CN2321052Y - Gas leakage intelligent control speech alarm - Google Patents

Abstract

The utility model relates to a gas leakage intelligent control speech alarm, which is composed of an automatic control device and an intelligent control valve device, wherein, the automatic control device comprises a voltage stabilizing circuit for voltage reduction and rectification, a source current conditioning circuit, an electric bridge sampling circuit, a comparison amplifying circuit, a sound and light alarming circuit, and a triggering delay circuit. The sampling circuit comprises a bridge circuit which is composed of a detection sensing element, a compensation element, a resistor and a potentiometer. The alarm can alarm in gas leakage time, and automatically cut off a gas path, open a ventilator, and automatically lock an electromagnetic valve simultaneously. The electromagnetic valve can be used until the electromagnetic valve is reset by people. The alarm has the advantages of high sensitivity, safety, etc.

Description

Gas leakage Based Intelligent Control language alarm

The utility model relates to a kind of inflammable gas that is used for and leaks the control warning device.

At present, being used for device that combustible gas leakage is reported to the police, generally is when occurring leaking, and the control warning circuit sends the sound and light alarm signal.If on-the-spot unmanned or, therefore can cause the generation of catching fire of causing by combustible gas leakage or explosion accident because other former thereby alerting signal of failing in time to hear or see then can in time be taken measures.Described traditional combustible gas leakage warning device exists the shortcoming of function singleness.

It is a kind of when gas leakage, not only capable of automatic alarm that the purpose of this utility model is to provide, and can cut off source of the gas automatically, opens ventilation unit, all drains the back in combustion gas and remove warning, recovers the gas leakage Based Intelligent Control language alarm of monitoring state.

The utility model is made up of automaton and intelligence control valve gear two parts; It is characterized in that: automaton comprises: step-down rectifier, mu balanced circuit, constant-current source circuit, electric bridge sample circuit, comparison amplifying circuit, sound light alarming circuit and triggering delay circuit, described sample circuit constitute bridge diagram by detecting sensing element, compensating element,, resistance and potentiometer; The signal output part of described sample circuit and comparison amplifying circuit IC ₄An input end be connected; By a constant current source is the sample circuit power supply; Described relatively amplifying circuit IC ₄When sample circuit produces deviation voltage, can make to be attached thereto the optical alarm circuit work that connects, make the relay J that is attached thereto ₂On-off circuit IC ₃Work, relay J ₂Work, make relay J ₂The normally opened contact adhesive, connect intelligence control valve circuit, the work of intelligence control valve, control executing mechanism is cut off gas circuit; The valve body tube chamber of described intelligence control valve gear is connected with gas pipeline by screw thread, and control lever is housed on the valve body, and control lever can move up and down in the bar shell; While language alarm IC circuit ₂Work also is triggered; The relay J of control ventilation blower work ₁Be connected with described relatively amplifying circuit control output end by a delay circuit; Relay J ₁Normally closed contact be serially connected in the intelligence control valve current supply circuit, normally opened contact is serially connected in the ventilation blower current supply circuit; The solenoid valve of described smart valve device is provided with a position and lock pin on spool, and corresponding with it pin clamp is arranged on control lever.

The utlity model has inflammable gas is detected and warning function.Also can implement protection simultaneously automatically, cut off gas circuit, start ventilation blower.After cutting off gas circuit, smart valve automatically locks, and could normally use behind manual reset.This device sensitivity height, safety and easy access.

The drawing explanation:

Fig. 1 is the theory diagram of gas leakage Based Intelligent Control language alarm of the present utility model.

Fig. 2 is the circuit embodiments figure of gas leakage Based Intelligent Control language alarm of the present utility model.

The valve body tube chamber of intelligence control valve gear of the present utility model is connected with gas pipeline by screw thread, and control lever is housed on the valve body, and it can move up and down in the bar shell, realizes cutting off automatically and hand-reset connection source of the gas.Detecting element in the sample circuit and compensating element, are the hot wire type carrier catalyst elements of symmetry, and detecting element contacts with air, and compensating element, does not contact with air.When in the surrounding air during no inflammable gas, electric bridge is output as zero, and when containing inflammable gas in the surrounding air and being diffused into detecting element naturally, because catalytic action produces flameless burning, element platinum filament temperature raises, its resistance value increase.At this moment, electric bridge has deviation signal output.The size of this deviation signal and the concentration of inflammable gas are proportional.Deviation signal is compared and enlarged, finish automatic sound-light alarm and close valve cut-out source of the gas, start ventilation unit automatically through triggering delay circuit.Combustion gas all drains the back and removes the recovery monitoring state of reporting to the police, and guarantees to use safely combustion gas.

