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    • 3. 发明公开
    • Method of and system for controlling the mixing of concrete
    • Verfahren und System zurÜberwachungdes Mischungsvorganges von Beton。
    • EP0126573A1
    • 1984-11-28
    • EP84303018.0
    • 1984-05-04
    • Ready Mixed Concrete (United Kingdom) Limited
    • Durant, Alan Sidney James
    • B28C1/12
    • B28C5/422B28C7/022B28C7/026G05D24/02
    • © Concrete is mixed in a mechanical mixer which is preferably a rotating mixer drum carried on a truck, in accordance with a predetermined formulation requiring a theoretical quantity of water to achieve a predetermined workability by adding to the mixer with the solid constituents a pretedermined fraction of the theoretical quantity of water. The workability of the mix is then measured and compared with the predetermined workability to derive a measure of the additional water required to bring the workability up to the predetermined workability. There is then added to the mix a further quantity of water which does not exceed the derived measure of additional water and which preferably corresponds to the lesser of the derived measure of additional water and the balance of the theoretical value. A monitoring unit associated with the mixer monitors the workability of the mix and the speed of operation of the mixer and identifies these values through a communications link to a control apparatus which controls the loading of the solid constituents and the delivery of water to the mixer and which incorporates a memory which stores data identifying the theoretical amount of water for a given formulation and data identifying the additional amount of water required to increase the workability from one value to another, means for inhibiting loading of the solid constituents to the mixer until the speed of operation of the mixer has attained a pre-set value, means for delivering the predetermined fraction of water to the mixer, means for identifying from the measured workability of the mix and the predetermined value of workability the additional amount of water and for delivering such additional amount of water to the mix.
    • 将混凝土混合在机械混合器中,该机械混合器优选地是在卡车上承载的旋转混合器滚筒,根据需要理论量的水的预定配方,通过向混合器中加入固体成分以预定的部分 理论水量。 然后测量混合物的可加工性,并将其与预定的可加工性进行比较,以得出使加工性达到预定可加工性所需的附加水的量度。 然后向混合物中加入更多量的水,其不超过附加水的衍生量,并且其优选对应于额外水的衍生测量值的较小值和理论值的平衡。 与混合器相关联的监测单元监测混合物的可操作性和混合器的操作速度,并且通过与控制装置的通信链路来识别这些值,控制装置控制固体成分的加载和将水输送到混合器, 其包含存储用于识别给定制剂的理论水量的数据的存储器,以及识别将加工性从一个值增加到另一个值所需的附加量的数据的数据,用于抑制将固体成分负载到混合器直到速度 混合器的操作已经达到预设值,用于将预定部分的水输送到混合器的装置,用于根据所测量的混合物的可加工性和预定的可加工性值来识别附加量的水并用于输送 额外添加量的水混合。