WO2012169202A1 - Gas meter - Google Patents

Gas meter Download PDF

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Publication number
WO2012169202A1
WO2012169202A1 PCT/JP2012/003744 JP2012003744W WO2012169202A1 WO 2012169202 A1 WO2012169202 A1 WO 2012169202A1 JP 2012003744 W JP2012003744 W JP 2012003744W WO 2012169202 A1 WO2012169202 A1 WO 2012169202A1
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WIPO (PCT)
Prior art keywords
housing
filter
flow rate
inflow
gas
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PCT/JP2012/003744
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French (fr)
Japanese (ja)
Inventor
佐藤　真人
藤井　裕史
尾崎　行則
足立　明久
中林　裕治
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パナソニック株式会社
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Publication of WO2012169202A1 publication Critical patent/WO2012169202A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/662—Constructional details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/12—Cleaning arrangements; Filters
    • G01F15/125—Filters

Definitions

  • the present invention relates to a gas meter that reduces dust inflow to a flow rate measuring unit.
  • this type of gas meter is provided with a filter for removing foreign substances on the upstream side of the flow rate measuring unit (see, for example, Patent Document 1).
  • FIG. 2 shows a conventional gas meter described in Patent Document 1.
  • the gas meter 101 has an inlet 102 and an outlet 103, and inside the gas meter 101, a filter 104, a shut-off valve 105, a downward channel 106, and a flow rate measurement.
  • the horizontal flow path 107 in which the portion is disposed and the upward flow path 108 are continuously connected, and these are arranged between the inflow port 102 and the outflow port 103.
  • the present invention solves the above-described conventional problems, and provides a gas meter that reduces the inflow of dust into the flow rate measuring unit without causing a large increase in pressure loss even after a long period of time. is there.
  • a gas meter includes a housing, a gas inflow portion and an outflow portion provided in the housing, a gas inlet portion and an outlet portion disposed in the housing.
  • a flow rate measuring unit having a filter disposed inside the housing, wherein the flow rate measuring unit has the inlet portion opened in the housing, the outlet portion connected to the outflow portion, and the filter. Divides the inflow portion and the inlet portion and has an area larger than that of the inlet portion.
  • the flow of the gas flowing in from the inflow portion can be once opened to a wide space in the gas meter housing to slow down the flow velocity and facilitate the falling of dust, and further before entering the flow measurement portion.
  • the dust collection efficiency is increased, and a large increase in pressure loss due to accumulation of dust over a long period of time is less likely to occur. This can reduce dust inflow to the flow rate measuring unit.
  • the gas meter of the present invention can reduce the inflow of dust into the flow rate measuring unit by reducing the flow velocity and using a wide area filter. Further, it is difficult for pressure loss to increase due to dust accumulation in the filter over a long period of time.
  • FIG. 1A is a vertical sectional view of a gas meter according to Embodiment 1.
  • FIG. 1B is an AA ′ arrow view of FIG. 1A.
  • 2 is a vertical sectional view of a conventional gas meter.
  • a housing a gas inflow portion and an outflow portion provided in the housing, a flow rate measuring portion disposed in the housing and having a gas inlet portion and an outlet portion, and the interior of the housing
  • the flow rate measuring unit has an inlet portion that opens into the housing, the outlet portion is connected to the outflow portion, and the filter includes the inflow portion and the inlet portion.
  • the second invention is characterized in that, in the first invention, in particular, the filter is disposed horizontally between the flow rate measuring section and the inflow section.
  • the gas flowing in from the inflow portion flows out into the housing in the horizontal direction.
  • FIG. 1A shows a vertical cross-sectional view of the gas meter in the first embodiment.
  • FIG. 1B is an AA ′ arrow view of FIG. 1A.
  • FIG. 1 is a gas meter.
  • the housing 2 of the gas meter 1 has an inflow portion 3 and an outflow portion 4.
  • An inflow pipe 5 is connected to the inflow portion 3, and an outflow pipe 6 is connected to the outflow portion 4.
  • a shutoff valve 7 is connected to the inflow portion 3 inside the housing 2.
  • An inlet end 8 of the shut-off valve 7 is connected to the inflow portion 3, and an outlet end 9 is opened inside the housing 2.
  • a flow rate measuring unit 10 is disposed inside the housing 2.
  • the flow rate measuring part 10 has an inlet part 11 and an outlet part 12, the inlet part 11 is open to the inside of the housing 2, and the outlet part 12 is connected to the outflow part 4 via the connection part 13. Yes.
  • the flow rate measuring unit 10 includes, for example, a method for measuring a flow rate with ultrasonic waves, and a device for measuring a flow rate with a flow sensor. Further, the flow rate measuring unit 10 includes a unit that measures with ultrasonic waves and divides the inside of the flow path into a plurality of pieces with a plate.
  • the filter 14 is disposed inside the housing 2.
  • the filter 14 is disposed at a position that partitions the inflow portion 3 and the inlet portion 11 of the flow rate measurement unit 10.
  • the area of the filter 14 is set to be larger than the area of the inlet portion 11 of the flow rate measuring unit 10.
  • the filter 14 extends horizontally from the left side surface 15 to the right side surface 16 of the housing 2 between the inflow portion 3 and the flow rate measurement portion 10 with a full width in the depth direction of the housing 2. It arrange
  • the filter 14 is disposed at a position where the flow from the inflow portion 3 to the inlet portion 11 of the flow rate measuring portion 10 always passes.
  • the area of the filter 14 is sufficiently larger than the area of the inlet 11 of the flow rate measuring unit 10.
  • the gas inflow direction from the shutoff valve 7 to the inside of the housing 2 is configured to be a horizontal direction.
  • the gas flowing in from the inflow pipe 5 enters from the inlet 3 through the inlet end 8 of the shut-off valve 7, and then is discharged from the outlet end 9 into the internal space of the housing 2. Since the cross-sectional area of the flow path formed in the internal space is sufficiently wider than that of the inflow portion 3, the flow rate of the gas becomes slow, and a part of the dust contained in the gas falls here.
  • the filter 14 Since the filter 14 is arranged inside the housing 2 so as to partition the inside, the flow P1 discharged from the outlet end 9 of the shut-off valve 7 becomes a flow like P2 and P3 and the filter 14 is passed through. pass. Since the area of the filter 14 is sufficiently larger than the area of the inlet portion 11 of the flow rate measuring unit 10, the passage flow velocity in the filter 14 is small, and the dust collection efficiency can be increased.
  • the pressure loss is extremely small.
  • the filter since the filter is configured in the entire horizontal plane area inside the housing 2, even if dust accumulates in the filter 14 over a long period of time, the flow is a portion where dust is accumulated. Because it avoids and flows through a portion with less loss, it can be easily inferred that the pressure loss is much lower than a filter with a small area provided at the inlet of the shut-off valve as shown in the conventional example. Is.
  • the gas inflow direction to the inside of the housing 2 to be the horizontal direction
  • the gas flowing into the housing 2 diffuses to the left and right and does not pass through the filter 14 directly. It is possible to reduce concentration on a specific part.
  • the flow of the gas flowing in from the inflow portion is once opened to a wide space in the housing 2 of the gas meter so as to slow the flow rate and facilitate the fall of dust.
  • the dust collection efficiency is improved and the pressure loss due to accumulation of dust over a long period of time is large. Without increasing, the inflow of dust into the flow rate measuring unit 10 can be reduced by these comprehensive effects.
  • the filter 14 is configured to be partitioned over the entire interior of the housing 2.
  • the present invention is not limited to this.
  • a bag-like filter is disposed at the inlet 11 of the flow rate measuring unit 10. The structure etc. to perform are also possible.
  • shut-off valve is added to the constituent elements in the present embodiment, the same effect is exhibited even without the shut-off valve.
