Medium frequency through heating furnace head

? ? ? Medium frequency diathermy furnaceIt is a thyristor variable frequency induction heating equipment. It is an organic combination of variable frequency power supply and induction coil stove. It is also a representative of electromagnetic induction stove heating.Medium frequency diathermic furnace burnerThe main function is to be used for the thermal processing of round steel, steel plates, steel pipes and non-ferrous metals. It has the characteristics of fast heating speed, high degree of automation, simple and convenient operation and good uniformity of thermal quality. here,Haishan electric furnaceThe editor will introduceMedium frequency diathermic furnace burner。

? ? ? ?1、Medium frequency diathermic furnace burnerIt is a non-standard induction heating equipment. The variable frequency current generated by the variable frequency power supply must pass through the furnace coil to generate a magnetic field. However, the currentMedium frequency diathermic furnace burnerThe use environment is relatively poor, with a lot of dust or iron filings. Since iron filings or iron slag can easily fall onto the burner induction coil, this will cause carbonization of the interturn surface of the burner induction coil of the Haishan electric furnace. As a result, short circuit and sparking between coil turns will break down the copper tube of the induction coil of the stove, causingMedium frequency diathermic furnace burnerfailure. therefore,Medium frequency diathermic furnace burnerThe structure, manufacturing process, insulation treatment, turn-to-turn distance, furnace head material and furnace lining protection are particularly important.

? ? ? 2、Medium frequency diathermic furnace burnerOr called an inductor coil, it is generally made of rectangular copper tubes with consistent metal flow and dense structure. The rectangular copper tubes are made of 99.9% T2 copper.Medium frequency diathermic furnace burnerThe induction coil inside is designed with the inherent length of the rectangular copper tube in mind when designing the water path and coil grouping. It is composed of burner coils with different numbers of turns and is fixed together with bakelite pillars. In addition, each set of burner coils is combined with the welding of copper pipes and the parts that conduct electricity and water, so that each set of burner induction coils is wound around the entire copper pipe without the need for welding seams inside.

? ? ? ?3、Medium frequency diathermic furnace burnerIt is composed of rectangular copper tubes, furnace lining materials, water-cooling guide rails, cooling water channels, insulation materials, bakelite columns, copper screws, bottom brackets, furnace mouth plates, shells, etc.

? ? ? ? 4、Medium frequency diathermic furnace burnerThe material is made of national standard high-quality TU1 oxygen-free copper tube. The copper content of the copper tube is more than 99.99%, the conductivity is 102%, the tensile strength is 220kg/cm, the elongation is 46%, the hardness is HB35, and the insulation resistance is ≥1MΩ.The outer insulation of the stove head is sprayed with a layer of high-strength insulating resin using an electrostatic spraying process. The temperature resistance exceeds 600 degrees and the withstand voltage of the insulation layer is greater than 5000V.

? ? ? ? 5、Medium frequency diathermic furnace burnerIt is a spiral coil made of rectangular copper tubes wound according to the designed diameter and number of turns, and then fixed by copper screws and bakelite posts. It undergoes four insulation treatments, that is, first spraying insulating paint, then wrapping tape, and then spraying insulation. After the paint is cured, it is installed on the bottom bracket, surrounded by auxiliary 8mm back bakelite boards, and finally the furnace lining is knotted to protect the coil. These insulation treatments can effectively prevent coil ignition, current leakage and other phenomena. This ensures the service life of the long bakelite column of the burner head and the entire induction coil of the intermediate frequency furnace.

? ? ? ? 6、Medium frequency diathermic furnace burnerAccording to the different shapes of the heated workpiece, it is divided into circular through type, flat gap type, and special-shaped imitation type;

Medium frequency diathermic furnace burnerAccording to the purpose of heating the workpiece, it is divided into forging heating furnace, casting smelting furnace, heat treatment quenching and tempering heating furnace, steel plate heating furnace and rolling heating furnace.

? ? ? ? 7、Medium frequency diathermic furnace burnerThe water-cooled guide rail inside is actually the moving track of the heated workpiece, which is always working at high temperature. If there is insufficient water flow or insufficient water pressure, vaporization, red burning, and deformation will occur, and the heated workpiece will not be able to sense. Generally, the wall thickness of water-cooled guide rails is 2mm. Therefore, the use of water-cooled guide rails has a certain period of time. If there is excessive wear, it must be replaced. Otherwise, once water leaks, it will cause rapid cooling of the furnace lining, which will directly affect the use effect of the furnace lining. It is prohibited to use the furnace lining as a guide rail for heating workpieces.

? ? ? ?8、Medium frequency diathermic furnace burnerFurnace lining is used internally to isolate the heated metal materials and coil copper tubes. The furnace lining protects the furnace head coil of the intermediate frequency furnace.Medium frequency diathermic furnace burnerThere are two types of lining materials for inductor coils:

? ? ? ?a)Medium frequency diathermic furnace burnerThe furnace lining is made of ram-cast furnace lining with high temperature resistance, high thermal strength and good insulation performance. The refractoriness inside the sensor is 1750°C. This structure makes the inductor have a long life and the induction coil has a high protection level. It is a new furnace construction process. It also facilitates the installation and alignment of online temperature measurement and has high temperature measurement accuracy. It is often used in current heating processes.

? ? ? ? b)Medium frequency diathermic furnace burnerSilicon carbide prefabricated furnace lining is used, and the outside is wrapped with insulation and heat preservation materials. Refractory degree 1450℃, easy to replace. However, it is not conducive to temperature measurement and control of workpiece heating. It is not suitable for heating large workpieces and is fragile.

4) The installation standards, appearance dimensions, circuits, waterway connections, etc. of the furnace head sensor of the medium frequency heating furnace have all considered interchangeability to make it easy to replace. The waterway is a quick-change joint.

? ? ? 9、Medium frequency diathermic furnace burnerDepending on the length of the heated workpiece and the diameter of the workpiece, the inductor burner may be long or short. But in general, the diathermic sensor is generally relatively long (referring to the axial direction of the heated workpiece), and its purpose is to achieve a temperature difference between the core and the surface. In principle,Medium frequency diathermic furnace burnerIn design, special computer software is generally used combined with certain experience to obtain reasonable heating functions and ensure heating efficiency.

? ? ? ?10、Medium frequency diathermic furnace burnerDuring the heating process, a lot of oxide scale that falls off the heated workpiece will accumulate in the sensor. If the furnace lining is damaged, or has cracks or cracks, if it is not cleaned in time, it is easy to catch fire and cause a short circuit between turns of the intermediate frequency reactor. Therefore, the oxide scale in the burner head of the medium frequency induction furnace should be cleaned at least once every shift (8 hours).

? ? ? ?11、Medium frequency diathermic furnace burnerAfter the new medium frequency induction furnace burner that has just been put into production is powered on, it must be baked at low power (usually around 30KW), and the heated workpiece must be placed in the induction furnace for about 2 hours. After 2 hours, production will start at high power. .

If anyMedium frequency diathermic furnace burnerFor needs, please call Manager Guo at 13891812360; moreMedium frequency diathermic furnace burnerFor information, please follow the website of Shaanxi Haishan Mechanical and Electrical Co., Ltd. http://www.sxhszpl.com