JP2004360893A - Pressure reducing valve for high-pressure gas tank - Google Patents

Pressure reducing valve for high-pressure gas tank Download PDF

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JP2004360893A
JP2004360893A JP2003393360A JP2003393360A JP2004360893A JP 2004360893 A JP2004360893 A JP 2004360893A JP 2003393360 A JP2003393360 A JP 2003393360A JP 2003393360 A JP2003393360 A JP 2003393360A JP 2004360893 A JP2004360893 A JP 2004360893A
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valve
chamber
pressure reducing
pressure
valve body
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JP4344225B2 (en
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Nobuyuki Kawamura
信之 川村
Yoshio Nuitani
芳雄 縫谷
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Honda Motor Co Ltd
Hamai Industries Ltd
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Honda Motor Co Ltd
Hamai Industries Ltd
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/04—Control of fluid pressure without auxiliary power
    • G05D16/10—Control of fluid pressure without auxiliary power the sensing element being a piston or plunger
    • G05D16/103—Control of fluid pressure without auxiliary power the sensing element being a piston or plunger the sensing element placed between the inlet and outlet
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/04—Control of fluid pressure without auxiliary power
    • G05D16/0402—Control of fluid pressure without auxiliary power with two or more controllers mounted in series

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  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Control Of Fluid Pressure (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact two-stage pressure reducing valve durable for long-time use. <P>SOLUTION: A first valve chamber 241 integrally formed with a lid body 2 of the high-pressure gas tank, a first valve element 5, a spring 6, a second valve chamber 32, a second valve element 7, a spring 8 and a main body B are respectively formed into a rotating body shape, and axes thereof are respectively arranged on the same axis, and flow passages 56, 35 and 76 wherein gas flows are arranged on the axis. Each of parts is formed into a rotating body shape, and swinging direction of the valve elements 5 and 7 are formed in the same direction to restrict a load to be generated by vibration, and miniaturization is thereby realized. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

この発明は、高圧ガス容器からガスを取り出す際に用いられる高圧ガス容器用減圧弁に関するものである。   The present invention relates to a pressure reducing valve for a high-pressure gas container used when extracting gas from a high-pressure gas container.

従来、例えば、燃料電池システムに用いる水素ガスなど、ガスの貯蔵をする場合、高圧に圧縮されたガスを収納した高圧ガス容器が用いられる。そして、この高圧ガス容器からガスを取り出す場合には、減圧弁を介して、所望の圧力に減圧し、充填されているガスを取り出している。   2. Description of the Related Art Conventionally, when storing a gas such as a hydrogen gas used in a fuel cell system, a high-pressure gas container containing a gas compressed to a high pressure is used. When removing gas from the high-pressure gas container, the pressure is reduced to a desired pressure via a pressure reducing valve, and the filled gas is removed.

ここで、容器内のガスは、ガス搭載量を増やすために極めて高い圧力（例えば、７０ＭＰａ程度）に充填されており、１回の減圧では、所望の２次圧値まで、高精度に減圧することができない。このため、２度減圧を行い、２段目の減圧機構によって、２次圧値へ、高い精度でガス圧値を設定することができる。
このように、２度減圧を行う機構としては、例えば以下に挙げる文献がある。
特開２０００−２５７７９７号。 Here, the gas in the container is filled to an extremely high pressure (for example, about 70 MPa) in order to increase the gas loading amount, and the pressure is reduced to a desired secondary pressure value with high accuracy by one pressure reduction. I can't. For this reason, the pressure is reduced twice, and the gas pressure value can be set to the secondary pressure value with high accuracy by the second-stage pressure reducing mechanism.
As described above, as a mechanism for reducing pressure twice, for example, there are the following documents.
JP-A-2000-257797.

しかし、上記従来の減圧機構は、高圧ガス容器から減圧機構までガスを供給する供給路を設ける必要がある。ガスが燃料ガスである場合、このような高圧ガスの経路は、事故などの外部衝撃により破損した場合を想定すると、短い程安全性が高い。特許文献１は、容器弁内に２つの減圧弁を一体化した機構が記載されている。このように、２段減圧機構を一体化し、これを高圧ガスの減圧に用いる場合には、次のような問題がある。   However, the conventional pressure reducing mechanism needs to provide a supply path for supplying gas from the high-pressure gas container to the pressure reducing mechanism. If the gas is a fuel gas, the shorter the path of such a high-pressure gas is, the higher the safety is, assuming that the path is broken by an external impact such as an accident. Patent Document 1 describes a mechanism in which two pressure reducing valves are integrated in a container valve. As described above, when the two-stage pressure reducing mechanism is integrated and used for reducing the pressure of the high-pressure gas, the following problem occurs.

高圧ガスを減圧するため、弁体の振動数が高くなり、振動により各部品に加わる負荷が大きくなる。また、２段減圧であるために、弁体が２つとなり、この２つの振動源から発生する振動によって、減圧機構全体に加わる付加が増大する。このため、構成部品の破損などが生じやすく、故障が発生する頻度が高くなっていた。
この発明は、高圧ガス用の減圧弁であって、より長期間使用可能な２段減圧弁を提供することを目的としている。 Since the pressure of the high-pressure gas is reduced, the frequency of the valve body increases, and the load applied to each component due to the vibration increases. Further, since the pressure is reduced in two stages, the number of valve elements becomes two, and the vibration generated from the two vibration sources increases the load applied to the entire pressure reducing mechanism. For this reason, the component parts are likely to be damaged, and the frequency of failures has been increased.
An object of the present invention is to provide a two-stage pressure reducing valve for a high-pressure gas, which can be used for a longer period of time.

以上のような目的は、以下の本発明によって達成される。
（１） 高圧ガス容器の蓋体に装着される減圧弁であって、
前記蓋体に形成された第１弁室と、
前記第１弁室に形成された第１弁座と、
前記第１弁座の開口部と容器内とを連通する第１流路と、
前記第１弁室内において気密を維持しつつ、第１弁座を塞いだ閉塞位置と、第１弁座から離れた開放位置との間で往復動し得る第１弁体と、
第１弁体を開放位置の方向へ付勢する第１付勢部材と、
第１弁室と連通し、第１弁室の下流側に位置する第１減圧室と、
第１減圧室の第２弁室とを連通する第２流路と、
第２弁室に形成され、第２流路の開口部を有する第２弁座と、
前記第２弁室内において気密を維持しつつ、第２弁座を塞いだ閉塞位置と、第２弁座から離れた開放位置との間で往復動し得る第２弁体と、
第２弁体を開放位置の方向へ付勢する第２付勢部材と、
第２弁室と連通し、第２弁室の下流側に位置する第２減圧室と、
第１弁体、第１付勢部材、第２弁体、第２付勢部材を収納する本体とを備え、
第１弁体と第２弁体は、同一軸線上で往復動する高圧ガス容器用減圧弁。 The above objects are achieved by the present invention described below.
(1) A pressure reducing valve attached to a lid of a high-pressure gas container,
A first valve chamber formed in the lid;
A first valve seat formed in the first valve chamber;
A first flow path that communicates the opening of the first valve seat with the inside of the container;
A first valve body that can reciprocate between a closed position that blocks the first valve seat and an open position that is separated from the first valve seat while maintaining airtightness in the first valve chamber;
A first urging member for urging the first valve body in the direction of the open position;
A first decompression chamber, which communicates with the first valve chamber and is located downstream of the first valve chamber;
A second flow path communicating with the second valve chamber of the first decompression chamber;
A second valve seat formed in the second valve chamber and having an opening of the second flow path;
A second valve body that can reciprocate between a closed position that closes the second valve seat and an open position that is separated from the second valve seat while maintaining airtightness in the second valve chamber;
A second biasing member for biasing the second valve body toward the open position;
A second decompression chamber that communicates with the second valve chamber and is located downstream of the second valve chamber;
A first valve element, a first urging member, a second valve element, and a main body that houses the second urging member;
The first valve body and the second valve body are pressure reducing valves for a high-pressure gas container that reciprocate on the same axis.

（２） 第１弁体、第２弁体及び本体は、回転体形状に形成され、それぞれの中心軸は、同一軸線上に位置している上記（１）に記載の高圧ガス容器用減圧弁。   (2) The pressure reducing valve for a high-pressure gas container according to the above (1), wherein the first valve body, the second valve body, and the main body are formed in a rotary body shape, and their respective central axes are located on the same axis. .

（３） 第１弁体は、第１弁室と第１減圧室とを連通する流通路を、第２弁体内は、第２弁室と第２減圧室とを連通する流通路を、それぞれ有している上記（１）又は（２）に記載の高圧ガス容器用減圧弁。   (3) The first valve body has a flow passage communicating the first valve chamber and the first decompression chamber, and the second valve body has a flow passage communicating the second valve chamber and the second decompression chamber. The pressure reducing valve for a high-pressure gas container according to (1) or (2) above.

（４） 蓋体、第１弁体、第２弁体及び本体の固有振動数は、それぞれ異なっている上記（１）〜（３）のいずれか１に記載の高圧ガス容器用減圧弁。   (4) The pressure reducing valve for a high-pressure gas container according to any one of (1) to (3), wherein the lid, the first valve, the second valve, and the main body have different natural frequencies.

