JP6587770B1 - Gas supply switching valve and gas supply system for power generation gas engine - Google Patents

Gas supply switching valve and gas supply system for power generation gas engine Download PDF

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JP6587770B1
JP6587770B1 JP2019117933A JP2019117933A JP6587770B1 JP 6587770 B1 JP6587770 B1 JP 6587770B1 JP 2019117933 A JP2019117933 A JP 2019117933A JP 2019117933 A JP2019117933 A JP 2019117933A JP 6587770 B1 JP6587770 B1 JP 6587770B1
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貴弘 山崎
貴弘 山崎
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Rise Pit Co Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract

【課題】都市ガス，ＬＰＧ等のガス燃料にて稼働可能な発電用ガスエンジンに異なるガス供給源から何れか１つの種類のガスを分別し、発電用ガスエンジンにガス燃料を供給するガス供給切替バルブ及びそのガス供給システムを提供する。【解決手段】【請求項１】弁室１４と第１流入路２１と第２流入路２２と共有流出路２３と、共有流入路２４と第１流出路２５と第２流出路２６とを備えたバルブボディＡ1と、切替流入路４１と切替流出路４２とを備え弁室１４に収納される弁体Ａ2と、該弁体Ａ2をバルブボディＡ1に対して切替操作する操作部４３とを備えること。弁体Ａ2の切替によって切替流入路４１及び切替流出路４２は、第１流入路２１と共有流出路２３と共有流入路２４と第１流出路２１を一連とする第１ガス供給流路Ｐ1、又は第２流入路２２と共有流出路２３と共有流入路２４と第２流出路２６を一連とする第２ガス供給流路Ｐ2の何れか一方に切替の構成とすること。【選択図】 図１Gas supply switching for supplying gas fuel to a power generation gas engine by separating any one kind of gas from different gas supply sources into a power generation gas engine operable with gas fuel such as city gas and LPG A valve and its gas supply system are provided. A valve chamber, a first inflow path, a second inflow path, a shared outflow path, a shared inflow path, a first outflow path, and a second outflow path are provided. A valve body A2 having a switching inflow passage 41 and a switching outflow passage 42 and housed in the valve chamber 14; and an operating portion 43 for switching the valve body A2 with respect to the valve body A1. thing. By switching the valve body A2, the switching inflow path 41 and the switching outflow path 42 are a first gas supply flow path P1, in which the first inflow path 21, the shared outflow path 23, the shared inflow path 24, and the first outflow path 21 are arranged in series. Alternatively, the second inflow path 22, the common outflow path 23, the common inflow path 24, and the second outflow path 26 are switched to one of the second gas supply flow paths P2. [Selection] Figure 1

Description

本発明は、都市ガス及びＬＰＧ等の異種のガス燃料にて稼働可能な発電用ガスエンジンに異なるガス供給源から何れか１つの種類のガスを仕切って分別し、発電用ガスエンジンにガス燃料を供給するガス供給切替バルブ及び該ガス供給切替バルブを用いた発電用ガスエンジンのガス供給システムに関する。   The present invention partitions and separates any one kind of gas from different gas supply sources into a power generation gas engine that can be operated with different types of gas fuels such as city gas and LPG, and supplies the gas fuel to the power generation gas engine. The present invention relates to a gas supply switching valve to be supplied and a gas supply system for a power generation gas engine using the gas supply switching valve.

発電用ガスエンジンによる発電機は災害時の非常用や離島での電力供給や、電力の需要が電力会社の供給能力の限界に近くなったときの電力のピークカットに威力を発揮する。ガスエンジンの燃料として、一般的には都市ガス及びＬＰＧ(液化石油ガス)が使用される。都市ガスは、極めて扱い易いものであるし、ＬＰＧはボンベに充填すれば輸送が簡便で安全性が高いものである。また、ガソリンや軽油のように時間の経過とともに変質劣化することもない。   A generator with a gas engine for power generation is useful for emergency use during disasters, power supply on remote islands, and peak cuts when power demand approaches the limit of the power company's supply capacity. As gas engine fuel, city gas and LPG (liquefied petroleum gas) are generally used. City gas is extremely easy to handle, and LPG is easy to transport and highly safe when filled in a cylinder. Moreover, it does not deteriorate and deteriorate over time unlike gasoline and light oil.

特許文献１（特開昭５２-１１３４０８号）には、ＬＰＧエンジンが開示されている。
この種のガスエンジンは、現在では多数存在するものとなった。そして、さらにＬＰＧと共に都市ガスも使用可能な燃料としたエンジンは、特に都市ガスを常用する災害に強い発電用のエンジンとして期待されている。このような、都市ガスとＬＰＧの両方のガス燃料を使用可能としたもガスエンジンでは、都市ガス供給源とＬＰＧ供給源の両方から、何れか一方のみを仕切り、選択し、ガスエンジンにミキサを介して供給する必要がある。 Patent Document 1 (Japanese Patent Laid-Open No. 52-113408) discloses an LPG engine.
Many of these types of gas engines now exist. Further, an engine that uses city gas as well as LPG is expected to be a power generation engine that is particularly resistant to disasters that regularly use city gas. In such a gas engine that can use both city gas and LPG gas fuel, only one of the city gas supply source and the LPG supply source is partitioned and selected, and a mixer is installed in the gas engine. Need to be supplied through.

特開昭５２−１１３４０８号公報JP 52-113408 A

都市ガス供給源とＬＰＧ供給源の両方から、何れか一方のみを流通させ他方を遮断させするようにして仕切り、選択したガス燃料をガスエンジンにミキサを介して供給するためには、２つ異なる種類のガスの流れを仕切るためのバルブが必用である。このバルブには、２つの異なる種類のガスの流れを仕切る役目だけでなく、それぞれのガスを適正な圧力に調整するための装置や、ガスの種類を判別する等の機能も持たせる必要もある。   There are two different ways to partition the city gas supply source and the LPG supply source so that only one of them is circulated and the other is shut off, and the selected gas fuel is supplied to the gas engine via the mixer. A valve is needed to partition the flow of the various gases. In addition to the role of partitioning the flow of two different types of gas, this valve must also have a device for adjusting each gas to an appropriate pressure and a function for determining the type of gas. .

本発明の目的(解決しようとする技術的課題)は、都市ガス及びＬＰＧ等の異種のガス燃料にて稼働可能な発電用ガスエンジンに異なる種類のガスの供給源から何れか１つの種類のガスを仕切って分別し、発電用ガスエンジンに選択したガス燃料を供給するためのガス供給切替バルブ及び該ガス供給切替バルブを用いた発電用ガスエンジンのガス供給システムを提供することにある。   An object (technical problem to be solved) of the present invention is to generate any one kind of gas from a different kind of gas supply source to a power generation gas engine operable with different types of gas fuels such as city gas and LPG. The gas supply switching valve for supplying the selected gas fuel to the power generation gas engine and the gas supply system of the power generation gas engine using the gas supply switching valve are provided.

そこで、発明者は上記課題を解決すべく鋭意，研究を重ねた結果、請求項１の発明を、都市ガス及びＬＰＧの両燃料を使用可能な発電用ガスエンジンに都市ガス或いはＬＰＧを仕切って何れかを供給するガス供給切替バルブであって、弁室と第１流入路と第２流入路と共有流出路と、共有流入路と第１流出路と第２流出路とを備えたバルブボディと、切替流入路と切替流出路とを備え前記弁室に収納される弁体と、該弁体を前記バルブボディに対して切替操作する操作部とを備え、前記弁体の切替操作によって前記切替流入路及び前記切替流出路は、前記第１流入路と前記共有流出路と前記共有流入路と前記第１流出路を一連とする第１ガス供給流路、或いは前記第２流入路と前記共有流出路と前記共有流入路と前記第２流出路を一連とする第２ガス供給流路の何れか一方に切替を行う構成としてなるガス供給切替バルブとしたことにより、上記課題を解決した。   Accordingly, as a result of intensive research and studies to solve the above problems, the inventor divided the city gas or LPG into a power generation gas engine that can use both city gas and LPG fuel. A gas supply switching valve for supplying a valve body, comprising a valve chamber, a first inflow passage, a second inflow passage, a common outflow passage, a common inflow passage, a first outflow passage, and a second outflow passage; A valve body that is provided with a switching inflow path and a switching outflow path and is housed in the valve chamber; and an operation unit that switches the valve body with respect to the valve body, and the switching is performed by switching the valve body. The inflow path and the switching outflow path include the first inflow path, the shared outflow path, the shared inflow path, and the first outflow path as a series, or the second inflow path and the common The outflow channel, the shared inflow channel, and the second outflow channel are a series. By the gas supply switching valve to be either one of the two gas supply channel a structure to perform switching, the above-mentioned problems are eliminated.

請求項２の発明を、請求項１に記載のガス供給切替バルブにおいて、前記弁体が周方向に回転自在に前記バルブボディの前記弁室に配置され、前記弁体は軸方向一端側に前記切替流入路が設けられ、軸方向他方側に前記切替流出路が設けられ、前記操作部の操作により前記弁体は軸周方向に回転され、前記切替流入路と連通可能な位置に前記第１流入路，前記第２流入路及び前記共有流出路が設けられ、前記切替流出路と連通可能な位置に前記第１流出路，前記第２流出路及び前記共有流入路が設けられてなるガス供給切替バルブとしたことにより、上記課題を解決した。
According to a second aspect of the present invention, in the gas supply switching valve according to the first aspect, the valve body is disposed in the valve chamber of the valve body so as to be rotatable in the circumferential direction, and the valve body is disposed at one end side in the axial direction. A switching inflow passage is provided, the switching outflow passage is provided on the other side in the axial direction, and the valve body is rotated in the axial circumferential direction by the operation of the operation portion, and the first in a position where it can communicate with the switching inflow passage. Gas supply in which an inflow path, the second inflow path, and the shared outflow path are provided, and the first outflow path, the second outflow path, and the shared inflow path are provided at a position that allows communication with the switching outflow path By using a switching valve, the above problems were solved.

