CN2052470U - Solenoid valve for automatic cutting off gas - Google Patents
Solenoid valve for automatic cutting off gas Download PDFInfo
- Publication number
- CN2052470U CN2052470U CN 88212834 CN88212834U CN2052470U CN 2052470 U CN2052470 U CN 2052470U CN 88212834 CN88212834 CN 88212834 CN 88212834 U CN88212834 U CN 88212834U CN 2052470 U CN2052470 U CN 2052470U
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- China
- Prior art keywords
- gas
- circuit
- arched arm
- solenoid valve
- bull stick
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model comprises a solenoid valve for automatic cutting off gas and a warning timer for automatic cutting off gas using the solenoid valve. The solenoid valve comprises a rotary shaft type gas valve, a crossbow mechanism and an electric magnet. The simple structure; the process is easy; the cost is low; the gas source can be reliably automatically closed when an electronic monitoring device is used matching with the utility model. The warning timer comprises a timing circuit, a gas leakage control measuring circuit, an and gate circuit, an initial delay circuit, a switching circuit, etc. and can reliably control the electromagnetic valve, the buzzer and the exhaust fan. The gas source can be automatically closed when the timing is over or the gas leaks; the exhaust fan can be automatically opened for cleaning the environment polluted by the gas leakage; the automatic alarm can be carried out.
Description
The monitoring of the utility model and combustion gas and control relevant, relevant with warning device, relevant with the revolution axis type solenoid valve.
Traditional gas monitoring control gear function singleness has only fuel gas alarm a kind of, by gas sensitive element, gas leakage testing circuit, and AND circuit, switching circuit, vibrator circuit, buzzer is formed.Just behind gas leakage, send alarm sound, notify people to remove to close gas, door window.But in life, it is not enough that alarm sound is only arranged sometimes, for example stops the supple of gas or steam temporarily, and owner forgets to close air valve and goes out, in case combustion gas is overflowed in a large number after coming gas, also nobody closes source of the gas even report to the police.Though chimes of doom is arranged sometimes, fail for various reasons to hear, can not in time handle, thereby can not guarantee to avoid material and human loss.Because combustion gas can not timing automatic close, generally dare not be during use from the people, otherwise easily pot is burnt out, food is burnt.Particularly, more inconvenient midway if be in a hurry in the time of to go out.
Traditional electromagnetic valve structure complexity, processing is difficult for, and cost is higher.Be not suitable for being used for closing automatically of daily life source of the gas.Also be unsuitable for and timing, the supporting use of warning device.
The purpose of this utility model provides a kind of simple in structure, and is easily manufactured, solenoid valve with low cost, can with the supporting use of electronic monitoring device, close source of the gas automatically.
Solenoid valve of the present utility model is by the revolution axis type air valve, and trigger mechanism of a crossbow structure and electromagnet are formed.The machine structure has curve bath, and arched arm is housed in the groove, and curve bath is connected by elastic element with arched arm one end, and the other end of arched arm is fixedlyed connected with air valve bull stick one end.The rotating shaft of the bull stick the other end and revolution axis type air valve is connected, and bull stick can have a bayonet socket by 90 ° of arched arm driven rotary on the arched arm, and a lever can rotate around a hinge, and the one end may be stuck on the arched arm bayonet socket, and this end is fixed with a magnetic part.The other end of lever and an elastic element link, and magnetic part is near an electromagnet, and magnetic part can make lever throw off from bayonet socket by electromagnet absorption.
Automatic self-closing gas alarm timer of the present utility model is by power circuit, gas sensitive element, gas leakage testing circuit, initial delay circuit, AND circuit, switching circuit, time circuit, vibrator circuit, dry reed relay, the automatic self-closing gas solenoid valve, ventilating fan and buzzer are formed.AND circuit is four or two inputs and door or three AND circuits and a diode, electronic switching circuit also is three, time circuit is by AND circuit 4, or diode, switching circuit 1 control automatic self-closing gas solenoid valve, the gas leakage testing circuit is by AND circuit 3, and switching circuit 2 is controlled ventilating fans, the gas leakage testing circuit is by AND circuit 2, and switching circuit 3 is controlled buzzers.The structure of automatic self-closing gas solenoid valve is as described above.
Power circuit of the present utility model is by transformer, electric bridge, and filter capacitor is formed.Gas sensitive element is worked under heating condition, and heater circuit is arranged.The gas leakage testing circuit is by time base circuit, and resistance and electric capacity are formed, and the initial delay circuit is by time base circuit, and resistance and electric capacity are formed, and show when having light emitting diode to be deferred to. Electronic switch 1,2 is made up of triode, resistance and dry reed relay, and electronic switch 3 is made up of triode and resistance.Time circuit is by time base circuit, resistance, and electric capacity is formed, and oscillator is by triode, and diode and resistance are formed.Commutation diode and contact switch are arranged between electromagnetic valve coil and the power supply.Arched arm one end of solenoid valve has a contact switch contact, and one group of connection bull stick is arranged, and one handle is arranged on the arched arm.