（５） 前記第２減圧室に連通する排出口を有し、該排出口は、第１弁体と第２弁体が配置されている軸線上に位置し、排出口に接続される配管の軸線が、前記軸線に平行となっている上記（１）〜（４）のいずれか１に記載の高圧ガス容器用減圧弁。   (5) a discharge port communicating with the second decompression chamber, wherein the discharge port is located on an axis where the first valve body and the second valve body are arranged, and is connected to a pipe connected to the discharge port; The pressure reducing valve for a high-pressure gas container according to any one of the above (1) to (4), wherein an axis is parallel to the axis.

請求項１に記載の本発明によれば、２つの弁体は、同一軸線上で振動するので、振動源を２つとすることによる、機構全体に加わる負荷の増加を抑制することができる。特に、高圧ガスを減圧する場合には、発生する振動による衝撃は、過大となるが、このような弁体の振動に対して、機構全体に加わる負荷の増加を十分に抑制することができる。また、高圧ガス容器の蓋体を構成要素としているため、設置スペースを一層少なくすることができる。   According to the first aspect of the present invention, since the two valve bodies vibrate on the same axis, an increase in load applied to the entire mechanism due to the use of two vibration sources can be suppressed. In particular, when the high-pressure gas is depressurized, the shock due to the generated vibration becomes excessive. However, it is possible to sufficiently suppress the increase in the load applied to the entire mechanism with respect to the vibration of the valve body. Further, since the lid of the high-pressure gas container is a constituent element, the installation space can be further reduced.

請求項２に記載の本発明によれば、各部材は、回転体形状に形成され、かつ、振動の方向は、その回転体の軸方向であるため、振動は回転体の中心から外方向に均一に伝わり、部分的に生じる応力集中を緩和することができる。
請求項３に記載の本発明によれば、流通路を弁体内に設けることによって、減圧弁の小型化を図ることができる。 According to the invention described in claim 2, each member is formed in the shape of a rotating body, and the direction of vibration is the axial direction of the rotating body, so that the vibration is directed outward from the center of the rotating body. The stress is transmitted uniformly, and the partial concentration of stress can be reduced.
According to the third aspect of the present invention, by providing the flow passage in the valve body, the size of the pressure reducing valve can be reduced.

請求項４に記載の発明によれば、各部材の固有振動数を異なるものとしているので、共振が抑制され、各部材の共振による破損を防止できる。
請求項５に記載の発明によれば、排出口が第１弁体及び第２弁体の軸線上に位置し、この排出口に接続される配管の軸線が、第１弁体と第２弁体の軸線に合致するので、配管に伝わる振動の方向が軸方向となり、振動による配管の撓みの発生を抑制することができる。 According to the fourth aspect of the present invention, since the natural frequencies of the respective members are different, resonance is suppressed, and breakage of each member due to resonance can be prevented.
According to the invention as set forth in claim 5, the outlet is located on the axis of the first valve body and the second valve body, and the axis of the pipe connected to the outlet is the first valve body and the second valve. Since it matches the axis of the body, the direction of vibration transmitted to the pipe becomes the axial direction, and it is possible to suppress the occurrence of bending of the pipe due to the vibration.

以下、本発明の好適実施形態の減圧弁について、添付図面に基づいて詳細に説明する。図１は、本発明の減圧弁１の断面側面図である。減圧弁１は、高圧ガス容器に装填され、この高圧ガス容器の蓋体２と、本体Ｂと、本体Ｂ内に収納された第１弁体５と、スプリング６と、第２弁体７と、スプリング８とを備えている。蓋体２は、高圧ガス容器に螺合させられるためのネジ部２１を外側面に有し、さらに、一端は高圧ガス容器内に開口し、他端は高圧ガス容器の外側に開口する排出通路２２を有している。排出通路２２の両端開口部には、インタンク装置等を接続するための雌ネジ部２３１、閉止弁を螺入するための雌ネジ部２３２が形成されている。   Hereinafter, a pressure reducing valve according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a sectional side view of a pressure reducing valve 1 of the present invention. The pressure reducing valve 1 is loaded in a high-pressure gas container, and a lid 2 of the high-pressure gas container, a main body B, a first valve body 5 housed in the main body B, a spring 6, a second valve body 7, , A spring 8. The lid 2 has a screw portion 21 on the outer surface for screwing to the high-pressure gas container. Further, one end opens to the high-pressure gas container and the other end opens to the outside of the high-pressure gas container. 22. A female screw portion 231 for connecting an in-tank device or the like and a female screw portion 232 for screwing a shutoff valve are formed at both end openings of the discharge passage 22.

