Electromagnetic stirrer and experimental apparatus

Abstract

The application relates to an electromagnetic stirrer and experimental equipment. The electromagnetic stirrer comprises a stirring platform, a fixed plate connected to the stirring platform in a spaced manner, a plurality of groups of magnetic rotating parts arranged on the fixed plate, and a driving system for driving the plurality of groups of magnetic rotating parts to rotate; wherein the plurality of groups of magnetic rotating parts are arranged on the same side of the fixed plate close to the stirring platform and are arranged correspondingly to different stirring areas of the stirring platform; the driving system comprises a plurality of driving mechanisms, the plurality of driving mechanisms are connected to the plurality of groups of magnetic rotating parts one by one, and the plurality of driving mechanisms are used for driving the plurality of groups of magnetic rotating parts to rotate in different directions respectively, wherein two groups of magnetic rotating parts arranged adjacently rotate in different directions to generate a superimposed rotating magnetic field in a space area where the stirring platform is located. The scheme provided by the application increases the working area of the stirring platform and ensures the uniformity of the magnetic field in each area of the stirring platform, and can satisfy sufficient stirring of a high-concentration solution.

Description

Technical Field

[0001] This application relates to the field of automation equipment technology, and in particular to electromagnetic stirrers and experimental equipment. Background Technology

[0002] An electromagnetic stirrer is a laboratory instrument used for mixing liquids, primarily to ensure that reactants are mixed evenly. Its basic principle is based on the repulsion and attraction of like poles in a magnetic field. The magnetic field drives a magnetic stir bar placed in a container to rotate in a circular motion, thus achieving the purpose of stirring.

[0003] The electromagnetic stirrers in related technologies have limited magnetic field distribution range, resulting in a small stirring table size, which makes it impossible to carry out large-scale stirring experiments. In addition, the magnetic field strength is uneven at the edge of the magnetic field, making it difficult to fully stir reagents with high concentrations. Summary of the Invention

[0004] To solve or partially solve the problems existing in the related technologies, this application provides an electromagnetic stirrer and experimental equipment, which effectively increases the working area of ​​the stirring platform and ensures the uniformity of the magnetic field in various areas of the stirring platform, while satisfying the requirement of sufficient stirring of high-concentration solutions and improving the efficiency of stirring experiments.

[0005] The first aspect of this application provides an electromagnetic stirrer, characterized in that it comprises:

[0006] A mixing platform, a fixed plate spaced apart from the mixing platform, multiple sets of magnetic rotating components mounted on the fixed plate, and a drive system for driving the multiple sets of magnetic rotating components to rotate.

[0007] The multiple sets of magnetic rotating components are all located on the same side of the fixed plate near the stirring platform, and are respectively set to different stirring areas of the stirring platform.

[0008] The drive system includes multiple drive mechanisms, which are connected one-to-one with multiple sets of magnetic rotating components. The multiple drive mechanisms are used to drive the multiple sets of magnetic rotating components to rotate, wherein two adjacent sets of magnetic rotating components rotate in different directions to generate superimposed rotating magnetic fields in the spatial region where the stirring platform is located.

[0009] In one embodiment, multiple sets of the magnetic rotating elements are arranged along the same plane on the same side of the fixed plate.

[0010] In one embodiment, the magnetic rotating element is provided in at least two groups, and the number of magnetic rotating elements in each group is at least two;

[0011] The magnetic rotating components in the same group rotate in the same direction.

[0012] In one embodiment, the magnetic rotating component is provided in two sets, with two magnetic rotating components in each set. The four magnetic rotating components in the two sets are respectively disposed at the four vertices of the virtual quadrilateral on the fixed plate, and the two sets of magnetic rotating components are respectively arranged along the two diagonals of the virtual quadrilateral.

[0013] The drive system includes two drive mechanisms, which are used to drive two sets of magnetic rotating parts to rotate in different directions respectively. The two magnetic rotating parts on the same diagonal rotate in the same direction, while the magnetic rotating parts on different diagonals rotate in opposite directions.

[0014] In one embodiment, the mixing platform includes four mixing zones, and the center of each mixing zone is projected onto the vertex of the virtual quadrilateral along the thickness direction of the fixed plate.

[0015] In one embodiment, it further includes four rotating assemblies, each of the magnetic rotating elements being connected to the fixed plate via the rotating assembly. Each rotating assembly includes a rotating shaft rotatably connected to the fixed plate, and the magnetic rotating element is connected to the rotating shaft.

[0016] Each of the drive mechanisms is connected to two of the rotating shafts arranged along the same diagonal for driving the two rotating shafts to rotate.

[0017] In one embodiment, the drive mechanism includes a motor, a drive wheel, two driven wheels, and a timing belt; the drive wheel is connected to the output shaft of the motor, the two driven wheels are respectively connected to two rotating shafts arranged along the same diagonal, and the timing belt is wound between the drive wheel and the two driven wheels.

[0018] In one embodiment, the two drive mechanisms have the same structure and are located on opposite sides of the fixed plate.

[0019] In one embodiment, the rotation planes of the timing belts of the two drive mechanisms are parallel to the plane of the fixed plate; the projections of the timing belts of the two drive mechanisms intersect in the thickness direction of the fixed plate.

