JPS58152976A - Reducing valve - Google Patents

Abstract

PURPOSE:To provide a reducing valve used in a respiratory device which can prevent generation of noise at the time of decompression by forming concave- convex portions on the inner wall adjacent to a valve seat of a passage to cause an eddy in gas. CONSTITUTION:Air flowing from a passage 72 into a valve chamber 76 is conducted from a passage 83 through a pressure chamber 89 to an air duct 7a. When the pressure in the pressure chamber 89 rises, a valve body 82 is lowered against a spring 88 and brought into contact with a valve seat 80 to keep airtightness. When air is discharged by inhalation of air to lower the pressure in the pressure chamber 89, the valve body 82 is raised so that high-pressure air in the valve chamber 76 is decompressed to flow into the passage 83. The inner wall adjacent to the valve seat 80 of the passage 83 is provided with concave- convex portions 103 formed thereon to cause an eddy in gas flowing from the valve chamber 76 into the passage 83.

Description

【発明の詳細な説明】 本発明は、たとえば呼吸器などに用いられる減圧弁に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressure reducing valve used, for example, in a respiratory system.

呼銃器では、圧力容器からの圧縮された空気やＶ素など
の１ｌＦｔ’岐用気体は減圧弁によって減圧して弁体に
導かれる。先行技術では、弁体を装着した者が吸気する
たび毎に、「ピー」という音を発生している。このよう
な音は、装着者にとって不快である。In a firearm, compressed air or 11Ft' branch gas such as V element from a pressure vessel is reduced in pressure by a pressure reducing valve and guided to a valve body. In the prior art, a beeping sound is generated every time the person wearing the valve body inhales. Such sounds are unpleasant for the wearer.

本発明の目的は、減圧時に音を発生しないようにした減
圧弁を提供することである。An object of the present invention is to provide a pressure reducing valve that does not generate noise during pressure reduction.

本発明に従えば、弁体８２を九座８０から遠ざかる方向
にばね８８によって付勢し、弁体８２に形成された流路
８３を介する気体圧によって、弁体８２がばね８８のば
ね力に抗して弁座８０の近接方向に変位されるようにし
た減圧弁において、流路８３の弁座８０に近接した内壁
に凹凸を形成したので一減圧時に「ピー」などの音を発
生することが防がれることになった。According to the present invention, the valve body 82 is biased by the spring 88 in a direction away from the nine seats 80, and the valve body 82 is influenced by the spring force of the spring 88 by the gas pressure through the flow path 83 formed in the valve body 82. In the pressure reducing valve which is displaced in the direction approaching the valve seat 80 against the pressure, unevenness is formed on the inner wall of the flow path 83 near the valve seat 80, so that a sound such as "beep" is generated when the pressure is reduced. was to be prevented.

以下、図面によって本発明の詳細な説明する。Hereinafter, the present invention will be explained in detail with reference to the drawings.

第１図は本発明の一実施例の全体の正面図である。FIG. 1 is an overall front view of an embodiment of the present invention.

この開放式呼吸器ｌは、呼吸用気体たとえば空気を加圧
充填し九圧力容器２、圧力容器２を収り換え自在に載荷
し人体に装着するための装着手段３、圧力容器２のガス
出口ＶＣ装着された容器弁４の開弁時に圧力容器２から
供給される高圧力の空気を減圧する減圧！！！５、容器
弁４および減圧＊ｓ′１に連結および取ね外し自在に連
結する連結手段６、減圧器５で減圧された後の空気を導
くための給気管７ａ、７ｂ、給気管７ｂに連結される肺
力弁８、肺力弁８および呼気弁９が固定的に設けられ人
体！７Ａ部の前面を覆う面体１０を含む。圧力容器２内
には、比較的高圧力たとえば３００　ｋｇ／ｃｍ　で空
気が充填される。This open-type respirator 1 is configured to be pressurized and filled with a breathing gas such as air, a pressure vessel 2, a mounting means 3 for repositioning and freely loading the pressure vessel 2, and a gas outlet of the pressure vessel 2. Pressure reduction to reduce the pressure of the high pressure air supplied from the pressure vessel 2 when the container valve 4 equipped with VC is opened! ! ! 5. A connecting means 6 which is connected and detachably connected to the container valve 4 and the pressure reducer *s'1, air supply pipes 7a and 7b for guiding the air after the pressure has been reduced by the pressure reducer 5, and connected to the air supply pipe 7b. The lung force valve 8, the lung force valve 8, and the exhalation valve 9 are fixedly installed in the human body! It includes a face piece 10 that covers the front surface of section 7A. The pressure vessel 2 is filled with air at a relatively high pressure, for example 300 kg/cm 2 .

第２図は開放式呼吸器１の簡略化した係統図であり、実
線は圧力容器２内の高圧力が直接作用する高圧力のライ
ンを示し、破線は減圧器５で減圧された後の低圧力のラ
インを示し、二重線は大気圧程度の圧力のラインを示す
。容器弁４の開弁時において、圧力容器２内の空気は容
器弁４から連結手段６を経て減圧器５に４かれ、この減
圧器５においてたとえば７〜８　ｋｇ／ｃｍ”に減圧さ
れる。FIG. 2 is a simplified relationship diagram of the open-type respirator 1, where the solid line shows the high pressure line on which the high pressure in the pressure vessel 2 directly acts, and the broken line shows the low pressure line after the pressure is reduced by the pressure reducer 5. A line of pressure is shown, and a double line shows a line of pressure around atmospheric pressure. When the container valve 4 is opened, the air in the pressure container 2 is discharged from the container valve 4 via the connecting means 6 to the pressure reducer 5, where the pressure is reduced to, for example, 7 to 8 kg/cm''.

減圧後の空気は給気管７ａ、７ｂを介して肺力弁８に導
かれる。肺力弁８に導かれた空ｇＬＦｉＩＪＩｉ体１０
を介して吸気され、一方、呼気は呼気弁９を介して排出
される。The reduced pressure air is guided to the pulmonary force valve 8 via the air supply pipes 7a, 7b. Empty gLFiIJIi body 10 guided by pulmonary force valve 8
Air is inhaled through the exhalation valve 9, while exhaled air is expelled through the exhalation valve 9.

第３図は減圧器５の平面図であり、第４図は減圧器５の
縦断面図である。第４図において、一点鎖線Ａ−Ａより
も下方の部分は第３図における切断面線Ｂ−Ｃ−Ｄから
見た断面を示し、一点鎖線Ａ−Ａよりも上方の部分は第
３図における切断面線Ｅ−Ｅから見た断面を示す。減圧
器５の本体７ＩＶｃＨ１接続体２８の流路４４に連通す
る流路７２が形成される。この流路７２Ｖ′１本体７１
に形成され本体７１の外方に開放した四部７３に連通さ
れる。この凹部７３に第４図の下方から嵌合部材７４を
嵌入し、その下方から押え部材７５を本体７１に螺合し
て嵌合部材７４１に固定することによって弁室７６が形
成される。前述の流路７２は嵌合部材７４に形成された
透孔７７を介して、弁室７６に連通される。押え部材７
５の弁室７６に臨む端面には嵌合凹部７８が形成される
。この嵌合凹部７８１Ｃ，合成樹脂製嵌合体７９をＯリ
ング８１を介して嵌入することによって、弁座８０が形
成される。3 is a plan view of the pressure reducer 5, and FIG. 4 is a longitudinal sectional view of the pressure reducer 5. In FIG. 4, the part below the dashed-dotted line A-A shows the cross section seen from the section line B-C-D in FIG. 3, and the part above the dashed-dotted line A-A in FIG. A cross section viewed from the cutting plane line EE is shown. A flow path 72 communicating with the flow path 44 of the main body 7IVcH1 connector 28 of the pressure reducer 5 is formed. This flow path 72V'1 main body 71
The four parts 73 of the main body 71 are open to the outside. The valve chamber 76 is formed by fitting the fitting member 74 into the recess 73 from below in FIG. 4, and screwing the pressing member 75 onto the main body 71 from below and fixing it to the fitting member 741. The aforementioned flow path 72 communicates with the valve chamber 76 via a through hole 77 formed in the fitting member 74 . Pressing member 7
A fitting recess 78 is formed in the end face facing the valve chamber 76 of No. 5. The valve seat 80 is formed by fitting the fitting recess 781C and the synthetic resin fitting body 79 through the O-ring 81.

弁体８２は空気の流路８３を備える円筒状であって、そ
の一端部は弁座８０に直交する方向で弁室７６内に気密
に突入される。ばね室８６に臨む弁体８２の他端部には
、比較的大きな受圧面積の受圧面８４を有する鍔部８５
が形成される。この一部８５の外周には、ばね室８６の
内Ｊ！に摺接するＯリング８７が設けられる。ばね室８
６内には、弁体８２を外囲するばね８８が収容されてお
り、このばね８８のばね力によって、弁体８２は弁座８
０から離反する方向に付勢されている。１１部８５の受
圧面８４とばね室８６の端部内壁とによって形成される
圧力室８９は、流路９０を介して接続口９１に連通され
る。接続口９１には給気管７ａが０リング９２を介して
嵌入されており、給気管７ａｒｉ袋ナツト９３によって
キャップ２５０に固定的に連結される。The valve body 82 has a cylindrical shape with an air passage 83, and one end thereof is hermetically inserted into the valve chamber 76 in a direction perpendicular to the valve seat 80. At the other end of the valve body 82 facing the spring chamber 86, there is a flange portion 85 having a pressure receiving surface 84 with a relatively large pressure receiving area.
is formed. On the outer periphery of this part 85, inside the spring chamber 86 is J! An O-ring 87 is provided that slides into contact with. Spring chamber 8
A spring 88 that surrounds the valve body 82 is housed in the inside of the valve body 6 , and the spring force of this spring 88 causes the valve body 82 to move against the valve seat 8 .
It is biased in a direction away from 0. A pressure chamber 89 formed by the pressure receiving surface 84 of the 11 portion 85 and the end inner wall of the spring chamber 86 is communicated with the connection port 91 via a flow path 90 . The air supply pipe 7a is fitted into the connection port 91 via an O-ring 92, and is fixedly connected to the cap 250 by a cap nut 93.

容器弁４′Ｉｔ開弁して圧力容器２内の圧縮空％を連結
手段６を経て、減圧器５内に導いたときを想定する。流
路７２から透孔７７を経て弁室７６内に流入した空気は
、流路８３から圧力室８９および流路９０を経て給気管
７ａに導かれる０それによって、圧力室８９の圧力が上
昇すると、弁体８２はばね８８のばね力に抗して弁座８
０に近接す□る方向に変位され、圧力室８９内の圧力が
７〜８ｋｇ／ｃｍ程度のとき弁体８２の一端部は弁座８
０に当接して気密を保つ。吸ｉにより、空気が放出され
圧力室８９内の圧力が低下すると、弁体８２はばね８２
により弁座８０から遠ざかる方向に変位され、弁座８０
と弁体Ｂ２の一端部とは間隙９４が生じ、弁室７６内の
高圧空気が減圧されて流路８３へ流入してくる。Let us assume that the container valve 4'It is opened and the compressed air in the pressure vessel 2 is introduced into the pressure reducer 5 through the connecting means 6. Air flowing into the valve chamber 76 from the flow path 72 through the through hole 77 is guided from the flow path 83 through the pressure chamber 89 and the flow path 90 to the air supply pipe 7a.As a result, the pressure in the pressure chamber 89 increases. , the valve body 82 resists the spring force of the spring 88 and the valve seat 8
When the pressure inside the pressure chamber 89 is approximately 7 to 8 kg/cm, one end of the valve body 82 is displaced toward the valve seat 8.
0 to maintain airtightness. When air is released due to suction i and the pressure inside the pressure chamber 89 decreases, the valve body 82 is moved by the spring 82.
The valve seat 80 is displaced in the direction away from the valve seat 80 by
A gap 94 is formed between the valve body B2 and one end of the valve body B2, and the high pressure air in the valve chamber 76 is reduced in pressure and flows into the flow path 83.

第５図を参照して、嵌合凹部７８におけるＯ　ＩＪング
８１がなんらかの原因によって故障した場合を想定する
。この０１Ｊング８１がシール機能を果さなくなると、
弁室７６内の高圧力が、嵌合体７９と嵌合凹部７８との
間の間隙を経て、嵌合体７９の弁座８０とは反対側の端
面に作用するようになる。減圧器５の減圧作用時におい
て、弁座８０の流路８３に対応する中央部には減圧後の
比較的低い圧力が作用し、その中央部を除く残余の部分
には弁室７６内の高圧力が作用している。そのため嵌合
体７９の弁座８０と反対側の端面に高圧力が作用すると
、弁座８０の中央部は仮想線で示すごとく、弁体８２に
近接する方向に突出されてしまい、減圧機能が果せなく
なる。Referring to FIG. 5, it is assumed that the O IJ ring 81 in the fitting recess 78 breaks down for some reason. If this 01J 81 no longer performs its sealing function,
The high pressure within the valve chamber 76 passes through the gap between the fitting body 79 and the fitting recess 78 and acts on the end surface of the fitting body 79 on the opposite side from the valve seat 80. During the pressure reduction operation of the pressure reducer 5, a relatively low pressure after pressure reduction acts on the central portion of the valve seat 80 corresponding to the flow path 83, and the high pressure inside the valve chamber 76 acts on the remaining portion excluding the central portion. Pressure is at work. Therefore, when high pressure is applied to the end surface of the fitting body 79 opposite to the valve seat 80, the central portion of the valve seat 80 is projected in the direction approaching the valve body 82, as shown by the imaginary line, and the pressure reducing function is not achieved. I won't be able to do it.

そこで、押え部材７５には、嵌合凹部７８の底部に一端
部が連通し、かつ他端部が大ｆｉに連通ずる逃し孔９５
が形成される。この逃し孔９５を設けることによって、
九とえＯリング８１が故障してシール機能が果されず、
弁室７６内の高圧力の空気が嵌合体７９の弁座８０と反
対側の端面と嵌合凹部７８との闇に侵入したとしても、
その高圧力の空気は大ＩｊＬに逃される。そのため弁座
８０の中央部分が前述のごとくふくらむことは防止され
る。またこの逃し孔９５は、嵌合体７９を嵌合凹部７８
に嵌入するときに空気を逃す作用をするので、嵌入操作
が容易になる。さらに嵌合体７９を収りかえる際に、逃
し孔９５に適当な棒部材を嵌入し、嵌合体７９１に裏側
から押圧することによって、嵌合体７９を嵌合凹部７８
から容易に収り出すことができる。Therefore, the presser member 75 has a relief hole 95 whose one end communicates with the bottom of the fitting recess 78 and whose other end communicates with the large fi.
is formed. By providing this relief hole 95,
Nine O-rings 81 are broken and the sealing function is not fulfilled.
Even if the high-pressure air in the valve chamber 76 invades the space between the end surface of the fitting body 79 opposite to the valve seat 80 and the fitting recess 78,
The high pressure air is released to the large IjL. Therefore, the central portion of the valve seat 80 is prevented from bulging as described above. Moreover, this escape hole 95 allows the fitting body 79 to fit into the fitting recess 78.
Since it acts to release air when it is inserted, the insertion operation becomes easier. Furthermore, when replacing the fitting body 79, a suitable rod member is inserted into the relief hole 95 and pressed against the fitting body 791 from the back side, so that the fitting body 79 is inserted into the fitting recess 78.
It can be easily extracted from.

流路９０の途中には、安全弁１１０が設けられる。A safety valve 110 is provided in the middle of the flow path 90.

流路８３の弁座８０Ｖｃ近接した内壁には、凹凸１０３
が形成される。この凹凸１０３Ｖ′ｉ、たとえばこの実
施例ではねじであってＭ３．５ピッチ０．６ｍｍ　、　
弁体８２の軸線方向に沿う長さｌ　＝　５　ｍｍであり
、ねじ山の内径ｄ　１　＝　３．２ｍｍ−であり、弁体
８２の外径ｄ　２　＝　４．６　ｍｍ−とされ、弁体８
２の遊端部８２ａｔｉ軸線方向内方（第５図の上方）に
内窄まりの４５°の円錐面を吠す。本件発明者によれば
、このような凹凸１０３が形成されていないときには、
装着者が耳で充分聞こえる程度の「ピー」という音が発
生したけれども、凹凸１０３を形ｉｆることによってこ
の音の発生がなくなったことが確認された。The inner wall adjacent to the valve seat 80Vc of the flow path 83 has an unevenness 103.
is formed. This unevenness 103V'i is, for example, a screw in this embodiment with an M3.5 pitch of 0.6 mm,
The length l along the axial direction of the valve body 82 is 5 mm, the inner diameter d1 of the thread is 3.2 mm-, the outer diameter d2 of the valve body 82 is 4.6 mm-, and the valve body 8
A 45° conical surface with an inner convergence is formed inward in the axial direction (upper side in FIG. 5) at the free end 82ati of the two. According to the inventor of the present invention, when such unevenness 103 is not formed,
Although a ``bleep'' sound was generated that the wearer could clearly hear, it was confirmed that by shaping the unevenness 103, the generation of this sound was eliminated.

凹凸１０３は、前述の実施例ではねじとされたけれども
、本発明の雌の実施例として、その池の構造を有する凹
凸であってもよく、弁室７６から流路８３に流れる気体
が渦を生じて音を発生しないように構成さ７′Ｌ、ｔ′
Ｌばよい。Although the unevenness 103 is a screw in the above-mentioned embodiment, in a female embodiment of the present invention, it may be an unevenness having a pond structure, so that the gas flowing from the valve chamber 76 to the flow path 83 creates a vortex. 7'L, t'
L good.

本発明は、呼吸器に関連する減圧弁だけでなく、その他
の減圧弁に広範囲に実施されることができる。The present invention can be broadly implemented not only in pressure reducing valves related to respiratory equipment, but also in other pressure reducing valves.

以Ｅのように本発明によれば、弁体８２を弁座８０から
遠ざかる方向にばね８８によりて付勢し、弁体８２に形
成された流路８３を介する気体圧によって、弁体８２が
ばね８８のばね力に抗して弁座８０の近接方向に変位さ
れるよう［した減圧弁において、流路８３の弁座８０Ｖ
ｃ近接した内壁には凹凸を形成したので減圧時において
不所望な音の発生を防ぐことができるようになった。As described above, according to the present invention, the valve body 82 is biased by the spring 88 in the direction away from the valve seat 80, and the valve body 82 is pushed by the gas pressure through the flow path 83 formed in the valve body 82. In a pressure reducing valve that is configured to be displaced toward the valve seat 80 against the spring force of the spring 88, the valve seat 80V of the flow path 83
(c) Since the adjacent inner wall has irregularities, it is possible to prevent the generation of undesirable sounds when the pressure is reduced.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例の全体の正面図、第２図は開
放式呼１！！ｊ器１の簡略化した系統図、第３図はＭ圧
器５の平面図、　　　　　　　　　　　−一千第４図は
減圧器５の縦断面図、第５図は弁体８２の弁座８０に近
接した部分付近の拡大断面図である。 ｌ・・・開放式ｇ＋火器、２・・・圧力容器、３・・・
装着手段、４・・・容器弁、５・・・減圧器、８０・・
・弁座、８２・・・弁体、８３・・・流路、８８・・・
ばね、１０３・・・凹凸代理人　　　弁理士　四教圭一
部 第５図 ８３８２ ８１７５７９９５７８　　７１FIG. 1 is an overall front view of one embodiment of the present invention, and FIG. 2 is an open type call 1! ! 3 is a plan view of the M pressure device 5, -1,000 FIG. FIG. 3 is an enlarged cross-sectional view of the vicinity of the portion. l...open type g+firearm, 2...pressure vessel, 3...
Mounting means, 4... Container valve, 5... Pressure reducer, 80...
・Valve seat, 82... Valve body, 83... Channel, 88...
Spring, 103...Uneven Agent Patent Attorney Shikyo Kei Part No. 5 8382 8175799578 71

Claims (1)

【特許請求の範囲】 弁体８２を弁座８９から遠ざかる方向にばね８８によっ
て付勢し、弁体８２に形成され交流路８３を介する気体
圧によって弁体８２がばね８８のばね力に抗して弁座８
０の近接方向に変位されるようにした減圧弁において、 流路８３の弁座８０に近接した内壁に凹凸を形成したこ
とを特徴とする減圧弁。[Claims] The valve body 82 is biased by a spring 88 in a direction away from the valve seat 89, and the valve body 82 resists the spring force of the spring 88 by gas pressure formed in the valve body 82 and passed through an AC passage 83. Valve seat 8
1. A pressure reducing valve configured to be displaced in a direction approaching zero, characterized in that an inner wall of a flow path 83 near a valve seat 80 is formed with unevenness.