Magnetic stirrer for biological experiment

Abstract

The utility model discloses a magnetic stirrer for biological experiments, which comprises a magnetic base, a heating table mounted at the top of the magnetic base, a beaker placed at the top of the heating table, moving components arranged on two sides of the heating table on the magnetic base, a moving plate mounted on the moving components, a first lifting component mounted on the moving plate, and a second lifting component mounted on the first lifting component. A clamping assembly is installed on the first lifting assembly, a second lifting assembly is installed on one side of the magnetic base, a transverse plate is installed on the second lifting assembly, a stirring assembly is installed at the position, over the heating table, of the transverse plate, and a cover plate is installed on the stirring assembly. The beaker is clamped, the stability of the beaker in use is improved, normal operation of a biological experiment is ensured, the stirring area is increased and the stirring effect is better through dual stirring of the stirring assembly and the stirrer, the top of the beaker is shielded through the cover plate, the situation that liquid medicine splashes in the stirring process is effectively prevented, and the stirring efficiency is improved. Subsequent operation is facilitated, and the use safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic stirrers, in particular to a magnetic stirrer used in biological experiments. Background Art

[0002] A magnetic stirrer is a laboratory instrument used for liquid mixing. It is mainly used for stirring or simultaneously heating and stirring low-viscosity liquids or solid-liquid mixtures. Its basic principle is to use the principle of like charges repelling and opposite charges attracting in the magnetic field. The magnetic field is used to drive the magnetic stirrer placed in the container to rotate in a circle, thereby achieving the purpose of stirring the liquid. Magnetic stirrers are often used in biological experiments.

[0003] A Chinese patent with prior art announcement number CN219399965U discloses a rapid mixing magnetic stirrer for biological laboratories. The magnetic stirrer has a clamping mechanism that allows the height of the arc-shaped clamp to be adjusted up and down according to the size of the beaker and the height of the solution in the beaker, thereby facilitating uniform heating of the solution in the beaker and improving the applicability of the magnetic stirrer.

[0004] Although the above patent can clamp the beaker, the stirring area of ​​the stirring rod is generally small, resulting in a long stirring time and poor stirring effect. In addition, since the top of the beaker is not covered, when the liquid is stirred in the biological experiment, the liquid in the beaker is prone to splashing, and the splashing liquid will cause a greater safety hazard. At the same time, the liquid splashed on the magnetic stirrer needs to be cleaned up later, causing inconvenience in operation.

[0005] Therefore, the applicant proposes a magnetic stirrer for biological experiments to solve the above problems. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model aims to provide a magnetic stirrer for use in biological experiments.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0008] A magnetic stirrer used in biological experiments comprises a magnetic base, a heating platform is installed on the top of the magnetic base, a beaker is placed on the top of the heating platform, moving components are provided on both sides of the magnetic base located on the heating platform, a moving plate is installed on the moving component, a first lifting component is installed on the moving plate, a clamping component is installed on the first lifting component, a second lifting component is installed on one side of the magnetic base, a cross plate is installed on the second lifting component, a stirring component is installed on the cross plate directly above the heating platform, and a cover plate is installed on the stirring component.

[0009] Furthermore, the moving component includes a mounting base installed on both sides of the magnetic base, a slot is opened on one side of the mounting base, and a guide slot is opened on the other side of the mounting base, and the same bidirectional screw rod is rotatably arranged in the two slots, and both ends of the bidirectional screw rod are located in the slot and are threadedly connected with a first threaded block, a first guide rod is arranged in the guide slot, and a guide block is slidably arranged on the first guide rod, and a moving plate is installed on the top of the first threaded block and the guide block, and one end of the bidirectional screw rod extends out of the mounting base and is connected to the first hand wheel.

[0010] Furthermore, the first lifting assembly includes a first screw rod which is vertically rotatable and arranged on one side of the movable plate, a second guide rod is vertically arranged on the other side of the movable plate, a clamping assembly is installed on the first screw rod and the second guide rod, and the top of the first screw rod is connected to the second hand wheel.

[0011] Furthermore, the clamping assembly includes a mounting plate threadedly connected to the first screw rod, and the mounting plate is slidably connected to the second guide rod, a connecting rod that passes through the mounting plate is slidably installed on the mounting plate, a clamping plate is installed at one end of the connecting rod, and a limiting block is installed at the other end of the connecting rod, and a spring mounted on the outer surface of the connecting rod is connected between the clamping plate and the mounting plate.