[0020] In one embodiment, the drive mechanism further includes a tension adjustment mechanism, which includes a tension wheel mounted on the fixed plate, the inner side of the synchronous belt being wound around the driving wheel and the driven wheel, and the outer side of the synchronous wheel being wound around the tension wheel.

[0021] In one embodiment, a guide groove is provided on the fixed plate corresponding to the position of the tensioning wheel. The tension adjustment mechanism further includes a sliding member installed in the guide groove and a connecting shaft connecting the sliding member and the tensioning wheel. One end of the connecting shaft is fixedly connected to the sliding member, and the other end of the connecting shaft is rotatably connected to the tensioning wheel.

[0022] In one embodiment, the fixed plate has a mounting hole, the rotating shaft passes through the mounting hole, and the two ends of the rotating shaft are respectively located on both sides of the fixed plate; the rotating assembly also includes a bearing assembly installed in the mounting hole and an axial preload structure for axially preloading the bearing assembly, and the rotating shaft is rotatably connected to the fixed plate through the bearing assembly;

[0023] The bearing assembly is fitted with an axial preload structure, which includes a retaining ring and an end cap disposed on the upper and lower sides of the bearing assembly. The retaining ring and the end cap are used to axially confine the bearing assembly within the mounting hole.

[0024] In one embodiment, the diameter of the driving wheel is larger than the diameter of the driven wheel, and the diameters of the driven wheels corresponding to the magnetic rotating members in each group are equal.

[0025] In one embodiment, a sensing component is further included in cooperation with each of the drive mechanisms. The sensing component includes a sensor fixedly disposed relative to the fixed plate and a sensing element fixedly disposed relative to the rotation axis. The sensor is used to sense the rotation signal of the sensing element as it rotates with the rotation axis.

[0026] In one embodiment, the system further includes a support plate and a housing. The support plate is disposed on the side of the fixed plate opposite to the magnetic rotating component. The support plate is connected to the fixed plate through multiple connecting columns. The housing is disposed between the stirring platform and the fixed plate, and multiple sets of the magnetic rotating components are accommodated within the housing.

[0027] A second aspect of this application provides an experimental apparatus, comprising: an experimental platform and at least one electromagnetic stirrer as described above, wherein the electromagnetic stirrer is disposed on the experimental platform.

[0028] The technical solution provided in this application may include the following beneficial effects:

[0029] This application provides an electromagnetic stirrer. Since multiple magnetic rotating components are respectively arranged to correspond to different stirring areas of the stirring platform, when the drive system drives two adjacent sets of magnetic rotating components to rotate in different directions, the multiple magnetic rotating components can generate a uniform rotating magnetic field in their respective areas and in areas adjacent to different magnetic rotating components. This achieves uniformity in electromagnetic stirring, effectively increasing the working area of ​​the stirring platform, and thus facilitating large-scale stirring experiments. Furthermore, the magnetic fields generated by the multiple magnetic rotating components are superimposed, resulting in a stronger magnetic field. Under the induction effect of the magnetic rod cooperating with the magnetic rotating components, liquids with high viscosity can be stirred more thoroughly, improving the efficiency of stirring experiments.

[0030] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0031] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0032] Figure 1 This is a schematic diagram of the structure of an electromagnetic stirrer from one perspective, as shown in an embodiment of this application;

[0033] Figure 2 yes Figure 1 A schematic diagram of the electromagnetic stirrer from another perspective, as shown in the embodiment;

[0034] Figure 3 yes Figure 1 Cross-sectional view at point AA along the middle;

[0035] Figure 4 This is a side view of an electromagnetic stirrer shown in one embodiment of this application;

[0036] Figure 5 This is a three-dimensional structural schematic diagram of an electromagnetic stirrer according to an embodiment of this application;

[0037] Figure 6 This is a schematic diagram of the external structure of an electromagnetic stirrer shown in one embodiment of the application;

[0038] Figure 7 This is a schematic diagram showing the arrangement of the magnetic rotating components of an electromagnetic stirrer according to an embodiment of this application;

[0039] Figure 8 This is a schematic diagram showing the arrangement of the magnetic rotating components of an electromagnetic stirrer according to another embodiment of this application.

[0040] Reference numerals: 100, fixed plate; 200, stirring platform; 300, support plate; 400, protective cover; 500, shell; 110, 110a, 110b, 110c, magnetic rotating parts; 111, rotating shaft; 310, connecting column; 320, mounting bracket; 322, circuit board; 120, motor; 121, driving wheel; 122, driven wheel; 123, synchronous belt; 124, tensioning wheel ; 1241, Connecting shaft; 130, Sensing assembly; 131, Fixing bracket; 132, Sensor; 133, Sensing element; 150, Guide groove; 151, Sliding element; 1511, Slide groove; 1111, End cap; 1112, Outer bushing; 1113, Inner bushing; 1114, Bearing assembly; 1114a, 1114b, Deep groove ball bearings; 1115, Preload nut; 1116, Retaining ring. Detailed Implementation

[0041] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0042] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0043] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0044] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] The electromagnetic stirrers in related technologies have limited magnetic field distribution range, resulting in a small stirring platform size, which makes it impossible to carry out large-scale stirring experiments. In addition, the magnetic field strength is uneven at the edge of the magnetic field, making it difficult to fully stir reagents with high concentrations.