蓋体２の側面には、減圧弁の本体３が接続される接続部２４が突出し、周面には本体Ｂを接続するための雄ネジ部２４３が形成されている。接続部２４の中心には第１弁室２４１が、第１弁室２４１の周囲にはスプリングを収納するためのスプリング収納部２４２が、第１弁室２４１と同心円上に形成されている。第１弁室２４１の底部には、第１弁座２４４が形成されており、第１弁座２４４の中心に第１流路２５の一端が開口する開口部２５１が形成されている。第１流路２５の他端は、排出通路２２内に開口し、高圧ガス容器内の高圧ガス（１次圧ガス）は、第１流路２５を通って、第１弁室２４１へ流入する構成となっている。   A connecting portion 24 to which the main body 3 of the pressure reducing valve is connected protrudes from a side surface of the lid 2, and a male screw portion 243 for connecting the main body B is formed on a peripheral surface. A first valve chamber 241 is formed at the center of the connection part 24, and a spring storage part 242 for storing a spring is formed concentrically with the first valve chamber 241 around the first valve chamber 241. A first valve seat 244 is formed at the bottom of the first valve chamber 241, and an opening 251 at one end of the first flow path 25 is formed at the center of the first valve seat 244. The other end of the first flow path 25 opens into the discharge passage 22, and the high-pressure gas (primary pressure gas) in the high-pressure gas container flows into the first valve chamber 241 through the first flow path 25. It has a configuration.

本体Ｂは、蓋体２に接続され、第１弁体５を収納する第１部材３と、第１部材３に接続され、第２弁体７を収納する第２部材４とを備えている。第１部材３は、回転体形状である筒状に形成され、先端の内周面には雌ネジ部３１が形成されている。第１部材３の後端中央には、第２弁室３２が形成され、第２弁室３２の周囲にはスプリングを収納するためのスプリング収納部３３が、第２弁室３２と同心円上に形成されている。第１部材３の後端部外周面には、第２部材４を螺合させるための雄ネジ部３７が形成されている。   The main body B includes a first member 3 connected to the lid 2 and housing the first valve body 5, and a second member 4 connected to the first member 3 and housing the second valve body 7. . The first member 3 is formed in a cylindrical shape having a rotating body shape, and a female screw portion 31 is formed on an inner peripheral surface at a distal end. A second valve chamber 32 is formed in the center of the rear end of the first member 3, and a spring storage portion 33 for storing a spring around the second valve chamber 32 is formed concentrically with the second valve chamber 32. Is formed. A male screw portion 37 for screwing the second member 4 is formed on the outer peripheral surface of the rear end of the first member 3.

第２弁室３２の底部には、第２弁座３４が形成されており、第２弁座３４の中心には開口部３５１が形成されている。第２弁室３２の反対側には、第１弁体５の後端部を収納する弁体収納部３６が形成されており、弁体収納部３６と第２弁室３２との間には第２流路３５が形成されている。第２流路３５の第２弁室３２側の開口は、開口部３５１となっている。   A second valve seat 34 is formed at the bottom of the second valve chamber 32, and an opening 351 is formed at the center of the second valve seat 34. On the opposite side of the second valve chamber 32, a valve body storage part 36 for storing the rear end of the first valve body 5 is formed, and between the valve body storage part 36 and the second valve chamber 32. The second flow path 35 is formed. The opening of the second flow passage 35 on the second valve chamber 32 side is an opening 351.

接続部２４１と第１部材３とによって形成された内部空間には、第１弁体５と、第１付勢部材である第１スプリング６が収納されている。第１弁体５は、回転体形状に形成され、先端部５１は、第１弁室２４１内に挿入され、後端部５２は弁体収納部３６に収納されている。そして、第１弁室２４１の内壁と、第１弁体５の外周面との間には、Ｏリング５３が介挿され、第１弁室２４１の気密状態を維持しつつ、第１弁体５が軸方向へ往復動可能に構成されている。第１弁体５の後端面５２１と弁体収納部３６とによって、第１減圧室が構成される。また、弁体収納部３６内壁と、第１弁体５の外周面との間には、Ｏリング５４が介挿され、第１減圧室を気密に維持しつつ、第１弁体５が軸方向へ往復動可能に構成されている。第１弁体５の外周面にはフランジ５５が形成され、このフランジ５５とスプリング収納部２４２との間に圧縮されたスプリング６が介挿されている。   A first valve body 5 and a first spring 6 as a first urging member are housed in an internal space formed by the connecting portion 241 and the first member 3. The first valve body 5 is formed in a rotating body shape, the front end 51 is inserted into the first valve chamber 241, and the rear end 52 is housed in the valve housing 36. An O-ring 53 is interposed between the inner wall of the first valve chamber 241 and the outer peripheral surface of the first valve body 5, and the first valve body 241 is kept airtight while the first valve body 241 is kept airtight. 5 is configured to be able to reciprocate in the axial direction. A first decompression chamber is constituted by the rear end face 521 of the first valve element 5 and the valve element storage section 36. Further, an O-ring 54 is interposed between the inner wall of the valve element housing 36 and the outer peripheral surface of the first valve element 5, and the first valve element 5 is pivoted while maintaining the first decompression chamber airtight. It is configured to be able to reciprocate in the direction. A flange 55 is formed on the outer peripheral surface of the first valve body 5, and the compressed spring 6 is interposed between the flange 55 and the spring housing portion 242.