[0012] Furthermore, the second lifting assembly includes an installation box installed on one side of the magnetic base, a second screw rod is vertically rotatable in the installation box, and the second screw rod passes through the top of the installation box and extends out of the installation box, a second bevel gear is installed on the second screw rod and located in the installation box, a first rotating shaft is rotatably provided on one side of the installation box, one end of the first rotating shaft extends into the installation box and is installed with a first bevel gear, the other end of the first rotating shaft is connected to a third hand wheel, the first bevel gear and the second bevel gear are meshed with each other, a second threaded block is threadedly connected to the part of the second screw rod extending out of the installation box, and a cross plate is installed on the second threaded block.

[0013] Furthermore, the stirring assembly includes a micro motor installed on the top of the horizontal plate, the output end of the micro motor is connected to a second rotating shaft, a plurality of stirring blades are installed at the bottom of the second rotating shaft, and a cover plate is slidably installed on the second rotating shaft.

[0014] Furthermore, a groove is formed at the bottom of the cover plate, a fixing plate is mounted on the second rotating shaft, a protrusion is formed on the top of the fixing plate, and the protrusion can be moved out of or into the groove.

[0015] Furthermore, a temperature sensor is installed on one side of the cover plate, and an exhaust port is provided on the other side of the cover plate.

[0016] Furthermore, a third guide rod is installed on one side of the clamping plate close to the mounting plate, and one end of the third guide rod away from the clamping plate passes through the mounting plate.

[0017] Furthermore, a fourth guide rod is vertically provided on the top of the installation box, and the fourth guide rod passes through the second threaded block and is slidably connected to the second threaded block.

[0018] Compared with the prior art, the utility model provides a magnetic stirrer for biological experiments, which has the following beneficial effects:

[0019] The utility model adjusts the distance between the clamping components by moving the component, and can be adjusted according to the size of the beaker. The height of the clamping component can be adjusted by the first lifting component, and the height of the clamping component can be adjusted up and down according to the height of the solution in the beaker. The beaker is clamped by the clamping component to be fixed on the heating table, so as to prevent it from tipping over and spilling the liquid medicine, thereby improving the stability of the beaker when in use and ensuring the normal progress of the biological experiment. The height of the stirring component can be adjusted by the second lifting component, and the stirring component can be used for double stirring together with the stirring bar, thereby increasing the stirring area and achieving better stirring effect. The top of the beaker is shielded by arranging a cover plate, so as to effectively prevent the liquid medicine from splashing during the stirring process, facilitate subsequent operations, and improve safety in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model;

[0021] Figure 2 It is a front view structural schematic diagram of the utility model;

[0022] Figure 3 It is a schematic diagram of the top view structure of the utility model;

[0023] Figure 4 It is a schematic diagram of the top view of the structure of the utility model without the cover plate;

[0024] Figure 5 It is a right side cross-sectional structural schematic diagram of the utility model;

[0025] Figure 6 It is a right view structural schematic diagram of the utility model;

[0026] Figure 7 yes Figure 5 A schematic diagram of the enlarged structure at A in the middle;

[0027] Figure 8 It is a left-side structural schematic diagram of the movable plate of the utility model.

[0028] Markings in the figure: 1, magnetic base; 2, heating table; 21, heating wire; 3, moving assembly; 31, mounting seat; 32, slot; 33, bidirectional screw; 34, first threaded block; 35, first hand wheel; 36, guide groove; 37, first guide rod; 38, guide block; 4, moving plate; 5, first lifting assembly; 51, first screw rod; 52, second hand wheel; 53, second guide rod; 6, clamping assembly; 61, mounting plate; 62, connecting rod; 63, clamping plate; 64, spring; 65, limit block; 66. third guide rod; 7. second lifting assembly; 71. mounting box; 72. second screw rod; 73. first bevel gear; 74. first rotating shaft; 75. third hand wheel; 76. second bevel gear; 77. second threaded block; 78. fourth guide rod; 8. horizontal plate; 9. stirring assembly; 91. micro motor; 92. second rotating shaft; 93. stirring blade; 10. cover plate; 11. beaker; 12. temperature sensor; 13. groove; 14. fixing plate; 15. bump; 16. exhaust port; 17. supporting foot. DETAILED DESCRIPTION

[0029] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0030] The standard parts used in the utility model can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt the conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0031] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the description of the present invention, "plurality" means two or more than two, unless otherwise clearly and specifically defined.

