JP2008065727A - Pressure reducing valve - Google Patents
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- JP2008065727A JP2008065727A JP2006245060A JP2006245060A JP2008065727A JP 2008065727 A JP2008065727 A JP 2008065727A JP 2006245060 A JP2006245060 A JP 2006245060A JP 2006245060 A JP2006245060 A JP 2006245060A JP 2008065727 A JP2008065727 A JP 2008065727A
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- 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
- G05D16/106—Sleeve-like sensing elements; Sensing elements surrounded by the flow path
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Abstract
Description
本発明は、ガスの消費等により一次側圧力が変化しても、二次側圧力を略一定圧に維持できる減圧弁に関する。 The present invention relates to a pressure reducing valve that can maintain a secondary pressure at a substantially constant pressure even when the primary pressure changes due to gas consumption or the like.
一般に減圧弁は、ハウジング内に形成された減圧弁室と、この減圧弁室に設けられた減圧弁座と、この減圧弁座に対し進退移動できる弁体と、上記の減圧弁座よりも下流側に形成された二次圧力室と、この二次圧力室の圧力を受けて進退移動するとともに上記の弁体と連動連結されたピストン部材と、弁体を減圧弁座から離隔させる方向へ付勢する付勢手段とを備え、ピストン部材が受ける二次圧力室の圧力と上記の付勢手段とのバランスにより弁体が減圧弁座に接離して減圧弁室を通過するガス圧力が減圧される。しかし、上記の弁体は減圧弁室に流入するガスの一次側圧力(以下、「一次圧」という。)の影響を受けるため、例えばガスの消費によりガス容器から供給される一次圧が変化すると、これに応じて二次側圧力(以下、「二次圧」という。)も変化する。 In general, a pressure reducing valve includes a pressure reducing valve chamber formed in a housing, a pressure reducing valve seat provided in the pressure reducing valve chamber, a valve body that can move forward and backward with respect to the pressure reducing valve seat, and a downstream side of the pressure reducing valve seat. A secondary pressure chamber formed on the side, a piston member that moves forward and backward in response to the pressure of the secondary pressure chamber, and is linked to the valve body, and is attached in a direction to separate the valve body from the pressure reducing valve seat. And the pressure of the secondary pressure chamber received by the piston member and the urging means balances the valve body with the pressure reducing valve seat to reduce the gas pressure passing through the pressure reducing valve chamber. The However, since the valve body is affected by the primary pressure of the gas flowing into the pressure reducing valve chamber (hereinafter referred to as “primary pressure”), for example, when the primary pressure supplied from the gas container changes due to gas consumption. Accordingly, the secondary pressure (hereinafter referred to as “secondary pressure”) also changes.
通常、ガス消費機器においては一定圧力のガスが供給されるように、上記の二次圧の変化を小さく抑えることが好ましい。しかし、例えば車載用燃料電池などに用いられる水素ガス容器は、コンパクトで大容量にするため高圧化が望まれており、貯蔵圧力が高圧になるとガスの消費による一次圧の変化量が大きくなって、この影響を受ける二次圧の変化も大きくなる。この二次圧の変化を抑えるためには、例えばピストンの外径を大きくして一次圧の影響を相対的に小さくしたり、2つの減圧弁を直列に接続して2段階に減圧したりする方法などが考えられる。しかし、ピストンの外径を大きくすると減圧弁を小形化することが容易でなく、また二段階に減圧する場合は2つの減圧弁が必要となり、コスト高となる。 Usually, it is preferable to suppress the change in the secondary pressure to be small so that a gas having a constant pressure is supplied to the gas consuming device. However, for example, hydrogen gas containers used for in-vehicle fuel cells are required to have a high pressure in order to be compact and have a large capacity, and when the storage pressure becomes high, the amount of change in the primary pressure due to gas consumption increases. The change in the secondary pressure affected by this also increases. In order to suppress this change in the secondary pressure, for example, the outer diameter of the piston is increased to relatively reduce the influence of the primary pressure, or the pressure is reduced in two stages by connecting two pressure reducing valves in series. Possible methods. However, when the outer diameter of the piston is increased, it is not easy to reduce the size of the pressure reducing valve, and when pressure is reduced in two stages, two pressure reducing valves are required, resulting in an increase in cost.
従来、一次圧の影響を抑えて二次圧の変化を小さくするため、減圧弁室をピストン部材に形成したロッド挿入穴の内部に設け、このロッド挿入穴に挿入されたロッドが、ロッド挿入穴内面との保密摺動部で受ける一次圧による付勢力と、上記の弁体が受ける一次圧による付勢力とを釣り合わせた減圧弁が提案されている(例えば、特許文献1参照。)。 Conventionally, in order to suppress the influence of the primary pressure and reduce the change in the secondary pressure, the pressure reducing valve chamber is provided inside the rod insertion hole formed in the piston member, and the rod inserted into the rod insertion hole is connected to the rod insertion hole. There has been proposed a pressure reducing valve that balances the urging force caused by the primary pressure received by the seal sliding portion with the inner surface and the urging force caused by the primary pressure received by the valve body (see, for example, Patent Document 1).
即ちこの減圧弁は、例えば図7に示すように、ハウジング(50)とピストン部材(53)と減圧ばね(54)とを備え、ハウジング(50)は有底円筒状のハウジング本体(51)と、このハウジング本体(51)の一端開口部を塞ぐ蓋部材(52)とを有する。このハウジング本体(51)には、内部にシリンダ室(56)が形成され、ハウジング本体(51)の底部にガス流入口(57)が形成してある。このハウジング本体(51)の底部内面から内方に、軸方向に細長い管状の第1ロッド(60)が突設してあり、この第1ロッド(60)内にはガス流入口(57)に連通する入口路(59)が形成してある。また蓋部材(52)にはガス流出口(58)が設けてある。この蓋部材(52)の内面から内方に、軸方向に細長い管状で上記の第1ロッド(60)よりも大径の第2ロッド(62)が、第1ロッド(60)と同軸上で向き合うように突設してある。この第2ロッド(62)内にはガス流出口(58)に連通する出口路(61)が形成してあり、この第2ロッド(62)の先端部に減圧弁座(63)が取り付けてある。 That is, this pressure reducing valve includes a housing (50), a piston member (53), and a pressure reducing spring (54), as shown in FIG. 7, for example. The housing (50) includes a bottomed cylindrical housing main body (51). And a lid member (52) that closes one end opening of the housing body (51). A cylinder chamber (56) is formed inside the housing body (51), and a gas inlet (57) is formed at the bottom of the housing body (51). A first rod (60) that is elongated in the axial direction protrudes inward from the inner surface of the bottom of the housing body (51). A gas inlet (57) is provided in the first rod (60). A communicating inlet channel (59) is formed. The lid member (52) is provided with a gas outlet (58). A second rod (62) that is elongated in the axial direction inward from the inner surface of the lid member (52) and has a larger diameter than the first rod (60) is coaxial with the first rod (60). Projected to face each other. An outlet passage (61) communicating with the gas outlet (58) is formed in the second rod (62), and a pressure reducing valve seat (63) is attached to the tip of the second rod (62). is there.
上記のピストン部材(53)は、シリンダ室(56)の内面に摺動自在に内嵌された拡張径部分(53a)と、この拡張径部分(53a)の一側に形成された縮小径部分(53b)とを有しており、この拡張径部分(53a)の一側および縮小径部分(53b)の外周とハウジング(50)の内側との間に二次圧力室(65)が形成してある。上記のピストン部材(53)の中心には、小径穴(64a)と大径穴(64b)とが軸心方向に段付き状に貫通形成してある。この小径穴(64a)は上記の第1ロッド(60)に、大径穴(64b)を上記の第2ロッド(62)にそれぞれシール部材(66・67)を介して保密摺動自在に外嵌してある。この小径穴(64a)と大径穴(64b)の境界の段部には、ピストン部材(53)の往復動に伴い減圧弁座(63)に対し接近・離反する弁体(68)が設けてある。小径穴(64a)内に挿入された第1ロッド(60)の先端部とこれに対面する上記の減圧弁座(63)との間に減圧弁室(69)が形成されている。また、上記の減圧ばね(54)は蓋部材(52)とピストン部材(53)との間に配置され、この減圧ばね(54)によってピストン部材(53)に開弁方向(X1)のばね力が付与してある。 The piston member (53) includes an expanded diameter portion (53a) slidably fitted on the inner surface of the cylinder chamber (56), and a reduced diameter portion formed on one side of the expanded diameter portion (53a). (53b), and a secondary pressure chamber (65) is formed between one side of the expanded diameter portion (53a) and the outer periphery of the reduced diameter portion (53b) and the inside of the housing (50). It is. In the center of the piston member (53), a small diameter hole (64a) and a large diameter hole (64b) are formed in a stepped manner in the axial direction. The small-diameter hole (64a) is attached to the first rod (60), and the large-diameter hole (64b) is attached to the second rod (62) via a seal member (66/67) so as to be slidable. It is fitted. A valve element (68) that approaches and separates from the pressure reducing valve seat (63) as the piston member (53) reciprocates is provided at the step portion at the boundary between the small diameter hole (64a) and the large diameter hole (64b). It is. A pressure reducing valve chamber (69) is formed between the tip of the first rod (60) inserted into the small diameter hole (64a) and the pressure reducing valve seat (63) facing the first rod (60). Further, the pressure reducing spring (54) is disposed between the lid member (52) and the piston member (53), and the pressure force in the valve opening direction (X1) is exerted on the piston member (53) by the pressure reducing spring (54). Is given.
このように構成された減圧弁によれば、ガス流入口(57)から流入するガスは、第1ロッド(60)内の入口路(59)を経て減圧弁室(69)に流入し、減圧弁座(63)と弁体(68)との間に形成されるオリフィスを通過することによって減圧されたのち、大径穴(64b)と第2ロッド(62)内の出口路(61)とを順に経てガス流出口(58)から取り出される。このとき、ピストン部材(53)は、二次圧力室(65)から受ける二次圧と減圧ばね(54)の弾圧力とのバランスで、弁体(68)を減圧弁座(63)に対し接近・離反する方向に移動させ、これにより二次圧が所定圧力に減圧される。 According to the pressure reducing valve configured as described above, the gas flowing in from the gas inlet (57) flows into the pressure reducing valve chamber (69) via the inlet passage (59) in the first rod (60), and the pressure is reduced. After the pressure is reduced by passing through an orifice formed between the valve seat (63) and the valve body (68), the large diameter hole (64b) and the outlet passage (61) in the second rod (62) Are sequentially taken out from the gas outlet (58). At this time, the piston member (53) moves the valve element (68) against the pressure reducing valve seat (63) by a balance between the secondary pressure received from the secondary pressure chamber (65) and the elastic pressure of the pressure reducing spring (54). The secondary pressure is reduced to a predetermined pressure by moving in the approaching / separating direction.
上記の第1ロッド(60)と小径穴(64a)との間を摺動自在にシールするシール部材(66)のシール径は、減圧弁座(63)に当接した弁体(68)と略同じシール径にしてある。このため、減圧弁室(69)内においてピストン部材(53)に働く一次圧は、開弁方向(X1)への力と閉弁方向(X2)への力とが釣り合うこととなり、ピストン部材(53)の減圧作動に一次圧の影響を受け難くすることができ、一次圧の変化に起因する二次圧の変化量を低減することができるようにしてある。 The seal diameter of the seal member (66) that slidably seals between the first rod (60) and the small diameter hole (64a) is the same as that of the valve body (68) in contact with the pressure reducing valve seat (63). The seal diameter is approximately the same. For this reason, the primary pressure acting on the piston member (53) in the pressure reducing valve chamber (69) balances the force in the valve opening direction (X1) and the force in the valve closing direction (X2). 53) can be made less susceptible to the influence of the primary pressure, and the amount of change in the secondary pressure due to the change in the primary pressure can be reduced.
しかしながら、図7に示す上記従来の減圧弁では、シリンダ室(56)内において、ハウジング本体(51)と蓋部材(52)のそれぞれから第1ロッド(60)と第2ロッド(62)を互いに同軸上で向き合うべく突設し、この第1ロッド(60)と第2ロッド(62)との双方にピストン部材(53)を摺動自在に外嵌させてあるが、ハウジング本体(51)に蓋部材(52)を螺着固定する際に、上記の第1ロッド(60)と第2ロッド(62)とを正確に同軸上に配置することが容易でない。このため、ハウジング本体(51)、蓋部材(52)、およびピストン部材(53)の加工やこれらの組付作業に困難を来たし、加工コストの高騰を招く問題がある。
また、ピストン部材(53)はシリンダ室(56)の内面と拡張径部分(53a)との間、ハウジング本体(51)側の第1ロッド(60)の外周と小径穴(64a)との間、及び蓋部材(52)側の第2ロッド(62)の外周と大径穴(64b)との間の3箇所を、それぞれシール部材(70・66・67)により摺動自在にシールする必要があり、ピストン部材の摺動性と保密性を両立させて良好な減圧性能を得ることが容易でない。
However, in the conventional pressure reducing valve shown in FIG. 7, in the cylinder chamber (56), the first rod (60) and the second rod (62) are connected to each other from the housing body (51) and the lid member (52), respectively. A piston member (53) is slidably fitted on both the first rod (60) and the second rod (62) so as to face each other on the same axis. When the lid member (52) is screwed and fixed, it is not easy to accurately arrange the first rod (60) and the second rod (62) on the same axis. For this reason, the processing of the housing body (51), the lid member (52), and the piston member (53) and the assembling work thereof become difficult, and there is a problem that the processing cost is increased.
The piston member (53) is located between the inner surface of the cylinder chamber (56) and the expanded diameter portion (53a), and between the outer periphery of the first rod (60) on the housing body (51) side and the small diameter hole (64a). And 3 points between the outer circumference of the second rod (62) on the lid member (52) side and the large-diameter hole (64b) must be slidably sealed by the seal members (70, 66, 67), respectively. Therefore, it is not easy to achieve good decompression performance by making the slidability and the tightness of the piston member compatible.
さらに、上記の第2ロッド(62)の先端部に付設させた減圧弁座(63)は、この第2ロッド(62)と同軸上で向き合う第1ロッド(60)に形成された入口路(59)の端部開口と対面しているため、この減圧弁座(63)が入口路(59)から減圧弁室(69)に流入するガスの噴流に直接曝されることとなり、この減圧弁座(63)が早期に劣化し易く、耐久性に劣り、減圧性能に悪影響を及ぼす虞もあった。 Furthermore, a pressure reducing valve seat (63) attached to the tip of the second rod (62) is an inlet passage (formed on the first rod (60) coaxially facing the second rod (62)). 59), the pressure reducing valve seat (63) is directly exposed to the jet of gas flowing into the pressure reducing valve chamber (69) from the inlet passage (59). The seat (63) is likely to deteriorate early, has poor durability, and may have an adverse effect on the decompression performance.
本発明の技術的課題は上記の問題点を解消し、一次圧の変化に伴う二次圧の変化を小さく抑えることができるうえ、各部材の加工や組み立ての簡易化を図ることができ、さらには減圧弁座の耐久性の向上も図ることができる、減圧弁を提供することにある。 The technical problem of the present invention is to solve the above-described problems, to suppress a change in secondary pressure accompanying a change in primary pressure, and to simplify the processing and assembly of each member, Is to provide a pressure reducing valve that can also improve the durability of the pressure reducing valve seat.
本発明は、上記の課題を解決するために、例えば、本発明の実施の形態を示す図1から図6に基づいて説明すると、次のように構成したものである。
すなわち、本発明は減圧弁に関し、ハウジング(2)内に形成された減圧弁室(17)と、この減圧弁室(17)に設けられた減圧弁座(12)と、この減圧弁座(12)に対し進退移動できる弁体(19)と、上記の減圧弁座(12)よりも下流側に形成された二次圧力室(15)と、この二次圧力室(15)の圧力を受けて進退移動するとともに上記の弁体(19)と連動連結されたピストン部材(3)と、上記の弁体(19)を減圧弁座(12)から離隔させる方向へ付勢する減圧ばね(4)とを備え、上記の減圧弁室(17)に連通するガス流入口(10)と二次圧力室(15)に連通するガス流出口(7)とをハウジング(2)の外面に開口した減圧弁であって、
上記のハウジング(2)内にシリンダ室(9)を形成して、このシリンダ室(9)の内面に上記のピストン部材(3)を保密摺動自在に挿入し、このピストン部材(3)の一側に上記の二次圧力室(15)を形成するとともに、ピストン部材(3)の他側にロッド挿入穴(16)をシリンダ室(9)の軸線方向に沿って設け、上記のハウジング(2)からシリンダ室(9)内に向けてロッド(11)を突設し、このロッド(11)を上記のロッド挿入穴(16)へ挿入して、このロッド(11)の外面とロッド挿入穴(16)の内面との間を保密摺動部(27)で摺動自在にシールし、ロッド挿入穴(16)内のこの保密摺動部(27)よりも奥側に上記の減圧弁室(17)を形成し、この減圧弁室(17)と上記のガス流入口(10)とを連通する入口路(25)を上記のロッド(11)内に形成し、上記の減圧弁室(17)に挿入されたロッド(11)の先端部に上記の減圧弁座(12)を形成し、上記のロッド挿入穴(16)の奥壁でこの減圧弁座(12)と対面する位置に、減圧弁室(17)と上記の二次圧力室(15)及びガス流出口(7)とを連通する出口路(18)を設け、この出口路(18)の減圧弁室(17)側開口を取り囲む状態に上記の弁体(19)を設け、上記のピストン部材(3)の進退移動によりこの弁体(19)が上記の減圧弁座(12)に対し接近・離反するように構成し、この減圧弁座(12)に当接した弁体(19)のシール径を、上記の保密摺動部(27)でのシール径と略同一に設定したことを特徴とする。
In order to solve the above-described problems, the present invention is described as follows, for example, based on FIGS. 1 to 6 showing an embodiment of the present invention.
