Additive metering system and metering method of cement concrete stirring device

Abstract

The invention discloses an additive metering system and a metering method of a cement concrete stirring device, the additive metering system comprises an additive liquid storage tank, a ball valve, anadditive pump, a check valve, a flow sensor, a weighing sensor, an additive weighing tank, a support of the weighing tank and a discharge pneumatic butterfly valve, and a control system is constituted by a flowmeter, a weighing instrument and a computer. The additive metering adopts the method which combines the volumetric metering with the electronic weighing metering, the two metering results are simultaneously inputted into the computer for carrying out comparison, when any metering result achieves the set value of ingredients within the set error range, the additive pump is closed. The metering method adopts the method which combines the volumetric metering with the electronic weighing metering, when the pneumatic butterfly valve below the weighing tank is not closed tightly or otherfaults occur in the system, the computer carries out the comparison treatment on output values of the volumetric metering and the electronic weighing metering, thereby automatically controlling the opening and the closing of the additive pump and further ensuring the precision of the actual amount of the ingredients of the additive.

Description

technical field [0001] The invention relates to a metering system for measuring the weight of flowing liquid, in particular to a metering system capable of more accurately measuring additives input into cement concrete mixing equipment, and belongs to the technical field of road construction machinery. Background technique [0002] In the cement concrete mixing process, although the amount of additives is relatively small, it has a great impact on the quality of cement concrete. Many construction and cement concrete pavement quality accidents are caused by inaccurate additive ingredients in cement concrete. The additive metering system of the existing cement concrete mixing equipment directly pumps the additive liquid from the liquid storage tank to the additive weighing tank through the additive pump, and then uses the weighing sensor to measure the weight of the additive input into the additive weighing tank. The signal is transmitted to the weighing instrument and compute...

AI Technical Summary

Problems solved by technology

The system and method can only be used to measure the weight of the flowing liquid that is continuously delivered, and cannot be used to measure the weight of the flowing liquid in the weighing tank that is delivered intermittently, nor can it be used to compare and calibrate the weight of the flowing liquid measured by the load cell and the digital flowmeter.

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