JPH0245581Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> This invention relates to a valve open/close display mechanism for a gas meter with a built-in shutoff valve.

<Prior Art> The present applicant has previously assembled a solenoid-type shutoff valve into a gas meter to detect a reduced pressure state of gas supplied to the gas meter's housing wag, and to use it for other purposes such as gas leak detectors and earthquake sensors. We have developed a mechanism that operates a shutoff valve in conjunction with the output of a device.

The advantage of this structure is that the gas can be shut off at the gas source.

This type of shutoff valve is equipped with a return device.
Each time the gas is released, the device is operated to push back the valve body of the shutoff valve, thereby releasing the gas.

《Problem that the invention aims to solve》 However, since this return device is provided solely for the purpose of return, the front of the operating part is usually covered with a blind screw, so if you are unfamiliar with it, it may be difficult to use. If it is unclear which part to operate, or if the piping is complicated, it takes time to determine whether the gas meter is shutting off or another part. Also, it was not possible to judge whether the gas had returned until the gas was actually flowing.

This invention is intended to solve the above problems, and aims to eliminate the above disadvantages by simply adding a simple display function to this type of return mechanism.

<<Means for solving the problem>> In order to achieve the above-mentioned object, this invention provides a shutoff valve that is located in the flow path on the gas inlet side and opens and closes the flow path, and an operation of the valve body of the shutoff valve. The gas meter is characterized by having a cam interlocked with the gas meter, and a return operation knob that displays the rotation of the cam shaft of the cam on the front of the gas meter.

《Operation》 By turning the operating knob, it is possible to visually check from the outside whether it is actually shut off or restored.

<<Example>> Hereinafter, an example of this invention will be described in detail using the drawings.

FIG. 1 is a partially cutaway front view of a gas meter according to this invention, FIG. 2 is a side sectional view of the same essential part, and FIG. 3 is a front explanatory view showing the display portion.

In the figure, gas meter GM is upper case 1.
The lower case 2 is airtightly connected via flanges 1a and 2a.

The upper case 1 is provided with a gas inlet port 3 and an outlet port 4, and the gas introduced from the inlet port 3 enters the lower case 2 from the upper case 1 and passes through a meter-driven meter built in the lower case 2. A membrane plate (not shown) for this purpose is expanded and contracted, and then the liquid is supplied to the end device from the outlet port 4 via the upper case 1 again.

Then, the expansion and contraction force of this membrane plate is taken out via the power transmission mechanism 5 disposed inside the upper case 1,
A display board 6 provided on the front surface of the upper case 1 displays an integrated amount of gas consumption.

A nozzle 7 is arranged at the bottom of the inlet port 3.

A solenoid type cutoff valve 8 is arranged on the gas downstream side of the nozzle 7, and a cam 9 is arranged inside the nozzle 7.

The shutoff valve 8 includes a solenoid 81 that is airtightly fixed inside the upper case 1, and a solenoid 81 that is airtightly fixed inside the upper case 1.
It consists of a valve body 82 that protrudes from the upper end of the valve body 82, and a spring 83 that always biases the valve body 82 in the protruding direction.

The solenoid 81 is linked to a gas leak detector, a seismic sensor, etc., and is activated by the detection output of one or more of these. The valve body 82 is airtightly housed in a sealed case 84 fixed to the portion 71 via screws B, and the valve body 82 is positioned in a lowered position against the biasing force of a spring 83.

The cam 9 is pivotally supported by the inner protruding end of the nozzle 7 of a valve return rod 91 which passes through the inside and outside of the upper housing 1 back and forth and is airtightly and rotatably supported by a bearing.

An externally protruding end of the return rod 91 protrudes toward the surface of the display panel 6 provided on the front surface of the upper case 1.

A knob 93 for return operation that also serves as a display is integrated into this externally projecting end.

Also, on the inside of the display board 6, the knob 93
A tension coil spring 95 is suspended between one side and a post 94 protruding from the upper case 1, and constantly urges the return rod 91 to rotate clockwise.

Due to this rotational displacement, the cam 9 always moves to the valve body 8.
It is in contact with 2.

The periphery of the protruding end of the knob 93 from the display panel 6 is covered with a screw-in transparent protective cap 10.

Around the protective cap 10 are "closed",
Open/close display marks 11 indicated by "open" and "arrow" are engraved at predetermined positions.

On the other hand, an index 12 is engraved on the end face of the knob 93.

The figure shows the shutoff valve 8 in a non-operating state, with the valve body 82 in the lowered position.

In the lowered position, the indicator 12 indicates "open".

When a cutoff pulse is output to the solenoid 81 from this state, the valve body 82 is raised by the biasing force of the spring 83, and when the cam 9 rotates following this, the return rod 91 and the knob 93 move counterclockwise. As a result, the indicator 12 indicates the "closed" position.

Therefore, depending on the position of this indicator 12, it is possible to visually confirm whether the shutoff valve 8 is in operation or not.

To return from the valve closed state, the cap 1
0 and turn the knob 93 clockwise in the direction of the arrow, the valve body 82 will descend and open the nozzle 7.
is opened and held in that state by the solenoid 81.

The reference numeral 14 in FIG. 2 is a terminal plate airtightly fixed to the front surface of the upper case 1, and the terminal 1 provided on this terminal plate
The solenoid 81 is connected to the external lead wire 15 through 4a.

<<Effects of the invention>> As explained above, according to this invention, the gas can be shut off at the gas source in an emergency. Further, by turning the operating knob, it is possible to visually confirm whether the gas is actually shut off or restored at a glance from the outside, and the gas shut off position can be immediately identified.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of a gas meter according to this invention, FIG. 2 is a side sectional view of the same essential part, and FIG. 3 is a front explanatory view showing the display portion. GM...Gas meter, 1...Upper case, 2...
Lower case, 3...Gas inlet port, 4...Outlet port, 7...Nozzle, 8...Shutoff valve, 9...Cam, 11...Display mark, 12...Indicator, 82...
...Valve body, 91...Return rod.

Claims (1)

[Scope of utility model registration request] A shutoff valve located in the flow path on the gas inlet side that opens and closes the flow path, a cam that is linked to the operation of the valve body of the shutoff valve, and a return operation that displays the rotation of the camshaft of the cam on the front of the gas meter. A valve open/close display mechanism for a gas meter with a built-in shutoff valve, characterized by having a knob for use.