[0046] To address the aforementioned issues, this application provides an electromagnetic stirrer that effectively increases the working area of ​​the stirring platform and ensures the uniformity of the magnetic field across all areas of the platform, while also satisfying the requirement for thorough stirring of high-concentration solutions, thereby improving the efficiency of stirring experiments.

[0047] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0048] Figure 1 This is a schematic diagram of the structure of an electromagnetic stirrer from one perspective, as shown in an embodiment of this application; Figure 5 This is a three-dimensional structural schematic diagram of an electromagnetic stirrer according to an embodiment of this application.

[0049] See Figure 1 and Figure 5 This application provides an electromagnetic stirrer, including a stirring platform 200, a fixed plate 100 spaced apart from the stirring platform 200, multiple sets of magnetic rotating members 110 mounted on the fixed plate 100, and a drive system for driving the multiple sets of magnetic rotating members 110 to rotate. The multiple sets of magnetic rotating members 110 are located on the same side of the fixed plate 100, for example, on the upper side of the fixed plate 100, and are respectively arranged corresponding to different stirring areas of the stirring platform 200. The drive system includes multiple drive mechanisms, each connected to one of the multiple sets of magnetic rotating members 110. The multiple drive mechanisms are used to drive the multiple sets of magnetic rotating members 110 to rotate, wherein two adjacent sets of magnetic rotating members 110 rotate in different directions to generate superimposed rotating magnetic fields in the spatial region where the stirring platform 200 is located.

[0050] In this embodiment, the magnetic rotating component 110 can be a circular or elongated block magnet. The magnetic rotating component 110 is rotatably mounted on the fixed plate 100, for example, connected to the fixed plate 100 via a rotating shaft 111. Multiple sets of magnetic rotating components 110 are arranged on the same side of the fixed plate 100 along the same plane, which is parallel to the stirring platform. The magnetic force generated by the multiple magnetic rotating components in different stirring areas of the stirring platform is equal, thereby improving the stirring uniformity of different stirring areas.

[0051] The mixing platform 200 is parallel to the fixed plate 100 and is fixedly connected to the fixed plate 100. Multiple sets of magnetic rotating parts 110 are located between the fixed plate 100 and the mixing platform 200, and are vertically aligned with different mixing areas of the mixing platform 200.

[0052] In this embodiment, the stirring platform 200 is used to place containers (such as test tubes, reagent bottles, etc.), which contain reagents to be stirred. The stirring platform 200 has a set shape and size, which can be determined according to the size and arrangement of the multiple magnetic rotating parts 110 and the range of the magnetic field generated by the magnetic rotating parts 110.

[0053] Since multiple magnetic rotating elements 110 are arranged corresponding to different stirring areas of the stirring platform 200, multiple driving mechanisms can drive multiple sets of magnetic rotating elements 110 to rotate synchronously. Furthermore, two adjacent sets of magnetic rotating elements 110 rotate in different directions. Therefore, multiple magnetic rotating elements 110 can generate a relatively uniform rotating magnetic field in their respective areas and in adjacent areas, achieving uniformity in electromagnetic stirring and effectively increasing the working area of ​​the stirring platform 200, thus facilitating large-scale stirring experiments. Specifically, two adjacent sets of magnetic rotating elements 110 rotate in opposite directions, and all magnetic rotating elements 110 in the same set rotate in the same direction.

[0054] In addition, the magnetic fields generated by multiple magnetic rotating parts 110 are superimposed, resulting in a stronger magnetic field. Under the induction of a magnetic rod or magnetic particle that works in conjunction with the magnetic rotating parts, the liquid with higher viscosity can be stirred more thoroughly, thus improving the efficiency of the stirring experiment.

[0055] In this embodiment, the magnetic rotating element 110 can be provided in at least two groups, with each group containing at least one magnetic rotating element 110. To increase the working area of ​​the stirring platform 200 and ensure the uniformity of the magnetic field in all areas of the stirring platform 200, preferably, the magnetic rotating element 110 can be provided in at least two groups, such as two groups, four groups, six groups, or other values, with each group containing at least two magnetic rotating elements 110, such as two, three, four, or other values, which are not limited here. For example, the magnetic rotating element 110 can be provided in two groups, with each group including two magnetic rotating elements 110; or, for example, the magnetic rotating element 110 can be provided in two groups, with each group including three magnetic rotating elements 110; or, for example, the magnetic rotating element 110 can be provided in four groups, with each group including two magnetic rotating elements 110.

[0056] In some embodiments, the magnetic rotating element 110 is provided in two sets, namely magnetic rotating elements 110a and 110b, with each set containing two magnetic rotating elements 110. That is, one set of magnetic rotating elements 110 includes two magnetic rotating elements 110a, and the other set includes two magnetic rotating elements 110b. The two magnetic rotating elements 110a and two magnetic rotating elements 110b are respectively disposed at the four vertices of the virtual quadrilateral R on the fixed plate 100, and the two magnetic rotating elements 110a and two magnetic rotating elements 110b are respectively arranged along the two diagonals of the virtual quadrilateral R.

