Miniature electrolysis device for electrochemical experiment

Abstract

The utility model provides a miniature electrolysis device for an electrochemical experiment. The miniature electrolysis device comprises an electrolytic tank cover, an electrolytic tank body, magnetons, a damping table and a magnetic stirrer, the electrolytic tank cover is detachably arranged on the opening side of the electrolytic tank body; a pipetting muzzle is arranged on the electrolytic tank cover; a convex part is arranged at the bottom of the electrolytic tank body; the magneton is movably arranged in the protruding part; the damping table is arranged on the bearing surface of the magnetic stirrer, and a sunken embedding opening matched with the convex part is formed in the damping table; the electrolytic tank body is arranged on the damping table, and the protruding part is embedded into the embedding opening, so that the technical scheme of the miniature electrolytic tank which can eliminate mechanical vibration caused by magnetic stirring to the greatest extent and can prevent the magneton from colliding with the electrode in the rotating process is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of electrochemical experiments, in particular to a micro electrolysis device used for electrochemical experiments. Background Art

[0002] An electrolytic cell is an electrochemical device whose core function is to pass an electric current through an electrolyte solution or molten electrolyte through an external power source, thereby causing a redox reaction at the cathode and anode. This process realizes the conversion and utilization of electrical energy, allowing redox reactions that would not otherwise occur spontaneously to proceed. The electrolytic cell consists of an external power source, an electrolyte solution, and cathode and anode electrodes, among which a DC power source provides the required electrical energy, and the cathode and anode electrodes promote the occurrence of oxidation and reduction reactions, respectively.

[0003] Electrolytic cells are widely used in teaching and industrial fields. Existing electrolytic cells can complete time-current tests, but they have the following shortcomings: 1. The experimental process of the time-current curve method is easily disturbed by the external environment, especially the mechanical vibration during the magnetic stirring process, which will cause disturbances in the current signal; 2. During the mechanical stirring process, due to the different relative positions of the electrolytic cell on the magnetic stirrer, the stirrer is easy to move around, the speed is difficult to control, and it is easy to collide with the electrode, causing current signal disturbances; 3. Conventional electrolytic cells usually only limit the depth of the three electrodes immersed in the electrolyte, but the depth of the pipette gun immersion will also cause different current steps. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a micro electrolysis device for electrochemical experiments.

[0005] The utility model provides a micro electrolysis device for electrochemical experiments, comprising: an electrolysis cell cover, an electrolysis cell body, a magnet, a shock-absorbing platform, and a magnetic stirrer;

[0006] The electrolytic cell cover is detachably arranged on the opening side of the electrolytic cell body;

[0007] The electrolytic cell cover is provided with a pipette nozzle;

[0008] The bottom of the electrolytic cell body is provided with a protrusion;

[0009] The magnetic sub-activity is arranged in the protrusion;

[0010] The vibration-damping platform is arranged on the bearing surface of the magnetic stirrer, and a concave fitting opening matching with the protruding portion is arranged on the vibration-damping platform;

[0011] The electrolytic cell body is placed on the vibration-absorbing platform, and the protruding portion is embedded in the fitting opening.

[0012] In a possible implementation, the electrolytic cell cover is further provided with a working electrode port, an auxiliary electrode port, and a reference electrode port.

[0013] In a possible implementation, an anti-slip layer is provided on the shock-absorbing platform;

[0014] The anti-slip layer is provided with an opening for the protrusion to pass through;

[0015] The anti-slip layer is in contact with at least the bottom of the electrolytic cell body at a position other than the protruding portion.

[0016] In a possible implementation, a digital display screen is also provided on the vibration-absorbing platform;

[0017] The digital display screen is electrically connected to a control circuit module in the magnetic stirrer.

[0018] In a possible implementation, the digital display screen is a 4-digit LED digital tube.

[0019] In a possible implementation, the control circuit module includes a processor, a first Hall sensor, and a second Hall sensor;

[0020] The digital display screen, the first Hall sensor, and the second Hall sensor are electrically connected to the processor respectively.

[0021] In a possible implementation manner, a filter circuit is electrically connected between the first Hall sensor, the second Hall sensor, and the processor.

[0022] In a possible implementation, the first Hall sensor and the second Hall sensor are installed and fixed in the magnetic stirrer at an electrical angle of 90 degrees.

