Modularized experimental device for electrolyzed water

Abstract

The invention belongs to the technical field of teaching experiment devices, and particularly relates to a modularized experiment device for electrolyzing water, which comprises a fixed plate, a water storage box, a hydrogen pipe and an oxygen pipe are arranged on one plate surface of the fixed plate, a water electrolysis device is arranged on the other plate surface of the fixed plate, and a water inlet and a water outlet of the water electrolysis device are communicated with the water storage box. A hydrogen outlet of the water electrolysis device is communicated with the hydrogen pipe inlet, an oxygen outlet of the water electrolysis device is communicated with the oxygen pipe inlet, a water storage box water inlet is formed in the top of the water storage box, the lower end of the hydrogen pipe is communicated with the water storage box, and a hydrogen outlet is formed in the upper end of the hydrogen pipe; the lower end of the oxygen pipe communicates with the water storage box, an oxygen outlet is formed in the upper end of the oxygen pipe, a detachable hydrogen and oxygen detection device is arranged above the fixing plate, and the hydrogen outlet and the oxygen outlet are both connected with the detachable hydrogen and oxygen detection device. The device is convenient to disassemble and move, is not liable to break, and can meet the teaching requirements of various scenes.

Description

Technical Field

[0001] The invention belongs to the technical field of teaching experimental devices, and in particular relates to a modular experimental device for electrolyzing water. Background Art

[0002] In the section "Exploration of the Composition and Changes of Water", it is necessary to make students deeply understand through experiments that water is a compound composed of hydrogen and oxygen elements, master the chemical formula of water H2O and its meaning, and form a correct concept of material composition. Two water electrolysis device experiments are mentioned in the junior high school textbook. One water electrolysis device 5 is provided with two vertical tubes, the lower ends of the two vertical tubes are connected by a horizontal tube, and the lower ends of the two vertical tubes are respectively connected to the positive and negative electrodes of the battery. The upper end of the vertical tube connected to the positive electrode outputs oxygen, and the upper end of the vertical tube connected to the negative electrode outputs hydrogen. A spherical liquid inlet funnel is provided on the horizontal tube, so that students can clearly observe the generation of oxygen and hydrogen. The experimental device is large in size, and the glass test tube is connected to the electrode through a wire, which is not easy to place and is easy to break. Another method is to invert the two test tubes in a discarded mineral water bottle, and the mouth of the mineral water bottle is provided with a rubber plug, which is connected to a power supply. The positive and negative poles of the power supply are respectively set at the opening positions of the two test tubes. The battery electrolyzes the water in the test tubes, so that the two test tubes collect hydrogen and oxygen respectively. During the use of this method, the test tube needs to be kept in a vertical state at all times, and the electrolysis of the test tube needs to be observed at any time. When the test tube is taken out after collecting the gas, both hands need to be immersed in corrosive sodium hydroxide or sulfuric acid solution, which has certain safety risks. In addition, the amount of hydrogen produced by this method is large. When conducting group experiments for multiple groups of students at the same time, there is a risk of hydrogen accumulation in the laboratory and explosion. Moreover, the current experimental device is relatively simple and cannot meet the needs of diversified teaching. Therefore, the existing technology needs to be further improved. Summary of the invention

[0003] The purpose of the present invention is to provide a modular experimental device for electrolyzing water that can be easily disassembled and moved, is not easy to break, and can be used to meet the teaching needs of various scenarios.

