Anti-deviation strong magnetic force stirrer

Abstract

The utility model discloses a kind of anti-deviation strong magnetic force stirrers, including strong magnetic force mixer shell, the strong magnetic force mixer shell top is fixedly installed with bearing table, the bearing table lower end inboard is installed with outer magnetic drive part, the outer magnetic drive part outside is equipped with heat shield, the heat shield outside is provided with temperature control, covering bearing table top high-temperature exposure area to reduce touching scalding.The anti-deviation strong magnetic force stirrer, by driving part drives multiple sets of heat insulation disc to slide towards each other, both can be closely attached to the outer wall of the container to be stirred, to avoid container deviation during stirring, and can also close the high-temperature area of the bearing table after heating is completed, effectively block heat conduction, significantly reduce the risk of touching scalding;Console integrates stirring speed, heating temperature and heat insulation disc opening and closing control, simplifies operation process.Overall adaptation glass container and other scenes, especially suitable for pharmaceutical and other precision experiments that need to be heated and stirred, taking into account experimental accuracy and use safety.

Description

Technical Field

[0001] This utility model relates to the technical field of magnetic stirrers, specifically a strong magnetic stirrer that prevents deviation. Background Technology

[0002] A magnetic stirrer is a laboratory instrument used for mixing liquids. It is mainly used to stir or simultaneously heat and stir low-viscosity liquids or solid-liquid mixtures. Its basic principle is to use the principle of like poles repelling and unlike poles attracting in magnetic fields. The magnetic field drives a magnetic stir bar placed in a container to rotate in a circular motion, thereby achieving the purpose of stirring the liquid.

[0003] There are many types of existing magnetic stirrers, but they have certain shortcomings in use. The rotation speed of the stir bar in traditional thermostatic magnetic stirrers cannot be controlled. To solve the above problems, we can refer to the prior art (Chinese patent application number CN201921434498.7, application date 2019-08-31) which discloses a thermostatic magnetic stirrer with adjustable speed. This stirrer uses a reduction screw, a knob column and a spring to control the squeezing force of the tip of the second frustum on the tooth groove, thereby slowing down the rotation speed of the fan blade and achieving the purpose of speed regulation.

[0004] Although the above-mentioned device can solve the problem of uncontrollable rotation speed, it still has certain shortcomings in operation. For example, in the process of pharmaceutical manufacturing, multiple liquids need to be mixed, which requires heating and stirring. However, after stirring, the temperature on the plate is high, and touching it can easily cause burns.

[0005] Therefore, we proposed a strong magnetic stirrer with anti-deviation properties that can effectively solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a strong magnetic stirrer that prevents deviation, in order to solve the problem mentioned in the background art that the current strong magnetic stirrers on the market need to mix multiple liquids in the pharmaceutical process, which requires heating and stirring. However, after stirring, the temperature on the plate is high, and touching it can easily cause burns.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a strong magnetic stirrer with anti-deviation capability, comprising a strong magnetic stirrer housing, a support platform fixedly installed on the top of the strong magnetic stirrer housing, an external magnetic drive component installed on the inner side of the lower end of the support platform, a heat insulation cover sleeved on the outer side of the external magnetic drive component, a temperature control device provided on the outer side of the heat insulation cover, a sealed oil cavity fixedly connected to the side wall of the strong magnetic stirrer housing, a drive unit installed on the outer side of the sealed oil cavity, the working end of the drive unit connected to a drive mechanism, the execution end of the drive mechanism extending to the top of the support platform and acting on the inner side of the heat insulation plate; the heat insulation plate is slidably disposed on the outer side of the upper end of the support platform, and after heating, multiple sets of heat insulation plates can be driven by the drive unit to close in opposite directions, covering the high-temperature exposed area on the top of the support platform to reduce burns from contact.

