CN2477936Y

CN2477936Y - Leakage auto protector for combustible gas

Info

Publication number: CN2477936Y
Application number: CN 01214495
Authority: CN
Inventors: 王国伟; 刘文华
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-03-16
Filing date: 2001-03-16
Publication date: 2002-02-20
Anticipated expiration: 2011-03-16

Abstract

The utility model is an automatic protection device for leakage of flammable gases, wherein the bridge-route output end of the gas-sensitive detecting circuit is connected with the input end of the trigger circuit, while the output end of the trigger circuit is connected with the control end of the drive circuit of the solenoid valve; the output end of the solenoid valve drive circuit is connected, concurrently, with the solenoid valve and the delay control end of the power-off and sound-light alarm circuit; the discharge end of the charge and discharge circuit of the emergency lamp is connected with the power source end of the power-off and sound-light alarm circuit. The utility model has the advantages of that: the device not only can disconnect gas source and give alarm, but also can disconnect city power supply; besides, the utility model provides explosion-proof low pressure emergency illumination of large a safety factor to facilitate fast treatment of leakage faults.

Description

Inflammable gas leaks automatic safety device

The utility model is that a kind of inflammable gas leaks automatic safety device.

Existing inflammable gas protector such as explosion-proof type inflammable gas protector can be surveyed inflammable gas leakage and air pressure deficiency and be difficult to keep dangerous phenomenons such as burning, and can cut off source of the gas, send acoustooptic alarm simultaneously, and circuit also has certain explosion prevention function.But they can not cut off the civil power of this environment when cutting off source of the gas and warning, provide the low pressure emergency lighting for fixing a breakdown use and accomplish thoroughly explosion-proof.

When the purpose of this utility model is to provide a kind of inflammable gas to leak; can cut off source of the gas and send acoustooptic alarm; can cut off this environment civil power again; provide the emergency lighting of explosion-proof type low pressure simultaneously, no matter leak the inflammable gas leakage automatic safety device that occurs in daytime or can both handle leakage failure night smoothly.

Structure of the present utility model is seen Fig. 1: include power circuit 1, air-sensitive detection circuit 2, trigger circuit 3, driving circuit for electromagnetic valve 4, outage and sound light alarming circuit 5, the flare-up light charge-discharge circuit 6 and the solenoid valve 7 that contain flare-up light and battery, the bridge circuit output terminal of air-sensitive detection circuit 2 links to each other with the input end of trigger circuit 3, the output terminal of trigger circuit 3 links to each other with the control end of driving circuit for electromagnetic valve 4, the output terminal while and the solenoid valve 7 of driving circuit for electromagnetic valve 4, the time-delay control end of outage and sound light alarming circuit 5 links to each other, the discharge end of flare-up light charge-discharge circuit 6 links to each other with the power end of outage and sound light alarming circuit 5, the input end of power circuit 1 link to each other with civil power and output terminal respectively with air-sensitive detection circuit 2, trigger circuit 3, driving circuit for electromagnetic valve 4, the power end of flare-up light charge-discharge circuit 6 links to each other.Above-mentioned each circuit unit belongs to electronic technology and electrician's universal circuit, by those skilled in the art are known.

Working principle: when combustible gas leakage, air-sensitive detection circuit 2 sends alarm signal, through trigger circuit 3 output terminals output high level, remove to trigger driving circuit for electromagnetic valve 4, make solenoid valve 7 actions and cut off source of the gas, and after solenoid valve 7 actions is self-locking, and this moment, trigger signal disappeared, and solenoid valve 7 can not automatically reset yet.The high level of driving circuit for electromagnetic valve 4 output terminals output removes to drive outage and sound light alarming circuit 5 after time-delay, outage back flare-up light is lighted immediately, and outage and sound light alarming circuit 5 are by the powered battery of flare-up light at this moment, and this circuit works on, carry out outage, the acoustooptic alarm instruction.

The utility model has the advantages that: can cut off source of the gas and warning, can cut off civil power again, and the emergency lighting of explosion-proof type low pressure can be provided, safety coefficient is big, and helps handling smoothly leakage failure.

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 embodiment's circuit theory diagrams.

Embodiment: see Fig. 2.Air-sensitive detection circuit 2 adopts the air-sensitive propagated sensation sensor G of ceramic semiconductors technology to survey the leakage of inflammable gas.According to after being detected inflammable gas and reaching finite concentration, the principle that the resistance value of sensor descends rapidly, by having the bridge circuit output alarm voltage signal of temperature compensation function, after this alarm voltage signal process trigger circuit level conversion, output has the high voltage of certain triggering ability, remove to trigger driving circuit for electromagnetic valve 4, after driving circuit for electromagnetic valve 4 is triggered, solenoid valve 7 actions, valve closing, thus cut off source of the gas, solenoid valve 7 self-lockings simultaneously, solenoid valve 7 makes it to be in normally off, even after trigger signal disappeared, still can not be opened automatically.The high level that drives solenoid valve is after delaying time 1 second; remove to trigger outage and sound light alarming circuit 5; after this circuit is triggered; cut off this protective gear and controlled this environment electric main immediately; send acoustooptic alarm simultaneously; outage back flare-up light is lighted automatically, and driving circuit for electromagnetic valve 4 is supplied direct current, reaches the purpose that continues warning, outage.Behind artificial eliminating leakage failure, by the therapeutic method to keep the adverse qi flowing downward, reply a button S and a K by cable respectively, can recover the air feed power supply, to remove simultaneously and report to the police, flare-up light changes charged state automatically over to, and this protector is in the detection operations state again.When having a power failure, flare-up light charge-discharge circuit 6 is transformed into discharge condition automatically, and flare-up light is bright, though keep supplying power supply also for driving circuit for electromagnetic valve 4, reports to the police and protects number triggering, so driving circuit for electromagnetic valve 4 is not worked, device is in outage state.Flare-up light charging circuit 6 is a closed circuit, by detecting cell voltage, and utilizes the height of cell voltage, the size of control charging current.When battery be charged to its capacity 90% the time, charging stops, during discharge, when cell voltage dropped to 5.8V, discharge stopped.By above measure, strong protection battery, prolonged its working life, cooperate the work of driving circuit for electromagnetic valve 4 better.

