Leakage-proof titration device

Abstract

The utility model discloses an anti-leakage titration device, which relates to the technical field of titration experiments and comprises a base, a magnetic stirrer is mounted at the upper end of the base, an electric telescopic rod is vertically mounted at the upper end of the base on one side of the magnetic stirrer, and a potential detection module is mounted at the output end of the electric telescopic rod. A fixing frame is vertically mounted at the upper end of the base, and a glass dropping pipette is vertically arranged at the upper end of the magnetic stirrer. According to the utility model, the titration hose with the U-shaped structure is used for conveying titration liquid into the glass connecting tube and the glass dropping pipette, and before use, the titration liquid is stored in the titration hose and the liquid storage tube, so that the condition of liquid leakage of the existing burette can be avoided; the supporting plate is clamped and fixed to the upper ends of the side walls of beakers with different diameters, the application range of the device is widened, and meanwhile the glass connecting pipe is clamped and fixed through the clamping groove in the upper end of the supporting plate.

Description

Technical Field

[0001] This utility model relates to the field of titration experimental technology, specifically a leak-proof titration device. Background Technology

[0002] Titration is a quantitative analytical technique and a chemical experimental procedure. It determines the content of a solute by the quantitative reaction between two solutions. The endpoint is indicated by the color change of an indicator, the volume of standard solution consumed is visually estimated, and the analytical result is calculated.

[0003] In titration experiments, most existing titration devices directly use burettes for titration operations. Whether it is the piston on an acid burette or the rubber tubing and ball on an alkaline burette, there is a risk of leakage. Therefore, leakage detection is required before operation, which is very troublesome. If leakage occurs during use, the consequences are unimaginable.

[0004] To address the aforementioned problems, an improved leak-proof titration device is now designed. Utility Model Content

[0005] The purpose of this invention is to provide a leak-proof titration device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A leak-proof titration device includes a base. A magnetic stirrer for holding a beaker and stirring the liquid inside the beaker is mounted on the upper end of the base. An electric telescopic rod is vertically mounted on the upper end of the base on one side of the magnetic stirrer. A potential detection module for detecting the potential signal of the liquid inside the beaker is mounted on the output end of the electric telescopic rod. A fixing frame is vertically mounted on the upper end of the base. The fixing frame and the electric telescopic rod are located on opposite sides of the magnetic stirrer. A glass dropper tube for dripping liquid into the beaker is vertically mounted on the upper end of the magnetic stirrer. A glass connecting tube is installed at the input end of the glass dropper tube at an upward angle. A support and fixing mechanism is provided on the glass connecting tube for supporting and fixing the glass connecting tube and the glass dropper tube to the upper end of the side wall of the beaker. A leak-proof delivery mechanism for conveying titrant to the glass connecting tube and the glass dropper tube is provided at the input end of the glass connecting tube.

[0008] As a further embodiment of this utility model: the leak-proof infusion mechanism includes a storage tube, which is vertically arranged on one side near the fixed frame. A dosing hose is installed at the lower end of the storage tube. The end of the dosing hose away from the storage tube is installed at the input end of the glass connecting tube. The dosing hose is U-shaped. The storage tube, the dosing hose, the glass connecting tube, and the glass drip tube are interconnected. A retaining ring is installed on the side wall of the storage tube to facilitate the fixed placement of the storage tube. A drive assembly for lifting and moving the storage tube is provided on the fixed frame.

[0009] As a further embodiment of this utility model: the driving assembly includes a motor; a vertical groove is formed on the side wall of the fixed frame near the liquid storage tube; an I-shaped slider is slidably connected to the inner wall of the groove; a placement cylinder for use with a retaining ring is installed at the end of the I-shaped slider away from the fixed frame; the liquid storage tube is inserted into the placement cylinder; the retaining ring is placed on the upper end of the placement cylinder; the motor is installed at the bottom of the fixed frame; a reduction gearbox is installed at the output end of the fixed frame; a screw is vertically installed at the output end of the reduction gearbox; the upper end of the screw is rotatably connected to the top of the fixed frame; a moving block is rotatably connected to the side wall of the screw via a thread; the moving block is fixedly connected to the I-shaped slider on the side wall near the groove; a rangefinder for measuring the height of the liquid storage tube is installed on the upper end of the base directly below the liquid storage tube; each height of the liquid storage tube corresponds to a usage amount of titrant.

