A Karl-Fischer titrator

Abstract

This invention discloses a Karl Fischer titrator, relating to the field of chemical analysis instrument technology. It includes a detection stage, a titration flask, a homogenization unit, an anti-fouling unit, and a titration unit. The detection stage provides a mounting base for the titration flask, which holds the reaction solution. The homogenization unit homogenizes the reaction solution, the anti-fouling unit recirculates any residue adhering to the wall back into the reaction solution, and the titration unit controls the amount of Karl Fischer solution added. During titration, the homogenization unit is activated, driving the titration unit to add the Karl Fischer solution to the titration flask while simultaneously homogenizing the solution to prevent dead zones. The anti-fouling unit recirculates any residue adhering to the wall back into the reaction solution, preventing droplets from being unable to participate in subsequent reactions, thus avoiding detection errors and waste.

Description

Technical Field

[0001] This invention relates to the field of chemical analysis instrument technology, specifically a Karl Fischer titrator. Background Technology

[0002] Karl Fischer titration, as a core method for trace moisture determination, is widely used in chemical, pharmaceutical, and semiconductor fields due to the unique quantitative reaction characteristics of iodine and water. Its detection accuracy directly depends on the thoroughness of the mixing of sample and reagent within the titration system, as well as the sealing and stability of the reaction system. The stirring mechanism and reaction cell structure of the titrator are key components affecting the mixing effect and the consistency of detection; their rational design plays a decisive role in the accuracy and repeatability of the measurement results.

[0003] Most existing Karl Fischer titrators employ traditional magnetic stirring, using an external rotating magnetic field to drive a magnetic stir bar within the reaction cell to mix the sample and reagents. However, this type of stirring structure has inherent technical drawbacks: Firstly, the fixed rotation trajectory of the magnetic stir bar easily creates a vortex-like "stirring dead zone" in the center of the reaction cell, preventing the sample and Karl Fischer reagent from making rapid and uniform contact. This is especially problematic for high-viscosity samples or samples with trace amounts of moisture, where insufficient mixing can lead to reaction lag, inaccurate titration endpoint determination, and consequently, reduced detection accuracy. Secondly, the centrifugal force generated by the rotating stir bar can cause some reagent to splash onto the inner wall of the reaction cell, forming droplets that cannot participate in subsequent reactions. This not only wastes reagents but also results in a discrepancy between the actual amount of reagent involved in the reaction and the theoretical value, leading to detection errors. Summary of the Invention

[0004] The technical problem to be solved by the present invention is the problem of uniform stirring and prevention of wall adhesion in a titrator, and a Karl Fischer titrator is provided.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A Karl Fischer titrator includes a titration bottle with electrodes disposed on it. A corrugated groove is disposed inside the titration bottle, the corrugated groove being composed of a downward section and an upward section. The depth of the downward section of the corrugated groove is greater than the depth of the upward section. A uniform unit is disposed inside the titration bottle. The homogenizing unit includes a homogenizing component, which uniformly stirs the reaction liquid by changing the stirring range. The homogenizing component includes a driving component, a stirring component, and an adjusting component. The stirring component and the adjusting component are hinged together, and the driving component and the adjusting component are fixedly connected. The titration bottle is equipped with an anti-wall-sticking unit, which includes an anti-wall-sticking component. The anti-wall-sticking component periodically changes position to remove residual liquid from the inner wall of the titration bottle. The anti-wall-sticking component includes a detection element and an anti-wall-sticking element. The anti-wall-sticking element is fixedly connected to an adjustment element, and the detection element is fixedly connected to a driving element. The detection element is electrically connected to the anti-wall-sticking element, and the anti-wall-sticking element is installed inside the titration bottle. The homogenizing unit is equipped with a titration unit. Existing titrators suffer from stirring dead zones and wall adhesion issues. This invention eliminates stirring dead zones through the homogenizing unit and anti-wall adhesion unit, ensuring uniform stirring while simultaneously removing adhering liquid, thus guaranteeing detection accuracy.

