CN202856348U - Circuit power-off protection device - Google Patents
Circuit power-off protection device Download PDFInfo
- Publication number
- CN202856348U CN202856348U CN 201220391933 CN201220391933U CN202856348U CN 202856348 U CN202856348 U CN 202856348U CN 201220391933 CN201220391933 CN 201220391933 CN 201220391933 U CN201220391933 U CN 201220391933U CN 202856348 U CN202856348 U CN 202856348U
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- Prior art keywords
- resistance
- transistor
- switch
- diode
- relay
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- Expired - Fee Related
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- 239000003990 capacitor Substances 0.000 claims abstract description 11
- 230000001681 protective effect Effects 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Direct Current Feeding And Distribution (AREA)
- Keying Circuit Devices (AREA)
Abstract
The present utility model discloses a circuit power-off protection device. The device comprises a power supply device, electrical equipment, a switch K1-1, a switch K1-2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a transistor T1, a transistor T2, a transistor T3, a diode D1, a diode D2, a diode D3, a capacitor C1, a relay J and a relay switch JK, one end of the resistor R2 is connected with one end of the power supply device and one end of the switch K1-2, the other end of the resistor R2 and the other end of the switch K1-2 are connected with an anode of the capacitor C1, a cathode of the diode D2, an emitting electrode of the transistor T1, an emitting electrode of the transistor T2, an emitting electrode of the transistor T3, one end of the resistor R7 and a middle end of the relay switch JK. The device is practical, low in production costs, safe in use, and convenient to control.
Description
Technical field
The utility model relates to a kind of control device of power consumption equipment, particularly a kind of down circuitry protective device.
Background technology
Along with socioeconomic development, power consumption equipment has been seen everywhere in life, popularizing of power consumption equipment, thing followed power consumption equipment safety problem also more and more receives the concern of all circles, such as in the life often common to electrical problem: the power consumption equipment in normal the use is because civil power cuts off the power supply suddenly quits work, the user of service forgets again mains switch closed and left, if the city power recovery power supply, power consumption equipment just has the possibility of the work of initiating self; If power consumption equipment initiates self work, exist potential safety hazard not say, the waste of the energy also is the problem that can not neglect, if power consumption equipment is some machine power kind equipments, such as polishing machine, sanding machine etc., in the situation that will cause very serious security incident without personnel guard startup.
The utility model content
Technical problem to be solved in the utility model is for the deficiencies in the prior art, and a kind of novel down circuitry protective device is provided.
To achieve these goals, the utility model institute Adopts measure:
A kind of down circuitry protective device, comprise supply unit, power consumption equipment, K switch 1-1, K switch 1-2, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, transistor T 1, transistor T 2, transistor T 3, diode D1, diode D2, diode D3, capacitor C 1, relay J and relay switch JK, one end of described resistance R 2 is connected to an end of supply unit and the end of K switch 1-2, the other end of the other end of resistance R 2 and K switch 1-2 is connected to the anode of capacitor C 1, the negative terminal of diode D2, the emitter of transistor T 1, the emitter of transistor T 2, the emitter of transistor T 3, one end of resistance R 7 and the intermediate ends of relay switch JK, one end of described resistance R 1 is connected to the end of the supply unit other end and K switch 1-1, the other end of resistance R 1 links to each other with the negative pole of diode D1 and the positive pole of diode D2, relay J is connected between the negative pole of the collector electrode of transistor T 3 and capacitor C 1, the two ends of power consumption equipment are connected respectively to the other end of relay switch JK and K switch 1-1, turn on-switch K1-2 and K switch 1-1, in the situation of plugged device, electric current is through resistance R 2, transistor T 1 emitter, transistor T 1 base stage, resistance R 4, resistance R 5, diode D3 forms electric current to resistance R 3, so transistor T 1 conducting, transistor T 2 can't conducting, transistor T 3 conductings, the relay J adhesive, the normally-closed contact of relay switch JK disconnects, the disconnection that is connected of power consumption equipment and power supply, the plugged device, in the situation that turn on-switch K1-2 and K switch 1-1, resistance R 2, transistor T 1 emitter, transistor T 1 base stage, resistance R 4, resistance R 5, diode D3 can't form electric current to resistance R 3, so transistor T 1 not conducting, resistance R 2, transistor T 2 emitters, transistor T 2 base stages, resistance R 6, diode D1 forms electric current to resistance R 1, so transistor T 2 conductings, transistor T 3 cut-offs, not adhesive of relay J, the normally-closed contact of relay switch JK is connected, power consumption equipment is connected with power supply, normally starts working;
Described resistance R 2 is connected to the negative pole of supply unit, and resistance R 1 is connected to the positive pole of supply unit;
Described K switch 1-1 and K switch 1-2 are double-pole switch.
The beneficial effects of the utility model: practicality, production cost is low, uses safety, is convenient to control.
Description of drawings
Fig. 1, member connection structure schematic diagram of the present utility model.
Embodiment
A kind of down circuitry protective device, comprise supply unit, power consumption equipment, K switch 1-1, K switch 1-2, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, transistor T 1, transistor T 2, transistor T 3, diode D1, diode D2, diode D3, capacitor C 1, relay J and relay switch JK, one end of described resistance R 2 is connected to an end of supply unit and the end of K switch 1-2, the other end of the other end of resistance R 2 and K switch 1-2 is connected to the anode of capacitor C 1, the negative terminal of diode D2, the emitter of transistor T 1, the emitter of transistor T 2, the emitter of transistor T 3, one end of resistance R 7 and the intermediate ends of relay switch JK, one end of described resistance R 1 is connected to the end of the supply unit other end and K switch 1-1, the other end of resistance R 1 links to each other with the negative pole of diode D1 and the positive pole of diode D2, relay J is connected between the negative pole of the collector electrode of transistor T 3 and capacitor C 1, the two ends of power consumption equipment are connected respectively to the other end of relay switch JK and K switch 1-1, turn on-switch K1-2 and K switch 1-1, in the situation of plugged device, electric current is through resistance R 2, transistor T 1 emitter, transistor T 1 base stage, resistance R 4, resistance R 5, diode D3 forms electric current to resistance R 3, so transistor T 1 conducting, transistor T 2 can't conducting, transistor T 3 conductings, the relay J adhesive, the normally-closed contact of relay switch JK disconnects, the disconnection that is connected of power consumption equipment and power supply, the plugged device, in the situation that turn on-switch K1-2 and K switch 1-1, resistance R 2, transistor T 1 emitter, transistor T 1 base stage, resistance R 4, resistance R 5, diode D3 can't form electric current to resistance R 3, so transistor T 1 not conducting, resistance R 2, transistor T 2 emitters, transistor T 2 base stages, resistance R 6, diode D1 forms electric current to resistance R 1, so transistor T 2 conductings, transistor T 3 cut-offs, not adhesive of relay J, the normally-closed contact of relay switch JK is connected, power consumption equipment is connected with power supply, normally starts working; Described resistance R 2 is connected to the negative pole of supply unit, and resistance R 1 is connected to the positive pole of supply unit; Described K switch 1-1 and K switch 1-2 are double-pole switch.
In power consumption equipment, install the utility model, solved in the emergency power off situation, the potential safety hazard that operational outfit exists, easy to use, thus realize the purpose of this utility model.
Those skilled in the art's simple change and replacement in this area all are within the protection range of the present utility model.
Claims (3)
1. down circuitry protective device; comprise supply unit; power consumption equipment; K switch 1-1; K switch 1-2; resistance R 1; resistance R 2; resistance R 3; resistance R 4; resistance R 5; resistance R 6; resistance R 7; transistor T 1; transistor T 2; transistor T 3; diode D1; diode D2; diode D3; capacitor C 1; relay J and relay switch JK; it is characterized in that: an end of described resistance R 2 is connected to an end of supply unit and the end of K switch 1-2; the other end of the other end of resistance R 2 and K switch 1-2 is connected to the anode of capacitor C 1; the negative terminal of diode D2; the emitter of transistor T 1; the emitter of transistor T 2; the emitter of transistor T 3; one end of resistance R 7 and the intermediate ends of relay switch JK; one end of described resistance R 1 is connected to the end of the supply unit other end and K switch 1-1; the other end of resistance R 1 links to each other with the negative pole of diode D1 and the positive pole of diode D2; relay J is connected between the negative pole of the collector electrode of transistor T 3 and capacitor C 1; the two ends of power consumption equipment are connected respectively to the other end of relay switch JK and K switch 1-1; turn on-switch K1-2 and K switch 1-1; in the situation of plugged device; electric current is through resistance R 2; transistor T 1 emitter; transistor T 1 base stage; resistance R 4; resistance R 5; diode D3 forms electric current to resistance R 3; so transistor T 1 conducting; transistor T 2 can't conducting; transistor T 3 conductings; the relay J adhesive; the normally-closed contact of relay switch JK disconnects; the disconnection that is connected of power consumption equipment and power supply; the plugged device; in the situation that turn on-switch K1-2 and K switch 1-1; resistance R 2; transistor T 1 emitter; transistor T 1 base stage; resistance R 4; resistance R 5; diode D3 can't form electric current to resistance R 3; so transistor T 1 not conducting; resistance R 2; transistor T 2 emitters; transistor T 2 base stages; resistance R 6; diode D1 forms electric current to resistance R 1; so transistor T 2 conductings; transistor T 3 cut-offs; not adhesive of relay J; the normally-closed contact of relay switch JK is connected; power consumption equipment is connected with power supply, normally starts working.
2. a kind of down circuitry protective device according to claim 1, it is characterized in that: described resistance R 2 is connected to the negative pole of supply unit, and resistance R 1 is connected to the positive pole of supply unit.
3. a kind of down circuitry protective device according to claim 1, it is characterized in that: described K switch 1-1 and K switch 1-2 are double-pole switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220391933 CN202856348U (en) | 2012-08-09 | 2012-08-09 | Circuit power-off protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220391933 CN202856348U (en) | 2012-08-09 | 2012-08-09 | Circuit power-off protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202856348U true CN202856348U (en) | 2013-04-03 |
Family
ID=47987506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220391933 Expired - Fee Related CN202856348U (en) | 2012-08-09 | 2012-08-09 | Circuit power-off protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202856348U (en) |
-
2012
- 2012-08-09 CN CN 201220391933 patent/CN202856348U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20130403 Termination date: 20150809 |
|
| EXPY | Termination of patent right or utility model |