第１弁体５は、先端面５１１が第１弁座２４４に押接されてガスの流出を止める閉鎖位置と、先端面５１１が第１弁座２４４から離れた開放位置との間で、往復動可能に構成されている。スプリング６は、開放位置へ向けて第１弁体を付勢している。スプリング６が収容されている空間は、第１弁体５の移動によって容積が変更するため、空間内の圧力を一定にし、第１弁体５の動きを妨げないよう、通気孔３７が第１部材３の側面に形成されている。
第１弁体５の中心には、軸線Ｏに沿って流通路５６が形成され、流通路５６の先端は、先端部５１の側面に開口し、後端は、後端面５２１の中央に開口する。第１弁室２４１は、この流通路５６を介して第１減圧室と連通する。 The first valve body 5 reciprocates between a closed position in which the distal end surface 511 is pressed against the first valve seat 244 to stop the outflow of gas and an open position in which the distal end surface 511 is separated from the first valve seat 244. It is configured to be movable. The spring 6 urges the first valve body toward the open position. Since the volume in which the spring 6 is accommodated changes due to the movement of the first valve body 5, the ventilation hole 37 is provided with the first vent hole 37 so that the pressure in the space is kept constant and the movement of the first valve body 5 is not hindered. It is formed on the side surface of the member 3.
A flow passage 56 is formed at the center of the first valve body 5 along the axis O. The front end of the flow passage 56 opens at the side surface of the front end portion 51, and the rear end opens at the center of the rear end surface 521. . The first valve chamber 241 communicates with the first decompression chamber via the flow passage 56.

第２部材４は、回転体形状である筒状に形成され、先端の内周面には雌ネジ部４１が形成されている。第２部材４の後端中央には、排出口４２が形成され、その内側には弁体収納部４３が形成されている。排出口４２の内周には、雌ネジ部４２１が形成され、雌ネジ部４２１の軸線は、第１弁体５及び第２弁体７に共通する軸線Ｏと同一となっている。このような構成とすることで、雌ネジ部４２１に螺合させられる配管9は、その軸線が第１弁体５及び第２弁体７に共通する軸線Ｏと同一となる。これにより、第１弁体５及び第２弁体７の作動によって生じる振動は、配管に対して軸方向に往復動する振動となる。配管が、その軸に対して直角方向に復動する振動が与えられると、振動により撓みの発生が顕著となり、接続部の緩みや離脱の原因となるが、軸方向への振動では、このような不都合の発生は抑制される。   The second member 4 is formed in a cylindrical shape having a rotating body shape, and a female screw portion 41 is formed on an inner peripheral surface at a distal end. A discharge port 42 is formed in the center of the rear end of the second member 4, and a valve element housing 43 is formed inside the discharge port 42. A female screw portion 421 is formed on the inner periphery of the outlet 42, and the axis of the female screw portion 421 is the same as the axis O common to the first valve body 5 and the second valve body 7. With such a configuration, the pipe 9 screwed to the female screw portion 421 has the same axis as the axis O common to the first valve body 5 and the second valve body 7. Thereby, the vibration generated by the operation of the first valve body 5 and the second valve body 7 becomes the vibration reciprocating in the axial direction with respect to the pipe. If the pipe is subjected to a vibration that returns in the direction perpendicular to its axis, the vibration will cause significant bending and cause loosening or detachment of the connection part. The occurrence of any inconvenience is suppressed.

第１部材３と第２部材４とによって形成された内部空間には、第２弁体７と、第２付勢部材である第２スプリング８が収納されている。第２弁体７は、回転体形状に形成され、先端部７１は、第２弁室３２内に挿入され、後端部７２は弁体収納部４３に収納されている。そして、第２弁室３２の内壁と、第２弁体７の外周面との間には、Ｏリング７３が介挿され、第２弁室３２の気密状態を維持しつつ、第２弁体７が軸方向へ往復動可能に構成されている。第２弁体７の後端面７２１と弁体収納部４３とによって、第２減圧室が構成される。第２弁体７の後端外周面にはフランジ７５が形成され、このフランジ７５とスプリング収納部３３との間に圧縮されたスプリング８が介挿されている。また、弁体収納部４３内壁と、フランジ７５周端面との間には、Ｏリング７４が介挿され、第２減圧室を気密に維持しつつ、第２弁体７が軸方向へ往復動可能に構成されている。   A second valve body 7 and a second spring 8 as a second urging member are housed in an internal space formed by the first member 3 and the second member 4. The second valve body 7 is formed in the shape of a rotating body, the front end 71 is inserted into the second valve chamber 32, and the rear end 72 is housed in the valve housing 43. An O-ring 73 is interposed between the inner wall of the second valve chamber 32 and the outer peripheral surface of the second valve body 7 to maintain the airtight state of the second valve chamber 32 while keeping the second valve body 32 airtight. 7 is configured to be able to reciprocate in the axial direction. The rear end face 721 of the second valve element 7 and the valve element housing 43 constitute a second decompression chamber. A flange 75 is formed on the outer peripheral surface of the rear end of the second valve body 7, and the compressed spring 8 is interposed between the flange 75 and the spring housing 33. Also, an O-ring 74 is interposed between the inner wall of the valve element housing 43 and the peripheral end face of the flange 75, and the second valve element 7 reciprocates in the axial direction while maintaining the second decompression chamber airtight. It is configured to be possible.

第２弁体７は、先端面７１１が第２弁座３４に押接されてガスの流出を止める閉鎖位置と、先端面７１１が第２弁座３４から離れた開放位置との間で、往復動可能に構成されている。スプリング８は、開放位置へ向けて第２弁体７を付勢している。スプリング８が収容されている空間は、第２弁体７の移動によって容積が変更するため、空間内の圧力を一定にし、第２弁体７の動きを妨げないよう、通気孔４４が第２部材４の側面に形成されている。
第２弁体７の中心には、軸線Ｏに沿って流通路７６が形成され、流通路７６の先端は、先端部７１の側面に開口し、後端は、後端面７２１の中央に開口する。第２弁室３２は、この流通路７６を介して第２減圧室と連通する。 The second valve body 7 reciprocates between a closed position in which the distal end surface 711 is pressed against the second valve seat 34 to stop the outflow of gas and an open position in which the distal end surface 711 is separated from the second valve seat 34. It is configured to be movable. The spring 8 urges the second valve body 7 toward the open position. Since the volume of the space in which the spring 8 is housed changes due to the movement of the second valve body 7, the ventilation hole 44 is provided with the second vent hole 44 so that the pressure in the space is kept constant and the movement of the second valve body 7 is not hindered. It is formed on the side surface of the member 4.
A flow passage 76 is formed at the center of the second valve body 7 along the axis O. The front end of the flow passage 76 opens at the side surface of the front end portion 71, and the rear end opens at the center of the rear end surface 721. . The second valve chamber 32 communicates with the second decompression chamber via the flow passage 76.

以上のように構成された本発明の減圧弁１は、スプリングの付勢力と、減圧室内のガス圧により弁体に加わる力との均衡により、閉鎖位置と開放位置との間で、弁体を高速で往復動（振動）させ、この第１弁体５の動きによって、高圧ガス容器内の圧力（１次圧）を、第１減圧室で２次圧まで減圧し、さらに、第２弁体７の同様の動きによって、第２減圧室において３次圧へ減圧する。このような本発明の高圧ガス容器用減圧弁は、例えば、高圧ガス容器内のガス圧が、３０ＭＰａ〜８０ＭＰａの範囲のように、高い圧力値であっても、より高い精度で、３次圧の圧力値（最終的にガスを使用する際の圧力値）に設定させることができる。
また、第１弁室２４１と第１減圧室とを連通する流通路５６は、第１弁体５内に形成され、また同様に、流通路７６も第２弁体７内に形成されているので、減圧弁１の全体の大きさを小型に構成することが可能となる。 The pressure reducing valve 1 of the present invention configured as described above allows the valve body to be moved between the closed position and the open position by balancing the urging force of the spring and the force applied to the valve body by the gas pressure in the pressure reducing chamber. It reciprocates (vibrates) at high speed, and by the movement of the first valve body 5, the pressure (primary pressure) in the high-pressure gas container is reduced to the secondary pressure in the first pressure reducing chamber. By the same movement of 7, the pressure is reduced to the tertiary pressure in the second decompression chamber. Such a pressure reducing valve for a high-pressure gas container of the present invention has a higher accuracy in the tertiary pressure even if the gas pressure in the high-pressure gas container is a high pressure value such as a range of 30 MPa to 80 MPa. (A pressure value when gas is finally used).
In addition, a flow passage 56 that connects the first valve chamber 241 and the first decompression chamber is formed in the first valve body 5, and similarly, a flow passage 76 is also formed in the second valve body 7. Therefore, the entire size of the pressure reducing valve 1 can be reduced.