That is, the present invention relates to a pressure reducing valve, a pressure reducing valve chamber (17) formed in the housing (2), a pressure reducing valve seat (12) provided in the pressure reducing valve chamber (17), and a pressure reducing valve seat ( 12), a valve body (19) capable of moving forward and backward, a secondary pressure chamber (15) formed downstream of the pressure reducing valve seat (12), and the pressure in the secondary pressure chamber (15) The piston member (3) interlocked and connected to the valve body (19) and a pressure reducing spring for urging the valve body (19) away from the pressure reducing valve seat (12). 4), and the gas inlet (10) communicating with the pressure reducing valve chamber (17) and the gas outlet (7) communicating with the secondary pressure chamber (15) are opened on the outer surface of the housing (2). A pressure reducing valve,
A cylinder chamber (9) is formed in the housing (2), and the piston member (3) is slidably inserted into the inner surface of the cylinder chamber (9). The secondary pressure chamber (15) is formed on one side, and a rod insertion hole (16) is provided on the other side of the piston member (3) along the axial direction of the cylinder chamber (9). 2) Project the rod (11) into the cylinder chamber (9), insert this rod (11) into the rod insertion hole (16), insert the rod (11) outer surface and the rod The inside of the hole (16) is slidably sealed with the seal sliding part (27), and the pressure reducing valve is located behind the seal sliding part (27) in the rod insertion hole (16). Forming a chamber (17), and forming an inlet passage (25) in the rod (11) for communicating the pressure reducing valve chamber (17) and the gas inlet (10), the pressure reducing valve chamber At the tip of the rod (11) inserted in (17) The pressure reducing valve seat (12) is formed, and the pressure reducing valve chamber (17) and the secondary pressure chamber are located at a position facing the pressure reducing valve seat (12) on the back wall of the rod insertion hole (16). (15) and an outlet passage (18) communicating with the gas outlet (7) are provided, and the valve body (19) is provided in a state surrounding the opening of the outlet passage (18) on the pressure reducing valve chamber (17) side. The valve member (19) is configured to approach and separate from the pressure reducing valve seat (12) by the forward and backward movement of the piston member (3), and the valve is in contact with the pressure reducing valve seat (12). The seal diameter of the body (19) is set to be substantially the same as the seal diameter in the above-described tight sliding portion (27).
このように構成された減圧弁によれば、ガス流入口(10)から入口路(25)を経て減圧弁室(17)に流入するガスは、減圧弁座(12)と弁体(19)との間を通過することにより減圧され、出口路(18)を経て二次圧力室(15)へ流入するとともにガス流出口(7)から取り出される。このとき、ピストン部材(3)が受ける二次圧と減圧ばね(4)の弾圧力とのバランスで、ピストン部材(3)が移動して弁体(19)が減圧弁座(12)に接近・離反し、これにより二次圧が所定圧力に減圧される。 According to the pressure reducing valve configured in this way, the gas flowing from the gas inlet (10) into the pressure reducing valve chamber (17) through the inlet passage (25) is supplied to the pressure reducing valve seat (12) and the valve body (19). The pressure is reduced by passing between the gas and the gas, and flows into the secondary pressure chamber (15) through the outlet passage (18) and is taken out from the gas outlet (7). At this time, the balance of the secondary pressure received by the piston member (3) and the elastic pressure of the pressure reducing spring (4) moves the piston member (3) so that the valve element (19) approaches the pressure reducing valve seat (12). -It separates and this reduces the secondary pressure to a predetermined pressure.
即ち、二次圧力室(15)内の二次圧が高くなると、ピストン部材(3)が減圧ばね(4)の弾圧力に抗して弁体(19)が減圧弁座(12)に近接する方向に移動する。これにより、減圧弁座(12)と弁体(19)との間を通過するガス量が少なくなり、二次圧が低下する。反対に、二次圧力室(15)内の二次圧が低下すると、ピストン部材(3)が減圧ばね(4)に弾圧されて弁体(19)が減圧弁座(12)から離れる方向に移動する。これにより、減圧弁座(12)と弁体(19)との間を通過するガス量が多くなり、二次圧が上昇する。 That is, when the secondary pressure in the secondary pressure chamber (15) becomes high, the piston member (3) resists the elastic pressure of the pressure reducing spring (4) and the valve element (19) comes close to the pressure reducing valve seat (12). Move in the direction you want. As a result, the amount of gas passing between the pressure reducing valve seat (12) and the valve element (19) decreases, and the secondary pressure decreases. On the other hand, when the secondary pressure in the secondary pressure chamber (15) decreases, the piston member (3) is elastically pressed by the pressure reducing spring (4) and the valve element (19) moves away from the pressure reducing valve seat (12). Moving. As a result, the amount of gas passing between the pressure reducing valve seat (12) and the valve body (19) increases, and the secondary pressure increases.
ここで、上記の減圧弁室(17)はピストン部材(3)のロッド挿入穴(16)内に形成され、従って減圧弁室(17)の周壁を構成するピストン部材(3)は、この減圧弁室(17)に流入する一次圧を受ける。しかし、減圧弁座(12)に当接した弁体(19)のシール径を、ロッド(11)の外面とロッド挿入穴(16)の内面との間の保密摺動部(27)でのシール径と略同一に設定してあるので、ピストン部材(3)に作用する一次圧は、弁体(19)が減圧弁座(12)から離れる開弁方向への力と、弁体(19)が減圧弁座(12)に接近する閉弁方向への力とが釣り合うこととなる。 Here, the pressure reducing valve chamber (17) is formed in the rod insertion hole (16) of the piston member (3). Therefore, the piston member (3) constituting the peripheral wall of the pressure reducing valve chamber (17) The primary pressure flowing into the valve chamber (17) is received. However, the seal diameter of the valve element (19) in contact with the pressure reducing valve seat (12) is adjusted so that the seal sliding part (27) between the outer surface of the rod (11) and the inner surface of the rod insertion hole (16) Since the seal diameter is set substantially the same, the primary pressure acting on the piston member (3) is the force in the valve opening direction in which the valve element (19) is separated from the pressure reducing valve seat (12), and the valve element (19 ) Balances the force in the valve closing direction approaching the pressure reducing valve seat (12).
上記の減圧弁は、上記の減圧弁室(17)の内周とロッド(11)の先端部外周との間に迂回路(24)を形成し、この迂回路(24)を介して、上記の入口路(25)を上記の減圧弁座(12)と弁体(19)間に連通させることができる。この場合は、ガス流入口(10)から流入するガスが入口路(25)から上記の迂回路(24)を経て弁体(19)に辿り着くこととなり、減圧弁室(17)に流入するガスの噴流が直接弁体(19)に吹き付けられることがない。この結果、ガス噴流に曝されることによる弁体(19)の劣化を防止でき、耐久性を向上できるので、長期に亙って減圧性能を高く維持することができる。 The pressure reducing valve forms a detour (24) between the inner periphery of the pressure reducing valve chamber (17) and the outer periphery of the tip of the rod (11), and the detour (24) The inlet passage (25) can be communicated between the pressure reducing valve seat (12) and the valve body (19). In this case, the gas flowing in from the gas inlet (10) reaches the valve body (19) from the inlet passage (25) via the bypass (24) and flows into the pressure reducing valve chamber (17). The gas jet is not directly blown onto the valve body (19). As a result, deterioration of the valve element (19) due to exposure to the gas jet can be prevented and durability can be improved, so that the decompression performance can be maintained high over a long period of time.
