Stirrer driving rod

Abstract

The invention discloses a stirrer which comprises a driving motor, wherein a driving end is arranged at the lower part of the driving motor; a driving rod is connected to the lower part of the driving end; stirring paddles are arranged on the driving rod; the driving rod consists of an upper driving rod and a lower driving rod; the upper driving rod and the lower driving rod are connected by virtue of a coupling part and transfer a torque; the rotating direction of the lower driving rod is changed to be opposite to that of the upper driving rod by virtue of the coupling part. According to the stirrer, the shear force is increased, a coaxial stirring paddle is additionally arranged on the basis of a single-blade straight stick stirrer, the stirring paddles are arranged in an angle of 90 degrees at intervals, and the shear force is greatly improved, so that fluid in a wider range is pushed by the stirrer, fluctuation of the fluid is accelerated, a mixed reaction can be promoted by speed fluctuation of the fluid, the shear force is enhanced due to stirring of the upper and lower stirring paddles in the opposite directions, a phenomenon that solid particles are deposited on the wall of a reaction tank due to annular flow of the single-blade straight stick stirring is effectively relieved, a dead zone in the reaction tank is reduced, and full operations of the processes such as mixing, dispersing, heat transferring and reacting are promoted.

Description

[0001] The patent application of the present invention is a divisional application of the invention-creation name "a kind of agitator". The application date of the original application is November 7, 2013, and the application number is 2013105482824. technical field [0002] The invention relates to a stirring device in the chemical industry, in particular to a stirrer. Background technique [0003] At present, there are different agitators used in the chemical production industry. Among them, the single-blade straight stick agitator is widely used due to its simple structure, low production cost, and convenient maintenance. Disadvantages: First, the shear force is small. Due to the small shear force of the single-blade agitator, the effect of the annular flow is obvious, and the longitudinal flow and tangential flow are relatively weakened. This "swirling" phenomenon is likely to cause the deposition of raw materials on the wall of the reaction tank, resulting in the loss o...

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Problems solved by technology

[0003] At present, there are different agitators used in the chemical production industry. Among them, the single-blade straight stick agitator is widely used due to its simple structure, low production cost, and convenient maintenance. Disadvantages: 1. The shear force is small. Due to the small shear force of the single-blade agitator, the annular flow effect is obvious, and the longitudinal flow and tangential flow are relatively weakened.

This "swirling" phenomenon is easy to cause the deposition of raw materials on the wall of the reaction tank, resulting in the loss of raw materials

At the same time, the dead zone in the tank will greatly affect the reaction effect and product quality; 2. Insufficient reaction, the range of single-blade stirring to promote fluid movement in the reaction tank is small, the fluctuation is weak, and the phenomenon of up and down circulation is not obvious, which easily leads to uneven mixing and affects the reaction. full progress of the process

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