PC Steel Bar Complete Induction Heating Equipment

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Product Description:

 

Application Scope

Steel Bar for Pre-stressed Concrete

Production and processing of PC steel bar (Steel Bar for Pre-stressed Concrete), quenching and tempering heat treatment of metal wire.

 

Function Structure

      PC steel bar production line is complete automatic control: several sets of medium frequency/super audio frequency power supply accomplish pre heating, heating, quenching and tempering of steel bar online. Realize synchronization control of production line by several sets of inverters driving the mechanism.

     There are totally four sets of heating power supply of PC steel bar production line, the power and frequency of which are designed to be: 600kW/8kHz, 200kW/30kHz, 200kW/50kHz, 300kW/8kHz. The power supply adopts parallel IGBT induction heating power supply. It is just because of online heating that there’re strict requirements concerning working status and synchronization control of the power supply.

      The parallel IGBT induction heating power supply adopts AC-DC-AC variable frequency power supply structure. The rectifier of the power supply adopts 3-phase thyristor rectifying or diode and IGBT chopper mode. The inverter adopts high voltage large power IGBT module and large power fast recovery diode to form inverter power unit. The resonant tank circuit adopts parallel resonance.

      The whole unit of equipment is composed of four sets of induction heating equipment, water cooling system, console, automatic control system and mechanism system. 

product picture

感应加热设备 金属热处理 动态无功补偿 PC钢棒 高频焊机 高频开关电源 感应加热设备 金属热处理 动态无功补偿 PC钢棒 高频焊机 高频开关电源

 

 Technical features

Excellent heating power supply design

1.   Power supply cabinet and heating tank circuit adopt independent design with compact structure and small size which is convenient for site layout.

2.  The heating inductor is characterized by high heating efficiency of whole line and stable heating technics by optimization design.

           3.The power supply selects DC chopper mode to ensure the grid side      power coefficient≥0.92 and a relative lower harmonic content.

           4.Adopt      CPLD full digital control system, automatic fixed angle, high precision of      phase-lock and wide scope of phase-lock. Perfect protection function, reliable      working and low failure rate.

           5.High      standard power supply electromagnetism compatibility design and closed      cabinet design to meet the strict requirements at site.

 

Ø   perfect automatic control of whole line

1. Adopt Siemens S7-300 PLC and colorful touch screen to form whole line automatic control center, which is flexible and high cost performance.

2. Having speed-power automatic matching function, which can realize full scope automatic control to different PC steel bar specification and heating speed.

3. Adopt Siemens for transducer (or specified by the user) and US Raytek for pyrometer.

4. Friendly HMI and fault diagnosis system, which is convenient for operation and maintenance. 

     



感应加热设备 金属热处理 动态无功补偿 PC钢棒 高频焊机 高频开关电源

感应加热设备 金属热处理 动态无功补偿 PC钢棒 高频焊机 高频开关电源

Main Technical Parameter


               Model               AC input              Power coefficient                  Rated DC voltage                Rated DC current               Frequency scope   Heating mode
                GZP-600/8                3AC380V
50/60Hz
               

Thyristor rectifying

0.92
                500V                1200A                6-
10 kHz
               Pre-heating
               

IGBT chopper

0.95
                GCYP-200/30k                3AC380V
50/60Hz
               

Thyristor rectifying

0.86
                450V                450A                25~
30 kHz
              heating
               

IGBT chopper

0.95
                GCYP-200/50k                3AC380V
50/60Hz
               

Thyristor rectifying

0.86
                450V                450A                40~
50 kHz
             Quenching 
   

IGBT chopper

0.95
                GZP-300/8                3AC380V
50/60Hz
   

Thyristor rectifying

0.92
                500V                600A                6-
8 kHz
               Tempering
             

IGBT chopper

0.95


Can be customized as per user’s grid and heat treatment technics. 


Operation parameter

Steel No. 30MnSi

               Specification                7.1 mm                9.0mm                10.7mm                12.6mm
              Linear speed                60~110m/min                40~100m/min                30~90m/min                20~60m/min
               Quenching temperature                860℃~960℃                860℃~960℃                860℃~960℃                860℃~960℃
               

Tempering

Temperature 
                360℃~460℃                360℃~460℃                360℃~460℃                360℃~460℃
              Power consumption per ton                ≤375kW.h /T                ≤370kW.h /T                ≤370kW.h /T                ≤370kW.h /T
                Tensile strength                >1420Mpa                >1420Mpa                >1420Mpa                >1420Mpa
              Elongation                >5%                >5%                >5%                >5%

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Q:What is the difference between industrial furnace masonry and ordinary masonry?
Of course, the difference is like the difference between a hog cap and a 100 story building. See the industrial furnace manual.
Q:What's the role of anchor bricks in industrial furnaces?
The wall of an industrial furnace or flue is mainly composed of an inner lining layer, a heat insulating layer and an outer wall layer. The lining is a refractory brick, and the outer wall is an ordinary sintered brick.
Q:What is the difference in structure between industrial furnace and boiler?
From the way: industrial furnace (electricity, natural gas, gas, induction heating is considered electricity), boilers (coal, all kinds of hot exhaust gas, a variety of gas, seemingly less electricity).
Q:What is the difference between industrial furnaces and boilers?
Industrial kilns and industrial furnaces are collectively referred to as industrial furnaces. Industrial furnaces mainly refer to devices that heat materials by combustion reactions.
Q:What is industrial furnace masonry?
Before masonry construction, the pre process and parts that may affect the quality of masonry work shall be re tested,masonry construction shall be carried out according to the datum central line and the datum elevation.
Q:Why does the burner of industrial furnace burn occasionally?
The flameout protection system is made up of burner controller, electromagnetic valve and flame detector, and the flame detection mode is mainly based on the two forms of ultraviolet detection and electrode detection. By utilizing the electric conductivity of the flame, the circuit path of the combustion process generates a weak current, and when the signal amplifier is amplified, the flame is induced to exist, and the small power burner adopts the detection mode more, and is economical and practical.
Q:How many kinds of industrial electric furnaces are there?
Electric furnace is divided into four categories: resistance furnace, induction furnace, arc furnace and special electric furnace according to the different ways of electric heating.
Q:What are the combustion equipments used in industrial boilers?
Main auxiliary equipment for general boilers:1. domestic appliances 2. civilian gas boiler 3. industrial gas furnace.
Q:How to use industrial furnace equipment?
If it is water cooling furnace door, but also to ensure the smooth flow of pipes, winter pipes are not frozen. When the boiler is in a limited position, the interlocking device for cutting off the power supply shall be provided when the furnace is in and out, and the number of broken wires in the pitch of the steel wire shall not exceed 10%, and the counterweight of the furnace door shall be reliably hung.
Q:Selection of heat preservation material for industrial furnace
Ceramic fiber blanket can be used.Ceramic fiber blanket color white, regular size, set fire, heat insulation, insulation in one. Free from any binding agent.

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