KR102046035B1 - Apparatus for diagnosing fault of gas meter and gas meter using the same - Google Patents

Abstract

According to an embodiment of the present invention, an apparatus for diagnosing a fault of a gas meter comprises: an inlet unit provided with an inlet port into which gas flows and an inlet passage connected to the inlet port; and an outlet unit provided with an outlet port through which gas is discharged and an outlet passage connected to the outlet port. The apparatus comprises a differential pressure detector connected between a first through hole formed in the inlet unit to be connected to the inlet passage and a second through hole formed in the outlet unit to be connected to the outlet passage to detect differential pressure with respect to gas pressure around the inlet passage and the outlet passage. Moreover, through a differential pressure result detected in the differential pressure detector, a fault of a gas meter can be diagnosed.

Description

Apparatus for diagnosing fault of gas meter and gas meter using the same}

The present invention relates to an apparatus for diagnosing a gas meter and a gas meter using the same, and more particularly, to an apparatus and method for diagnosing a gas meter failure through differential pressure detection, and a gas meter using the same.

A combustor is a device that generates heat energy by burning city gas (hereinafter, referred to as "gas"). For example, a combustor includes a boiler, a hot and cold water heater, an air conditioner, a generator, a heating furnace, a heat treatment furnace, and the like. For normal use of the combustor, appropriate specifications for the supply pressure and capacity of the gas have been established, and the appropriate use depends on the type, make and model of the combustor. That is, the combustor is installed and operated together with the gas pipe and the pressure regulator (or constant pressure) according to its proper specification.

On the other hand, the gas meter is a device for measuring the gas usage, it is installed with the above-described devices for charging the gas usage. Gas meters installed in this way may be disturbed if they are used for a long time or if they are affected by environmental factors.

For example, the type of failure of a gas meter is the first type, in which gas cannot pass through by a foreign substance or only a small amount, and gas cannot pass or only a small amount due to deformation due to torsion (stress) of the pipe. The second type, gas passes through smoothly but the metering limit of the gas meter is reduced due to excessive pressure due to a third type, foreign matter or constant pressure failure which results in less metering due to breakage of the weighing component due to excessive pressure due to foreign matter or static pressure in the piping. There is a fourth type which cannot be weighed according to the excess.

At this time, such as the first type and the second type, the type that the gas does not pass or only a small amount can be easily understood through the metering value of the gas meter or the operation of the combustor is stopped.

On the other hand, there is a problem that the type of gas supplied but less metered or impossible to meter is not easily identified, such as the third type and the fourth type. In other words, this type of gas meter failure can be identified only by the occurrence of defects in the process using the combustor, the usage of the unit per month, the analysis of the gas usage compared to the operation rate / production rate, and in the worst case, months or years later. Fertilization may also occur for gas usage.

However, conventionally, a device for diagnosing a failure of such a gas meter is not separately implemented. Alternatively, even if a fault diagnosis device is implemented, the fault diagnosis device should be additionally installed in the gas meter or the surrounding equipment which has already been installed, and this operation is practically limited. In other words, in order to install the fault diagnosis device in the existing gas meter or its surrounding equipment, the gas supply must be stopped first, and then the existing work such as drilling and welding of the gas pipe connected to the gas meter is performed. Should be. In addition, modifications to these existing installations are expensive and time consuming.

In order to solve the conventional problems as described above, the present invention can easily diagnose the failure of the gas meter and at the same time the failure diagnosis apparatus for a gas meter that can minimize the change of the gas meter or its peripheral equipment at the same time and the installation The purpose is to provide a used gas meter.

However, the problem to be solved by the present invention is not limited to the above-mentioned problem, another task that is not mentioned will be clearly understood by those skilled in the art from the following description.

Disability diagnosis apparatus for a gas meter according to an embodiment of the present invention for solving the above problems is provided in the inlet having an inlet and inlet connected to the inlet and the inlet through which the gas is introduced, the outlet and the outlet through which the gas is discharged An apparatus for diagnosing a failure of a gas meter including a discharge part having a discharge passage connected to each other, the apparatus comprising: a first through hole formed in an inlet portion to be connected to an inlet passage and a second through hole formed in the discharge portion to be connected to the discharge passage; It is connected between the differential pressure detector for detecting the pressure difference between the gas pressure around the inlet passage and the gas pressure around the discharge passage, and through the differential pressure results detected by the differential pressure detector it is possible to diagnose the failure of the gas meter.

