Temperature control device for metering detection of online refractometer

Abstract

The utility model discloses a temperature control device for metering detection of an on-line refractometer, relates to on-line detection equipment for substance content or concentration, and mainly aims to provide a temperature control device which can ensure the reliability and the accuracy of a result of on-line detection of the substance content and is used for metering detection calibration of the on-line refractometer. According to the main technical scheme, the temperature control device for metering detection of the online refractometer comprises a loading part, the online refractometer is provided with a prism part, the prism part is arranged in the online refractometer, a container part comprises a sample container and a constant-temperature container, the sample container is arranged on the inner side of the constant-temperature container, and the loading part is connected with the loading part. The prism component is arranged at the bottom of the sample container; the constant-temperature part comprises a constant-temperature water tank, a connecting pipeline and a thermometer, one end of the connecting pipeline is connected to the constant-temperature water tank, the other end of the connecting pipeline is connected to the constant-temperature container, and the thermometer extends into the sample container. The device is mainly used for detecting the content of substances.

Description

TECHNICAL FIELD

[0001] The utility model relates to the online detection technology field of the content or concentration of matter based on the principle of refraction, especially relates to a temperature control device for online refractometer measurement and detection. BACKGROUND

[0002] The online refractometer is an instrument for continuously measuring the content of matter by using the principle of refraction and total reflection critical angle. The overall structure of the online refractometer is divided into three parts: a sensor, a transmitter, and a display. It is widely used in food, pharmaceutical and other industries, and can be installed on different pipe diameters or tank walls to realize online real-time product quality control.

[0003] During the measurement and detection of the online refractometer, the sensor needs to be taken out from the pipe or tank, which causes the sensor and the measured liquid to be exposed to the ambient air during the measurement and detection process. The refractive index error caused by the temperature fluctuation of the environment is much larger than the optical error of the instrument itself. By measuring the sucrose standard substance solution with a certified value through the sensor, the measured value of the online refractometer is compared with the certified value of the sucrose standard substance solution, and the difference between the two is one of the instrument measurement performance evaluation indexes, i.e. the indication error.

[0004] During the on-site measurement and detection process, the refractive index value is closely related to the temperature. Changes in temperature will cause changes in refractive index. In order to prevent the measured sample solution from being disturbed by the ambient temperature, the temperature control device is used to accurately control the temperature of the measured solution. UTILITY MODEL CONTENT

[0005] Therefore, the utility model embodiment provides a temperature control device for online refractometer measurement and detection, which mainly aims to provide a temperature control device that can improve the repeatability and accuracy of the detection results of the online refractometer during the measurement and detection process.

[0006] To achieve the above-mentioned purpose, the utility model mainly provides the following technical scheme:

[0007] The utility model embodiment provides a temperature control device for online refractometer measurement and detection, which comprises:

[0008] The loading component comprises an online refractometer and a container component. The online refractometer has a prism component, which is arranged inside the online refractometer. The container component comprises a sample container and a constant-temperature container. The sample container is arranged inside the constant-temperature container, and the prism component is arranged at the bottom of the sample container.

[0009] The constant temperature part comprises a constant temperature water tank, a connecting pipe and a thermometer, one end of the connecting pipe is connected to the constant temperature water tank, the other end is connected to a constant temperature container, and the thermometer extends into the sample container.

[0010] Further, the constant temperature container is externally provided with a water inlet hole and a water outlet hole.

[0011] Further, the connecting pipe comprises a water inlet pipe and a water return pipe, one end of the water inlet pipe is connected to the constant temperature water tank, the other end is connected to the water inlet hole, one end of the water return pipe is connected to the water outlet hole, and the other end is connected to the constant temperature water tank.

[0012] Further, the container part is an integral structure, a partition plate is arranged between the constant temperature container and the sample container, and the partition plate separates the container part into the constant temperature container and the sample container.

[0013] Further, the loading part further comprises a cover plate arranged at the upper portion of the sample container for covering the opening at the upper portion of the sample container.

[0014] Further, a first through hole is arranged on the cover plate, the thermometer is inserted into the first through hole and is close to the direction of the prism part.

[0015] Further, a fixed buckle is arranged at the upper edge position of the first through hole, and the fixed buckle is detachably connected to the cover plate.

