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Since the furnace bottom machinery is also hydraulically driven, it is equipped with a special hydraulic station. Therefore, the valve table for lifting and lowering the furnace door can be designed in the hydraulic station. It only needs to be led in and out from the valve station in the hydraulic station. The three oil pipes of the oil drain are connected to the hydraulic cylinders on the site to realize the opening and closing of the furnace door. The working medium of the hydraulic station is selected from No. 46 anti-wear hydraulic oil. The cleanliness level of the system is not lower than the 7 level of NAS1638. The hydraulic station is also equipped with oil pressure overload alarm, oil return block alarm, oil low alarm, oil Over temperature alarms, etc. The oil temperature is higher than 45 degrees to start the cooling circulation system. The oil temperature is lower than 20 degrees to start the electric heater, ensuring that the oil temperature is between 20 and 45 degrees, and there is also an ultra-high temperature shutdown.
Improvement of the transmission chain The original heating furnace will have a chain break accident every few months in the production process. Carefully observe the broken chain and its mouth. The reason is as follows: On the one hand, in the case of long-term work in a high temperature environment, The chain of the welded chain is easy to be elongated, and the tensile strength is obviously reduced, which is easy to break. The long-term high temperature influence will cause oxide on the surface of the chain, reduce the surface quality of the chain, affect the strength of the chain, and increase the wear of the chain. , the service life of the chain is reduced; on the other hand, during the lifting process, the welding links of the sprocket are frequently subjected to alternating bending stress, and the relative friction between the links is continuously generated, and the generated heat and the radiation of the furnace mouth The heat gradually gathers, causing the friction surface of the chain to locally generate high temperature and plastic deformation. When the tensile stress of the load exceeds the yield strength of the link material, the link breaks. Taking into account the previous factors, in the design improvement of this new furnace, the plate chain was used instead of the welding chain. The slat chain drive is realized by the sprocket tooth shifting the pin on the plate chain, so the chain plate itself is not subjected to alternating loads. And the relative friction between the sprocket teeth and the pin shaft is very small, and each plate chain is composed of 68 chain plates and pins. Therefore, under such severe conditions, the plate chain is much more reliable than the welded chain.