JP2005004553A - Pressure reducing valve - Google Patents

Pressure reducing valve Download PDF

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Publication number
JP2005004553A
JP2005004553A JP2003168513A JP2003168513A JP2005004553A JP 2005004553 A JP2005004553 A JP 2005004553A JP 2003168513 A JP2003168513 A JP 2003168513A JP 2003168513 A JP2003168513 A JP 2003168513A JP 2005004553 A JP2005004553 A JP 2005004553A
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JP
Japan
Prior art keywords
valve
valve seat
pressure
pressure reducing
closed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003168513A
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Japanese (ja)
Inventor
Nobuyuki Kawamura
信之 川村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hamai Industries Ltd
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Hamai Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hamai Industries Ltd filed Critical Hamai Industries Ltd
Priority to JP2003168513A priority Critical patent/JP2005004553A/en
Publication of JP2005004553A publication Critical patent/JP2005004553A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a a long life pressure reducing valve to be used for the reduction of high pressure gas. <P>SOLUTION: A pressure reducing valve 1 is provided with a body B, a valve body 4 stored in the body B, and a spring 5 inserted between the valve body 4 and the body B. An aperture 222 formed on one end of an inflow path 22 is located on the center of a valve seat 232. Since the valve body 4 reciprocally moves in the body B and the closed face 431 of a tip moves between a closed state closing the valve seat 232 and an opened state separated from the valve seat 232, pressure is reduced from primary pressure to secondary pressure. Since the end of the valve seat 232 is brought into contact with the base end part of a raised part 432 formed at the center of the closed face 431 in the closed state, the contact area between the closed face 431 and the valve seat 232 is increased and the sealing performance and life of the pressure reducing valve are improved. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
この発明は、高圧ガスの減圧に用いられる減圧弁に関するものである。
【0002】
【従来の技術】
従来、高圧ガスを減圧する減圧弁は、弁室内に形成された弁座に対して、先端面を当接させて閉止する弁体を、2次圧室の圧力よって弁体を弁座方向へ押し戻す力と、スプリングと1次圧によって弁体を弁座から離す力との均衡によって、弁体が閉止位置(弁体が弁座に当接した位置)と開放位置(弁体が弁座から離れた位置)との間を往復動し、圧力を下げる作用を発揮するものである。
このような減圧弁は、例えば以下のような従来技術が存在する。
【0003】
【特許文献1】
特開2001−304499号、段落番号0022。
【0004】
【発明が解決しようとする課題】
