An intelligent dropping funnel for precisely controlling the speed of reactant addition

Abstract

The utility model relates to chemical experiment instrument technical field, and disclose a kind of for the intelligent dropping funnel of accurately controlling reactant adding speed, including funnel, manual valve and short pipe, the bottom of funnel is equipped with manual valve, the lower surface of manual valve is equipped with short pipe.The utility model structure is reasonable, by setting drop speed control module, by the length of free extension outlet pipe and the opening degree of control baffle inside outlet pipe to control the time of reactant drop, this module structure is simple, convenient to operate, low in cost, which reduces the economic cost of experiment to some extent, by setting drop volume control module, so that the device can be selected according to the actual experimental requirement to meet the aperture model of experimental requirement, after rotating to specified position, by magnetic attraction fixed, the mode of replacement installation is simple and fast, which can reduce the wasted time of replacement and installation to some extent, also reduce the wasted time of experiment to some extent.

Description

Technical Field

[0001] This utility model relates to the field of chemical experimental instrument technology, specifically to an intelligent dropping funnel for precisely controlling the rate at which reactants are added. Background Technology

[0002] In chemical experiments, especially in organic synthesis reactions, many reactions are strongly exothermic, highly reactive, or extremely sensitive to reactant concentrations. To control reaction rates, prevent side reactions, improve product yields, and ensure experimental safety, it is essential to precisely control the rate at which a certain reactant (droplet) is added.

[0003] A dropping funnel disclosed in Chinese Utility Model Patent Application Publication No. CN204689624U, although replacing the piston switch with a liquid flow control switch, making it more convenient to adjust the dropping speed, neglects the adjustment of the flow control switch. Its adjustment mechanism is inherently complex, resulting in high unit procurement costs, which increases the economic cost of experiments. Furthermore, the device ignores the need to control the volume of reactants dripping in a single cycle. While some existing devices can control the drip volume, most only offer one aperture size. Changing to a different aperture size requires disassembling the current device and reinstalling it, undoubtedly wasting considerable experimental time. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an intelligent dropping funnel for precisely controlling the rate of reactant addition. This solves the problems of high procurement costs for the adjustment devices in existing devices, which can easily increase the economic cost of experiments, and the waste of experimental time caused by disassembling and installing existing devices to replace them with different aperture models.

[0005] (II) Technical Solution To achieve the above objectives, this utility model is implemented through the following technical solution: an intelligent dripping funnel for precisely controlling the addition rate of reactants, comprising a funnel, a manual valve at the bottom of the funnel, a short tube on the lower surface of the manual valve, a dripping speed control module threadedly connected to the surface of the short tube, and a dripping volume control module at the bottom of the dripping speed control module.

[0006] Optionally, the dripping speed control module includes a threaded sleeve, the bottom of which is fixedly connected to a first cavity outlet pipe, and the bottom of the first cavity outlet pipe is threadedly connected to a second cavity outlet pipe.

[0007] Optionally, a third cavity outlet pipe is threadedly connected to the bottom of the second cavity outlet pipe, and a first cylindrical iron block is fixedly connected to the bottom of the third cavity outlet pipe. Baffles are provided on the inner walls of the first cavity outlet pipe, the second cavity outlet pipe, and the third cavity outlet pipe.

[0008] Optionally, the surfaces of the first cavity outlet pipe, the second cavity outlet pipe, and the third cavity outlet pipe are fixedly connected with threaded air inlets, the surfaces of the threaded air inlets are threadedly connected with air supply pipes, one end of the air supply pipe is threadedly connected with a vent valve, and one end of the vent valve is provided with an air bag.

[0009] Optionally, the drip volume control module includes a first connecting plate, a first rotating shaft hole is provided at the top of the first connecting plate, a first rotating shaft is provided inside the first rotating shaft hole, a first short rod is provided inside the first rotating shaft, a disk is fixedly connected to the bottom of the first short rod, and a second short rod is fixedly connected to the bottom of the disk.

[0010] Optionally, a first short connecting plate and a second short connecting plate are fixedly connected to the surface of the disk from left to right, and a third short connecting plate and a fourth short connecting plate are fixedly connected to the surface of the disk from front to back. A first concave disk is fixedly connected to one side of the first short connecting plate, and a first circular hole is provided at the bottom of the first concave disk. A second concave disk is fixedly connected to one side of the second short connecting plate, and a second circular hole is provided at the bottom of the second concave disk. A third concave disk is fixedly connected to the front of the third short connecting plate.

[0011] Optionally, the bottom of the third concave disk is provided with a third circular hole, the back of the fourth short connecting plate is fixedly connected to the fourth concave disk, the bottom of the fourth concave disk is provided with a fourth circular hole, the top of the first concave disk, the second concave disk, the third concave disk and the fourth concave disk are all provided with a top annular magnet, and the bottom of the first concave disk, the second concave disk, the third concave disk and the fourth concave disk are all provided with a bottom annular magnet.

[0012] Optionally, the disc is provided with a second connecting plate via a second short rod. The top of the second connecting plate is provided with a second rotating shaft hole. The second rotating shaft is provided inside the second rotating shaft hole. The second rotating shaft and the second short rod are adapted to each other. A vertical liquid outlet pipe is fixedly connected to one side of the second connecting plate. A second cylindrical iron block is fixedly connected to the top of the vertical liquid outlet pipe.

[0013] In summary, the technical effects and advantages of this utility model are as follows: 1. This utility model has a reasonable structure. By setting a drip rate control module, the dripping time of the reactants can be controlled by freely extending the length of the liquid outlet tube and controlling the opening degree of the baffle inside the liquid outlet tube. This module has a simple structure, is easy to operate, and has a low cost, which reduces the economic cost of experiments to a certain extent.

[0014] 2. In this utility model, by setting a drip volume control module, the device can select the aperture model that meets the experimental requirements according to the actual experimental needs. After rotating to the designated position, it can be fixed by magnetic attraction. The replacement and installation method is simple and quick, which can reduce the time wasted in replacement and installation to a certain extent, and also reduce the time wasted in the experiment to a certain extent. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the dripping speed control module of this utility model. Figure 3 This is a schematic diagram of the cavity outlet pipe assembly of the dripping speed control module of this utility model. Figure 4 This is a schematic diagram of the baffle assembly of the drip rate control module of this utility model. Figure 5 This is a schematic diagram of the drip volume control module of this utility model. Figure 6 This is a schematic diagram of the drip volume control module of this utility model. Figure 7 for Figure 6 Enlarged schematic diagram of a local part of the structure.

[0016] In the diagram: 1. Funnel; 2. Manual valve; 3. Short pipe; 4. Drip rate control module; 401. Threaded sleeve; 402. First cavity outlet pipe; 403. Second cavity outlet pipe; 404. Third cavity outlet pipe; 405. First cylindrical iron block; 406. Baffle plate; 407. Threaded air inlet; 408. Air supply pipe; 409. Vent valve; 410. Airbag; 5. Drip volume control module; 501. First connecting plate; 502. First rotating shaft; 503. First short rod; 504. Disc; 505. Second short rod; 506. First short connecting plate; 507. Second short connecting plate; 508. Third short connecting plate; 509. Fourth short connecting plate; 510. First concave disc; 511. Second concave disc; 512. Third concave disc; 513. Fourth concave disc; 514. Top annular magnet; 515. Bottom annular magnet; 516. Second connecting plate; 517. Second pivot; 518. Second pivot; 519. Second cylindrical iron block. Detailed Implementation

[0017] 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.

[0018] Example: Reference Figure 1 The intelligent dropping funnel shown is used to precisely control the rate at which reactants are added. It includes a funnel 1, a manual valve 2 at the bottom of the funnel 1, a short tube 3 on the lower surface of the manual valve 2, a dripping speed control module 4 threadedly connected to the surface of the short tube 3, and a dripping volume control module 5 at the bottom of the dripping speed control module 4.

[0019] Manual valve 2 and funnel 1 are connected as one unit, short pipe 3 and manual valve 2 are connected as one unit, dripping speed control module 4 is screwed onto short pipe 3, and dripping volume control module 5 is welded onto dripping speed control module 4.

[0020] In use, the experimenter rotates the manual valve 2, causing the reactants in the funnel 1 to leak out. The reactants pass through the manual valve 2 into the short tube 3, and then through the short tube 3 into the drip rate control module 4. The experimenter controls the flow rate of the reactant liquid through the drip rate control module 4. The slowed-down reactant liquid is then processed by the drip volume control module 5 into a dripping liquid with a volume that meets the experimental requirements, and then dripped into the chemical reagent drop by drop.

