CN202421789U - Combustible gas leakage protection device - Google Patents
Combustible gas leakage protection device Download PDFInfo
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- CN202421789U CN202421789U CN201120552585XU CN201120552585U CN202421789U CN 202421789 U CN202421789 U CN 202421789U CN 201120552585X U CN201120552585X U CN 201120552585XU CN 201120552585 U CN201120552585 U CN 201120552585U CN 202421789 U CN202421789 U CN 202421789U
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- protective device
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- control signal
- solenoid valve
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Abstract
The utility model belongs to an automatic control device and discloses a combustible gas leakage protection device comprising an executing device used for opening or closing the combustible gas; a gas detector used for detecting the leaked combustible gas; a detecting circuit connected with the combustible gas detector for sending a control signal according to the signal of the gas detector; and a driving unit driving the opening/closing of the executing device according to the control signal of the detecting circuit. Compared with the prior art, the combustible gas leakage protection device disclosed by the utility model has simple structure and sensitive response, and can effectively prevent the combustible gas leakage and improve the application safety of the combustible gas.
Description
Technical field
The utility model relates to a kind of automaton, especially a kind of combustible gas leakage protective device that detects rock gas or liquefied gas.
Background technology
In recent years, be that combustion heater tool such as gas shower, the combustion gas Zhao tool etc. of fuel have appeared among most of families with the inflammable gas.But because the quality problems of these combustion heater tools itself security incident of gas leakage occurs often perhaps owing to user's misoperation.At present China generally uses to such an extent that combustion gas is generally carbon monoxide, alkanes or the potpourri of the two, and these gases are flammable explosive gas still not, but also is toxic gas.Therefore, the gas leakage blast is arranged in China city or rural area often or develop into the naked light fire owing to leaking, the serious accident that causes takes place, even forms a kind of public hazards.
The more existing gas leakage protectors of existing market often adopt relay etc. that the solenoid valve of combustion gas is controlled; When having the combustion gas of leaking in the air; Because relay possibly produce electric spark when action, itself just become a unsafe factor.Even some can detect combustible gas leakage, but can not send alerting signal, also automatic self-closing gas in time, the purpose of protection personal security.
The utility model content
To the deficiency of prior art, the purpose of the utility model be to provide a kind of simple in structure, detect combustible gas leakage protective device accurately.
For realizing above-mentioned purpose, the technical scheme that the described combustible gas leakage protective device of the utility model adopts is following:
A kind of combustible gas leakage protective device, said protective device comprises:
Actuating unit is used for opening or cutting out inflammable gas;
Detector is used to detect the inflammable gas of leakage;
Testing circuit is connected with said detector, sends control signal according to the signal of detector;
Driver element is according to the On/Off of the control signal driving execution device of testing circuit.
Further; Also comprise an alarm module; Said alarm module comprises an oscillator and a hummer, and said oscillator sends oscillator signal according to the control signal that receives, drive the hummer sounding and; Said alarm module also is provided with a luminescent device, and said luminescent device sends light alarm according to control signal.
Concrete, said actuating unit is a solenoid valve, said solenoid valve carries out On/Off according to the control of said driver element.
Further, also comprise a Temperature Detector, be used for the testing environment temperature, and send temperature detection signal.
Further, said testing circuit comprises one first comparer, and this first comparer is exported control signal according to the gas detection signals of detector and/or the temperature detection signal of Temperature Detector.
Preferably; Said driver element comprises the output module of a comparison module and a unblanking according to comparison module output/close; Said comparison module comprises one second comparer and a Darlington transistor; The comparative result that this second comparer is set level according to the level and of the control signal of said testing circuit is exported a signal, and said Darlington transistor is according to this output module of control signal On/Off of this second comparer.
Preferably, said output module comprises a first transistor and transistor seconds, and said Darlington transistor is controlled the conduction and cut-off of transistor seconds through the conduction and cut-off of controlling this first transistor, the power supply of corresponding On/Off solenoid valve.
Preferably; Said output module also comprises a time-delay closing module; This time-delay closing module comprises a polar capacitor, the 3rd transistor, the 4th transistor and the 5th transistor, during the charging of this polar capacitor the 3rd transistor is ended, and makes the 4th transistor turns; Cause the 5th transistor turns, power supply passes through the 5th transistor to solenoid valve; After stopping charging, the 3rd transistor turns makes the 4th transistor end, and causes the 5th transistor to end, and power supply no longer passes through the 5th transistor to solenoid valve.
In the above-mentioned optimal way, the said power module that also comprises, this power module comprises a power supply chip, is used to this protective device stable power is provided.
Further, said power module also comprises charging circuit and rechargable battery group, and said charging circuit is this batteries charging, and said electric battery is used to this protective device power supply.
With respect to prior art; The described combustible gas leakage protective device of the utility model detects the gas that leaks in the air for a long time through detector; Or after detecting temperature anomaly through Temperature Detector; Will in time send the valve that alerting signal is also closed inflammable gas automatically through transistors such as Darlington transistors, play preventing combustible gas leakage automatically; And control circuit thermal values such as Darlington transistor are few, are difficult to occur electric spark, can not ignite or ignite to leak aerial combustion gas, protect the safety of people's life and property; At last, little power consumptions such as the Darlington transistor of said protective device have greatly strengthened the flying power of battery.
For purpose, characteristic and the effect of understanding the utility model fully, below will combine accompanying drawing that the technique effect of design, concrete structure and the generation of the utility model is described further.
Description of drawings
Fig. 1 is the functional block diagram synoptic diagram of the said inflammable gas protective device of the utility model;
Fig. 2 is the circuit diagram of said inflammable gas protective device one specific embodiment of the utility model;
Among the figure:
The 11-detector; The 12-Temperature Detector; The 2-testing circuit; The 3-alarm module; The 4-driver element; The 5-actuating unit.
Embodiment
As depicted in figs. 1 and 2; A kind of combustible gas leakage protective device; Comprise actuating unit 5, detector 11, Temperature Detector 12, testing circuit 2 and driver element 4; Testing circuit 2 is too high according to detector 11 or Temperature Detector 12 detected combustible gas leakages or temperature, just sends signal and gives driver element 4, the valve of driving execution device 5 On/Off inflammable gass.
For timely reminds people, protective device also is provided with an alarm module 3, and alarm module 3 receives and sends sound after the control signal of testing circuit 2 or light signal is reported to the police.See also Fig. 2; Alarm module 3 audible alarms comprise partly that with an oscillator and a hummer as shown in Figure 2, oscillator mainly is made up of an amplifier 4; After testing circuit 2 sent control signal, driving amplifier 4 produced oscillator signal driving honey device and sounds.Further, alarm module 3 also is provided with a luminescent device LED2, and behind the control signal output high level, luminescent device LED2 is luminous, and reminds people notes existing the situation of gas leakage.
Actuating unit 5 opens under the driving of driver element 4 or cuts out combustion gas, can be a solenoid valve YB in this embodiment.Solenoid valve YB gets electric the time, can open gas and flow out automatic self-closing gas in the time of dead electricity.
See also Fig. 2; Has one first comparer 3 in the testing circuit 2; When gas sensor MQ detect combustible gas leakage or temperature detector T01 detect in the testing environment temperature too high after, thereby the inverting input 9 of first comparer 3 that will automatic cutout causes being attached thereto is low level, is lower than the level of normal phase input end 10; Make output terminal 8 export high level, and this high level is exported to alarm module 3 and driver element 4.
The output module that comprises a comparison module and a unblanking according to comparison module output/close in the driver element 4.Comparison module comprises one second comparer, 1 one Darlington transistor B8, and the normal phase input end 3 of this second comparer 3 is connected with the control signal of testing circuit 2, and level is set in input one on the inverting input.
When control signal is high level; The output terminal 1 of second comparer 1 is a high level; Its level is greater than the level of inverting input; The output terminal output high level of second comparer 1, the base stage of the feasible triode B1 that is connected with second comparer, 1 output terminal is a high level, causes its collector and the conducting of the emitter utmost point.Because the emitter of triode B1 is connected with ground, the base stage that makes Darlington transistor B8 is a low level, and Darlington transistor B8 ends, and output module breaks off.When control signal was low level, circuit theory and above-mentioned similar repeated no more at this.
See also Fig. 2, output module is comprising a first transistor B4 and transistor seconds B3.The base stage of this first transistor B4 connects a high level, and emitter is connected with the collector of Darlington transistor B8.When Darlington transistor B8 conducting; Because emitter and the collector conducting of the first transistor B4; Therefore its collector is the same with emitter is low level; The base stage of the transistor seconds B3 that causes being connected with the first transistor B4 collector is a low level, so transistor seconds B3 conducting, and power supply can be through transistor seconds B3 to solenoid valve.When Darlington transistor B8 ended, transistor seconds B3 ended, and power supply can't be through transistor seconds B3 to solenoid valve.Because course of action is similar, repeats no more at this.
