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:Should the industrial furnace shell cool down?
Normally, the furnace shell temperature of an industrial furnace is below 50 degrees, so there is no need to cool down.
Q:What's the role of anchor bricks in industrial furnaces?
Anchorage brick is a new type of anchor brick relates to an industrial furnace, in particular to anchor brick of an industrial furnace roof, including column hanging end and the anchor structure, opened in the anchor on the surface of the spacing of the grooves in the anchor on at least one surface is arranged along the length direction ribs is provided with ribs, the ribs of the reinforcement and anchorage tension, tensile and flexural strength was obviously improved, the stress generated in the groove at the bar at the barrier can not continue to transfer, so the anchor brick of this kind of structure is not easy to break.
Q:What is industrial furnace masonry?
Pre construction and recording shall be carried out on complex and important parts of industrial furnaces,masonry of all kinds of masonry shall be made with staggered joint masonry.
Q:Brief introduction to repair of industrial furnace
The working condition of industrial furnace is very bad. It is affected by high temperature, slag erosion and burden wear. Therefore, its working condition changes quickly and its service life is short.
Q:What are the combustion equipments used in industrial boilers?
The boiler is an energy conversion equipment. The energy input to the boiler has the chemical energy and the electric energy in the fuel. The boiler outputs steam with certain heat energy and high temperature water.
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 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 are the advantages of a vacuum furnace?
The utility model can completely eliminate the oxidation and decarburization of the workpiece surface in the heating process, and can obtain clean surfaces without deterioration layers. For cutting tools that grind only one side of grinding (such as twist grinding, the surface of the groove surface is exposed to the blade directly), the cutting performance is greatly improved.
Q:How many kinds of industrial electric furnaces are there?
This series of electric furnace is made of super light refractory fiber. The electric stove and the temperature control cabinet matching use, the controller may automatically or the manual control electric stove temperature, may press the user request to provide the computer table or the computer control, does the multielement temperature measurement, guarantees the product quality. This series of electric furnaces are periodical operation type electric furnaces.
Q:What are the companies in the world that are currently engaged in metallurgical furnaces?
There are many kinds of furnaces in metallurgical industry,colored and black,smelting and heat treatment are also included.

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