[0010] As a further embodiment of this utility model: the supporting and fixing mechanism includes a support plate, the upper end of which is provided with a slot for locking and fixing the glass connecting tube, and a fixing plate is horizontally installed at the lower end of the support plate. Rotating columns are rotatably connected to both sides of the lower end of the fixing plate. A frame for locking and fixing the upper end of the side wall of beakers of different diameters is installed at the lower end of the rotating columns. The distance between the output end of the glass dropper and the top of the frame is 3-5 cm. A counting control component is provided on the support plate for counting the number of drops from the glass dropper and controlling the motor.

[0011] As a further embodiment of this utility model: the counting control component includes a camera, which is mounted on a support plate. The camera's shooting end faces the output end of the glass dropper. A controller for receiving and processing camera image data is installed on the upper end of the base. An operation panel for user control of the drop count is installed on the upper end of the controller.

[0012] As a further improvement of this utility model, a rubber friction pad is installed at the lower end of the base to facilitate fixing the base to the table.

[0013] As a further improvement of this utility model, magnets are installed at both the lower end of the retaining ring and the upper end of the placement cylinder to facilitate the placement of the retaining ring on the upper end of the placement cylinder.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention uses a U-shaped burette to deliver titrant to the glass connecting tube and the glass dropper. Before use, the titrant is stored inside the burette and the reservoir, which avoids leakage issues common in existing burettes.

[0016] This invention first drives the reduction gearbox to rotate, then the reduction gearbox drives the screw to rotate, and then, in conjunction with the thread on the screw, the moving block can slowly move the liquid storage tube upward, so that the titrant inside the liquid storage tube slowly moves into the glass connecting tube and the glass dropping tube, effectively improving the titration accuracy.

[0017] Meanwhile, users can directly select the number of drops to be dispensed by the glass dropper through the control panel and confirm it in real time through the camera, avoiding the need for users to constantly stare at the output end of the glass dropper, reducing the user's workload and making it easier for users to use.

[0018] This invention uses a rotatable clamping frame to snap the support plate onto the upper side wall of beakers of different diameters, thereby increasing the applicability of the device.

[0019] At the same time, the glass connecting tube is fixed by the slot at the top of the support plate. Since the distance between the output end of the glass dropper and the top of the frame is 3-5 cm, the distance between the output end of the glass dropper and the top of the beaker is also 3-5 cm, which allows for quick adjustment of the position of the output end of the glass dropper and facilitates user operation.

[0020] In this invention, the glass dropper, glass connecting tube, burette, and storage tube are detachable and movable, making it easy to clean them. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the anti-leakage infusion mechanism in this utility model.

[0023] Figure 3 This is a schematic diagram of the drive component in this utility model.

[0024] Figure 4 This is a schematic diagram of the I-shaped slider in this utility model.

