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Place of Origin: Hebei, China (Mainland)
Brand Name: CNBM Group
Model Number: GGP250-0.3-H
Usage: Pipe seam welding
After-sales Service Provided: Engineers available to service machinery overseas
Frequency: 250~ 300 kHz
welding: induction welding
cooling way: water-water or air-water
maintenance: easy & low cost
color: make as customer requirement
circuit: series circuit
|Packaging Details:||1.Standard export wooden package. 2.Fumigated seaworthy wooden boxes 3.Upper/lower back angles for lifting 4.Mark as customer's requirement 5.Follow customer's packing standard 6.20GP or 40GP container (for reference)|
|Delivery Detail:||20 days|
Power saving more than 30%
Efficiency more than 85%
Stable and continous working;
Full digital control system
China good quality steel pipe seam welding hf welder
The steel pipe seam welding hf welder mainly used for HF welded steel pipe line, it is a typical AC-DC-AC variable frequency structure. Rectifier adopts 3-phase bridge style thyristor phase-control rectifier circuit, DC side adopts inductor, capacitor to compose LC filter which meet the working requirements of voltage type inverter. The voltage type inverter adopts modularization parallel structure to extend power supply power, each inverter module is single phase MOSFET bridge style circuit connected with series resonance tank circuit by H.F. matching transformer. On one hand, the matching transformer realizes power combination and impedance matching; on the other hand it realizes electric isolation of load and power supply. To put effective and swift protection on over-current malfunction of voltage type inverter, our company introduces special and stable over-current protection circuit which guarantees safe and stable running of inverter.
The whole set of solid state H.F. welder comprises of switchgear rectifying cabinet, inverter output cabinet, connecting optical fiber, circulation soft water cooling system, central operator console, mechanical adjustment device, contact welding pole plate and contact pin (contact welding) and etc
2. Circuit structure of steel pipe seam welding H.F. welder
3.Equipment composing and main index
Composition / Model
250kW steel pipe seam HF welder
Switchgear rectifying cabinet
Inverter output cabinet
Central operation console
Connecting optical fiber
Mechanical adjustment device
Air/water cooling system (optional )
Main technical index
Rated DC voltage
Rated DC current
The whole efficiency
Model selection reference
Welding pipe type
Typical welding speed
Steel pipe specification:45-89mm
4.Brief introduction for solid state H.F. welder
Designed with integration of switchgear cabinet and rectifying part, besides achieving switchgear cabinet functions, it also has rectifying control functions of solid state H.F. welders.
Installed line-in switch, line-in current meter, voltage meter (can be switched) and line-in voltage indication lamp.
Installed 3-phase full-controlled thyristor Rectification Bridge to realize power adjustment of the HF welder.
Installed flat-wave reactor, flat-wave capacitor and filter to improve the flat-wave coefficient.
The inverter part is consisted of MOSFET single-phase inverter bridge connected in parallel. The power of single-phase bridge is 120kW; the inverter bridge adopts the building block method to realize power superposition. Every piece of bridge plates is designed in the shape of a drawer, which is very easy to install and repair.
The matching transformer is adopted for power combination, also it adopts the output method by of secondary resonance and non-welding transformer, tank circuit resonance capacitor (low voltage) resonates with the sensor directly, and the output pole plate offers required power transmission for pipe welding.
Adopted sealed equipment case, installed with air conditioner.
It realizes solid state H.F. welder remote operation and power regulation, installed with LCD which indicates armature voltage, field voltage indication and of DC drive and DC voltage, DC current indication of H.F. welders.
Applied to install inverter output cabinet and adjust inductor position. 2D and 3D adjustable.
circulation soft water is used as cooling water with temperature and water level indicator and protection
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