請求項３の発明を、請求項２に記載のガス供給切替バルブにおいて、前記弁体の前記切替流入路及び前記共有流出路はそれぞれ１本とし、前記バルブボディの前記弁室側で且つ前記共有流出路の開口付近には周方向に沿って凹状の流出内周凹部が設けられ、前記共有流入路の開口付近には周方向に沿って凹状の流入内周凹部が設けられ、前記流出内周凹部を介して前記切替流入路と共有流出路とが連通し、前記流入内周凹部を介して前記共有流入路と前記切替流出路とが連通してなるガス供給切替バルブとしたことにより、上記課題を解決した。   According to a third aspect of the present invention, in the gas supply switching valve according to the second aspect, the switching inflow passage and the common outflow passage of the valve body are each one, the valve body side of the valve body and the shared A concave outflow inner peripheral recess is provided in the vicinity of the opening of the outflow passage along the circumferential direction, and a concave inflow inner peripheral recess is provided in the vicinity of the opening of the shared inflow passage along the circumferential direction. By providing the gas supply switching valve in which the switching inflow path and the shared outflow path communicate with each other through a recess, and the shared inflow path and the switching outflow path communicate with each other through the inflow inner circumferential recess. Solved the problem.

請求項４の発明を、請求項２に記載のガス供給切替バルブにおいて、前記弁体の前記切替流入路及び前記共有流出路はそれぞれ２本とし、前記切替流入路の２本のうちの１方は第１切替流入路部として前記第１流入路と連通可能とし、他方は第２切替流入路部として前記第２流入路と連通可能とし、前記共有流出路の２本のうちの１方は第１切替流出路部として前記第１流出路と連通し、他方は第２切替流出路部として前記第２流出路と連通してなるガス供給切替バルブとしたことにより、上記課題を解決した。   According to a fourth aspect of the present invention, in the gas supply switching valve according to the second aspect, the switching inflow path and the shared outflow path of the valve body are each two, and one of the two switching inflow paths. Is capable of communicating with the first inflow path as a first switching inflow path, and the other is capable of communicating with the second inflow path as a second switching inflow path, and one of the two shared outflow paths is The above problem has been solved by providing a gas supply switching valve that communicates with the first outflow passage as the first switching outflow passage, and the other communicates with the second outflow passage as the second switching outflow passage.

請求項５の発明を、請求項１，２，３又は４の何れか１項に記載のガス供給切替バルブにおいて、前記共有流出路と前記切替流入路との間に低圧調整弁が設けられる回路が具備されてなるガス供給切替バルブとしたことにより、上記課題を解決した。請求項６の発明を、請求項１，２，３，４又は５の何れか１項に記載のガス供給切替バルブにおいて、前記バルブボディには流通するガスの種類を判別するセンサが具備されてなるガス供給切替バルブとしたことにより、上記課題を解決した。   The gas supply switching valve according to any one of claims 1, 2, 3 and 4, wherein the low pressure regulating valve is provided between the shared outflow passage and the switching inflow passage. The above-mentioned problem was solved by using a gas supply switching valve comprising According to a sixth aspect of the present invention, in the gas supply switching valve according to any one of the first, second, third, fourth, and fifth aspects, the valve body is provided with a sensor that determines the type of gas flowing. The above-mentioned problem was solved by using the gas supply switching valve.

請求項７の発明を、都市ガス及びＬＰＧを使用可能な発電用ガスエンジンと、弁室と第１流入路と第２流入路と共有流出路と共有流入路と第１流出路と第２流出路とを備えたバルブボディと、切替流入路と切替流出路とを備え前記弁室に収納される弁体と、該弁体を前記バルブボディに対して切替操作する操作部とを備え、前記弁体の切替操作によって前記切替流入路及び前記切替流出路は、前記第１流入路と前記共有流出路と前記共有流入路と前記第１流出路を一連とする第１ガス供給流路、或いは前記第２流入路と前記共有流出路と前記共有流入路と前記第２流出路を一連とする第２ガス供給流路の何れか一方に切替を行う構成としてなるガス供給切替バルブと、前記発電用ガスエンジンに具備され異なるガスを流入させる第１ガス燃料入口及び第２ガス燃料入口が具備されたミキサと、都市ガス供給源と、ＬＰＧ供給源と、低圧調整弁とを備え、前記都市ガス供給源と前記ガス供給切替バルブにおける前記第１流入路、及び前記ＬＰＧ供給源と前記第２流入路とがそれぞれ連通され、前記ガス供給切替バルブの前記共有流出路と前記切替流入路との間に前記低圧調整弁が配置され、該低圧調整弁は流通するガスを種類に応じて適正な圧力に設定され、前記ガス供給切替バルブの第１流出路は前記ミキサの第１ガス燃料入口に供給され、前記第２流出路は前記ミキサの第２ガス燃料入口に供給されてなる発電用ガスエンジンのガス供給システムとしたことにより、上記課題を解決した。   The invention of claim 7 includes a gas engine for power generation that can use city gas and LPG, a valve chamber, a first inflow passage, a second inflow passage, a common outflow passage, a common inflow passage, a first outflow passage, and a second outflow passage. A valve body including a passage, a valve body that includes a switching inflow path and a switching outflow path, and that is housed in the valve chamber, and an operation unit that switches the valve body with respect to the valve body, The switching inflow passage and the switching outflow passage by the switching operation of the valve body are a first gas supply flow passage including a series of the first inflow passage, the shared outflow passage, the shared inflow passage, and the first outflow passage, or A gas supply switching valve configured to switch to any one of the second inflow path, the shared outflow path, the shared inflow path, and the second outflow path as a series; and the power generation Gas fuel that is provided in a gas engine and flows in different gases A mixer having a port and a second gas fuel inlet, a city gas supply source, an LPG supply source, and a low pressure regulating valve, wherein the first inflow path in the city gas supply source and the gas supply switching valve, And the LPG supply source and the second inflow passage are respectively communicated, and the low pressure regulating valve is disposed between the shared outflow passage and the switching inflow passage of the gas supply switching valve, and the low pressure regulating valve is circulated. The gas to be operated is set to an appropriate pressure according to the type, the first outflow path of the gas supply switching valve is supplied to the first gas fuel inlet of the mixer, and the second outflow path is the second gas fuel of the mixer The above problem was solved by using a gas supply system for a power generation gas engine supplied to the inlet.

請求項８の発明を、請求項７に記載の発電用ガスエンジンのガス供給システムにおいて、ＥＣＵが具備され、前記低圧調整弁は、前記ＥＣＵからの命令にてガス種に応じて適正圧力となるように作動してなる発電用ガスエンジンのガス供給システムとしたことにより、上記課題を解決した。請求項９の発明を、請求項７又は８に記載の発電用ガスエンジンのガス供給システムにおいて、ＥＣＵが具備され、ガス供給切替バルブにはセンサが設けられると共に前記ＥＣＵと繋がり、前記ガス供給切替バルブを通過するガス種を前記センサと前記ＥＣＵにて判別し、その判別結果を前記ミキサに送り該ミキサのガス種に応じた入口を開いてなることを特徴とする発電用ガスエンジンのガス供給システムとしたことにより、上記課題を解決した。   According to an eighth aspect of the present invention, in the gas supply system of the gas engine for power generation according to the seventh aspect, an ECU is provided, and the low-pressure adjusting valve has an appropriate pressure according to a gas type according to a command from the ECU. The above-described problems have been solved by using a gas supply system for a power generation gas engine that operates as described above. According to a ninth aspect of the present invention, in the gas supply system for a power generation gas engine according to the seventh or eighth aspect, the ECU is provided, the gas supply switching valve is provided with a sensor and connected to the ECU, and the gas supply switching is performed. The gas supply of the power generation gas engine is characterized in that the gas type passing through the valve is discriminated by the sensor and the ECU, the discrimination result is sent to the mixer, and the inlet corresponding to the gas type of the mixer is opened. The system has solved the above problems.

請求項１の発明では、本発明においては、ガス供給切替バルブは、簡易な構成にしつつ、都市ガスとＬＰＧ(液化石油ガス)の両方のガス燃料を使用可能な発電用ガスエンジンに対して、ミキサを介して簡易且つ迅速に都市ガス供給源とＬＰＧ供給源からのガスの流入を仕切ることができる。そして低圧調整弁を付属させることも容易にでき、ミキサを介して発電用ガスエンジンに都市ガス或いはＬＰＧ(液化石油ガス)を適正な圧力にして送ることができる。   In the first aspect of the present invention, in the present invention, the gas supply switching valve has a simple configuration, and a power generation gas engine that can use both city gas and LPG (liquefied petroleum gas) gas fuel, The inflow of gas from the city gas supply source and the LPG supply source can be partitioned easily and quickly via the mixer. A low-pressure adjusting valve can be easily attached, and city gas or LPG (liquefied petroleum gas) can be sent to the power generation gas engine through the mixer at an appropriate pressure.

