A special-shaped pipe wall screw conveyor

Abstract

The invention relates to a spiral conveyer with special pipe walls. The spiral conveyer comprises a horizontal conveying tube, a spiral propeller horizontally and coaxially arranged in a cavity of the conveying tube, a material inlet communicated with the upper portion at one end of the conveying tube, a material outlet communicated with the lower portion at the other end of the conveying tube, and a motor in power connection with one end of the conveying tube close to the material inlet. The conveying tube comprises a small-diameter section cavity, a transition section cavity and a large-diameter section cavity which are sequentially connected, and the internal diameters of the small-diameter section cavity, the transition section cavity and the large-diameter section cavity gradually increase from the material inlet to the material outlet. The section of the small-diameter section cavity is cylindrical, the section of the transition section cavity is in the shape of a cone with big belly and small mouth, the section of the upper portion of the large-diameter section cavity is in the shape of a semicircle, and the section of the lower portion of the large-diameter section cavity is in the shape of a semiellipse. The spiral propeller comprises a rotating shaft and spiral blades. The spiral blades are in a uniform pitch and variable diameter mode, and gaps are reserved between the spiral blades and the inner walls of the large-diameter section cavity and the small-diameter section cavity. The spiral conveyer with the special pipe walls can achieve continuous pulseless feeding and can reduce influence on feeding caused by discharging impact.

Description

technical field [0001] The invention relates to a conveyor, in particular to a special-shaped tube-wall screw conveyor for conveying powder. Background technique [0002] Powder usually refers to an aggregate of discrete particles with a particle size of less than 1 mm. The raw materials and fuels of cement production, metallurgy, thermal power plants and pulverized coal industrial boiler industries are powder bodies. In the process of conveying powder, the conveyor should ensure stable feeding and have a certain wind-locking effect. Therefore, screw conveyors are often used because they not only have a reasonable screw shaft structure, good sealing performance, and stable conveying speed, but also It can also reduce suspension and reduce overshoot. [0003] The structure of the currently used screw conveyor is mainly in the following two forms: 1) equal diameter, variable pitch; 2) equal pitch, variable diameter. These two types of screw conveyors artificially increase t...

AI Technical Summary

Problems solved by technology

However, the screw conveyors with the above two structural forms have the following two disadvantages: 1) they cannot continuously feed materials without pulsation, and in practical applications, they can realize the feeding of one lead per revolution, that is, intermittent feeding; 2) ) After long-term use, the friction and wear between the pipe wall and the spiral blade and the powder body will cause the gap between the pipe wall and the spiral blade to become larger, thus affecting the discharge and air lock

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