CN204794950U - Buffering fire control drive circuit - Google Patents
Buffering fire control drive circuit Download PDFInfo
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- CN204794950U CN204794950U CN201520546544.8U CN201520546544U CN204794950U CN 204794950 U CN204794950 U CN 204794950U CN 201520546544 U CN201520546544 U CN 201520546544U CN 204794950 U CN204794950 U CN 204794950U
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Abstract
The utility model discloses a buffering fire control drive circuit, drive circuit still include opto -coupler circuit, control circuit, snubber circuit and implementation of circuit, and opto -coupler circuit is coupled is used for carrying linkage signal conversion to control circuit for control signal between linkage signal input part and control circuit, control circuit acquisition control signal and response output executive signal, control circuit be including a control contact still, and when the control contact was pressed, output executive signal's level overturn, implementation of circuit includes relay coil, and relay coil gets control release action when electric, is coupled to be used for receiving executive signal in control circuit to response executive signal gets with control relay coil, relay coil is coupled and is used for the drive coil to get electric triode, and the base of triode is coupled snubber circuit and is provided with a buffer time, and when snubber circuit received executive signal, triode operating condition was by amplifying the district through a buffer time late arrival saturation region.
Description
Technical field
The utility model relates to a kind of fire-fighting link circuit engineering field, and more particularly, it relates to a kind of buffering fire-fighting drive circuit.
Background technology
Fire-fighting linkage system is an important component part in automatic fire alarm system.Generally include fire protection linkage control device, fire protection control room display unit, transmission equipment, fire protection electric control device, fire-fighting equipment emergency power supply.
Fire-fighting link circuit on market generally adopts fire protection linkage control device to export and controls control signal, then directly adopt obtaining of control signal control relay electric, thus can when breaking out of fire, fire protection linkage control device exports the interlock signal of 24V, then the interlock signal Direct driver relay of 24V realizes the closed action of switch contact, thus the circuit breaker that the switch contact of fire-fighting link circuit relay electrical equipment connects is carried out separating brake.
But because the action of release is undertaken by coil adhesive armature, if but coil is direct to be obtained electric or loses electric current, the transient current that it produces is excessive, working life of relay is easily made to shorten, and the performing an action, so this problem directly affects the useful life of fire-fighting link circuit of a most important ring i.e. relay coil in fire-fighting link circuit.
Utility model content
For the deficiency that prior art exists, the purpose of this utility model be to provide a kind of can the fire-fighting link drive circuit of hand-reset.
For achieving the above object, the utility model provides following technical scheme: a kind of buffering fire-fighting drive circuit, comprise interlock signal input part in order to receive interlock signal, output is coupled to circuit breaker, drive circuit also comprises photoelectric coupled circuit, control circuit, buffer circuit and executive circuit, and described photoelectric coupled circuit is coupled between interlock signal input part and control circuit and is delivered to control circuit in order to interlock signal is converted to control signal; Described control circuit collection control signal also responds output executive signal, and described control circuit comprises an also control contact, and when controlling contact and being pressed, the level of output executive signal overturns; Described executive circuit comprises relay coil, controls release action, be coupled to control circuit in order to receive executive signal when described relay coil obtains electric, and responds executive signal and obtain electric with control relay coil; Described relay coil is coupled with and obtains electric triode for drive coil, the base stage of described triode couples buffer circuit and was provided with for the first buffer time, when buffer circuit receives executive signal, described triode operation state by amplification region after the first buffer time to saturation region.
The utility model can be set to further: described photoelectric coupled circuit comprises the first resistance, the first diode, photoelectrical coupler and the second resistance; Two inputs of described photoelectrical coupler are connected to interlock signal input part respectively by the first resistance and the first diode, the negative electrode of described first diode is connected with interlock signal input part, and the output of described photoelectrical coupler is by being connected to the input of control circuit after the second resistance pull-up connection.
The utility model can be set to further: described buffer circuit comprises the first electric capacity, the 3rd resistance and the 4th resistance, series connection the 4th resistance after output connection the 3rd resistance of described control circuit, then is connected to executive circuit; Described first Capacitance parallel connection is on the 3rd resistance, and wherein, the executive signal after delay exports from the 4th resistance.