[0057] In this embodiment, the stirring platform 200 may include four stirring zones, and the projection point of the center of each stirring zone onto the thickness direction of the fixed plate 100 is the vertex of the virtual quadrilateral R. The virtual quadrilateral R may be rectangular, and the stirring platform 200 may be set as a rectangle, with the four sides of the virtual quadrilateral R parallel to the four sides of the stirring platform 200. Alternatively, the stirring platform 200 may also be circular, without limitation.

[0058] In this embodiment, the driving system includes two driving mechanisms, which drive two sets of magnetic rotating components 110a and 110b to rotate respectively. The two magnetic rotating components 110a on the same diagonal rotate in the same direction, while those on different diagonals rotate in opposite directions. That is, the two magnetic rotating components 110a and 110b rotate in the same direction, but in opposite directions. For example, the two magnetic rotating components 110a rotate clockwise, and the two magnetic rotating components 110b rotate counterclockwise.

[0059] In some embodiments, the two drive mechanisms used to drive the two sets of magnetic rotating parts 110a and 110b have the same structure. The two drive mechanisms can be a synchronous pulley and synchronous belt mating mechanism or a gear meshing mechanism, which is not limited here.

[0060] In this embodiment, the electromagnetic stirrer may further include multiple rotating components, each connected to a magnetic rotating element 110 in a one-to-one correspondence. The rotating components are used to drive the magnetic rotating elements 110 to rotate under the drive of the driving mechanism. Specifically, one driving mechanism drives the rotating components connected to the same group of magnetic rotating elements 110 to rotate.

[0061] In some embodiments, such as Figures 3 to 5 As shown, the electromagnetic stirrer includes four rotating components. Each magnetic rotating element 110 is connected to the fixed plate 100 through the rotating component. The rotating component includes a rotating shaft 111 rotatably connected to the fixed plate 100. The magnetic rotating element 110 is fixed on the corresponding rotating shaft 111 and can rotate together with the corresponding rotating shaft 111.

[0062] In one implementation, the magnetic rotating element 110 is detachably fixed to the end of the rotating shaft 111, for example, by a screw connected to the end of the rotating shaft 111.

[0063] In this embodiment, each drive mechanism is connected to two rotating shafts 111 arranged along the same diagonal, and is used to drive the two rotating shafts 111 arranged along the same diagonal to rotate.

[0064] In this embodiment, each drive mechanism may include a motor, a driving wheel connected to the motor, multiple driven wheels, and a synchronous belt for connecting the driving wheel and the multiple driven wheels. The multiple driven wheels are connected one-to-one with multiple rotating shafts 111 corresponding to the same set of magnetic rotating components 110. When the driven wheels rotate, they drive the rotating shafts 111 to rotate together.

[0065] In some embodiments, such as Figure 4 As shown, the drive mechanism includes a motor 120, a drive wheel 121, two driven wheels 122, and a timing belt 123. The drive wheel 121 is located on the output shaft of the motor 120, the two driven wheels 122 are respectively connected to two rotating shafts 111 arranged along the same diagonal, and the timing belt 123 is wound between the drive wheel 121 and the two driven wheels 122.

[0066] The motor 120 can be a synchronous motor 120. When the motor 120 starts, the output shaft of the motor 120 drives the drive wheel 121 to rotate. The drive wheel 121 can drive the two driven wheels 122 to rotate through the synchronous belt 123. When the driven wheels 122 rotate, they can drive the two rotating shafts 111 and the magnetic rotating component 110 arranged along the same diagonal to rotate together.

[0067] In some embodiments, the diameter of the driving wheel 121 is larger than that of the driven wheel 122, and the diameters of the driven wheels 122 corresponding to each group of magnetic rotating members 110 are equal. This allows multiple magnetic rotating members 110 in the same group to rotate at a set rotational speed, and the rotational speeds of the multiple magnetic rotating members 110 remain consistent.

[0068] See Figure 1 , Figure 2 and Figure 4 In some embodiments, the two drive mechanisms are located on both sides of the fixed plate 100, and the rotation plane of the synchronous belt 123 of the two drive mechanisms is parallel to the plane of the fixed plate 100. The fixed plate 100 can not only fix the two drive mechanisms, but also separate the two drive mechanisms to avoid interference when the two drive mechanisms move. In addition, it makes the structure of the electromagnetic stirrer more compact.

[0069] In this embodiment, the output shafts of the two drive mechanisms motors 120 are parallel to the thickness direction of the fixed plate 100 and face opposite directions. That is, the two motors 120 are inverted and symmetrically installed in the thickness direction of the fixed plate 100. When the output shafts of the two motors 120 rotate in the same direction at the same time, when viewed from the upper or lower side of the fixed plate 100, the magnetic rotating parts 110 corresponding to the two motors 120 rotate in opposite directions. Therefore, superimposed rotating magnetic fields can be generated in the spatial region where the stirring platform 200 is located.

[0070] In this embodiment, two sets of magnetic rotating members 110 are respectively arranged along the two diagonals of the virtual quadrilateral R, and four magnetic rotating members 110 are distributed at the four vertices of the virtual quadrilateral R. The motors 120 of the two drive mechanisms can be respectively positioned close to the two opposite sides of the virtual quadrilateral R, and each motor 120 is located between the two vertices of the virtual quadrilateral R. The running directions of the synchronous belts 123 of the two drive mechanisms are respectively along the two diagonals of the virtual quadrilateral R. The projections of the synchronous belts 123 of the two drive mechanisms intersect in the thickness direction of the fixed plate 100, which reduces the space occupied by the two drive mechanisms while enabling independent operation of the two drive mechanisms.

[0071] In some embodiments, such as Figure 1 and Figure 2 As shown, the drive mechanism also includes a tension adjustment mechanism, which includes a tension wheel 124 mounted on the fixed plate 100. The synchronous belt 123 is also wound around the tension wheel 124. The tension wheel 124 is an idler wheel. The position of the tension wheel 124 on the fixed plate 100 can be adjusted in a set direction, thereby tensioning the synchronous belt 123 and ensuring the operational stability of the drive mechanism.

[0072] See Figure 2In some embodiments, a guide groove 150 is provided on the fixed plate 100 at the position corresponding to the tension wheel 124. The tension adjustment mechanism also includes a sliding member 151 installed in the guide groove 150 and a connecting shaft 1241 connecting the sliding member 151 and the tension wheel 124. One end of the connecting shaft 1241 is fixedly connected to the sliding member 151, and the other end of the connecting shaft 1241 is rotatably connected to the tension wheel 124. The sliding member 151 is connected to the fixed plate 100 via a pre-tightening connector. The pre-tightening connector is used to limit the sliding member 151 to a preset position within the guide groove 150. In some embodiments, two sliding grooves 1511 are provided on the sliding member 151 corresponding to the two sides of the tensioning wheel 124. The two sliding grooves 1511 are provided on the two sides of the guide groove 150. Pre-tightening connectors connected to the fixed plates 100 on both sides of the guide groove 150 are respectively inserted into the two sliding grooves 1511. The pre-tightening connector can be a screw threaded to the fixed plate. By adjusting the screw, the position of the sliding member 151 in the guide groove 150 can be changed.

[0073] The guide groove 150 can be a slide groove formed on the fixed plate 100, the sliding member 151 can be a slider, and the pre-tightening connector can be a threaded connector or a snap-fit ​​connector connected between the sliding member 151 and the fixed plate 100.

[0074] In this embodiment, the two tension adjustment mechanisms are respectively located close to the motor 120 of the corresponding drive mechanism and within the range defined by the virtual quadrilateral R. The two tension adjustment mechanisms are respectively located on both sides of the fixed plate 100, arranged symmetrically, and the two tension wheels 124 face opposite directions.

[0075] The inner side of the synchronous belt 123 is wrapped around the driving pulley 121 and the driven pulley 122, while the outer side of the synchronous belt 123 is wrapped around the tension pulley 124. When the sliding member 151 is moved, the corresponding tension pulley 124 also moves. The movement of the tension pulley 124 can change the center distance between the tension pulley 124 and the driving pulley 121 and the driven pulley 122. Therefore, with the length of the synchronous belt 123 fixed, moving the tension pulley 124 can adjust the tension of the synchronous belt 123.

[0076] In some embodiments, the fixed plate 100 has a mounting hole, and the rotating shaft 111 passes through the mounting hole. The two ends of the rotating shaft 111 are located on both sides of the fixed plate 100. The rotating assembly also includes a bearing assembly 1114 installed in the mounting hole. The bearing assembly 1114 is located between the rotating shaft 111 and the hole wall of the mounting hole. The rotating shaft 111 is rotatably connected to the fixed plate 100 through the bearing assembly 1114.

[0077] In one implementation, the mounting hole can be a through hole formed in the fixed plate 100, through which the rotating shaft 111 passes, with both ends of the rotating shaft 111 located on both sides of the fixed plate 100. The bearing assembly 1114 may include two deep groove ball bearings 1114a and 1114b arranged side by side in the vertical direction. The two deep groove ball bearings 1114a and 1114b can improve the radial load capacity of the rotating shaft 111 and enhance structural stability.

[0078] In some embodiments, an inner bushing 1113 and an outer bushing 1112 are provided in the mounting hole. The outer bushing 1112 is located between the outer ring of the bearing assembly 1114 and the wall of the mounting hole, and the inner bushing 1113 is located between the inner ring of the bearing assembly 1114 and the rotating shaft 111. By providing the inner bushing 1113 and the outer bushing 1112, the support stiffness of the upper and lower deep groove ball bearings can be effectively enhanced.

[0079] In some embodiments, the rotating assembly further includes an axial preload structure. The bearing assembly 1114 cooperates with the axial preload structure. The axial preload mechanism includes a retaining ring 1116 and an end cap 1111 located on the upper and lower sides of the bearing assembly 1114. The retaining ring 1116 and the end cap 1111 are used to axially confine the bearing assembly 1114 within the mounting hole. The retaining ring 1116 is located on the lower side of the bearing assembly 1114, and the end cap 1111 is located on the upper side of the bearing assembly 1114. The bearing assembly 1114 can be inserted into the mounting hole from the upper side. The retaining ring 1116 and the end cap 1111 can axially limit and preload the bearing assembly 1114, preventing relative axial displacement between the bearing assembly 1114 and the rotating shaft 111 during movement. The end cap 1111 can be fixed to the fixing plate 100 with screws.

[0080] In this embodiment, the axial preload structure also includes a preload nut 1115 connected to the rotating shaft 111. The preload nut 1115 is located on the rotating shaft 111 at one end where the retaining ring 1116 is located. By rotating the preload nut 1115, the tightness of the fit between the retaining ring 1116 and the bearing assembly 1114 can be adjusted, making the installation of the bearing assembly 1114 more stable.

[0081] The retaining ring 1116 is fitted onto the rotating shaft 111 and rotates with it. One end of the retaining ring 1116 abuts against the bearing assembly 1114. When the lower end of the rotating shaft 111 is connected to the driven wheel 122, the other end of the retaining ring 1116 abuts against one end of the driven wheel 122, and the other end of the driven wheel 122 abuts against the preload nut 1115. When the upper end of the rotating shaft 111 is connected to the driven wheel 122, the other end of the retaining ring 1116 directly abuts against the preload nut 1115.

[0082] See Figure 1 and Figure 2The electromagnetic stirrer in this embodiment also includes a sensing component 130 that cooperates with the drive mechanism, wherein each drive mechanism is provided with a corresponding sensing component 130. The sensing component 130 includes a sensor 132 disposed on the fixed plate 100 and a sensing element 133 fixed relative to the driven wheel 122. The sensor 132 is used to sense the rotation signal of the sensing element 133 in a non-contact manner.

[0083] The sensor 133 can be a sheet-like structure and can be mounted on the rotating shaft 111 of the driven wheel 122. The sensor 132 is mounted on one side of the rotating shaft 111 via a mounting bracket 131. When the output shaft of the motor 120 rotates, the sensor 133 rotates together with the rotating shaft 111 of the driven wheel 122. After each rotation of the sensor 133, when it passes the sensor 132, the sensor 132 will sense the signal of the sensor 133, thus generating a record of the change in the sensing signal. This allows the determination of whether the drive mechanism is working properly. If the drive mechanism malfunctions, such as when the timing belt 123 is damaged, the rotating shaft 111 of the driven wheel 122 stops rotating, and therefore the sensor 133 also stops rotating. The sensor 132 cannot sense the rotation signal of the sensor, and therefore will not generate a change in the sensing signal for a certain period of time, thus enabling timely detection of drive system fault information.

[0084] Figure 6 This is a schematic diagram of the external structure of an electromagnetic stirrer shown in one embodiment of the application.

[0085] See Figure 5 and Figure 6 The electromagnetic stirrer in this embodiment also includes a support plate 300, which is disposed on the side of the fixed plate 100 opposite to the magnetic rotating member 110, for example, at the bottom of the fixed plate 100. Therefore, the support plate 300 is also called a base plate. The support plate 300 is connected to the fixed plate 100 through a plurality of connecting posts 310, so that a certain accommodating space is formed between the support plate 300 and the fixed plate 100 for accommodating the drive mechanism located on the lower side of the fixed plate 100.

[0086] The electromagnetic stirrer in this embodiment also includes a housing 500, which is disposed between the stirring platform 200 and the fixed plate 100. Multiple sets of magnetic rotating parts 110 and a drive mechanism located on the upper side of the fixed plate 100 are housed in the housing 500.

[0087] In this embodiment, the fixing plate 100, the stirring platform 200 and the support plate 300 can be made of aluminum alloy, but are not limited to aluminum alloy.

[0088] In some embodiments, a circuit board 322 is also mounted on one side of the support plate 300. The motors 120 of the two drive mechanisms are connected to the circuit board 322 through conductive components. The circuit board 322 can send control signals to the two motors 120, thereby controlling the operation of the two motors 120. The circuit board 322 is arranged vertically and fixed to one side of the support plate 300 by a mounting bracket 320. A protective cover 400 is also provided on the outside of the circuit board 322 to protect the circuit board 322 and prevent damage to it.

[0089] As can be seen from the above embodiments, when multiple sets of magnetic rotating parts 110 rotate synchronously in opposite directions, the electromagnetic stirrer of this embodiment can generate a relatively uniform rotating magnetic field in their respective areas and in the adjacent areas of different magnetic rotating parts 110, thereby achieving uniformity of electromagnetic stirring. This effectively increases the working area of ​​the stirring platform 200 and ensures the uniformity of the magnetic field in each area of ​​the stirring platform 200. At the same time, it satisfies the requirement for thorough stirring of high-concentration solutions, greatly improving the efficiency of stirring experiments.

[0090] Additionally, see Figure 7 In one embodiment, the magnetic rotating components 110 are provided in two sets, namely magnetic rotating components 110a and 110b, with three magnetic rotating components 110 in each set. That is, one set of magnetic rotating components 110 includes three magnetic rotating components 110a, and the other set of magnetic rotating components 110 includes three magnetic rotating components 110b. The three magnetic rotating components 110a are respectively disposed at the three vertices of a virtual triangle T1 on the fixed plate 100, and the three magnetic rotating components 110b are respectively disposed at the three vertices of another virtual triangle T2 on the fixed plate 100. The two virtual triangles T1 and T2 are symmetrically arranged and face opposite directions. One side of the two virtual triangles T1 and T2 is parallel, and one vertex of the two virtual triangles T1 and T2 coincides with the midpoint of the opposite side of that vertex. In this embodiment, the stirring platform 200 may include six stirring areas, and the projection point of the center position of each stirring area in the thickness direction of the fixed plate 100 is the vertex of each of the two virtual triangles T1 and T2. The magnetic rotating parts 110a and 100b are driven by their respective driving mechanisms. When the magnetic rotating parts 110a and 100b rotate in opposite directions, they can generate superimposed rotating magnetic fields in the space region where the stirring platform 200 is located.

[0091] See Figure 8In one embodiment, the magnetic rotating components 110 are provided in four groups, namely magnetic rotating components 110a, 110b, 110c, and 110d, with two magnetic rotating components 110 in each group. Two magnetic rotating components 110a and two magnetic rotating components 110b are respectively located at the four vertices of a virtual quadrilateral R1 on the fixed plate 100, and two magnetic rotating components 110c and two magnetic rotating components 110d are respectively located at the four vertices of another virtual quadrilateral R2 on the fixed plate 100. The two magnetic rotating components 110a and two magnetic rotating components 110b are respectively arranged along the two diagonals of the virtual quadrilateral R1, and the two magnetic rotating components 110c and two magnetic rotating components 110d are respectively arranged along the two diagonals of the virtual quadrilateral R2. In this embodiment, the stirring platform 200 may include eight stirring zones, and the projection point of the center position of each stirring zone onto the thickness direction of the fixed plate 100 is one of the vertices of the two virtual quadrilaterals R1 and R2. Magnetic rotating components 110a, 110b, 110c, and 110d are each driven by a corresponding driving mechanism. When adjacent groups of magnetic rotating components 110 rotate in opposite directions, they can generate superimposed rotating magnetic fields in the spatial region where the stirring platform 200 is located. The electromagnetic stirrer of this application embodiment has been described above. Correspondingly, this application also provides an experimental device, which includes an experimental platform and at least one electromagnetic stirrer as described in the above embodiment. The electromagnetic stirrer is disposed on the experimental platform. The structure of the electromagnetic stirrer is described in the above embodiment and will not be repeated here.

[0092] The experimental apparatus provided in this embodiment utilizes an electromagnetic stirrer where multiple magnetic rotating components generate a relatively uniform rotating magnetic field within their respective areas and adjacent areas, achieving uniform electromagnetic stirring and effectively increasing the working area of ​​the stirring platform, thus facilitating large-scale stirring experiments. Furthermore, by setting multiple electromagnetic stirrers on the experimental platform, high-throughput stirring experiments can be achieved.

[0093] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An electromagnetic stirrer, characterized in that, include: A mixing platform, a fixed plate spaced apart from the mixing platform, multiple sets of magnetic rotating components mounted on the fixed plate, and a drive system for driving the multiple sets of magnetic rotating components to rotate. Among them, multiple sets of magnetic rotating components are all arranged on the side of the fixed plate near the stirring platform, along the same plane on the same side of the fixed plate, and respectively corresponding to different stirring areas of the stirring platform; The drive system includes multiple drive mechanisms, which are connected one-to-one with multiple sets of magnetic rotating parts. The multiple drive mechanisms are used to drive the multiple sets of magnetic rotating parts to rotate, wherein two adjacent sets of magnetic rotating parts rotate in different directions to generate superimposed rotating magnetic fields in the space area where the stirring platform is located. The mixing platform includes four mixing zones. The center of each mixing zone is projected onto the vertex of the virtual quadrilateral R along the thickness direction of the fixed plate. The magnetic rotating components are provided in two sets, with two magnetic rotating components in each set. The four magnetic rotating components in the two sets are respectively located at the four vertices of the virtual quadrilateral R, and the two sets of magnetic rotating components are respectively arranged along the two diagonals of the virtual quadrilateral R. Alternatively, the mixing platform includes eight mixing zones. The center of each mixing zone is projected onto the vertices of two virtual quadrilaterals R1 and R2 along the thickness direction of the fixed plate. The magnetic rotating components are provided in four groups, with two magnetic rotating components in each group. Two groups of magnetic rotating components are located at the four vertices of the virtual quadrilateral R1, and the other two groups are located at the four vertices of the virtual quadrilateral R2. The two virtual quadrilaterals R1 and R2 are spaced apart, and the magnetic rotating components in the same group are located on the same diagonal of the same virtual quadrilateral. In this configuration, two magnetic rotating components on the same diagonal of any virtual quadrilateral rotate in the same direction, while magnetic rotating components on different diagonals rotate in opposite directions.

2. The electromagnetic stirrer according to claim 1, characterized in that: In the case where the stirring platform includes four stirring zones, the drive system includes two drive mechanisms, which are used to drive the two sets of magnetic rotating parts to rotate in different directions respectively.

