CN2381908Y - Safety valve for gas burner - Google Patents

Abstract

The utility model relates to a safety valve for gas stoves and natural gas stoves, and the utility model can be automatically closed when a gas source is stopped and fire is extinguished accidentally. The utility model is composed of a photoresistor, an electric box, and a valve. The valve is that the opening end of a cup-shaped casing body with an air inlet hole and an air outlet hole is orderly provided with a partition plate, a rubber film, and a cup-shaped end cover to form a cylinder shape, an A inner cavity, a B inner cavity, and a C inner cavity. The A cavity is provided with an electric magnet which is composed of an iron core, a gag bit, a spring, and a winding. The C cavity is provided with a spring plate and a valve core for controlling the closing and the opening of the valve. The utility model is safe and reliable compared with the existing methods of adding stench in gas and natural gas, etc.

Description

Coal gas, natural gas range safety valve

The utility model metal conduit valve field relates to coal gas, the natural gas range safety valve of a kind ofly stopping the supple of gas or steam at source of the gas, can valve-closing during unexpected fire extinguishing.

Because developing rapidly of coal gas, natural gas cause.At present, use the user of coal gas, natural gas range to popularize each large town of the whole nation and even rural area.Because air feed unit essentially need overhaul, safeguard facilities such as pipelines, even carry out the timing air feed, also the supply gas pressure deficiency can take place sometimes, make the situation that user's coal gas, natural gas range can not normal combustion.This just may produce coal gas, natural gas range that the user the using fire extinguishing situation of dying suddenly.At this moment, the user often is busy with other affairs, forgets timely shutoff cooking stove.After this, coal gas or natural gas are come quietly again, leak outside in a large number.Because coal gas, natural gas all belong to inflammable toxic gas, so just cause the heavy losses of lives and properties most probably to the user.Domestic this type of accident is of common occurrence, happens occasionally.

In addition, also can cause the generation of above accident owing to situations such as coal gas, the damage of natural gas range, tempering, joint come off.

The user is overflowed through regular meeting when many water food such as boiling water, cook congee, and excessive thing tends to coal gas, natural gas range are put out by water.At this moment, fail in time to find, also can cause a large amount of coal gas, natural gas to leak outside, cause the person and property loss as if the user.

For this problem, the more solution of domestic employing is that air feed unit adds a kind of foul smell in coal gas, natural gas, notes to cause the user.Yet this way is the investment cost height not only, and effect is also not ideal enough.

The home pipeline combustion gas voltage stabilizing self-closing valve that Chinese patent 95245077.7 provides can not solve the caused problem of accident extinguishing, Chinese patent CM87206630,88210914.6,89211208 provides a kind of safeties that utilize the thermal source of kitchen range own for kinetic energy, in this class invention, problem of ubiquity is: because heat-sensing device is directly in nearby baking of burning things which may cause a fire disaster, after flame-out, influenced by waste heat and valve is closed at short notice, thereby do not have practical value.

The purpose of this utility model according to the existing in prior technology problem design a kind of desirable, can source of the gas stop the supple of gas or steam or supply gas pressure low excessively, when coal gas, natural gas range can not normal combustion, cooking stove damage, tempering and tube connector come off when causing a large amount of gases to leak outside, and overflow to close coal gas, the natural gas range safety valve of source of the gas when thing is put stove fire out by water or accident is put out a fire rapidly reliably.

For achieving the above object and the design coal gas, the natural gas range safety valve is by photo resistance, electrical box and valve body are formed, valve body is to have into, the openend of the cup-shaped housing of venthole is equipped with dividing plate successively, rubber membrane and cup-shaped end cap, form cylindricality profile and A, B, three inner chambers of C, in the A chamber, be equipped with by iron core, armature, coil, the electromagnet that spring and dividing plate are formed, at B, a shape spool is housed in the C chamber, the one end is a cone, be inserted on the venthole of dividing plate, the other end stretches to outside the end cap, the formation shape of handling knob, and can inside and outsidely slide, equally distributed two above latch plates are housed in the C chamber, and its two ends withstand on respectively on the trough of spool and end cap, form two hinge knots of living, the cone of spool is withstood on the venthole of dividing plate, and guarantee sealing.When supply gas pressure just often, draw spool outward, valve opening, spring bending degree strengthen, the axial force that acts on the spool reduces, the gas that is entered the B chamber by air admission hole is enough to spool is remained on the valve opening position by the power that rubber membrane acts on the spool.Gas in the B chamber through venthole to the normal air feed of gas-cooker.When source of the gas is stopped the supple of gas or steam or air pressure is crossed when low, gas by rubber membrane the power on the spool of acting on reduce, spool moves in rapidly under the elastic force effect of latch plate, source of the gas is closed, when coal gas, natural gas range damage, tempering or when connecting hose-off, gas leaks outside rapidly, because air admission hole is less than venthole, thereby the pressure in the annular seal space B descends rapidly, spool moves in rapidly under the thrust of spring, and valve is closed automatically.When excessive thing is put coal gas, natural gas range out by water, or make coal gas, natural gas range under non-artificial situation of closing during accident extinguishing because of other reason, be contained in the kitchen range lucifuge photo resistance at the place signal of will put out a fire that warms oneself in front of a fire and import electrical box, electronic circuit in the electrical box is to coil power supply, the armature adhesive, and coal gas, natural gas no longer enter the B chamber, and the gas in the B chamber is discharged from venthole rapidly, air pressure in the B chamber descends, and spool moves in rapidly under the spring thrust effect, and valve is closed automatically.

The utility model is described in further detail below with reference to accompanying drawing.

Accompanying drawing is the cross-sectional view of a specific embodiment of the utility model.

As shown in the figure, have into, the cup-shaped housing 2 of venthole is for being connected on the cup-shaped object on the gas pipeline, at its openend dividing plate 3 is housed successively, rubber membrane 5 and cup-shaped end cap 6, form column profile and A, B, three inner chambers of C, spring 10 is housed in the hole of dividing plate 3, and the one side is equipped with iron core 8 by screw 9, the iron core 8 outer coils 13 that are equipped with the enamel-covered wire coiled, the armature 4 that can freely swing is housed on the iron core 8, dividing plate 3, armature 4, iron core 8 all makes with permeability magnetic material, thereby forms an electromagnet, at B, a shape spool 1 is housed in the C chamber, the one end withstands on the venthole of dividing plate 3, the other end stretches to the outside of end cap 6 and forms the shape of handling knob, and with its outer drawing, valve can be opened, plural latch plate 7 is equably distributing in the C chamber, its two ends are inserted in respectively in the trough of spool 1 and end cap 6, form two hinge knots of living, to guarantee the just often outer spool 1 that draws of air pressure, the back valve core of loosing one's grip no longer returns, make valve opening, stop the supple of gas or steam or air pressure can return when not enough automatically, make valve closing.

Claims (2)

1, a kind of coal gas, the natural gas range safety valve, by photo resistance 11, electrical box 12 and valve body are formed, valve body is to have into, the openend of the cup-shaped housing of venthole is equipped with dividing plate 3 successively, rubber membrane 5 and cup-shaped end cap 6, formation garden cylindricality profile and A, B, three inner chambers of C, it is characterized in that being equipped with in the A chamber iron core 8, armature 4, coil 13, the electromagnet that spring 10 and dividing plate 3 are formed, at B, the spool 1 of a shape is housed in the C chamber, the one end is that cone is inserted on the venthole of dividing plate 3, the other end stretches to the outside of end cap 6, the formation shape of handling knob, and can inside and outsidely slide, equally distributed plural latch plate 7 is housed in the C chamber, its two ends withstand on respectively on the trough of spool and end cap 6, form two hinge knots of living, make the venthole of the cone top of spool, and guarantee sealing to dividing plate 3.

2, coal gas as claimed in claim 1, natural gas range safety valve is characterized in that air admission hole Φ ₁Less than venthole Φ ₂