A chlorine gas reaction experimental teaching device

Abstract

This utility model discloses a chlorine reaction experimental teaching device in the field of experimental equipment technology. It includes a transparent frame, a reaction assembly mounted on the surface of the transparent frame for carrying out the chlorine reaction, and a heating assembly mounted on the surface of the transparent frame for providing a heat source. The heating assembly includes a heating element, a lithium battery, and a power controller. The lithium battery and power controller are both mounted on the back of the transparent frame and are electrically connected. The heating element is mounted on the front of the transparent frame and includes a thick-walled ground glass test tube, an MCH ceramic heating rod, and a rubber stopper. The rubber stopper is fitted over the opening of the thick-walled ground glass test tube, and the bottom end of the MCH ceramic heating rod is sealed through the rubber stopper and placed inside the thick-walled ground glass test tube. The MCH ceramic heating rod is electrically connected to the power controller. This utility model solves the problems of a lack of integrated experimental devices on the market, safety hazards in the heating method for the chlorine-metal reaction in experiments, difficulty in accurately controlling temperature, chlorine leakage, and environmental pollution.

Description

Technical Field

[0001] This utility model relates to the field of experimental equipment technology, specifically to a chlorine gas reaction experimental teaching device. Background Technology

[0002] Currently, many schools have limited chemistry lab equipment, especially in resource-scarce areas. Traditional chlorine gas experiment equipment may be difficult to popularize due to its high cost and complex operation. Furthermore, traditional chlorine-metal reaction experiments typically use alcohol lamps as a heat source. Alcohol lamps use open flames, which can easily cause fires and other safety accidents, especially in crowded classroom environments. Traditional chlorine gas experiment apparatus also has poor sealing, easily leading to chlorine leaks, which not only pollute the laboratory environment but may also harm the health of teachers and students. Utility Model Content

[0003] The purpose of this invention is to provide a chlorine reaction experiment teaching device to solve the safety accidents mentioned in the background art, such as the risk of fire caused by using alcohol lamps, especially in crowded classroom environments; and the problem that traditional chlorine experiment devices have poor sealing, which can easily lead to chlorine leakage, polluting the laboratory environment and potentially harming the health of teachers and students.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A chlorine reaction experimental teaching device includes a transparent frame, a reaction component mounted on the surface of the transparent frame for carrying out the chlorine reaction, and a heating component mounted on the surface of the transparent frame for providing a heat source to the chlorine reaction. The heating component includes a heating element, a lithium battery, and a power controller. The lithium battery and the power controller are both mounted on the back of the transparent frame and are electrically connected.

[0006] The heating assembly is installed on the front of the transparent frame. The heating assembly includes a thick-walled ground glass test tube, an MCH ceramic heating rod, and a rubber stopper. The rubber stopper is fitted over the opening of the thick-walled ground glass test tube. The bottom end of the MCH ceramic heating rod is sealed through the rubber stopper and placed inside the thick-walled ground glass test tube. The MCH ceramic heating rod is electrically connected to the power controller.

[0007] In a preferred embodiment of the present invention, the reaction assembly includes two plastic bottles, six sample bottles, and three reaction bottles for multiple filtration, with each plastic bottle and each sample bottle mounted on the front of the transparent frame and each reaction bottle mounted on the back of the transparent frame.

[0008] Two plastic bottles are arranged side by side from left to right and connected sequentially by pipes. Dilute hydrochloric acid and sodium hypochlorite are placed inside the two plastic bottles from left to right.

[0009] All six sample bottles are located on the right side of the plastic bottle and are arranged side by side from left to right. The six sample bottles are connected in sequence by a pipeline, and the leftmost sample bottle is connected to the adjacent plastic bottle by a pipeline. The pipeline connecting the fifth and sixth sample bottles is also equipped with a one-way valve for controlling the flow of chlorine gas. The six sample bottles contain, from left to right, saturated saline, concentrated sulfuric acid, dry red paper, moist red paper, moist starch-potassium iodide test paper, and sodium hydroxide.

