Extrusion type powder continuous metering device

Abstract

The invention discloses an extrusion type powder continuous metering device. The extrusion type powder continuous metering device comprises a rack, a weighing screw conveyer, a transition bin, a variable-frequency screw conveyer, a weighing sensor, an impeller feeder, an intermediate bin and a pneumatic arch breaking device. A discharge port of the variable-frequency screw conveyer is connected with a feed port of the weighing screw conveyer, a feed port of the impeller feeder is connected with a discharge port of the transition bin, and a discharge port of the impeller feeder is connected with a feed port of the variable-frequency screw conveyer through the intermediate bin. The variable-frequency screw conveyer comprises a conveying pipe provided with a feed port and a discharge port, a screw shaft and a damping feeding blade disc arranged in the conveying pipe, and a motor for driving the screw shaft to rotate. The screw shaft comprises a first spiral section away from the discharge port of the conveying pipe and a second spiral section close to the discharge port of the conveying pipe. The thread pitch of the first spiral section is larger than that of the second spiral section. The damping feeding blade disc is arranged at the tail of the second spiral section, and powder is conveyed to the discharge port of the conveying pipe through the damping feeding blade disc. The pneumatic arch breaking device is arranged in the transition bin.

Description

technical field [0001] The invention relates to a powder continuous metering device, in particular to an extruding powder continuous metering device. Background technique [0002] The continuous powder metering and conveying device for traditional stabilized soil, continuous cement concrete and asphalt concrete mixing equipment is composed of a transition warehouse with frequency conversion screw conveyor and a set of weighing screw conveyor to complete the powder continuous metering work. Traditional The structure can realize continuous metering, but due to the poor stability of the feeding material, the metering accuracy is much greater than 5%, which makes the metering unstable and fluctuates greatly, which affects the quality of the finished material, and will directly lead to serious engineering quality problems. [0003] Chinese patent No. 200920014863.9 utility model patent discloses a double-screw scale, which adopts a double-helix structure, its feeding screw motor ...

AI Technical Summary

Problems solved by technology

Although the double-screw scale structure has a metering function, it cannot achieve accurate quantitative feeding

A lot of practice has shown that in order for the double-screw scale to be able to accurately and stably feed materials continuously, the feeding material flow of the frequency conversion conveying screw machine must be relatively stable first, and the material filling coefficient of the frequency conversion conveying screw machine changes too much during the conveying process, which is affected by the material frame of the transition warehouse. There are many factors affecting the smoothness of feeding and the level of material level, and frequency conversion alone cannot solve the purpose of stable feeding

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