JP2001108569A - Method for measuring content volume of gas supply line and leak volume, and device therefor - Google Patents
Method for measuring content volume of gas supply line and leak volume, and device thereforInfo
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- JP2001108569A JP2001108569A JP29124999A JP29124999A JP2001108569A JP 2001108569 A JP2001108569 A JP 2001108569A JP 29124999 A JP29124999 A JP 29124999A JP 29124999 A JP29124999 A JP 29124999A JP 2001108569 A JP2001108569 A JP 2001108569A
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- gas
- gas supply
- supply line
- pressure
- measurement
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、ガス本管に供給
用ガバナーまたは逆止弁を介して需要家群に延設された
ガス導管と該ガス導管から各需要家に接続された引込み
管からなるガス供給管路の内容積・ガス漏洩量測定法お
よびその装置に関する。The present invention relates to a gas pipe extending to a group of customers via a supply governor or a check valve to a gas main pipe, and a lead-in pipe connected from the gas pipe to each customer. The present invention relates to a method and apparatus for measuring the internal volume of a gas supply pipe and the amount of gas leakage.
【０００２】[0002]
【従来の技術】例えば、都市ガスは、この発明の一実施
例を示す図１を参照して説明すると、幹線道路に埋設さ
れたガス本管１から供給用ガバナー２を介して需要家群
に向けてガス導管３が延設され、このガス導管３から開
閉弁５、ガスメータ６などを介して引込み管４を接続し
てガス供給管路（以下、単にガス供給管路という）が形
成されて各需要家にガスが供給される。2. Description of the Related Art For example, referring to FIG. 1 showing an embodiment of the present invention, city gas is supplied to a group of consumers from a gas main 1 buried on a main road via a supply governor 2. A gas supply pipe (hereinafter, simply referred to as a gas supply pipe) is formed by connecting a drawing pipe 4 from the gas pipe 3 via an on-off valve 5, a gas meter 6, and the like. Gas is supplied to each customer.
【０００３】このガス供給システムにおいて、ガス本管
１は勿論のこと、ガス導管３および引込み管４からなる
ガス供給管路７において、ガス洩れが生じると、ガス爆
発などの大事故を招く恐れがあり、次のようなガス洩れ
検出方法および装置が採用されている。In this gas supply system, if a gas leaks not only in the gas main pipe 1 but also in the gas supply pipe line 7 composed of the gas conduit 3 and the lead-in pipe 4, a large accident such as a gas explosion may occur. Yes, the following gas leak detection method and device are employed.
【０００４】その１は、道路下に埋設されたガス導管３
の真上に深さ５０ｃｍ程度の穴を穿き、その穴に吸引管
を挿入して、その部分の空気をガス検知器又は臭気で漏
洩の有無を検査するボーリング法。その２は、水素炎イ
オン化式ガス検知器等を用いて、路線上の地表近くの空
気を吸引して漏洩の有無を測定する方法。その３は、被
測定部分へのガスの流入を遮断した後、所定の時間の圧
力を測定して、その圧力の経時変化により漏洩の有無を
検査する測定対象の管路遮断法などである。The first is a gas conduit 3 buried under the road.
Boring method in which a hole with a depth of about 50 cm is drilled directly above the hole, a suction tube is inserted into the hole, and the air in that portion is inspected for leakage with a gas detector or odor. The second method is to measure the presence or absence of leakage by using a flame ionization gas detector or the like to suck air near the ground surface on the route. The third method is a method for shutting off a gas flowing into a portion to be measured, and then measuring a pressure for a predetermined time, and inspecting the presence / absence of a leak based on a change with time of the pressure.
【０００５】[0005]
【発明が解決しようとする課題】ボーリング法は、約５
ｍおきに穴を穿くため、道路に傷が付くと共に大変な労
力と経費が必要であり、場所によっては穴を穿つことが
できないところもある。The boring method requires about 5
Drilling holes every m will damage roads and require great effort and expense. In some places, holes cannot be drilled.
【０００６】水素炎イオン化式ガス検知器等を使用する
方法は、天然ガスのように空気より軽いガスには採用で
きるが、ＬＰＧのように重いガスには使用できない。ま
た、人間が入れない場所、例えば床下、パイプシャフト
等の建家内の配管においては採用することができない。A method using a flame ionization type gas detector can be used for a gas lighter than air, such as natural gas, but cannot be used for a heavy gas such as LPG. Further, it cannot be used in a place where humans cannot enter, for example, a pipe in a building such as under the floor or a pipe shaft.
【０００７】また、管路遮断法は、ガス供給を停止した
上で実施するものであるから、測定中はガスの供給サー
ビスができなくなって需要家に不便をかける。また、大
規模な集団供給設備ではガスの停止と再開栓に膨大な手
数がかかるばかりか、特に開栓時においてガス事故防止
のための安全確認に細心の注意を払う必要がある。[0007] Further, since the pipe cutoff method is performed after the gas supply is stopped, the gas supply service cannot be performed during the measurement, causing inconvenience to the customer. In addition, in a large-scale collective supply facility, it is not only enormous trouble to stop and reopen the gas, but also it is necessary to pay close attention to safety confirmation to prevent gas accidents, especially when the gas is opened.
