CN2337620Y - Safety protective alarming device for gas pipeline and natural gas pipeline - Google Patents

Abstract

The utility model relates to a safety protective alarming device for gas pipelines and natural gas pipelines. The utility model is composed of a transformer, a bridge-type rectifier, a voltage stabilizer, a sensor, a drive circuit, an integrated circuit switch, an acoustic-optic alarm device, etc. The utility model has the advantages of high safety, small size, low working voltage, and less power consumption. Besides, the utility model is not easy to damage.

Description

Gas piping, natural gas pipe safeguard protection warning device

The utility model relates to a kind of electronic alarm device, and alarm device is protected in particularly a kind of gas piping, natural gas pipe safeguard protection.

The gas leak detector of being seen is to belong to the first generation and second generation product in the market.First generation product has flashing light alarm, functions such as audible alarm, and function is few, still has unsafe factor, can not work long hours.Second generation product has flashing light alarm, audible alarm, open vent fan and turn off the function of general solenoid valve, and volume is big, the operating voltage height, and dangerous big, power consumption is big, shortcomings such as cost height.

The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art; a kind of gas piping, natural gas pipe safeguard protection warning device are proposed; adopt the driving circuit and the integrated circuit switch of improved impulse electromagnetic valve and impulse electromagnetic valve; have safe and reliable, volume is little, operating voltage is low, little power consumption, does not allow flimsy characteristics.

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

Fig. 2 is an embodiment of the present utility model.

Below in conjunction with accompanying drawing structural principle of the present utility model and principle of work are elaborated.

Referring to Fig. 1, the utility model comprises a transformer (1), the output of transformer (1) links to each other with the input of bridge rectifier (2), and the output of bridge rectifier (2) links to each other with the input of voltage stabilizer (3) with voltage stabilizer (4), and the output of voltage stabilizer (3) links to each other with sensor (5); Voltage stabilizer (4) provides power supply for other components and parts of complete machine; The output of sensor (5) links to each other with control integrated circuit (8) input, (6) be that another input end of delay circuit and control integrated circuit (8) links to each other, the output terminal of control integrated circuit (8) links to each other with the input end of the driving circuit (7) of impulse electromagnetic valve (10), also the input end with flash alarm circuit (11) links to each other, control integrated circuit (8) links to each other with the input end of integrated circuit switch (9), and integrated circuit switch (9) links to each other with the input end of vent fan (12) and the input end of hummer (13).

After exchanging 220 volts of power supplys process transformers (1), produce and exchange low-voltage, behind bridge rectifier (2), produce unidirectional low-voltage, behind voltage stabilizer (3) and voltage stabilizer (4), produce two groups of 5 volts of DC voltage, one group of voltage stabilizer (3) supply sensor, another group voltage stabilizer (4) is supplied with other components and parts voltage of complete machine to be needed.

After the start,, behind delay circuit (6), during with the assurance start, can not produce false alarm in order to prevent misoperation.In case coal gas and natural gas leak, when reaching alarming line, control integrated circuit (8) has voltage output, 1) make the LED flash of flashing light alarm (11); 2) integrated circuit switch 9 is opened, high loudness chimes of doom or fire-fighting sound etc. take place after obtaining 5 volts of voltages in hummer (13); The pilot relay work of vent fan (12), vent fan is opened.3) make input driving circuit (7) picked up signal of impulse electromagnetic valve, impulse electromagnetic valve (10) automatically shuts down, so gas piping and natural gas pipe automatically shut down.

Referring to Fig. 2, exchanging 220 volts of power supplys is connected with transformer T is elementary by fuse FS1, transformer secondary output is connected with bridge rectifier IC1 input end, and the output terminal of bridge rectifier IC1 is connected by the input end (1) of fuse and voltage stabilizer IC2, voltage stabilizer IC3 and voltage stabilizer IC3.The output terminal of voltage stabilizer IC3 (2) is connected with f1, f2 and A, the B end of sensor QM.The output terminal of voltage stabilizer IC2 is connected with the power end of other components and parts.The output terminal B of sensor QM, the tap by R1 and W is connected with the input end (2) of control integrated circuit IC4.The output terminal of delay circuit D1, R2, C4 is connected with the input end of IC4 (1).The 1st output terminal of IC4 is connected with driving circuit R3, C6, R4 and the BG1 of impulse electromagnetic valve MT.The 2nd output terminal (4) of IC4 is connected with the input end (5) of integrated circuit switch IC5 by R7, C7, and the output terminal of IC5 (2) is connected with the relay J of control vent fan and the input end of hummer F.Exchanging the normal opened contact J1 of 220 volts of power supplys by relay J is connected with exhaust fan.Pullswitch S and J1 parallel connection are so that manually control vent fan.

The 4th output terminal (1) of control integrated circuit IC4 is connected with flash alarm circuit R8, BG2, R9 and D4.

The output terminal 2 of voltage stabilizer IC2 is connected with power supply indication D5 (LED) by R10.

Present embodiment has considered that this device is in running order all the year round; in order to ensure family's security of the lives and property; adopt the work of AC and DC dual fail-safe silk; no matter be exchange or direct current which partly take place undesired; surpass rated current 50%; fuse should fuse, and reaches safety, reliably protecting effect.

