CN202584512U - Short circuit and fuse effect experimental device - Google Patents
Short circuit and fuse effect experimental device Download PDFInfo
- Publication number
- CN202584512U CN202584512U CN 201220152507 CN201220152507U CN202584512U CN 202584512 U CN202584512 U CN 202584512U CN 201220152507 CN201220152507 CN 201220152507 CN 201220152507 U CN201220152507 U CN 201220152507U CN 202584512 U CN202584512 U CN 202584512U
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- fuse
- resistance wire
- short circuit
- fire disaster
- effect
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Abstract
The utility model provides a short circuit and fuse effect experimental device which comprises a fuse, a light bulb and a resistance wire which are in series connection and also comprises a bracket for fixation. The short circuit and fuse effect experimental device is characterized in that: a main part of the resistance wire is spiral, an inner diameter of a spiral inner cavity of the resistance wire is larger than an outer diameter of a matchstick. The device has the following advantages: (1) when the device is connected to a low voltage power supply, the fuse is not connected, and the light bulb is short-circuited and goes out, current is increased rapidly and heat generation is obvious, after tens of seconds, a combustible matter on the resistance wire is burned, open flame and smoke are generated, and a 'miniature fire disaster' appears; (2) a severe degree of the 'miniature fire disaster' is moderate, fire hazards of short circuit is demonstrated, fear of teachers and students are avoided, and the 'miniature fire disaster' is wonderful and safe; (3) when the fuse is connected, the above 'fire disaster' does not happen, and an effect of the fuse is verified; (4) the resistance wire is suspended and fixed, and experimental devices are not burned by the 'miniature fire disaster'; (5) the structure is simple, an effect is obvious, and the device is easy to popularize.
Description
Technical field
The utility model relates to a kind of middle school electrophysics experiment teaching aid, particularly short circuit and fuse effect experimental provision.
Background technology
Short circuit experiment, fuse effect are the important experimental of junior physics; During short circuit, electric current is without electrical appliance, and electric current sharply increases; The lead heating obviously; Meeting breaking out of fire when serious, the shortcoming of existing this experimental program is: the fusing of fuse then can be avoided the generation of this type of accident, and the shortcoming of this experimental program is now:
1, if do experiment with the 220V mains lighting supply, the huge sound when following blown fuse and strong electric spark, too dangerous; If the fuse specification selects improper meeting to cause entire building to have a power failure, cause protest; Also can increase the weight of student (particularly schoolgirl) to the fear of electricity, influence follow-up study, only supply bold male teacher to select for use, forbid making student experiment in group.
2, usually with low-tension supply power supply, safe, but the bulb only can demonstrate out short circuit the time extinguishes phenomenon, experiment effect is insipid, and student's interest is low.
The utility model content
The purpose of the utility model is: a kind of short circuit and fuse effect experimental provision are provided, and with convenient, safe, " miniature fire " in the time of can repeatedly simulating short circuit, and the checking fuse can be avoided the generation of " fire ".
The technical scheme that the utility model adopted is: a kind of short circuit and fuse effect experimental provision; Comprise the fuse that is connected in series, bulb, resistance wire and the fixing support of usefulness; It is characterized in that: the main part of said resistance wire is shape in the shape of a spiral, and the internal diameter of said resistance wire helical cavity is greater than the external diameter of matchstick.
Said support is made up of base plate, the riser that is individually fixed in the base plate both sides and vertical rod, is fixed with the said bulb of serial connection, said fuse on the said riser, reaches corresponding binding post, and said resistance wire is unsettled to be fixed between said riser and the said vertical rod.
Also be fixed with the switch parallelly connected on the said riser, be placed with foam block in the outer wall of said resistance wire or the spiral inner chamber with said bulb.
The beneficial effect of the utility model is: 1, be connected to low-tension supply, do not connect fuse, with the bulb short circuit, lamp extinguishes, the hurried increase of electric current and generating heat obviously, and after tens of seconds, the combustible burning on the resistance wire produces naked light and dense smoke, occurs " miniature fire "; 2, should " miniature fire " acutely spend moderately, both demonstrated out the fire hazard of short circuit, avoided teachers and students' fear again, excellence and safety; 3, connect fuse, above-mentioned " fire " can not take place, the effect of checking fuse; 4, resistance wire is unsettled fixing, and " miniature fire " can not burn out experimental provision; 5, simple in structure, effect is remarkable, is easy to promote.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Among the figure: 1 base plate, 2 vertical rods, 3 risers, 4 switches, 5 first binding posts, 6 fuses, 7 second binding posts, 8 bulbs, 9 the 3rd binding posts, 10 resistance wires, 11 foams, 12 matchsticks, 13 nuts.