上記の減圧弁は、上記の出口路(18)を直線状に形成して、この出口路(18)を上記のガス流出口(7)へ直接に臨ませ、この出口路(18)から下流側を上記の二次圧力室(15)に連通し、このガス流出口(7)へ装着した充填治具(30)の先端をこの出口路(18)へ保密状に挿入可能に構成するとともに、この充填治具(30)の充填路(36)をこの出口路(18)内へ連通可能に構成することができる。この減圧弁をガス容器に取り付けた容器弁として用いている場合、空になったガス容器内へフレッシュガスを充填する際、ガス流出口(7)に充填治具(30)を取り付けると、この充填治具(30)の先端が出口路(18)へ保密状に挿入され、出口路(18)とその下流側の二次圧力室(15)との連通が遮断される。これにより、充填治具(30)の充填路(36)から供給されるフレッシュガスが二次圧力室(15)へ流入しないので、二次圧力室(15)内は圧力が上昇せず、この二次圧力室(15)の内圧でピストン部材(3)を閉弁方向へ押圧することが防止される。この結果、ピストン部材(3)は減圧ばね(4)に弾圧されて弁体(19)を減圧弁座(12)から離隔した開弁状態に保持され、フレッシュガスは、充填路から減圧弁室(17)と入口路(25)とガス流入口(10)を順に経てガス容器内へ充填される。従って、減圧弁からのガス取出路をガス充填経路に兼用することができ、バルブ装置に充填用接続口を別途設ける必要がないので、バルブ装置全体を簡略にすることができる。 In the pressure reducing valve, the outlet passage (18) is formed in a straight line so that the outlet passage (18) directly faces the gas outlet (7), and is downstream from the outlet passage (18). The side communicates with the secondary pressure chamber (15), and the tip of the filling jig (30) attached to the gas outlet (7) can be inserted into the outlet passage (18) in a tight manner. The filling path (36) of the filling jig (30) can be configured to communicate with the outlet path (18). When this pressure reducing valve is used as a container valve attached to a gas container, when a fresh gas is filled into an empty gas container, a filling jig (30) is attached to the gas outlet (7). The tip of the filling jig (30) is inserted into the outlet passage (18) in a tight manner, and the communication between the outlet passage (18) and the secondary pressure chamber (15) on the downstream side thereof is blocked. As a result, the fresh gas supplied from the filling passage (36) of the filling jig (30) does not flow into the secondary pressure chamber (15), so the pressure does not increase in the secondary pressure chamber (15). It is possible to prevent the piston member (3) from being pressed in the valve closing direction by the internal pressure of the secondary pressure chamber (15). As a result, the piston member (3) is elastically pressed by the pressure reducing spring (4) to keep the valve element (19) separated from the pressure reducing valve seat (12), and fresh gas flows from the filling passage to the pressure reducing valve chamber. The gas container is filled through (17), the inlet channel (25), and the gas inlet (10) in this order. Therefore, the gas extraction path from the pressure reducing valve can also be used as a gas filling path, and it is not necessary to separately provide a filling connection port in the valve apparatus, so that the entire valve apparatus can be simplified.
なお上記の弁体(19)は、例えば上記のロッド挿入穴(16)の内奥部に固定したパッキンやOリングで構成することができる。これ等の場合は、弾性材料からなるパッキンやOリングを弁体に容易に取り付けできる利点がある。 In addition, said valve body (19) can be comprised by the packing fixed to the inner back part of said rod insertion hole (16), or O-ring, for example. In these cases, there is an advantage that a packing or an O-ring made of an elastic material can be easily attached to the valve body.
また、上記の弁体(19)を、上記のロッド挿入穴(16)の内奥部に出口路(18)へ向けて窄まるテーパー状の金属面で構成し、上記の減圧弁座(12)を、上記のロッド(11)の先端部に固定されたパッキンで構成したり、この減圧弁座(12)を、上記のロッド(11)の先端部に形成された先窄まりのテーパー面を有する金属面で構成したりすることも可能である。これ等の場合は、シリンダ室(9)内で摺動するピストン部材(3)にパッキン等を固定するためのねじ構造が不要であり、ねじ部の弛みによる不具合を発生する虞がない。 Further, the valve body (19) is configured by a tapered metal surface that is narrowed toward the outlet passage (18) in the inner back portion of the rod insertion hole (16), and the pressure reducing valve seat (12 ) Is composed of a packing fixed to the tip of the rod (11), or the pressure reducing valve seat (12) is a tapered tapered surface formed at the tip of the rod (11). It is also possible to comprise a metal surface having In these cases, there is no need for a screw structure for fixing a packing or the like to the piston member (3) sliding in the cylinder chamber (9), and there is no possibility of causing problems due to loosening of the threaded portion.
本発明は上記のように構成され作用することから、次の効果を奏する。
(1) ピストン部材に作用する一次圧は、弁体が減圧弁座から離れる開弁方向への力と、弁体が減圧弁座に接近する閉弁方向への力とが釣り合うので、このピストン部材の減圧作動に一次圧の影響を受けにくくすることができ、この結果、一次圧の変化に起因する二次圧の変化量を大幅に低減することができる。
例えば、燃料電池自動車は、搭載の水素ガス容器に超高圧の状態で貯蔵された水素ガスを減圧弁によって減圧して燃料電池に供給するが、その燃料電池用の減圧弁に求められる性能としては大流量(例えば1000NL/min以上など)でかつ安定した一定圧力を満たすものが要求される。本発明の減圧弁は、こうした燃料電池用の減圧弁に使用すると超高圧の水素ガスを安定した一定圧力に減圧して燃料電池に供給できるので、好適である。
Since the present invention is configured and operates as described above, the following effects can be obtained.
(1) The primary pressure acting on the piston member is a balance between the force in the valve opening direction in which the valve element moves away from the pressure reducing valve seat and the force in the valve closing direction in which the valve element approaches the pressure reducing valve seat. The pressure reduction operation of the member can be made less susceptible to the influence of the primary pressure, and as a result, the amount of change in the secondary pressure due to the change in the primary pressure can be greatly reduced.
For example, in a fuel cell vehicle, hydrogen gas stored in an on-board hydrogen gas container is decompressed by a pressure reducing valve and supplied to the fuel cell. The performance required for the pressure reducing valve for the fuel cell is as follows. A large flow rate (for example, 1000 NL / min or more) and a stable constant pressure are required. When the pressure reducing valve of the present invention is used in such a pressure reducing valve for a fuel cell, it is preferable because ultrahigh pressure hydrogen gas can be reduced to a stable constant pressure and supplied to the fuel cell.
(2) ピストン部材をハウジングのシリンダ室内へ保密摺動自在に挿入するとともに、このピストン部材内のロッド挿入穴に、ハウジング内面から突設した1つのロッドを挿入するだけでよく、ピストン内へ2つのロッド部材を両側から同軸上に挿入する前記の従来技術と異なって、ハウジングやピストン部材などの各部材の加工が容易であるうえ、しかも簡単に組み付けることができる。 (2) The piston member is inserted into the cylinder chamber of the housing so as to be slidably closed, and only one rod protruding from the inner surface of the housing is inserted into the rod insertion hole in the piston member. Unlike the prior art in which two rod members are coaxially inserted from both sides, each member such as a housing and a piston member can be easily processed and can be easily assembled.
(3) ピストン部材は、シリンダ室の内周との間、およびロッド挿入穴の内周とロッドとの間の2箇所のみを摺動自在にシールすればよく、3箇所を摺動自在にシールする前記の従来技術と異なって、保密摺動自在にシールする箇所が少なく済み、この点からも加工や組み付けを簡単にすることができるうえ、ピストン部材の摺動性と保密性を両立させて良好な減圧性能を容易に得ることができる。 (3) The piston member need only be slidably sealed between the inner periphery of the cylinder chamber and between the inner periphery of the rod insertion hole and the rod. Unlike the prior art described above, there are fewer places to seal in a tightly slidable manner. From this point, the processing and assembly can be simplified, and the slidability and the tightness of the piston member are both compatible. Good decompression performance can be easily obtained.
以下、本発明の実施の形態を図面に基づき説明する。
図1と図2は本発明の第1実施形態を示し、図1は減圧弁の断面図、図2は充填治具を取り付けた状態の減圧弁の断面図である。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a first embodiment of the present invention, FIG. 1 is a sectional view of a pressure reducing valve, and FIG. 2 is a sectional view of the pressure reducing valve with a filling jig attached thereto.
図1に示すように、この減圧弁(1)は、例えばガス容器に取り付ける容器弁や配管に取り付ける配管弁などに使用され、ハウジング(2)とピストン部材(3)と減圧ばね(4)とを備える。 As shown in FIG. 1, this pressure reducing valve (1) is used, for example, as a container valve attached to a gas container or a pipe valve attached to piping, and includes a housing (2), a piston member (3), a pressure reducing spring (4), Is provided.
上記のハウジング(2)は、円筒状のハウジング本体(5)と、このハウジング本体(5)の一端開口部(5a)を塞ぐ蓋部材(6)とを有する。この蓋部材(6)は上記の一端開口部(5a)に螺着固定してある。但し本発明では、他の固定手段で蓋部材をハウジング本体に固定してもよい。上記のハウジング本体(5)の他端開口部にはガス流出口(7)が形成してあり、このガス流出口(7)と蓋部材(6)の内面との間にシリンダ室(9)が設けてある。上記の蓋部材(6)の外側端面の中央にはガス流入口(10)が設けてある。そしてこの蓋部材(6)の内面中央に、上記のシリンダ室(9)内に向けてロッド(11)が一体に突設してある。 The housing (2) includes a cylindrical housing body (5) and a lid member (6) that closes one end opening (5a) of the housing body (5). The lid member (6) is screwed and fixed to the one end opening (5a). However, in the present invention, the lid member may be fixed to the housing body by other fixing means. A gas outlet (7) is formed at the other end opening of the housing body (5), and a cylinder chamber (9) is formed between the gas outlet (7) and the inner surface of the lid member (6). Is provided. A gas inlet (10) is provided at the center of the outer end face of the lid member (6). A rod (11) protrudes integrally from the center of the inner surface of the lid member (6) toward the cylinder chamber (9).
