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PC Steel Bar Complete Induction Heating Equipment

PC Steel Bar Complete Induction Heating Equipment

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.


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商品描述

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
     
1. 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
     
2. 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.
     
3. 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.
     
4. The whole unit of equipment is composed of four sets of induction heating equipment, water cooling system, console, automatic control system and mechanism system.







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.
   
 
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 perfor
     
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.


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



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%



Can be customized according to user’s grid; General design, can be designed as per user’s technics; For more information, please contact EECTECH









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