[0008] As a preferred technical solution of this application, a control console is installed on the front outer side of the shell of the strong magnetic stirrer. The control console is electrically connected to the external magnetic drive, the temperature control, and the drive unit. The stirring speed of the external magnetic drive, the heating temperature of the temperature control, and the opening and closing state of the heat insulation plate driven by the drive unit can be controlled synchronously through the control console. The external magnetic drive is composed of a drive motor and a permanent magnet, and the output shaft of the drive motor is fixedly connected to the permanent magnet to drive the permanent magnet to rotate.

[0009] As a preferred technical solution of this application, the top of the heat insulation cover extends upward beyond the top plane of the support platform, and the top edge of the heat insulation cover is in contact with the bottom of the glass container to block the direct heat transfer between the external magnetic drive component and the glass container; a stir bar is placed inside the glass container, and the stir bar is made of an internal magnet and an external polytetrafluoroethylene material, and the stir bar and the permanent magnet of the external magnetic drive component are magnetically matched to achieve rotational stirring.

[0010] As a preferred technical solution of this application, the drive unit is composed of an adjusting motor fixedly installed on the outside of the sealing oil cavity and a lead screw fixed to the output end of the adjusting motor. The lead screw rotates through the outer wall of the sealing oil cavity, and a sealing gasket is provided at the rotating connection between the lead screw and the sealing oil cavity to prevent hydraulic medium leakage. A connecting sleeve is threaded on the outer side of the lead screw, and the end of the connecting sleeve away from the adjusting motor is fixedly connected to one side of the piston block. The outer side of the piston block slides against the inner wall of the sealing oil cavity, forming a hydraulic power source for driving the opening and closing of the heat insulation plate.

[0011] As a preferred technical solution of this application, an oil port is provided on the left side wall of the sealing oil cavity. The outer end of the oil port is connected to one end of a plurality of connecting pipes, and the other end of the connecting pipes is connected to one side of the actuator. The actuator includes a fixed cylinder fixed on one side of the upper surface of the support platform. A movable rod is slidably arranged in a sealed manner on the inner side of the fixed cylinder. One end of the movable rod is located inside the fixed cylinder and is in contact with the hydraulic medium transported by the sealing oil cavity through the connecting pipes. The other end of the movable rod extends out of the fixed cylinder and is fixed on the inner side wall of the heat insulation plate. The movable rod is pushed by the hydraulic medium to drive the heat insulation plate to slide.

[0012] As a preferred technical solution of this application, the heat insulation plates are arranged in six groups at equal angles to the center of the heat insulation cover, and the six groups of heat insulation plates move in opposite directions; the six groups of heat insulation plates move towards each other to a closed state, together forming an annular area covering the top of the support platform except for the outer perimeter of the heat insulation cover, and after closing, the edge gap between two adjacent groups of heat insulation plates is no more than 2mm; an anti-slip pad is fixedly attached to the inner side wall of the heat insulation plate, the anti-slip pad is attached to the outer side wall of the glass container, and the body of the heat insulation plate is made of ceramic heat insulation material.

[0013] As a preferred technical solution of this application, a rubber ring is nested on the outer wall of the piston block, and the outer wall of the rubber ring is tightly attached to the inner wall of the sealing oil cavity to enhance the sealing effect; the interior of the sealing oil cavity is filled with high-temperature resistant hydraulic oil, and the applicable temperature range of the high-temperature resistant hydraulic oil is -20℃ to 200℃, which can adapt to the temperature environment around the bearing platform and avoid the hydraulic oil from deteriorating due to high temperature, thus affecting the driving stability.

[0014] Compared with existing technologies, the beneficial effects of this utility model are as follows: This anti-deviation strong magnetic stirrer, through the drive unit, drives multiple sets of heat-insulating discs to slide towards each other. This ensures close contact with the outer wall of the container to be stirred, preventing container deviation during stirring, and also closes to cover the high-temperature area of ​​the support platform after heating, effectively blocking heat conduction and significantly reducing the risk of burns from contact. Simultaneously, the hydraulic drive structure ensures stable adjustment of the heat-insulating discs, and the rubber ring sealing design prevents media leakage. The control console integrates stirring speed, heating temperature, and heat-insulating disc opening and closing control, simplifying the operation process. It is suitable for glass containers and other scenarios, and is especially suitable for precision experiments requiring heating and stirring, such as pharmaceuticals, balancing experimental accuracy and safety. Specific details are as follows:

