Digital display constant-temperature magnetic stirrer for experiment

Abstract

The utility model relates to the field of magnetic stirrers, in particular to an experimental digital display constant-temperature magnetic stirrer, which adopts the technical scheme that the experimental digital display constant-temperature magnetic stirrer comprises a shell, a heat conducting disc is fixedly mounted on the top surface of the shell, a beaker is placed on the top surface of the heat conducting disc, magnetons are placed in the beaker, and a flat plate is arranged on the inner wall of the shell under the heat conducting disc. A U-shaped rotating rod is rotatably installed on the top face of the flat plate, first magnets are fixedly installed at the two ends of the U-shaped rotating rod, hydraulic rods are fixedly installed on the two sides of the top face of the middle of the U-shaped rotating rod, second magnets are fixedly installed at the upper ends of the hydraulic rods, and the second magnets and magnetons repel each other. The device has the beneficial effects that the hydraulic rod pushes the second magnet to be close to the magneton, so that the magneton is repelled and suspended in the beaker, the effects of preventing the magneton from rubbing the bottom of a container during rotation and preventing the bottom of the container or the magneton from being abraded are achieved, the condition that small particles fall off to pollute a sample is completely eradicated, and the service life of the beaker is prolonged. And the service life of the magneton is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of magnetic stirrers, in particular to a digital display constant temperature magnetic stirrer for experiments. Background Art

[0002] The digital display constant temperature magnetic stirrer is a commonly used laboratory equipment. It combines the magnetic stirrer and constant temperature functions. It uses the magnetic principle to stir the solution or mix the sample at the bottom of the container by rotating the magnet to achieve uniform mixing of the solution or dissolution reaction. The device has a built-in constant temperature system that can accurately control the temperature around the stirrer and provide a constant temperature environment. It is an efficient, accurate and safe laboratory equipment.

[0003] The prior art has the following deficiencies: the stirring magnet of a traditional constant temperature magnetic stirrer is usually adsorbed on the bottom of the container by magnetic force. During the stirring process, the magnet will be rotated to produce a stirring effect. However, during the continuous rotation of the magnet, it will continuously rub the bottom of the container. Long-term friction may cause wear on the bottom of the container or the magnet itself, which may cause tiny particles to fall off and contaminate the sample, and may also affect the cleanliness of the container and the effectiveness of the magnet. In addition, friction may also cause local temperature rise, which may affect the constant temperature system's measurement data of the temperature in the container, resulting in low control accuracy of the temperature environment in the container.

[0004] Therefore, it is necessary to invent a digital display constant temperature magnetic stirrer for experiment. Utility Model Content

[0005] To this end, the utility model provides a digital display constant temperature magnetic stirrer for experiments, wherein a solution is poured into a beaker, a U-shaped rotating rod is driven to rotate and drive a first magnet to attract a magnetic particle to rotate, the magnetic particle rotates to stir the solution in the beaker, and a second magnet is pushed close to the magnetic particle by a hydraulic rod, so that the magnetic particle is repelled and suspended in the beaker, so as to solve the problem that a traditional constant temperature magnetic stirrer continuously rubs the bottom of a container during the continuous rotation of the magnetic particle, and long-term friction may cause wear to the bottom of the container or the magnetic particle itself, which may cause tiny particles to fall off and contaminate the sample, and may also affect the cleanliness of the container and the effectiveness of the magnetic particle. In addition, friction may also cause local temperature rise, which may affect the measurement data of the temperature in the container by the constant temperature system, resulting in low control accuracy of the temperature environment in the container.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: an experimental digital display constant temperature magnetic stirrer, comprising a shell, a heat conduction plate fixedly installed on the top surface of the shell, a beaker placed on the top surface of the heat conduction plate, a magnet placed in the beaker, a temperature measuring device fixedly installed at a corner of the top surface of the shell, a flat plate is provided on the inner wall of the shell just below the heat conduction plate, a U-shaped rotating rod is rotatably installed on the top surface of the flat plate, first magnets are fixedly installed at both ends of the U-shaped rotating rod, and the first magnet can attract the magnet to rotate when the U-shaped rotating rod rotates, hydraulic rods are fixedly installed on both sides of the top surface of the middle part of the U-shaped rotating rod, and second magnets are fixedly installed on the upper end of the hydraulic rod, and the second magnet and the magnet repel each other.

[0007] Preferably, support rods are fixedly mounted at the four corners of the bottom surface of the flat plate, the lower ends of the support rods are fixedly mounted on the bottom surface of the inner wall of the shell, and the flat plate is fixedly mounted on the bottom surface of the inner wall of the shell directly below the heat conducting plate through the support rods.

