JP7506538B2 - Regulator integrated gas meter and pressure regulator - Google Patents

Regulator integrated gas meter and pressure regulator Download PDF

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JP7506538B2
JP7506538B2 JP2020114741A JP2020114741A JP7506538B2 JP 7506538 B2 JP7506538 B2 JP 7506538B2 JP 2020114741 A JP2020114741 A JP 2020114741A JP 2020114741 A JP2020114741 A JP 2020114741A JP 7506538 B2 JP7506538 B2 JP 7506538B2
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江美 迫
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Yazaki Energy System Corp
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Description

本発明は、調整器一体型ガスメータ及び圧力調整器に関する。 The present invention relates to a gas meter with integrated regulator and a pressure regulator.

従来、高圧ガスボンベからの燃料ガスを需要者側まで供給するガス供給システムは、完成検査として気密試験が実施される(特許文献1参照)。気密試験では圧力調整器の下流側となる低圧部に8.4kPa以上の圧力をかける。一方で調整器の安全弁吹き出し圧力は5.6kPa以上8.4kPa以下であり、低圧部に気密試験の圧力をかけることができない。そこで、従来のガス供給システムでは、ガスメータと圧力調整器との間に設けられたガス栓を閉栓することで、低圧部のうちガス栓下流側の部位の気密試験を行って試験圧力が圧力調整器にかからないようにしている。 Conventionally, gas supply systems that supply fuel gas from high-pressure gas cylinders to consumers are subjected to airtightness tests as part of their final inspection (see Patent Document 1). In the airtightness test, a pressure of 8.4 kPa or more is applied to the low-pressure section downstream of the pressure regulator. However, the regulator's safety valve blow-out pressure is 5.6 kPa or more and 8.4 kPa or less, so the airtightness test pressure cannot be applied to the low-pressure section. Therefore, in conventional gas supply systems, the gas valve installed between the gas meter and the pressure regulator is closed to perform an airtightness test on the part of the low-pressure section downstream of the gas valve, preventing the test pressure from being applied to the pressure regulator.

特開2010-174916号公報JP 2010-174916 A

ここで、圧力調整器とガスメータとを近接させた調整器一体型ガスメータについては、圧力調整器とガスメータとの間にガス栓を有しない構成となっている。このため、従来のようにガス栓を閉じることができないことから、気密試験用に新たにガス栓を設けることが考えられる。 Here, in the case of a regulator-integrated gas meter in which the pressure regulator and gas meter are placed close to each other, there is no gas valve between the pressure regulator and the gas meter. Because of this, it is not possible to close the gas valve as in the past, and it is therefore possible to consider providing a new gas valve for airtightness testing.

しかし、圧力調整器とガスメータとの近接関係を保つ観点から、例えば圧力調整器とガスメータとの間ではなくガスメータの出口側にガス栓を設けた場合には、気密試験時には圧力調整器の安全弁が動作して低圧部(ガスメータの出口側のガス栓よりも下流側を除く)を試験圧力まで高めることができなくなってしまう。そこで、圧力調整器とガスメータとの間にガス栓を設けることが考えられるが、この場合には、折角圧力調整器とガスメータとを近接させたにもかかわらず、両者を離すこととなり、調整器一体型ガスメータの全長が延びる結果となってしまう。 However, from the viewpoint of maintaining the close relationship between the pressure regulator and the gas meter, for example, if a gas valve is provided on the outlet side of the gas meter rather than between the pressure regulator and the gas meter, the safety valve of the pressure regulator will operate during the airtightness test, making it impossible to raise the low pressure section (excluding the downstream side of the gas valve on the outlet side of the gas meter) to the test pressure. Therefore, it is possible to provide a gas valve between the pressure regulator and the gas meter, but in this case, despite the fact that the pressure regulator and the gas meter have been placed close to each other, they would have to be separated, which would result in an increase in the overall length of the gas meter with integrated regulator.

本発明はこのような従来の課題を解決するためになされたものであり、その目的とするところは、全長が延びてしまう事態を抑制すると共に、低圧部を試験圧力まで高めることができる調整器一体型ガスメータ及び圧力調整器を提供することにある。 The present invention was made to solve these problems, and its purpose is to provide a regulator-integrated gas meter and pressure regulator that can prevent the overall length from increasing and can raise the low pressure section to the test pressure.

本発明に係る調整器一体型ガスメータは、ガス容器からの高圧ガスを減圧する圧力調整器と、前記圧力調整器の出口流路に接続されるガスメータと、を備えた調整器一体型ガスメータであって、前記圧力調整器は、他面が大気室からの圧力を受け、一面が燃料ガス側となるガス室からの圧力を受けるダイヤフラムと、前記ダイヤフラムの一面側及び他面側への変位に応じて前記ガス室への燃料ガスの導入量を制御する減圧弁と、前記ガス室の圧力が所定圧力を超える場合に前記ガス室内と前記大気室とを連通させて前記ガス室の圧力を前記大気室側に逃がす安全弁吹き出し機構と、前記大気室と前記圧力調整器の外部とを接続する貫通孔に設けられ、操作部への操作がされていない状態において前記貫通孔を開放し、前記操作部への操作がされた状態において前記貫通孔を閉塞する弁機構と、を備える。 The regulator-integrated gas meter of the present invention is a regulator-integrated gas meter comprising a pressure regulator which reduces the pressure of high-pressure gas from a gas container, and a gas meter connected to an outlet flow path of the pressure regulator, wherein the pressure regulator comprises a diaphragm which receives pressure from an atmospheric chamber on one side and a gas chamber which is a fuel gas side on one side, a pressure reducing valve which controls the amount of fuel gas introduced into the gas chamber in accordance with the displacement of the diaphragm to one side and the other side, a safety valve blow-out mechanism which connects the gas chamber and the atmospheric chamber when the pressure of the gas chamber exceeds a predetermined pressure, thereby releasing the pressure of the gas chamber to the atmospheric chamber side, and a valve mechanism which is provided in a through hole connecting the atmospheric chamber and the outside of the pressure regulator, and which opens the through hole when an operating unit is not operated, and closes the through hole when the operating unit is operated .

