JPH01263417A - Gas safety device - Google Patents

Abstract

PURPOSE:To enable a safe use of a device to be carried out even in case of occurrence of an abnormal condition of going-out of gas by a method wherein a plurality of sub-control circuits for use in energizing an operating current to an electromagnetic operating element when a valve supporting device is manually operated and a main control circuit for energizing an operating current to the solenoid valve when the operating current is outputted from one of these sub-control circuits are provided. CONSTITUTION:When a pilot flame of a gas equipment 1a is diminished, each of outputs of a first OR circuit 37 and a first AND circuit 36 becomes L, a transistor 40 of a sub-controlling circuit 31a is turned OFF, an energization of an electromagnetic operating member 26 of the valve supporting device 4 is turned off, a valve seat 14 is moved back again, a valve opening 15 is closed and a supplying of gas in respect to the gas equipment 1a is shut off. At this time, when at least one of gas equipments 15 and 1c is used, a signal is outputted from the first AND circuit 36 of the corresponding sub-controlling circuits 31b and 31c and this is inputted to the second OR circuit 41 of the main controlling circuit 32, so that the transistor 44 of the circuit 32 keeps its ON state, the electromagnetic valve 9 is not closed, but it continues to supply gas.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present application relates to a gas safety device that can be used safely even when an abnormal condition such as a gas outage occurs during use of gas.

Conventional technology Conventionally, by opening a gas cock, a starting signal is output, a solenoid valve connected to the base of the gas supply circuit is opened, and gas is supplied to the gas appliance, causing gas combustion in the gas appliance. When the flame sensor detects the combustion state, the electromagnetic valve is kept open based on the detection signal, and when an abnormal state occurs in this state, for example, when the gas goes out, the electromagnetic valve is energized. A gas safety device configured to solve the problem and cut off the gas supply is known, for example, in Japanese Patent Publication No. 60-27901.

Problem to be Solved by the Invention However, according to the above-mentioned conventional configuration, when a plurality of gas appliances are in use and an abnormality occurs in one of them, for example, the solenoid valve located at the base This had the inconvenience of closing and cutting off the gas supply to other gas appliances that were in normal condition.

Therefore, the present application aims to solve the above-mentioned disadvantages.

Means for Solving the Problems In order to achieve the above-mentioned object, the present application provides an electromagnetic device that is connected to the source of the gas supply circuit, shuts off the gas supply under normal conditions, and opens the valve when energized to allow the gas supply. The valve is connected in parallel to the downstream position, and is normally closed to block gas flow, and when manually operated against biasing force, opens to allow gas flow. A plurality of gas appliances that burn gas, each equipped with a supporting valve device having an electromagnetic actuating body that operates and holds the gas, and a flame sensor that detects flame and outputs a flame signal, and a person corresponding to each gas appliance. and at least one of the plurality of sub-control circuits, which is provided, and energizes the electromagnetic actuating body with an operating current for a predetermined period of time or by the flame signal when the valve supporting device is operated with the hand. and a main control circuit that supplies the operating current to the solenoid valve when the operating current is output from the two circuits. The gas appliance includes a pilot ignition device that receives gas supply and ignites a pilot flame, and the gas appliance further includes a cock that adjusts the amount of gas supplied for combustion of the gas, and further includes a cock that adjusts the amount of gas supplied for combustion of the gas, and further includes a cock that adjusts the amount of gas supplied for combustion. When the flame signal disappears, an alarm circuit is activated by the disappearance signal, and when the gas pressure decreases or an earthquake occurs, the condition is detected and the alarm circuit is activated. In addition to outputting an operating abnormality signal, the main control circuit is equipped with an abnormal state detection circuit that denies the application of operating current to the solenoid valve.Furthermore, the abnormal state detection circuit detects the operating state from the normal state. The alarm circuit includes an alarm lamp circuit that blinks in response to the input of a disappearing signal, and an alarm buzzer circuit that operates a buzzer for a predetermined period of time.

Function: When the valve supporting device is opened manually against the biasing force in order to use the gas appliance, an operating current is applied to the electromagnetic actuator from the sub-control circuit for a predetermined period of time, for example, about 3 seconds.
The open state of the valve is maintained, and the operating current is also applied to the electromagnetic valve to open the electromagnetic valve, and gas is supplied from its source to the gas supply circuit. Then, the amount of gas supplied to the gas stove of the gas appliance is adjusted by opening the cock, and combustion is performed by igniting the gas using, for example, an ignition device. If the gas is not ignited within the 3 seconds mentioned in 1, the operating current of the solenoid valve will be cut off and the valve will close, and by releasing the manual operation, the valve supporting device will also return to the closed state. The gas flow is then cut off.

