JP5431009B2 - Pressure reducing valve - Google Patents

Pressure reducing valve Download PDF

Info

Publication number
JP5431009B2
JP5431009B2 JP2009106710A JP2009106710A JP5431009B2 JP 5431009 B2 JP5431009 B2 JP 5431009B2 JP 2009106710 A JP2009106710 A JP 2009106710A JP 2009106710 A JP2009106710 A JP 2009106710A JP 5431009 B2 JP5431009 B2 JP 5431009B2
Authority
JP
Japan
Prior art keywords
valve
primary chamber
pressure
movable
chamber
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.)
Active
Application number
JP2009106710A
Other languages
Japanese (ja)
Other versions
JP2010257235A (en
Inventor
清隆 宮田
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.)
Time Engineering Co Ltd
Original Assignee
Time Engineering Co 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 Time Engineering Co Ltd filed Critical Time Engineering Co Ltd
Priority to JP2009106710A priority Critical patent/JP5431009B2/en
Publication of JP2010257235A publication Critical patent/JP2010257235A/en
Application granted granted Critical
Publication of JP5431009B2 publication Critical patent/JP5431009B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/04—Control of fluid pressure without auxiliary power
    • G05D16/06—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule
    • G05D16/063—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane
    • G05D16/0644—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator
    • G05D16/0655—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator using one spring-loaded membrane

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Safety Valves (AREA)
  • Control Of Fluid Pressure (AREA)

Description

本発明は、減圧弁に関するものである。   The present invention relates to a pressure reducing valve.

特許文献１には、一次室と、弁口を介して一次室と連通可能な二次室と、二次室の圧力に応じて弁口の開度を変化させるように移動可能な弁体とを備え、一次室を構成するバルブ構成部材が合成樹脂製である減圧弁が開示されている。この減圧弁では、バルブ構成部材が、金属に比べて強度の低い合成樹脂製である点に鑑み、一次室の圧力が高くなった場合に、一次室の流体を排出して一次室内の圧力を下げるためのリリーフ弁（第２弁機構）が設けられている。   Patent Document 1 discloses a primary chamber, a secondary chamber that can communicate with the primary chamber via a valve port, and a valve body that can move so as to change the opening of the valve port according to the pressure of the secondary chamber. There is disclosed a pressure reducing valve in which a valve constituent member constituting the primary chamber is made of synthetic resin. In this pressure reducing valve, in view of the fact that the valve component is made of a synthetic resin having a lower strength than metal, when the pressure in the primary chamber increases, the fluid in the primary chamber is discharged to reduce the pressure in the primary chamber. A relief valve (second valve mechanism) for lowering is provided.

特開２００８−１８６１０６号公報JP 2008-186106 A

リリーフ弁は、バルブ構成部材のうち一次室と二次室とを区画する隔壁に設けられており、一次室内の流体がリリーフ弁を通って二次室側へ流出するようになっている。そのため、バルブ構成部材の隔壁には、リリーフ弁を設けるための開口部を貫通させなければならず、貫通部を形成することが原因となってバルブ構成部材の強度低下を来すことが懸念される。   The relief valve is provided in a partition wall that partitions the primary chamber and the secondary chamber among the valve components, and fluid in the primary chamber flows out to the secondary chamber side through the relief valve. Therefore, the partition wall of the valve component member must pass through an opening for providing a relief valve, and there is a concern that the strength of the valve component member may be reduced due to the formation of the through portion. The

本発明は上記のような事情に基づいて完成されたものであって、一次室を構成するバルブ構成部材の強度低下を来すことなく、一次室を減圧することのできる減圧弁を提供することを目的とする。   The present invention has been completed based on the above circumstances, and provides a pressure reducing valve capable of decompressing a primary chamber without causing a decrease in strength of a valve constituent member constituting the primary chamber. With the goal.

