Current demonstration device

Abstract

The utility model discloses a current demonstration device, which comprises a lower box body, four demonstration boards are detachably arranged above the lower box body, and each demonstration board is respectively provided with respective electric equipment capable of displaying the current direction or intensity and a water flow movement device capable of displaying the current direction to be consistent with the current direction; a peristaltic pump is arranged at the bottom of the lower box body, a water storage device is arranged on the outer side of the lower box body, a battery pack and an external power socket are arranged in the lower box body, and a positive electrode of a power output connector is sequentially connected with the peristaltic pump, a reversible switch, a knob type slide rheostat and electric equipment and then returns to a negative electrode of the power output connector; an outlet of the peristaltic pump is connected with a water storage device, an outlet of the water storage device is connected with a right loose joint pipe through the lower section of a water inlet pipe, and an inlet of the peristaltic pump is connected with a left loose joint pipe through the lower section of a water return pipe. The device is simple in operation, complete in function and reasonable in circuit design, and can effectively improve the teaching efficiency and effect.

Description

Technical Field

[0001] The utility model relates to the technical field of physics teaching demonstration devices, in particular to an electric current demonstration device. Background Art

[0002] At present, some existing current demonstration devices mainly have the following problems: 1. The conversion between the same direction current and the reverse current usually requires the use of an adapter, which not only increases the complexity of the operation, but also may waste precious classroom time and affect the teaching efficiency. Students are also easily confused by the cumbersome steps during the operation, which reduces the learning effect. 2. Some existing current demonstrators can only demonstrate a single current interaction phenomenon, such as only showing the attraction of the same direction current or the repulsion of the reverse current. If other types of experiments are required, teachers may need to replace the entire experimental device. This design limits the flexibility of teaching and cannot meet the diverse teaching needs. 3. Some existing current demonstrators appear to be more casual when connecting the lines by themselves, and the circuit design is not reasonable enough. This not only affects the observation effect of the experimental phenomenon, but also may interfere with the main experimental phenomenon, reducing the accuracy of the experiment and the teaching effect. In addition, the complex circuit design increases the possibility of device failure and affects the stability and reliability of the equipment. Therefore, it is necessary to develop a current demonstration device that is simple to operate, fully functional, and reasonably designed to improve the efficiency and effect of teaching. Utility Model Content

[0003] The utility model aims to provide a current demonstration device which is simple to operate, has complete functions and reasonable circuit design so as to improve the efficiency and effect of teaching.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electric current demonstration device, comprising a lower box body, a display board is detachably provided on the upper part of the lower box body, and four display boards are provided, namely, a first display board, a second display board, a third display board and a fourth display board, each display board can be replaced and used alternately, and each display board is provided with its own electrical equipment capable of displaying the direction or strength of the electric current and a water flow motion device capable of displaying the direction consistent with the electric current; a peristaltic pump is provided at the bottom of the lower box body, a water storage tank is provided on the outer side of the lower box body, and a battery pack is provided on the other side of the lower box body. An external power socket is provided below the battery pack, and a power output connector is provided at the other end of the external power socket. The positive pole of the power output connector is connected to the peristaltic pump, the forward / reverse switch, the knob-type sliding rheostat and the electrical equipment in sequence and then returns to the negative pole of the power output connector. Pointer voltmeters are connected in parallel at both ends of the electrical equipment. The outlet of the peristaltic pump is connected to the water storage tank through a circulation pipe, and the outlet of the water storage tank is connected to the right flexible pipe through the lower section of the water inlet pipe, and the inlet of the peristaltic pump is connected to the left flexible pipe through the lower section of the return pipe, and the left flexible pipe and the right flexible pipe are respectively connected to water flow movement devices that can display the direction consistent with the current.

[0005] Furthermore, a first water flow movement device and a light bulb are installed on the first display board. The first water flow movement device includes a first water inlet pipe upper section and a first water return pipe upper section. The inlet of the first water inlet pipe upper section is connected to the right-side flexible pipe, and the outlet is connected to the first water return pipe upper section through a first pipe joint. The outlet of the first water return pipe upper section is connected to the left-side flexible pipe; the positive and negative poles of the light bulb are respectively connected to the positive and negative poles of the power output connector.

[0006] Further, a second water flow motion device, a first light emitting diode and a second light emitting diode are installed on the second display board. The second water flow motion device includes a second water inlet pipe upper section and a second water return pipe upper section. The inlet of the second water inlet pipe upper section is connected to the right flexible pipe, and the outlet is connected to the right tee pipe. The other two outlets of the right tee pipe are respectively connected to the upper right short pipe and the lower right short pipe. The outlet of the second water return pipe upper section is connected to the left flexible pipe, and the inlet is respectively connected to the left tee pipe. The other two inlets of the left tee pipe are respectively connected to the upper left short pipe and the lower left short pipe. The upper left short pipe is connected to the upper right short pipe through an upper pipe joint, and the lower left short pipe is connected to the lower right short pipe through a lower pipe joint.

[0007] The positive electrode and negative electrode of the first light emitting diode are connected to the positive electrode and negative electrode of the power output connector respectively, and the positive electrode and negative electrode of the second light emitting diode are connected to the negative electrode and positive electrode of the power output connector respectively.

[0008] Furthermore, a third water flow motion device and a fan are provided on the third display board, and the third water flow motion device includes a third water return pipe upper section and a third water inlet pipe upper section, the inlet of the third water inlet pipe upper section is connected to the right-side flexible pipe, the outlet of the third water return pipe upper section is connected to the left-side flexible pipe, and the third water inlet pipe upper section and the third water return pipe upper section are connected through a third pipe joint; the positive and negative poles of the fan are respectively connected to the positive and negative poles of the power output joint.

[0009] Furthermore, a fourth water flow movement device is provided on the fourth display board, and the fourth water flow movement device includes a fourth water return pipe upper section, a fourth water inlet pipe upper section and a spiral tube, the inlet of the fourth water inlet pipe upper section is connected to the right-side flexible tube, the outlet of the fourth water return pipe upper section is connected to the left-side flexible tube, and the fourth water inlet pipe upper section and the fourth water return pipe upper section are connected by a spiral tube.

[0010] Furthermore, a base is provided at the bottom of the first display board, the second display board, the third display board and the fourth display board, and the structure of the lower box is a cube or a rectangular structure with an open top, and the inner diameter of the base is larger than the size of the top opening of the lower box, so that the base can be buckled in the top opening of the lower box.

[0011] Furthermore, the circulation pipe is connected to the water storage tank via a first three-way pipe, and another outlet of the first three-way pipe is connected to a drain valve.

[0012] The beneficial effects of the utility model are:

[0013] 1. The utility model adds a forward and reverse switch to the display device circuit, making the conversion between the same direction current and the reverse direction current more convenient, significantly reducing the operation steps and saving classroom time.

[0014] 2. The utility model can demonstrate a variety of different current phenomena to meet different teaching needs, thereby improving the flexibility of teaching. The current demonstrator can not only show the direction and magnitude of the current, but also demonstrate the energy conversion process. If another experiment is needed, only part of the experimental device needs to be replaced, without replacing the entire device. This design greatly improves the adaptability and practicality of the experimental equipment.

[0015] 3. The utility model adopts a transparent shell design so that the operating status of the internal circuit is clear at a glance, which is convenient for observation and teaching. In addition, the reasonable circuit design not only improves the accuracy of the experimental phenomenon, but also enhances the durability and reliability of the device and reduces the failure rate.

[0016] 4. The current demonstration device disclosed in the utility model overcomes the defects of the prior art by improving the ease of operation, functional diversity and rationality of circuit design, and can better serve teaching practice and improve the quality and effect of physical experiment teaching. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 is a structural schematic diagram of a second display board;

[0019] Figure 3 is a structural schematic diagram of the third display board;

[0020] Figure 4 is a structural schematic diagram of the fourth display board;

[0021] Figure 5 This is the circuit structure principle diagram of the utility model;

[0022] Figure 1 Middle: 1-external power socket, 2-power output connector, 3-battery pack, 41-peristaltic pump, 42-lower section of return pipe, 43-lower section of inlet pipe, 44-circulation pipe, 45-water reservoir, 46-first three-way pipe, 47-drain valve, 5-pointer voltmeter, 6-lower box, 7-knob sliding rheostat, 81-left flexible pipe, 82-right flexible pipe, 9-forward and reverse switch, 11-first display board, 12-first upper section of return pipe, 13-first upper section of inlet pipe, 14-light bulb, 15-first pipe joint;

[0023] Figure 2 Middle: 21-second display board, 22-upper section of second water return pipe, 23-upper section of second water inlet pipe, 24-left three-way pipe, 25-lower left short pipe, 26-upper left short pipe, 27-right three-way pipe, 28-lower right short pipe, 29-upper right short pipe, 210-upper pipe joint, 211-lower pipe joint, 212-second light emitting diode, 213-first light emitting diode;

[0024] Figure 3 Middle: 31-third display board, 32-upper section of third water return pipe, 33-upper section of third water inlet pipe, 34-third pipe joint, 35-fan;

