JPS6120498Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a dry gas meter in which the flow of gas passing through the meter can be shut off by an external operation.

In indoor gas piping, if you want to urgently shut off the gas for some reason, the conventional method is to
Generally, the main valve installed on the inlet side of the gas meter is turned off, but in order to stop the main valve in conjunction with a shut-off signal from a gas leak detector or earthquake sensor, a solenoid valve is used as the main valve. There is a need. However, solenoid valves are expensive, and it takes a lot of effort to install them in the middle of piping, and especially in the case of existing customers (piping), there may be problems with the installation location.

The present invention has been proposed in view of the above points.
The purpose is to propose a dry gas meter that can shut off gas without installing an emergency shutoff valve such as a solenoid valve in the piping system.

The configuration of the present invention will be described in detail below.

In a dry gas meter in which the reciprocating motion of the metering membrane is converted into rotational motion by a crank mechanism and the amount of gas used is displayed with a pointer, when there is no load within the rotation radius of the crank arm, the claw rotates under its own weight and the claw is attached to the crank arm. A stopper that protrudes within the rotational radius of the stopper is rotatably attached using a shaft, and a push-up part is formed at the tip to contact the engaging part formed at the rear end of the stopper from below, and a drive part is formed at the rear end. A drive arm is provided which is rotatable by a shaft and is attached so that the pushing part side is always raised by a spring, contacts the drive part of the drive arm from the inside, and rotates the drive arm by pushing the drive part by the spring, An extrusion arm is provided to lower the push-up part of the drive arm, and a permanent magnet is attached to the rear end of the support shaft of the extrusion arm, and this permanent magnet is attracted to the iron core of the electromagnet, and when the electromagnet is energized, the magnetic field of this electromagnet and the permanent The dry gas meter is configured so that the magnetic fields of the magnets cancel each other out, and when the magnetic fields cancel each other out, the permanent magnet separates from the iron core and the push-out arm moves forward with a spring to push the drive part of the drive arm.

As mentioned above, in a dry gas meter, if the crank arm, which is the rotating part, is stopped by the stopper, not only the metering membrane will move, but the valve will also be closed, so the gas will be stopped within the meter, and the meter will stop moving. flow from the outlet to the downstream piping system.

Embodiment FIG. 1 shows a cross section of a dry gas meter implementing the above-mentioned invention, and FIG. 2 shows the main part of the invention.
In the figure, 1 is the gas meter body, 2 and 2' are the metering membranes built into the metering chambers 3 and 3' in this body, 4 is the gas inlet, 5 is the gas outlet, and 6 and 6' are the metering chambers 3 and 3. 7, 7' are wing shafts for transmitting the membrane motion of the metering membranes 2, 2' to the large elbows 8, 8', 9, 9' are small elbows. For gold, this large elbow gold 8,8', small elbow gold 9,9',
The crank arm 10 converts membrane motion (reciprocating motion) into rotational motion. 11 is a crank for converting rotational motion into opening/closing motion of the valves 6, 6'; 12 is a metering mechanism (pointer) that decelerates the rotational motion;
This is a worm gear for transmitting information to the

In FIG. 2, the crank arm 10 is connected to the shaft 13.
It has a flat plate shape that rotates clockwise in the figure around , with an engaging piece 10' protruding from a portion.
Reference numeral 14 designates a reversal prevention pawl for preventing the crank arm 10 from reversing; 15 designates a drive arm rotatably attached to the shaft 16; this drive arm 15 includes a stopper pusher portion 15';' and a drive part 15'' formed on the opposite side, and is biased by a spring 17 to rotate to the left in FIG.
The engaging part 18' engages with the push-up part 15' of No. 5, and the shaft 19
The stopper 18 is formed by forming a claw 18'' on the opposite side of the engaging portion 1.
It is supported by a shaft 19 so that the 8' side is heavier, and the pushing part 15' of the drive arm 15 is connected to the engaging part 1.
8', and prevents the stopper 18 from rotating to the left in FIG.

20 is a driver, and the permanent magnet 20' of this driver 20 is fixed to the support shaft of the extrusion arm, overcomes the spring 21 and is attracted to the iron core 20'' of the electromagnet. When the one-shot current flows to the electromagnet side, the permanent magnet 20'
A magnetic field is generated that cancels the magnetic field of the permanent magnet 20'.
is separated from the iron core 20''. As a result, the force of the return spring 21 causes the push-out arm 23 to move away from the drive arm 15.
2, and the drive arm 15 is rotated to the right in FIG. 2 against the spring 17.

The present invention is constructed as described above, and in a normal state, the claw 18'' of the stopper 18 escapes from the crank arm 10, as shown by the solid line in FIG. 4, and the crank arm 10 freely rotates to continue metering. When a one-shot current flows through the electromagnet of the driver 20 (for example, due to a cutoff signal from a gas leak detector), the magnetic field of the permanent magnet 20' is canceled and the permanent magnet 20' separates from the iron core 20''. As a result, the push arm 23 is moved by the spring 21 to the driving arm 1.
5 and rotates the drive arm 15 clockwise as shown by the dashed line. When the drive arm 15 rotates clockwise, the engagement section 18' of the stopper 18 is no longer supported, so the stopper 18 is not engaged. The weight of the portion 18' causes the crank arm to rotate counterclockwise as shown by the dashed line in FIG. 4, and the claw 18'' of the stopper 18 projects into the rotation range of the crank arm 10. As a result, the engagement piece 10' of the crank arm 10 engages with the pawl 18'' and its rotation is stopped. When the rotation of the crank arm 10 is stopped, the membrane movement is stopped via the interlocking mechanism and the valve is closed. When metering stops, the gas also stops.

Next, in order to reset the system once it has been activated, the reset lever 25 shown in FIG. 2 is rotated to the left. When the reset lever 25 is rotated to the left, the reset pawl 26 rotates the drive arm 15 to the left to the position shown by the solid line in FIG. As a result, the crank arm 10 is free to rotate forward, metering is restarted, and gas begins to flow.

As described above, this invention forcibly locks the internal operating part of a dry gas meter.
Since metering is stopped, the flow of gas can be shut off within the gas meter in the same way as a solenoid valve.

Therefore, if a gas meter with such a function is used, there is no need to install a solenoid valve for emergency shutoff in the piping, and it is possible to reduce costs when installing an emergency gas shutoff device, and to save money on existing customers. It can be easily integrated into a gas meter even if the gas meter is installed, and there are no installation restrictions.

Secondly, since the present invention only locks the operating part within the gas meter to shut off the gas, the mechanism is simple, there is no risk of failure, and the reliability of the shutoff mechanism is high.

In addition, since this invention adopts a method of operation using permanent magnets and electromagnets, locking operation can be performed with a single shot current, and the service life can be dramatically increased when using dry batteries. .

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a dry gas meter in which the present invention is implemented, Fig. 2 is a perspective view of the main parts showing the present invention,
FIG. 3 is a plan view, FIG. 4 is a side view, and FIG. 5 is a perspective view of the drive arm. 1...Gas meter, 2,2'...Measuring membrane,
6, 6'...Valve, 10...Crank arm,
15... Drive arm, 18... Stopper, 20
...Driver, 25...Reset lever.

Claims (1)

[Scope of utility model registration request] In a dry gas meter in which the reciprocating motion of the metering membrane is converted into rotational motion by a crank mechanism and the amount of gas used is displayed with a pointer, when there is no load within the rotation radius of the crank arm, the claw rotates under its own weight and the claw is attached to the crank arm. A stopper that protrudes within the rotational radius of the stopper is rotatably attached using a shaft, and a push-up part is formed at the tip to contact the engaging part formed at the rear end of the stopper from below, and a drive part is formed at the rear end. A drive arm is provided which is rotatable by a shaft and is attached so that the pushing part side is always raised by a spring, contacts the drive part of the drive arm from the inside, and rotates the drive arm by pushing the drive part by the spring, An extrusion arm is provided to lower the push-up part of the drive arm, and a permanent magnet is attached to the rear end of the support shaft of the extrusion arm, and this permanent magnet is attracted to the iron core of the electromagnet, and when the electromagnet is energized, the magnetic field of this electromagnet and the permanent The dry gas meter is configured so that the magnetic fields of the magnets cancel each other out, and when the magnetic fields cancel each other out, the permanent magnet separates from the iron core and the push-out arm moves forward with a spring to push the drive part of the drive arm.