CN209311388U - The device for fast detecting of acid value in a kind of food - Google Patents
The device for fast detecting of acid value in a kind of food Download PDFInfo
- Publication number
- CN209311388U CN209311388U CN201822232231.1U CN201822232231U CN209311388U CN 209311388 U CN209311388 U CN 209311388U CN 201822232231 U CN201822232231 U CN 201822232231U CN 209311388 U CN209311388 U CN 209311388U
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- China
- Prior art keywords
- injection
- bracket
- tube
- chip microcontroller
- acid value
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Abstract
The utility model relates to a kind of device for fast detecting of acid value in food, device for fast detecting includes bracket and sample bottle, bracket is equipped with pH electrode, hold the first injection-tube of diluent, it holds the second injection-tube of alkaline solution and holds the third injection-tube of grease to be detected, push rod is provided in each injection-tube, mandril and driving cylinder are equipped with above each push rod on bracket, each mandril is towards being provided with pressure sensor on the end face of push rod, the device for fast detecting further includes single-chip microcontroller and the display that connect with single-chip microcontroller, pH electrode and each pressure sensor are connect with single-chip microcontroller acquisition signal, each driving cylinder is connect with monolithic machine control signal, communication link is connected to host computer on single-chip microcontroller.Volumetric quantities are converted to the displacement of the push rod in each injection-tube by single-chip microcontroller, can be accurately controlled the volume of the alkaline solution of instillation, without manually carrying out control titration, using multiple microtitration after preliminary titration, finally determine titration end-point according to pH electrode.
Description
Technical field
The utility model relates to test experience apparatus fields, and in particular to the device for fast detecting of acid value in a kind of food.
Background technique
Acid value refers to the content of free fatty acid in vegetable oil, with milligram number (the mg KOH/ of every gram of coil neutralization potassium hydroxide
G) it indicates.Detection acid value can reflect grease whether acid and rancid degree, if having used rancid grease that can cause poisoning
Symptom.
Existing food is when carrying out acid value detection, such as the application for a patent for invention that application publication number is 105424872 A of CN
Disclosed detection method is crushed and is screened first to food, by extracting grease in extraction kettle, using titration pair
Acid value carries out detection calculating.Existing titration method mostly uses greatly manual titration mode to carry out titration detection, and phenolphthalein is added and refers to
Show liquid, the variation for observing by the naked eye solution colour carries out the judgement of pH value, and artificial eye is needed to be read out titration examination
The volume of agent.Error is brought first is that observing by the naked eye solution colour and manually reading, second is that having done repeated detection
Body and naked eyes can all occur tired out afterwards, dizzy problem occur, very big challenge is brought to the body of testing staff.
Utility model content
The purpose of the utility model is to provide a kind of detection accuracy, and high, acid value in food easy to use quick detection fills
It sets.
To achieve the above object, the device for fast detecting of acid value uses following technical side in a kind of food of the utility model
Case: the device for fast detecting of acid value in a kind of food, including bracket and sample bottle, it is useful in the setting of the top of sample bottle on bracket
In detection sample bottle the pH electrode of the current potential of solution, hold the first injection-tube of diluent, hold the second note of alkaline solution
Pipe and the third injection-tube for holding grease to be detected are penetrated, is provided with push rod in each injection-tube, in each push rod on bracket
Top is provided with the driving cylinder of mandril for pressing push rod and driving mandril movement, and each mandril is towards setting on the end face of push rod
Be equipped with pressure sensor, which further includes single-chip microcontroller and the display that connect with single-chip microcontroller, the pH electrode with
And each pressure sensor is connect with single-chip microcontroller acquisition signal, each driving cylinder is connect with monolithic machine control signal, is led on single-chip microcontroller
Letter is connected with host computer.
Agitating device is provided on the bracket, agitating device includes the mounting rod being rotatably dispose on bracket and is connected to
Stirring rod on mounting rod, the end of stirring rod are provided with stirring blade, and the stirring of driving mounting rod rotation is provided on bracket
Driving motor.
Guiding movement is equipped with mounting rack, pH electrode, agitating device, the first injection-tube, the second note up and down on the bracket
It penetrates pipe and third injection-tube is all set on mounting rack, the mounting rack driving dress that driving mounting rack moves up and down is provided on bracket
It sets.
The mounting rack driving device includes the shaft being rotatably dispose on bracket, has thread segment, mounting rack in shaft
It is threadedly connected on the thread segment of shaft, mounting rack driving device further includes the shaft driving motor of drive shaft rotation.
Ultrasonic generator is provided with below the sample bottle, the upper end of ultrasonic generator is provided with for supplying
The placing groove that sample bottle is placed.
The temperature sensor for detecting solution temperature in sample bottle, temperature sensor and list are additionally provided on the bracket
Piece machine acquires signal connection.