Initial delay circuit output low level during energising just, with door also output low level, electronic switch opens circuit, and does yellow relay and disconnects, and the solenoid valve no current passes through, and it is open-minded that combustion gas keeps.After several minutes, initial delay circuit output high level, the utility model is in detected state.The purpose that the initial delay circuit is set is that the gas sensitive element that prevents to switch on just is unstable and false alarm takes place.If the testing environment air is normal, gas leakage testing circuit output low level, above-mentioned state is constant.If leak gas, no matter be natural gas, coal gas, liquid gas, biogas, gas sensitive element change in resistance impel gas leakage testing circuit output high level, also export high level with door 1,2,3, electronic switch 1,2,3 is connected, the dry reed relay closure, and source of the gas is closed in solenoid valve energising adhesive.Ventilating fan is opened simultaneously, vibrator circuit work, and buzzer is reported to the police.When indoor air recovers normal, after the value, the variation of gas sensitive element resistance makes gas leakage detect output low level, with door 1,2,3 output low levels, electronic switch 1,2,3 opens circuit, and dry reed relay disconnects, ventilating fan, oscillator quits work, and the buzzer chimes of doom stops.The warning concentration of gas sensitive element is 0.3～1% optional, is equivalent to 1/16～1/5 of natural gas concentration of lower explosive limit approximately.
When using timer, timer switch is connected power supply, initial timer circuit output low level, with door 4 output low levels, electronic switch 1 opens circuit, and dry reed relay disconnects, the electromagnetic valve coil no current, air valve is open-minded.After the time, timer road output high level, electronic switch 1 path, the dry reed relay closure, the magnetic part on the solenoid valve energising adhesive lever is closed source of the gas.
The utility model is in when using gaseity, and elder generation changes 90 ° of radians with the arched arm up time needle plate of the trigger mechanism of a crossbow structure of solenoid valve.Shift fork drives bull stick, and rotating shaft is rotated 90 ° thereupon, and the lower end that makes air valve open lever is moved to the left the breach that snaps in arched arm under the effect of spring.The contact of arched arm is connected the contact switch that is connected in series with electromagnet coil simultaneously.
When gas leakage or timer after the time, have electric current to pass through as previously mentioned in the electromagnet coil.Magnetic part on the solenoid valve adhesive lever moves right the lever lower end, leaves the arched arm breach, and arched arm is done motion counterclockwise under spring action, and shift fork drives bull stick and rotates 90 ° of pass gas check valves.Simultaneously contact disconnects contact switch, makes to no longer include electric current in the electromagnet coil and pass through.This moment is for closing gaseity.
Electromagnetic valve structure of the present utility model is simple, and is easy to process, with low cost, with the supporting use of electronic monitoring device fix time to limit or can close source of the gas reliably automatically during gas leakage, on the family expenses gas-fired boiler, have been widely used.Use warning, the timer of this solenoid valve, when gas leakage is transfinited, not only can the alert notice people open door and window, and can open ventilating fan automatically and upgrade ambient air.The more important thing is and to close source of the gas immediately automatically.Timer can make people can be double in gas do other thing, even goes out and be without fear of an attack from the rear, and can save time, and saves the energy, guarantees to use gas safety.
Fig. 1 is for the utility model automatic self-closing gas is reported to the police, the timer skeleton diagram.
Fig. 2 is for automatic self-closing gas is reported to the police, timer circuit figure.
Fig. 3 is the 74LS08 integrated package.
Fig. 4 is the NE555 integrated package.
Fig. 5 is in opening state for automatic self-closing gas newspaper magnet valve structural drawing.
Fig. 6 is in closed condition figure for the automatic self-closing gas solenoid valve.