上記の目的を達成するための手段として、請求項１の発明は、一次室と、弁口を介して前記一次室と連通可能な二次室と、前記弁口の開度を変化させるように移動可能な弁体とを備え、前記一次室を構成するバルブ構成部材が合成樹脂製とされており、前記弁体が前記弁口を閉塞する閉弁状態において、前記一次室内の圧力が前記バルブ構成部材の耐圧を超えない範囲内で上昇したときには、前記一次室内の流体が前記弁体を貫通する連通路を通って前記二次室側へ流出することを許容するが、常には前記連通路を閉止状態に保持するリリーフ弁を備えた減圧弁であって、前記弁体は、前記二次室側から前記弁口の開口縁に当接可能なリング状の当接部材と、前記一次室内に臨む受圧体と一体的に移動可能であり、前記当接部材に対し貫通状態で相対移動可能に設けられた可動体とを備え、前記可動体の外周と前記当接部材の内周との隙間が前記連通路として機能し得るようになっており、前記可動体には、前記一次室側から前記連通路の開口を閉塞可能であって、前記一次室に臨む受圧面積が前記受圧体よりも小さい閉止部が形成されており、前記可動体と前記当接部材との間には、前記閉止部に対し前記連通路の開口を閉止する方向への付勢力を付与するバネ部材が設けられているところに特徴を有する。 As a means for achieving the above object, the invention of claim 1 is to change the opening degree of the primary chamber, the secondary chamber that can communicate with the primary chamber via the valve port, and the opening of the valve port. and a movable valve body, the valve components constituting the primary chamber are made of a synthetic resin, in a closed state where the valve body closes the valve port, the pressure of the primary chamber the valve When the pressure rises within a range that does not exceed the pressure resistance of the constituent member, the fluid in the primary chamber is allowed to flow out to the secondary chamber side through the communication passage that penetrates the valve body. A pressure reducing valve having a relief valve that holds the valve in a closed state , wherein the valve body includes a ring-shaped contact member that can contact the opening edge of the valve port from the secondary chamber side, and the primary chamber Is movable integrally with the pressure receiving body facing the surface, and penetrates the contact member. And a movable body provided so as to be relatively movable, and a gap between the outer periphery of the movable body and the inner periphery of the contact member can function as the communication path. An opening of the communication passage can be closed from the primary chamber side, and a closing portion having a pressure receiving area facing the primary chamber smaller than that of the pressure receiving body is formed, and between the movable body and the contact member Is characterized in that a spring member is provided for applying a biasing force in a direction to close the opening of the communication path to the closing portion .

＜請求項１の発明＞
弁体が弁口を閉塞する閉弁状態において一次室内の圧力が上昇した場合には、その一次室内の圧力がバルブ構成部材の耐圧を超えないうちに、一次室内の流体が弁体を貫通する連通路を通って二次室側へ流出して一次室内が減圧されるので、バルブ構成部材が破損する虞はない。リリーフ弁において流体の流路となる連通路は、バルブ構成部材を貫通するのではなく、弁体を貫通する形態となっているので、リリーフ弁を設けたことが原因となってバルブ構成部材の強度が低下する虞はない。
また、一次室に臨む受圧面積は閉止部よりも受圧体の方が大きいので、一次室内の圧力が上昇すると、可動体と受圧体はバネ部材の付勢に抗して受圧体側へ移動する。この移動の方向は、閉止部が連通路の一次室側の開口から離れる方向なので、連通路を介して一次室と二次室とが連通し、リリーフ弁が開弁状態となる。 <Invention of Claim 1>
When the pressure in the primary chamber rises while the valve body closes the valve port, the fluid in the primary chamber penetrates the valve body before the pressure in the primary chamber exceeds the pressure resistance of the valve component. Since it flows out to the secondary chamber side through the communication passage and the primary chamber is depressurized, there is no possibility that the valve component is damaged. The communication path that is a fluid flow path in the relief valve is not penetrating the valve component member, but penetrates the valve body. There is no risk of a decrease in strength.
Further, since the pressure receiving area facing the primary chamber is larger in the pressure receiving body than in the closing portion, when the pressure in the primary chamber rises, the movable body and the pressure receiving body move toward the pressure receiving body against the bias of the spring member. The direction of this movement is the direction in which the closing portion is away from the opening on the primary chamber side of the communication passage, so that the primary chamber and the secondary chamber communicate with each other through the communication passage, and the relief valve is opened.

実施形態１の減圧弁とリリーフ弁が閉弁している状態をあらわす断面図Sectional drawing showing the state which the pressure reducing valve and relief valve of Embodiment 1 are closing 減圧弁が開弁し、リリーフ弁が閉弁している状態をあらわす部分拡大断面図Partial enlarged sectional view showing the state where the pressure reducing valve is open and the relief valve is closed 図１の部分拡大断面図Partial enlarged sectional view of FIG. 減圧弁が閉弁し、リリーフ弁が開弁している状態をあらわす部分拡大断面図Partial enlarged sectional view showing the state where the pressure reducing valve is closed and the relief valve is open