The fault diagnosis apparatus for a gas meter according to an embodiment of the present invention includes (1) a first tube and a second tube connected to each other, and a third tube connected therebetween, respectively, wherein the first tube passes through the first tube. The first insertion pipe inserted into the hole, (2) the gas pressure gauge connected to the second pipe, (3) one end is located outside the gas meter, the other end inserted into the second through hole is connected to the outlet It may further include a second insertion tube having a length enough to be located inside the discharge pipe, the differential pressure detector may be connected between the end of the third tube and one end of the second insertion tube. Accordingly, the fault diagnosis apparatus for a gas meter according to an embodiment of the present invention may diagnose a fault on the gas meter through a value of a gas pressure gauge and a differential pressure result detected by the differential pressure detector.

The second insertion pipe may have a length such that the other end thereof is positioned at a distance of two or more times the inner diameter of the discharge pipe in the discharge pipe.

The differential pressure detector is (1) a transparent bent tube having a bent portion of a bent shape, (2) a first gas pressure acting on an end of the first tube and the other end of the second insertion tube which is provided inside the bent tube. The position of the bent portion may be changed according to the second gas pressure acting on the liquid crystal, thereby including a colored differential pressure display liquid displaying the differential pressure.

The bent portion may be bent in a downward direction at a position lower than an end of the third tube and one end of the second insertion tube.

The differential pressure indicating liquid may be formed of a lubricating oil component.

The bent tube may further include a first inclined tube and a second inclined tube connected to the bent portion, and the differential pressure indicating liquid may be added to the first inclined tube and the second inclined tube according to the first gas pressure and the second gas pressure. The height filled can change.

The first inclined tube and the second inclined tube may have different inclinations.

The differential pressure detector may include a scale for displaying a height of the differential pressure display liquid filled around the first inclined tube, the second inclined tube, or any one or more thereof.

The scale may be a reference scale that is a reference for whether a failure of the gas meter occurs.

The differential pressure detector may further include a replenishment port capable of replenishing the differential pressure indicating liquid into the bent tube.

Gas meter according to an embodiment of the present invention, (1) an inlet having a gas inlet and an inlet passage connected to the inlet, (2) a gas outlet and a discharge passage connected to the outlet (3) between the first through hole formed in the inlet to be connected to the inlet passage and the second through hole formed in the outlet to be connected to the outlet passage, the gas pressure around the inlet passage and the gas around the outlet passage It includes a differential pressure detector for detecting the differential pressure against the pressure, it is possible to diagnose the failure of the gas meter through the differential pressure results detected by the differential pressure detector.

Disability diagnosis apparatus for a gas meter and a gas meter using the same according to an embodiment of the present invention configured as described above by using a differential pressure detection method through the first through hole and the second through hole pre-formed or arbitrarily formed in the gas meter In addition, it is possible to more easily diagnose gas meter failures and to minimize changes to the gas meter or its surroundings during installation.

1 shows a block diagram of a gas meter 1 and a failure diagnosis apparatus 10 for a gas meter according to an embodiment of the present invention.
2 shows a side view of a gas meter 1 and a failure diagnosis apparatus 10 for a gas meter according to an embodiment of the present invention.
3 shows an internal plan view of the gas meter 1 and the failure diagnosis apparatus 10 for a gas meter according to an embodiment of the present invention.

The above objects, means, and effects thereof will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, and as a result, those skilled in the art to which the present invention pertains may easily facilitate the technical idea of the present invention. It can be done. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular forms also include the plural forms as the case otherwise indicates. In this specification, terms such as "comprise", "include", "presume" or "have" do not exclude the presence or addition of one or more components other than the mentioned components.

In this specification, terms such as “or”, “at least one”, etc. may refer to one of the words listed together, or may represent a combination of two or more. For example, "or B" "and at least one of B" may include only one of A or B, and may include both A and B.

In this specification, descriptions that follow “for example”, etc., may not exactly match the information presented, such as the recited characteristics, variables, or values, tolerances, measurement errors, limits of measurement accuracy, and other commonly known factors. It should not be limited to the embodiments of the invention according to various embodiments of the present invention in the same effect as the modification.

In the present specification, when a component is described as being 'connected' or 'connected' to another component, the component may be directly connected to or connected to the other component, but another component may be present in between. It should be understood that it may. On the other hand, when a component is said to be 'directly connected' or 'directly connected' to another component, it should be understood that there is no other component in between.