弁体において、弁座に当接する面には、シール性を向上させるために、弁座を構成する金属よりも柔らかい材質で構成されたシール部材が設けられている。シール部材は、弁座よりも柔らかいため、弁体が繰り返し弁座に当接していくことによって、変形し十分なシール効果を発揮できなくなり、減圧性能が低下するといった問題があった。特に、高圧ガスを減圧する減圧弁では、弁座と弁体との接触部分に加わる圧力も高くなるため、一層シール部材の変形が著しく、寿命がさらに短くなるといった問題があった。
この発明の目的は、耐用期間が長い減圧弁を提供することにある。
【0005】
【課題を解決するための手段】
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) 1次圧ガスの流入口を中央に有する弁座を備えた弁室を有する本体と、
弁室内に収納され、前記弁座に押接されて流入口を塞ぐ閉鎖面を有し、開口を塞いだ閉鎖位置と閉鎖面が開口から離れた開放位置との間で、気密状態を維持しつつ復動可能な弁体と、
閉鎖面を構成するシール部材と、
弁室に連通した2次圧室と、
閉鎖面に形成された***部とを備え、
横断面の外郭が凸状に形成された弁座先端部は、閉鎖状態で***部の周縁部に当接している減圧弁。
【0006】
(2) ***部の周縁部は、テーパー面となっている上記(1)に記載の減圧弁。
【0007】
(3) 弁座先端部が***部に接触した状態では、弁座先端部と閉鎖面との間に隙間が形成されている上記(1)又は(2)に記載の減圧弁。
【0008】
(4) 減圧弁は、1次圧は、65MPa以上である上記(1)〜(3)のいずれか1に記載の減圧弁。
【0009】
【発明の実施の形態】
以下、本発明の好適実施形態について、添付図面に基づいて詳細に説明する。図1は、本発明の減圧弁の断面側面図である。本発明の減圧弁1は、本体Bと、本体B内に収納された弁体4と、弁体4と本体Bとの間に介挿されたスプリング5とを備えている。本体Bは、第1部材2と第2部材3とを有している。第1部材2は、1次圧側のガス流路やガス容器に接続される取付部21を有し、取付部21の外周には、雄ネジ部211が形成されている。取付部21の中心には、流入路22が形成され、その一端は、取付部21の先端に形成された流入口211に連通し、他端は、開口222に連通している。第1部材2の中心部には、第1シンリダ23が形成され、該第1シンリダ23の周囲には、輪状に形成された溝により収納部24が設けられている。収納部24には、スプリング5が収納される。収納部24の外側には、雄ネジが形成され、接続ネジ部25が形成されている。第1シリンダ23の底面には、弁座232が形成され、その中心には開口222が形成されている。
【0010】
図2は、弁座232の先端部分の断面形状を示す断面側面図である。弁座231は、開口222の周囲に形成された***部により構成され、先端断面は、円弧状の外郭となるように形成されている。
接続ネジ部25には、第2部材3が接続される。第2部材3は、円筒形状に形成され、一端には第1部材2が接続される接続口31が形成され、他端の中心部には、減圧されたガスが流出する流出口331が設けられている。接続口31の内側には、接続ネジ部25が螺合する接続ネジ部311が形成されている。接続口31の内側には、スプリング室32が形成され、スプリング室32の内側には、第2シリンダ34が形成されている。第2シリンダ34の端面には、中心部に流出路33が開口し、流出口331に連通している。第1部材2と第2部材3は、それぞれ同一軸線上に配置された状態で接続され、本体Bが構成される。そして、本体Bの内部には、スプリングを収納するスプリング室32と、弁体4を収納する第1シリンダ23、第2シリンダ34が同一軸線上に配置される。
【0011】
第1シリンダ23と第2シリンダ34には、弁体4が摺動自在に収納される。弁体4は、横断面が円形に形成され、第1シリンダ23内に摺動自在に収納される先端ピストン部41と、第2シリンダ34内に摺動自在に収納される後端ピストン部40とを備え、先端ピストン部41の端に位置する先端部42には、先端側にシール部材43が埋設され、シール部材43によって閉鎖面431が形成される。閉鎖面431は、弁座232に当接した際、開口222を閉止する。先端部42は、第1シリンダ23内に収容され、弁室231を画成する。
弁体4の中心には、軸線に沿って流通路44が形成され、その後端は弁体4の後端面に開口した流出孔442に連通し、先端は、先端部42の側面に開口した流入孔441に連通している。弁体4の後端面と、第2シリンダ34とによって、減圧室341が画成される。
【0012】
先端ピストンプ41と後端ピストン部40には、それぞれ第1Oリング46と第2Oリング47がそれぞれ外装されており、気密状態を維持しつつ、弁体4が、第1シリンダ23と第2シリンダ34内を摺動可能となるように構成されている。
このような構成により、弁室231と、2次圧室341は、それぞれ第1Oリング46と第2Oリング47によって、スプリング室32(外気)に対して気密状態に維持される。弁体4の外周面には、周方向に形成されたフランジが形成され、スプリング受45が設けられている。スプリング受45と、収納部24の間に、スプリング5が圧縮された状態で収納されている。このスプリング5によって、弁体4は、弁座232から離れる方向へ(開放位置方向へ)付勢される。
【0013】
このような構成において、流入路22から弁室231内に1次圧のガスが流入すると、流通路44を介して、2次圧室341のガス圧と、弁室231内のガス圧が等しくなり、径の大きい第2Oリング47を有する2次圧室341側から、弁体4を第2シリンダの外側に押し出す力が加わり、弁体4は、スプリング5の付勢力に抗して、弁座232へ押し付けられる。これにより、弁座232の開口222は塞がれ、2次圧室341へのガス流入は遮断される。ガス流入の遮断により、2次圧室341のガス圧は低下し、弁体4を閉鎖位置へ付勢する力が低下する。これにより、弁体4は、スプリング5の復帰力により、弁座232から離れる方向に移動し、開口222が開かれ、1次圧のガスが2次圧室341まで流入する。このように、弁体4が開放位置と閉鎖位置との間を往復動することによって、流出口331から流出するガス圧は、1次圧より低い2次圧に減圧される。