[0004] Based on the above purpose, the present invention adopts the following technical solutions: A modular experimental device for electrolyzing water comprises a fixed plate, wherein a water storage box, a hydrogen pipe and an oxygen pipe are arranged on one surface of the fixed plate, a water electrolysis device is arranged on the other surface of the fixed plate, a water inlet of the water electrolysis device and a water outlet of the water electrolysis device are connected to the water storage box, a hydrogen pipe air inlet is arranged on the upper part of the hydrogen pipe, an oxygen pipe air inlet is arranged on the upper part of the oxygen pipe, a hydrogen outlet of the water electrolysis device is connected to the hydrogen pipe air inlet, an oxygen outlet of the water electrolysis device is connected to the oxygen pipe air inlet, a water storage box water inlet is arranged on the top of the water storage box, a lower end of the hydrogen pipe is connected to the water storage box and an upper end is provided with a hydrogen outlet, a lower end of the oxygen pipe is connected to the water storage box and an upper end is provided with an oxygen outlet, a detachable hydrogen and oxygen detection device is arranged above the fixed plate, and both the hydrogen outlet and the oxygen outlet are connected to the detachable hydrogen and oxygen detection device.

[0005] Furthermore, the fixing plate, hydrogen tube and oxygen tube are made of transparent acrylic material.

[0006] Furthermore, scale lines are provided on one side edge of the hydrogen tube and the oxygen tube.

[0007] Furthermore, the hydrogen and oxygen detection device is a first hydrogen and oxygen detection module, which includes a hydrogen and oxygen fuel cell and a fan, the hydrogen outlet is connected to the hydrogen inlet of the hydrogen and oxygen fuel cell, the oxygen outlet is connected to the oxygen inlet of the hydrogen and oxygen fuel cell, and the hydrogen and oxygen fuel cell is connected to the fan.

[0008] Furthermore, the hydrogen and oxygen fuel cell and the fan are fixed on the first support plate, the hydrogen inlet of the hydrogen and oxygen fuel cell is connected to the first pipe, the oxygen outlet of the hydrogen and oxygen fuel cell is connected to the second pipe, the first pipe and the second pipe pass through the support plate, the first pipe can be inserted into and connected to the hydrogen outlet of the hydrogen pipe, and the second pipe can be inserted into the oxygen outlet.

[0009] Furthermore, the hydrogen and oxygen detection device is a second hydrogen and oxygen detection module, which includes an S-shaped tube and a U-shaped tube. One end of the S-shaped tube is connected to the oxygen outlet, and the other end of the S-shaped tube is sleeved with a bent tube. One end of the U-shaped tube is connected to the hydrogen outlet, and the other end of the U-shaped tube is connected to a beaker filled with soapy water. Valves are provided on the S-shaped tube and the U-shaped tube.

[0010] Furthermore, the S-shaped tube and the U-shaped tube are fixed to the second support plate, one end of the S-shaped tube passes through the second support plate and is located below the second support plate, the other end of the S-shaped tube is located above the support plate and extends into the bottom of the beaker filled with soapy water, one end of the U-shaped tube passes through the second support plate and is located below the second support plate, and the other end of the S-shaped tube passes through the second support plate and is located below the second support plate.

[0011] Furthermore, the hydrogen and oxygen detection device is a third hydrogen and oxygen detection module, which includes an igniter, the lower end of the igniter is connected to an L-shaped tube, the upper end of the L-shaped tube is connected to the igniter, the lower end of the L-shaped tube is connected to a detachable rubber plug, the rubber plug is connected to the igniter through a connecting line, and two first air vents and a second air vent that can be connected to the hydrogen outlet and the oxygen outlet are respectively provided at the transverse pipeline position of the L-shaped tube.

[0012] Furthermore, a detachable connecting base is provided at the bottom of the fixing plate, and a groove for inserting the fixing plate is provided on the base.

