Blogs/News/PSAs

The harsh environments submarine encounters include extreme hot and cold temperatures and extensive pressure cycling. Water is an excellent conductor of sound (much better than air), and submarines can detect and track comparatively noisy surface ships from long distances. Modern submarines are built with an emphasis on stealth and more tiny interconnect systems.

The correct installation method of corn oil extraction process:

Before installing the equipment, the newly purchased corn oil extraction machine should be cleaned thoroughly. Remove the spindle and the cage, and polish the outer surface, inner surface and screw feeder of the screw with the abrasive cloth. All lubrication parts shall be lubricated with grease, and the type and brand of the lubricating oil added in the gearbox shall conform to the requirements in the specification. After polishing and cleaning, the equipment of corn germ oil press machine must be arranged according to the original position when installed. Because the arrangement position and order of the circular arrangement have a great relationship with oil extraction performance. After the circular platen is installed, press it with the pressing nut. After the above treatment, the corn oil press equipment can be fixed on the foundation with anchor bolts. When the equipment of corn germ oil extraction process is installed, the motor's belt pulley should be aligned with the belt pulley of the oil extraction machine. They should be in the moderate position and correct rotation direction. The belt tension should be adjusted properly.   

The process of extracting corn oil from corn oil press machine

1. Water embellish

According to the difference between the endosperm and the germ, make the corn husk and germ absorb water. The germ is highly absorbent and expands after absorbing water. The germ increases toughness and elasticity and does not break when breaking grits or crushing grits, making it easy to break away from the embryo. After absorbing water, corn husk is easy to peel, and at the same time, it is helpful to separate from the embryo and reduce the phenomenon of the intercalated or intercalated embryo. This improves the embryo rate and the purity of the germ.

2. Peel and break grits

After the corn is moistened with water, the grits are then peeled and broken. During the operation, the degree of dermal breakage should be strictly controlled to ensure that the germ does not carry the skin and the skin does not carry the germ. Grits are broken into several lobes by a horizontal three-section sand roller. The germs are separated from the endosperm in large amounts as the corn is broken.

The proportion of grits and embryos was different. The proportion of grits was 1.30 ~ 1.35 grams/cm³, and the proportion of embryos was 0.78 ~ 0.99 grams/cm³. The separation effect can be effectively controlled by adjusting the height of the grits and the baffle. The extracted germ is then sent to a windscreen to extract the husk from the embryo to improve the purity of the embryo.

3. Embryo screening

The selected embryos still contain grits. We can put them into the grinding machine to press the embryos, and then screen them with the horizontal.

4. Purification

The grits, powder, chaff and other impurities in the germ should be screened out with a vibrating screen before being pressed, so as to improve the purity of the germ as much as possible.

5. Dry

Generally, the water content of corn germ is 11 ~ 15%, and its suitable water content is less than 4%. Therefore, it is necessary to conduct thermal drying on the extracted germ, so that the water content of corn germ can reach less than 4% before being pressed into the machine. The drying methods used are fire drying, steaming wok and mechanical drying.

6. Press

Most of the corn oil press equipment used are type 95 and type 200. With its own baking equipment, it guarantees the extraction of the germ.

RO membrane technology is a water purification technology that uses a semipermeable membrane to remove ions, molecules, and larger particles from drinking water.

In reverse osmosis, an applied pressure is used to overcome osmotic pressure, a colligative property, that is driven by chemical potential differences of the solvent, a thermodynamic parameter.

The reverse osmosis membrane technology can remove many types of dissolved and suspended species from water, including bacteria, and is used in both industrial processes and the production of potable water. The result is that the solute is retained on the pressurized side of the membrane and the pure solvent is allowed to pass to the other side. To be "selective", this membrane should not allow large molecules or ions through the pores (holes) but should allow smaller components of the solution (such as solvent molecules) to pass freely.

Advantages of reverse osmosis

1. Removes nonionic impurities and dissoved solids (i.e.organics,silica,bacteria)
2. Reduction of hazardous chemical storage and handling associated with ion exchange
3. Reductes loading on ion exchange systems:

• Extends run lengths
• Extends resin life
• Reductes operating costs

Application range of reverse osmosis

• • Desalination
  • Dehydration
  • Concentration
  • Remove COD/BOD

Attractive food packaging introduction:
Custom food package, with the shiny and colorful outlook, easy to carry, make this kind of package attractive, not to mention the insider foods, you will enjoy the delicious food everywhere if you want anytime.