In addition, in item 1, when the gas is ignited and combustion starts, the flame sensor generates a flame signal, and the open state of the valve supporting device and the solenoid valve is determined via the sub-control circuit and the main control circuit. Retained.

In this gas combustion state, when the gas goes out, the flame signal disappears, so the operating current to the valve supporting device and the electromagnetic valve is cut off, and both of them close, and the gas supply ends.

Further, in the above, when two or more gas appliances are used at the same time and one of them goes out, the valve supporting device of the gas appliance closes due to the disappearance of the flame signal. At this time, the solenoid valve will not close because the operating current is output from the sub-control circuit that corresponds to the other gas appliances that are in a normal state.

In other words, only the valve supporting device installed in the gas appliance that has stopped going out is closed.

- In Paragraph J2, if the gas appliance is further equipped with a pilot ignition device that ignites a pilot flame upon receiving gas supplied from the valve-holding device, the gas from the valve-holding device is first ignited before the cock is opened. The pilot flame is ignited, and in this state the flame sensor generates a flame signal.

In the above, when the flame signal disappears due to extinguishing,
The alarm circuit is activated, the lamp of the alarm lamp circuit flashes, and the buzzer of the alarm buzzer circuit is activated for a predetermined period of time.

This alarm circuit is also activated by an abnormal signal generated from the abnormal state detection circuit when the gas pressure decreases while the gas is being supplied, or when an earthquake occurs. returns to normal state.

Embodiments Hereinafter, embodiments of the present application will be described in detail based on the drawings. 1st
The figure shows a state in which multiple gas appliances are connected to the gas supply circuit, each of which includes gas appliances (1)a and (1)b.

(1) Each includes a gas stove (2), a cock (3) that adjusts the amount of gas, a supporting valve device (4), and a flame setter (
5), and gas appliances (1)a and (1).
A pilot igniter (6) is installed in b, and a gas appliance (1) c
is equipped with an ignition device (7). In the figure, P indicates the flame from gas:+o(3).

The valve device (4) installed in each of the gas appliances (1)a, (1)b, and (1)c is connected to a gas supply source (8), for example, to a gas cylinder in the case of propane gas, or outdoors in the case of city gas. It is connected in parallel to the downstream position of the solenoid valve (9) connected to the piping section, and gas is supplied from the solenoid valve (9) through the valve supporting device (4).
Gas appliances (1)a and (1)b are connected to the pilot igniter (6) and the gas stove (2) via the cock (3), and gas appliances (1)c are connected to the cock (3). The gas stove (2) and the cock (3) bypass pipe (
10).

As shown in FIG. 2, the valve supporting device (4) has a valve housing (11
), a gas inlet (12), a gas outlet (13), and a valve seat (1a) perpendicular to its axis.
A valve port (15) that controls the opening and closing of these communication states by
and a spring (1) which is slidable in the axial direction within one end of the valve housing (11),
6) in the protruding direction, and a button (
17), and at the inner end there is an operating rod (one) to which the valve seat (14) is connected with the required play (18), and an O-ring (19) that supports this operating rod (19) in an airtight state.
20), a stopper (21) that supports this, and an operating piece (19) provided on the operating rod (19) when the operating rod (19) slides.
A normally closed switch sI that opens and closes via a normally closed switch sI and a normally open switch S2 are provided, and the other end of the valve housing (11) is provided with a normally closed switch sI that opens and closes via the An electromagnetic actuating body (26) consisting of an excitation coil (22), a fixed core (23), a spring (24), and a moving core (25) that maintains the open state of the valve port (15) is connected to a seal (
27).

FIG. 3 shows an operation control circuit for the above-mentioned branch valve device (4), flame sensor (5), pilot ignition device (6), ignition device (7), and solenoid valve (9). Circuit (30)
is a plurality of sub-control circuits (31)a, (31) corresponding to each gas appliance (1)a, (1)b, (1)c, respectively.
b, (31) C, a main control circuit (32) common to each sub-control circuit, an abnormal state detection circuit (33) that operates in an abnormal state such as a drop in gas pressure or the occurrence of an earthquake, and an alarm circuit ( 34).

Therefore, gas appliances (1)a, (1)b, (1)c
When not in use, each valve device (4) and solenoid valve (
9) is in a closed state, one control circuit switch s1 in the valve paying device (4) is ON, the other Okawa switch S2 is OFF, and the one switch S1 is in the OFF state. By turning ON, the energization state of the operation control circuit (30) is released.