[0013] The present invention uses a transparent acrylic plate to make a water storage box, a hydrogen tube and an oxygen tube, which is convenient for students to observe the changes in electrolyzed water and the process of generating hydrogen and oxygen during the experiment. The present invention also provides a detachable hydrogen and oxygen detection device. One hydrogen and oxygen detection device uses a hydrogen and oxygen fuel cell. When hydrogen and oxygen are passed into the hydrogen and oxygen fuel cell, the hydrogen and oxygen fuel cell can generate electricity to drive the fan to rotate, which can intuitively prove the generation of hydrogen and oxygen, and also reduce the explosion when burning hydrogen. The other is to facilitate students to operate by setting an S-shaped tube and a U-shaped tube. The S-shaped tube passes oxygen and proves the existence of oxygen by ignition, while the U-shaped tube passes hydrogen through soap bubbles generated by soapy water to collect hydrogen. Ignition of the soap bubbles can prove the existence of hydrogen, and also reduce the process of hydrogen mixing with other gases to produce explosions. A third hydrogen and oxygen detection module is also provided to prove that hydrogen and oxygen are mixed and exploded. The first hydrogen and oxygen detection module, the second hydrogen and oxygen detection module and the third hydrogen and oxygen detection module of the present invention can be disassembled for use. According to teaching needs, one of them can be selected for use, which has high flexibility. The hydrogen tube and the oxygen tube of the present invention are provided with scale lines on one side edge, so that the production amount of hydrogen and oxygen can be calculated. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 for Figure 1 The main view of Figure 3 for Figure 2 Rear view of Figure 4 for Figure 1 Schematic diagram of the structure of the hydrogen and oxygen detection device; Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 6 It is the position relationship diagram of S-type tube and U-type tube; Figure 7 This is the position relationship diagram of the igniter and the L-shaped tube; Figure 8 is a schematic diagram of the structure of the base; Fig. 9 It is a schematic diagram of the structure connecting the base and the extension plate. DETAILED DESCRIPTION Example

[0015] Depend on Figure 1-48 shows a modular experimental device for electrolyzing water, comprising a fixed plate 1, which is a transparent acrylic plate, a water storage box 2, a hydrogen tube 3 and an oxygen tube 4 are arranged on one surface of the fixed plate 1, a water electrolysis device 5 is arranged on the other surface of the fixed plate 1, the water electrolysis device 5 is a PEM water electrolysis device, a water inlet 501 of the water electrolysis device and a water outlet 502 of the water electrolysis device are connected to the water storage box 2, a hydrogen tube air inlet 302 is arranged on the upper part of the hydrogen tube 3, an oxygen tube air inlet 402 is arranged on the upper part of the oxygen tube 4, and a water The hydrogen outlet of the electrolysis device 5 is connected to the hydrogen pipe air inlet 302, the oxygen outlet of the water electrolysis device 5 is connected to the oxygen pipe 4 air inlet, the water box 2 is provided with a water box water inlet 201 at the top, the hydrogen pipe 3 is connected to the water box 2 at the lower end and is provided with a hydrogen outlet 301 at the upper end, the oxygen pipe 4 is connected to the water box 2 at the lower end and is provided with an oxygen outlet 401 at the upper end, and a detachable hydrogen and oxygen detection device 6 is provided above the fixed plate 1, and the hydrogen outlet 301 and the oxygen outlet 401 are both connected to the detachable hydrogen and oxygen detection device 6. The hydrogen pipe and the oxygen pipe are provided with scale lines on one side edge. The hydrogen and oxygen detection device 6 includes a hydrogen and oxygen fuel cell 61 and a fan 62, the hydrogen outlet 301 is connected to the hydrogen inlet 611 of the hydrogen and oxygen fuel cell, the oxygen outlet 401 is connected to the oxygen inlet 612 of the hydrogen and oxygen fuel cell, and the hydrogen and oxygen fuel cell 61 is connected to the fan 62. The fixed plate 1, the hydrogen pipe 3 and the oxygen pipe 4 are made of transparent acrylic material. The hydrogen and oxygen fuel cell 61 and the fan 62 are fixed to the first support plate 613, the hydrogen inlet 611 of the hydrogen and oxygen fuel cell is connected to the first pipe 7, and the oxygen outlet 612 of the hydrogen and oxygen fuel cell is connected to the second pipe 8. The first pipe 7 and the second pipe 8 pass through the support plate, the first pipe 7 can be inserted into and connected to the hydrogen outlet 301 of the hydrogen pipe, and the second pipe 8 can be inserted into the oxygen outlet 401. A detachable connection base 9 is provided at the bottom of the fixing plate 1, and a groove 91 is provided on the base 9 for inserting the fixing plate 1.

