Temperature-control stirring photosensitive timing device
Through the design of the temperature-controlled stirring photosensitive timing device, the color change of the reaction liquid is automatically monitored by fill lights and photosensitive sensors, which solves the problem of inaccurate timing caused by misjudgment by experimenters, and improves the accuracy and simplicity of chemical reaction rate experiments. .
Patent Information
- Application Number
- CN202411331975.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2024-12-27
AI Technical Summary
In the chemical reaction rate experiment, the experimenters' misjudgment of the color change of the reaction liquid caused inaccurate timing, which increased the problem of experimental error and insufficient contrast.
A temperature-controlled stirring photosensitive timing device is designed, including an experimental bracket, a control box and a magnetic stirrer. The color changes of the reaction liquid are automatically monitored by filling lights and photosensitive sensors, and timed through timers and indicator lights, simplifying experimental operations. .
It achieves high accuracy of chemical reaction rate experiments, reduces experimental errors, and simplifies operation steps.
Smart Images
Figure CN119186341A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of chemical experimental instruments, in particular to a temperature-controlled stirring photosensitivity timing device. Background Art
[0002] The rate of a chemical reaction indicates how fast a chemical reaction proceeds. The rate of a chemical reaction is related to the properties and concentration of the reactants, temperature, pressure, catalyst, etc. The chemical reaction rate experiment is an important means to study the degree of material transformation during a chemical reaction. It is an experiment that must be done in chemistry teaching. Different experimental methods such as the gradual addition method and the color change method are used to obtain data on the reaction rate. In the past, when doing this experiment, two experimenters were required to cooperate with each other, one was responsible for adding the reaction solution, and the other was responsible for starting the timing and observing the color change of the reaction solution and terminating the timing. Due to the error in the experimenter's judgment of the end point of the color change, the timing is prone to a time difference in the chemical reaction, which increases the error of the chemical reaction rate experiment and forms a lack of contrast in the chemical reaction rate. Therefore, we want to design a device that can automatically monitor the color change of the reaction solution and perform timing. Summary of the invention
[0003] The object of the present invention is to provide a temperature-controlled stirring photosensitivity timing device to solve the problems raised in the above-mentioned background technology.
[0004] To achieve the above object, the present invention provides the following technical solutions:
[0005] A temperature-controlled stirring photosensitivity timing device comprises: an experimental support, a control box and a magnetic stirrer, wherein the experimental support is detachably mounted on the magnetic stirrer, the experimental support is a disc-shaped hollow support, the experimental support is provided with a reaction cup placement position and a solution cup placement position, the reaction cup placement position is arranged in the center of the experimental support and is coaxial with the experimental support, the solution cup placement position is eccentrically arranged with the experimental support, a first mounting portion and a second mounting portion are provided on the side wall of the reaction cup placement position, a fill light is installed in the first mounting portion, and a photosensor is installed in the second mounting portion; the control box is fixedly mounted on the experimental support, a control circuit board is installed in the control box, the fill light and the photosensor are connected to the control circuit board, and a timer, an indicator light, a photosensitivity threshold adjustment button and a reset button are installed on the surface of the control box.
[0006] As a further solution of the present invention: a clamping claw is fixedly installed below the experimental support, and the clamping claw can be fixedly buckled on the workbench of the magnetic stirrer.
[0007] As a further solution of the present invention: the reaction cup placement position and the solution cup placement position are cylinders that pass through from top to bottom, the reaction cup placement position is set according to the size of a 100ml beaker, and the solution cup placement position is set according to the size of a 50ml beaker.
[0008] As a further solution of the present invention: the reaction cup placement position, the solution cup placement position and the experimental support are fixed into an integrated structure.
[0009] As a further solution of the present invention: a fill light port is provided at a position corresponding to the first mounting portion on the inner side of the reaction cup placement position, and a detection port is provided at a position corresponding to the second mounting portion.
[0010] As a further solution of the present invention: three photosensitivity threshold adjustment buttons are provided, namely starch potassium iodide system, potassium permanganate system, and phenolphthalein system.
[0011] Compared with the prior art, the beneficial effects of the present invention are: the present invention can automatically monitor the color change of the reaction liquid and perform timing in the experiment, which solves the problem of experimental errors caused by the experimenter's misjudgment of the color change of the reaction liquid, improves the accuracy of the chemical reaction rate experiment, and simplifies the experimental operation steps. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention.
[0013] Figure 2 It is a side structural schematic diagram of the present invention.
[0014] Figure 3 The structure of the experimental support and control box of the present invention is shown in FIG. Figure 1 .
[0015] Figure 4 The structure of the experimental support and control box of the present invention is shown in FIG. Figure 2 .
[0016] Figure 5 It is a schematic diagram of the top view of the experimental bracket and the control box of the present invention.
[0017] Figure 6 It is a schematic diagram of the installation structure of the fill light and the photosensor of the present invention.
[0018] In the figure, 1. experimental bracket; 11. reaction cup placement position; 111. first installation part; 1111. fill light; 1112. fill light port; 112. second installation part; 1121. photosensor; 1122. detection port; 12. solution cup placement position; 13. claw; 2. control box; 21. timer; 22. indicator light; 23. photosensitivity threshold adjustment button; 24. reset button. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0020] See also Figure 1 to Figure 6 In an embodiment of the present invention, a temperature-controlled stirring photosensitivity timing device includes: an experimental bracket 1, a control box 2 and a magnetic stirrer 3. The experimental bracket 1 can be detachably mounted on the magnetic stirrer 3. A clamping claw 13 is fixedly mounted below the experimental bracket 1, and the clamping claw 13 can be fixedly buckled on the workbench 31 of the magnetic stirrer 3.
[0021] The experimental support 1 is a disc-shaped hollow support, and is provided with a reaction cup placement position 11 and a solution cup placement position 12. The reaction cup placement position 11 is arranged in the center of the experimental support 1 and is coaxially arranged with the experimental support 1. The solution cup placement position 12 is eccentrically arranged with the experimental support 1. The reaction cup placement position 11, the solution cup placement position 12 and the experimental support 1 are fixed to form an integrated structure.
[0022] The reaction cup placement position 11 and the solution cup placement position 12 are cylinders that are connected from top to bottom. The reaction cup placement position 11 is set according to the size of a 100ml beaker, and the solution cup placement position 12 is set according to the size of a 50ml beaker. The existing magnetic stirrer has two functions of stirring and heating. The reaction cup placement position 11 and the solution cup placement position 12 are set to facilitate the placement of two solutions for the experiment and to heat the solutions at the same time, which is beneficial to temperature control of the reaction solution.
[0023] A first mounting portion 111 and a second mounting portion 112 are provided on the outer wall of the reaction cup placement position 11, a fill light 1111 is installed in the first mounting portion 111, and a photosensor 1121 is installed in the second mounting portion 112; the control box 2 is fixedly installed on the experimental bracket 1, a control circuit board is installed in the control box 2, the fill light 1111 and the photosensor 1121 are connected to the control circuit board, and a timer 21, an indicator light 22, a photosensitivity threshold adjustment button 23 and a reset button 24 are installed on the surface of the control box 2.
[0024] A fill light port 1112 is provided inside the reaction cup placement position 11 at a position corresponding to the first mounting portion 111, and a detection port 1122 is provided at a position corresponding to the second mounting portion 112. The light of the fill light 1111 is emitted from the fill light port 1112, and the photosensitive sensor 1121 monitors the color change of the solution through the detection port 1122.
[0025] The specific experimental operation of the present application is as follows: first, install the experimental bracket 1 on the workbench 31 of the magnetic stirrer 3; secondly, place the 100ml beaker and the 50ml beaker in the reaction cup placement position 11 and the solution cup placement position 12 respectively; then, add the reaction liquid to the 100ml beaker, add another reaction liquid to the 50ml beaker, and then gently put the stirrer into the 100ml beaker; thereafter, transfer the solution in the 50ml beaker to the 100ml beaker and press the start switch of the magnetic stirrer 3 at the same time. The start switch of the magnetic stirrer 3 starts the magnetic stirrer 3 and the timer 21 at the same time, and the timer 21 starts timing. The function of the fill light 1112 is to provide a light source, and the photosensor 1122 detects the color change of the reaction liquid. When the color change of the reaction liquid causes the light intensity in the detection port 1122 to be lower than a certain threshold, a signal is transmitted through the photosensor 1122, and the timer 21 stops timing. At the same time, the indicator light 22 lights up, indicating termination. The reset button 24 can reset the timer 21 for the next round of experiments.
