A constant temperature magnetic stirrer

Abstract

The utility model discloses a constant temperature magnetic force stirrer relates to magnetic force stirrer technical field, including magnetic force stirrer host computer still includes: heating disc is established in the magnetic force stirrer host computer, gear is rotatory and is established in the magnetic force stirrer host computer, is located gear opposite side respectively and is engaged to have rack, two rack all slidingly connected with support, the support is fixedly connected with the limiting board, and two limiting boards are located the both sides of container, through pulling single rack, the utility model discloses a gear and rack structure, not only can make the container automatic with heating disc concentric, avoid the container large -scale skew, still can in the stirring process, avoid the container from heating disc drop, simultaneously, through changing the position of limiting board on rack, can when being to the container clamping limit, still can automatically drive the container and heating disc eccentric, with the solution of having the effective stirring of adhesiveness.

Description

Technical Field

[0001] This utility model belongs to the field of magnetic stirrer technology, specifically, it relates to a constant temperature magnetic stirrer. Background Technology

[0002] In laboratory research in fields such as chemistry, biology, and medicine, magnetic stirrers are core equipment for achieving contactless mixing and precise temperature control of solutions. Their advantages in preventing solution contamination and leakage make them widely used in sample dissolution, reaction system homogenization, and temperature-sensitive experiments. Their working principle is based on a built-in stator driving the rotation of a stir bar inside the container. The stir bar creates a vortex in the solution, achieving a mixing effect. Some models also integrate heating and temperature control functions to further meet the temperature requirements of experiments.

[0003] Most current mainstream magnetic stirrers rely on operators to manually place containers (such as beakers and flasks) in designated areas on the work surface, lacking effective fixing and clamping mechanisms. During stirring, on the one hand, the high-speed rotation of the stir bar generates continuous impact force as it moves the solution, especially for highly viscous solutions or large-capacity containers, making them more prone to displacement, tilting, or even tipping over. On the other hand, adjusting the stirring speed, adding reagents, or touching the equipment during the experiment may accidentally disturb the container, disrupting its initial placement. Misplacement or tipping of containers can not only lead to solution spillage, reagent waste, and experimental interruption, but also pose safety hazards related to corrosive, flammable, and explosive reagents.

[0004] Secondly, the stirring effect of a magnetic stirrer depends on the relative position of the stir bar and the container. In traditional operation, to ensure stable rotation of the stir bar, the operator usually places the container in the center of the table. At this time, the stir bar can only form a vortex in the middle of the container. When the power is transmitted through the fluid, due to viscosity attenuation and wall effect, the solution on the inner wall of the container is difficult to be quickly stirred, forming a "mixing hysteresis layer". Although some researchers have tried to achieve eccentric stirring by manually moving the container to expand the stirring trajectory coverage and break the symmetrical vortex, the existing equipment lacks a matching eccentric adjustment and positioning mechanism: on the one hand, manual adjustment is difficult to precisely control the eccentric distance. Excessive eccentricity can easily cause the stir bar to hit the container wall or leave the effective magnetic field range, causing "stirring" or stopping rotation; on the other hand, even if it is manually adjusted to a suitable eccentric position, the container may still shift due to the impact force of the solution during the stirring process, causing the eccentric state to fail and making it impossible to continuously ensure the effective mixing of the solution on the inner wall.

[0005] To address these shortcomings, a constant-temperature magnetic stirrer is proposed. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an insulated distribution cabinet that can overcome the above problems or at least partially solve the above problems.

[0007] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows: a constant temperature magnetic stirrer, including a magnetic stirrer main unit, and further including: a heating plate disposed on the magnetic stirrer main unit; a gear rotatably disposed on the magnetic stirrer main unit, with racks meshing on opposite sides of the gear, and brackets slidably connected to both racks, with limiting plates fixedly connected to the brackets, and the two limiting plates located on both sides of a container; by pulling a single rack, the two limiting plates can be moved closer or further apart simultaneously; by adjusting the stroke of the limiting plate on a single rack, the container can be made eccentric.

[0008] Preferably, a support plate is mounted on the magnetic stirrer main unit via a support column, and the heating plate is mounted on the support column located on the support plate. A gap is formed between the support plate and the upper surface of the magnetic stirrer main unit.

[0009] Preferably, the gear is rotatably connected to the support disk, and two sets of support sleeves are symmetrically fixedly connected to the support disk, with two support sleeves in each set, and the rack is slidably disposed in the support sleeve.