[0008] Preferably, a motor is fixedly mounted in the center of the bottom surface of the flat plate, and the motor and the upper output end penetrate the bottom surface of the flat plate and are fixedly connected to the middle part of the U-shaped rotating rod.

[0009] Preferably, the second magnet is annular in structure, the hydraulic rod can push the second magnet to move vertically, and when the second magnet is close to the heat-conducting plate, it can repel the magnets and make them suspend in the beaker.

[0010] Preferably, an annular groove is provided at the bottom of the heat-conducting plate, and a heating wire is embedded and installed in the annular groove at the bottom of the heat-conducting plate.

[0011] Preferably, the temperature measuring device includes a bracket, which is L-shaped and fixedly mounted on a corner of the top surface of the shell. A temperature measuring rod is inserted into the end of the bracket away from the shell, and one end of the temperature measuring rod extends into the inner wall of the beaker.

[0012] Preferably, a numerical control panel is inserted and installed on one side of the outer wall of the shell, the end of the temperature measuring rod away from the beaker is connected to a wire, the end of the wire away from the temperature measuring rod is inserted into the inner wall of the shell and connected to the numerical control panel, and the numerical control panel can display the temperature data measured by the temperature measuring rod.

[0013] Preferably, a switch and a knob are installed on one side of the outer wall of the shell having a numerical control panel, the knob passes through the shell on the side close to the outer wall of the shell, the knob is inserted into the side of the shell and is electrically connected to the motor through a wire, and the motor speed can be adjusted by rotating the knob.

[0014] The beneficial effects of the utility model are as follows: a solution is poured into a beaker, the U-shaped rotating rod is driven to rotate and drive the first magnet to attract the magnetic particle to rotate, the magnetic particle rotates to stir the solution in the beaker, and the second magnet is pushed close to the magnetic particle by the hydraulic rod, so that the magnetic particle is repelled and suspended in the beaker, so as to prevent the magnetic particle from rubbing against the bottom of the container when rotating, avoid wear on the bottom of the container or the magnetic particle itself, prevent the situation where tiny particles fall off and cause sample contamination, extend the service life of the magnetic particle, avoid local temperature increase caused by friction, and improve the control accuracy of the constant temperature system on the temperature environment in the container. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A front view of a digital display constant temperature magnetic stirrer for experiments provided by the utility model;

[0016] Figure 2 A cross-sectional view of a digital display constant temperature magnetic stirrer for experiments provided by the utility model;

[0017] Figure 3 A schematic diagram of the structure of a driving device of a digital display constant temperature magnetic stirrer for experiments provided by the utility model;

[0018] Figure 4 A cross-sectional view of a heat-conducting plate of a digital display constant temperature magnetic stirrer for experiments provided by the utility model;

[0019] Figure 5 The utility model provides a top view of the interior of a shell of a digital display constant temperature magnetic stirrer for experiments.

[0020] In the figure: housing 11, heat conducting plate 12, beaker 13, CNC panel 14, switch 15, knob 16, magnet 17, temperature measuring bracket 18, temperature measuring rod 19, wire 20, heating wire 21, plate 22, support rod 23, motor 24, U-shaped rotating rod 25, first magnet 26, hydraulic rod 27, second magnet 28. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0022] Example 1

[0023] like Figure 1-Figure 3As shown, an experimental digital display constant temperature magnetic stirrer in the embodiment of the first aspect of the utility model comprises a shell 11, a heat conducting plate 12 is fixedly mounted on the top surface of the shell 11, a beaker 13 is placed on the top surface of the heat conducting plate 12, a magnet 17 is placed in the beaker 13, a temperature measuring device is fixedly mounted on a corner of the top surface of the shell 11, a flat plate 22 is provided on the inner wall of the shell 11 just below the heat conducting plate 12, a U-shaped rotating rod 25 is rotatably mounted on the top surface of the flat plate 22, first magnets 26 are fixedly mounted at both ends of the U-shaped rotating rod 25, and the first magnet 26 can attract the magnet 17 to rotate when the U-shaped rotating rod 25 rotates, hydraulic rods 27 are fixedly mounted on both sides of the top surface of the middle part of the U-shaped rotating rod 25, and second magnets 28 are fixedly mounted on the upper end of the hydraulic rod 27, and the second magnets 28 and the magnet 17 repel each other.

[0024] In the above embodiment, it should be noted that the heat conducting plate 12 is made of a metal that is not attracted by magnets and has good thermal conductivity, the beaker 13 is a glass beaker, the solution is poured into the beaker 13, the U-shaped rotating rod 25 is driven to rotate and drive the first magnet 26 to attract the magnet 17 to rotate, the magnet 17 rotates and stirs the solution in the beaker 13, and the second magnet 28 is pushed close to the magnet 17 by the hydraulic rod 27, so that the magnet 17 is repelled and suspended in the beaker 13, so as to prevent the magnet 17 from rubbing against the bottom of the beaker 13 when rotating, and avoid wear on the beaker 13 or the magnet 17 itself, thereby preventing the falling of tiny particles from causing sample contamination, extending the service life of the magnet 17, and avoiding local temperature increase caused by friction, thereby improving the control accuracy of the temperature measuring device over the temperature environment in the container.

