CN2554490Y

CN2554490Y - Gas Safety device

Info

Publication number: CN2554490Y
Application number: CN 02271699
Authority: CN
Inventors: 萧成定
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-07-12
Filing date: 2002-07-12
Publication date: 2003-06-04
Anticipated expiration: 2012-07-12

Abstract

The utility model discloses a gas safety device, which comprises a power source, a gas leakage detecting circuit, an audible and visual alarm circuit, an electronic switch, a timing circuit and a gas special-purpose electromagnetic valve. The output terminal of the power source is connected with the power source input terminal of the component elements through the electronic switch; the output terminals of the timing circuit and the gas leakage detecting circuit are connected with the input terminal of the audible and visual alarm circuit, and the output terminal of the gas leakage detecting circuit is also connected with the loop of the power source; the control signal output terminal of the audible and visual alarm circuit is connected with the control input terminal of the electronic switch, and the control output terminal is connected with the loop of the power source. The utility model can time the gas used and can automatically close the air source and the power source, and is safe and energy saving.

Description

Gas safety device

Affiliated technical field

The utility model relates to a kind of energy-saving multifunction gas safety device.

Background technology

Present existing Fuel Gas Leak Alarm, form by combustion gas detecting device, audible-visual annunciator and vent fan starting switch mostly, for example the People's Telecon Publishing House published in 96 years, the second impression in April, 99, the 110th page 27 examples in " alarm integrated circuit and alarm example of making " book that Chen Youqing, Zhang Xiaodong are write: and this society publishes in October, 99, example in the 178-180 page or leaf of " the sensor utility unit is made the system collection of choice specimens " book of Chen Ershao chief editor, all do not have timing usefulness gas and automatically shut down the function of source of the gas power supply, thereby actual use value is little.

The utility model content

The energy-saving multifunction gas safety device that the purpose of this utility model is to provide a kind of Timing usefulness gas and can closes source of the gas, power supply automatically.

The purpose of this utility model can realize by following technical measures: comprise power supply, gas leakage testing circuit and sound light alarming circuit, it is characterized in that: also comprise electronic switch, timing circuit and gas electromagnetic valve, the output terminal of power supply links to each other with the power input of above-mentioned each ingredient through electronic switch; The output terminal of timing circuit and gas leakage testing circuit all links to each other with the input end of sound light alarming circuit, and the output terminal of gas leakage testing circuit also inserts in the electric power loop of gas electromagnetic valve; The control signal output ends of sound light alarming circuit links to each other with the control input end of electronic switch, and the control output end of electronic switch is inserted in the electric power loop.Control electronic switch by the time set of timing circuit and cut off the electricity supply, thus the automatic self-closing gas solenoid valve, and alarm, realize timing gas; After the gas leakage detection alarm, the same output signal control of warning circuit electronic switch is cut off the electricity supply, and is not only safe but also energy-conservation in addition.

Electronic switch described in the utility model comprises triode V1, V2, resistance R 1, R3, capacitor C 5 and relay K A1, the emitter-base bandgap grading of triode V1 connects power output end, also link to each other with the base stage of triode V2 simultaneously through capacitor C 5, resistance R 1, the base stage of triode V1 links to each other through the collector of resistance R 3 with triode V2, and relay K A1 is connected between the emitter of the collector of triode V1 and triode V2; Wherein the base stage of triode V2 is the control input end of electronic switch, and the connecting terminal of relay K A1 is the control output end of electronic switch.

Base chip IC 1, counting chip IC2, IC3, coding chip IC4, IC5 and two seven segment digital tubes when timing circuit described in the utility model comprises, the time base chip count pulse that produced through counting chip counting, coding chip decoding back by seven segment digital tubes demonstration gate time; Wherein two output pins of counting chip IC2, IC3 are that timing circuit inserts sound light alarming circuit output link.