【０００８】この発明は、都市ガス等のガス供給管路に
おける漏洩有無の検査は勿論のこと、漏洩量およびガス
供給管路の内容積を深夜等のガスを消費しない時間帯を
利用して、また、需要家にガス供給を停止する事なく無
人で自動的に測定し得るようにすることを課題とする。According to the present invention, the amount of leakage and the inner volume of the gas supply line are determined not only by checking the presence or absence of leakage in the gas supply line such as city gas, but also by utilizing a time period during which gas is not consumed, such as at midnight. It is another object of the present invention to be able to perform measurement automatically and unattended without stopping gas supply to a customer.
【０００９】[0009]
【課題を解決するための手段】上記課題を解決するため
に、所定圧力に調整されたガスが供給されるガス供給管
路に、上記所定圧力よりより僅かに高い圧力の測定用ガ
スａを強制流入する直前のガス供給管路内の圧力Ｐ1 を
測定して、上記測定用ガスａを定流量（ｌ／sec ）でｔ
1 時間強制流入させて測定用ガスの供給を閉じ、そのと
きのガス供給管路内の圧力Ｐ2 を測定し、その後ｔ2 時
間経過したときのガス供給管路の内圧Ｐ3 を測定し、こ
れらのデーターを基にガス供給管路の内容積Ｖとガス供
給管路から洩れたガス量Ｑ2 とを演算するようにしたも
のである。In order to solve the above-mentioned problems, a measuring gas a having a pressure slightly higher than the predetermined pressure is forcibly supplied to a gas supply pipe to which a gas adjusted to a predetermined pressure is supplied. The pressure P1 in the gas supply line immediately before the flow is measured, and the measuring gas a is supplied at a constant flow rate (l / sec).
The supply of the measuring gas was closed by forced inflow for 1 hour, the pressure P2 in the gas supply line at that time was measured, and then the internal pressure P3 of the gas supply line after t2 time was measured. Is used to calculate the internal volume V of the gas supply line and the amount Q2 of gas leaked from the gas supply line.
【００１０】上記の如く構成するこの発明によれば、ガ
スの消費が少ない深夜を利用して、需要家へのガスの供
給を停止することなくガス洩れの有無は勿論のこと、洩
れ量およびガス供給管路の内容積の測定までが極めて簡
単に実施できるようになる。According to the present invention configured as described above, it is possible to determine whether or not there is a gas leak, to determine the amount of gas leak, and to determine the amount of gas leak without stopping the supply of gas to the customer at midnight when gas consumption is low. The measurement of the internal volume of the supply line can be performed very easily.
【００１１】[0011]
【発明の実施の形態】この発明の一実施形態としては、
ガス本管１に供給用ガバナー２または逆止弁１８を介し
て需要家群へガス導管３を延設し、このガス導管３から
家庭あるいは商店等の各需要家Ｈに引込み管４が開閉弁
５、ガスメーター６を介して接続されてガス供給管路７
が形成されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is as follows.
A gas pipe 3 is extended from the gas main pipe 1 to a group of consumers via a supply governor 2 or a check valve 18, and a lead-in pipe 4 is opened and closed from the gas pipe 3 to each customer H such as a home or a store. 5. Gas supply line 7 connected via gas meter 6
Are formed.
【００１２】供給用ガバナー２によって所定の圧力に調
整されたガスｂが流入するガス導管３には、上記所定の
圧力より僅かに高い圧力の測定用ガスａが定流量弁２１
を経てｔ1 時間強制流入される。In the gas conduit 3 into which the gas b adjusted to a predetermined pressure by the supply governor 2 flows, a measuring gas a having a pressure slightly higher than the predetermined pressure is supplied to the constant flow valve 21.
Is forcibly flowed in for t1 time.
【００１３】ここで、上記ガス導管３に設けられた圧力
センサー１６によって刻々ガス供給管路７の内圧が測定
され、そのデーターは時計回路を備えたコントローラ１
７に入力される。Here, the internal pressure of the gas supply line 7 is measured every time by a pressure sensor 16 provided in the gas conduit 3, and the data is stored in a controller 1 having a clock circuit.
7 is input.
