Automatic stirring device and automatic temperature measuring system based on naphthalene crystallization point

Abstract

The utility model belongs to the field of chemical equipment discloses an automatic stirring device and automatic temperature measurement system based on naphthalene crystallization point. Including temperature sensor, temperature sensor fixed base, reagent container fixing frame, reagent container, slide rail, motor shaft, stirring swing bar, reagent container mounting bracket, stirring support plate, shell, temperature sensor rack. The utility model has realized the automation and intelligentization of naphthalene crystallization point determination, improved the determination efficiency and accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of chemical equipment, specifically relating to an automatic stirring device and an automatic temperature measuring system based on the crystallization point of naphthalene. Background Technology

[0002] Naphthalene, as an important basic raw material in organic chemicals, is widely used in dyes, resins, pharmaceuticals, and other fields. Its purity directly affects the quality of downstream products. In the current standard GB / T 3069.2-2014, the determination of the crystallization point of naphthalene is the core indicator for evaluating the purity of industrial naphthalene, and this parameter has important guiding significance for production process control.

[0003] Traditional methods for determining naphthalene rely heavily on manual operation: the sample is placed in a test tube and then in a constant temperature bath. The operator must continuously stir the sample manually while visually observing the crystallization process with a thermometer. When the first crystals appear, the highest thermometer reading is immediately recorded as the crystallization point. This method has the following significant drawbacks:

[0004] 1. Challenges in Operational Consistency: The stirring intensity and frequency rely entirely on the operator's experience. Differences in stirring intensity between different operators or even in multiple experiments by the same operator can lead to varying crystallization nucleation rates, thus affecting the measurement results. Experimental data shows that manual stirring can cause crystallization point fluctuations of up to ±0.3℃.

[0005] 2. Observational system error: Crystallization determination relies on the timing of the first crystal appearance observed by the human eye, which introduces subjective judgment bias. Especially in the initial stage of solution turbidity change (when the crystal particle size is about 5-10 μm), visual identification has a significant lag.

[0006] 3. Limitations in temperature measurement accuracy: Ordinary glass thermometers have a minimum scale division of 0.1℃, resulting in parallax errors during reading. Furthermore, existing automatic temperature measurement devices are susceptible to disturbances during crystallization point determination, leading to unstable contact between the thermocouple measuring end and the crystal, causing temperature jumps in the data acquisition.

[0007] 4. Efficiency bottleneck: Single sample testing requires full-time monitoring, with a typical testing cycle of approximately 30 minutes. For batch testing scenarios, the laboratory needs to have multiple operators working in parallel, resulting in high labor costs. Utility Model Content

[0008] To overcome the shortcomings of existing technologies, this utility model provides an automatic stirring device and an automatic temperature measurement system based on the naphthalene crystallization point, thereby realizing the automation and intelligence of naphthalene crystallization point determination and improving the efficiency and accuracy of determination.

[0009] The above-mentioned objective of this utility model is achieved through the following technical solution: an automatic stirring device based on the crystallization point of naphthalene, comprising an outer shell with an inclined surface, a motor shaft on the inclined surface of the outer shell, the outer shell being rotatably connected to a stirring rod via the motor shaft, a slider on the stirring rod being slidably connected to a horizontal empty rail on a stirring tray, the side of the stirring tray being slidably connected to the slide rail on the inclined surface of the outer shell, a reagent container mounting bracket being fixedly mounted on the stirring tray, a reagent container fixing bracket being provided on the reagent container mounting bracket, a reagent container being movably clamped by the reagent container fixing bracket, a temperature sensor fixing seat being provided at the upper end of the reagent container, and a temperature sensor penetrating into the interior of the reagent container being provided on the temperature sensor fixing seat.

[0010] Furthermore, a temperature sensor placement rack is provided on the side of the outer casing for placing the temperature sensor after it has been extracted from the reagent container.

[0011] Furthermore, the reagent container holder specifically includes a reagent container support, a reagent container fixing block between the reagent container support and the reagent container, and a reagent container moving block. A fixing spring is also provided between the reagent container moving block and the reagent container support.

