JPS5863812A - Dry type gas meter - Google Patents

Abstract

PURPOSE:To obtain a highly reliable dry type gas meter by providing the gas meter with an electromagnetic coil operating a detaining mechanism checking the rotational motion obtained by converting the reciprocating motion of a measuring film so as to be airtightly isolated from the body of the gas meter. CONSTITUTION:At a normal time, a permanent magnet 23 fitted to the other end of a detaining piece 22 is attracted by an electromagnetic device 24, so that the rotational motion of a crank board 17 based upon the reciprocating motion of a measuring film 11 is carried out without troubles because a pawl part 22' is located under the crank board 17 and gas is sent from a gas meter while being measured. If current having a polarity checking the attracting power of the permanent magnet 23 is supplied to an electromagnetic coil 26 even in a moment, the detaining piece 22 is rotated and a pawl 22' is projected up to the rotational height of the crank board 17 and abutted to an engaging part 17', so that rotation is stopped and the reciprocating motion of the measuring film 11 is also stopped to interrupt gas feeding. Since the electromagnetic device 24 and other equipment are accomodated in a mechanical room 29 covered with a case, a highly reliable dry type gas meter provided with an interrupting function is obtained.

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 to an electrical connection configuration to an electromagnetic device that performs a cutoff operation.

An abnormality has occurred for some reason in the indoor gas piping at home 1-
1. When it was necessary to urgently and automatically cut off the gas supply, conventionally a solenoid valve was inserted into the original piping section and a closing operation was performed in response to a cutoff signal.

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. Also, 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. there were.

The present invention is an attempt to solve the above-mentioned drawbacks, and is characterized by a structure in which a shutoff function is built into the gas meter, and a control device is also attached to the gas meter body so that the cable wires are not exposed to the outside. That is, a locking mechanism that blocks the movement of a transmission mechanism that converts the reciprocating motion of the printing film into rotational motion and transmits it to the indicating mechanism, an electromagnetic device that operates this locking mechanism, and a control device that sends signals to the electromagnetic device. The depletion chamber containing the metering membrane is hermetically sealed by the control chamber that houses the control device.
A through hole is formed that communicates the control room with the mechanism chamber housing the transmission mechanism, locking mechanism, and electromagnetic device, and one end of the hole is hermetically sealed with an airtight terminal, and the electromagnetic device and the control device are connected through the through hole and the airtight terminal. It 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 is shown in FIGS. 1 to 3. Controller case 4 and abdominal plate 5 located before and after 1
The external shape is formed by The upper case 2 has a gas population 6 and a gas outlet lower, and the indicator case 3 has a 1
, there is a display window 8 for reading the amount of gas used. A control lid 9 prevents rainwater from entering the front surface 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 and groan.

Although the operating principle and mechanism as a dry gas meter are the same as those of the prior art, they will not be described in detail, but an example with a built-in shutoff function will be described below with reference to FIGS. 4 and 5.

The reciprocating motion of the metering membrane 11 is caused by the blade shaft 13 via the vane plate 12.
13', the large elbow 14.14' and the small elbow 15.
15', first crank rotation 16, second crank rotation 1'': is converted into a rotational motion.

This movement is carried out by connecting plates 18, 18' to the pulp 19,
19', and this pulp 19°19' continues its rotational motion by appropriately applying gas to the metering membrane 11 and another metering membrane 11', not shown. There is. Rotational movement is done by gearbox 2o
is decelerated and transmitted to the output shaft 21. This output shaft 21
The rotation of the indicator is transmitted to the indicator mechanism in the indicator case 3 to display the amount of gas consumed, but since this part is a well-known structure, the explanation will be omitted.

Now, the shutoff operation will be explained next. The second crank plate 17 has an engaging portion 17' that protrudes outward from the gear box 20 and rotates, while a claw portion 22' of a locking piece 22 pivotally supported by the output shaft 21 is connected to the second crank plate 17. It is located within the rotational movement range of the 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, so that the claw portion 22' as shown in FIG. 1, it is located below the second crank plate 17. Therefore, the gas is metered and delivered from the gas meter without being affected by rotational movement. Next, when a current with a polarity that cancels the attraction force of the permanent magnet 23 is supplied to the electromagnetic device 24 even for a moment, the locking piece 221
1S1: Since it rotates counterclockwise in Fig. 5, the claw 2
2' protrudes from the second crank plate 170 at a rotational height of 1, and rotation is prevented by 1 with the retaining portion 17' and pawl 22' in contact with each other.