[0010] The three reaction flasks are arranged side by side from left to right and connected in sequence by pipes. Sodium hydroxide is placed inside each of the three reaction flasks. The leftmost reaction flask is connected to the thick-walled ground glass test tube and the rightmost sample bottle by pipes. A balloon is also placed on top of the reaction flask at the right end.

[0011] The reaction assembly also includes a pumping tubing assembly for pumping reactants between plastic bottles, sample vials, and reaction vessels.

[0012] In a preferred embodiment of this utility model, the pumping pipe assembly includes a Luer multi-way integrated valve, a fluororubber hose, a peristaltic pump, and an air pump.

[0013] The peristaltic pump is installed on the pipeline between the two plastic bottles, and the lower port of the peristaltic pump is connected to the first plastic bottle from left to right via a fluororubber tube, and the upper port of the peristaltic pump is connected to the second plastic bottle from left to right via a fluororubber tube.

[0014] The air pump is connected to the peristaltic pump and the fluororubber tubing between the second plastic bottle from left to right via the air pump tubing;

[0015] The three ports of the Luerduotong integrated valve are connected to the second sample bottle, the third sample bottle and the thick-walled ground joint test tube from left to right respectively via fluororubber tubing.

[0016] Luer multi-port valves, thick-walled ground glass test tubes, plastic bottles, sample vials, and reaction flasks are all equipped with Luer connectors at their connection ports.

[0017] In a preferred embodiment of this utility model, a carrying handle is provided at the top of the transparent frame, and the carrying handle is fixedly connected to the transparent frame.

[0018] In a preferred embodiment of this utility model, the surface of the transparent frame is provided with a water pipe clamp for detachably securing the reaction components and the thick-walled ground joint test tube.

[0019] In a preferred embodiment of this utility model, fixed brackets are provided at both ends of the bottom surface of the transparent frame, and the fixed brackets are fixedly connected to the transparent frame.

[0020] In a preferred embodiment of this utility model, the air pump is disposed inside the housing of the power controller on the back of the transparent frame.

[0021] In a preferred embodiment of this utility model, an air pump pipeline is provided on the surface of the transparent frame. One end of the air pump pipeline passes through the transparent frame and is connected to the air pump, and the other end of the air pump pipeline is connected to the peristaltic pump and the fluororubber tubing between the second plastic bottle via a three-way valve.

[0022] In a preferred embodiment of this utility model, the control switch includes an air pump speed control switch, a peristaltic pump speed control switch, a peristaltic pump indicator light, a voltage adjustment switch, a power output interface, and a power indicator light; the air pump speed control switch, the peristaltic pump speed control switch, and the peristaltic pump indicator light are located on the upper left side of the front of the transparent frame and are fixedly connected to the transparent frame; the voltage adjustment switch, the power output interface, and the power indicator light are located on the upper right side of the front of the transparent frame and are fixedly connected to the transparent frame.

[0023] In a preferred embodiment of this utility model, the power controller includes an MCH ceramic heating rod power controller and a peristaltic pump and air pump power controller; the MCH ceramic heating rod power controller and the peristaltic pump and air pump power controller are electrically connected; the MCH ceramic heating rod power controller is located on the upper left side of the back of the transparent frame and is fixedly connected to the transparent frame; the peristaltic pump and air pump power controller is located on the upper right side of the back of the transparent frame and is fixedly connected to the transparent frame.

[0024] In a preferred embodiment of this invention, each reaction flask is provided with at least one air bubble stone.

[0025] This utility model has the following beneficial effects:

[0026] 1. The transparent acrylic frame design of the device allows students to clearly observe the phenomena and processes of the experiment, such as the color change of chlorine gas and the smoke produced by the reaction, so as to understand the properties of chlorine gas more intuitively. The portable design of the device (handheld) allows teachers to easily conduct on-site demonstrations in the classroom without having to carry a large number of instruments back and forth between the laboratory and the classroom.

