Powder material metering and conveying device of mixing plant and control method of powder material metering and conveying device

Abstract

The invention discloses a powder material metering and conveying device of a mixing plant and a control method of the powder material metering and conveying device. The powder material metering and conveying device of the mixing plant comprises a material storage bin, a screw conveyer, a feed regulating valve, a metering hopper and a control part, wherein the screw conveyer is provided with a material inlet and a material outlet and the material inlet is connected with the material storage bin; the feed regulating valve is provided with an input end and an output end and the input end is connected with the material outlet; the metering hopper is connected with the output end; and the control part is connected with the feed regulating valve and the metering hopper and is used for receiving the metering signal of the metering hopper and controlling the feed regulating valve to adjust feed caliber. The powder material metering and conveying device of the mixing plant and the control method of the powder material metering and conveying device have the advantages that the powder materials can be rapidly conveyed, the working efficiency is high and the metering accuracy is high.

Description

technical field [0001] The invention relates to a metering and conveying device, in particular to a powder metering and conveying device of a mixing station and a control method thereof. Background technique [0002] Batching plant is common in concrete engineering, mainly used for mixing and mixing concrete, which mainly includes systems and structural components such as feeding, storage, batching and control, among which powder is involved in the system and working process of feeding and storage Material metering conveying device. [0003] Specifically, in the process of producing concrete in concrete mixing stations, powder materials such as fly ash and admixtures need to be added. These powder materials require fast input speed and high measurement accuracy requirements, and need to be measured by special mixing station powder materials. At present, two methods are mainly used for metering and conveying: one is to use a large-diameter screw conveyor to convey, although ...

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Problems solved by technology

[0003] Specifically, in the process of producing concrete in concrete mixing stations, powder materials such as fly ash and admixtures need to be added. These powder materials require fast input speed and high measurement accuracy requirements, and need to be measured by special mixing station powder materials. At present, two methods are mainly used for metering and conveying: one is to use a large-diameter screw conveyor to convey, although it can meet the fast conveying, but the large diameter of the material and the speed of the material are too fast, making it difficult to control The feeding amount and drop will cause inaccurate powder measurement and poor measurement accuracy, which will affect the accuracy of weighing and proportioning; the other is to use small-diameter screw conveyors or large-diameter screw conveyors for low-speed conveying. Although this method improves the measurement accuracy to a certain extent, the conveying speed is very low, and pulse butterfly valves are also used to ensure the accuracy, but pulse butterfly valves require frequent actions, greatly reducing the service life, low work efficiency, and improving the operation of the mixing station. cost

[0004] To sum up, the defects of the existing powder metering and conveying device of the mixing station are mainly reflected in the fast feeding speed, the feeding volume and drop are difficult to control, resulting in poor metering accuracy, large metering fluctuations, and often exceeding the standard of metering Or, the measurement accuracy has been improved, but the measurement efficiency and work efficiency are low; in addition, the butterfly valve device operates frequently, has a short service life and is prone to failure

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