Water-cooled cantilever roller in furnace

Abstract

The invention provides a water-cooled cantilever roller in a furnace. The water-cooled cantilever roller comprises a furnace roller and a roller shaft, wherein the first end of the furnace roller is located in the furnace, the second end of the furnace roller penetrates through the furnace wall and extends out of the furnace to be connected with the first end of the roller shaft, the interior of the furnace roller is divided into a first cavity and a second cavity, the first cavity is located in the furnace, the second cavity extends to the outside of the furnace from the position close to theinner surface of the furnace wall, and a fire-resistant heat-insulating element fills the second cavity. According to the water-cooled cantilever roller, the furnace roller and the roller shaft are connected outside the furnace, and compared with the situation that the furnace roller is connected with the shaft in the furnace in the prior art, the temperature of the roller shaft can be greatly reduced, and the strength of the roller shaft is guaranteed; and meanwhile, the interior of the furnace roller is divided into the first cavity and the second cavity, and the fire-resistant heat-insulating element is arranged inside the second cavity extending from the inner side surface of the furnace wall to the outside of the furnace, so that the temperature in the furnace can be effectively prevented from being transferred to the outside of the furnace through the furnace roller, the transfer of heat in the furnace to the roller shaft is further reduced, and the heating of the roller shaft is avoided while the loss of heat in the furnace is reduced.

Description

technical field [0001] The invention relates to a cantilever roller table in a furnace in the metallurgical industry, in particular to a cantilever roller without water cooling in a furnace. Background technique [0002] Most of the furnace cantilever rolls used in industrial furnaces are surface-cooled cantilever rolls and roll shaft-cooled cantilever rolls. Both the roller surface cooling cantilever roller and the roller shaft cooling cantilever roller are installed on the first end of the shaft. The first end of the shaft extends into the furnace together with the furnace roller, and the second end of the shaft is outside the furnace. The bearing box is connected and driven by the motor to drive the furnace roll to rotate. In order to ensure the strength of the shaft, the shaft needs to be cooled. The cooling method adopted by the above two cantilever rolls is to install a cooling water pipe inside the shaft, and through the cooling water pipe to the shaft. Cooling water...

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Problems solved by technology

[0003] However, the cantilever rollers in the above two furnaces are cooled by passing water, which will inevitably take away heat from the furnace, and form a low-temperature zone around the furnace rollers, so that the steel billet is due to the Uneven heating will cause temperature deviation in the length direction of the billet, affect product quality, and also increase the energy consumption of the heating furnace

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