Karl Fischer moisture detector

Abstract

The Karl Fischer moisture detector comprises an outer shell, a constant-temperature chamber is arranged in the outer shell, an opening end is arranged on the side portion of the constant-temperature chamber, and a protective plate capable of being pushed and pulled is buckled at the opening end. A push-and-pull plate is fixedly mounted on the inner side of the protective plate, a horizontally arranged rack is mounted below the push-and-pull plate, a supporting plate is fixedly mounted above the push-and-pull plate, a placement groove is formed in the supporting plate, and a reaction bottle is placed in the placement groove; a rotary disc is installed in the space between the supporting plate and the push-pull plate, and a magnet is embedded in the upper surface of the rotary disc. A magnetic stirrer is arranged at the bottom of the inner cavity of the reaction bottle. According to the Karl Fischer moisture detector provided by the utility model, errors caused by ambient temperature and illumination to a measurement result can be reduced, the measurement accuracy is ensured, and the reaction rate and the uniformity can be improved.

Description

Technical Field

[0001] The utility model relates to a Karl Fischer moisture detector, belonging to the technical field of moisture detection. Background Art

[0002] Karl Fischer moisture analyzer is a common moisture analyzer used for testing samples such as liquids, solvents, electrolytes, alcohols, esters, etc. in production inspection. It has a wide range of applications and is suitable for the determination of moisture content of various substances. In the metallurgical, chemical, pharmaceutical, food, and agricultural industries, it is necessary to measure the moisture content of raw materials or finished products, and these industries usually use Karl Fischer moisture analyzers.

[0003] There are various types of Karl Fischer moisture analyzers in the prior art, such as a Karl Fischer moisture analyzer disclosed in patent number CN201822247465.3 and a Karl Fischer moisture analyzer disclosed in CN202220381689.7. The analyzers generally have the following deficiencies in specific use:

[0004] 1. The reaction bottles are exposed to the outside environment. When the ambient temperature is too high, it will have a great impact on the Karl Fischer reagent. First, high temperature will increase the volatilization rate of the reagent and accelerate its loss. Secondly, during the electrolysis of water, the high temperature will have a certain impact on the electrolysis time, speed, repeatability and stability of the instrument.

[0005] 2. The reaction bottles are exposed to the outside environment. Direct sunlight on the reagents will cause the reagents to be automatically iodized. The reagents are iodized because the iodine ions are abnormally oxidized to iodine, which changes the proportion of the reagent components and darkens the color of the reagent, affecting the measurement results.

[0006] 3. The reaction rate and uniformity of the reagents in the reaction bottle need to be improved.

[0007] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0008] The utility model aims at the deficiencies in the background technology and provides a Karl Fischer moisture detector, which can reduce the error caused by ambient temperature and light to the measurement result, ensure the accuracy of measurement, and improve the reaction rate and uniformity.

[0009] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0010] The Karl Fischer moisture tester comprises an outer shell, a constant temperature chamber is arranged inside the outer shell, an opening end is arranged on the side of the constant temperature chamber, and a push-pull guard plate is buckled on the opening end;

[0011] A push-pull plate is fixedly installed on the inner side of the guard plate, a horizontally arranged rack is installed below the push-pull plate, a support plate is fixedly installed above the push-pull plate, a placement groove is provided inside the support plate, and a reaction bottle is placed in the placement groove;

[0012] A turntable is installed in the space between the support plate and the push-pull plate, and a magnet is embedded in the upper surface of the turntable; a magnetic stirrer is placed at the bottom of the inner cavity of the reaction bottle.

[0013] Furthermore, the rack is meshedly connected with a gear thereunder, and the gear is mounted on an output shaft of the first motor.

[0014] Furthermore, the first motor is fixed to the bottom of the inner cavity of the outer shell through a bracket.

[0015] Furthermore, the first motor is a forward and reverse motor.

[0016] Furthermore, a liquid adding nozzle connected to the inner cavity of the reaction bottle is provided on the upper part of the bottle body, and the liquid adding nozzle is inserted into the protective plate, and a hole adapted to the shape of the liquid adding nozzle is opened on the protective plate.

[0017] Furthermore, the turntable is mounted on the output shaft of a second motor, the second motor is fixed to the bottom of the push-pull plate, and the second motor drives the turntable to rotate.

[0018] Furthermore, the number of the magnets is two.

[0019] Compared with the prior art, the utility model has the following advantages after adopting the above technical solution:

[0020] The utility model can automatically push the reaction bottle into the constant temperature chamber of the outer shell, realize the constant temperature and airtight treatment of the reaction bottle, and then add the sample to be tested to the titration solution in the reaction bottle through the liquid adding nozzle, and the magnetic stirrer at the bottom of the inner cavity of the reaction bottle rotates with the magnet to stir the reagent, and the water and the iodine in the titration solution fully and evenly react to generate ions, so as to measure the water content. The utility model can reduce the error caused by the ambient temperature and light to the measurement result, ensure the accuracy of the measurement, and can effectively improve the reaction rate and uniformity.

[0021] The utility model is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 It is a schematic diagram of the structure of the utility model in the extended state;

[0024] Figure 3 This is a schematic diagram of the placement of the reaction bottle.