[0034] The utility model embodiment provides a magnetic stirrer used in biological experiments, referring to Figures 1 to 8 , comprising a magnetic base 1, a heating platform 2 is installed on the top of the magnetic base 1, a beaker 11 is placed on the top of the heating platform 2, moving components 3 are provided on both sides of the magnetic base 1 located on the heating platform 2, a moving plate 4 is installed on the moving component 3, a first lifting component 5 is installed on the moving plate 4, a clamping component 6 is installed on the first lifting component 5, a second lifting component 7 is installed on one side of the magnetic base 1, a horizontal plate 8 is installed on the second lifting component 7, a stirring component 9 is installed on the horizontal plate 8 just above the heating platform 2, a cover plate 10 is installed on the stirring component 9 to shield the top of the beaker 11, effectively prevent the splashing of the liquid medicine during the stirring process, facilitate subsequent operations, and improve the safety of use.

[0035] Specifically, a heating wire 21 is provided in the heating table 2, and the liquid medicine in the beaker 11 is heated by heating the heating wire 21; the distance between the clamping components 6 can be adjusted according to the size of the beaker 11 through the moving component 3; the height of the clamping component 6 can be adjusted up and down according to the height of the solution in the beaker 11 through the first lifting component 5; the beaker 11 is clamped by the clamping component 6 to be fixed on the heating table 2 to prevent it from tipping over and spilling the liquid medicine, thereby improving the stability of the beaker 11 when in use and ensuring the normal progress of the biological experiment; the height of the stirring component 9 can be adjusted by the second lifting component 7; the second lifting component 7 is adjacent to the moving components 3 on both sides; through the stirring component 9, double stirring can be performed together with the stirring bar, thereby increasing the stirring area and achieving a better stirring effect; the stirring component 9 is located directly above the beaker 11, and the axis of the beaker 11 is made to be the same as the axis of the stirring component 9 through the clamping component 6, thereby improving the stirring effect.

[0036] Support feet 17 are installed at the four corners of the bottom of the magnetic base 1, so that the magnetic base 1 can achieve better stability when placed.

[0037] Reference Figure 1 , Figure 3 and Figure 8In this embodiment, the moving component 3 includes a mounting base 31 installed on both sides of the magnetic base 1, a slot 32 is opened on one side of the mounting base 31, and a guide slot 36 is opened on the other side of the mounting base 31. The same bidirectional screw rod 33 is rotatably arranged in the two slots 32, and both ends of the bidirectional screw rod 33 are located in the slots 32 and are threadedly connected with a first threaded block 34. A first guide rod 37 is arranged in the guide slot 36, and a guide block 38 is slidably arranged on the first guide rod 37. A moving plate 4 is installed on the top of the first threaded block 34 and the guide block 38, and one end of the bidirectional screw rod 33 extends out of the mounting base 31 and is connected to the first hand wheel 35.

[0038] Specifically, the two ends of the bidirectional screw rod 33 respectively penetrate the two mounting seats 31 and extend into the slot 32. The threads at the two ends of the bidirectional screw rod 33 have opposite rotation directions, so that the clamping assembly 6 can be close to or away from each other, and the bidirectional screw rod 33 does not interfere with the heating table 2; the number of the bidirectional screw rod 33 is 1, the number of the first guide rods 37 is 2, and the number of the movable plates 4 is 2; the top of the first threaded block 34 and the top of the guide block 38 are installed with the same movable plate 4; the stability of the movement of the movable plate 4 is improved by the arrangement of the first guide rod 37 and the guide block 38;

[0039] Reference Figure 1 , Figure 3 and Figure 5 In this embodiment, the first lifting assembly 5 includes a first screw rod 51 which is vertically rotatable and is arranged on one side of the movable plate 4, and a second guide rod 53 is vertically arranged on the other side of the movable plate 4, so that the clamping assembly 6 can move up and down more stably. The clamping assembly 6 is installed on the first screw rod 51 and the second guide rod 53, and the top of the first screw rod 51 is connected to the second hand wheel 52.

[0040] Reference Figure 1 and Figure 3 In this embodiment, the clamping assembly 6 includes a mounting plate 61 threadedly connected to the first screw rod 51, and the mounting plate 61 is slidably connected to the second guide rod 53. A connecting rod 62 penetrating the mounting plate 61 is slidably mounted on the mounting plate 61. A clamping plate 63 is mounted at one end of the connecting rod 62 to clamp and fix the beaker 11. A limiting block 65 is mounted at the other end of the connecting rod 62 to reduce the possibility of the connecting rod 62 detaching from the mounting plate 61. A spring 64 is connected between the clamping plate 63 and the mounting plate 61 and is sleeved on the outer surface of the connecting rod 62.