The utility model has the beneficial effects that titration end-point is determined by the current potential of solution in pH electrode detection sample bottle,
Color change without phenolphthalein indicator in artificial eye observation experiment bottle is judged, the accuracy of experiment is substantially increased；
Each driving cylinder is controlled by single-chip microcontroller first and adjusts the distance between mandril and push rod, when pressure sensor has initial setting value
When, show that mandril has been contacted with push rod at this time.Diluent, the grease, alkalinity of initial setting are transmitted from host computer to single-chip microcontroller
Volumetric quantities are converted to the displacement of the push rod in each injection-tube by single-chip microcontroller by the volumetric quantities signal of solution, can be accurate
The volume for controlling the alkaline solution instilled, without manually carrying out control titration, using multiple microtitration after preliminary titration,
Titration end-point is finally determined according to pH electrode.Above-mentioned apparatus eliminates artificial eye and judges the color of solution and manually read,
The accuracy of experiment can be greatly improved, and easy to use, save manpower.
Detailed description of the invention
Fig. 1 is the structural representation in a kind of food of the utility model in one embodiment of the device for fast detecting of acid value
Figure.
Specific embodiment
The embodiment of the device for fast detecting of acid value in a kind of food of the utility model, as shown in Figure 1, including bracket 1
With sample bottle 15, bracket 1 includes bottom plate 21, and guiding movement is equipped with mounting rack 2 above and below the top of sample bottle on bracket 1, props up
The mounting rack driving device that driving mounting rack 2 moves up and down is provided on frame 1.Mounting rack driving device includes being rotatably dispose in branch
Shaft 3 on frame 1 has thread segment in shaft 3, and mounting rack 2 is threadedly connected on the thread segment of shaft 3, mounting rack driving dress
Set further include drive shaft rotation shaft driving motor 4.The current potential for detecting solution in sample bottle is provided on mounting rack 2
PH electrode 16, hold diluent the first injection-tube 5, hold the second injection-tube 6 of alkaline solution and to be detected for holding
The third injection-tube 7 of grease, diluent uses ethyl alcohol-diethyl ether solution in the present embodiment, and alkaline solution is molten using potassium hydroxide
Liquid.
It is provided with push rod 24 in each injection-tube, is provided in the top of each push rod 24 for pressing push rod on bracket 2
The driving cylinder 9 that 24 mandril 8 and driving mandril 8 moves up and down, driving cylinder use high-precision Numeric hydraulic cylinder.Each mandril direction
Pressure sensor 10 is provided on the end face of push rod, which further includes single-chip microcontroller 18 and connect with single-chip microcontroller aobvious
Show that device 19, pH electrode 16 and each pressure sensor 10 acquire signal with single-chip microcontroller 18 and connect, each driving cylinder 9 and single-chip microcontroller 18
Signal connection is controlled, communication link is connected to host computer 20 on single-chip microcontroller.It is additionally provided on mounting rack 2 for stirring solution in sample bottle
Agitating device, agitating device includes the mounting rod 11 being rotatably dispose on bracket 1 and the stirring rod being connected on mounting rod 11
13, the end of stirring rod 13 is provided with stirring blade 22, and the stirring driving motor of driving mounting rod rotation is provided on mounting rack 2
12。
Be additionally provided with the temperature sensor 17 for detecting solution temperature in sample bottle on bracket 2, temperature sensor 17 with
Single-chip microcontroller 18 acquires signal connection, and the acid value in grease is generally weak acid, and degree of ionization is influenced by temperature weak acid in the solution,
Therefore it needs the temperature to solution in sample bottle to monitor in real time, is further ensured that the accuracy of detection.In examination on bottom plate 21
The lower section of sample bottle 15 is provided with ultrasonic generator 14, and the upper end of ultrasonic generator 14 is provided with for putting for sample bottle
The placing groove 23 set to the pH electrode in sample bottle and can be stirred after finishing detection test by ultrasonic generator
It mixes stick and stirring blade is cleaned, and do not have to disassemble pH electrode and stirring rod and stirring blade after having tested every time
It is cleaned, it is time saving and energy saving.
The device for fast detecting of the utility model when in use, first by smashing, screening and extracts food to be detected
It takes and extracts grease in kettle, which is drawn using third injection-tube and head bubble is discharged be placed on mounting rack, using second
Injection-tube draws potassium hydroxide solution and head bubble is discharged and is placed on mounting rack, draws ethyl alcohol-second using the first injection-tube
Ethereal solution is simultaneously discharged head bubble and is placed on mounting rack；Reagent bottle is placed on bottom plate, up and down adjustment is controlled by single-chip microcontroller
The position of mounting rack sends the volume command of grease and diluent injection by host computer to suitable position, and passes through stirring dress
It sets stirring while carrying out temperature detection.When titration starts, the body of the alkaline solution of initial setting is transmitted from host computer to single-chip microcontroller
Volumetric quantities are converted to the displacement of the push rod in third injection-tube by single-chip microcontroller, are stirred while carrying out by product value signal
Temperature measurement finally determines titration using multiple microtitration after preliminary titration according to the current potential of pH electrode detection solution
Terminal, in constant-current titration, titration end-point can use maximum-slope method, first-order derivative method, and the methods of second derivative method determines,
And will not be described here in detail.The acid value (in terms of potassium hydroxide) that grease to be measured is calculated finally is carried out, unit is every gram of milligram (mg/
G).After the completion of detection starting ultrasonic generator in sample bottle pH electrode and stirring rod and stirring blade carry out it is clear
It washes, and does not have to disassemble pH electrode and stirring rod and stirring blade after having tested every time to clean, it is time saving and energy saving.