＜実施形態１＞
以下、本発明を具体化した実施形態１を図１乃至図４を参照して説明する。本実施形態の減圧弁は、バルブ構成部材１０と、可動部材２０と、ダイヤフラム３６と、付勢バネ３７とを備えている。バルブ構成部材１０は、合成樹脂製であって、バルブ構成部材１０の内部には、流体の流路である一次室１１と二次室１２とが形成されている。バルブ構成部材１０には、その側面に開口するとともに一次室１１に連通する流入口１３と、流入口１３とは反対側の側面に開口するとともに二次室１２に連通する流出口１４と、一次室１１に連通するとともに上面側に開口するガイド筒部１５と、ガイド筒部１５の下方に配されて一次室１１と二次室１２とを上下に連通させる弁口１６とが形成されている。 <Embodiment 1>
A first embodiment of the present invention will be described below with reference to FIGS. The pressure reducing valve of this embodiment includes a valve component member 10, a movable member 20, a diaphragm 36, and a biasing spring 37. The valve component 10 is made of synthetic resin, and a primary chamber 11 and a secondary chamber 12 that are fluid flow paths are formed inside the valve component 10. The valve component 10 has an inlet 13 that opens to its side and communicates with the primary chamber 11, an outlet 14 that opens to the side opposite to the inlet 13 and communicates with the secondary chamber 12, and a primary A guide tube portion 15 that communicates with the chamber 11 and opens to the upper surface side, and a valve port 16 that is disposed below the guide tube portion 15 and communicates the primary chamber 11 and the secondary chamber 12 up and down are formed. .

弁口１６の上方は一次室１１となっており、弁口１６の下方は二次室１２となっている。弁口１６の二次室１２側（下側）の開口縁は、弁シート１７となっている。バルブ構成部材１０の上面は、二次室１２に連通しているとともにバルブ構成部材１０の外へ大きく開口した形態であり、この開口部はダイヤフラム３６で閉塞されている。二次室１２のうちダイヤフラム３６の下面に臨む空間は、受圧室１８となっている。また、ダイヤフラム３６は、付勢バネ３７によって下方（後述する弁体２７を弁シート１７から離間させて減圧弁を開弁させる方向）へ付勢されている。また、ダイヤフラム３６が下方へ変位すると、二次室１２の容積が減少する。   Above the valve port 16 is a primary chamber 11, and below the valve port 16 is a secondary chamber 12. An opening edge on the secondary chamber 12 side (lower side) of the valve port 16 is a valve seat 17. The upper surface of the valve constituent member 10 communicates with the secondary chamber 12 and has a large opening to the outside of the valve constituent member 10, and the opening is closed with a diaphragm 36. A space facing the lower surface of the diaphragm 36 in the secondary chamber 12 is a pressure receiving chamber 18. The diaphragm 36 is urged downward by a biasing spring 37 (a direction in which a later-described valve body 27 is separated from the valve seat 17 and the pressure reducing valve is opened). Further, when the diaphragm 36 is displaced downward, the volume of the secondary chamber 12 is reduced.

可動部材２０は、ガイド筒部１５内に液密状に嵌合されて上下方向に移動可能な受圧体２１と、受圧体２１の上面からガイド筒部１５よりも上方へ延出してダイヤフラム３６に固着された連結部２２と、受圧体２１の下面からガイド筒部１５よりも下方へ延出した弁棒２３と、弁棒２３の下端に連なる可動体２４とを一体形成したものである。かかる可動部材２０は、ガイド筒部１５に案内されることにより上下方向に移動し得るようになっている。受圧体２１の下面は、一次室１１に臨む受圧面となっている。   The movable member 20 is fitted in the guide tube portion 15 in a liquid-tight manner and is movable in the vertical direction. The movable member 20 extends from the upper surface of the pressure receiver 21 to the diaphragm 36 by extending upward from the guide tube portion 15. The fixed connecting portion 22, the valve rod 23 extending below the guide tube portion 15 from the lower surface of the pressure receiving body 21, and the movable body 24 connected to the lower end of the valve rod 23 are integrally formed. The movable member 20 can move in the vertical direction by being guided by the guide tube portion 15. The lower surface of the pressure receiving body 21 is a pressure receiving surface that faces the primary chamber 11.