[0016] When in use, the PEM water electrolysis device 5 is turned on, the water storage box 2 enters from the water inlet 501 of the water electrolysis device, and then comes out from the water outlet 502 of the water electrolysis device. The hydrogen after the water electrolysis device 5 electrolyzes water enters the hydrogen pipe 3 from the hydrogen pipe air inlet 302 and then comes out from the hydrogen outlet 301, and then enters the hydrogen and oxygen fuel cell 6 through the hydrogen inlet 611 of the hydrogen and oxygen fuel cell. The oxygen after the water electrolysis device 5 electrolyzes water enters the oxygen pipe 4 from the oxygen pipe air inlet 402 and then comes out from the oxygen outlet 401, and then enters the hydrogen and oxygen fuel cell 6 from the hydrogen and oxygen fuel cell oxygen inlet 612. Then the hydrogen and oxygen fuel cell 6 generates electricity to drive the fan to rotate, which proves that oxygen and hydrogen are generated after water electrolysis. Example

[0017] Depend on Figure 5 , 6The modular experimental device for electrolyzing water shown in the figure comprises a fixed plate 1, a water storage box 2, a hydrogen tube 3 and an oxygen tube 4 are arranged on one surface of the fixed plate 1, a water electrolysis device 5 is arranged on the other surface of the fixed plate 1, the water electrolysis device 5 is a PEM water electrolysis device, a water inlet 501 of the water electrolysis device and a water outlet 502 of the water electrolysis device are connected to the water storage box 2, a hydrogen tube air inlet 302 is arranged on the upper part of the hydrogen tube 3, an oxygen tube air inlet 402 is arranged on the upper part of the oxygen tube 4, and the water electrolysis device 5 is a PEM water electrolysis device. The gas outlet is connected to the hydrogen pipe air inlet 302, the oxygen outlet of the water electrolysis device 5 is connected to the oxygen pipe 4 air inlet, the top of the water storage box 2 is provided with a water storage box water inlet 201, the lower end of the hydrogen pipe 3 is connected to the water storage box 2 and the upper end is provided with a hydrogen outlet 301, the lower end of the oxygen pipe 4 is connected to the water storage box 2 and the upper end is provided with an oxygen outlet 401, a detachable hydrogen and oxygen detection device 6 is provided above the fixed plate 1, and the hydrogen outlet 301 and the oxygen outlet 401 are both connected to the detachable hydrogen and oxygen detection device 6. The hydrogen pipe and the oxygen pipe are provided with scale lines on one side edge. The hydrogen and oxygen detection device 6 includes an S-shaped tube 62 and a U-shaped tube 63, one end of the S-shaped tube 62 is connected to the oxygen outlet 401, the other end of the S-shaped tube 62 is sleeved with a bend 10, one end of the U-shaped tube 63 is connected to the hydrogen outlet 301, and the other end of the U-shaped tube 63 is connected to the beaker 11 filled with soapy water, and valves 12 are provided on the S-shaped tube 62 and the U-shaped tube 63. The fixing plate 1, hydrogen tube 3 and oxygen tube 4 are made of transparent acrylic material. The S-shaped tube 62 and U-shaped tube 63 are fixed to the second supporting plate, one end of the S-shaped tube 62 passes through the second supporting plate 13 and is located below the second supporting plate 13, the other end of the S-shaped tube 62 is located above the supporting plate and penetrates into the bottom of the beaker 11 filled with soapy water, one end of the U-shaped tube 63 passes through the second supporting plate and is located below the second supporting plate, and the other end of the S-shaped tube passes through the second supporting plate and is located below the second supporting plate. A detachable connecting base 9 is provided at the bottom of the fixing plate 1, and a groove 91 is provided on the base 9 for the fixing plate 1 to be inserted.

