JPS6141000Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas circuit breaker that automatically shuts off a gas flow path in the event of a gas leak or an earthquake.

In recent years, many explosions and fires have occurred due to gas leaks such as propane gas, and the damage caused has been enormous.
For this reason, various alarm devices have been developed, and in particular, alarm devices that combine a gas leak sensor and a buzzer are commonly used.

However, such a system that only uses a buzzer to notify the occurrence of a gas leak is of no use when the person is away from home because it is necessary to manually shut off the gas flow path.

Furthermore, when an earthquake occurs, evacuation efforts are slow and people sometimes forget to extinguish fires or turn off gas valves, creating a risk of secondary disasters such as explosions and fires.

The present invention was developed in consideration of these points, and it detects the occurrence of gas leaks or earthquakes and automatically shuts off the gas flow path immediately at the main valve, ensuring that explosions and fires do not occur even when no one is present. We have developed a gas circuit breaker that prevents this from occurring and increases safety.

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 5 show an embodiment of the present invention.

In the figure, 1 is a gas circuit breaker, which is installed near the propane gas cylinder or the city gas main valve.
Reference numeral 2 denotes a control unit, which is placed near the gas appliances in the room, and these are connected by lead wires.

3A is a first gas pressure regulating valve, 3B is the first gas pressure regulating valve, a second gas pressure regulating valve is branched and communicates with the outflow side of the gas flow path of 3A, and 4A is the first gas pressure regulating valve 3A. The first valve body drive shaft 4B that protrudes from the main body case 5 is a second valve body drive shaft that protrudes from the main body case 5 of the second gas pressure regulating valve 3B.

6A is the first lever, 6B is the first lever 6A
7A is a first magnet, 7B is a second magnet, and 8 is a micro switch, which are attached to a case 9 and constitute the gas cutoff section 1.

Also, 10 is a main switch, 11 is a main timer, 12 is a first timer, 12B is a second timer, 13 is a relay, 14 is an earthquake sensor,
These are attached to the case 9 and constitute the control section 2.

As shown in FIG. 2, the first gas pressure regulating valve 3A is provided with a gas inlet 15 on one side of a hollow disc-shaped main body case 5, to which a gas pipe connected to a gas cylinder (not shown) is attached. A gas outlet 16 is provided at the other end to which a gas pipe connected to an indoor gas appliance is attached.

Reference numeral 17 denotes a valve body, and this valve body 17 is connected to the first valve body drive shaft 4A via a lever 18.
The middle part of the valve body drive shaft 4A is fixed to a rubber diaphragm 19 that covers the upper part of the hollow part, and further, the upper part passes through the diaphragm 19, and the tip thereof protrudes from the upper part of the main body case 5. A coil spring 20 is inserted into the first valve drive shaft 4A inside the main body case 5, and the tip of the first valve drive shaft 4A is always urged downward.

Further, the gas outlet 1 of the first gas pressure regulating valve 4A
The internal structure of the second gas pressure regulating valve 3B, which is branched and communicated with the first gas pressure regulating valve 3A, is in the middle of the first gas pressure regulating valve 3A.
However, a micro switch 8 is provided above the second valve drive shaft 4B protruding from the main body case 5, and comes into contact with the micro switch 8.

Further, the first gas pressure regulating valve 3A protrudes from the first gas pressure regulating valve 3A.
As shown in FIG. 3, a support plate 21 and one side of a first lever 6A rotatably supported by the support plate 21 are loosely attached to the valve body drive shaft 4A, and a A stopper 22 is screwed in.

Further, an L-shaped lever 23 with a stopper is provided adjacent to the other end of the first lever 6A, and is rotatably supported by a support base 24. A stopper 25 formed at one end of the lever 23 is provided so as to be freely engageable and detachable from the first lever 6A, and is constantly biased in the direction of the arrow by a coil spring 20. A first magnet 7A is arranged adjacent to this.

A second lever 6B is connected to the first lever 6A.
As shown in FIG. 4, the lever 6B is formed in a U-shape, one end of which is rotatably supported by the first lever 6A and the other end of which is rotatably supported by the support base 24, and the second magnet 7B is disposed adjacent to the middle portion.

Furthermore, as shown in FIG. 5, the earthquake sensor 14 provided in the control unit 2 has a weight 28 connected to the tip of a shaft 26 via a chain 27, a disk 29 fixed to the middle of the shaft 26, and A coil spring 20 for sensitivity adjustment is attached below this, and is attached to a U-shaped bracket 30. Said disk 29
A contact lever 31A of the switch 31 is in contact with the lower surface of the switch 31, and is constantly urged downward by the coil spring 20.

The main switch 10 is also connected to the power source 32.
is connected to a relay 13 via a main timer 11, as shown in FIG. This main timer 11 can be set within a range of several hours, and the power is cut off after the set time has elapsed.

Further, a micro switch 8 disposed above and close to the second gas pressure regulating valve 3B is connected to the first timer 12A, and further via a relay 13, a micro switch 8 disposed close to the lever with a stopper 23 is connected to the first timer 12A. 1 magnet 7A. The micro switch 8 is turned on when the second valve drive shaft 4B is lowered, and the first timer 12A is operated for about 5 seconds, for example.

Further, a switch 31 placed near the earthquake sensor 14 is connected to a second timer 12B, and further connected via a relay 13 to a second magnet 7B that operates a second lever 6B.
Note that the second timer 12B also uses a mechanism that operates for about 5 seconds, for example.

Next, the operation of the gas circuit breaker having the above configuration will be explained. First, when the main switch 10 is turned on, the main timer 11 whose operating time is set to, for example, two hours starts operating. When the gas appliance is not in use, the first valve body drive shaft 4A of the first gas pressure regulating valve 3A rises, and accordingly, the first valve body drive shaft 4A rises.
As shown in FIG. 3, the tip of the lever 6A is engaged with a stopper 25 of a lever 23 with a stopper that is biased by a spring 20, and the valve body 17 closes the gas inlet 15 and the gas outlet 16. It becomes a state. On the other hand, the second gas pressure regulating valve 3B
The valve body drive shaft 4B is also in a raised state, pushing up the contact point of the micro switch 8 and making contact with it.

When the tap of the gas appliance is opened, the internal pressure of the second gas pressure regulating valve 3B decreases, and as the second valve drive shaft 4B descends, the contact point of the micro switch 8 that was in contact with it descends. Then, it turns on. When the micro switch 8 is turned on, the first
The first magnet 7A is energized for several seconds via the timer 12A and relay 13. As a result, the lever 23 with a stopper rotates and attracts the first magnet 7A, the stopper 25 comes off as shown by the imaginary line in FIG. 3, the first lever 6A rotates, and the first The first valve body drive shaft 4A of the gas pressure regulating valve 3A is lowered to open the gas flow path and allow gas to flow.

When the gas appliance is turned off, the internal pressure of the first and second gas pressure regulating valves 3A, 3B increases, pushing up the diaphragm 19, and accordingly, the first and second gas pressure regulating valves 3A, 3B increase.
The valve body drive shafts 4A, 4B are pushed up, the gas inlet 15 is closed by the valve body 17, and the gas flow path is cut off. At this time, the first lever 6A connected to the upper end of the first valve body drive shaft 4A rotates, and its tip is engaged and locked by the stopper 25, as shown by the solid line in FIG. 3. . For this reason, the gas flow path is blocked by the gas cutoff unit 1 placed near the propane gas cylinder or the city gas main valve, thereby reliably blocking gas leaks due to corrosion of the gas pipe between the gas appliance and the gas appliance. There is no need to close the main valve each time you use it.

Furthermore, if the set time of the main timer 11 expires while the gas appliance is being used, the gas flow path remains open, but once the tap of the gas appliance is closed, the first valve opens. Body drive shaft 4A
is raised, the first lever 6A is locked by the stopper 25 as in FIG. 3, and the main switch 10 is
Unless the gas appliance is reset, the gas flow path will remain blocked even if the gas appliance valve is opened, further improving safety.

When an earthquake occurs and the control unit 2 installed near the gas appliance shakes, the weight 2 of the earthquake sensor 14
8 falls over as shown by the imaginary line in Figure 5, and the chain 2
The shaft 26 connected via 7 is pulled up.
As a result, the disk 29 attached to the shaft 26 rises,
In conjunction with this, the contact lever 31A of the switch 31 rotates and enters the on state. When switch 31 is turned on, second timer 12B and relay 13
The second magnet 7B is energized for several seconds. Therefore, the second lever 6B, which is disposed close to the second magnet 7B, rotates from the imaginary line to the solid line to attract the second magnet 7B. At this time, the first lever 6A rotates in conjunction with the second lever 6B, and as shown by the solid line in FIG. 3, pulls up the first valve body drive shaft 4A and blocks the gas flow path. It is locked with stopper 25. Note that the relay 13 will not operate if the earthquake sensor 14 is activated and the weight 28 remains tipped over, so when using a gas appliance, pull down the string 33 attached to the shaft 26.
It is necessary to reset the weight 28.

Although the above embodiment shows the case where the earthquake sensor 14 is used as a sensor, a gas leak sensor that electrically detects a gas leak and notifies the user with a buzzer or the like may also be used, or a combination of both may be used. It would be nice if a fire sensor could also be added.

Further, the main timer 11 was used as a double safety mechanism when not in use for a long time, but in the present invention, it may be provided as necessary.

As explained above, the gas circuit breaker according to the present invention detects the occurrence of gas leaks or earthquakes and immediately automatically shuts off the gas flow path at the main valve, preventing explosions and fires even when no one is present. It is possible to reliably prevent the occurrence of such problems and improve safety.

[Brief explanation of drawings]

Figures 1 to 5 are according to one embodiment of the present invention, with Figure 1 being a schematic plan view of a gas circuit breaker, and Figure 2 showing a partially cutaway view of the first and second gas pressure regulating valves. The front view and Figure 3 show the first gas pressure regulating valve attached to the first gas pressure regulating valve.
Fig. 4 is a side view showing the operating state of the valve body drive shaft and the lever with a stopper; Fig. 4 is a side view showing the operating state of the second lever and the second magnet;
The figure is a side view showing an earthquake sensor. DESCRIPTION OF SYMBOLS 1... Gas cutoff part, 2... Control part, 3A... First gas pressure regulating valve, 3B... Second gas pressure regulating valve, 4
A...First valve body drive shaft, 4B...Second valve body drive shaft, 5...Main body case, 6A...First lever, 6B...Second lever, 7A...First valve body case Magnet, 7B...Second magnet, 8...Micro switch, 10...Main switch, 11...
...Main timer, 12A...1st timer,
12B...Second timer, 13...Relay, 1
4...Earthquake sensor, 15...Gas inlet, 19
...Diaphragm, 23...Lever with stopper, 25...Stopper, 28...Weight, 31...
...Switch.

Claims (1)

[Scope of utility model registration request] a first gas pressure regulating valve that operates a valve body drive shaft by expansion and contraction of a diaphragm; a second gas pressure regulating valve having a gas passage communicating with the first gas pressure regulating valve;
a first lever attached to the tip of the first valve body drive shaft protruding from the main body case of the first gas pressure regulating valve; a lever with a stopper that detachably locks the first lever; a first magnet for rotating the lever; a second valve body drive shaft protruding from the main body case of the second gas pressure regulating valve;
a switch that is arranged opposite to the tip of the second valve body drive shaft and that drives the first magnet through contact operation; and a second lever that is connected to the first lever and operates in conjunction with the first lever. , a second magnet for rotating this second lever, and a sensor for detecting gas leaks or earthquakes electrically connected to this second magnet.