JPS5888617A - Gas meter provided with shut-off device - Google Patents

Abstract

PURPOSE:To shut supply gas off securely through simple constitution during a fault by incorporating a shut-off valve device in a gas meter. CONSTITUTION:When supply gas should be shut off in case of a fault or emergency, a one-shot current is fed to the coil 25 of an electromagnet 24, a perma- nent magnet 28 loses the attractive force of an iron core 29 by the reverse magnetic field of the permanent magnet 28, and a valve body 23 is separated by the electromagnet 24 by the repulsive force of a separating spring 31; and the valve body 23 abuts on a valve seat 22 to close a valve device, and the supply gas is shut off to secure safety. In this case, upstream pressure, i.e. original pressure operates on the valve body 23 in a valve closing direction, so the valve is closed by both the original pressure operating on the valve body 23 and spring 31. Therefore, enough force to close the valve device is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a strip cutting device (1) for cutting off gas when the waste diversion exceeds the range or in an emergency.

In indoor waste piping, emergency situations such as 110 earthquakes, power outages, and leaks of unburned gas, 11, gas flow) are used outside of the specified range, and 114
Automatically shut off waste supply for safety 1-1 reasons such as 1;
If it is necessary to close the valve, conventionally, a solenoid valve is inserted into the waste piping near the J Smeter, and the blocking operation is triggered by a cutoff signal from the waste leakage sensor f + gv earthquake sensor or gas usage status 1gζ1 - celebration device. There was bamboo. L7 solenoid e is a hatchet price, and it is installed in the middle of piping.
Pretending to go through a lot of effort to get 1! 1) In the case of existing piping, there were many problems such as the fact that there were often obstacles to the removal point.

The present invention eliminates the drawbacks of -1 above, and provides a 171 underground 1Lfjj disconnection device with reliable shutoff and a very inexpensive 1Lfjj disconnection device. I have a purpose. .

The present invention achieves the j1 arrangement target 1/)/, and a shutoff valve device is installed inside the cassnotator, and the valve is closed by an electromagnet at the outlet of the F case [-1 passage section, and the valve is closed in the valve closing direction. ni]−
The valve device is configured so that the downstream pressure acts on it.
, one embodiment of the present invention will be described with reference to the accompanying drawings.

In Figures 1 and 2, 1 is the main body, 2 is a metering membrane made of a comb diaphragm etc. which is incorporated in the measuring chamber 3 in the main body, and 2 is the measuring chamber 3 in Figure 2. is divided into front and rear parts, and due to the pressure difference of the gas entering the measuring chamber 3,
After tJ, a movement is performed, and this movement causes a back-and-forth rotation movement of the trade shaft 5 through the movable crank 4, which is transmitted to the large armrest 6 formed integrally therewith as a rotational swing motion. Main body 1 in Figure 2
There is another measuring chamber behind the , and in the same way, the movement of the other set of measuring membranes is transmitted as the rotational oscillation of the large armrest σ, and the rotational oscillation of the large armrest 6, 6' is transmitted to the small elbow. Each direction of rotation swings at a constant angle so that the rotational movement of the crank arm 8 is transmitted through the metal parts 7 and 7'. The rotation of the crank arm 8 becomes the rotation of the shaft 9, and one side is decelerated through the worm gear box 10 and the split cloth transmission 11 (1
The first rotation becomes 11 rotations and is transmitted to the depressing mechanism.
H crack 1lill Rotate 12 and crack/ri 13
, 1 Gotosuke l~te cloth room 3゜3' (back side not shown)
Slide valve 14 for opening/closing side 1341 of the nozzle that goes in and out; 1114 ij, “Δ and for the main body of Nonozu [
-1. In other words, the 11 motions of ecstasy are converted into 11 rotational motions, and the rotational motions are transmitted to the armour-mechanism and the slide valve section, and these mechanisms are formed into the main body 1 and the body weight. .18 is one case of the main body 1, which is the outer casing of the rotary machine 4-u8 chamber 18' in which the rotating mechanism and other parts are housed. There is one passage 2o, and a total of 1d space 21 in which the ecstasy mechanism is housed is integrally formed. -] A valve F1^l/g22 facing upstream is provided in the middle of the passage 2o, and a part #4i facing the valve seat 22, a vrCjt body 23 and an electromagnet 24 are fixed to a partially protruding part of the seventh case, 1- in the closing direction of the valve body 23 when the valve is closed.
The valve device is constructed so that the pressure of the four streams, that is, the source pressure acts on it.

FIG. 3 is a detailed view of the valve device, in which the electromagnet 24 is connected to the coil 26.
Coil bobbin 26. York 27. A permanent magnet 2B integrated with the yoke 27, a movable iron core 29 integrated with the valve body 23, and a spacer 30 between the permanent magnet and the movable iron core.
When the coil 26 is not energized, the iron core 29 overcomes the detachment spring 31 and the permanent magnet 28
The valve element 23 is separated from the valve seat 22 and is in an open state.

When it is necessary to shut off the gas, a magnetic field opposite to the magnetic field formed by the polarity of the permanent magnet 28 is created by energizing the coil, the attraction force is removed, and the repulsion force of the detachment spring 31 causes the valve body 2 to be shut off.
3 moves to close the valve seat 22. 32 A return shaft is used to return the valve to the open state when the valve is closed, and it is integrated with the movable iron core 29, and is returned by inserting a lever or the like through the notch 34 of the capture cap 33 and operating it from the outside in the direction of attraction of the permanent magnet. It is configured like this.

Next, FIG. 4 shows the electromagnet 24 and coil part 26 of FIG. 3 provided outside the gas passage, and the valve seat 2 inside the gas passage.
2 and the valve body 23 are opened and closed from the 4 and 11 parts.

The present invention has the above structure, and next, following the 4j II work, Fig. 1, Fig. 2, and the 31st S1. This will be explained using FIG. Under normal conditions, -) Gas flow is for people 1-11.
9 to 10 case 18, valve 1116, 16', J
There are two people in the mourning chambers 3 and 3', and the number of people 1-111 is increased by the pressure difference between the pressure that leads to 1 and 2 and 2'.
(back side, not shown) moves back and forth, and the gas that has entered the metering chamber in one phase passes through passages (not shown) formed on the valve sides of valves II 16, 16' and slide valves 14, 14'. 1 for main body] 17, and then 1. The valve device installed on the way to Exit 1-11 of Ichiro 20 in Part 18 is in an open state under normal conditions, and the gas that has passed through Exit 1] passage 20 exits the gas meter and is supplied to the indoor gas supply ] - The movement of Mankei 2, 2' is converted into the rotational movement of Reishi 6° 5', Inujigane 6, 6', Kogukin 7.ffItnI, Chikrank arm 8. .The power of that rotation is iql 9, Form Gear, Warefuden: ;'61fl+
11 to the metering mechanism in the meter case 21, and the amount of gas used is displayed on a counter.On the other hand, the crankshaft 12 rotates by closing @119, and slides through the cranks 13 and 13'. Valve 14゜1
4', the valves D I 6 and 16' slide open and close, and gas enters and exits the metering chambers 3 and 3', and the operation continues. In the normal state of the electromagnet 24, as described above, the coil 26 is not energized, the iron core 29 is attracted to the permanent magnet 28, and the valve body 23 is separated from the valve seat 22 in an open state.

Next, when an abnormality occurs, for example, when the gas flow meter deviates from the specified range (determined by a flow sensor or microcomputer (not shown))
, or when it is necessary to shut off the gas supply, such as in an emergency due to detection by an indoor gas leak detector or seismic sensor, etc.
A one-shot current is applied to the coil 25 of the electromagnet 24, and the reverse magnetic field of the permanent magnet 28 causes the permanent magnet 28 to lose the attraction force of the iron core 29 and release the release spring 31 to the magnetic circuit composed of the iron core 29° yoke 27, etc. The repulsive force causes the valve body 23 to separate from the electromagnet 24, and the JF body 23 comes into contact with the valve seat 22, so that the valve device is closed, the waste supply H is stopped, and safety is ensured. [The closing force of the device is 5, and H is applied to the valve body 23.]
In the direction of the valve closing force, two forces, that is, the source pressure are generated, so the valve is closed by the force of both the source pressure acting on the body 23 and the spring 31. Therefore, the valve closing force is sufficient.)
rooster 1- is high (l, j closed 11- force also increases, i
1. If the spring force is weak, the force to maintain the open state of the valve can be weakened by the permanent magnet 28. Therefore, the force when applying a reverse magnetic field to the electromagnet 24 to cause it to repel becomes weaker, that is, the specifications of the electromagnet coil 25 can be made smaller.

On the other hand, confirmation of the state in which the gas supply has been cut off is to be displayed externally using electrical or mechanical means, but Figure J7 is omitted here. Next, the abnormal condition is confirmed and removed and J'1. For example, when the return shaft 32 is operated from the outside, the valve body 23 is lifted and is attracted and held by a permanent magnet against the spring 31, thereby maintaining the valve open state. That is, the state shown in FIGS. 3 and 4 will be reached, and the normal use of the IIn will be resumed.

The operation shown in FIG. 4 is similar to that shown in FIG. 3, but the coil 26 is located outside the gas passage, making it even safer in case something goes wrong.

As described above, the present invention provides a gas meter with a shutoff device that can reliably shut off the gas supply with a simple device in the event of an abnormality or emergency, and can also easily and reliably perform a return operation after safety has been confirmed. It has the following effects.

(1) A cut-off device is installed inside the meter with a simple structure without changing the original structure of the gas meter, and it is a reliable and inexpensive gas meter with a cut-off device. There is no need to install it externally, and it is also easy to install on new or existing piping.

(2) The permanent magnet inside the electromagnet is used to hold the valve open, and the electromagnet acts only on the opening of the valve to close it, and manual operation is required to return the valve after opening. The valve closing force d at P, the force of the source pressure acting on the valve body is added, and the closing force by the spring can be weakened, resulting in a smaller coil specification for the electromagnet, which is often referred to as a small, low-power electromagnet. The power consumption is small, and it is possible to use a single battery as a single source, making Ir suitable as a built-in meter cut-off device.

(3) The configuration of the valve device is simple, and safety is further improved by providing the electromagnet coil section outside the J) Suwakuro.
- In addition to making it possible to conduct one-shot current to the coil, processing of the lead wire is easy because it is external, and -j
- In addition, the return operation of the valve device is easier than simply returning the return shaft, making it an excellent home-use shutoff device Lj casmeter.

[Brief explanation of drawings]

Fig. 1 is a partial plan view showing an embodiment of the gas meter of the shutoff device according to the present invention, and Fig. 2 is a partial plan view showing an embodiment of the gas meter.
Figure 3 is an enlarged view of the main parts of the 'J, jQ cutting device.
The figure is an enlarged view of main parts of another embodiment of the shutoff device. 2...-Measurement membrane, 3, 3'--Measuring chamber, 4-...
Movable crank, 5... wing shaft, 6, 6'... human armrest, 7゜7'... small elbow arm, 8... crank arm, 11... measurement Transmission shaft, 12...Crank Il+, 13, 13'...Crank, 14,
14'-...Slide valve, 16, 16'...
jflll, 18...1-case, 18'...
Rotating mechanism room, 19... gas person (], 20... exit 1
1 passage, 22-...'jP seat, 23...-valve body, 24
...Electromagnet, 32...Return/Yaft. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (3)

[Claims] (1) A metering chamber that sends out gas by the membrane movement of a metering membrane;
A rotation mechanism chamber having a mechanism for converting the membrane oscillation into rotational motion and transmitting it to the metering structure and a slide valve section for opening and closing the gas passage, and an outer casing of the rotation mechanism chamber having a gas inlet/output passage. an upper case, and a valve seat facing upstream and a valve body driven by an electromagnet are provided in a part of the outlet passage of the upper case,
A gas meter with a shutoff device comprising a valve device that opens and closes a gas passage so that pressure on the -1-stream side in the valve closing direction acts on the valve body when the valve is closed. (2) The shutoff device Iζ1 gas meter according to claim 1, wherein the electromagnet portion of the valve device is provided outside the gas passage. (3) The valve is closed by an electric signal, and the valve is closed by the action of an electromagnet.
. A gas meter with a shutoff device according to claim 1, wherein the valve is opened by returning the valve system by manual operation from outside the meter.