[0018] When in use, the PEM water electrolysis device 5 is turned on, and the water storage box 2 enters from the water inlet 501 of the water electrolysis device and then comes out from the water outlet 502 of the water electrolysis device. The hydrogen after the water electrolysis device 5 electrolyzes water enters the hydrogen tube 3 from the hydrogen tube air inlet 302 and then comes out from the hydrogen outlet 301, and then enters the beaker 11 through one end of the U-shaped tube 63, is wrapped by soap bubbles and collected, and then the igniter 14 can be used to ignite the hydrogen in the soap bubbles, proving the generation of hydrogen. The oxygen after the water electrolysis device 5 electrolyzes water enters the oxygen tube 4 from the oxygen tube air inlet 402 and then comes out from the oxygen outlet 401, and then enters the curved tube 10 from the S-shaped tube 62. If a wooden stick with sparks is inserted into the curved tube mouth, re-ignition can be observed, proving that oxygen is generated. Example

[0019] Depend on Figure 1-4, 7, and 8 show a modular experimental device for electrolyzing water, comprising a fixed plate 1, which is a transparent acrylic plate, a water storage box 2, a hydrogen tube 3, and an oxygen tube 4 are arranged on one surface of the fixed plate 1, a water electrolysis device 5 is arranged on the other surface of the fixed plate 1, and the water electrolysis device 5 is a PEM water electrolysis device, a water inlet 501 of the water electrolysis device and a water outlet 502 of the water electrolysis device are connected to the water storage box 2, a hydrogen tube air inlet 302 is arranged on the upper part of the hydrogen tube 3, and an oxygen tube air inlet 402 is arranged on the upper part of the oxygen tube 4, The hydrogen outlet of the water electrolysis device 5 is connected to the hydrogen pipe air inlet 302, the oxygen outlet of the water electrolysis device 5 is connected to the oxygen pipe 4 air inlet, the top of the water storage box 2 is provided with a water storage box water inlet 201, the lower end of the hydrogen pipe 3 is connected to the water storage box 2 and the upper end is provided with a hydrogen outlet 301, the lower end of the oxygen pipe 4 is connected to the water storage box 2 and the upper end is provided with an oxygen outlet 401, a detachable hydrogen and oxygen detection device 6 is provided above the fixed plate 1, and the hydrogen outlet 301 and the oxygen outlet 401 are both connected to the detachable hydrogen and oxygen detection device 6. The hydrogen pipe and the oxygen pipe are provided with scale lines on one side edge.

[0020] The hydrogen and oxygen detection device is a third hydrogen and oxygen detection module, which includes an igniter 14, the lower end of the igniter 14 is connected to an L-shaped tube 15, the upper end of the L-shaped tube 15 is connected to the igniter 14, the lower end of the L-shaped tube 15 is connected to a detachable rubber plug 16, and the rubber plug 16 is connected to the igniter 14 through a connecting line 17. Two first vents and a second vent that can be connected to a hydrogen outlet and an oxygen outlet are respectively provided at the transverse pipeline position of the L-shaped tube 15.

[0021] When in use, the rubber plug 16 is used to seal the lower end opening of the L-shaped tube 15, the first vent is inserted into the hydrogen outlet, the second vent is inserted into the oxygen outlet, and the igniter 14 is turned on. Oxygen and hydrogen are mixed in the L-shaped tube 15, and an explosion sound can be emitted. Example

