CN102236997A - Short circuit experiment instrument - Google Patents
Short circuit experiment instrument Download PDFInfo
- Publication number
- CN102236997A CN102236997A CN2010101623711A CN201010162371A CN102236997A CN 102236997 A CN102236997 A CN 102236997A CN 2010101623711 A CN2010101623711 A CN 2010101623711A CN 201010162371 A CN201010162371 A CN 201010162371A CN 102236997 A CN102236997 A CN 102236997A
- Authority
- CN
- China
- Prior art keywords
- short circuit
- bulb
- transparent tube
- experiment instrument
- shape pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention discloses a short circuit experiment instrument which comprises a bulb and a resistance wire which is connected in series with the bulb. The short circuit experiment instrument is characterized in that: the resistance wire is traversed through a transparent tube with openings at two ends; the two ends of the transparent tube are sleeved with soft plugs which are used for sealing; a side of the transparent tube is connected with a U shaped tube; the U shaped tube is equipped with colored liquid; the bulb is a low voltage bulb; after a short circuit, the bulb is put out, and air in the transparent tube is heated by the resistance wire so as to push a liquid level of the U shaped tube to rise. The invention has the following advantages that: because of adopting a low voltage power supply, security is high, student interests can be raised and fear of electricity is not aggravated; by using a principle that the air expands when heated, rising phenomenon of the liquid level in the U shaped tube is obvious and visibility is good; phenomenon differences existing before and after the short circuit is substantial, which can fully illustrate that current rapidly changes during the short circuit so that the students can be impressed; structure is simple, costs are low; the short circuit experiment instrument is suitable for popularization.
Description
Affiliated technical field
The present invention relates to the teaching aid that a kind of physics teaching in secondary school is used, particularly the short circuit experiment instrument
Background technology
Short circuit experiment is the important experiment in the junior physics electricity, and during short circuit, electric current is without electrical appliance, and only passes through lead, and lead is with heating up, and even breaking out of fire.The difficult point of student on understanding is: during partial short-circuit, whether electric current directly flows through from lead without electrical appliance; During short circuit, no current in the electrical appliance, why with lead that electrical appliance is connected in electric current can sharply increase on the contrary?
Existing experimental program is: incandescent lamp bulb and fuse are connected in the lighting circuit, when bulb side directly is communicated with by short-circuit line, bulb does not work and with the disconnected sound of the fuse of strong electric arc flame and little sound, the shortcoming of this experiment is: the one, because of dangerous and explosive (generation electric arc), the teacher is afraid to do sth, even avoids and not doing; The 2nd, the pavid psychology (particularly schoolgirl) that " loud noise, the strong electric lonely flame with a loud crash " in the experiment can the aggravation student causes the student that there is the feared state of mind in other Experiments of Electricity operation; The 3rd, improper in the experiment if the fuse specification is selected, can cause whole teaching building to have a power failure; The 4th, the lead heating in the time of can't demonstrating short circuit.Therefore, this experiment should not be demonstrated on the classroom, forbids making grouping experiment.
Another experimental program is that the mains lighting supply with 220V changes low-tension supply into and does experiment, security lifting, phenomenon are no longer violent, the needs that are suitable for imparting knowledge to students, but still there is a shortcoming: the one, the lead heating situation when showing short circuit with still failing visual pattern, reason is that the lead heating should not can not reach red vehement state, and this heating is invisible; Be anti-scald, can not make certain student touch again with hand.The 2nd, phenomenon is too gentle, and the electric current of student during to short circuit sharply increases, the perceptual knowledge of lead heating is not dark, causes the student not enough to the understanding of short circuit harm, causes the generation probability of short circuit accident to increase in life, experiment, work, and be very harmful.
Summary of the invention
The objective of the invention is: a kind of safe, easy to operate, obvious, interesting strong short circuit experiment instrument of heating phenomenon is provided.
The technical solution adopted in the present invention is: a kind of short circuit experiment instrument, the resistance wire of comprise bulb, connecting with bulb, it is characterized in that: described resistance wire passes from the transparent tube of both ends open, the two ends of this transparent tube are socketed with the cork of sealing usefulness, the side of this transparent tube also is communicated with " U " shape pipe, in described " U " shape pipe coloured liquid is housed.
Described bulb is that rated voltage is several volts to tens volts a low voltage bulb, as autobulb.
After adopting said structure, only need it is connected to low-tension supply, bulb is luminous, and the electric current by resistance wire is a normal current, and thermal effect is not obvious, even after several minutes, the liquid level in " U " shape pipe is still equal substantially.If with the bulb short circuit, then bulb extinguishes with short-circuit line at once, the electric current by resistance wire enlarges markedly, and resistance wire is to the air heat in the transparent tube, and the liquid level that promotes behind the air expansion in " U " shape pipe rises.Can infer the heating situation of resistance wire from the lifting height of " U " shape intraluminal fluid face.
The invention has the beneficial effects as follows: adopt low-tension supply, safe, can improve student's interest, can not aggravate the fear of student again to electricity; Utilize the air expanded by heating to promote " U " shape intraluminal fluid face and rise, phenomenon is obvious, visibility is big; Phenomenon significant difference before and after the short circuit, the hurried change of the electric current when proving absolutely short circuit is big, and is with deep impression, simple in structure, cost is low, be beneficial to popularization.
