Trace material metering control equipment, metering system, engineering machinery and method

Abstract

The invention discloses trace material metering control equipment, a metering system, engineering machinery and a method. The equipment includes: a receiving device used for receiving a weighing value from a weighing hopper used for weighing the weight of a material in the weighing hopper in real time to obtain the weighing value; and a control device used for controlling by stages the running speed at which the material in the weighing hopper is put into a feeding screw of a mixing host machine, the control by stages including buffering control, and the weighing value being the weight of the material put into the mixing host machine through the feeding screw. According to the trace material metering control equipment provided by the invention, the running speed of the feeding screw is controlled by stages according to the weighing value, and buffering control is set in the control by stages, and thus trace material can be metered with high precision and fed.

Description

technical field [0001] The invention relates to micro-material metering technology, in particular to a micro-material metering control device, a metering system, engineering machinery and a method. Background technique [0002] The specific gravity of trace materials in dry-mixed mortar is generally 0.3 kg / ton to 0.5 kg / ton, and the amount of each input is about 0.6 kg to 1.5 kg, and the requirement for the measurement accuracy of such trace materials is within 1 % or less, that is, the error does not exceed ±10 grams. At present, most of the control methods for measuring trace materials adopt the method of metering screw combined with electronic batching scale or manual feeding, but this method will bring problems such as long metering cycle and low precision, and manual feeding has high labor intensity, serious dust, issues affecting health. [0003] In the metering system, the metering accuracy is mainly guaranteed by controlling the feeding screw. Usually, the frequenc...

AI Technical Summary

Problems solved by technology

At present, most of the control methods for measuring trace materials adopt the method of metering screw combined with electronic batching scale or manual feeding, but this method will bring problems such as long metering cycle and low precision, and manual feeding has high labor intensity, serious dust, issues affecting health

[0003] In the metering system, the metering accuracy is mainly guaranteed by controlling the feeding screw. Usually, the frequency conversion control is used for the control of the feeding screw. However, for the metering of trace materials, the feeding screw needs to be designed very small, which will inevitably affect the production efficiency.

Moreover, the feeding screw also has a vibration effect on the weighing system during operation, so that it is impossible to achieve accurate measurement of trace materials

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