Following is embodiment of the present utility model:
Embodiment 1:
Automatic self-closing gas solenoid valve of the present utility model is by revolution axis type air valve 20, trigger mechanism of a crossbow structure 21, and electromagnet 12 constitutes, and crossbow machine mechanism has curve bath 3, is positioned at the arched arm 2 of curve bath 3, and spring 14 is arranged between curve bath and arched arm.Arched arm has bayonet socket 6, handle 1, and contact handle 10, its contact can make electromagnet coil circuit upper contact switch 11 connect.Have the shift fork 8 and the bull stick 7 of revolution axis type air valve to link, bull stick 7 is connected with rotating shaft 9.Have lever 4 to rotate around hinge 17, the one end can with the arched arm bayonet fittings.This end is fixed with iron plate 13, and the other end is connected with spring 5, and iron plate 13 can be by electromagnet 12 absorption.During use earlier with handle 1 plate to left, make arched arm 2 in curve bath 3, do clockwise arc motion, to lever 4 under the effect of little spring 5, the lower end is moved to the left and snaps in till the breach 6, at this moment lever 7 is driven by shift fork 8 and rotates, and rotating shaft 9 clockwise rotates 90 ° thereupon, makes air valve open-minded.Contact arm 10 is connected the contact switch 11 that is connected in series with electromagnet coil simultaneously.This moment is for using gaseity.When gas leakage or timer after the time, have electric current to flow through in the electromagnet coil, electromagnet 12 is in coil under the function of current, adhesive iron plate 13 moves right the lower end of lever 4, leaves breach 6, arched arm 2 is done counterclockwise arc motion under spring 14 effects, shift fork 8 drives axostylus axostyle 7 and closes gas check valve.Contact 11 disconnects simultaneously, no longer includes electric current in the electromagnet coil and passes through.This moment is for closing gaseity.
Embodiment 2:
Automatic self-closing gas of the present utility model is reported to the police, and timer is by power circuit, gas sensitive element, heater circuit, gas leakage testing circuit, initial delay circuit, AND circuit, time circuit, electronic switch 1,2,3, dry reed relay 1,2, oscillator, the automatic self-closing gas solenoid valve, ventilating fan, buzzer is formed.
Power circuit is by D1-4, and C1 forms.Gas sensitive element is Q, and Q works under heating condition, and heater circuit is by L3, D5, and C2, R1 forms.Leak gas testing circuit by IC2, R3, Rt, W1, R4, C7 forms.The setting of thermistor Rt is that gas sensitive element Q is carried out temperature correction.Gas sensitive element Q its resistance in normal air is about 200K Ω, is about 60K Ω in 1% concentration methane gas, and is linear at this scope internal resistance value and concentration.
The initial delay circuit is by IC1, C3, and R2, C5 forms, light emitting diode D8, R5 demonstration when being deferred to.AND circuit is the 74LS08 integrated package, for four group of two input end and door are arranged, 1,2,3,4,5,6,7,8,9,10,11,12,13,14 wiring pin is arranged.With door IC4-1, IC4-2, IC4-3, IC4-4 represent the 74LS08 integrated package.In the circuit of Fig. 2, IC4-4 in fact only plays the unilateral conduction effect, and an available fully general-purpose diode replaces.In the utility model, 74LS08 has four group of two input end and door, and 1,2,3 of AND circuits have been used three groups, so will remain one group input end and connect, makes the usefulness of unidirectional conducting with the replacement diode.
Warning circuit is made up of pierce circuit and buzzer 17.Vibrator circuit comprises BG2, BG3, R10, R11, R12, D7.
Time circuit is by IC3, C4, and R6, W2, C6 forms.K1 is the time circuit power switch.
The automatic self-closing gas solenoid valve is by electromagnet 12, revolution axis type air valve 15, and trigger mechanism of a crossbow structure 16 is formed.Concrete shape, structure as described in Example 1.K2 is the contact switch with electromagnet 12 coil tandems.Its contact is the contact 11 in the electromagnetic valve structure.
IC1, IC2, IC3 is the NE555 time base circuit, and 1,2,3,4,5,6,7,8 pin are arranged.BG1-5 can be with any NPN silicone tube, as long as β 〉=40.
During the utility model work, 2, the 6 pin current potentials of IC2 are Vi:
Vi＝ (RQ)/(（R3＋Rt）＋RQ) ·VD （1）
1. RQ is the gas sensitive element internal resistance in the formula, and VD is the power circuit output voltage.
During normal air, RQ is bigger, Vi＞2/3 VD, and the discharge transistor conducting of IC27 pin, the Vi current potential becomes:
Vi＝ (RQ∥（W1＋R4）)/(〔RQ∥（W1＋R4）〕＋（R3＋Rt）) ·VD （2）
At this moment owing to being Vi＞1/3 VD still, so the 3 pin output low levels of IC2.
During gas leakage, the resistance of RQ reduces with the increase of gas concentration in the air, when low when making Vi≤1/3 VD, the output switching activity of IC2 is a high level, at this moment discharge transistor ends, the value of Vi by 1. formula decision, still can satisfy Vi＜2/3 VD again, so IC2 keeps the output high level.If the gas concentration in the indoor air is reduced, then RQ can increase gradually, when air recovers normal value, the increase of RQ makes Vi 〉=2/3 VD, then the output switching activity of IC2 is a low level, discharge transistor conducting within 7 pin, and Vi is again by 2. formula decision.
