An auxiliary observation device for chemical titration test

Abstract

The application discloses an auxiliary observation device for chemical titration test, which comprises a display arranged on one side of a box body, a conical flask arranged in the middle of the inside of the box body, a burette arranged on the top of the conical flask, operation holes arranged on the two sides of the box body, notches arranged on the side of the conical flask, grooves arranged on the box body outside the conical flask, and an observation mechanism arranged on the outside of the conical flask and used for shooting the conical flask; a stirring mechanism arranged on the outside of the conical flask and used for variable-speed stirring of the conical flask; the conical flask is shot at different distances by global cameras and local cameras with different distances from the conical flask, and the shooting is stored and displayed on the display; the solution in the burette is weighed by cooperation with a balance; the change process of the titration solution can be directly observed on the display; the amount of the titration need not reach the color change degree; the titration end point can be judged according to playback; errors caused by misjudgment of color change are avoided; and the accuracy of the titration test is improved.

Description

Technical Field

[0001] This application relates to the field of chemical titration testing, and more particularly to an auxiliary observation device for chemical titration testing. Background Technology

[0002] Chemical titration is an analytical method that determines the content of a solute by quantitatively reacting 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 and the content of active ingredients in waterproofing agents, thereby ensuring that the quality of building materials meets the prescribed standards.

[0003] However, during the implementation of the relevant technical solutions, at least the following technical problems were found: In titration experiments, the solution in the conical flask is generally observed with the naked eye. The titration is stopped when the solution color changes, and the titration endpoint can be determined. However, the error of visual judgment is relatively large. If the color change is misjudged or too much solution is titrated, it will lead to over-titration, and the experiment is prone to errors. In addition, bubbles will be generated in the solution when stirring the conical flask. Bubbles will affect the uniformity of solution mixing and will also create obvious visual interference, making it difficult for the observer to accurately determine the titration endpoint. Summary of the Invention

[0004] This application provides an auxiliary observation device for chemical titration experiments, which solves the problem of inaccurate determination of the titration endpoint in the prior art. It enables the use of two cameras at different positions to take local and global photos respectively, which facilitates the determination of the titration endpoint.

[0005] This application provides an auxiliary observation device for chemical titration experiments, including a display screen mounted on one side of a chamber. A conical flask is placed in the center of the chamber, and a burette is mounted on the top of the conical flask. Operating holes are provided on both sides of the chamber, and slots are provided on the sides of the conical flask. A groove is provided on the outer side of the chamber, and an observation mechanism for photographing the conical flask is provided on the outer side of the conical flask. The observation mechanism includes: two movable plates mounted on the inner wall of the groove, with the two movable plates arranged vertically; two connecting rods, respectively mounted at different positions on the top of the movable plates; a flexible support member mounted on the connecting rods, with a global camera mounted on one flexible support member away from the conical flask and a local camera mounted on the other flexible support member closer 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 directly. The global camera and the local camera are electrically connected to the display screen. A stirring mechanism for variable-speed stirring of the conical flask is provided on the outer side of the conical flask.

[0006] Furthermore, a rotating assembly for driving the two movable plates to rotate is provided in the groove. 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 disposed on the top of the gear ring; a gear, which is meshed with the outer side of the gear ring; and a drive motor, which is fixedly installed inside the housing, and the output shaft of the drive motor is fixedly connected to the gear.

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

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

[0009] Furthermore, the stirring mechanism further includes: a fixed base, disposed on one side of the groove on the side of the conical flask, wherein a stirring rod is disposed inside the groove on the side of the conical flask; a rotating disk, rotatably connected to the middle of the fixed base; and a mounting assembly, disposed on the rotating disk, wherein the mounting assembly is used to mount the stirring rod.

[0010] Furthermore, the mounting assembly includes: a mounting base, fixedly disposed at the eccentric position of the rotating disk, and the bottom of the mounting base having a fixing groove; and a mounting block, disposed at the top of the stirring rod, and the stirring rod being movably connected to the bottom of the mounting block via a universal ball joint, the mounting block being sized to match the fixing groove.