[0021] As a preferred embodiment of this example, Figures 2 to 4 As shown, the dripping speed control module 4 includes a threaded sleeve 401, the bottom of which is fixedly connected to a first cavity outlet pipe 402, and the bottom of the first cavity outlet pipe 402 is threadedly connected to a second cavity outlet pipe 403.

[0022] The bottom of the second cavity outlet pipe 403 is threadedly connected to the third cavity outlet pipe 404. The bottom of the third cavity outlet pipe 404 is fixedly connected to the first cylindrical iron block 405. The inner walls of the first cavity outlet pipe 402, the second cavity outlet pipe 403 and the third cavity outlet pipe 404 are provided with baffles 406.

[0023] The surfaces of the first cavity outlet pipe 402, the second cavity outlet pipe 403, and the third cavity outlet pipe 404 are fixedly connected with threaded air inlet end 407. The surface of the threaded air inlet end 407 is threadedly connected with an air supply pipe 408. One end of the air supply pipe 408 is threadedly connected with a vent valve 409. One end of the vent valve 409 is provided with an air bag 410.

[0024] The threaded sleeve 401 is welded to the top of the first cavity outlet pipe 402. The second cavity outlet pipe 403 is screwed to the bottom of the first cavity outlet pipe 402. The third cavity outlet pipe 404 is screwed to the bottom of the second cavity outlet pipe 403. The first cylindrical iron block 405 is welded to the bottom of the third cavity outlet pipe 404. The assembled first cavity outlet pipe 402 is screwed onto the short pipe 3 through the threaded sleeve 401. The threaded air inlet end 407 is welded to the first cavity outlet pipe 402 and the second cavity outlet pipe 403. On the surfaces of the liquid outlet pipe 403 and the third cavity liquid outlet pipe 404, the gas supply pipe 408 is installed between the threaded air inlet end 407 and the vent valve 409. The vent valve 409 is integrally connected with the air bag 410. When inflating the air bag 410, the vent valve 409 needs to be closed, otherwise the gas will easily leak out. When it is necessary to release the gas, the vent valve 409 needs to be opened, and the gas in the first cavity liquid outlet pipe 402, the second cavity liquid outlet pipe 403 and the third cavity liquid outlet pipe 404 will be released.

[0025] During use, before the liquid enters the dripping speed control module 4, the experimenter needs to set the degree of obstruction of the baffle 406 according to the actual liquid dripping speed. At this time, the airbags 410 connected to the first cavity outlet pipe 402, the second cavity outlet pipe 403, and the third cavity outlet pipe 404 need to be squeezed sequentially, thereby supplying air through the air supply pipe 408 into the first cavity outlet pipe 402, the second cavity outlet pipe 403, and the third cavity outlet pipe 404 respectively. After passing through the cavities of the first cavity outlet pipe 402, the second cavity outlet pipe 403, and the third cavity outlet pipe 404, the air enters the baffle 406. After the baffle 406 is filled with gas, it will gradually rise from a vertical state to a horizontal state. It should be noted that... The horizontal baffle 406 is formed when the gas is fully filled. When the liquid passes through the baffle 406 in this state, the direction of liquid fall is fully blocked, and the flow velocity is extremely low. When the baffle 406 is not fully filled, the baffle 406 will be in an inclined state, which will also block the liquid and affect the liquid fall time. Based on the above principle, the experimenter can limit the liquid fall time and thus control the flow velocity. After the first cavity outlet pipe 402, the second cavity outlet pipe 403, and the third cavity outlet pipe 404 are assembled, the length of the outlet pipe will be very long, which will also prolong the liquid fall time to a certain extent, thus limiting the liquid flow velocity to a certain extent.

[0026] By setting up a drip rate control module 4, the dripping time of the reactants can be controlled by freely extending the length of the outlet pipe and controlling the opening degree of the baffle 406 inside the outlet pipe. This module has a simple structure, is easy to operate, and is inexpensive, which reduces the economic cost of the experiment to a certain extent.

[0027] like Figures 5 to 7As shown, in this embodiment, the drip volume control module 5 includes a first connecting plate 501. The top of the first connecting plate 501 is provided with a first rotating shaft hole. The first rotating shaft hole is provided with a first rotating shaft 502. The first rotating shaft 502 is provided with a first short rod 503. The bottom of the first short rod 503 is fixedly connected to a disc 504. The bottom of the disc 504 is fixedly connected to a second short rod 505.