[0026] The three photosensitivity threshold adjustment buttons 23 are respectively used for testing the starch potassium iodide system, the potassium permanganate system, and the phenolphthalein system. The experiment of starch potassium iodide system mainly corresponds to the redox experiment. Potassium iodide is a reducing agent, and other oxidants such as ammonium persulfate can oxidize potassium iodide into elemental iodine. The starch in the solution will turn blue when it encounters elemental iodine, and the light received by the photosensor 1122 will become less. The blue is darker and the light is more obstructed. This change will be very obvious and easy to detect; potassium permanganate is an oxidant and is a dark purple solution. Generally, in experiments using potassium permanganate, potassium permanganate itself is used as an indicator of the reaction end point. After the reaction is completed, excess potassium permanganate will make the solution appear purple, but this change is not obvious enough. The threshold of the photosensor 1122 needs to be adjusted to be more sensitive to sense the change; phenolphthalein is an acid-base indicator, which is colorless under acidic conditions and red under alkaline conditions. In acid-base titration experiments, phenolphthalein is used as an indicator for the neutral or alkaline end point, and the color is also lighter under weak alkaline conditions. The photosensor 1122 also needs a very sensitive threshold to sense the change.
[0027] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.
[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A temperature-controlled stirring photosensitive timing device, comprising: An experimental support (1), a control box (2) and a magnetic stirrer (3), characterized in that: the experimental support (1) can be detachably mounted on the magnetic stirrer (3), the experimental support (1) is a disc-shaped hollow support, the experimental support (1) is provided with a reaction cup placement position (11) and a solution cup placement position (12), the reaction cup placement position (11) is arranged in the center of the experimental support (1) and is coaxially arranged with the experimental support (1), the solution cup placement position (12) is eccentrically arranged with the experimental support (1), and the outer wall of the reaction cup placement position (11) is provided with a first The invention relates to a mounting part (111) and a second mounting part (112), wherein a fill light (1111) is mounted in the first mounting part (111), and a photosensor (1121) is mounted in the second mounting part (112); the control box (2) is fixedly mounted on the experimental support (1), a control circuit board is mounted in the control box (2), the fill light (1111) and the photosensor (1121) are connected to the control circuit board, and a timer (21), an indicator light (22), a photosensitivity threshold adjustment button (23) and a reset button (24) are mounted on the surface of the control box (2).
2. A temperature-controlled stirring photosensitive timing device according to claim 1, characterized in that: A clamping claw (13) is fixedly installed below the experimental support (1), and the clamping claw (13) can be fixedly buckled on the working table (31) of the magnetic stirrer (3).
3. A temperature-controlled stirring photosensitive timing device according to claim 1, characterized in that: The reaction cup placement position (11) and the solution cup placement position (12) are cylinders that penetrate from top to bottom. The reaction cup placement position (11) is set according to the size of a 100ml beaker, and the solution cup placement position (12) is set according to the size of a 50ml beaker.
4. A temperature-controlled stirring photosensitive timing device according to claim 3, characterized in that: The reaction cup placement position (11), the solution cup placement position (12) and the experimental support (1) are fixed to form an integrated structure.
5. A temperature-controlled stirring photosensitive timing device according to claim 1, characterized in that: A fill light port (1112) is arranged inside the reaction cup placement position (11) at a position corresponding to the first mounting portion (111), and a detection port (1122) is arranged at a position corresponding to the second mounting portion (112).
6. A temperature-controlled stirring photosensitive timing device according to claim 1, characterized in that: The photosensitivity threshold adjustment buttons (23) are provided with three buttons, which are respectively used for testing the starch potassium iodide system, the potassium permanganate system, and the phenolphthalein system.