  • the gas meter according to the present invention can reduce the inflow of dust into the flow rate measuring unit without increasing the pressure loss due to accumulation of dust over a long period of time. It can be applied to a wide range of applications from large gas meters to commercial use.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Measuring Volume Flow (AREA)

Abstract

A gas meter (1) comprising: a case (2); a gas inlet section (3) and an outlet section (4) disposed in the case; a flow measurement unit (10) arranged inside the case and having a gas entrance section (11) and an exit section (12); and a filter (14) arranged inside the case. The flow measurement unit is arranged at a position such that the entrance section opens to inside the case and the exit section connects to the outlet section. The filter divides the inlet section and the entrance section and has a larger area than the entrance section.

Description

ガスメータGas meter
　本発明は、流量計測部への塵挨流入を低減するガスメータに関するものである。 The present invention relates to a gas meter that reduces dust inflow to a flow rate measuring unit.
　従来、この種のガスメータは、流量計測部の上流側に異物除去用のフィルタを設けている（例えば、特許文献１参照）。 Conventionally, this type of gas meter is provided with a filter for removing foreign substances on the upstream side of the flow rate measuring unit (see, for example, Patent Document 1).
　図２は、特許文献１に記載された従来のガスメータを示すものである。 FIG. 2 shows a conventional gas meter described in Patent Document 1.
　図２に示すように、ガスメータ１０１は、流入口１０２と、流出口１０３と、を有しており、ガスメータ１０１の内部では、フィルタ１０４と、遮断弁１０５と、下向き流路１０６と、流量計測部が配設された水平流路１０７と、上向き流路１０８とが連続して接続されており、これらが流入口１０２と流出口１０３との間に配置された構成となっている。 As shown in FIG. 2, the gas meter 101 has an inlet 102 and an outlet 103, and inside the gas meter 101, a filter 104, a shut-off valve 105, a downward channel 106, and a flow rate measurement. The horizontal flow path 107 in which the portion is disposed and the upward flow path 108 are continuously connected, and these are arranged between the inflow port 102 and the outflow port 103.
特開２００４－１０１３０３号公報JP 2004-101303 A
　しかしながら、前記従来の構成では、流入口１０２より流入した異物は、流入口１０２直後のフィルタ１０４に堆積するため、長期間の後には圧力損失となり、ガスメータ１０１に所定の流量を流すことができなくなるという課題を有していた。 However, in the conventional configuration, the foreign matter that flows in from the inlet 102 accumulates on the filter 104 immediately after the inlet 102, and thus becomes a pressure loss after a long period of time, so that a predetermined flow rate cannot flow through the gas meter 101. It had the problem that.
　本発明は、前記従来の課題を解決するもので、長期間経過しても大きな圧力損失の増加を生じることなく流量計測部への塵挨の流入を低減するようにしたガスメータを提供するものである。 The present invention solves the above-described conventional problems, and provides a gas meter that reduces the inflow of dust into the flow rate measuring unit without causing a large increase in pressure loss even after a long period of time. is there.
　前記従来の課題を解決するために、本発明のガスメータは、筺体と、前記筺体に設けられたガスの流入部、および流出部と、前記筺体内に配置され、ガスの入口部と出口部とを有する流量計測部と、前記筺体内部に配置されたフィルタと、を備え、前記流量計測部は前記入口部が前記筺体内に開口するとともに、前記出口部が前記流出部に接続され、前記フィルタは前記流入部と前記入口部とを区画するとともに、前記入口部より大きい面積を有したものである。 In order to solve the conventional problems, a gas meter according to the present invention includes a housing, a gas inflow portion and an outflow portion provided in the housing, a gas inlet portion and an outlet portion disposed in the housing. A flow rate measuring unit having a filter disposed inside the housing, wherein the flow rate measuring unit has the inlet portion opened in the housing, the outlet portion connected to the outflow portion, and the filter. Divides the inflow portion and the inlet portion and has an area larger than that of the inlet portion.