[0028] The surface of the disc 504 is fixedly connected from left to right with a first short connecting plate 506 and a second short connecting plate 507. The surface of the disc 504 is fixedly connected from front to back with a third short connecting plate 508 and a fourth short connecting plate 509. A first concave disc 510 is fixedly connected to one side of the first short connecting plate 506. A first circular hole is provided at the bottom of the first concave disc 510. A second concave disc 511 is fixedly connected to one side of the second short connecting plate 507. A second circular hole is provided at the bottom of the second concave disc 511. A third concave disc 512 is fixedly connected to the front of the third short connecting plate 508.

[0029] The bottom of the third concave disc 512 is provided with a third circular hole. The back of the fourth short connecting plate 509 is fixedly connected to the fourth concave disc 513. The bottom of the fourth concave disc 513 is provided with a fourth circular hole. The top of the first concave disc 510, the second concave disc 511, the third concave disc 512 and the fourth concave disc 513 are all provided with a top annular magnet 514. The bottom of the first concave disc 510, the second concave disc 511, the third concave disc 512 and the fourth concave disc 513 are all provided with a bottom annular magnet 515.

[0030] The disc 504 is provided with a second connecting plate 516 via a second short rod 505. A second rotating shaft hole is provided at the top of the second connecting plate 516. A second rotating shaft 517 is provided inside the second rotating shaft hole. The second rotating shaft 517 and the second short rod 505 are adapted to each other. A vertical liquid outlet pipe 518 is fixedly connected to one side of the second connecting plate 516. A second cylindrical iron block 519 is fixedly connected to the top of the vertical liquid outlet pipe 518.

[0031] The first connecting plate 501 is welded to the surface of the third cavity outlet pipe 404 of the dripping speed control module 4. The second connecting plate 516 is welded to the surface of the vertical outlet pipe 518. The first rotating shaft hole and the first connecting plate 501 are integrally formed, and the second rotating shaft hole and the second connecting plate 516 are integrally formed. The first rotating shaft 502 is placed into the first rotating shaft hole, and the second rotating shaft 517 is placed into the second rotating shaft hole. The first short rod 503, the disc 504 and the second short rod 505 are welded together. The first short rod 503 is inserted into the first rotating shaft 502, and the second short rod 505 is inserted into the second rotating shaft 517. The first short connecting plate 506, the second short connecting plate 507, the third short connecting plate 508 and the fourth short connecting plate 509 are all welded to the surface of the disc 504. The first concave disc 510 is welded to the first short connecting plate 506, the second concave disc 511 is welded to the second short connecting plate 507, the third concave disc 512 is welded to the third short connecting plate 508, and the fourth concave disc 513 is welded to the fourth short connecting plate 509. The top annular magnet 514 and the bottom annular magnet 515 are fixed to the top and bottom of the first concave disc 510, the second concave disc 511, the third concave disc 512, and the fourth concave disc 513 by adhesive. The first circular hole and the first concave disc 510 are integrally formed, the second circular hole and the second concave disc 511 are integrally formed, the third circular hole and the third concave disc 512 are integrally formed, and the fourth circular hole and the fourth concave disc 513 are integrally formed. It should be noted that although the first connecting plate 501 and the second connecting plate 516 are respectively provided with a first pivot hole and a second pivot hole, the pivots will not fall off when the first pivot 502 and the second pivot 517 are inserted into the pivot holes. This is because there is a supporting plate at the bottom of the pivot, and the plate is also provided with a circular hole. This circular hole is adapted to the first short rod 503 and the second short rod 505. Since this is a well-known and commonly used design, it is only described in text form in this embodiment and is not shown in the figure.