In the present specification, when a component is described as being 'on' or 'facing' another component, the component may be directly in contact with or connected to another component, but another component may be present in between. It should be understood that it can. On the other hand, if a component is said to be 'directly' or 'directly' to another component, it may be understood that there is no other component in between. Other expressions describing the relationship between the components, such as 'between' and 'directly between', may be interpreted as well.

In this specification, terms such as 'first' and 'second' may be used to describe various components, but the components should not be limited by the above terms. In addition, the above terms should not be construed as limiting the order of each component, but may be used for the purpose of distinguishing one component from another. For example, a 'first component' may be referred to as a 'second component', and similarly, the 'second component' may also be referred to as a 'first component'.

Unless otherwise defined, all terms used in the present specification may be used in a sense that can be commonly understood by those skilled in the art. In addition, terms that are defined in a commonly used dictionary are not ideally or excessively interpreted unless they are specifically defined clearly.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a block diagram of a gas meter 1 and a failure diagnosis apparatus 10 for a gas meter according to an embodiment of the present invention. 2 shows a side view of a gas meter 1 and a failure diagnosis apparatus 10 for a gas meter according to an embodiment of the present invention, and FIG. 3 shows the gas meter 1 and the present invention installed thereon. An internal plan view of the failure diagnosis apparatus 10 for a gas meter according to an embodiment is shown.

The failure diagnosis apparatus 10 for a gas meter according to an embodiment of the present invention is a device installed in the gas meter 1 to diagnose a failure of the gas meter 1 through differential pressure detection.

First, the gas meter 1 is a device for measuring gas consumption, and may include an inlet part 20, an outlet part 30, a metering part 40, and a display part 50, as shown in FIG. 3. have. In particular, the gas meter 1 may further include, as a component, a failure diagnosis apparatus 10 for a gas meter according to an embodiment of the present invention.

The inlet part 20 and the outlet part 30 are the components classified according to the position in the gas meter 1. That is, the inlet 20 is a configuration including a portion where gas is introduced from the gas meter 1, and the discharge portion 30 is a configuration including a portion from which the gas is discharged from the gas meter 1.

The inlet part 20 may include an inlet port 21 through which gas is introduced, and an inlet path 22 which is connected to the inlet port 21 and an inner passage for transporting the gas introduced into the inlet port 21. . At this time, the inlet 21 may be connected to the inlet pipe (IP) for carrying the inlet gas.

The inflow portion 20 may further include a first through hole 23 connected to the inflow passage 22. In this case, the first through hole 23 may be a hole penetrated from the outer surface of the inflow portion 20 to the inside of the inflow passage 22. However, the first through hole 23 is a hole previously formed in the gas meter 1 (for example, a pressure port for installing a gas temperature pressure compensator), or optionally drilled in the gas meter 1 for the application of the present invention. It may be a hall.

The discharge part 30 includes an outlet 31 through which gas is discharged, and an outlet passage 32 which is connected to the outlet 31 and is an internal passage for carrying gas to be discharged to the outlet 31. In this case, the inflow passage 22 and the discharge passage 32 may be connected to each other. In addition, the outlet 31 may be connected to the discharge pipe (OP) for carrying the discharged gas.

The discharge part 30 may further include a second through hole 33 connected to the discharge passage 32. In this case, the second through hole 33 may be a hole penetrated from the outer surface of the discharge part 30 to the inside of the discharge passage 32. However, the second through hole 33 is a hole previously formed in the gas meter 1 (for example, a temperature port for installing a gas temperature pressure compensator), or optionally drilled in the gas meter 1 for the application of the present invention. It may be a hall.

The metering unit 40 is configured to measure the flow rate of the gas introduced therein, and may be provided between the inlet 20 and the outlet 30. For example, the meter 40 may measure the flow rate of the gas according to the degree of rotation while the rotational movement is generated according to the flow rate of the gas, but is not limited thereto. That is, the rotating body of the metering unit 40 that rotates in accordance with the flow rate of the gas may be provided in the passage between the inlet passage 22 and the discharge passage 32.

The display unit 50 is configured to display the value measured by the metering unit 40 to the user. For example, the display unit 50 may be an analog method including a guideline, a display scale, or the like, or may be a digital method of displaying measured values as digitized numbers, but is not limited thereto.

