What is the specific composition of pit heating furnace equipment
Oct. 14, 2020
What is the specific composition of pit heating furnace equipment
The furnace shell of the pit heating furnace is formed by welding section steel and high-quality steel plate, which can realize the sealing between the furnace cover and the furnace body, and a smoke exhaust device is set on the upper part of the furnace shell.
The furnace cover with heat preservation function of the pit heating furnace can be airtightly matched with the furnace pot to ensure a good airtightness of the furnace atmosphere. The lower part of the pit heating furnace is equipped with an air collecting hood, which can cooperate with the deflector. The circulation fan of the pit heating furnace is installed on the furnace cover to enhance the uniformity of temperature and atmosphere. The lifting and rotating of the furnace cover of the well-type heating furnace is a swing arm axis transmission mechanism, and the furnace cover is equipped with a lifting guide device. The lifting and rotating of the furnace cover is a swing arm axis transmission mechanism.
The furnace cover is located on the ceramic fiber braided rope of the flange on the furnace mouth. A wind deflector matched with the deflector tube is installed under the heat preservation bag of the cover body, and the wind deflector is hung on the flange panel of the cover body through a plurality of suspension rods. The automatic lifting and walking structure of the furnace cover runs smoothly, and the service life is not less than 5 years.
The bottom lining of the pit heating furnace is made of light clay bricks and heavy anti-carburizing masonry, the furnace wall lining is a composite furnace lining structure, the refractory layer is made of light clay bricks, and the insulation layer is made of ceramic fiber cotton or clay bricks. The layers are optimized. The pit heating furnace is prefabricated with stainless steel hooks in the refractory layer for the installation of resistance wires.
The heating device is evenly arranged around the furnace lining wall. The pit heating furnace is made of high-temperature electric heating alloy strips wound into a corrugated shape and distributed in each heating zone. The installation method ensures heating uniformity, service life and high reliability. Easy to maintain. Each heating zone of the pit heating furnace is equipped with a thermocouple for temperature measurement and over-temperature alarm.
Pit-type heating furnace tempering furnace is mainly composed of furnace shell, furnace lining, heating element, furnace pot, air duct, furnace cover, furnace cover lifting and rotating (or translation) system, circulating fan and other parts. The heating system effectively controls the temperature to ensure the temperature uniformity of the effective heating zone.
The structure of the pit furnace is: the furnace body is a cylindrical deep well, and the workpiece is vertically loaded into the furnace by a special crane for heating. The fuels used are usually gas and oil. When electricity is used as the heat source, it is called a well-type resistance furnace. Pit furnaces are generally placed below the ground level of the workshop, and some are placed above the ground level, or half of the above ground level.