特に、弁体には共有流出路と切替流入路とを設けたもので、実質的には両方が弁体に一体的に設けられたものといえる。そして、弁体の切替操作によって、弁体に設けられた切替流入路及び切替流出路は、第１流入路と共有流出路と共有流入路と第１流出路を一連とする第１ガス供給流路と、第２流入路と共有流出路と共有流入路と第２流出路を一連とする第２ガス供給流路とを構成する。   In particular, the valve body is provided with a shared outflow path and a switching inflow path, and it can be said that both are substantially provided integrally with the valve body. Then, the switching inflow passage and the switching outflow passage provided in the valve body by the switching operation of the valve body are a first gas supply flow including a first inflow passage, a common outflow passage, a common inflow passage, and a first outflow passage. And a second gas supply channel including a second inflow channel, a common outflow channel, a common inflow channel, and a second outflow channel.

そして、ガス供給切替バルブは、前記第１ガス供給流路と、前記第２ガス供給流路とを、何れか一方に切替を行う構成としているので、例えば第１ガス供給流路を都市ガス専用の流路とし、第２ガス供給流路をＬＰＧ(液化石油ガス)専用の流路とした場合に、それぞれの供給源からのガスエンジンへのガス供給の操作ミス(誤操作)を防止できる。   Since the gas supply switching valve is configured to switch between the first gas supply channel and the second gas supply channel, for example, the first gas supply channel is exclusively used for city gas. When the second gas supply channel is a dedicated channel for LPG (liquefied petroleum gas), it is possible to prevent an operation error (erroneous operation) of gas supply from each supply source to the gas engine.

さらに、請求項１の発明では、発電用ガスエンジンには、通常(平時)は、都市ガスを使用し、地震等の災害発生の緊急時において都市ガスの供給が緊急停止してしまったときに、ＬＰＧ(液化石油ガス)供給源からのＬＰＧを発電用ガスエンジンのガス燃料として、災害発生直後から使用可能となり、発電用ガスエンジンを稼働し続けることができるものである。   Furthermore, in the invention of claim 1, when the gas engine for power generation normally uses city gas (normal time) and the supply of city gas is stopped in an emergency such as an earthquake or other disaster, The LPG from the LPG (liquefied petroleum gas) supply source can be used as the gas fuel for the power generation gas engine immediately after the occurrence of the disaster, and the power generation gas engine can continue to operate.

請求項２，請求項３及び請求項４の発明では、弁体がバルブボディの弁室で回転することによって、切替流入路及び共有流出路の方向切替ができる構成によって、構造が極めて簡単で且つ正確に動作させることができる。特に、請求項４の発明では、操作部の操作によって、弁体を回転させたときに、第１ガス供給流路と第２ガス供給流路の両方を同時に遮断することができる位置が存在する。これによって、ガス供給を一時的に停止でき、発電用ガスエンジン，ミキサ等の機器類の点検の際に、その点検作業を極めて効率的にできる。   In the inventions of claim 2, claim 3 and claim 4, the structure is extremely simple and has a structure in which the direction of the switching inflow passage and the common outflow passage can be switched by rotating the valve body in the valve chamber of the valve body. It can be operated accurately. In particular, in the invention of claim 4, there is a position where both the first gas supply channel and the second gas supply channel can be shut off simultaneously when the valve body is rotated by the operation of the operation unit. . As a result, the gas supply can be temporarily stopped, and the inspection work can be made extremely efficient when inspecting equipment such as the power generation gas engine and the mixer.

請求項５の発明では、低圧調整弁が設けられる回路が具備されることによって都市ガスとＬＰＧとの仕切りと共に両ガスを適正な圧力にすることが容易にできる。請求項６の発明では、都市ガスとＬＰＧの仕切りと共に両ガスの判別も同時にできる極めて便利なものにできる。請求項７乃至請求項９では、都市ガス及びＬＰＧ(液化石油ガス)の両方を使用できる発電用ガスエンジンにおける都市ガス及びＬＰＧの仕切りが容易にできる回路を極めて簡単な構成にて行うことができる。   In the invention of claim 5, by providing a circuit provided with a low pressure regulating valve, it is possible to easily bring both gases to an appropriate pressure together with the partition between the city gas and the LPG. According to the sixth aspect of the invention, it is possible to make the gas gas and LPG partitions extremely useful together with the partitioning of the gas and the gas. In the seventh to ninth aspects, a circuit capable of easily partitioning city gas and LPG in a power generation gas engine that can use both city gas and LPG (liquefied petroleum gas) can be performed with a very simple configuration. .

（Ａ）は本発明のガス供給システムの全体図、（Ｂ）は（Ａ）の要部のシステム図である。(A) is a general view of the gas supply system of the present invention, (B) is a system diagram of the main part of (A). （Ａ）は第１ガス供給流路が作動しているシステム図、（Ｂ）は第２ガス供給流路が作動しているシステム図である。(A) is a system diagram in which the first gas supply channel is operating, and (B) is a system diagram in which the second gas supply channel is operating. （Ａ）は第１実施形態のガス供給切替バルブの縦断側面図、（Ｂ）は第１ガス供給流路の作動時の弁体の状態を示す断面図、（Ｃ）は第２ガス供給流路が作動時の弁体の状態を示す断面図である。(A) is a longitudinal side view of the gas supply switching valve of the first embodiment, (B) is a sectional view showing the state of the valve body when the first gas supply flow path is operated, and (C) is a second gas supply flow It is sectional drawing which shows the state of the valve body at the time of a path | route operating. （Ａ）本発明の第２実施形態の横断平面図、（Ｂ）は第２実施形態の縦断側面図である。(A) The cross-sectional top view of 2nd Embodiment of this invention, (B) is a vertical side view of 2nd Embodiment. （Ａ）乃至（Ｃ）は第２実施形態のガス供給切替バルブの弁体の動作を示す断面図である。(A) thru | or (C) is sectional drawing which shows operation | movement of the valve body of the gas supply switching valve of 2nd Embodiment. （Ａ）はミキサの縦断面図、（Ｂ）はミキサの平面図、（Ｃ）はオリフィスの拡大断面図、（Ｄ）はスロットル箇所の拡大図である。(A) is a longitudinal sectional view of the mixer, (B) is a plan view of the mixer, (C) is an enlarged sectional view of an orifice, and (D) is an enlarged view of a throttle part.

以下、本発明の実施形態を図面に基づいて説明する。本発明におけるガス供給切替バルブＡは、発電用ガスエンジンのガス供給システムにおいて、２つの異なる種類のガスをガス燃料として使用することができる発電用ガスエンジンに異なる２種類のガス燃料を切替えて何れか一方のみを供給するものである。種類の異なるガス燃料は、具体的には都市ガス及びＬＰＧ(液化石油ガス)であり、ＬＰＧ(液化石油ガス)は、ＬＰガスとも称する。本発明において使用される発電用ガスエンジンは、往復動内燃機関(エンジン)に分類されるものである。したがって、本発明の発電用ガスエンジンにおいて、ガスタービンエンジンは含まれない。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the gas supply system of the power generation gas engine, the gas supply switching valve A in the present invention can switch between two different types of gas fuels for the power generation gas engine that can use two different types of gas as gas fuel. Only one of them is supplied. The different types of gas fuels are specifically city gas and LPG (liquefied petroleum gas), and LPG (liquefied petroleum gas) is also referred to as LP gas. The power generation gas engine used in the present invention is classified as a reciprocating internal combustion engine (engine). Therefore, the gas turbine engine is not included in the power generation gas engine of the present invention.

本発明における発電用ガスエンジンのガス供給システムでは、ガス供給切替バルブＡによって通常は都市ガスが発電用ガスエンジン７に供給される構成とし、災害発生時等の緊急時では前記都市ガスに代わってＬＰＧ(液化石油ガス)が発電用ガスエンジン７に供給されるものである。   In the gas supply system for a power generation gas engine according to the present invention, city gas is normally supplied to the power generation gas engine 7 by the gas supply switching valve A, and in place of the city gas in the event of an emergency such as a disaster. LPG (liquefied petroleum gas) is supplied to the power generation gas engine 7.

本発明におけるガス供給切替バルブＡが備わるガス供給システムでは、種類の異なる都市ガス供給源９１又はＬＰＧ(液化石油ガス)供給源９２を備え、これらのガス燃料を使用するときにはガス供給切替バルブＡによって、両者が混じることなく、何れか一方のガス燃料を確実にミキサ６を介して発電用ガスエンジン７に供給するものである。また、ガス供給切替バルブＡを使用した発電用ガスエンジンへのガス燃料供給を行うガス供給システムを提供するものである。   The gas supply system provided with the gas supply switching valve A in the present invention includes different types of city gas supply sources 91 or LPG (liquefied petroleum gas) supply sources 92. When these gas fuels are used, the gas supply switching valve A is used. The gas fuel is reliably supplied to the power generation gas engine 7 via the mixer 6 without mixing them. The present invention also provides a gas supply system that supplies gas fuel to a power generation gas engine using the gas supply switching valve A.

まず、初めにガス供給切替バルブＡについて説明する。ガス供給切替バルブＡは、複数の実施形態が存在し、まず第１実施形態から説明する。第１実施形態のガス供給切替バルブＡでは、バルブボディＡ1と、弁体Ａ2と、操作部４３とを備えている（図３参照）。バルブボディＡ1は、筐体状のボディ本体１の内部に弁室１４が形成されている。該弁室１
４は、後述する弁体Ａ2が配置される部屋である（図３参照）。バルブボディＡ1は、本体側部１１，頂部１２及び底部１３を備えている。本体側部１１と、頂部１２と、底部１３とによって、内部に空隙とした弁室１４が構成される（図３参照）。 First, the gas supply switching valve A will be described. The gas supply switching valve A has a plurality of embodiments, and will be described first from the first embodiment. The gas supply switching valve A of the first embodiment includes a valve body A1, a valve body A2, and an operation unit 43 (see FIG. 3). In the valve body A1, a valve chamber 14 is formed inside a housing-like body main body 1. The valve chamber 1
Reference numeral 4 denotes a room in which a later-described valve element A2 is disposed (see FIG. 3). The valve body A1 includes a main body side portion 11, a top portion 12, and a bottom portion 13. The main body side part 11, the top part 12, and the bottom part 13 constitute a valve chamber 14 having a space inside (see FIG. 3).

ボディ本体１の頂部１２には、後述する弁体Ａ2と操作レバー４３２とを連結する操作
用貫通孔１２ａが設けられている。本体側部１１は、筒状をなしており、さらに具体的には円筒状或いは直方体，立方体状の筒体である。弁室１４は、断面円形状の円筒状の空隙室であり、さらに具体的には、円筒状の空隙室である。筒状の本体側部１１の周壁には、ボディ本体１の外部と、内部の弁室１４とを連通する貫通孔状の第１流入路２１と第２流入路２２と共有流出路２３と共有流入路２４と第１流出路２５と第２流出路２６とを備えている（図３参照）。 The top portion 12 of the body body 1 is provided with an operation through hole 12a for connecting a valve body A2 and an operation lever 432 described later. The main body side part 11 has a cylindrical shape, and more specifically, is a cylindrical, rectangular parallelepiped or cubic cylinder. The valve chamber 14 is a cylindrical void chamber having a circular cross section, and more specifically, a cylindrical void chamber. On the peripheral wall of the cylindrical main body side part 11, a through-hole-shaped first inflow path 21, second inflow path 22, and shared outflow path 23 that communicate with the outside of the body main body 1 and the internal valve chamber 14 are shared. An inflow path 24, a first outflow path 25, and a second outflow path 26 are provided (see FIG. 3).

さらに、前記共有流出路２３には、弁室１４の内周側面１４ａにおける開口箇所には、周方向に流出内周凹部２３ａが形成されている（図３参照）。該流出内周凹部２３ａは、弁室１４の内周側面１４ａに周方向に沿う窪み状の溝部として形成された部位であり、共有流出路２３の弁室１４の内周側開口と連通する。そして、切替操作における弁体Ａ2の
回転範囲において、該弁体Ａ2の切替流入路４１の流入側開口４１ｍが、常に前記流出内
周凹部２３ａと連通できる範囲となるように、該流出内周凹部２３ａの周方向における形成範囲が設定される〔図３（Ｂ）参照〕。 Further, in the shared outflow passage 23, an outflow inner peripheral recess 23a is formed in the circumferential direction at an opening portion in the inner peripheral side surface 14a of the valve chamber 14 (see FIG. 3). The outflow inner peripheral recess 23 a is a portion formed as a recessed groove portion along the circumferential direction on the inner peripheral side surface 14 a of the valve chamber 14, and communicates with the inner peripheral side opening of the valve chamber 14 of the common outflow passage 23. Then, in the rotation range of the valve body A2 in the switching operation, the outflow inner circumferential recess 41 is such that the inflow side opening 41m of the switching inflow passage 41 of the valve body A2 is always in a range where it can communicate with the outflow inner circumferential recess 23a. The formation range in the circumferential direction of 23a is set [see FIG. 3 (B)].

さらに、前記共有流入路２４には、弁室１４の内周側面１４ａにおける開口箇所には、周方向に流入内周凹部２４ａが形成されている。該流入内周凹部２４ａは、弁室１４の内周側面１４ａに周方向に沿う窪み状の溝部として形成された部位であり、共有流入路２４の弁室１４の内周側開口と連通する。そして、切替操作における弁体Ａ2の回転範囲にお
いて、該弁体Ａ2の切替流出路４２の排出側開口４２ｍが、常に前記流入内周凹部２４ａ
と連通できる範囲となるように、該流入内周凹部２４ａの周方向における形成範囲が設定される〔図３（Ｃ）参照〕。 Further, in the shared inflow passage 24, an inflow inner peripheral recess 24 a is formed in the circumferential direction at an opening portion in the inner peripheral side surface 14 a of the valve chamber 14. The inflow inner circumferential concave portion 24 a is a portion formed as a concave groove portion along the circumferential direction on the inner circumferential side surface 14 a of the valve chamber 14, and communicates with the inner circumferential side opening of the valve chamber 14 in the common inflow passage 24. Further, in the rotation range of the valve body A2 in the switching operation, the discharge side opening 42m of the switching outflow passage 42 of the valve body A2 always has the inflow inner circumferential recess 24a.
The formation range in the circumferential direction of the inflow inner circumferential recess 24a is set so as to be in a range that can communicate with the air [see FIG. 3C].

第１流入路２１と第２流入路２２と共有流出路１５は、本体側部１１の頂部１２側寄りの位置で且つ同一周上に揃うように配置形成されている。具体的には、第１流入路２１と第２流入路２２と共有流出路１５は、図３（Ａ）において、本体側部１１の高さ(上下)方向の中間よりも上方に位置している。   The first inflow passage 21, the second inflow passage 22, and the common outflow passage 15 are arranged and formed so as to be aligned on the same circumference at a position near the top portion 12 side of the main body side portion 11. Specifically, the first inflow passage 21, the second inflow passage 22, and the common outflow passage 15 are located above the middle in the height (up and down) direction of the main body side portion 11 in FIG. Yes.

また、共有流入路１６と第１流出路２５と第２流出路２６は、底部１３側寄りの位置で同一周上に揃うようにして配置形成されている。具体的には、共有流入路１６と第１流出路２５と第２流出路２６は、図３（Ａ）において、本体側部１１の高さ(上下)方向の中間よりも下方に位置している。   Further, the common inflow path 16, the first outflow path 25, and the second outflow path 26 are arranged and formed so as to be aligned on the same circumference at a position near the bottom 13 side. Specifically, the common inflow passage 16, the first outflow passage 25, and the second outflow passage 26 are positioned below the middle in the height (up and down) direction of the main body side portion 11 in FIG. Yes.

つまり、第１流入路２１と第１流出路２５とは、弁室１４の高さ(上下)方向に沿ってずれる位置に存在し、同様に、第２流入路２２と第２流出路２６についても、弁室１４の高さ(上下)方向に沿ってずれる位置に存在する〔図３（Ａ）参照〕。第１流入路２１，第２流入路２２，共有流出路１５，共有流入路１６，第１流出路２５と第２流出路２６は、ボディ本体１の高さ(上下)方向に対して直交(略直交も含む)する。   That is, the first inflow passage 21 and the first outflow passage 25 exist at positions shifted along the height (vertical) direction of the valve chamber 14, and similarly, the second inflow passage 22 and the second outflow passage 26. Is also present at a position shifted along the height (vertical) direction of the valve chamber 14 (see FIG. 3A). The first inflow passage 21, the second inflow passage 22, the common outflow passage 15, the common inflow passage 16, the first outflow passage 25 and the second outflow passage 26 are orthogonal to the height (vertical) direction of the body body 1 ( Including substantially orthogonal).

また、第１流入路２１と第１流出路２５とは、その流路の方向は同一であり、同様に、第２流入路２２と第２流出路２６についても、その流路の方向は同一である〔図３（Ｂ），（Ｃ）参照〕。そして、第１流入路２１と第１流出路２５の組の流路方向と、第２流入路２２と第２流出路２６との組の流路の方向は異なる。具体的には、第１流入路２１と第１流出路２５は、断面円形の弁室１４の直径中心において角度として約９０度程度異なる位置にある。   The first inflow path 21 and the first outflow path 25 have the same flow path direction. Similarly, the second inflow path 22 and the second outflow path 26 have the same flow path direction. [See FIGS. 3B and 3C]. The flow direction of the set of the first inflow path 21 and the first outflow path 25 is different from the direction of the flow path of the set of the second inflow path 22 and the second outflow path 26. Specifically, the first inflow passage 21 and the first outflow passage 25 are at positions that differ by about 90 degrees as an angle at the diameter center of the valve chamber 14 having a circular cross section.

同様に、第２流入路２２と第２流出路２６についても、断面円形の弁室１４の直径中心において角度として約９０度程度異なる位置にある。また、共有流出路１５と共有流入路１６における流路の方向は、同一である。頂部１２には、操作部４３のための貫通孔１２ａが形成されている。前記第１流入路２１と前記第１流出路２５とは、その流路の方向は同一である。   Similarly, the second inflow path 22 and the second outflow path 26 are also at positions that differ by about 90 degrees as an angle at the diameter center of the valve chamber 14 having a circular cross section. The direction of the flow path in the common outflow path 15 and the common inflow path 16 is the same. A through hole 12 a for the operation part 43 is formed in the top part 12. The first inflow path 21 and the first outflow path 25 have the same flow path direction.

弁体Ａ2は、弁本体部３と、切替流入路４１と、切替流出路４２とからなる。そして、
弁本体部３に切替流入路４１と切替流出路４２とが軸芯線Ｌに沿ってずれるような位置関係で形成されている〔図３（Ａ）参照〕。弁本体部３は、円筒形状に形成されている。その円筒形状とした弁本体部３の軸方向に軸芯線Ｌを設定し、該軸芯線Ｌを回転中心として弁室１４内で回転可能な構成となっている。弁体Ａ2の弁本体部３の外周３ａは、バルブ
ボディＡ1の弁室１４の内周側壁面に密着しつつ且つ円滑に回転することができる構成と
なっている。 The valve body A2 includes a valve main body 3, a switching inflow passage 41, and a switching outflow passage 42. And
A switching inflow passage 41 and a switching outflow passage 42 are formed in the valve body 3 in such a positional relationship that they are displaced along the axis L (see FIG. 3A). The valve main body 3 is formed in a cylindrical shape. An axial core line L is set in the axial direction of the cylindrical valve main body 3, and the shaft core line L can be rotated in the valve chamber 14 around the rotational axis. The outer periphery 3a of the valve body 3 of the valve body A2 is configured to be able to rotate smoothly while being in close contact with the inner peripheral side wall surface of the valve chamber 14 of the valve body A1.

弁本体部３は、軸方向に直交する断面が略真円であり、前記切替流入路４１と前記切替流出路４２は、弁本体部３の軸方向に直交し、且つ断面円形の直径中心を通過する直線状の貫通孔である。切替流入路４１と切替流出路４２とは、弁本体部３の軸方向において相互にずれた位置にあり、具体的には切替流入路４１が弁本体部３の上下方向の上端寄りに位置し、切替流出路４２が下端寄りの位置に形成され、両者は交わらない〔図３(Ａ)参照〕。また、切替流入路４１と切替流出路４２との流路の方向は同一である（図３参照）。ここで、弁本体部３の上端側を弁上段側と称し、下端側を弁下段側と称する。   The valve body 3 has a substantially circular cross section orthogonal to the axial direction, and the switching inflow passage 41 and the switching outflow passage 42 are perpendicular to the axial direction of the valve main body 3 and have a circular diameter center. It is a straight through hole that passes through. The switching inflow path 41 and the switching outflow path 42 are at positions shifted from each other in the axial direction of the valve body 3, and specifically, the switching inflow path 41 is positioned near the upper end in the vertical direction of the valve body 3. The switching outflow path 42 is formed at a position near the lower end, and the two do not intersect (see FIG. 3A). Moreover, the direction of the flow path of the switching inflow path 41 and the switching outflow path 42 is the same (refer FIG. 3). Here, the upper end side of the valve body 3 is referred to as the valve upper stage side, and the lower end side is referred to as the valve lower stage side.

弁体Ａ2の弁本体部３には、操作部４３が設けられている。該操作部４３は、バルブボ
ディＡ1に対して、弁体Ａ2をバルブボディＡ1の外部より回転操作する役目をなすもので
ある。操作部４３は、操作軸４３１と操作レバー４３２とからなる。操作軸４３１は、弁体Ａ2の軸方向に沿って弁本体部３の軸方向一端から突出するように形成された軸部材で
ある。操作軸４３１の軸端箇所には、操作レバー４３２が設けられている。 An operation unit 43 is provided in the valve body 3 of the valve body A2. The operating portion 43 serves to rotate the valve body A2 from the outside of the valve body A1 with respect to the valve body A1. The operation unit 43 includes an operation shaft 431 and an operation lever 432. The operation shaft 431 is a shaft member formed so as to protrude from one axial end of the valve main body 3 along the axial direction of the valve body A2. An operation lever 432 is provided at the end of the operation shaft 431.

該操作レバー４３２は、レバー部４３２ａとボス部４３２ｂとから構成され、該ボス部４３２ｂに操作軸４３１が貫通し、両者は相互に固着されている。具体的には、操作軸４３１の軸端付近に螺子部が設けられ、該螺子部と螺合するナット４３３が具備され、該ナット４３３の締付によって、操作軸４３１と操作レバー４３２とが固着される。   The operation lever 432 includes a lever portion 432a and a boss portion 432b. An operation shaft 431 passes through the boss portion 432b, and both are fixed to each other. Specifically, a screw portion is provided in the vicinity of the shaft end of the operation shaft 431, and a nut 433 that is screwed with the screw portion is provided. By tightening the nut 433, the operation shaft 431 and the operation lever 432 are fixed to each other. Is done.

弁体Ａ2は、バルブボディＡ1の弁室１４内に配置される。そして、弁体Ａ2は、バルブ
ボディＡ1の外部から操作レバー４３２の回転操作によって、バルブボディＡ1の弁室１４内で回転させることができる。操作部４３の操作レバー４３２を操作することによって、弁体Ａ2は弁室１４内にて軸芯線Ｌを回転中心として回転する。 The valve body A2 is disposed in the valve chamber 14 of the valve body A1. The valve body A2 can be rotated in the valve chamber 14 of the valve body A1 by rotating the operation lever 432 from the outside of the valve body A1. By operating the operation lever 432 of the operation unit 43, the valve body A2 rotates around the axis L in the valve chamber 14.

弁体Ａ2の軸芯線Ｌとは、該弁体Ａ2がバルブボディＡ1の弁室１４内を回転するときの
回転中心軸となる線のことである。このように、弁体Ａ2には、弁本体部３に切替流入路
４１と切替流出路４２が一体的に形成されている。これによって、作業員による操作部４３の一度の操作で、第１ガス供給流路Ｐ1と第２ガス供給流路Ｐ2との流路の切替操作を行うことができ、しかも、誤操作を防止できるものである。 The axis L of the valve body A2 is a line that serves as a rotation center axis when the valve body A2 rotates in the valve chamber 14 of the valve body A1. As described above, the valve body A 2 is integrally formed with the switching inflow path 41 and the switching outflow path 42 in the valve body 3. As a result, the operator can switch the flow path between the first gas supply flow path P1 and the second gas supply flow path P2 with a single operation of the operation unit 43, and can prevent erroneous operation. It is.

本発明のガス供給切替バルブＡは、２つの種類の異なるガス燃料を状況に応じて使い分けて稼働する発電用ガスエンジンのガス供給システムに適用される。まず、異なる種類のガス(都市ガス又はＬＰＧ)の切替仕切りを行い、要求されるガス燃料をミキサ６を介して発電用ガスエンジン７に供給する。そして、ガス供給切替バルブＡは、ガス供給システムにおいて第１ガス供給流路Ｐ1と第２ガス供給流路Ｐ2と低圧調整流路Ｐcとを構成する。   The gas supply switching valve A of the present invention is applied to a gas supply system of a power generation gas engine that operates using two different types of gas fuels depending on the situation. First, different types of gas (city gas or LPG) are switched and the required gas fuel is supplied to the power generation gas engine 7 via the mixer 6. The gas supply switching valve A constitutes a first gas supply flow path P1, a second gas supply flow path P2, and a low pressure adjustment flow path Pc in the gas supply system.

第１ガス供給流路Ｐ1は、都市ガス供給源９１からミキサ６に都市ガスを供給する供給
流路を構成するものであり、第１流入路２１，切替流入路４１，共有流出路１５，共有流入路１６，切替流出路４２，第１流出路２５及び第１吸入流路６３１とを一連とする流路を構成する〔図１，図２(Ａ)参照〕。また、第２ガス供給流路Ｐ2は、ＬＰＧ(液化石油ガス)供給源９２からミキサ６にＬＰＧ(液化石油ガス)を供給する供給流路を構成するもの
であり、第２流入路２２，切替流入路４１，共有流出路１５，共有流入路１６，切替流出路４２，第２流出路２６及び第２吸入流路６４１とを一連とする流路を構成する。 The first gas supply flow path P1 constitutes a supply flow path for supplying city gas from the city gas supply source 91 to the mixer 6, and includes a first inflow passage 21, a switching inflow passage 41, a shared outflow passage 15, The inflow path 16, the switching outflow path 42, the first outflow path 25, and the first suction flow path 631 are configured as a series [see FIGS. 1 and 2A]. The second gas supply flow path P2 constitutes a supply flow path for supplying LPG (liquefied petroleum gas) from the LPG (liquefied petroleum gas) supply source 92 to the mixer 6, and the second inflow path 22 is switched. The inflow path 41, the shared outflow path 15, the shared inflow path 16, the switching outflow path 42, the second outflow path 26, and the second suction flow path 641 are configured as a series.

ここで、都市ガスは、枝管，ガス管等の配管から供給される。また、ＬＰＧ(液化石油ガス)供給源９２は、ＬＰＧ（液化石油ガス）がガスボンベ９２ａに充填され、このガスボンベ９２ａが設置される。さらに、ガスボンベ９２ａには手動バルブ９２ｂが設けられている。そして、ＬＰＧ(液化石油ガス)のガスボンベ９２ａは、都市ガスの供給が停止したときの緊急時における非常用のものであり、都市ガスが復旧するまでの期間を補完できるものである。   Here, city gas is supplied from piping, such as a branch pipe and a gas pipe. The LPG (liquefied petroleum gas) supply source 92 is filled with LPG (liquefied petroleum gas) in a gas cylinder 92a, and this gas cylinder 92a is installed. Further, a manual valve 92b is provided in the gas cylinder 92a. The LPG (liquefied petroleum gas) gas cylinder 92a is an emergency for emergency when the supply of city gas is stopped, and can complement the period until the city gas is restored.

また、共有流出路１５と共有流入路１６との間には低圧調整流路Ｐcが具備される。該
低圧調整流路Ｐcには低圧調整弁５が設けられている。低圧調整流路Ｐcは、第１ガス供給流路Ｐ1と第２ガス供給流路Ｐ2とにおいて共通の流路となる。つまり第１ガス供給流路Ｐ1と第２ガス供給流路Ｐ2は共に共通の低圧調整流路Ｐcを有するものである〔図１，図２(Ｂ)参照〕。 Further, a low pressure adjusting flow path Pc is provided between the shared outflow path 15 and the shared inflow path 16. A low pressure adjusting valve 5 is provided in the low pressure adjusting flow path Pc. The low-pressure adjustment channel Pc is a common channel in the first gas supply channel P1 and the second gas supply channel P2. That is, the first gas supply flow path P1 and the second gas supply flow path P2 both have a common low-pressure adjustment flow path Pc [see FIGS. 1 and 2B].

換言すれば、低圧調整流路Ｐcは、ガス供給切替バルブＡにより第１ガス供給流路Ｐ１
が選択されているときには、低圧調整流路Ｐcは第１ガス供給流路Ｐ1の一部を構成する流路に含まれる〔図２(Ａ)参照〕。第２ガス供給流路Ｐ2が選択されているときには、低圧
調整流路Ｐcは第２ガス供給流路Ｐ2の一部を構成する流路に含まれる〔図２(Ｂ)参照〕。そして、都市ガス供給源９１或いはＬＰＧ(液化石油ガス)供給源９２からのそれぞれのガスは、この低圧調整流路Ｐcを通過し、低圧調整弁５によって適正な圧力に設定され、後
述するミキサ及びガスエンジンにガス燃料を供給する。 In other words, the low pressure adjustment flow path Pc is defined by the first gas supply flow path P1 by the gas supply switching valve A.
Is selected, the low-pressure adjusting flow path Pc is included in a flow path constituting a part of the first gas supply flow path P1 [see FIG. 2 (A)]. When the second gas supply flow path P2 is selected, the low pressure adjustment flow path Pc is included in a flow path constituting a part of the second gas supply flow path P2 [see FIG. 2 (B)]. Each gas from the city gas supply source 91 or the LPG (liquefied petroleum gas) supply source 92 passes through the low-pressure adjustment flow path Pc and is set to an appropriate pressure by the low-pressure adjustment valve 5. Gas fuel is supplied to the gas engine.

次に、ガス供給切替バルブＡの第２実施形態を説明する。この第２実施形態では、弁体Ａ2が第１実施形態のガス供給切替バルブＡの弁体Ａ2とは構成が異なるものである。バルブボディＡ1については、第１実施形態と略同等である。第２実施形態における弁体Ａ2の切替流入路４１及び切替流出路４２をそれぞれ２本としたものが存在する（図４，図５参照）。   Next, a second embodiment of the gas supply switching valve A will be described. In the second embodiment, the configuration of the valve body A2 is different from that of the valve body A2 of the gas supply switching valve A of the first embodiment. The valve body A1 is substantially the same as in the first embodiment. There are two switching inflow passages 41 and switching outflow passages 42 of the valve body A2 in the second embodiment (see FIGS. 4 and 5).

具体的には、切替流入路４１は、第１切替流入路部４１ａと第２切替流入路部４１ｂを有し、切替流出路４２は第１切替流出路部４２ａと第２切替流出路部４２ｂとを有する。第１切替流入路部４１ａと第２切替流入路部４１ｂは、弁本体部３の弁上段側に位置し軸芯線Ｌを介して左右対称に設けられている。また、第１切替流出路部４２ａと第２切替流出路部４２ｂとは弁本体部３の弁下段側に位置し軸芯線Ｌを介して左右対称に設けられている（図５参照）。   Specifically, the switching inflow channel 41 has a first switching inflow channel 41a and a second switching inflow channel 41b, and the switching outflow channel 42 is a first switching outflow channel 42a and a second switching outflow channel 42b. And have. The first switching inflow passage portion 41a and the second switching inflow passage portion 41b are located on the valve upper stage side of the valve main body portion 3 and are provided symmetrically with respect to the axis L. Moreover, the 1st switching outflow path part 42a and the 2nd switching outflow path part 42b are located in the valve lower stage side of the valve main-body part 3, and are provided left-right symmetrically via the axial center line L (refer FIG. 5).

そして、他の構成は、前述した第１実施形態のガス供給切替バルブＡの構成と略同様である。この第２実施形態では、第１ガス供給流路Ｐ1は、第１流入路２１，第１切替流入
路部４１ａ，共有流出路１５，共有流入路１６，第１切替流出路部４２ａ，第１流出路２５とを一連とする流路を構成する。また、第２ガス供給流路Ｐ2は、第２流入路２２，第２切替流入路部４１ｂ，共有流出路１５，共有流入路１６，第２切替流出路部４２ｂ，第２流出路２６とを一連とする流路を構成する。 The other configuration is substantially the same as the configuration of the gas supply switching valve A of the first embodiment described above. In the second embodiment, the first gas supply flow path P1 includes the first inflow path 21, the first switching inflow path section 41a, the shared outflow path 15, the shared inflow path 16, the first switching outflow path section 42a, and the first. A flow path including a series of outflow paths 25 is formed. The second gas supply flow path P2 includes the second inflow path 22, the second switching inflow path section 41b, the shared outflow path 15, the shared inflow path 16, the second switching outflow path section 42b, and the second outflow path 26. A series of flow paths is configured.

第１ガス供給流路Ｐ1と第２ガス供給流路Ｐ2とは、前述したように、操作部４３の操作レバー４３２により２つの流路の切替ができる。ここで、第１ガス供給流路Ｐ1を、都市
ガス専用とし、第２ガス供給流路Ｐ2をＬＰＧ(液化石油ガス)専用とする。また、第２実
施形態において操作部４３の操作レバー４３２を操作して第１ガス供給流路Ｐ1と第２ガ
ス供給流路Ｐ2との流路を切替える際に、第１ガス供給流路Ｐ1と第２ガス供給流路Ｐ2と
の何れも遮断される操作レバー４３２の位置が存在する。 As described above, the first gas supply channel P1 and the second gas supply channel P2 can be switched between the two channels by the operation lever 432 of the operation unit 43. Here, the first gas supply channel P1 is dedicated to city gas, and the second gas supply channel P2 is dedicated to LPG (liquefied petroleum gas). In the second embodiment, when the operation lever 432 of the operation unit 43 is operated to switch the flow path between the first gas supply flow path P1 and the second gas supply flow path P2, the first gas supply flow path P1 and There is a position of the operation lever 432 where both of the second gas supply flow paths P2 are blocked.

この位置は、都市ガス及びＬＰＧ(液化石油ガス)の両方の流れを一度に停止できる。これによって、操作部４３の操作４３２によって、弁体Ａ2を回転操作させることで、第1ガス供給流路Ｐ1と第２ガス供給流路Ｐ2の両方を同時に遮断することができ、両ガスの供給を一時的に停止させ、発電用ガスエンジン７，ミキサ６等の機器類の点検の際に、その点検作業を極めて効率的にできる。   This position can stop both city gas and LPG (liquefied petroleum gas) flows at once. Thus, by rotating the valve body A2 by the operation 432 of the operation unit 43, both the first gas supply flow path P1 and the second gas supply flow path P2 can be shut off simultaneously, and both gases are supplied. Is temporarily stopped, and the inspection work can be made extremely efficient when inspecting equipment such as the power generation gas engine 7 and the mixer 6.

ミキサ６は、ミキサボディ６１に、燃料ジェット６２を備えた第１燃料入りロ６３及び第２燃料入りロ６４が設けられている。第１燃料入りロ６３は、都市ガス専用の吸入口であり、ガス供給切替バルブＡの第１流出路２５と第１吸入流路６３１によって連通されている。つまり、第１ガス供給流路Ｐ1はミキサ６の第１燃料入りロ６３までの第１吸入流
路６３１を含む〔図１，図２(Ａ)参照〕。また、第２燃料入りロ６４は、ＬＰＧ(液化石
油ガス)専用であり、ガス供給切替バルブＡの第２流出路２６と連通している。つまり、
第２ガス供給流路Ｐ2はミキサ６の第２燃料入りロ６４までの第２吸入流路６４１を含む
〔図１，図２(Ｂ)参照〕。 In the mixer 6, a first fuel-filled rod 63 and a second fuel-filled rod 64 provided with a fuel jet 62 are provided in a mixer body 61. The first fuel-containing rod 63 is a suction port dedicated to city gas, and is communicated with the first outflow passage 25 of the gas supply switching valve A and the first suction passage 631. That is, the first gas supply flow path P1 includes the first suction flow path 631 up to the first fuel-filled flow 63 of the mixer 6 (see FIGS. 1 and 2A). Further, the second fuel-filled rod 64 is dedicated to LPG (liquefied petroleum gas) and communicates with the second outflow passage 26 of the gas supply switching valve A. That means
The second gas supply flow path P2 includes a second suction flow path 641 up to the second fuel-filling port 64 of the mixer 6 (see FIGS. 1 and 2B).

ミキサボディ６１内部には、スロットル６５が軸支されたスロットルシャフト６５ａに固着されて開閉自在に取り付けられている〔図６(Ａ)，（Ｄ）参照〕。また、ミキサボディ６１には、アイドル燃料流量調整用のニードル６６で調整可能に構成されている。本発明におけるミキサ６は、前述したように、第１燃料入りロ６３及び第２燃料入りロ６４を有し、それぞれがガス供給切替バルブＡと別々に連通し、ガス供給切替バルブＡの切替操作によって選択された第１ガス供給流路Ｐ1又は第２ガス供給流路Ｐ2の何れか一方のみからのガス燃料を吸入し、発電用ガスエンジン７にガス燃料を供給するものである。   Inside the mixer body 61, a throttle 65 is fixed to a throttle shaft 65a that is pivotally supported, and is attached to be freely opened and closed (see FIGS. 6A and 6D). The mixer body 61 is configured to be adjustable with a needle 66 for adjusting the idle fuel flow rate. As described above, the mixer 6 in the present invention has the first fuel-filled rod 63 and the second fuel-filled rod 64, each of which communicates separately with the gas supply switching valve A, and the switching operation of the gas supply switching valve A. The gas fuel from only one of the first gas supply flow path P1 and the second gas supply flow path P2 selected by the above is sucked and the gas fuel is supplied to the power generation gas engine 7.

ミキサ６は、通常又は平時においては、ガス供給切替バルブＡによって第１ガス供給流路Ｐ1と連通し、第２ガス供給流路Ｐ2とは遮断されている。そして、ミキサ６の第１燃料入りロ６３から都市ガスを吸入し、発電用ガスエンジン７に都市ガスを供給する。災害発生等の緊急時では、ガス供給切替バルブＡの切替操作によって、第１ガス供給流路Ｐ1が
遮断され、第２ガス供給流路Ｐ2が開通してＬＰＧ(液化石油ガス)がミキサ６の第２燃料
入りロ６４から吸入され、発電用ガスエンジン７にＬＰＧ(液化石油ガス)を供給する。 During normal or normal times, the mixer 6 communicates with the first gas supply flow path P1 by the gas supply switching valve A and is disconnected from the second gas supply flow path P2. Then, the city gas is sucked from the first fuel-containing rod 63 of the mixer 6, and the city gas is supplied to the power generation gas engine 7. In an emergency such as the occurrence of a disaster, the gas supply switching valve A is switched to shut off the first gas supply flow path P1, the second gas supply flow path P2 is opened, and LPG (liquefied petroleum gas) is fed into the mixer 6. LPG (liquefied petroleum gas) is supplied to the power generation gas engine 7 by being sucked from the second fuel-containing tank 64.

本発明のガス供給切替バルブを備えた発電用ガスエンジンのガス供給システムの構成を説明する（図１，図２参照）。このシステムには、ＥＣＵ(エンジンコントロールユニッ
ト)８が具備されており、ガス供給切替バルブＡのバルブボディＡ1には、流通するガス燃料の種類を判別するセンサ８１が具備されている。該センサ８１によってＥＣＵ８は、ガスの種別、つまり都市ガス又はＬＰＧ(液化石油ガス)であるか否かを判断する。 The structure of the gas supply system of the power generation gas engine provided with the gas supply switching valve of the present invention will be described (see FIGS. 1 and 2). This system includes an ECU (engine control unit) 8, and a valve body A 1 of the gas supply switching valve A is provided with a sensor 81 for determining the type of gas fuel flowing. The sensor 81 determines whether the ECU 8 is a gas type, that is, whether it is city gas or LPG (liquefied petroleum gas).

本発明では、システム内に都市ガス供給源９１とＬＰＧ(液化石油ガス)供給源９２とが備わっている。そして、ガス供給切替バルブＡは、都市ガス供給源９１及びＬＰＧ(液化
石油ガス)供給源９２の両方と連通されており、ガス供給切替バルブＡの操作部４３の操
作レバー４３２の切替操作によって、流路が切替えられて仕切られ第１ガス供給流路Ｐ1
又は第２ガス供給流路Ｐ2の何れか一方のみが開通され、他方は遮断される。ガス供給切
替バルブＡにおける操作部４３の操作レバー４３２の操作は、作業員により人為的に行われる。 In the present invention, a city gas supply source 91 and an LPG (liquefied petroleum gas) supply source 92 are provided in the system. The gas supply switching valve A is in communication with both the city gas supply source 91 and the LPG (liquefied petroleum gas) supply source 92, and by the switching operation of the operation lever 432 of the operation unit 43 of the gas supply switching valve A, The flow path is switched and partitioned, and the first gas supply flow path P1
Alternatively, only one of the second gas supply flow paths P2 is opened and the other is blocked. The operation of the operation lever 432 of the operation unit 43 in the gas supply switching valve A is manually performed by a worker.

ここでは、第１ガス供給流路Ｐ1は、都市ガス専用とし、第２ガス供給流路Ｐ2はＬＰＧ(液化石油ガス)専用としている。通常時は、発電用ガスエンジン７には、都市ガスが使用され、ガス供給切替バルブＡは、第１ガス供給流路Ｐ1を開通状態とし、都市ガスは、ミ
キサ６の第１燃料入りロ６３を介して発電用ガスエンジン７に供給される。そして、通常時においては、ガス供給切替バルブＡは、第２ガス供給流路Ｐ2を遮断状態としている〔
図２(Ａ)，（Ｂ）参照〕。 Here, the first gas supply channel P1 is dedicated to city gas, and the second gas supply channel P2 is dedicated to LPG (liquefied petroleum gas). In normal times, city gas is used for the power generation gas engine 7, the gas supply switching valve A opens the first gas supply flow path P 1, and the city gas enters the first fuel-filled gas 63 of the mixer 6. Is supplied to the power generation gas engine 7. In the normal state, the gas supply switching valve A is in a state of blocking the second gas supply flow path P2.
(See FIGS. 2A and 2B).

緊急時には、都市ガスは供給を停止する。緊急時とは具体的には地震等の災害発生時である。このときには、ＬＰＧ（液化石油ガス）供給源９２のガスボンベ９２ａの手動バルブ９２ｂを開き、次いで、ガス供給切替バルブＡの操作部４３の操作レバー４３２を操作して、第１ガス供給流路Ｐ1から第２ガス供給流路Ｐ2に切り替え、第１ガス供給流路Ｐ1
を遮断し、第２ガス供給流路Ｐ2を開通させる。これによって、ＬＰＧ(液化石油ガス)は
、ミキサ６の第２燃料入りロ６４を介して発電用ガスエンジン７に供給される。 In an emergency, city gas will stop supplying. An emergency is specifically when a disaster such as an earthquake occurs. At this time, the manual valve 92b of the gas cylinder 92a of the LPG (liquefied petroleum gas) supply source 92 is opened, and then the operation lever 432 of the operation unit 43 of the gas supply switching valve A is operated to remove from the first gas supply flow path P1. Switching to the second gas supply flow path P2, the first gas supply flow path P1
And the second gas supply flow path P2 is opened. As a result, LPG (liquefied petroleum gas) is supplied to the power generation gas engine 7 via the second fuel-containing column 64 of the mixer 6.

そして、発電用ガスエンジン７は、通常では該発電用ガスエンジン７が吸入する空気は図示しないエアクリーナのフィルタで濾過されてミキサ６に吸入される。ミキサ６には、ガス供給切替バルブＡの切替操作によって仕切られた都市ガス又はＬＰＧ(液化石油ガス)の何れか一方が低圧調整流路Ｐcの低圧調整弁５を通過することによって減圧されたガス
燃料が流入し、ここで、混合されて吸気マニホールド７１を通ってエンジン７に吸入される。排気は排気マニホールド７１から三元触媒７２を通ってマフラ(図示せず)に入り消音して大気に放出される。 In the power generation gas engine 7, normally, the air sucked by the power generation gas engine 7 is filtered by a filter of an air cleaner (not shown) and sucked into the mixer 6. In the mixer 6, either the city gas or LPG (liquefied petroleum gas) partitioned by the switching operation of the gas supply switching valve A is decompressed by passing through the low pressure regulating valve 5 of the low pressure regulating channel Pc. Fuel flows in, where it is mixed and drawn into the engine 7 through the intake manifold 71. The exhaust gas enters the muffler (not shown) from the exhaust manifold 71 through the three-way catalyst 72, is silenced, and is released to the atmosphere.

Ａ…ガス供給切替バルブ、Ａ1…バルブボディ、Ａ2…弁体、１４…弁室、
１５…共有流出路、１６…共有流入路、２１…第１流入路、２２…第２流入路、
２３…共有流出路、２３ａ…流出内周凹部、２４…共有流入路、２４ａ…流入内周凹部、２５…第１流出路、２６…第２流出路、４１…切替流入路、４１ａ…第１切替流入路部、４１ｂ…第２切替流入路部、４２…切替流出路、４２ａ…第１切替流出路部、
４２ｂ…第２切替流出路部、４３…操作部、５…低圧調整弁、６…ミキサ、
７…発電用ガスエンジン、８…ＥＣＵ、８１…センサ、９１…都市ガス供給源、
９２…ＬＰＧ（液化石油ガス）供給源、Ｐ1…第１ガス供給流路、
Ｐ2…第２ガス供給流路、Ｐc…低圧調整流路。 A ... Gas supply switching valve, A1 ... Valve body, A2 ... Valve body, 14 ... Valve chamber,
15 ... Shared outflow path, 16 ... Shared inflow path, 21 ... First inflow path, 22 ... Second inflow path,
23 ... Shared outflow channel, 23a ... Outflow inner circumferential recess, 24 ... Shared inflow channel, 24a ... Inflow inner circumferential recess, 25 ... First outflow channel, 26 ... Second outflow channel, 41 ... Switching inflow channel, 41a ... First Switching inflow channel portion, 41b ... second switching inflow channel portion, 42 ... switching outflow channel, 42a ... first switching outflow channel portion,
42b ... 2nd switching outflow channel part, 43 ... operation part, 5 ... low pressure regulating valve, 6 ... mixer,
7 ... Gas engine for power generation, 8 ... ECU, 81 ... Sensor, 91 ... City gas supply source,
92 ... LPG (liquefied petroleum gas) supply source, P1 ... first gas supply flow path,
P2 ... second gas supply passage, Pc ... low pressure adjustment passage.