上記のピストン部材(3)は、上記のシリンダ室(9)に軸線方向へ往復動自在に内嵌してあり、シリンダ室(9)の内周面に摺動する拡張径部分(3a)と、この拡張径部分(3a)の蓋部材(6)側の一側の中央から蓋部材(6)側に向けて突設された小径の縮小径部分(3b)とを有する。ピストン部材(3)の拡張径部分(3a)の外周とシリンダ室(9)の内周との間は、拡張径部分(3a)に付設されたシール部材(14)で保密摺動自在にシールしてある。このピストン部材(3)の他側には、上記のガス流出口(7)との間に二次圧力室(15)が形成してある。 The piston member (3) is fitted in the cylinder chamber (9) so as to reciprocate in the axial direction, and has an expanded diameter portion (3a) that slides on the inner peripheral surface of the cylinder chamber (9). The extended diameter portion (3a) has a small diameter reduced diameter portion (3b) projecting from the center on one side of the lid member (6) toward the lid member (6). Between the outer periphery of the expanded diameter portion (3a) of the piston member (3) and the inner periphery of the cylinder chamber (9), a seal member (14) attached to the expanded diameter portion (3a) is sealed so as to be able to slide tightly. It is. On the other side of the piston member (3), a secondary pressure chamber (15) is formed between the piston member (3) and the gas outlet (7).
上記のピストン部材(3)の縮小径部分(3b)の中心にはロッド挿入穴(16)が設けてあり、上記のロッド(11)はこのロッド挿入穴(16)に、軸線方向へ往復動可能に挿入してある。このロッド(11)の外周とロッド挿入穴(16)の内周との間は、ロッド挿入穴(16)に付設されたシール部材からなる保密摺動部(27)で摺動自在にシールしてある。 A rod insertion hole (16) is provided at the center of the reduced diameter portion (3b) of the piston member (3), and the rod (11) reciprocates in the axial direction in the rod insertion hole (16). Inserted as possible. The space between the outer periphery of the rod (11) and the inner periphery of the rod insertion hole (16) is slidably sealed by a seal sliding part (27) made of a seal member attached to the rod insertion hole (16). It is.
上記のピストン部材(3)は、拡張径部分(3a)がシリンダ室(9)の内周面に摺動自在に内嵌され、縮小径部分(3b)に形成したロッド挿入穴(16)がロッド(11)の外周面に摺動自在に外嵌されるだけであり、しかも保密摺動自在にシールする箇所は、拡張径部分(3a)とシリンダ室(9)内周面との間と、保密摺動部(27)との2箇所のみであるので、加工や組付が簡単であり、ピストン部材の摺動性と保密性を容易に両立させて良好な減圧性能を得ることができる。 The piston member (3) has an expanded diameter portion (3a) slidably fitted in the inner peripheral surface of the cylinder chamber (9), and a rod insertion hole (16) formed in the reduced diameter portion (3b). The portion that is only slidably fitted on the outer peripheral surface of the rod (11) and that is sealed so as to be slidable is between the expanded diameter portion (3a) and the inner peripheral surface of the cylinder chamber (9). Since there are only two places with the sealing sliding portion (27), the processing and assembly are simple, and it is possible to easily achieve both the sliding performance and the sealing performance of the piston member and to obtain a good decompression performance. .
上記のロッド挿入穴(16)内には、この保密摺動部(27)よりも奥側に、ロッド(11)の外径よりも大きい内径の減圧弁室(17)が形成してある。上記のロッド(11)内には、この減圧弁室(17)と上記のガス流入口(10)とを互いに連通する入口路(25)が形成してあり、減圧弁室(17)に挿入されたこのロッド(11)の先端部に減圧弁座(12)が設けてある。一方、ロッド挿入穴(16)の奥壁でこの減圧弁座(12)と対面する位置に、減圧弁室(17)と上記の二次圧力室(15)及びガス流出口(7)とを連通する出口路(18)が設けてある。そしてこの出口路(18)の減圧弁室(17)側端部には、その開口全体を取り囲む状態にパッキンからなる弁体(19)が設けてある。なお、この出口路(18)は直線状に形成してあり、その下流側開口は上記の二次圧力室(15)を介して上記のガス流出口(7)へ直接に臨ませてある。 In the rod insertion hole (16), a pressure reducing valve chamber (17) having an inner diameter larger than the outer diameter of the rod (11) is formed on the back side of the seal sliding portion (27). In the rod (11), there is formed an inlet passage (25) that connects the pressure reducing valve chamber (17) and the gas inlet (10) to each other, and is inserted into the pressure reducing valve chamber (17). A pressure reducing valve seat (12) is provided at the tip of the rod (11). On the other hand, the pressure reducing valve chamber (17), the secondary pressure chamber (15) and the gas outlet (7) are arranged at a position facing the pressure reducing valve seat (12) on the back wall of the rod insertion hole (16). There is an exit channel (18) that communicates. A valve body (19) made of packing is provided at the end of the outlet passage (18) on the pressure reducing valve chamber (17) side so as to surround the entire opening. The outlet passage (18) is formed in a straight line, and its downstream opening directly faces the gas outlet (7) through the secondary pressure chamber (15).
上記の弁体(19)は、ピストン部材(3)とは別体に形成される弁体押さえ部材(20)を使用することで、ピストン部材(3)内へ簡易に設置される。すなわち、ピストン部材(3)の減圧弁室(17)とは反対側の端面に、この減圧弁室(17)よりも大きい内径の弁体装着穴(21)を減圧弁室(17)と連通状に設ける一方、弁体押さえ部材(20)に上記の出口路(18)を貫通状に設け、この出口路(18)の一端側にその全周を囲むよう環状のパッキンからなる弁体(19)を嵌め込む。そしてこの弁体押さえ部材(20)をピストン部材(3)の弁体装着穴(21)へ螺着等により固定し、弁体(19)を弁体装着穴(21)の内底に押し付けて減圧弁室(17)に臨ませる。この構造によれば、弁体(19)が弁体押さえ部材(20)により確実に固定され、またこの弁体押さえ部材(20)をピストン部材(3)に対し着脱することで、弁体(19)を容易に交換することができる。 The valve body (19) is simply installed in the piston member (3) by using a valve body pressing member (20) formed separately from the piston member (3). That is, a valve body mounting hole (21) having an inner diameter larger than that of the pressure reducing valve chamber (17) is communicated with the pressure reducing valve chamber (17) on the end surface of the piston member (3) opposite to the pressure reducing valve chamber (17). On the other hand, the above-mentioned outlet passage (18) is provided in a penetrating manner in the valve body pressing member (20), and a valve body comprising an annular packing so as to surround the entire circumference on one end side of this outlet passage (18) ( 19) Fit. Then, the valve body holding member (20) is fixed to the valve body mounting hole (21) of the piston member (3) by screwing or the like, and the valve body (19) is pressed against the inner bottom of the valve body mounting hole (21). Let it face the pressure reducing valve chamber (17). According to this structure, the valve body (19) is securely fixed by the valve body pressing member (20), and the valve body (19) is attached to and detached from the piston member (3), so that the valve body ( 19) can be easily replaced.
上記の弁体(19)はピストン部材(3)に固定されているので、このピストン部材(3)の進退移動により上記の減圧弁座(12)に対し接近・離反する。この減圧弁座(12)に当接した弁体(19)のシール径は、上記の保密摺動部(27)でのシール径と実質的に同一径に形成してある。ここで両シール径が実質的に同一径であるとは、両者の受圧面積がほぼ同一であり、減圧弁室(17)内の一次圧でピストン部材(3)に加わる開弁方向(X1)への力と閉弁方向(X2)への力が同等になることをいう。 Since the valve body (19) is fixed to the piston member (3), the piston member (3) moves toward and away from the pressure-reducing valve seat (12) as the piston member (3) moves forward and backward. The seal diameter of the valve body (19) in contact with the pressure reducing valve seat (12) is formed to be substantially the same as the seal diameter at the above-described sealing sliding portion (27). Here, when both seal diameters are substantially the same diameter, the pressure receiving areas of both are substantially the same, and the valve opening direction (X1) applied to the piston member (3) by the primary pressure in the pressure reducing valve chamber (17). This means that the force to the valve is equal to the force in the valve closing direction (X2).
上記の減圧弁室(17)内には、この減圧弁室(17)の内周とロッド(11)の先端部の外周との間に環状の迂回路(24)が形成してある。ロッド(11)に形成された前記の入口路(25)は、この迂回路(24)を介して、上記の減圧弁座(12)と弁体(19)間に連通させてある。即ち、この入口路(25)は、ガス流入口(10)と連通するようロッド(11)の軸線方向に設けた軸線方向流路(25a)と、軸線方向流路(25a)の内奥と上記の迂回路(24)とが連通するよう直径方向に設けた径方向流路(25b)からなる。 In the pressure reducing valve chamber (17), an annular bypass (24) is formed between the inner periphery of the pressure reducing valve chamber (17) and the outer periphery of the tip of the rod (11). The inlet passage (25) formed in the rod (11) is communicated between the pressure reducing valve seat (12) and the valve body (19) via the bypass (24). In other words, the inlet channel (25) includes an axial channel (25a) provided in the axial direction of the rod (11) so as to communicate with the gas inlet (10), and an inner depth of the axial channel (25a). It consists of a radial flow path (25b) provided in the diametrical direction so as to communicate with the bypass (24).