From this unused state, any one gas appliance, for example (1
) When the button (17) of the valve supporting device (4) is pressed against the spring (16), the one switch S1 is turned OFF and the operation control circuit (30) is pressed. is energized, and then the other switch S2 is turned on via the play (18), and when the pilot ignition device (6) is equipped with, for example, a battery (35), the pilot ignition device (6) is lit and ignitable by the battery (35), and the valve notebook (14)
is pressed by the operating rod (18) to open the valve port (15).

On the other hand, the switch S1 for the control circuit is the first one. The first AND circuit (36) is connected to one input terminal of the AND circuit (36), and the other input terminal of the first AND circuit (36) is connected to the first O
The output end of the R circuit (37) is connected, and the input end of this OR circuit (37) is connected to the flame zancer (5), the first inverter (38), and the first inverter set to about 3 seconds, for example.
Since the switches Sl are connected to each other via the timer (39), the OFF signal from the switch St is
The output of the first OR circuit (37) is input between one input of the first AND circuit (36) and one input terminal of the first OR circuit (37) via the first timer (three). I
(And this is input to the other input terminal of the first AND circuit (36), so the output of the A N +) circuit (36) becomes [■], which is the transistor (4) for the valve supporting device.
0), the I/Landisk (40) is turned on, the electromagnetic actuator (26) of the valve supporting device (4) is energized, and the valve seat 1-(14) is pulled to open the valve port. (1
5) At the same time, the output of the first AND circuit (3G) is transmitted through the second OR circuit (41), second AND circuit (42), and third OR circuit (43) of the main control circuit (32). It is input to the base of the transistor (44) for the electric 9 valve, the transistor (44) is turned on, and the solenoid valve (9
) is energized to open the valve, and the open state of the valve supporting device (4) and the solenoid valve (9) is maintained for about 3 seconds set by the first timer (39).

While this valve supporting device (4) and solenoid valve (9) are open, gas is transferred from the gas supply source (8) to the downstream gas appliance (1).
When the gas supplied to the pilot igniter (6) is ignited, the ignition state of the pilot is determined by the flame sensor (5).
) and the flame signal generated from the flame sensor (5) is input to the first OR circuit (37) and its output is held at H, so the first timer (39) operates for about 3 seconds. Even after the output becomes L, the energization state to the valve supporting device (4) and the solenoid valve (9) is maintained, gas supply continues, and the open state of the solenoid valve (9) remains unchanged. For example, the information is displayed by an indicator lamp (45) consisting of a light emitting diode.

In addition, in item 1, if ignition is not performed within the operating time of the first timer (39), the first OR circuit (37
) becomes L, the output of the first AND circuit (36) disappears, the transistor (40) turns OFF,
The electromagnetic actuator (26) is de-energized, and the valve supporting device (4) is turned off.
The operating rod (18) and the valve seat (14) are restored by the springs (16) and (24), the valve port (15) is closed, and the output of the first AND circuit (36) disappears. As a result, the output of the second OR circuit (41) also becomes L, and the transistor (44) of the main control circuit (32) turns OFF.
As a result, the electromagnetic valve (9) is de-energized, the gas supply is cut off, the operation control circuit (30) is restored to its unused state, and the indicator lamp (45) goes out.

In this way, due to the generation of the flame signal, the supporting valve device (4)
The valve port (15) and solenoid valve (9) are opened, and the button (
When the pressure on 17) is released, the operating rod (18) will play (18).
The Kumon spring (16) corresponding to the ignition switch S2 is moved back, and only the other ignition switch S2 is restored to the open state, and one control circuit switch S1 and the valve port (15) are held open.

In this way, with the pilot flame lit, the cock (3)
Open and adjust this to supply the specified amount of gas to the gas stove (2).
When the fuel is supplied to the fuel, it is ignited from the pilot flame and becomes combustible.

Due to the above effects, other gas appliances (1)b, (1)c
Gas combustion is also performed in the same way.

The gas appliances (1)a and (1)b keep the pilot flame lit at all times and open the cock (4) when necessary to supply gas to the gas conditioner D (2) and supply the pilot flame to it. Gas appliances (1) (c) are ignited from a fire and ignited for combustion, and gas appliances (1) (c) are connected to bypass pipes (10) each time they are used. After supplying gas to the gas stove (2) and igniting it, the ``near 7'' (3) is opened and the required star gas is supplied at 5, - and 1. It is of the type that performs four steps of combustion, and is exemplified for general household use.