The utility model can be set to further: described executive circuit comprises the 5th resistance, NPN triode, relay and the second diode;
The coil of described relay and the second diodes in parallel, one end of coil connects power supply, and the other end connects the collector electrode of NPN triode;
The base stage of described NPN triode is connected with emitter by the 5th resistance, and emitter is ground connection again; Drive singal after time delay inputs from the base stage of NPN triode.
The utility model can be set to further: described control circuit comprises the first single-shot trigger circuit, the second single-shot trigger circuit and d type flip flop, and the output of described first monostable circuit and the second monostable circuit is all coupled to the clock end of d type flip flop and is controlled by control signal respectively and controls contact pulsing; Described control circuit also comprises the 4th switching tube and the 6th resistance, and the controlled terminal of described 4th switching tube and the 6th resistance couple and couple nodes is connected to the input of d type flip flop; The output of described d type flip flop exports executive signal, and it is contrary with output level with the input level realizing d type flip flop that described 4th switching tube is controlled by executive signal action.
Compared with prior art, the beneficial effects of the utility model are: when control circuit A4 control signal TUOK is low, and NPN triode ends, and relay does not work; When TUOK is high, to the 5th capacitor charging, 4th resistance is equivalent to transient state short circuit, NPN triode operation is in saturation conduction state, and relay coil both end voltage is about VCC, and after the 5th capacitor charging completes, because the base current of the effect NPN triode of the 4th resistance reduces, NPN triode operation in amplification region, thus controls the voltage dropping on the coil two ends of relay, reaches the object of power consumption when reducing relay closes.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model fire-fighting link drive circuit embodiment;
Fig. 2 is the circuit theory diagrams of the utility model fire-fighting link drive circuit embodiment;
Fig. 3 is control circuit schematic diagram in Fig. 2.
In figure 1, interlock signal input part; A1, photoelectric coupled circuit; A2, buffer circuit; A3, executive circuit; A4, control circuit; A41, the first single-shot trigger circuit; A42, the second single-shot trigger circuit; A43, d type flip flop.
Embodiment
Referring to figs. 1 through Fig. 3, the utility model fire-fighting link drive circuit embodiment is described further.
As shown in Figure 1, the coordinated signals signal that linkage controller exports is LINK, LINK ', the connectivity port of interlock signal input part 1 signal for this reason, this port is that 24V links the positive and negative input of signal.This programme adopts fire-fighting link drive circuit indirectly to drive circuit breaker tripping, is reduced the wastage, and avoid the impact of electrical Interference by this mode.
As shown in Figure 2, a kind of buffering fire-fighting drive circuit, comprise interlock signal input part 1 in order to receive interlock signal, output is coupled to circuit breaker, drive circuit also comprises photoelectric coupled circuit A1, control circuit A4, buffer circuit A2 and executive circuit A3, and described photoelectric coupled circuit A1 is coupled between interlock signal input part 1 and control circuit A4 and is delivered to control circuit A4 in order to interlock signal is converted to control signal; Described control circuit A4 gathers control signal and response exports executive signal; Described buffer circuit A2 is coupled to the output of control circuit A4 in order to receive executive signal and time delay; Described executive circuit A3 is coupled to buffer circuit A2 in order to the executive signal after reception delay, and responds executive signal to cut off the connection of output and circuit breaker.
Photoelectric coupled circuit A1 comprises the first resistance, the first diode, photoelectrical coupler and the second resistance; Photoelectrical coupler adopts PC817 model, and low price is easy to use.Two inputs of described photoelectrical coupler are connected to interlock signal input part 1 respectively by the first resistance and the first diode, the negative electrode of described first diode is connected with interlock signal input part 1, and the output of described photoelectrical coupler is by being connected to the input of control circuit A4 after the second resistance pull-up connection.First resistance is current-limiting resistance, and can play the effect of protection photoelectrical coupler, photoelectrical coupler completes the conversion of light-electrical-optical, achieves electric isolation and control.Because the current rating of the light-emitting diode forward conduction in general optocoupler is about 30mA, operating current is generally 10mA to 20mA, so the span that can obtain the first resistance according to Current calculation formula is 2.4k Ω to 1.2k Ω.First diode is to prevent input reversal connection from causing optocoupler to damage, playing the effect of protection, prevent reverse current.Output INCUT, with the pull-up of 3.3V, be in order to control circuit A4 level match.
Buffer circuit A2 comprises the first electric capacity, the 3rd resistance and the 4th resistance, series connection the 4th resistance after output connection the 3rd resistance of described control circuit A4, then is connected to executive circuit A3; Described first Capacitance parallel connection is on the 3rd resistance, and wherein, the executive signal after delay exports from the 4th resistance.When control circuit A4 control signal TUOK is low, NPN triode ends, and relay does not work; When TUOK is high, to the 5th capacitor charging, 4th resistance is equivalent to transient state short circuit, NPN triode operation is in saturation conduction state, and relay coil both end voltage is about VCC, and after the 5th capacitor charging completes, because the base current of the effect NPN triode of the 4th resistance reduces, NPN triode operation in amplification region, thus controls the voltage dropping on the coil two ends of relay, reaches the object of power consumption when reducing relay closes.
Executive circuit A3 comprises the 5th resistance, NPN triode, relay and the second diode; The coil of described relay and the second diodes in parallel, one end of coil connects power supply, and the other end connects the collector electrode of NPN triode; The base stage of described NPN triode is connected with emitter by the 5th resistance, and emitter is ground connection again; Drive singal after time delay inputs from the base stage of NPN triode.
With reference to shown in Fig. 3, comprise the first single-shot trigger circuit A41, the second single-shot trigger circuit A42 and d type flip flop A43, the output of described first monostable circuit and the second monostable circuit is all coupled to the clock end of d type flip flop A43 and is controlled by control signal respectively and controls contact pulsing; Described control circuit A4 also comprises the 4th switching tube and the 6th resistance, and the controlled terminal of described 4th switching tube and the 6th resistance couple and couple nodes is connected to the input of d type flip flop A43; The output of described d type flip flop A43 exports executive signal, and it is contrary with output level with the input level realizing d type flip flop A43 that described 4th switching tube is controlled by executive signal action.Described control circuit A4 also comprises the 5th switching tube, and between the input that the controlled terminal of described 5th switching tube is connected to the first monostable circuit and control signal, when executive signal is high level, described 5th switching tube cut-off is shield executive signal input.Described first single-shot trigger circuit A41 and the second single-shot trigger circuit A42 is configured to the single-shot trigger circuit be made up of 555 timers.
Operation principle: when coordinated signals signal is input as 0, in optocoupler, light-emitting diode is not luminous, output not conducting, INCUT is high level 3.3V, and control circuit A4 receives signal, is failure to actuate, when coordinated signals signal input 24V signal, photoelectrical coupler conducting, output stage conducting, INCUT is equivalent to ground connection, level is low, control circuit A4 can export the executive signal of high level, thus execution trip operation, circuit breaker is namely made to disconnect, when release disconnects, Q end due to d type flip flop A43 exports as high level, so the non-output of Q is low level, control the 5th switching tube cut-off, 4th switching tube conducting simultaneously, D is held dragged down, but now owing to there is no porch to clock end, so Q end keeps, and control signal shields by the 5th switching tube, control signal cannot input triggering first single-shot trigger circuit A41 again and send pulse, now can only send signal controlling by the second single-shot trigger circuit A42 to export, and the second single-shot trigger circuit A42 is controlled by control contact, export so control can be carried out manually.
The above is only preferred implementation of the present utility model, protection range of the present utility model be not only confined to above-described embodiment, and all technical schemes belonged under the utility model thinking all belong to protection range of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (5)
1. a buffering fire-fighting drive circuit, comprise interlock signal input part in order to receive interlock signal, output is coupled to circuit breaker, it is characterized in that: drive circuit also comprises photoelectric coupled circuit, control circuit, buffer circuit and executive circuit, described photoelectric coupled circuit is coupled between interlock signal input part and control circuit and is delivered to control circuit in order to interlock signal is converted to control signal;
Described control circuit collection control signal also responds output executive signal, and described control circuit comprises an also control contact, and when controlling contact and being pressed, the level of output executive signal overturns;
Described executive circuit comprises relay coil, controls release action, be coupled to control circuit in order to receive executive signal when described relay coil obtains electric, and responds executive signal and obtain electric with control relay coil;
Described relay coil is coupled with and obtains electric triode for drive coil, the base stage of described triode couples buffer circuit and was provided with for the first buffer time, when buffer circuit receives executive signal, described triode operation state by amplification region after the first buffer time to saturation region.
2. buffering fire-fighting drive circuit according to claim 1, is characterized in that: described photoelectric coupled circuit comprises the first resistance, the first diode, photoelectrical coupler and the second resistance;
Two inputs of described photoelectrical coupler are connected to interlock signal input part respectively by the first resistance and the first diode, the negative electrode of described first diode is connected with interlock signal input part, and the output of described photoelectrical coupler is by being connected to the input of control circuit after the second resistance pull-up connection.
3. buffering fire-fighting drive circuit according to claim 1, it is characterized in that: described buffer circuit comprises the first electric capacity, the 3rd resistance and the 4th resistance, series connection the 4th resistance after output connection the 3rd resistance of described control circuit, then be connected to executive circuit; Described first Capacitance parallel connection is on the 3rd resistance, and wherein, the executive signal after delay exports from the 4th resistance.
4. the buffering fire-fighting drive circuit according to claim 1 or 2 or 3, is characterized in that: described executive circuit comprises the 5th resistance, NPN triode, relay and the second diode;
The coil of described relay and the second diodes in parallel, one end of coil connects power supply, and the other end connects the collector electrode of NPN triode;
The base stage of described NPN triode is connected with emitter by the 5th resistance, and emitter is ground connection again; Drive singal after time delay inputs from the base stage of NPN triode.
5. buffering fire-fighting drive circuit according to claim 4, it is characterized in that: described control circuit comprises the first single-shot trigger circuit, the second single-shot trigger circuit and d type flip flop, the output of described first monostable circuit and the second monostable circuit is all coupled to the clock end of d type flip flop and is controlled by control signal respectively and controls contact pulsing; Described control circuit also comprises the 4th switching tube and the 6th resistance, and the controlled terminal of described 4th switching tube and the 6th resistance couple and couple nodes is connected to the input of d type flip flop; The output of described d type flip flop exports executive signal, and it is contrary with output level with the input level realizing d type flip flop that described 4th switching tube is controlled by executive signal action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520546544.8U CN204794950U (en) | 2015-07-25 | 2015-07-25 | Buffering fire control drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520546544.8U CN204794950U (en) | 2015-07-25 | 2015-07-25 | Buffering fire control drive circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204794950U true CN204794950U (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520546544.8U Expired - Fee Related CN204794950U (en) | 2015-07-25 | 2015-07-25 | Buffering fire control drive circuit |
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| Country | Link |
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| CN (1) | CN204794950U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658970A (en) * | 2017-11-08 | 2018-02-02 | 柏宜照明（上海）股份有限公司 | A kind of relay protection circuit for fire-fighting equipment power supply |
| CN110189961A (en) * | 2019-05-19 | 2019-08-30 | 沈阳秀展科技有限公司 | A kind of electromagnetic relay active drop interference control circuit |
| CN110609509A (en) * | 2019-10-18 | 2019-12-24 | 九江中船消防设备有限公司 | Modulation circuit of fire-fighting field bus |
-
2015
- 2015-07-25 CN CN201520546544.8U patent/CN204794950U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658970A (en) * | 2017-11-08 | 2018-02-02 | 柏宜照明（上海）股份有限公司 | A kind of relay protection circuit for fire-fighting equipment power supply |
| CN107658970B (en) * | 2017-11-08 | 2024-05-14 | 柏宜照明（上海）股份有限公司 | Relay protection circuit for fire-fighting equipment power supply |
| CN110189961A (en) * | 2019-05-19 | 2019-08-30 | 沈阳秀展科技有限公司 | A kind of electromagnetic relay active drop interference control circuit |
| CN110609509A (en) * | 2019-10-18 | 2019-12-24 | 九江中船消防设备有限公司 | Modulation circuit of fire-fighting field bus |
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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: 20151118 Termination date: 20200725 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |