Premixing device for rubber powder modified asphalt

Abstract

A premixing device for rubber powder modified asphalt comprises an inner stirring barrel and an outer stirring barrel which are vertically nested. A stirring shaft is arranged along the central axis of the inner stirring barrel, paddle stirrers and turbine stirrers are arranged on the stirring shaft at intervals, and the top end of the stirring shaft is connected with a motor upwards through a transmission shaft, a coupler and a reducer in sequence; a matrix asphalt inlet and a rubber powder inlet are formed in the upper portion of the inner stirring barrel, and a rubber asphalt discharging port is formed in the bottom of the outer stirring barrel; a plurality of long-strip mixing holes are formed in the inner stirring barrel, an anchor stirrer is arranged in the outer stirring barrel andconnected with the bottom end of the stirring shaft, cleaning brushes are installed on the anchor stirrer and fit the inner wall of the outer stirring barrel, a filter plate is arranged above the rubber asphalt discharging port, a spill preventing device is arranged at the upper portion of the outer stirring barrel, and damping units are installed on the outer bottom surface of the outer stirringbarrel for supporting. The premixing device can fully stir and mix rubber powder and asphalt and has the spill preventing and damping functions.

Description

technical field [0001] The invention belongs to the field of asphalt processing, in particular to a premixing device for rubber powder modified asphalt. Background technique [0002] In recent years, with the needs of the development of the national economy, my country's traffic construction has developed rapidly, and high-grade roads have been rapidly upgraded. So far, most of the high-grade roads that have been opened to traffic are asphalt roads. In order to prevent the early failure of asphalt pavement, using high-quality modified asphalt to improve the quality of asphalt mixture and prolong the service life of pavement has become one of the advanced technologies that are currently valued at home and abroad. Rubber-modified asphalt has excellent fatigue resistance and low-temperature crack resistance. Its waste tires contain natural rubber, synthetic rubber, sulfur, carbon black and other components, which are good modifiers for road asphalt. The addition of rubber powde...

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Problems solved by technology

[0003] However, there is no unified national standard for the production equipment of rubber powder modified asphalt, and most of them are designed and modified by enterprises themselves, and there are certain defects: agglomeration, floating, sinking, sticking to the wall and hanging material are very easy to occur in the premixing equipment Phenomena such as rubber powder particles cannot be fully contacted and mixed with matrix asphalt, which affects the physical and chemical reactions between the two, the mixing effect of the two is poor, and it is difficult to produce high-quality rubber asphalt; there is no anti-overflow device, and premixing equipment is in During the working process, the phenomenon of "upwelling" is easy to occur, causing the tank to overflow, and the asphalt temperature is high, which is easy to endanger the personal safety of the construction personnel on site, and also causes waste of materials; the premixing equipment will vibrate during work, on the one hand Noise will be generated, on the other hand, it will affect the life of the equipment

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