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

[0012] Furthermore, a threaded limiting rod is threadedly connected to the inside of the groove on the side of the conical flask. One end of the threaded limiting rod passes through the stirring rod, and the stirring rod moves around the threaded limiting rod inside the groove 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, and one end of the support rod is movably connected to a connecting seat via a universal ball joint. The connecting seat is fixedly connected to the fixed seat, and a variable speed motor is provided inside the connecting seat. The output shaft of the variable speed motor is fixedly connected to the rotating disk.

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

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

[0016] 1. Using a global camera and a local camera at different distances from the conical flask, the conical flask is photographed at different distances, and the images are stored and displayed on the monitor. Combined with the weighing of the solution in the burette using a balance, the change process of the titration solution can be seen intuitively on the monitor. The two vertically set cameras can also avoid obstructing the view of the conical flask. It is not necessary to titrate exactly to the degree of color change. The titration endpoint can also be determined by playback, avoiding errors caused by misjudgment of color change and improving the accuracy of titration experiments.

[0017] 2. The rotation of the rotating disk drives the stirring rod to rotate around the threaded limit rod in the side groove. Together with the electromagnetic stirrer, the solution in the conical flask is stirred in two different directions, so that the titration reagent is quickly and evenly mixed, preventing the determination of the titration endpoint from being affected by incomplete mixing of the solution.

[0018] 3. By using a local camera to magnify and photograph a designated area inside the conical flask, the camera can observe whether solutions of different colors are mixed evenly. This allows the camera to determine whether the speed of the battery stirrer and stirring rod needs to be increased. It can also observe whether a large number of bubbles are generated at the camera position during stirring. If the solution mixing easily produces a lot of bubbles, the speed can be appropriately reduced or the stirring rod can be removed. By observing whether the mixing is even and whether bubbles are generated through the local camera, the speed and stirring method can be changed to more clearly determine the titration endpoint. Attached Figure Description

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

[0020] Figure 2 This is a cross-sectional structural diagram of the box body in an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the rotating component in an embodiment of this application;

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

[0023] Figure 5 This is a cross-sectional structural diagram of the mounting base in an embodiment of this application;

[0024] Figure 6 This is a schematic cross-sectional view of the groove on the side of the conical bottle in an embodiment of this application;

[0025] In the diagram: 10. Box body; 11. Groove; 12. Operating hole; 20. Display; 30. Conical flask; 40. Burette; 50. Weighing assembly; 60. Observation mechanism; 70. Stirring mechanism;

[0026] 51. Balance scale; 52. Clamping components;

[0027] 61. Movable plate; 62. Connecting rod; 63. Flexible support component; 64. Global camera; 65. Local camera; 66. Rotating assembly; 661. Gear ring; 662. Gear; 663. Drive motor;

[0028] 71. Electromagnetic stirrer; 72. Stirring rod; 73. Support rod; 74. Connecting seat; 75. Fixed seat; 76. Rotating disc; 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 Implementation

[0029] This application discloses an auxiliary observation device for chemical titration experiments. By using a global camera 64 and a local camera 65 at different distances from the conical flask 30, the device captures images of the local and global areas. By comparing the captured images displayed on the conical flask 30, the mass of the solution in the balance 51 at the titration endpoint can be accurately determined even in cases of titration overdose, thereby confirming the titration test results.

