CN2050554U

CN2050554U - Protective device for putting -out fire

Info

Publication number: CN2050554U
Application number: CN 88211647
Authority: CN
Inventors: 陈喜文
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-04-13
Filing date: 1988-04-13
Publication date: 1990-01-03

Abstract

The utility model belongs to the technical field of gas-flow control technology, which mainly solves the problem of preventing the combustion-gas from continuously overflowing on the occasion of flameout of the combustion-gas. The temperature difference caused by combustion and flameout of the combustion-gas is utilized to make a heat-sensitive sensor generate a displacement which drives a thermal valve pin to move and automatically cut the gas path. The device can be installed on the combustion-gas path to enhance the safety in using pipeline gas, liquefied gas, etc.

Description

Protective device for putting -out fire

The utility model belongs to gas flow control technology field.

There is a problem usually in the kitchen range of using gases fuel, when being exactly the fuel gas buring on the kitchen range, might be by some unexpected extraneous factor such as wind, and the excessive grade of rice to be cooked is extinguished fire, and this situation is not often found by people, so be referred to as to put out steathily.After fire put out and puts out steathily, imflammable gas was excessive in the same old way, and the gas that overflows when reaching finite concentration, just may cause breaking out of fire indoor, blast, and serious accidents such as poisonings are even well-ventilated or in time obtain processing also can cause the waste of the energy and the pollution of air.

The purpose of this utility model is to solve to prevent after combustion gas is stopped working that combustion gas from continuing excessive problem.Utilize the fuel gas buring and the flame-out temperature difference that causes to make heat-sensitive sensor produce displacement, the displacement drive thermal control bibcock by heat-sensitive sensor moves again, cut off gas circuit automatically, thereby it is excessive to stop fuel gas.

Structure of the present utility model as shown in Figure 1.(1) housing; (2) fuel gas inlet; (3) thermal control valve port; (4) thermal control bibcock; (5) O-ring seal; (6) flexible sheet; (7) thermal walking passes bar; (8) bimetal leaf, (9) gas outlet; (10) moving valve port; (11) start bibcock; (12) self-marketing spring; (13) hand push button; (14) push rod; (15) spring.On housing, be provided with fuel gas inlet, gas outlet, hand push button, side one flexible sheet in the hand push button terminal, make the startup valve port in the flexible sheet inboard and the startup bibcock is housed, at startup valve port wall the self-marketing spring is arranged, side one flexible sheet in temperature-sensitive displacement transducer terminal, make the thermal control valve port in the flexible sheet inboard and the thermal control bibcock is housed, be connected the push rod on the thermal control bibcock, connect the thermal control bibcock and start bibcock and be contained in the push rod, expose outside the spring of a part at push rod, be contained in the startup bibcock respectively, O-ring seal between thermal control bibcock side and the inner walls, two gas circuits and the gas outlet of making the T font in the housing communicate.

Effect of the present utility model is as follows.This device fuel gas inlet, gas outlet turns on the combustion gas gas circuit.Because the effect of self-marketing spring starts bibcock and sealed the startup valve port, device is in stable state, and gas circuit is obstructed.During startup, press hand push button, then promote flexible sheet and move inward, the startup bibcock is moved inward, start valve port and fuel gas inlet and form path, combustion gas is gone out for burning usefulness, flame ignition through gas outlet.Let go this moment, because the effect of self-marketing spring starts bibcock and can oneself not reset, this moment, gas circuit was (2)-(10)-(9).When burning, bimetal leaf is heated, and curves inwardly, and promotes thermal walking and passes bar to intrinsic displacement, and flexible sheet is to intrinsic displacement, and the inside displacement of thermal control bibcock makes thermal control valve port and fuel gas inlet form path.In the time of this action, the elastic force by spring starting outside bibcock pushes to, is closed the startup valve port by push rod, and this moment, gas circuit became (2)-(3)-(9).After flame-out, the bimetal leaf temperature descends, and becomes straightly again, makes the displacement of thermal control bibcock close the thermal control valve port, cuts off gas circuit.And start bibcock this moment because the effect of self-marketing spring is kept motionlessly, still is in the position that sealing starts valve port.Whole device is returned to initial stable state, and the combustion gas gas circuit is in dissengaged positions.

Fig. 2 is a thermometer bulb thermal walking sensor.(16) thermal walking bellows, (17) thermal expansion thermometer bulb.Replace thermal walking to pass bar and bimetal leaf with this thermometer bulb thermal walking sensor, can play same effect.

Above-mentioned utility model can also be used with the electronic striking device.This electronic striking device such as Fig. 3, shown in Figure 4.Electronic striking is to realize by three special contactors.K switch ₁Started bibcock and dug system, K switch ₂Controlled by hand push button, K switch ₃Being subjected to thermal walking to pass bar controls.Fig. 3 is contactor K ₁, K ₂, K ₃Circuit diagram.Fig. 4 is these three switches and the schematic diagram that cooperates of valve body.Fig. 3, the A among Fig. 4, B, C, D, E, F represent six kinds of corresponding running statuses.Briefly explain as follows.

State A.Be in stable state, gas circuit is obstructed.K ₁Logical, K ₂Disconnected, K ₃Disconnected, ignition point a, b are obstructed, so do not strike sparks.

State B.By being in state B behind the hand push button, gas circuit is logical.This moment K ₁Logical, K ₂Logical, ignition point a, b are also logical, the ignition device sparking, and combustion gas is lighted.

State C.After letting go, be in state C, gas circuit is still logical.This moment K ₁Logical, K ₂Disconnected, ignition point a, b are obstructed, do not strike sparks.Combustion gas burns away.

State D.During fuel gas buring, the bimetal leaf expanded by heating, thermal walking passes bar to intrinsic displacement, K ₁Disconnected, K ₃Logical, ignition point a, b are still disconnected, do not strike sparks.

State E.Temperature continues height of continuing rising, K ₁Logical, K ₃Disconnected, ignition point a, b are still disconnected.To state E, it is logical that gas circuit keeps from state B, and combustion process continues.

State F.Flame-out (artificial or non-artificial) takes place, and then temperature-sensitive displacement sensing actuator temperature descends, K ₁Logical, K ₃By disconnected flexible, ignition point a then, b is logical, strikes sparks.If, gas circuit this moment also logical (non-artificial flame-out), then automatic ignition is lighted, and gets back to state E; If light, temperature-sensitive displacement sensing actuator temperature continues to descend, and further produces displacement, gets back to state A, and gas circuit is cut off automatically.If gas circuit is cut off for extinguishing because of the people, then as mentioned above, still can carry out one time automatic ignition, can play the safety inspection effect when stopping working.

The utility model has the advantages that easy to usely, reliable, easy to manufacture, can produce in batches.Safe coefficient when raising piped gas, liquefied gas etc. use.

Claims

1; a kind of by the temperature-sensitive displacement transducer; the flame-out protection device housing; the flame-out protection device that the thermal control valve constitutes; feature of the present utility model is to be provided with fuel gas inlet on housing; gas outlet; hand push button; side one flexible sheet in the hand push button terminal; make the startup valve port in the flexible sheet inboard and the startup bibcock is housed; on the startup port wall, the self-marketing spring is housed; side one flexible sheet in temperature-sensitive displacement transducer terminal is made the thermal control valve port and the thermal control bibcock is housed in the flexible sheet inboard, be connected the push rod on the thermal control bibcock; connect the thermal control bibcock and start bibcock and be contained in the push rod; expose outside a part of spring at push rod, be contained in the startup bibcock respectively; O-ring seal between thermal control bibcock side and the inner walls, two gas circuits and the gas outlet of making the T font in the housing communicate.

2,, it is characterized in that the temperature-sensitive displacement transducer of being adorned can be bimetal leaf temperature-sensitive displacement transducer or the thermometer bulb thermal walking sensor be made up of thermal walking bellows and thermal expansion thermometer bulb according to the described flame-out protection device of claim 1.

3,, it is characterized in that having a circuit-formed electronic striking device, K switch by three contactor controls according to claim 1 or 2 described flame-out protection devices ₁Started the control of bibcock, K switch ₂Be subjected to the control of hand push button, K switch ₃Be subjected to thermal walking to pass the control of bar.