【0014】
弁体4の先端閉鎖面431には、中央部に***部432が形成されている。図2〜図4は、弁体4と***部432の位置関係を示す断面側面図である。***部432は、周端にテーパー面61(傾斜面)が形成されており、テーパー面61と閉鎖面431との境界部分を基端62として、閉鎖面431から***した状態に形成されている。
【0015】
弁座232の先端部71は、横断面形状における外郭72が半径rの円弧形状となるように、面取りされている。また、先端部71には、該横断面における弁座先端711(弁座を平面で塞いだ場合に、平面に最初に弁座が触れる先端点)から、内側と外側にむけて曲面が形成される。図3に示されているように、弁座先端部71において、外側に向けて形成された曲面と外側テーパー面との境界部分である外縁73は、***部432の基端62よりも外側に位置する。また、この実施形態では、弁座先端711も、基端62の外側に位置している。そして、図2に示されているように、開口222が閉鎖された閉鎖状態では、弁座先端部71の内側曲面が、***部432のテーパー面61に接触して開口222を閉鎖し、閉鎖面431と弁座先端711との間には、隙間δが形成されている。
【0016】
シール部材43は、例えば樹脂などの、弁座232に比較して柔らかい材料で構成されている。このため、閉鎖面431が弁座232に押接されると、弁座232に当接している部分が変形し、図4に示されているように、弁座先端部71が閉鎖面431内に没入する。この状態では、***部432が設けられているため、弁座先端部71とシール部材43との接触部分74の面積が広く取られ、シール性(気密性)が向上する。また、最初に***部432に接触し、この***部432を変形させつつ、閉鎖面431に圧接させられるため、閉鎖面431への没入量は、少なくなり、シール部材43の寿命を延ばすことができる。
【0017】
特に、例えば、65MPa以上の高圧ガス用の減圧弁では、弁体4は、より強い圧力で弁体が弁座232へ押し付けられるため、シール部材43の変形は著しい。このため、***部432に弁座先端部71が接触することで、没入量を抑制する上記構成は、特に有用である。しかも、没入量が抑制された状態で、かつシール性は良好に維持することができる。
【0018】
弁座先端部71について、シール部材43の閉鎖面431への没入量が抑制され、かつシール部材43との接触面積を増やしてシール性を確保させるためには、次のような位置関係であるとよい。例えば、弁座先端部71に弁体4を接近させ、最初にシール部材43と弁座先端部71が接触する位置が***部432のテーパー面61であること、又は、同様に最初の接触は、テーパー面61と閉鎖面431に同時に接触することである。換言すると、図3に示されているように、弁座先端711が、***部432の基端62に重なる位置又はその外側の位置であり、開口222の内径d1が、基端62の内側にあることである。
【0019】
【発明の効果】
請求項1に記載の発明によれば、***部に弁座先端部が当接しているので、弁座とシール部材との接触面積を広く取ることかでき、シール性能が向上する。また、***部に弁座先端部が接触していることから、弁座先端部のシール部材閉鎖面への没入を抑制することができ、シール部材の寿命を延ばすことができる。
請求項2に記載の発明によれば、***部のテーパー面に弁座先端部を当接させるので、***部の周方向における弁座先端部との接触圧をより均一にすることができ、シール性をさらに向上させることができる。
【0020】
請求項3に記載の発明によれば、弁座先端部が***部に接触した状態で、弁座先端部と閉鎖面との間に隙間が形成されるように、弁座先端部又は***部を形成することにより、確実に***部に弁座先端部を接触させることができる。このため、***部の変形が確実に得られ、閉鎖面への没入量の増大を抑制することができる。
請求項4に記載の発明によれば、高圧ガスの減圧に用いた場合には、特にシール部材の変形を効果的に抑制でき、耐用期間を延ばすことができる。
【図面の簡単な説明】
【図1】本発明の減圧弁の全体断面側面図である。
【図2】弁座とシール部材の位置関係を示す部分断面側面図である。
【図3】弁座とシール部材の位置関係を示す部分断面側面図である。
【図4】弁座とシール部材の位置関係を示す部分断面側面図である。
【符号の説明】
1 減圧弁
B 本体
2 第1部材
21 取付部
211 雄ネジ部
22 流入路
221 流入口
222 開口
23 第1シリンダ
231 弁室
232 弁座
24 収納部
25 接続ネジ部
3 第2部材
31 接続口
311 接続ネジ部
32 スプリング室
321 孔
33 流出路
331 流出口
34 第2シリンダ
341 2次圧室
4 弁体
40 後端ピストン部
41 先端ピストン部
42 先端部
43 シール部材
431 閉鎖面
432 ***部
44 流通路
441 流入孔
442 流出孔
45 スプリング受
46 第1Oリング
47 第2Oリング
5 スプリング
61 テーパー面
62 基端
63 変形部
71 弁座先端部
711 弁座先端
72 外郭
73 外縁
74 接触部分