[0023] In a possible implementation, a temperature sensor is also included;

[0024] The temperature sensor is electrically connected to the processor;

[0025] The temperature sensor is arranged in the magnetic stirrer and close to the bottom of the electrolytic cell body.

[0026] In a possible implementation, a rubber support portion is provided at the bottom of the magnetic stirrer.

[0027] The technical solution provided by the utility model has at least the following beneficial effects:

[0028] By adding a shock-absorbing table, the mechanical vibration caused by magnetic stirring is weakened, which helps to maintain the stability of the response current; by designing a sinking limit for the stirring bar, i.e., the magnetic bar, the current disturbance caused by the stirring bar is avoided; and by adding a pipette nozzle to limit the pipette tip, the immersion depth of the pipette tip in the electrolyte can be controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic cross-sectional structure diagram of a micro electrolysis device for electrochemical experiments provided by an embodiment of the utility model;

[0030] Figure 2 A top view of an electrolytic cell body provided in an embodiment of the utility model;

[0031] Figure 3 A top view of an electrolytic cell cover provided in an embodiment of the utility model;

[0032] Figure 4 A top view of the vibration-absorbing platform and the magnetic stirrer provided in the embodiment of the utility model when combined;

[0033] Figure 5 A circuit schematic diagram including a processor and its peripheral circuits provided for an embodiment of the utility model;

[0034] Figure 6 A schematic diagram of a circuit including a Hall sensor provided in an embodiment of the utility model;

[0035] Figure 7 A circuit schematic diagram for connecting a digital display screen provided in an embodiment of the utility model;

[0036] Figure 8 A circuit schematic diagram including a temperature sensor provided in an embodiment of the utility model;

[0037] In the attached drawings, 10, electrolytic cell cover; 11, electrolytic cell body; 12, magnet; 13, shock absorbing table; 14, magnetic stirrer; 101, pipette nozzle; 102, working electrode port; 103, auxiliary electrode port; 104, reference electrode port; 111, protrusion; 131, fitting port; 132, anti-slip layer; 133, digital display screen; 141, rubber support. DETAILED DESCRIPTION

[0038] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the protection scope of the present invention.

[0039] Please refer to Figures 1 to 4The utility model provides a micro electrolysis device for electrochemical experiments, comprising: an electrolytic cell cover 10, an electrolytic cell body 11, a magnet 12, a shock absorbing platform 13, and a magnetic stirrer 14;

[0040] The electrolytic cell cover 10 is detachably disposed on the opening side of the electrolytic cell body 11;

[0041] The electrolytic cell cover 10 is provided with a pipette nozzle 101;

[0042] The bottom of the electrolytic cell body 11 is provided with a protrusion 111;

[0043] The magnet 12 is movably disposed in the protruding portion 111;

[0044] The damping platform 13 is disposed on the bearing surface of the magnetic stirrer 14 , and a recessed fitting opening 131 matching the protruding portion 111 is disposed on the damping platform 13 ;

[0045] The electrolytic cell body 11 is placed on the vibration-absorbing platform 13 , and the protruding portion 111 is embedded in the fitting opening 131 .

[0046] In the present embodiment, the electrolytic cell cover 10 is provided with a pipette nozzle 101, and the rest are all of conventional design. The pipette nozzle 101 can control the size of the opening according to actual needs, and according to the insertion depth of the pipette gun head, a limiting ring of different sizes is configured on the pipette nozzle 101 to adjust the socket size of the pipette nozzle 101. The bottom center of the electrolytic cell body 11 is designed with a protrusion 111 protruding downward, and the rest are all of conventional design. The protrusion 111 can be designed as a cylindrical shape, and the specific size can be determined according to the magnet 12 and the actual experimental needs. The bottom center of the electrolytic cell body 11 is designed to be convex downward, which avoids the large change of the position of the small magnet during the rotation process, and can effectively avoid collision with the electrode. The magnet 12 adopts a conventional design. The damping table 13 can be a table top of a certain thickness made of a damping material, such as a rubber material, which can eliminate the mechanical vibration caused by magnetic stirring to the greatest extent. The center of the vibration-absorbing platform 13 is concave, and the fitting opening 131 matches the protruding bottom of the electrolytic cell body 11, namely the protruding portion 111. The magnetic stirrer 14 can be of conventional design.