[0025] The components include: 1. Base; 2. Magnetic stirrer; 3. Beaker; 4. Controller; 5. Operation panel; 6. Fixing frame; 7. Slide groove; 8. Titration tube; 9. Storage tube; 10. Placement cylinder; 11. Retaining ring; 12. Glass connecting tube; 13. Glass drip tube; 14. Potential detection module; 15. Support plate; 16. Electric telescopic rod; 17. Slot; 18. Camera; 19. Fixing plate; 20. Rotating column; 21. Slot; 22. Motor; 23. Gearbox; 24. Moving block; 25. I-shaped slider; 26. Screw. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-4 In this embodiment of the present invention, a leak-proof liquid titration device includes a base 1. A magnetic stirrer 2 is installed on the upper end of the base 1 to place a beaker 3 and stir the liquid inside the beaker 3. An electric telescopic rod 16 is vertically installed on the upper end of the base 1 on one side of the magnetic stirrer 2. A potential detection module 14 for detecting the potential signal of the liquid inside the beaker 3 is installed on the output end of the electric telescopic rod 16. A fixing frame 6 is vertically installed on the upper end of the base 1. The fixing frame 6 and the electric telescopic rod 16 are arranged in a manner that allows for the determination of the liquid potential signal inside the beaker 3. On both sides of the magnetic stirrer 2, a glass dropper tube 13 for dripping liquid into the beaker 3 is vertically arranged at the upper end of the magnetic stirrer 2. A glass connecting tube 12 is installed at the input end of the glass dropper tube 13 at an angle upward. A support and fixing mechanism is provided on the glass connecting tube 12 for supporting and fixing the glass connecting tube 12 and the glass dropper tube 13 to the upper end of the side wall of the beaker 3. A leak-proof liquid delivery mechanism for delivering titrant to the glass connecting tube 12 and the glass dropper tube 13 is provided at the input end of the glass connecting tube 12.

[0028] The leak-proof infusion mechanism includes a reservoir tube 9, which is vertically arranged on one side near the fixed frame 6. A dosing tube 8 is installed at the lower end of the reservoir tube 9. The end of the dosing tube 8 away from the reservoir tube 9 is installed at the input end of the glass connecting tube 12. The dosing tube 8 is arranged in a "U" shape. The reservoir tube 9, the dosing tube 8, the glass connecting tube 12, and the glass drip tube 13 are interconnected. A retaining ring 11 is installed on the side wall of the reservoir tube 9 to facilitate the fixed placement of the reservoir tube 9. A drive component for lifting and moving the reservoir tube 9 is provided on the fixed frame 6.

[0029] The drive assembly includes a motor 22. A vertical groove 7 is formed on the side wall of the fixed frame 6 near the liquid storage tube 9. An I-shaped slider 25 is slidably connected to the inner wall of the groove 7. A placement cylinder 10, which cooperates with a retaining ring 11, is installed at the end of the I-shaped slider 25 away from the fixed frame 6. The liquid storage tube 9 is inserted into the placement cylinder 10. The retaining ring 11 is placed on the upper end of the placement cylinder 10. The motor 22 is installed at the bottom of the fixed frame 6. A reduction gearbox 23 is installed at the output end of the fixed frame 6. A screw 26 is vertically mounted on the output end of the gearbox 23. The upper end of the screw 26 is rotatably connected to the top of the fixed frame 6. A moving block 24 is rotatably connected to the side wall of the screw 26 via a thread. The side wall of the moving block 24 near the slide groove 7 is fixedly connected to the I-shaped slider 25. A rangefinder for measuring the height of the liquid storage tube 9 is installed on the upper end of the base 1 directly below the liquid storage tube 9. Each height of the liquid storage tube 9 corresponds to a certain amount of titrant used. A corresponding table or formula can be made at the factory.

[0030] When in use, the motor 22 is started. The output end of the motor 22 drives the screw 26 to rotate through the reduction gearbox 23. Under the action of the screw, the screw 26 drives the moving block 24 to move. The moving block 24 drives the I-shaped slider 25 to move along the inner wall of the slide groove 7. The I-shaped slider 25 drives the placement cylinder 10 to move. The placement cylinder 10 drives the liquid storage tube 9 and the retaining ring 11 to move. The liquid storage tube 9 drives the input end of the titration tube 8 to move. When the liquid storage tube 9 moves upward, the titration tube 8 delivers titrant to the glass connecting tube 12 and the glass dropping tube 13. When the liquid storage tube 9 moves downward, the titration tube 8 stops delivering titrant to the glass connecting tube 12 and the glass dropping tube 13.