In the other embodiments of the utility model, potassium hydroxide solution can also be replaced by sodium hydroxide solution；It can also
To be not provided with sensor, screw releasable connection can will be passed through together between push rod and mandril at this time, at this time push rod and mandril
Between fluted and connection styletable is set, above-mentioned screw is set on the cell wall of groove.
Claims (6)
1. the device for fast detecting of acid value in a kind of food, it is characterised in that: including bracket and sample bottle, in sample bottle on bracket
Top be provided with pH electrode for detecting the current potential of solution in sample bottle, the first injection-tube for holding diluent, hold alkali
Property solution the second injection-tube and third injection-tube for holding grease to be detected, be provided with push rod in each injection-tube, prop up
The mandril for pressing push rod and the driving cylinder of driving mandril movement, each mandril direction are provided on frame above each push rod
It is provided with pressure sensor on the end face of push rod, which further includes single-chip microcontroller and the display that connect with single-chip microcontroller
Device, the pH electrode and each pressure sensor are connect with single-chip microcontroller acquisition signal, each driving cylinder and monolithic machine control signal
It connects, communication link is connected to host computer on single-chip microcontroller.
2. the device for fast detecting of acid value in food according to claim 1, it is characterised in that: be provided on the bracket
Agitating device, agitating device include the mounting rod being rotatably dispose on bracket and the stirring rod that is connected on mounting rod, stirring rod
End be provided with stirring blade, be provided on bracket driving mounting rod rotation stirring driving motor.
3. the device for fast detecting of acid value in food according to claim 2, it is characterised in that: led up and down on the bracket
Mounting rack is installed to movement, pH electrode, agitating device, the first injection-tube, the second injection-tube and third injection-tube are all set in
The mounting rack driving device that driving mounting rack moves up and down is provided on mounting rack, on bracket.
4. the device for fast detecting of acid value in food according to claim 3, it is characterised in that: the mounting rack driving dress
The shaft including being rotatably dispose on bracket to be set, there is thread segment in shaft, mounting rack is threadedly connected on the thread segment of shaft,
Mounting rack driving device further includes the shaft driving motor of drive shaft rotation.
5. according to claim 1 in food described in any one of -4 acid value device for fast detecting, it is characterised in that: the examination
Ultrasonic generator is provided with below sample bottle, the upper end of ultrasonic generator is provided with puts for what is placed for sample bottle
Set slot.
6. the device for fast detecting of acid value in food according to claim 1, it is characterised in that: also set up on the bracket
There is the temperature sensor for detecting solution temperature in sample bottle, temperature sensor is connect with single-chip microcontroller acquisition signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822232231.1U CN209311388U (en) | 2018-12-28 | 2018-12-28 | The device for fast detecting of acid value in a kind of food |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822232231.1U CN209311388U (en) | 2018-12-28 | 2018-12-28 | The device for fast detecting of acid value in a kind of food |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209311388U true CN209311388U (en) | 2019-08-27 |
Family
ID=67679616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822232231.1U Expired - Fee Related CN209311388U (en) | 2018-12-28 | 2018-12-28 | The device for fast detecting of acid value in a kind of food |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209311388U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110487675A (en) * | 2019-08-29 | 2019-11-22 | 新疆中泰纺织集团有限公司 | The method of viscose ripening degree detection device and detection viscose ripening degree |
| CN112255284A (en) * | 2020-10-12 | 2021-01-22 | 徐睿琦 | Edible oil acid value detection device and application thereof |
| CN116381128A (en) * | 2023-05-29 | 2023-07-04 | 安徽三杨食品有限公司 | Fried food acid value index sampling detection device |
-
2018
- 2018-12-28 CN CN201822232231.1U patent/CN209311388U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110487675A (en) * | 2019-08-29 | 2019-11-22 | 新疆中泰纺织集团有限公司 | The method of viscose ripening degree detection device and detection viscose ripening degree |
| CN112255284A (en) * | 2020-10-12 | 2021-01-22 | 徐睿琦 | Edible oil acid value detection device and application thereof |
| CN116381128A (en) * | 2023-05-29 | 2023-07-04 | 安徽三杨食品有限公司 | Fried food acid value index sampling detection device |
| CN116381128B (en) * | 2023-05-29 | 2023-08-11 | 安徽三杨食品有限公司 | Fried food acid value index sampling detection device |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190827 Termination date: 20211228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |