JP2651324B2 - Gas meter with built-in pressure sensor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas meter with a built-in pressure sensor, and more particularly to a gas meter with a built-in pressure sensor that can prevent an accident due to a decrease in gas pressure.

[0002]

2. Description of the Related Art A conventional gas meter having a built-in pressure sensor has a function of closing a shut-off valve built in the gas meter and reporting an abnormality in the supply equipment when the supply pressure is significantly reduced. FIG. 4 shows a configuration of a general gas supply facility. In FIG. 4, the pressure of the gas supplied from the cylinder 1 is adjusted by the adjuster 2 and sent to the gas meter 3.
The gas measured by the gas meter 3 is supplied to a combustor 4.

[0003]

However, the combustor 4
Is large or the number is large, the supply capacity of the cylinder 1, the regulator 2, and the gas meter 3 may be insufficient, and the supply pressure may decrease. In this case, the combustor 4 is incompletely burned, and in the worst case, there is a risk of causing an accident. Also, when there is a supply equipment defect such as an incompatibility with the regulator 2 or piping,
Similarly, there was a possibility that the supply pressure was reduced and a similar accident occurred.

The present invention has been made in view of the above problems, and has as its object to provide a gas meter with a built-in pressure sensor that can detect whether gas supply capacity is insufficient or supply equipment is defective and issue an alarm to ensure safety. And

[0005]

According to a first aspect of the present invention, there is provided a gas meter having a built-in pressure sensor, wherein the gas pressure in the gas meter detected by the pressure sensor is a predetermined value. A determining means for determining that the pressure has become equal to or less than a pressure; and a comparing means for comparing a gas passing flow rate passing through the gas meter with an allowable passing flow rate of the gas meter. When the determination is made, an alarm generating means for issuing a gas supply capacity shortage signal when the gas passage flow rate is larger than the allowable passage flow rate and issuing a gas supply equipment failure signal when the gas passage flow rate is smaller than the allowable passage flow rate is provided. It is characterized by:

According to a second aspect of the present invention, there is provided a transmitting means for transmitting a signal generated by the alarm generating means to a predetermined portion.

[0007]

According to the above construction, when it is determined that the gas pressure in the gas meter has become equal to or lower than a predetermined pressure, the gas passage flow rate is compared with the allowable passage flow rate, so that the decrease in the gas pressure can be prevented. You can know whether it is due to insufficient capacity or defective supply equipment. Therefore, safety can be ensured by taking an early action based on this warning.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a gas meter with a built-in pressure sensor according to the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of an embodiment of the present invention.
In FIG. 1, portions corresponding to those of the conventional example shown in FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted as appropriate. The feature of this embodiment is that a judgment means 12 for judging that a detection value of a pressure sensor 11 built in the gas meter 3 has become equal to or lower than a predetermined pressure value, a gas passing flow rate passing through the gas meter 3 and a predetermined allowable passing flow rate. Means 1 for comparing with
3, a warning generating means 14, and a transmitting means 15 for transmitting a signal generated by the warning generating means 14 to a gas company or the like.

Next, the operation of this embodiment will be described with reference to FIG. In step 101, measurement by the gas meter 3 is started. In step 102, when gas flows in the gas meter 3, in step 103, the gas pressure is measured by the pressure sensor 11. Then step 1
When the determining means 12 determines that the gas pressure has become equal to or lower than the predetermined pressure in 04, in step 105, the comparing means 13 compares the gas passing flow rate with the allowable passing flow rate. If the passing flow rate is equal to or more than the allowable flow rate, in step 106, the alarm generation means 14 issues a supply capacity shortage warning signal. If the passing flow rate is equal to or less than the allowable flow rate, in step 107, the alarm generating means 14 issues a supply equipment failure warning signal. These signals are transmitted to the gas company or the like by the transmission means 15, and safety can be ensured by taking early action. Then, in step 108, the process is completed.

FIG. 3 shows the characteristic of the gas pressure adjustment value of the typical regulator 2, which is adjusted so as to have a gas pressure of about 230 mm H ₂ O within a predetermined flow rate range. In this case, the determination means 12
Is about 200 mm H ₂ O. The allowable flow rate of the gas meter 11 is set to about 80% of the maximum flow rate of the meter.

According to this embodiment, when the gas pressure in the gas meter 3 drops below a predetermined value, the cause is whether the gas supply capacity is insufficient due to the combustor 4 being too large or the like.
It is possible to determine whether or not the supply equipment is defective due to a controller failure, piping incompatibility, or the like.

[0013]

As described above, according to the gas meter with a built-in pressure sensor of the present invention, when the gas pressure in the meter decreases, it is determined whether the cause is due to insufficient gas supply capacity or a defective supply facility. Can be determined,
You can deal with it early and ensure safety.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of gas supply equipment using an embodiment of a gas meter with a built-in pressure sensor of the present invention.

FIG. 2 is a flowchart illustrating the operation of one embodiment of the present invention.

FIG. 3 is a diagram showing characteristics of the regulator of FIG. 1;

FIG. 4 is a block diagram showing a configuration of an example of a conventional gas supply facility.

[Explanation of symbols]

 Reference Signs List 3 gas meter 11 pressure sensor 12 discriminating means 13 comparing means 14 alarm generating means 15 transmitting means

Claims (2)

(57) [Claims] In a gas meter having a built-in pressure sensor, a determination means for determining that a gas pressure in the gas meter detected by the pressure sensor has become equal to or less than a predetermined pressure, and a gas passage flow rate passing through the gas meter. And a comparing means for comparing with an allowable passage flow rate of the gas meter,
When the determination means determines that the pressure has become equal to or less than the predetermined pressure, a gas supply capacity shortage signal is issued when the gas passage flow rate is larger than the allowable passage flow rate. A gas meter with a built-in pressure sensor, comprising an alarm generating means for generating a supply equipment failure signal. 2. The gas meter with a built-in pressure sensor according to claim 1, further comprising transmitting means for transmitting a signal generated by said alarm transmitting means to a predetermined portion.