本発明に係る圧力調整器は、ガス容器からの高圧ガスを減圧すると共に出口流路がガスメータに接続される圧力調整器であって、他面が大気室からの圧力を受け、一面が燃料ガス側となるガス室からの圧力を受けるダイヤフラムと、前記ダイヤフラムの一面側及び他面側への変位に応じて前記ガス室への燃料ガスの導入量を制御する減圧弁と、前記ガス室の圧力が所定圧力を超える場合に前記ガス室内と前記大気室とを連通させて前記ガス室の圧力を前記大気室側に逃がす安全弁吹き出し機構と、前記大気室と前記圧力調整器の外部とを接続する貫通孔に設けられ、操作部への操作がされていない状態において前記貫通孔を開放し、前記操作部への操作がされた状態において前記貫通孔を閉塞する弁機構と、を備える。
The pressure regulator of the present invention is a pressure regulator that reduces the pressure of high-pressure gas from a gas container and has an outlet flow path connected to a gas meter, and comprises a diaphragm that receives pressure from an atmospheric chamber on one side and pressure from a gas chamber that is the fuel gas side on the other side, a pressure reducing valve that controls the amount of fuel gas introduced into the gas chamber in accordance with displacement of the diaphragm to one side and the other side, a safety valve blow-out mechanism that connects the gas chamber and the atmospheric chamber to release the pressure of the gas chamber to the atmospheric chamber side when the pressure of the gas chamber exceeds a predetermined pressure, and a valve mechanism that is provided in a through hole connecting the atmospheric chamber and the outside of the pressure regulator, and that opens the through hole when no operation is performed on the operating unit and closes the through hole when the operating unit is operated.

本発明によれば、全長が延びてしまう事態を抑制すると共に、低圧部を試験圧力まで高めることができる調整器一体型ガスメータ及び圧力調整器を提供することができる。 The present invention provides a regulator-integrated gas meter and pressure regulator that can prevent the overall length from increasing and can raise the low pressure section to the test pressure.

本発明の実施形態に係る調整器一体型ガスメータを示す斜視図である。FIG. 1 is a perspective view showing a regulator-integrated gas meter according to an embodiment of the present invention. 図1に示した圧力調整器の二次調整器の要部構成を示す断面図である。2 is a cross-sectional view showing a configuration of a main part of a secondary regulator of the pressure regulator shown in FIG. 1 . 図2に示した弁機構の拡大図であり、(a)は弁開状態を示し、(b)は弁閉状態を示している。3A and 3B are enlarged views of the valve mechanism shown in FIG. 2, in which FIG. 3A shows a valve open state and FIG. 3B shows a valve closed state. 本実施形態に係る調整器一体型ガスメータの気密試験方法を示す第1の工程図である。1 is a first process diagram showing an airtightness test method for a regulator-integrated gas meter according to this embodiment. FIG. 本実施形態に係る調整器一体型ガスメータの気密試験方法を示す第2の工程図である。A second process diagram showing the airtightness testing method for the regulator-integrated gas meter of this embodiment. 本実施形態に係る調整器一体型ガスメータの気密試験方法を示す第3の工程図である。A third process diagram showing the airtightness test method for the regulator-integrated gas meter of this embodiment. 本実施形態に係る調整器一体型ガスメータの気密試験方法を示す第4の工程図である。FIG. 4 is a fourth process diagram showing the airtightness testing method for the regulator-integrated gas meter according to this embodiment. 本実施形態に係る調整器一体型ガスメータの気密試験方法を示す第5の工程図である。A fifth process diagram showing the airtightness testing method of the regulator-integrated gas meter of this embodiment.

以下、本発明を好適な実施形態に沿って説明する。なお、本発明は以下に示す実施形態に限られるものではなく、本発明の趣旨を逸脱しない範囲において適宜変更可能である。また、以下に示す実施形態においては、一部構成の図示や説明を省略している箇所があるが、省略された技術の詳細については、以下に説明する内容と矛盾が発生しない範囲内において、適宜公知又は周知の技術が適用されていることはいうまでもない。 The present invention will be described below in accordance with a preferred embodiment. Note that the present invention is not limited to the embodiment described below, and can be modified as appropriate without departing from the spirit of the present invention. In addition, in the embodiment described below, some configurations are omitted from illustration and description, but it goes without saying that publicly known or well-known technologies are used as appropriate for the details of the omitted technologies, within the scope of not causing any contradiction with the contents described below.