3. The electromagnetic stirrer according to claim 2, characterized in that, It also includes four rotating components, and each of the magnetic rotating components is connected to the fixed plate through the rotating components; The rotating assembly includes a rotating shaft rotatably connected to the fixed plate, and the magnetic rotating component is connected to the rotating shaft; Each of the drive mechanisms is connected to two of the rotating shafts arranged along the same diagonal for driving the two rotating shafts to rotate.

4. The electromagnetic stirrer according to claim 3, characterized in that: The drive mechanism includes a motor, a drive wheel, two driven wheels, and a timing belt; the drive wheel is connected to the output shaft of the motor, the two driven wheels are respectively connected to two rotating shafts arranged along the same diagonal, and the timing belt is wound between the drive wheel and the two driven wheels.

5. The electromagnetic stirrer according to claim 3, characterized in that: The two drive mechanisms have the same structure and are located on both sides of the fixing plate in the thickness direction.

6. The electromagnetic stirrer according to claim 4, characterized in that: The rotation planes of the synchronous belts of the two drive mechanisms are parallel to the plane of the fixed plate; the projections of the synchronous belts of the two drive mechanisms intersect in the thickness direction of the fixed plate.

7. The electromagnetic stirrer according to claim 6, characterized in that, The drive mechanism further includes a tension adjustment mechanism, which includes a tension wheel mounted on the fixed plate. The inner side of the synchronous belt is wound around the driving wheel and the driven wheel, and the outer side of the synchronous belt is wound around the tension wheel.

8. The electromagnetic stirrer according to claim 7, characterized in that: The fixed plate has a guide groove corresponding to the position of the tensioning wheel. The tension adjustment mechanism also includes a sliding member installed in the guide groove and a connecting shaft connecting the sliding member and the tensioning wheel. One end of the connecting shaft is fixedly connected to the sliding member, and the other end of the connecting shaft is rotatably connected to the tensioning wheel.

9. The electromagnetic stirrer according to claim 3, characterized in that: The fixing plate has mounting holes, the rotating shaft passes through the mounting holes, and the two ends of the rotating shaft are respectively located on both sides of the fixing plate; The rotating assembly further includes a bearing assembly installed in the mounting hole and an axial preload structure for axially preloading the bearing assembly. The rotating shaft is rotatably connected to the fixed plate through the bearing assembly. The bearing assembly is fitted with an axial preload structure, which includes a retaining ring and an end cap disposed on the upper and lower sides of the bearing assembly. The retaining ring and the end cap are used to axially confine the bearing assembly within the mounting hole.

10. The electromagnetic stirrer according to claim 4, characterized in that: The diameter of the driving wheel is larger than that of the driven wheel, and the diameters of the driven wheels corresponding to the magnetic rotating components in each group are equal.

11. The electromagnetic stirrer according to claim 4, characterized in that: It also includes a sensing component that cooperates with each of the drive mechanisms. The sensing component includes a sensor fixedly disposed relative to the fixed plate and a sensing element fixedly disposed relative to the rotating shaft. The sensor is used to sense the rotation signal of the sensing element as it rotates with the rotating shaft.

12. The electromagnetic stirrer according to any one of claims 1-11, characterized in that: It also includes a support plate and a housing. The support plate is located on the side of the fixed plate opposite to the magnetic rotating component. The support plate is connected to the fixed plate through multiple connecting columns. The housing is located between the stirring platform and the fixed plate. Multiple sets of the magnetic rotating components are housed in the housing.

13. An electromagnetic stirrer, characterized in that, include: A mixing platform, a fixed plate spaced apart from the mixing platform, multiple sets of magnetic rotating components mounted on the fixed plate, and a drive system for driving the multiple sets of magnetic rotating components to rotate. Among them, multiple sets of magnetic rotating components are all arranged on the side of the fixed plate near the stirring platform, along the same plane on the same side of the fixed plate, and respectively corresponding to different stirring areas of the stirring platform; The drive system includes multiple drive mechanisms, which are connected one-to-one with multiple sets of magnetic rotating parts. The multiple drive mechanisms are used to drive the multiple sets of magnetic rotating parts to rotate, wherein two adjacent sets of magnetic rotating parts rotate in different directions to generate superimposed rotating magnetic fields in the space area where the stirring platform is located. The mixing platform includes six mixing zones. The center of each mixing zone is projected onto the vertices of two virtual triangles T1 and T2 along the thickness direction of the fixed plate. There are two sets of magnetic rotating components, with three magnetic rotating components in each set. The three magnetic rotating components in one set are located at the three vertices of the virtual triangle T1, and the three magnetic rotating components in the other set are located at the three vertices of the virtual triangle T2. The two virtual triangles T1 and T2 are symmetrically arranged and face opposite directions. One side of each virtual triangle T1 and T2 is parallel, and one vertex of each virtual triangle T1 and T2 coincides with the midpoint of the side opposite to that vertex.

14. An experimental apparatus, characterized in that, It includes: an experimental platform and at least one electromagnetic stirrer as described in any one of claims 1-13, wherein the electromagnetic stirrer is disposed on the experimental platform.

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