JPH1194199A - Safety structure of piston type pressure reducing device with v-packing - Google Patents
Safety structure of piston type pressure reducing device with v-packingInfo
- Publication number
- JPH1194199A JPH1194199A JP27668297A JP27668297A JPH1194199A JP H1194199 A JPH1194199 A JP H1194199A JP 27668297 A JP27668297 A JP 27668297A JP 27668297 A JP27668297 A JP 27668297A JP H1194199 A JPH1194199 A JP H1194199A
- Authority
- JP
- Japan
- Prior art keywords
- packing
- piston
- cylinder
- safety structure
- inner peripheral
- 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.)
- Granted
Links
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はＶパッキン付きピス
トン型減圧装置の安全構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety structure for a piston type pressure reducing device with V packing.
【０００２】[0002]
【従来の技術】ピストンの外周にＶパッキンを嵌装し、
シリンダーに横穴を貫設し、シリンダーの内壁面に拡径
部や縦溝を設けてこの拡径部や縦溝を横穴でシリンダー
の外部へ開放させ、又は単に縦溝だけを設け、ピストン
が過剰（高）圧を受けてこのＶパッキンがこの横穴、拡
径部、縦溝に移動したときにガスをシリンダー外部へ放
出する安全構造が本件出願人により実用新案登録第２５
４８７４３号の中で提示されている。2. Description of the Related Art A V-packing is fitted around the outer periphery of a piston,
The cylinder is provided with a horizontal hole, and an enlarged portion and a vertical groove are provided on the inner wall surface of the cylinder, and the expanded portion and the vertical groove are opened to the outside of the cylinder with a horizontal hole. A safety structure that releases gas to the outside of the cylinder when the V-packing moves to the horizontal hole, the enlarged diameter portion, or the vertical groove under the (high) pressure has a utility model registration No. 25 by the present applicant.
48743.
【０００３】[0003]
【発明が解決しようとする課題】上記の構造の場合、ピ
ストンの外周に嵌装されたＶパッキンの密封部には、こ
の密封部の外側面、即ちＶ溝面と反対側の外側の面、を
シリンダーの内周壁面に圧接させるように、常に内側か
ら圧力がかかっているので、ピストンが移動してＶパッ
キンがガス放出口に到達すると、Ｖパッキンの密封部が
ピストンの半径方向外方へ押し出され、密封部がガス放
出口を塞いでしまうことがある。こうなると異常に上昇
した圧力のガスを放出できず、減圧装置の破壊を惹き起
こしたりして甚だ危険となったり、パッキンが放出口に
強く圧接することによりパッキンを損傷してしまう。In the case of the above structure, the sealing portion of the V packing fitted on the outer periphery of the piston has an outer surface of the sealing portion, that is, an outer surface opposite to the V groove surface. When the piston moves and the V-packing reaches the gas discharge port, the sealing portion of the V-packing moves outward in the radial direction of the piston so that It may be pushed out and the seal may block the gas outlet. In such a case, the gas at an abnormally high pressure cannot be released, which may cause destruction of the decompression device, causing a serious danger, or damage to the packing due to the packing being strongly pressed against the discharge port.
【０００４】本発明は上昇したガスの圧力をＶパッキン
の密封部の内側面、即ちＶ溝面と反対側の内側の面、に
作用させるようにして放出口の閉塞をなくし、確実にガ
スを放出できる安全構造を提供することを意図する。According to the present invention, the increased gas pressure acts on the inner surface of the sealing portion of the V-packing, that is, on the inner surface opposite to the V-groove surface, so that the discharge port is not blocked and the gas is reliably discharged. It is intended to provide a releasable safety structure.
【０００５】[0005]
【課題を解決するための手段】本発明にかかるＶパッキ
ン付きピストン型減圧装置の安全構造はシリンダーの側
壁の内周壁面に設けられた環状の凹溝にＶパッキンが装
入される。そして、該シリンダーに摺嵌するピストンに
その受圧端面と側面を連通させる放出路が設けられてい
る。According to the safety structure of the piston type pressure reducing device with a V-packing according to the present invention, the V-packing is inserted into an annular concave groove provided on an inner peripheral wall surface of a side wall of a cylinder. A discharge passage is provided for connecting the pressure-receiving end face and the side face of the piston slidingly fitted to the cylinder.