[0027] 2. This program integrates experiments on the preparation and purification of chlorine gas, as well as various properties (such as its reaction with metals, solubility, bleaching properties, and oxidizing properties). It allows for the demonstration of multiple properties of chlorine gas in a single experiment, providing a complete experimental teaching experience. This helps students systematically master relevant knowledge about chlorine gas and enhances their understanding of chemical concepts.

[0028] 3. The closed design and efficient exhaust gas treatment system (such as an air pump to drive residual chlorine gas into the sodium hydroxide solution) effectively reduce chlorine leakage during the experiment, protecting the experimental environment and the health of personnel. This is crucial for ensuring the safety of teachers and students, especially in crowded classroom environments.

[0029] 4. Using an MCH ceramic heating rod instead of a traditional alcohol lamp as the heat source for the reaction of chlorine with metal avoids the safety hazards that may arise from using open flames, such as the risk of fire. At the same time, the temperature control of the ceramic heating rod is more stable and precise, which is conducive to the smooth progress of the experiment.

[0030] 5. The use of peristaltic pumps and air pumps, along with their corresponding speed switches and power controllers, enables precise control of the reaction rate and exhaust gas treatment. Teachers can easily adjust the peristaltic pump speed to control the chlorine generation rate, or quickly remove residual chlorine using the air pump, simplifying the experimental procedure. The Luer multi-channel integrated valve design allows for the separate execution of experiments with different properties, enabling teachers to flexibly select experimental content according to the teaching progress and better manage the pace of the class.

[0031] 6. The use of external thread Luer connectors and Luer movable straight male connectors facilitates the assembly and disassembly of the experimental apparatus. This is highly beneficial for pre-experiment preparation and post-experiment cleaning and maintenance, saving time and labor costs and improving the turnover efficiency of experimental equipment; the modular design of the apparatus allows for easy inspection and replacement of various components, reducing maintenance difficulty and costs. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a three-dimensional view of the present invention;

[0034] Figure 2 This is a front view of the present invention;

[0035] Figure 3 This is a rear view of the present invention;

[0036] Figure 4 This is a cross-sectional view of the heating component of this utility model;

[0037] Figure 5 This is a cross-sectional view of the reaction flask of this utility model.

[0038] 1. Transparent frame; 2. Fixing bracket; 3. Water pipe clamp; 4. Handle; 5. Luer multi-port valve; 6. Peristaltic pump; 7. Heating assembly; 8. Control switch; 9. Plastic bottle; 10. Sample bottle; 11. Power controller; 12. Lithium battery; 13. Reaction flask; 14. Luer connector; 15. Fluororubber tubing; 16. Air stone; 17. Balloon; 18. Air pump tubing; 71. Thick-walled ground glass test tube; 72. MCH ceramic heating rod; 73. Rubber stopper; 81. Air pump speed control switch; 82. Peristaltic pump speed control switch; 83. Peristaltic pump indicator light; 84. Voltage adjustment switch; 85. Power output interface; 86. Power indicator light; 111. MCH ceramic heating rod power controller; 112. Peristaltic pump and air pump power controller. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0040] One embodiment of this utility model:

[0041] See Figure 1-4 A chlorine reaction experimental teaching device includes a transparent frame 1, a transparent frame 1 of A3 paper size as the skeleton of the device, a reaction component installed on the surface of the transparent frame 1 for carrying out the chlorine reaction, and a heating component installed on the surface of the transparent frame 1 for providing a heat source. The heating component includes a heating component 7, a lithium battery 12 and a power controller 11. The lithium battery 12 and the power controller 11 are both installed on the back of the transparent frame 1 and are electrically connected.