　かかる構成では、流入部より流入したガスの流れを、いったんガスメータの筺体内の広い空間に開放して流速を遅くして塵挨の落下を容易にすることができ、さらに流量計測部に入る前に広い面積のフィルタにより低流速で塵挨を捕集するため、塵挨の捕集効率を高めるとともに、長期間にわたる塵挨の蓄積による大きな圧力損失の増加を来しにくくし、これらの総合効果により流量計測部への塵挨流入を低減することができる。 In such a configuration, the flow of the gas flowing in from the inflow portion can be once opened to a wide space in the gas meter housing to slow down the flow velocity and facilitate the falling of dust, and further before entering the flow measurement portion. In addition to collecting dust at a low flow rate with a large area filter, the dust collection efficiency is increased, and a large increase in pressure loss due to accumulation of dust over a long period of time is less likely to occur. This can reduce dust inflow to the flow rate measuring unit.
　本発明のガスメータは、流速の低下と広い面積のフィルタにより流量計測部への塵挨流入を低減することができる。また、長期間にわたるフィルタへの塵挨蓄積によっても圧力損失の増加を来しにくい。 The gas meter of the present invention can reduce the inflow of dust into the flow rate measuring unit by reducing the flow velocity and using a wide area filter. Further, it is difficult for pressure loss to increase due to dust accumulation in the filter over a long period of time.
図１Ａは、実施の形態１におけるガスメータの垂直断面図である。FIG. 1A is a vertical sectional view of a gas meter according to Embodiment 1. FIG. 図１Ｂは、図１ＡのＡＡ’矢視図である。FIG. 1B is an AA ′ arrow view of FIG. 1A. 図２は、従来のガスメータの垂直断面図2 is a vertical sectional view of a conventional gas meter.
　第１の発明は、筺体と、前記筺体に設けられたガスの流入部、および流出部と、前記筺体内に配置され、ガスの入口部と出口部とを有する流量計測部と、前記筺体内部に配置されたフィルタと、を備え、前記流量計測部は前記入口部が前記筺体内に開口するとともに、前記出口部が前記流出部に接続され、前記フィルタは前記流入部と前記入口部とを区画するとともに、前記入口部より大きい面積を有することにより、流入部より流入したガスの流れを、いったんガスメータの筺体内の広い空間に開放して流速を遅くして塵挨の落下を容易にすることができ、さらに流量計測部に入る前に広い面積のフィルタにより低流速で塵挨を捕集するため、塵挨の捕集効率を高めるとともに、長期間にわたる塵挨の蓄積による、大きな圧力損失の増加を来しにくくし、これらの総合効果により、流量計測部への塵挨流入を低減するようにしたものである。 According to a first aspect of the present invention, there is provided a housing, a gas inflow portion and an outflow portion provided in the housing, a flow rate measuring portion disposed in the housing and having a gas inlet portion and an outlet portion, and the interior of the housing The flow rate measuring unit has an inlet portion that opens into the housing, the outlet portion is connected to the outflow portion, and the filter includes the inflow portion and the inlet portion. By partitioning and having an area larger than the inlet portion, the flow of gas flowing in from the inflow portion is once opened to a wide space in the housing of the gas meter to slow down the flow rate and facilitate the fall of dust. In addition, since it collects dust at a low flow rate with a wide area filter before entering the flow measurement unit, it increases dust collection efficiency and large pressure loss due to accumulation of dust over a long period of time increase of Hardly Kitashi, these total effect is obtained by so as to reduce the Chiri挨 flowing into the flow rate measurement unit.
　第２の発明は、特に第１の発明において、前記フィルタが、前記流量計測部と前記流入部との間に水平に配置されていることを特徴とするものである。 The second invention is characterized in that, in the first invention, in particular, the filter is disposed horizontally between the flow rate measuring section and the inflow section.
　第３の発明は、特に第２の発明において、前記流入部から流入したガスが、前記筺体内へと水平方向に流出するようにしたものである。 In the third invention, in particular, in the second invention, the gas flowing in from the inflow portion flows out into the housing in the horizontal direction.
　以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によって本発明が限定されるものではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.
　（実施の形態１）
　実施の形態１ついて、図１Ａ、図１Ｂを参照しながら説明する。図１Ａは、実施の形態１におけるガスメータの垂直断面図を示すものである。図１Ｂは、図１ＡのＡＡ’矢視図である。 (Embodiment 1)
The first embodiment will be described with reference to FIGS. 1A and 1B. FIG. 1A shows a vertical cross-sectional view of the gas meter in the first embodiment. FIG. 1B is an AA ′ arrow view of FIG. 1A.
　図１において１はガスメータである。ガスメータ１の筺体２は、流入部３と流出部４とを有している。流入部３には流入パイプ５が接続され、流出部４には流出パイプ６が接続されている。 1 in FIG. 1 is a gas meter. The housing 2 of the gas meter 1 has an inflow portion 3 and an outflow portion 4. An inflow pipe 5 is connected to the inflow portion 3, and an outflow pipe 6 is connected to the outflow portion 4.
　筺体２の内部において、流入部３には遮断弁７が接続されている。この遮断弁７の入口端８は流入部３に接続され、出口端９は筺体２の内部に開放されている。 A shutoff valve 7 is connected to the inflow portion 3 inside the housing 2. An inlet end 8 of the shut-off valve 7 is connected to the inflow portion 3, and an outlet end 9 is opened inside the housing 2.
　また、筺体２の内部には、流量計測部１０が、配置されている。流量計測部１０は入口部１１と出口部１２とを有しており、入口部１１は筺体２の内部に開放されており、出口部１２は接続部１３を介して流出部４に接続されている。 In addition, a flow rate measuring unit 10 is disposed inside the housing 2. The flow rate measuring part 10 has an inlet part 11 and an outlet part 12, the inlet part 11 is open to the inside of the housing 2, and the outlet part 12 is connected to the outflow part 4 via the connection part 13. Yes.
　流量計測部１０としては、例えば超音波で流量を計測する方式のものや、フローセンサで流量を計測するものがある。また、流量計測部１０には、超音波で計測するもので、その流路内部を板で複数に分割するものも含まれる。 The flow rate measuring unit 10 includes, for example, a method for measuring a flow rate with ultrasonic waves, and a device for measuring a flow rate with a flow sensor. Further, the flow rate measuring unit 10 includes a unit that measures with ultrasonic waves and divides the inside of the flow path into a plurality of pieces with a plate.
　筺体２の内部にはフィルタ１４が配置されている。なお、フィルタ１４は、流入部３と流量計測部１０の入口部１１とを区画する位置に配置されている。 The filter 14 is disposed inside the housing 2. The filter 14 is disposed at a position that partitions the inflow portion 3 and the inlet portion 11 of the flow rate measurement unit 10.
　また、フィルタ１４の面積は、流量計測部１０の入口部１１の面積よりも大きくなるように設定されている。 Further, the area of the filter 14 is set to be larger than the area of the inlet portion 11 of the flow rate measuring unit 10.
　本実施の形態の場合、フィルタ１４は筺体２の左側面１５から右側面１６にわたり、筺体２の奥行き方向一杯の幅で流入部３と流量計測部１０との間に水平に取り付けられており、筺体２の内部がフィルタ１４により区画されるように配置されている。 In the case of the present embodiment, the filter 14 extends horizontally from the left side surface 15 to the right side surface 16 of the housing 2 between the inflow portion 3 and the flow rate measurement portion 10 with a full width in the depth direction of the housing 2. It arrange | positions so that the inside of the housing 2 may be divided by the filter 14. FIG.
　すなわち、フィルタ１４は、流入部３から流量計測部１０の入口部１１への流れが必ず通過する位置に配置されている。この場合のフィルタ１４の面積は流量計測部１０の入口部１１の面積よりも十分大きいものである。 That is, the filter 14 is disposed at a position where the flow from the inflow portion 3 to the inlet portion 11 of the flow rate measuring portion 10 always passes. In this case, the area of the filter 14 is sufficiently larger than the area of the inlet 11 of the flow rate measuring unit 10.
