CN2535619Y

CN2535619Y - Combustible gas safety electromagnetic valve

Info

Publication number: CN2535619Y
Application number: CN 02215984
Authority: CN
Inventors: 李志辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-02-28
Filing date: 2002-02-28
Publication date: 2003-02-12
Anticipated expiration: 2012-02-28

Abstract

The utility model provides a safety magnetic valve for combustible gas which belongs to the technical field of valves. The utility model solves the problems of automatic closing easily and complicated structures existed in the prior safety magnetic valves. The safety magnetic valve for combustible gas comprises a valve body and a casing body which is fixed on the valve body, wherein two ends of the valve body are provided with an air inlet and an air outlet, a sealing seat is arranged in the valve body, and a handle is arranged outside the casing body. The handle and the sealing seat are connected via a valve rod, a spring is sheathed on the valve rod, and further a steel core is arranged between the handle and the valve rod. A magnet coil is arranged in the casing body, and the magnet coil is connected with a leakage warning device via directing wires. The steel core penetrates the magnet coil, and the side portion of the steel core is provided with a permanent magnet. Through the magnetic effect of the permanent magnet, the steel core overcomes the pulling force of the spring without restoring positions, thereby the magnetic valve is under the state of opening. The magnet coil is sheathed on the valve rod directly in the safety magnetic valve, thereby the structure of the utility model is simplified, and the phenomenon of closing automatically will not happen.

Description

The inflammable gas security solenoid valve

Technical field

The utility model belongs to the valve that uses on a kind of inflammable gas pipeline, particularly a kind of behind gas leakage electromagnetic valve closed automatically.

Background technique

Use in piped gas or the rock gas process people, must prevent its leakage.Otherwise, just may cause the generation of gas poisoning even explosive accident.Common way is to adopt Fuel Gas Leak Alarm, sends alarm signal when coal gas or natural gas leaking, to remind the user.But, because leakage alarm can only send acoustooptic alarm, and can not make the action of timely cut-out source of the gas, exist deficiency.Therefore, method relatively more commonly used at present is to be connected in series a solenoid valve that links to each other with leakage alarm or stop valve on pipeline again, by leakage alarm control electromagnetic valve or stop valve action.Promptly when pipeline generation leakage phenomenon, alarm cuts out solenoid valve or stop valve by electrical signal, to avoid the generation of accident.

Existing security solenoid valve is to constitute on the basis of solenoid valve and manually operated valve, and it is formed by the mechanical structure that opens and closes valve with by the electromagnetic structure of solenoid controlled valve.Mechanical structure comprises valve body, sealing seat, valve rod, handle and is socketed in spring on the valve rod that the sidepiece of valve rod is provided with a screens fuse.The screens fuse is arranged in electromagnetic coil, and electromagnetic coil is connected with leakage alarm.When the pulling handle makes valve be in opening state, just utilize the screens fuse to make valve keep this state.In case the gas leakage phenomenon occurs, alarm will send electrical signal, makes the electromagnetic coil energising, and the screens fuse moves under the action of a magnetic field of electromagnetic coil, makes the screens fuse break away from valve rod.Like this, valve rod can reset under the effect of spring, makes valve closing.

Therefore, said method can ensure the safe way of gas pipeline.But, in existing security solenoid valve, because the screens fuse that is used for control valve is positioned at the sidepiece of valve rod, and be to block valve rod and make its location by being socketed in spring force on the screens fuse, so the screens fuse breaks away from valve rod easily in actual use, cause valve to close voluntarily, influence the normal use of combustion gas.Simultaneously, existing safety electromagnetic valve arrangement is also complicated, the product cost height.

Summary of the invention

The purpose of this utility model is in order to overcome the existing the problems referred to above of existing security solenoid valve, a kind of structure improved inflammable gas security solenoid valve to be provided, making it have characteristics simple and reasonable, easy to operate, reliable performance.

For achieving the above object, the utility model has adopted following technical proposal: this inflammable gas security solenoid valve comprises valve body, be fixed in the housing on the valve body, there are suction port and air outlet in the valve body two ends, be provided with sealing seat in the valve body, housing is provided with handle outward, connect by valve rod between handle and the sealing seat, a spring housing is connected on the valve rod, also be provided with an iron core between handle and the valve rod, electromagnetic coil is housed in the housing, electromagnetic coil connects with leakage alarm by lead, and iron core passes electromagnetic coil, and at the sidepiece of iron core the device of an energy to the iron core location is set.

Above-mentioned device to the iron core location generally is a permanent magnet that is positioned at the iron core sidepiece.After iron core moves up, by the magnetic force of permanent magnet, iron core together with overcoming the pulling force of spring, valve rod is not resetted, and also just make solenoid valve be in opening state.