【０００６】該内周壁面に該Ｖパッキンの密封部と反対
側で該凹溝と連続する環状の隙間部が形成され、該側壁
には該隙間部に連通するように放出口が貫通して設けら
れていてもよい。On the inner peripheral wall surface, an annular gap portion is formed on the side opposite to the sealing portion of the V-packing and is continuous with the concave groove, and a discharge port penetrates the side wall so as to communicate with the gap portion. It may be provided.
【０００７】該放出路の該側面の該開口の縁に面取り部
が形成されていてもよい。A chamfer may be formed at an edge of the opening on the side surface of the discharge passage.
【０００８】[0008]
【発明の実施の形態】以下に本発明実施の形態を図面を
参照しつつ説明する。１は本発明の安全構造を適用した
ガス供給器を示してある。２は圧力ガス容器の取付部、
３は減圧部、４はガスの供給口である。このガス供給器
１は圧力ガス容器を下端部の取付部２に取り付けると、
穿針５によりこの容器の封板が開封され、一次側の圧力
Ｐ1の高圧ガスを減圧部３により減圧して、二次側の圧
力Ｐ2のガスを供給口４から供給する型式となってい
る。Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a gas supply to which the safety structure of the present invention is applied. 2 is a mounting part of the pressure gas container,
Reference numeral 3 denotes a pressure reducing unit, and reference numeral 4 denotes a gas supply port. When the gas supply device 1 attaches the pressure gas container to the attachment portion 2 at the lower end,
The sealing plate of this container is opened by the needle 5 and the high pressure gas of the primary side P 1 is depressurized by the decompression unit 3 to supply the gas of the secondary side P 2 from the supply port 4. ing.
【０００９】減圧部３はシリンダー６、このシリンダー
６に摺嵌するピストン７、このピストン７に背圧をかけ
るスプリング８、このスプリング８の他端を受けるスプ
リング受け９を備えている。このスプリング受け９はシ
リンダー６の一端外周に螺合するキャップ１０に螺合し
た調整ネジ１１によってその位置を移動し、これにより
スプリング８の圧力を調整するようになっている。The pressure reducing section 3 includes a cylinder 6, a piston 7 slidingly fitted to the cylinder 6, a spring 8 for applying a back pressure to the piston 7, and a spring receiver 9 for receiving the other end of the spring 8. The position of the spring receiver 9 is moved by an adjusting screw 11 screwed to a cap 10 screwed to the outer periphery of one end of the cylinder 6, thereby adjusting the pressure of the spring 8.
【００１０】シリンダー６の側壁３２の内周壁面１２に
環状の凹溝１３が設けられ、この凹溝１３にＶパッキン
１４が装入される。An annular groove 13 is provided in the inner peripheral wall surface 12 of the side wall 32 of the cylinder 6, and a V-packing 14 is inserted into the groove 13.
【００１１】ピストン７は、その受圧端面１５と側面１
６にそれぞれ開口１７と１８を有して両面１５と１６を
連通させる、ガスの放出路１９を備えている。図示のよ
うに受圧端面１５に環状の凹嵩２０がある場合、この凹
嵩２０を放出路１９の一部として利用できる。そして、
Ｖパッキン１４の密封部２１の内側面２２はピストン７
の側面１６に圧接している。The piston 7 has a pressure receiving end face 15 and a side face 1.
6 is provided with a gas discharge passage 19 which has openings 17 and 18 respectively and communicates the surfaces 15 and 16 with each other. As shown in the figure, when the pressure receiving end face 15 has an annular concave volume 20, the concave volume 20 can be used as a part of the discharge path 19. And
The inner surface 22 of the sealing portion 21 of the V-packing 14
Is pressed against the side surface 16.
【００１２】一次側の圧力Ｐ1のガス洩れ等により二次
側の圧力Ｐ2が上昇すると、ピストン７はスプリング８
を撓ませて上方へ移動する。When the pressure P 2 on the secondary side rises due to a gas leak of the pressure P 1 on the primary side, etc., the piston 7
To move upward.
【００１３】図２に示すように、放出路１９の側面１６
での開口１８がＶパッキン１４の密封部２１に到達する
とガス圧がこのＶパッキン１４の内側面２２を押圧して
この内側面２２を側面１６から離し、ガスはピストン７
とシリンダー６の隙間を通り、更にシリンダー６とキャ
ップ１０や、キャップ１０と調整ネジ１１の隙間を通っ
て外部へ放出される。As shown in FIG.
When the opening 18 reaches the sealing portion 21 of the V-packing 14, the gas pressure presses the inner surface 22 of the V-packing 14 and separates the inner surface 22 from the side 16 so that the gas is
And through the gap between the cylinder 6 and the cylinder 6, and further through the gap between the cylinder 10 and the cap 10 and between the cap 10 and the adjusting screw 11.
