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Induction coil
I. Induction Coil Manufacturing Process
Induction coil Made of solid, durable, highly conductive TU1 oxygen-free copper tubing, formed into a parallel structure with no joints in the middle, copper tube wall thickness ≥5mm The insulation process of the induction coil is as follows: Coil sandblasting → Overall dipping (high-temperature insulating porcelain) → Vacuum baking → Coil winding insulation tape (mica tape, glass fiber tape) → Electrostatic spraying of insulating resin The insulation level is superior to H level, and the insulation layer withstands voltage greater than 7000V.
The adjacent copper tubes of the induction coil are strictly insulated, and advanced segmented technology is adopted. There are no welds between different segments. After welding, two inspection procedures are used to ensure that no water leakage will occur at the welding point. First, ultrasonic flaw detection is used to check for internal defects in the welding, and then an 8kg/cm2 pressure water pressure test is conducted for 36 hours without leakage. Then, the coil is sprayed with insulating paint to make it a complete structure, and it is pressed by the upper and lower steel structures in the furnace body. The overall structure is strong and there is no deformation problem. The number of coil turns is designed according to relevant parameters to obtain the maximum electrical efficiency, and the coil is supplied with cooling water from multiple water channels, evenly distributed. At the outlet, several water temperature probes are installed separately according to the water channels.
The induction coil is fixed by a series of bolts and Bakelite columns welded to its outer circumference. When the Bakelite columns are made, a countersinking method is used, and all bolts are tightened in a countersunk manner to maximize the insulation strength. After the coil is fixed, the inter-turn spacing error is no more than 2mm. A silicone rubber gasket is installed between each turn of the coil and the screw to prevent screw discharge, and the thermal expansion and contraction between the Bakelite strip and the coil plays a buffering role.
Faraday short-circuit rings are set at the upper and lower parts of the induction coil to guide and concentrate the induced magnetic field to the melting area, preventing the furnace body section from heating and eliminating the heating of the external metal structure. At the same time, both the upper and lower parts of the induction coil are equipped with stainless steel water-cooled rings, which aim to make the furnace lining material heat evenly in the axial direction and extend the service life of the furnace lining.
II. Technical Features of Induction Coil
Serial Number
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Features
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Advantages
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Remarks
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1
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Coil Structure
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Maximizes power utilization efficiency and significantly improves energy saving.
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2
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Coil Material |
TU1 copper tube with a wall thickness of no less than 5mm. |
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3
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Insulation Process
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Enhanced insulation level, unaffected by external moisture.
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4
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Coil Welding Inspection Process |
Industry's first non-destructive testing, long-term high-pressure airtight test, ensuring no leakage in the welded copper tube. |
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5
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One-piece Parallel Coil Process
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Effectively bears the stress around the coil without deformation. The electromagnetic flux generated by the coil is uniform and stable, preventing coil rewinding and suppressing noise and vibration.
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6
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Faraday Short-Circuit Ring Design
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Fully absorbs leakage magnetic flux at both ends
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7
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Stainless Steel Water-Cooled Ring Design
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Even heating of the furnace lining, extending the service life of the furnace lining.
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8
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Water Temperature Detection Device
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Water temperature interlock alarm, automatic shutdown control
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9
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Insulation Level
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H level |
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10
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Insulation Layer Withstand Voltage Level |
≥7000V |
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Xi'an Aobang Technology Co., Ltd. is one of the earliest manufacturers in China to mass-produce medium-frequency furnaces. Main products include medium-frequency power supplies, IGBT power supplies, melting furnaces, heating furnaces, and a full range of induction heating equipment. Long-term Focus on Induction heating equipment Research and development and manufacturing Based in Xi'an, Aobang Technology takes "technology-driven industrial heating innovation" as its mission. Relying on the core technology accumulated from early large-scale production, it provides customers with full-cycle services from equipment selection and installation and commissioning to process optimization.
Ancient city welcomes guests, let's talk about Aobang's affection Looking forward to cooperating with more industry partners to expand the innovative boundaries of induction heating technology. 13891865812 Mr. Luo
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Xi'an Aobang Technology Co.,Ltd
Mobile: 008613891865812 (Mr. Luo)
Mobile: 008613772030598 (Manager Wang)
Phone: 008602986196449
Email: aobangkeji@aobangkeji.com
Address: Boai Industrial Park, No. 268 Caotan Sixth Road, Xi'an Economic and Technological Development Zone
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