可動体２４は、弁棒２３の下端に連なる閉止部２５と、閉止部２５の下面から下方へ突出する貫通部２６とからなる。閉止部２５は、弁棒２３と同心であって上から下に向かって次第に拡径する円錐状をなしている。貫通部２６は、弁棒２３及び閉止部２５と同心であって、外径が閉止部２５の最大外径よりも小さい円柱状をなしている。閉止部２５のテーパ状をなす上面は、一次室１１に臨む受圧面となっている。   The movable body 24 includes a closing portion 25 that is continuous with the lower end of the valve rod 23, and a through portion 26 that protrudes downward from the lower surface of the closing portion 25. The closing portion 25 is concentric with the valve stem 23 and has a conical shape that gradually increases in diameter from top to bottom. The penetrating portion 26 is concentric with the valve stem 23 and the closing portion 25 and has a cylindrical shape whose outer diameter is smaller than the maximum outer diameter of the closing portion 25. The tapered upper surface of the closing portion 25 is a pressure receiving surface that faces the primary chamber 11.

可動体２４は、当接部材２８とともに弁体２７を構成する。当接部材２８は、ゴム等の弾性部材からなり、可動体２４と同心の円環形をなす。当接部材２８の上面は、弁シート１７に対し、二次室１２側（下側）から液密状に当接し得るようになっている。当接部材２８の中心孔２９の内径は、可動体２４の貫通部２６の外径りも少し大きく、閉止部２５の最大外径よりも小さい。中心孔２９には貫通部２６が貫通されており、中心孔２９の内周と貫通部２６の外周との隙間は、一次室１１と二次室１２とを連通させるための連通路３０となっている。   The movable body 24 constitutes a valve body 27 together with the contact member 28. The contact member 28 is made of an elastic member such as rubber and has an annular shape concentric with the movable body 24. The upper surface of the contact member 28 can come into contact with the valve seat 17 in a liquid-tight manner from the secondary chamber 12 side (lower side). The inner diameter of the center hole 29 of the contact member 28 is slightly larger than the outer diameter of the penetrating portion 26 of the movable body 24 and smaller than the maximum outer diameter of the closing portion 25. A through hole 26 is penetrated through the center hole 29, and a gap between the inner periphery of the center hole 29 and the outer periphery of the through part 26 serves as a communication path 30 for communicating the primary chamber 11 and the secondary chamber 12. ing.

貫通部２６における当接部材２８よりも下方の領域には、円環形の第１バネ受け部材３１が取り付けられているとともに、第１バネ受け部材３１よりも下方に位置する円環形の第２バネ受け部材３２が取り付けられている。そして、貫通部２６の下端部にはナット３３が螺合され、ナット３３の上面に第２バネ受け部材３２が当接されている。第１バネ受け部材３１は、当接部材２８に対しその下面と外周面とを覆うようにして嵌合されている。そして、第１バネ受け部材３１の下面と第２バネ受け部材３２の上面との間には、ウェーブワッシャからなる円環形のバネ部材３４が装着されている。   An annular first spring receiving member 31 is attached to a region of the penetrating portion 26 below the contact member 28, and an annular second spring positioned below the first spring receiving member 31. A receiving member 32 is attached. A nut 33 is screwed to the lower end portion of the penetrating portion 26, and the second spring receiving member 32 is in contact with the upper surface of the nut 33. The first spring receiving member 31 is fitted to the contact member 28 so as to cover the lower surface and the outer peripheral surface thereof. An annular spring member 34 composed of a wave washer is mounted between the lower surface of the first spring receiving member 31 and the upper surface of the second spring receiving member 32.

上記の可動部材２０、当接部材２８、連通路３０及びバネ部材３４は、リリーフ弁３５を構成する。リリーフ弁３５は、常には、バネ部材３４の付勢により閉弁状態に保たれている（図１〜図３を参照）。即ち、バネ部材３４は、両バネ受け部材３１，３２に対しその上下間隔を広げる方向の付勢力を付与し、換言すると、可動体２４が当接部材２８に対して相対的に下方へ移動する方向へ付勢する手段として機能する。そして、バネ部材３４の付勢により、閉止部２５が当接部材２８の上面に当接して連通路３０の上面側（一次室１１に臨む側）の開口を液密状に閉塞するのである。   The movable member 20, the contact member 28, the communication path 30, and the spring member 34 constitute a relief valve 35. The relief valve 35 is always kept in a closed state by the biasing of the spring member 34 (see FIGS. 1 to 3). That is, the spring member 34 applies an urging force in the direction of increasing the vertical distance to the spring receiving members 31 and 32, in other words, the movable body 24 moves relatively downward with respect to the contact member 28. It functions as a means for biasing in the direction. Then, due to the urging of the spring member 34, the closing portion 25 abuts against the upper surface of the abutting member 28, and the opening on the upper surface side (side facing the primary chamber 11) of the communication passage 30 is closed in a liquid-tight manner.