[0042] The heating component 7 is installed on the front of the transparent frame 1. The heating component 7 includes a thick-walled ground joint test tube 71, an MCH ceramic heating rod 72, and a rubber stopper 73. The rubber stopper 73 is fitted onto the opening of the thick-walled ground joint test tube 71. The bottom end of the MCH ceramic heating rod 72 is sealed through the rubber stopper 73 and placed inside the thick-walled ground joint test tube 71. The MCH ceramic heating rod 72 is electrically connected to the power controller 11.

[0043] Using the MCH ceramic heating rod 72 as the heat source for the reaction, the device is compact, easy to operate, and reusable, eliminating the need for an alcohol lamp. The outer surface of the MCH ceramic heating rod 72 is equipped with a spiral-shaped heat-conducting metal wire. The solder joints of the MCH ceramic heating rod 72 are coated with high-temperature resistant inorganic adhesive, which cures in approximately 24 hours. The wires of the MCH ceramic heating rod 72 are connected to a PH2.0 2P male connector. Three holes are drilled in the rubber stopper 73, and a long glass conduit, a short glass conduit, and the improved MCH ceramic heating rod 72 are installed in each hole. An externally threaded Luer connector is then attached to the glass conduit. Finally, Teflon adhesive is applied to the top of the rubber stopper 73.

[0044] See Figure 1-3 The reaction assembly includes two plastic bottles 9, six sample bottles 10 and three reaction bottles 13, with each plastic bottle 9 and each sample bottle 10 mounted on the front of the transparent frame 1 and each reaction bottle 13 mounted on the back of the transparent frame 1.

[0045] Two plastic bottles 9 are arranged side by side from left to right and connected in sequence by pipes. Dilute hydrochloric acid and sodium hypochlorite are placed inside the two plastic bottles 9 from left to right.

[0046] Six sample bottles 10 are placed to the right of plastic bottle 9 and are arranged side by side from left to right. The six sample bottles 10 are connected in sequence by a pipeline, and the leftmost sample bottle 10 is connected to the adjacent plastic bottle 9 by a pipeline. The six sample bottles 10 contain, from left to right, saturated saline, concentrated sulfuric acid, dry red paper, moist red paper, moist starch-potassium iodide test paper and sodium hydroxide.

[0047] Three reaction flasks 13 are arranged side by side from left to right and connected in sequence by pipes. Sodium hydroxide is placed inside each of the three reaction flasks 13. The leftmost reaction flask 13 is connected to the thick-walled ground glass test tube 71 and the rightmost sample bottle 10 by pipes. A balloon 17 is also attached above the rightmost reaction flask 13. The balloon 17 can collect experimental gases and prevent air pollution during post-experiment processing.

[0048] The cap of reaction flask 13 is a Z60 adapter. The lower part of the Z60 adapter is connected to a glass tubing and is padded with a fluororubber gasket. The upper part of the Z60 adapter is fitted with an external thread Luer connector. The two ends of the fluororubber tubing 15 are connected with Luer movable straight male connectors. Fluororubber tubing 15 and fluororubber gaskets are used to connect the tubing and reaction flask 13 to improve the corrosion resistance of the device.

[0049] The reaction assembly also includes a pumping tubing assembly for pumping reactants between the plastic bottle 9, the sample vial 10, and the reaction vial 13.

[0050] See Figure 1-3 The pumping tubing assembly includes a Luer multi-port valve 5, a fluororubber hose 15, a peristaltic pump 6, and an air pump;

[0051] The lower port of the peristaltic pump 6 is connected to the first plastic bottle 9 from left to right via a fluororubber tube 15, and the upper port of the peristaltic pump 6 is connected to the first port of the second plastic bottle 9 via a fluororubber tube 15. The peristaltic pump 6 can be used to control the start and end of the reaction and control the reaction rate.

[0052] The air pump is connected to the peristaltic pump 6 and the second plastic bottle 9 via a fluororubber tube 15, and the air pump is located inside the power controller 11 housing on the back of the transparent frame 1.

[0053] An air pump pipe 18 is provided on the surface of the transparent frame 1. One end of the air pump pipe 18 passes through the transparent frame 1 and is connected to the air pump. The other end of the air pump pipe 18 is connected to the peristaltic pump 6 and the fluororubber tube 15 between the second plastic bottle 9 through a three-way valve. The air pump can drive all the residual exhaust gas in the device to the exhaust gas treatment device to prevent air pollution during post-experiment processing.

[0054] The three ports of the Luerduotong integrated valve 5 are connected to the second sample bottle 10, the third sample bottle 10 and the thick-walled ground joint test tube 71 from left to right respectively via fluororubber tubing 15.

[0055] The ports of the Luer multi-port valve 5, heating assembly 7, plastic bottle 9, sample bottle 10 and reaction bottle 13 are all equipped with Luer connectors 14;

[0056] The upper half of the transparent frame 1 is equipped with a Luer multi-port valve 5 for connecting the heating assembly 7 with other test tubes. The Luer multi-port valve 5 is screwed and fixed to the transparent frame 1. The property experiment can be carried out separately using the Luer multi-port valve 5.

[0057] See Figure 1-2 A carrying handle 4 is provided at the top of the transparent frame 1, and the carrying handle 4 is fixedly connected to the transparent frame 1; so that the entire device can be carried by hand for experimental demonstrations, and the device is portable and easy to operate.

[0058] See Figure 1-3 The transparent frame 1 is provided with a water pipe clamp 3 for detachably holding the reaction components and the thick-walled ground joint test tube 71; thus realizing the integration of the device and making it easier to install the test tube, plastic bottle 9, sample bottle 10 and reaction bottle 13 on the transparent frame 1.

[0059] See Figure 1-3 The bottom of the transparent frame 1 is provided with fixed brackets 2 at both ends, and the fixed brackets 2 are fixedly connected to the transparent frame 1; which can play a good supporting role.

[0060] See Figure 1-2The power controller 11 is electrically connected to a control switch 8 for adjustment and control. The control switch 8 includes an air pump speed control switch 81, a peristaltic pump speed control switch 82, a peristaltic pump indicator light 83, a voltage adjustment switch 84, a power output terminal interface 85, and a power indicator light 86.

[0061] Air pump speed control switch 81, peristaltic pump speed control switch 82, and peristaltic pump indicator light 83 are located on the upper left front of the transparent frame 1 and are fixedly connected to the transparent frame 1; voltage adjustment switch 84, power output interface 85, and power indicator light 86 are located on the upper right front of the transparent frame 1 and are fixedly connected to the transparent frame 1, and are all connected to the power controller on the back.

[0062] See Figure 3 The power controller 11 includes an MCH ceramic heating rod power controller 111 and a peristaltic pump and air pump power controller 112; the MCH ceramic heating rod power controller 111 and the peristaltic pump and air pump power controller 112 are electrically connected by wires; the MCH ceramic heating rod power controller 111 is located on the upper left side of the back of the transparent frame 1 and is screwed to the transparent frame 1; the peristaltic pump and air pump power controller 112 is located on the upper right side of the back of the transparent frame 1 and is screwed to the transparent frame 1.

[0063] See Figure 5 A bubble stone 16 is added to the bottom of the glass tube of the reaction flask 13 containing sodium hydroxide to disperse chlorine gas into fine and uniform bubbles, thereby improving the contact efficiency between chlorine gas and liquid and controlling the reaction rate.

[0064] The working principle of this utility model:

[0065] A chlorine reaction experiment teaching device, with a transparent frame 1 as the main body, integrates components such as a peristaltic pump 6, an air pump, a heating component 7, a control switch 8, a power controller 11, and a lithium battery 12, to achieve efficient integration of chlorine preparation, purification, and experiments on various properties.

[0066] The lithium battery 12 powers the entire device, and the power controller 11 coordinates the power supply needs of each component. The control switch 8 can adjust the speed of the air pump and the peristaltic pump 6 to control the chlorine generation rate and achieve precise control of the experimental process; the airflow path can be switched through the Luer multi-way valve to switch different paths according to different experiments.

