Sealed electric mixer

Abstract

The invention discloses a sealed electric stirrer, comprising a sealing shell, a variable frequency motor rotor, a variable frequency motor stator, an upper bearing, a lower bearing, a sealing flange, a sealing ring and a variable-frequency governor, wherein the sealing shell is cylindrical in shape, a bearing sleeve is arranged at the center of the upper end of the sealing shell, the upper bearing is arranged in the bearing sleeve, the sealing flange is arranged at the lower end of the sealing shell, the lower bearing is arranged at the center of the sealing flange, the variable frequency motor rotor is placed in the sealing shell and supported between the upper and lower bearings through a rotating shaft and can rotate freely, and a stirring blade fixture is arranged at the lower end of the rotating shaft; the sealing flange is provided with a locating counter bore and an installing through hole, the sealing ring is installed under the sealing flange in a sleeving manner and also provided with a through hole, and the side of the sealing flange is provided with a clamping rod installing hole; the outer side of the sealing shell is sleeved with the whole motor stator, a locating pin shaft is arranged at the lower end of the motor stator, the bearing sleeve is fixedly connected to the upper end of the motor stator, the bearing sleeve is sleeved with a bearing support, the variable frequency motor stator is electrically connected to the variable-frequency governor; the sealed electric stirrer meets the requirement of experimenters and engineering technicians on hermetic stirring in experiment and production processes.

Description

technical field [0001] The invention relates to experimental instruments, in particular to a sealed electric stirrer. Background technique [0002] The agitator is a liquid stirring device widely used in scientific research departments such as medical treatment, epidemic prevention, medicine, environmental protection, food, etc., as well as medical, chemical, biochemical laboratories, analysis rooms, biological and genetic laboratories of universities. Many chemical synthesis reactions involve gas, such as gas generation, one of the reactants is gas, or an inert gas needs to be used for protection. At this time, the reaction vessel is required to be sealed. Current stirrers can be divided into two categories, 1. Magnetic stirrer; 2. Electric stirrer. Although the magnetic stirrer can seal the container during the stirring process, it is only suitable for stirring liquids or solid-liquid mixtures with low viscosity due to its small stirring power; when using it, put the stir...

AI Technical Summary

Problems solved by technology

Although the magnetic stirrer can seal the container during the stirring process, it is only suitable for stirring liquids or solid-liquid mixtures with low viscosity due to its small stirring power; when using it, put the stirring bar into the liquid in the container After the stirrer generates a rotating magnetic field, the magnetic field drives the stirrer to move in a circular motion to achieve the purpose of stirring the liquid. Since the stirrer stirs at the bottom of the container, the stirring effect is not good, especially for liquids with high viscosity. Be applicable

Due to the large stirring power, the electric stirrer is suitable for a wide range of liquid viscosity, and it can be placed in the central part of the liquid with good stirring effect. However, the existing electric stirrer cannot seal the container during the stirring process, which will affect Air tightness and reaction effect of reaction vessel

[0003] The utility model with the patent number of 2012201118948 discloses a stirrer with an inert gas protection device, which can be used for sealed stirring in a chemical reaction vessel that needs to be protected with an inert gas, but it wraps the motor as a whole in a rubber sleeve, which has low power and poor rigidity , The large friction force between the motor shaft and the rubber sleeve is only suitable for the sealed stirring of small-volume experimental containers in the laboratory, such as flasks. In addition, the motor and the motor speed controller are all in the gas atmosphere in the rubber sleeve. If it is used for a reaction vessel with corrosive gases It will definitely shorten the life of the motor and the speed controller, and the versatility is poor, so it is difficult to be used in industrial production, so that its practicability is greatly reduced

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