Magnetic stirrer suitable for suspension
By designing a magnetic stirrer, the problems of human error and spillage in the mixing process of suspensions are solved, achieving a high-precision mixing effect and ensuring the accuracy of experimental results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHIA TAI TIANQING PHARMA GRP CO LTD
- Filing Date
- 2025-07-01
- Publication Date
- 2026-05-26
AI Technical Summary
Existing techniques suffer from problems such as large human error, easy spillage of solution, and inaccurate results due to sedimentation during suspension mixing, which affect experimental results.
A magnetic stirrer is used, and a Schott flask is used instead of a traditional beaker. The magnetic stirring technology driven by a servo motor achieves speed control and stirring uniformity, and a sealed cap prevents spillage.
It effectively prevents solution spillage, reduces human error, ensures suspension uniformity and experimental accuracy, and improves data reliability.
Smart Images
Figure CN224270935U_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of suspension detection technology, specifically a magnetic stirrer suitable for suspensions. Background Technology
[0002] Suspension is a heterogeneous liquid formulation, belonging to a coarse dispersion system. It is formed by insoluble solid drug particles dispersed in a liquid dispersion medium. The characteristics of suspension are that the solution is not uniform, the main components are prone to aggregation, and it is necessary to use instruments to mix them.
[0003] However, the following problems were found in the implementation of the relevant technologies:
[0004] Currently, a vortex mixer is used. The mixing method involves transferring the solution to a beaker, vortexing for more than one minute, and then weighing after stopping the vortex. However, although the rotation speed can be fixed, it is affected by the force applied by different people. If the force is too strong, the solution is easy to spill or generate a lot of bubbles, causing the main components to accumulate. If the force is too weak, the mixing is uneven, which ultimately leads to inaccurate data and affects the accuracy.
[0005] Furthermore, weighing the solution after stopping the vortex will result in some precipitation, leading to uneven solution and affecting the test results. Utility Model Content
[0006] To address the problems mentioned in the background section, this invention provides a magnetic stirrer suitable for suspensions, offering advantages such as spill prevention and high-precision mixing. This invention uses a Schott flask instead of a traditional beaker, solving the problem of spillage during suspension mixing leading to result deviations. By introducing magnetic stirring technology and configuring precise speed control, it solves the problems of large errors in manual operation and uneven sedimentation of suspensions.
[0007] To achieve the above objectives, the present invention provides the following technical solution: a control plate is provided on one side of the upper surface of the machine body, a carrier plate is provided on the other side of the upper surface of the machine body, a Schott flask is placed on the upper surface of the carrier plate, a stir bar is provided inside the Schott flask, a cavity is provided inside the machine body, a strong magnet block is provided in the cavity to cooperate with the stir bar to drive the stir bar to agitate, and a power transmission mechanism for driving the strong magnet block to rotate, the power transmission mechanism being connected to the control plate.
[0008] Preferably, two Schott flasks are placed on the upper surface of the carrier plate, and correspondingly, two stir bar and two strong magnet blocks are placed on each surface.
[0009] Preferably, the power transmission mechanism includes a servo motor, a first gear is fixedly connected to the output shaft of the servo motor, two second gears are meshed on the first gear and are arranged opposite to the Schott flask, a disk is fixedly provided on the upper surface of the second gear, and two strong magnet blocks are respectively arranged on the two disks.
[0010] Preferably, a lower support column is fixedly provided on the lower surface of the second gear, and the lower end of the lower support column is rotatably connected to the lower inner wall of the cavity.
[0011] Preferably, an upper support column is fixedly provided on the upper surface of the first gear, and the upper end of the upper support column is rotatably connected to the upper inner wall of the cavity.
[0012] Preferably, a protective shell is fixedly provided on the lower inner wall of the cavity, and the servo motor is fixedly installed inside the protective shell.
[0013] Preferably, the Schott bottle has a cap on its upper side, and a sealing ring is fixedly installed inside the cap.
[0014] Preferably, the upper surface of the carrier plate is provided with a placement tray, and the Schott bottle is placed on the placement tray.
[0015] Preferably, a control circuit board is provided at the bottom of the control board, and a control circuit is integrated on the control circuit board. The control circuit includes a controller and a power supply circuit for supplying power to the servo motor and each power module in the control circuit. The input terminal of the controller is connected to an operation button, and the output terminal of the controller is connected to a motor driver. The servo motor is connected to the output terminal of the motor driver.
[0016] Preferably, the controller is a PLC controller or a microcontroller; a switch is connected in series in the power supply circuit, and both the switch and the operation button are exposed on the control board.
[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0018] 1. This utility model innovatively uses Schott flasks instead of traditional beakers as the suspension carrier. Schott flasks have a smaller mouth structure, which can effectively suppress the occurrence of solution overflow during the mixing operation of the suspension, avoid sample loss and concentration changes caused by liquid spillage, and thus avoid interference with the accuracy of experimental or production results, providing a strong guarantee for data reliability.
[0019] 2. This utility model introduces a magnetic stirring technology system, specifically by configuring a dry and clean magnetic rotor inside the Schott flask and placing the Schott flask stably on a carrier plate. Relying on the gear rotation structure inside the equipment, a constant output of stirring speed is achieved, which significantly reduces the fluctuation of stirring effect caused by differences in operator technique and force, and effectively controls human error variables. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0021] Figure 2 This is an exploded cross-sectional view of the Schott bottle of this utility model;
[0022] Figure 3 This is an exploded cross-sectional view of the body structure of this utility model;
[0023] Figure 4 This is an exploded view of the gear structure of this utility model;
[0024] Figure 5 This is a block diagram showing the connection between the controller of this utility model and other units.
[0025] In the diagram: 1. Main body; 11. Control board; 11-1. Controller; 11-2. Power circuit; 11-3. Operation button; 11-4. Motor driver; 11-5. Switch; 12. Carrier plate; 121. Placement tray; 13. Cavity; 2. Schott flask; 21. Stirrer; 22. Bottle cap; 23. Sealing ring; 3. First gear; 31. Servo motor; 32. Second gear; 33. Disc; 34. Strong magnet; 35. Lower support column; 36. Upper support column; 37. Protective shell. 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] like Figures 1 to 5 As shown, this utility model provides a magnetic stirrer suitable for suspensions, including a body 1. A control plate 11 is provided on one side of the upper surface of the body 1, and a carrier plate 12 is provided on the other side of the upper surface of the body 1. A Schott flask 2 is placed on the upper surface of the carrier plate 12. A stir bar 21 is provided inside the Schott flask 2. A cavity 13 is opened inside the body 1. A strong magnet block 34 is provided in the cavity 13 to cooperate with the stir bar 21 to drive the stir bar 21 to stir, and a power transmission mechanism for driving the strong magnet block 34 to rotate. The power transmission mechanism is connected to the control plate 11.
[0028] Specifically, two Schott bottles 2 are placed on the upper surface of the carrier plate 12, and correspondingly, two stir bar 21 and two strong magnet blocks 34 are placed on the upper surface of the carrier plate 12.
[0029] Specifically, the power transmission mechanism includes a servo motor 31, a first gear 3 is fixedly connected to the output shaft of the servo motor 31, two second gears 32 meshing on the first gear 3 and arranged opposite to the Schott bottle 2, a disk 33 is fixedly provided on the upper surface of the second gear 32, and two strong magnet blocks 34 are respectively arranged on the two disks 33.
[0030] Specifically, after the magnetic stirrer is powered on, the servo motor 31 starts working. The output shaft of the servo motor 31 drives the first gear 3 to rotate. The rotating first gear 3 meshes with two second gears 32, thereby transmitting power to the second gears 32, causing the two second gears 32 to start rotating under the drive of the first gear 3. When the second gears 32 rotate, they drive the disc 33 fixed above them to rotate synchronously. The strong magnet blocks 34 symmetrically fixed on the disc 33 rotate accordingly, generating a rotating magnetic field. This rotating magnetic field can penetrate the body 1 and the carrier plate 12 and act on the stir bar 21 placed in the Schott flask 2 on the carrier plate 12. Since the stir bar 21 itself is magnetic, under the attraction and drive of the rotating magnetic field generated by the strong magnet block 34, it begins to make a circular motion in the Schott flask 2. The circular motion of the stir bar 21 causes the suspension in the Schott flask 2 to form a vortex, realizing the uniform mixing of the suspension.
[0031] Furthermore, a lower support column 35 is fixedly provided on the lower surface of the second gear 32, and the lower end of the lower support column 35 is rotatably connected to the lower inner wall of the cavity 13. The lower support column 35 fixed on the lower surface of the second gear 32 is rotatably connected to the lower inner wall of the cavity 13, providing rotational support for the second gear 32.
[0032] Furthermore, an upper support column 36 is fixedly provided on the upper surface of the first gear 3, and the upper end of the upper support column 36 is rotatably connected to the upper inner wall of the cavity 13. The upper support column 36 fixed on the upper surface of the first gear 3 is rotatably connected to the upper inner wall of the cavity 13 to ensure the stable rotation of the first gear 3.
[0033] Furthermore, a protective shell 37 is fixedly provided on the lower inner wall of the cavity 13, and the servo motor 31 is fixedly installed inside the protective shell 37 to provide protection and support for the servo motor 31.
[0034] Furthermore, the Schott flask 2 has a cap 22 on its upper side, and a sealing ring 23 is fixed inside the cap 22. During the stirring process, because the Schott flask 2 has a small opening and is equipped with a cap 22 and a sealing ring 23, the suspension can be effectively prevented from spilling out.
[0035] Furthermore, the upper surface of the carrier plate 12 is provided with a placement tray 121, on which the Schott bottle 2 is placed; the placement tray 121 provided on the upper surface of the carrier plate 12 can stably place the Schott bottle 2, preventing the bottle from shaking or tipping over during the stirring process, and further ensuring the safety and stability of the stirring process.
[0036] Furthermore, a control circuit board is provided at the bottom of the control board 11. The control circuit board integrates a control circuit, which includes a controller 11-1 and a power supply circuit 11-2 that supplies power to the servo motor 31 and each power module in the control circuit. The input terminal of the controller 11-1 is connected to an operation button 11-3, and the output terminal of the controller 11-1 is connected to a motor driver 11-4. The servo motor 31 is connected to the output terminal of the motor driver 11-4.
[0037] The controller 11-1 is a PLC controller or a microcontroller; a switch 11-5 is connected in series in the power supply circuit, and both the switch 11-5 and the operation button 11-3 are exposed on the control board 11.
[0038] Working principle: After the magnetic stirrer is powered on, the servo motor 31 located inside the protective shell 37 starts to work, and the output end of the servo motor 31 drives the fixed first gear 3 to rotate.
[0039] The outer surface of the rotating first gear 3 meshes with the two second gears 32, thereby transmitting power to the second gears 32, causing the two second gears 32 to start rotating under the drive of the first gear 3. The lower support column 35 fixed on the lower surface of the second gear 32 is rotatably connected to the lower inner wall of the cavity 13, providing rotational support for the second gear 32. The upper support column 36 fixed on the upper surface of the first gear 3 is rotatably connected to the upper inner wall of the cavity 13, ensuring the stable rotation of the first gear 3.
[0040] When the second gear 32 rotates, it drives the disk 33 fixed above it to rotate synchronously. The strong magnet blocks 34 symmetrically fixed on the disk 33 rotate accordingly, generating a rotating magnetic field. This rotating magnetic field can penetrate the body 1 and the carrier plate 12 and act on the stir bar 21 placed in the Schott flask 2 on the carrier plate 12. Since the stir bar 21 itself is magnetic, it begins to make circular motion inside the Schott flask 2 under the attraction and drive of the rotating magnetic field generated by the strong magnet block 34.
[0041] The circular motion of the stir bar 21 causes the suspension in the Schott flask 2 to form a vortex, achieving uniform mixing of the suspension. During the stirring process, because the Schott flask 2 has a small opening and is equipped with a cap 22 and a sealing ring 23, it can effectively prevent the suspension from spilling out.
[0042] In addition, in specific implementation, the controller 11-1 can drive the servo motor 31 to rotate at a constant speed through the motor driver 11-4, so that the speed of the magnetic stirrer is fixed. It can also set a fixed mixing time, so that the mixing process can be consistent each time, reducing the error caused by manual operation and ensuring the uniformity of the suspension mixing and the accuracy of the experimental results.
[0043] The placement trays 121 symmetrically arranged on the upper surface of the carrier plate 12 can stably place the Schott flask 2, preventing the flask from shaking or tipping over during the stirring process, and further ensuring the safety and stability of the stirring process.
[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A magnetic stirrer suitable for suspensions, comprising a body (1), characterized in that: A control plate (11) is provided on one side of the upper surface of the machine body (1), and a carrier plate (12) is provided on the other side of the upper surface of the machine body (1). A Schott flask (2) is placed on the upper surface of the carrier plate (12). A stirrer (21) is provided inside the Schott flask (2). A cavity (13) is provided inside the machine body (1). A strong magnet block (34) is provided in the cavity (13) to work with the stirrer (21) to drive the stirrer (21) to stir. A power transmission mechanism is provided to drive the strong magnet block (34) to rotate. The power transmission mechanism is connected to the control plate (11).
2. The magnetic stirrer for suspensions according to claim 1, characterized in that: The number of Schott flasks (2) placed on the upper surface of the carrier plate (12) is two, and the number of stir bar (21) and strong magnet block (34) are two respectively.
3. A magnetic stirrer suitable for suspensions according to claim 2, characterized in that: The power transmission mechanism includes a servo motor (31), and a first gear (3) is fixedly connected to the output shaft of the servo motor (31). Two second gears (32) are meshed on the first gear (3) and are arranged opposite to the Schott bottle (2). A disk (33) is fixedly provided on the upper surface of the second gear (32), and two strong magnet blocks (34) are respectively arranged on the two disks (33).
4. A magnetic stirrer suitable for suspensions according to claim 3, characterized in that: The lower surface of the second gear (32) is fixedly provided with a lower support column (35), and the lower end of the lower support column (35) is rotatably connected to the lower inner wall of the cavity (13).
5. A magnetic stirrer suitable for suspensions according to claim 3, characterized in that: The upper surface of the first gear (3) is fixedly provided with an upper support column (36), and the upper end of the upper support column (36) is rotatably connected to the upper inner wall of the cavity (13).
6. A magnetic stirrer suitable for suspensions according to claim 3, characterized in that: The lower inner wall of the cavity (13) is fixedly provided with a protective shell (37), and the servo motor (31) is fixedly installed inside the protective shell (37).
7. A magnetic stirrer suitable for suspensions according to claim 1, characterized in that: The Schott bottle (2) has a cap (22) on its upper side, and a sealing ring (23) is fixed inside the cap (22).
8. A magnetic stirrer suitable for suspensions according to claim 1, characterized in that: The upper surface of the carrier plate (12) is provided with a placement tray (121), and the Schott bottle (2) is placed on the placement tray (121).
9. A magnetic stirrer suitable for suspensions according to claim 3, characterized in that: The bottom of the control board (11) is provided with a control circuit board, which integrates a control circuit. The control circuit includes a controller (11-1) and a power supply circuit (11-2) that supplies power to the servo motor (31) and each power module in the control circuit. The input terminal of the controller (11-1) is connected to an operation button (11-3), and the output terminal of the controller (11-1) is connected to a motor driver (11-4). The servo motor (31) is connected to the output terminal of the motor driver (11-4).
10. A magnetic stirrer suitable for suspensions according to claim 9, characterized in that: The controller (11-1) is a PLC controller or a microcontroller; a switch (11-5) is connected in series in the power supply circuit (11-2), and the switch (11-5) and the operation button (11-3) are exposed on the control board (11).