On the other hand, the failure diagnosis apparatus 10 for a gas meter according to an embodiment of the present invention, as shown in Figures 1 to 3, the differential pressure detector 100, the first insertion tube 200, the pressure gauge 300 ) And a second insertion tube 400.

The differential pressure detector 100 is a gas meter connected to the first through hole 23 of the gas meter 1 connected to the inflow passage 22 of the gas meter 1 and to the discharge passage 32 of the gas meter 2. The differential pressure, which is connected between the second through holes 33 in (1), is a difference in pressure. That is, the differential pressure detector 100 is connected to the first through hole 23 to be connected to the first gas pressure around the inflow passage 22, and to the second through hole 33 to be connected to the second passage hole 32. The differential pressure of the gas pressure can be detected.

Accordingly, the failure diagnosis apparatus 10 for a gas meter according to an exemplary embodiment of the present invention may diagnose a failure of the gas meter 1 using the differential pressure result detected by the differential pressure detector 100. For example, when the detected differential pressure is higher than or equal to a certain level, it may be diagnosed that a failure occurs in the gas meter 1. At this time, the standard of the differential pressure for diagnosing the failure may vary depending on the specifications of the combustor, piping, etc. installed with the gas meter (1).

The first insertion tube 200 is a tube inserted into the first through hole 23 of the gas meter 1, and may include at least three tubes oriented and connected in different directions. That is, the first insertion tube 200 may include a first tube 210 and a second tube 220 connected to each other, and a third tube 230 connected therebetween. For example, the first insertion tube 200 may be a T-shaped or Y-shaped tube, but is not limited thereto. In this case, the first pipe 210 may be inserted into the first through hole 23 of the gas meter 1, and may have an open end portion thereof. Accordingly, the first tube 210 may be used as a part that is affected by the first gas pressure.

The gas pressure gauge 300 is configured to measure and display gas pressure, and may be connected to the second pipe 220. In this case, the gas pressure gauge 300 may be connected to the end of the second tube 220, or may be connected to the middle of the second tube 220. When connected to the middle of the second tube 220, the second tube 220 may have a structure in which an end thereof is closed. That is, the pressure measured and displayed by the gas pressure gauge 300 may be a first gas pressure to which the first pipe 210 connected to the second pipe 220 is applied.

The second insertion pipe 400 is a pipe inserted into the second through hole 33 of the gas meter 1. At this time, one end of the second insertion pipe 400 is located on the outer surface of the gas meter (1). In addition, the other side of the second insertion pipe 400 inserted into the second through hole 33 has a length enough to be positioned in the discharge pipe (OP) whose end is connected to the discharge port (31). Accordingly, the other side of the second insertion pipe 400 may be used as a portion subjected to the action of the second gas pressure. For example, the second insertion tube 400 may include at least two bent portions bent in different directions. In this case, the second insertion pipe 400 may be configured in the order of one end, the first bent portion, the second bent portion and the other end, but is not limited thereto.

The differential pressure detector 100 is connected between an end of the third tube 230 and one end of the second insertion tube 400. Thus, the differential pressure detector 100 has a first gas pressure to which the first tube 210 connected to the third tube 230 is applied, and a second insertion tube 400 connected to one side of the second insertion tube 400. The differential pressure of the second gas pressure acting on the other side of can be detected.

Accordingly, the failure diagnosis apparatus 10 for a gas meter according to an embodiment of the present invention diagnoses a failure of the gas meter 1 by using a value measured by the gas pressure gauge 300 and a differential pressure result detected by the differential pressure detector. This is possible. For example, when the differential pressure detected relative to the measured value of the gas pressure gauge 300 is greater than or equal to the reference value, it may be diagnosed that a failure occurs in the gas meter 1. In this case, the measurement value and the differential pressure reference for diagnosing the failure may vary depending on the specifications of the combustor, piping, etc. installed with the gas meter 1.

In particular, in order to accurately detect the differential pressure, the second insertion pipe 400 is positioned such that the other end thereof is located inside the discharge pipe OP, but at a distance not less than twice the inner diameter D of the discharge pipe OP. It may be desirable to have a length L of (L≥D).

This is because the vortex caused by the rotating body of the gas meter 1 is generated around the outlet 31 of the gas meter 1 to affect the gas pressure. That is, the point where there is no influence by the vortex inside the discharge pipe OP is a point two times or more of the inner diameter, and in the present invention, the other end of the second insertion pipe 400 is located at the point.

