Auxiliary observation device for chemical titration test

Abstract

The invention discloses an auxiliary observation device for a chemical titration test, which comprises a display arranged on one side of a box body, a conical flask arranged in the middle of the interior of the box body, a burette arranged at the top of the conical flask, operation holes formed in two sides of the box body, a notch formed in the side surface of the conical flask, and a groove formed in the box body on the outer side of the conical flask, an observation mechanism for shooting the conical flask is arranged on the outer side of the conical flask; a stirring mechanism for stirring the conical flask at a variable speed is arranged on the outer side of the conical flask, the conical flask is shot at different distances through a global camera and a local camera which are different from the conical flask in distance and is stored and displayed on a display, and a solution in a burette is weighed by matching with a balance; the change process of the titration solution is visually seen on the display, the titration amount does not need to just reach the color change degree, the titration end point can be judged according to playback, errors caused by misjudgment of the color change are avoided, and the accuracy of the titration test is improved.

Description

Technical Field

[0001] The present application relates to the field of chemical titration experiments, and in particular to an auxiliary observation device for chemical titration experiments. Background Art

[0002] Chemical titration test is an analytical method that determines the content of a certain solute through the quantitative reaction of two solutions. It has broad application prospects in construction and can be used to detect the content of certain chemical components in building materials, such as the calcium ion content in cement, the active ingredient content in waterproofing agents, etc., to ensure that the quality of building materials meets the specified standards.

[0003] However, in the process of implementing the relevant technical solutions, it was found that at least the following technical problems exist: in the titration test, the solution in the conical flask is generally observed with the naked eye. The titration is stopped when the color of the solution changes, and the titration end point can be determined. However, the naked eye has a large error in judgment. If the color change is misjudged or too much solution is titrated, it will lead to excessive titration, and the test is prone to errors. In addition, bubbles will be generated in the solution when the conical flask is stirred. The bubbles will affect the uniformity of the solution mixing and will also cause obvious visual interference, making it difficult for observers to accurately determine the titration end point. Summary of the invention

[0004] The present application solves the problem in the prior art that the titration endpoint cannot be accurately determined by providing an auxiliary observation device for chemical titration experiments, and realizes the effect of using two cameras at different positions to take local and global photos respectively to facilitate the determination of the titration endpoint.

[0005] The present application provides an auxiliary observation device for chemical titration test, comprising a display arranged on one side of a box body, a conical flask is placed in the middle of the box body, a burette is arranged on the top of the conical flask, operation holes are opened on both sides of the box body, notches are arranged on the sides of the conical flask, a groove is opened on the box body outside the conical flask, and an observation mechanism for photographing the conical flask is arranged on the outside of the conical flask; the observation mechanism comprises: two movable plates, which are arranged on the inner wall of the groove, and the two movable plates are arranged vertically; two connecting rods, which are respectively arranged at different positions on the top of the movable plates; a flexible support member, which is arranged on the connecting rod, and a global camera is arranged on one of the flexible support members away from the conical flask, and a local camera is arranged on the other flexible support member close to the conical flask, the flexible support member is used to slightly adjust the positions of the global camera and the local camera to face the conical flask, and the global camera and the local camera are electrically connected to the display; a stirring mechanism for variable speed stirring of the conical flask is arranged on the outside of the conical flask.

[0006] Furthermore, a rotating assembly for driving the two movable plates to rotate is provided in the groove, and the rotating assembly includes: a gear ring, which is sleeved and rotatably connected to the inner wall of the groove, and the two movable plates are fixedly arranged on the top of the gear ring; a gear, which is meshingly connected to the outer side of the gear ring; a driving motor, which is fixedly installed inside the box body, and the output shaft of the driving motor is fixedly connected to the gear.

[0007] Furthermore, the stirring mechanism comprises an electromagnetic stirrer, the electromagnetic stirrer is arranged in the middle of the box body, and the conical flask is placed on the electromagnetic stirrer.

[0008] Furthermore, a weighing assembly is provided on the top of the conical flask, and the weighing assembly includes: a balance, fixedly mounted on the top of the box body, the balance being electrically connected to a display; a clamping piece, provided on the inner wall of the top of the box body, the conical flask being clamped on the clamping piece, and the balance weighing the mass of the solution inside the burette through the clamping piece.

[0009] Furthermore, the stirring mechanism also includes: a fixed seat, which is arranged on one side of the notch on the side of the conical flask, and a stirring rod is arranged inside the notch on the side of the conical flask; a rotating disk, which is rotatably connected to the middle part of the fixed seat; and an installation component, which is arranged on the rotating disk, and the installation component is used to install the stirring rod.

[0010] Furthermore, the mounting assembly includes: a mounting seat, which is fixedly arranged at the eccentric position of the rotating disk, and a fixing groove is provided at the bottom of the mounting seat; a mounting block, which is arranged at the top of the stirring rod, and the stirring rod is movably connected to the bottom of the mounting block through a universal ball, and the mounting block matches the size of the fixing groove.

[0011] Furthermore, sliding grooves are provided on the inner walls on both sides of the fixing groove, a sliding connection limit block is arranged inside the sliding groove, a spring is arranged between the limit block and the inner wall of the sliding groove, and limit grooves are provided on both sides of the mounting block, and the limit block matches the size of the limit groove.

[0012] Furthermore, the inner thread of the notch on the side of the conical flask is connected with a threaded limiting rod, one end of the threaded limiting rod passes through the stirring rod, and the stirring rod moves around the threaded limiting rod in the notch on the side of the conical flask.

[0013] Furthermore, a support rod is provided on one side of the inner wall of the box body, one end of the support rod is movably connected to a connecting seat through a universal ball, the connecting seat is fixedly connected to the fixing seat, a variable speed motor is provided inside the connecting seat, and the output shaft of the variable speed motor is fixedly connected to the rotating disk.

[0014] Furthermore, a control device is provided inside the display, and the control device is electrically connected to the drive motor, the electromagnetic stirrer and the variable speed motor.

[0015] The technical solution provided by this application has at least the following technical effects or advantages:

[0016] 1. Through the global camera and local camera at different distances from the conical flask, the conical flask is photographed at different distances and stored and displayed on the monitor. The solution in the burette is weighed with a balance, and the change process of the titrated solution can be intuitively seen on the monitor. The two vertically arranged cameras can also avoid blocking the shooting of the conical flask. It is not necessary to titrate the amount exactly to the degree of color change. The titration end point can also be judged based on the playback to avoid errors caused by misjudgment of color change and improve the accuracy of the titration test.

[0017] 2. The stirring rod is driven to rotate around the threaded limit rod in the side notch by the rotation of the rotating disk, and the solution in the conical flask is stirred in two different directions with the electromagnetic stirrer, so that the titrated reagents are quickly mixed evenly to prevent the judgment of the titration end point from being affected by incomplete mixing of the solution.

[0018] 3. Use a local camera to zoom in and shoot a designated position inside the conical flask so that the local camera can observe whether solutions of different colors are mixed evenly, thereby judging whether it is necessary to increase the rotation speed of the battery stirrer and stirring rod. It can also observe whether a large number of bubbles are generated at the camera position during stirring. If the solution mixing is prone to bubbles and there are too many bubbles, the rotation speed can be appropriately reduced or the stirring rod can be removed. By observing whether the mixing is uniform and whether bubbles are generated through the local camera, the rotation speed and stirring method can be changed to more clearly judge the titration end point. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the auxiliary observation device in the embodiment of the present application;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the box body in the embodiment of the present application;

[0021] Figure 3 This is a schematic diagram of the structure of the rotating assembly in the embodiment of the present application;

[0022] Figure 4 This is a schematic diagram of the structure of the stirring mechanism in the embodiment of the present application;

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the mounting base in the embodiment of the present application;

[0024] Figure 6 This is a schematic diagram of the cross-sectional structure of the notch on the side of the conical flask in the embodiment of the present application;

[0025] In the figure: 10, box body; 11, groove; 12, operation hole; 20, display; 30, conical flask; 40, burette; 50, weighing assembly; 60, observation mechanism; 70, stirring mechanism;

[0026] 51. Balance; 52. Clamping piece;

[0027] 61. movable plate; 62. connecting rod; 63. flexible support; 64. global camera; 65. local camera; 66. rotating assembly; 661. gear ring; 662. gear; 663. driving motor;

[0028] 71. Electromagnetic stirrer; 72. Stirring rod; 73. Support rod; 74. Connecting seat; 75. Fixed seat; 76. Rotating plate; 77. Mounting assembly; 771. Mounting seat; 7711. Fixed groove; 7712. Slide groove; 772. Mounting block; 7721. Limiting groove; 773. Limiting block; 774. Spring; 775. Threaded limiting rod. DETAILED DESCRIPTION

[0029] The embodiment of the present application discloses an auxiliary observation device for chemical titration test, which uses a global camera 64 and a local camera 65 at different distances from a conical flask 30 to shoot local and global images. By comparing the shooting results displayed on the conical flask 30, the mass of the solution in the balance 51 at the titration end point can be accurately found when the titration is excessive, thereby determining the titration test result.