Because solenoid valve is a low-voltage solenoid valve, at ordinary times, has certain air pressure in the inflammable gas valve, therefore in the time of opens solenoid valve, need bigger strength to move, its firing current also requires bigger.But in the process after unlatching,, will cause big thermal value and power consumption also big if still be held open electric current; Therefore in actual use; In order to reduce solder joint and thermal value, general requirement is less in the current ratio of keeping solenoid valve, and firing current is then bigger.
In order to improve firing current, in output module, also be provided with a time-delay closing module, this time-delay closing module mainly is made up of polar capacitor C9, the 3rd transistor B7, the 4th transistor B6 and the 5th transistor B5.Moment after protective device powers on; FET B8 is in conducting state, and polar capacitor C9 also is in charged state, can be regarded as short circuit; Therefore the base stage of the 3rd transistor B7 is that low level is in cut-off state; So the base stage of the 4th transistor B6 is a high level, its collector and emitter conducting, the emission of feasible the 5th transistor B5 that is connected with the collector of the 4th transistor B6 is low level very.In this case, the 5th transistor B5 is in conducting state, because emitter and the collector conducting of the 5th transistor B5, power supply can be through the 5th transistor B5 to solenoid valve.
After polar capacitor C9 accomplishes charging; The voltage at polar capacitor C9 two ends raises, and reaches the conducting requirement of the 3rd transistor B7, makes that the base voltage of the 4th transistor B6 is a low level; The 4th transistor B6 is in cut-off state, makes that the 5th transistor B5 is also ended.After the 5th transistor B5 ended, power supply no longer passed through the 5th transistor B5 to solenoid valve, makes solenoid valve be in little current status at the state of keeping.
In order to improve the antijamming capability of protective device; In protective device, also be provided with a power module; Power module comprises a transformer T1 and a voltage stabilizing chip IC 2, at the input end of transformer T1 input civil power, through behind the transformer T1 and use the stable voltage of a voltage stabilizing chip IC 2 outputs.For the combustion gas protective device also can be used when having a power failure, power module also comprises an electric battery and charging circuit.When power down mode, be this combustible gas leakage protective device supply power through electric battery, under the situation that has the civil power input, can also charge to electric battery through charging circuit, improve the flying power of electric battery.
After the inflammable gas protection module powered on, because the time-delay closing module is in opening, output module to solenoid valve YB output current, helped the unlatching of solenoid valve YB through this time-delay closing module.After solenoid valve YB opened, the time-delay closing module was by the output that stops electric current, and solenoid valve YB is in the state of keeping of low current.
To detect airborne gas concentration excessive as gas sensor MQ; Will send the relevant detection signal to testing circuit; Cause the output terminal 8 output high level of first comparer 3, send control signal and come the hummer sounding of control warning module 3 and luminescent device LED2 to send light signal.The high level of first comparer, 3 outputs is behind driver element 4, and control triode B8 ends, and breaks off output module the power supply of solenoid valve YB is supplied with, and solenoid valve YB is automatic self-closing gas under the dead electricity situation, thereby reaches the purpose that prevents combustible gas leakage.
When temperature controller T01 detects temperature in the testing environment when too high; Will send the relevant detection signal; The output terminal 8 output high level that cause first comparer 3; Send control signal and come the hummer sounding of control warning module 3 and luminescent device LED2 to send light signal, situation such as fire possibly appear in report.And the high level of first comparer, 3 outputs is behind driver element 4, and control triode B8 ends; Breaking off output module supplies with the power supply of solenoid valve YB; Solenoid valve YB is automatic self-closing gas under the dead electricity situation, thereby reaches the purpose that prevents combustible gas leakage, and then develops into fire.
Relatively and prior art; The described combustible gas leakage protective device of the utility model circuit structure is simple; Be again that an intrinsically safe circuit adopts transistor to come solenoid valve is carried out the On/Off operation; Heating less and be difficult to produce electric spark, even also safe and reliable in the environment of gas leakage, the combustion gas of can not igniting or ignite; Secondly; This protective device detects sensitive reliable to gas leakage or temperature anomaly; Can send sound and light alarm after detecting combustible gas leakage or temperature anomaly; And close inflammable gas automatically, and can prevent combustible gas leakage effectively, improved the security performance that combustion gas or toxic gas use; At last, under the situation that electricity is arranged, electric battery being charged, under the situation of outage, use electric battery to carry out work, strengthened the security performance and the unfailing performance of system through charging circuit.