As illustrated in FIGS. 2 and 3, the differential pressure detector 100 may include a bent tube 110, a differential pressure indicating liquid 120, and a replenishment port 130.

The bend tube 110 is a transparent tube having the bent portion 111. At this time, the bent portion 111 may have a shape bent toward the lower or upper, but is not limited thereto. However, the bent portion 111 of the bent tube 110 is formed in the third tube so that the differential pressure indicating liquid 120 filled therein is influenced only by the first gas pressure and the second gas pressure so that its position can be changed. It may be bent in a lower direction than the end of the 230 and one end of the second insertion tube 400. For example, the bending tube 110 may be a V-shaped or U-shaped tube, but is not limited thereto.

In particular, two pipes, that is, the first inclined pipe, in the portion adjacent to the bent portion 111 in the bent pipe 110 so that the influence by the first gas pressure and the influence by the second gas pressure can be intuitively grasped. 112 and the second inclined tube 113 may have different inclinations. In this case, the first inclined tube 112 is a tube closer to the first insertion tube 200, and the second inclined tube 113 is a tube closer to the second insertion tube 400.

The differential pressure display liquid 120 is a colored liquid filled in the bent pipe 110. That is, the bending pipe 110 connected to the first insertion pipe 200 and the second insertion pipe 400 is affected by the first gas pressure and the second gas pressure acting on the respective insertion pipes 200 and 400. Accordingly, the differential pressure display liquid 120 filled in the bent tube 110 is formed around the bent portion 111 of the bent tube 110, that is, the first gas in the first inclined tube 112 and the second inclined tube 113. The filled position changes according to the pressure and the magnitude of the second gas pressure. That is, the differential pressure display liquid 120 is formed around the bent portion 111 according to the first gas pressure at the end of the first pipe 210 and the second gas pressure at the other end of the second insertion pipe 400. By changing the position, it is possible to display the differential pressure of these gas pressures.

For example, when the first gas pressure is greater than the second gas pressure, the height H1 (hereinafter, referred to as “first height”) of the differential pressure indicating liquid 120 filled in the first inclined tube 112 is second. The height H2 of the differential pressure indicator liquid 120 filled in the inclined tube 113 may be smaller than the second height. In this case, the differential pressure is proportional to the difference in these heights H ₂₁ , the second height-the first height.

On the contrary, when the second gas pressure is greater than the first gas pressure, the first height H1 may be greater than the second height H2. In this case, it is proportional to the difference of these heights (H ₁₂ , first height-second height).

In particular, in order to more accurately measure the first height H1 and the second height H2, the first inclined tube 112 or the second inclined tube 113, or the periphery thereof, may include a scale to indicate the height. Can be. For example, the scale may be displayed in various ways such as lines, numbers, symbols, and characters, but is not limited thereto.

In particular, the scale may include a reference scale 114, which is a criterion for failure determination. That is, when the differential pressure indicator liquid 120 is filled to a height greater than or equal to the reference scale 114, the user may intuitively grasp that an obstacle has occurred. However, the reference scale 114 may vary according to an appropriate specification of the combustor used, that is, the supply pressure or the capacity of the gas.

On the other hand, when the first gas pressure is greater than or equal to the second gas pressure, the differential pressure display liquid 120 may be introduced into the combustor through the second insertion pipe 400 and the discharge pipe OP in sequence. In this case, in order to prevent failure of the combustor, it may be preferable that the differential pressure display liquid 120 is made of a lubricating oil component, that is, a lubricating oil component of the combustor. For example, the lubricating oil component may include any one or more of mineral oil, synthetic oil, fatty oil, alkabenzene, polyalphaolefin, phosphate ester, and polyglycol, but is not limited thereto.

The replenishment port 130 is a port used to replenish the differential pressure indicating liquid 120 into the bent pipe 110. That is, the differential pressure display liquid 120 may be insufficient due to prolonged use or inflow into the combustor. In this case, the differential pressure display liquid 120 may be introduced into the bent pipe 110 through the replenishment port 130. You can supplement. For example, the replenishment port 130 may be formed at one end or the other end of the bending tube 110, but is not limited thereto.

In the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the following claims and their equivalents.

