CN205909895U - Automatic constant volume device - Google Patents
Automatic constant volume device Download PDFInfo
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- CN205909895U CN205909895U CN201620672075.9U CN201620672075U CN205909895U CN 205909895 U CN205909895 U CN 205909895U CN 201620672075 U CN201620672075 U CN 201620672075U CN 205909895 U CN205909895 U CN 205909895U
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- sensor
- liquid level
- constant volume
- volumetric flask
- analysis
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Abstract
The utility model relates to an agricultural product quality safety short -term test technical field discloses an automatic constant volume device, including volumetric flask, burette, sensor and analysis controller, the burette is equipped with and drips fast control unit, the sensor is including first sensor that detect to titrate a liquid level in the in -process volumetric flask in volumetric flask liquid level's second sensor when being used for detecting final constant volume, the analysis controller with first, second sensor reaches and drips the connection of fast control unit electricity. The utility model discloses send a signal to the assay controller when first sensor detects a liquid level arrival liquid level, the control of assay controller is dripped a fast control unit and is slowed down constant volume speed, when the second sensor detects the final constant volume liquid level of liquid level arrival volumetric flask, sends a signal to the assay controller, and the control of assay controller is dripped a fast control unit and is stopped the constant volume to realize automatic constant volume. The utility model discloses can strengthen the objectivity and the accuracy of constant volume operation.
Description
Technical field
The utility model is related to agricultural product quality and safety rapid detection technical field, particularly to a kind of automatic constant volume dress
Put.
Background technology
In Modern Analytical Chemistry, constant volume is one of the most frequently used basic operation.So-called constant volume, refers to joining using volumetric flask
When putting actual concentrations solution, add water from master scale line also have 1 to 2 centimetres when, with dropper water suction dropwise instill volumetric flask
In, sight line and concave meniscus lowest part mutually level so as to reach the process tangent with graduation mark.The order of accuarcy of constant volume operation is direct
It is related to precision of analysis.
Whether traditional constant volume operation needs operating personnel's concave meniscus that detects by an unaided eye tangent with master scale line, exists relatively
Big individual subjective error, affected by many factors such as the observation habit of operator, operating habit, light intensities it is difficult to
Ensure to complete at short notice the constant volume operation of high accuracy.
As can be seen here, be independent of operator's subjective factor automatic volume fixing device become analysis work in constant volume operate urgently
Problem to be solved.
Utility model content
(1) technical problem to be solved
The purpose of this utility model is to provide a kind of automatic volume fixing device, and mainly for solving, constant volume operation is excessive to rely on behaviour
Author's subjective factor leads to the inaccurate problem of constant volume.
(2) technical scheme
In order to solve above-mentioned technical problem, the utility model provides a kind of automatic volume fixing device, including volumetric flask, dropper,
Sensor and analysis and Control instrument,
Described dropper is provided with and drips fast control parts, and the bottleneck that the dropper mouth of described dropper is arranged on described volumetric flask is just gone up
Side, described sensor includes detecting in titration process in volumetric flask the first sensor of the first liquid level and is used for measurement capacity
The second sensor of final constant volume liquid level in bottle, wherein said first liquid level is less than final constant volume liquid level；
Described analysis and Control instrument is electrically connected with the fast control parts of dripping of described first sensor, second sensor and dropper
Connect, when first sensor detection liquid level reaches the first liquid level, described first sensor sends letter to described analysis and Control instrument
Number, drip fast control parts described in described analysis and Control instrument control system and slow down constant volume speed, second sensor detection liquid level reaches final
During constant volume liquid level, described second sensor to described analysis and Control instrument sending signal, described in described analysis and Control instrument control system
Drip fast control parts and stop constant volume.
Further, described first sensor and second sensor are electric transducer or micropressure sensor, described first
Sensor and described second sensor are arranged on the inside of described volumetric flask by support.
Further, described first sensor and second sensor are laser sensor, described first sensor and second
Sensor is arranged on the outside of described volumetric flask.
Further, it is provided with what analysis and Control instrument was connected with described first sensor and second sensor in described support
Cable conductor.
Further, described first sensor is fixedly connected with described support, and described second sensor is by adjustable height
The fixture of degree is connected with described support.
Further, described height-adjustable fixture is adjustable screw.
Further, described volumetric flask is marked with master scale line.
Further, the rational height of described first sensor is concordant with described master scale line.
Further, it is provided with chemical inertness insulating barrier outside described first sensor, second sensor and its cable conductor.
