CN2162598Y

CN2162598Y - Automatic close device for gas of household

Info

Publication number: CN2162598Y
Application number: CN 93219768
Authority: CN
Inventors: 陈岩
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-07-23
Filing date: 1993-07-23
Publication date: 1994-04-20
Anticipated expiration: 2003-07-23

Abstract

The utility model relates to an automatic close device for household gas, which is an electromagnetic valve device matched with an indoor gas alarm circuit. A permanent magnet is arranged near the gas inlet on the lower part of a valve cavity of the utility model, the upper part of the valve cavity is provided with a pair of iron cores and a valve stem, the outside of each iron core is wound with a wire packet, the valve stem can upward move and downward move, and the lower end of the valve stem is provided with a magnetic pressing piece. When gas leakage occurs, the alarm circuit sends out the sound alarm and gives instant voltage to the electromagnetic valve, the electromagnetic valve cavity connected with the pipeline in series is closed, the gas source is cut off. The state can be kept until the valve stem is manually pulled up and the electromagnetic valve is opened again.

Description

Automatic close device for gas of household

The utility model belongs to domestic gas pipeline valving, particularly a kind of domestic gas self closing device of connecting and being installed on the household gas utensils breather line and being used with the indoor fuel gas warning circuit.

Domestic gas (coal gas, liquefied gas) kitchen range generally all are to be that main valve and kitchen range dish control valve on air storage pipeline or the gas tank controlled enabling of gas by two valves, when on the kitchen range dish flame not being arranged or after gas pipeline damages because carelessness and other outside cause cause above-mentioned two valves to be opened simultaneously, combustion gas just can be leaked in a large number, lead to accidents such as fire, blast, even cause personal injury.In the prior art, the device that is used to prevent household gas leakage mainly is to have the exhaust apparatus that can report to the police to gas leakage (as exhaust fan of Electronic Nose class etc.), they monitor the use of gas kitchen ranges by the air-sensitive sensing circuit that connects with exhaust fan, one dust gas takes place to leak and above behind certain value, the air-sensitive sensing circuit is promptly started working and exhaust fan is opened.Though this class device can prevent calamity to a great extent and take place, can not cut off and leak gas circuit and the calamity source is stopped fully.

The purpose of this utility model is to overcome above the deficiencies in the prior art, and then provide a kind of domestic gas self closing device of simple in structure, dependable performance, this device can gas circuit occur closing automatically when gas leaks at gas kitchen ranges by being used with known indoor fuel gas warning circuit.

Do technical solution for achieving the above object, device provided by the utility model is a kind of electromagnetic valve device logical with indoor fuel gas warning circuit Electricity Federation, near the fuel gas inlet of the bottom of this magnetic valve valve pocket, put permanent magnet is arranged, be provided with one on the top of valve pocket and be tied with the iron core of lead bag and one outside secondary and can make up and down valve rod, a soft magnetism compressing tablet is arranged in the attaching of the lower end of valve rod.The gas alarm circuit is not worked at ordinary times, and compressing tablet is adsorbed on the iron core under the effect of bottom permanent magnet, and the magnetic valve valve pocket is open-minded; When the gas leakage situation occurring, the gas alarm circuit working, when sending audible alarm, give transient voltage of magnetic valve (continuing about 1 second), make iron core produce magnetic after being wrapped in the outer lead bag energising of iron core, absorption magnetic compressing tablet is thereon pushed, thereby seal the valve pocket air inlet, block the source of the gas that leaks.After treating that leakage failure is eliminated, by artificial pull-up activity valve rod, the magnetic compressing tablet is adsorbed on the iron core again, then the magnetic valve valve pocket is open-minded once more.

Below with reference to accompanying drawing content of the present utility model is further described.

Fig. 1 is the structural representation of a specific embodiment of the utility model.