[0047] In a specific embodiment, the operation process of the micro-electrolysis device is as follows:

[0048] Step 1, placing the stirring bar (magnetic bar 12) at the lower convex part (protruding part 111) of the bottom of the electrolytic cell (electrolytic cell body 11);

[0049] Step 2, combine the lower convex part of the electrolytic cell with the concave part (fitting opening 131) of the damping platform 13, and place them on the magnetic stirrer 14;

[0050] Step 3, injecting an appropriate amount of electrolyte solution into the electrolytic cell;

[0051] Step 4, sequentially fix the working electrode, the auxiliary electrode, and the reference electrode on the electrolytic cell cover 10, and cover the electrolytic cell;

[0052] Step 5: Start the electrochemical workstation and connect the test software;

[0053] Step 6, start the magnetic stirrer 14 and adjust the rotation speed;

[0054] Step 7, adjusting the socket size of the pipette nozzle 101 to control the immersion depth of the pipette tip each time;

[0055] Step 8. Complete the test.

[0056] In one possible implementation, Figure 3 The electrolytic cell cover 10 is also provided with a working electrode port 102 , an auxiliary electrode port 103 , and a reference electrode port 104 .

[0057] In this embodiment, the working electrode port 102, the auxiliary electrode port 103, and the reference electrode port 104 are all of conventional design. The working electrode port 102 is used to fix the working electrode, the auxiliary electrode port 103 is used to fix the auxiliary electrode, and the reference electrode port 104 is used to fix the reference electrode.

[0058] In one possible implementation, Figure 4 , the shock absorbing platform 13 is provided with an anti-slip layer 132;

[0059] The anti-slip layer 132 is provided with an opening for the protrusion 111 to pass through;

[0060] The anti-slip layer 132 at least contacts the bottom of the electrolytic cell body 11 at a position other than the protruding portion 111 .

[0061] In this embodiment, the anti-skid layer 132 is used to increase the friction force at the bottom of the electrolytic cell body 11 and reduce the interaction force between the side wall of the protrusion 111 and the side wall of the fitting opening 131 of the damping platform 13 during magnetic stirring.

[0062] In a possible implementation, a digital display screen 133 is also provided on the vibration reduction platform 13;

[0063] The digital display screen 133 is electrically connected to the control circuit module in the magnetic stirrer 14 .

[0064] In this embodiment, a wiring port can be provided on the digital display screen 133, and the digital display screen 133 is connected to the control circuit module by a plug-in connection line. The digital display screen 133 can also be connected to the vibration reduction platform 13 in a snap-fit ​​manner. In this case, the digital display screen 133 can be connected to the control circuit module in a plug-in manner or in a fixed connection manner. The digital display screen 133 can be used to display the rotation speed of the magnetic stirrer 14.

[0065] In a possible implementation, the digital display screen 133 is a 4-digit LED digital tube.

[0066] In this embodiment, the LED digital tube adopts a conventional design, and a 4-bit white common anode LED digital tube can be used, and the display content is controlled by the control circuit module.

[0067] In one possible implementation, Figures 5 to 7 , the control circuit module includes a processor U1, a first Hall sensor U3, and a second Hall sensor U4;

[0068] The digital display screen 133 , the first Hall sensor U3 , and the second Hall sensor U4 are electrically connected to the processor U1 , respectively.

[0069] In this embodiment, the processor U1 can adopt an STM series single-chip microcomputer, and a conventional power supply circuit and reset circuit are set during specific operation. The power supply circuit may include a voltage change circuit, which can be powered by a button battery. The first Hall sensor U3 and the second Hall sensor U4 are connected to the processor U1 in a conventional manner. The first Hall sensor U3 and the second Hall sensor U4 can adopt a 41F type Hall, that is, a bipolar latch type Hall. The digital display screen 133 can be connected to the processor U1 through the display interface P1.

[0070] In a possible implementation, a filter circuit is electrically connected between the first Hall sensor U3 , the second Hall sensor U4 , and the processor U1 .