Because it is a lot of that gas sensitive element descends in energising initial stage resistance, rises gradually then, just reaches stable after several minutes, for preventing the false alarm at the initial stage of switching on, the spy is provided with initial delay IC circuit 1.The equivalent resistance of C3 is very little during energising just, 2,6 pin current potential Vi＞2/3 VD, IC1 output low level.Along with C3 charges by R2, the Vi current potential reduces gradually, and when Vi≤1/3 VD, the IC1 output switching activity is a high level, and light emitting diode D8 is shinny, and after this IC1 keeps high level output always.
During no gas leakage, with door IC4-2 output low level, electronic switch BG1 ends, and the pressure drop of R8 two ends is very little, and oscillator is not worked.Same electronic switch BG4, BG5 also is in turnoff state.During gas leakage, with door output high level, BG1 conducting, the pressure drop of R8 two ends be near VD, the warning of starting working of vibration road.Same BG4, BG5 is conducting also, has suitable electric current to pass through in the dry reed relay coil, the closed solenoid valve of connecting of dry reed-pipe; Close source of the gas, and open ventilating fan.When air recovered normal value, the gas leakage testing circuit is output low level again, with door also output low level, and BG1, BG4, BG5 all ends, and ventilating fan, oscillator quit work.The working state of solenoid valve is as described in the embodiment 1.
The time circuit principle is identical with delay circuit, and K1 disconnects at ordinary times, and IC3 does not work, and just makes K1 connect power supply when will be with timer.
IC1, IC2, the operation point of IC3 is only relevant with the certain proportion of VD, and power supply need not to adopt special voltage stabilizing measure.
Claims (2)
1, automatic self-closing gas solenoid valve is characterized in that by the revolution axis type air valve, crossbow machine mechanism, and electromagnet is formed.Crossbow machine mechanism has curve bath, arched arm is housed in the curve bath, curve bath is connected by an elastic element with arched arm one end, and the other end of arched arm is fixedlyed connected with bull stick one end of revolution axis type air valve, and the bull stick the other end and air valve rotating shaft are connected, bull stick, rotating shaft can have a bayonet socket to engage with a lever one end by 90 ° of arched arm rotary driving on the arched arm, lever can rotate around fulcrum, but there is a magnetic part at the place, fastening end, and the other end is connected with an elastic element.Magnetic part is near an electromagnet, and the adsorbable magnetic part in electromagnet energising back makes lever card end leave the arched arm bayonet socket, and arched arm rotates under the effect of preload elastic element, drives air valve bull stick, rotating shaft half-twist.
2, the automatic self-closing gas solenoid valve of claim 1 proposition, it is characterized in that said elastic element is a spring, on the said arched arm one handle is arranged, arched arm one end has a shift fork to connect bull stick, other has a contact switch contact, electromagnet coil is serially connected with a contact switch, and contact makes contact switch connect when bayonet socket is blocked by lever, contact switch is opened circuit non-when blocking state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88212834 CN2052470U (en) | 1988-04-02 | 1988-04-02 | Solenoid valve for automatic cutting off gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88212834 CN2052470U (en) | 1988-04-02 | 1988-04-02 | Solenoid valve for automatic cutting off gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2052470U true CN2052470U (en) | 1990-02-07 |
Family
ID=4846092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88212834 Withdrawn CN2052470U (en) | 1988-04-02 | 1988-04-02 | Solenoid valve for automatic cutting off gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2052470U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033398A (en) * | 2012-12-19 | 2013-04-10 | 深圳市建筑科学研究院有限公司 | Timed passive air sampler |
| CN107714319A (en) * | 2017-11-01 | 2018-02-23 | 遵义市第五人民医院 | A kind of wheelchair for preventing paralysed patient drop foot |
| CN108938240A (en) * | 2018-06-07 | 2018-12-07 | 田青 | A kind of ward nursing bed of intelligent alarm |
| CN113433169A (en) * | 2021-06-23 | 2021-09-24 | 广州研测安全技术有限公司 | Combustible gas safety on-line transmission monitoring devices based on thing networking |
-
1988
- 1988-04-02 CN CN 88212834 patent/CN2052470U/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033398A (en) * | 2012-12-19 | 2013-04-10 | 深圳市建筑科学研究院有限公司 | Timed passive air sampler |
| CN107714319A (en) * | 2017-11-01 | 2018-02-23 | 遵义市第五人民医院 | A kind of wheelchair for preventing paralysed patient drop foot |
| CN108938240A (en) * | 2018-06-07 | 2018-12-07 | 田青 | A kind of ward nursing bed of intelligent alarm |
| CN113433169A (en) * | 2021-06-23 | 2021-09-24 | 广州研测安全技术有限公司 | Combustible gas safety on-line transmission monitoring devices based on thing networking |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |