JPS5872010A - Gas meter with interrupting mechanism - Google Patents

Abstract

PURPOSE:To obtain a reliable and inexpensive gas meter with an interrupter by inserting a valve device consisting of an electromagnet which is closed by an electric signal into the inlet part of the upper case in a gas meter and further making said device resettable manually from the outside. CONSTITUTION:If there is a need for interrupting the supply of gas in the event of abnormality, one-shot current is supplied to the coil 28 of an electromagnet 24, and the reverse magnetic field of a permanent magnet 31 is generated in a magnetic circuit, then the magnet 31 loses the attracting force for an iron core 32 and the core 32 and a valve body 23 are detached from the electromagnet 24 by the repulsive force of a detaching spring 33, by which the body 23 is brought into abutment on a valve seat 22 and closes the valve device to stop the supply of the gas, whereby safety is assured. To reset the interrupter after the abnormal state is checked and eliminated, a resetting lever 27 is operated to turn, then a valve opening cam 25 turns and abuts and abuts on the part near the central projection of the body 23. The body 23 is forced downward by the cam 25 and is detached from the seat 22, by which valve is opened. The core 32 abuts on the magnet 31 and is held attracted thereto, whereby the valve device is kept open.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas meter with a shutoff mechanism that shuts off gas when the gas flow rate deviates from a specified range or in an emergency.

In the event of an emergency such as an earthquake, power outage, or leakage of unburned gas in indoor gas piping, or when the gas flow rate exceeds the specified range.
- When it is necessary to automatically shut off the gas supply for safety reasons, such as when the gas meter is in use, conventionally a solenoid valve is inserted into the gas pipe near the gas meter. B, which has a sensor, performs a blocking operation based on a cutoff signal from a gas usage status monitor, etc. However, solenoid valves are expensive, and it takes a lot of work to install them in piping, and there are many difficulties in installing them, especially in the case of existing piping. . The present invention is an attempt to solve these primary disadvantages by inserting an electromagnetic valve device into the upper case inlet of the gas meter that closes the valve in response to an electric signal, and also allows the return operation to be manually operated from the outside. The present invention is to provide a reliable and inexpensive gas meter with a shut-off device that incorporates a small, low-voltage driven valve device.The present invention will be described in detail below based on an actual FI+i example.

In Figures 1 and 2, 1 is the main body, 2 is a measuring membrane made of a gono diaphragm etc. inserted into the measuring chamber 3 in the main body, and 11G''I-2 is the As shown in Figure 2, the measuring chamber 3 is divided into front and rear parts, and due to the pressure difference between the gases entering the chamber 3, 111 (back and forth movement) is performed. 1ifi crank 4 and wing 1
111115's back-and-forth rotational motion and scooping are transmitted to the prisoner 6 as rotational oscillations.

There is another one-liter chamber behind the main body 1 in Figure 2.
Similarly, the movement of the other set of measuring membranes is transmitted as a rotation and oscillation of the large armrest 6, 6', and the same rotational oscillation of the large armrest 6 and 6' F1 and small 7°7 ' The rotational directions of the crank arm 8 are transmitted as three downward movements of the crank arm 8 through -t and F.
It is oscillating at m degrees. The rotation of the crank arm 8 is caused by the rotation of the shaft 9, and one side is decelerated through the entire worm gear box 10 and transmitted to the measuring mechanism as the rotation of the particle 1 transmission shaft 11, and the other side is the rotation of the crank I drawer 12. Connecting chamber 3.3' through rotating connecting plates 13 and 13'
Slide valves 14 and 14' that control the opening and closing of gas entering and exiting the interior (back side 1 not shown) are swung as levers 15 and 15', and 16 and 16' are valve ports thereof, and 17
is the gas body outlet. That is, the eye movement of the metering membrane is converted into a rotary motion, and the rotary motion is transmitted to the metering mechanism and the slide valve section, and these mechanisms are integrally formed in the main body 1. Reference numeral 18 denotes the upper case of the main body 1, which serves as the outer casing of the rotation mechanism chamber 18' in which the aforementioned rotation mechanism parts and the like are housed.
0 and a meter case 21 in which a metering mechanism is housed is integrally formed. 10 more cases 1
8 is provided with a valve seat 22 near the gas population 19, and a valve body 23 and an electromagnet 24 are integrally installed in the upper case at a position opposite to the valve seat 22. 24 forms a valve device, and this valve device is housed in the empty space of the rotating mechanism section. 25 is a valve opening cam that opens the valve device, and is provided so as to come into contact with the valve body 23 on the upstream side of the valve seat 22; -26 is the return shaft;
Reference numeral 7 is configured to operate the outer part of the upper case 18 by one rotation v1 with its return lever.

Figures 3M and 4 [Details of the valve device 4111] The electric I face stone 24 is integrated with the coil 28, coil bobbin 29, yoke 30 = permanent magnet 31 provided integrally with the yoke 3oVc - the valve body 23. Possible U1 core 32 structure 1+lj and 1.
- When the coil 28 is not connected to the coil 28, the iron core 32 overcomes the spring 33 and is attracted to the permanent magnet 31, and the valve body 23 is in the open tr state with the valve seat 22 being older than the valve seat 22.

Further, the return lever 27 is locked at the place where it comes into contact with the locking pin 36 by the rotational return spring 34 -J1. te” 9s,
In this state, the insertion direction of the valve opening cam 25 i1', 4':
Ij [separated from the valve body 23 at lr4) 1, direction f
"Yes": It is configured.

The present invention has the above configuration, and the primary KIIrI+ operation will be explained using FIGS. Under normal conditions, the gas flow 0-J' enters the upper case 18 from the inlet 19, enters the metering chamber 3. At this time, the metering 11α2.2' (the back side not shown) moved back and forth and entered the metering chamber, but the gas flowed through the valve ports 16, 16' and the slide valve 14.14'117.
) Passing through a passageway (not shown) formed on the side of the valve, it is pushed out to the main body outlet 17 and is supplied to the indoor gas supply port from the outlet 2o. On the other hand, the movement of the metering membrane is carried out through the blade shaft 6.5', the large armrest 6.6', the small armrest 7, 7', and the crank arm 8.
is converted into rotational motion. One side of the rotation is transmitted to the metering mechanism through the shaft 9, the worm gear, and the metering transmission shaft 11, and the amount of gas used is displayed on a counter.
, 13' to swing the slide valves 14, 14', the valve ports 16, 16' slide open and close, gas enters and exits the metering chambers 3, 3', and the operation continues. As described in the description of the structure, the normal state of the electromagnet is such that the coil 28 is not energized, the iron core 32 is attracted to the permanent magnet 31, and the valve element 23 is separated from the valve seat 22 in an open state.

Next, in the event of an abnormality, such as when the gas flow rate deviates from the specified range (as determined by a flow rate sensor or microcomputer (not shown)), or in an emergency due to an indoor gas leak detected by a detector or seismic device, etc. If you feel safe cutting off the gas supply, press 7.
When a one-shot current is applied to the coil 28 of the magnet 24, a reverse magnetic field of the permanent magnet 31 is generated in the magnetic circuit composed of the iron core 32, the yoke 30, etc.
The iron core 32 and the valve body 23 are disengaged from the electromagnet 2 a j due to the complete force of the detachment spring 33, and the body 23 comes into contact with the valve seat 22, and the valve device r1 is closed. Gas supply will be stopped to ensure safety. Gas supply is cut off, how can I check the status? It is displayed externally using a mechanical or mechanical means, and is not shown in the figure. Next, -1, IL+, when the status is confirmed and removed and the interrupting device is reset, v, 1, return lever 2
Approximately % rotation + 1 rotation for 7 rotation return spring 34
To perform a J+ operation: The valve opening cam 25 rotates via the return shaft 26, and a valve opening force is applied near the central convex portion of the valve body 23 that hits the valve seat 22 and closes the valve. 1 and 25 come into contact with each other, and first contact in the radial direction of the cam or C) in the radial direction according to the rotation of the cam. The valve body 23 is moved away from the valve seat 22 to open the valve, and the iron core 32 is pushed down by the permanent magnet 31.
The valve device is held in an open state by being attracted to the valve. Note that in this dark state, that is, in normal times, the coil 28 is not energized and does not function as an electromagnet. If the valve device is kept open, the rotation return spring 3 is released by releasing the return lever operation.
4, the valve opening cam 25 and the return lever 27 are returned to the state before the operation, resulting in the state shown by the solid line in FIGS. 3 and 4, and normal use of the gas meter is resumed.

Note that the present invention incorporates a valve device using an electromagnet near the inlet of the case in the gas meter, and the configuration of the valve seat, valve body, electromagnet arrangement, return means, etc. is the same as that of the above embodiment. As described above, the present invention provides a shutoff system that can reliably cut off gas supply using a simple device in the event of an abnormality or emergency, and also allows for easy and reliable return operation after safety has been confirmed. This provides a gas meter with a device and has the following effects.

(1) Without changing the original structure of the gas meter,
Except for the operating lever for return, the cutoff and return device is a simple 11-piece in the empty space inside the meter, making it a reliable and inexpensive cutoff device gas meter, as well as a solenoid valve or the like as a cutoff device. There is no need to install it externally in the gas piping, and it can be attached to existing piping.It is also superior in terms of TCJT performance. ing.

1) To hold the valve open, use a permanent magnet. 1-1 Electromagnet r1 acts only on the first valve-closing head, and returns i ['L11i1+ 1-'
74, the electromagnet rt generates an instantaneous repulsive magnetic field that removes the adsorption and holding force of the permanent magnet. This is also possible and is suitable as a one-meter built-in interrupter.

) The return operation of the valve device can be performed with a cam from the valve device's 1st flow (1111), and in addition, by operating the external cam, the return operation is simple and reliable. The return operation can be easily performed from the outside by 11 degrees, making it excellent as a household gas meter with a shutoff device.

[Brief explanation of the drawing]

FIG. 1 is a partial plan view showing one embodiment of a gas meter with a shutoff mechanism of the present invention, FIG. 2 is a partial front view of the same gas meter, and FIGS. 3 and 4 are enlarged views of essential parts of the shutoff mechanism. 2... Measuring membrane, 3... Dividing chamber, 4...
...Movable crank, 5... Wing shaft, 6,6'
......Ojijikin, 7.7'----...Kojichigane, 8
・Bone...Crank arm, 11...Metric transmission shaft-12...Crankshaft, 13, 13'
...Connection plate, 14, IA'...Slide valve, 16, 16'-61--Valve port, 18-
-----Upper case, 18'...Rotating mechanism chamber,
19...Gas inlet-20-------Gas outlet, 22-------Valve seat, 23-, ---Valve body-24
......Electromagnet-26...Valve opening cam, 26
■... Return shaft, 27... Cloudy... Fist return lever. Name of agent: Ben 1411 Toshio Nakao and 1 other person
Figure 1 Figure 3 Figure 4 60-

Claims (2)

[Claims] (1) A metering chamber that sends out gas by the movement of the metering organ;
a rotating mechanism chamber having a mechanism for converting the membrane motion into rotational motion and transmitting it to a metering mechanism and a slide valve section that opens and closes a gas passage; and a case having an inlet and an inlet for gas in an outer casing of the rotating mechanism chamber; Front = a A gas meter with a shutoff mechanism that opens and closes a gas passage by installing a valve body driven by an electromagnet near the inlet inside the upper case. (2) The gas meter with a shutoff mechanism according to claim 1, wherein the valve is closed by the action of an electromagnet in response to an electric signal when the valve is closed, and the valve body is returned by manual operation when the valve is opened. (3) A gas meter with a shutoff mechanism according to claim 2, in which a cam for opening the valve body is provided on the upstream side of the valve body and the cam is operated from outside the upper case via a return shaft.