Assembly type connecting structure for double-layer sealing cover of coke oven

The assembly type connecting structure comprises an upper cover body and a lower cover body, an upper cover plate is detachably arranged at the top of the upper cover body, a first thermal insulation material is filled between the upper cover plate and the upper cover body, a lower cover plate is detachably arranged at the top of the lower cover body, and a second thermal insulation material is filled between the lower cover plate and the lower cover body. A second heat preservation material is filled between the lower cover plate and the lower cover body, the upper cover body is connected with the lower cover plate through a plurality of bolt assemblies, and the bolt assemblies are sleeved with supporting sleeves. According to the utility model, the bolt assembly is matched with the supporting sleeve to form an inner and outer double-layer high-strength supporting structure, so that deformation under the influence of high temperature can be avoided, the parallelism between the upper cover body and the lower