Continuous feeding system for dispersion and accurate measurement of powder for production of rubber powder modified asphalt

Abstract

The invention relates to a continuous feeding system for dispersion and accurate measurement of powder for production of rubber powder modified asphalt, which comprises a rubber powder conveyer and a storage bin, and is characterized in that a feeding mechanism is a spiral spring; a feed delivery pipe is made of a high polymer self-lubricating material; a feeding motor is a variable frequency motor; level gauges are arranged on the side wall of the storage bin; the storage bin is connected with a distributing device for accurate measurement and dispensing of the rubber powder; the distributing device mainly comprises a square cylinder-shaped shell open at top and bottom, a metering roll, a bearing seat and a rotating shaft; the distributing device is connected with a beating crusher for finely breaking the rubber powder; the beating crusher mainly comprises a square cylinder-shaped shell open at top and bottom, a steel tooth beating rod and a bearing seat; and the variable frequency motor, an upper limit level gauge, a lower limit level gauge, a stepping motor and a beating motor are connected with an automatic control system. The invention has the advantages of improving the production efficiency and product quality, saving manpower, ensuring continuous stable production of a reaction kettle, and adapting to application of the automatic control system.

Description

technical field [0001] The invention relates to an auxiliary system used in the production of rubber powder modified asphalt, in particular to a system for dispersing and accurately measuring continuous feeding of material powder for rubber powder modified asphalt production which is suitable for automatic control. Background technique [0002] Rubber powder modified asphalt is a new road pavement material made from base asphalt and waste tire rubber powder. It is suitable for laying various grades of highway pavement, which comprehensively improves the low-temperature elongation, crack resistance, wear resistance, heat aging resistance and oil resistance stability of the pavement, and can reduce driving noise and improve driving comfort and safety. The large temperature range provides flexibility and fatigue resistance for the asphalt pavement, thereby prolonging the service life of the pavement. At the same time, resources are recycled and environmental protection is prom...

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Problems solved by technology

[0003] At present, the production process of rubber powder modified asphalt is still in the semi-automatic or manual intermittent production mode. The feeding process of rubber powder is mainly based on the amount of rubber powder required for different products, and the raw rubber powder is directly transported to the storage bin through the rubber powder screw conveyor mechanism. Then put it into the reaction kettle, the conveying and feeding device has the following defects: (1) the particle size of waste tire rubber powder is 30 mesh-40 mesh, due to the moisture contained in it, it will cause agglomeration and agglomeration during its production, transportation and storage, Using the existing screw conveying mechanism to transport, not only can’t break the agglomeration, but the secondary extrusion in the screw conveying mechanism will aggravate the agglomeration of the rubber powder, so that when the agglomerated rubber powder is put into the reaction kettle and mixed with high-temperature asphalt, It is quickly wrapped by asphalt, causing agglomeration, increasing the difficulty of mixing, and prolonging the follow-up process time; (2) the existing feeding device is intermittent feeding, without automatic material level control device, which does not meet the requirements of automatic control of continuous production; ( 3) In the existing production, the rubber powder is measured by the number of bags packed, the dosage is inaccurate, the accuracy is poor, the consumption of manpower is large, and it is put into the kettle in a centralized manner, and the feeding is uneven, which directly affects the stability of product quality

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