Among Fig. 2: F is a protective tube, and BY is a transformer, and Z is the rectifier bridge heap, C1-C5 is a capacitor, and D1, D6, D7 are reference diode, and D4, D11, D12, D8, D9, D5 and D13 are general-purpose diode, D10, D14 and D2 are light emitting diode, T1-T5 is a triode, and IC is the CD4011B intergrated circuit, and R1-R15 is a resistor, G is a gas-sensing probe, FM is a buzzer, and E is solenoid valve (the QBY-1K moulded coal feed channel safety valve that adopts SiChuan, Chengdu culture Industrial Co., Ltd. to produce), and B is a battery.J1-J4 is a relay, and C is an A.C. contactor, and K is the battery reset switch, ZJ ₁, ZJ ₂, ZJ ' ₂, ZJ ₃, ZJ ' ₃Be relay contact, K ₁Be the flare-up light switch, Y is the bulb of flare-up light, K ₂For detecting emergent lamp switch.Circuit is corresponding to the circuit of identical numbering among Fig. 1 in the frame of broken lines that band is numbered separately among Fig. 2.

This protective gear is provided with gas, replies a button by cable; in case after the action; source of the gas has only after the manual reset operation, could open, and power supply is open-minded immediately behind manual reset; if there is not manual reset; power supply is automatic recovery of power supply after eight hours, after restoring electricity, cancels during acoustooptic alarm; flare-up light extinguishes, and this protector is located the detection operations state again.This protector does not also have the autoprotection device, avoids supply variation big, or the issuable blast of the fault of circuit own.

After this product adopts automatic circuit break function; when more effectively having guaranteed flammable gas leakage; can not open by mistake electric light, electrical equipment and cause explosion risk; device is in outage state simultaneously; both using electricity wisely and protective circuits itself; improved the safe emergency lighting of lighting automatically at this environmentAL safety coefficient, especially night again and provide convenience for getting rid of to leak.

In a word, this product has following characteristics:

1, totally-enclosed design is adopted in a small amount of contact of having of circuit, when inflammable gas leaks, die earlier, and the back outage, safety coefficient is big.

2, the flare-up light charging circuit is designed to closed circuit, and battery can not overcharge, and discharge circuit is not automatically protection also, can over-discharge can, guarantee that the battery long lifetime uses.During power failure, flare-up light is lighted automatically, but does not have actuation of an alarm.When restoring electricity, flare-up light extinguishes automatically, and changes charged state over to.

3, power consumption is low, 3 watts of complete machine consumed power less thaies, and operating cost is low.

When 4, inflammable gas leaks night, under the prerequisite that can not open other lamps, automatic emergency lighting is arranged, convenient and safe when discharging fault.

5, simple and reasonable, easy to operate simple, with low cost, be applicable to family and the place of alkanes gas, carbon monoxide is arranged.

More than implement profit only for the utility model is further described, and scope of the present utility model is not subjected to the limitation of illustrated embodiment.

Claims

1; a kind of inflammable gas leaks automatic safety device; it is characterized in that: include power circuit (1); air-sensitive detection circuit (2); trigger circuit (3); driving circuit for electromagnetic valve (4); outage and sound light alarming circuit (5); the flare-up light charge-discharge circuit (6) and the solenoid valve (7) that contain flare-up light and battery; the bridge circuit output terminal of air-sensitive detection circuit (2) links to each other with the input end of trigger circuit (3); the output terminal of trigger circuit (3) links to each other with the control end of driving circuit for electromagnetic valve (4); output terminal while and solenoid valve (7) of driving circuit for electromagnetic valve (4); the time-delay control end of outage and sound light alarming circuit (5) links to each other; the discharge end of flare-up light charge-discharge circuit (6) links to each other with the power end of outage and sound light alarming circuit (5), the input end of power circuit (1) link to each other with civil power and output terminal respectively with air-sensitive detection circuit (2); trigger circuit (3); driving circuit for electromagnetic valve (4); the power end of flare-up light charge-discharge circuit (6) links to each other.

2, leak automatic safety device as the said inflammable gas of claim 1, it is characterized in that adopting in the air-sensitive detection circuit (2) the air-sensitive propagated sensation sensor of ceramic semiconductors technology.

3, leak automatic safety device as the said inflammable gas of claim 1, it is characterized in that flare-up light charging circuit (6) is a closed circuit.

4, leak automatic safety device as the said inflammable gas of claim 1, it is characterized in that being provided with gas, reply a button by cable.