[0030] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0031] Please refer to Figure 1 and Figure 2This embodiment provides an auxiliary observation device for chemical titration experiments, including a display 20 mounted on one side of a housing 10, a conical flask 30 placed in the center of the housing 10, a burette 40 mounted on the top of the conical flask 30, operation holes 12 on both sides of the housing 10, slots on the sides of the conical flask 30, grooves 11 on the outer side of the housing 10 of the conical flask 30, an observation mechanism 60 for photographing the conical flask 30 mounted on the outer side of the conical flask 30, a stirring mechanism 70 for variable-speed stirring of the conical flask 30 mounted on the outer side of the conical flask 30, and a weighing assembly 50 mounted on the top of the conical flask 30. Unit 50 includes a balance 51 and a clamping member 52. The balance 51 is fixedly installed on the top of the housing 10 and is electrically connected to the conical flask 30. The clamping member 52 is set on the inner wall of the top of the housing 10. The burette 40 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. The burette 40 is clamped and fixed to 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 opening the knob on the burette 40. The balance 51 measures the solution in the burette 40 in a timely manner and transmits the data to the display screen for display.

[0032] Please refer to Figure 1 , Figure 2 and Figure 3 The observation mechanism 60 includes movable plates 61, connecting rods 62, flexible support members 63, a global camera 64, a local camera 65, and a rotating assembly 66. Two movable plates 61 are disposed on the inner wall of the groove 11 and are vertically arranged. Two connecting rods 62 are respectively disposed at different positions on the top of the movable plates 61. The flexible support member 63 is disposed on the connecting rods 62. The global camera 64 is disposed on one flexible support member 63 away from the conical flask 30, and the local camera 65 is disposed on the other flexible support member 63 closer to the conical flask 30. The flexible support member 63 is used for… 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 pictures of the whole and local positions of the conical flask 30, and store and display the photos and videos on the conical flask 30. This allows the titration endpoint to be easily found by comparing the photos taken by the global camera 64 and the local camera 65. In case of titration over-titration, it is not necessary to repeat the test. The operation is simple and saves test materials.

[0033] Please refer to Figure 1 , Figure 2 and Figure 3The groove 11 is equipped with a rotating assembly 66 for driving the two movable plates 61 to rotate. The rotating assembly 66 includes a gear ring 661, a gear 662, and a drive motor 663. The gear ring 661 is fitted and rotatably connected to the inner wall of the groove 11, and the two movable plates 61 are fixedly set on the top of the gear ring 661. The gear 662 is meshed with the outer side of the gear ring 661. The drive motor 663 is fixedly installed inside the housing 10. The output shaft of the drive motor 663 is fixedly connected to the gear 662. The output shaft of the drive motor 663 drives the gear 662 to rotate, thereby causing the gear 662 to drive the meshed gear ring 661 to rotate. This causes the two movable plates 61 on the gear ring 661 to rotate the global camera 64 and the local camera 65 to a suitable angle to take pictures and record videos of the conical flask 30. This prevents the side opening of the conical flask 30 from obstructing the pictures and videos taken by the global camera 64 and the local camera 65. It can also take pictures of the solution inside the conical flask 30 from different angles.

[0034] Please refer to Figures 1-4The stirring mechanism 70 includes an electromagnetic stirrer 71, a stirring rod 72, a support rod 73, a connecting seat 74, a fixed seat 75, a rotating disk 76, and a mounting assembly 77. The electromagnetic stirrer 71 is located in the middle of the housing 10, and the conical flask 30 is placed on the electromagnetic stirrer 71. The stirring rod 72 is located inside the side groove of the conical flask 30. The fixed seat 75 is located on one side of the side groove of the conical flask 30. The rotating disk 76 is rotatably connected to the middle of the fixed seat 75. The support rod 73 is located on the inner wall of the housing 10. The connecting seat 74 is movably connected to one end of the support rod 73 via a universal ball joint. The connecting seat 74 is fixed to the fixed seat 75. A variable speed motor is installed 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 located on the rotating disk 76 and is used to install the stirring rod 72. The display 20 has a control device inside. 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 side groove of the conical flask 30 allows the fixing seat 75 to face the side groove of the conical flask 30, facilitating the installation of 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 component 77 on the rotating disk 76 to drive the stirring rod 72 to perform stirring. Combined with the magnetic field changes of the electromagnetic stirrer 71, the solution inside the conical flask 30 is stirred. By stirring the solution in different directions and changing the stirring direction, the original fluid flow pattern can be broken, making the solute in the solution more evenly distributed and improving the mixing effect. This allows the solution titrated in the conical flask 30 to be quickly and evenly mixed. By changing the magnetic field of the electromagnetic stirrer 71 and the speed of the variable speed motor, the stirring speed of the solution inside the conical flask 30 can be changed. Combined with the partial camera 65 capturing a part of the conical flask 30, the stirring speed can be adjusted to a suitable value, preventing uneven stirring and excessive bubbles.

