CN2248943Y

CN2248943Y - Fire-proof automatic alarming power supply

Info

Publication number: CN2248943Y
Application number: CN 95222491
Authority: CN
Inventors: 刘广春
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-09-29
Filing date: 1995-09-29
Publication date: 1997-03-05
Anticipated expiration: 2005-09-29

Abstract

The utility model provides a fire-proof automatic alarming power supply, which is composed of an isolating transformer, a two-circuit current sampler, a voltage dependent resistor, an LC network, an AC contactor, a comparison amplification control circuit, a smog and combustible gas probe and a sound-light indicating circuit. When a line overloads or short-circuits or the periphery of the probe has smog or combustible gas, the comparison amplification control circuit controls the AC contactor to be disconnected, cuts off a power supply, and starts a sound-light alarming circuit. The power supply can effectively prevent fire caused by overload, short circuit and the leakage of the combustible gas. The fire-proof automatic alarming power supply has the advantages of strong security and high sensitivity, and is capable of being used in hotels, restaurants, song and dance halls, school s, etc.

Description

The automatic warning power supply of preventing fires

The utility model relates to a kind of safe power supply power supply.

Fire jeopardizes people's life security, cause a large amount of property losses, reason on fire is a lot, wherein because the fire that electricity causes accounts for 40%-50%, electricity causes that leading cause of fire has two: the one, and the electricity consumption of overload excess load causes the overheated burning of electric wire, cause fire, the 2nd, short circuit appears in the circuit, produce spark, successional short circuit, produce successional spark, the combustion thing around igniting causes fire.The power supply that uses when above-mentioned situation occurring, can not be cut off the electricity supply effectively at present, notifies people's circuit to break down.

The purpose of this utility model will provide a kind of power supply exactly, when excess load or short circuit, can cut off the electricity supply immediately and report to the police, and notifies people's circuit fault to occur.

For achieving the above object, the utility model has adopted following technical scheme, and the automatic warning power supply of preventing fires is by isolating transformer B ₁, piezo-resistance V, LC network form B ₁Input termination alternating current, output is connected to piezo-resistance V and LC network, with anti-lightning strike and arc control, is connected to by relay J between LC network and power output end ₂The A.C. contactor J of control ₁, at B ₁Output and piezo-resistance V between be connected to two-way current sampler B ₂, B ₂Two-way output N ' ₂, N ' ₃Send into by two operational amplifier IC through rectification and voltage division ₁, IC ₂Two voltage comparators of forming, N ' ₂, N ' ₃Positive pole after the output rectification links N ' with the power end of two voltage comparators ₂The output rectification is after R ₁, R ₂Dividing potential drop is sent IC ₁In-phase end, N ＇ ₃The output rectification is after R ₃, R ₄Dividing potential drop is sent operational amplifier IC ₂In-phase end, IC ₁, IC ₂End of oppisite phase provide reference level by the divider resistance that is connected between power supply and the ground wire, IC ₁, IC ₂The signal of telecommunication of output is sent into by triode BG ₁The drive circuit of forming, control relay J ₂, select R ₁, R ₂, R ₃, R ₄, resistance, when circuit just often, IC ₁, IC ₂The current potential of in-phase end be higher than end of oppisite phase, output high level, J ₂Conducting, J ₁Conducting, when circuit overload, IC ₂The current potential of in-phase end is lower than end of oppisite phase, and output low level is at R ₃Both sides be connected to delay capacitor C ₄, with false action-proof, when line short, IC ₁The current potential of in-phase end is lower than end of oppisite phase, output low level, IC ₁Or IC ₂Output low level, BG ₁End J ₂Disconnect J ₁Disconnect, circuit is cut off the electricity supply automatically, connects sound and light alarm circuit.

This power supply also has a smog, and fuel gas probe P is by positive-negative-positive triode BG ₂Control J ₂, J ₂Be connected on BG ₁, BG ₂Collector electrode between, the output of this probe is respectively by diode and BG ₂Emitter and base stage link, when environment just often, output open circuit, BG ₂Conducting, when probe detection arrives a certain amount of smog or fuel gas, output short circuit, BG ₂End J ₂Disconnect.

The fire prevention of adopting technique scheme the to make power supply of reporting to the police automatically has overload and short-circuit protection function, and when electrical equipment excess load under the control of this power supply or line short, sound and light alarm is sent in the automatic trip of this power supply.Because this power supply has adopted isolating transformer, when human body contact single line (live wire) or when single line (live wire) is under water, the phenomenon of all not getting an electric shock, when fire occurring, guaranteed fire fighting personnel's safety, this power supply also has a smog, fuel gas probe, makes people can in time find the condition of a fire, prevents that combustible gas leakage from causing fire.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is a circuit block diagram of the present utility model.

Fig. 2 is the utility model main circuit schematic diagram.

Fig. 3 is that current ratio is amplified in the utility model, the control section circuit theory diagrams.

Fig. 4 is the utility model sound and light alarm partial circuit schematic diagram.