[0030] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] Please refer to Figure 1 and Figure 2The present embodiment provides an auxiliary observation device for chemical titration test, including a display 20 arranged on one side of a box body 10, a conical flask 30 is placed in the middle of the box body 10, a burette 40 is arranged on the top of the conical flask 30, operation holes 12 are opened on both sides of the box body 10, a notch is arranged on the side of the conical flask 30, a groove 11 is opened on the box body 10 outside the conical flask 30, an observation mechanism 60 for photographing the conical flask 30 is arranged on the outside of the conical flask 30, a stirring mechanism 70 for variable speed stirring of the conical flask 30 is arranged on the outside of the conical flask 30, a weighing component 50 is arranged on the top of the conical flask 30, and the weighing component 50 includes a balance 51 and a clamping member 52. The balance 51 is fixedly installed on the top of the box body 10. The balance 51 is electrically connected to the conical flask 30. The clamping member 52 is arranged on the inner wall of the top of the box body 10. The conical flask 30 is clamped on the clamping member 52. The balance 51 weighs the mass of the solution inside the burette 40 through the clamping member 52. The burette 40 is clamped and fixed on the top of the conical flask 30 by the clamping member 52. The reagent in the burette 40 can be dripped into the solution in the conical flask 30 by turning on the knob on the burette 40. The balance 51 measures the solution in the burette 40 in a timely manner and transmits it to the display screen for display.

[0032] Please refer to Figure 1 , Figure 2 and Figure 3 The observation mechanism 60 includes a movable plate 61, a connecting rod 62, a flexible support 63, a global camera 64, a local camera 65, and a rotating assembly 66. The two movable plates 61 are arranged on the inner wall of the groove 11, and the two movable plates 61 are arranged vertically. The two connecting rods 62 are respectively arranged at different positions on the top of the movable plates 61. The flexible support 63 is arranged on the connecting rod 62, and the global camera 64 is arranged on a flexible support 63 far away from the conical flask 30. The local camera 65 is arranged on another flexible support 63 close to the conical flask 30. The flexible support 63 is used to The positions of the global camera 64 and the local camera 65 are slightly adjusted to face the conical flask 30. The global camera 64 and the local camera 65 are electrically connected to the conical flask 30. The global camera 64 and the local camera 65 facing the conical flask 30 respectively take photos of the whole and local positions of the conical flask 30, and the photos and videos are stored and displayed on the conical flask 30, so that the titration end point can be found smoothly by comparing the photos taken by the global camera 64 and the local camera 65. There is no need to repeat the test when the titration is excessive. The operation is simple and the test supplies are saved.

[0033] Please refer to Figure 1 , Figure 2 and Figure 3A rotating assembly 66 for driving the two movable plates 61 to rotate is provided in the groove 11. The rotating assembly 66 includes a gear ring 661, a gear 662, and a driving motor 663. The gear ring 661 is sleeved and rotatably connected to the inner wall of the groove 11, and the two movable plates 61 are fixedly provided on the top of the gear ring 661. The gear 662 is meshedly connected to the outer side of the gear ring 661. The driving motor 663 is fixedly installed inside the box body 10. The output shaft of the driving motor 663 is fixedly connected to the gear 662. The output shaft of the driving motor 663 drives the rotation of the gear 662, so that the gear 662 drives the meshing gear ring 661 to rotate, so that the two movable plates 61 on the gear ring 661 drive the global camera 64 and the local camera 65 to rotate to a suitable angle to shoot and record the conical flask 30, so as to prevent the side notch of the conical flask 30 from blocking the shooting and recording of the global camera 64 and the local camera 65, and the solution in the conical flask 30 can also be shot at different angles.