【００１４】上記コントローラ１７には演算機構２０が
付設され、この演算機構２０に、測定用ガスａの強制流
入開始直前の圧力センサー１６の検出値Ｐ1 、測定用ガ
スａの強制流入時間ｔ1 、測定用ガスａの強制流入停止
直後の圧力センサー１６の検出値Ｐ2 、測定用ガスａの
強制流入停止後の放置時間ｔ2 、その時の圧力センサー
１６の検出値Ｐ3 をもとにガス供給管路７の内容積Ｖと
ガス供給管路７から洩れたガス量Ｑ2 とを演算しその結
果を表示するものである。なお、測定用ガスａの流量
は、定流量弁の設定値（ｌ／sec ）×測定用ガス強制流
入時間ｔ1 で与えられる。The controller 17 is provided with an arithmetic mechanism 20. In this arithmetic mechanism 20, the detection value P1 of the pressure sensor 16 immediately before the start of the forced inflow of the measurement gas a, the forced inflow time t1 of the measurement gas a, the measurement Of the gas supply line 7 based on the detection value P2 of the pressure sensor 16 immediately after the forced inflow of the measuring gas a is stopped, the standing time t2 after the forced inflow of the measuring gas a is stopped, and the detected value P3 of the pressure sensor 16 at that time. It calculates the internal volume V and the amount Q2 of gas leaked from the gas supply line 7, and displays the result. The flow rate of the measuring gas a is given by (set value of the constant flow valve (l / sec) × forced flow time t1 of the measuring gas).
【００１５】ガス導管３へ強制流入する測定用ガスａ
は、高圧のガスボンベ１１（図１，図２）、ガス導管３
の供給用ガバナー２の上流側（図３）あるいはガス本管
１（図４）を供給源とし減圧調整器１２やガバナー２２
を介して導入される。Measurement gas a forcibly flowing into the gas conduit 3
Is a high-pressure gas cylinder 11 (FIGS. 1 and 2) and a gas conduit 3
The upstream side (FIG. 3) of the supply governor 2 of FIG.
Introduced via
【００１６】上記において、定流量弁２１を経て測定用
ガスａをガス導管３に強制流入しても、ガス供給管路７
の内圧（圧力センサーの検出値）が上昇しない場合、コ
ントローラ１７の時計回路から自動開閉弁「閉」の信号
が発せられ、さらに一定時間経過後自動開閉弁「開」の
信号が発せられて上記操作が繰り返される。In the above, even if the measurement gas a is forced into the gas conduit 3 via the constant flow valve 21, the gas supply line 7
If the internal pressure (detected value of the pressure sensor) does not increase, a signal of the automatic opening / closing valve “closed” is issued from the clock circuit of the controller 17, and after a certain period of time, the signal of the automatic opening / closing valve “open” is issued. The operation is repeated.
【００１７】しかし、この操作の繰り返しが続くと測定
用ガスの浪費になるので、繰り返し回数をコントローラ
にカウントさせて（繰り返し時間を計測させてもよい）
設定値を越えると操作をロックすることができ、また、
一定時間後に再開することもできる。However, if this operation is repeated, the gas for measurement is wasted, so the controller counts the number of repetitions (the repetition time may be measured).
If the set value is exceeded, the operation can be locked.
It can be restarted after a certain time.
【００１８】ガス供給管路７の内圧が上がらないのは、
通常、ガスの消費が大きい場合であり、その状態で測定
を繰り返すことは測定用ガスａの浪費になる。従って、
開弁後、一定時間経過してもガス供給管路７の内圧が上
昇しないときは、一旦、自動開閉弁１４を閉じ、ガスの
消費が停まるのを待って（通常、給湯等による一回当た
りのガス消費時間であって１５分程度）再度開弁するよ
うにする。The reason why the internal pressure of the gas supply pipe 7 does not increase is that
Normally, gas consumption is large, and repetition of measurement in that state wastes measurement gas a. Therefore,
If the internal pressure of the gas supply line 7 does not increase even after a certain period of time has elapsed after the valve is opened, the automatic on-off valve 14 is closed once and the gas consumption is stopped (normally, once by hot water supply or the like). (The gas consumption time per contact is about 15 minutes).
【００１９】[0019]
【実施例】次に図１を参照しながら一実施例を説明す
る。幹線道路に埋設されたガス本管１から需要家群に供
給用ガバナー２を介してガス導管３を延設し、このガス
導管３から家庭や商店などの需要家Ｈに開閉弁５、ガス
メータ６などを介して引込み管４が接続されてガス供給
管路７が形成されている。Next, an embodiment will be described with reference to FIG. A gas conduit 3 is extended from a gas main 1 buried on a main road to a group of customers via a supply governor 2 to a group of consumers, and the gas conduit 3 is connected to a consumer H such as a home or a store to open and close a valve 5 and a gas meter 6. The gas supply pipe 7 is formed by connecting the drawing pipe 4 via the like.
【００２０】前記供給用ガバナー２は、逆止弁機能（閉
塞機能）を有してガス導管３からガス本管１への逆流を
阻止しながら、ガス本管１のガスｃを一定値に減圧、例
えば０．１ＭＰａから２．０ＫＰａに減圧・調整されて
ガス導管３に送り込まれ、少なくとも漏洩測定時にはガ
ス消費に支障をきたさない範囲内で、ガス導管３内のガ
スが所要の圧力、例えば１．５〜２．０ＫＰａとなるよ
うに設定される。The supply governor 2 has a check valve function (blocking function) to prevent the gas from flowing back from the gas conduit 3 to the gas main pipe 1 while reducing the gas c in the gas main pipe 1 to a constant value. For example, the pressure in the gas conduit 3 is reduced and adjusted from 0.1 MPa to 2.0 KPa and sent into the gas conduit 3, and the gas in the gas conduit 3 is set to a required pressure, for example, 1 at least within a range that does not hinder gas consumption at the time of leak measurement. It is set to be 0.5 to 2.0 KPa.
