CN206613444U - A kind of magnetic stir bar - Google Patents
A kind of magnetic stir bar Download PDFInfo
- Publication number
- CN206613444U CN206613444U CN201720122469.1U CN201720122469U CN206613444U CN 206613444 U CN206613444 U CN 206613444U CN 201720122469 U CN201720122469 U CN 201720122469U CN 206613444 U CN206613444 U CN 206613444U
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- China
- Prior art keywords
- stirring
- installing pipe
- stirrer
- stir bar
- magnetic stir
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Abstract
The utility model is related to a kind of magnetic stir bar.The stirrer includes：Hollow installing pipe, the magnet for being fixedly mounted on installing pipe inside center, pass through spring and two stirring cores installed in the two ends of installing pipe respectively；The end for stirring core is crown in ellipsoid, and the bottom of stirring core is in cylinder and stretched into installing pipe.The magnetic stir bar that the utility model is provided, using elastic connection, the size of stirrer is determined by rotary speed, when liquid viscosity is larger, rotary speed is slow, then stirring core extension elongation is small, as speed increases, stirring core gradually stretches out, so as to expand the scope of stirring, increase the dynamics and intensity of stirring significantly, thus avoid because from rotary resistance caused by large scale stirrer it is big, stir uneven from small size stirrer the drawbacks of considerably increase the mixing quality and mixing evenness of material to be mixed.Its is simple in construction, easy to make, can be completed by mould integrated injection molding, cost of manufacture is relatively low.
Description
Technical field
The utility model is related to a kind of stirrer, specifically a kind of to be used for magnetic stirring apparatus in chemistry or biology laboratory
Stirrer.
Background technology
Chemistry and Bioexperiment during, magnetic stirring apparatus be chemistry or Bioexperiment during through commonly used instrument
Device, stirrer is then that it is put into the force application part that stirring action is played in vessel.The operation principle of magnetic stirring apparatus follows the storehouse of magnetic
Logical sequence law, magnetic stir bar is the agitating device by magnetic stirring apparatus field drives.Have in magnetic stirring apparatus one it is rotatable
Magnet, when in magnetic stirring apparatus magnet rotate when magnetic stir bar will be driven to rotate, so as to reach the purpose of stirring.
The stirrer that existing magnetic stir bar is generally used at present is all the rotatable magnetic of a fixed size
Rotor, it is in stirring movement, and material can follow magnetic stir bar to rotate simultaneously, and the shortcoming of this stirrer is in stirring viscosity
During larger liquid, mixing effect is poor, and agitated liquid is difficult to stir evenly.And magnetic stirrer to the mixing effect of material except container is big
Small, liquid is how many and viscosity influences the outer size for additionally depending on magnetic stirrer axial dimension, the axial chi in identical sample
Very little big magnetic stirrer mixing effect is preferable.But the excessive magnetic stirrer that necessarily increases of magnetic stirrer axial dimension
Rotary resistance unfavorable mixing effect, therefore the magnetic stirrer of selection proper axial size is relatively stranded for a user on the contrary
It is difficult.
The content of the invention
The utility model proposes a kind of magnetic stir bar of telescopically adjustable length.
In order to solve the above-mentioned technical problem, the utility model proposes technical scheme be：A kind of magnetic stir bar, including：
Hollow installing pipe, the magnet for being fixedly mounted on the installing pipe inside center, respectively by spring with being installed installed in described
Two stirring cores at the two ends of pipe；The end of the stirring core is crown in ellipsoid, and the bottom of the stirring core is in cylinder and stretched
Enter in the installing pipe.
Such scheme, which is further improved, to be：The installing pipe, the outer surface of stirring core are coated with polytetrafluoroethylene floor.
Such scheme, which is further improved, to be：The surface of the polytetrafluoroethylene floor of the stirring core end in shape of threads or
Ring grain shape.
Such scheme, which is further improved, to be：The length that the stirring core is stretched into the installing pipe can be 1 to 15
Freely change between centimetre.
The magnetic stir bar that the utility model is provided, using elastic connection, the size of stirrer is determined by rotary speed, when
When liquid viscosity is larger, rotary speed is slow, then stirring core extension elongation is small, as speed increases, and stirring core gradually stretches out, so that
The scope of stirring is expanded, the dynamics and intensity of stirring are increased significantly, so as to avoid caused by from large scale stirrer
Rotary resistance is big, from the stirring of small size stirrer it is uneven the drawbacks of considerably increase the mixing quality of material to be mixed and stir
Mix the uniformity.Its is simple in construction, easy to make, can be completed by mould integrated injection molding, cost of manufacture is relatively low.
Brief description of the drawings
Fig. 1 is one preferred embodiment structural representation of the utility model.
Label is schematically as follows in figure：1- installing pipes, 2- stirring cores, 3- magnets, 4- springs.