ここで、第１弁体５と第２弁体７は、同一軸線Ｏ上に配置されているので、振動の向きも同じとなる。従って、弁体を含めた減圧弁機構全体に加わる振動は、同じ向きとなる。また、各部材は、回転体形状であり、これらを軸方向に直列して組み合わせた構成であり、さらに振動方向は軸方向に沿っているので、各部材に加わる、振動による応力は均一に分散される易くなり、部分的な応力集中が緩和される構成となっている。換言すると、弁体５、７及び本体Ｂは、回転体形状であり、荷重に対する強度が最も高い軸方向に振動荷重が加わることとなるので、横方向から荷重が加わる場合に比較して、振動荷重に対する耐久性がより向上する。また、振動源（弁体）は２つとなるが、振動方向は合致しているので、異なる方向から同時に２つの振動が加わる場合に比較して荷重に対する耐久性を十分に得られる。   Here, since the first valve element 5 and the second valve element 7 are arranged on the same axis O, the directions of vibration are the same. Therefore, the vibration applied to the entire pressure reducing valve mechanism including the valve element has the same direction. In addition, each member has a rotating body shape, and a configuration in which these are combined in series in the axial direction. Further, since the vibration direction is along the axial direction, stress due to vibration applied to each member is evenly distributed. And the partial stress concentration is reduced. In other words, the valve elements 5, 7 and the main body B have a rotating body shape, and a vibration load is applied in the axial direction where the strength against the load is highest. The durability against load is further improved. In addition, although there are two vibration sources (valve elements), the vibration directions match, so that the durability against the load can be sufficiently obtained as compared with a case where two vibrations are simultaneously applied from different directions.

また、第１流路２５、第１弁室２４１、第１弁体５の流通路５６、第２弁体７の流通路７６、排出口４２は、何れも第１弁体５、第２弁体７の軸線と、同一軸線Ｏ上に位置しており、かつ、各部品は、回転体形状であって、各部品の軸線は、同一軸線Ｏ上に位置する。このように、同一軸線Ｏ上に各構成部品を配置し、さらにガスの流通路もこの軸線Ｏに合致させることによって、振動に対する耐久性を向上させつつ、小型化を実現している。   The first flow path 25, the first valve chamber 241, the flow path 56 of the first valve element 5, the flow path 76 of the second valve element 7, and the outlet 42 are all the first valve element 5, the second valve The axis of the body 7 is located on the same axis O, and each part has a rotating body shape, and the axis of each part is located on the same axis O. As described above, by arranging the components on the same axis O, and by further matching the gas flow path with the axis O, miniaturization is achieved while improving durability against vibration.

特に、小型に形成された本体Ｂの外観は、回転体形状であって、その軸線Ｏ上に位置する両端部に、第１流路２５と排出口４２が設けられているため、配管経路の一部として、かつ配管に一体化して設けることができ、配置スペースを採らないといった利点がある。
また、２つの弁体、本体Ｂを構成する第１、第２部材３、４、蓋体２は、それぞれ固有振動数を異にしているので、共振による部材の破損も抑制することができる。 In particular, the external appearance of the main body B formed in a small size is a rotating body shape, and the first flow path 25 and the discharge port 42 are provided at both ends located on the axis O of the main body B. As a part, it can be provided integrally with the piping, and there is an advantage that no installation space is required.
Further, the first and second members 3, 4 and the lid 2, which constitute the two valve bodies, the main body B, have different natural frequencies, so that damage to the members due to resonance can be suppressed.

本発明の減圧弁の断面側面図である。It is a sectional side view of the pressure reducing valve of the present invention.

符号の説明Explanation of reference numerals

１ 減圧弁
２ 蓋体
２４ 接続部
２４１ 第１弁室
３２ 第２弁室
５ 第１弁体
６ 第１スプリング
７ 第２弁体
８ 第２スプリング DESCRIPTION OF REFERENCE NUMERALS 1 pressure reducing valve 2 lid 24 connecting portion 241 first valve chamber 32 second valve chamber 5 first valve 6 first spring 7 second valve 8 second spring

Claims (5)

