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Laboratory stirrer

A stirrer and laboratory technology, applied in the direction of mixer accessories, mixers with rotating stirring devices, chemical instruments and methods, etc., can solve the problems of low stirring efficiency, difficulty in mixing materials uniformly, increasing body resistance, etc., and achieve improvement Mixing effect, improvement of mixing efficiency, cost saving effect

Active Publication Date: 2020-12-11
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, magnetic stirrer and paddle stirrer are most commonly used. Magnetic stirrer has low noise and is flexible and convenient to use. Paddle stirrer has simple structure and strong stirring power. However, when it is necessary to stir non-Newtonian fluid with high viscoelasticity, With the continuous addition of powder, the viscosity of the fluid increases, and the entrained air enters the fluid during the addition process, which is easy to form air bubbles and has a negative impact on the uniformity of fluid mixing. If a magnetic stirrer is used, the stirring power of the magnet is insufficient and the stirring efficiency is low. , the material is difficult to mix evenly, and the mixing effect is poor. If a paddle agitator is used, the stirring force can be improved by increasing the diameter of the paddle or increasing the number of paddles, but increasing the diameter of the paddle will increase the body resistance and power The consumption is greatly increased, and the use of multiple blades will complicate the structure of the device and increase the cost of use

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0049] Such as Figure 1 to Figure 5 As shown, the laboratory stirrer according to Embodiment 1 of the present invention includes a horizontally installed fixed plate 400, a bracket 410 connected to both ends of the fixed plate 400, and a bottom plate 420 arranged at the bottom of the bracket 410. Between the bracket 410 and the bottom plate 420 A fixed backing plate 430 is arranged between them, ribs 431 are arranged on both sides of the bottom of the bracket 410, a loading cup 440 is placed on the bottom plate 420, and a number of adjustment holes 411 are pierced through the bracket 410, and adjustment pins 412 run through the adjustment holes 411. The pin 412 abuts against the bottom surface of the fixing plate 400 .

[0050] The fixing plate 400 is connected with the servo motor 110, the fixing plate 400 is perforated with a plurality of connecting holes 401, the connecting holes 401 are penetrated with bolts 402, the top of the servo motor 110 is provided with a connectin...

Embodiment 2

[0052] Such as Figure 6 As shown, compared with the first embodiment, the guide surface 310 of the floating member 300 is provided with a pointed head 311, which is arranged between adjacent exhaust channels 320, and the pointed point is downward. When stirring, the pointed head 311 It can assist stirring to further improve the mixing effect.

Embodiment 3

[0054] Such as Figure 7 As shown, compared with the first embodiment, the exhaust passage groove 320 on the guide surface 310 is arranged as an arc-shaped groove.

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Abstract

The invention discloses a laboratory stirrer which comprises a stirring shaft which is connected with a servo motor for driving the stirring shaft to rotate at a variable speed; a turntable which is arranged at the tail end of the stirring shaft; and a floating part which sleeves the stirring shaft in a sliding mode and is provided with a guide face shrinking towards the center of the floating part from top to bottom. According to the scheme, the servo motor drives the turntable to rotate at a variable speed, a non-Newtonian fluid is driven to do circular motion in the rotating direction, anddue to the viscoelasticity of the non-Newtonian fluid, normal stress exists between the floating part and the turntable, a secondary flow vortex is generated, resultant force formed by upward thrust generated by the normal stress, buoyancy of the fluid and gravity of the floating part drives the floating part to move up and down along the stirring shaft, the secondary flow vortex moves up and downalong with the floating part and acts together with circular motion, so that the mixing effect is improved, and the stirring efficiency is improved. Few accessories are involved, the structure is optimized, and the cost is saved.

Description

technical field [0001] The invention relates to the technical field of test equipment, in particular to a laboratory stirrer. Background technique [0002] The agitator is one of the commonly used equipment in the laboratory. It realizes the mixing of materials. It is mainly used to prepare solutions, suspensions and emulsions, and to prevent material precipitation. At present, magnetic stirrer and paddle stirrer are most commonly used. Magnetic stirrer has low noise and is flexible and convenient to use. Paddle stirrer has simple structure and strong stirring power. However, when it is necessary to stir non-Newtonian fluid with high viscoelasticity, With the continuous addition of powder, the viscosity of the fluid increases, and the entrained air enters the fluid during the addition process, which is easy to form air bubbles and has a negative impact on the uniformity of fluid mixing. If a magnetic stirrer is used, the stirring power of the magnet is insufficient and the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F7/26B01F15/00B01F27/93
CPCB01F27/93B01F35/43
Inventor 徐百平李秋霞喻慧文张志旋梁勇肖书平
Owner WUYI UNIV