Embodiment
As shown in Figure 1; Support is made up of base plate 1, the riser 3 that is individually fixed in base plate 1 left and right sides and vertical rod 2; Be fixed with fuse 6, bulb 8, and corresponding first binding post 5, second binding post 7, the 3rd binding post 9 of series connection on the riser 3, bulb 8 belows are fixed with the switch 4 of parallel connection.The unsettled resistance wire 10 that is fixed with between riser 3 and the vertical rod 2, the main part of resistance wire 10 is shape in the shape of a spiral, and the internal diameter of this helical cavity should be much larger than the diameter of matchstick 12, with the convenient matchstick 12 that from inner chamber, picks and places.
Usage:
1, do not connect fuse: second binding post 7 is connected to low-tension supply with the external lead of vertical rod 2 usefulness, and bulb is luminous; Closing Switch 4, bulb extinguishes immediately, tens of second after, the resistance wire heating match that ignites, the match foam that ignites occurs excellent and " miniature fire " that safety is controlled.
2, deenergization, insert fuse: first binding post 5 is connected to low-tension supply with the external lead of vertical rod 2 usefulness, and bulb is luminous; Closing Switch 4, bulb extinguishes immediately, the resistance wire heating, but the fusing of fuse has stoped the generation of " miniature fire ".
Claims (3)
1. short circuit and fuse effect experimental provision; Comprise the fuse that is connected in series, bulb, resistance wire and the fixing support of usefulness; It is characterized in that: the main part of said resistance wire is shape in the shape of a spiral, and the internal diameter of said resistance wire helical cavity is greater than the external diameter of matchstick.
2. short circuit as claimed in claim 1 and fuse effect experimental provision; It is characterized in that: said support is made up of base plate, the riser that is individually fixed in the base plate both sides and vertical rod; Be fixed with the said bulb of serial connection, said fuse on the said riser, reach corresponding binding post, said resistance wire is unsettled to be fixed between said riser and the said vertical rod.
3. short circuit as claimed in claim 2 and fuse effect experimental provision is characterized in that: also be fixed with the switch parallelly connected with said bulb on the said riser, be placed with foam block in the outer wall of said resistance wire or the spiral inner chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220152507 CN202584512U (en) | 2012-04-12 | 2012-04-12 | Short circuit and fuse effect experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220152507 CN202584512U (en) | 2012-04-12 | 2012-04-12 | Short circuit and fuse effect experimental device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202584512U true CN202584512U (en) | 2012-12-05 |
Family
ID=47253900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220152507 Expired - Fee Related CN202584512U (en) | 2012-04-12 | 2012-04-12 | Short circuit and fuse effect experimental device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202584512U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103456217A (en) * | 2013-10-08 | 2013-12-18 | 熊德永 | Multifunctional short circuit demonstration device |
| CN104064087A (en) * | 2014-06-25 | 2014-09-24 | 徐晶 | Power source short circuit demonstration device |
| CN107657878A (en) * | 2017-11-16 | 2018-02-02 | 公安部四川消防研究所 | A kind of electrical fire is multiple and suppresses the demo platform of electric ignition source |
| CN112113810A (en) * | 2020-08-11 | 2020-12-22 | 中国原子能科学研究院 | High-pressure oxidation treatment device for organic samples |
-
2012
- 2012-04-12 CN CN 201220152507 patent/CN202584512U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103456217A (en) * | 2013-10-08 | 2013-12-18 | 熊德永 | Multifunctional short circuit demonstration device |
| CN103456217B (en) * | 2013-10-08 | 2016-01-06 | 熊德永 | Multifunctional short circuit demonstration device |
| CN104064087A (en) * | 2014-06-25 | 2014-09-24 | 徐晶 | Power source short circuit demonstration device |
| CN107657878A (en) * | 2017-11-16 | 2018-02-02 | 公安部四川消防研究所 | A kind of electrical fire is multiple and suppresses the demo platform of electric ignition source |
| CN107657878B (en) * | 2017-11-16 | 2019-06-28 | 公安部四川消防研究所 | A kind of electrical fire is multiple and inhibits the demo platform of electrical ignition source |
| CN112113810A (en) * | 2020-08-11 | 2020-12-22 | 中国原子能科学研究院 | High-pressure oxidation treatment device for organic samples |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20140412 |