Trolleys for trolley-type resistance furnaces

Abstract

The invention provides a bogie hearth for a bogie hearth type resistance furnace. The bogie hearth for the bogie hearth type resistance furnace is formed by cast iron which is used for bearing workpieces, a fire-proof layer, a first thermal insulation layer, a second thermal insulation layer, a base plate layer, a heating element, a thermal preservation brick and a bogie hearth body which are arranged from top to bottom sequentially; the base plate layer is formed by a plurality of strip-shaped furnace bottom plates in a splicing mode; the furnace bottom plates are made of heat resisting steel; splicing positions of the adjacent furnace bottom plates are in hasp modes; splicing positions of the furnace bottom plates are provided with thermal expanded and cold contracted gaps; the heating element is bent to be in a wave band shape through belts; the heating element is fixed on the thermal preservation brick. The bogie hearth for the bogie hearth type resistance furnace has the advantages of guaranteeing the furnace bottom temperature; improving the surficial area of the heating element, reducing the surface load of the heating element and prolonging the service life of the heating element due to the fact that the heating element is arranged on bogie hearth; meanwhile avoiding short circuit due to the fact that oxidized iron sheets fall on the heating element and improving the production safety due to the furnace bottom plates.

Description

technical field [0001] The invention relates to a trolley, in particular to a trolley used for a trolley-type resistance furnace. Background technique [0002] During the use of the trolley-type resistance furnace, when the trolley is processed after loading the workpiece, the temperature of the bottom of the furnace cannot be guaranteed because the heating element is usually installed on the furnace wall. At the same time, if the heating element is installed on the bottom of the furnace, Then the iron oxide scale generated by the workpiece during the processing falls on the heating element, which will cause a short circuit and affect the safety of production. Therefore, the above-mentioned problems should be considered and solved during the design, production and use of the trolley of the trolley-type resistance furnace. Contents of the invention [0003] The object of the present invention is to provide a trolley for trolley-type resistance furnace to solve the p...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a trolley for trolley-type resistance furnace to solve the problem that when the trolley is loaded with workpieces, the temperature of the bottom of the furnace cannot be guaranteed because the heating element is usually installed on the furnace wall. If a heating element is installed at the bottom of the furnace, the iron oxide scale generated by the workpiece during processing falls on the heating element, which will cause a short circuit and affect production safety.

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