Cradle stand for electrolysis cell

Abstract

The invention discloses a cradle stand for an electrolysis cell. The cradle stand comprises a bottom girder (1) at the bottom of the cradle rack, wherein a pre-stress pull rod (3) passes through and is fixed on the bottom girder (1). By applying pre-stress to the bottom girder of the cradle stand of the electrolysis cell in advance, a component combining upper pure bending force with lower pure bending force of the bottom girder of the cradle stand is stressed instead of a lower pure bending part, so that the bottom girder of the cradle stand is prevented the over deforming because of bendingof the lower side of the bottom girder, stress of a high-strength material is sufficiently played, the structure receives the pre-pressure applied by the pre-stress pull rod before the structure is subject to a loading action, the loading formed pulling stress of the bottom girder of the cradle stand caused by bending of the lower side is reduced or counteracted, the thickness of bottom girder type steel webs, height of the bottom girder and usage of flange materials at two ends are effectively reduced, and the aims of reasonable stress and less deformation are achieved.

Description

technical field [0001] The invention relates to a cradle frame structure for an electrolytic cell, belonging to the technical field of aluminum electrolytic cells. Background technique [0002] The cradle frame is the key component of electrolytic aluminum production. Modern large-scale aluminum electrolytic cells mostly use cradle-type shells, and the lower structure is mainly composed of electrolytic cell shells and a series of cradle frames. The long side load of the tank shell is mainly borne by the cradle frame. In the actual use process, it is found that the bowing deformation of the bottom of the tank shell directly affects the working capacity of the tank shell. The main reason for the arching deformation at the bottom of the electrolytic cell shell is that as the electrolytic cell starts to operate, the temperature at the bottom of the cell rises, and under the action of expansion stress absorbed by the inner liner, welding internal stress and thermal stress, the c...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a cradle frame for an electrolytic cell, which has a simple structure and reliable operation, can improve the mechanical performance of the cradle frame and the interior of the electrolytic cell, and at the same time greatly reduce the cost of the electrolytic cell to overcome the The arching deformation at the bottom of the tank shell caused by the expansion of the tank shell in the prior art causes a large shear force and bending moment at the end of the cradle frame, and shearing and tearing damage occur at the root of the cradle frame.

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