リリーフ弁３５が閉弁し、当接部材２８が弁シート１７の当接して減圧弁が閉弁している状態（図１及び図３を参照）では、弁体２７の上面のうち一次室１１に臨む領域（閉止部２５の上面全体と当接部材２８の上面の一部）は、受圧面となっている。この弁体２７の受圧面積は、上記した受圧体２１の受圧面積よりも小さい。したがって、閉止部２５の受圧面積も、受圧体２１の受圧面積より小さい面積となっている。   In a state where the relief valve 35 is closed and the contact member 28 is in contact with the valve seat 17 and the pressure reducing valve is closed (see FIGS. 1 and 3), the primary chamber 11 on the upper surface of the valve body 27. A region (the entire upper surface of the closing portion 25 and a part of the upper surface of the abutting member 28) facing the surface is a pressure receiving surface. The pressure receiving area of the valve body 27 is smaller than the pressure receiving area of the pressure receiving body 21 described above. Therefore, the pressure receiving area of the closing portion 25 is also smaller than the pressure receiving area of the pressure receiving body 21.

次に、本実施形態の作用効果を説明する。流出口１４には、下流側流路（図示省略）を介して図示しない機器（例えば、給湯器の吐水装置）が接続されているが、この機器が閉鎖され、下流側流路における流体（例えば、水やお湯）の流動が停止しているときには、減圧弁は閉弁状態に保たれている。付勢バネ３７は、ダイヤフラム３６に対して減圧弁を開弁させる方向に付勢し、二次室１２の圧力は、弁体２７とダイヤフラム３６に対して減圧弁を閉弁させる方向の付勢力として作用する。ここで、付勢バネ３７の弾力は、下流側流路の流れが停止しているときに、閉弁方向の付勢力よりも小さくなるように設定されているので、減圧弁は閉弁状態に保たれるのである。   Next, the effect of this embodiment is demonstrated. A device (not shown) (for example, a water discharge device for a water heater) is connected to the outflow port 14 via a downstream channel (not shown), but this device is closed and fluid (for example, When the flow of water or hot water is stopped, the pressure reducing valve is kept closed. The urging spring 37 urges the diaphragm 36 in the direction to open the pressure reducing valve, and the pressure in the secondary chamber 12 causes the urging force in the direction to close the pressure reducing valve to the valve body 27 and the diaphragm 36. Acts as Here, the elastic force of the urging spring 37 is set so as to be smaller than the urging force in the valve closing direction when the flow in the downstream channel is stopped, so that the pressure reducing valve is in the valve closed state. It is kept.

また、このときに一次室１１内の圧力が正常の範囲内であれば、リリーフ弁３５も閉弁状態に保たれる（図１及び図３を参照）。可動部材２０には、受圧体２１と閉止部２５の受圧面積の差違に起因する上向きの力と、バネ部材３４により当接部材２８に対して相対的に下向きの力とが作用している。ここで、バネ部材３４の付勢力は、一次室１１の圧力が正常であるときの受圧面積の差違に起因する上向きの力よりも大きくなるように設定されているので、リリーフ弁３５は閉弁状態に保持されるのである。   At this time, if the pressure in the primary chamber 11 is within a normal range, the relief valve 35 is also kept closed (see FIGS. 1 and 3). An upward force resulting from a difference in pressure receiving area between the pressure receiving body 21 and the closing portion 25 and a downward force relative to the contact member 28 by the spring member 34 are applied to the movable member 20. Here, since the biasing force of the spring member 34 is set to be larger than the upward force caused by the difference in pressure receiving area when the pressure in the primary chamber 11 is normal, the relief valve 35 is closed. It is held in a state.

さて、機器の流路が開放されて下流側流路に流体が流れ、二次室１２内の圧力が低下すると、二次室１２側からダイヤフラム３６と弁体２７に作用する閉弁方向の付勢力が弱まるので、ダイヤフラム３６とともに弁体２７が下方へ移動して弁シート１７から離間し、減圧弁が開弁される（図２を参照）。これに伴い、一次室１１内の流体が弁口１６を通って二次室１２側へ流れる。   When the flow path of the device is opened and fluid flows into the downstream flow path, and the pressure in the secondary chamber 12 decreases, the valve closing direction applied to the diaphragm 36 and the valve element 27 from the secondary chamber 12 side is increased. Since the force is weakened, the valve element 27 moves downward together with the diaphragm 36 and is separated from the valve seat 17 and the pressure reducing valve is opened (see FIG. 2). Along with this, the fluid in the primary chamber 11 flows through the valve port 16 to the secondary chamber 12 side.