Gas electromagnetic valve described in the utility model comprises valve body, air chamber, solenoid, iron core and spring, air intake opening in air chamber and the valve body communicates, air chamber communicates with gas outlet in the valve body through valve, solenoid is solidly set on gas chamber outer wall, iron core and spring place in the air chamber, iron core on valve, is provided with O-ring seal by the spring roof pressure between valve and iron core.Because the thrust of spring, push iron core the valve of gas off-take to, its embedded block rubber is pressed on the valve, form tight closed level, in case when opening the cylinder for liquefied gas main valve, liquefied gas enters air chamber, gaseous-pressure in the steel cylinder reaches the iron core upper end, thereby increased the pressure of iron core, pressed tightlyer after the solenoid energising, produced powerful electromagnetic field valve, iron core is upwards drawn, valve is opened, and combustion gas just flows to gas off-take from air intake duct through air chamber, outwards air feed.In case coil blackout, spring force is pushed iron core to valve immediately, closes combustion gas.

Be provided with the warning timing circuit in the sound light alarming circuit described in the utility model, the warning timing circuit mainly is made of time base chip IC 7 and peripheral resistance capacitance thereof, the time base chip IC 7 the oscillating impulse output terminal be the control signal output ends of this sound light alarming circuit.When the current potential of its output during by high step-down, electronic switch cuts out, and cuts off the electricity supply, and stops air feed.

As to further improvement of the utility model, be provided with gas sensor in the described gas leakage testing circuit and damage testing circuit, this circuit is made up of voltage stabilizing diode DW, diode D8, D9, D10, the negative electrode of voltage stabilizing diode DW is connected to gas sensor, and the anode of voltage stabilizing diode DW is connected on the sound light alarming circuit through diode D8, D9, D10 respectively.When the gas sensor internal damage ruptured, voltage stabilizing diode DW can be breakdown, triggers warning through diode D8, D9, D10.

The utility model compared with prior art has following advantage: 1, because the utility model is provided with electronic switch, timing circuit and gas electromagnetic valve, controlling electronic switch by the time set of timing circuit cuts off the electricity supply, thereby automatic self-closing gas solenoid valve, and alarm, needs that like this can be according to circumstances, at any time setting-up time is realized timing gas; 2, after the gas leakage detection alarm, the same output signal control of warning circuit electronic switch is cut off the electricity supply, and is not only safe but also energy-conservation; 3, damage testing circuit owing to be provided with gas sensor, under the situation that gas sensor damages, still can report to the police, and control electronic switch automatically and cut off the electricity supply and close gas electromagnetic valve, guarantee safety.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is further described.

Fig. 1 is a functional-block diagram of the present utility model;

Fig. 2 is the wherein circuit theory diagrams of an embodiment of the utility model;

Fig. 3 is the structural representation of gas electromagnetic valve in the utility model.

Embodiment

As shown in Figure 1, the utility model comprises power supply, gas leakage testing circuit, sound light alarming circuit, electronic switch, timing circuit and gas electromagnetic valve, and the output terminal of power supply links to each other with the power input of above-mentioned each ingredient through electronic switch; The output terminal of timing circuit and gas leakage testing circuit all links to each other with the input end of sound light alarming circuit, and the output terminal of gas leakage testing circuit also inserts in the electric power loop of gas electromagnetic valve; The control signal output ends of sound light alarming circuit links to each other with the control input end of electronic switch, in the control output end cut-in operation electric power loop of electronic switch.

As shown in Figure 2, electronic switch comprises triode V1, V2, resistance R 1, R3, capacitor C 5 and relay K A1, the emitter-base bandgap grading of triode V1 connects power output end, the emitter-base bandgap grading of triode V1 also links to each other with the base stage of triode V2 through capacitor C 5, resistance R 1, the base stage of triode V1 links to each other through the collector of resistance R 3 with triode V2, and relay K A1 is connected between the emitter of the collector of triode V1 and triode V2; Wherein the base stage of triode V2 is the control input end of electronic switch, and the connecting terminal of relay K A1 inserts in the primary return of 220V ac power transformer.

