JP2005293126A - Gas pressure control facility - Google Patents

Gas pressure control facility Download PDF

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JP2005293126A
JP2005293126A JP2004106067A JP2004106067A JP2005293126A JP 2005293126 A JP2005293126 A JP 2005293126A JP 2004106067 A JP2004106067 A JP 2004106067A JP 2004106067 A JP2004106067 A JP 2004106067A JP 2005293126 A JP2005293126 A JP 2005293126A
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gas
side pipe
gas pressure
pressure
primary side
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Akira Fukuda
章 福田
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Osaka Gas Co Ltd
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Osaka Gas Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To lower the pressure in a secondary line, when the pressure exceeds a set pressure, without venting gas in the secondary line to the atmosphere, and to easily collect gas and process the gas collected. <P>SOLUTION: A gas pressure reducing means is provided in a circulation means 2, by which the gas in the secondary line P2 is forced back into a primary line P1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、二次側配管内のガス圧力が一次側配管内のガス圧力よりも低い設定供給圧力になるように流量を調整しながら、前記一次側配管から前記二次側配管にガスを通流させるガバナと、前記二次側配管内のガス圧力が、前記設定供給圧力よりも高い設定圧力を越えると、その二次側配管内のガス圧力を低下させるガス圧力低下手段とを設けてあるガス圧力調整設備に関する。   The present invention allows gas to pass from the primary side pipe to the secondary side pipe while adjusting the flow rate so that the gas pressure in the secondary side pipe becomes a set supply pressure lower than the gas pressure in the primary side pipe. And a gas pressure reducing means for reducing the gas pressure in the secondary pipe when the gas pressure in the secondary pipe exceeds a set pressure higher than the set supply pressure. It relates to gas pressure adjustment equipment.

上記ガス圧力調整設備は、ガバナの故障や気温の変化などに起因して、二次側配管内のガス圧力が設定供給圧力を越えて高くなると、導管からのガス漏洩やガスメータの破損，燃焼不良などの事態を招くおそれがあるので、設定供給圧力よりも高い設定圧力を越えると、その二次側配管内のガス圧力を低下させるガス圧力低下手段を設けてある。
従来の上記ガス圧力調整設備では、ガス圧力低下手段として、例えば、水封式安全器を設けてあり(例えば、特許文献１参照)、この水封式安全器は、放散管を通して外部に連通する容器内に水を貯留しておき、二次側配管内のガスを導入する導入管を、その容器内に貯留してある水中に、端部に形成した開口部が設定圧力に相当する水深に位置するように入り込ませて、二次側配管内のガス圧力が設定圧力を越えると、その二次側配管内のガスを、導入管を通して、開口部から水中に噴出させるように構成するとともに、その噴出させたガスを、放散管を通して外部に放出できるように構成してあり、水中に噴出させたガスが放散管を通して大気中に放出されないように、放散管にタンクを接続して、放散管を通して、タンクに貯留しておくことが提案されている。 If the gas pressure in the secondary piping becomes higher than the set supply pressure due to a governor failure or temperature change, the above gas pressure adjustment equipment will cause gas leakage from the conduit, damage to the gas meter, and poor combustion. Therefore, there is provided a gas pressure lowering means for lowering the gas pressure in the secondary side pipe when the set pressure higher than the set supply pressure is exceeded.
In the conventional gas pressure adjusting equipment, for example, a water-sealed safety device is provided as a gas pressure lowering means (see, for example, Patent Document 1), and this water-sealed safety device communicates with the outside through a diffusion pipe. Water is stored in the container, and the introduction pipe that introduces the gas in the secondary side pipe is in the water stored in the container, and the opening formed at the end has a water depth corresponding to the set pressure. When the gas pressure in the secondary side pipe exceeds the set pressure, the gas in the secondary side pipe is configured to be jetted into the water from the opening through the introduction pipe, The ejected gas is configured to be released to the outside through the diffusion tube, and a tank is connected to the diffusion tube so that the gas ejected into the water is not released into the atmosphere through the diffusion tube. Through the tank Door has been proposed.

特開２００２−１５７０２０号公報JP 2002-157020 A

しかしながら、二次側配管内のガスが大気中に放出されないように、上述のように、水封式安全器の放散管にタンクに接続した場合は、タンク内に貯留したガスの圧力が放散管を通して容器内の水に作用し、その結果、二次側配管内のガスが、導入管を通して、開口部から水中に噴出するときの二次側配管内のガス圧力が高くなって、二次側配管内のガス圧力が設定圧力を越えても、その二次側配管内のガス圧力を低下させることができない欠点がある。
また、仮に、二次側配管内のガス圧力が設定圧力を越えると、その二次側配管内のガス圧力を低下させることができたとしても、タンク内に貯留したガスの回収や回収したガスの処理などの手間が掛かる問題がある。
本発明は上記実情に鑑みてなされたものであって、ガス圧力低下手段を設けるにあたって、二次側配管内のガス圧力が設定圧力を越えると、二次側配管内のガスを大気中に放出することなく、その二次側配管内のガス圧力を確実に低下させることができ、ガスの回収や回収したガスの処理などの手間も掛からないようにすることを目的とする。 However, as described above, when the tank is connected to the diffusion pipe of the water-sealed safety device so that the gas in the secondary side pipe is not released into the atmosphere, the pressure of the gas stored in the tank is the diffusion pipe. As a result, the gas pressure in the secondary side pipe when the gas in the secondary side pipe is jetted into the water from the opening through the introduction pipe is increased, resulting in the secondary side pipe. Even if the gas pressure in the pipe exceeds the set pressure, there is a drawback that the gas pressure in the secondary pipe cannot be reduced.
In addition, if the gas pressure in the secondary pipe exceeds the set pressure, even if the gas pressure in the secondary pipe can be reduced, the gas stored in the tank can be recovered or recovered. There is a problem that it takes time and effort.
The present invention has been made in view of the above circumstances, and in providing the gas pressure reducing means, when the gas pressure in the secondary side pipe exceeds the set pressure, the gas in the secondary side pipe is released into the atmosphere. Therefore, it is possible to reliably reduce the gas pressure in the secondary side pipe without causing troubles such as recovery of the gas and processing of the recovered gas.

本発明の第１特徴構成は、二次側配管内のガス圧力が一次側配管内のガス圧力よりも低い設定供給圧力になるように流量を調整しながら、前記一次側配管から前記二次側配管にガスを通流させるガバナと、前記二次側配管内のガス圧力が、前記設定供給圧力よりも高い設定圧力を越えると、その二次側配管内のガス圧力を低下させるガス圧力低下手段とを設けてあるガス圧力調整設備であって、前記ガス圧力低下手段を、前記二次側配管内のガスを前記一次側配管内に強制的に還流させる還流手段を設けて構成してある点にある。   The first characteristic configuration of the present invention is that the secondary side pipe is connected to the secondary side while adjusting the flow rate so that the gas pressure in the secondary side pipe becomes a set supply pressure lower than the gas pressure in the primary side pipe. A governor for passing gas through the pipe, and a gas pressure reducing means for reducing the gas pressure in the secondary pipe when the gas pressure in the secondary pipe exceeds a set pressure higher than the set supply pressure. And the gas pressure reducing means is provided with a reflux means for forcibly returning the gas in the secondary side pipe into the primary side pipe. It is in.

〔作用及び効果〕
ガス圧力低下手段を、二次側配管内のガスを一次側配管内に強制的に還流させる還流手段を設けて構成してあるので、二次側配管内のガス圧力が設定圧力を越えると、二次側配管内のガスを大気中に放出することなく、一次側配管内に強制的に還流させて、その二次側配管内のガス圧力を確実に低下させることができ、ガスの回収や回収したガスの処理などの手間も掛からない。 [Action and effect]
Since the gas pressure lowering means is provided with a reflux means for forcibly returning the gas in the secondary side pipe into the primary side pipe, when the gas pressure in the secondary side pipe exceeds the set pressure, The gas in the secondary side pipe can be forcibly recirculated into the primary side pipe without being released into the atmosphere, and the gas pressure in the secondary side pipe can be reliably reduced, There is no need to process the collected gas.

本発明の第２特徴構成は、前記還流手段を構成するに、前記一次側配管と前記二次側配管とを連通可能なバイパス路に、前記二次側配管内のガス圧力が前記設定圧力を越えると、前記二次側配管内のガスを前記一次側配管側に向けて通過可能に開弁するリリーフ弁と、前記リリーフ弁を通過したガスを貯留可能なタンクと、前記タンクに貯留してあるガスを前記一次側配管内のガス圧力を越えるガス圧力に加圧して前記一次側配管側に向けて吐出可能な加圧装置と、前記加圧装置から吐出したガスのガス圧力が前記一次側配管内のガス圧力を越えると、そのガスを前記一次側配管側に向けて通過可能に開弁する逆止弁とを、前記二次側配管側から順に設けるとともに、前記二次側配管内のガス圧力と前記タンク内のガス圧力との差圧が設定差圧以下になると、前記タンクに貯留してあるガスを前記一次側配管内のガス圧力を越えるガス圧力に加圧して前記一次側配管側に向けて吐出するように、前記加圧装置の駆動を制御する制御部を設けて構成してある点にある。   According to a second characteristic configuration of the present invention, when the reflux means is configured, a bypass path capable of communicating the primary side pipe and the secondary side pipe is configured such that the gas pressure in the secondary side pipe is set to the set pressure. If it exceeds, a relief valve that opens the gas in the secondary side pipe so as to be able to pass toward the primary side pipe side, a tank that can store the gas that has passed through the relief valve, A pressurizing device capable of pressurizing a gas to a gas pressure exceeding the gas pressure in the primary side piping and discharging the gas toward the primary side piping; and the gas pressure of the gas discharged from the pressurizing device is the primary side When the gas pressure in the pipe is exceeded, a check valve that opens the gas so as to be able to pass toward the primary side pipe side is provided in order from the secondary side pipe side, and in the secondary side pipe, The differential pressure between the gas pressure and the gas pressure in the tank Control of driving of the pressurizing device so that the gas stored in the tank is pressurized to a gas pressure exceeding the gas pressure in the primary side pipe and discharged toward the primary side pipe when This is in that a control unit is provided.

〔作用及び効果〕
図１に例示するように、一次側配管Ｐ１と二次側配管Ｐ２とを連通可能なバイパス路４に、二次側配管Ｐ２内のガス圧力が設定圧力を越えると、その二次側配管Ｐ２内のガスを一次側配管Ｐ１側に向けて通過可能に開弁するリリーフ弁５と、そのリリーフ弁５を通過したガスを貯留可能なタンク６とを、二次側配管Ｐ２側から順に設けてあるので、二次側配管Ｐ２内のガス圧力が設定圧力以下のときは、リリーフ弁５が閉弁していて、二次側配管Ｐ２内のガス圧力が低下することがなく、二次側配管Ｐ２内のガス圧力が設定圧力を越えると、リリーフ弁５が開弁して、二次側配管Ｐ２内のガスがタンク６に流入し、二次側配管Ｐ２内のガス圧力を低下させることができる。
また、バイパス路４におけるタンク６の一次側配管Ｐ１側に、タンク６に貯留してあるガスを加圧して一次側配管Ｐ１側に向けて吐出可能な加圧装置７を設け、二次側配管Ｐ２内のガス圧力とタンク６内のガス圧力との差圧が設定差圧以下になると、タンク６に貯留してあるガスを加圧して一次側配管Ｐ１側に向けて吐出するように、加圧装置７の駆動を制御する制御部１０を設けてあるので、二次側配管Ｐ２内のガス圧力とタンク６内のガス圧力との差圧を、タンク６内のガス圧力の低下によって、設定差圧を越える差圧に維持することができ、タンク６内のガス圧力が上昇した結果、二次側配管Ｐ２内のガス圧力が設定圧力を越えても、二次側配管Ｐ２内のガスがタンク６に流入しなくなって、二次側配管Ｐ２内のガス圧力を低下させることができなくなるような事態を確実に防止できる。
その上、加圧装置７を、タンク６に貯留してあるガスを一次側配管Ｐ１内のガス圧力を越えるガス圧力に加圧してタンク６から一次側配管Ｐ１側に向けて吐出可能に設け、その加圧装置７の一次側配管Ｐ１側に、加圧装置７から吐出したガスのガス圧力が一次側配管Ｐ１内のガス圧力を越えると、そのガスを一次側配管Ｐ１側に向けて通過可能に開弁する逆止弁９を設けてあるので、ガス圧力が高い一次側配管Ｐ１内のガスの二次側配管内への流入を防止できるとともに、加圧装置７から吐出したガスを、大気中に放出することなく、一次側配管Ｐ１側に還流させることができ、加圧装置７から吐出したガスを回収したり、その回収したガスを処理するような手間も掛からない。 [Action and effect]
As illustrated in FIG. 1, when the gas pressure in the secondary side pipe P2 exceeds the set pressure on the bypass path 4 that allows the primary side pipe P1 and the secondary side pipe P2 to communicate with each other, the secondary side pipe P2 A relief valve 5 that opens the gas inside the tank so as to be able to pass toward the primary side pipe P1, and a tank 6 that can store the gas that has passed through the relief valve 5 are provided in order from the secondary side pipe P2 side. Therefore, when the gas pressure in the secondary side pipe P2 is equal to or lower than the set pressure, the relief valve 5 is closed and the gas pressure in the secondary side pipe P2 does not decrease, and the secondary side pipe When the gas pressure in P2 exceeds the set pressure, the relief valve 5 opens, the gas in the secondary side pipe P2 flows into the tank 6, and the gas pressure in the secondary side pipe P2 may be reduced. it can.
Further, a pressurizing device 7 capable of pressurizing the gas stored in the tank 6 and discharging it toward the primary side pipe P1 side is provided on the primary side pipe P1 side of the tank 6 in the bypass path 4, and the secondary side pipe When the differential pressure between the gas pressure in P2 and the gas pressure in the tank 6 is equal to or lower than the set differential pressure, the gas stored in the tank 6 is pressurized so that the gas is discharged toward the primary side pipe P1. Since the control unit 10 for controlling the driving of the pressure device 7 is provided, the differential pressure between the gas pressure in the secondary side pipe P2 and the gas pressure in the tank 6 is set by a decrease in the gas pressure in the tank 6. Even if the gas pressure in the secondary side pipe P2 exceeds the set pressure, the gas in the secondary side pipe P2 can be maintained at a differential pressure exceeding the differential pressure. The gas does not flow into the tank 6 and the gas pressure in the secondary side pipe P2 is reduced. Bet such a situation that can not be reliably prevented.
In addition, the pressurization device 7 is provided so that the gas stored in the tank 6 can be pressurized to a gas pressure exceeding the gas pressure in the primary side pipe P1 and discharged from the tank 6 toward the primary side pipe P1. When the gas pressure of the gas discharged from the pressurizing device 7 exceeds the gas pressure in the primary side piping P1 to the primary side piping P1 side, the gas can pass toward the primary side piping P1 side. Since the check valve 9 that opens is provided in the primary side pipe P1, the gas in the primary side pipe P1 having a high gas pressure can be prevented from flowing into the secondary side pipe, and the gas discharged from the pressurizer 7 can be discharged into the atmosphere. It can be recirculated to the primary side pipe P1 side without being discharged into the inside, and it does not take time and effort to recover the gas discharged from the pressurizing device 7 or to process the recovered gas.

本発明の第３特徴構成は、前記還流手段を構成するに、前記一次側配管と前記二次側配管とを連通可能なバイパス路に、前記二次側配管内のガスを前記一次側配管内のガス圧力を越えるガス圧力に加圧して前記一次側配管側に向けて吐出可能な加圧装置と、前記加圧装置から吐出したガスのガス圧力が前記一次側配管内のガス圧力を越えると、そのガスを前記一次側配管側に通過可能に開弁する逆止弁とを設けるとともに、前記二次側配管内のガス圧力が前記設定圧力を越えると、前記二次側配管内のガスを前記一次側配管内のガス圧力を越えるガス圧力に加圧して前記一次側配管側に向けて吐出するように、前記加圧装置の駆動を制御する制御部を設けて構成してある点にある。   According to a third characteristic configuration of the present invention, when the reflux means is configured, the gas in the secondary side pipe is transferred to the bypass side in which the primary side pipe and the secondary side pipe can communicate with each other. A pressurizing device capable of pressurizing to a gas pressure exceeding the gas pressure and discharging toward the primary side pipe, and a gas pressure of gas discharged from the pressurizing unit exceeding the gas pressure in the primary side pipe A check valve that opens the gas so that the gas can pass to the primary side pipe side, and when the gas pressure in the secondary side pipe exceeds the set pressure, the gas in the secondary side pipe is A control unit for controlling the driving of the pressurizing device is provided so as to pressurize the gas pressure exceeding the gas pressure in the primary side piping and discharge the gas pressure toward the primary side piping. .

〔作用及び効果〕
図２に例示するように、一次側配管Ｐ１と二次側配管Ｐ２とを連通可能なバイパス路４に、二次側配管Ｐ２内のガスを加圧して一次側配管Ｐ１側に向けて吐出可能な加圧装置７と、二次側配管Ｐ２内のガス圧力が設定圧力を越えると、二次側配管Ｐ２内のガスを加圧して一次側配管Ｐ１側に向けて吐出するように、加圧装置７の駆動を制御する制御部１０を設けてあるので、二次側配管Ｐ２内のガス圧力が設定圧力以下のときは、加圧装置７の駆動によって二次側配管Ｐ２内のガス圧力が低下することがなく、二次側配管Ｐ２内のガス圧力が設定圧力を越えると、加圧装置７の駆動によって、二次側配管Ｐ２内のガスが一次側配管Ｐ１側に向けて吐出され、二次側配管Ｐ２内のガス圧力を低下させることができる。
また、加圧装置７を、二次側配管Ｐ２内のガスを一次側配管Ｐ１内のガス圧力を越えるガス圧力に加圧して一次側配管Ｐ１側に向けて吐出可能に設け、加圧装置７から吐出したガスのガス圧力が一次側配管Ｐ１内のガス圧力を越えると、そのガスを一次側配管Ｐ１側に通過可能に開弁する逆止弁９を設けてあるので、ガス圧力が高い一次側配管Ｐ１内のガスの二次側配管Ｐ２内への流入を防止できるとともに、加圧装置７から吐出したガスを、大気中に放出することなく、一次側配管Ｐ１側に還流させることができ、加圧装置７から吐出したガスを回収したり、その回収したガスを処理するような手間も掛からない。 [Action and effect]
As illustrated in FIG. 2, the gas in the secondary side pipe P2 can be pressurized and discharged toward the primary side pipe P1 side to the bypass path 4 that allows the primary side pipe P1 and the secondary side pipe P2 to communicate with each other. When the gas pressure in the secondary pressurization device 7 and the secondary side pipe P2 exceeds the set pressure, pressurization is performed so that the gas in the secondary side pipe P2 is pressurized and discharged toward the primary side pipe P1. Since the control unit 10 for controlling the driving of the device 7 is provided, when the gas pressure in the secondary side pipe P2 is equal to or lower than the set pressure, the gas pressure in the secondary side pipe P2 is driven by driving the pressurizing device 7. When the gas pressure in the secondary side pipe P2 exceeds the set pressure without decreasing, the gas in the secondary side pipe P2 is discharged toward the primary side pipe P1 by driving the pressurizing device 7, The gas pressure in the secondary side pipe P2 can be reduced.
Further, the pressurizing device 7 is provided so that the gas in the secondary side pipe P2 is pressurized to a gas pressure exceeding the gas pressure in the primary side pipe P1 and can be discharged toward the primary side pipe P1. When the gas pressure of the gas discharged from the gas exceeds the gas pressure in the primary side pipe P1, a check valve 9 is provided to open the gas so that the gas can pass to the primary side pipe P1 side. The gas in the side pipe P1 can be prevented from flowing into the secondary side pipe P2, and the gas discharged from the pressurizer 7 can be recirculated to the primary side pipe P1 without being released into the atmosphere. There is no need to collect the gas discharged from the pressurizing device 7 or to process the collected gas.

本発明の第４特徴構成は、前記還流手段を構成するに、前記一次側配管と前記二次側配管とを連通可能なバイパス路に、前記二次側配管内のガスを前記一次側配管内のガス圧力を越えるガス圧力に加圧して前記一次側配管側に向けて吐出可能な加圧装置を、吐出流量を変更可能に設けるとともに、前記加圧装置から吐出したガスのガス圧力が前記一次側配管内のガス圧力を越えると、そのガスを前記一次側配管側に通過可能に開弁する逆止弁を設け、前記二次側配管内のガス圧力が前記設定圧力以下のときは、前記二次側配管内のガスを前記一次側配管内のガス圧力を越えるガス圧力に加圧して前記一次側配管側に向けて小さい吐出流量で吐出し、前記二次側配管内のガス圧力が前記設定圧力を越えると、前記二次側配管内のガスを前記一次側配管内のガス圧力を越えるガス圧力に加圧して前記一次側配管側に向けて大きい吐出流量で吐出するように、前記加圧装置の駆動を制御する制御部を設けて構成してある点にある。   According to a fourth characteristic configuration of the present invention, when the reflux means is configured, a gas in the secondary side pipe is supplied to a bypass path in which the primary side pipe and the secondary side pipe can communicate with each other. A pressurizing device capable of pressurizing to a gas pressure exceeding the gas pressure and discharging toward the primary pipe side so that the discharge flow rate can be changed, and the gas pressure of the gas discharged from the pressurizing device is the primary pressure When the gas pressure in the side pipe is exceeded, a check valve is provided to open the gas so that the gas can pass to the primary side pipe side, and when the gas pressure in the secondary side pipe is equal to or lower than the set pressure, The gas in the secondary side pipe is pressurized to a gas pressure exceeding the gas pressure in the primary side pipe and discharged toward the primary side pipe at a small discharge flow rate, and the gas pressure in the secondary side pipe is When the set pressure is exceeded, the gas in the secondary side piping is moved to the primary side. A control unit for controlling the drive of the pressurizing device is provided so that the gas pressure exceeding the gas pressure in the pipe is pressurized and discharged toward the primary pipe side at a large discharge flow rate. is there.

〔作用及び効果〕
図２を用いて説明すると、一次側配管Ｐ１と二次側配管Ｐ２とを連通可能なバイパス路４に、二次側配管Ｐ２内のガスを加圧して一次側配管Ｐ１側に向けて吐出可能な加圧装置７を、吐出流量を変更可能に設け、二次側配管Ｐ２内のガス圧力が設定圧力以下のときは、二次側配管Ｐ２内のガスを加圧して一次側配管Ｐ１側に向けて小さい吐出流量で吐出し、二次側配管Ｐ２内のガス圧力が設定圧力を越えると、二次側配管Ｐ２内のガスを加圧して一次側配管Ｐ１側に向けて大きい吐出流量で吐出するように、加圧装置７の駆動を制御する制御部１０を設けてあるので、二次側配管Ｐ２内のガス圧力が設定圧力を越えると、二次側配管Ｐ２内のガスを加圧装置７で加圧して、一次側配管Ｐ１側に向けて大きい吐出流量で吐出させることにより、二次側配管Ｐ２内のガス圧力を低下させることができるのであるが、二次側配管Ｐ２内のガス圧力が設定圧力以下のときは、二次側配管Ｐ２内のガスを加圧装置７で加圧して、一次側配管Ｐ１側に向けて小さい吐出流量で吐出させることにより、少なくともその一次側配管Ｐ１側に向けての吐出によって、二次側配管Ｐ２内のガス圧力が設定供給圧力を下回ることがないように、ガバナ１は一次側配管Ｐ１から二次側配管Ｐ２にガスを通流させるので、ガバナ１による一次側配管Ｐ１から二次側配管Ｐ２へのガスの通流が停止されることがなく、従って、ガバナの作動状態が弁体が開いている通流状態と弁体が閉じている通流停止状態とに亘って変化することによる通流量の急激な変動がなく、弁体のハンチングを防止して、流量を安定的に調整できる。
また、加圧装置７を、二次側配管Ｐ２内のガスを一次側配管Ｐ１内のガス圧力を越えるガス圧力に加圧して一次側配管Ｐ１側に向けて吐出可能に設け、加圧装置７から吐出したガスのガス圧力が一次側配管Ｐ１内のガス圧力を越えると、そのガスを一次側配管Ｐ１側に通過可能に開弁する逆止弁９を設けてあるので、ガス圧力が高い一次側配管Ｐ１内のガスの二次側配管Ｐ２内への流入を防止できるとともに、加圧装置７から吐出したガスを、大気中に放出することなく、一次側配管Ｐ１側に還流させることができ、加圧装置７から吐出したガスを回収したり、その回収したガスを処理するような手間も掛からない。
その上、二次側配管内のガス圧力が設定圧力以下のときは、流量を安定的に調整できる。 [Action and effect]
Referring to FIG. 2, the gas in the secondary side pipe P2 can be pressurized and discharged toward the primary side pipe P1 to the bypass path 4 that allows the primary side pipe P1 and the secondary side pipe P2 to communicate with each other. When the gas pressure in the secondary side pipe P2 is equal to or lower than the set pressure, the gas in the secondary side pipe P2 is pressurized to the primary side pipe P1 side. When the gas pressure in the secondary side pipe P2 exceeds the set pressure, the gas in the secondary side pipe P2 is pressurized and discharged toward the primary side pipe P1 at a large discharge flow rate. As described above, since the controller 10 for controlling the driving of the pressurizing device 7 is provided, when the gas pressure in the secondary side pipe P2 exceeds the set pressure, the gas in the secondary side pipe P2 is pressurized. 7 and pressurizing at a large discharge flow rate toward the primary side pipe P1 side, The gas pressure in the secondary side pipe P2 can be reduced. When the gas pressure in the secondary side pipe P2 is lower than the set pressure, the gas in the secondary side pipe P2 is added by the pressurizer 7. When the pressure is discharged and discharged toward the primary side pipe P1 with a small discharge flow rate, the gas pressure in the secondary side pipe P2 is lower than the set supply pressure by at least the discharge toward the primary side pipe P1. Since the governor 1 causes the gas to flow from the primary side pipe P1 to the secondary side pipe P2, the gas flow from the primary side pipe P1 to the secondary side pipe P2 by the governor 1 is stopped. Therefore, there is no sudden fluctuation in the flow rate due to the change of the governor operating state between the flow state in which the valve body is open and the flow stop state in which the valve body is closed. Prevent hunting and stabilize flow rate It can be an integer.
Further, the pressurizing device 7 is provided so that the gas in the secondary side pipe P2 is pressurized to a gas pressure exceeding the gas pressure in the primary side pipe P1 and can be discharged toward the primary side pipe P1. When the gas pressure of the gas discharged from the gas exceeds the gas pressure in the primary side pipe P1, a check valve 9 is provided to open the gas so that the gas can pass to the primary side pipe P1 side. The gas in the side pipe P1 can be prevented from flowing into the secondary side pipe P2, and the gas discharged from the pressurizer 7 can be recirculated to the primary side pipe P1 without being released into the atmosphere. There is no need to collect the gas discharged from the pressurizing device 7 or to process the collected gas.
In addition, when the gas pressure in the secondary pipe is equal to or lower than the set pressure, the flow rate can be adjusted stably.

以下に本発明の実施の形態を図面に基づいて説明する。
〔第１実施形態〕
図１は、都市ガス供給用の本発明によるガス圧力調整設備を示し、二次側配管Ｐ２内のガス圧力が一次側配管Ｐ１内のガス圧力よりも低い設定供給圧力になるように流量を調整しながら、一次側配管Ｐ１から二次側配管Ｐ２にガスを通流させるガバナ１と、二次側配管Ｐ２内のガス圧力が、設定供給圧力よりも高い設定圧力を越えると、その二次側配管Ｐ２内のガス圧力を低下させるガス圧力低下手段２とを設け、ガバナ１に流入するガスを濾過するフィルター装置３を一次側配管Ｐ１に接続してある。
前記ガス圧力低下手段２は、二次側配管Ｐ２内のガスを一次側配管Ｐ１内に強制的に還流させる還流手段を設けて構成してある。 Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
FIG. 1 shows a gas pressure adjustment facility according to the present invention for supplying city gas, and the flow rate is adjusted so that the gas pressure in the secondary side pipe P2 is lower than the gas pressure in the primary side pipe P1. However, when the gas pressure in the governor 1 for passing gas from the primary side pipe P1 to the secondary side pipe P2 and the gas pressure in the secondary side pipe P2 exceeds a set pressure higher than the set supply pressure, the secondary side Gas pressure lowering means 2 for lowering the gas pressure in the pipe P2 is provided, and a filter device 3 for filtering the gas flowing into the governor 1 is connected to the primary side pipe P1.
The gas pressure lowering means 2 includes a reflux means for forcibly returning the gas in the secondary side pipe P2 into the primary side pipe P1.

前記還流手段２は、一次側配管Ｐ１と二次側配管Ｐ２とを連通可能なバイパス路４に、二次側配管Ｐ２内のガス圧力が設定圧力を越えると、二次側配管Ｐ２内のガスを一次側配管Ｐ１側に向けて通過可能に開弁するリリーフ弁５と、リリーフ弁５を通過したガスを貯留可能なタンク６と、そのタンク６に貯留してあるガスを一次側配管Ｐ１内のガス圧力を越える所定のガス圧力に加圧して一次側配管Ｐ１側に向けて吐出可能な加圧装置（圧縮機）７と、加圧装置７から吐出したガスのガス圧力が一次側配管Ｐ１内のガス圧力を越えると、そのガスをフィルター８を通して一次側配管Ｐ１側に向けて通過可能に開弁する逆止弁９とを、二次側配管Ｐ２側から順に設けるとともに、加圧装置７の駆動を制御する制御部１０を設けて構成してある。   When the gas pressure in the secondary side pipe P2 exceeds the set pressure on the bypass path 4 that allows the primary side pipe P1 and the secondary side pipe P2 to communicate with each other, the reflux means 2 Is opened in such a manner that it can pass toward the primary side pipe P1, the tank 6 capable of storing the gas that has passed through the relief valve 5, and the gas stored in the tank 6 in the primary side pipe P1. The pressure device (compressor) 7 capable of pressurizing to a predetermined gas pressure exceeding the gas pressure and discharging toward the primary side pipe P1 side, and the gas pressure of the gas discharged from the pressurizer 7 is the primary side pipe P1. When the internal gas pressure is exceeded, a check valve 9 that opens to allow the gas to pass through the filter 8 toward the primary side pipe P1 is provided in order from the secondary side pipe P2 side, and the pressurizing device 7 The control part 10 which controls the drive of this is provided and comprised.

前記制御部１０は、リリーフ弁５の二次側配管Ｐ２側におけるバイパス路４内のガス圧力を検出する第１圧力センサ１１と、タンク６内のガス圧力を検出する第２圧力センサ１２とを設けて、第１，第２圧力センサ１１，１２から入力される検出情報に基づいて、二次側配管Ｐ２内のガス圧力とタンク６内のガス圧力との差圧が設定差圧以下になったと判定すると、タンク６に貯留してあるガスを一次側配管Ｐ１内のガス圧力を越える所定のガス圧力に加圧して逆止弁９側に向けて吐出するように、加圧装置７の駆動を制御するように設けてある。   The control unit 10 includes a first pressure sensor 11 that detects a gas pressure in the bypass passage 4 on the secondary side pipe P2 side of the relief valve 5 and a second pressure sensor 12 that detects a gas pressure in the tank 6. The differential pressure between the gas pressure in the secondary side pipe P2 and the gas pressure in the tank 6 is equal to or lower than the set differential pressure based on the detection information input from the first and second pressure sensors 11, 12. If it is determined that the gas is stored, the pressurizing device 7 is driven so that the gas stored in the tank 6 is pressurized to a predetermined gas pressure exceeding the gas pressure in the primary side pipe P1 and discharged toward the check valve 9 side. It is provided to control.

〔第２実施形態〕
図２は、都市ガス供給用の本発明によるガス圧力調整設備の別実施形態を示し、還流手段２を、一次側配管Ｐ１と二次側配管Ｐ２とを連通可能なバイパス路４に、二次側配管Ｐ２内のガスを一次側配管Ｐ１内のガス圧力を越える所定のガス圧力に加圧して一次側配管Ｐ１側に向けて吐出可能な加圧装置（圧縮機）７と、加圧装置７から吐出したガスのガス圧力が一次側配管Ｐ１内のガス圧力を越えると、そのガスをフィルター８を通して一次側配管Ｐ１側に通過可能に開弁する逆止弁９とを設けるとともに、加圧装置７の駆動を制御する制御部１０を設けて構成してある。 [Second Embodiment]
FIG. 2 shows another embodiment of the gas pressure adjusting equipment according to the present invention for supplying city gas, in which the reflux means 2 is connected to the bypass passage 4 that allows the primary side pipe P1 and the secondary side pipe P2 to communicate with each other. A pressurizer (compressor) 7 capable of pressurizing the gas in the side pipe P2 to a predetermined gas pressure exceeding the gas pressure in the primary side pipe P1 and discharging the gas toward the primary side pipe P1; When the gas pressure of the gas discharged from the gas exceeds the gas pressure in the primary side pipe P1, there is provided a check valve 9 that opens the gas so that the gas can pass through the filter 8 to the primary side pipe P1 side, and a pressurizing device 7 is provided.

前記制御部１０は、加圧装置７の二次側配管Ｐ２側におけるバイパス路４内のガス圧力を検出する圧力センサ１３を設けて、その圧力センサ１３から入力される検出情報に基づいて、二次側配管Ｐ２内のガス圧力が設定圧力を越えたと判定すると、二次側配管Ｐ２内のガスを一次側配管Ｐ１内のガス圧力を越える所定のガス圧力に加圧して逆止弁９側に向けて吐出するように、加圧装置７の駆動を制御するように設けてある。
その他の構成は第１実施形態と同様である。 The control unit 10 is provided with a pressure sensor 13 for detecting the gas pressure in the bypass passage 4 on the secondary side pipe P2 side of the pressurizing device 7, and based on detection information input from the pressure sensor 13, If it is determined that the gas pressure in the secondary side pipe P2 exceeds the set pressure, the gas in the secondary side pipe P2 is pressurized to a predetermined gas pressure exceeding the gas pressure in the primary side pipe P1 to the check valve 9 side. It is provided so as to control the driving of the pressurizing device 7 so as to discharge the ink.
Other configurations are the same as those of the first embodiment.

〔第３実施形態〕
前記第２実施形態において、吐出流量を変更可能な加圧装置（圧縮機）７を設けて、制御部１０を、圧力センサ１３から入力される検出情報に基づいて、二次側配管Ｐ２内のガス圧力が設定圧力以下であると判定すると、加圧装置７のアイドリング状態での運転によって、二次側配管Ｐ２内のガスを一次側配管Ｐ１内のガス圧力を越えるガス圧力に加圧して、一次側配管Ｐ１側に向けて、ガバナ１で二次側配管Ｐ２内のガス圧力が設定供給圧力になるように流量を調整できる範囲の小さい吐出流量で吐出し、二次側配管Ｐ２内のガス圧力が設定圧力を越えたと判定すると、二次側配管Ｐ２内のガスを一次側配管Ｐ１内のガス圧力を越える所定のガス圧力に加圧して、一次側配管Ｐ１側に向けて大きい吐出流量で吐出するように、加圧装置７の駆動を制御するように設けても良い。
その他の構成は第２実施形態と同様である。 [Third Embodiment]
In the second embodiment, a pressurization device (compressor) 7 capable of changing the discharge flow rate is provided, and the control unit 10 is provided in the secondary side pipe P <b> 2 based on detection information input from the pressure sensor 13. When it is determined that the gas pressure is equal to or lower than the set pressure, the gas in the secondary side pipe P2 is pressurized to a gas pressure exceeding the gas pressure in the primary side pipe P1 by operating the pressurizing device 7 in the idling state. The gas in the secondary side pipe P2 is discharged toward the primary side pipe P1 with a small discharge flow rate that can be adjusted so that the gas pressure in the secondary side pipe P2 becomes the set supply pressure by the governor 1. If it is determined that the pressure exceeds the set pressure, the gas in the secondary side pipe P2 is pressurized to a predetermined gas pressure that exceeds the gas pressure in the primary side pipe P1, and the discharge flow rate is increased toward the primary side pipe P1. So that the pressurizing device 7 It may be provided to control the movement.
Other configurations are the same as those of the second embodiment.

〔その他の実施形態〕
１．本発明によるガス圧力調整設備は、還流手段が作動する設定圧力を変更自在に設けてあっても良い。
２．本発明によるガス圧力調整設備は、逆止弁が開弁する圧力を一次側配管内のガス圧力に応じて自動的に変更可能に設けてあっても良い。
３．本発明によるガス圧力調整設備は、工場や集合住宅，病院、学校などの特定の施設にガスを供給するために設けるものであっても良い。
４．本発明によるガス圧力調整設備は、工場に設けた生産設備（プラント) の一部を構成するために設けるものであっても良い。
５．本発明によるガス圧力調整設備は、メタンガス等の都市ガス供給系以外に、プロパンガスを供給するために設けるものであっても良い。 [Other Embodiments]
1. In the gas pressure adjusting equipment according to the present invention, the set pressure at which the reflux means operates may be provided to be changeable.
2. The gas pressure adjusting equipment according to the present invention may be provided such that the pressure at which the check valve opens can be automatically changed according to the gas pressure in the primary side pipe.
3. The gas pressure adjusting equipment according to the present invention may be provided to supply gas to a specific facility such as a factory, an apartment house, a hospital, or a school.
4). The gas pressure adjusting equipment according to the present invention may be provided to constitute a part of production equipment (plant) provided in a factory.
5). The gas pressure adjusting equipment according to the present invention may be provided for supplying propane gas in addition to a city gas supply system such as methane gas.

第１実施形態の概略を示す系統図System diagram showing the outline of the first embodiment 第２実施形態（第３実施形態）の概略を示す系統図System diagram showing the outline of the second embodiment (third embodiment)

符号の説明Explanation of symbols

１ ガバナ
２ 還流手段
４ バイパス路
５ リリーフ弁
６ タンク
７ 加圧装置
９ 逆止弁
１０ 制御部
Ｐ１ 一次側配管
Ｐ２ 二次側配管 DESCRIPTION OF SYMBOLS 1 Governor 2 Reflux means 4 Bypass path 5 Relief valve 6 Tank 7 Pressurizer 9 Check valve 10 Control part P1 Primary side piping P2 Secondary side piping

Claims (4)