[0041] Specifically, one end of the mounting plate 61 is threadedly connected to the first screw rod 51, and the other end of the mounting plate 61 is slidably connected to the second guide rod 53; the second guide rod 53 improves the stability of the up and down movement of the mounting plate 61; the clamping plate 63 is arranged in an arc shape to increase the contact area;

[0042] The first hand wheel 35 is turned, and the first hand wheel 35 drives the bidirectional screw rod 33 to rotate. The bidirectional screw rod 33 drives the first threaded block 34 to move along the slot 32, thereby driving the movable plate 4 to move, and then driving the clamping plate 63 to move in the direction close to the beaker 11. When the clamping plate 63 contacts the beaker 11, the first hand wheel 35 is continuously turned, and the mounting plate 61 continues to move in the direction of the beaker 11. At this time, the spring 64 is compressed, and the clamping plate 63 is subjected to the elastic force of the spring 64, so that the clamping plate 63 clamps the beaker 11 more stably.

[0043] Among them, refer to Figure 1 and Figure 3 In this embodiment, a third guide rod 66 is installed on one side of the clamping plate 63 close to the mounting plate 61 , and one end of the third guide rod 66 away from the clamping plate 63 passes through the mounting plate 61 .

[0044] Specifically, there are two third guide rods 66 on each clamping plate 63, and the connecting rods 62 are symmetrically arranged. One end of the third guide rod 66 is connected to the clamping plate 63, and the other end of the third guide rod 66 passes through the mounting plate 61. The third guide rod 66 increases the stability of the movement of the clamping plate 63, so that the clamping plate 63 can better clamp and fix the beaker 11.

[0045] Reference Figure 3 and Figure 5 In this embodiment, the second lifting assembly 7 includes an installation box 71 installed on one side of the magnetic base 1, and a second screw rod 72 is vertically rotatable in the installation box 71, and the second screw rod 72 passes through the top of the installation box 71 and extends out of the installation box 71, and a second bevel gear 76 is installed on the second screw rod 72 located in the installation box 71, and a first rotating shaft 74 is rotatably provided on one side of the installation box 71, one end of the first rotating shaft 74 extends into the installation box 71 and is installed with a first bevel gear 73, the other end of the first rotating shaft 74 is connected to the third hand wheel 75, the first bevel gear 73 and the second bevel gear 76 are meshed with each other, and a second threaded block 77 is threadedly connected to the part of the second screw rod 72 extending out of the installation box 71, and a cross plate 8 is installed on the second threaded block 77.

[0046] Specifically, the first bevel gear 73 and the second bevel gear 76 are perpendicular to each other; the thread on the second screw rod 72 is located at the upper part of the second screw rod 72 .

[0047] The third hand wheel 75 is rotated, and the third hand wheel 75 drives the first rotating shaft 74 to rotate. The first rotating shaft 74 drives the first bevel gear 73 to rotate. The first bevel gear 73 drives the second bevel gear 76 to rotate. The second bevel gear 76 drives the second screw rod 72 to rotate. The second screw rod 72 drives the second threaded block 77 to move up and down, thereby driving the cross plate 8 to move up and down.

[0048] Among them, refer to Figure 5 and Figure 6 In this embodiment, a fourth guide rod 78 is vertically provided on the top of the installation box 71 to increase the stability of the second threaded block 77 when it moves up and down. The fourth guide rod 78 passes through the second threaded block 77 and is slidably connected to the second threaded block 77.

[0049] Reference Figure 1 and Figure 5 In this embodiment, the stirring assembly 9 includes a micro motor 91 installed on the top of the horizontal plate 8, a second rotating shaft 92 is connected to the output end of the micro motor 91, a plurality of stirring blades 93 are installed at the bottom of the second rotating shaft 92, and a cover plate 10 is slidably installed on the second rotating shaft 92.

[0050] Specifically, the axis of the second rotating shaft 92 is the same as the axis of the beaker 11; the second rotating shaft 92 passes through the transverse plate 8 and extends to the bottom of the transverse plate 8, and the second rotating shaft 92 is rotationally connected to the transverse plate 8; there is a gap between the second rotating shaft 92 and the cover plate 10, and the second rotating shaft 92 does not drive the cover plate 10 to rotate.

[0051] When auxiliary stirring of the liquid medicine is required, the horizontal plate 8 continues to descend, so that the stirring blade 93 extends into the liquid medicine, and the micro motor 91 drives the second rotating shaft 92 and the stirring blade 93 to stir, thereby achieving double stirring with the stirring bar, making the liquid medicine stirred more evenly.

[0052] Reference Figure 5 and Figure 7 In this embodiment, a groove 13 is formed at the bottom of the cover plate 10 , a fixing plate 14 is mounted on the second rotating shaft 92 , and a protrusion 15 is formed on the top of the fixing plate 14 , and the protrusion 15 can be moved out of or into the groove 13 .

[0053] Specifically, the groove 13 is an annular groove; the protrusion 15 is an annular protrusion, and the cover 10 is positioned by the protrusion 15 and the groove 13. When the cover 10 covers the top of the beaker 11, the second rotating shaft 92 continues to descend, and the protrusion 15 and the groove 13 will separate. When the second rotating shaft 92 rises, the protrusion 15 will move back into the groove 13. At this time, when the second rotating shaft 92 continues to rise, the fixed plate 14 will drive the cover 10 to rise together, making it convenient to take out the beaker 11.

[0054] Reference Figure 5 and Figure 6 In this embodiment, a temperature sensor 12 is installed on one side of the cover plate 10 to detect the temperature in the beaker 11, and an exhaust port 16 is provided on the other side of the cover plate 10 to balance the air pressure in the beaker 11.

[0055] Specifically, the temperature sensor 12 does not interfere with the stirring blade 93 .

[0056] In this embodiment, rubber pads are provided on the bottom of the cover plate 10 and on the side of the clamping plate 63 facing the beaker 11 to avoid damage to the beaker 11 .

[0057] In this embodiment, the heating wire 21, the micro motor 91 and the temperature sensor 12 are all existing technologies and will not be described in detail here.

[0058] Working principle: during use, when the liquid medicine needs to be stirred, first pour the liquid medicine to be stirred into the beaker 11, then place a stirring bar into the beaker 11, and then place the beaker 11 on the heating table 2, turn the second hand wheel 52, the second hand wheel 52 drives the first screw rod 51 to rotate, thereby driving the mounting plate 61 to move up and down, and adjusting the height of the clamping plate 63 according to the height of the solution in the beaker 11, and then turn the first hand wheel 35, the first hand wheel 35 drives the bidirectional screw rod 33 to rotate, the bidirectional screw rod 33 drives the first threaded block 34 to move along the slot 32, thereby driving the moving plate 4 to move, and then driving the clamping plate 63 to move in the direction close to the beaker 11, when the clamping plate 63 contacts the beaker 11, continue to turn the first hand wheel 35, the mounting plate 61 continues to move in the direction of the beaker 11, at this time the spring 64 is compressed, and the clamping plate 63 is subjected to the elastic force of the spring 64, so that the clamping plate 63 clamps the beaker 11 more stably; At this time, the axis of the beaker 11 is the same as the axis of the second rotating shaft 92. By rotating the third hand wheel 75, the third hand wheel 75 drives the first rotating shaft 74 to rotate, the first rotating shaft 74 drives the first bevel gear 73 to rotate, the first bevel gear 73 drives the second bevel gear 76 to rotate, the second bevel gear 76 drives the second screw rod 72 to rotate, and the second screw rod 72 drives the second threaded block 77 to move downward, thereby driving the cross plate 8 to move downward, so that the cover plate 10 covers the top of the beaker 11, and the liquid medicine in the beaker 11 is heated by the heating wire 21, and the stirring bar is driven to rotate by the mutual repulsion between the magnetic forces to stir the liquid medicine in the beaker 11; when it is necessary to auxiliary stir the liquid medicine, the stirring blade 93 is extended into the liquid medicine by the continued descent of the cross plate 8, and at the same time, the second rotating shaft 92 and the stirring blade 93 are driven by the micro motor 91 to stir, thereby doubly stirring with the stirring bar, thereby increasing the stirring area and making the stirring effect better.

[0059] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0060] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. A magnetic stirrer for biological experiments, comprising a magnetic base (1), characterized in that: A heating platform (2) is installed on the top of the magnetic base (1), a beaker (11) is placed on the top of the heating platform (2), moving components (3) are provided on both sides of the heating platform (2) on the magnetic base (1), a moving plate (4) is installed on the moving component (3), a first lifting component (5) is installed on the moving plate (4), a clamping component (6) is installed on the first lifting component (5), a second lifting component (7) is installed on one side of the magnetic base (1), a horizontal plate (8) is installed on the second lifting component (7), a stirring component (9) is installed on the horizontal plate (8) directly above the heating platform (2), and a cover plate (10) is installed on the stirring component (9).

