CN2125782U - Double-winding gas-range extinction protective device - Google Patents

Abstract

The utility model discloses a safety device for gas-range extinguishment, which can be installed on a gas-range to prevent the accident of gas evolution on the occasion of extinguishment, and, is provided with thermo-couples arranged on the burner and an electromagnetic valve arranged inside the cavity of a gas valve. Besides, an electric magnet is provided with two duplex windings which can respectively accept the current provided by the thermo-couples or a pulse igniter. The problems of inconvenient opening of the valve of the gas-range with an extinguishment protector, long time for automatically shutting off the valve on the occasion of accidental extinguishment, poor gas-tightness, non-adaptability of commercial process of the device, etc. With the cooking range provided with the utility model, the fire can be conveniently ignited just by a thumbing, and the valve can be automatically shut off in 30 seconds after the accidental extinguishment. The product can be commercially processed.

Description

Double-winding gas-range extinction protective device

The utility model relates to a kind of gas combustion range flameout safety device.It can supporting installation on gas-cooker, makes this kitchen range can cut off source of the gas automatically when accident is flame-out, prevents that combustion gas from escaping.

Existing thermoelectric (al) type gas combustion range flameout protector has comprised a magnetic valve of installing and one and has formed electric loop with this magnetic valve winding and be fixed on thermocouple on the burner in kitchen range air valve cavity.The thermoelectrical potential that produces on the thermocouple in the combustion process makes armature and electromagnetic actuation by winding, keeps opening wide of air valve; Thermoelectrical potential disappears when flame-out, and armature has been thrown off electromagnet under action of reset spring, and the source of the gas passage cuts off thereupon.Though it plays the safety effect that prevents that combustion gas from escaping to the accident extinguishing of gas-cooker, also brings following problem to gas-cooker: it is inconvenient that (1) opens the valve point fire.This is because thermocouple has certain heat lag time, that is to say that when people's pressing air valve switch, thermocouple does not also reach out the due thermoelectrical potential of valve, and general armature need lag behind more than 5～10 seconds with the adhesive of electromagnet.In the time of this section hysteresis, people must continue the pressing air valve switch and keep opening wide of gas circuit, otherwise the fire of just having lighted will be extinguished again.(2) designer is for reducing the trouble of opening the valve point fire, usually all adopt the way of the rigidity that reduces back-moving spring, its result just makes the pressing time that minimizing is arranged slightly, but also still need pressing switch And and weakening constantly along with this spring rate, accident extinguishing but increases to automatically cutting off the time that source of the gas experienced, and flame-out security descends, and closes the also variation of air-tightness behind the valve simultaneously.

Existing blowout protection device is except bringing to gas-cooker the above problem, and the processing of itself is also cumbersome, because the magnetic valve size is less, the coil winding on the electromagnet is unsuitable for industrial batch production.

The purpose of this utility model provides a kind of gas combustion range flameout protector simple in structure; make it have following characteristics: it is convenient that (1) makes the gas-cooker of being furnished with flame-out protection device open the valve point fire; realization kindles a fire once pressing promptly to put to switch, that is the action of electromagnetic actuation armature with open the valve point fire and finish simultaneously.(2) shortening gas-cooker accident extinguishing is to the air-tightness of cutting off automatically after valve is closed in required automatic valve-closing time of source of the gas and improvement.(3) this device is suitable for industrialized mass production, with the quality that improves device, reduce cost.

The utility model double winding gas combustion range flameout protector is a kind of improvement to existing thermoelectric (al) type blowout protection device, improved main aspect is: (1) on the electromagnet except have a work winding that connects together with the thermocouple output line, also increased by one be connected with pulse igniter can make igniting the time output delayed current enter starting winding in it; (2) increased on the electromagnet a pair of for coil with mechanical means coiling and the skeleton that can on electromagnet, install easily.

The double winding gas combustion range flameout protector has comprised the lead of a magnetic valve, an arteries and veins igniter, a thermocouple and some connection usefulness.

Magnetic valve is installed in the cavity Nei ， And of kitchen range air valve and its armature and air valve valve pad and is fixed together.Have two windings on the electromagnet, promptly work winding and starting winding, they are to be wound on a pair of skeleton surface that can be installed to easily on the electromagnet.

Between the starting winding on the microswitch of pulse igniter and air valve switch interlock ， And and it and the electromagnet lead of connection is arranged, the delayed current of exporting during for pulse firing enters in the starting winding.Thermocouple is fixed on the burner, and its output line connects with the work winding of electromagnet.

In the moment of opening the valve point fire, the delayed current on the pulse igniter enters the starting winding, makes the magnetic valve can adhesive in the heat lag time of thermocouple, has kept the spacious logical of gas circuit; Meanwhile, along with the raising of burner temperature, the ， And that rises gradually of the thermoelectrical potential on the thermocouple reaches out the valve electromotive force, and it promptly provides electric current to the work winding before the starting time finishes, and it is spacious logical to keep gas circuit.

To and contrast accompanying drawing by embodiment below the double winding gas combustion range flameout protector will be done further narration.Accompanying drawing thes contents are as follows:

Fig. 1 is the structure expanded view of double winding gas combustion range flameout protector;

Fig. 2 is the doublewound structure enlarged drawing of magnetic valve among Fig. 1.

From Fig. 1, can see that magnetic valve 2 its armature 22 of the cavity that is positioned at air valve 1 link together with air valve pad 12, if pressing air valve switch 14 or electromagnet 24 adhesive armatures 22 all can make valve pad 12 throw off from valve seat 13, at this moment the import 11 of valve is communicated with outlet 15, and combustion gas enters burner 5.The glide path of combustion gas is expressed in double dot dash line among Fig. 1.Double winding 21 is arranged on the electromagnet 24, can be clear that in conjunction with Fig. 2 the coil on top is a work winding 213, its lead-in wire connects with thermocouple 4 output lines 41 that are fixed on the burner 5; The coil of bottom is a starting winding 211, and its lead-in wire connects with the delayed current output lead 32 of pulse igniter 3.The microswitch 31 and the air valve switch 14 of pulse igniter is installed together and both can move simultaneously.

Double-winding structure on the electromagnet sees from Fig. 2, coil winding a pair of be on the skeleton 212 of material with nylon, the profile of skeleton endoporus and two of electromagnet is identical and its appearance can be rounded, so that make things convenient for coiling and coiling to finish the back cover on electromagnet.

Open the valve point fire as long as use hand pressing switch 14 once, microswitch 31 moves thereupon, and at this moment valve pad is thrown off valve seat, combustion gas enters burner and pulse firing burning; Meanwhile, the delayed current of igniter 3 through lead 32 enter the starting winding 211, electromagnetic actuation armature.Magnetic valve can replace the pressing action of staff, has kept opening wide of air valve.Then, again because of thermocouple has reached out the valve electromotive force before the starting time finishes, it can provide electric current to work winding 213, so magnetic valve continues the maintenance adhesive, gas circuit is spacious logical.If accident extinguishing, burner temperature descend, the interior current vanishes of work winding, armature is thrown off electromagnet 24 under the effect of back-moving spring 23 get back on the valve seat valve pad, prevents escaping of combustion gas thereby cut off gas circuit.

Double-winding gas-range extinction has following advantage: the time that (1) gas-cooker is driven valve is reduced to 0 second by the hand-held continuous pressing switch of original usefulness more than 5～10 seconds, and just namely unclamp hand and can kindle a fire once pressing switch, so easy to use. Therefore (2) rigidity of back-moving spring can be brought up to 35g/mm by present 25g/mm, and unexpected flame-out valve-closing time to automatically cutting off source of the gas is by being down to below 30 seconds more than 50 seconds, and the air-tightness of closing behind the valve strengthens. (3) structure of whole device is suitable for industrialized batch production, so the reliable cost of quality is low.

Claims (2)

1; a kind of double winding gas combustion range flameout protector; include the magnetic valve 2 that its armature 22 installed and air valve valve pad 12 are fixed together in air valve 1 cavity; the pulse igniter 3 of its microswitch 31 and air valve switch 14 interlocks; installing on the cooker burner 5 and its output line is connected thermocouple 4 on the work winding 213 of electromagnet 24 for one; feature of the present utility model is: have double winding 21 on the electromagnet 24; it also has starting winding 211 winding except work, and have between this winding and the pulse igniter 3 the delayed current input starting winding of output in the time of making igniting interior be connected lead 32.

2, double winding gas combustion range flameout protector as claimed in claim 1, the coil that it is characterized in that said magnetic valve double winding 21 are can be on the skeleton 212 that electromagnet 24 is installed on left and right two easily around two.