Timing circuit comprises that model is that time base chip IC 1, the model of NE555 is 4017 counting chip IC2, IC3, coding chip IC4, IC5 and two seven segment digital tubes that model is CH-208, the time base chip count pulse that produced through counting chip counting, coding chip decoding back by seven segment digital tubes demonstration gate time; Counting chip IC2, IC3 output pin Q9 separately is the output link that timing circuit inserts sound light alarming circuit.

Be provided with the warning timing circuit in the sound light alarming circuit, the warning timing circuit is that time base chip IC 7 and the peripheral resistance capacitance thereof of NE555 constitutes by model mainly, the oscillating impulse output terminal Q of time base chip IC 7 is the control signal output ends of this sound light alarming circuit, and pulse output end Q receives the base stage of the triode V2 in the electronic switch.The gas leakage testing circuit mainly is made of by low power amplifier IC6A, the comparer IC6B of LM358 gas sensor MP211, type; Be provided with gas sensor in the gas leakage testing circuit and damage testing circuit, this circuit is made up of voltage stabilizing diode DW, diode D8, D9, D10, the negative electrode of voltage stabilizing diode DW is connected to the f1 pin of gas sensor MQ211, and the anode of voltage stabilizing diode DW is connected on the sound light alarming circuit through diode D8, D9, D10 respectively.

As shown in Figure 3, gas electromagnetic valve comprises valve body 6, air chamber 3, solenoid 1, iron core 4 and spring 2, air intake duct 11 in the air chamber valve body 6 communicates, air chamber 3 communicates with gas off-take 10 in the valve body through valve A, solenoid 1 is solidly set on air chamber 3 outer walls, iron core 4 and spring 2 place in the air chamber 3, and iron core 4 on valve A, is provided with O-ring seal 7 by spring 2 roof pressures between valve A and iron core 4.Because the thrust of spring, push iron core the valve of gas off-take to, its embedded block rubber is pressed on the valve, form tight closed level, in case when opening the cylinder for liquefied gas main valve, liquefied gas enters air chamber, gaseous-pressure in the steel cylinder reaches the iron core upper end, thereby increased the pressure of iron core, pressed tightlyer after the solenoid energising, produced powerful electromagnetic field valve, iron core is upwards drawn, valve is opened, and combustion gas just flows to gas off-take from air intake duct through air chamber, outwards air feed.In case coil blackout, spring force is pushed iron core to valve immediately, closes combustion gas.

In conjunction with Fig. 2 its principle of work is made an explanation again, electronic switch is supplied with subsequent conditioning circuit 5.7V supply voltage, and make relay K A1 adhesive, AC power is carried out self-locking, electronic switch is then by the 5.7V voltage of self exporting, through resistance R 26, R27, diode D15 or feed back to the self-locking of triode V2 base stage through diode D16 through the noble potential of the oscillating impulse output terminal Q of time base chip IC 7 output.Arrive when the time comes when the time that timer preset, two counting chip IC2, IC3 output pin Q9 separately all is noble potential, make triode V3, V4 saturated by diode D11, D12, the green light of LED 2 is bright, and by diode D13, resistance R 25 makes triode V6, V9 saturated, hummer HA sends 1 minute chimes of doom, when chip IC 7 enters its output pin of stable state Q and becomes electronegative potential when alarm limit, electronic switch turn-offs, relay K A1 cuts off AC power, and all circuit quits work, and gas electromagnetic valve also turn-offs source of the gas.