Transformer T is elementary to insert 220 volts of AC Power supply socket by fuse and lead, obtains 220 volts of AC power, and T level of transformer obtains to exchange low-voltage.Exchange low-voltage by behind the bridge rectifier IC1QL51B, produce a unidirectional pulsating volage of low pressure, connect through fuse FS2 and C1, C1 is connected with IC3 and capacitor C2, C3 with voltage stabilizer IC2, IC2 and IC3 are three terminal regulators 7805, produce two 5 volts of DC voltage, 5 volts of voltages of voltage stabilizer IC3 are supplied with sensor QM heat filament f1f2 and A, B terminal voltage.5 volts of voltages of another group voltage stabilizer IC2 are supplied with the voltage needs of other components and parts.

The B end of sensor QM links to each other with 2 pin of control integrated circuit IC4CD4011 with R1 by potentiometer W.When coal gas, natural gas leakage, internal resistance reduces between the AB of sensor QM, and the electric current that flows through between A, B increases, voltage in the tap of potentiometer W increases, when voltage is raised to the threshold voltage of gate circuit, gate circuit " upset ", 3 pin of IC4 drop to level "0" by level"1".Because 3 pin of IC4 are connected to 5 pin and 6 pin, so the 2nd gate output 4 pin rise to level"1" by level "0".3 pin of IC4 are connected with R3, C6, R4 and BG1 again, when 3 pin drop to level "0" by level"1", because C6, the R4 differential action, produce a pulse voltage and make the BG1 conducting, impulse electromagnetic valve MT obtains electric current, impulse electromagnetic valve MT moment shuts, so gas piping and natural gas pipe are closed.Can take the way that resets manually, the handle that resets of pulse solenoid valve MT is extracted impulse electromagnetic valve MT conducting again.

After 4 pin of IC4 rise to level"1", postpone by R7C7, can not shake when making integrated circuit switch IC5 conducting reliably make the normal opened contact J1 adhesive of relay J, 5 volts of voltages of the output terminal of integrated circuit switch IC5 (2) end output, (1) relay J is sucted, the normal opened contact J1 closure of relay J, vent fan B has had voltage, the vent fan running is discharged the coal gas in kitchen outside the room.2) make hummer F obtain voltage, hummer sends high loudness chimes of doom, and reminds people is noted, coal gas (natural gas) has taken place leaked, and hastens to check and take measures, to guarantee safety of life and property.

It is 1HZ/ about second that the 3rd and 4 gate circuits of R5, R6 and C5 and IC4 constitute LFO Frequency, when 8 pin of IC4 are level"1", and the LF oscillator vibration, 11 pin output low frequency 1HZ/ signals second of IC4, R8 and BG2 constitute on-off circuit.When the 11 pin output low frequency signals of IC4, close when logical during BG2, D4LED just glistens, and reminds people is noted, gas leak has taken place.

With the switch S of relay J normal opened contact J1 parallel connection be manual pullswitch, when needs, can artificially spur pullswitch S, just can open vent fan.

The utility model makes circuit reliable more, not fragile safely owing to adopt up-to-date components and parts and the design of dual fail-safe silk.Low, the low price of cost is well suited for family and uses.

Because adopt novel impulse electromagnetic valve, volume is small and exquisite, and is in light weight, low in energy consumption (＜0.5W) low voltage operating so have explosion prevention function, turn-offs reliable.

After using integrated circuit switch IC5: 1) internal resistance reduces, and supplies with hummer voltage and increases, and reports to the police so hummer (police whistle sound, fire-fighting sound) sends high loudness, in case gas leak causes that at once personnel note.2) integrated switch power is big, and is reliable, is not easy to damage, and it is more reliable to supply with relay J voltage, guarantees the vent fan reliably working.

Claims (2)

1. gas pipeline; natural gas pipe safeguard protection warning device; comprise a transformer (1); the output of transformer (1) links to each other with the input of bridge rectifier (2); the output of bridge rectifier (2) links to each other with the input of voltage stabilizer (3) with voltage stabilizer (4); feature of the present utility model is; the output of voltage stabilizer (3) links to each other with sensor (5); the output of sensor (5) links to each other with control integrated circuit (8) input; (6) be delay circuit; link to each other with another input end of control integrated circuit (8); the output terminal of control integrated circuit (8) links to each other with the input end of the driving circuit (7) of impulse electromagnetic valve (10); also the input end with flash alarm circuit (11) links to each other; control integrated circuit (8) links to each other with the input end of integrated circuit switch (9), and integrated circuit switch (9) links to each other with the input end of vent fan (12) and the input end of hummer (13).

2. device according to claim 1, it is characterized in that, secondary and the bridge rectifier IC1 input end of transformer (1) is connected, the output terminal of bridge rectifier IC1 is by fuse and voltage stabilizer IC2, the input end of voltage stabilizer IC3 and voltage stabilizer IC3 (1) is connected, the f1 of the output terminal of voltage stabilizer IC3 (2) and sensor QM, f2 and A, the B end is connected, the output terminal of voltage stabilizer IC2 is connected with the power end of other components and parts, the output terminal B of sensor QM, tap by R1 and W is connected with the input end (2) of control integrated circuit IC4, delay circuit D1, R2, the output terminal of C4 is connected with the input end of IC4 (1), the 1st output terminal of IC4 and the driving circuit R3 of impulse electromagnetic valve MT, C6, R4 is connected with BG1, the 2nd output terminal (4) of IC4 passes through R7, C7 is connected with the input end (5) of integrated circuit switch IC5, the output terminal of IC5 (2) is connected with the relay J of control vent fan and the input end of hummer F, exchange the normal opened contact J1 of 220 volts of power supplys by relay J and be connected pullswitch S and J1 parallel connection with exhaust fan.

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