Coke oven door knife edge web plate

When encountering the removal of rusted bolts and stainless steel nuts on the web plate of the coke oven door blade,it can be soaked in kerosene for 20 to 30 minutes.And use a hammer to hit the circumference of the nut,which can loosen the rust layer and then screw it out.If this method cannot screw it out,you can use a blowtorch to heat the nut.The belly plate of the furnace door blade should take advantage of the expansion of the nut and the light heating of the screw to unscrew the nut.If it is a standard part of a threaded sliding buckle,a large hole can be drilled at the thread,and then the bolt can be remade by increasing the original screw hole to unscrew the nut.

When encountering a broken head screw,if the diameter is large and loose,a hammer and chisel can be used to slowly remove it in the direction of the thread.If the broken head screw is higher than the end face,it can be filed into a square and then screwed out,or a stainless steel screw can be welded to the furnace door knife edge web plate at the broken head screw to screw it out.If the broken head screw does not expose the end face or has less exposed end face,it can be drilled at the broken head and then wedged into a steel shovel to screw it out.Alternatively,when it is allowed to increase the screw hole,a drill bit can be used to drill the broken head out and re increase the thread to screw it out.

The belly plate of the furnace door blade is the core component on the coke oven door,playing a sealing role.The working temperature of the knife edge web is above 1000℃,and it is prone to fatigue fracture under alternating loads.It is one of the vulnerable parts in the coke oven door components,among which the fatigue fracture of the I part of the knife edge web is the main reason for the scrapping of the knife edge web.Therefore,the service life of the blade edge web will directly affect the improvement of production costs and efficiency for users.Before the improvement,the knife edge web plate was connected to the furnace door body using M24 bolts,which is a rigid connection.In working condition,in order to compress the knife edge sealing surface and the furnace door frame sealing surface,the spring was in a compressed state,causing deformation of theÉpart of the knife edge web plate.When preparing to discharge the coke,remove the furnace door and reset the spring,causing reverse deformation of theÉpart of the knife edge web.In this way,with each removal and installation operation of the furnace door,there is alternating deformation at theÉpart of the knife edge web.In addition,the knife edge web is in a high-temperature state,which can easily cause fatigue fracture at theÉpart,resulting in the entire knife edge web being scrapped.After the improvement,the knife edge web is floating connected with the furnace door body,and the spring presses the knife edge to make the knife edge sealing surface and the furnace door frame sealing surface compact,playing a sealing role.At the same time,the double end studs slide freely in the adjustment screw plug,so that the web is in a free state.When the furnace door needs to be removed for coke discharge,the spring is reset,and the double head studs are moved down accordingly,so that the knife edge web is still in a free state.Due to being always in a free state and no alternating deformation,the service life of the furnace door knife edge web plate has been improved after improvement.