Description of drawings
Fig. 1 is a plan view of the present invention;
Among the figure: 1. base, 2. binding post, 3. resistance wire, 4. cork, 5. transparent tube, 6. " U " shape pipe, 7. liquid, 8. fuse, 9. bulb, 10. erect plate.
Embodiment
As shown in Figure 1, be fixed with erect plate 10 above the base 1, be fixed with 4 binding posts 2 on the erect plate successively, 4 connecting columns are respectively binding post A, B, C, D, be used to connect resistance wire 3 between binding post A, the B, be used to connect fuse 8 between binding post B, the C, be connected with bulb 9 between binding post C, the D, bulb 9 be fixed on erect plate 10 above.
Connected mode between transparent tube 5 and " U " shape pipe 6 has: (junction is connected by high temperature melting for as shown in Figure 1 fixedly connected; Or by the bonding agent connection), also can couple together by emulsion tube connected mode commonly used in the chemical experiment device.
Short-circuit line is an other independent lead (not drawing among the figure).This short-circuit line also can be fixed on above the erect plate with bulb in parallel, only need switch of series connection on short-circuit line, when switch closure, short-circuit line is with the bulb short circuit, when switch disconnected, short-circuit line is place in circuit not, and bulb is normally luminous, because of the fixed short circuit mode in parallel of this kind is a known technology, so the expression of not drawing again.
Claims (5)
1. short circuit experiment instrument, the resistance wire of comprise bulb, connecting with bulb, it is characterized in that: described resistance wire passes from the transparent tube of both ends open, the two ends of this transparent tube are socketed with the cork of sealing usefulness, the side of this transparent tube also is communicated with " U " shape pipe, in described " U " shape pipe coloured liquid is housed.
2. short circuit experiment instrument as claimed in claim 1 is characterized in that: described bulb is that rated voltage is several volts to tens volts a low voltage bulb.
3. short circuit experiment instrument as claimed in claim 2 is characterized in that: described " U " shape pipe is fixedly connected on the middle part, side of transparent tube, and " U " shape pipe is connected by high temperature melting with the junction of transparent tube.
4. short circuit experiment instrument as claimed in claim 2 is characterized in that: described " U " shape pipe is fixedly connected on the middle part, side of transparent tube, and " U " shape pipe is connected by bonding agent with the junction of transparent tube.
5. short circuit experiment instrument as claimed in claim 2 is characterized in that: described " U " shape pipe is fixedly connected on the middle part, side of transparent tube, and " U " shape pipe is connected with the sebific duct that passes through of transparent tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101623711A CN102236997A (en) | 2010-05-05 | 2010-05-05 | Short circuit experiment instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101623711A CN102236997A (en) | 2010-05-05 | 2010-05-05 | Short circuit experiment instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102236997A true CN102236997A (en) | 2011-11-09 |
Family
ID=44887608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101623711A Pending CN102236997A (en) | 2010-05-05 | 2010-05-05 | Short circuit experiment instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102236997A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103456217A (en) * | 2013-10-08 | 2013-12-18 | 熊德永 | Multifunctional short circuit demonstration device |
| CN105702141A (en) * | 2016-04-21 | 2016-06-22 | 国网江苏省电力公司职业技能训练基地 | Live trimming body feeling system |
-
2010
- 2010-05-05 CN CN2010101623711A patent/CN102236997A/en active Pending
Cited By (3)
| 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 |
| CN105702141A (en) * | 2016-04-21 | 2016-06-22 | 国网江苏省电力公司职业技能训练基地 | Live trimming body feeling system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1900599A (en) | Gas range with automatic reigniting function after accident fire cut-off | |
| CN201054202Y (en) | Short circuit demonstration device | |
| CN102236997A (en) | Short circuit experiment instrument | |
| JP2008191199A (en) | Somesthetic type home electric facility simulator | |
| CN201028630Y (en) | Flame combustion indicator light | |
| CN202584512U (en) | Short circuit and fuse effect experimental device | |
| CN2929518Y (en) | Gas range with automatic igniting function after accidently flame-out | |
| CN203631032U (en) | Demonstration teaching aid of classroom illumination light-operated system | |
| CN206370187U (en) | A kind of sensor with preheating function performs practical traning platform | |
| CN103456217B (en) | Multifunctional short circuit demonstration device | |
| CN104093258A (en) | Fluorescent lamp fault detection automatic power-off device and method thereof | |
| CN203503215U (en) | Multifunctional short circuit demonstration device | |
| CN201126680Y (en) | Flat mirror imaging demonstration instrument for teaching | |
| CN102236998A (en) | Demonstration device of short circuit experiment | |
| CN203661385U (en) | Fluorescent lamp fault detection automatic power-off device | |
| CN203953619U (en) | Driver is moving, night, the dark three-in-one tester of vision | |
| CN103384424A (en) | Intelligent switch of illuminating lamp | |
| CN103344802B (en) | A kind of Novel electric quantity display circuit | |
| CN206021713U (en) | Lighting circuit comprehensive demonstration instrument | |
| CN208367995U (en) | Home circuit demonstration board | |
| CN205863891U (en) | A kind of laboratory power of alterating and direct current short-circuit protection | |
| CN2884381Y (en) | Analog short-circuit device | |
| CN2222383Y (en) | Demonstration device for action of fuse | |
| CN107949118A (en) | The thermal-shutdown circuit of classroom blackboard LED light strip | |
| CN213364944U (en) | New forms of energy high pressure safety insulation test platform |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111109 |