[0022] Depend on Figure 1-9The modular experimental device for electrolyzing water shown in the figure comprises a fixed plate 1, a water storage box 2, a hydrogen tube 3 and an oxygen tube 4 are arranged on one surface of the fixed plate 1, a water electrolysis device 5 is arranged on the other surface of the fixed plate 1, the water electrolysis device 5 is a PEM water electrolysis device, a water inlet 501 of the water electrolysis device and a water outlet 502 of the water electrolysis device are connected to the water storage box 2, a hydrogen tube air inlet 302 is arranged on the upper part of the hydrogen tube 3, an oxygen tube air inlet 402 is arranged on the upper part of the oxygen tube 4, and the water electrolysis device 5 is a PEM water electrolysis device. The gas outlet is connected to the hydrogen pipe air inlet 302, the oxygen outlet of the water electrolysis device 5 is connected to the oxygen pipe 4 air inlet, the top of the water storage box 2 is provided with a water storage box water inlet 201, the lower end of the hydrogen pipe 3 is connected to the water storage box 2 and the upper end is provided with a hydrogen outlet 301, the lower end of the oxygen pipe 4 is connected to the water storage box 2 and the upper end is provided with an oxygen outlet 401, a detachable hydrogen and oxygen detection device 6 is provided above the fixed plate 1, and the hydrogen outlet 301 and the oxygen outlet 401 are both connected to the detachable hydrogen and oxygen detection device 6. The hydrogen pipe and the oxygen pipe are provided with scale lines on one side edge.

[0023] The hydrogen and oxygen detection device 6 includes a first hydrogen and oxygen detection module, which includes a hydrogen and oxygen fuel cell 61 and a fan 62. The hydrogen outlet 301 is connected to the hydrogen inlet 611 of the hydrogen and oxygen fuel cell, and the oxygen outlet 401 is connected to the oxygen inlet 612 of the hydrogen and oxygen fuel cell. The hydrogen and oxygen fuel cell 61 is connected to the fan 62. The fixed plate 1, the hydrogen pipe 3 and the oxygen pipe 4 are made of transparent acrylic material. The hydrogen and oxygen fuel cell 61 and the fan 62 are fixed to the first support plate 613, the hydrogen inlet 611 of the hydrogen and oxygen fuel cell is connected to the first pipeline 7, and the oxygen outlet 612 of the hydrogen and oxygen fuel cell is connected to the second pipeline 8. The first pipeline 7 and the second pipeline 8 pass through the support plate, and the first pipeline 7 can be inserted and connected to the hydrogen outlet 301 of the hydrogen pipe, and the second pipeline 8 can be inserted into the oxygen outlet 401. A detachable connection base 9 is provided at the bottom of the fixed plate 1, and a groove 91 for inserting the fixed plate 1 is provided on the base 9.

[0024] When in use, the PEM water electrolysis device 5 is turned on, the water storage box 2 enters from the water inlet 501 of the water electrolysis device, and then comes out from the water outlet 502 of the water electrolysis device. The hydrogen after the water electrolysis device 5 electrolyzes water enters the hydrogen pipe 3 from the hydrogen pipe air inlet 302 and then comes out from the hydrogen outlet 301, and then enters the hydrogen and oxygen fuel cell 6 through the hydrogen inlet 611 of the hydrogen and oxygen fuel cell. The oxygen after the water electrolysis device 5 electrolyzes water enters the oxygen pipe 4 from the oxygen pipe air inlet 402 and then comes out from the oxygen outlet 401, and then enters the hydrogen and oxygen fuel cell 6 from the hydrogen and oxygen fuel cell oxygen inlet 612. Then the hydrogen and oxygen fuel cell 6 generates electricity to drive the fan to rotate, which proves that oxygen and hydrogen are generated after water electrolysis.

[0025] The hydrogen and oxygen detection device 6 includes a second hydrogen and oxygen detection module, which includes an S-shaped tube 62 and a U-shaped tube 63. One end of the S-shaped tube 62 is connected to the oxygen outlet 401, and the other end of the S-shaped tube 62 is sleeved with a bend 10. One end of the U-shaped tube 63 is connected to the hydrogen outlet 301, and the other end of the U-shaped tube 63 is connected to the beaker 11 filled with soapy water. A valve 12 is provided on the S-shaped tube 62 and the U-shaped tube 63. The fixing plate 1, the hydrogen tube 3 and the oxygen tube 4 are made of transparent acrylic material. The S-shaped tube 62 and the U-shaped tube 63 are fixed on the second support plate, one end of the S-shaped tube 62 passes through the second support plate 13 and is located below the second support plate 13, the other end of the S-shaped tube 62 is located above the support plate and penetrates into the bottom of the beaker 11 filled with soapy water, one end of the U-shaped tube 63 passes through the second support plate and is located below the second support plate, and the other end of the S-shaped tube passes through the second support plate and is located below the second support plate. A detachable connecting base 9 is provided at the bottom of the fixing plate 1 , and a groove 91 is provided on the base 9 for the fixing plate 1 to be inserted into.