More than describe the preferred embodiment of the utility model in detail, the ordinary skill that should be appreciated that this area need not creative work and just can make many modifications and variation according to the design of the utility model.Therefore, all technician in the art according to the utility model design on the prior art basis through logic analysis, reasoning perhaps according to the available technical scheme of limited experiment, all should be among determined protection domain by these claims.
Claims (10)
1. a combustible gas leakage protective device is characterized in that, said protective device comprises:
Actuating unit is used for the On/Off inflammable gas; With
Detector is used to detect the inflammable gas of leakage; With
Testing circuit is connected with said detector, sends control signal according to the signal of detector; And
Driver element is according to the On/Off of the control signal driving execution device of testing circuit.
2. protective device as claimed in claim 1 is characterized in that, also comprises an alarm module, and said alarm module comprises an oscillator and a hummer, and said oscillator sends oscillator signal according to the control signal that receives, and drives the hummer sounding; And said alarm module also is provided with a luminescent device, and said luminescent device sends light alarm according to control signal.
3. protective device as claimed in claim 2 is characterized in that, said actuating unit is a solenoid valve, and said solenoid valve carries out On/Off according to the control of said driver element.
4. protective device as claimed in claim 3 is characterized in that, also comprises a Temperature Detector, is used for the testing environment temperature, and sends temperature detection signal to said testing circuit.
5. protective device as claimed in claim 4 is characterized in that, said testing circuit comprises one first comparer, and this first comparer is exported control signal according to the gas detection signals of detector and/or the temperature detection signal of Temperature Detector.
6. protective device as claimed in claim 5; It is characterized in that; Said driver element comprises the output module of a comparison module and a unblanking according to the output of this comparison module/close; Said comparison module comprises one second comparer and a Darlington transistor, and the comparative result that this second comparer is set level according to the level of the control signal of said testing circuit and is exported a signal, and said Darlington transistor is according to this output module of the output unblanking of this second comparer/close.
7. protective device as claimed in claim 6; It is characterized in that; Said output module comprises a first transistor and transistor seconds; Said Darlington transistor is controlled the conduction and cut-off of transistor seconds through the conduction and cut-off of controlling this first transistor, the power supply of corresponding On/Off solenoid valve.
8. protective device as claimed in claim 7; It is characterized in that said output module also comprises a time-delay closing module, this time-delay closing module comprises a polar capacitor, the 3rd transistor, the 4th transistor and the 5th transistor; During this polar capacitor charging the 3rd transistor is ended; Make the 4th transistor turns to cause the 5th transistor turns that power supply passes through the 5th transistor to solenoid valve; After stopping charging, the 3rd transistor turns makes the 4th transistor end, and causes the 5th transistor to end, and power supply no longer passes through the 5th transistor to solenoid valve.
9. like each described protective device of claim 1 to 8, it is characterized in that, the said power module that also comprises, this power module comprises a power supply chip, is used to this protective device stable power is provided.
10. protective device as claimed in claim 9 is characterized in that, said power module also comprises a charging circuit and rechargable battery group, and said charging circuit is this batteries charging, and said electric battery is used to this protective device power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120552585XU CN202421789U (en) | 2011-12-26 | 2011-12-26 | Combustible gas leakage protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120552585XU CN202421789U (en) | 2011-12-26 | 2011-12-26 | Combustible gas leakage protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202421789U true CN202421789U (en) | 2012-09-05 |
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ID=46746534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120552585XU Expired - Fee Related CN202421789U (en) | 2011-12-26 | 2011-12-26 | Combustible gas leakage protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202421789U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269030A (en) * | 2014-09-25 | 2015-01-07 | 杨柳青 | Fuel gas alarm device with overtemperature detecting function |
| CN111044573A (en) * | 2019-11-28 | 2020-04-21 | 浙江大华技术股份有限公司 | Fault detection circuit and method for gas sensor |
-
2011
- 2011-12-26 CN CN201120552585XU patent/CN202421789U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269030A (en) * | 2014-09-25 | 2015-01-07 | 杨柳青 | Fuel gas alarm device with overtemperature detecting function |
| CN111044573A (en) * | 2019-11-28 | 2020-04-21 | 浙江大华技术股份有限公司 | Fault detection circuit and method for gas sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20141226 |
|
| EXPY | Termination of patent right or utility model |