Type: Attractive food package

Size: Customized

Printing color: CMYK, 4,6 or more color available

Print: offset/Silk screen/UV print

Material/Paper stock: Flexible package material paper

Insert option: Customized

Surface finishing: UV, gloss, matt/gloss laminate, hot stamping, hot-stamping, Embossing, Debossing ,UV Coating, etc.

Advantage: automatic machine made,High Quality ,Eco-Friendly Material, all meets export standard

Uses: electronics, hardware, foodstuffs, arts and crafts, cosmetics, health products, sporting goods, stationery, etc.

Package: with PE bag pack in corrugated master shipping carton box and standard pallet

Design: Your own design and OEM welcome

Design software: AI, PDF, PSD, CAD, ARD, Pro, 3D Max

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).

Exothermic welding, also called hot melt welding, fire-clay welding, thermite welding and explosion welding, is a high-heat principle 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 products require 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 copper clad steel groundingshould 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.

We can provide you various exothermic welding supplies, RFQ today!

Industrial Energy Management: Wireless Industrial Energy Monitoring System

DeviceBit has the ability to offer professional and complete wireless industrial energy monitoring solutions for energy services companies or facility managers. Our fully comprehensive enterprise-wide solution makes it easy to monitor and measure energy use and boost facility performance within tightening budgets.

DeviceBit can help you  make it easy to monitor your energy by sending accurate real-time electricity data into the cloud applications, lower the cost of measurement and verification and grow your service revenue.

In addition to lowering the cost of obtaining accurate and complete data, we can also help you avoid the field operational penalties of working with portable equipment, deliver robust technology that can support your ongoing analytics services, boost performance and make projects more profitable.

Our free App for your Android or iOS Apple devices will enable you be able to remotely and effortlessly monitor all of your equipment 24 hours a day, 7 days a week and receive alerts when any of your equipment readings fall outside the normal range. A variety of energy monitors can be used to gather power data throughout your facilities measure, collect, and deliver essential data from key distribution points across your entire electrical network. Our energy monitoring software brings intelligent analytics and visualization to your energy data.

DeviceBit has developed many business energy monitoring devices, which can be widely applied in different scenarios for industrial service to realize smart industrial energy management. We can offer professional industrial energy management system, such as dedicated commercial energy management system / commercial energy monitoring system; We can also offer customized energy management systems for commercial buildings, including wireless power monitor and cloud-based energy monitoring platform.

Performance and characteristics of BEST grounding module:

The low-resistance grounding module is a non-metallic material-based grounding body composed of non-metallic minerals with good conductivity and chemical stability, metal ground rods, electrolytes and humectants.

Ground Module performance and characteristics

1. The contact resistance is greatly reduced.

The main material of the grounding module is similar to the physical structure of the soil, and can be integrated with the soil, so that the effective contact area between the grounding body and the soil is increased by many times compared with that between the traditional metal grounding body and soil, which has increased the flow area of the grounding body itself and greatly reduced contact resistance of the grounding body to the soil.

2. The copper clad steel groundingresistance is stable

The grounding module has strong moisture absorption and moisturizing ability, ensuring that the grounding module can effectively play the conductive function. At the same time, the conductive characteristics of the grounding body are not affected by the weather changes such as dry humidity, high and low humidity. Therefore, it can provide a stable low grounding resistance.

3. Reduce ground potential counterattack

The non-metallic material in the grounding module forms a low-resistance region with a gentle change between the metal and the soil with a large difference in electrical resistivity. When encountering a large current surge, the potential gradient of the grounding body and the grounding wire can be lowered to lower the step voltage and the contact voltage so as to reduce the probability of counterattack of the ground potential.

4. Long service life

The main material of the grounding module is similar to the physical structure of the soil, and can be integrated with the soil, so that the effective contact area between the grounding body and the soil is increased by many times compared with that between the traditional metal grounding body and soil, which has increased the flow area of the grounding body itself and greatly reduced contact resistance of the grounding body to the soil.

5. Simple construction and installation

Compared with the traditional metal grounding device, the construction work is greatly reduced.

Ground module use range:

1. Working grounding, safe grounding and lightning protection for power plants, substations, switching stations, high-voltage transmission lines, electrified railways, telecommunications, mobile communication base stations, microwave relay stations, ground satellite receiving stations and radar stations;
2. Working grounding and protective grounding for valuable precision instruments, computer room equipment, postal and telecommunications program control equipment, radio and television equipment, and electronic medical equipment;
3. Lightning protection of various high-rise buildings, tall structures, scenic ancient buildings and tall memorial towers;
4. Lightning protection of oil pipelines, oil and gas tanks, and inflammable and explosive material warehouses.

Ground Module usage method:

1. The low-resistance grounding module can be vertically embedded or horizontally embedded, and the  embedded depth should not be less than 0.6 m, generally 0.8- 1.0 m.
2. When several modules are embedded in parallel, the module spacing should not be less than 4.0 meters. If the conditions are not allowed, it can be appropriately reduced. At the same time, the value of the module utilization coefficient should be reduced when the amount of module is calculated.
3. When the module pole cores are connected in parallel or connected to the ground wire, they must be welded, with the welding length no less than 100mm.
4. The welding slag should be removed at the weld, coated with anti-corrosive conductive paint or wrapped with HD-JZ high-efficiency swelling resistance-reducing agent.
5. During backfilling, it should be sprinkled with water in an appropriate amount, tamped in layers and watered again after backfilling. Meanwhile, the grounding resistance should be measured after the module is fully hygroscopically absorbed (72 hours).

Ground Module Specifications:

Precautions；

1. The storage module should maintain a certain humidity to avoid high temperature, dryness and explosion;
2. External force should be avoided to damage modules during transportation and installation;
3. In cold areas, the module should be embedded below the frozen layer.

Usage calculation

According to the soil resistivity of the grounding network soil layer, the amount of HD-GO grounding module is calculated by the following formula; horizontal embedding, single module grounding resistance: total grounding resistance after parallel connection.

In the formula

ρ- soil resistivity (Ω.m)

a and b- length and width of the grounding module (m)

Rj- single module grounding resistance (Ω)

Rnj- total grounding resistance (Ω)

n- number of grounding modules

η- module adjustment factor, generally 0.6 -0.9

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.

The world is changing fast. Each day, hundreds of new factories are built for producing large quantities of commodities to meet the expanding international market, especially in Southeast Asia countries as they have more labor available. For effective enter and exit control, most factories turn to turnstile gates for help. Turnstile gates are born for security control as they can block the way by revolving arms or swinging doors. They will only unlock as people get their identification confirmed.

Safe and Efficient

1. Control the flow of workers during rush hours in case of any disorder or trampling.

2. Unauthorized visitors will be prevented from entering the factory or building site for the sake of safety.

3. Turnstiles with fingerprint or face recognition modules will boost the efficiency of employee attendance management.

1. ESD (electrostatic sensitive device) detector can be integrated into the turnstile gates for the special need of electronics factories.

All for Security

A variety of turnstile gates can be applied to factories, workshops or construction sites for different levels of security needs, such as construction site turnstiles and industrial turnstiles. Full height turnstile gates integrated with biometric identification technology are highly recommended for the highest level of safety precaution. For the workshop entry, standard tripod turnstile, swing turnstile or flap turnstiles combined with other access control and management modules are sufficient for daily needs.

Customization is Not a Problem

Wherever you are, whatever you need, ZOJE will always provide you the best necessary security solutions for your factory or building site thanks to its powerful customized turnstile gates.

Cabinet material, dimension, controller, motor as well as other components can be customized according to your detailed requirements.

ZOJE have established a long-term relationship with thousands of clients in different countries, most of which are located in Southeast Asia. We are looking forward to our cooperation in a win-win situation. We are doing our best to raise our profile around the world.

What is side loader garbage truck

Side Loader Garbage Truck is loaded from the side, also called Hanging bucket garbage truck, self-loading and unloading type garbage truck, is mainly used in various municipal and large factory and mine departments to carry various kinds of garbage, and can also transport ash, sand, stone, soil, and other bulk building materials. either manual side loader garbage truck, or with the assistance of a joystick-controlled robotic arm with a claw, used to automatically lift and tip wheeled bins into the truck's hopper.

Side loader garbage trucks advantages

An Automated Side Loader only needs one operator, where a traditional rear load garbage truck may require two or three people, and has the additional advantage of reducing on the job injuries due to repetitive heavy lifting. Due to these advantages, ASL's have become more popular than the traditional manual collection. Typically an Automated Side Loader uses standardized wheeled carts compatible with the truck's automated lift.

1. The hydraulic system is installed reasonably, and a reliable fixing device is arranged to ensure that there is no leakage for a long time so that it is reliable, convenient to maintain and prolong the service life;

2. The garbage can be made of high-quality steel plate in WISCO, and stainless steel plate can be installed on the bottom of the box to ensure smoothness during unloading;

3. The bottom of the box can be installed according to the seasonal temperature of the area to ensure the normal operation of the vehicle;

4. Install the pusher and scraper device in the sealed garbage box to ensure that the discharging is clean

Over the weekend, LL COOL J returned to his hometown in Queens to host the closing ceremonies of the 15th Annual Jump & Ball Community Camp. LL was greeted by the more than 200 youth who participated in the month long camp and residents of the neighborhood where he grew up.

Launched in 2005 by LL COOL J, Jump & Ball is a free and fun-filled camp every Saturday & Sunday during the month of August for hundreds of kids from Southeast Queens. The program was developed as an opportunity for the kids in the community to not only learn the game of basketball but also learn team building and leadership skills critical to life off the court.

LL has always been an avid philanthropist involved in numerous causes including literacy for kids as well as music and arts programs in schools. Celebrating its 15th Anniversary this year, LL’s charity “Jump & Ball” – which takes place every August in his hometown of Queens, New York – aims to give back to his local community by offering a five-week athletic and team building program dedicated to bringing wholesome fun to young people.

Guests enjoyed live music courtesy of Rock the Bells, LL COOL J’s curated Sirius XM channel featuring classic hip hop, a special performance by the Harlem Globetrotters, free food, free back to school haircuts and more.

For more information about event visit the website https://www.llcooljjumpandball.com

Heat resistant silicone glue is a polymer of isoprene made from latex collected from rubber trees. It has good wear resistance, high elasticity, breaking strength and elongation. It is easy to age in air, viscous when heated, easy to expand and dissolve in mineral oil or gasoline, alkali-resistant but not strong acid-resistant.

What are the advantages of heat resistant silicone glue?
1. High and low-temperature impact resistance;
3. Extremely low odor; the releases in the process are harmless to the human body;
4. No primer is needed for bonding with various substrates.
5. Excellent heat resistance, ozone resistance, and chemical erosion resistance.
6. Electrical insulation performance;
7. The single-component system is easy to use.

What are the application areas of heat resistant silicone glue?
Mainly used for sealing daily necessities, such as fresh-keeping boxes, lunch boxes and other products; food machinery, such as sealing rings of sealing machines; electronic appliances, such as pressure cookers, rice cookers; in addition, it can also be widely used in hardware, communication equipment, sanitary ware, baby products, security and environmental protection, sports equipment, printing, and mechanical manufacturing industry.

Let me introduce you zoomlion ZLJ5430THBB 52x-6rz concrete pump truck, a 52 meter concrete pump truck.

Machine performance of 52 meter Concrete Pump Truck

 The concrete pump chassis of zoomlion ZLJ5430THBB 52x-6rz adopts noble German Benz chassis.

 Intelligent and safe distribution control: set up a global benchmark for intelligent control of long-arm pump truck.

 Based on the top K - CIFA tronic ® intelligent control technology, it is developed in line with China's actual use habits and working condition.

 Intelligent and safe distribution control.

Arm top of 52 meter Concrete Pump Truck

Arm top is composed of arm frame, rotary table, rotary mechanism, underframe and supporting leg.

 Large distribution range: the arm frame is a 6-section RZ arm frame with a maximum radius of 48m and a maximum height of 52m.

 X leg structure is adopted, which greatly expands the performance of the pump truck in the construction site.

 MBIT multi-arm intelligent coordination technology: to solve the problems such as the uncoordinated action of multi-arm frame and rotary motion, intelligent control is adopted to allocate the hydraulic oil flow. It realizes the synchronous coordination of multi - node arm, reduces the vibration and impact when the arm frame works, and makes the operation more simple and convenient.

 Intelligent buffer technology of arm frame rotation

 Flexible control is adopted to start, rotate and stop the arm frame, which can slow down the impact vibration when the arm frame and rotary start and stop, making the whole machine more stable, reliable and safe.

 Good stability: it adopts the rotary reducer and slewing support with world advanced technology. The electro-hydraulic proportional reversing control valve can make the rotation of the cloth arm and stretch more smoothly.

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

installation earth electrode 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 copper clad steel grounding.

Chemical Ground Rod 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.

The copper-clad strand wire is shaped like a cable ccs, 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 Stranded Wire 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 Copper Clad Rod

Cable Welding Capsule New

3.Long life

The copper plating of single-stranded copper-clad round steel (copperweld steel) 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.

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.

We are one of the leading copperweld copper clad steel wire suppliers, RFQ today!

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