CN219738352U

CN219738352U - Tungsten wire sublimation demonstrator

Info

Publication number: CN219738352U
Application number: CN202223392434.XU
Authority: CN
Inventors: 高桂长
Original assignee: Fujian Educational Equipment Industry Association; Fujian Nanping Jianjin Middle School; Fujian Education Equipment And Infrastructure Center
Current assignee: Fujian Educational Equipment Industry Association; Fujian Nanping Jianjin Middle School; Fujian Education Equipment And Infrastructure Center
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-09-22
Anticipated expiration: 2032-12-16

Abstract

The utility model relates to a tungsten wire sublimation demonstrator, which comprises a power supply, a switch, a test bulb assembly and an adjustable resistor which are connected in series, wherein a group of control bulbs which are arranged in parallel with the test bulb assembly are arranged; in the research teaching process, the experimental effect is obvious, the change of the bulb after the tungsten wire sublimates is visually seen, the visibility is good, and the teaching effect is improved; enriches the perceptual knowledge of students and enables the students to visually observe the phenomenon of blackening of the bulb.

Description

Tungsten wire sublimation demonstrator

Technical Field

The utility model relates to a tungsten wire sublimation demonstrator, and belongs to the technical field of teaching equipment.

Background

In junior middle school physical sublimation and desublimation teaching, there are many examples of sublimation and desublimation phenomena involved, and sublimation and desublimation of tungsten filaments are very classical examples. However, in modern life, most families replace incandescent lamps with energy-saving lamps or LED lamps, so that no intuitive life experience is provided, and students do not have a visual experience of the phenomenon of sublimation and desublimation of tungsten wires.

Therefore, in order to enrich the perceptual knowledge of students, the students can visually observe the phenomenon that the bulb turns black.

Disclosure of Invention

The utility model aims to provide a tungsten wire sublimation demonstrator to solve the problem that students can intuitively observe the blackening phenomenon of a bulb in the background technology.

The technical scheme of the utility model is as follows:

the tungsten wire sublimation demonstrator comprises a power supply, a switch, a test bulb assembly and an adjustable resistor which are connected in series, and a group of control bulbs which are arranged in parallel with the test bulb assembly are arranged.

Preferably, the switch, test bulb assembly, control bulb and adjustable resistor are all mounted on the display stand.

Preferably, the test bulb assembly includes a lamp socket and a test bulb detachably mounted to the lamp socket.

Preferably, the control bulb is fixedly mounted on the display stand.

Preferably, a timer is also provided in electrical connection with the switch.

Preferably, a protective cover made of transparent materials is hinged to the display frame and used for covering the test bulb assembly.

Preferably, an electromagnet is embedded in the display frame, the electromagnet is electrically connected with the switch in parallel, and a magnetic part attracted by electromagnetic ferromagnetism is arranged on the protective cover.

The utility model has the following beneficial effects:

the experimental equipment has low cost, simple device assembly and easy operation. The experimental device has strong operability and high experimental success rate.

In the research teaching process, the experimental effect is obvious, the change of the bulb after the tungsten wire sublimates is visually seen, the visibility is good, and the teaching effect is improved; enriches the perceptual knowledge of students and enables the students to visually observe the phenomenon of blackening of the bulb.

Drawings

FIG. 1 is a front view of the structure of the present utility model;

FIG. 2 is a rear view of the structure of the object of the present utility model;

FIG. 3 is a circuit diagram of the present utility model;

fig. 4 is a circuit diagram of the present utility model.

The reference numerals in the drawings are as follows:

1. a display rack; 2. testing the bulb assembly; 21. a lamp holder; 22. testing the bulb; 3. a control bulb; 4. a switch; 5. an adjustable resistor; 6. a protective cover; 7. a timer; 8. an electromagnet.

Detailed Description

The utility model will now be described in detail with reference to the drawings and to specific embodiments.

As shown in fig. 1-4:

the test bulb component 2 and the comparison bulb 3 are respectively provided with bulbs with E12 screw holes of 6V3W and are arranged on the front side wall of the display frame 1 in parallel, the adjustable resistor 5 is provided with a disc resistor on the rear side wall of the display frame 1, and the power supply is a direct current power supply with the maximum voltage of 16V. The switch 4 and the timer 7 are arranged on the front side wall of the display frame 1; the upper end of the transparent protective cover 6 is hinged with the upper end of the display stand 1 through a hinge.

Working principle:

switching on a direct current power supply, and enabling the test bulb assembly 2 to emit light;

the resistance of the adjustable resistor 5 is adjusted to operate the test bulb assembly 2 beyond the rated power.

After waiting for 1 minute, turning off the direct current power supply, and observing the test bulb assembly 2 and the control bulb 3; so as to visually observe the difference before and after sublimation of the tungsten filament.

The reference bulb 3 is relatively fixedly mounted on the display stand 1 corresponding to the test bulb assembly 2 which does not operate beyond a fixed power.

The test bulb assembly 2 includes a lamp socket 21 and a test bulb 22 that requires replacement when the test bulb 22 is operated beyond its rated power for a second test.

Because the test bulb assembly 2 has higher working temperature beyond rated power and is easy to be dangerous if being touched carelessly, the test bulb assembly is covered by the protective cover 6 in a working area and isolated from the outside, thereby protecting surrounding personnel; the protective cover 6 is made of transparent material, so that the surrounding personnel can not be prevented from directly observing the protective cover by naked eyes.

If the test bulb assembly 2 is too long to work beyond rated power, the test bulb assembly is easy to burn; therefore, the timer 7 controls the switch 4 to be turned off at regular time, so that the user is prevented from forgetting to turn off the switch 4; the user can adjust the timing time of the timer 7 according to the requirement.

An electromagnet 8 is embedded in the early showing stand 1, the electromagnet 8 is connected with the adjustable resistor 5 or the test bulb assembly 2 in parallel, and when the switch 4 is closed and the test bulb assembly 2 is electrified to emit light, the electromagnet 8 also generates magnetism along with the electrification; permanent magnets (not shown in the drawing) are embedded in the protective cover 6, and the permanent magnets are just attracted with the electromagnet 8 when the protective cover 6 covers the test bulb assembly 2.

Therefore, the protection cover 6 is firmly absorbed by the attraction and matching of the electromagnet 8 and the permanent magnet in the process of working the test bulb assembly 2 beyond the rated power, and the danger caused by the fact that surrounding personnel carelessly open the protection cover 6 to contact the test bulb assembly 2 is avoided.

After the switch 4 is opened, the electromagnet 8 loses magnetism following the opening, and the protective cover 6 can be opened or closed at will.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. Tungsten filament sublimation demonstrator, its characterized in that: the bulb test device comprises a power supply, a switch (4), a test bulb assembly (2) and an adjustable resistor (5) which are connected in series, wherein a group of control bulbs (3) which are arranged in parallel with the test bulb assembly (2) are arranged;

a protective cover (6) made of transparent materials is hinged to the display frame (1), and the protective cover (6) is used for covering the test bulb assembly (2);

an electromagnet (8) is embedded in the showing stand (1), the electromagnet (8) is electrically connected with the switch (4) in parallel, and a magnetic piece attracted with the electromagnet (8) is arranged on the protective cover (6).

2. A tungsten filament sublimation demonstration apparatus as set forth in claim 1, wherein: the switch (4), the test bulb assembly (2), the comparison bulb (3) and the adjustable resistor (5) are all arranged on the display frame (1).

3. A tungsten filament sublimation demonstration apparatus as set forth in claim 2, wherein: the test bulb assembly (2) comprises a lamp holder (21) and a test bulb (22), and the test bulb (22) is detachably mounted on the lamp holder (21).

4. A tungsten filament sublimation demonstration apparatus as set forth in claim 3, wherein: the comparison bulb (3) is fixedly arranged on the showing stand (1).

5. A tungsten filament sublimation demonstration apparatus as set forth in claim 3, wherein: a timer (7) is also provided, which is electrically connected to the switch (4).