Embodiment
Embodiment
The magnetic stir bar that the present embodiment is provided, such as Fig. 1, including：Hollow installing pipe 1, it is fixedly mounted in installing pipe 1
The magnet 3 at portion center, two stirring cores 2 for passing through two ends of the spring 4 with being arranged on installing pipe 1 respectively；The end of stirring core 2 is in
Ellipsoid is crown, and the bottom of stirring core 2 is in cylinder and stretched into installing pipe 1.
Installing pipe 1 is integrated injection molding with stirring core 2, and wherein magnet 3 is directly enclosed in installing pipe 1.
In order to reduce adhesion, be easy to cleaning, installing pipe 1 and the outer surface of stirring core 2 are coated with polytetrafluoroethylene floor.More enter
One step, the surface of the polytetrafluoroethylene floor of stirring core 1 end is in shape of threads or ring grain shape, will quickly and efficiently can so be glued
The solid sample for being attached to flask inwall is scraped off, and material recovery rate is high.
The length that stirring core 2 is stretched into installing pipe 1 freely changes between 1 to 15 centimetres.So, the stirring core 2 at two ends
28cm alterable length can be provided altogether.Other sizes are such as needed, then manufacture various sizes of installing pipe 1 and stirring core 2.
During work, stirrer initial rotation speed is slower, and stirring core 2 pulls retraction by spring 4, and stirrer length is short, stirs
The end for mixing core 2 is crown in ellipsoid, and resistance is smaller, so, and stirring rotor speed improves fast；With the raising of stirring rotor speed, stir
Core 2 is mixed due to centrifugal action, is gradually stretched out, stirrer is progressively longer, the column part of stirring core 2 starts to stretch out, and stirrer turns
Speed improves slack-off, the final stable state until reaching.
So, in stirrer size hour, agitation liquid volume is small, and the increase of liquid rotating speed is fast, stirs rotor speed increase
It hurry up, when stirrer becomes large-sized, agitation liquid volume follows increase, and the increase of liquid rotating speed is slow, and stirring rotor speed increase also becomes
Slowly.Thus overcome the problem of same size stirrer is difficult to stir.
The utility model is not limited to the concrete technical scheme of above-described embodiment, in addition to the implementation, the utility model
There can also be other embodiment, be the protection domain of the utility model requirement.
Claims (4)
1. a kind of magnetic stir bar, it is characterised in that including：Hollow installing pipe, it is fixedly mounted in the installing pipe inside
The magnet of the heart, two stirring cores for passing through two ends of the spring with being arranged on the installing pipe respectively；The end of the stirring core is in
Ellipsoid is crown, and the bottom of the stirring core is in cylinder and stretched into the installing pipe.
2. magnetic stir bar as claimed in claim 1, it is characterised in that：The installing pipe, the outer surface of stirring core are coated with
Polytetrafluoroethylene floor.
3. magnetic stir bar as claimed in claim 2, it is characterised in that：The table of the polytetrafluoroethylene floor of the stirring core end
Face is in shape of threads or ring grain shape.
4. magnetic stir bar as claimed in claim 1, it is characterised in that：The length that the stirring core is stretched into the installing pipe
Can freely it change between 1 to 15 centimetres.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720122469.1U CN206613444U (en) | 2017-02-10 | 2017-02-10 | A kind of magnetic stir bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720122469.1U CN206613444U (en) | 2017-02-10 | 2017-02-10 | A kind of magnetic stir bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206613444U true CN206613444U (en) | 2017-11-07 |
Family
ID=60230522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720122469.1U Active CN206613444U (en) | 2017-02-10 | 2017-02-10 | A kind of magnetic stir bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206613444U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113546565A (en) * | 2021-07-20 | 2021-10-26 | 南京工业大学 | Mesoscopic magnetic stirrer and preparation method thereof |
| CN113717303A (en) * | 2021-08-23 | 2021-11-30 | 绍兴市科宏仪器有限公司 | Preparation method of polytetrafluoroethylene stirrer |
| CN113750881A (en) * | 2021-10-18 | 2021-12-07 | 钻技(大连)科技有限公司 | Self-balancing magnetic stirring rod |
-
2017
- 2017-02-10 CN CN201720122469.1U patent/CN206613444U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113546565A (en) * | 2021-07-20 | 2021-10-26 | 南京工业大学 | Mesoscopic magnetic stirrer and preparation method thereof |
| CN113717303A (en) * | 2021-08-23 | 2021-11-30 | 绍兴市科宏仪器有限公司 | Preparation method of polytetrafluoroethylene stirrer |
| CN113750881A (en) * | 2021-10-18 | 2021-12-07 | 钻技(大连)科技有限公司 | Self-balancing magnetic stirring rod |
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