図1は、本発明の実施形態に係る調整器一体型ガスメータを示す斜視図である。図1に示すように、調整器一体型ガスメータ1は、圧力調整器2と、ガスメータ3とを備えて構成されている。圧力調整器2は、一次調整器10と、二次調整器20とを備えている。 Figure 1 is a perspective view showing a regulator-integrated gas meter according to an embodiment of the present invention. As shown in Figure 1, the regulator-integrated gas meter 1 is configured with a pressure regulator 2 and a gas meter 3. The pressure regulator 2 is equipped with a primary regulator 10 and a secondary regulator 20.

一次調整器10は、いわゆる切替機能付きの元調整器であって、左右に接続されるLPガスボンベ(不図示:ガス容器)のうち、どちらから(どちらの入口部10aから)燃料ガスを導入するかを選択するための切替レバー10bを正面側に備えている。図1に示す例において切替レバー10bは右側を向いており、右側の入口部10aから燃料ガスを導入することとなる。 The primary regulator 10 is a so-called original regulator with a switching function, and is equipped with a switching lever 10b on the front side for selecting from which of the LP gas cylinders (gas containers not shown) connected to the left and right (from which inlet 10a) fuel gas is introduced. In the example shown in Figure 1, the switching lever 10b faces to the right, and fuel gas is introduced from the right inlet 10a.

また、一次調整器10は、内部にダイヤフラム等を備えており、ダイヤフラムの動作に応じて内部の弁体を開閉動作させることによって高圧の燃料ガスを中圧とする一次減圧を行う構成となっている。一次減圧された燃料ガスは、二次調整器20に供給される。 The primary regulator 10 also has a diaphragm etc. inside, and is configured to perform primary pressure reduction to reduce high-pressure fuel gas to medium pressure by opening and closing the internal valve body in response to the operation of the diaphragm. The primarily reduced-pressure fuel gas is supplied to the secondary regulator 20.

二次調整器20は、一次減圧された中圧の燃料ガスを低圧とする二次減圧を行うものである。二次調整器20についても一次調整器10と同様に、内部にダイヤフラム(後述の符号21)等を備えており、ダイヤフラムの動作に応じて内部の減圧弁(後述の符号26)を開閉動作させることによって二次減圧を行う。二次減圧された燃料ガスは、出口部(出口流路)20aを通じてガスメータ3に供給される。 The secondary regulator 20 performs secondary pressure reduction to reduce the medium pressure fuel gas that has been primarily reduced in pressure to low pressure. Like the primary regulator 10, the secondary regulator 20 also has an internal diaphragm (reference number 21 described below) and performs secondary pressure reduction by opening and closing an internal pressure reducing valve (reference number 26 described below) in response to the operation of the diaphragm. The secondarily reduced pressure fuel gas is supplied to the gas meter 3 through the outlet portion (outlet flow path) 20a.

ガスメータ3は、略四角柱状の外形を有しており、四角柱の高さ方向に長手となる直管形状とされている。図1に示す例においてガスメータ3は、その長手方向が鉛直方向と一致するように設置されており、長手方向の一端側となる鉛直下側が二次調整器20の出口部20aと接続されており、長手方向の他端側となる鉛直上側が需要者側につながっている。 The gas meter 3 has an approximately rectangular prism-like outer shape, and is a straight pipe shape with its length in the height direction of the rectangular prism. In the example shown in FIG. 1, the gas meter 3 is installed so that its length coincides with the vertical direction, with the vertical lower side, which is one end of the length, connected to the outlet 20a of the secondary regulator 20, and the vertical upper side, which is the other end of the length, connected to the consumer side.

ガスメータ3は、内部に高さ方向に延びる流路を有し、流路を流れる燃料ガスの流速を計測する流速センサ(不図示)が設けられている。流速センサは、例えば流速に応じて超音波信号の伝搬時間が変化する超音波センサによって構成されている。このようなガスメータ3はマイコン(不図示)を有し、流速センサによって得られた流速と流路径との関係から、ガスメータ3を通過する燃料ガスの流量を計測する。 The gas meter 3 has a flow path extending in the height direction inside, and is provided with a flow rate sensor (not shown) that measures the flow rate of the fuel gas flowing through the flow path. The flow rate sensor is, for example, an ultrasonic sensor in which the propagation time of an ultrasonic signal changes depending on the flow rate. Such a gas meter 3 has a microcomputer (not shown) that measures the flow rate of the fuel gas passing through the gas meter 3 from the relationship between the flow rate obtained by the flow rate sensor and the flow path diameter.

また、ガスメータ3は、正面側の上部に表示パネル3aを備えている。表示パネル3aは、LCD(Liquid Crystal Display)等によって構成されている。表示パネル3aは、マイコンに制御され、マイコンによって処理された情報を表示する。表示パネル3aに表示される代表的な情報は、燃料ガスの流量の積算値(積算流量)である。 The gas meter 3 also has a display panel 3a at the top of the front side. The display panel 3a is composed of an LCD (Liquid Crystal Display) or the like. The display panel 3a is controlled by a microcomputer and displays information processed by the microcomputer. A typical piece of information displayed on the display panel 3a is the integrated value of the fuel gas flow rate (integrated flow rate).

図2は、図1に示した圧力調整器2の二次調整器20の要部構成を示す断面図である。図2に示すように、二次調整器20は、減圧室(ガス室)Dと、大気室Aと、ダイヤフラム21と、コイルスプリング22と、軸部材23と、レバー部材24と、ピン25と、減圧弁26と、弁座27とを備えている。 Figure 2 is a cross-sectional view showing the main configuration of the secondary regulator 20 of the pressure regulator 2 shown in Figure 1. As shown in Figure 2, the secondary regulator 20 includes a pressure reduction chamber (gas chamber) D, an atmospheric chamber A, a diaphragm 21, a coil spring 22, a shaft member 23, a lever member 24, a pin 25, a pressure reducing valve 26, and a valve seat 27.