When gas sensor MQ211 senses gas leakage, its g2 utmost point produces signal voltage, amplify output through operational amplifier IC6A low power, deliver to the in-phase input end of comparer IC6B through resistance R 17, because this voltage surpasses 5V, and the comparative voltage of comparer IC6B inverting input has only 3.92V, so upset immediately, IC6B sends noble potential by comparer, through diode D7, resistance R 21 makes triode V5 saturated, so the red light of LED 2 is lighted, relay K A2 adhesive, start vent fan, and by resistance R 29 the saturated triode V7 of triode V8 is ended, gas electromagnetic valve YV discharges the shutoff source of the gas immediately.Make triode V6, V9 saturated by diode D14, resistance R 25 simultaneously, hummer HA sounding alarm 1 minute, when chip IC 7 entered its output pin of stable state Q and becomes electronegative potential when alarm limit, electronic switch turn-offed, relay K A1 cuts off AC power, and all circuit quits work.

When the inner heater strip of gas sensor MQ211 damages fracture, gas sensor f1 terminal voltage is up to 5.7V, puncture voltage stabilizing diode DW, make triode V3, V4, V5 saturated respectively through diode D8, D9, D10, red, green light in the LED 2 are lighted simultaneously and be orange, and all the other and leakage alarm process are identical.

Claims

1, a kind of gas safety device, comprise power supply, gas leakage testing circuit and sound light alarming circuit, it is characterized in that: also comprise electronic switch, timing circuit and gas electromagnetic valve, the output terminal of power supply links to each other with the power input of above-mentioned each ingredient through electronic switch; The output terminal of timing circuit and gas leakage testing circuit all links to each other with the input end of sound light alarming circuit, and the output terminal of gas leakage testing circuit also inserts in the electric power loop of gas electromagnetic valve; The control signal output ends of sound light alarming circuit links to each other with the control input end of electronic switch, and the control output end of electronic switch is inserted in the electric power loop.

2, gas safety device according to claim 1, it is characterized in that: described electronic switch comprises triode (V1, V2), resistance (R1, R3), electric capacity (C5) and relay (KA1), the emitter-base bandgap grading of triode (V1) connects power output end, the emitter-base bandgap grading of triode (V1) also links to each other with the base stage of triode (V2) through electric capacity (C5), resistance (R1), the base stage of triode (V1) links to each other through the collector of resistance (R3) with triode (V2), and relay (KA1) is connected between the emitter of the collector of triode (V1) and triode (V2); Wherein the base stage of triode (V2) is the control input end of electronic switch, and the connecting terminal of relay (KA1) is the control output end of electronic switch.

3, gas safety device according to claim 1, it is characterized in that: base chip (IC1), counting chip (IC2, IC3), coding chip (IC4, IC5) and two seven segment digital tubes when described timing circuit comprises, the time base chip count pulse that produced through counting chip counting, coding chip decoding back by seven segment digital tubes demonstration gate time; Counting chip (IC2, IC3) output pin (Q9) separately inserts the output link of sound light alarming circuit for timing circuit.

4, gas safety device according to claim 1, it is characterized in that: described gas electromagnetic valve comprises valve body (6), air chamber (3), solenoid (1), iron core (4) and spring (2), air intake duct (11) in air chamber (3) and the valve body (6) communicates, air chamber (3) communicates with gas off-take (10) in the valve body through valve (A), solenoid (1) is solidly set on air chamber (3) outer wall, iron core (4) and spring (2) place in the air chamber (3), iron core (4) on valve (A), is provided with O-ring seal (7) by spring (2) roof pressure between valve (A) and iron core (4).

5, gas safety device according to claim 1, it is characterized in that: described sound light alarming circuit is provided with the warning timing circuit, the warning timing circuit mainly is made of time base chip (IC7) and peripheral resistance capacitance thereof, the time base chip (IC7) the oscillating impulse output terminal be the control signal output ends of this sound light alarming circuit.

6, gas safety device according to claim 1, it is characterized in that: be provided with the air-sensitive sensing circuit in the described gas leakage testing circuit and damage testing circuit, this circuit has voltage stabilizing diode (DW), diode (D8, D9, D10) to form, the negative electrode of voltage stabilizing diode (DW) is connected to the air-sensitive sensing circuit, and the anode of voltage stabilizing diode (DW) is connected on the sound light alarming circuit through diode (D8, D9, D10) respectively.