高圧ガス容器の蓋体に装着される減圧弁であって、
前記蓋体に形成された第１弁室と、
前記第１弁室に形成された第１弁座と、
前記第１弁座の開口部と容器内とを連通する第１流路と、
前記第１弁室内において気密を維持しつつ、第１弁座を塞いだ閉塞位置と、第１弁座から離れた開放位置との間で往復動し得る第１弁体と、
第１弁体を開放位置の方向へ付勢する第１付勢部材と、
第１弁室と連通し、第１弁室の下流側に位置する第１減圧室と、
第１減圧室の第２弁室とを連通する第２流路と、
第２弁室に形成され、第２流路の開口部を有する第２弁座と、
前記第２弁室内において気密を維持しつつ、第２弁座を塞いだ閉塞位置と、第２弁座から離れた開放位置との間で往復動し得る第２弁体と、
第２弁体を開放位置の方向へ付勢する第２付勢部材と、
第２弁室と連通し、第２弁室の下流側に位置する第２減圧室と、
第１弁体、第１付勢部材、第２弁体、第２付勢部材を収納する本体とを備え、
第１弁体と第２弁体は、同一軸線上で往復動する高圧ガス容器用減圧弁。 A pressure reducing valve attached to the lid of the high-pressure gas container,
A first valve chamber formed in the lid;
A first valve seat formed in the first valve chamber;
A first flow path that communicates the opening of the first valve seat with the inside of the container;
A first valve body that can reciprocate between a closed position that blocks the first valve seat and an open position that is separated from the first valve seat while maintaining airtightness in the first valve chamber;
A first urging member for urging the first valve body in the direction of the open position;
A first decompression chamber, which communicates with the first valve chamber and is located downstream of the first valve chamber;
A second flow path communicating with the second valve chamber of the first decompression chamber;
A second valve seat formed in the second valve chamber and having an opening of the second flow path;
A second valve body that can reciprocate between a closed position that closes the second valve seat and an open position that is separated from the second valve seat while maintaining airtightness in the second valve chamber;
A second biasing member for biasing the second valve body toward the open position;
A second decompression chamber that communicates with the second valve chamber and is located downstream of the second valve chamber;
A first valve element, a first urging member, a second valve element, and a main body that houses the second urging member;
The first valve body and the second valve body are pressure reducing valves for a high-pressure gas container that reciprocate on the same axis. 第１弁体、第２弁体及び本体は、回転体形状に形成され、それぞれの中心軸は、同一軸線上に位置している請求項１に記載の高圧ガス容器用減圧弁。 2. The pressure reducing valve for a high-pressure gas container according to claim 1, wherein the first valve body, the second valve body, and the main body are formed in a shape of a rotating body, and respective central axes are located on the same axis. 第１弁体は、第１弁室と第１減圧室とを連通する流通路を、第２弁体内は、第２弁室と第２減圧室とを連通する流通路を、それぞれ有している請求項１又は２に記載の高圧ガス容器用減圧弁。 The first valve body has a flow passage communicating the first valve chamber and the first pressure reducing chamber, and the second valve body has a flow passage communicating the second valve chamber and the second pressure reducing chamber. The pressure reducing valve for a high-pressure gas container according to claim 1. 蓋体、第１弁体、第２弁体及び本体の固有振動数は、それぞれ異なっている請求項１〜３のいずれか１に記載の高圧ガス容器用減圧弁。 The pressure reducing valve for a high-pressure gas container according to any one of claims 1 to 3, wherein the lid, the first valve, the second valve, and the main body have different natural frequencies. 前記第２減圧室に連通する排出口を有し、該排出口は、第１弁体と第２弁体が配置されている軸線上に位置し、排出口に接続される配管の軸線が、前記軸線に平行となっている請求項１〜４のいずれか１に記載の高圧ガス容器用減圧弁。 It has a discharge port communicating with the second decompression chamber, and the discharge port is located on an axis where the first valve body and the second valve body are arranged, and an axis of a pipe connected to the discharge port is The pressure reducing valve for a high-pressure gas container according to any one of claims 1 to 4, wherein the pressure reducing valve is parallel to the axis.
JP2003393360A 2003-05-15 2003-11-25 Pressure reducing valve for high pressure gas container Expired - Fee Related JP4344225B2 (en)

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JP2014106666A (en) * 2012-11-27 2014-06-09 Denso Corp Pressure valve for high-pressure fluid and pressure valve for compressed natural gas
JP2015140814A (en) * 2014-01-27 2015-08-03 川崎重工業株式会社 Pressure reduction valve
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CN110226063A (en) * 2016-04-12 2019-09-10 移动Iv系统公司 Pressure-regulating device, the system including pressure-regulating device and correlation technique
CN110226063B (en) * 2016-04-12 2021-06-25 移动Iv系统公司 Pressure regulating device, system including a pressure regulating device, and related methods
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