減圧室Dは、需要者に供給する燃料ガスを一時的に保持する部位である。大気室Aは、外部と連通することにより内部が大気圧となる部位である。ダイヤフラム21は、周縁が筐体Bに固定された略円形の薄膜であって、減圧室Dと大気室Aとを気密に隔てるものである。また、ダイヤフラム21は、コイルスプリング22により減圧室D側(一面側)に付勢されている。 The reduced pressure chamber D is a portion that temporarily holds the fuel gas to be supplied to the consumer. The atmospheric chamber A is a portion that is connected to the outside and has an atmospheric pressure inside. The diaphragm 21 is a roughly circular thin film whose periphery is fixed to the housing B, and it airtightly separates the reduced pressure chamber D from the atmospheric chamber A. The diaphragm 21 is also biased toward the reduced pressure chamber D side (one side) by a coil spring 22.

軸部材23は、ダイヤフラム21の中心を軸方向に貫通して設けられる部材であって、減圧室D側の先端にレバー部材24の一端側が取り付けられている。レバー部材24は略L字形状となる部材であって、L字の屈曲部分近傍にピン25が設けられている。レバー部材24は、このピン25を中心に回動可能となっている。また、レバー部材24の他端は減圧弁26が接続されている。減圧弁26は、ガスメータ3側へ燃料ガスを供給したり遮断したりするための弁である。 The shaft member 23 is a member that passes through the center of the diaphragm 21 in the axial direction, and one end of the lever member 24 is attached to the tip on the pressure reduction chamber D side. The lever member 24 is a roughly L-shaped member, and a pin 25 is provided near the bent part of the L. The lever member 24 is rotatable around this pin 25. The other end of the lever member 24 is connected to a pressure reducing valve 26. The pressure reducing valve 26 is a valve for supplying or cutting off fuel gas to the gas meter 3 side.

このような二次調整器20は、図2に示すように、ダイヤフラム21が所定位置にあるときに、減圧弁26を弁座27に接触させて弁閉状態とし、燃料ガスの導入を遮断している。このような状態から燃料ガスが使用されると、減圧室Dの圧力が低下する。減圧室Dの圧力が低下すると、コイルスプリング22の付勢力によってダイヤフラム21が一面側に変位する。このとき、軸部材23も一面側に変位し、軸部材23の先端に取り付けられたレバー部材24はピン25を中心として回動する。この回動によって、減圧弁26は弁座27から離れて弁開状態となり、燃料ガスを減圧室Dに導入させる。 As shown in FIG. 2, when the diaphragm 21 is in a predetermined position, this secondary regulator 20 brings the pressure reducing valve 26 into contact with the valve seat 27 to close the valve and block the introduction of fuel gas. When fuel gas is used in this state, the pressure in the pressure reducing chamber D decreases. When the pressure in the pressure reducing chamber D decreases, the diaphragm 21 is displaced to one side by the biasing force of the coil spring 22. At this time, the shaft member 23 also displaces to one side, and the lever member 24 attached to the tip of the shaft member 23 rotates around the pin 25. This rotation causes the pressure reducing valve 26 to move away from the valve seat 27 to open the valve, allowing fuel gas to be introduced into the pressure reducing chamber D.

その後、減圧室Dに燃料ガスが導入されると、減圧室Dの圧力が上昇する。これにより、ダイヤフラム21は、コイルスプリング22の付勢力に抗して他面側に変位する。このとき、軸部材23も他面側に変位し、レバー部材24はピン25を中心として前述とは逆方向に回動する。この回動によって、減圧弁26は弁座27に押圧して燃料ガスの導入を遮断する。以後、二次調整器20は、上記の動作を繰り返しながら、燃料ガスを減圧する。 When fuel gas is then introduced into the pressure reduction chamber D, the pressure in the pressure reduction chamber D rises. As a result, the diaphragm 21 is displaced toward the other side against the biasing force of the coil spring 22. At this time, the shaft member 23 is also displaced toward the other side, and the lever member 24 rotates around the pin 25 in the opposite direction to that described above. This rotation presses the pressure reduction valve 26 against the valve seat 27, blocking the introduction of fuel gas. Thereafter, the secondary regulator 20 reduces the pressure of the fuel gas by repeating the above operations.

さらに、このような二次調整器20は、安全弁吹き出し機構28を備えている。安全弁吹き出し機構28は、スプリング受け座金28aと、安全弁調整スプリング28bと、弁体28cと、弁体受け28dとを有している。 Furthermore, such a secondary regulator 20 is equipped with a safety valve blowing mechanism 28. The safety valve blowing mechanism 28 has a spring receiving washer 28a, a safety valve adjustment spring 28b, a valve body 28c, and a valve body receiver 28d.

スプリング受け座金28aは、軸部材23の大気室A側の先端に設けられている。このスプリング受け座金28aとダイヤフラム21との間には、安全弁調整スプリング28bが介装されている。安全弁調整スプリング28bは、軸部材23の減圧室D側において軸部材23に一体に形成された安全弁の弁体28cを、ダイヤフラム21の一面側に配置した弁体受け28dに当接する方向に常時付勢している。 The spring receiving washer 28a is provided at the tip of the shaft member 23 on the atmospheric chamber A side. A safety valve adjustment spring 28b is interposed between this spring receiving washer 28a and the diaphragm 21. The safety valve adjustment spring 28b constantly biases the valve body 28c of the safety valve formed integrally with the shaft member 23 on the reduced pressure chamber D side of the shaft member 23 in a direction in which it abuts against the valve body receiver 28d arranged on one side of the diaphragm 21.