Next, under the normal combustion condition of the gas described above, when the gas has been extinguished due to boiling over, wind, etc., immediately strike the gas appliances (+) a and (1) b, and the pilot flame will go out. When (
If only the combustion on the gas stove goes out without the pilot flame extinguishing, as long as the pilot flame is present, the gas ejected from the gas stove will be ignited, so there is no safety problem) or gas appliances (1) ) c, when the combustion of gas conditioner 0 (2) goes out, the flame signal disappears, so the first OR circuit (37) and the first AND circuit (
36) respectively become L, and the sub control circuit (31)a
The transistor (40) is turned off, and the supporting valve device (40) is turned off.
)'s electromagnetic actuator (26) is de-energized, and valve No. 1-
(14) moves back, the valve port (5) is closed, and the gas supply to the gas appliance (1)a is cut off.

On the other hand, since the output of the first AND circuit (36) becomes +5, the output of the second OR circuit (4) also disappears.
The transistor (44) of the main control circuit (32) is OFF
As a result, the energization of the solenoid valve (9) is also cut off, and the gas supply is cut off at the source.

In the above, if at least one other gas appliance (1
) +1 to (1)c, the 1st. A
A signal is output from the ND circuit (36), and this is input to the 20th R@path (51) of the main control circuit (32), so the transistor (44) of the circuit (32) maintains the ON state. Therefore, the solenoid valve (9) maintains the gas supply without closing.

In other words, when multiple gas appliances are being used at the same time, only the valve device (4) of the gas appliance that has gone out will close, cutting off the gas flow to that part, and other gas appliances that are in a normal combustion state will be closed. The combustion state of is connected.

In -1-, gas appliances (1,) a, (1) b,
(1) When an abnormality occurs due to one of c going out, the alarm circuit (34)
is activated.

That is, each sub-control circuit (31)a, (31)b, (
31) The outputs of the OR circuits (37) in c are connected to the first NAND circuits (46) of the abnormal state detection circuit (33), so if one of the flame signals disappears,
The output of the first OR circuit (37) is 1. Then, the first
The output of the NAND circuit (46) becomes H and is input to the alarm lamp circuit (34) a and the alarm buzzer circuit (34) b in the alarm circuit (34), respectively.

That is, in the alarm lamp circuit (34)a, the signal from the oscillation circuit (47) is inputted to one input terminal, and the signal from the oscillation circuit (47) is inputted to the other input terminal of the third AND circuit (48).
When an abnormal signal is input from the AND circuit (46), the third
An output is produced from the AND circuit (48), causing a warning lamp (49), for example a light-emitting light, to blink.

Also, the first NAN input to the alarm block 1y-circuit (34)b
The abnormal signal from the D circuit (46) is sent to the second inverter (5
0) by 1. , and the second NAND circuit (5
1) into one input terminal. The other input terminal of this second NAND circuit (51) is connected to a third in-hark circuit (52).
For example, a second timer (5 seconds) set to about 0.5 seconds.
Since the series circuit with 3) is connected, the second NAND
A signal of about 0.5 seconds is output from the circuit (51), and this output is sent to the fourth flip-flop circuit (54) via the first flip-flop circuit (54). It is input to one input terminal of the A N D circuit (55). At the other input terminal of this fourth AND circuit (55),
The third AND circuit (48) of the alarm lamp circuit (34)a
) is input, so the alarm buzzer circuit (
34) By the output of the fourth AND circuit (55) of b, approximately 0
．． The buzzer (56) operates for about 5 seconds.

If the operation of the alarm buzzer circuit (34)b is to be stopped, the stop button (57) is operated to reverse the first flip-flop circuit (51). Then, the output becomes I-, the output of the fourth AND circuit (55) disappears, and the buzzer (56) stops.

Next, for example, in the gas supply state, if a gas leak occurs and the gas pressure decreases, or if an earthquake occurs, the abnormal state detection circuit (33) is activated and the alarm circuit (33) is activated.
4) is activated, and the solenoid valve (9) is closed.

That is, when the gas pressure decreases due to a gas leak or the like or an earthquake occurs, the abnormality detection sensor, such as the pressure switch S3 or seismic intensity switch S4, is activated. Then, the abnormal signal is input to the second NAND circuit (58), and its - output is input to the first NAND circuit (46).
and a second AND circuit (42) of the main control circuit (32).
In addition, the output of (1) is directly transmitted through the fourth inverter (59) and through a series circuit of the fifth inverter (60) and the third timer (61) set to about 015 seconds. The signals are respectively input to the third NAND circuit (62).

Then, the output from the first NAND circuit (46) becomes 1. Therefore, as mentioned above, the alarm circuit (34) is activated, the lamp (49) flashes, and the buzzer (5) is activated.
6) operates for about 0.5 seconds, and the main control circuit (32)
The output of the second AND circuit (42) disappears, and the output of the sixth AND circuit (42) disappears.
The main control circuit (32) is inverted by the inharter (63).
) to the second OR circuit (43) of the OR circuit (43).
) are L and L, its output becomes L, and transistor 1 (44) of the main control circuit (32) is turned OFF in slave-2, and the solenoid valve (9) is turned OFF. When the valve is closed, the indicator lamp (45) goes out.