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pressure reducing valve used for decompressing high-pressure gas.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a pressure reducing valve that decompresses high-pressure gas is configured such that a valve body that closes with a tip surface abutting against a valve seat formed in a valve chamber is moved in the valve seat direction by the pressure in the secondary pressure chamber. Due to the balance between the force to push back and the force that separates the valve element from the valve seat by the spring and the primary pressure, the valve element is in the closed position (position where the valve element contacts the valve seat) and the open position (the valve element is away from the valve seat). It reciprocates between the two) and exerts the action of lowering the pressure.
For such a pressure reducing valve, for example, the following prior art exists.
[0003]
[Patent Document 1]
JP 2001-304499 A, paragraph number 0022.
[0004]
[Problems to be solved by the invention]
In the valve body, a surface that contacts the valve seat is provided with a seal member made of a material softer than the metal constituting the valve seat in order to improve the sealing performance. Since the seal member is softer than the valve seat, there is a problem in that when the valve body is repeatedly in contact with the valve seat, the seal member is deformed so that a sufficient sealing effect cannot be exhibited, and the decompression performance is lowered. In particular, the pressure reducing valve for reducing the pressure of the high pressure gas has a problem that the pressure applied to the contact portion between the valve seat and the valve body is increased, so that the seal member is further deformed and the life is further shortened.
An object of the present invention is to provide a pressure reducing valve having a long service life.
[0005]
[Means for Solving the Problems]
The above object is achieved by the present invention described below.
(1) a main body having a valve chamber provided with a valve seat having a primary pressure gas inlet in the center;
It is housed in the valve chamber, has a closed surface that is pressed against the valve seat and closes the inlet, and maintains an airtight state between the closed position where the opening is closed and the open position where the closed surface is away from the opening. While returning valve body,
A sealing member constituting a closing surface;
A secondary pressure chamber communicating with the valve chamber;
A raised portion formed on the closed surface,
A pressure reducing valve in which a valve seat front end portion having a convex outer shape in cross section is in contact with a peripheral portion of a raised portion in a closed state.