[0032] During use, the experimenter may need to control the volume of reactant dripping to better suit the experiment. Before the reactant drips, the experimenter needs to manually rotate disk 504 according to actual needs, causing the first short connecting plate 506, the second short connecting plate 507, the third short connecting plate 508, and the fourth short connecting plate 509 to rotate as well. This, in turn, causes the first concave disk 510, the second concave disk 511, the third concave disk 512, and the fourth concave disk 513 to also begin rotating. The diameters of the first, second, third, and fourth circular holes are different, and the experimenter selects the concave disk according to the hole size. When any of the first, second, third, and fourth concave disks 510, 511, 512, and 513 are used... When a liquid is selected, it is rotated between the first cylindrical iron block 405 under the third cavity outlet pipe 404 of the dripping speed control module 4 and the second cylindrical iron block 519 of the vertical outlet pipe 518 of the dripping volume control module 5. Then, it is attracted and fixed by the top annular magnet 514 and the bottom annular magnet 515 at the top and bottom of the concave disc, thereby fixing the selected concave disc between the first cylindrical iron block 405 and the second cylindrical iron block 519. The liquid falls onto the concave disc, some of the liquid remains on the concave disc, and some of the liquid drips through the circular hole of the concave disc. The diameter of the dripping liquid is adapted to the circular hole, and the selection of the circular hole is consistent with the experimental requirements. Therefore, the liquid dripping from the circular hole is consistent with the experimental requirements.

[0033] By setting the drip volume control module 5, the device can select the aperture model that meets the experimental requirements according to the actual experimental needs. After rotating to the designated position, it can be fixed by magnetic attraction. The replacement and installation method is simple and quick, which can reduce the time wasted in replacement and installation to a certain extent, and also reduce the time wasted in the experiment.

[0034] The working principle of this practical application is as follows: The experimenter rotates the manual valve 2, causing the reactants in funnel 1 to leak out. The reactants pass through the manual valve 2 into the short tube 3, and then through the short tube 3 into the drip rate control module 4. The experimenter controls the flow rate of the reactant liquid through the drip rate control module 4. The slowed-down reactant liquid is then processed into a drip volume control module 5 to achieve the required volume for the experiment, and then dripped into the chemical reagent. Before the liquid enters the drip rate control module 4, the experimenter needs to adjust the flow-blocking degree of the baffle 406 according to the actual liquid drip rate. At this time, the airbag 410 connected to the first cavity outlet pipe 402, the second cavity outlet pipe 403, and the third cavity outlet pipe 404 needs to be squeezed in sequence to... Air is supplied through the gas supply pipe 408 into the first cavity outlet pipe 402, the second cavity outlet pipe 403, and the third cavity outlet pipe 404 respectively. After passing through the cavities of the first cavity outlet pipe 402, the second cavity outlet pipe 403, and the third cavity outlet pipe 404, the air enters the baffle plate 406. After the baffle plate 406 is filled with gas, it gradually rises from a vertical state to a horizontal state. It should be noted that the horizontal state of the baffle plate 406 is formed when the gas is fully filled. When the liquid passes through the baffle plate 406 in this state, the direction of liquid descent is fully blocked, and the flow velocity is extremely low. When the baffle plate 406 is not fully filled, the baffle plate 406 will be in a tilted state, which will also block the liquid and thus affect the liquid descent time. Based on the above principle, experimenters can limit the liquid's descent time to control the flow rate. However, after the first cavity outlet pipe 402, the second cavity outlet pipe 403, and the third cavity outlet pipe 404 are assembled, their lengths are quite long, which also extends the liquid's descent time to some extent, thus limiting the liquid's flow rate. Experimenters may need to control the volume of reactant dripping to better suit the experiment. Before the reactant drips, experimenters need to manually rotate the disc 504 according to actual needs, causing the first short connecting plate 506, the second short connecting plate 507, the third short connecting plate 508, and the fourth short connecting plate 509 to rotate accordingly, thereby causing the first concave disc 510, the second... The second concave disk 511, the third concave disk 512, and the fourth concave disk 513 also begin to rotate. The diameters of the first, second, third, and fourth circular holes are different. The experimenters select the concave disks based on the hole size. When any one of the first, second, third, or fourth concave disks 510, 511, 512, or 513 is selected, it will be rotated between the first cylindrical iron block 405 under the third cavity outlet pipe 404 of the dripping speed control module 4 and the second cylindrical iron block 519 of the vertical outlet pipe 518 of the dripping volume control module 5. Then, it is fixed by being attracted by the top annular magnet 514 and the bottom annular magnet 515 at the top and bottom of the concave disk.The selected concave disk is thus fixed between the first cylindrical iron block 405 and the second cylindrical iron block 519. Liquid falls onto the concave disk; some liquid remains on the disk, while some drips through the circular hole in the disk. The diameter of the dripping liquid matches the diameter of the circular hole, and the choice of the circular hole is consistent with the experimental requirements. Therefore, the amount of liquid dripping from the circular hole is consistent with the experimental requirements.

[0035] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A smart dropping funnel for precisely controlling the rate of reactant addition, comprising a funnel (1), characterized in that: The funnel (1) is provided with a manual valve (2) at the bottom, and a short tube (3) is provided on the lower surface of the manual valve (2). A dripping speed control module (4) is threadedly connected to the surface of the short tube (3), and a dripping volume control module (5) is provided at the bottom of the dripping speed control module (4).

2. The intelligent dropping funnel for precisely controlling the addition rate of reactants according to claim 1, characterized in that: The dripping speed control module (4) includes a threaded sleeve (401), the bottom of which is fixedly connected to a first cavity outlet pipe (402), and the bottom of the first cavity outlet pipe (402) is threadedly connected to a second cavity outlet pipe (403).

3. The intelligent dropping funnel for precisely controlling the rate of reactant addition according to claim 2, characterized in that: The bottom of the second cavity outlet pipe (403) is threadedly connected to the third cavity outlet pipe (404), and the bottom of the third cavity outlet pipe (404) is fixedly connected to the first cylindrical iron block (405). The inner walls of the first cavity outlet pipe (402), the second cavity outlet pipe (403) and the third cavity outlet pipe (404) are provided with baffles (406).

4. The intelligent dropping funnel for precisely controlling the addition rate of reactants according to claim 3, characterized in that: The surfaces of the first cavity outlet pipe (402), the second cavity outlet pipe (403) and the third cavity outlet pipe (404) are fixedly connected with threaded air inlet ends (407), the surfaces of the threaded air inlet ends (407) are threadedly connected with air supply pipes (408), one end of the air supply pipes (408) is threadedly connected with a vent valve (409), and one end of the vent valve (409) is provided with an air bag (410).

5. The intelligent dropping funnel for precisely controlling the rate of reactant addition according to claim 1, characterized in that: The drip volume control module (5) includes a first connecting plate (501), the top of the first connecting plate (501) is provided with a first rotating shaft hole, the inside of the first rotating shaft hole is provided with a first rotating shaft (502), the inside of the first rotating shaft (502) is provided with a first short rod (503), the bottom of the first short rod (503) is fixedly connected with a disc (504), and the bottom of the disc (504) is fixedly connected with a second short rod (505).

6. The intelligent dropping funnel for precisely controlling the addition rate of reactants according to claim 5, characterized in that: The surface of the disc (504) is fixedly connected with a first short connecting plate (506) and a second short connecting plate (507) from left to right. The surface of the disc (504) is fixedly connected with a third short connecting plate (508) and a fourth short connecting plate (509) from front to back. A first concave disc (510) is fixedly connected to one side of the first short connecting plate (506). A first circular hole is provided at the bottom of the first concave disc (510). A second concave disc (511) is fixedly connected to one side of the second short connecting plate (507). A second circular hole is provided at the bottom of the second concave disc (511). A third concave disc (512) is fixedly connected to the front of the third short connecting plate (508).

7. The intelligent dropping funnel for precisely controlling the rate of reactant addition according to claim 6, characterized in that: The bottom of the third concave disk (512) is provided with a third circular hole, and the back of the fourth short connecting plate (509) is fixedly connected to the fourth concave disk (513). The bottom of the fourth concave disk (513) is provided with a fourth circular hole. The top of the first concave disk (510), the second concave disk (511), the third concave disk (512) and the fourth concave disk (513) are all provided with a top annular magnet (514), and the bottom of the first concave disk (510), the second concave disk (511), the third concave disk (512) and the fourth concave disk (513) are all provided with a bottom annular magnet (515).

8. The intelligent dropping funnel for precisely controlling the addition rate of reactants according to claim 7, characterized in that: The disc (504) is provided with a second connecting plate (516) via a second short rod (505). The top of the second connecting plate (516) is provided with a second rotating shaft hole. The interior of the second rotating shaft hole is provided with a second rotating shaft (517). The second rotating shaft (517) and the second short rod (505) are adapted to each other. A vertical liquid outlet pipe (518) is fixedly connected to one side of the second connecting plate (516). A second cylindrical iron block (519) is fixedly connected to the top of the vertical liquid outlet pipe (518).

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