[0016] Compared with the prior art, the utility model has the following technical effects:

[0017] The technical scheme provided by the embodiment of the utility model discloses the effect of loading component is loading the liquid of being examined and constant temperature water, loading component includes online refractometer and container component, online refractometer has prism component, the prism component sets up in the inside of online refractometer, container component includes sample container and constant temperature container, sample container sets up in the inside of constant temperature container, the prism component sets up in the bottom of sample container, the effect of constant temperature component is adjusting the temperature of liquid of being examined, constant temperature component includes constant temperature water tank, connecting pipeline and thermometer, one end of connecting pipeline is connected to constant temperature water tank, and the other end is connected to constant temperature container, the thermometer is extended into sample container, relative to prior art, in the process of measuring and detecting to online refractometer, need to take out its sensor from the pipeline or jar body, cause in the process of measuring and detecting sensor and measured liquid are exposed to ambient air, the refractive index error brought by environmental temperature fluctuation is far more than the optical error of instrument itself, and the dispersion of measured value brought by environmental temperature fluctuation is far more than the measurement repeatability of instrument itself, in the technical scheme, through being installed in the sample container of liquid of being examined, constant temperature water tank passes through connecting pipeline and is led into constant temperature container, make the inside liquid of being examined of sample container always keep with the temperature of water in constant temperature container same, and the water bath temperature of constant temperature container is regulated under the monitoring of accurate thermometer and is guided to temperature, finally balance and stabilize in the specified temperature work, and keep temperature fluctuation in the allowable range, like this can avoid the refractive index error brought by environmental temperature fluctuation to the minimum degree, also can obtain the refractive index value under any temperature in the adjustable range of water bath temperature, thereby reach the technical effect of improving the accuracy of detection. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structure diagram of the temperature control device for online refractometer measurement and detection provided by the embodiment of the utility model is shown. DETAILED DESCRIPTION

[0019] The utility model will be further explained in detail in connection with the drawings and examples.

[0020] As Figure 1 shown, the utility model embodiment provides a kind of temperature control device for online refractometer measurement and detection, and the device includes:

[0021] Loading component, loading component includes online refractometer 11 and container component, the online refractometer has prism component 12, the prism component 12 is set in the inside of online refractometer 11, the container component includes sample container 131 and constant temperature container 132, the sample container 131 is set in the inside of constant temperature container 132, and the prism component 12 is set in the bottom of sample container 131;

[0022] A constant temperature component, which comprises a constant temperature water tank, a connecting pipeline and a thermometer, one end of the connecting pipeline is connected to the constant temperature water tank, the other end is connected to the constant temperature container 132, and the thermometer extends into the sample container 131.

[0023] In the technical scheme, the loading component loads the detected liquid and constant temperature water, and the loading component comprises an online refractometer 11 and a container component, the online refractometer has a prism component 12, the prism component 12 is arranged inside the online refractometer 11, and the container component comprises a sample container 131 and a constant temperature container 132, the sample container 131 is arranged inside the constant temperature container 132, and the prism component 12 is arranged at the bottom of the sample container 131; the constant temperature component adjusts the temperature of the detected liquid, and the constant temperature component comprises a constant temperature water tank, a connecting pipeline and a thermometer, one end of the connecting pipeline is connected to the constant temperature water tank, the other end is connected to the constant temperature container 132, and the thermometer extends into the sample container 131; compared with the prior art, in the measurement and detection process of the online refractometer, the sensor needs to be taken out from the pipeline or the tank body, so that the sensor and the measured liquid are exposed to the ambient air in the measurement and detection process, the refractive index error caused by the ambient temperature fluctuation is much larger than the optical error of the instrument itself, in the technical scheme, the detected liquid is loaded in the sample container 131, the constant temperature water tank passes the constant temperature water into the constant temperature container 132 through the connecting pipeline, so that the detected liquid in the sample container 131 always maintains the same temperature as the water in the constant temperature container 132, the water bath temperature of the constant temperature container 132 is adjusted through the monitoring and guidance of the precise thermometer, finally, the water bath temperature is balanced and stabilized at the specified temperature and works, and the temperature fluctuation is kept within the allowable range, so that the refractive index error caused by the ambient temperature fluctuation can be avoided to the minimum extent, the consistency of the measurement temperature in the repetitive measurement condition is ensured, and the refractive index value at any temperature within the adjustable range of the water bath temperature can be measured, so that the technical effect of improving the detection accuracy is achieved.

[0024] The loading component loads the liquid under test and constant temperature water, and includes an online refractometer 11, a prism component 12 arranged inside the online refractometer 11, and a container component including a sample container 131 arranged inside a constant temperature container 132, and the prism component 12 is arranged at the bottom of the sample container 131. The online refractometer 11 can be an existing online refractometer 11, the prism component 12 is arranged at the upper portion of the online refractometer 11, the container component is a glass container, the sample container 131 is not communicated with the constant temperature container 132, the sample container 131 is arranged inside the constant temperature container 132, and the constant temperature container 132 is completely sealed. An opening is arranged at the upper portion of the sample container 131. Specifically, the container component is an integrated structure, a partition plate 133 is arranged between the constant temperature container 132 and the sample container 131, and the partition plate 133 separates the container component into the constant temperature container 132 and the sample container 131. The constant temperature component adjusts the temperature of the liquid under test, and includes a constant temperature water tank 21, a connecting pipeline, and a thermometer 23. One end of the connecting pipeline is connected to the constant temperature water tank 21, and the other end is connected to the constant temperature container 132. The thermometer 23 is inserted into the sample container 131. The constant temperature water tank 21 is a constant temperature water bath tank, the temperature range is (10-100) ℃, the temperature fluctuation is ±0.02 ℃ / 10 min, the constant temperature water tank 21 has a drainage connection end and a backwater connection end, the constant temperature container 132 is externally provided with a water inlet hole and a drainage hole, the connecting pipeline includes a water inlet pipeline 221 and a backwater pipeline 222. One end of the water inlet pipeline 221 is connected to the drainage connection end of the constant temperature water tank 21, and the other end is connected to the water inlet hole. One end of the backwater pipeline 222 is connected to the backwater hole, and the other end is connected to the backwater connection end of the constant temperature water tank 21. The temperature of the water in the constant temperature water tank 21 is adjusted, and then the constant temperature water is introduced into the constant temperature container 132 through the water inlet pipeline 221. The thermometer 23 is a digital thermometer, the measurement range can cover (10-100) ℃, the resolution is 0.01 ℃ or above, and the maximum allowable error is not more than ±0.02 ℃. In this technical solution, the liquid under test is arranged in the sample container 131, the constant temperature water tank 21 introduces the constant temperature water into the constant temperature container 132 through the connecting pipeline, so that the liquid under test in the sample container 131 always maintains the same temperature as the water in the constant temperature container 132. Then, the online refractometer 11 obtains and reads the refractive index value and the sugar content measurement value. Then, the temperature of the constant temperature water tank 21 is changed, the measurement is repeated multiple times, and the average and temperature value error are calculated. The temperature control device ensures that the temperature control accuracy is ±0.02 ℃ at the specified temperature, and the temperature fluctuation is ±0.02 ℃ at the specified temperature, so that the accuracy and reliability of the detection result of the substance content are improved.

[0025] The specific temperature indication error calibration steps are as follows:

[0026] Insert the thermometer 23 into the sample container 131, place the temperature measuring probe of the thermometer 23 at the bottom of the sample container 131, as close as possible to the prism component 12, inject double-distilled water, and immerse the temperature measuring probe. Set the constant temperature water bath temperature of the constant temperature water tank 21 to 10.0℃, 20.0℃, and 30.0℃, respectively. After the temperature is balanced and stable, record the temperature indication of the thermometer 23 and the temperature of the online refractometer 11 at the same time. At 10.0℃, 20.0℃, and 30.0℃, respectively, repeat the measurement 3 times, take the arithmetic mean of the temperature indication of the online refractometer 11 at each temperature and the arithmetic mean of the temperature indication of the thermometer 23, and calculate the temperature indication error at each temperature according to formula (1).

[0027] (1) In the formula:

[0028]

[0029] ΔT—temperature indication error, ℃;

[0030] —average value of the temperature indication of the online refractometer, ℃;

[0031] —average value of the temperature indication of the thermometer, ℃.

[0032] The specific refractive index indication error calibration steps are as follows:

[0033] After cleaning the sample container 131, insert the thermometer 23, place the temperature measuring probe of the thermometer 23 at the bottom of the sample container 131, as close as possible to the prism component 12, pour the measured refractive index standard substance, and immerse the temperature measuring probe. Adjust the constant temperature water bath temperature so that the temperature of the thermometer 23 stabilizes at 20.0℃. After the temperature is completely balanced and stable, remove the thermometer and read the refractive index measurement indication. The refractive index standard substances with refractive indices around 1.3 and around 1.5 are used as the measured samples. Measure from low refractive index to high refractive index in order, repeat the measurement 3 times for each, and calculate the indication error according to formula (2).

[0034] (2) In the formula:

[0035]

[0036] ΔZ—refractive index indication error;

[0037] —average value of the refractive index measurement of the online refractometer at a temperature of 20.0℃;

[0038] Z SThe refractive index certified value of the standard substance at 20.0℃.

[0039] The specific repetitive calibration steps are as follows:

[0040] After cleaning the sample container 131, insert the thermometer 23, place the temperature measuring probe of the thermometer 23 at the bottom of the sample container 131, as close as possible to the prism component 12, pour the measured sucrose solution standard substance, and immerse the temperature measuring probe, adjust the temperature of the constant temperature water bath, so that the temperature of the thermometer 23 is stable at 20.0℃, after the temperature is completely balanced and stable, remove the thermometer, read the sugar content value, and the sugar content value of the standard substance is about 30%, and the standard substance is measured as the sample, and the standard substance is measured as the sample. Repeat the measurement 6 times, and calculate the indication error according to formula (3).

[0041] (3) In the formula:

[0042]

[0043] s—sugar content repeatability;

[0044] x i —online refractometer i-th measurement value;

[0045] —online refractometer 6 measurement value average;

[0046] n—number of measurements.

[0047] Further, the loading component further comprises a cover plate 15, which is arranged at the upper part of the sample container 131, and is used to cover the opening at the upper part of the sample container 131. In this embodiment, the loading component is further limited, and a detachable cover plate 15 is arranged at the upper part of the sample container 131. The cover plate 15 can cover the upper part of the sample container 131 to prevent impurities from falling into the sample container 131. Specifically, a first through hole is arranged on the cover plate 15, and the thermometer 23 is inserted into the first through hole and approaches the prism component 12, so that the thermometer 23 can pass through the cover plate 15 and be inserted into the sample container 131 for temperature measurement. Specifically, in order to ensure the accuracy of the measurement of the thermometer 23, a fixed buckle 16 is arranged at the upper edge of the first through hole, and the fixed buckle 16 is detachably connected to the cover plate 15, so that the thermometer 23 is fixed on the fixed buckle 16, and the thermometer 23 always remains vertically arranged, thereby achieving the technical effect of improving the accuracy of measurement.

[0048] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A temperature control device for online refractometer measurement and testing, characterized in that, include: The loading component includes an online refractometer and a container component. The online refractometer has a prism component disposed inside the online refractometer. The container component includes a sample container and a constant temperature container. The sample container is disposed inside the constant temperature container, and the prism component is disposed at the bottom of the sample container. The temperature control component includes a temperature control water tank, a connecting pipe, and a thermometer. One end of the connecting pipe is connected to the temperature control water tank, and the other end is connected to the temperature control container. The thermometer extends into the sample container.

2. The temperature control device for online refractometer measurement and detection according to claim 1, characterized in that, The thermostatic container is provided with a water inlet and a drain outlet on its exterior.

3. The temperature control device for online refractometer measurement and detection according to claim 2, characterized in that, The connecting pipes include an inlet pipe and a return pipe. One end of the inlet pipe is connected to the constant temperature water tank, and the other end is connected to the inlet hole. One end of the return pipe is connected to the drain hole, and the other end is connected to the constant temperature water tank.

4. The temperature control device for online refractometer measurement and detection according to claim 1, characterized in that, The container component is a one-piece molded structure, and a partition plate is provided between the constant temperature container and the sample container, the partition plate separating the container component into the constant temperature container and the sample container.

5. A temperature control device for online refractometer measurement and detection according to any one of claims 1 to 4, characterized in that, The loading component also includes a cover plate disposed on the upper part of the sample container to cover the opening at the upper part of the sample container.

6. A temperature control device for online refractometer measurement and detection according to claim 5, characterized in that, The cover plate is provided with a first through hole, and the thermometer is inserted into the first through hole and moves toward the prism component.

7. A temperature control device for online refractometer measurement and detection according to claim 6, characterized in that, A fixing buckle is provided at the upper edge of the first through hole, and the fixing buckle is detachably connected to the cover plate.

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