【００２１】上記ガス導管３には、測定用ガスボンベ１
１から延びる測定用ガス管１０が減圧調整弁１２、測定
用ガバナー１３、自動開閉弁（電磁弁）１４および定流
量弁２１を介在させて接続されており、ボンベ１１に
は、ガス本管１から供給されるガスｃと同一若しくは燃
焼に支障のない類似ガスａが充填されている。A gas cylinder 1 for measurement is provided in the gas conduit 3.
1 is connected via a pressure reducing valve 12, a measuring governor 13, an automatic opening / closing valve (solenoid valve) 14, and a constant flow valve 21. The gas main pipe 1 is connected to the cylinder 11. Filled with the same gas a that is the same as the gas c supplied from the same or does not hinder combustion.
【００２２】自動開閉弁１４が開かれると、ボンベ１１
内の測定用ガスａは、減圧調整弁１２により一定値、例
えば１０ＫＰａに減圧され、さらに測定用ガバナー１３
によりガス消費に支障のない圧力、例えば２．５ＫＰａ
に調整されてガス導管３に強制流入される。上記のよう
に測定用ガスａの圧力は、ガス本管１からの供給用ガバ
ナー２により圧力調整されて供給されるガスｂより高く
設定されているため、ガス導管３の内圧は供給ガスｂよ
り高い圧力となる。When the automatic on-off valve 14 is opened, the cylinder 11
The measurement gas a in the chamber is reduced in pressure to a constant value, for example, 10 KPa by the pressure reducing valve 12, and is further reduced to the measurement governor 13.
Pressure that does not hinder gas consumption, for example, 2.5 KPa
And forcedly flows into the gas conduit 3. As described above, the pressure of the measurement gas a is set to be higher than the gas b supplied by adjusting the pressure by the supply governor 2 from the gas main pipe 1, so that the internal pressure of the gas conduit 3 is higher than the supply gas b. High pressure.
【００２３】また、ガス導管３には外部出力可能な圧力
センサーが設けられ、その出力端子は時計回路を有する
コントローラ１７に接続され、該コントローラ１７には
演算表示装置２０が接続されている。なお、上記圧力セ
ンサー１６の出力を圧力記録装置１５に取り入れ時々刻
々記録することができる。The gas conduit 3 is provided with a pressure sensor capable of external output, and its output terminal is connected to a controller 17 having a clock circuit, and the controller 17 is connected to an operation display device 20. The output of the pressure sensor 16 can be taken into the pressure recording device 15 and recorded every moment.
【００２４】また、ガス導管３には、圧力スイッチ１
６’を設けその出力を時計回路付きコントローラ１７を
経由して自動開閉弁１４が開閉するようにすることもで
きる。The gas conduit 3 has a pressure switch 1
6 'may be provided so that the output of the automatic opening / closing valve 14 is opened and closed via the controller 17 with a clock circuit.
【００２５】この場合、圧力スイッチの作動圧力（Ｐ2
に相当する）は、例えば２．４５ＫＰａに設定され、圧
力スイッチの発信により自動開閉弁が閉じ、ガス供給管
路７に洩れのある場合、あるいはガスが消費されている
ときはガス供給管路７の内圧が徐々に低下し、一定時間
後にＰ3 の圧力となる。なお、Ｐ3 の圧力は上記時間設
定を長くすることにより、測定用ガスを強制流入する直
前の圧力Ｐ1 と同一にすることができるが測定に要する
時間長くなるので、測定精度を考慮しながら適当に短い
時間を設定するとよい。In this case, the operating pressure of the pressure switch (P2
Is set to, for example, 2.45 KPa, and when the automatic on-off valve is closed by transmission of the pressure switch and the gas supply line 7 is leaked, or when the gas is consumed, the gas supply line 7 The internal pressure gradually decreases to P3 after a certain time. The pressure of P3 can be made equal to the pressure P1 immediately before the gas for measurement is forcibly introduced by lengthening the above-mentioned time setting, but the time required for the measurement becomes longer. Set a short time.
【００２６】コントローラ１７は、圧力センサー１６の
出力信号または圧力スイッチ１６’の出力を受け取り、
時計回路を経て自動開閉弁１４に「開」「閉」の信号を
発信する。なお、作動圧力設定機能を有する圧力センサ
ーを採用すれば圧力スイッチを省略できる。The controller 17 receives the output signal of the pressure sensor 16 or the output of the pressure switch 16 ',
An "open" and "close" signal is transmitted to the automatic on-off valve 14 via a clock circuit. If a pressure sensor having an operating pressure setting function is adopted, the pressure switch can be omitted.
【００２７】上記実施例では、自動開閉弁１４を測定用
ガバナー１３の出口側に設置しているが、測定用ガバナ
ー１３の直近であればその上流側に設けることもでき
る。In the above embodiment, the automatic opening / closing valve 14 is provided on the outlet side of the measuring governor 13, but may be provided on the upstream side of the measuring governor 13 if it is in the immediate vicinity.
【００２８】上記実施例のコントローラ１７を始動する
と、測定用ガス流入直前のガス供給管路７の内圧Ｐ1 が
測定され、自動開閉弁に「開」の指令が出され、同時に
時計回路が時間計測を開始し、ｔ1 時間経過すると自動
開閉弁に「閉」の指令が出され、同時に圧力センサー１
６の出力Ｐ2 がコントローラ１７を経て演算表示装置に
記憶される。When the controller 17 of the above embodiment is started, the internal pressure P1 of the gas supply line 7 immediately before the flow of the measuring gas is measured, and an "open" command is issued to the automatic opening / closing valve. Is started, and when the time t1 has elapsed, a command to close the automatic on-off valve is issued, and at the same time, the pressure sensor 1
6 is stored in the arithmetic and display unit via the controller 17.
【００２９】次いで時間回路がリセットされ時間回路が
再始動し（ｔ1 とｔ2 を設定できる時計回路の場合はリ
セット不要）、設定された時間ｔ2 が経過すると、その
時点の圧力センサー１６の出力Ｐ3 （ガス供給管路７の
内圧）が計測されてコントローラ１７を経て演算表示装
置に記憶される。Next, the time circuit is reset and the time circuit is restarted (in the case of a clock circuit capable of setting t1 and t2, no reset is necessary). When the set time t2 elapses, the output P3 of the pressure sensor 16 at that time (P3) The internal pressure of the gas supply line 7 is measured and stored in the arithmetic and display unit via the controller 17.
【００３０】これらの測定データーを基に演算機構２０
により次式に従って演算され、公知の手段により表示さ
れる。なお、上記は時間優先で測定をプログラムしてい
るが、圧力優先でプログラムすることもできる。なお、
この場合測定用ガスａの圧力を高く設定してもよい。Based on these measurement data, the arithmetic mechanism 20
Is calculated according to the following equation, and is displayed by a known means. In the above description, the measurement is programmed with priority on time, but the measurement can be programmed with priority on pressure. In addition,
In this case, the pressure of the measurement gas a may be set high.
【００３１】[0031]
【数１】 (Equation 1)
【００３２】式中の記号は次の通りである。 Ｐ1 ：定流量弁（自動開閉弁）「開」直前のガス供給管
路の内圧。 Ｐ2 ：定流量弁（自動開閉弁）「閉」直後のガス供給管
路の内圧。 Ｐ3 ：定流量弁（自動開閉弁）「閉」からｔ2 時間後の
ガス供給管路の内圧。 ｔ1 ：定流量弁（自動開閉弁）が開いている時間。 ｔ2 ：定流量弁（自動開閉弁）が閉じた後の設定（任
意）経過時間。 Ｑ1 ：ガス導管に強制流入された測定用ガスの流量（定
流量弁の設定値（ｌ／sec ）×強制流入時間ｔ1 Ｑ2 ：ガス供給管路からのガスの漏洩量。 Ｖ ：ガス供給管路の内容積。The symbols in the formula are as follows. P1: Internal pressure of gas supply line just before opening of constant flow valve (automatic on-off valve). P2: The internal pressure of the gas supply line immediately after closing the constant flow valve (automatic on-off valve). P3: The internal pressure of the gas supply line t2 hours after the constant flow valve (automatic on-off valve) "close". t1: Time during which the constant flow valve (automatic on-off valve) is open. t2: Set (arbitrary) elapsed time after the constant flow valve (automatic on-off valve) is closed. Q1: flow rate of the measurement gas forcedly flowing into the gas conduit (set value of the constant flow valve (l / sec) × forced flow time t1) Q2: amount of gas leaked from the gas supply pipe V: gas supply pipe Inner volume.
【００３３】以上から、ＶおよびＱ2 以外は既知( 設定
値または測定値) である。従って、式からガス供給管
路の内容積が、式からガス漏洩量が算出（演算）する
ことができる。From the above, it is known (set value or measured value) except for V and Q2. Therefore, the internal volume of the gas supply pipe can be calculated (calculated) from the equation, and the gas leakage amount can be calculated (calculated) from the equation.
【００３４】なお、測定用ガスａをｔ1 時間強制流入し
ても圧力センサーの出力が上がらない（ガス供給管路７
の内圧が上昇しない）ときは、それまでのコントローラ
の指令はキャンセルされて最初からの操作が繰り返され
る。It should be noted that the output of the pressure sensor does not increase even if the measuring gas a is forcibly introduced for the time t1 (the gas supply line 7).
When the internal pressure does not increase), the previous command from the controller is canceled and the operation from the beginning is repeated.
【００３５】この発明によってガス供給管路７の内容
積、漏洩量を測定しているときに、測定用ガスの供給量
以上にガスが消費されている場合は、供給用ガバナー２
から自動的にガスが供給されるので需要家へのガスの供
給は支障なく続けられる。When measuring the internal volume and the leakage amount of the gas supply pipe 7 according to the present invention, if the gas is consumed more than the supply amount of the measurement gas, the supply governor 2
Since the gas is automatically supplied from the customer, the gas supply to the customer can be continued without any trouble.
【００３６】この測定において、コントローラ１７にタ
イマーを内蔵して、測定時間帯をガスの消費が最も少な
い時間帯（通常、深夜から未明にかけての時間帯）に設
定しすれば、測定用ガスａの消費を減らすことができ
る。In this measurement, a timer is built in the controller 17 and the measurement time zone is set to a time zone in which gas consumption is the least (usually a time zone from midnight to dawn). Consumption can be reduced.
【００３７】上記本管１のガス圧が上記ガス供給管路７
の内圧と同一の場合、ガス導管３の供給用ガバナー２に
代えて、図２に示すように、逆止弁１８を採用すること
ができ、さらに、その逆止弁１８に代えて圧力損失の小
さい逆止機能を有する大口径のガバナーを使用すること
もできる。When the gas pressure in the main pipe 1 is equal to the gas supply pipe 7
In the case of the same internal pressure as shown in FIG. 2, a check valve 18 can be employed instead of the supply governor 2 of the gas conduit 3 as shown in FIG. Large diameter governors with small non-return features can also be used.
【００３８】また、供給用ガバナー２の上流側の圧力
（ガス本管１のガス圧）が所定の圧力（ガスｂの圧力）
以上あれば、図３に示すように、その上流側の供給ガス
ｃをガバナー２２を介して測定用ガスａとして導入する
ことができる。The pressure on the upstream side of the supply governor 2 (gas pressure of the gas main pipe 1) is a predetermined pressure (pressure of gas b).
With the above, as shown in FIG. 3, the supply gas c on the upstream side can be introduced as the measurement gas a via the governor 22.
【００３９】さらに、図４に示すように、供給ガスｃの
圧力が所定の圧力（ガスｂの圧力）と同等の場合は、ブ
ースタ１９を介し昇圧して測定用ガスａとして使用する
ことができ、また、図１において、測定用ガスボンベ１
１に代えて移動式ガス発生設備を採用することもでき
る。Further, as shown in FIG. 4, when the pressure of the supply gas c is equal to a predetermined pressure (the pressure of the gas b), the pressure can be increased through the booster 19 and used as the measurement gas a. In addition, in FIG.
In place of 1, a mobile gas generating facility can be employed.
【００４０】また、上記各実施例に於いて圧力センサー
１６および圧力スイッチ１６’は測定用ガス管１０の自
動開閉弁１４からガス導管３までの間に設置してもよ
い。Further, in each of the above embodiments, the pressure sensor 16 and the pressure switch 16 ′ may be provided between the automatic opening / closing valve 14 of the measuring gas pipe 10 and the gas conduit 3.
【００４１】[0041]
【発明の効果】以上説明したように本発明は、需要家に
対するガスの供給を停止しすることなく、ガス供給管路
の内容積と漏洩量の測定を可能にし、コントローラに作
動指令のプログラムを入力しておけば任意の時間帯、例
えばガスの消費の少ない深夜に無人で計測することがで
き、ガスの消費が多い場合には、その状態を判断して操
作をロックして測定用ガスの浪費を抑えることができ、
ロックを外して操作を再開することもできる。As described above, the present invention makes it possible to measure the internal volume and the amount of leakage of the gas supply line without stopping the supply of gas to the customer, and to program the controller with an operation command. If you input it, you can measure unattended at any time, for example, late at night when gas consumption is low, and if gas consumption is high, judge the state and lock the operation to stop the measurement gas. Waste can be reduced,
The operation can be resumed by releasing the lock.
【図１】一実施例のガス測定回路図FIG. 1 is a diagram of a gas measurement circuit according to one embodiment.
【図２】他の実施例のガス測定回路図FIG. 2 is a gas measurement circuit diagram of another embodiment.
【図３】他の実施例のガス測定回路図FIG. 3 is a gas measurement circuit diagram of another embodiment.
【図４】他の実施例のガス測定回路図FIG. 4 is a gas measurement circuit diagram of another embodiment.
【図５】測定用ガス漏洩曲線図FIG. 5 is a diagram of a gas leakage curve for measurement.
１ ガス本管 ２ 供給用ガバナー ３ ガス導管 ４ 引込み管 ５ 開閉弁 ６ ガスメータ ７ ガス供給管路 １０ 測定用ガス管 １１ 測定用ガスボンベ １２ 減圧調整弁 １３ 測定用ガバナー １４ 自動開閉弁（電磁弁） １５ 圧力記録装置 １６ 圧力センサー １６’ 圧力スイッチ １７ コントローラ １８ 逆止弁 １９ ブースタ ２０ 演算機構 ２１ 定流量弁 ２２ ガバナー ａ 測定用ガス ｂ 供給ガス ｃ 本管のガス Ｈ 需要家 DESCRIPTION OF SYMBOLS 1 Gas main line 2 Supply governor 3 Gas conduit 4 Retraction pipe 5 On-off valve 6 Gas meter 7 Gas supply line 10 Measurement gas pipe 11 Measurement gas cylinder 12 Pressure reducing valve 13 Measurement governor 14 Automatic open / close valve (solenoid valve) 15 Pressure recording device 16 Pressure sensor 16 'Pressure switch 17 Controller 18 Check valve 19 Booster 20 Arithmetic mechanism 21 Constant flow valve 22 Governor a Measurement gas b Supply gas c Main gas H Consumer
Claims (7)
ガス供給管路に、上記所定圧力よりより僅かに高い圧力
の測定用ガスａを強制流入する直前のガス供給管路内の
圧力Ｐ1 を測定して、上記測定用ガスａを定流量（ｌ／
sec ）でｔ1時間強制流入させて測定用ガスの供給を閉
じ、そのときのガス供給管路内の圧力Ｐ2 を測定し、そ
の後ｔ2 時間経過したときのガス供給管路の内圧Ｐ3 を
測定し、これらのデーターを基にガス供給管路の内容積
Ｖとガス供給管路から洩れたガス量Ｑ2 とを演算するガ
ス供給管路の内容積・漏洩量測定法。1. A pressure P1 in a gas supply line immediately before a measurement gas a having a pressure slightly higher than the predetermined pressure is forcibly flown into a gas supply line to which a gas adjusted to a predetermined pressure is supplied. Is measured, and the measurement gas a is supplied at a constant flow rate (l /
(sec), the gas is forced to flow in for t1 and the supply of the measuring gas is closed, the pressure P2 in the gas supply line at that time is measured, and then the internal pressure P3 in the gas supply line when time t2 has elapsed is measured. Based on these data, a method for measuring the internal volume V of the gas supply line and the amount of gas leaked from the gas supply line is used to calculate the internal volume V of the gas supply line and the amount of gas leaked from the gas supply line.
ガス供給管路に、上記所定圧力よりより高い圧力の測定
用ガスａを強制流入する直前のガス供給管路内の圧力Ｐ
1 を測定し、上記ガス供給管路の内圧がＰ1 より僅かに
高い圧力Ｐ2になるまで上記測定用ガスａを定流量（ｌ
／sec ）で強制流入させて測定用ガスの供給を閉じ、上
記強制流入時間ｔ1 を測定し、その後ガス供給管路の内
圧がＰ3 まで降下するのに所要な時間ｔ2 を測定し、こ
れらのデーターを基にガス供給管路の内容積Ｖとガス供
給管路から洩れたガス量Ｑ2 とを演算するガス供給管路
の内容積・漏洩量測定法。2. The pressure P in the gas supply line immediately before the measurement gas a having a pressure higher than the predetermined pressure is forcibly flown into the gas supply line to which the gas adjusted to the predetermined pressure is supplied.
1 is measured, and the measuring gas a is supplied at a constant flow rate (l) until the internal pressure of the gas supply pipe reaches a pressure P2 slightly higher than P1.
/ Sec), the supply of the measuring gas is closed, the forced inflow time t1 is measured, and then the time t2 required for the internal pressure of the gas supply line to drop to P3 is measured. A method for measuring the internal volume / leakage amount of a gas supply line by calculating the internal volume V of the gas supply line and the amount Q2 of gas leaked from the gas supply line based on the above.
一に設定する請求項２に記載のガス供給管路の内容積・
漏洩量測定法。3. The gas supply line according to claim 2, wherein the internal pressure P3 of the gas supply line is set equal to P1.
Leakage measurement method.
時間をガス消費の少ない時間帯に限定して行うことを特
徴とする請求項１または２に記載のガス供給管路の内容
積・漏洩量測定法。4. The internal volume of the gas supply line according to claim 1, wherein the measurement time of the internal volume and the amount of leakage of the gas supply line is limited to a time zone in which gas consumption is small.・ Leakage measurement method.
入しても、ガス供給管路の内圧が上昇しない場合、その
強制流入作業を停止し、一定時間の経過後、再度、前記
操作を繰り返すことを特徴とする請求項１乃至３のいず
れかに記載のガス供給管路の内容積・漏洩量測定法。5. When the internal pressure of the gas supply line does not rise even when the measurement gas is forced into the gas supply line, the forced inflow work is stopped, and after a certain time has passed, the operation is repeated. 4. The method for measuring the internal volume / leakage of a gas supply pipe according to claim 1, wherein the method is repeated.