When the rotation is interrupted, the switching operation of the pulp 19.19' is stopped, the reciprocating movement of the dividing membrane 11.11' is also stopped, and the gas supply can be cut off. Relationship + I = - piece 6. 22 is designed so that in its natural state, the left side in Fig. 6 is heavier and rotates in the anti-chronological direction, and if the attractive force of the permanent magnet 23 is appropriately selected, the current value and required energization time for interrupting can be minimized. can. 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 cam 2
5, the cam 26 is in contact with the top of the cam shaft 26.
5, the engaging piece 1E is rotated clockwise, and the pawl 22' and the retaining part 1 are finally rotated.
7' is released from the locked state, and is attracted to the electromagnetic device 24 by the force of the permanent magnet 23. 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 transmits only rotational force, such as a universal joint, is suitable here.

Wing shaft 13.13 converting the motion of the metering membrane 11 into rotational motion
', large and small elbows 14, 14', 15.

15', a transmission mechanism composed of two crank plates 16 and 17, and an engaging portion 17' of the second crank plate 17.
A locking mechanism consisting of a locking piece 22 and a locking mechanism 22, and an electromagnetic device 24 are provided in a mechanism chamber 29 which is stacked several times in the case 2, where Ll is filled with gas. It is connected to gas population 6. In order to supply current to the electromagnetic device 24, it is necessary to connect an electric wire from the outside (a part that is not in a gas atmosphere) by some means, and this method will be described below.

In FIG. 6, 29 is a mechanism chamber enclosed by the upper case 2 and formed between the dividing chamber case 1, and 3° is a controller chamber formed by the controller case 4 and the control lid 9. Yes, 3
Reference numeral 1 denotes a weighing chamber which is stacked on the back of the weighing chamber case 1 and 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. Further, the controller room 30 houses a control device 32 that sends a cutoff signal to the electromagnetic load 24 and detects and determines abnormal conditions. The upper part of the weighing chamber case 1 connects the mechanism chamber 29 and the controller chamber 30, and the weighing chamber 31 has a through hole 3 having no opening.
3 is formed. An airtight terminal 34 is fixed to the end face on the side of the mechanism chamber 29, and the QIJ song 5 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 seal 37, and at the same time the measuring chamber 31 is hermetically sealed by the packing material 38, the through-hole 33 is also sealed against the measuring chamber 31. An airtight seal is maintained. 39 is a hole provided at the bottom of the controller case 4, and the electromagnetic device 24 and the control device 32 are connected to the airtight terminal 34,
Electrical connection is established by passing electric wires through the passages of the through holes 33 and 39. Note that electric wires are not shown in FIG. 6 to avoid complicating the drawing. Actually, the airtight terminal 3
Solder the wire to the through hole 33 in advance and insert the wire into the through hole 33.
through the mechanism chamber 29 side to the controller chamber 3o side,
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. Airtight terminal 34 (l-1: For example, a hermetically sealed metal bottle is used.

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 a shutoff signal can be sent to the electromagnetic device. The sending control device is also integrated, and by sharing the airtight seal part, the configuration can be simplified and the exposed part of the electric wire can be eliminated.

As a result, it is possible to obtain a dry gas meter that is easy to install and has a highly reliable shutoff function since there is no risk of disconnection after installation.

Note that the shutoff configuration shown in the figure is just an example, and the present invention relates to a mechanism that stops gas supply by restraining the movement of an actuating part in a gas atmosphere, with respect to an electromagnetic device that is the source of its operation. It is applicable to all configurations in which current is supplied through airtight terminals and through holes.

[Brief explanation of the drawing]

FIG. 1 shows 10 parts of a gas meter showing one embodiment of the present invention.
. Figure 5 is a front view of the same state, and Figure 6 is a cross section taken along line A-A shown in Figures 4 and 5. FIG. 11...,...Metric membrane, 13.13'...
・Wing axis, 1414' ... dog elbow metal, 15.1
5'...Small elbow metal, 16-...1st crank plate, 17...2nd crank plate, 17'
......Engaging portion, 22......Locking piece, 2
3...--Permanent magnet, 24...-Electromagnetic device,
32...control device, 31...depression 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. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure 4 ()□...

Claims (2)

[Claims] (1) A transmission mechanism that converts the reciprocating motion of the metering membrane into rotational motion and transmits it to the indicating mechanism, a locking mechanism that stops the movement of this transmission mechanism, an electromagnetic device that operates this locking mechanism, and this electromagnetic device. A control device for operating the device, a front surface of a metering chamber housing the metering membrane hermetically sealed, and a controller chamber housing the control device, a mechanism chamber housing the transmission mechanism, and the controller chamber communicate with each other. A dry gas meter comprising a through hole and an airtight terminal provided at one end of the through hole, the control device and the electromagnetic device being electrically connected through the through hole and the airtight terminal. (2) The airtight terminal is provided at the through-hole opening on the mechanism chamber side,
The dry gas meter according to claim 1, wherein the through-hole opening on the control chamber side is formed on the same surface as the measuring chamber sealing surface and made of a common packing material, and is hermetically sealed to the measuring chamber. .