JPH0443724Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention is designed to ignite and extinguish the fire by pressing the ignition and extinguishing buttons, and to make the main valve act as a self-holding solenoid valve consisting of an electromagnet. This invention relates to a push-button gas valve for automatic ignition.

[Prior Art] Conventionally, gas valves in which gas is opened and closed by operating pushbuttons for ignition and extinguishing have been developed by the applicant et al. Proposed.

[Problems to be Solved by the Invention] In the conventional type, the combustion position of the ignition button is maintained mechanically, and even if the misfire safety valve opens, the ignition button remains in the combustion position. Furthermore, since the safety valve is attracted and held by a weak thermoelectromotive force using a thermocouple, there is a problem that the operation is not accurate and reliability is lacking.

The present invention was developed in view of the problems of the conventional technology, and its purpose is to make the main valve itself function as a self-holding solenoid valve, and to link it to the ignition button. An object of the present invention is to provide a push-button type gas valve for automatic ignition, which allows the ignition button to be returned to its return position in the event of a misfire.

[Means for solving the problem] In order to solve the above technical problem, the present invention has the following features:
Two push buttons 5 and 6 for ignition and extinguishing are set in a case body 4 having a gas inlet 1, a main gas outlet 2, and a pilot gas outlet 3, and the spring 7 is activated by pushing the ignition button 5. A slidable plunger 9 that faces a yoke 8 that is pushed against the bias, and a slidable main valve 11 that faces a fire extinguishing button 6 and has a valve spring 10 biased in the valve opening direction. The plunger 9 and the main valve 11 are interlocked by a double-throw lever 12 so that when one of them is pushed in, the other is pulled up, and the plunger 9 is normally attracted and held by the yoke 8 by magnetic force. around the plunger 9 so that when an abnormal current is applied to the coil 13 of the yoke 8 in the event of a misfire, the magnetic flux is applied to cancel the polarity of the magnet and the plunger 9 is released from being held by attraction. A magnet 14 is provided at a position facing the yoke 8.

Also, the ignition button 5 and the interlocking lever 1 are provided.
2 is preferably engaged so as to maintain the combustion position when pushed in.

[Example] A preferred embodiment of the invention is shown below.

The ignition button 5 and the extinguishing button 6 are provided on the panel board 20 adjacent to each other.

The lever 12 is supported by a support stand 19 so as to be able to swing from side to side with the intermediate portion as a fulcrum, and its both ends are connected to one end of the rod 9a of the plunger 9 and the other end to the end of the valve stem 11a of the main valve 11. ing.

The main valve 11 has a cam body 2 between it and the valve stem 11a.
1 is provided, and when the main valve is pulled up, the pilot valve 23 is pushed by this cam body 21, and the valve spring 2
The valve opens against the bias of step 2, and opens when the valve is pushed open. The linking means 15 is formed by engaging an engaging piece 12a integrally formed in a part of the lever 12 with an elongated hole 5a formed in a part of the ignition button 5 so as to be able to slide in the lateral direction.

The yoke 8 supplies current (pulse current) to the coil 13.
When passed through, it acts to cancel the polarity of the magnetic pole of the magnet 14.

The magnet 14 is made of a normal permanent magnet with fixed north and south poles, and in a normal state where no current is passed through the coil 13, the plunger 9, yoke 8, cover (no reference numeral), and magnet 14 form a magnetic circuit. The magnetic force of the magnet 14 exerts an attractive force between the yoke 8 and the plunger 9. This magnetic force acts as a self-holding force necessary to maintain the plunger 9 in its pushed-in position when it is forcibly pushed in by the ignition button 5. Therefore, when a pulse current is applied to the coil 13 in the event of a misfire, the polarity of the magnet 14 is canceled and the attractive force between the yoke 8 and the plunger 9 disappears, so the force of the yoke 8 to hold the plunger due to the magnetic force of the magnet 14 is instantly reduced. Disappear.

[Operation] When the ignition button 5 is pushed all the way, the plunger 9 is forced to move against the yoke 8 against the bias of the spring 7.
The position is self-held by the magnetic force of the magnet 14. At the same time, the main valve 11, which is interlocked with the lever 12, is pulled upward against the bias of the valve spring 10 by pulling up the valve stem 11a.

This opens the main valve 11, pilot valve 23, and bypass valve (not shown), and the main gas outlet 2
Then, gas flows out from the pilot gas outlet 3, and at the same time, an ignition switch (not shown) is activated to ignite the gas.

