A furnace cover lifting mechanism and a nitriding furnace using the mechanism

Abstract

The invention relates to a furnace cover lifting mechanism and a nitrogenation oven with the mechanism. The furnace cover lifting mechanism comprises a guiding base, a guiding column and a hydraulic lifting mechanism used for supporting the guiding column to rise and fall. The guiding base is provided with a first shaft base perpendicular to the guiding base. The guiding column is in sliding fit in the first shaft base. The top end of the guiding column penetrates the first shaft base to be fixedly connected with a connecting beam with one end connected with a furnace cover. The bottom end of the guiding base horizontally extends out to form a support. The hydraulic lifting mechanism comprises a hydraulic oil cylinder, an oil pipe and an electric hydraulic pump. The hydraulic oil cylinder is installed on the support and communicated with the electric hydraulic pump through the oil pipe. A lifting shaft of the hydraulic oil cylinder is connected with the guiding column through a spherical steel ball. The guiding column and the lifting shaft are movably connected through the spherical steel ball. The stress situation of the guiding column and the lifting shaft in the furnace cover opening and closing driving process can be automatically adjusted, the distortion deformation is eliminated, rigidity of the guiding column and the lifting shaft is effectively guaranteed, the stability in the lifting process is improved, and the service life of the overall structure is prolonged.

Description

Technical field: [0001] The invention relates to the technical field of industrial furnaces, in particular to a furnace cover lifting mechanism and a nitriding furnace using the mechanism. Background technique: [0002] A few days ago, due to the high temperature performance of the nitriding furnace, the furnace cover is required to be insulated, which makes its weight often heavy. In the process of use, the furnace cover needs to be opened to check the state of the furnace. Such as figure 1 As shown, the lifting mechanism of the traditional nitriding furnace cover is that the hydraulic cylinder drives the lifting shaft 1' to drive the furnace cover 2' to move up and down, so as to realize the opening and closing of the furnace cover 2'. The lifting mechanism adopts a lifting shaft 1' to realize The up and down movement of the furnace cover 2', because the furnace cover 2' is connected to the top of the lifting shaft 1' through the bracket 3' produces a large cantilever mom...

AI Technical Summary

Problems solved by technology

like figure 1 As shown, the lifting mechanism of the traditional nitriding furnace cover is that the hydraulic cylinder drives the lifting shaft 1' to drive the furnace cover 2' to move up and down, so as to realize the opening and closing of the furnace cover 2'. The lifting mechanism adopts a lifting shaft 1' to realize The up and down movement of the furnace cover 2', because the furnace cover 2' is connected to the top of the lifting shaft 1' through the bracket 3' produces a large cantilever moment, which requires high rigidity of the lifting shaft 1' and the performance of the hydraulic cylinder. As the number of uses increases, the rigidity of the lifting shaft decreases, such as figure 2 As shown, the lifting shaft 1' is distorted and deformed due to the change of force, which causes the furnace cover 2' to shake unsteadily or even fail to lift, the hydraulic cylinder is severely worn, the service life of the equipment is greatly reduced, and potential safety hazards are likely to occur. The larger the cover, the more serious the above problems

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