CN203950481U - A kind of circuit demonstration device that burns because electric current is excessive - Google Patents
A kind of circuit demonstration device that burns because electric current is excessive Download PDFInfo
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- CN203950481U CN203950481U CN201420062002.9U CN201420062002U CN203950481U CN 203950481 U CN203950481 U CN 203950481U CN 201420062002 U CN201420062002 U CN 201420062002U CN 203950481 U CN203950481 U CN 203950481U
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Abstract
The utility model belongs to teaching experimental equipment field, relate to a kind of circuit demonstration device that burns because electric current is excessive, it is characterized in that: formed by installing plate, transformer, bulb, knife switch, analog line, analog electronics, multistation terminal block, binding post, transformer, bulb are installed on installing plate and arrange up and down, multistation terminal block, knife switch, analog line, binding post are installed on upper row on installing plate, and analog electronics is for subsequent use.This circuit demonstration device scientific structure design of burning because electric current is excessive is reasonable, have structure comparatively perfect, easy and simple to handle, abundant in content, interesting strong, simulate the advantages such as vivider, directly perceived, security is high, be a kind of circuit with higher innovation demonstration device that burns because electric current is excessive.
Description
Technical field
The utility model belongs to teaching experimental equipment field, particularly a kind of circuit for junior middle school physics teaching experiment demonstration device that burns because electric current is excessive.
Background technology
The electrical appliance of simultaneously working in circuit is too much, and the phenomenon that causes line current to exceed rated current is called overload.Overload easily causes the heatings such as wire, switch, socket, can accelerate insulating material aging or burn out insulation epidermis, even initiation fire.Excessive the occurred fire of general power of simulation electrical appliance, easily causes danger, and difficulty is larger, is an operation that is difficult for accomplishing, and has potential safety hazard.During in ninth grade physics home circuit of existing junior middle school, the excessive reason one of electric current saves, in order to allow student understand the general power of household electrical appliance to the impact of home circuit, understand the excessive harm of general power, require student to carry out " general power of electrical appliance is excessive; easily breaking out of fire " and test and introduce experimental technique, but its institute's experimental technique of introducing and device are perfect not to the utmost, troublesome poeration, too much causes the excessive harmfulness of electric current in circuit to reflect not fully with directly perceived to electrical appliance.
Summary of the invention
The purpose of this utility model is to overcome the deficiency of existing experimental provision, provide a kind of structure comparatively perfect, easy and simple to handle, abundant in content, interesting strong, simulate vivider, directly perceived, the safe circuit demonstration device that burns because electric current is excessive.
The utility model solves its technical matters and is achieved through the following technical solutions:
A kind of circuit demonstration device that burns because electric current is excessive, it is characterized in that: formed by installing plate, transformer, bulb, knife switch, analog line, analog electronics, multistation terminal block, binding post, transformer, bulb are installed on installing plate and arrange up and down, multistation terminal block, knife switch, analog line, binding post are installed on upper row on installing plate, and analog electronics is for subsequent use.
And described analog line, is made up of iron clamp, the simulation wire that catches fire, iron clamp is installed on installing plate, and simulation is caught fire wire clamp in iron clamp.
And described iron clamp is two, two iron clamps are installed on installing plate relatively.
And the described simulation wire that catches fire, is one section of aluminium foil paper slip, aluminium foil paper slip two ends are clipped in respectively in two iron clamps.
And, described analog electronics is multiple, be respectively 5 Ω, 10 Ω, 20 Ω, 36 Ω, 72 Ω, by support, insulating porcelain bushing, insulation porcelain wiring square, resistance wire, plug composition, insulation porcelain wiring square is installed in support upper end, and resistance wire is arranged on support, and two ends are installed on insulation porcelain wiring square, insulating porcelain bushing is sleeved on resistance wire, and plug is electrically connected with resistance wire.
Advantage of the present utility model and beneficial effect are:
1. this circuit demonstration device that burns because electric current is excessive is simple in structure, makes, installs easily, easy and simple to handle.
2. this circuit demonstration device Mechanical Builds compactness of burning because electric current is excessive is attractive in appearance, and demo content is abundant, simulates vivider, directly perceived, true to naturely, and interest is stronger.
3. this circuit demonstration device that burns because electric current is excessive is low-voltage simulation, safe.
4. this circuit demonstration device scientific structure design of burning because electric current is excessive is reasonable, have structure comparatively perfect, easy and simple to handle, abundant in content, interesting strong, simulate the advantages such as vivider, directly perceived, security is high, be a kind of circuit with higher innovation demonstration device that burns because electric current is excessive.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is analog electronics structural representation of the present utility model;
Fig. 3 is for simulating the wire aluminium-foil paper plate shape figure that catches fire.
1-bulb, 2-multistation terminal block, 3-installing plate, 4 knife switches, 5-iron clamp, 6-simulates the wire that catches fire, 7-transformer, 8-binding post, 9-insulation porcelain wiring square, 10-support, 11-resistance wire, 12-insulating porcelain bushing, the 13-aluminium foil scraps of paper, 14-fold line.
Embodiment
Below by specific embodiment, the utility model is described in further detail, and following examples are descriptive, is not determinate, can not limit protection domain of the present utility model with this.
A kind of circuit demonstration device that burns because electric current is excessive, is made up of installing plate 3, transformer 7, bulb 1, knife switch 4, analog line, analog electronics, multistation terminal block 2, binding post 8.Transformer, bulb are installed on installing plate and arrange up and down, and multistation terminal block, knife switch, analog line, binding post are installed on upper row on installing plate, and analog electronics is for subsequent use.