[0006] Furthermore, the driving component includes a straight column, a slider, a sleeve, and a bent rod. A mounting platform is provided inside the titration bottle. A magnetic rotor is provided at one end of the straight column, and the magnetic rotor is rotatably connected to the mounting platform. A double helical groove is provided on the outer surface of the straight column. The slider is slidably connected to the double helical groove of the straight column via a locking block. The sleeve is fitted onto the outer surface of the straight column, and the sleeve near the bottom of the titration bottle is fixedly connected to the mounting platform. The mounting platform is rotatably installed at the bottom of the titration bottle. The bent rod is fixedly connected to the sleeve. A conductive ring is provided on one side of the slider, and the slider is slidably connected to the bent rod via the conductive ring. An internal thread is provided inside the straight column.

[0007] Furthermore, the stirring component includes a first straight rod, a stirring plate, and a second straight rod. One end of the first straight rod is hinged to the slider, and the other end of the first straight rod is connected to the stirring plate via a spring. One end of the second straight rod is fixedly connected to the stirring plate, and the other end of the second straight rod is slidably mounted on the corrugated groove. Existing technologies only achieve unidirectional, fixed-range rotation. This invention changes the stirring range through the periodic movement of the stirring component, ensuring uniform stirring.

[0008] Furthermore, the adjusting component includes a rotating wedge and a driving wedge, the rotating wedge being fixedly connected to a sleeve located away from the bottom of the titration flask. In existing technologies, magnetic rotor stirring methods are prone to dead zones and uneven stirring, affecting detection accuracy. This invention, through a driving component working in conjunction with a stirring component and an adjusting component, ensures uniform stirring of the reaction solution, thereby guaranteeing detection accuracy.

[0009] Furthermore, the anti-snagging component includes a scraper ring and a memory spring. The drive wedge is connected to the scraper ring via a connecting rod. The scraper ring is slidably connected to the inner wall of the titration bottle. One end of the memory spring is connected to the scraper ring, and the other end of the memory spring is fixedly connected to the cap end of the titration bottle.

[0010] Furthermore, the detection element includes a drive coil, which is uniformly wound on a bent rod. The drive coil near the bottom of the titration flask is the current input terminal, and the conductive ring of the slider is electrically connected to a memory spring. In the prior art, during the titration reaction process, residual droplets generated on the inner wall of the titration flask by centrifugal force do not react, affecting the detection accuracy. This invention uses an anti-fouling component to periodically remove residual liquid adhering to the inner wall of the titration flask, allowing it to flow back and ensuring detection accuracy.

[0011] Furthermore, the titration unit includes a titration assembly that transports a quantitative amount of Karl Fischer solution by movement. The titration assembly includes an opening / closing element and a rotating element. Existing titration techniques rely on manual operation, which can lead to problems such as leakage and contamination. This invention, by quantitatively discharging the Karl Fischer solution, ensures accurate delivery while preventing contamination.

[0012] Furthermore, the opening and closing components include a burette, a push plate, a smooth rod, and a flap. The burette is fixedly installed on the titration bottle. The push plate is fixedly connected to the smooth rod. One end of the smooth rod is connected to the end of the flap away from the bottom of the titration bottle via a connecting rod. A boss is provided at the end of the smooth rod near the slider. The flap is connected to the burette via a torsion spring. The flap is slidably connected to the smooth rod.

[0013] Furthermore, the rotating component includes a screw and a circular plate. One end of the screw is fixedly connected to the guide rod, and the other end of the screw is threaded into a straight column. The circular plate is fixedly mounted on the sleeve, and the end of the circular plate near the guide rod is provided with a groove that matches the guide rod boss.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention utilizes a magnetically rotating detection stage during titration reactions to cause a straight column to rotate synchronously with a magnetic rotor. This causes a slider to reciprocate along the double helical groove of the straight column. On one hand, under the action of a conductive ring, the slider moves up and down along a bent rod. During the reciprocating contact between the conductive ring and the drive coil, the current supplied to the drive coil by the external controller is altered, causing the current supplied to the memory spring through the conductive ring to change periodically. This results in the memory spring intermittently extending and contracting, driving the scraper ring to move up and down. On the other hand, the periodic downward sliding of the scraper ring drives the drive wedge to move periodically downward, generating a radial thrust on the rotating wedge during contact. This, in turn, drives the bent rod to rotate under the transmission action of the sleeve. The rod drives the slider to rotate synchronously. Under the transmission action of the first straight rod, it drives the stirring plate to rotate and stir the reaction solution. At the same time, the second straight rod slides along the corrugated groove. Since the depth of the lower section of the corrugated groove is greater than the depth of the upper section, when the second straight rod slides through the upper section of the corrugated groove, the corrugated groove pushes the second straight rod, causing the stirring plate to squeeze the spring and move the stirring plate towards the straight column. When the second straight rod slides through the lower section of the corrugated groove, the spring, under its own restoring force, drives the stirring plate towards the inner wall of the titration bottle. This causes the stirring plate to perform extension and contraction motion during rotation, increasing the stirring range while changing the dead zone generated by the eddy current state, improving the uniformity of the reaction solution, improving the accuracy of the detection results, and improving the detection efficiency.

[0015] 2. In this invention, during the reciprocating contact between the conductive ring and the drive coil, the current connected to the drive coil by the external controller is altered. As the conductive ring slides, the effective number of turns of the drive coil connected to the circuit changes, thereby changing the resistance of the circuit. This causes the current supplied to the memory spring through the conductive ring to periodically increase and decrease. Consequently, the memory spring intermittently changes its expansion and contraction according to the magnitude of the current, generating a reciprocating expansion and contraction motion. This, in turn, drives the scraper ring to move back and forth on the inner wall of the titration flask. This pushes the reaction liquid that is thrown against the inner wall of the titration flask due to centrifugal force during stirring back into the reaction liquid, thus achieving the effect of preventing wall adhesion and avoiding excessive error in the detection results caused by some solution not participating in the reaction.

[0016] 3. This invention, during the rotation of the straight column, drives the screw and polished rod to rotate and move simultaneously through the transmission action of the internal thread of the straight column and the external thread of the screw. On the one hand, the push plate, driven by the connecting rod, pushes the flap downward to open the channel, allowing the Karl Fischer solution in the burette to be quantitatively added into the reaction solution of the titration bottle, avoiding the problems of leakage and infection during personnel titration. On the other hand, when the straight column continues to rotate to the unthreaded part of the screw, the boss of the polished rod engages with the groove on the circular plate, so that the polished rod and the screw rotate synchronously with the straight column and no longer descend, preventing the polished rod from detaching from the burette and becoming unusable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the titration bottle of the present invention; Figure 3 for Figure 2 A partial enlarged view of the structure at point A in the middle; Figure 4 This is a schematic diagram of the external structure of the driving component of the present invention; Figure 5 for Figure 4 A partial enlarged view of the structure at point B in the middle; Figure 6 This is a schematic diagram of the anti-hanging component installation position structure of the present invention; Figure 7 for Figure 6 A partial enlarged view of the structure at point C; Figure 8 This is a schematic diagram of the external structure of the stirring component of the present invention; Figure 9 for Figure 8 A partial enlarged view of the structure at point D.

[0018] In the diagram: 1. Testing platform; 2. Titration bottle; 21. Corrugated groove; 3. Homogenization unit; 31. Straight column; 32. Slider; 33. Sleeve; 34. Bending rod; 35. First straight rod; 36. Stirring plate; 37. Second straight rod; 38. Rotating wedge; 39. Driving wedge; 4. Anti-wall sticking unit; 41. Scraper ring; 42. Memory spring; 5. Titration unit; 51. Burette; 52. Push plate; 53. Smooth rod; 54. Flip plate; 55. Screw; 56. Circular plate. Detailed Implementation

[0019] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example: Figures 1-9 As shown, the present invention provides the following technical solution: like Figures 1-3 As shown, a Karl Fischer titrator includes a titration bottle 2, an electrode is provided on the titration bottle 2, a corrugated groove 21 is provided inside the titration bottle 2, the corrugated groove 21 is composed of a downward section and an upward section, the groove depth of the downward section of the corrugated groove 21 is greater than the groove depth of the upward section, and a uniform unit 3 is provided inside the titration bottle 2. The homogenizing unit 3 includes a homogenizing component, which uniformly stirs the reaction liquid by changing the stirring range. The homogenizing component includes a driving component, a stirring component, and an adjusting component. The stirring component and the adjusting component are hinged together, and the driving component and the adjusting component are fixedly connected. The titration bottle 2 is equipped with an anti-wall-sticking unit 4. The anti-wall-sticking unit 4 includes an anti-wall-sticking component. The anti-wall-sticking component periodically changes position to remove residual liquid from the inner wall of the titration bottle 2. The anti-wall-sticking component includes a detection element and an anti-wall-sticking component. The anti-wall-sticking component is fixedly connected to the adjustment element, the detection element is fixedly connected to the driving element, and the detection element is electrically connected to the anti-wall-sticking component. The anti-wall-sticking component is installed inside the titration bottle 2. A titration unit 5 is provided on the homogenization unit 3.

[0021] The testing station 1 is used to provide a mounting base for the titration bottle 2.

[0022] like Figure 4 As shown, the driving component includes a straight column 31, a slider 32, a sleeve 33, and a bent rod 34. A mounting platform is provided inside the titration bottle 2. A magnetic rotor is provided at one end of the straight column 31, and the magnetic rotor is rotatably connected to the mounting platform. A double helical groove is provided on the outer surface of the straight column 31. The slider 32 is slidably connected to the double helical groove of the straight column 31 through a locking block. The sleeve 33 is sleeved on the outer surface of the straight column 31. The sleeve 33 near the bottom of the titration bottle 2 is fixedly connected to the mounting platform. The mounting platform is rotatably installed at the bottom of the titration bottle 2. The bent rod 34 is fixedly connected to the sleeve 33. A conductive ring is provided on one side of the slider 32. The slider 32 is slidably connected to the bent rod 34 through the conductive ring. An internal thread is provided inside the straight column 31.

[0023] like Figure 8 As shown, the stirring component includes a first straight rod 35, a stirring plate 36, and a second straight rod 37. One end of the first straight rod 35 is hinged to the slider 32, and the other end of the first straight rod 35 is connected to the stirring plate 36 by a spring. One end of the second straight rod 37 is fixedly connected to the stirring plate 36, and the other end of the second straight rod 37 is slidably mounted on the wave groove 21.

[0024] like Figure 7 As shown, the adjusting component includes a rotating wedge 38 and a driving wedge 39. The rotating wedge 38 is fixedly connected to a sleeve 33 located away from the bottom of the titration bottle 2.

[0025] When a titration reaction is required, the testing stage 1 provides magnetic rotation, causing the straight column 31 to rotate synchronously with the magnetic rotor. This causes the slider 32 to reciprocate along the double helical groove of the straight column 31. On one hand, under the action of the conductive ring, it drives the slider to move up and down along the bent rod 34. During the reciprocating contact between the conductive ring and the drive coil, the current connected to the drive coil by the external controller is changed, causing the current supplied to the memory spring 42 through the conductive ring to change periodically. This causes the memory spring 42 to intermittently extend and contract, driving the scraper ring 41 to move up and down. On the other hand, the periodic downward sliding of the scraper ring 41 drives the drive wedge 39 to move downward periodically. This generates a radial thrust on the rotating wedge 38 during contact with it, which, under the transmission action of the sleeve 33, drives the bent rod 34 to rotate. The bent rod 34 then drives the slider 32. The first straight rod 35 rotates synchronously, driving the stirring plate 36 to rotate and stir the reaction solution. At the same time, the second straight rod 37 slides along the corrugated groove 21. Since the depth of the lower section of the corrugated groove 21 is greater than that of the upper section, when the second straight rod 37 slides through the upper section of the corrugated groove 21, the corrugated groove 21 pushes the second straight rod 37 to drive the stirring plate 36 to squeeze the spring, causing the stirring plate 36 to move towards the straight column 31. When the second straight rod 37 slides through the lower section of the corrugated groove 21, the spring, under its own restoring force, drives the stirring plate 36 to move towards the inner wall of the titration bottle 2. This causes the stirring plate 36 to perform telescopic motion during rotation, increasing the stirring range while changing the dead zone generated by the eddy current state, improving the uniformity of the reaction solution, improving the accuracy of the detection results, and improving the detection efficiency.

[0026] like Figure 6 As shown, the anti-snagging component includes a scraper ring 41 and a memory spring 42. The drive wedge block 39 is connected to the scraper ring 41 via a connecting rod. The scraper ring 41 is slidably connected to the inner wall of the titration bottle 2. One end of the memory spring 42 is connected to the scraper ring 41, and the other end of the memory spring 42 is fixedly connected to the cap end of the titration bottle 2.

[0027] like Figure 4 As shown, the detection device includes a drive coil, which is evenly wound on the bent rod 34. The drive coil near the bottom of the titration bottle 2 is the current input end, and the conductive ring of the slider 32 is electrically connected to the memory spring 42.

[0028] During the reciprocating contact between the conductive ring and the drive coil, the current connected to the drive coil by the external controller is activated. As the conductive ring slides, the effective number of turns of the drive coil connected to the circuit changes, thereby changing the resistance of the circuit. This causes the current supplied to the memory spring 42 through the conductive ring to periodically increase and decrease. Consequently, the memory spring 42 intermittently changes its expansion and contraction according to the magnitude of the current, generating a reciprocating expansion and contraction motion. This, in turn, drives the scraper ring 41 to move back and forth on the inner wall of the titration bottle 2. This pushes the reaction liquid that is thrown against the inner wall of the titration bottle 2 due to centrifugal force during the stirring process back into the reaction liquid, thus achieving the effect of preventing wall adhesion and avoiding excessive error in the detection results caused by some solution not participating in the reaction.

[0029] like Figure 3 As shown, the titration unit 5 includes a titration component that transports a quantitative Karl Fischer solution by moving. The titration component includes an opening / closing element and a rotating element.

[0030] like Figure 5 As shown, the opening and closing components include a burette 51, a push plate 52, a smooth rod 53, and a flap 54. The burette 51 is fixedly installed on the titration bottle 2. The push plate 52 is fixedly connected to the smooth rod 53. One end of the smooth rod 53 is connected to the flap 54 away from the bottom of the titration bottle 2 via a connecting rod. A boss is provided at the end of the smooth rod 53 near the slider 32. The flap 54 is connected to the burette 51 via a torsion spring. The flap 54 is slidably connected to the smooth rod 53.

[0031] like Figure 9 As shown, the rotating component includes a screw 55 and a circular plate 56. One end of the screw 55 is fixedly connected to the guide rod 53, and the other end of the screw 55 is threaded into the straight column 31. The circular plate 56 is fixedly installed on the sleeve 33. The end of the circular plate 56 near the guide rod 53 is provided with a groove that matches the boss of the guide rod 53.

[0032] During the rotation of the straight column 31, the internal thread of the straight column 31 and the external thread of the screw 55 drive the screw 55 and the smooth rod 53 to rotate and move simultaneously. On the one hand, the push plate 52, under the transmission action of the connecting rod, pushes the flip plate 54 to flip downward and open the channel, so that the Karl Fischer solution in the burette 51 is quantitatively added into the reaction solution of the titration bottle 2, avoiding the problem of leakage and infection during personnel titration. On the other hand, when the straight column 31 continues to rotate to the unthreaded part of the screw 55, the boss of the smooth rod 53 engages with the slot on the circular plate 56, so that the smooth rod 53 and the screw 55 rotate synchronously with the straight column 31 and no longer descend, avoiding the problem of the smooth rod 53 detaching from the burette 51 and becoming unusable later.

[0033] Working principle of the invention: When a titration reaction is required, the testing stage 1 provides magnetic rotation, causing the straight column 31 to rotate synchronously with the magnetic rotor. This causes the slider 32 to reciprocate along the double helical groove of the straight column 31. On one hand, under the action of the conductive ring, it drives the slider to move up and down along the bent rod 34. During the reciprocating contact between the conductive ring and the drive coil, the current connected to the drive coil by the external controller is changed, causing the current supplied to the memory spring 42 through the conductive ring to change periodically. This causes the memory spring 42 to intermittently extend and contract, driving the scraper ring 41 to move up and down. On the other hand, the periodic downward sliding of the scraper ring 41 drives the drive wedge 39 to move downward periodically. This generates a radial thrust on the rotating wedge 38 during contact with it, which, under the transmission action of the sleeve 33, drives the bent rod 34 to rotate. The bent rod 34 then drives the slider 32. The first straight rod 35 rotates synchronously, driving the stirring plate 36 to rotate and stir the reaction solution. At the same time, the second straight rod 37 slides along the corrugated groove 21. Since the depth of the lower section of the corrugated groove 21 is greater than that of the upper section, when the second straight rod 37 slides through the upper section of the corrugated groove 21, the corrugated groove 21 pushes the second straight rod 37 to drive the stirring plate 36 to squeeze the spring, causing the stirring plate 36 to move towards the straight column 31. When the second straight rod 37 slides through the lower section of the corrugated groove 21, the spring, under its own restoring force, drives the stirring plate 36 to move towards the inner wall of the titration bottle 2. This causes the stirring plate 36 to perform telescopic motion during rotation, increasing the stirring range while changing the dead zone generated by the eddy current state, improving the uniformity of the reaction solution, improving the accuracy of the detection results, and improving the detection efficiency.

[0034] During the reciprocating contact between the conductive ring and the drive coil, the current connected to the drive coil by the external controller is activated. As the conductive ring slides, the effective number of turns of the drive coil connected to the circuit changes, thereby changing the resistance of the circuit. This causes the current supplied to the memory spring 42 through the conductive ring to periodically increase and decrease. Consequently, the memory spring 42 intermittently changes its expansion and contraction according to the magnitude of the current, generating a reciprocating expansion and contraction motion. This, in turn, drives the scraper ring 41 to move back and forth on the inner wall of the titration bottle 2. This pushes the reaction liquid that is thrown against the inner wall of the titration bottle 2 due to centrifugal force during the stirring process back into the reaction liquid, thus achieving the effect of preventing wall adhesion and avoiding excessive error in the detection results caused by some solution not participating in the reaction.

[0035] During the rotation of the straight column 31, the internal thread of the straight column 31 and the external thread of the screw 55 drive the screw 55 and the smooth rod 53 to rotate and move simultaneously. On the one hand, the push plate 52, under the transmission action of the connecting rod, pushes the flip plate 54 to flip downward and open the channel, so that the Karl Fischer solution in the burette 51 is quantitatively added into the reaction solution of the titration bottle 2, avoiding the problem of leakage and infection during personnel titration. On the other hand, when the straight column 31 continues to rotate to the unthreaded part of the screw 55, the boss of the smooth rod 53 engages with the slot on the circular plate 56, so that the smooth rod 53 and the screw 55 rotate synchronously with the straight column 31 and no longer descend, avoiding the problem of the smooth rod 53 detaching from the burette 51 and becoming unusable later.

[0036] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A Karl Fischer titrator, characterized in that: The titrator includes a titration bottle (2), an electrode is provided on the titration bottle (2), a corrugated groove (21) is provided inside the titration bottle (2), the corrugated groove (21) is composed of a downward section and an upward section, the depth of the downward section of the corrugated groove (21) is greater than the depth of the upward section, and a uniform unit (3) is provided inside the titration bottle (2). The uniform unit (3) includes a uniform component, which uniformly stirs the reaction liquid by changing the stirring range. The uniform component includes a driving component, a stirring component and an adjusting component. The stirring component and the adjusting component are hinged together, and the driving component and the adjusting component are fixedly connected. The titration bottle (2) is provided with an anti-wall-sticking unit (4). The anti-wall-sticking unit (4) includes an anti-sticking component. The anti-sticking component periodically changes position to remove residual liquid from the inner wall of the titration bottle (2). The anti-sticking component includes a detection element and an anti-sticking element. The anti-sticking element is fixedly connected to an adjustment element. The detection element is fixedly connected to a driving element. The detection element is electrically connected to the anti-sticking element. The anti-sticking element is installed inside the titration bottle (2). A titration unit (5) is provided on the uniform unit (3).

2. A Karl-Fischer titrator according to claim 1, characterized in that The driving component includes a straight column (31), a slider (32), a sleeve (33), and a bent rod (34). An installation platform is provided inside the titration bottle (2). A magnetic rotor is provided at one end of the straight column (31). The magnetic rotor is rotatably connected to the installation platform. A double helical groove is provided on the outer surface of the straight column (31). The slider (32) is slidably connected to the double helical groove of the straight column (31) through a locking block. The sleeve (33) is sleeved on the outer surface of the straight column (31). The sleeve (33) near the bottom of the titration bottle (2) is fixedly connected to the installation platform. The installation platform is rotatably installed at the bottom of the titration bottle (2). The bent rod (34) is fixedly connected to the sleeve (33). A conductive ring is provided on one side of the slider (32). The slider (32) is slidably connected to the bent rod (34) through the conductive ring. An internal thread is provided inside the straight column (31).

3. A Karl-Fischer titrator according to claim 2, characterized in that: The stirring component includes a first straight rod (35), a stirring plate (36) and a second straight rod (37). One end of the first straight rod (35) is hinged to the slider (32), and the other end of the first straight rod (35) is connected to the stirring plate (36) by a spring. One end of the second straight rod (37) is fixedly connected to the stirring plate (36), and the other end of the second straight rod (37) is slidably mounted on the wave groove (21).

4. A Karl Fischer titrator according to claim 2, characterized in that: The adjusting component includes a rotating wedge (38) and a driving wedge (39), the rotating wedge (38) being fixedly connected to a sleeve (33) away from the bottom of the titration bottle (2).

5. A Karl Fischer titrator according to claim 4, characterized in that: The anti-snagging component includes a scraper ring (41) and a memory spring (42). The drive wedge (39) is connected to the scraper ring (41) via a connecting rod. The scraper ring (41) is slidably connected to the inner wall of the titration bottle (2). One end of the memory spring (42) is connected to the scraper ring (41), and the other end of the memory spring (42) is fixedly connected to the cap end of the titration bottle (2).

6. A Karl Fischer titrator according to claim 5, characterized in that: The detection device includes a drive coil, which is evenly wound on the bent rod (34). The drive coil near the bottom of the titration bottle (2) is the current input end. The conductive ring of the slider (32) is electrically connected to the memory spring (42).

7. A Karl Fischer titrator according to claim 1, characterized in that: The titration unit (5) includes a titration component that delivers a quantitative Karl Fischer solution by moving the component. The titration component includes an opening / closing element and a rotating element.

8. A Karl Fischer titrator according to claim 7, characterized in that: The opening and closing components include a burette (51), a push plate (52), a smooth rod (53), and a flap (54). The burette (51) is fixedly installed on the titration bottle (2). The push plate (52) is fixedly connected to the smooth rod (53). One end of the smooth rod (53) is connected to the flap (54) away from the bottom of the titration bottle (2) via a connecting rod. A boss is provided at the end of the smooth rod (53) near the slider (32). The flap (54) is connected to the burette (51) via a torsion spring. The flap (54) is slidably connected to the smooth rod (53).

9. A Karl Fischer titrator according to claim 8, characterized in that: The rotating component includes a screw (55) and a circular plate (56). One end of the screw (55) is fixedly connected to the smooth rod (53), and the other end of the screw (55) is threaded into the straight column (31). The circular plate (56) is fixedly installed on the sleeve (33), and the end of the circular plate (56) near the smooth rod (53) is provided with a groove that matches the boss of the smooth rod (53).

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