[0010] Preferably, a sliding sleeve is fixedly connected to one end of the bracket, the sliding sleeve is slidably connected to the rack, and a locking bolt is threaded onto the sliding sleeve.

[0011] Preferably, the magnetic stirrer main unit is equipped with an angle plate, and a locking bolt is threaded onto the angle plate to fix the rack.

[0012] Furthermore, the limiting plate is arc-shaped and has a rubber pad on its inner side.

[0013] Furthermore, the horizontal segments of the two supports are aligned in a straight line and extend through the axis of the heating plate.

[0014] Furthermore, the rack is provided with graduations.

[0015] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0016] 1. This thermostatic magnetic stirrer uses a single rack to drive a gear, which in turn drives two symmetrical racks to move synchronously in opposite directions, causing two sets of limiting plates to automatically move closer to each other. When the limiting plates are in the same initial position on the racks, the container can be automatically positioned in the center of the heating plate without the need for repeated manual adjustments. This avoids the disruption of the stirring trajectory caused by manual centering deviations and significantly improves experimental preparation efficiency.

[0017] 2. This thermostatic magnetic stirrer features an arc-shaped limiting plate that fits snugly against the outer wall of the container. Combined with a rack and pinion synchronous transmission structure, it provides stable lateral positioning of the container. Simultaneously, locking bolts on the corner plate secure the rack, preventing it from sliding during stirring and increasing the gap between the limiting plate and the container. This design effectively resists the impact force generated by the rotation of the stir bar and the solution. Even when stirring large-capacity containers or high-viscosity solutions, it prevents container displacement, tilting, or even tipping, reducing the risk of reagent spillage and experimental interruption. It significantly improves the safety of handling corrosive, flammable, and explosive reagents.

[0018] 3. This constant-temperature magnetic stirrer changes the position of a single limiting plate on the rack by sliding a sliding sleeve. The adjusted limiting plate will preferentially contact the container and push it to deflect on the heating plate, making the container and the center of the heating plate (i.e., the center of the stator and the center of the stir bar) relatively eccentric. Since the stir bar is always attracted to the stator and kept at the center of the heating plate, the rotation trajectory of the stir bar in the eccentric container will move closer to the inner wall of one side of the container. It directly drives the movement of the solution on the inner wall through friction and shear force, while breaking the symmetrical vortex and forming asymmetrical convection. This effectively weakens the influence of fluid viscosity decay and wall effect, reduces the problem of lag in mixing of the solution on the inner wall when stirring in the center, and has a particularly significant effect on improving the stirring uniformity of high-viscosity solutions (such as syrups and polymer solutions).

[0019] 4. This thermostatic magnetic stirrer's core operation can be completed in just three steps: pulling the rack, pushing the clamp, and locking the bolt. No complicated mechanical adjustments are required. The scale on the rack clearly marks the position of the sliding sleeve, making it easy for experimenters to accurately control the adjustment range of the limit plate and quickly set the container eccentricity distance. Even novice operators can easily master it, lowering the barrier to entry for using the equipment.

[0020] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0021] In the attached diagram:

[0022] Figure 1 This is a three-dimensional structural diagram of a constant temperature magnetic stirrer proposed in this utility model;

[0023] Figure 2 This is a top view of a constant temperature magnetic stirrer proposed in this utility model;

[0024] Figure 3 This is a front view of a constant temperature magnetic stirrer proposed in this utility model;

[0025] Figure 4 This is a schematic diagram of the rack and gear structure of a constant temperature magnetic stirrer proposed in this utility model.

[0026] Figure 5 This is a schematic diagram of the sliding sleeve and limiting plate of a constant temperature magnetic stirrer proposed in this utility model;

[0027] Figure 6 This is a schematic diagram showing the position of the stir bar in the container after it is eccentrically positioned.

[0028] In the diagram: 1. Magnetic stirrer main unit; 11. Support plate; 12. Support column; 13. Heating plate; 14. Container; 15. Stirrer; 16. Stator; 2. Gear; 20. Scale; 21. Rack; 22. Support sleeve; 23. Angle plate; 24. Locking bolt one; 25. Sliding sleeve; 251. Locking bolt two; 26. Bracket; 27. Limiting plate. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0030] Example: Refer to Figures 1-6 A constant-temperature magnetic stirrer includes a magnetic stirrer main unit 1, and further includes: a heating plate 13 disposed on the magnetic stirrer main unit 1; a gear 2 rotatably disposed on the magnetic stirrer main unit 1, with racks 21 meshing on opposite sides of the gear 2, and brackets 26 slidably connected to each rack 21, with limit plates 27 fixedly connected to the brackets 26, the two limit plates 27 being located on both sides of a container 14; by pulling a single rack 21, the two limit plates 27 can be moved closer or further away from each other simultaneously; by adjusting the stroke of the limit plates 27 on a single rack 21, the container 14 can be made eccentric;

[0031] A support plate 11 is mounted on the magnetic stirrer main unit 1 via a support column 12, and a heating plate 13 is mounted on the support column 12 located on the support plate 11. A gap is formed between the support plate 11 and the upper surface of the magnetic stirrer main unit 1.