1: gas meter 10: fault diagnosis device for the gas meter (10)
20: inlet 21: inlet
22: inflow passage 23: first through hole
30: outlet 31: outlet
32: discharge passage 33: second through hole
40: metering section 50: display section
100: differential pressure detector 110: bending tube
111: bend 112: first inclined tube
113: second inclined tube 114: reference scale
120: differential pressure display liquid 130: replenishment port
200: first insertion tube 210: first tube
220: the second tube 230: the third tube
300: gas pressure gauge 400: ash 2 insertion pipe
IP: Inlet Piping OP: Outlet Piping

Claims (12)

An apparatus for diagnosing a failure of a gas meter including an inlet having a gas inlet and an inlet having an inlet connected to the inlet, and an outlet having a gas outlet and an outlet connected to the outlet, respectively.
It is connected between the first through hole formed in the inlet to be connected to the inlet passage and the second through hole formed in the outlet to be connected to the outlet passage to detect the differential pressure on the gas pressure around the inlet passage and the gas pressure around the outlet passage. A differential pressure detector connected between an end of the third tube and one end of the second insertion tube;
A first insertion tube having a first tube and a second tube connected to each other, and a third tube connected therebetween, wherein the first tube is inserted into the first through hole;
A gas pressure gauge connected to the second tube; And
And a second insertion tube having a length such that one end thereof is positioned outside the gas meter and the other end inserted into the second through hole is positioned inside the discharge pipe connected to the discharge port.
Disability diagnosis apparatus for a gas meter, characterized in that the fault can be diagnosed for the gas meter through the value of the gas pressure gauge and the differential pressure result detected by the differential pressure detector. delete The method of claim 1,
The second insertion pipe has a length such that the other end has a length such that it is located at a distance of at least twice the inner diameter of the discharge pipe in the discharge pipe. The method of claim 1,
The differential pressure detector,
A transparent bent tube having a bent portion having a bent shape; And
It is provided in the inside of the bent tube, and displays the differential pressure by changing the position around the bent part according to the first gas pressure acting on the end of the first tube and the second gas pressure acting on the other end of the second insertion tube. Discoloration diagnosing device for a gas meter comprising a; colored differential pressure display liquid. The method of claim 4, wherein
The bent portion is a failure diagnosis device for a gas meter, characterized in that bent in the lower direction than the lower end position than one end of the third tube and the one end of the second insertion tube. The method of claim 4, wherein
The differential pressure indicator liquid is a failure diagnosis device for a gas meter, characterized in that the lubricant component. The method of claim 4, wherein
The bent tube further includes a first inclined tube and a second inclined tube connected to the bent portion,
The differential pressure indicator liquid is a failure diagnosis device for a gas meter, characterized in that the height filled in the first inclined tube and the second inclined tube is changed according to the first gas pressure and the second gas pressure. The method of claim 7, wherein
The first inclined tube and the second inclined tube is a failure diagnosis device for a gas meter, characterized in that the inclination is formed different. The method of claim 7, wherein
The differential pressure detector,
And a scale for displaying a height of the differential pressure display liquid filled in the periphery of the first inclined tube, the second inclined tube, or any one or more thereof. The method of claim 9,
The scale is a failure diagnosis device for a gas meter, characterized in that the reference scale is a reference of whether or not the failure of the gas meter. The method of claim 4, wherein
The differential pressure detector may further include a replenishment port capable of replenishing the differential pressure display liquid into the bent pipe. In the gas meter which measures gas consumption,
An inlet having an inlet through which gas is introduced and an inlet connected to the inlet;
A discharge part having a discharge port through which gas is discharged and a discharge passage connected to the discharge port; And
It is connected between the first through hole formed in the inlet to be connected to the inlet passage and the second through hole formed in the outlet to be connected to the outlet passage to detect the differential pressure on the gas pressure around the inlet passage and the gas pressure around the outlet passage. A differential pressure detector connected between an end of the third tube and one end of the second insertion tube;
A first insertion tube having a first tube and a second tube connected to each other, and a third tube connected therebetween, wherein the first tube is inserted into the first through hole;
A gas pressure gauge connected to the second tube; And
And a second insertion tube having a length such that one end thereof is positioned outside the gas meter and the other end inserted into the second through hole is positioned inside the discharge pipe connected to the discharge port.
The gas meter, characterized in that the fault can be diagnosed for the gas meter through the value of the gas pressure gauge and the differential pressure result detected by the differential pressure detector.

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