８を介してガス導管３を需要家群へ延設し、そのガス導
管３から各需要家へ向けて引込み管４を接続してなるガ
ス供給管路７と、上記ガス導管３に自動開閉弁１４と定
流量弁２１とを介して接続した測定用ガス供給管１０
と、上記ガス導管３または、測定用ガス管１０の自動開
閉弁１４からガス導管３までの間に設けられた圧力セン
サー１６と、該圧力センサー１６の出力信号を受けて自
動開閉弁１４に開閉信号を発する時計回路を備えたコン
トローラ１７と、上記コントローラ１７に付設され、上
記コントローラ１７からの情報および定流量弁２１から
与えられる情報を基にガス供給管路７の内容積・漏洩量
の演算を行う演算機構からなるガス供給管路の内容積・
漏洩量測定装置。6. A gas governor 1 or a check valve 1
A gas supply line 7 extending from the gas conduit 3 to each customer through a gas supply line 7 connected to a group of consumers via a gas supply line 8; Measurement gas supply pipe 10 connected via a constant flow valve 21
A pressure sensor 16 provided between the gas conduit 3 or the automatic on-off valve 14 of the measuring gas pipe 10 and the gas conduit 3, and receiving an output signal of the pressure sensor 16 to open and close the automatic on-off valve 14 A controller 17 having a clock circuit for generating a signal, and a calculation of the internal volume and the amount of leakage of the gas supply pipe 7 based on information provided from the controller 17 and information provided from the constant flow valve 21. Volume of the gas supply line consisting of an arithmetic mechanism
Leakage measurement device.
ガス本管１またはガス導管３のガバナーの上流側にガバ
ナー２２を介して接続されてなる請求項５に記載のガス
供給管路の内容積・漏洩量測定法を実施する装置。7. The gas source of the measurement gas supply pipe 10 is as follows:
The apparatus for performing the method for measuring the internal volume / leakage amount of a gas supply pipe according to claim 5, wherein the apparatus is connected to the upstream side of the governor of the gas main pipe 1 or the gas conduit 3 via a governor 22.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29124999A JP2001108569A (en) | 1999-10-13 | 1999-10-13 | Method for measuring content volume of gas supply line and leak volume, and device therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29124999A JP2001108569A (en) | 1999-10-13 | 1999-10-13 | Method for measuring content volume of gas supply line and leak volume, and device therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001108569A true JP2001108569A (en) | 2001-04-20 |
| JP2001108569A5 JP2001108569A5 (en) | 2006-10-19 |
Family
ID=17766426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29124999A Pending JP2001108569A (en) | 1999-10-13 | 1999-10-13 | Method for measuring content volume of gas supply line and leak volume, and device therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001108569A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003090777A (en) * | 2001-09-20 | 2003-03-28 | Ito Koki Kk | Gas leakage detector |
| JP2007232666A (en) * | 2006-03-03 | 2007-09-13 | Fujikin Inc | Method and device for inspecting leakage in pipe line |
| JP2008058037A (en) * | 2006-08-29 | 2008-03-13 | Tokyo Gas Engineering Co Ltd | Authenticity determining method for airtightness/leakage inspection data of gas piping and airtightness/leakage inspection report |
| DE102014014638A1 (en) * | 2014-10-01 | 2016-04-28 | Mustafa Atalay | Volume measurement (using air pressure) content measurement |
| JP2021019137A (en) * | 2019-07-22 | 2021-02-15 | 株式会社ディスコ | Holding device and processing device |
| CN114484294A (en) * | 2021-12-29 | 2022-05-13 | 东本电气科技(苏州)有限公司 | Gas riser leak detection method and leak detection device |
-
1999
- 1999-10-13 JP JP29124999A patent/JP2001108569A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003090777A (en) * | 2001-09-20 | 2003-03-28 | Ito Koki Kk | Gas leakage detector |
| JP2007232666A (en) * | 2006-03-03 | 2007-09-13 | Fujikin Inc | Method and device for inspecting leakage in pipe line |
| WO2007105360A1 (en) * | 2006-03-03 | 2007-09-20 | Fujikin Incorporated | Leakage inspecting method and leakage inspecting device for pipe lines |
| JP4684135B2 (en) * | 2006-03-03 | 2011-05-18 | 株式会社フジキン | Leakage inspection method and leak inspection apparatus for piping |
| JP2008058037A (en) * | 2006-08-29 | 2008-03-13 | Tokyo Gas Engineering Co Ltd | Authenticity determining method for airtightness/leakage inspection data of gas piping and airtightness/leakage inspection report |
| DE102014014638A1 (en) * | 2014-10-01 | 2016-04-28 | Mustafa Atalay | Volume measurement (using air pressure) content measurement |
| JP2021019137A (en) * | 2019-07-22 | 2021-02-15 | 株式会社ディスコ | Holding device and processing device |
| CN114484294A (en) * | 2021-12-29 | 2022-05-13 | 东本电气科技(苏州)有限公司 | Gas riser leak detection method and leak detection device |
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