As shown in the figure, this domestic gas self closing device has the valve seat 8 that a cross section that has center air inlet 11 and sidewall gas outlet 12 on it is hollow E type, this valve seat 8 and a concavity loam cake 7 and a concavity outer casing 3 are connected by screw 6, constitute two cavitys, following cavity wherein is that valve seat 8 is the valve pocket of device with the cavity that loam cake 7 constitutes.Periphery at valve seat center air inlet 11 is arranged with two permanent magnets 9 that magnetic pole is different, also can be symmetrically arranged with 3～4 block permanent magnets 9 in the periphery of air inlet 11; Or enclose an inner loop shape permanent magnet 9 in air inlet 11 peripheries; Be fixedly plugged with a secondary outer arc iron core 5 that is tied with lead bag 4 between loam cake 7 tegmental walls, the two end portions of arc iron core 5 is inserted in the valve pocket, its part of exposing loam cake 7 by involution in the cavity that loam cake 7 and outer casing 3 are crossed; Combustion gas air-sensitive warning circuit is inserted by lead 14 in line bag 4 two ends; Centre bore and part that movable valve rod 2 passes outer casing 3 and loam cake 7 from top to bottom simultaneously stretch in valve pocket, and the upper end of this valve rod is provided with handgrip 1, and the lower end is equiped with a magnetic compressing tablet 10.During concrete enforcement, make the upper surface magnetic of valve seat permanent magnet 9 opposite with the magnetic that arc iron core 5 two-end-points in energising back produce.Generally speaking, when valve rod 2 is pulled upwardly, the soft magnetism compressing tablet 10 of its lower end will be adsorbed on two lower extreme points of arc iron core 5, this is owing to be subjected to the magnetic force induction of valve seat permanent magnet 9, also have magnetic on the soft magnetism compressing tablet 10, the same magnet of shape is when this magnet 10 during very near iron core 5, according to the magnetic force philosophy, the magnetic force between object is inversely proportional to square (the f ∞ l/r of spacing between object ²), so the magnetic pull between 5 two end points of soft magnetism compressing tablet 10 and iron core is greater than the magnetic pull between compressing tablet 10 and the permanent magnet 9, the external force effect that non-warp is bigger, compressing tablet 10 can not inhaled mutually with permanent magnet 9.Number in the figure 13 is a rubber diaphragm.

During use, this self closing device is serially connected on the breather line of kitchen range.Under the normal condition, soft magnetism compressing tablet 10 is attracted on the iron core 5, and the gas circuit of whole device is unimpeded.When moment that causes line bag 4 by certain value because of gas leakage during direct current, under the magnetive attraction effect that in iron core 5, induces, soft magnetism compressing tablet 10 will leave iron core 5 together with valve rod 2 and be adsorbed on the valve seat permanent magnet 9, thereby valve pocket air inlet 11 is sealed fully, and air feed is interrupted.After line bag 4 outage, valve pocket will be in closed state always, until with manual mode with valve rod 2 pull-ups till, so also just guaranteed the safe handling of combustion gas.

Claims

1, a kind of domestic gas self closing device of connecting and being installed on the household gas utensils breather line and being used with the indoor fuel gas warning circuit, have a cross section that has center air inlet (11) and sidewall gas outlet (12) on it and be the valve seat (8) of hollow E type, this valve seat (8) constitutes a valve pocket with a concavity loam cake (7) by screw (6) attaching, it is characterized in that:

1.1 the periphery at valve seat center air inlet (11) is arranged with two permanent magnets (9) that magnetic pole is different;

1.2 be fixedly plugged with the arc iron core (5) that is tied with lead bag (4) outside the pair between loam cake (7) tegmental wall, the gas alarm circuit is inserted by lead (14) in line bag (4) two ends; Attaching has a concavity outer casing (3) on loam cake (7), and the part that the two cavity that crosses exposes loam cake (7) with arc iron core (5) is involution in addition;

1.3 have a movable valve rod (2), centre bore and part that this valve rod (2) passes outer casing (3) and loam cake (7) stretch in valve pocket, are provided with a soft magnetism compressing tablet (10) in the lower end of valve rod (2).

2,, it is characterized in that the upper surface magnetic of described valve seat permanent magnet (9) is opposite with the magnetic that energising back arc iron core (5) two-end-point produces as the domestic gas self closing device of claim 1 regulation.

3,, it is characterized in that being symmetrically arranged with 3～4 block permanent magnets (9) in the periphery of valve seat center air inlet (11) as claim 1,2 described domestic gas self closing devices.

4,, it is characterized in that being provided with a ring shape permanent magnet (9) in the periphery of valve seat center air inlet (11) as claim 1,2 described domestic gas self closing devices.