[0025] Example 2

[0026] like Figure 1-Figure 3 As shown, an experimental digital display constant temperature magnetic stirrer includes all the contents of Example 1, in addition, support rods 23 are fixedly installed at the four corners of the bottom surface of the flat plate 22, the lower ends of the support rods 23 are fixedly installed on the bottom surface of the inner wall of the shell 11, the flat plate 22 is fixedly installed on the bottom surface of the inner wall of the shell 11 directly below the heat conducting plate 12 through the support rods 23, a motor 24 is fixedly installed at the center of the bottom surface of the flat plate 22, the upper output end of the motor 24 passes through the bottom surface of the flat plate 22 and is fixedly connected to the middle part of the U-shaped rotating rod 25, the second magnet 28 is annular in structure, the hydraulic rod 27 can push the second magnet 28 to move vertically, and when the second magnet 28 is close to the heat conducting plate 12, it can repel the magnet 17 to make it suspended in the beaker 13.

[0027] In the above embodiment, it should be noted that the U-shaped rotating rod 25 is driven to rotate by starting the motor 24 to drive the first magnet 26 to attract the magnet 17 to rotate, and the height of the second magnet 28 is adjusted by the hydraulic rod 27, so that the height of the magnet 17 suspended in the beaker 13 can be adjusted.

[0028] Example 3

[0029] like Figure 1 , Figure 2 and Figure 4 As shown, an experimental digital display constant temperature magnetic stirrer includes all the contents of Example 2. In addition, an annular groove is provided at the bottom of the heat conducting plate 12, and a heating wire 21 is embedded and installed in the annular groove at the bottom of the heat conducting plate 12. The temperature measuring device includes a bracket 18, and the bracket 18 is L-shaped. The bracket 18 is fixedly installed at a corner of the top surface of the shell 11, and a temperature measuring rod 19 is inserted and installed at one end of the bracket 18 away from the shell 11, and one end of the temperature measuring rod 19 extends into the inner wall of the beaker 13.

[0030] In the above embodiment, it should be noted that the bracket 18 is an adjustable bracket, and the bracket 18 can fix and adjust the position of the temperature measuring rod 19 so that the temperature measuring end of the temperature measuring rod 19 extends into the beaker 13, and the temperature in the beaker 13 is measured by the temperature measuring rod 19. If the temperature in the beaker 13 is low, the heat is conducted to the beaker 13 through the heat conducting plate 12 by energizing the heating wire 21 to generate heat, and the beaker is heated to achieve the effect of maintaining a constant temperature in the beaker 13.

[0031] Example 4

[0032] like Figure 4 and Figure 5 As shown, an experimental digital display constant temperature magnetic stirrer includes all the contents of Example 3. In addition, a numerical control panel 14 is inserted and installed on one side of the outer wall of the shell 11, and the end of the temperature measuring rod 19 away from the beaker 13 is connected to the wire 20, and the end of the wire 20 away from the temperature measuring rod 19 is inserted into the inner wall of the shell 11 and connected to the numerical control panel 14. The numerical control panel 14 can display the temperature data measured by the temperature measuring rod 19. A switch 15 and a knob 16 are installed on one side of the outer wall of the shell 11 where the numerical control panel 14 is provided. The side of the knob 16 close to the outer wall of the shell 11 passes through the shell 11, and the side of the knob 16 inserted into the shell 11 is electrically connected to the motor 24 through a wire, and the rotation speed of the motor 24 can be adjusted by rotating the knob 16.

[0033] In the above embodiment, it should be noted that the numerical control panel 14 is connected to the temperature measuring rod 19 through the wire 20, and the temperature data measured by the temperature measuring rod 19 can be displayed on the numerical control panel 14. At the same time, the numerical control panel 14 is also electrically connected to the heating wire 21 and the hydraulic rod 27. The numerical control panel 14 can control the heating wire 21 to adjust the heating temperature of the heating wire 21, and can also control the extension length of the hydraulic rod 27. The knob 16 is connected to the motor 24, and the speed of the motor 24 is adjusted by rotating the knob 16. The switch 15 is connected to the power supply, and the power supply connected to the entire utility model can be turned off or on through the switch 15 to ensure the normal operation of the utility model.