[0006]
(2) The pressure reducing valve according to (1), wherein a peripheral portion of the raised portion is a tapered surface.
[0007]
(3) The pressure reducing valve according to (1) or (2), wherein a gap is formed between the valve seat front end portion and the closed surface when the valve seat front end portion is in contact with the raised portion.
[0008]
(4) The pressure reducing valve according to any one of (1) to (3), wherein the primary pressure is 65 MPa or more.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a cross-sectional side view of a pressure reducing valve of the present invention. The pressure reducing valve 1 of the present invention includes a main body B, a valve body 4 accommodated in the main body B, and a spring 5 interposed between the valve body 4 and the main body B. The main body B has a first member 2 and a second member 3. The first member 2 has a mounting portion 21 connected to the primary pressure side gas flow path and the gas container, and a male screw portion 211 is formed on the outer periphery of the mounting portion 21. An inflow path 22 is formed at the center of the attachment portion 21, one end of which communicates with an inflow port 211 formed at the tip of the attachment portion 21, and the other end communicates with an opening 222. A first cylinder 23 is formed at the center of the first member 2, and a storage section 24 is provided around the first cylinder 23 by a groove formed in a ring shape. The spring 5 is stored in the storage portion 24. A male screw is formed outside the storage portion 24, and a connection screw portion 25 is formed. A valve seat 232 is formed on the bottom surface of the first cylinder 23, and an opening 222 is formed at the center thereof.
[0010]
FIG. 2 is a cross-sectional side view showing the cross-sectional shape of the tip portion of the valve seat 232. The valve seat 231 is constituted by a raised portion formed around the opening 222, and the tip section is formed to have an arcuate outline.
The second member 3 is connected to the connection screw portion 25. The second member 3 is formed in a cylindrical shape, a connection port 31 to which the first member 2 is connected is formed at one end, and an outlet 331 through which the decompressed gas flows out is provided at the center of the other end. It has been. A connection screw portion 311 into which the connection screw portion 25 is screwed is formed inside the connection port 31. A spring chamber 32 is formed inside the connection port 31, and a second cylinder 34 is formed inside the spring chamber 32. On the end surface of the second cylinder 34, an outflow passage 33 opens at the center and communicates with the outflow port 331. The 1st member 2 and the 2nd member 3 are connected in the state arrange | positioned on the same axis line, respectively, and the main body B is comprised. Inside the main body B, a spring chamber 32 for storing the spring, and a first cylinder 23 and a second cylinder 34 for storing the valve body 4 are arranged on the same axis.
[0011]
The valve body 4 is slidably accommodated in the first cylinder 23 and the second cylinder 34. The valve body 4 has a circular cross section and has a front end piston portion 41 slidably accommodated in the first cylinder 23 and a rear end piston portion 40 slidably accommodated in the second cylinder 34. A seal member 43 is embedded in the tip end portion 42 located at the end of the tip piston portion 41, and a closing surface 431 is formed by the seal member 43. The closing surface 431 closes the opening 222 when contacting the valve seat 232. The distal end portion 42 is accommodated in the first cylinder 23 and defines a valve chamber 231.
A flow passage 44 is formed along the axis at the center of the valve body 4, a rear end thereof communicates with an outflow hole 442 opened at the rear end surface of the valve body 4, and a front end of the inflow opening at a side surface of the front end portion 42. It communicates with the hole 441. A decompression chamber 341 is defined by the rear end surface of the valve body 4 and the second cylinder 34.
[0012]
A first O-ring 46 and a second O-ring 47 are respectively mounted on the front end piston 41 and the rear end piston portion 40, and the valve body 4 is connected to the first cylinder 23 and the second cylinder 34 while maintaining an airtight state. It is configured to be slidable inside.
