CN221007471U - Full-automatic hydroxyl value tester - Google Patents
Full-automatic hydroxyl value tester Download PDFInfo
- Publication number
- CN221007471U CN221007471U CN202322864672.4U CN202322864672U CN221007471U CN 221007471 U CN221007471 U CN 221007471U CN 202322864672 U CN202322864672 U CN 202322864672U CN 221007471 U CN221007471 U CN 221007471U
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- China
- Prior art keywords
- bottle
- burette
- relay switch
- automatic
- hydroxyl value
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 title claims abstract description 20
- 238000004448 titration Methods 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 239000012780 transparent material Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 230000036541 health Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 13
- 229920000570 polyether Polymers 0.000 description 13
- 229920005862 polyol Polymers 0.000 description 9
- 150000003077 polyols Chemical class 0.000 description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The utility model discloses a full-automatic hydroxyl value tester, which comprises a titration solution bottle, a burette and a triangular bottle, wherein the triangular bottle is arranged on a magnetic stirrer, a chromaticity sensor is arranged on one side of the triangular bottle on the magnetic stirrer, and the chromaticity sensor is connected with a relay switch; the burette is provided with a micro-flow meter, the burette is connected with a titration liquid bottle through a connecting pipe, and the connecting pipe is provided with a high-precision electromagnetic valve; the micro flow meter and the high-precision electromagnetic valve are connected with a relay switch. Compared with the prior art, the full-automatic hydroxyl value tester is provided with the colorimetric sensor and the relay switch, the colorimetric sensor is used for detecting the color change in the titration process, an instruction is made according to the color change, the relay switch is controlled to be opened and closed, the high-precision electromagnetic valve and the micro-flowmeter are further controlled, and automatic titration is further achieved. The utility model has reasonable structural design, improves the working efficiency, increases the measurement precision and reduces the influence on the health of operators.
Description
Technical Field
The utility model relates to the technical field of polyether polyol sample analysis, in particular to a full-automatic hydroxyl value tester.
Background
The polyether polyol is an important chemical raw material, and the hydroxyl value of the polyether polyol (polyether for short) is one of important indexes of product specifications, can represent the content of functional groups in the polyether and the molecular weight of the polyether, has great effect in the production, application and development of the polyether, and therefore, has to be strictly controlled. There are various methods for determining the hydroxyl number of polyether polyols, the most common of which is titration. When determining the hydroxyl value of polyether polyol by titration, firstly preparing a polyether polyol sample, adding a NaOH solution into a burette for titration, observing the color change of an indicator, and calculating the hydroxyl value after stopping titration. In the titration process, the experiment personnel can contact chemicals for a long time, so that certain influence is caused on health, and in addition, the efficiency is reduced and the error is increased due to long-time operation.
Disclosure of utility model
In order to solve the technical problems, the utility model provides a full-automatic hydroxyl value tester, which has reasonable structural design, improves the working efficiency and increases the measuring precision.
In order to achieve the technical purpose, the utility model adopts the following scheme:
the full-automatic hydroxyl value tester comprises a titration liquid bottle, a burette and a triangular bottle, wherein the triangular bottle is arranged on a magnetic stirrer, a chromaticity sensor is arranged on the magnetic stirrer and positioned on one side of the triangular bottle, and the chromaticity sensor is connected with a relay switch; the liquid outlet of the burette corresponds to the bottle mouth of the triangular bottle, a micro-flow meter is arranged on the burette, the burette is connected with the burette bottle through a connecting pipe, and a high-precision electromagnetic valve is arranged on the connecting pipe; the micro flow meter and the high-precision electromagnetic valve are connected with a relay switch.
Compared with the prior art, the utility model has the beneficial effects that:
The full-automatic hydroxyl value tester is provided with the colorimetric sensor and the relay switch, the colorimetric sensor is used for detecting color change in the titration process, an instruction is made according to the color change, the relay switch is controlled to be opened and closed, and then the high-precision electromagnetic valve and the micro-flow meter are controlled, so that automatic titration is realized. The full-automatic hydroxyl value tester has reasonable structural design, improves the working efficiency, increases the measurement accuracy and reduces the influence on the health of operators.
Further, the triangular flask is made of transparent materials, and the triangular flask and the chromaticity sensor are arranged on the same horizontal plane. When the liquid to be measured in the triangular flask changes along with the titration endpoint reaching the color, the chromaticity sensor can send out a command at the same time to control the opening and closing of the relay switch.
Further, the relay switch is connected with a switch of the magnetic stirrer. After stopping titration, the magnetic stirrer switch is controlled to be turned off.
Further, a relay switch is provided inside the magnetic stirrer. The relay switch is arranged in the magnetic stirrer, so that the redundant space is not occupied, and the normal use of the magnetic stirrer is not affected.