　また、本実施の形態においては、遮断弁７から筺体２の内部へのガスの流入方向は、水平方向となるように構成している。 Further, in the present embodiment, the gas inflow direction from the shutoff valve 7 to the inside of the housing 2 is configured to be a horizontal direction.
　以上のように構成されたガスメータ１について、以下、その動作および作用を説明する。まず、流入パイプ５より流入したガスは、流入部３から遮断弁７の入口端８より入り、その後、出口端９より筺体２の内部空間に放出される。この内部空間に形成される流路の断面積は流入部３より十分広いため、ガスの流速は遅くなり、ガスに含まれている塵挨はここでその一部が落下する。 The operation and action of the gas meter 1 configured as described above will be described below. First, the gas flowing in from the inflow pipe 5 enters from the inlet 3 through the inlet end 8 of the shut-off valve 7, and then is discharged from the outlet end 9 into the internal space of the housing 2. Since the cross-sectional area of the flow path formed in the internal space is sufficiently wider than that of the inflow portion 3, the flow rate of the gas becomes slow, and a part of the dust contained in the gas falls here.
　筺体２の内部には、内部を区画するようにフィルタ１４が配置されているため、遮断弁７の出口端９より放出された流れＰ１は、Ｐ２、Ｐ３のような流れとなってフィルタ１４を通過する。このフィルタ１４の面積は流量計測部１０の入口部１１の面積より十分大きいため、フィルタ１４における通過流速が小さく、塵埃の捕集効率を高めることができるものである。 Since the filter 14 is arranged inside the housing 2 so as to partition the inside, the flow P1 discharged from the outlet end 9 of the shut-off valve 7 becomes a flow like P2 and P3 and the filter 14 is passed through. pass. Since the area of the filter 14 is sufficiently larger than the area of the inlet portion 11 of the flow rate measuring unit 10, the passage flow velocity in the filter 14 is small, and the dust collection efficiency can be increased.
　また、フィルタ１４の面積が大きいことにより圧力損失もきわめて少ないものである。とりわけ、本実施の形態では、筐体２内部の水平面の領域全体にフィルタを構成しているので、長期間にわたって、フィルタ１４に塵埃が蓄積したとしても、流れは塵埃が蓄積している部分を回避して、より損失の少ない部分を流れるため、従来例で示したような遮断弁の入口に設けられた面積の小さいフィルタと比較して、圧力損失は格段に低いことが容易に類推されるものである。 Also, since the area of the filter 14 is large, the pressure loss is extremely small. In particular, in the present embodiment, since the filter is configured in the entire horizontal plane area inside the housing 2, even if dust accumulates in the filter 14 over a long period of time, the flow is a portion where dust is accumulated. Because it avoids and flows through a portion with less loss, it can be easily inferred that the pressure loss is much lower than a filter with a small area provided at the inlet of the shut-off valve as shown in the conventional example. Is.
　さらに、筺体２の内部へのガスの流入方向を水平方向とすることにより、筐体２に流入したガスは左右に拡散し、直接フィルタ１４を通過することがないので、塵埃の蓄積がフィルタ１４の特定の部位に集中することを低減できる。 Further, by setting the gas inflow direction to the inside of the housing 2 to be the horizontal direction, the gas flowing into the housing 2 diffuses to the left and right and does not pass through the filter 14 directly. It is possible to reduce concentration on a specific part.
　以上のように、本実施の形態においては、流入部より流入したガスの流れを、いったんガスメータの筺体２内の広い空間に開放して流速を遅くして塵挨の落下を容易にすることができ、さらに流量計測部１０に入る前に広い面積のフィルタ１４により低流速で塵挨を捕集するため、塵挨の捕集効率を高めるとともに、長期間にわたる塵挨の蓄積による圧力損失の大きな増加を来すことがなく、これらの総合効果により流量計測部１０への塵挨流入を低減することができる。 As described above, in the present embodiment, the flow of the gas flowing in from the inflow portion is once opened to a wide space in the housing 2 of the gas meter so as to slow the flow rate and facilitate the fall of dust. In addition, since dust is collected at a low flow rate by the filter 14 having a large area before entering the flow rate measuring unit 10, the dust collection efficiency is improved and the pressure loss due to accumulation of dust over a long period of time is large. Without increasing, the inflow of dust into the flow rate measuring unit 10 can be reduced by these comprehensive effects.