[0012] In a further preferred embodiment of this invention, the reagent container support is provided with a magnet, and the reagent container fixing frame is connected to the reagent container mounting frame via the magnet.

[0013] Furthermore, the temperature sensor is connected to a control unit via a data cable.

[0014] Furthermore, the control unit includes:

[0015] Data acquisition module: Used to acquire temperature signals output by the temperature sensor.

[0016] Data processing module: Used to process and analyze the collected temperature data to determine the crystallization point of naphthalene.

[0017] Control output module: Used to control the start / stop and stirring speed of the stirring mechanism based on the analysis results of the data processing module.

[0018] Furthermore, the control unit is also connected to a terminal output, which includes a display module and an alarm module for displaying temperature data and alarm information.

[0019] Another objective of this invention is to protect an automatic temperature measurement system for naphthalene crystallization point, including the aforementioned automatic stirring device based on naphthalene crystallization point, and a computer connected to the control unit. The computer is also connected to a printer. The computer is used to receive, store, and process temperature data and generate temperature-time curves. The printer is used to print temperature-time curves and test reports.

[0020] The advantages of this utility model compared with the prior art are:

[0021] 1. The determination of naphthalene crystallization point has been automated and intelligentized, improving the efficiency and accuracy of the determination.

[0022] 2. The use of high-precision temperature sensors and advanced control algorithms ensures the reliability of measurement results.

[0023] 3. Simple structure, easy operation, and easy maintenance. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] Figure 1 This is a schematic diagram of the automatic stirring device based on the crystallization point of naphthalene according to this utility model;

[0026] Figure 2 This is a schematic diagram of the reagent container fixing frame and reagent container mounting frame of the automatic stirring device based on the crystallization point of naphthalene according to this utility model.

[0027] In the diagram: 1. Temperature sensor; 2. Temperature sensor mounting bracket; 3. Reagent container mounting bracket; 4. Reagent container; 5. Slide rail; 6. Motor shaft; 7. Stirring lever; 8. Reagent container mounting bracket; 9. Stirring tray; 10. Housing; 11. Temperature sensor placement bracket; 12. Data cable; 13. Control unit; 14. Terminal output; 15. Reagent container fixing block; 16. Reagent container support; 17. Fixing spring; 18. Reagent container moving block; 19. Magnet. Detailed Implementation

[0028] The present invention is described in detail below through specific embodiments, but this does not limit the scope of protection of the present invention. Unless otherwise specified, the experimental methods used in the present invention are all conventional methods, and the experimental equipment, materials, reagents, etc. used can all be obtained commercially.

[0029] Example 1

[0030] like Figure 1As shown, the automatic stirring device for naphthalene crystallization point of the present invention includes a reagent container 4, a stirring mechanism, a temperature sensor 1, a temperature sensor mounting base 2, a reagent container mounting frame 3, a control unit 13, and a terminal output 14. The reagent container 4 is used to hold the naphthalene sample to be tested. The reagent container 4 is placed on the reagent container mounting frame 3, and then the reagent container mounting frame 3 is installed on the reagent container mounting bracket 8. Starting the motor control button drives the stirring lever 7 to move the stirring tray 9 and the reagent container mounting frame 3, thereby stirring the naphthalene sample. The temperature sensor 1 is located inside the reagent container 4 to monitor the temperature of the naphthalene sample in real time. The control unit 13 is connected to the stirring motor 6 and the temperature sensor 1, and is used to control the stirring speed, collect temperature data, analyze and process it, and finally display it on the terminal output 14.

[0031] The reagent container fixing frame 3 specifically includes a reagent container support 16, a reagent container fixing block 15 between the reagent container support 16 and the reagent container 4, and a reagent container moving block 18. A fixing spring 17 is also provided between the reagent container moving block 18 and the reagent container support 16. A magnet 19 is provided on the reagent container support 16. The reagent container fixing frame 3 is connected to the reagent container mounting frame 8 through the magnet 19.