[0015] 1. With six sets of heat-insulating discs evenly distributed around the center of the heat-insulating cover, the gap between adjacent edges is ≤2m when they are closed in opposite directions. This completely covers the high-temperature exposed area of ​​the support platform except for the heat-insulating cover. The low thermal conductivity of the ceramic heat-insulating material further blocks heat transfer, reducing the risk of burns from contact after heating. At the same time, the anti-slip pads on the inside of the heat-insulating discs can closely adhere to the outer wall of the container, preventing the container from shifting during stirring and affecting the mixing uniformity, and also preventing excessive clamping force from scratching the container. Details are as follows:

[0016] 2. The drive unit employs a transmission structure that adjusts the motor and lead screw, coupled with a piston block within the sealed oil chamber. A rubber ring seal design ensures no leakage of the hydraulic medium. The high-temperature resistant hydraulic oil filling the sealed oil chamber stably withstands the temperature environment after the platform is heated, preventing hydraulic oil deterioration and adjustment failure. Furthermore, the control console integrates the electrical connection control of the external magnetic drive, temperature control, and drive unit, eliminating the need for individual component operation and simplifying the experimental process. The combination of the motor and permanent magnet in the external magnetic drive also ensures stable stirring power. The overall structure is adaptable to continuous heating and stirring conditions in the laboratory, improving experimental efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 2 This is a side view of the structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the main cross-sectional structure of the heat insulation cover of this utility model;

[0020] Figure 4 This is a top view of the glass container structure of this utility model;

[0021] Figure 5 This is a side view sectional diagram of the sealing oil cavity structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the heat insulation plate structure from below.

[0023] In the diagram: 1. Magnetic stirrer housing; 2. Control console; 3. Support platform; 4. External magnetic drive unit; 5. Heat insulation cover; 6. Temperature control unit; 7. Glass container; 8. Stirring element; 9. Sealed oil chamber; 10. Drive unit; 11. Connecting sleeve; 12. Piston block; 13. Oil port; 14. Connecting pipe; 15. Actuator; 151. Fixed cylinder; 152. Moving rod; 16. Heat insulation plate. Detailed Implementation

[0024] 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.

[0025] Please see Figures 1-6 The present invention provides the following technical solution: a strong magnetic stirrer that prevents displacement.

[0026] Example 1: To address the issue that current high-strength magnetic stirrers on the market require mixing multiple liquids during pharmaceutical manufacturing, necessitating heating and stirring, but the high temperature on the plate after stirring poses a significant risk of burns upon contact, please refer to the attached... Figure 1 - Appendix Figure 3 Appendix Figure 5 and attached Figure 6The system includes a strong magnetic stirrer housing 1, a support platform 3 fixedly mounted on the top of the housing 1, an external magnetic drive component 4 mounted on the inner side of the lower end of the support platform 3, a heat insulation cover 5 sleeved on the outer side of the external magnetic drive component 4, a temperature control device 6 set on the outer side of the heat insulation cover 5, a sealed oil cavity 9 fixedly connected to the side wall of the housing 1, a drive unit 10 mounted on the outer side of the sealed oil cavity 9, the actuating end of the drive unit 10 connected to a drive mechanism, the actuating end of the drive mechanism extending to the top of the support platform 3 and acting on the inner side of the heat insulation plate 16; the heat insulation plate 16 is slidably disposed on the outer side of the upper end of the support platform 3, and after heating is completed, multiple sets of heat insulation plates 16 can be driven by the drive unit 10 to close in opposite directions, covering the high-temperature exposed area on the top of the support platform 3 to reduce the risk of burns from contact. The drive unit 10 consists of an adjusting motor fixedly installed on the outside of the sealed oil cavity 9 and a lead screw fixed to the output end of the adjusting motor. The lead screw rotates through the outer wall of the sealed oil cavity 9, and a sealing gasket is provided at the rotating connection between the lead screw and the sealed oil cavity 9 to prevent hydraulic medium leakage. A connecting sleeve 11 is threaded on the outer side of the lead screw. The end of the connecting sleeve 11 away from the adjusting motor is fixedly connected to one side of the piston block 12. The outer side of the piston block 12 slides against the inner wall of the sealed oil cavity 9, forming a hydraulic power source for driving the opening and closing of the heat insulation plate 16. An oil port 13 is opened on the left side wall of the sealed oil cavity 9. The outer end of the oil port 13 is connected to one end of several sets of connecting pipes 14, and the other end of the connecting pipes 14... One end is connected to one side of the actuator 15; the actuator 15 includes a fixed cylinder 151 fixed to one side of the upper surface of the support platform 3. A movable rod 152 is slidably arranged inside the fixed cylinder 151 in a sealed manner. One end of the movable rod 152 is located inside the fixed cylinder 151 and contacts the hydraulic medium transported by the sealing oil chamber 9 through the connecting pipe 14. The other end of the movable rod 152 extends out of the fixed cylinder 151 and is fixed to the inner wall of the heat insulation plate 16. The movable rod 152 is pushed by the hydraulic medium to drive the heat insulation plate 16 to slide. Six sets of heat insulation plates 16 are arranged at equal angles about the center of the heat insulation cover 5. The moving directions of the six sets of heat insulation plates 16 are opposite. The six sets of heat insulation plates 16 move towards each other to a closed state, together surrounding the heat insulation cover 5. The combined structure forms an annular area covering the top of the support platform 3, excluding the outer perimeter of the heat insulation cover 5, and the edge gap between two adjacent sets of heat insulation plates 16 is no greater than 2mm after closure; an anti-slip pad is fixedly attached to the inner side wall of the heat insulation plate 16, and the anti-slip pad is attached to the outer side wall of the glass container 7, and the body of the heat insulation plate 16 is made of ceramic heat insulation material; a rubber ring is nested on the outer side wall of the piston block 12, and the outer side wall of the rubber ring is tightly attached to the inner wall of the sealing oil cavity 9 to enhance the sealing effect; the interior of the sealing oil cavity 9 is filled with high-temperature resistant hydraulic oil, the applicable temperature range of which is -20℃ to 200℃, which can adapt to the temperature environment around the support platform 3 and avoid the hydraulic oil from deteriorating due to high temperature, thus affecting the driving stability.

[0027] First, the liquid to be mixed is placed into a glass container 7 and placed on the support platform 3, so that the bottom of the container is in contact with the top edge of the heat insulation cover 5. The heat insulation cover 5 blocks the direct heat transfer between the external magnetic drive 4 and the container. The high-temperature resistant hydraulic oil filled in the sealed oil chamber 9 can adapt to the temperature environment around the support platform 3. The rubber ring on the outside of the piston block 12 ensures that the oil chamber is sealed without leakage. When heating and stirring are started, the external magnetic drive 4 provides stirring power, and the temperature control 6 regulates the heating temperature. After heating is completed, the regulating motor of the drive unit 10 is started, which drives the output end screw to rotate. The screw drives the connecting sleeve 11 to push the piston block 12 to slide in the sealed oil chamber 9 through the threaded transmission, and presses the hydraulic oil into the fixed cylinder 151 of the actuator 15 through the oil port 13 and the connecting pipe 14. Hydraulic oil pushes the moving rod 152 to slide within the fixed cylinder 151, thereby causing six sets of heat insulation plates 16, which are equidistant from the center of the heat insulation cover 5, to move towards each other until they close to form an annular area covering the top of the support platform 3 except for the outer periphery of the heat insulation cover 5. Since the body of the heat insulation plate 16 is made of ceramic heat insulation material, it can effectively block the heat conduction of the support platform 3 and avoid burns from touching it later. At the same time, the anti-slip pad on the inner side of the heat insulation plate 16 can also adhere to the outer wall of the glass container 7 during the stirring process, helping to prevent the container from shifting.

[0028] Example 2: This example differs from Example 1 in that it also discloses a structure to prevent displacement during stirring, thereby improving subsequent work efficiency. Please refer to the attached document. Figure 1 - Appendix Figure 4 A control console 2 is installed on the outer front side of the outer shell 1 of the strong magnetic stirrer. The control console 2 is electrically connected to the external magnetic drive 4, the temperature control 6, and the drive unit 10. The stirring speed of the external magnetic drive 4, the heating temperature of the temperature control 6 (which is controlled within 200℃), and the opening and closing state of the heat insulation plate 16 driven by the drive unit 10 can be controlled synchronously through the control console 2. The external magnetic drive 4 is composed of a drive motor and a permanent magnet. The output shaft of the drive motor is fixedly connected to the permanent magnet to drive the permanent magnet to rotate. The top of the heat insulation cover 5 extends upward beyond the top plane of the support platform 3. The top edge of the heat insulation cover 5 is attached to the bottom of the glass container 7 to prevent direct heat transfer between the external magnetic drive 4 and the glass container 7. A stir bar 8 is placed inside the glass container 7. The stir bar 8 is made of an internal magnet and an external polytetrafluoroethylene material. The stir bar 8 and the permanent magnet of the external magnetic drive 4 are magnetically matched to achieve rotational stirring.

[0029] First, the control console 2 is electrically connected to the external magnetic drive 4, the temperature control 6, and the drive unit 10, enabling synchronous control from a single operating end. This allows for adjusting the stirring speed of the external magnetic drive 4, setting the heating temperature via the temperature control 6, and controlling the opening and closing of the heat insulation plate 16 via the drive unit 10. This eliminates the need for individual component operation, simplifying the process. Regarding anti-stirring deviation, the external magnetic drive 4 consists of a drive motor and a permanent magnet. The motor output shaft drives the permanent magnet to rotate, using magnetic force to drive the stir bar 8 inside the glass container 7 to rotate synchronously, achieving liquid mixing. Simultaneously, the top of the heat insulation cover 5 extends beyond the top plane of the support platform 3 and adheres to the bottom of the container, forming a vertical positioning. Combined with the anti-slip pad on the inner side of the heat insulation plate 16 in Embodiment 1, it adheres to the outer wall of the container, effectively limiting container displacement both vertically and horizontally. Furthermore, the heat insulation cover 5 reduces heat transfer from the temperature control 6 to the external magnetic drive 4, preventing demagnetization of the permanent magnet, ensuring uniform liquid mixing and container stability during stirring, and improving overall work efficiency.

[0030] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0031] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A strong magnetic stirrer with anti-deviation function, comprising a strong magnetic stirrer housing (1), wherein a support platform (3) is fixedly installed on the top of the strong magnetic stirrer housing (1), an external magnetic drive component (4) is installed on the inner side of the lower end of the support platform (3), a heat insulation cover (5) is sleeved on the outer side of the external magnetic drive component (4), and a temperature control device (6) is provided on the outer side of the heat insulation cover (5), characterized in that: A sealing oil cavity (9) is fixedly connected to the side wall of the outer shell (1) of the strong magnetic stirrer. A drive unit (10) is installed on the outside of the sealing oil cavity (9). The working end of the drive unit (10) is connected to the drive mechanism. The execution end of the drive mechanism extends to the top of the support platform (3) and acts on the inside of the heat insulation plate (16). The heat insulation plate (16) is slidably disposed on the outer side of the upper end of the support platform (3). After heating is completed, multiple sets of heat insulation plates (16) can be driven by the drive unit (10) to close in opposite directions, covering the high-temperature exposed area on the top of the support platform (3) to reduce burns from contact.