このような構成であるため、例えば二次調整器20の減圧室Dに異常圧力が掛かると(減圧室Dの圧力が所定圧力を超えると)、軸部材23が他面側に移動しないものの、ダイヤフラム21が他面側に変位する。すなわち、安全弁調整スプリング28bの付勢力に抗してダイヤフラム21が他面側に変位して、弁体28cが弁体受け28dから離れる。この結果、減圧室Dと大気室Aとを連通させ、減圧室Dの圧力を大気室A側に逃がすこととなる。筐体Bには、大気室Aと二次調整器20の外部とを接続する貫通孔Hが形成されていることから、大気室Aに逃がされた圧力、すなわち大気室Aの気体は貫通孔Hを通過して大気に放出される。 Because of this configuration, for example, when abnormal pressure is applied to the pressure reduction chamber D of the secondary regulator 20 (when the pressure in the pressure reduction chamber D exceeds a predetermined pressure), the shaft member 23 does not move to the other side, but the diaphragm 21 displaces to the other side. That is, the diaphragm 21 displaces to the other side against the biasing force of the safety valve adjustment spring 28b, and the valve body 28c moves away from the valve body receiver 28d. As a result, the pressure reduction chamber D and the atmospheric chamber A are connected, and the pressure in the pressure reduction chamber D is released to the atmospheric chamber A side. Since the housing B has a through hole H that connects the atmospheric chamber A to the outside of the secondary regulator 20, the pressure released to the atmospheric chamber A, i.e., the gas in the atmospheric chamber A, passes through the through hole H and is released to the atmosphere.

ここで、このような調整器一体型ガスメータ1を含むガス供給システムについては、完成検査として気密試験が実施される。従来の気密試験では低圧の燃料ガスが流れる低圧部の一部区間(ガス栓の下流側)に8.4kPa以上の試験圧力をかける。一方で、安全弁吹き出し機構28の吹き出し圧力は5.6kPa以上8.4kPa以下である。このため、本実施形態に係る調整器一体型ガスメータ1のように圧力調整器2とガスメータ3との間にガス栓を有しない場合には低圧部に試験圧力をかけようとしても、安全弁吹き出し機構28によって低圧部の圧力が大気室A側に逃がされてしまい、試験圧力まで高めることができなくなってしまう。 Here, for a gas supply system including such a regulator-integrated gas meter 1, an airtightness test is conducted as a final inspection. In a conventional airtightness test, a test pressure of 8.4 kPa or more is applied to a section (downstream of the gas valve) of the low pressure section through which low pressure fuel gas flows. On the other hand, the blowing pressure of the safety valve blowing mechanism 28 is 5.6 kPa or more and 8.4 kPa or less. For this reason, when there is no gas valve between the pressure regulator 2 and the gas meter 3 as in the regulator-integrated gas meter 1 according to this embodiment, even if test pressure is applied to the low pressure section, the pressure of the low pressure section is released to the atmospheric chamber A by the safety valve blowing mechanism 28, and it becomes impossible to increase the pressure to the test pressure.

そこで、本実施形態に係る調整器一体型ガスメータ1は、貫通孔Hに弁機構30を備えている。図3は、図2に示した弁機構30の拡大図であり、(a)は弁開状態を示し、(b)は弁閉状態を示している。 The regulator-integrated gas meter 1 according to this embodiment is therefore provided with a valve mechanism 30 in the through hole H. Figure 3 is an enlarged view of the valve mechanism 30 shown in Figure 2, where (a) shows the valve open state and (b) shows the valve closed state.

図3(a)及び図3(b)に示すように、弁機構30は、外力が付与されていない状態(筐体Bの外側方向に引っ張られていない状態)で貫通孔Hを開放し、外力が付与された状態(筐体Bの外側方向に引っ張られた状態)で貫通孔Hを閉塞するものである。この弁機構30は、弁体31と、弁座32と、スプリング33と、操作部34とを備えている。 As shown in Figures 3(a) and 3(b), the valve mechanism 30 opens the through hole H when no external force is applied (when not pulled toward the outside of the housing B), and closes the through hole H when an external force is applied (when pulled toward the outside of the housing B). This valve mechanism 30 includes a valve body 31, a valve seat 32, a spring 33, and an operating part 34.

弁体31は、断面視して略T字形状となる部材である。この弁体31は、弁座32側に突出する突起部31aを備えている。弁座32は、ゴムパッキン等を有し、弁体31が押圧接触及び離間可能に設けられている。弁体31が弁座32に押圧接触した場合には貫通孔Hが閉塞し、弁体31が弁座32から離間した場合には貫通孔Hが開放される。 The valve body 31 is a member that is substantially T-shaped in cross section. The valve body 31 has a protrusion 31a that protrudes toward the valve seat 32. The valve seat 32 has a rubber packing or the like, and the valve body 31 is provided so that it can be pressed into contact with and separated from the valve seat 32. When the valve body 31 is pressed into contact with the valve seat 32, the through hole H is closed, and when the valve body 31 is separated from the valve seat 32, the through hole H is opened.

