CN2932395Y - Transformer antitheft alarm - Google Patents

Abstract

The utility model provides a burglar alarm for transformers. A branch circuit formed by the series connections of a relay J<1>, a light-emitting diode D<5>, a diode D<6>, and an accumulator E<1> is parallel connected with the two ends of the direct current regulated power supply. The series spot of the diode D<6> and the accumulator E<1> is connected with the collector of the triode BG<1> via the relay normally closed contact J<1-2> to extend to one input of the Not And gate Y<1>, and another input of the Not And gate Y<1> extends to the negative pole of the direct current regulated power supply via the rely normally open contact J<1-1>. The output of the Not And gate Y<1> is connected with two inputs of the Not And gate Y<2> via series resistor R<2>. The input is connected with the capacitor C<3> to ground. The output of the Not And gate Y<2> is connected with the base resistor R<3> of the triode BG<1> and another input of the Not And gate Y<1>, and an alarm control circuit is formed by arranging a buzzer F<1> on the emitter of the triode BG<1> to ground. The alarm alarms immediately when the transformer is powered off, and the lasting time is adjustable. The utility model takes a frightening effect on the burglar to make the criminal to escape with no mind to commit an offence, and is simple and compact in structure, steady and reliable in performance, and convenient to repair and maintain.

Description

The transformer anti-theft alarm

Technical field: the utility model relates to a kind of alarm control unit, particularly relates to a kind of alarm control unit that prevents that transformer is stolen and use.

Background technology: the stolen incident of transformer takes place in town and country various places often at present, not only makes troubles to user's power supply, also makes national wealth be subjected to heavy losses.In order to arrest criminal, administrative authority has dropped into a large amount of manpower and materials and financial resources, but because 11 of the big more options of crime time midnight of thief are between 4 of zero mornings, generally all adopt better in advance, and be certain about the area under one's jurisdiction user and turn off the light and commit a crime after having a rest, and crime time is short and rapid, is difficult for discovering.Stolen in order to prevent transformer, most of place has been taked to install additional theftproof lock or transformer has directly been welded dead measure on stand, but still similar incidents take place inevitably.And transformer and stand are welded together, all bring inconvenience for the replacing of transformer and maintenance etc.Cause problem to fail to be well solved.

Summary of the invention: the purpose of this utility model provides a kind of transformer anti-theft alarm, mainly be to solve because stolen the power supply to the user of transformer made troubles, national wealth is suffered a loss, and transformer directly welded extremely on stand, cause transformer to be changed and safeguard the problem that increases trouble.

Scheme of the present utility model is as described below: this utility model comprises housing, D.C. regulated power supply, light emitting diode D ₅, diode D ₆, triode BG ₁, accumulator E ₁, Sheffer stroke gate Y ₁, Y ₂, hummer F ₁, resistance R ₂, R ₃, capacitor C ₃, it is by the relay J in parallel at the two ends of D.C. regulated power supply ₁, light emitting diode D ₅, and diode D ₆With accumulator E ₁The duplexure of series connection is with diode D ₆With accumulator E ₁Series connection node insert triode BG respectively ₁Collector and through relay normally closed contact J _1-2To Sheffer stroke gate Y ₁One input, Sheffer stroke gate Y ₁Another input is through relay normally open contact J _1-1To the negative pole of D.C. regulated power supply, Sheffer stroke gate Y ₁Output is through resistance in series R ₂Insert another Sheffer stroke gate Y simultaneously ₂Two inputs, this input connects capacitor C over the ground ₃, and Sheffer stroke gate Y ₂Output and triode BG ₁Base biasing resistor R ₃And Sheffer stroke gate Y ₁Another input is connected, in addition at triode BG ₁Emitter is provided with hummer F over the ground ₁The alarm control circuit of forming is realized.

The beneficial effects of the utility model: this utility model is owing to taked said structure, particularly taked relay, Sheffer stroke gate, RC charge-discharge circuit to control the conducting and the ON time of triode and hummer, add organic cooperation of accumulator and diode, make this utility model behind the attaching power supply, transformer is reported to the police at once once having a power failure, not only the user is played suggesting effect, more thief is played the fright effect, can make criminal merely escape and not be in the mood for crime.Its time of fire alarming continues adjustable, can stop automatically reporting to the police after recovering to send electricity as this alarm of instantaneous power failure.As normal power failure operation, alarm stops to report to the police at the time of fire alarming of setting later automatically.Alarm recovers normal condition automatically after recovering to send electricity.Advantages such as that this utility model also has is simple and compact for structure, stable and reliable for performance, repair and maintenance is convenient.

Description of drawings: Fig. 1 is the electrical schematic diagram of transformer anti-theft alarm.

Embodiment: by transformer anti-theft alarm shown in Figure 1 at first by transformer B ₁, diode D ₁-D ₄, voltage stabilizer W ₁, resistance R ₁, capacitor C ₁, C ₂Form D.C. regulated power supply 1, in the two ends of D.C. regulated power supply 1 relay J in parallel ₁, light-emitting diodes D ₅, and diode D ₆With accumulator E ₁The duplexure that is composed in series is then with diode D ₆With accumulator E ₁Series connection node insert triode BG respectively ₁Collector and through relay J ₁Normally closed contact J ₁₂To Sheffer stroke gate Y ₁One input is with Sheffer stroke gate Y ₁Another input is through relay J ₁Normal opened contact J ₁₁Be connected to the negative pole of D.C. regulated power supply 1, Sheffer stroke gate Y ₁Output is through resistance in series R ₂Insert another Sheffer stroke gate Y simultaneously ₂Two inputs, this input connects capacitor C over the ground ₃, and Sheffer stroke gate Y ₂Output and triode BG ₁Base biasing resistor R ₃And Sheffer stroke gate Y ₁Another input is connected, and at triode BG ₁Emitter is provided with hummer F over the ground ₁The alarm control circuit of forming 2 constitutes.

During use, the utility model is installed in high pressure drop switch top, with transformer B ₁Elementary winding is connected with controlled transformer phase voltage, and during normal power supply, D.C. regulated power supply 1 is by diode D ₆Be accumulator E ₁Charging is relay J simultaneously ₁Power supply makes relay J ₁Normal opened contact J ₁₁Adhesive, normally closed contact J ₁₂Disconnect, with normal opened contact J ₁₁The Sheffer stroke gate Y that connects ₁One input and Sheffer stroke gate Y ₂Output is electronegative potential, causes triode BG ₁End hummer F ₁Do not work.Outage earlier when if thief is wanted to steal transformer, once power failure D.C. regulated power supply 1 loses power supply, accumulator E at this moment ₁To alarm control circuit 2 power supplies, diode D ₆Oppositely end.Relay J ₁Normal opened contact J ₁₁Disconnect normally closed contact J ₁₂Adhesive, Sheffer stroke gate Y ₂The output noble potential, triode BG ₁Conducting and triode BG ₁The hummer F that connects ₁Energized is sent alarm sound.Buzzer F ₁The length of time of fire alarming can be by changing resistance R ₂And capacitor C ₃Numerical value just can obtain.

Claims (1)

1, a kind of transformer anti-theft alarm comprises housing, D.C. regulated power supply (1), light emitting diode D ₅, diode D ₆, triode BG ₁, accumulator E ₁, Sheffer stroke gate Y ₁, Y ₂, buzzer F ₁, resistance R ₂, R ₃, capacitor C ₃, it is characterized in that: this alarm is by the relay J in parallel at the two ends of D.C. regulated power supply (1) ₁, light emitting diode D ₅, and diode D ₆With accumulator E ₁The duplexure of series connection is with diode D ₆With accumulator E ₁Series connection node insert triode BG respectively ₁Collector and through relay normally closed contact J _1-2To Sheffer stroke gate Y ₁One input, Sheffer stroke gate Y ₁Another input is through relay normally open contact J ₁₁To the negative pole of D.C. regulated power supply (1), Sheffer stroke gate Y ₁Output is through resistance in series R ₂Insert another Sheffer stroke gate Y simultaneously ₂Two inputs, this input connects capacitor C over the ground ₃, and Sheffer stroke gate Y ₂Output and triode BG ₁Base biasing resistor R ₃And Sheffer stroke gate Y ₁Another input is connected, and at triode BG ₁Emitter is provided with hummer F over the ground ₁The alarm control circuit of forming (2) constitutes.

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