroplating and rolling after electroplating

Tensile strength: 450-600MPA

Copper layer thickness: more than 0.254mm

Super copper thickness: 0.33-1mm

Why choose our Copper-bonded steel ground rod?

1. Factory history 30 years
2. Export history 10years
3. Quality control
4. Technical skill(copper thickness 0.5mm/0.8mm/1mm)
5. OEM service
6. Free sample

Copper-bonded copperweld steel ground rod advantags:

1. Higher tensile strength than pure copper ground rod, can be as high as 600MPA and above
2. Superior corrosion resistance: underground service life of up to 30-50 years
3. Compared with pure copper ground rod, it has excellent electrical conductivity of copper and saves cost.
4. Compared with traditional galvanized ground rods, the conductivity is higher and the corrosion resistance is stronger.
5. The connection to the grounding grid can be made by exothermic welding, integrated and molded, and the grounding resistance is small, making it a permanent maintenance-free grounding device.

Production reference standard: US UL467, national grid production enterprise standard QDW466-2010, etc.

Copper-bonded copper clad rod application range:

Lightning protection grounding projects in petrochemical plants, oil storage, power plants, substations, communication base stations, airports, network equipment rooms, etc.

Remarks: Copper-bonded copperweld steel copperweld ground rod steel material and copper plating thickness can be customized according to requirements, the company provides OEM service.

Copper-bonded copperweld steel ground rod specification

1. Copper layer 0.254mm

2. Copper layer 0.33-0.5mm

Remark: If you want to earth rod suppliers,please contact us, we off OEM service.

Origin of new material development

0.8mm series copper-clad round wire is a new type of material developed by our Company to replace pure copper. Because it has the advantages of high strength, low price, high corrosion resistance and high conductivity of copper, and meanwhile its comprehensive performance is high and its cost is more economical than pure copper grounding device, it has been widely used in UHV lines, petrochemical industry, nuclear power and high-speed railway, especially in key projects in recent years.

coated ground wire:

The material in which the surface of a steel core is uniformly coated with copper includes copper-clad steel bars (for vertical grounding electrode only), copper-clad steel tape, and copper-clad steel wires (including round wires and stranded wires). According to the production process, it can be divided into continuous casting copper-clad steel and electroplating copper-clad steel.

Development of copper clad steel grounding device

With the increasing voltage level of power lines and the increasing capacity of the system, higher requirements are put forward for the safety and reliability of grounding devices.

The traditional method in foreign countries is to use pure copper as the grounding material, but pure copper is expensive and it is a strategic resource, which is not suitable for being massively used as grounding devices in China. From 1910 to 1955, National Bureau of Standards (NBS) conducted corrosion resistance studies of grounding bodies. 36,500 samples collected at 128 test sites throughout the United States represented 333 metal materials consisting of iron, non-ferrous metals and protective coatings, respectively. The test results show that only steel bars and stainless steel bars with copper plating thickness over 0.5mm can be accepted.

In addition, continue the statistical data of 8 to 30 years and take the test results of 43 copper samples in different soils, 41 of which were calculated, to get the 0.17mm average pitting depth of 30 years. Therefore, some international standards have determined the thickness of copper coating of copper-clad steel material to be at least 0.25 mm. Considering the hard friction during construction, it is suggested that the thickness of copper coating be defined as 0.5-0.8 mm.

In China, copper clad(copperweld) steel materials are widely used in substation grounding grids in areas with high soil resistivity. Because of the characteristics of UHV project, such as high voltage level, large capacity and short power cut window period, combined with the corrosion intensity of groundwater in the area, copper-clad steel grounding devices have been applied in UHV lines and many UHV lines in China use copper-clad steel materials as grounding bodies.

Comparison between copper-clad steel grounding and traditional hot-dip galvanized steel grounding device

1. Corrosion rate comparision

Annual corrosion rate of grounding materials in some place of Beijing and Tianjin

The test results show that galvanized steel has the most serious corrosion and its corrosion rate is more than 50 times higher than that of pure copper; the corrosion degree of stainless steel is much lower than that of pure copper and copper-clad steel, showing good corrosion resistance; as a copper-steel composite material, the self-corrosion potential of copper-clad steel in soil is basically the same as that of pure copper, and its corrosion rate is the same as that of pure copper; the corrosion rate of the electroplated copper-clad steel with thinner coating is higher than that of the continuous casting copper-clad steel with thicker coating.

2. Analysis and comparison of physical performance in short circuit

If the conductivity of copper were 100% and the conductivity of standard 1020 steel were only 10.8%, the conductivity of copper would be about 10 times that of steel. However, the conductivity of the 30% conductivity copper-clad round wire would be 30%, and the conductivity of the 40% conductivity copper-clad round wire would be 40%, which would be far better than the steel grounding body. Especially under skin effect, the conductivity of copper-plated strands at high frequencies would be much better than that of steel, that is, the conductivity of copper grounding body would be better than that of steel grounding body. The melting point of copper is 1083℃ and the maximum allowable temperature during short circuit is 450℃ ; the melting point of steel is 1510℃ and the maximum allowable temperature during short circuit is 400℃. Therefore, when the grounding body has the same cross section, the copper-clad steel grounding material has better thermal stability.

3. Economic comparison

According to Appendix D of Technical Conditions for Copper-clad Steel for Grounding in Electrical Engineering, the corrosion rates of copper clad steel in different soils are calculated according to the reference values in table. Corrosion rate of pure copper under different soil corrosion grades (mm/a)

The 0.8mm copper plating thickness is enough to meet the requirement of 60 years of service under the grade of III extremely strong corrosion.

The corrosion rate of galvanized steel is nearly 50 times that of copper-clad steel under the same soil conditions, and the grounding body should be overhauled after being used for 3-5 years.

The State Grid has accounted the UHV tower according to the drawings: after the investigation of the market price of material during the construction, the market price of the copper-clad-steel grounding body is calculated at RMB 20 /m, the market price of φ12 galvanized-steel round steel grounding body is calculated at RMB 6 /m and the grounding body laying is calculated according to the grounding construction drawing. During the 30-year whole life cycle, galvanized steel is overhauled every 5 years, of which the cost of material is RMB 20 /m for copper-clad steel and RMB 36/m for galvanized steel, that is, only material cost can be reduced by 80%. Galvanized steel can be overhauled and replaced six times. If the construction cost is RMB 70 /m3 for earthwork and stone works and each base tower is calculated by 23 m3 for excavation, RMB 9660 per base tower will be saved.

Copper-clad steel construction

The horizontal laying of the copper-clad steel grounding device is the same as that of the ordinary galvanized round steel, where only the connection method is changed to hot-melt welding, which has reduced the contact resistance between the joints and is more conducive to the release of lightning current.

Exothermic welding, also known as "aluminum heat welding", is a simple, high-efficiency, high-quality metal joining process that has been mass-produced and used in China in recent years. Exothermic welding uses chemical reaction heat of metal compounds as heat source and through superheated (reduced) molten metal or indirect heating, a certain shape and size of the melted joint is formed in the cavity of the special graphite mould, which meets the engineering requirements, and finally through cooling and condensation, the welding process is realized. At present, exothermic welding has generally replaced the mechanical connection between metals in the past.

Advantages of copper-clad steel

1.It has strong corrosion resistance and will not be disjointed, warped or cracked. The corrosion in the grounding body of the grounding grid is reduced, which has improved the overall operational safety of the equipment;

2. It has good electrical conductivity and stable electrical performance;
3. The copper layer and the steel bar achieve molecular bonding, and the grounding bar will not break down when it penetrates into the soil.
4. The copper-clad-steel grounding material used has high efficiency of reducing the resistance, and the length of the horizontal grounding body is reduced by 1/3 for the design of the high-resistance section, greatly reducing the excavation amount of the earthwork;
5. The design and use of exothermic welding technology is very suitable for the needs of field construction, greatly improving work efficiency and effectively shortening the construction period.

Performance parameters of copper-clad steel wire

Copper layer thickness:0.8mm; tensile strength: greater than 500MPa; copper-clad steel bent 180° without peeling off copper layer.

Specification of 0.8mm series copper-clad round steel: Soft copper-clad round bars are generally packaged in hanks or rolls, 100 meters per roll, easy to transport, suitable for laying of large grounding grids and horizontal grounding lines.

Usage:key projects, large grounding grids and horizontal grounding wires in industries with higher lightning protection requirements, etc.

Note:

1. If the thickness of copper layer is required to be 1 mm, please contact us directly.
2. We undertake custom-made zinc-clad steel ground rod and round steel.

Production method of copper clad steel technical field The invention specifically relates to a production method of copper clad steel.

Background technologycopper clad steel

The conductivity of existing copper clad steel products is not good, far inferior to that of pure copper products. The reason is that the overall product performance is insufficient when copper is coated on steel materials in the process.

Summary of the invention

In view of the above technical problems, the invention provides a production method of copper clad steel.

A copper clad steel production method comprises the following steps:

1. Surface treatment of steel wire;
2. Stripping and wire drawing of the treated steel wire;
3. Straightening and polishing the treated steel wire.
4. Heating the treated steel wire to 300-400 degrees.
5. Melting copper into water in high temperature furnace.
6. The steel wire in step D is coated with copper water in step E and then cold crystallized to form the product.

Preferably, the steel wire surface treatment in step A is a mechanical grinding treatment without water contamination.

The invention provides a production method of copper clad steel. The conductivity of the product obtained by the method is close to that of the pure copper product, the cost is greatly reduced, and the service life is prolonged.

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