減圧弁が開弁している状態において、何らかの原因で二次室１２の圧力が上昇すると、ダイヤフラム３６とともに弁体２７が上方へ移動するので、弁口１６の開度が小さくなる。すると、流体が弁口１６を通過する際の圧力損失が増大するので、二次室１２の圧力が下降する。このような減圧弁の作用により、二次室１２側の圧力は所定値以下に維持される。尚、減圧弁が開弁している間は、当接部材２８は、弁シート１７から離間していて可動体２４と一緒に上下動し得る状態に保たれているので、リリーフ弁３５は、バネ部材３４の付勢により閉弁状態に保持される。   When the pressure in the secondary chamber 12 rises for some reason while the pressure reducing valve is open, the valve element 27 moves upward together with the diaphragm 36, so that the opening degree of the valve port 16 is reduced. Then, since the pressure loss when the fluid passes through the valve port 16 increases, the pressure in the secondary chamber 12 decreases. By such an action of the pressure reducing valve, the pressure on the secondary chamber 12 side is maintained below a predetermined value. Since the contact member 28 is kept away from the valve seat 17 and can move up and down together with the movable body 24 while the pressure reducing valve is open, the relief valve 35 is The valve member is held in a closed state by the bias of the spring member 34.

機器が流路を開放している状態から閉鎖する状態に切り替わると、減圧弁（一次室１１及び二次室１２）内における流体の流動が停止し、二次室１２内の圧力が上昇する。すると、この二次室１２内の圧力によりダイヤフラム３６が上昇し、ダイヤフラム３６と一体となって弁体２７が上昇するので、当接部材２８が弁シート１７に当接し、減圧弁が開弁状態から閉弁状態に切り替わる。   When the device is switched from the state in which the flow path is opened to the state in which it is closed, the flow of fluid in the pressure reducing valve (primary chamber 11 and secondary chamber 12) stops, and the pressure in the secondary chamber 12 increases. Then, the diaphragm 36 is raised by the pressure in the secondary chamber 12, and the valve body 27 is raised integrally with the diaphragm 36. Therefore, the contact member 28 comes into contact with the valve seat 17, and the pressure reducing valve is opened. Switches to a closed state.

減圧弁が閉弁している状態において、ウォーターハンマーや、減圧弁よりも上流側の水道配管（図示省略）の凍結等により、一次室１１の圧力が正常範囲を超えて上昇すると、受圧体２１の受圧面積と閉止部２５の受圧面積の差違に起因して可動部材２０に作用する上向きの力が増大する。一方、当接部材２８は、下から弁シート１７に当接しているので、上方へ移動することはできない。したがって、可動部材２０に付与される上向きの力がバネ部材３４の付勢力を上回ると、図４に示すように、可動部材２０が当接部材２８に対して相対的に上方へ移動し、閉止部２５が当接部材２８の上面から離間する。   When the pressure in the primary chamber 11 rises beyond the normal range due to water hammer or freezing of water pipes (not shown) upstream of the pressure reducing valve while the pressure reducing valve is closed, the pressure receiving body 21 The upward force acting on the movable member 20 is increased due to the difference between the pressure receiving area of the moving member 20 and the pressure receiving area of the closing portion 25. On the other hand, since the contact member 28 is in contact with the valve seat 17 from below, it cannot move upward. Therefore, when the upward force applied to the movable member 20 exceeds the biasing force of the spring member 34, the movable member 20 moves relatively upward with respect to the contact member 28 as shown in FIG. The portion 25 is separated from the upper surface of the contact member 28.

これにより、連通路３０の上面側（一次室１１側）の開口が開放され、リリーフ弁３５が閉弁状態から開弁状態へ切り替わる。このときの一次室１１の圧力は、合成樹脂製のバルブ構成部材１０の耐圧を超えない値である。リリーフ弁３５が開弁すると、一次室１１内の流体が連通路３０を通過して二次室１２内に流出するので、一次室１１内の圧力が低下する。そして、一次室１１内の圧力が正常範囲値まで低下すると、バネ部材３４の付勢により可動部材２０が下降して閉止部２５が連通路３０の開口を塞ぐので、リリーフ弁３５が閉弁状態に切り替わる。   As a result, the opening on the upper surface side (primary chamber 11 side) of the communication passage 30 is opened, and the relief valve 35 is switched from the closed state to the open state. At this time, the pressure in the primary chamber 11 is a value that does not exceed the pressure resistance of the valve component 10 made of synthetic resin. When the relief valve 35 is opened, the fluid in the primary chamber 11 passes through the communication passage 30 and flows out into the secondary chamber 12, so that the pressure in the primary chamber 11 decreases. When the pressure in the primary chamber 11 falls to the normal range value, the movable member 20 is lowered by the biasing of the spring member 34 and the closing portion 25 closes the opening of the communication passage 30, so that the relief valve 35 is closed. Switch to

本実施形態においては、弁体２７が弁口１６を閉塞する閉弁状態において一次室１１内の圧力が上昇した場合には、その一次室１１内の圧力がバルブ構成部材１０の耐圧を超えないうちに、一次室１１内の流体が弁体２７を貫通する連通路３０を通って二次室１２側へ流出して一次室１１内が減圧されるので、バルブ構成部材１０が破損する虞はない。   In the present embodiment, when the pressure in the primary chamber 11 rises while the valve element 27 closes the valve port 16, the pressure in the primary chamber 11 does not exceed the pressure resistance of the valve component 10. In the meantime, since the fluid in the primary chamber 11 flows out to the secondary chamber 12 side through the communication passage 30 penetrating the valve body 27 and the pressure in the primary chamber 11 is reduced, there is a possibility that the valve component 10 is damaged. Absent.

本実施形態の減圧弁では、リリーフ弁３５において流体の流路となる連通路３０は、バルブ構成部材１０を貫通するのではなく、弁体２７を貫通する形態となっているので、リリーフ弁３５を設けたことが原因となってバルブ構成部材１０の強度が低下する虞はない。   In the pressure reducing valve according to the present embodiment, the communication passage 30 serving as a fluid flow path in the relief valve 35 does not penetrate the valve constituent member 10 but penetrates the valve body 27. There is no possibility that the strength of the valve constituent member 10 may be reduced due to the provision of.

＜他の実施形態＞
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施態様も本発明の技術的範囲に含まれる。
上記実施形態では、閉止部を閉止方向へ付勢するためのバネ部材としてウェーブワッシャを用いたが、これに限らず、皿ばねをバネ部材として用いてもよい。 <Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
In the above embodiment, the wave washer is used as a spring member for urging the closing portion in the closing direction. However, the present invention is not limited to this, and a disc spring may be used as the spring member.

１０…バルブ構成部材
１１…一次室
１２…二次室
１６…弁口
２１…受圧体
２４…可動体
２５…閉止部
２７…弁体
２８…当接部材
３０…連通路
３４…バネ部材
３５…リリーフ弁 DESCRIPTION OF SYMBOLS 10 ... Valve structural member 11 ... Primary chamber 12 ... Secondary chamber 16 ... Valve port 21 ... Pressure receiving body 24 ... Movable body 25 ... Closure part 27 ... Valve body 28 ... Contact member 30 ... Communication path 34 ... Spring member 35 ... Relief valve

Claims (1)