[0025] Figure 4 Middle: 51-the fourth display board, 52-the upper section of the fourth return pipe, 53-the upper section of the fourth inlet pipe, 54-the spiral pipe. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1 A current demonstration device includes a lower box body 6, a display board is detachably provided on the upper part of the lower box body 6, and four display boards are provided, namely a first display board 11, a second display board 21, a third display board 31 and a fourth display board 51, each display board can be replaced and used alternately, and each display board is provided with its own electrical equipment that can display the direction or strength of the current and a water flow motion device that can display the direction of the current to be consistent; a peristaltic pump 41 is provided at the bottom of the lower box body 6, a water reservoir 45 is provided on the outer side of the lower box body 6, a battery pack 3 is provided on the other side of the lower box body 6, and an external power socket 1 is provided below the battery pack 3, A power output connector 2 is provided at the other end of the external power socket 1, the positive pole of the power output connector 2 is connected to the peristaltic pump 41, the forward / reverse switch 9, the knob-type sliding rheostat 7 and the electrical equipment in sequence and then returns to the negative pole of the power output connector 2, and a pointer voltmeter 5 is connected in parallel at both ends of the electrical equipment; the outlet of the peristaltic pump 41 is connected to the water reservoir 45 through the circulation pipe 44, the outlet of the water reservoir 45 is connected to the right-side flexible pipe 82 through the lower section of the water inlet pipe 43, the inlet of the peristaltic pump 41 is connected to the left-side flexible pipe 81 through the lower section of the return pipe 42, and the left-side flexible pipe 81 and the right-side flexible pipe 82 are respectively connected to water flow movement devices that can display the direction consistent with the current.

[0028] See also Figure 1A first water flow motion device and a light bulb 14 are installed on the first display board 11. The first water flow motion device includes a first water inlet pipe upper section 13 and a first water return pipe upper section 12. The inlet of the first water inlet pipe upper section 13 is connected to the right flexible pipe 82, and the outlet is connected to the first water return pipe upper section 12 through a first pipe joint 15. The outlet of the first water return pipe upper section 12 is connected to the left flexible pipe 81; the positive and negative poles of the light bulb 14 are respectively connected to the positive and negative poles of the power output connector 2.

[0029] See also Figure 2 The second display board 21 is provided with a second water flow motion device, a first light emitting diode 213 and a second light emitting diode 212. The second water flow motion device comprises a second water inlet pipe upper section 23 and a second water return pipe upper section 22. The inlet of the second water inlet pipe upper section 23 is connected to the right flexible pipe 82, and the outlet is connected to the right tee pipe 27. The other two outlets of the right tee pipe 27 are respectively connected to the upper right short pipe 29 and the lower right short pipe 28. The outlet of the second water return pipe upper section 22 is connected to the left flexible pipe 81, and the inlet is respectively connected to the left tee pipe 24. The other two inlets of the left tee pipe 24 are respectively connected to the upper left short pipe 26 and the lower left short pipe 25. The upper left short pipe 26 is connected to the upper right short pipe 29 through an upper pipe joint 210, and the lower left short pipe 25 is connected to the lower right short pipe 28 through a lower pipe joint 211.

[0030] The positive electrode and negative electrode of the first light emitting diode 213 are connected to the positive electrode and negative electrode of the power output connector 2 respectively, and the positive electrode and negative electrode of the second light emitting diode 212 are connected to the negative electrode and positive electrode of the power output connector 2 respectively.

[0031] See also Figure 3 A third water flow motion device and a fan 35 are provided on the third display board 31. The third water flow motion device includes a third water return pipe upper section 32 and a third water inlet pipe upper section 33. The inlet of the third water inlet pipe upper section 33 is connected to the right flexible pipe 82, and the outlet of the third water return pipe upper section 32 is connected to the left flexible pipe 81. The third water inlet pipe upper section 33 and the third water return pipe upper section 32 are connected through a third pipe joint 34; the positive and negative poles of the fan 35 are respectively connected to the positive and negative poles of the power output joint 2.

[0032] See also Figure 4 A fourth water flow motion device is provided on the fourth display board 51, and the fourth water flow motion device includes a fourth return pipe upper section 52, a fourth water inlet pipe upper section 53 and a spiral tube 54. The inlet of the fourth water inlet pipe upper section 53 is connected to the right-side flexible tube 82, and the outlet of the fourth return pipe upper section 52 is connected to the left-side flexible tube 81. The fourth water inlet pipe upper section 53 and the fourth return pipe upper section 52 are connected via a spiral tube 54.

[0033] The bottoms of the first display board 11, the second display board 21, the third display board 31 and the fourth display board 51 are all provided with bases. The structure of the lower box body 6 is a cube or a rectangular parallelepiped structure with an open top. The inner diameter of the base is larger than the size of the top opening of the lower box body 6, so that the base can be buckled in the top opening of the lower box body 6.

[0034] The circulation pipe 44 is connected to the water storage tank 45 via a first three-way pipe 46 , and another outlet of the first three-way pipe 46 is connected to a drain valve 47 .

[0035] When the utility model is used, the first, second, third and fourth display boards can be replaced as needed. When the first display board 11 is demonstrated, the inlet of the first water inlet pipe upper section 13 can be connected to the right flexible pipe 82, and the outlet of the first water return pipe upper section 12 can be connected to the left flexible pipe 81, and then the positive and negative poles of the light bulb 14 are connected to the positive and negative poles of the power output connector 2, and the forward and reverse switch 9 is pressed to the positive pole side, and the light bulb 14 can be seen to light up, and the peristaltic pump 41 starts to work to extract water (with color) from the water storage 45 and flow along the water inlet pipe lower section 43, the first water inlet pipe upper section 13, the first water return pipe upper section 12, and the water return pipe lower section 42. At this time, the current can be adjusted by rotating the knob sliding rheostat 7, so that the light bulb 14 can be brighter or darker, and the speed of the water flow can be seen with the change of the brightness of the light bulb 14; when the forward and reverse switch 9 is pressed to the negative pole side, the water flow moves in the opposite direction, and the change of the water flow direction can be intuitively displayed.

[0036] When the second display board 21 is used, the inlet of the second water inlet pipe upper section 23 is connected to the right flexible pipe 82, and the outlet of the second water return pipe upper section 22 is connected to the left flexible pipe 81, and then the positive and negative electrodes of the first light-emitting diode 213 are respectively connected to the positive and negative electrodes of the power output connector 2, and the positive and negative electrodes of the second light-emitting diode 212 are respectively connected to the negative and positive electrodes of the power output connector 2. At this time, the forward and reverse switch 9 is pressed to the positive side, and according to the principle of unidirectional conduction of the diode, the first light-emitting diode 213 connected to the positive electrode of the power output connector 2 is powered and lit, and the water flows from the positive to the negative electrode; if the forward and reverse switch 9 is pressed to the negative side, the second light-emitting diode 212 connected to the negative electrode of the power output connector 2 will light up, and the water flows from the negative to the positive electrode.

[0037] When using the third display board 31, connect the inlet of the third water inlet pipe upper section 33 to the right flexible pipe 82, connect the outlet of the third water return pipe upper section 32 to the left flexible pipe 81, and connect the positive and negative poles of the fan 35 to the positive and negative poles of the power output connector 2 respectively. Press the forward / reverse switch 9 to the positive side, and you can see that the fan 35 starts to rotate forward, and the flow direction of the water is consistent with the direction of the fan 35; if you press the forward / reverse switch 9 to the negative side, the opposite effect will occur. Similarly, you can also adjust the current by rotating the knob-type sliding rheostat 7 to see the changes in the speed of the fan 35 and the changes in the speed of the water flow.

[0038] When the fourth display board 51 is used, the direction of the water flow is consistent with the direction of the current by adjusting the forward and reverse switch 9. Similarly, the magnitude of the current can be adjusted by rotating the knob-type sliding rheostat 7 to see the change in the speed of the water flow.

[0039] The utility model is designed with internal power supply and external power supply, and outputs 0-6V power supply to power the electrical equipment (bulb 14, peristaltic pump 41, light emitting diode, etc.) through the voltage regulating module, and connects to the pointer voltmeter to accurately measure the voltage. The peristaltic pump 41 is used to push the liquid to form fluidity, and the check valve is connected to simulate the unidirectional conductivity of the light emitting diode; the forward and reverse switch is connected to change the positive and negative poles of the output power supply.

[0040] The key points of the current demonstrator are the scientific nature of its design principle, the rationality of its structural features, and the intuitiveness and interest of the experimental demonstration effect. By continuously optimizing and improving these key points, the teaching effect and practicality of the current demonstrator can be further improved.

Claims

1. A current demonstration device, characterized in that: The invention comprises a lower box body (6), wherein a display board is detachably provided on the upper part of the lower box body (6), wherein four display boards are provided, namely a first display board (11), a second display board (21), a third display board (31) and a fourth display board (51), wherein each display board can be replaced and used alternately, and each display board is provided with an electrical device capable of displaying the direction or strength of an electric current and a water flow motion device capable of displaying a water flow consistent with the direction of the electric current; a peristaltic pump (41) is provided at the bottom of the lower box body (6), a water storage tank (45) is provided on the outer side of the lower box body (6), a battery pack (3) is provided on the other side of the interior of the lower box body (6), an external power socket (1) is provided below the battery pack (3), and the external power socket (1) is connected to the battery pack (3). The other end is provided with a power output connector (2), the positive electrode of the power output connector (2) is connected to the peristaltic pump (41), the forward / reverse switch (9), the knob-type sliding rheostat (7) and the electrical equipment in sequence and then returns to the negative electrode of the power output connector (2), and a pointer-type voltmeter (5) is connected in parallel at both ends of the electrical equipment; the outlet of the peristaltic pump (41) is connected to the water storage tank (45) through the circulation pipe (44), the outlet of the water storage tank (45) is connected to the right flexible pipe (82) through the lower section of the water inlet pipe (43), the inlet of the peristaltic pump (41) is connected to the left flexible pipe (81) through the lower section of the water return pipe (42), and the left flexible pipe (81) and the right flexible pipe (82) are respectively connected to a water flow motion device that can display the direction consistent with the current.

2. A current demonstration device according to claim 1, characterized in that: A first water flow movement device and a light bulb (14) are mounted on the first display board (11). The first water flow movement device comprises a first water inlet pipe upper section (13) and a first water return pipe upper section (12). The inlet of the first water inlet pipe upper section (13) is connected to the right flexible pipe (82), and the outlet is connected to the first water return pipe upper section (12) via a first pipe joint (15). The outlet of the first water return pipe upper section (12) is connected to the left flexible pipe (81). The positive and negative poles of the light bulb (14) are respectively connected to the positive and negative poles of the power output connector (2).

3. A current demonstration device according to claim 1, characterized in that: A second water flow motion device, a first light emitting diode (213) and a second light emitting diode (212) are installed on the second display board (21). The second water flow motion device comprises a second water inlet pipe upper section (23) and a second water return pipe upper section (22). The inlet of the second water inlet pipe upper section (23) is connected to the right flexible pipe (82), and the outlet is connected to the right tee pipe (27). The other two outlets of the right tee pipe (27) are respectively connected to the upper right short pipe (29) and the lower right short pipe (28). The outlet of the second water return pipe upper section (22) is connected to the left flexible pipe (81), and the inlet is respectively connected to the left tee pipe (24). The other two inlets of the left tee pipe (24) are respectively connected to the upper left short pipe (26) and the lower left short pipe (25). The upper left short pipe (26) is connected to the upper right short pipe (29) via an upper pipe joint (210), and the lower left short pipe (25) is connected to the lower right short pipe (28) via a lower pipe joint (211). The positive electrode and negative electrode of the first light-emitting diode (213) are respectively connected to the positive electrode and negative electrode of the power output connector (2), and the positive electrode and negative electrode of the second light-emitting diode (212) are respectively connected to the negative electrode and positive electrode of the power output connector (2).

4. A current demonstration device according to claim 1, characterized in that: A third water flow motion device and a fan (35) are provided on the third display board (31). The third water flow motion device comprises a third water return pipe upper section (32) and a third water inlet pipe upper section (33). The inlet of the third water inlet pipe upper section (33) is connected to the right flexible pipe (82), and the outlet of the third water return pipe upper section (32) is connected to the left flexible pipe (81). The third water inlet pipe upper section (33) and the third water return pipe upper section (32) are connected via a third pipe joint (34). The positive pole and the negative pole of the fan (35) are respectively connected to the positive pole and the negative pole of the power output joint (2).

5. The current demonstration device according to claim 1, characterized in that: A fourth water flow movement device is provided on the fourth display board (51), and the fourth water flow movement device comprises a fourth water return pipe upper section (52), a fourth water inlet pipe upper section (53) and a spiral tube (54); the inlet of the fourth water inlet pipe upper section (53) is connected to the right flexible tube (82), the outlet of the fourth water return pipe upper section (52) is connected to the left flexible tube (81), and the fourth water inlet pipe upper section (53) and the fourth water return pipe upper section (52) are connected via the spiral tube (54).

6. A current demonstration device according to claim 1, characterized in that: The first display board (11), the second display board (21), the third display board (31) and the fourth display board (51) are all provided with bases at the bottom. The structure of the lower box (6) is a cube or a rectangular parallelepiped structure with an open top. The inner diameter of the base is larger than the size of the top opening of the lower box (6), so that the base can be buckled in the top opening of the lower box (6).

7. The current demonstration device according to claim 1, characterized in that: The circulation pipe (44) and the water storage tank (45) are connected via a first three-way pipe (46), and the other outlet of the first three-way pipe (46) is connected to a drainage valve (47).

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