When you release your hand from the ignition button 5, the plunger 9
is attracted to and pressed against the yoke 8 by the magnetic force of the magnet 14 and maintains its position by itself, but the main valve 11 is designed to stop when it reaches halfway due to the bias of the valve spring 10. The pilot valve 23 and the bypass valve are closed, and the main valve 1 is closed.
1 holds the valve open.

Since the ignition button 5 and the lever 12 are interlocked by the interlocking means 15, the ignition button 5 maintains the pushed-in position and therefore the combustion state even if the plunger 9 does not return.

When the linear lever 16 is operated in this state, the needle rod 18 moves forward and backward via the U-shaped connecting pin 17, so the amount of gas flowing into the main gas outlet 1 can be varied widely and narrowly, and the firepower can be adjusted from large flames to low flames. adjusted to.

When the extinguishing button 6 is pressed, the valve stem 11a is directly pushed, so the main valve 11 is moved in the opening direction, and the plunger 9 is forcibly pulled up by the lever 12, so it is forced to escape from the suction area of the magnet 14. . Therefore, the main valve 11 closes immediately and everything stops in its original state.

In the above-mentioned combustion state, if the gas flame is extinguished by wind or boiling over, or in the case of a so-called abnormal misfire, a misfire sensor (not shown) operates at the same time as the misfire, and a pulse current is applied to the coil 13 of the yoke 8. Ru. The magnet 14, which is a permanent magnet, has fixed north and south poles, so when a pulse current is passed through the coil 13, magnetic flux is applied so as to cancel the polarity of the magnet. Therefore, the attraction force due to the magnetic force of the magnet 14 acting on the yoke 8 disappears, so that the plunger 9, and therefore the main valve 11, are released from self-holding. Therefore, the plunger 9 immediately returns to its original position, and the main valve 11 is also closed via the lever 12. At the same time, the ignition button 5 returns from the retracted position to the extinguished position, which is the extended position.

[Effect] The present invention consists of the above configuration,
In the combustion state, the main valve is self-held by the magnetic force of a permanent magnet, so the valve is held open by the strong magnetic attraction, and when a fire occurs, the polarity of the magnet is canceled and the valve closes immediately, improving safety. Very expensive. In addition, it is self-retained by the magnetic flux of the permanent magnet, and current flows through the coil only in the event of a misfire, resulting in low power consumption and excellent economic efficiency. In particular, this invention
When used as a control valve using a battery, the battery consumption time becomes long, and the battery consumption becomes significantly longer than that of a main valve that requires constant energization.

In addition, when the main valve is open and the combustion state is maintained, the ignition button is in the retracted state, and the ignition button can be automatically returned from the combustion position to the extinguishing position at the same time as a misfire. This is advantageous in terms of ensuring safety.

[Brief explanation of drawings]

Fig. 1 is a front view of the push button type gas valve for automatic ignition of the present invention, Fig. 2 is an enlarged sectional view taken along line A-A in Fig. 1, Fig. 3 is a side view of the same, and Fig. 4 is Fig. 3 B-- B
FIG. 3 is an enlarged cross-sectional view of the line. 1... Gas inlet, 2... Main gas outlet, 3... Pilot gas outlet, 4... Case body, 5... Ignition button, 6... Fire extinguishing button, 7... Spring,
8...Electromagnet (yoke), 9...Plunger,
10... Valve spring, 11... Main valve, 12... Lever, 13... Coil, 14... Magnet, 1
5...Connection means.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A case body 4 having a gas inlet 1, a main gas outlet 2, and a pilot gas outlet 3 has two push buttons 5 for ignition and extinguishment, which are set to be freely pushable.
6, a slidable plunger 9 facing a yoke 8 which is pushed against the bias of a spring 7 when the ignition button 5 is pressed, and a valve spring 10 facing the fire extinguishing button 6 in the valve closing direction. It consists of an energized slidable main valve 11, and when one of the plunger 9 and the main valve 11 is pushed in, the other is pulled up by a lever 12 that operates in a double-throw manner. The magnetic flux is configured so that the plunger 9 is attracted and held by the yoke 8, but in the event of a misfire, the coil 1 of the yoke 8
A magnet 14 is provided around the plunger 9 and at a position facing the yoke 8 so that when an abnormal current is applied to the magnet 3, a magnetic flux is applied to cancel the polarity of the magnet and the attraction and holding of the plunger 9 is released. Push-button gas valve for automatic ignition. (2) The automatic ignition push-button gas valve according to claim 1, wherein the ignition button 5 and the interlocking lever 12 are engaged to maintain the combustion position when pressed.