Optimized structural design of pit type gas carburizing furnace
Date: Jul 29th, 2022
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The pit type carburizing furnace is composed of furnace shell, furnace lining, furnace cover lifting mechanism, furnace sealing fan, muffle tank, heating element and electric control system.
The furnace shell is welded by steel plate and section steel. The furnace lining is an energy-saving composite structure made of 0.6g/cm3 high-strength ultra-light energy-saving refractory bricks, aluminum silicate fibers, diatomite insulation bricks and asbestos boards.
The furnace cover lifting mechanism is composed of motors, gear pumps and other components. When opening the furnace cover, just press the button on the control box, and the furnace cover will rise at a speed of 30-70mm/s. For safety consideration,
ROCHO pit type carburizing furnace is equipped with two travel switches on the lifting shaft. When the furnace cover rises, the lower travel switch automatically cuts off the main circuit power supply of the control cabinet of the carburizing furnace, so that the heating element is powered off and stops working. The travel switch limits the height of the lift shaft to prevent the lift shaft from rising too high and falling out.
The furnace sealed fan is installed on the furnace cover, which is used to stir the atmosphere in the muffle tank and make the composition uniform, and at the same time, the furnace temperature tends to be uniform. There are also three process pipes on the furnace cover leading to the furnace muffle tank:
A three-headed stainless steel dripper is installed on the top of a casing, and the three-headed dripper injects formazan, kerosene or other organic liquids into the furnace. All kinds of liquids can be adjusted. Ammonia gas is transported in the furnace for carbon and nitrogen co-infiltration (the nozzle can be closed when not in nitriding process);
A casing is a sampling tube, and a pipe joint on the upper part of the casing can be connected with a "U"-shaped glass tube pressure gauge to monitor the furnace muffle tank. The function is to maintain the furnace pressure and ensure carburizing or carbon and nitrogen Infiltration is performed normally, it is made of heat-resistant steel (casting).
The heating element is made of electrothermal alloy wire wound into a spiral shape, installed on the inner wall of the furnace lining, and led out of the furnace through the lead-out bracket. The temperature of the carburizing furnace is transmitted by the thermocouple inserted into the furnace, and the signal is transmitted to the automatic temperature control cabinet through the compensation wire to control the temperature. The cabinet automatically controls, regulates and records the heating temperature in the furnace. The carburizing furnace is equipped with a cooling barrel for storing the processed parts, and a sand sealing groove is provided on the barrel cover.
ROCHO is engaged in the manufacture and supply of high quality industrial heat treatment furnaces. We provide industrial furnaces for a wide range of applications, such as pit furnaces, roller hearth furnace, box furnaces, car-bottom furnace, advanced technology in the gas carburizing process, carbonitriding process, quenching process, and tempering process, contact us to get a professional proposal one for your industrial applications.
