Brief introduction to the basic structure of box type quenching furnace
The box type quenching furnace is a periodic operation furnace, which is suitable for the heat treatment of rod and long shaft parts. The structure of the box type quenching 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 fuel used is usually gas and fuel oil. When electricity is used as heat source, it is called well resistance furnace. The box type quenching furnace is generally installed below the workshop ground level, but also above the ground level, or half above and half below the ground level.
The names of box type quenching furnace include: forced convection box type quenching furnace, natural convection box type quenching furnace, well type gas carburizing furnace, etc. The box type quenching furnace can use gas or liquid fuel or electric heating. When using gas fuel, there are usually several burners with small energy, which are installed along the tangent direction of the inner wall of the furnace. They are arranged in layers or spirals at a height to avoid the flame washing the workpiece directly and ensure the temperature in the furnace is uniform. When it is used for low temperature tempering or oil as tender material, a thin muffle wall is built in the furnace to separate the combustion space from the heating space, but the box type quenching furnace with muffle wall has a relatively high fuel consumption.