[0026] When in use, the PEM water electrolysis device 5 is turned on, and the water storage box 2 enters from the water inlet 501 of the water electrolysis device and then comes out from the water outlet 502 of the water electrolysis device. The hydrogen after the water electrolysis device 5 electrolyzes water enters the hydrogen tube 3 from the hydrogen tube air inlet 302 and then comes out from the hydrogen outlet 301, and then enters the beaker 11 through one end of the U-shaped tube 63, is wrapped by soap bubbles and collected, and then the igniter 14 can be used to ignite the hydrogen in the soap bubbles, proving the generation of hydrogen. The oxygen after the water electrolysis device 5 electrolyzes water enters the oxygen tube 4 from the oxygen tube air inlet 402 and then comes out from the oxygen outlet 401, and then enters the curved tube 10 from the S-shaped tube 62. If a wooden stick with sparks is inserted into the curved tube mouth, re-ignition can be observed, proving that oxygen is generated.

[0027] The hydrogen and oxygen detection device is a third hydrogen and oxygen detection module, which includes an igniter 14, the lower end of the igniter 14 is connected to an L-shaped tube 15, the upper end of the L-shaped tube 15 is connected to the igniter 14, the lower end of the L-shaped tube 15 is connected to a detachable rubber plug 16, and the rubber plug 16 is connected to the igniter 14 through a connecting line. Two first vents and a second vent that can be connected to the hydrogen outlet 301 and the oxygen outlet 401 are respectively provided at the transverse pipeline position of the L-shaped tube 15.

[0028] The hydrogen and oxygen detection device is a third hydrogen and oxygen detection module, which includes an igniter 14, the lower end of the igniter 14 is connected to an L-shaped tube 15, the upper end of the L-shaped tube 15 is connected to the igniter 14, the lower end of the L-shaped tube 15 is connected to a detachable rubber plug 16, and the rubber plug 16 is connected to the igniter 14 through a connecting line. Two first vents 151 and second vents 152 that can be connected to the hydrogen outlet 301 and the oxygen outlet 401 are respectively provided at the transverse pipeline position of the L-shaped tube 15.

[0029] When in use, the rubber plug 16 is used to seal the lower end opening of the L-shaped tube 15, the first vent 151 is inserted into the hydrogen outlet 301, the second vent 152 is inserted into the oxygen outlet 401, and the igniter 14 switch is turned on. Oxygen and hydrogen are mixed in the L-shaped tube 15, and an explosion sound can be emitted.

[0030] The first hydrogen and oxygen detection module, the second hydrogen and oxygen detection module and the third hydrogen and oxygen detection module can be disassembled, and one of them can be selected for use according to teaching needs. Example

[0031] like Fig. 9 As shown, in Example 1 of the present invention, extension plates 19 are further provided on both sides of the plate surface of the connecting base 9, and the plate surface of the extension plates 19 is parallel to the plate surface of the connecting base 9, which can prevent the base 9 from tipping over.

