The structural features of the井式回火炉

The furnace cover lifting mechanism varies for pit-type tempering furnace covers, with small pit furnaces typically using lever mechanisms. Large pit-type tempering furnaces come in two structures: hydraulic and electrically driven. The hydraulic furnace cover lifting mechanism employs an electric oil pump to push the piston rod of the cylinder, lifting the cover; the electric furnace cover lifting mechanism uses a screw to raise and lower the supporting pillar, thereby moving the cover. The fan circulation device usually features a top-mounted, directly connected structure for pit-type tempering furnaces, while large pit-type furnaces often use side-mounted or bottom-mounted fans, which are connected to the furnace body through ducts. The fans are typically centrifugal.