2000×900×600mm Heat Treatment Car Bottom Furnace Quenching Furnace Electrical Bogie Hearth

2000×900×600mm Electrical Car Bottom Furnace Bogie Hearth  Quenching Furnace

1. Application

The RT3-100-12 electrical bogie hearth furnace is mainly used

for quenching, structural steel, cast steel, spring steel and tool steel.

2. Structural Introduction

The RT3-100-12 bogie hearth furnace is mainly comprised of furnace body,

lining, furnace door and door compression system, bogie, heating element,

circulation device and temperature control system.

2.1 furnace body

The wholesale car bottm furnace body steel structure is made from 8-12#

sectional steel and ≥4mm 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 heat treatment furnace trolley is built with an all-fiber system. The lining

material used is quality aluminum fibers fixed by round steel parts. The aluminum

fibers are pre-compressed into blocks (compression gravity: ≥230Kg/m3 ) and then

fixed to the furnace body by round stainless steel parts. This refractory lining

structure has the advantages of low heat conductivity, strong anti-shock capacity,

and anti-erosion. The lining has a total thickness of 350mm. The silicate aluminum

fiber resists a maximum temperature of 1260℃.

2.3 furnace door and door up-down system

The high temperature trolley type furnace door is comprised of all-fiber lining and

steel structure casing. The door frame is made of 12mm steel plate. The door is

built with silicate aluminum fiber blocks same as that for the furnace body. The

overall structure of the furnace maintains its shape while heated.

Driving method of door: The furnace door is electrically lifted upward and downward

by the hoist. And it is sealed by spring.

2.4 bogie

The bogie is comprised of bogie frame, wheels, refractory bricklaying body, heat

resistant bogie face plate, heating elements, and bogie driving mechanism.

bogie structure: the bogie frame is made from 14# beam and 12mm steel plates.

The bogie could work for a long time without deformation at full load.

wheel: The wheels are made from ZG55# steel casting. The transmission shaft is

made from 45# steel, and it is heat treated. The transmission bearing is of the heavy

type pillar bearing to bear the weight. There are a total of 6 of wheels, and each

wheel is of diameter 240mm.

bricklaying body: The bogie is built with a combination of high alumina refractory bricks,

light refractory bricks, and heat preservation bricks. The bricklaying body of the bogie

has heating elements installation slot for easy installation of the heating elements.

The impacted parts and weight bearing area are bricked especially with heavy type

high aluminum refractory bricks. There is also free space left for the refractory lining

expansion when heated.

Bogie face plate is cast with Ni7N, 30mm. The max temperature≤1200℃. It has

long - term use without deformation and cracking.

Sealing: The seal between furnace door and furnace body and bogie is more important.

The seal between furnace door and furnace body adopts spring compression structure.

The seal between bogie and furnace body is seal of special-shaped brick and fiber

cotton block.

2.5 heating element

heating element: The 0Cr27AL7Mo2 resistance spiral-shape alloy resistance strips

are mounted in 5 side walls, two side walls, back wall, furnace door and bogie bottom.

The resistance strips are produced through special molds, and are installed in the

furnace wall by porcelain nails. And there is a porcelain gasket between the fiber wall

and the resistance strips to avoid short-circuit. There are 1 heating zone. All lead-out

conductor bars are made of φ16 0Cr27AL7Mo material.

2.6 electrical control system

Temperature control: the furnace adopts intelligent temperature controller to control

the temperature which has self-tuning function to calculate the ideal PID parameter

and achieve a temperature stability. The temperature controller has the functions of

over-temperature alarm and thermal couple breakage protection.

The furnace has 1 temperature control zone for controlling the linkage between the

temperature and the motor movements. Each zone is set with an over-temperature alarm.

The heating loop adopts the double-direction SCR and trigger control. The power is regulated

in the time proportional regulation manner.

The control actuation system is a large-power triggering one complete with a radiator and

an air cooling system. There is also an air switch. The heating loop is equipped with

ammeter, voltmeter, heating element on-off indicator, power-on interlock protection,

and safe earthing measures.

Movement control: The control system mainly controls the door up-down movement,

door compression, and door in-out movement. Also the movements are necessarily

linked to ensure the operation safety.

3.Main Technical Parameters

4. Supply Scope