Furnace liner of trolley type electric resistance furnace

Abstract

The invention discloses a furnace liner of a trolley type electric resistance furnace and relates to the field of industrial machinery. The furnace liner comprises a furnace bottom, a furnace casing and a furnace cover; the furnace bottom is provided with an asbestos plate; the furnace casing is provided with a fiber backing plate which is connected with a heat insulation fiber blanket; the heat insulation fiber blanket is provided with a vacuum forming block which is provided with an electric heating element; the electric heating element is connected with a thermocouple device; a supporting wall is arranged behind the furnace liner; the supporting wall is connected with the casing; the supporting wall is provided with a through hole; a transparent plate is arranged in the through hole. According to the furnace liner of the trolley type electric resistance furnace, the problems of heat insulation and heat preservation of the bottom of the furnace liner are effectively solved, the heat loss is less, materials and the time are effectively saved, and the heating rate and the stability are effectively improved; the transparent plate is arranged in the through hole and accordingly the internal conditions can be clearly observed and the safety is high; the design is simple and skillful and the popularization and the application are convenient.

Description

Technical field [0001] The invention relates to the field of industrial machinery, in particular to a furnace lining of a trolley type resistance furnace. Background technique [0002] The trolley-type resistance furnace can meet the requirements of a variety of heat treatment processes. It is a heating equipment widely used in heat treatment workshops. Small enterprises and township enterprises have fully realized the importance of heat treatment of workpieces. Many heat treatment enterprises have emerged as the times require. Box-type resistance furnaces Become the preferred heat treatment equipment, generally medium temperature trolley-type resistance furnace, and the core part of the resistance furnace lining plays a decisive role in the performance of the furnace, the authorization announcement number is CN 2680994 Y, the authorization announcement date is February 23, 2005 The Japanese and patent name is an invention patent of a furnace lining. The side wall is cylindri...

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Problems solved by technology

[0002] The trolley-type resistance furnace can meet the requirements of various heat treatment processes. It is a heating equipment widely used in heat treatment workshops. Small enterprises and township enterprises have fully realized the importance of heat treatment of workpieces. Many heat treatment companies have emerged as the times require. Box-type resistance furnaces It has become the first choice of heat treatment equipment, and it is generally a medium-temperature trolley-type resistance furnace, and the lining of the core part of the resistance furnace plays a decisive role in the performance of the furnace. The authorized announcement number is CN 2680994 Y, and the authorized announcement date is February 23, 2005. Japan, the patent name is an invention patent for a furnace lining, the side wall is cylindrical and has an opening, which enhances the connection strength between the substrate and the side wall, and avoids the problem that the joint between the substrate and the side wall is damaged However, this kind of furnace lining has poor heat insulation effect, and it is easy to cause the shell to overheat and damage the internal components, resulting in failure, work stop, and low safety. Moreover, it is easy to cause a large amount of waste of materials due to failure problems; moreover, this The thermal insulation performance of this kind of furnace lining is not good, the heating performance is slow, and the stability is poor; the shell strength is low, the hardness is poor, and it is easy to damage the back of the furnace lining due to the collision of the workpiece

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