[0071] In this embodiment, resistors R11, R12, R13, and capacitor C16 together constitute a filter circuit for filtering signal interference on the transmission line of the first Hall sensor U3. Resistors R14, R15, R16, and capacitor C17 together constitute a filter circuit for filtering signal interference on the transmission line of the second Hall sensor U4. The first Hall sensor U3 and the second Hall sensor U4 output AB phase orthogonal pulse signals, which are then sent to the processor U1 (STM32 single chip microcomputer) through the PA6 and PA7 pins, and the processor U1 performs speed calculation according to the timer.

[0072] In a possible implementation, the first Hall sensor U3 and the second Hall sensor U4 are installed and fixed in the magnetic stirrer 14 at an electrical angle of 90 degrees.

[0073] In this embodiment, the first Hall sensor U3 and the second Hall sensor U4 are arranged in the same horizontal plane, and in the horizontal plane, the angle between the center line of the first Hall sensor U3 to the protruding portion 111 and the center line of the second Hall sensor U4 to the protruding portion 111 is 90 degrees. After the two Hall sensors are fixed at an electrical angle of 90 degrees, they can output AB phase orthogonal pulse signals.

[0074] In one possible implementation, Figure 8 , and also includes a temperature sensor U2;

[0075] The temperature sensor U2 is electrically connected to the processor U1;

[0076] The temperature sensor U2 is disposed in the magnetic stirrer 14 and is disposed close to the bottom of the electrolytic cell body 11 .

[0077] In this embodiment, the temperature sensor U2 may be a precision analog temperature sensor, such as LMT70. In specific implementation, the TAO pin of the temperature sensor U2 is connected to the ADC of the processor U1 through the PA5 pin for temperature conversion.

[0078] In a possible implementation, a rubber support portion 141 is provided at the bottom of the magnetic stirrer 14 .

[0079] In this embodiment, the rubber supporting portion 141 is made of rubber material.

[0080] The above embodiments should not limit the present invention in any way, and any technical solutions obtained by equivalent replacement or equivalent conversion shall fall within the protection scope of the present invention.

Claims

1. A micro electrolysis device for electrochemical experiments, characterized in that: include: Electrolytic cell cover, electrolytic cell body, magnet, shock absorbing table, magnetic stirrer; The electrolytic cell cover is detachably arranged on the opening side of the electrolytic cell body; The electrolytic cell cover is provided with a pipette nozzle; The bottom of the electrolytic cell body is provided with a protrusion; The magnetic sub-activity is arranged in the protrusion; The vibration-damping platform is arranged on the bearing surface of the magnetic stirrer, and a concave fitting opening matching with the protruding portion is arranged on the vibration-damping platform; The electrolytic cell body is placed on the vibration-absorbing platform, and the protruding portion is embedded in the fitting opening.

2. The micro electrolysis device according to claim 1, characterized in that: The electrolytic cell cover is also provided with a working electrode port, an auxiliary electrode port and a reference electrode port.

3. The micro electrolysis device according to claim 1, characterized in that: The shock-absorbing platform is provided with an anti-slip layer; The anti-slip layer is provided with an opening for the protrusion to pass through; The anti-slip layer is in contact with at least the bottom of the electrolytic cell body at a position other than the protruding portion.

4. The micro electrolysis device according to claim 1, characterized in that: The shock absorbing platform is also provided with a digital display screen; The digital display screen is electrically connected to a control circuit module in the magnetic stirrer.

5. The micro-electrolysis device according to claim 4, characterized in that: The digital display screen is a 4-digit LED digital tube.

6. The micro-electrolysis device according to claim 4, characterized in that: The control circuit module includes a processor, a first Hall sensor, and a second Hall sensor; The digital display screen, the first Hall sensor, and the second Hall sensor are electrically connected to the processor respectively.

7. The micro-electrolysis device according to claim 6, characterized in that: A filter circuit is electrically connected between the first Hall sensor, the second Hall sensor and the processor.

8. The micro electrolysis device according to claim 6, characterized in that: The first Hall sensor and the second Hall sensor are installed and fixed in the magnetic stirrer at an electrical angle of 90 degrees.

9. The micro-electrolysis device according to claim 6, characterized in that: Also includes a temperature sensor; The temperature sensor is electrically connected to the processor; The temperature sensor is arranged in the magnetic stirrer and close to the bottom of the electrolytic cell body.

10. The micro electrolysis device according to claim 1, characterized in that: A rubber supporting part is arranged at the bottom of the magnetic stirrer.

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