[0035] Please refer to Figures 1-6The mounting assembly 77 includes a mounting base 771, a mounting block 772, a limiting block 773, a spring 774, and a threaded limiting rod 775. The mounting base 771 is fixedly mounted on the eccentric part of the rotating disk 76, and a fixing groove 7711 is formed at the bottom of the mounting base 771. The mounting block 772 is set on the top of the stirring rod 72, and the stirring rod 72 is movably connected to the bottom of the mounting block 772 via a universal ball joint. The mounting block 772 matches the size of the fixing groove 7711. Sliding grooves 7712 are formed on both inner walls of the fixing groove 7711. The limiting block 773 is slidably connected to the inside of the sliding groove 7712. The spring 774... 4. A limiting groove 7721 is provided on both sides of the mounting block 772, which is located between the inner wall of the limiting block 773 and the sliding groove 7712. The limiting block 773 and the limiting groove 7721 are matched in size. A threaded limiting rod 775 is threadedly connected to the inner wall of the groove on the side of the conical flask 30. The threaded limiting rod 775 can be removed from the groove, so that 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 groove on the side of the conical flask 30. The mounting block 772 extends into the fixing groove 7711 and presses against the limiting block 773. This causes the limiting block 773 to retract into the slide groove 7712, compressing the spring 774. When the limiting grooves 7721 on both sides of the mounting block 772 align with the slide groove 7712, the elastic force of the spring 774 drives the limiting block 773 to extend into the limiting groove 7721, installing the mounting block 772 into the mounting base 771 and fixing the position of the top of the stirring rod 72. The top of the stirring rod 72 can move on the mounting block 772. The middle part of the stirring rod 72 is limited by the threaded limiting rod 775 in the groove on the side of the conical bottle 30. When the rotating disk 76 drives the mounting base 771 to rotate around the center, the stirring rod 72 moves with the mounting base. The rotation of 771 around the threaded limiting rod 775 causes the stirring rod 72 to extend into one end of the conical flask 30 to stir the solution. If the solution is not mixed quickly in the video captured 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 captured by the local camera 65, affecting the observation of color changes, the stirring speed inside the conical flask 30 is reduced, or the stirring rod 72 is removed from the groove of the conical flask 30, which can reduce the generation of bubbles in the solution, make the stirring speed in the solution appropriate, and improve the accuracy of the experiment.

[0036] The functional principle of this application can be explained through the following methods:

[0037] In use, the conical flask 30 is placed inside the electromagnetic stirrer 71 on the housing 10. The angles of the two flexible support members 63 are adjusted so that the global camera 64 and the local camera 65 are positioned directly facing the conical flask 30 for imaging. The burette 40 is clamped onto the clamping member 52, and the balance 51 measures the change in mass inside the burette 40. When it is necessary to change the shooting angle of the global camera 64 and the local camera 65, the drive motor 663 is started, causing the output shaft of the drive motor 663 to drive the gear 662 to rotate, thereby driving the gear ring 661 meshing with it to rotate. The gear ring 661 drives the two vertically set movable plates 61 to rotate within the groove 11, changing the angle of the global camera 64 and the local camera 65 on the two movable plates 61. The vertically set global camera 64 and local camera 65 can prevent each other from obstructing each other. Stirring rod 72 is inserted into the side groove on conical flask 30. The threaded limiting rod 775 is rotated so that it is inserted into stirring rod 72, allowing stirring rod 72 to move only on threaded limiting rod 775. The angle of connecting seat 74 is then adjusted so that fixing seat 75 is directly opposite the side groove of conical flask 30. The mounting block 772 at the top of stirring rod 72 is inserted into fixing groove 7711 in mounting seat 771. The insertion of mounting block 772 causes limiting blocks 773 on both sides of fixing groove 7711 to retract into sliding groove 7712, compressing spring 774. When limiting groove 7721 on both sides of mounting block 772 moves to the position aligned with sliding groove 7712, the elastic force of spring 774 causes limiting block 773 to insert into limiting groove 7721, fixing mounting block 772 in mounting seat 771, thus completing the installation of stirring rod 72.