[0025] In the figure, 1-outer shell, 2-guard plate, 3-push-pull plate, 4-rack, 5-gear, 6-first motor, 7-support plate, 8-reaction bottle, 9-liquid adding nozzle, 10-turntable, 11-second motor, 12-magnet, 13-magnetic stirring bar. DETAILED DESCRIPTION

[0026] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0027] like Figure 1-Figure 3 As shown together, the utility model provides a Karl Fischer moisture detector, including an outer shell 1, a constant temperature chamber is provided inside the outer shell 1, an open end is provided on the side of the constant temperature chamber, a push-pull protective plate 2 is buckled at the open end, and the protective plate 2 can be buckled with the outer shell 1 to achieve a closed setting of the constant temperature chamber.

[0028] A push-pull plate 3 is fixedly installed on the inner side of the guard plate 2, a horizontally arranged rack 4 is installed below the push-pull plate 3, a support plate 7 is fixedly installed above the push-pull plate 3, a placement groove is provided inside the support plate 7, and a reaction bottle 8 is placed in the placement groove.

[0029] The rack 4 is meshedly connected with the gear 5 below it. The gear 5 is installed on the output shaft of the first motor 6. The first motor 6 is fixed to the bottom of the inner cavity of the outer shell 1 through a bracket.

[0030] The first motor 6 is a forward and reverse motor, and the first motor 6 provides power for the synchronous movement of the rack 4, the push-pull plate 3, the reaction bottle 8 and the guard plate 2.

[0031] The upper part of the reaction bottle 8 is provided with a liquid adding nozzle 9 connected to the inner cavity thereof, and the liquid adding nozzle 9 is penetrated in the protective plate 2, and the protective plate 2 is provided with a hole adapted to the shape of the liquid adding nozzle 9. When the reaction bottle 8 is in a closed constant temperature chamber, the test reagent can be added to the inner cavity of the reaction bottle 8 through the liquid adding nozzle 9.

[0032] A turntable 10 is installed in the space between the support plate 7 and the push-pull plate 3 . The turntable 10 is installed on the output shaft of a second motor 11 . The second motor 11 is fixed to the bottom of the push-pull plate 3 . The second motor 11 drives the turntable 10 to rotate.

[0033] The upper surface of the turntable 10 is embedded with two magnets 12 .

[0034] A magnetic stirrer 13 is placed at the bottom of the inner cavity of the reaction bottle 8. The magnet 12 drives the magnetic stirrer 13 to rotate as the turntable 10 rotates, thereby stirring the reagents in the inner cavity of the reaction bottle 8 to improve the reaction rate and uniformity.

[0035] The specific working principle of this utility model:

[0036] A titration solution of appropriate concentration is prepared and injected into the reaction bottle 8; then the first motor 6 automatically pushes the reaction bottle 8 into the constant temperature chamber of the outer shell 1 through gear transmission to achieve constant temperature and closed treatment of the reaction bottle 8; then the sample to be tested is added to the titration solution in the reaction bottle 8 through the liquid adding nozzle 9, and the magnetic stirrer 13 at the bottom of the inner cavity of the reaction bottle 8 rotates with the magnet 12 to stir the reagent, and the water and iodine in the titration solution fully and evenly react to generate ions, and the water content in the sample is calculated according to the calculation formula of Karl Fischer titration using the amount of titration solution and the sample mass.

[0037] The above is an example of the best implementation of the utility model, and the parts not described in detail are common knowledge of ordinary technicians in this field. The protection scope of the utility model is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. Karl Fischer moisture detector, characterized by: It comprises an outer shell (1), a constant temperature chamber is provided inside the outer shell (1), an open end is provided on the side of the constant temperature chamber, and a push-pull guard plate (2) is buckled on the open end; A push-pull plate (3) is fixedly mounted on the inner side of the guard plate (2), a horizontally arranged rack (4) is mounted below the push-pull plate (3), a support plate (7) is fixedly mounted above the push-pull plate (3), a placement groove is provided inside the support plate (7), and a reaction bottle (8) is placed in the placement groove; A turntable (10) is installed in the space between the support plate (7) and the push-pull plate (3), and a magnet (12) is embedded in the upper surface of the turntable (10); a magnetic stirrer (13) is placed at the bottom of the inner cavity of the reaction bottle (8).

2. The Karl Fischer moisture detector according to claim 1, characterized in that: The rack (4) is meshingly connected with a gear (5) below it, and the gear (5) is mounted on the output shaft of the first motor (6).

3. The Karl Fischer moisture detector according to claim 2, characterized in that: The first motor (6) is fixed to the bottom of the inner cavity of the outer shell (1) via a bracket.

4. The Karl Fischer moisture detector according to claim 3, characterized in that: The first motor (6) is a forward and reverse motor.

5. The Karl Fischer moisture detector according to claim 1, characterized in that: The upper part of the reaction bottle (8) is provided with a liquid adding nozzle (9) which is in communication with the inner cavity thereof. The liquid adding nozzle (9) is inserted into the protective plate (2). The protective plate (2) is provided with a hole which is adapted to the shape of the liquid adding nozzle (9).

6. The Karl Fischer moisture detector according to claim 1, characterized in that: The rotating disk (10) is mounted on the output shaft of a second motor (11); the second motor (11) is fixedly connected to the bottom of the push-pull plate (3); and the second motor (11) drives the rotating disk (10) to rotate.

7. The Karl Fischer moisture detector according to claim 1, characterized in that: The number of the magnets (12) is two.

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