Claims (9)

都市ガス及びＬＰＧの両燃料を使用可能な発電用ガスエンジンに都市ガス或いはＬＰＧを仕切って何れかを供給するガス供給切替バルブであって、
弁室と第１流入路と第２流入路と共有流出路と、共有流入路と第１流出路と第２流出路とを備えたバルブボディと、切替流入路と切替流出路とを備え前記弁室に収納される弁体と、該弁体を前記バルブボディに対して切替操作する操作部とを備え、
前記弁体の切替操作によって前記切替流入路及び前記切替流出路は、前記第１流入路と前記共有流出路と前記共有流入路と前記第１流出路を一連とする第１ガス供給流路、或いは前記第２流入路と前記共有流出路と前記共有流入路と前記第２流出路を一連とする第２ガス供給流路の何れか一方に切替を行う構成としてなることを特徴とするガス供給切替バルブ。 A gas supply switching valve for partitioning city gas or LPG into a power generation gas engine capable of using both city gas and LPG fuel;
A valve body including a valve chamber, a first inflow path, a second inflow path, a shared outflow path, a shared inflow path, a first outflow path, and a second outflow path; and a switching inflow path and a switching outflow path. A valve body housed in the valve chamber, and an operation unit for switching the valve body with respect to the valve body,
The switching inflow path and the switching outflow path by the switching operation of the valve body are a first gas supply flow path including a series of the first inflow path, the shared outflow path, the shared inflow path, and the first outflow path, Alternatively, the gas supply is configured to switch to any one of the second inflow path, the shared outflow path, the shared inflow path, and the second outflow path in a series. Switching valve. 請求項１に記載のガス供給切替バルブにおいて、前記弁体が周方向に回転自在に前記バルブボディの前記弁室に配置され、前記弁体は軸方向一端側に前記切替流入路が設けられ、軸方向他方側に前記切替流出路が設けられ、前記操作部の操作により前記弁体は軸周方向に回転され、前記切替流入路と連通可能な位置に前記第１流入路，前記第２流入路及び前記共有流出路が設けられ、前記切替流出路と連通可能な位置に前記第１流出路，前記第２流出路及び前記共有流入路が設けられてなることを特徴とするガス供給切替バルブ。 The gas supply switching valve according to claim 1, wherein the valve body is disposed in the valve chamber of the valve body so as to be rotatable in the circumferential direction, and the valve body is provided with the switching inflow passage on one end side in the axial direction. The switching outflow passage is provided on the other side in the axial direction, the valve body is rotated in the axial circumferential direction by the operation of the operation portion, and the first inflow passage and the second inflow passage are arranged at positions where they can communicate with the switching inflow passage. A gas supply switching valve, characterized in that a first outflow passage, a second outflow passage, and the common inflow passage are provided at a position where the passage and the common outflow passage are provided, and are communicated with the switching outflow passage. . 請求項２に記載のガス供給切替バルブにおいて、前記弁体の前記切替流入路及び前記共有流出路はそれぞれ１本とし、前記バルブボディの前記弁室側で且つ前記共有流出路の開口付近には周方向に沿って凹状の流出内周凹部が設けられ、前記共有流入路の開口付近には周方向に沿って凹状の流入内周凹部が設けられ、前記流出内周凹部を介して前記切替流入路と共有流出路とが連通し、前記流入内周凹部を介して前記共有流入路と前記切替流出路とが連通してなることを特徴とするガス供給切替バルブ。   3. The gas supply switching valve according to claim 2, wherein each of the switching inflow passage and the common outflow passage of the valve body is one, and is located on the valve chamber side of the valve body and in the vicinity of the opening of the common outflow passage. A concave outflow inner peripheral recess is provided along the circumferential direction, and a concave inflow inner peripheral recess is provided in the vicinity of the opening of the common inflow passage along the circumferential direction, and the switching inflow is performed through the outflow inner peripheral recess. A gas supply switching valve, characterized in that a channel and a shared outflow channel communicate with each other, and the shared inflow channel and the switching outflow channel communicate with each other via the inflow inner circumferential recess. 請求項２に記載のガス供給切替バルブにおいて、前記弁体の前記切替流入路及び前記共有流出路はそれぞれ２本とし、前記切替流入路の２本のうちの１方は第１切替流入路部として前記第１流入路と連通可能とし、他方は第２切替流入路部として前記第２流入路と連通可能とし、前記共有流出路の２本のうちの１方は第１切替流出路部として前記第１流出路と連通し、他方は第２切替流出路部として前記第２流出路と連通してなることを特徴とするガス供給切替バルブ。   3. The gas supply switching valve according to claim 2, wherein each of the switching inflow passage and the common outflow passage of the valve body has two, and one of the two switching inflow passages is a first switching inflow passage portion. The first inflow path can be communicated with the other, and the other can be communicated with the second inflow path as a second switching inflow path, and one of the two shared outflow paths can be communicated with the first switching outflow path. A gas supply switching valve characterized in that it communicates with the first outflow passage and the other communicates with the second outflow passage as a second switching outflow passage portion. 請求項１，２，３又は４の何れか１項に記載のガス供給切替バルブにおいて、前記共有流出路と前記切替流入路との間に低圧調整弁が設けられる回路が具備されてなることを特徴とするガス供給切替バルブ。   5. The gas supply switching valve according to claim 1, further comprising a circuit in which a low pressure regulating valve is provided between the shared outflow passage and the switching inflow passage. Characteristic gas supply switching valve. 請求項１，２，３，４又は５の何れか１項に記載のガス供給切替バルブにおいて、前記バルブボディには流通するガスの種類を判別するセンサが具備されてなることを特徴とするガス供給切替バルブ。   The gas supply switching valve according to any one of claims 1, 2, 3, 4 and 5, wherein the valve body is provided with a sensor for determining the type of gas flowing therethrough. Supply switching valve. 都市ガス及びＬＰＧを使用可能な発電用ガスエンジンと、弁室と第１流入路と第２流入路と共有流出路と共有流入路と第１流出路と第２流出路とを備えたバルブボディと、切替流入路と切替流出路とを備え前記弁室に収納される弁体と、該弁体を前記バルブボディに対して切替操作する操作部とを備え、前記弁体の切替操作によって前記切替流入路及び前記切替流出路は、前記第１流入路と前記共有流出路と前記共有流入路と前記第１流出路を一連とする第１ガス供給流路、或いは前記第２流入路と前記共有流出路と前記共有流入路と前記第２流出路を一連とする第２ガス供給流路の何れか一方に切替を行う構成としてなるガス供給切替バルブと、前記発電用ガスエンジンに具備され異なるガスを流入させる第１ガス燃料入口及び第２ガス燃料入口が具備されたミキサと、都市ガス供給源と、ＬＰＧ供給源と、低圧調整弁とを備え、
前記都市ガス供給源と前記ガス供給切替バルブにおける前記第１流入路、及び前記ＬＰＧ供給源と前記第２流入路とがそれぞれ連通され、前記ガス供給切替バルブの前記共有流出路と前記切替流入路との間に前記低圧調整弁が配置され、該低圧調整弁は流通するガスを種類に応じて適正な圧力に設定され、前記ガス供給切替バルブの第１流出路は前記ミキサの第１ガス燃料入口に供給され、前記第２流出路は前記ミキサの第２ガス燃料入口に供給されてなることを特徴とする発電用ガスエンジンのガス供給システム。 A valve body having a power generation gas engine capable of using city gas and LPG, a valve chamber, a first inflow path, a second inflow path, a common outflow path, a common inflow path, a first outflow path, and a second outflow path A valve body that is provided with a switching inflow path and a switching outflow path and is housed in the valve chamber, and an operation unit that switches the valve body with respect to the valve body. The switching inflow path and the switching outflow path are the first gas supply flow path including the first inflow path, the shared outflow path, the shared inflow path, and the first outflow path, or the second inflow path and the A gas supply switching valve configured to switch to any one of a shared outflow path, a shared inflow path, and a second gas supply path that is a series of the second outflow paths, and the power generation gas engine are different. 1st gas fuel inlet and 2nd gas fuel which let gas flow in Comprising a mixer inlet is provided, a city gas supply source, a LPG supply source and a low-pressure regulating valve,
The city gas supply source and the first inflow passage in the gas supply switching valve, and the LPG supply source and the second inflow passage are communicated, respectively, and the shared outflow passage and the switching inflow passage of the gas supply switching valve The low-pressure regulating valve is arranged between the gas supply switching valve and the low-pressure regulating valve at a proper pressure according to the type, and the first outflow path of the gas supply switching valve is the first gas fuel of the mixer A gas supply system for a power generation gas engine, wherein the gas supply system is supplied to an inlet, and the second outflow path is supplied to a second gas fuel inlet of the mixer. 請求項７に記載の発電用ガスエンジンのガス供給システムにおいて、ＥＣＵが具備され、前記低圧調整弁は、前記ＥＣＵからの命令にてガス種に応じて適正圧力となるように作動してなることを特徴とする発電用ガスエンジンのガス供給システム。   8. A gas supply system for a power generation gas engine according to claim 7, wherein an ECU is provided, and the low-pressure adjusting valve is operated so as to have an appropriate pressure according to a gas type according to a command from the ECU. A gas supply system for a power generation gas engine. 請求項７又は８に記載の発電用ガスエンジンのガス供給システムにおいて、ＥＣＵが具備され、ガス供給切替バルブにはセンサが設けられると共に前記ＥＣＵと繋がり、前記ガス供給切替バルブを通過するガス種を前記センサと前記ＥＣＵにて判別し、その判別結果を前記ミキサに送り該ミキサのガス種に応じた入口を開いてなることを特徴とする発電用ガスエンジンのガス供給システム。   9. A gas supply system for a power generation gas engine according to claim 7 or 8, wherein an ECU is provided, a gas supply switching valve is provided with a sensor and connected to the ECU, and a gas type passing through the gas supply switching valve is selected. A gas supply system for a power generation gas engine, wherein the sensor and the ECU discriminate, and the discrimination result is sent to the mixer to open an inlet corresponding to the gas type of the mixer.
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