[0034] The use process of the utility model is as follows: a technician in this field starts the switch 15, places the beaker 13 on the heat-conducting plate 12 and pours the solution into it, adjusts the bracket 18, and makes the temperature measuring end of the temperature measuring rod 19 extend into the beaker 13, and measures the temperature in the beaker 13 through the temperature measuring rod 19. If the temperature in the beaker 13 is low, the heat is transferred to the beaker 13 through the heat-conducting plate 12 by energizing the heating wire 21 to generate heat, and the beaker is heated to keep the temperature in the beaker 13 constant. Then the motor 24 is started to drive the U-shaped rotating rod 25 to rotate, driving the first magnet 26 to attract the magnet 17 to rotate, and the magnet 17 rotates to stir the solution in the beaker 13, and at the same time the hydraulic rod 27 is started to push the second magnet 28 close to the magnet 17, so that the magnet 17 is repelled and suspended in the beaker 13 to complete the stirring work.

[0035] The above is only a preferred embodiment of the utility model. Any person skilled in the art may modify the utility model by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement based on the technical solution of the utility model shall fall within the scope of protection claimed by the utility model.

Claims

1. An experimental digital display constant temperature magnetic stirrer, comprising a shell (11), a heat conducting plate (12) fixedly mounted on the top surface of the shell (11), a beaker (13) placed on the top surface of the heat conducting plate (12), a magnet (17) placed in the beaker (13), a temperature measuring device fixedly mounted on a corner of the top surface of the shell (11), characterized in that: A flat plate (22) is arranged on the inner wall of the shell (11) directly below the heat conducting plate (12); a U-shaped rotating rod (25) is rotatably mounted on the top surface of the flat plate (22); first magnets (26) are fixedly mounted on both ends of the U-shaped rotating rod (25); when the U-shaped rotating rod (25) rotates, the first magnets (26) can attract the magnet (17) to rotate; hydraulic rods (27) are fixedly mounted on both sides of the top surface of the middle part of the U-shaped rotating rod (25); a second magnet (28) is fixedly mounted on the upper end of the hydraulic rod (27); the second magnet (28) and the magnet (17) repel each other.

2. The digital constant temperature magnetic stirrer for experiments according to claim 1, characterized in that: Support rods (23) are fixedly mounted at the four corners of the bottom surface of the flat plate (22), the lower ends of the support rods (23) are fixedly mounted on the bottom surface of the inner wall of the shell (11), and the flat plate (22) is fixedly mounted on the bottom surface of the inner wall of the shell (11) directly below the heat conducting plate (12) via the support rods (23).

3. The digital display constant temperature magnetic stirrer for experiments according to claim 1, characterized in that: A motor (24) is fixedly mounted in the center of the bottom surface of the plate (22); the motor (24) and the upper output end penetrate the bottom surface of the plate (22) and are fixedly connected to the middle of the U-shaped rotating rod (25).

4. The digital display constant temperature magnetic stirrer for experiments according to claim 1, characterized in that: The second magnet (28) is annular in structure, and the hydraulic rod (27) can push the second magnet (28) to move vertically. When the second magnet (28) is close to the heat conducting plate (12), it can repel the magnet (17) and make it suspend in the beaker (13).

5. The digital constant temperature magnetic stirrer for experiments according to claim 1, characterized in that: An annular groove is provided at the bottom of the heat conducting plate (12), and an electric heating wire (21) is embedded and installed in the annular groove at the bottom of the heat conducting plate (12).

6. The digital constant temperature magnetic stirrer for experiments according to claim 1, characterized in that: The temperature measuring device comprises a bracket (18), the bracket (18) is L-shaped, the bracket (18) is fixedly mounted on a corner of the top surface of the shell (11), and a temperature measuring rod (19) is inserted and mounted on one end of the bracket (18) away from the shell (11), and one end of the temperature measuring rod (19) extends into the inner wall of the beaker (13).

7. The digital constant temperature magnetic stirrer for experiments according to claim 6, characterized in that: A numerical control panel (14) is inserted and installed on one side of the outer wall of the shell (11); one end of the temperature measuring rod (19) away from the beaker (13) is connected to a wire (20); one end of the wire (20) away from the temperature measuring rod (19) is inserted into the inner wall of the shell (11) and connected to the numerical control panel (14); the numerical control panel (14) can display temperature data measured by the temperature measuring rod (19).

8. The digital display constant temperature magnetic stirrer for experiments according to claim 3, characterized in that: The outer wall of the shell (11) is provided with a switch (15) and a knob (16) installed on one side of a numerical control panel (14); the knob (16) passes through the shell (11) on the side close to the outer wall of the shell (11); the knob (16) is inserted into the side of the shell (11) and is electrically connected to the motor (24) via a wire; the rotation speed of the motor (24) can be adjusted by rotating the knob (16).

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