Concrete mixing stations
Concrete mixing station consists of mixing console, material weighing system, material handling systems, material storage and control systems and other five major systems and other ancillary facilities components.
1. Mixer Mixer stirring their way into forced mixing concrete mixer and loader and self-loading mixing. Compulsory mixer mixing station is the main domestic and international use, it can be stirred liquidity, semi-rigid and rigid and other dry concrete. Since the fall mixing console main stirring fluidity concrete, it is rarely used in the mixing station. Compulsory mixer according to the spindle structure is divided into a planetary mixer, single horizontal shaft mixer and twin-shaft mixer. The integrated use of performance especially in the twin-shaft compulsory mixer is best. 2. Material material weighing system weighing system is affecting the quality of concrete and concrete production cost of key components, divided into aggregate weighing, weighing powder and liquid weighing three parts. Under normal circumstances, 20 cubic meters per hour or less mixing station superposition weighing methods that aggregate (sand and stone) with a pair of scales, a scale with cement and fly ash, Water and liquid additive were weighed, and then put into the water, said liquid additive premixed infighting. In more than 50 cubic meters per hour, mixing station, said the use of various materials weighing separate ways, all have adopted electronic weighing scales and computer control. Aggregate weighing accuracy ≤2%, cement, powder, water and additives weighing accuracy have reached ≤1%. 3. Material Handling material handling system consists of three parts. Aggregate conveying: conveying mixing station currently has a hopper and belt conveyor transport in two ways. Advantages bucket elevator is a small footprint, simple structure. Advantages belt conveyor is transporting distance, high efficiency, low failure rate. Conveyor belt is mainly used to aggregate the temporary storage of mixing station, mixing station to increase productivity. Powder conveying: concrete available powder mainly cement, fly ash and slag. Currently powder conveying screw conveyor is used by general transport, large mixing floor there is the use of pneumatic conveying and the AFC. Advantages of the screw conveyor is simple in structure, low cost, and reliable. Liquid delivery: mainly refers to water and liquid additives, which are respectively delivered by the pump. 4. The material storage system is basically the same concrete materials available for storage. Aggregate open dumps (and there are large-scale urban commercial concrete mixing station with a closed silo); powders with Manual brick making machinery china price fully enclosed steel silo storage; admixture steel container. 5. The control system mixing station control system is the central nervous system equipment package. Control system according to the different requirements of users and the size of the mixing station and have different functions and preparation, construction of small mixing plant control system simpler site available under normal circumstances, but the system is relatively large mixing station complex.
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