[0031] The supporting and fixing mechanism includes a support plate 15. The upper end of the support plate 15 has a slot 17 for clamping and fixing the glass connecting tube 12. The lower end of the support plate 15 is horizontally mounted with a fixing plate 19. Rotating columns 20 are rotatably connected to both sides of the lower end of the fixing plate 19. The lower end of the rotating column 20 is equipped with a frame 21 for clamping and fixing the upper end of the side wall of beakers 3 of different diameters. The distance between the output end of the glass dropper 13 and the top of the frame 21 is 3-5 cm. The support plate 15 is provided with a counting control component for counting the number of drops from the glass dropper 13 and controlling the motor 22.

[0032] In use, by rotating the rotating column 20, the rotating column 20 is clamped onto the upper side wall of the beaker 3, and then the glass connecting tube 12 is clamped and fixed inside the slot 17.

[0033] The counting control component includes a camera 18, which is mounted on a support plate 15. The camera 18 is positioned so that its shooting end faces the output end of the glass dropper 13. A controller 4 is mounted on the upper end of the base 1 to receive and process the image data from the camera 18. An operation panel 5 is mounted on the upper end of the controller 4 to facilitate drop count control by the user.

[0034] When in use, the user selects the desired number of drops via the control panel 5. The control panel 5 sends a signal to the controller 4, which then controls the motor 22 to start, thereby causing the glass dropper 13 to output the titrant. At the same time, the camera 18 counts and confirms the number of drops.

[0035] The working principle of a leak-proof titration device:

[0036] Before use, rotate the rotating column 20 to clamp it onto the upper side wall of the beaker 3, then clamp and fix the glass connecting tube 12 inside the slot 17, insert the liquid storage tube 9 into the placement cylinder 10, place the retaining ring 11 on the upper end of the placement cylinder 10, and make the bottom height of the liquid storage tube 9 less than the height of the input end of the glass connecting tube 12. Then add the titrant into the liquid storage tube 9 so that the liquid level is close to the input end of the glass connecting tube 12.

[0037] During use, the user selects the desired number of drops via the control panel 5. The control panel 5 sends a signal to the controller 4, which then starts the motor 22. The output of the motor 22 drives the screw 26 to rotate via the reduction gearbox 23. Under the action of the screw thread, the screw 26 drives the moving block 24 to move. The moving block 24 drives the I-shaped slider 25 to move along the inner wall of the slide groove 7. The I-shaped slider 25 drives the placement cylinder 10 to move. The placement cylinder 10 drives the liquid storage tube 9 and the retaining ring 11 to move. The liquid storage tube 9 drives the input end of the titration tube 8 to move. When the liquid storage tube 9 moves upward, the titration tube 8 delivers titrant to the glass connecting tube 12 and the glass dropper 13. When the liquid storage tube 9 moves downward, the titration tube 8 stops delivering titrant to the glass connecting tube 12 and the glass dropper 13. At the same time, the camera 18 counts and reconfirms the number of drops, causing the motor 22 to stop in time.

[0038] The amount of titrant used is determined by the height of the reservoir tube 9. Each height of the reservoir tube 9 corresponds to a certain amount of titrant used. A corresponding table or formula can be made at the factory for easy reference by the user.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention.

Claims

1. A leak-proof liquid titration device, comprising a base (1), wherein a magnetic stirrer (2) for placing a beaker (3) and stirring the liquid inside the beaker (3) is installed on the upper end of the base (1), and an electric telescopic rod (16) is vertically installed on the upper end of the base (1) on one side of the magnetic stirrer (2), and a potential detection module (14) for detecting the potential signal of the liquid inside the beaker (3) is installed at the output end of the electric telescopic rod (16), characterized in that, A fixed frame (6) is vertically installed on the upper end of the base (1). The fixed frame (6) and the electric telescopic rod (16) are set on both sides of the magnetic stirrer (2). A glass dropper (13) for dripping liquid into the beaker (3) is vertically installed on the upper end of the magnetic stirrer (2). A glass connecting tube (12) is installed at the input end of the glass dropper (13) at an angle upward. A support and fixing mechanism for supporting and fixing the glass connecting tube (12) and the glass dropper (13) to the upper end of the side wall of the beaker (3) is provided on the glass connecting tube (12). A leak-proof liquid delivery mechanism for delivering titrant to the glass connecting tube (12) and the glass dropper (13) is provided at the input end of the glass connecting tube (12).