Power supply after time-delay is amplified in the electric bridge sampling, adds to automatic control circuit through the rectification of transformer transformation, integrated voltage stabilizing, constant current, i.e. time alarm relay adhesive, and after ventilation unit was opened time-delay, the valve closer closure was cut off source of the gas, finishes whole course of action.

Fig. 2 is embodiment, and the 220V alternating current is after transformer B transformation, by by diode D ₁-D ₄The bridge rectifier rectification that constitutes, capacitor C ₁Filtering is again through integrated regulator IC ₁And C ₂, C ₃After the voltage stabilizing, for this device provides dc supply, LED ₁Be the power supply green indicating lamp.This installs electric in the monitoring stately.IC ₅And R ₁₈, R ₁₉Constitute constant current source, detecting element G ₁, compensating element, G ₀And resistance R ₂₀, R ₂₁, R _wConstitute bridge diagram, regulate R _wMake bridge balance.When inflammable gas leaks, detecting element G ₁Flameless burning, resistance increases, the electric bridge out of trim, deviation voltage is sent into IC ₄The the 8th and the 9th pin compares and enlarges, after the amplification again with R ₁₅, R ₁₇The dividing potential drop constituent ratio is amplified, IC ₄The 13rd pin output light is reported to the police.By IC ₄The 1st pin output control electric signal makes triode T ₄Saturation conduction, T ₄Collector potential reduces, and exports a voltage signal through coupling capacitor C ₅Add to IC ₃Input end triggers IC ₃Output terminal is high level, relay J ₂Intelligence control valve circuit is connected in work, and intelligence control valve work control executing mechanism is cut off source of the gas, and no matter whether this valve be connected to power supply later, is in closed condition, unless manual reset always.Meanwhile, pass through R ₄Make T ₅Saturation conduction, the language IC circuit ₂Obtain operating voltage, the output language alerting signal is through R ₅With triode T ₃After the amplification, promote loudspeaker and send language alarm.T ₅In the time of saturation conduction, through R ₅And R ₂Give C ₄Charging, C after about 5 seconds ₄Current potential raises and to make T ₂, T ₁Conducting, relay J ₁Adhesive is connected the ventilation unit power supply, J ₁Normally closed contact disconnects after the adhesive, cuts off intelligence control valve current supply circuit.In case solenoid valve is connected heating once more in the short time, avoid accident to enlarge, after finishing when reporting to the police, C ₄Pass through R ₃To T ₂, T ₁Discharge is delayed time the relay adhesive and is afterwards recovered virgin state about about 4 minutes and 30 seconds.When detecting element did not have inflammable gas to invade, electric bridge returned balance, does not produce deviation signal.This device can recover original monitor state automatically.Treat the virgin state of leakage failure eliminating back by manual reset intelligence control valve.

Claims (1)

1. a gas leakage Based Intelligent Control language alarm is made up of automaton and intelligence control valve gear two parts; It is characterized in that: automaton comprises: step-down rectifier, mu balanced circuit, constant-current source circuit, electric bridge sample circuit, comparison amplifying circuit, sound light alarming circuit and triggering delay circuit, described sample circuit constitute bridge diagram by detecting sensing element, compensating element,, resistance and potentiometer; The signal output part of described sample circuit and comparison amplifying circuit IC ₄An input end be connected; By a constant current source is the sample circuit power supply; Described relatively amplifying circuit IC ₄When sample circuit produces deviation voltage, can make to be attached thereto the optical alarm circuit work that connects, make the relay J that is attached thereto ₂On-off circuit IC ₃Work, relay J ₂Work, make relay J ₂The normally opened contact adhesive, connect intelligence control valve circuit, the work of intelligence control valve, control executing mechanism is cut off gas circuit; The valve body tube chamber of described intelligence control valve gear is connected with gas pipeline by screw thread, and control lever is housed on the valve body, and control lever can move up and down in the bar shell; While language alarm IC circuit ₂Work also is triggered; The relay J of control ventilation blower work ₁Be connected with described relatively amplifying circuit control output end by a delay circuit; Relay J ₁Normally closed contact be serially connected in the intelligence control valve current supply circuit, normally opened contact is serially connected in the ventilation blower current supply circuit; The solenoid valve of described smart valve device is provided with a position and lock pin on spool, and corresponding with it pin clamp is arranged on control lever.

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