Claims

1. A modular experimental device for electrolysis of water, characterized in that: The utility model comprises a fixed plate, wherein a water storage box, a hydrogen pipe and an oxygen pipe are arranged on one surface of the fixed plate, a water electrolysis device is arranged on the other surface of the fixed plate, a water inlet of the water electrolysis device and a water outlet of the water electrolysis device are connected to the water storage box, a hydrogen pipe air inlet is arranged on the upper part of the hydrogen pipe, an oxygen pipe air inlet is arranged on the upper part of the oxygen pipe, a hydrogen outlet of the water electrolysis device is connected to the hydrogen pipe air inlet, an oxygen outlet of the water electrolysis device is connected to the oxygen pipe air inlet, a water storage box water inlet is arranged on the top of the water storage box, a lower end of the hydrogen pipe is connected to the water storage box and an upper end is provided with a hydrogen outlet, a lower end of the oxygen pipe is connected to the water storage box and an upper end is provided with an oxygen outlet, a detachable hydrogen and oxygen detection device is arranged above the fixed plate, and both the hydrogen outlet and the oxygen outlet are connected to the detachable hydrogen and oxygen detection device.

2. The modular experimental device for electrolyzing water according to claim 1, characterized in that: The fixing plate, hydrogen pipe and oxygen pipe are made of transparent acrylic material.

3. The modular experimental device for electrolysis of water according to claim 1, characterized in that: The hydrogen tube and the oxygen tube are provided with scale marks on one side edge.

4. The modular experimental device for electrolyzing water according to claim 3, characterized in that: The hydrogen and oxygen detection device is a first hydrogen and oxygen detection module, which includes a hydrogen and oxygen fuel cell and a fan. The hydrogen outlet is connected to the hydrogen inlet of the hydrogen and oxygen fuel cell, the oxygen outlet is connected to the oxygen inlet of the hydrogen and oxygen fuel cell, and the hydrogen and oxygen fuel cell is connected to the fan.

5. The modular experimental device for electrolyzing water according to claim 4, characterized in that: The hydrogen and oxygen fuel cell and the fan are fixed on the first support plate, the hydrogen inlet of the hydrogen and oxygen fuel cell is connected to the first pipe, the oxygen outlet of the hydrogen and oxygen fuel cell is connected to the second pipe, the first pipe and the second pipe pass through the support plate, the first pipe can be inserted into and connected to the hydrogen outlet of the hydrogen pipe, and the second pipe can be inserted into the oxygen outlet.

6. The modular experimental device for electrolyzing water according to claim 3 or 5, characterized in that: The hydrogen and oxygen detection device is a second hydrogen and oxygen detection module, which includes an S-shaped tube and a U-shaped tube. One end of the S-shaped tube is connected to the oxygen outlet, and the other end of the S-shaped tube is sleeved with a bent tube. One end of the U-shaped tube is connected to the hydrogen outlet, and the other end of the U-shaped tube is connected to a beaker filled with soapy water. Valves are provided on both the S-shaped tube and the U-shaped tube.

7. The modular experimental device for electrolyzing water according to claim 6, characterized in that: The S-shaped tube and the U-shaped tube are fixed on the second support plate, one end of the S-shaped tube passes through the second support plate and is located below the second support plate, the other end of the S-shaped tube is located above the support plate and penetrates into the bottom of the beaker filled with soapy water, one end of the U-shaped tube passes through the second support plate and is located below the second support plate, and the other end of the S-shaped tube passes through the second support plate and is located below the second support plate.

8. The modular experimental device for electrolyzing water according to claim 3 or 7, characterized in that: The hydrogen and oxygen detection device is a third hydrogen and oxygen detection module, which includes an igniter, the lower end of the igniter is connected to an L-shaped tube, the upper end of the L-shaped tube is connected to the igniter, the lower end of the L-shaped tube is connected to a detachable rubber plug, and the rubber plug is connected to the igniter through a connecting line. Two first vents and a second vent that can be connected to a hydrogen outlet and an oxygen outlet are respectively provided at the transverse pipeline position of the L-shaped tube.

9. The modular experimental device for electrolyzing water according to claim 6, characterized in that: A detachable connecting base is provided at the bottom of the fixing plate, and a groove for inserting the fixing plate is provided on the base.

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