2. The leak-proof liquid titration device according to claim 1, characterized in that, The leak-proof infusion mechanism includes a reservoir tube (9), which is vertically arranged on one side near the fixed frame (6). A dosing tube (8) is installed at the lower end of the reservoir tube (9). The end of the dosing tube (8) away from the reservoir tube (9) is installed at the input end of the glass connecting tube (12). The dosing tube (8) is arranged in a "U" shape. The reservoir tube (9), the dosing tube (8), the glass connecting tube (12), and the glass drip tube (13) are interconnected. A retaining ring (11) is installed on the side wall of the reservoir tube (9) to facilitate the fixed placement of the reservoir tube (9). A drive assembly for lifting and moving the reservoir tube (9) is provided on the fixed frame (6).

3. The leak-proof liquid titration device according to claim 2, characterized in that, The drive assembly includes a motor (22). A vertical groove (7) is provided on the side wall of the fixed frame (6) near the liquid storage tube (9). An I-shaped slider (25) is slidably connected to the inner wall of the groove (7). A placement cylinder (10) that cooperates with a retaining ring (11) is installed at the end of the I-shaped slider (25) away from the fixed frame (6). The liquid storage tube (9) is inserted into the placement cylinder (10). The retaining ring (11) is placed on the upper end of the placement cylinder (10). The motor (22) is installed at the bottom of the fixed frame (6). The fixed frame (6) outputs... A gearbox (23) is installed at the output end. A screw (26) is vertically installed at the output end of the gearbox (23). The upper end of the screw (26) is rotatably connected to the top of the fixed frame (6). A moving block (24) is rotatably connected to the side wall of the screw (26) by a thread. The side wall of the moving block (24) near the slide groove (7) is fixedly connected to the I-shaped slider (25). A rangefinder for measuring the height of the liquid storage tube (9) is installed on the upper end of the base (1) directly below the liquid storage tube (9). Each height of the liquid storage tube (9) corresponds to a usage amount of titrant.

4. The leak-proof liquid titration device according to claim 3, characterized in that, The supporting and fixing mechanism includes a support plate (15), the upper end of which is provided with a slot (17) for clamping and fixing the glass connecting tube (12), the lower end of which is horizontally mounted with a fixing plate (19), and the lower ends of the fixing plate (19) are rotatably connected with rotating columns (20) on both sides. The lower end of the rotating column (20) is equipped with a frame (21) for clamping and fixing the upper end of the side wall of beakers (3) of different diameters. The distance between the output end of the glass dropper (13) and the top of the frame (21) is 3-5 cm. The support plate (15) is provided with a counting control component for counting the number of drops from the glass dropper (13) and controlling the motor (22).

5. The leak-proof liquid titration device according to claim 4, characterized in that, The counting control component includes a camera (18), which is mounted on a support plate (15). The camera (18) is positioned so that its shooting end faces the output end of the glass dropper (13). A controller (4) for receiving and processing image data from the camera (18) is mounted on the upper end of the base (1). An operation panel (5) for easy drop count control by the user is mounted on the upper end of the controller (4).

6. The leak-proof liquid titration device according to claim 1, characterized in that, The lower end of the base (1) is equipped with a rubber friction pad to facilitate fixing the base (1) to the table.

7. The leak-proof liquid titration device according to claim 3, characterized in that, The lower end of the retaining ring (11) and the upper end of the placement tube (10) are both equipped with magnets to facilitate the placement of the retaining ring (11) on the upper end of the placement tube (10).

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