スプリング33は、弁体31を弁座32から離れる方向に付勢するものである。操作部34は、断面視して略T字形状となる部材であって、筐体Bの外側に露出しており、試験作業員によりスプリング33を圧縮するように引っ張り操作が可能なものである。このような構成であるため、操作部34を筐体Bの外側方向に引っ張るとスプリング33を圧縮させて弁体31を弁座32に押圧接触させることができる。これにより、貫通孔Hを閉塞することができる。一方、操作部34を筐体Bの外側方向に引っ張ることがなく外力が付与されていない場合には、スプリング33の付勢力によって弁体31を弁座32から離間させることができる。これにより、貫通孔Hを開放することができる。 The spring 33 biases the valve body 31 in a direction away from the valve seat 32. The operating part 34 is a member that is roughly T-shaped in cross section, is exposed to the outside of the housing B, and can be pulled by a test operator to compress the spring 33. With this configuration, when the operating part 34 is pulled toward the outside of the housing B, the spring 33 is compressed and the valve body 31 is pressed into contact with the valve seat 32. This makes it possible to close the through hole H. On the other hand, when the operating part 34 is not pulled toward the outside of the housing B and no external force is applied, the biasing force of the spring 33 can move the valve body 31 away from the valve seat 32. This makes it possible to open the through hole H.

特に、本実施形態に係る調整器一体型ガスメータ1は、貫通孔Hを閉塞することができるため、気密試験時において大気室Aを外部と遮断することができる。この結果、安全弁吹き出し機構28が作動して減圧室Dの圧力が大気室Aに逃がされたとしても、大気室Aの圧力が高まることとなり、試験圧力まで高めることができる。 In particular, the regulator-integrated gas meter 1 according to this embodiment can close the through hole H, so that the atmospheric chamber A can be isolated from the outside during an airtight test. As a result, even if the safety valve blow-out mechanism 28 is activated and the pressure in the reduced pressure chamber D is released to the atmospheric chamber A, the pressure in the atmospheric chamber A increases and can be increased to the test pressure.

次に、図4~図8を参照して本実施形態に係る調整器一体型ガスメータ1の気密試験方法について説明する。図4~図8は、本実施形態に係る調整器一体型ガスメータ1の気密試験方法を示す工程図である。 Next, the airtightness test method for the regulator-integrated gas meter 1 according to this embodiment will be described with reference to Figures 4 to 8. Figures 4 to 8 are process diagrams showing the airtightness test method for the regulator-integrated gas meter 1 according to this embodiment.

まず、図4に示すように試験作業員は、弁機構30の操作部34を引っ張り、弁体31を弁座32に押圧接触させる。次いで、図5に示すように低圧部を試験圧力まで加圧する。この加圧過程においては、まず、減圧室Dの圧力が高まっていき、その後安全弁吹き出し機構28が作動して減圧室Dと大気室Aとが連通することとなる。大気室Aでは貫通孔Hが閉塞されていることから、大気室Aについても圧力が高まっていく。 First, as shown in FIG. 4, the test operator pulls the operating part 34 of the valve mechanism 30, pressing the valve body 31 into contact with the valve seat 32. Next, as shown in FIG. 5, the low pressure part is pressurized to the test pressure. In this pressurization process, the pressure in the reduced pressure chamber D increases first, and then the safety valve blowing mechanism 28 operates, connecting the reduced pressure chamber D to the atmospheric chamber A. Since the through hole H in the atmospheric chamber A is blocked, the pressure in the atmospheric chamber A also increases.

その後、図6に示すように、大気室Aの圧力が規定圧力(少なくとも大気圧を超える圧力)以上となると、大気室Aの圧力によって弁体31を弁座32に押し付ける状態が維持される。すなわち、貫通孔Hの閉塞状態が維持され、試験作業員は、操作部34を引っ張る必要がなくなる。 After that, as shown in FIG. 6, when the pressure in the atmospheric chamber A reaches or exceeds a specified pressure (a pressure at least exceeding atmospheric pressure), the pressure in the atmospheric chamber A keeps the valve body 31 pressed against the valve seat 32. In other words, the through hole H remains closed, and the test operator no longer needs to pull the operating part 34.

その後、低圧部が試験圧力に達して気密試験が実施される。ここで、図7に示す状態においては、減圧室Dと大気室Aとの圧力差が小さくなることから、安全弁吹き出し機構28が非作動となり、減圧室Dと大気室Aとの連通状態が解除される。 Then, the low pressure section reaches the test pressure and an airtight test is carried out. Here, in the state shown in FIG. 7, the pressure difference between the reduced pressure chamber D and the atmospheric chamber A becomes small, so the safety valve blowing mechanism 28 is deactivated and the communication between the reduced pressure chamber D and the atmospheric chamber A is released.

その後、気密試験が完了すると、低圧部の圧力が抜かれることとなる。ここで、大気室Aは圧力が高い状態であるため、ダイヤフラム21は一面側に変位することとなる。この変位により大気室Aの圧力が低下することとなり、スプリング33の付勢力によって弁体31は弁座32から離れる。すなわち、弁機構30については、気密試験の開始時に外力が付与されて貫通孔Hを閉塞し、大気室Aの圧力が閉塞状態を維持する圧力まで高まった後は操作を要することなく、試験終了時にも操作を要することなく開放状態に移行することとなる。 After that, when the airtightness test is completed, the pressure in the low pressure section is released. At this time, the atmospheric chamber A is in a high pressure state, so the diaphragm 21 is displaced to one side. This displacement reduces the pressure in the atmospheric chamber A, and the valve body 31 is moved away from the valve seat 32 by the biasing force of the spring 33. In other words, the valve mechanism 30 is applied with an external force at the start of the airtightness test to close the through hole H, and after the pressure in the atmospheric chamber A has increased to a pressure that maintains the closed state, no operation is required, and when the test is completed, the valve mechanism 30 transitions to an open state without any operation being required.