With such a configuration, the valve chamber 231 and the secondary pressure chamber 341 are maintained in an airtight state with respect to the spring chamber 32 (outside air) by the first O ring 46 and the second O ring 47, respectively. A flange formed in the circumferential direction is formed on the outer peripheral surface of the valve body 4, and a spring receiver 45 is provided. The spring 5 is stored in a compressed state between the spring receiver 45 and the storage portion 24. The valve body 4 is urged by the spring 5 in a direction away from the valve seat 232 (toward the open position).
[0013]
In such a configuration, when the primary pressure gas flows into the valve chamber 231 from the inflow passage 22, the gas pressure in the secondary pressure chamber 341 is equal to the gas pressure in the valve chamber 231 through the flow passage 44. Thus, a force for pushing the valve body 4 to the outside of the second cylinder is applied from the secondary pressure chamber 341 side having the second O-ring 47 having a large diameter, and the valve body 4 resists the urging force of the spring 5 to It is pressed against the seat 232. Thereby, the opening 222 of the valve seat 232 is closed, and the gas inflow to the secondary pressure chamber 341 is blocked. By shutting off the gas inflow, the gas pressure in the secondary pressure chamber 341 decreases, and the force for urging the valve body 4 to the closed position decreases. As a result, the valve body 4 is moved away from the valve seat 232 by the restoring force of the spring 5, the opening 222 is opened, and the primary pressure gas flows into the secondary pressure chamber 341. Thus, when the valve body 4 reciprocates between the open position and the closed position, the gas pressure flowing out from the outlet 331 is reduced to a secondary pressure lower than the primary pressure.
[0014]
A raised portion 432 is formed at the center of the tip closing surface 431 of the valve body 4. 2 to 4 are cross-sectional side views showing the positional relationship between the valve body 4 and the raised portion 432. The raised portion 432 has a tapered surface 61 (inclined surface) at the peripheral end, and is formed in a state of protruding from the closed surface 431 with the boundary portion between the tapered surface 61 and the closed surface 431 as the base end 62. .
[0015]
The tip 71 of the valve seat 232 is chamfered so that the outer shell 72 in the cross-sectional shape has an arc shape with a radius r. Further, a curved surface is formed on the distal end portion 71 from the valve seat distal end 711 in the transverse section toward the inner side and the outer side from the tip point where the valve seat first touches the plane when the valve seat is closed with a flat surface. The As shown in FIG. 3, in the valve seat distal end portion 71, the outer edge 73 that is a boundary portion between the curved surface formed outward and the outer tapered surface is outside the base end 62 of the raised portion 432. To position. In this embodiment, the valve seat front end 711 is also located outside the base end 62. As shown in FIG. 2, in the closed state in which the opening 222 is closed, the inner curved surface of the valve seat front end portion 71 comes into contact with the tapered surface 61 of the raised portion 432 to close the opening 222. A gap δ is formed between the surface 431 and the valve seat tip 711.
[0016]
The seal member 43 is made of a soft material, such as resin, compared to the valve seat 232. For this reason, when the closing surface 431 is pressed against the valve seat 232, the portion in contact with the valve seat 232 is deformed, and as shown in FIG. Immerse yourself in. In this state, since the raised portion 432 is provided, the area of the contact portion 74 between the valve seat distal end portion 71 and the seal member 43 is increased, and the sealing performance (air tightness) is improved. In addition, since the raised portion 432 is first contacted and pressed against the closing surface 431 while the protruding portion 432 is deformed, the amount of immersion in the closing surface 431 is reduced, and the life of the sealing member 43 can be extended. it can.
[0017]
In particular, for example, in a pressure reducing valve for high-pressure gas of 65 MPa or more, the valve body 4 is pressed against the valve seat 232 with a stronger pressure, so the deformation of the seal member 43 is significant. For this reason, the said structure which suppresses the amount of immersion by the valve-seat front-end | tip part 71 contacting the protruding part 432 is especially useful. In addition, it is possible to maintain good sealing performance in a state in which the amount of immersion is suppressed.
