JPH0368326B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dry gas meter incorporating a gas cutoff mechanism in an emergency, and particularly relates to a method of providing a control device that operates an electromagnetic device that performs a cutoff operation and an electrical connection configuration between both devices. It is something.

When an abnormality occurs for some reason in a home's indoor gas piping and the gas supply must be cut off urgently and automatically, conventionally, a solenoid valve is inserted into the main piping and a closing operation is performed in response to a cutoff signal. I was gone.
However, inserting a solenoid valve not only complicates piping work, but also may not be able to find a position to insert the solenoid valve in existing piping. In addition, since the solenoid valve and the control device that sends the cutoff signal are connected by a cable line, there is a risk that the cable line may be cut for some reason, making it impossible to use gas or preventing it from functioning as a safety device. It was hot too.

The present invention is an attempt to solve the above-mentioned drawbacks, and includes a built-in shutoff function in the gas meter, a control device attached to the gas meter body without complicating construction work, or an increase in installation space.
The feature is that the cable wires are not exposed to the outside. That is, it houses a metering chamber that houses a metering means for measuring the gas flow rate, a transmission mechanism provided in the upper part of the metering chamber that transmits the operation of the metering means to the instruction means, and an electromagnetic device that operates the means for stopping the flow of gas. a mechanism chamber, an indicator case protruding from one side of the mechanism chamber and housing the indicator, and a control device for operating the electromagnetic device; has a controller chamber provided on the side surface of the controller, a communication path that communicates the mechanism room and the controller room, and an airtight terminal provided in the mechanism room, and the controller is connected to the electromagnetic device through the communication path and the airtight terminal. The device is electrically connected.

Hereinafter, the present invention will be explained in detail based on Examples. The figure shows an embodiment of a dry gas meter according to the present invention, and the gas meter has a measuring chamber case 1, an upper case 2, an indicator case 3, and a measuring chamber case 1, as shown in FIGS. 1 to 3. The outer shape is formed by a controller case 4 and a belly plate 5 located at the front and rear. The upper case 2 has a gas inlet 6 and a gas outlet 7, and the indicator case 3 has a display window 8 for reading the amount of gas used. A control lid 9 prevents rainwater from entering the front side of the controller case 4, and an inspection window 10 is also provided in this area for checking the operating state. All of these windows are fitted with glass.

The operating principle and mechanism as a dry gas meter are the same as conventional ones, so they will not be described in detail.
The following description will be made based on FIGS.

The reciprocating motion of the metering membrane 11 is transmitted to the blade shafts 13, 13' via the vane plate 12, and the large armrests 14, 14', the small armrests 15, 15', the first crank plate 16, the second
This is converted into rotational motion by the crank plate 17.
This movement is controlled by the connecting plates 18, 18' of the valve 1.
9, 19', and this valve 19, 1
The rotational movement is continued by appropriately applying gas to the metering membrane 11 and another metering membrane 11' (not shown) by the metering membrane 9'. The rotational motion is decelerated by the gearbox 20 and transmitted to the output shaft 21. This rotation of the output shaft 21 is transmitted to the indicator mechanism in the indicator case 3 to display the gas consumption amount, but since this part is a well-known structure, the explanation will be omitted.

Now, the shutoff operation will be explained next. Second
The crank plate 17 has an engaging portion 17' that protrudes outward from the gear box 20 and rotates.
Claw portion 22' of locking piece 22 pivotally supported by output shaft 21
is located within the rotational range of the second crank plate 17, and in normal operation, the permanent magnet 23 provided at the other end of the locking piece 22 is attracted to the electromagnetic device 24, as shown in FIG. The claw portion 22' is located below the second crank plate 17. Therefore, there is no support for the rotational movement, and the gas is metered and delivered from the gas meter. Next, the permanent magnet 2 is connected to the electromagnetic device 24.
If a current with a polarity that cancels out the attraction force of 3 is supplied even momentarily, the locking piece 22 will rotate counterclockwise in FIG. , engaging portion 17'
Rotation is prevented with the claws 22' in contact with each other.
When the rotation is interrupted, the switching operation of the valves 19, 19' is stopped, the reciprocating movement of the metering membranes 11, 11' is also stopped, and the gas supply can be cut off. Locking piece 2
2 is designed so that in its natural state, the left side in Figure 5 is heavier and rotates counterclockwise, and the permanent magnet 23
If the attraction force is appropriately selected, the current value and required energization time for interruption can be reduced. It is also possible to prevent the locking piece 22 from coming off naturally from the locked state to the rotatable state.

Next, when returning the locking piece 22, the left side of the locking piece 22 is in contact with the top of the cam 25, so if the cam 25 is turned counterclockwise in FIG. Piece 22 is rotated clockwise,
Finally, the engagement between the claw 22' and the engaging portion 17' is released, and the permanent magnet 23 attracts the magnet to the electromagnetic device 24. This will return the system to normal as shown in Figure 5. A pin 27 is driven into the camshaft 26, and rotational force is applied to the camshaft 26 by a reset knob 28 provided at a corresponding position on the upper case 2. For ease of assembly, a mechanism that can be separated and that only applies rotational force, such as a universal joint, is suitable here.

In the above embodiment, the gas stop means utilizes a transmission mechanism, but in addition to this, a valve seat is formed at a position where the gas inlet 6 of the upper case 2 faces the mechanism chamber 29, and a valve that opens and closes this valve seat is provided. It may be something that operates the body using an electromagnetic device.

Wing shaft 1 that converts the motion of the metering membrane 11 into rotational motion
3, 13', large and small armrests 14, 14', 15, 1
5' and two crank plates 16, 17, a locking mechanism consisting of an engaging portion 17' of the second crank plate 17 and a locking piece 22, and an electromagnetic device 24. Both are provided in a mechanism chamber 29 enclosed by the upper case 2, which is filled with gas and communicates with the gas inlet 6. In order to supply current to the electromagnetic device 24, it is necessary to connect an electric wire from the outside (a part not in a gas atmosphere) by some means, and this method will be described below.

In FIG. 6, 29 is wrapped in the upper case 2,
It is a mechanism room created between measuring chamber case 1 and 3.
0 is a controller chamber formed by the controller case 4 and the control lid 9, and 31 is a metering chamber enclosed by the metering chamber case 1 and the back side of the controller case 4. The metering chamber 31 has the metering membrane 11, and the mechanism chamber 29 has the aforementioned mechanism and the electromagnetic device 24. Also, control room 3
0 houses a control device 32 that sends a cutoff signal to the electromagnetic device 24 and detects and determines abnormal conditions. Mechanism chamber 2 is located at the top of measuring chamber case 1.
9 and the controller chamber 30, a through hole 33 is formed in the measuring chamber 31 as a communication path without an opening. An airtight terminal 34 is fixed to the end face on the side of the mechanism chamber 29, and an O-ring 35 prevents gas leakage. On the other hand, the through-hole opening 36 on the control chamber side is formed on the same surface as the measuring chamber sealing surface 37, and at the same time the measuring chamber 31 is hermetically sealed by the packing material 38, the through-hole 33 is also connected to the measuring chamber 31. An airtight seal is maintained. Reference numeral 39 is a hole provided at the bottom of the controller case 4 through which the electromagnetic device 2 can be inserted.
4 and the control device 32 have an airtight terminal 34, a through hole 33,
Electrical connection is made by passing an electric wire through the passage of the hole 39. Note that electric wires are not shown in FIG. 6 to avoid complicating the drawing. Actually, an electric wire is soldered to the airtight terminal 34 in advance, and the electric wire is pulled out from the mechanism chamber 29 side to the controller chamber 30 side through the through hole 33, and the airtight terminal 34 is fixed to the upper surface of the measuring chamber case 1. . Thereafter, the electromagnetic device 24 and the upper side of the hermetic terminal 24 are connected by soldering, and the other end of the electric wire is connected to the control device to complete the process. The airtight terminal 34 is, for example, a hermetically sealed metal pin.

As described above, the present invention adds a shutoff function to the gas meter itself, and not only can the same function be obtained without the need for a separate solenoid valve, but also allows the electronic device to be activated to control the gas flow rate. The control device that operates in the event of an abnormality, whether small or large, is integrated with the gas meter, so the installation work is no different from that of conventional gas meters. In particular, the control room that houses the control device is located below the indicator case and on the side of the meter room, so there is no increase in the projected area for installation when viewed from the front or in horizontal section. It does not pose a problem even when installed together with electricity or water meters, such as in meter boxes in apartment buildings. Further, since the controller chamber is configured at the above-described location, it is easy to form a communicating path for passing electric wires, and there is no need for exposed wiring. In this way, it is possible to obtain a dry gas meter that is easy to install, has no risk of wiring being cut by mischief, and is excellent in terms of reliability.

Note that the cutoff configuration shown in the figure is an example, and the present invention has a means for stopping gas supply in a gas atmosphere, and a current is supplied to an electromagnetic device that is the operation source through a communication path and an airtight terminal. It can be applied as long as it is a configuration in which it is supplied.

[Brief explanation of drawings]

Fig. 1 is a top view of a gas meter showing an embodiment of the present invention, Fig. 2 is a front view of the gas meter, Fig. 3 is a left side view of the gas meter, and Fig. 4 is an upper case and controller of the gas meter. FIG. 5 is a top view with the case removed, FIG. 5 is a front view of the same state, and FIG. 6 is a partial sectional view showing a part of the cross section taken along line A-A shown in FIGS. 4 and 5. . 3... Indicator case, 11... Measuring membrane, 13,
13'... wing shaft, 14, 14'... large elbow metal, 15,
15'...Small elbow metal, 16...1st crank plate, 1
7... Second crank plate, 17'... Engaging portion, 22
... Locking piece, 23 ... Permanent magnet, 24 ... Electromagnetic device, 32 ... Control device, 31 ... Measuring chamber, 30 ...
...Controller room, 29...Mechanism room, 33...Through hole,
34...Airtight terminal, 36...Through-hole opening on the control chamber side, 37...Measuring chamber sealing surface, 38...Packing material.

Claims (1)

[Scope of Claims] 1. A measuring chamber housing a measuring means for measuring the gas flow rate, a transmission mechanism provided at the upper part of the measuring chamber for transmitting the operation of the measuring means to an indicating means, and a means for stopping the flow of gas. a mechanism chamber housing an electromagnetic device for operating the electromagnetic device; an indicator case protruding from one side of the mechanism room and housing the indicating means; and an indicator case housing a control device for operating the electromagnetic device. a control chamber provided on a side surface of the measuring chamber below the control chamber; a communication passage communicating the mechanism chamber and the control chamber; and an airtight terminal provided in the mechanism chamber; A dry gas meter in which the control device and the electromagnetic device are electrically connected through a terminal. 2 The airtight terminal is provided in the through-hole opening on the mechanism chamber side, and the through-hole opening on the control chamber side is formed on the same surface as the measuring chamber sealing surface, and is airtightly sealed to the measuring chamber by a common packing material. A dry gas meter according to claim 1.