Technical requirements for trolley furnace door

The furnace door device is very important in the composition of the trolley furnace. It is composed of a furnace door, a furnace door lifting mechanism and a furnace door pressing device. The furnace door shell is welded by section steel and plate to form a firm frame structure, and the interior is laminated with refractory fiber pressing modules, which require good heat preservation performance and light weight. The lifting device of the furnace door adopts an electric device, which is mainly composed of a furnace door frame, a furnace door lifting beam, a reducer, a sprocket, a transmission shaft, and a bearing. The furnace door lifting is driven by the positive and negative transmission on the reducer to drive the furnace door up and down. . The furnace door lifting reducer is also equipped with a brake device, which can effectively prevent the furnace door from displacement during the lifting process.

The trolley furnace door pressing device adopts the domestic advanced spring-type pressing structure. When the furnace needs to be lifted, the furnace door’s own weight will automatically loosen the furnace door through a lever, move it horizontally for a certain distance and then rise, when the furnace door is lowered into place When the furnace door is put down on the pulley on the trolley and needs to be pressed, the spring force is used to move the furnace door horizontally into the compressed and sealed state through the lever. The pressing device of this structure makes the fiber plane on the furnace door and There is no friction between the furnace mouth cotton, which has the characteristics of good safety performance and long use mission.

The trolley frame of the bogie furnace is formed by welding section steel, and its rigidity is guaranteed not to be deformed under full load. The interior is built with refractory bricks, and the easy-to-collision parts and load-bearing parts are built with heavy bricks to enhance the structural strength of the furnace lining. The trolley seal adopts an automatic labyrinth structure and soft-contact double seals. The trolley enters the furnace through the action of the cam and the inclined surface of the roller, and then automatically rises to seal. When the trolley is driven out, the sealing groove will fall automatically, and the sealing sand in the sealing groove does not need to be added frequently after being filled.

When the trolley is driven out, the lifting of the furnace door of the trolley is electrically controlled, equipped with electromagnetic brakes to prevent inertia from hitting the furnace body, and interlocked control, that is, after the furnace door is slightly opened, the heating element is automatically cut off and the trolley is resumed to travel. Institutional power supply. After the furnace door is closed in place, the power supply of the traveling mechanism of the trolley is automatically cut off, and the power supply of the heating element is restored at the same time.