[0032] Gear 2 is rotatably connected to support plate 11. Two sets of support sleeves 22 are symmetrically fixedly connected to support plate 11. Each set has two support sleeves 22. Rack 21 is slidably disposed in support sleeve 22.

[0033] One end of the bracket 26 is fixedly connected to a sliding sleeve 25, which is slidably connected to the rack 21. A locking bolt 251 is threadedly connected to the sliding sleeve 25.

[0034] An angle plate 23 is installed on the magnetic stirrer main unit 1. A locking bolt 24 is threaded onto the angle plate 23 and is used to fix the rack 21.

[0035] When using this device, first pull one of the racks 21 to move the two limiting plates 27 away from each other, thereby increasing the space between the two limiting plates 27 and making it easier to place the container 14 on the heating plate 13.

[0036] After the container 14 is placed, push one of the racks 21, which will mesh and drive the gear 2 to rotate, thereby causing the other rack 21 to move together. At this time, the two symmetrically arranged limiting plates 27 move closer to each other and clamp the container 14.

[0037] Since one gear 2 drives two meshing racks 21 simultaneously, when the two limiting plates 27 are in the same position on the racks 21, pushing one of the racks 21 will cause the two limiting plates 27 to move closer together at the same time, and will automatically place the container 14 in the center of the heating plate 13. There is no need to manually readjust the position of the container 14 on the heating plate 13, so that the container 14 is placed in the center of the heating plate 13, avoiding large-scale tilting.

[0038] The limiting plate 27 is arc-shaped and has a rubber pad on its inner side. The main function of the limiting plate 27 is to limit the container 14 without clamping it. When the limiting plate 27 is located on both sides of the container 14, the locking bolt 24 on the corner plate 23 is turned so that the end of the locking bolt 24 with the friction pad is in close contact with the outer side of the rack 21, preventing the rack 21 from sliding freely and causing the gap between the limiting plate 27 and the outer wall of the container 14 to increase.

[0039] Then place the stir bar 15 into the container 14, turn on the switch at the back of the magnetic stirrer main unit 1, and adjust the temperature control knob and stirring speed knob on the magnetic stirrer main unit 1 to select appropriate parameters to stir the liquid in the container 14.

[0040] In another method of use, after the container 14 is placed, the limiting plate 27 on one of the racks 21 is adjusted to be closer to the heating plate 13. The adjustment method is as follows: change the position of the sliding sleeve 25 on the rack 21, and after adjustment, tighten the locking bolt 251 to fix the sliding sleeve 25 to the rack 21. Then push one of the racks 21 to bring the two limiting plates 27 closer together. Since one of the limiting plates 27 has changed position, the limiting plate 27 that has changed position will first contact the container 14 on the heating plate 13 (the priority contact here means that the container 14 is at the center of the heating plate 13, that is, the positional deviation of the container 14 on the heating plate 13 is small). Then the limiting plate 27 that contacts the container 14 pushes the container 14 to move on the heating plate 13, thereby changing the relative position of the container 14 and the heating plate 13.

[0041] The magnetic stirrer main unit 1 is equipped with a motor, and a stator 16 is installed on the motor output end. The motor output end extends the stator 16 to the bottom of the heating plate 13, and the stator 16 is located at the center of the heating plate 13.

[0042] Since the stir bar 15 inside the container 14 is attracted to the stator 16, the stir bar 15 will not change its position relative to the stator 16. That is, the stir bar 15 is still located at the center of the heating plate 13. After the motor inside the magnetic stirrer host 1 is started, the motor drives the stator 16 to rotate, and the stir bar 15 rotates accordingly, so that the stir bar 15 rotates at the eccentric position inside the container 14 to stir the solution.

[0043] When the container 14 is stirred at the center of the heating plate 13, the rotation trajectory of the stir bar 15 is a concentric circle with the center of the container 14 as the center. The power can only cover a "small area" around the trajectory, and the power is reduced due to the distance to the inner wall of the container 14.