[0018]
The valve seat front end portion 71 has the following positional relationship in order to suppress the amount of immersion of the sealing member 43 into the closing surface 431 and increase the contact area with the sealing member 43 to ensure sealing performance. Good. For example, the valve body 4 is brought close to the valve seat front end portion 71, and the position where the seal member 43 and the valve seat front end portion 71 first contact is the tapered surface 61 of the raised portion 432. The taper surface 61 and the closing surface 431 are in contact with each other at the same time. In other words, as shown in FIG. 3, the valve seat distal end 711 is a position that overlaps or is a position outside the base end 62 of the raised portion 432, and the inner diameter d <b> 1 of the opening 222 is inside the base end 62. That is.
[0019]
【The invention's effect】
According to the first aspect of the invention, since the valve seat tip is in contact with the raised portion, the contact area between the valve seat and the seal member can be increased, and the sealing performance is improved. Moreover, since the valve seat front end is in contact with the raised portion, the immersion of the valve seat front end into the seal member closing surface can be suppressed, and the life of the seal member can be extended.
According to the invention described in claim 2, since the valve seat tip is brought into contact with the tapered surface of the raised portion, the contact pressure with the valve seat tip in the circumferential direction of the raised portion can be made more uniform, Sealability can be further improved.
[0020]
According to the third aspect of the present invention, the valve seat front end portion or the raised portion is formed such that a gap is formed between the valve seat front end portion and the closed surface in a state where the valve seat front end portion is in contact with the raised portion. By forming the valve seat, the valve seat tip can be reliably brought into contact with the raised portion. For this reason, a deformation | transformation of a protruding part is obtained reliably and the increase in the amount of immersion to a closed surface can be suppressed.
According to the fourth aspect of the present invention, when used for reducing the pressure of the high-pressure gas, the deformation of the seal member can be effectively suppressed, and the service life can be extended.
[Brief description of the drawings]
FIG. 1 is an overall sectional side view of a pressure reducing valve of the present invention.
FIG. 2 is a partial cross-sectional side view showing a positional relationship between a valve seat and a seal member.
FIG. 3 is a partial cross-sectional side view showing a positional relationship between a valve seat and a seal member.
FIG. 4 is a partial cross-sectional side view showing a positional relationship between a valve seat and a seal member.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pressure reducing valve B Main body 2 1st member 21 Attachment part 211 Male thread part 22 Inflow path 221 Inflow port 222 Opening 23 1st cylinder 231 Valve chamber 232 Valve seat 24 Storage part 25 Connection screw part 3 2nd member 31 Connection port 311 Connection Screw portion 32 Spring chamber 321 Hole 33 Outflow passage 331 Outlet 34 Second cylinder 341 Secondary pressure chamber 4 Valve body 40 Rear end piston portion 41 Front end piston portion 42 Front end portion 43 Seal member 431 Closed surface 432 Raised portion 44 Flow passage 441 Inflow hole 442 Outflow hole 45 Spring receiver 46 1st O-ring 47 2nd O-ring 5 Spring 61 Tapered surface 62 Base end 63 Deformed portion 71 Valve seat distal end 711 Valve seat distal end 72 Outline 73 Outer edge 74 Contact portion

Claims (4)

1次圧ガスの流入口を中央に有する弁座を備えた弁室を有する本体と、
弁室内に収納され、前記弁座に押接されて流入口を塞ぐ閉鎖面を有し、開口を塞いだ閉鎖位置と閉鎖面が開口から離れた開放位置との間で、気密状態を維持しつつ復動可能な弁体と、
閉鎖面を構成するシール部材と、
弁室に連通した2次圧室と、
閉鎖面に形成された***部とを備え、
横断面の外郭が凸状に形成された弁座先端部は、閉鎖状態で***部の周縁部に当接している減圧弁。
A body having a valve chamber with a valve seat having a primary pressure gas inlet in the center;
It is housed in the valve chamber, has a closed surface that is pressed against the valve seat and closes the inlet, and maintains an airtight state between the closed position where the opening is closed and the open position where the closed surface is away from the opening. While returning valve body,
A sealing member constituting a closing surface;
A secondary pressure chamber communicating with the valve chamber;
A raised portion formed on the closed surface,
A pressure reducing valve in which a valve seat front end portion having a convex outer shape in cross section is in contact with a peripheral portion of a raised portion in a closed state.