上記のシリンダ(9)内には、ピストン部材(3)を挟んで二次圧力室(15)とは反対側に減圧ばね収容空間(28)が形成してある。減圧ばね(4)は圧縮コイルばね等により構成され、この減圧ばね収容空間(28)内で、蓋部材(6)の内面とピストン部材(3)の拡張径部分(3a)との間に配置してあり、弁体(19)が減圧弁座(12)から離反する開弁方向(X1)にピストン部材(3)を付勢している。なお、この実施形態では減圧ばね(4)を2本の圧縮コイルばねで構成してあるが、1本の圧縮コイルばねで構成してもよいことはいうまでもない。 A pressure reducing spring accommodating space (28) is formed in the cylinder (9) on the opposite side of the secondary pressure chamber (15) with the piston member (3) interposed therebetween. The pressure reducing spring (4) is constituted by a compression coil spring or the like, and is disposed between the inner surface of the lid member (6) and the expanded diameter portion (3a) of the piston member (3) in the pressure reducing spring accommodating space (28). The valve element (19) urges the piston member (3) in the valve opening direction (X1) away from the pressure reducing valve seat (12). In this embodiment, the pressure reducing spring (4) is constituted by two compression coil springs, but it goes without saying that it may be constituted by one compression coil spring.
次に、上記構成の減圧弁1の作動について説明する。
Next, the operation of the
ガス流入口(10)から流入するガスは入口路(25)を経て減圧弁室(17)に流入し、減圧弁座(12)と弁体(19)との間から出口路(18)を経てガス流出口(7)から取出される。このとき、入口路(25)から減圧弁室(17)に流入する噴流は、迂回路(24)を経て弁体(19)に辿り着くので、直接弁体(19)に吹き付けられることがない。従ってこの弁体(19)は、上記のガス噴流に曝されることによる劣化が防止される。 Gas flowing in from the gas inlet (10) flows into the pressure reducing valve chamber (17) through the inlet passage (25), and passes through the outlet passage (18) between the pressure reducing valve seat (12) and the valve body (19). Then, it is taken out from the gas outlet (7). At this time, the jet flowing into the pressure reducing valve chamber (17) from the inlet passage (25) reaches the valve body (19) via the detour (24), and thus is not directly blown onto the valve body (19). . Therefore, the valve element (19) is prevented from being deteriorated by being exposed to the gas jet.
上記の減圧弁室(17)に流入したガスの圧力、即ち一次圧は、減圧弁室(17)の周壁を構成しているピストン部材(3)に加わる。しかし、減圧弁座(12)に当接した弁体(19)のシール径を、上記の保密摺動部(27)でのシール径と略同一に設定してあるので、このピストン部材(3)に加わる一次圧は、弁体(19)が減圧弁座(12)から離れる開弁方向(X1)に働く力と、弁体(19)が減圧弁座(12)に接近する閉弁方向(X2)に働く力とが、互いに釣り合って相殺される。 The pressure of the gas flowing into the pressure reducing valve chamber (17), that is, the primary pressure is applied to the piston member (3) constituting the peripheral wall of the pressure reducing valve chamber (17). However, since the seal diameter of the valve body (19) in contact with the pressure reducing valve seat (12) is set to be substantially the same as the seal diameter at the above-described seal sliding portion (27), this piston member (3 ) Is applied to the valve body (19) in the valve opening direction (X1) away from the pressure reducing valve seat (12), and the valve closing direction in which the valve body (19) approaches the pressure reducing valve seat (12). The forces acting on (X2) are balanced against each other and offset.
上記の減圧弁室(17)内のガスは、減圧弁座(12)と弁体(19)との間を通過することで減圧され、出口路(18)から二次圧力室(15)に流入し、ガス流出口(7)へ案内される。この二次圧力室(15)に流入したガスは、上記の減圧された圧力(二次圧)により、上記のピストン部材(3)を弁体(19)が減圧弁座(12)に接近する閉弁方向(X2)へ押圧する。一方、このピストン部材(3)は、前記の減圧ばね(4)の弾圧力で弁体(19)が減圧弁座(12)から離反する開弁方向(X1)へ押圧されており、この結果、弁体(19)は、このピストン部材(3)が受ける二次圧と減圧ばね(4)の弾圧力とのバランスで開閉移動し、これにより二次圧力が所定の圧力に減圧される。 The gas in the pressure reducing valve chamber (17) is depressurized by passing between the pressure reducing valve seat (12) and the valve body (19), and is then discharged from the outlet passage (18) to the secondary pressure chamber (15). It flows in and is guided to the gas outlet (7). The gas that has flowed into the secondary pressure chamber (15) causes the valve body (19) to approach the pressure reducing valve seat (12) through the piston member (3) due to the reduced pressure (secondary pressure). Press in the valve closing direction (X2). On the other hand, the piston member (3) is pressed in the valve opening direction (X1) in which the valve element (19) is separated from the pressure reducing valve seat (12) by the elastic pressure of the pressure reducing spring (4). The valve element (19) is opened and closed in a balance between the secondary pressure received by the piston member (3) and the elastic pressure of the pressure reducing spring (4), whereby the secondary pressure is reduced to a predetermined pressure.
このとき、上記の減圧弁室(17)内の一次圧が弁体(19)に作用する力は、前述のとおり開弁方向(X1)に働く力と閉弁方向(X2)に働く力とが互いに釣り合っているので、ピストン部材(3)や弁体(19)の減圧作動に、一次圧の影響を受け難くすることができ、一次圧の変化に起因する二次圧の変化量を大幅に低減することができる。これにより、例えば、車載用燃料電池に搭載した超高圧の水素ガス容器から、燃料水素ガスを安定した一定圧力に減圧して供給する場合に有効に使用できる。 At this time, the force that the primary pressure in the pressure reducing valve chamber (17) acts on the valve element (19) includes the force acting in the valve opening direction (X1) and the force acting in the valve closing direction (X2) as described above. Can be made less affected by the primary pressure in the pressure reducing operation of the piston member (3) and the valve body (19), greatly increasing the amount of change in the secondary pressure due to the change in the primary pressure. Can be reduced. Thus, for example, the fuel hydrogen gas can be effectively used when supplied from an ultra-high pressure hydrogen gas container mounted on an in-vehicle fuel cell while reducing the fuel hydrogen gas to a stable constant pressure.
次に、上記の減圧弁(1)がガス容器に付設された容器弁に組み込まれており、貯蔵ガスが消費されて空になった場合に、この減圧弁を通してガス容器へフレッシュガスを充填する手順について説明する。
図2に示すように、この減圧弁(1)を通してフレッシュガスを充填する場合は、上記のガス流出口(7)に充填治具(30)が螺着等により装着される。この充填治具(30)は、ガス流出口(7)に螺着固定される治具本体(33)と、この治具本体(33)の先端に突設した細径の差込突起部(34)とを備えており、この治具本体(33)と差込突起部(34)とを貫通する状態に充填路(36)が形成してある。
Next, the pressure reducing valve (1) is incorporated in a container valve attached to the gas container, and when the stored gas is consumed and emptied, the gas container is filled with fresh gas through the pressure reducing valve. The procedure will be described.
As shown in FIG. 2, when the fresh gas is filled through the pressure reducing valve (1), the filling jig (30) is attached to the gas outlet (7) by screwing or the like. The filling jig (30) includes a jig main body (33) screwed and fixed to the gas outlet (7), and a small-diameter insertion protrusion (projected from the tip of the jig main body (33)). 34), and a filling path (36) is formed so as to pass through the jig body (33) and the insertion protrusion (34).
上記の出口路(18)は直線状に形成されて上記のガス流出口(7)へ直接に臨ませてあり、上記の充填治具(30)をガス流出口(7)へ装着することにより、上記の差込突起部(34)がこの出口路(18)内に保密状に挿入される。この結果、上記の充填路(36)は出口路(18)内を介して減圧弁室(17)に連通するが、この出口路(18)とその下流側の二次圧力室(15)との連通は遮断される。 The outlet passage (18) is formed in a straight line and directly faces the gas outlet (7). By attaching the filling jig (30) to the gas outlet (7), The insertion protrusion (34) is inserted into the outlet passage (18) in a tightly packed manner. As a result, the filling path (36) communicates with the pressure reducing valve chamber (17) through the outlet path (18), and the outlet path (18) and the secondary pressure chamber (15) on the downstream side thereof Communication is blocked.
上記の充填治具(30)の充填路(36)からフレッシュガスを供給すると、このフレッシュガスは出口路(18)には流入するが、二次圧力室(15)へは流入しない。このため、ピストン部材(3)はフレッシュガスの高圧で閉弁方向(X2)へ押圧されることがなく、弁体(19)は減圧ばね(4)の弾圧力で開弁方向(X1)へ押圧されて、開弁状態に保持される。この結果、上記の出口路(18)に流入したフレッシュガスは、弁体(19)と減圧弁座(12)との間を通って減圧弁室(17)へ流入し、入口路(25)とガス流入口(10)とを順に経て、図外のガス容器内へ案内され、円滑に充填される。従って、上記の減圧弁(1)からのガスの取出路をフレッシュガスの充填経路に兼用することができ、バルブ装置に充填用接続口を別途設ける必要がないので、バルブ装置全体を簡略にすることができる。 When fresh gas is supplied from the filling passage (36) of the filling jig (30), the fresh gas flows into the outlet passage (18) but does not flow into the secondary pressure chamber (15). Therefore, the piston member (3) is not pressed in the valve closing direction (X2) by the high pressure of fresh gas, and the valve body (19) is moved in the valve opening direction (X1) by the elastic force of the pressure reducing spring (4). It is pressed and held in the valve open state. As a result, the fresh gas that has flowed into the outlet passage (18) flows between the valve element (19) and the pressure reducing valve seat (12) into the pressure reducing valve chamber (17), and enters the inlet passage (25). And the gas inlet (10) in this order, are guided into a gas container (not shown) and filled smoothly. Accordingly, the gas extraction path from the pressure reducing valve (1) can be used also as a fresh gas charging path, and it is not necessary to separately provide a charging connection port in the valve apparatus, thus simplifying the entire valve apparatus. be able to.
上記の第1実施形態では、弁体(19)を環状のパッキンで形成した。しかし本発明では、例えば図3から図5に示すように、この弁体を他の形状や構造にすることができる。 In said 1st Embodiment, the valve body (19) was formed with the annular packing. However, in the present invention, for example, as shown in FIGS. 3 to 5, the valve body can have other shapes and structures.
即ち、図3に示す第2実施形態では、弁体(19)がOリングで構成してあり、このOリングからなる弁体(19)は、ピストン部材(3)とは別体に形成された弁体保持部材(37)の先端部の外周に付設してある。そしてこの弁体保持部材(37)をピストン部材(3)の弁体装着穴(21)に螺着することで、この弁体(19)を減圧弁室(17)に臨ませてある。この場合、減圧弁座(12)はロッド(11)の先端部に形成された環状突起で構成してある。その他の構成は上記の第1実施形態と同様であり、同様に作用するので説明を省略する。 That is, in 2nd Embodiment shown in FIG. 3, the valve body (19) is comprised with the O-ring, and the valve body (19) consisting of this O-ring is formed separately from the piston member (3). And attached to the outer periphery of the tip of the valve body holding member (37). The valve body holding member (37) is screwed into the valve body mounting hole (21) of the piston member (3) so that the valve body (19) faces the pressure reducing valve chamber (17). In this case, the pressure reducing valve seat (12) is formed by an annular protrusion formed at the tip of the rod (11). The other configuration is the same as that of the first embodiment described above, and functions in the same manner, so that the description thereof is omitted.
図4に示す第3実施形態では、弁体(19)が、金属製のピストン部材(3)のロッド挿入穴(16)の内奥部に、出口路(18)へ向けて窄まるテーパー状の平滑な金属面(コーティングを含む)で構成してある。この弁体(19)と対面する減圧弁座(12)は、ロッド(11)の先端部にかしめ等で固定された、例えば先窄まりのテーパー面を有する截頭円錐形状のパッキンで構成してある。 In the third embodiment shown in FIG. 4, the valve element (19) has a tapered shape that is narrowed toward the outlet passage (18) in the inner part of the rod insertion hole (16) of the metal piston member (3). The smooth metal surface (including the coating). The pressure-reducing valve seat (12) facing the valve body (19) is constituted by, for example, a frustoconical packing having a tapered surface that is tapered and fixed to the tip of the rod (11) by caulking or the like. It is.
図5に示す第4実施形態では、上記の第3実施形態と同様、弁体(19)が、金属製のピストン部材(3)のロッド挿入穴(16)の内奥部に、出口路(18)に向けて窄まるテーパー状の平滑な金属面(コーティングを含む)で構成してある。但し上記の第3実施形態と異なり、この第4実施形態では、弁体(19)と減圧弁座(12)とに、いわゆるメタルシール方式を採用してある。即ち、上記の弁体(19)と対面する減圧弁座(12)は、金属製のロッド(11)の先端部に形成された、先窄まりのテーパー面を有する截頭円錐形状に形成された平滑な金属面で構成してある。 In the fourth embodiment shown in FIG. 5, as in the third embodiment, the valve body (19) is disposed in the inner back of the rod insertion hole (16) of the metal piston member (3). It is composed of a tapered smooth metal surface (including coating) that narrows toward 18). However, unlike the third embodiment described above, the fourth embodiment employs a so-called metal seal system for the valve body (19) and the pressure reducing valve seat (12). That is, the pressure reducing valve seat (12) facing the valve body (19) is formed in a frustoconical shape having a tapered surface formed at the tip of the metal rod (11). It is composed of a smooth metal surface.
なお、上記の第3実施形態や第4実施形態では、上記の第1実施形態と異なって出口路(18)がピストン部材(3)自体に形成してある。また、ロッド(11)は蓋部材(6)と一体に形成するに代えて、蓋部材(6)とは別体に形成し、蓋部材(6)の内面にガス流入口(10)と連通すように設けたロッド装着穴(40)へ、この別体のロッド(11)を螺着固定してある。
但し本発明ではこの第3実施形態においても、上記の出口路(18)をピストン部材(3)とは別の部材に形成して、これをピストン部材(3)に固定してもよく、また、上記のロッド(11)を蓋部材(6)と一体に形成してもよい。さらに、上記の第1実施形態や第2実施形態においても、出口路(18)をピストン部材(3)に直接形成してもよく、また、ロッド(11)を蓋部材(6)と別体に形成してもよい。
In the third and fourth embodiments, unlike the first embodiment, the outlet passage (18) is formed in the piston member (3) itself. The rod (11) is formed separately from the lid member (6) instead of being formed integrally with the lid member (6), and is connected to the gas inlet (10) on the inner surface of the lid member (6). This separate rod (11) is screwed and fixed to a rod mounting hole (40) provided so as to pass therethrough.
However, in the present invention also in the third embodiment, the outlet passage (18) may be formed on a member different from the piston member (3) and fixed to the piston member (3). The rod (11) may be formed integrally with the lid member (6). Further, in the first and second embodiments described above, the outlet passage (18) may be formed directly on the piston member (3), and the rod (11) is separated from the lid member (6). You may form in.
図6は本発明の第5実施形態を示す、減圧弁の断面図である。
上記の各実施形態では、上記の出口路(18)をガス流出口(7)に直接に臨ませたが、この第5実施形態では、出口路(18)とガス流出口(7)との間をL字状のガス流出路(41)で接続してあり、このガス流出路(41)の中間部にガス逃し路(42)を分岐し、このガス逃し路(42)に二次安全弁(43)が付設してある。なお、上記の二次安全弁(43)は、上記の第1実施形態と同様、この減圧弁(1)のハウジング(2)から省略してもよい。また、上記の第1実施形態などにおいても、出口路とガス流出口との間の流路や二次圧力室などに連通するガス逃し路を設け、このガス逃し路に二次安全弁を付設してもよい。
FIG. 6 is a sectional view of a pressure reducing valve showing a fifth embodiment of the present invention.
In each of the above embodiments, the outlet channel (18) is directly faced to the gas outlet (7). However, in the fifth embodiment, the outlet channel (18) and the gas outlet (7) are connected to each other. Are connected by an L-shaped gas outflow passage (41), and a gas relief passage (42) is branched to an intermediate portion of the gas outflow passage (41), and a secondary safety valve is connected to the gas escape passage (42). (43) is attached. The secondary safety valve (43) may be omitted from the housing (2) of the pressure reducing valve (1) as in the first embodiment. Also in the first embodiment, a gas relief passage communicating with the flow path between the outlet passage and the gas outlet and the secondary pressure chamber is provided, and a secondary safety valve is attached to the gas relief passage. May be.
上記の各実施形態で説明した減圧弁は、本発明の技術的思想を具体化するために例示したものであり、ハウジングやピストン部材、減圧ばねなど、各部材の形状や構造、材質、配置等を、これらの実施形態等に限定するものではなく、本発明の特許請求の範囲内において種々の変更を加え得るものであり、また、取り扱う流体も特定の種類に限定されないことはいうまでもない。 The pressure reducing valve described in each of the above embodiments is exemplified to embody the technical idea of the present invention. The shape, structure, material, arrangement, etc. of each member such as a housing, a piston member, a pressure reducing spring, etc. However, the present invention is not limited to these embodiments and the like, and various modifications can be made within the scope of the claims of the present invention. Needless to say, the fluid to be handled is not limited to a specific type. .
本発明の減圧弁は、一次圧の変化に伴う二次圧の変化を小さく抑えることができるうえ、各部材の加工や組み立ての簡易化を図ることができ、さらには弁シートの耐久性の向上も図ることができるので、特に燃料電池用水素ガス供給装置に用いられる減圧弁に特に好適であるが、他の流体を扱う配管弁や容器弁などにも好適に用いられる。 The pressure reducing valve of the present invention can suppress a change in the secondary pressure accompanying a change in the primary pressure, can simplify the processing and assembly of each member, and further improves the durability of the valve seat. Therefore, it is particularly suitable for a pressure reducing valve used in a hydrogen gas supply device for a fuel cell, but is also suitably used for a piping valve, a container valve, etc. for handling other fluids.
