The sealing structure between the hood and the furnace seat of the Hood Type Resistance Furnace plays a vital role in maintaining the atmosphere stability, uniform temperature and energy saving in the furnace.
Usually, a common sealing structure is to use flexible sealing materials. A high-temperature resistant sealing gasket will be installed at the contact edge of the hood and the furnace seat. This gasket is generally made of materials such as asbestos, ceramic fiber or special flexible graphite. Asbestos material sealing gaskets have good high-temperature resistance and heat insulation properties, which can prevent heat loss and air leakage to a certain extent. Ceramic fiber gaskets are also resistant to high temperatures, and have good flexibility and chemical stability. They will not easily react chemically with the gas or heated materials in the furnace under high temperature conditions.
In terms of sealing methods, some Hood Type Resistance Furnaces use mechanical compression sealing. By setting a connecting device on the hood, such as bolts or clamps, the hood is tightly pressed against the furnace seat. When the bolts are tightened, the sealing gasket is evenly compressed, thereby filling the small gap between the hood and the furnace seat to achieve a good sealing effect. This method can adjust the tightness of the seal according to actual needs to ensure the reliability of the seal.
In addition, some resistance furnaces use a slot-type sealing structure. Matching slots are set on the furnace base and the cover, and the sealing gasket is installed in the slot. When the cover is placed on the furnace base, the slot can accurately position and fix the sealing gasket to prevent it from shifting during use. At the same time, the design of the slot also enables the sealing gasket to better withstand the weight and internal pressure of the cover, further enhancing the sealing effect.
In order to ensure the long-term effectiveness of the seal, a protective device will be set around the sealing structure to prevent external objects from damaging the sealing gasket during operation. At the same time, regular inspection and replacement of the sealing gasket is also an important measure to maintain good sealing performance, because with the increase of use time, the sealing gasket may age, wear, etc., which will affect the sealing effect.