***部の周縁部は、テーパー面となっている請求項1に記載の減圧弁。The pressure reducing valve according to claim 1, wherein a peripheral portion of the raised portion is a tapered surface. 弁座先端部が***部に接触した状態では、弁座先端部と閉鎖面との間に隙間が形成されている請求項1又は2に記載の減圧弁。3. The pressure reducing valve according to claim 1, wherein a gap is formed between the valve seat front end portion and the closing surface in a state where the valve seat front end portion is in contact with the raised portion. 減圧弁は、1次圧は、65MPa以上である請求項1〜3のいずれか1に記載の減圧弁。The pressure reducing valve according to any one of claims 1 to 3, wherein the pressure reducing valve has a primary pressure of 65 MPa or more.
JP2003168513A 2003-06-12 2003-06-12 Pressure reducing valve Pending JP2005004553A (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007179374A (en) * 2005-12-28 2007-07-12 Nissan Tanaka Corp Pressure reducing valve
JP2009514728A (en) * 2005-11-09 2009-04-09 アンテルテクニク Air supply crew oxygen supply circuit
WO2012056647A1 (en) 2010-10-25 2012-05-03 川崎重工業株式会社 Decompression valve
JP2013080488A (en) * 2006-01-06 2013-05-02 Soc Bic Pressure adjusting valve
DE102013224815A1 (en) 2012-12-05 2014-06-05 Denso Corporation Pressure control valve for gaseous fuel supply system, has housing with inlet opening through which gaseous fuel is supplied from fuel tank and outlet opening through which pressure-regulated gaseous fuel is supplied to injection nozzle
US9337501B2 (en) 2003-07-29 2016-05-10 Intelligent Energy Limited Hydrogen-generating fuel cell cartridges
JP2017514203A (en) * 2014-02-27 2017-06-01 ルクセンブルグ・パテント・カンパニー・ソシエテ・アノニマLuxembourg Patent Company S.A. Pressure reducing valve with variable chamber in cap shape

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9337501B2 (en) 2003-07-29 2016-05-10 Intelligent Energy Limited Hydrogen-generating fuel cell cartridges
JP2009514728A (en) * 2005-11-09 2009-04-09 アンテルテクニク Air supply crew oxygen supply circuit
JP2007179374A (en) * 2005-12-28 2007-07-12 Nissan Tanaka Corp Pressure reducing valve
JP4574542B2 (en) * 2005-12-28 2010-11-04 日酸Tanaka株式会社 Pressure reducing valve
JP2013080488A (en) * 2006-01-06 2013-05-02 Soc Bic Pressure adjusting valve
WO2012056647A1 (en) 2010-10-25 2012-05-03 川崎重工業株式会社 Decompression valve
US9141115B2 (en) 2010-10-25 2015-09-22 Kawasaki Jukogyo Kabushiki Kaisha Pressure reducing valve
DE102013224815A1 (en) 2012-12-05 2014-06-05 Denso Corporation Pressure control valve for gaseous fuel supply system, has housing with inlet opening through which gaseous fuel is supplied from fuel tank and outlet opening through which pressure-regulated gaseous fuel is supplied to injection nozzle
JP2014111907A (en) * 2012-12-05 2014-06-19 Denso Corp Pressure control valve for gas fuel
JP2017514203A (en) * 2014-02-27 2017-06-01 ルクセンブルグ・パテント・カンパニー・ソシエテ・アノニマLuxembourg Patent Company S.A. Pressure reducing valve with variable chamber in cap shape

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