[0067] At the start of the experiment, the peristaltic pump 6 was started by the control switch. The peristaltic pump 6 pumped dilute hydrochloric acid from the first plastic bottle from left to right into the second plastic bottle containing sodium hypochlorite at a constant speed. The two reacted to generate chlorine gas. The generated chlorine gas was then passed through a saturated saline gas washing bottle in the first sample bottle 10 to remove impurities, and then dried in concentrated sulfuric acid in the second sample bottle 10 to ensure the purity of the chlorine gas.

[0068] The dried chlorine gas can be used directly in subsequent chlorine property experiments, such as the bleaching and oxidizing properties of chlorine gas, and the reaction of chlorine gas with metals.

[0069] In the bleaching and oxidizing experiments of chlorine, dry red paper, moist red paper, and moist starch-potassium iodide test paper were placed in the third, fourth, and fifth sample bottles 10 from left to right in sequence. First, the peristaltic pump speed control switch 82 was turned on, and then the Luer multi-channel valve 5 was adjusted so that the dry chlorine gas passed through the three sample bottles 10 in sequence. After about 2 minutes, obvious phenomena could be observed. The fading phenomenon was compared when the dry chlorine gas passed through the dry and moist red paper. The chlorine gas oxidized the potassium iodide, turning the starch test paper blue.

[0070] In the experiment of chlorine reacting with metal, a metal wire is wound around an MCH ceramic heating rod 72 and heated to a red-hot state. After chlorine gas is introduced, the reaction produces metal chlorides, and brownish-yellow smoke is observed. The MCH ceramic heating rod 72 replaces the traditional alcohol lamp as a heat source, providing stable and precise temperature control to ensure the safe conduct of the experiment.

[0071] After the experiment, turn on the air pump speed control switch 81 to discharge the residual chlorine gas in the device into the reaction flask 13 containing sodium hydroxide solution. The residual chlorine gas is absorbed by the sodium hydroxide solution to generate harmless sodium chloride and sodium hypochlorite; the air bubble stone 16 refines the chlorine gas bubbles to improve absorption efficiency; the balloon 17 collects unreacted chlorine gas to prevent direct emission and avoid environmental pollution.

[0072] The specific destination of the residual chlorine gas:

[0073] Turn on the air pump, and let the air flow through the air pump pipe 18 through the second plastic bottle 9 from left to right where chlorine is generated. Then, let the air flow through the first sample bottle 10, the second sample bottle 10, and the Luer multi-port valve 5 along the connecting pipes. Adjust the Luer multi-port valve 5 according to different experiments to send the residual chlorine to the reaction bottle 13.

[0074] In the experiment on the bleaching and oxidizing properties of chlorine, the Luer multi-channel valve 5 is adjusted so that the gas flow passes through the third, fourth, fifth and sixth sample bottles 10 from left to right, and then the residual chlorine is transported to the reaction bottle 13 through the connecting pipe of the sixth sample bottle 10.

[0075] In the experiment of chlorine reacting with metal, the Luer multi-channel valve 5 is adjusted, and the gas flow passes through the heating component 7 to transport the residual chlorine in the thick-walled ground joint test tube 71 to the reaction flask 13 through the connecting pipe between the heating component 7 and the reaction flask 13.

[0076] Finally, after being filtered through the sodium hydroxide reaction in the three reaction flasks 13, it is transported to the balloon 17 for collection.

[0077] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0078] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A chlorine gas reaction experimental teaching device, characterized in that: The device includes a transparent frame (1), a reaction assembly mounted on the surface of the transparent frame (1) for carrying out the chlorine reaction, and a heating assembly mounted on the surface of the transparent frame (1) for providing a heat source to the chlorine reaction. The heating assembly includes a heating component (7), a lithium battery (12), and a power controller (11). The lithium battery (12) and the power controller (11) are both mounted on the back of the transparent frame (1) and are electrically connected. The heating component (7) is mounted on the front of the transparent frame (1). The heating component (7) includes a thick-walled ground joint test tube (71), an MCH ceramic heating rod (72), and a rubber stopper (73). The rubber stopper (73) is fitted onto the opening of the thick-walled ground joint test tube (71). The bottom end of the MCH ceramic heating rod (72) is sealed through the rubber stopper (73) and placed inside the thick-walled ground joint test tube (71). The MCH ceramic heating rod (72) is electrically connected to the power controller (11).

2. The chlorine reaction experimental teaching device according to claim 1, characterized in that: The reaction assembly includes two plastic bottles (9), six sample bottles (10) and three reaction bottles (13), with each plastic bottle (9) and each sample bottle (10) mounted on the front of the transparent frame (1) and each reaction bottle (13) mounted on the back of the transparent frame (1); Two plastic bottles (9) are arranged side by side from left to right and connected in sequence by pipes. Dilute hydrochloric acid and sodium hypochlorite are placed inside the two plastic bottles (9) from left to right. Six sample bottles (10) are all placed on the right side of the plastic bottle (9) and the sample bottles (10) are arranged side by side from left to right. The six sample bottles (10) are connected in sequence through pipes, and the leftmost sample bottle (10) is connected to the adjacent plastic bottle (9) through pipes. The six sample bottles (10) contain saturated saline, concentrated sulfuric acid, dry red paper, moist red paper, moist starch potassium iodide test paper and sodium hydroxide in sequence from left to right. Three reaction flasks (13) are arranged side by side from left to right and connected in sequence by pipes. Sodium hydroxide is placed inside each of the three reaction flasks (13). The leftmost reaction flask (13) is connected to the thick-walled ground glass test tube (71) and the rightmost sample bottle (10) by pipes. A balloon (17) is also placed on top of the reaction flask (13) on the right. The reaction assembly also includes a pumping tubing assembly for pumping reactants between the plastic bottle (9), sample vial (10), and reaction vessel (13).

3. A chlorine reaction experimental teaching device according to claim 2, characterized in that: The pumping tubing assembly includes a Luer multi-port valve (5), a fluororubber hose (15), a peristaltic pump (6), and an air pump; The peristaltic pump (6) is installed on the pipeline between the two plastic bottles (9), and the lower port of the peristaltic pump (6) is connected to the first plastic bottle (9) from left to right via a fluororubber tube (15), and the upper port of the peristaltic pump (6) is connected to the second plastic bottle (9) from left to right via a fluororubber tube (15). The air pump is connected to the peristaltic pump (6) and the fluororubber tubing (15) between the air pump line (18) and the second plastic bottle (9) from left to right; The three ports of the Luerduotong integrated valve (5) are connected to the second sample bottle (10), the third sample bottle (10), and the thick-walled ground joint test tube (71) from left to right respectively via fluororubber tubing (15). The connection ports of the Luer multi-port valve (5), the thick-walled ground joint test tube (71), the plastic bottle (9), the sample bottle (10), and the reaction bottle (13) are all equipped with Luer connectors (14).

4. A chlorine reaction experimental teaching device according to claim 1, characterized in that: A handle (4) is provided at the top of the transparent frame (1).

5. A chlorine reaction experimental teaching device according to claim 1, characterized in that: The transparent frame (1) surface is provided with a water pipe clamp (3) for removably securing the reaction components and the thick-walled ground joint test tube (71).

6. A chlorine reaction experimental teaching device according to claim 1, characterized in that: The air pump is located inside the housing of the power controller (11) on the back of the transparent frame (1).

7. A chlorine reaction experimental teaching device according to claim 1, characterized in that: The power controller (11) is electrically connected to a control switch (8) for regulating control.

8. A chlorine reaction experimental teaching device according to claim 2, characterized in that: Each reaction flask (13) contains at least one air stone (16).

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