2, after inspecting and repairing the abnormality and confirming its safety, when the reset button (64) is operated, the second flip-flop circuit (58) is reversed and the abnormal operation circuit (33) is activated. hang to return to normal condition. In addition, flame sensor (6), switch Sl, S:I.

S4, reset button (64), buzzer stop switch (57)
), the predetermined power supplies e, e', e'' used for the valve supporting device (4) and the solenoid valve (9) are appropriately obtained from the secondary side of a transformer whose downstream side is 100 cm.

Effects of the Invention As described above, according to the present application, when a plurality of gas appliances are being used at the same time and an abnormality occurs in one of the appliances, for example due to the gas being turned off, the solenoid valve in the original position is closed. The structure is designed to close only the valve supporting device of the gas appliance where the abnormality occurred, cutting off the gas supply, and maintaining the use of other gas appliances that are in normal condition. It is extremely convenient, and when all the gas appliances in use go out, or when an abnormality occurs in the gas supply circuit such as a drop in supply gas pressure, the solenoid valve can be closed together with each valve supporting device. The gas supply is cut off at the source and an alarm is also generated, ensuring safe use.
Furthermore, since the valve branching device is configured to automatically close the valve port when the electromagnetic operating body is de-energized, it has advantages such as reliable operation and excellent reliability.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is an overall diagram of a gas supply circuit, FIG. 2 is a cross-sectional view of a valve supporting device, and FIG. 3 is an operation control circuit diagram. In the diagram, (1)a, (1)b, and (1)c are gas appliances,
(2) is a gas stove, (3) is a cock, (4) is a valve device, (5) is a flame sensor, (6) is a pilot ignition device, (7
) is the ignition device, (9) is the solenoid valve, (lO) is the bypass pipe, (11) is the valve housing, (12) is the gas inlet, (13) is the gas outlet, (14) is the valve seat, ( 15) is the valve mouth, (
+6), (24) is a spring, (19) is an operating rod, (26) is an electromagnetic actuator, (30) is an operation control circuit, (
31)a, (31)b, (31)c are sub control circuits, (32) are main control circuits, (33) are abnormal state detection circuits, (34) are alarm circuits, (34)a are alarm lamp circuits , (34)b is an alarm buzzer circuit. Patent applicant Norin Kogyosha LLC

Claims (7)

[Claims] (1) A solenoid valve that is connected to the base of the gas supply circuit, shuts off the gas supply under normal conditions, and opens when electricity is applied to allow the gas supply; and a solenoid valve that is connected in parallel to the downstream position and closes under normal conditions. When the valve is manually operated against the biasing force, the valve opens to allow the gas to flow, and this state can be
A plurality of gas appliances that burn gas, each equipped with a supporting valve device having an electromagnetic actuating body that operates and holds it when energized, and a flame sensor that detects flame and outputs a flame signal, and is provided correspondingly to each gas appliance. a plurality of sub-control circuits that supply operating current to the electromagnetic actuating body for a predetermined period of time or by the flame signal when the payment device is manually operated; and at least one circuit among the plurality of sub-control circuits. 1. A gas safety device comprising: a main control circuit that supplies an operating current to the electromagnetic valve when an operating current is output from the solenoid valve. (2) The gas safety device according to claim 1, wherein the gas appliance further includes a pilot ignition device that ignites a pilot flame in response to supply of gas from the supporting valve device. (3) The gas safety device according to claim 2, wherein the gas appliance further comprises a cock that adjusts the amount of gas supplied for combustion. (4) Claim 1 comprising an alarm circuit that is activated by the disappearance signal when the flame signal disappears while the gas is being supplied.
The gas safety device according to , 2 or 3. (5) When the gas pressure drops or an earthquake occurs in the gas supply state, this state is detected and an abnormal signal is output to the alarm circuit to activate it, and an electromagnetic signal is sent to the main control circuit. 5. The gas safety device according to claim 1, further comprising an abnormal state detection circuit that denies application of operating current to the valve. (6) The gas safety device according to claim 5, wherein the abnormal state detection circuit has a reset circuit for returning the operating state to the normal state. (7) The gas safety device according to claim 4, 5 or 6, wherein the alarm circuit is comprised of an alarm lamp circuit that blinks in response to input of a disappearance signal, and an alarm buzzer circuit that operates a buzzer for a predetermined period of time.