A sealing system for a distributor using cross rollers

Abstract

The invention relates to a sealing system of a material distributor adopting crossed wheels. The sealing system comprises a material distributor shell and a rotation cylinder. A labyrinth seal gap is arranged at the joint of the material distributor shell and the lower portion of the rotation cylinder. The sealing system comprises the crossed wheels fixed to the lower portion of the material distributor shell. The crossed wheels are located on the outer side of the rotation cylinder and correspond to gaps in position. Each crossed wheel comprises a y-direction crossed wheel body and an x-direction crossed wheel body which are perpendicular to each other. By means of the crossed wheels, the problem of shaking of the rotation cylinder is solved, and uniform stress of each crossed wheel can be achieved. By means of reduction of shaking of the rotation cylinder, the labyrinth seal gap can be greatly reduced, and the sealing performance of the material distributor to blast furnace gas is obviously improved.

Description

technical field [0001] The invention relates to the technical field of blast furnace top equipment, and more specifically relates to a sealing system of a distributor using cross rollers. Background technique [0002] Blast furnace ironmaking is currently the main means of obtaining pig iron in my country. The distributor is the key equipment on the roof of the ironmaking blast furnace. Its function is to arrange the charge in the blast furnace according to the process requirements. Most of the existing distributors are through the distribution chute. The function of the distributor is realized by two movements of rotation and tilting. The chute is suspended on the rotating cylinder. The rotating cylinder of the distributor is basically only suspended by the upper slewing bearing. Due to the clearance of the slewing bearing or the bearing, the lower part of the rotating cylinder will inevitably shaking problem. For large distributors, due to the high height of the rotating cy...

AI Technical Summary

Problems solved by technology

[0002] Blast furnace ironmaking is currently the main means of obtaining pig iron in my country. The distributor is the key equipment on the roof of the ironmaking blast furnace. Its function is to arrange the charge in the blast furnace according to the process requirements. Most of the existing distributors are through the distribution chute. The function of the distributor is realized by two movements of rotation and tilting. The chute is suspended on the rotating cylinder. The rotating cylinder of the distributor is basically only suspended by the upper slewing bearing. Due to the clearance of the slewing bearing or the bearing, the lower part of the rotating cylinder will inevitably shaking problem

For large distributors, due to the high height of the rotating cylinder, the small clearance of the upper slewing bearing or bearing will cause a lot of shaking in the lower part of the rotating cylinder, and the shaking of the rotating cylinder will lead to inaccurate positioning of the distribution chute As a result, the cloth is inaccurate, and at the same time, it will rub against the refractory materials and other parts around the cylinder. In addition, due to the relative movement between the rotating cylinder of the distributor and the housing of the distributor, in order to prevent the contact between the rotating cylinder and the housing of the distributor Due to the jamming between them, they cannot be completely sealed, and because the sloshing of the rotating cylinder is relatively large, the existing technology is mainly to set a labyrinth seal with a large gap between the rotating cylinder and the housing of the distributor. Taking a 3000 cubic meter blast furnace as an example, the minimum gap of the labyrinth seal of the distributor used is generally about 12mm, so the sealing effect is very unsatisfactory. The distributor is in direct contact with the blast furnace gas, and the blast furnace gas has high temperature, much dust and is harmful to the human body. Disadvantages, therefore, it is very important to minimize blast furnace gas entering the distributor shell

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