[0038] During the experiment, the knob on the burette 40 is turned off, allowing the reagent in the burette 40 to drip steadily and slowly into the conical flask 30. The electromagnetic stirrer 71 at the bottom of the conical flask 30 and the variable speed motor inside the connecting seat 74 are then activated. The magnetic field generated by the electromagnetic stirrer 71 causes the solution inside the conical flask 30 to rotate. The variable speed motor drives the rotating disk 76 on the fixed seat 75 to rotate, causing the rotating disk 76 to drive the mounting seat 771 fixed to it to rotate around the center. This causes the mounting seat 771 to change the position of the mounting block 772 at the top of the stirring rod 72. The stirring rod 72 rotates around the conical flask with the rotation of the rotating disk 76. The threaded limiting rod 775 inside the side groove of the conical flask rotates, causing the end of the stirring rod 72 to extend into the solution in the conical flask 30 and drive the solution to rotate. The stirring in two different directions can break the original fluid flow pattern, making the solute in the solution more evenly distributed and improving the mixing effect. The global camera 64 and the local camera 65 at different distances on the outside of the conical flask 30 transmit the video recordings to the display 20, store and display them on the display 20. By observing the color change of the solution in the video recording on the display 20 and comparing the video recordings of the global camera 64 and the local camera 65, the titration endpoint can be determined more accurately.

[0039] If the titrated reagent is not mixed evenly for a long time in the video captured by the local camera 65, the stirring speed of the electromagnetic stirrer 71 and the variable speed motor driving the solution inside the conical flask 30 needs to be increased to improve the stirring effect. If there are many bubbles in the video captured by the global camera 64 and the local camera 65, the stirring speed of the electromagnetic stirrer 71 and the variable speed motor driving the solution inside the conical flask 30 needs to be decreased, or the threaded limit rod 775 can be unscrewed and the stirring rod 72 removed from the mounting base 771 and the side slot of the display 20 to reduce the generation of bubbles. Observe the conical flask 30. The images from the global camera 64 and the local camera 65 determine the appropriate stirring speed and method for the solution inside the conical flask 30. If air bubbles remain inside the conical flask 30 while the solution is settling, the stirring rod 72 can be adjusted to slowly rotate, causing the air bubbles to rise to the liquid surface and be expelled. The color change of the solution inside the conical flask 30 can be observed by replaying the image on the conical flask 30. When the color change is consistent with the color of the standard test, it indicates that the test is standardized and correct. At this time, the mass of the reagent in the burette 40 is measured by the balance 51 to obtain the test result, thus completing the chemical titration test.

[0040] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

[0041] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present application, based on the technical solution and concept of the present application, should be covered within the scope of protection of the present application.

