The working principle of the trolley type quenching furnace is as follows:

The trolley can move and tilt, so it is different from a general trolley furnace. Before operation, the trolley is loaded outside the furnace. The workpiece that needs to be heated is placed on the furnace bottom plate of the trolley or a dedicated shim by a crane. Then, the chain drive mechanism sends the trolley into the quenching furnace for heating. After heating, the electric motor pulls the trolley out of the furnace, and then the tilting device is activated to unload the material. The electric motor mechanism can flip the trolley at a certain angle. Quickly pour the workpiece into the side quenching pool for quenching. No basic installation required, it can be used on a level surface.

The structure of the trolley type quenching furnace consists of the following four parts:

1. Heating furnace body: The furnace body is a long rectangular body welded from steel sections and steel plates. The furnace lining adopts an energy-saving structure, which heats up quickly and saves about 40% energy compared to brick furnaces. It is made of high-quality long fiber felt as raw material and special equipment. Compared with other products, the advantages are low thermal conductivity, low heat capacity, excellent corrosion resistance, excellent thermal stability, thermal shock resistance, insulation, and the anchor is set on the cold surface of the furnace body, which improves the high temperature resistance strength of the fiber.

2. Heating element: Made of high-temperature resistance alloy wire wound into a strip, suspended on both sides, front and rear of the furnace, and fixed with high aluminum porcelain nails for safety and simplicity.

3. Mobile loading trolley: The trolley frame is formed by welding steel sections, and its rigidity ensures that it will not deform under full load. The interior is built with refractory bricks, and the collision prone and load-bearing parts are built with high alumina refractory bricks to enhance the strength of the furnace lining structure. The trolley adopts a self-propelled structure, driven by a reducer sprocket to move on the track. The sealing of the trolley adopts an automatic maze structure and contact double sealing. When the trolley is driven out, it is electrically controlled and equipped with an electromagnetic brake to prevent inertia from hitting the furnace body. It is also chain controlled, that is, when the furnace door is slightly opened, the heating element is automatically cut off, and the power supply of the trolley walking mechanism is restored

4. Electrical control system: The entire electric furnace is divided into multiple zones for individual temperature control. Each temperature zone has a thermocouple for temperature control and temperature detection. The control method is programmable PID automatic adjustment, using a thyristor zero crossing trigger circuit for temperature adjustment and zero crossing trigger. The intelligent digital temperature controller can be used for temperature setting, correction, digital display, control, and sound and light alarm after overheating.