Analog line, is made up of iron clamp 5, the simulation wire 6 that catches fire; Iron clamp is two, and two iron clamps are installed on installing plate relatively; Simulating the wire that catches fire, is one section of aluminium foil paper slip, and aluminium foil paper slip two ends are clipped in respectively in two iron clamps.
Catch fire wire, iron clamp, multistation terminal block of transformer, binding post, iron clamp, simulation is electrically connected formation circuit successively.
Analog electronics is multiple, be respectively 5 Ω, 10 Ω, 20 Ω, 36 Ω, 72 Ω, by support 10, insulating porcelain bushing 12, insulation porcelain wiring square 9, resistance wire 11, plug composition, insulation porcelain wiring square is installed in support upper end, resistance wire is arranged on support, two ends are installed on insulation porcelain wiring square, and insulating porcelain bushing is sleeved on resistance wire, and plug is electrically connected with resistance wire.
Aluminium foil paper slip method for making: aluminium-foil paper (cigarette wrapper) is cut into the aluminium foil scraps of paper 13, by relative without the one side of aluminium foil two aluminium foil scraps of paper, and there are fold line 14 parts to be pasted together centre, again according to fold line vestige, a slice is to left folding, another sheet is folded into T-shaped to the right, and T-shaped bottom will be cut into point point, more sharp more easy firing; Also can not be too sharp, prevent that little load from burning.
The utility model circuit demonstration device using method of burning because electric current is excessive:
1, circuit is connected firm, transformer is switched on power, bulb is connected on multistation terminal block, by knife switch closure, now bulb is normally luminous, and circuit is safe condition.
2, by analog electronics from small to large gradation be connected on multistation terminal block, analog electronics of every increase, observes the simulation conductive wire scenario of catching fire; As missing of ignition, then increase load, progressively load, while being loaded into a certain degree, in circuit, electric current increases to the simulation wire that catches fire and cannot carry, and temperature raises and burns, and because the simulation wire that catches fire is aluminium foil paper slip, the condition of high temperature can burn and catch fire, until circuit blows.Due to the simulation sharp difference in size in wire bottom of catching fire, may test at every turn and be loaded into the analog electronics power difference used of catching fire.
Test by this demonstration device, the impact of the general power that can make student's profound understanding household electrical appliance on home circuit, understands the excessive harm of general power.
Although disclose for the purpose of illustration embodiment of the present utility model and accompanying drawing, but it will be appreciated by those skilled in the art that: not departing from the spirit and scope of the utility model and claims, various replacements, variation and amendment are all possible, therefore, scope of the present utility model is not limited to embodiment and the disclosed content of accompanying drawing.
Claims (5)
1. the circuit demonstration device that burns because electric current is excessive, it is characterized in that: formed by installing plate, transformer, bulb, knife switch, analog line, analog electronics, multistation terminal block, binding post, transformer, bulb are installed on installing plate and arrange up and down, multistation terminal block, knife switch, analog line, binding post are installed on upper row on installing plate, and analog electronics is for subsequent use.
2. the circuit according to claim 1 demonstration device that burns because electric current is excessive, is characterized in that: described analog line, formed by iron clamp, the simulation wire that catches fire, and iron clamp is installed on installing plate, and simulation is caught fire wire clamp in iron clamp.
3. the circuit according to claim 2 demonstration device that burns because electric current is excessive, is characterized in that: described iron clamp is two, and two iron clamps are installed on installing plate relatively.
4. the circuit according to claim 2 demonstration device that burns because electric current is excessive, is characterized in that: the described simulation wire that catches fire is one section of aluminium foil paper slip, and aluminium foil paper slip two ends are clipped in respectively in two iron clamps.
5. the circuit according to claim 1 demonstration device that burns because electric current is excessive, it is characterized in that: described analog electronics is multiple, be respectively 5 Ω, 10 Ω, 20 Ω, 36 Ω, 72 Ω, by support, insulating porcelain bushing, insulation porcelain wiring square, resistance wire, plug composition, insulation porcelain wiring square is installed in support upper end, and resistance wire is arranged on support, and two ends are installed on insulation porcelain wiring square, insulating porcelain bushing is sleeved on resistance wire, and plug is electrically connected with resistance wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420062002.9U CN203950481U (en) | 2014-02-08 | 2014-02-08 | A kind of circuit demonstration device that burns because electric current is excessive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420062002.9U CN203950481U (en) | 2014-02-08 | 2014-02-08 | A kind of circuit demonstration device that burns because electric current is excessive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203950481U true CN203950481U (en) | 2014-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420062002.9U Expired - Fee Related CN203950481U (en) | 2014-02-08 | 2014-02-08 | A kind of circuit demonstration device that burns because electric current is excessive |
Country Status (1)
| Country | Link |
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| CN (1) | CN203950481U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212368A (en) * | 2018-11-02 | 2019-01-15 | 贵州电网有限责任公司 | A kind of resistance to lightning current ablation capability assessment method of lead wire and earth wire in transmission line |
-
2014
- 2014-02-08 CN CN201420062002.9U patent/CN203950481U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212368A (en) * | 2018-11-02 | 2019-01-15 | 贵州电网有限责任公司 | A kind of resistance to lightning current ablation capability assessment method of lead wire and earth wire in transmission line |
| CN109212368B (en) * | 2018-11-02 | 2020-12-01 | 贵州电网有限责任公司 | Method for evaluating lightning current ablation resistance of ground wire of power transmission line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141119 Termination date: 20160208 |