550℃ 1350×1000×700mm Heat Treatment Car Bottom Furnace Electrical Bogie Hearth

550℃ 1350×1000×700mm Heat Treatment Car Bottom Furnace Electrical Bogie Hearth

1. Application

The RT3-65-6 electrical bogie hearth furnace is mainly used

for annealing process of structural steel, cast steel, spring steel,

tool steel and carbon steel.

2.Structural Introduction

The RT3-65-6 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 bogie hearth furnace manufacturer body steel structure is made from

10-12# sectional steel and ≥3mm 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 bogie hearth furnace for sale 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 240mm. The silicate aluminum

fiber resists a maximum temperature of 950℃.

2.3 furnace door and door up-down system

Thecar bottom furnace price door is comprised of all-fiber lining and steel structure

casing. The door frame is made of 10mm 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 12# beam and 10mm 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 2 pairs 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.

The bottom plate of furnace is made of CrMnN material with the total thickness of 30mm.

The bottom plate resists a maximum temperature of 950℃.

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 0Cr25AL5 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 0Cr25AL5 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 wholesale car bottm 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.

2.7 Hot air circulating system:

It is mainly comprised of two axial flow fans in the furnace. The heat emitted by the

heating element is evenly blown to the effective working area by the circulating fan

through the wind guide plate. The air guide plate is made of 1Cr18Ni9, and the fan

and shaft are made of 1Cr18Ni9Ti. In order to ensure the normal use of bearings,

the cooling method is air cooling.

3.Main Technical Parameters