一次室と、
弁口を介して前記一次室と連通可能な二次室と、
前記弁口の開度を変化させるように移動可能な弁体とを備え、
前記一次室を構成するバルブ構成部材が合成樹脂製とされており、
前記弁体が前記弁口を閉塞する閉弁状態において、前記一次室内の圧力が前記バルブ構成部材の耐圧を超えない範囲内で上昇したときには、前記一次室内の流体が前記弁体を貫通する連通路を通って前記二次室側へ流出することを許容するが、常には前記連通路を閉止状態に保持するリリーフ弁を備えた減圧弁であって、
前記弁体は、
前記二次室側から前記弁口の開口縁に当接可能なリング状の当接部材と、
前記一次室内に臨む受圧体と一体的に移動可能であり、前記当接部材に対し貫通状態で相対移動可能に設けられた可動体とを備え、
前記可動体の外周と前記当接部材の内周との隙間が前記連通路として機能し得るようになっており、
前記可動体には、前記一次室側から前記連通路の開口を閉塞可能であって、前記一次室に臨む受圧面積が前記受圧体よりも小さい閉止部が形成されており、
前記可動体と前記当接部材との間には、前記閉止部に対し前記連通路の開口を閉止する方向への付勢力を付与するバネ部材が設けられていることを特徴とする減圧弁。 The primary room,
A secondary chamber capable of communicating with the primary chamber via a valve port;
A valve body movable so as to change the opening of the valve opening,
The valve constituent member constituting the primary chamber is made of synthetic resin ,
In a closed state where the valve body closes the valve port, when the pressure in the primary chamber rises within a range not exceeding the pressure resistance of the valve component, the fluid in the primary chamber passes through the valve body. A pressure reducing valve having a relief valve that allows the secondary passage to flow out to the secondary chamber side through a passage, but always keeps the communication passage closed ;
The valve body is
A ring-shaped contact member capable of contacting the opening edge of the valve port from the secondary chamber side;
A movable body that is movable integrally with the pressure receiving body facing the primary chamber, and that is movable relative to the contact member in a penetrating state;
A gap between the outer periphery of the movable body and the inner periphery of the contact member can function as the communication path,
In the movable body, an opening of the communication path can be closed from the primary chamber side, and a closed portion having a pressure receiving area facing the primary chamber smaller than that of the pressure receiving body is formed.
A pressure reducing valve provided between the movable body and the contact member is provided with a spring member that applies a biasing force to the closing portion in a direction to close the opening of the communication path .
JP2009106710A 2009-04-24 2009-04-24 Pressure reducing valve Active JP5431009B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009106710A JP5431009B2 (en) 2009-04-24 2009-04-24 Pressure reducing valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009106710A JP5431009B2 (en) 2009-04-24 2009-04-24 Pressure reducing valve

Publications (2)

Publication Number Publication Date
JP2010257235A JP2010257235A (en) 2010-11-11
JP5431009B2 true JP5431009B2 (en) 2014-03-05

Family

ID=43318062

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2009106710A Active JP5431009B2 (en) 2009-04-24 2009-04-24 Pressure reducing valve

Country Status (1)

Country Link
JP (1) JP5431009B2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5551038B2 (en) * 2010-09-28 2014-07-16 イーグル工業株式会社 Valve device
JP2013143106A (en) * 2012-01-12 2013-07-22 Rinnai Corp Pressure reduction valve for water
JP5968660B2 (en) * 2012-03-27 2016-08-10 株式会社不二工機 Pressure reducing valve
JP5911745B2 (en) * 2012-03-27 2016-04-27 株式会社不二工機 Pressure reducing valve
JP6050039B2 (en) * 2012-07-03 2016-12-21 株式会社不二工機 Pressure reducing valve
JP5911836B2 (en) * 2013-09-17 2016-04-27 株式会社不二工機 Pressure reducing valve

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5847910U (en) * 1981-09-28 1983-03-31 株式会社ノーリツ Pressure reducing valve
JP2007333193A (en) * 2006-06-19 2007-12-27 Inax Corp Water supply device
JP4290200B2 (en) * 2007-01-29 2009-07-01 株式会社ダンレイ Pressure reducing valve

Also Published As

Publication number Publication date
JP2010257235A (en) 2010-11-11

Similar Documents

Publication Publication Date Title
JP5431009B2 (en) Pressure reducing valve
JP3151299U (en) Pressure operated control valve
EP2962024B1 (en) Diaphragm valve with dual point seal and floating diaphragm web
JP2018025223A5 (en)
US7921868B2 (en) Airing and venting elements for pipes and fittings
US2228552A (en) Valve for flushing tanks
KR101290283B1 (en) Control valve
WO2004015315A1 (en) Vent valve
JP5215709B2 (en) Water governor
US9605419B2 (en) Piston-type flushometer valve
JP7085359B2 (en) Valve device
US20130082198A1 (en) Flow noise restrictor
US20100133452A1 (en) Fluid level control valve
US20160362878A1 (en) Device for Preventing Backflow
WO2022019956A3 (en) Flushometer system
JP5911836B2 (en) Pressure reducing valve
CN111306305A (en) Built-in valve structure of pre-acting alarm valve seat
JP2819122B2 (en) Pressure release valve
JP5453175B2 (en) Pilot operated solenoid valve
JP4291403B1 (en) Pilot back pressure valve with check function
JP3217724U (en) valve
JP5431035B2 (en) Disc type steam trap
JP5536241B2 (en) Pressure reducing valve
RU69955U1 (en) VALVE CONTROL VALVE
JP2004110179A (en) Pressure reducing valve

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20120322

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20130214

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20130612

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20130618

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20130807

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20130827

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20131112

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20131204

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

Ref document number: 5431009

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250