2. The anti-deviation strong magnetic stirrer according to claim 1, characterized in that: A control console (2) is installed on the outer front side of the shell (1) of the strong magnetic stirrer. The control console (2) is electrically connected to the external magnetic drive (4), the temperature control (6), and the drive unit (10). The stirring speed of the external magnetic drive (4), the heating temperature of the temperature control (6), and the opening and closing state of the heat insulation plate (16) driven by the drive unit (10) can be controlled synchronously through the control console (2). The external magnetic drive (4) is composed of a drive motor and a permanent magnet, and the output shaft of the drive motor is fixedly connected to the permanent magnet to drive the permanent magnet to rotate.

3. The anti-deviation strong magnetic stirrer according to claim 1, characterized in that: The top of the heat shield (5) extends upwards beyond the top plane of the support platform (3), and the top edge of the heat shield (5) is in contact with the bottom of the glass container (7) to block the direct heat transfer between the external magnetic drive (4) and the glass container (7); a stir bar (8) is placed inside the glass container (7), which is made of a built-in magnet and an external polytetrafluoroethylene material, and the stir bar (8) and the permanent magnet of the external magnetic drive (4) are magnetically matched to achieve rotational stirring.

4. The anti-deviation strong magnetic stirrer according to claim 1, characterized in that: The drive unit (10) is composed of an adjusting motor fixedly installed on the outside of the sealing oil cavity (9) and a lead screw fixed on the output end of the adjusting motor. The lead screw rotates through the outer wall of the sealing oil cavity (9) and a sealing gasket is provided at the connection to prevent leakage. A connecting sleeve (11) is threaded on the outside of the lead screw. The end of the connecting sleeve (11) away from the adjusting motor is fixedly connected to one side of the piston block (12). The outer side of the piston block (12) slides against the inner wall of the sealing oil cavity (9), forming a hydraulic power source for driving the opening and closing of the heat insulation plate (16).

5. A strong magnetic stirrer with anti-deviation capability according to claim 4, characterized in that: An oil port (13) is provided on the left side wall of the sealed oil cavity (9). The outer end of the oil port (13) is connected to one end of several sets of connecting pipes (14). The other end of the connecting pipes (14) is connected to one side of the actuator (15). The actuator (15) includes a fixed cylinder (151) fixed on one side of the upper surface of the support platform (3). A moving rod (152) is slidably arranged in a sealed manner on the inner side of the fixed cylinder (151). One end of the moving rod (152) is located inside the fixed cylinder (151) and is in contact with the hydraulic medium transported by the sealed oil cavity (9) through the connecting pipes (14). The other end of the moving rod (152) extends out of the fixed cylinder (151) and is fixed on the inner side wall of the heat insulation plate (16). The moving rod (152) is pushed by the hydraulic medium to drive the heat insulation plate (16) to slide.

6. A strong magnetic stirrer with anti-deviation capability according to claim 5, characterized in that: The heat insulation plates (16) are arranged in six groups at equal angles to the center of the heat insulation cover (5). The six groups of heat insulation plates (16) move in opposite directions. The six groups of heat insulation plates (16) move towards each other to a closed state, together forming an annular area covering the top of the support platform (3) except for the outer periphery of the heat insulation cover (5). After closing, the edge gap between two adjacent groups of heat insulation plates (16) is no more than 2mm. An anti-slip pad is fixedly attached to the inner side wall of the heat insulation plate (16). The anti-slip pad is attached to the outer side wall of the glass container (7). The body of the heat insulation plate (16) is made of ceramic heat insulation material.

7. A strong magnetic stirrer with anti-deviation capability according to claim 4, characterized in that: A rubber ring is nested on the outer wall of the piston block (12), and the outer wall of the rubber ring is tightly attached to the inner wall of the sealing oil cavity (9) to enhance the sealing effect. The sealing oil cavity (9) is filled with high-temperature resistant hydraulic oil. The applicable temperature range of the high-temperature resistant hydraulic oil is -20℃ to 200℃, which can adapt to the temperature environment around the support platform (3) and avoid the hydraulic oil from deteriorating due to high temperature, thus affecting the driving stability.

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