Drawings
FIG. 1 is a schematic diagram of a fully automatic hydroxyl value analyzer according to an embodiment of the present utility model;
in the figure: 1. a magnetic stirrer; 2. a relay switch; 3. a high-precision electromagnetic valve; 4. a micro-flowmeter; 5. a chromaticity sensor; 6. a triangular flask; 7. a burette; 8. a titration solution bottle; 9. and (5) connecting pipes.
Detailed Description
The present utility model will be described in detail with reference to the following embodiments for a full understanding of the objects, features and effects of the present utility model, but the present utility model is not limited thereto.
Referring to fig. 1, the utility model provides a full-automatic hydroxyl value tester, which comprises a magnetic stirrer 1, a relay switch 2, a high-precision electromagnetic valve 3, a micro-flow meter 4, a colorimetric sensor 5, a triangular flask 6, a burette 7, a titration solution bottle 8 and a connecting pipe 9.
The triangular flask 6 and the chromaticity sensor 5 are arranged on the magnetic stirrer 1, the triangular flask 6 and the chromaticity sensor 5 are positioned on the same horizontal plane, the triangular flask 6 is made of transparent materials, the chromaticity sensor 5 is connected with the relay switch 2, and the relay switch 2 is arranged inside the magnetic stirrer 1; the liquid outlet of the burette 7 corresponds to the bottle mouth of the triangular bottle 6, the micro-flowmeter 4 is arranged on the burette 7, the burette 7 is connected with the burette bottle 8 through the connecting pipe 9, the burette bottle 8 is arranged above the burette 7, the burette enters the burette 7 from the burette bottle 8 under the action of gravity, and the high-precision electromagnetic valve 3 is arranged on the connecting pipe 9; the micro flow meter 4 and the high-precision electromagnetic valve 3 are connected with the relay switch 2, and the relay switch 2 is connected with the switch of the magnetic stirrer 1.
The working principle of the full-automatic hydroxyl value tester is as follows:
Placing a certain amount of polyether polyol sample to be detected in a triangular flask 6, dropwise adding an indicator into the triangular flask 6, starting a magnetic stirrer 1, starting a micro-flow meter 4 and a high-precision electromagnetic valve 3, enabling a titration solution to enter the triangular flask 6 from a titration solution bottle 8 sequentially through a connecting pipe 9 and a titration tube 7, starting titration, monitoring the color change of the polyether polyol in the triangular flask 6 by a colorimetric sensor 5, setting the detection range to be 0-100, setting the monitoring value at a titration end point, along with the progress of titration, changing the color of the liquid in the triangular flask 6, indicating that the titration reaches the end point, receiving a signal by the colorimetric sensor 5, sending a stop command to a relay switch 2, switching off a power supply by the relay switch 2, further controlling the high-precision electromagnetic valve 3, the micro-flow meter 4 and the magnetic stirrer 1, stopping titration, calculating the hydroxyl value of the polyether polyol to be detected according to the use amount of the titration solution, and ending the test.
Finally, it should be noted that: the above list is only a preferred embodiment of the present utility model, and it is understood that those skilled in the art can make modifications and variations thereto, and it is intended that the present utility model be construed as the scope of the appended claims and their equivalents.
Claims (3)
1. The full-automatic hydroxyl value tester comprises a titration liquid bottle (8), a burette (7) and a triangular bottle (6), and is characterized in that the triangular bottle (6) is arranged on a magnetic stirrer (1), a chromaticity sensor (5) is arranged on the magnetic stirrer (1) and positioned on one side of the triangular bottle (6), and the chromaticity sensor (5) is connected with a relay switch (2); the liquid outlet of the burette (7) corresponds to the bottle mouth of the triangular bottle (6), a micro-flow meter (4) is arranged on the burette (7), the burette (7) is connected with the burette bottle (8) through a connecting pipe (9), and a high-precision electromagnetic valve (3) is arranged on the connecting pipe (9); the micro flow meter (4) and the high-precision electromagnetic valve (3) are connected with the relay switch (2).
2. The full-automatic hydroxyl value analyzer according to claim 1, wherein the triangular flask (6) is made of transparent material, and the triangular flask (6) and the colorimetric sensor (5) are disposed on the same horizontal plane.
3. The fully automatic hydroxyl value meter according to claim 1, wherein the relay switch (2) is connected to a switch of the magnetic stirrer (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322864672.4U CN221007471U (en) | 2023-10-25 | 2023-10-25 | Full-automatic hydroxyl value tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322864672.4U CN221007471U (en) | 2023-10-25 | 2023-10-25 | Full-automatic hydroxyl value tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221007471U true CN221007471U (en) | 2024-05-24 |
Family
ID=91086954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322864672.4U Active CN221007471U (en) | 2023-10-25 | 2023-10-25 | Full-automatic hydroxyl value tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221007471U (en) |
-
2023
- 2023-10-25 CN CN202322864672.4U patent/CN221007471U/en active Active
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