(3) beneficial effect
The automatic volume fixing device that the utility model provides, by arranging the liquid level position of liquid in sensor measurement capacity bottle
Put, and by analysis and Control instrument, a fast control parts for sensor and dropper are carried out chain: after constant volume starts, first sensor
Detection liquid level reaches the first liquid level to described analysis and Control instrument sending signal, and described analysis and Control instrument passes through to control a speed control
Part processed slows down constant volume speed, and when second sensor detects that liquid level reaches final constant volume, the liquid level of volumetric flask is to described analysis
Controller sending signal, described analysis and Control instrument control system is dripped fast control parts and is stopped constant volume.The utility model can achieve solution certainly
Move quick constant volume, operating efficiency and the detection work accuracy of capacity analysis can be effectively improved.
Brief description
Fig. 1 is the schematic diagram of the utility model automatic volume fixing device embodiment；
Fig. 2 is the partial enlarged drawing of Fig. 1.
In figure, 1: volumetric flask, 11: master scale line；
2: dropper, 21: controlling switch；
31: first sensor, 32: second sensor；
4: support；5: adjustable screw；
61: wire, 62: wire；
7: analysis and Control instrument；8: constant volume concave meniscus.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Example is used for the utility model is described, but is not limited to scope of the present utility model.
Embodiment 1
As shown in figure 1, the present embodiment automatic volume fixing device with the liquid of constant volume in volumetric flask for routine can conducting liquid be
Example illustrates.
The present embodiment automatic volume fixing device includes volumetric flask 1, dropper 2, first sensor 31, second sensor 32, analysis
Measurement and control instrument 7.Described volumetric flask is marked with master scale line 11, and the dropper mouth of described dropper 2 is correspondingly arranged at described volumetric flask bottle
The surface of mouth, described dropper 2 is provided with the controlling switch 21 controlling dropper rate of titration；Described analysis and Control instrument 7 is respectively
Electrically connected by the controlling switch 21 of cable conductor 62,61 and dropper 2, first sensor 31 and second sensor 32.
Due in volumetric flask constant volume be can conducting liquid it is possible to first sensor and second sensor can adopt
Electric transducer, the principle of described electric transducer be by circuit after solution connection conduction to judge whether liquid level has arrived at predetermined
Position.As a kind of alternative embodiment of the present utility model, as shown in figure 1, described first sensor 31, second sensor 32 are equal
It is arranged in described volumetric flask by support 4, and press close to the bottle wall setting of volumetric flask.Described first sensor 31 is fixed on support
4 determination position, the horizontal plane of the corresponding master scale line 11 of body of first sensor 31 being fitted by the position of adjusting bracket
Highly arrange；Described second sensor 32 is arranged on described support 4 by adjustable screw 5 is adjustable, described second sensing
After device 32 is fixing, its highly with liquid capacity-fixed to normal capacity when, in corresponding volumetric flask, liquid is contacted with volumetric flask inwall
Liquid level around side highest point position highly consistent.For the liquid of general aspects, meeting due to due to liquid tension
Assume concave meniscus, liquid capacity-fixed to normal capacity refer to liquid levels reach constant volume concave meniscus 8, namely in volumetric flask liquid recessed
Liquid level minimum point is concordant with master scale line 11 tangent, and side around liquid level now, that is, it is attached at the position of volumetric flask inwall
Put, at this, the height of liquid level can be slightly higher than master scale line, so second sensor 32 needs body setting and highest
Liquid level is concordant.
Cable conductor for linking parsing measurement and control instrument 7 and first sensor 31, second sensor 32 is optionally arranged on
Inside support 4, it is provided with outside described first sensor 31, second sensor 32 and its cable conductor and does not occur with configured solution
The chemical inertness insulating barrier of chemical reaction.So both can simplify the setting of cable conductor and support, electricity can also be avoided simultaneously
The damage of cable wire.
The present embodiment automatic volume fixing device, before constant volume starts, the master scale line 11 of volumetric flask 1 is nearby dried, then
Support 4 is inserted in volumetric flask, first sensor 31 body of fitting is transferred to the position alignd with master scale line 11, is used in combination
Second sensor 32 is adjusted to constant volume concave meniscus 8 (constant volume concave meniscus: when constant volume completes, in liquid level in volumetric flask by adjustable screw 5
The concave meniscus lowest part tangent liquid level concordant with master scale line in portion) be affixed on volumetric flask inwall liquid level extreme higher position (this
Individual position is that the distance between first sensor 31 and second sensor 32 are according to institute by testing the experience height drawing at ordinary times
The concentration of configuration solution, institute considered using the concrete condition of the factors such as the property of solvent and environment temperature after setting).Sensing
Device is connected with analysis and Control instrument 7 via the cable conductor in support and wire 61, and analysis and Control instrument 7 is via wire 62 and dropper control
System switch connects.After constant volume starts, after liquid level reaches first sensor 31, now only the highest liquid level of liquid to up to standard
Quasi- graduation mark position, this positional distance master scale line corresponding standard constant volume liquid level also has certain distance, first sensor 31
Testing circuit conducting is detected and at once send signal to described analysis and Control instrument 7, analysis and Control instrument 7 controls the controlling switch of dropper
21 slow down constant volume speed；After liquid level reaches second sensor 32, now in volumetric flask, concave meniscus lowest part has reached and standard
Graduation mark 11 concordantly tangent corresponding normal capacity (i.e. standard constant volume) position, after second sensor 32 detects circuit conductive
At once send signal to described analysis and Control instrument 7, analysis and Control instrument 7 controls dropper controlling switch 21 to cut out, and stops constant volume, this
When, constant volume operation is automatically performed.
The utility model can achieve solution quick constant volume automatically, can effectively improve operating efficiency and the detection work of capacity analysis
Make the degree of accuracy.
The present embodiment be directed to volumetric flask in institute's constant volume solution be can conducting liquid, can using volumetric flask built-in circuit connect
Mode (i.e. electric transducer) detection liquid level；When being non-conducting solution for the solution of institute's constant volume in volumetric flask, can adopt
The built-in micropressure sensor of volumetric flask or other can detect the sensor of liquid level；It is strong for constant volume in volumetric flask
When corrosivity, strong oxidizing solution, the external laser sensor of volumetric flask can be adopted；It is the liquid of meniscus for constant volume liquid level,
Can be by the liquid level root of first sensor, the set location of second sensor and first sensor, second sensor detection
Adjust accordingly according to actual conditions.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all this
Within the spirit of utility model and principle, any modification, equivalent substitution and improvement made etc., should be included in the utility model
Protection domain within.
Claims (9)
1. a kind of automatic volume fixing device is it is characterised in that include volumetric flask, dropper, sensor and analysis and Control instrument,
Described dropper is provided with and drips fast control parts, and the dropper mouth of described dropper is arranged on directly over the bottleneck of described volumetric flask,
Described sensor includes detecting in titration process in volumetric flask the first sensor of the first liquid level and is used for measurement capacity bottle
The second sensor of interior final constant volume liquid level, wherein said first liquid level is less than final constant volume liquid level；
Described analysis and Control instrument is electrically connected with the fast control parts of dripping of described first sensor, second sensor and dropper, the
When one sensor detection liquid level reaches the first liquid level, described first sensor is to described analysis and Control instrument sending signal, institute
State a fast control parts described in analysis and Control instrument control system and slow down constant volume speed, second sensor detection liquid level reaches final constant volume liquid
During the height of face, described second sensor is to described analysis and Control instrument sending signal, a speed control described in described analysis and Control instrument control system
Part processed stops constant volume.
2. automatic volume fixing device as claimed in claim 1 is it is characterised in that described first sensor and second sensor are electricity
Sensor or micropressure sensor, described first sensor and described second sensor are arranged on described volumetric flask by support
Internal.
3. automatic volume fixing device as claimed in claim 1 is it is characterised in that described first sensor and second sensor are sharp
Optical sensor, described first sensor and second sensor are arranged on the outside of described volumetric flask.
4. automatic volume fixing device as claimed in claim 2 is it is characterised in that be provided with analysis and Control instrument and institute in described support
State the cable conductor that first sensor and second sensor connect.
5. automatic volume fixing device as claimed in claim 2 is it is characterised in that described first sensor is fixed with described support
Connect, described second sensor is connected with described support by height-adjustable fixture.
6. automatic volume fixing device as claimed in claim 5 is it is characterised in that described height-adjustable fixture is to adjust spiral shell
Rotation.
7. automatic volume fixing device as claimed in claim 1 is it is characterised in that described volumetric flask is marked with master scale line.
8. automatic volume fixing device as claimed in claim 7 it is characterised in that the rational height of described first sensor with described
Master scale line is concordant.
9. the automatic volume fixing device as described in any one of claim 1～8 it is characterised in that described first sensor, second biography
It is provided with chemical inertness insulating barrier outside sensor and its cable conductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620672075.9U CN205909895U (en) | 2016-06-29 | 2016-06-29 | Automatic constant volume device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620672075.9U CN205909895U (en) | 2016-06-29 | 2016-06-29 | Automatic constant volume device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205909895U true CN205909895U (en) | 2017-01-25 |
Family
ID=57813185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620672075.9U Expired - Fee Related CN205909895U (en) | 2016-06-29 | 2016-06-29 | Automatic constant volume device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205909895U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113180478A (en) * | 2021-04-21 | 2021-07-30 | 深圳拓邦股份有限公司 | Liquid flow detection method and device and electrical equipment |
-
2016
- 2016-06-29 CN CN201620672075.9U patent/CN205909895U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113180478A (en) * | 2021-04-21 | 2021-07-30 | 深圳拓邦股份有限公司 | Liquid flow detection method and device and electrical equipment |
| CN113180478B (en) * | 2021-04-21 | 2023-02-03 | 深圳拓邦股份有限公司 | Liquid flow detection method and device and electrical equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170125 Termination date: 20210629 |