1…減圧弁
2…ハウジング
3…ピストン部材
4…減圧ばね
7…ガス流出口
9…シリンダ室
10…ガス流入口
11…ロッド
12…減圧弁座
15…二次圧力室
16…ロッド挿入穴
17…減圧弁室
18…出口路
19…弁体
24…迂回路
25…入口路
25a…軸線方向流路
25b…径方向流路
27…保密摺動部
30…充填治具
36…充填路
DESCRIPTION OF
10 ... Gas inlet
11 ... Rod
12 ... Pressure reducing valve seat
15 ... Secondary pressure chamber
16 ... Rod insertion hole
17 ... Reducing valve chamber
18 ... Exit road
19 ... Valve
24 ... Detour
25 ... Entrance
25a ... Axial direction flow path
25b ... radial flow path
27 ... Closed sliding part
30 ... Filling jig
36 ... Filling path
Claims (7)
上記のハウジング(2)内にシリンダ室(9)を形成して、このシリンダ室(9)の内面に上記のピストン部材(3)を保密摺動自在に挿入し、このピストン部材(3)の一側に上記の二次圧力室(15)を形成するとともに、ピストン部材(3)の他側にロッド挿入穴(16)をシリンダ室(9)の軸線方向に沿って設け、
上記のハウジング(2)からシリンダ室(9)内に向けてロッド(11)を突設し、このロッド(11)を上記のロッド挿入穴(16)へ挿入して、このロッド(11)の外面とロッド挿入穴(16)の内面との間を保密摺動部(27)で摺動自在にシールし、ロッド挿入穴(16)内のこの保密摺動部(27)よりも奥側に上記の減圧弁室(17)を形成し、この減圧弁室(17)と上記のガス流入口(10)とを連通する入口路(25)を上記のロッド(11)内に形成し、
上記の減圧弁室(17)に挿入されたロッド(11)の先端部に上記の減圧弁座(12)を形成し、上記のロッド挿入穴(16)の奥壁でこの減圧弁座(12)と対面する位置に、減圧弁室(17)と上記の二次圧力室(15)及びガス流出口(7)とを連通する出口路(18)を設け、
この出口路(18)の減圧弁室(17)側開口を取り囲む状態に上記の弁体(19)を設け、上記のピストン部材(3)の進退移動によりこの弁体(19)が上記の減圧弁座(12)に対し接近・離反するように構成し、この減圧弁座(12)に当接した弁体(19)のシール径を、上記の保密摺動部(27)でのシール径と略同一に設定したことを特徴とする、減圧弁。 A pressure reducing valve chamber (17) formed in the housing (2), a pressure reducing valve seat (12) provided in the pressure reducing valve chamber (17), and a valve body capable of moving forward and backward relative to the pressure reducing valve seat (12) (19), a secondary pressure chamber (15) formed on the downstream side of the pressure reducing valve seat (12), and moves forward and backward in response to the pressure of the secondary pressure chamber (15) and the valve A piston member (3) interlocked with the body (19), and a pressure reducing spring (4) for urging the valve body (19) away from the pressure reducing valve seat (12). A pressure reducing valve having a gas inlet (10) communicating with the valve chamber (17) and a gas outlet (7) communicating with the secondary pressure chamber (15) opened on the outer surface of the housing (2),
A cylinder chamber (9) is formed in the housing (2), and the piston member (3) is slidably inserted into the inner surface of the cylinder chamber (9). The secondary pressure chamber (15) is formed on one side, and a rod insertion hole (16) is provided on the other side of the piston member (3) along the axial direction of the cylinder chamber (9).
A rod (11) is projected from the housing (2) into the cylinder chamber (9), the rod (11) is inserted into the rod insertion hole (16), and the rod (11) The outer surface and the inner surface of the rod insertion hole (16) are slidably sealed by the seal sliding part (27), and the back side of the seal sliding part (27) in the rod insertion hole (16). The pressure reducing valve chamber (17) is formed, and an inlet passage (25) communicating the pressure reducing valve chamber (17) and the gas inlet (10) is formed in the rod (11).
The pressure reducing valve seat (12) is formed at the tip of the rod (11) inserted into the pressure reducing valve chamber (17), and the pressure reducing valve seat (12 is formed at the back wall of the rod insertion hole (16). ) Is provided with an outlet passage (18) for communicating the pressure reducing valve chamber (17) with the secondary pressure chamber (15) and the gas outlet (7).
The valve body (19) is provided so as to surround the opening of the outlet passage (18) on the side of the pressure reducing valve chamber (17), and the valve body (19) is reduced in pressure by the forward and backward movement of the piston member (3). The seal diameter of the valve body (19), which is configured to approach and separate from the valve seat (12) and is in contact with the pressure reducing valve seat (12), is the seal diameter at the above-mentioned sealing sliding portion (27). A pressure reducing valve characterized by being set to be substantially the same as
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104776256A (en) * | 2015-03-23 | 2015-07-15 | 山东省天安矿业集团有限公司 | Mine high-flow-rate high-pressure water depressurization device |
CN108374921A (en) * | 2018-05-07 | 2018-08-07 | 厦门云智共创科技有限公司 | A kind of fluid line pressure relief assembly and fluid line |
CN112513505A (en) * | 2018-08-09 | 2021-03-16 | 伊格尔工业股份有限公司 | Pressure reducing valve |
CN113137507A (en) * | 2021-05-20 | 2021-07-20 | 天津航宇卓然科技有限公司 | Command type pressure reducer |
CN113513705A (en) * | 2021-05-13 | 2021-10-19 | 重庆凯瑞动力科技有限公司 | High-pressure hydrogen combined bottle mouth valve for vehicle |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5213524U (en) * | 1975-07-18 | 1977-01-31 | ||
JPS61214012A (en) * | 1985-03-20 | 1986-09-22 | Ckd Corp | Pressure control valve |
JP2002049426A (en) * | 2000-05-23 | 2002-02-15 | Neriki:Kk | Gas filling device |
JP2004038982A (en) * | 2002-07-12 | 2004-02-05 | Tescom Corp | Pipe decompression adjustment apparatus |
JP2004245366A (en) * | 2003-02-14 | 2004-09-02 | Asahi Organic Chem Ind Co Ltd | Vacuum regulator |
-
2006
- 2006-09-11 JP JP2006245060A patent/JP2008065727A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5213524U (en) * | 1975-07-18 | 1977-01-31 | ||
JPS61214012A (en) * | 1985-03-20 | 1986-09-22 | Ckd Corp | Pressure control valve |
JP2002049426A (en) * | 2000-05-23 | 2002-02-15 | Neriki:Kk | Gas filling device |
JP2004038982A (en) * | 2002-07-12 | 2004-02-05 | Tescom Corp | Pipe decompression adjustment apparatus |
JP2004245366A (en) * | 2003-02-14 | 2004-09-02 | Asahi Organic Chem Ind Co Ltd | Vacuum regulator |
Cited By (11)
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---|---|---|---|---|
CN104776256A (en) * | 2015-03-23 | 2015-07-15 | 山东省天安矿业集团有限公司 | Mine high-flow-rate high-pressure water depressurization device |
CN108374921A (en) * | 2018-05-07 | 2018-08-07 | 厦门云智共创科技有限公司 | A kind of fluid line pressure relief assembly and fluid line |
CN108374921B (en) * | 2018-05-07 | 2023-10-27 | 谷力(厦门)科技有限公司 | Decompression assembly for fluid pipeline and fluid pipeline |
CN112513505A (en) * | 2018-08-09 | 2021-03-16 | 伊格尔工业股份有限公司 | Pressure reducing valve |
CN113513705A (en) * | 2021-05-13 | 2021-10-19 | 重庆凯瑞动力科技有限公司 | High-pressure hydrogen combined bottle mouth valve for vehicle |
CN113513705B (en) * | 2021-05-13 | 2023-02-17 | 重庆凯瑞动力科技有限公司 | High-pressure hydrogen combined bottle mouth valve for vehicle |
CN113137507A (en) * | 2021-05-20 | 2021-07-20 | 天津航宇卓然科技有限公司 | Command type pressure reducer |
CN114776859A (en) * | 2022-05-20 | 2022-07-22 | 亚普汽车部件(开封)有限公司 | Vehicle pressure reducing valve with adjustable output pressure |
CN114776859B (en) * | 2022-05-20 | 2024-06-11 | 亚普汽车部件(开封)有限公司 | Pressure reducing valve with adjustable output pressure for vehicle |
WO2024023333A1 (en) * | 2022-07-29 | 2024-02-01 | Ferton Holding S.A. | System for producing a powder-gas jet for performing a dental treatment |
CN116899333A (en) * | 2023-02-10 | 2023-10-20 | 百灵气动科技有限公司 | Precise pressure reducing valve |
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