1. Application
The gas fired bogie hearth furnace is mainly used for heat treatment of metal parts.
2. Structural Introduction
2.1 furnace body
The car bottom furnace body steel structure is made from 8# -12#U
steel and steel plates. The side pillar and back pillars are made from
sectional steel, and are reinforced with sectional steel bracings. The
external wall of the furnace is painted with 2 layers of primers, and 2
layers of coating paint. The key part of the furnace is painted with heat
resistant paint.
2.2 lining
The main material of the furnace lining is the composite refractory fiber
folding block containing zirconium and chromium at the long-term service
temperature of 1250℃. This refractory lining structure has the advantages
of low heat conductivity, strong anti-shock capacity, and anti-erosion. Aluminum
silicate fiber compression block with thickness of 300mm is designed as the
high temperature refractory layer.
2.3 bogie
The bogie is comprised of heat preservation material, bogie frame and moving
mechanism. The refractory layer is divided into 3 sub-layers, i.e., 1st top
high-alumina brick layer, and 2nd and 3rd layer with both light clay bricks.
The bogie framework is made of 12# I-beam and 12# frame beam. The bogie
has enough rigidity to ensure no deformation under full load operation. The gap
between the two sides of the furnace bogie and the frame of the fire-resistant
trolley should be fixed.
The bogie surface plate is made of 10 mm high quality steel plate. The function
is to disperse the bogie load (make the load distributed evenly) and enhance the
frame rigidity.
The heat preservation material is divided into 3 layers, the top layer being
high-alumina bricks, and 2nd and 3rd layer being both light clay bricks.
The bogie traction mechanism: the trolley traveling mechanism is driven by AC
motor reducer, and the driving mode is reducer sprocket structure. The trolley
goes in and out of the furnace through the reducer sprocket in the transmission
device and the traveling wheel under the trolley to drive the trolley traveling sprocket
to mesh and drive the trolley traveling, which is stable and reliable.
The fire-resistant fiber sealing block is used for the sealing between bogie and the
furnace body, which is pressed by the lever of the electric cylinder and linked
with the electric cylinder of the furnace door. When the bogie is in the right position,
the electric cylinder drives the lever to lift up the fire-resistant fiber cotton sealing
block and push it to the gap between the bogie and the furnace body. At the same
time, the furnace door falls, and the electric cylinder acts to push the furnace door
tightly. If the bogie is discharged, the furnace door will be powered at the same time,
the electric cylinder of the trolley moves to put down the sealing block, the door rises
to the right position, and the trolley can start. The above action can be manual or
automatic continuous action. It is safe to use and convenient to maintain.