Claims

1. An auxiliary observation device for chemical titration experiments, comprising a display (20) disposed on one side of a housing (10), a conical flask (30) placed in the middle of the housing (10), a burette (40) disposed on the top of the conical flask (30), and operating holes (12) provided on both sides of the housing (10), characterized in that, The conical flask (30) has a slot on its side, and a groove (11) is provided on the box body (10) on the outside of the conical flask (30). An observation mechanism (60) for photographing the conical flask (30) is provided on the outside of the conical flask (30). The observation facility (60) includes: Two movable plates (61) are disposed on the inner wall of the groove (11), and the two movable plates (61) are arranged vertically; Two connecting rods (62) are respectively set at different positions on the top of the movable plate (61); a flexible support (63) is set on the connecting rods (62), and a global camera (64) is set on one of the flexible support (63) away from the conical bottle (30), and a local camera (65) is set on the other flexible support (63) close to the conical bottle (30). The flexible support (63) is used to slightly adjust the position of the global camera (64) and the local camera (65) to face the conical bottle (30). The global camera (64) and the local camera (65) are electrically connected to the display (20). The conical flask (30) is provided with a stirring mechanism (70) for variable-speed stirring of the conical flask (30) on its outer side; the stirring mechanism (70) includes: An electromagnetic stirrer (71) is disposed at the bottom of the conical flask (30); A stirring rod (72) is disposed inside the conical flask (30), and the stirring rod (72) is magnetically coupled to the electromagnetic stirrer (71); The conical flask (30) has an internal threaded connection to a threaded limiting rod (775) in the side groove. 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 side groove of the conical flask (30) to remove the stirring rod (72) from the conical flask (30) and temporarily fix it to the side wall of the box body (10). The display (20) is equipped with a control device, which is electrically connected to the electromagnetic stirrer (71) and is used to adjust the stirring speed of the electromagnetic stirrer (71) according to the solution mixing uniformity or bubble generation in the video recordings taken by the global camera (64) and the local camera (65).

2. The auxiliary observation device for chemical titration experiments as described in claim 1, characterized in that, The groove (11) is provided with a rotating assembly (66) for driving the two movable plates (61) to rotate. The rotating assembly (66) includes: A gear ring (661) is fitted and rotatably connected to the inner wall of the groove (11), and two movable plates (61) are fixedly disposed on the top of the gear ring (661); Gear (662) meshes with the outer side of the gear ring (661); The drive motor (663) is fixedly installed inside the housing (10), and the output shaft of the drive motor (663) is fixedly connected to the gear (662).

3. The auxiliary observation device for chemical titration experiments as described in claim 1, characterized in that, A weighing assembly (50) is provided at the top of the conical flask (30), the weighing assembly (50) comprising: The balance (51) is fixedly installed on the top of the box body (10), and the balance (51) is electrically connected to the display (20); A clamping member (52) is disposed on the inner wall of the top of the box body (10). The burette (40) 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).

4. The auxiliary observation device for chemical titration experiments as described in claim 1, characterized in that, The stirring mechanism (70) further includes: A fixing seat (75) is provided on one side of the groove on the side of the conical bottle (30); Rotating disk (76) is rotatably connected to the middle of the fixed base (75); Mounting assembly (77) is disposed on the rotating disk (76) and the mounting assembly (77) is used to mount the stirring rod (72).

5. The auxiliary observation device for chemical titration experiments as described in claim 4, characterized in that, The installation component (77) includes: The mounting base (771) is fixedly disposed at the eccentric position of the rotating disk (76), and a fixing groove (7711) is provided at the bottom of the mounting base (771). The mounting block (772) is located on the top of the stirring rod (72), and the stirring rod (72) is movably connected to the bottom of the mounting block (772) via a universal ball joint. The mounting block (772) is sized to match the fixing groove (7711).

6. The auxiliary observation device for chemical titration experiments as described in claim 5, characterized in that, The inner walls of both sides of the fixing groove (7711) are provided with sliding grooves (7712). A sliding connection limit block (773) is provided inside the sliding groove (7712). A spring (774) is provided between the limit block (773) and the inner wall of the sliding groove (7712). Limit grooves (7721) are provided on both sides of the mounting block (772). The size of the limit block (773) matches that of the limit groove (7721).

7. The auxiliary observation device for chemical titration experiments as described in claim 4, 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 fixed seat (75). A variable speed motor is provided inside the connecting seat (74). The output shaft of the variable speed motor is fixedly connected to the rotating disk (76).

Images