　なお、本実施の形態でフィルタ１４を筐体２の内部全体にわたり区画する構成としたが、これに限定されるものではなく、例えば、流量計測部１０の入口部１１に袋状のフィルタを配置する構成等も可能である。 In the present embodiment, the filter 14 is configured to be partitioned over the entire interior of the housing 2. However, the present invention is not limited to this. For example, a bag-like filter is disposed at the inlet 11 of the flow rate measuring unit 10. The structure etc. to perform are also possible.
　また、本実施の形態で遮断弁を構成要素に加えたが、遮断弁がなくても同様の効果が発揮されるものである。 In addition, although the shut-off valve is added to the constituent elements in the present embodiment, the same effect is exhibited even without the shut-off valve.
　以上のように、本発明にかかるガスメータは、長期間にわたり、塵挨の蓄積による圧力損失の増加を来すことなく流量計測部への塵挨流入を低減することが可能となるので、家庭用から業務用に至る大型のガスメータまで幅広い用途に適用できる。 As described above, the gas meter according to the present invention can reduce the inflow of dust into the flow rate measuring unit without increasing the pressure loss due to accumulation of dust over a long period of time. It can be applied to a wide range of applications from large gas meters to commercial use.
　１　ガスメータ
　２　筺体
　３　流入部
　４　流出部
　１０　流量計測部
　１１　入口部
　１２　出口部
　１３　接続部
　１４　フィルタ DESCRIPTION OF SYMBOLS 1 Gas meter 2 Housing 3 Inflow part 4 Outflow part 10 Flow measurement part 11 Inlet part 12 Outlet part 13 Connection part 14 Filter

Claims (3)

  1. 　筺体と、
    　前記筺体に設けられたガスの流入部、および流出部と、
    　前記筺体内に配置され、ガスの入口部と出口部とを有する流量計測部と、
    　前記筺体内部に配置されたフィルタと、を備え、
    　前記流量計測部は前記入口部が前記筺体内に開口するとともに、前記出口部が前記流出部に接続され、前記フィルタは前記流入部と前記入口部とを区画するとともに、前記入口部より大きい面積を有したガスメータ。     The body,
    An inflow portion and an outflow portion of gas provided in the housing;
    A flow rate measuring unit disposed in the housing and having a gas inlet and outlet;
    A filter disposed inside the housing,
    In the flow rate measuring unit, the inlet portion opens into the housing, the outlet portion is connected to the outflow portion, the filter partitions the inflow portion and the inlet portion, and has a larger area than the inlet portion. Gas meter with.
  2. 　前記フィルタが、前記流量計測部と前記流入部との間に水平に配置されていることを特徴とする請求項１記載のガスメータ。 The gas meter according to claim 1, wherein the filter is disposed horizontally between the flow rate measuring unit and the inflow unit.
  3. 　前記流入部から流入したガスが、前記筺体内へと水平方向に流出するようにした請求項２記載のガスメータ。 The gas meter according to claim 2, wherein the gas flowing in from the inflow portion flows out horizontally into the housing.
PCT/JP2012/003744 2011-06-10 2012-06-07 Gas meter WO2012169202A1 (en)

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EP2813824A1 (en) * 2013-06-12 2014-12-17 Itron GmbH Gas meter and particle trap
WO2014198691A1 (en) * 2013-06-12 2014-12-18 Itron Gmbh Gas meter and particle trap
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CN107167204B (en) * 2017-07-05 2024-02-27 上海埃科燃气测控设备有限公司 Integrated IC card gas roots flowmeter box
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US11181412B2 (en) 2018-11-10 2021-11-23 Itron Global Sarl Gas meter contamination filtering device

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