二次側配管内のガス圧力が一次側配管内のガス圧力よりも低い設定供給圧力になるように流量を調整しながら、前記一次側配管から前記二次側配管にガスを通流させるガバナと、
前記二次側配管内のガス圧力が、前記設定供給圧力よりも高い設定圧力を越えると、その二次側配管内のガス圧力を低下させるガス圧力低下手段とを設けてあるガス圧力調整設備であって、
前記ガス圧力低下手段を、前記二次側配管内のガスを前記一次側配管内に強制的に還流させる還流手段を設けて構成してあるガス圧力調整設備。 A governor for allowing gas to flow from the primary side pipe to the secondary side pipe while adjusting the flow rate so that the gas pressure in the secondary side pipe becomes a set supply pressure lower than the gas pressure in the primary side pipe; ,
A gas pressure adjusting facility provided with gas pressure reducing means for reducing the gas pressure in the secondary side pipe when the gas pressure in the secondary side pipe exceeds a set pressure higher than the set supply pressure. There,
A gas pressure adjusting facility in which the gas pressure lowering means is provided with a reflux means for forcibly returning the gas in the secondary side pipe into the primary side pipe. 前記還流手段を構成するに、
前記一次側配管と前記二次側配管とを連通可能なバイパス路に、
前記二次側配管内のガス圧力が前記設定圧力を越えると、前記二次側配管内のガスを前記一次側配管側に向けて通過可能に開弁するリリーフ弁と、
前記リリーフ弁を通過したガスを貯留可能なタンクと、
前記タンクに貯留してあるガスを前記一次側配管内のガス圧力を越えるガス圧力に加圧して前記一次側配管側に向けて吐出可能な加圧装置と、
前記加圧装置から吐出したガスのガス圧力が前記一次側配管内のガス圧力を越えると、そのガスを前記一次側配管側に向けて通過可能に開弁する逆止弁とを、前記二次側配管側から順に設けるとともに、
前記二次側配管内のガス圧力と前記タンク内のガス圧力との差圧が設定差圧以下になると、前記タンクに貯留してあるガスを前記一次側配管内のガス圧力を越えるガス圧力に加圧して前記一次側配管側に向けて吐出するように、前記加圧装置の駆動を制御する制御部を設けて構成してある請求項１記載のガス圧力調整設備。 To constitute the reflux means,
In a bypass path that allows communication between the primary side pipe and the secondary side pipe,
A relief valve that opens when the gas pressure in the secondary side pipe exceeds the set pressure so that the gas in the secondary side pipe can pass toward the primary side pipe side;
A tank capable of storing gas that has passed through the relief valve;
A pressurizing device capable of pressurizing the gas stored in the tank to a gas pressure exceeding the gas pressure in the primary side pipe and discharging the gas toward the primary side pipe;
When the gas pressure of the gas discharged from the pressurization device exceeds the gas pressure in the primary side pipe, a check valve that opens the gas so as to be able to pass toward the primary side pipe side is provided with the secondary valve. In order from the side piping side,
When the differential pressure between the gas pressure in the secondary side pipe and the gas pressure in the tank is equal to or lower than a set differential pressure, the gas stored in the tank is changed to a gas pressure exceeding the gas pressure in the primary side pipe. The gas pressure adjusting equipment according to claim 1, further comprising a control unit configured to control driving of the pressurizing device so as to pressurize and discharge toward the primary pipe side. 前記還流手段を構成するに、
前記一次側配管と前記二次側配管とを連通可能なバイパス路に、
前記二次側配管内のガスを前記一次側配管内のガス圧力を越えるガス圧力に加圧して前記一次側配管側に向けて吐出可能な加圧装置と、
前記加圧装置から吐出したガスのガス圧力が前記一次側配管内のガス圧力を越えると、そのガスを前記一次側配管側に通過可能に開弁する逆止弁とを設けるとともに、
前記二次側配管内のガス圧力が前記設定圧力を越えると、前記二次側配管内のガスを前記一次側配管内のガス圧力を越えるガス圧力に加圧して前記一次側配管側に向けて吐出するように、前記加圧装置の駆動を制御する制御部を設けて構成してある請求項１記載のガス圧力調整設備。 To constitute the reflux means,
In a bypass path that allows communication between the primary side pipe and the secondary side pipe,
A pressurizing device capable of pressurizing the gas in the secondary side pipe to a gas pressure exceeding the gas pressure in the primary side pipe and discharging the gas toward the primary side pipe;
When the gas pressure of the gas discharged from the pressurization device exceeds the gas pressure in the primary side pipe, a check valve is provided to open the gas so that the gas can pass to the primary side pipe side, and
When the gas pressure in the secondary side pipe exceeds the set pressure, the gas in the secondary side pipe is pressurized to a gas pressure exceeding the gas pressure in the primary side pipe and directed toward the primary side pipe side. The gas pressure adjusting equipment according to claim 1, wherein a control unit for controlling driving of the pressurizing device is provided so as to discharge. 前記還流手段を構成するに、
前記一次側配管と前記二次側配管とを連通可能なバイパス路に、前記二次側配管内のガスを前記一次側配管内のガス圧力を越えるガス圧力に加圧して前記一次側配管側に向けて吐出可能な加圧装置を、吐出流量を変更可能に設けるとともに、前記加圧装置から吐出したガスのガス圧力が前記一次側配管内のガス圧力を越えると、そのガスを前記一次側配管側に通過可能に開弁する逆止弁を設け、
前記二次側配管内のガス圧力が前記設定圧力以下のときは、前記二次側配管内のガスを前記一次側配管内のガス圧力を越えるガス圧力に加圧して前記一次側配管側に向けて小さい吐出流量で吐出し、前記二次側配管内のガス圧力が前記設定圧力を越えると、前記二次側配管内のガスを前記一次側配管内のガス圧力を越えるガス圧力に加圧して前記一次側配管側に向けて大きい吐出流量で吐出するように、前記加圧装置の駆動を制御する制御部を設けて構成してある請求項１記載のガス圧力調整設備。 To constitute the reflux means,
In the bypass path that allows the primary side pipe and the secondary side pipe to communicate with each other, the gas in the secondary side pipe is pressurized to a gas pressure that exceeds the gas pressure in the primary side pipe, and is then moved to the primary side pipe side. A pressurizing device capable of discharging toward the discharge side so that the discharge flow rate can be changed, and when the gas pressure of the gas discharged from the pressurizing device exceeds the gas pressure in the primary side piping, the gas is supplied to the primary side piping. There is a check valve that opens on the side to allow passage,
When the gas pressure in the secondary side pipe is equal to or lower than the set pressure, the gas in the secondary side pipe is pressurized to a gas pressure exceeding the gas pressure in the primary side pipe and directed toward the primary side pipe side. If the gas pressure in the secondary pipe exceeds the set pressure, the gas in the secondary pipe is pressurized to a gas pressure that exceeds the gas pressure in the primary pipe. The gas pressure adjusting equipment according to claim 1, further comprising a control unit that controls driving of the pressurizing device so as to discharge at a large discharge flow rate toward the primary side pipe side.
JP2004106067A 2004-03-31 2004-03-31 Gas pressure control facility Pending JP2005293126A (en)

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