In Fig. 2, the alternating current of 220V is connected to annular isolation transformer B through protective tube, K switch ₁Input, output is connected to the two-way current sampler B that circuit is carried out current detecting ₂, piezo-resistance V and LC network, sending and receiving have by J between LC network and output ₂The A.C. contactor J of control ₁, J ₁Four conducting contact J _1-1～J _1-4Be connected in the circuit J ₁In addition four contact J _1-5～J _1-8Be connected in the sound light alarming circuit, work as J ₁Disconnect, when cutting off the electricity supply, J _1-5～J _1-8Conducting, sound light alarming circuit is connected.Switch AN is a starting switch, B ₁Another road output N ₃, N ₄Through rectification, IC ₃, IC ₄Voltage stabilizing is for relatively amplification control circuit and sound light alarming circuit provide the DC power supply VC of 12V and 5V ₁And VC ₂

In Fig. 3, B ₂Two-way output N ' ₂, N ' ₃Positive pole after the rectification and power supply VC ₁Link N ' ₂After the output rectification, through R ₁, R ₂Dividing potential drop, its contact is through resistance R ₅With IC ₁In-phase end link N ' ₃The output rectification is after R ₃, R ₄Dividing potential drop, its contact is through R ₆With IC ₂In-phase end link IC ₁, IC ₂End of oppisite phase by being connected to power supply VC ₁And the divider resistance R between the ground wire ₇, R ₈And R ₉, R ₁₀About 6 volts reference level is provided.

Drive circuit is by NPN type triode BG ₁With positive-negative-positive triode BG ₂Form relay J ₂Be connected to BG ₁And BG ₂Collector electrode between, BG ₂Emitter through diode D ₁With VC ₁Link, base stage is through resistance R ₁₃Ground connection, R ₁₁, R ₁₂Be BG ₁Provide enough drive currents, IC ₁, IC ₂Output through resistance and BG ₁Base stage link, the output of smog, fuel gas probe P is respectively through diode D ₁, D ₂With BG ₂Emitter and base stage link, select R ₁, R ₂Be 15K, R ₃Be 40K, R ₄Be 15K, when circuit just often, IC ₁, IC ₂The current potential of in-phase end is higher than end of oppisite phase, IC ₁, IC ₂The output high level, BG ₁Conducting, when circuit overload surpasses 10%, N ' ₃In electric current increase R ₃The pressure drop at two ends increases, IC ₂The current potential of in-phase end is lower than end of oppisite phase, output low level, BG ₁End R ₃The capacitor C on both sides ₄Play time-lag action, to prevent the moment J of appliance starting ₂Produce misoperation.When circuit just transships, IC ₁The current potential of in-phase end still is higher than end of oppisite phase.When line short, N ' ₂In electric current sharply increase R ₁The pressure drop on both sides increases, IC ₁The current potential of in-phase end will be lower than end of oppisite phase, IC ₁Output low level, BG ₁End.Capacitor C ₁, C ₂, C ₃, C ₅Effect be eliminate to disturb.Pop one's head in the P surrounding environment just often when smog, fuel gas, and its output is opened a way, BG ₂Conducting, when probe detection arrives a certain amount of smog or fuel gas, its output short circuit, BG ₂End.When circuit, environment all just often, BG ₁Conducting, BG ₂Conducting, J ₂Conducting, J ₁Conducting, the circuit operate as normal.When overload or short circuit, BG ₁End, or when probe detection arrives a certain amount of smog or fuel gas, BG ₂End J ₂Disconnect J ₁Contact J _1-1～J _1-4Disconnect, line power cuts off, contact J _1-5～J _1-8Connect sound light alarming circuit, notify people handling failure.

This power supply security is strong, and is highly sensitive, and function is complete, can be widely used in hotel, restaurant, dancing hall, school etc.

Claims

1, the automatic warning power supply of a kind of fire prevention is by isolating transformer B ₁, piezo-resistance V, LC network form B ₁Input termination alternating current, output is connected to piezo-resistance V and LC network, with anti-lightning strike and arc control, it is characterized in that: be connected to by relay J between LC network and power output end ₂The A.C. contactor J of control ₁, at B ₁Output and piezo-resistance V between be connected to two-way current sampler B ₂, B ₂Two-way output N ' ₂, N ' ₃Send into by two operational amplifier IC through rectification, dividing potential drop ₁, IC ₂Two voltage comparators of forming, N ' ₂, N ' ₃Positive pole after the output rectification links N ＇ with the power end of two voltage comparators ₂The output rectification is after R ₁, R ₂Dividing potential drop, send IC ₁In-phase end, N ' ₃The output rectification is after R ₃, R ₄Dividing potential drop is sent IC ₂In-phase end, IC ₁, IC ₂End of oppisite phase provide reference level by the divider resistance that is connected between power supply and the ground wire, IC ₁, IC ₂The signal of telecommunication of output is sent into by triode BG ₁The drive circuit of forming, control relay J ₂, select R ₁, R ₂, R ₃, R ₄Resistance, when circuit just often, IC ₁, IC ₂The current potential of in-phase end is higher than end of oppisite phase, output high level, J ₂Conducting, J ₁Conducting, when circuit overload, IC ₂The current potential of in-phase end is lower than end of oppisite phase, output low level, R ₃Both sides are parallel with delay capacitor C ₄, with false action-proof, when line short, IC ₁The current potential of in-phase end is lower than end of oppisite phase, output low level, IC ₁Or IC ₂Output low level, BG ₁End J ₂Disconnect J ₁Disconnect, circuit cuts off the power supply automatically, connects sound light alarming circuit.

2, the fire prevention according to claim 1 power supply of reporting to the police automatically is characterized in that: this power supply also has a smog, fuel gas probe P, by positive-negative-positive triode BG ₂Control J ₂, the output of this probe is respectively by diode and BG ₂Emitter and base stage link J ₂Be connected on BG ₁, BG ₂Between the collector electrode, when environment just often, output open circuit, BG ₂Conducting, when probe detection arrives a certain amount of smog or fuel gas, output short circuit, BG ₂End J ₂Disconnect.