[0034] Please refer to Figure 1-Figure 4, the stirring mechanism 70 includes an electromagnetic stirrer 71, a stirring rod 72, a support rod 73, a connecting seat 74, a fixing seat 75, a rotating disk 76, and a mounting assembly 77. The electromagnetic stirrer 71 is arranged in the middle of the box body 10, and the conical flask 30 is placed on the electromagnetic stirrer 71, the stirring rod 72 is arranged inside the side notch of the conical flask 30, the fixing seat 75 is arranged on one side of the side notch of the conical flask 30, the rotating disk 76 is rotatably connected to the middle of the fixing seat 75, the support rod 73 is arranged on the inner wall of the box body 10, the connecting seat 74 is movably connected to one end of the support rod 73 through a universal ball, the connecting seat 74 is fixed to the fixing seat 75, a variable speed motor is arranged inside the connecting seat 74, the output shaft of the variable speed motor is fixedly connected to the rotating disk 76, the mounting assembly 77 is arranged on the rotating disk 76, and the mounting assembly 77 is used to install the stirring rod 72, a control device is arranged inside the display 20, the control device is electrically connected to the drive motor 663, the electromagnetic stirrer 71 and the variable speed motor, by adjusting The angle between the connecting seat 74 and the notch on the side of the conical flask 30 allows the fixing seat 75 to face the notch on the side of the conical flask 30, which is convenient for installing the stirring rod 72. The variable speed motor inside the connecting seat 74 drives the rotating disk 76 to rotate on the fixing seat 75, thereby driving the mounting assembly 77 on the rotating disk 76 to drive the stirring rod 72 to perform stirring work, and the solution inside the conical flask 30 is stirred in cooperation with the magnetic field change of the electromagnetic stirrer 71. The solution is stirred in different directions. By changing the stirring direction, the original fluid flow pattern can be broken, so that the solute in the solution is more evenly distributed, the mixing effect is improved, and the solution titrated in the conical flask 30 can be quickly mixed and uniformly. The speed of stirring the solution inside the conical flask 30 can be changed by changing the magnetic field of the electromagnetic stirrer 71 and the speed of the variable speed motor. By cooperating with the local camera 65 to shoot the local part of the conical flask 30, the stirring speed can be adjusted to a suitable value, and uneven stirring and excessive bubbles will not occur.

[0035] Please refer to Figure 1-Figure 6The mounting assembly 77 includes a mounting seat 771, a mounting block 772, a limiting block 773, a spring 774, and a threaded limiting rod 775. The mounting seat 771 is fixedly arranged at the eccentric position of the rotating disk 76, and a fixing groove 7711 is provided at the bottom of the mounting seat 771. The mounting block 772 is arranged at the top of the stirring rod 72, and the stirring rod 72 is movably connected to the bottom of the mounting block 772 through a universal ball. The mounting block 772 matches the size of the fixing groove 7711. The inner walls on both sides of the fixing groove 7711 are provided with sliding grooves 7712. The limiting block 773 is slidably connected to the inside of the sliding groove 7712. The spring 77 4 is arranged between the limiting block 773 and the inner wall of the slide groove 7712, and limiting grooves 7721 are provided on both sides of the mounting block 772. The limiting block 773 matches the limiting groove 7721 in size. The inner thread of the notch on the side of the conical flask 30 is connected with a threaded limiting rod 775. The threaded limiting rod 775 can be removed from the notch, and the stirring rod 72 can be taken out from the conical flask 30. One end of the threaded limiting rod 775 passes through the stirring rod 72. The stirring rod 72 moves around the threaded limiting rod 775 in the notch on the side of the conical flask 30, and extends into the fixing groove 7711 through the mounting block 772 to squeeze the limiting block 773, so as to be removed from the conical flask 30. The limit block 773 is retracted into the slide groove 7712, the spring 774 is compressed, and the limit grooves 7721 on both sides of the mounting block 772 are aligned with the slide groove 7712, and the elastic force of the spring 774 drives the limit block 773 to extend into the limit groove 7721, and the mounting block 772 is installed in the mounting seat 771, and the position of the top of the stirring rod 72 is fixed. The top of the stirring rod 72 can move on the mounting block 772, and the middle part of the stirring rod 72 is limited by the threaded limit rod 775 in the notch on the side of the conical flask 30, so that when the rotating disk 76 drives the mounting seat 771 to rotate around the center of the circle, the stirring rod 72 rotates with the mounting seat 771 rotates around the threaded limit rod 775, so that the stirring rod 72 extends into one end of the conical flask 30 to stir the solution. If the solution is not mixed quickly in the video shot by the local camera 65, the stirring speed inside the conical flask 30 is accelerated to improve the stirring efficiency. If a large number of bubbles appear in the solution in the video shot by the local camera 65, which affects the observation of color changes, the stirring speed inside the conical flask 30 is reduced, or the stirring rod 72 is taken out of the notch of the conical flask 30, which can reduce the generation of bubbles in the solution, make the stirring speed in the solution at an appropriate value, and improve the accuracy of the test.

[0036] This application can explain its functional principle through the following operation methods:

[0037] When in use, the conical flask 30 is placed in the electromagnetic stirrer 71 on the box body 10, and the angles of the two flexible support members 63 are adjusted so that the global camera 64 and the local camera 65 are in a suitable position to shoot the conical flask 30, and the burette 40 is clamped on the clamping member 52. The balance 51 measures the mass change inside the burette 40. When it is necessary to change the shooting angles of the global camera 64 and the local camera 65, the drive motor 663 is started so that the output shaft of the drive motor 663 drives the gear 662 to rotate, thereby driving the gear ring 661 meshing with it to rotate, and the gear ring 661 drives the two vertically arranged movable plates 61 to rotate in the groove 11, thereby changing the angles of the global camera 64 and the local camera 65 on the two movable plates 61. The vertically arranged global camera 64 and the local camera 65 can prevent each other from being blocked. The cam 772 is then rotated to release the locking cam 775 from the locking cam 76 so that the locking cam 76 can be locked in the locking cam 76.

[0038] During the test, the knob on the burette 40 is unscrewed, so that the reagent in the burette 40 can be dripped into the conical flask 30 steadily and slowly, and the electromagnetic stirrer 71 at the bottom of the conical flask 30 and the variable speed motor inside the connecting seat 74 are started, so that the magnetic field generated by the electromagnetic stirrer 71 drives the solution inside the conical flask 30 to rotate, and the variable speed motor drives the rotating disk 76 on the fixing seat 75 to rotate, so that the rotating disk 76 drives the mounting seat 771 fixed thereto to rotate around the center of the circle, so that the mounting seat 771 drives the mounting block 772 on the top of the stirring rod 72 to change its position, and the stirring rod 72 rotates around the conical flask with the rotation of the rotating disk 76. The threaded stopper rod 775 in the notch on the side of the conical flask 30 rotates, so that the end of the stirring rod 72 extending into the solution of the conical flask 30 drives the solution to rotate. The stirring in two different directions can break the original fluid flow pattern, so that the solute in the solution is more evenly distributed, and the mixing effect is improved. The global camera 64 and the local camera 65 at different distances outside the conical flask 30 transmit the captured video to the display 20, which is stored and displayed on the display 20. By observing the color change of the solution in the video on the display 20, and comparing the video of the global camera 64 and the local camera 65, the titration end point can be more accurately determined;

[0039] If the titrated reagent is not mixed evenly for a long time in the video taken by the local camera 65, it is necessary to increase the speed of the electromagnetic stirrer 71 and the variable speed motor to drive the solution in the conical flask 30 to stir, so as to improve the stirring effect. If there are many bubbles in the video taken by the global camera 64 and the local camera 65, it is necessary to reduce the speed of the electromagnetic stirrer 71 and the variable speed motor to drive the solution in the conical flask 30 to stir, or unscrew the threaded limit rod 775, and take the stirring rod 72 out of the mounting seat 771 and the side notch of the display 20, so as to reduce the generation of bubbles and observe the conical flask 30. The photos taken by the global camera 64 and the local camera 65 are used to determine the appropriate stirring speed and stirring method for the solution in the conical flask 30. When the solution in the conical flask 30 is left to stand, if there are still bubbles in the conical flask 30 that have not been discharged, the stirring rod 72 can be adjusted to rotate slowly to drive the bubbles to rise to the liquid surface to discharge the bubbles. The color change of the solution in the conical flask 30 can be replayed on the conical flask 30 to observe that the color changes to the same color as the standard test, indicating that the test is standardized and correct. At this time, the balance 51 measures the mass of the reagent in the burette 40 to obtain the test result, and the chemical titration test is completed.

[0040] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0041] What has been described above is only a preferred specific implementation manner of the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. An auxiliary observation device for chemical titration test, comprising a display (20) arranged on one side of a box body (10), a conical flask (30) is placed in the middle of the box body (10), a burette (40) is arranged on the top of the conical flask (30), and operation holes (12) are opened on both sides of the box body (10), characterized in that: The side of the conical flask (30) is provided with a notch, the box body (10) outside the conical flask (30) is provided with a groove (11), and the outside of the conical flask (30) is provided with an observation mechanism (60) for photographing the conical flask (30); The observation mechanism (60) comprises: Two movable plates (61) are arranged on the inner wall of the groove (11), and the two movable plates (61) are arranged vertically; Two connecting rods (62) are respectively arranged at different positions on the top of the movable plate (61); A flexible support member (63) is arranged on the connecting rod (62), and a global camera (64) is arranged on one of the flexible support members (63) away from the conical flask (30), and a local camera (65) is arranged on the other flexible support member (63) close to the conical flask (30), the flexible support member (63) is used to slightly adjust the positions of the global camera (64) and the local camera (65) so as to face the conical flask (30), and the global camera (64) and the local camera (65) are electrically connected to the display (20); The outer side of the conical flask (30) is provided with a stirring mechanism (70) for stirring the conical flask (30) at a variable speed.

2. The auxiliary observation device for chemical titration test according to claim 1, characterized in that: A rotating assembly (66) for driving the two movable plates (61) to rotate is arranged in the groove (11), and the rotating assembly (66) comprises: A gear ring (661) is sleeved and rotatably connected to the inner wall of the groove (11), and the two movable plates (61) are fixedly arranged on the top of the gear ring (661); a gear (662) meshingly connected to the outer side of the gear ring (661); The driving motor (663) is fixedly installed inside the box body (10), and the output shaft of the driving motor (663) is fixedly connected to the gear (662).

3. A chemical titration test auxiliary observation device as claimed in claim 2, characterized in that: The stirring mechanism (70) comprises an electromagnetic stirrer (71), the electromagnetic stirrer (71) is arranged in the middle of the box body (10), and the conical flask (30) is placed on the electromagnetic stirrer (71).

4. The auxiliary observation device for chemical titration test according to claim 1, characterized in that: A weighing assembly (50) is disposed on the top of the conical flask (30), and the weighing assembly (50) comprises: A balance (51) is fixedly mounted on the top of the box body (10), and the balance (51) is electrically connected to the display (20); The clamping member (52) is arranged on the inner wall of the top of the box body (10), the conical flask (30) is clamped on the clamping member (52), and the balance (51) weighs the mass of the solution inside the burette (40) through the clamping member (52).

5. The auxiliary observation device for chemical titration test as claimed in claim 3, characterized in that: The stirring mechanism (70) further comprises: A fixing seat (75) is arranged on one side of a notch on the side of the conical flask (30), and a stirring rod (72) is arranged inside the notch on the side of the conical flask (30); A rotating disk (76) rotatably connected to the middle portion of the fixing seat (75); The mounting assembly (77) is arranged on the rotating disk (76), and the mounting assembly (77) is used to mount the stirring rod (72).

6. A chemical titration test auxiliary observation device as claimed in claim 5, characterized in that: The mounting assembly (77) comprises: A mounting seat (771) is fixedly disposed at an eccentric position of the rotating disk (76), and a fixing groove (7711) is provided at the bottom of the mounting seat (771); The mounting block (772) is arranged on the top of the stirring rod (72), and the stirring rod (72) is movably connected to the bottom of the mounting block (772) through a universal ball, and the size of the mounting block (772) matches that of the fixing groove (7711).

7. The auxiliary observation device for chemical titration test according to claim 6, characterized in that: The inner walls on both sides of the fixed groove (7711) are provided with sliding grooves (7712), a sliding connection limit block (773) is arranged inside the sliding groove (7712), a spring (774) is arranged between the limit block (773) and the inner wall of the sliding groove (7712), and the limiting grooves (7721) are provided on both sides of the mounting block (772), and the size of the limit block (773) matches that of the limit groove (7721).

8. The auxiliary observation device for chemical titration test according to claim 5, characterized in that: The inner thread of the side notch of the conical flask (30) is connected with a threaded limiting rod (775), one end of the threaded limiting rod (775) passes through the stirring rod (72), and the stirring rod (72) moves around the threaded limiting rod (775) in the side notch of the conical flask (30).

9. The auxiliary observation device for chemical titration test according to claim 5, characterized in that: A support rod (73) is provided on one side of the inner wall of the box body (10), one end of the support rod (73) is movably connected to a connecting seat (74) via a universal ball, the connecting seat (74) is fixedly connected to the fixing seat (75), a variable speed motor is provided inside the connecting seat (74), and the output shaft of the variable speed motor is fixedly connected to the rotating disk (76).

10. The auxiliary observation device for chemical titration test according to claim 9, characterized in that: A control device is provided inside the display (20), and the control device is electrically connected to the drive motor (663), the electromagnetic stirrer (71) and the variable speed motor.

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