[0032] The reagent container 4 is mounted onto the reagent container support 16 and secured by the reagent container fixing block 15 and the reagent container moving block 16. The reagent container fixing block 15 is immovable, while the reagent container moving block 16 is movable and is clamped to the reagent container 4 by the elastic force of the fixing spring 17.

[0033] The working principle of this invention is as follows:

[0034] 1. Place the naphthalene sample to be tested into reagent container 4.

[0035] 2. Start the stirring mechanism to stir the naphthalene sample.

[0036] 3. Temperature sensor 1 monitors the temperature of the naphthalene sample in real time and transmits the temperature signal to control unit 13.

[0037] 4. The control unit 13 processes and analyzes the collected temperature data, determines the naphthalene crystallization point, and displays it on the terminal output 14.

[0038] 5. When the naphthalene sample reaches the crystallization point, the control unit 13 controls the stirring mechanism to stop stirring and records the crystallization temperature.

[0039] The embodiments described above are merely preferred embodiments of this utility model, and not all feasible embodiments of this utility model. For those skilled in the art, any obvious modifications made without departing from the principles and spirit of this utility model should be considered to be included within the scope of protection of the claims of this utility model.

Claims

1. An automatic stirring device based on the crystallization point of naphthalene, characterized in that, The container has a shell (10) with an inclined surface. A motor shaft (6) is provided on the inclined surface of the shell (10). The shell (10) is rotatably connected to the stirring rod (7) through the motor shaft (6). A slider is provided on the stirring rod (7) and is slidably connected to the horizontal empty rail provided on the stirring tray (9). The side of the stirring tray (9) is slidably connected to the slide rail (5) on the inclined surface of the shell (10). A reagent container mounting bracket (8) is fixedly installed on the stirring tray (9). A reagent container fixing bracket (3) is provided on the reagent container mounting bracket (8). A reagent container (4) is movably clamped on the reagent container fixing bracket (3). A temperature sensor fixing seat (2) is provided at the upper end of the reagent container (4). A temperature sensor (1) is provided on the temperature sensor fixing seat (2) and penetrates into the interior of the reagent container (4).

2. The automatic stirring device based on the naphthalene crystallization point according to claim 1, characterized in that, The outer shell (10) is provided with a temperature sensor placement rack (11) on the side, which is used to place the temperature sensor (1) after it is extracted from the reagent container (4).

3. The automatic stirring device based on the naphthalene crystallization point according to claim 1, characterized in that, The reagent container holder (3) specifically includes a reagent container support (16), a reagent container fixing block (15) between the reagent container support (16) and the reagent container (4), and a reagent container moving block (18). A fixing spring (17) is also provided between the reagent container moving block (18) and the reagent container support (16).

4. The automatic stirring device based on the naphthalene crystallization point according to claim 3, characterized in that, The reagent container support (16) is provided with a magnet (19), and the reagent container fixing frame (3) is connected to the reagent container mounting frame (8) through the magnet (19).

5. The automatic stirring device based on the naphthalene crystallization point according to claim 1, characterized in that, The temperature sensor (1) is connected to the control unit (13) via a data line (12).

6. The automatic stirring device based on the naphthalene crystallization point according to claim 5, characterized in that, The control unit (13) includes: Data acquisition module: used to acquire temperature signals output by the temperature sensor; Data processing module: Used to process and analyze the collected temperature data to determine the crystallization point of naphthalene; Control output module: Used to control the start / stop and stirring speed of the stirring mechanism based on the analysis results of the data processing module.

7. The automatic stirring device based on the naphthalene crystallization point according to claim 5, characterized in that, The control unit (13) is also connected to a terminal output (14), which is equipped with a display module and an alarm module for displaying temperature data and alarm information.

8. An automatic temperature measurement system for naphthalene crystallization point, characterized in that, The device includes the automatic stirring device based on the naphthalene crystallization point as described in claim 3, and a computer is also connected to the control unit (13). The computer is also connected to a printer. The computer is used to receive, store and process temperature data and generate temperature-time curves. The printer is used to print temperature-time curves and test reports.

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