2. The magnetic stirrer for biological experiments according to claim 1, characterized in that: The moving assembly (3) comprises a mounting seat (31) mounted on both sides of the magnetic base (1); a slot (32) is provided on one side of the mounting seat (31); a guide slot (36) is provided on the other side of the mounting seat (31); a same bidirectional screw rod (33) is rotatably provided in the two slots (32); two ends of the bidirectional screw rod (33) are located in the slots (32) and are threadedly connected to a first thread block (34); a first guide rod (37) is provided in the guide slot (36); a guide block (38) is slidably provided on the first guide rod (37); a moving plate (4) is installed on the top of the first thread block (34) and the guide block (38); one end of the bidirectional screw rod (33) extends out of the mounting seat (31) and is connected to a first hand wheel (35).

3. The magnetic stirrer for biological experiments according to claim 2, characterized in that: The first lifting assembly (5) comprises a first screw rod (51) which is vertically rotatably arranged on one side of the movable plate (4), and a second guide rod (53) is vertically arranged on the other side of the movable plate (4). A clamping assembly (6) is installed on the first screw rod (51) and the second guide rod (53), and the top of the first screw rod (51) is connected to the second hand wheel (52).

4. The magnetic stirrer for biological experiments according to claim 3, characterized in that: The clamping assembly (6) comprises a mounting plate (61) threadedly connected to the first screw rod (51), and the mounting plate (61) is slidably connected to the second guide rod (53), a connecting rod (62) penetrating the mounting plate (61) is slidably mounted on the mounting plate (61), a clamping plate (63) is mounted on one end of the connecting rod (62), a limiting block (65) is mounted on the other end of the connecting rod (62), and a spring (64) sleeved on the outer surface of the connecting rod (62) is connected between the clamping plate (63) and the mounting plate (61).

5. The magnetic stirrer for biological experiments according to claim 1, characterized in that: The second lifting assembly (7) comprises an installation box (71) installed on one side of the magnetic base (1), a second screw rod (72) is vertically rotatably provided in the installation box (71), and the second screw rod (72) passes through the top of the installation box (71) and extends out of the installation box (71), a second bevel gear (76) is installed on the second screw rod (72) and is located in the installation box (71), a first rotating shaft (74) is rotatably provided on one side of the installation box (71), one end of the first rotating shaft (74) extends into the installation box (71) and is installed with a first bevel gear (73), the other end of the first rotating shaft (74) is connected to a third hand wheel (75), the first bevel gear (73) and the second bevel gear (76) are meshed with each other, and a second threaded block (77) is threadedly connected to the portion of the second screw rod (72) extending out of the installation box (71), and a transverse plate (8) is installed on the second threaded block (77).

6. The magnetic stirrer for biological experiments according to claim 5, characterized in that: The stirring assembly (9) comprises a micro motor (91) mounted on the top of the horizontal plate (8); a second rotating shaft (92) is connected to the output end of the micro motor (91); a plurality of stirring blades (93) are mounted on the bottom of the second rotating shaft (92); and a cover plate (10) is slidably mounted on the second rotating shaft (92).

7. The magnetic stirrer for biological experiments according to claim 6, characterized in that: A groove (13) is provided at the bottom of the cover plate (10), a fixing plate (14) is installed on the second rotating shaft (92), a convex block (15) is provided on the top of the fixing plate (14), and the convex block (15) can be moved out of or into the groove (13).

8. The magnetic stirrer for biological experiments according to claim 7, characterized in that: A temperature sensor (12) is installed on one side of the cover plate (10), and an exhaust port (16) is provided on the other side of the cover plate (10).

9. The magnetic stirrer for biological experiments according to claim 4, characterized in that: A third guide rod (66) is installed on one side of the clamping plate (63) close to the mounting plate (61), and one end of the third guide rod (66) away from the clamping plate (63) passes through the mounting plate (61).

10. The magnetic stirrer for biological experiments according to claim 5, characterized in that: A fourth guide rod (78) is vertically arranged on the top of the installation box (71), and the fourth guide rod (78) penetrates the second threaded block (77) and is slidably connected to the second threaded block (77).

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