Continuous-type cement metering device

Abstract

A continuous-type cement metering device comprises a metering screw, a metering screw driving motor, a feeding rotary valve, a feeding rotary valve driving motor, an industrial control computer, a feeding rotary valve frequency converter and a weight sensor. The continuous-type cement metering device is characterized in that the pulling-type weight sensor is connected with the meter screw in a hanging manner, the industrial control computer is connected with a programmable logic controller (PLC) electrically, the signal input end of the programmable logic controller (PLC) is connected with an encoder arranged at a shaft end of the metering screw electrically, and the signal output end of the programmable logic controller (PLC) is connected with the metering screw through a metering screw frequency converter, and is connected with the feeding rotary valve frequency converter and the feeding rotary valve driving motor electrically and sequentially. The continuous-type cement metering device has the advantages of small size, light weight, high metering accuracy, good versatility, reliable performances, and convenience in maintenance and usage, and requirements for China highways can be met.

Description

technical field [0001] The invention relates to the metering field, and relates to a continuous cement metering device. Background technique [0002] With the continuous improvement of road construction requirements in our country, the cement volume measurement method of the original stabilized soil mixing equipment has not met the requirements of batching accuracy, so as figure 1 The existing continuous cement metering system shown has been widely used in stabilized soil equipment. In the existing continuous cement metering device, the metering accuracy of the metering screw has exceeded ±5%, which cannot meet the standard requirement within ±2%. Existing continuous cement metering devices exist: 1) The self-heavy weight of the device usually weighs 300 kg, which exceeds the best range ratio in the metering system; For the pressure sensor in the device, the mechanical vibration (changes with the load) caused by its rotation number is irregular. When it responds to the ele...

AI Technical Summary

Problems solved by technology

In the existing continuous cement metering device, the metering accuracy of the metering screw has exceeded ±5%, which cannot meet the standard within ±2%.

Existing continuous cement metering devices exist: 1) The self-heavy weight of the device usually weighs 300 kg, which exceeds the best range ratio in the metering system; For the pressure sensor in the device, the mechanical vibration (changes with the load) caused by its rotation number is irregular. When it responds to the electrical signal, the disturbance is particularly large. No matter which filtering method is used, it cannot be extracted. Accurate weight signals lead to serious errors beyond the range; 3) All signals of the metering part are transmitted to the industrial computer. The anti-interference ability is very poor

All in all, the existing continuous cement metering device has unreasonable structure, large volume, heavy weight, and poor metering accuracy, which cannot meet the requirements of road construction

And so far there is no literature record to overcome the above-mentioned shortcoming, solve the existing problems, the report and practical application of the continuous cement metering device of the new structure

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