Obviously, the operation of safety solenoid valve is very simple, and the carrying handle that only need make progress during use makes valve rod move up together with iron core.After decontroling handle, iron core can remain on this position under the effect of permanent magnet, and promptly solenoid valve is in opening state.If the gas leakage phenomenon, leakage alarm can produce electrical signal when sending acoustooptic alarm, make the electromagnetic coil energising.Like this, electromagnetic coil produces a magnetic field, and the magnetic field that this magnetic field and permanent magnet are produced offsets, and the magnetic force that permanent magnet is acted on the iron core is eliminated.Thereby iron core can move down under the spring tension effect, and valve rod and sealing seat reset, with closed electromagnetic valve.If under normal state, need to close this solenoid valve,, make iron core overcome the magnetic force of permanent magnet and reset to get final product as long as push a lower handle.

Compared with prior art, the security solenoid valve that the utility model provides directly is socketed on the valve rod electromagnetic coil owing to omitted the screens fuse, and utilize permanent magnet and locate, so its designs simplification, and phenomenon can not appear closing voluntarily.In addition, the unlatching or the closing operation of safety solenoid valve are all finished on same handle, with common two lever operated comparing of employing, it is simple to operation.

Description of drawings

Accompanying drawing is the cross-sectional view of the inflammable gas security solenoid valve that provides of the utility model.

Among the figure, 1, valve body; 2, sealing seat; 3, suction port; 4, air outlet; 5, handle; 6, iron core; 7, valve rod; 8, spring; 9, spring seat; 10, permanent magnet; 11, housing; 12, lead; 13, electromagnetic coil.

Embodiment

As shown in the figure, this inflammable gas security solenoid valve comprises valve body 1, sealing seat 2, handle 5, valve rod 7, spring 8 and housing 11 etc.There are suction port 3 and air outlet 4 in the two ends of valve body 1, by suction port 3 and air outlet 4, the safety solenoid valve are connected on the gas pipeline.

In the present embodiment, the lower end of valve rod 7 is a spring seat 9, and sealing seat 2 is enclosed within on the spring seat 9, is socketed in spring 8 on the valve rod 7 between spring seat 9 and iron core 6.Sealing seat 2 adopts rubber material to make usually.Have in the valve body 1 and sealing seat 2 corresponding sealing surfaces.Sealing seat 2 is exactly on the sealing surface of roof pressure in valve body 1 under the effect of spring 8, makes the safety closed electromagnetic valve.

In the present embodiment, the housing on the valve body 1 11 adopts plastics to make.Housing 11 is fixed on the valve body 1.Handle 5 passes housing 11, and its inner connects with iron core 6.And the other end of iron core 6 connects with valve rod 7.Be provided with electromagnetic coil 13 in the housing 11, iron core 6 passes the center of electromagnetic coil 13.In addition, in housing 11, also be provided with permanent magnet 10.Permanent magnet 10 is adjacent with electromagnetic coil 13.The magnetic force that permanent magnet 10 produces acts on the iron core 6, and iron core 6 is played the role of positioning.13 of electromagnetic coils pass through lead 12 and connect with leakage alarm.

The supporting use of safety solenoid valve and Fuel Gas Leak Alarm.During use, before leakage alarm is positioned over the source of the gas of pipeline.Under normal circumstances, pull-up handle 5 is because the positioning action of 10 pairs of iron cores 6 of permanent magnet makes the safety solenoid valve be in normally open.When gas leakage occurring, leakage alarm can be exported electrical signal when sending acoustooptic alarm, makes electromagnetic coil 13 energisings of security solenoid valve.The magnetic field that magnetic field that electromagnetic coil 13 produces and permanent magnet 10 are produced offsets, and makes permanent magnet 10 act on magnetic force elimination on the iron core 6.Like this, iron core 6 can move down with valve rod 7 and sealing seat 2 under the tension of spring 8, makes this closed electromagnetic valve.

Also can make the safety closed electromagnetic valve with manual mode.These needs are pushed a lower handle 5 downwards and are got final product.

Claims

1, a kind of inflammable gas security solenoid valve, comprise valve body (1), be fixed in the housing (11) on the valve body (1), there are suction port (3) and air outlet (4) in valve body (1) two ends, be provided with sealing seat (2) in the valve body (1), the outer handle (5) that is provided with of housing (11), connect by valve rod (7) between handle (5) and the sealing seat (2), a spring (8) is socketed on the valve rod (7), it is characterized in that also being provided with an iron core (6) between described handle (5) and the valve rod (7), electromagnetic coil (13) is housed in the housing (11), electromagnetic coil (13) connects with leakage alarm by lead (12), iron core (6) passes electromagnetic coil (13), and at the sidepiece of iron core (6) device of an energy to iron core (6) location is set.

2, inflammable gas security solenoid valve according to claim 1 is characterized in that described device to iron core (6) location is a permanent magnet (10) that is positioned at iron core (6) sidepiece.

3, inflammable gas security solenoid valve according to claim 1 and 2, the lower end that it is characterized in that described valve rod (7) is spring seat (9), sealing seat (2) is enclosed within on the spring seat (9), and the spring (8) that is socketed on the valve rod (7) is positioned between spring seat (9) and the iron core (6).