[0044] When container 14 is eccentric, the rotation trajectory of stir bar 15 is still a concentric circle, but the center of the circle is deviated from the center of container 14 (i.e., relatively eccentric). At this time, the trajectory of stir bar 15 will move closer to one side of the inner wall of container 14. For example, if container 14 is eccentric to the right side of the magnetic stir bar 1, the rotation trajectory of stir bar 15 will be closer to the right side of the inner wall of container 14, while it will be slightly farther away on the left side.

[0045] This trajectory, close to one side of the inner wall, allows the stir bar 15 to directly drive the solution on the inner wall near the side through friction and shear force, while simultaneously driving the solution on the other side of the inner wall through fluid convection. This overcomes the problem of insufficient inner wall power and improves the effective mixing of viscous liquids.

[0046] Furthermore, after the container 14 is clamped and located in the heating plate 13, the container 14 can be made eccentric by changing the position of the upper limit plate 27 of one of the racks 21.

[0047] Furthermore, during use, when the solution in container 14 is low, the rack 21 can be manually pushed and pulled back and forth while the stir bar 15 is rotating, so that container 14 moves back and forth on heating plate 13, thereby changing the position of stir bar 15 in container 14, making the stirring more thorough and faster. This operation needs to be carried out under safe conditions, including but not limited to the solution not being corrosive, irritating, not volatile toxic gases, and not at high temperatures.

[0048] The horizontal sections of the two supports 26 are in a straight line and run through the axis of the heating plate 13, which can prevent the container 14 from tilting when it is clamped.

[0049] The rack 21 is provided with a scale 20 to make it easy to know the position of the sliding sleeve 25 on the rack 21.

[0050] Therefore, the gear 2 and rack 21 structure designed in this device can not only automatically align the container 14 with the heating plate 13 to prevent the container 14 from tilting significantly, but also prevent the container 14 from falling off the heating plate 13 during the stirring process. At the same time, by changing the position of the limiting plate 27 on the rack 21, when clamping and limiting the container 14, it can also automatically drive the container 14 to be eccentric with the heating plate 13 for effective stirring of viscous solutions.

[0051] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A thermostatic magnetic stirrer, comprising a magnetic stirrer main unit (1), characterized in that, Also includes: A heating plate (13) is provided on the magnetic stirrer main unit (1); Gear (2) is rotatably mounted on the magnetic stirrer main unit (1). Racks (21) are meshed and connected to the opposite sides of gear (2). Supports (26) are slidably connected to both racks (21). Limiting plates (27) are fixedly connected to the supports (26). The two limiting plates (27) are located on both sides of the container (14). By pulling a single rack (21), the two limiting plates (27) can be moved closer or further away from each other at the same time. By adjusting the stroke of the limiting plate (27) on a single rack (21), the container (14) can be made eccentric.

2. The thermostatic magnetic stirrer according to claim 1, characterized in that, The magnetic stirrer main unit (1) is equipped with a support plate (11) via a support column (12), and the heating plate (13) is mounted on the support column (12) located on the support plate (11). The support plate (11) and the upper surface of the magnetic stirrer main unit (1) are spaced apart.

3. The thermostatic magnetic stirrer according to claim 2, characterized in that, The gear (2) is rotatably connected to the support disk (11), and two sets of support sleeves (22) are symmetrically fixedly connected to the support disk (11), with two support sleeves (22) in each set. The rack (21) is slidably disposed in the support sleeve (22).

4. A thermostatic magnetic stirrer according to claim 3, characterized in that, One end of the bracket (26) is fixedly connected to a sliding sleeve (25), which is slidably connected to the rack (21). A locking bolt (251) is threaded onto the sliding sleeve (25).

5. A thermostatic magnetic stirrer according to claim 4, characterized in that, The magnetic stirrer main unit (1) is equipped with a corner plate (23), and a locking bolt (24) is threaded onto the corner plate (23) to fix the rack (21).

6. A thermostatic magnetic stirrer according to claim 1, characterized in that, The limiting plate (27) is arc-shaped and has a rubber pad on its inner side.

7. A thermostatic magnetic stirrer according to claim 1, characterized in that, The horizontal segments of the two supports (26) are in a straight line and pass through the axis of the heating plate (13).

8. A thermostatic magnetic stirrer according to claim 4, characterized in that, The rack (21) is provided with a scale (20).

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