このようにして、本実施形態に係る調整器一体型ガスメータ1によれば、大気室Aと圧力調整器2の外部とを接続する貫通孔Hに設けられ、外力が付与されていない状態において貫通孔Hを開放し、外力が付与された状態において貫通孔Hを閉塞する弁機構30を備える。このため、例えば試験作業員が弁機構30を操作することで貫通孔Hを閉塞することができる。この閉塞状態においては大気室Aと外部とが連通しないことから、安全弁吹き出し機構28が作動しても減圧室Dの気体が圧力調整器2の外部まで放出されず、ガス栓を設けることなく圧力調整器2の内部を含んで低圧部を試験圧力まで高めることができる。従って、全長が延びてしまう事態を抑制すると共に、低圧部を試験圧力まで高めることができる。 In this way, the regulator-integrated gas meter 1 according to this embodiment is provided with a valve mechanism 30 that is provided in the through hole H that connects the atmospheric chamber A and the outside of the pressure regulator 2, and opens the through hole H when no external force is applied, and closes the through hole H when an external force is applied. Therefore, for example, a test operator can close the through hole H by operating the valve mechanism 30. In this closed state, the atmospheric chamber A does not communicate with the outside, so even if the safety valve blowing mechanism 28 is activated, the gas in the reduced pressure chamber D is not released to the outside of the pressure regulator 2, and the low pressure section, including the inside of the pressure regulator 2, can be increased to the test pressure without providing a gas plug. Therefore, the overall length is prevented from increasing, and the low pressure section can be increased to the test pressure.

また、弁機構30は、安全弁吹き出し機構28により減圧室Dと大気室Aとが連通し大気室Aが大気圧を超える規定圧力以上となる状態において、大気室Aの圧力が外力として作用して貫通孔Hを閉塞した状態を維持する。このため、スプリング33に適切なものを用いて規定圧力を適正化することで、気密試験の試験圧力を利用して弁機構30が貫通孔Hを閉塞した状態に維持することができる。これにより、貫通孔Hの閉塞状態を維持するために、初期的には試験作業員が弁機構30を操作する必要があっても、気密試験の途中からは弁機構30を操作する必要がなくなり、気密試験の簡易化に寄与することができる。 In addition, when the pressure reduction chamber D and the atmospheric chamber A are connected by the safety valve blowing mechanism 28 and the atmospheric chamber A is at or above a specified pressure exceeding atmospheric pressure, the pressure in the atmospheric chamber A acts as an external force to keep the through hole H closed. Therefore, by optimizing the specified pressure using an appropriate spring 33, the valve mechanism 30 can keep the through hole H closed by using the test pressure of the airtightness test. As a result, even if the test worker needs to operate the valve mechanism 30 initially to keep the through hole H closed, it becomes unnecessary to operate the valve mechanism 30 midway through the airtightness test, which contributes to simplifying the airtightness test.

以上、実施形態に基づき本発明を説明したが、本発明は上記実施形態に限られるものではなく、本発明の趣旨を逸脱しない範囲で、変更を加えてもよいし、可能な範囲で適宜他の技術を組み合わせてもよい。 The present invention has been described above based on the embodiments, but the present invention is not limited to the above embodiments, and modifications may be made without departing from the spirit of the present invention, and other technologies may be appropriately combined to the extent possible.

例えば本実施形態においては調整器一体型ガスメータ1を例に説明したが、これに限らず、本発明は、例えばガスメータ3と分離されて、後にガスメータ3と一体化されて調整器一体型ガスメータ1とするための圧力調整器2に適用されてもよい。 For example, in this embodiment, the regulator-integrated gas meter 1 has been described as an example, but the present invention is not limited to this, and may be applied to, for example, a pressure regulator 2 that is separated from a gas meter 3 and then later integrated with the gas meter 3 to form a regulator-integrated gas meter 1.

また、調整器一体型ガスメータ1については、圧力調整器2とガスメータ3との間に短めの配管を備えていてもよいし、直接接続されていてもよい。 In addition, the regulator-integrated gas meter 1 may have a short pipe between the pressure regulator 2 and the gas meter 3, or they may be directly connected.

1 :調整器一体型ガスメータ
2 :圧力調整器
3 :ガスメータ
3a :表示パネル
10 :一次調整器
10a :入口部
10b :切替レバー
20 :二次調整器
20a :出口部(出口流路)
21 :ダイヤフラム
22 :コイルスプリング
23 :軸部材
24 :レバー部材
25 :ピン
26 :減圧弁
27 :弁座
28 :安全弁吹き出し機構
28a :スプリング受け座金
28b :安全弁調整スプリング
28c :弁体
28d :弁体受け
30 :弁機構
31 :弁体
31a :突起部
32 :弁座
33 :スプリング
34 :操作部
A :大気室
B :筐体
D :減圧室(ガス室)
H :貫通孔
1: Regulator-integrated gas meter 2: Pressure regulator 3: Gas meter 3a: Display panel 10: Primary regulator 10a: Inlet section 10b: Switch lever 20: Secondary regulator 20a: Outlet section (outlet flow path)
21: Diaphragm 22: Coil spring 23: Shaft member 24: Lever member 25: Pin 26: Pressure reducing valve 27: Valve seat 28: Safety valve blowing mechanism 28a: Spring receiving washer 28b: Safety valve adjustment spring 28c: Valve body 28d: Valve body receiving 30: Valve mechanism 31: Valve body 31a: Projection 32: Valve seat 33: Spring 34: Operation unit A: Atmospheric chamber B: Housing D: Pressure reducing chamber (gas chamber)
H: Through hole

Claims (3)

ガス容器からの高圧ガスを減圧する圧力調整器と、前記圧力調整器の出口流路に接続されるガスメータと、を備えた調整器一体型ガスメータであって、
前記圧力調整器は、
他面が大気室からの圧力を受け、一面が燃料ガス側となるガス室からの圧力を受けるダイヤフラムと、
前記ダイヤフラムの一面側及び他面側への変位に応じて前記ガス室への燃料ガスの導入量を制御する減圧弁と、
前記ガス室の圧力が所定圧力を超える場合に前記ガス室内と前記大気室とを連通させて前記ガス室の圧力を前記大気室側に逃がす安全弁吹き出し機構と、
前記大気室と前記圧力調整器の外部とを接続する貫通孔に設けられ、操作部への操作がされていない状態において前記貫通孔を開放し、前記操作部への操作がされた状態において前記貫通孔を閉塞する弁機構と、を備える
ことを特徴とする調整器一体型ガスメータ。
A regulator-integrated gas meter including a pressure regulator that reduces the pressure of a high-pressure gas from a gas container and a gas meter that is connected to an outlet flow path of the pressure regulator,
The pressure regulator comprises:
A diaphragm having one side receiving pressure from the gas chamber which is the fuel gas side and another side receiving pressure from the atmospheric chamber;
a pressure reducing valve for controlling an amount of fuel gas introduced into the gas chamber in response to displacement of the diaphragm toward one side and the other side;
a safety valve blowout mechanism that, when the pressure in the gas chamber exceeds a predetermined pressure, communicates between the gas chamber and the atmospheric chamber to release the pressure in the gas chamber to the atmospheric chamber;
a valve mechanism that is provided in a through hole that connects the atmospheric chamber with the outside of the pressure regulator, the valve mechanism opening the through hole when no operation is performed on an operating unit , and closing the through hole when an operation is performed on the operating unit .
前記弁機構は、前記安全弁吹き出し機構により前記ガス室と前記大気室とが連通し前記大気室が大気圧を超える規定圧力以上となる状態において、前記操作部への操作がなくとも前記大気室の圧力によって前記貫通孔を閉塞した状態を維持する
ことを特徴とする請求項1に記載の調整器一体型ガスメータ。
2. The gas meter with integrated regulator according to claim 1, wherein the valve mechanism maintains a state in which the through-hole is closed by the pressure of the atmospheric chamber even without operation of the operating unit , when the gas chamber and the atmospheric chamber are connected by the safety valve blowing mechanism and the atmospheric chamber is at or above a specified pressure exceeding atmospheric pressure.
ガス容器からの高圧ガスを減圧すると共に出口流路がガスメータに接続される圧力調整器であって、
他面が大気室からの圧力を受け、一面が燃料ガス側となるガス室からの圧力を受けるダイヤフラムと、
前記ダイヤフラムの一面側及び他面側への変位に応じて前記ガス室への燃料ガスの導入量を制御する減圧弁と、
前記ガス室の圧力が所定圧力を超える場合に前記ガス室内と前記大気室とを連通させて前記ガス室の圧力を前記大気室側に逃がす安全弁吹き出し機構と、
前記大気室と前記圧力調整器の外部とを接続する貫通孔に設けられ、操作部への操作がされていない状態において前記貫通孔を開放し、前記操作部への操作がされた状態において前記貫通孔を閉塞する弁機構と、
を備えることを特徴とする圧力調整器。
A pressure regulator that reduces the pressure of high-pressure gas from a gas container and has an outlet flow path connected to a gas meter,
A diaphragm having one side receiving pressure from the gas chamber which is the fuel gas side and another side receiving pressure from the atmospheric chamber;
a pressure reducing valve for controlling an amount of fuel gas introduced into the gas chamber in response to displacement of the diaphragm toward one side and the other side;
a safety valve blowout mechanism that, when the pressure in the gas chamber exceeds a predetermined pressure, communicates between the gas chamber and the atmospheric chamber to release the pressure in the gas chamber to the atmospheric chamber;
a valve mechanism that is provided in a through hole that connects the atmospheric chamber and the outside of the pressure regulator, the valve mechanism opening the through hole when an operation unit is not being operated and closing the through hole when the operation unit is being operated ;
A pressure regulator comprising:
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001147724A (en) 1999-11-22 2001-05-29 Kane Kogyo Kk Pressure reducing valve
JP2018189568A (en) 2017-05-10 2018-11-29 矢崎エナジーシステム株式会社 Adjuster integrated gas meter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001147724A (en) 1999-11-22 2001-05-29 Kane Kogyo Kk Pressure reducing valve
JP2018189568A (en) 2017-05-10 2018-11-29 矢崎エナジーシステム株式会社 Adjuster integrated gas meter

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