【００１４】このように、Ｖパッキン１４の密封部２１
はガス放出時にピストン７の側面１６から押し離される
ので、ピストンにＶパッキンを配装する従来型のように
密封部が放出路内に入り込んで放出路を塞いでしまうよ
うなことがなく、圧力放出が確実に行われ、減圧装置１
の破損を防ぐ。Thus, the sealing portion 21 of the V-packing 14
Is released from the side surface 16 of the piston 7 during gas release, so that the sealing portion does not enter the discharge passage and block the discharge passage unlike the conventional type in which the V packing is disposed on the piston, and the pressure is not increased. Release is ensured and the decompression device 1
Prevent damage.
【００１５】放出路１９の加工はピストン７の外部から
行えるので、加工や管理も容易となる。Since the processing of the discharge passage 19 can be performed from the outside of the piston 7, the processing and management become easy.
【００１６】内周壁面１２にＶパッキン１４の密封部２
１と反対側で凹溝１３と連続する環状の隙間部３１が形
成される。そして、シリンダー６の側壁３２には隙間部
３１に連通するようにガスの放出口３３が貫通して設け
られている。こうすると、圧力の上昇したガスは隙間部
３１から放出口３３を通ってシリンダー６の外部へ流出
するので、時間当りの大量の排気量を必要とする場合に
適合できる。The sealing portion 2 of the V packing 14 is provided on the inner peripheral wall 12.
An annular gap portion 31 that is continuous with the concave groove 13 on the side opposite to 1 is formed. A gas outlet 33 is provided through the side wall 32 of the cylinder 6 so as to communicate with the gap 31. In this way, the gas whose pressure has increased flows out of the cylinder 6 through the gap portion 31 through the discharge port 33, so that it can be adapted to a case where a large amount of exhaust per hour is required.
【００１７】放出路１９の側面１６の開口１８の縁に面
取り部３４が形成されている。こうすると、ピストン７
がガス放出のためスプリング８を撓ませて移動したり、
ガス放出後にピストン７が原状に戻る際に開口１８の縁
がＶパッキン１４の密封部２１と当接して密封部２１を
損傷するのが、この面取り部３４により防がれる。A chamfer 34 is formed at the edge of the opening 18 in the side surface 16 of the discharge passage 19. Then, the piston 7
Deflects the spring 8 for gas release and moves,
The chamfered portion 34 prevents the edge of the opening 18 from contacting the sealing portion 21 of the V-packing 14 and damaging the sealing portion 21 when the piston 7 returns to its original shape after gas release.
【００１８】[0018]
【発明の効果】本発明のＶパッキン付きピストン型減圧
装置の安全構造によると、シリンダの内周壁面にＶパッ
キンを配装し、ピストンにその受圧端面と側面を直通さ
せる放出路を設けたので、二次圧が所定の値以上に高圧
になった場合、ピストンが移動して放出路がＶパッキン
の密封部に到達するとこの高圧ガスでＶパッキンの密封
部をピストンの側面から押し離して流出することにな
り、ガス放出を確実に行える。According to the safety structure of the piston type pressure reducing device with the V packing of the present invention, the V packing is disposed on the inner peripheral wall surface of the cylinder, and the piston is provided with the discharge passage for directly passing the pressure receiving end face and the side face. When the secondary pressure becomes higher than a predetermined value, the piston moves and the discharge path reaches the sealed portion of the V-packing, and the high-pressure gas pushes the sealed portion of the V-packing away from the side surface of the piston to flow out. Therefore, gas can be released reliably.
【００１９】請求項２によると、圧力の上昇したガスは
隙間部から放出口を通ってシリンダーの外部へ流出する
ので、時間当りの大量の排気量を必要とする場合に適合
できる。According to the second aspect, the gas whose pressure has increased flows out of the cylinder through the discharge port from the gap, so that it can be adapted to a case where a large amount of exhaust air per hour is required.
【００２０】請求項３によると、ピストンがガス放出の
ためスプリングを撓ませて移動したり、ガス放出後にピ
ストンが原状に戻る際に開口の縁がＶパッキンの密封部
と当接して密封部を損傷するのを、この面取り部により
防ぐことができる。According to the third aspect, the piston moves by bending the spring to release the gas, or when the piston returns to the original state after releasing the gas, the edge of the opening comes into contact with the sealing portion of the V-packing to close the sealing portion. Damage can be prevented by this chamfer.
【図１】本発明にかかる安全構造の具体例を採用したＶ
パッキン付きピストン型減圧装置の切断側面図である。FIG. 1 shows a V adopting a specific example of a safety structure according to the present invention.
It is a cut side view of the piston type pressure reducing device with packing.
【図２】同安全構造の作用の詳細説明図である。FIG. 2 is a detailed explanatory view of the operation of the safety structure.
６ シリンダー ７ ピストン １２ 内周壁面 １３ 凹溝 １４ Ｖパッキン １５ 受圧端面 １６ 側面 １７ 開口 １８ 開口 １９ 放出路 ２１ 密封部 ３１ 隙間部 ３２ 側壁 ３３ 放出口 ３４ 面取り部 Reference Signs List 6 Cylinder 7 Piston 12 Inner peripheral wall surface 13 Concave groove 14 V packing 15 Pressure receiving end face 16 Side face 17 Opening 18 Opening 19 Discharge path 21 Sealing part 31 Gap part 32 Side wall 33 Discharge port 34 Chamfer part
Claims (3)
2)に設けられた環状の凹溝(13)にＶパッキン(14)が装入
され、該シリンダー(6)に摺嵌するピストン(7)にその受
圧端面(15)と側面(16)を連通させる放出路(19)が設けら
れていることを特徴とするＶパッキン付きピストン型減
圧装置の安全構造。An inner peripheral wall (1) of a side wall (32) of a cylinder (6).
A V-packing (14) is inserted into an annular groove (13) provided in (2), and a pressure-receiving end surface (15) and a side surface (16) are fitted to a piston (7) slidingly fitted to the cylinder (6). A safety structure for a piston-type pressure reducing device with a V-packing, wherein a discharge passage (19) for communication is provided.
封部(21)と反対側で該凹溝(13)と連続する環状の隙間部
(31)が形成され、該側壁(32)には該隙間部(31)に連通す
るように放出口(33)が貫通して設けられている請求項１
に記載のＶパッキン付きピストン型減圧装置の安全構
造。2. An annular gap portion which is continuous with the groove (13) on the inner peripheral wall surface (12) on the side opposite to the sealing portion (21) of the V-packing (14).
2. A discharge port (33) is provided through the side wall (32) so as to communicate with the gap (31).
The safety structure of the piston type decompression device with the V-packing according to the above.
縁に面取り部(34)が形成されている請求項１に記載のＶ
パッキン付きピストン型減圧装置の安全構造。3. The V according to claim 1, wherein a chamfer (34) is formed at an edge of the opening (18) in the side surface (16) of the discharge passage (19).
Safety structure of piston type pressure reducing device with packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27668297A JP4142756B2 (en) | 1997-09-25 | 1997-09-25 | Safety structure of piston type pressure reducing device with V packing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27668297A JP4142756B2 (en) | 1997-09-25 | 1997-09-25 | Safety structure of piston type pressure reducing device with V packing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1194199A true JPH1194199A (en) | 1999-04-09 |
| JP4142756B2 JP4142756B2 (en) | 2008-09-03 |
Family
ID=17572860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27668297A Expired - Fee Related JP4142756B2 (en) | 1997-09-25 | 1997-09-25 | Safety structure of piston type pressure reducing device with V packing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4142756B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005207492A (en) * | 2004-01-22 | 2005-08-04 | Asahi Seisakusho Co Ltd | Decompression valve with safety device |
| JP2016118923A (en) * | 2014-12-19 | 2016-06-30 | 日酸Ｔａｎａｋａ株式会社 | Safety valve mechanism and pressure regulator |
| CN113915526A (en) * | 2021-10-26 | 2022-01-11 | 江剑 | High-temperature high-pressure cylinder sealing assembly |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011010640A1 (en) * | 2011-02-09 | 2012-08-09 | Emitec France S.A.S | Feed unit for conveying reducing agent |
-
1997
- 1997-09-25 JP JP27668297A patent/JP4142756B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005207492A (en) * | 2004-01-22 | 2005-08-04 | Asahi Seisakusho Co Ltd | Decompression valve with safety device |
| JP2016118923A (en) * | 2014-12-19 | 2016-06-30 | 日酸Ｔａｎａｋａ株式会社 | Safety valve mechanism and pressure regulator |
| CN113915526A (en) * | 2021-10-26 | 2022-01-11 | 江剑 | High-temperature high-pressure cylinder sealing assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4142756B2 (en) | 2008-09-03 |
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