JP2008185163A - Relief valve - Google Patents

Relief valve Download PDF

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JP2008185163A
JP2008185163A JP2007020265A JP2007020265A JP2008185163A JP 2008185163 A JP2008185163 A JP 2008185163A JP 2007020265 A JP2007020265 A JP 2007020265A JP 2007020265 A JP2007020265 A JP 2007020265A JP 2008185163 A JP2008185163 A JP 2008185163A
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valve
valve body
opening
primary side
flow path
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Homare Iwamoto
誉 岩本
Takashi Nagasaka
隆史 長坂
Masataka Murata
政貴 村田
Toshihiro Nishiyama
利洋 西山
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Yoshitake Inc
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Yoshitake Inc
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Priority to JP2007020265A priority Critical patent/JP2008185163A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To ease impact on a valve body by pulsation and to prevent vibration which occurs in the valve body when opening a valve. <P>SOLUTION: This relief valve comprises: a tapered valve seat 8, which is provided at the secondary side opening end of a valve opening 7 communicating with a primary side flow passage 3 and a secondary side flow passage 5 and keeps the diameter gradually contracted with advancement toward the primary side; an inverted conical portion 15, which is mountable to and removable from the valve seat 8; a valve body 12, on which a flange portion 16 of a circular plate shape is provided outward protrusively and horizontally on the upper end peripheral edge of the inverted conical portion 15; and a spring 22, which energizes the valve body 12 in the valve-closing direction. An inclined portion 15a and the flange portion 16 of the valve body 12 are made to be continuous by a curve C of a gradual arc shape and the primary side of the valve opening 7 is blocked by a bulkhead 9. This bulkhead 9 has a plurality of centripetal side diversion channels 10 corresponding to the position of the lower small end surface 15b of the valve body 12 and a plurality of centrifugal side diversion channels 11 corresponding to the position of the inclined portion 15a of the valve body 12 both formed vertically penetratingly, so that the primary side flow passage 3 communicate with the valve opening 7. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、流体圧力が所定値以上に達した時に作動して圧力を安全且つ確実に逃がすリリーフ弁に関する。   The present invention relates to a relief valve that operates when a fluid pressure reaches a predetermined value or more to release the pressure safely and reliably.

従来、この種のリリーフ弁は、液圧ポンプを備えた配管系において、液圧ポンプの吐出口に連結した給水管から分岐した戻り配管と受水タンクの間に介装され、例えば、特許文献１に開示される様に、一次側流路と二次側流路とを連通する弁口を開閉する弁体がバネにて閉弁方向へ付勢され、弁体の開弁方向に作用する液圧ポンプからの吐出圧が所定値以上に達してバネによる閉弁方向の付勢力を上回った時に開弁する様に構成され、かかる開弁により圧力流体の一部を受水タンクへ還元し、配管系の圧力を制御して液圧ポンプ及び配管その他の機器類の破損を防止する。
特開２００３−１６６６５９号公報 Conventionally, this type of relief valve is interposed between a return pipe branched from a water supply pipe connected to a discharge port of a hydraulic pump and a water receiving tank in a piping system including a hydraulic pump. 1, the valve body that opens and closes the valve port that communicates the primary side flow path and the secondary side flow path is biased by the spring in the valve closing direction, and acts in the valve opening direction of the valve body. It is configured to open when the discharge pressure from the hydraulic pump reaches a predetermined value or more and exceeds the biasing force in the valve closing direction by the spring, and a part of the pressure fluid is returned to the water receiving tank by such valve opening. Control the pressure in the piping system to prevent damage to the hydraulic pump, piping and other equipment.
JP 2003-166659 A

しかしながら、上記のリリーフ弁では、図４に示す様に、弁体ａは上部にフランジｂを設けた断面逆台形状に形成され、そのフランジｂが弁座ｃに着離自在に設けられているだけのため、弁体ａには液圧ポンプから吐出された圧力流体の脈動が直に伝わることになり、閉弁時においても脈動水の衝撃をストレートに受けて弁体ａが弾んで弁座ｃに激しく接触を繰り返す様な不安定な状態を招来している。
又、弁体ａにおいてそのフランジｂは傾斜部ｄの上端周縁から急激に９０度に折れ曲がって水平に突出しているため、開弁時において、弁体ａの傾斜部ｄに沿って流れる水流Ｗは、フランジｂに差し掛かる部位では、急に９０度の角度を以て水平方向へ向きを変えることはできずにフランジｂを激しく叩く様に激突し、かかる現象が弁体の振動を誘発し、この振動が配管系の振動や騒音に発展する課題を有している。
そこで、本発明では、脈動による弁体への衝撃を緩和すると共に、開弁時に弁体に発生する振動を防止したリリーフ弁を提供することを目的としている。 However, in the above relief valve, as shown in FIG. 4, the valve body a is formed in an inverted trapezoidal shape with a flange b provided on the upper part, and the flange b is provided on the valve seat c so as to be attachable / detachable. Therefore, the pulsation of the pressure fluid discharged from the hydraulic pump is directly transmitted to the valve body a, and even when the valve is closed, the valve body a is bounced by receiving the impact of the pulsating water straight. This causes an unstable state in which contact is repeated violently.
Further, since the flange b of the valve body a is bent 90 degrees from the upper edge of the inclined portion d and protrudes horizontally, the water flow W flowing along the inclined portion d of the valve body a at the time of valve opening is In the part approaching the flange b, the direction cannot be suddenly changed in the horizontal direction at an angle of 90 degrees, and the flange b is struck violently, and this phenomenon induces vibration of the valve body. However, it has a problem of developing into vibration and noise of the piping system.
In view of the above, an object of the present invention is to provide a relief valve that alleviates the impact on the valve body due to pulsation and prevents vibration generated in the valve body when the valve is opened.

上記課題に鑑み、本発明に係るリリーフ弁は、一次側流路と二次側流路とに連通する弁口の二次側開口端に一次側へ向かうに従い徐々に縮径して設けたテーパー状の弁座と、該弁座に着離可能な逆円錐台状部を設けると共に、該逆円錐台状部の上端周縁に円形板状の鍔部を外方へ水平突設した弁体と、該弁体を閉弁方向へ付勢したバネとを設けて成り、弁体の傾斜部と鍔部とは緩徐な弧状曲線にて連続させ、弁口の一次側を障壁にて閉塞すると共に、該障壁には、弁体の下部小端面に位置対応する複数の求心側分水路と、弁体の傾斜部側に位置対応する複数の遠心側分水路とを縦貫形成して一次側流路と弁口とを連通させたことを特徴とする。   In view of the above problems, the relief valve according to the present invention is a taper that is gradually reduced in diameter toward the primary side at the secondary side opening end of the valve port communicating with the primary side channel and the secondary side channel. And a valve body provided with an inverted frustoconical portion that can be attached to and detached from the valve seat, and a circular plate-shaped flange portion protruding horizontally outward from the upper end periphery of the inverted frustoconical portion. The valve body is provided with a spring that urges the valve body in the valve closing direction, and the inclined portion and the flange portion of the valve body are continuous with a slow arc-shaped curve, and the primary side of the valve port is closed with a barrier. In the barrier, a plurality of centripetal side diversion channels corresponding to the lower small end surface of the valve body and a plurality of centrifugal side diversion channels corresponding to the inclined portion side of the valve body are formed vertically to form a primary side flow path. And the valve opening.

要するに本発明によれば、一次側流路と二次側流路とに連通する弁口の一次側には、複数の求心側分水路と遠心側分水路とを縦貫形成した障壁を設けたので、液圧ポンプから吐出される圧力流体は障壁に突き当たって衝撃的な水激が緩衝されると共に、複数の求心側分水路と遠心側分水路を通過することによって多くの小さな流れに分散させることができ、これにより弁体に到達する水流の脈動を緩和できるため、閉弁時において従来生じていた弁体が弾んで弁座に激しく接触を繰り返す様な不安定な状態を解消でき、又開弁初期時にも脈動による衝撃的な水撃の影響を受けることがないため、弁体の開弁初期動作をも安定させられる。
又、弁体の傾斜部と鍔部とは緩徐な弧状曲線にて連続しているので、かかる弧状曲線によって前記傾斜部側に位置対応させた複数の遠心側分水路から吹き出す水流は、傾斜部から鍔部へと急激に向きを変える必要がなく前記緩徐な弧状曲線に沿ってスムーズに流れ、二次側流路へと流出でき、これにより弁体の振動を防止できる。
ただ、遠心側分水路から吹き出す水流が上記の様に弁体の傾斜部と鍔部の表面に沿って二次側流路へとスムーズに流れるため、弁体の振動を抑止できるものの鍔部には弁体を所望の開度を以て開弁方向へ押し上げる推進力が作用しなくなるが、弁体の下部小端面に位置対応する複数の求心側分水路から吹き出す水流が、前記下部小端面を押圧して弁体の開弁を助勢するため、弁体は従前と同様に所定開度を以て開弁でき、かかる開度に応じた安定した流量を確保できる。
よって、本発明によれば、開閉弁時のいずれにあっても弁体が振動しない安定した状態を保持できるので、従来弁体の振動に起因するリリーフ弁の故障や配管系に発展する振動や騒音の発生及びそれに伴う配管、その他の機器類の破損等を防止できると共に、リリーフ弁を良好に制御できる等その実用的効果甚だ大である。 In short, according to the present invention, since the primary side of the valve port communicating with the primary side flow path and the secondary side flow path is provided with a barrier formed by longitudinally connecting a plurality of centripetal side diversion paths and centrifugal side diversion paths. , The pressure fluid discharged from the hydraulic pump hits the barrier, shock shocking water is buffered, and it is dispersed into many small flows by passing through multiple centripetal side diversion channels and centrifugal side diversion channels As a result, the pulsation of the water flow reaching the valve body can be mitigated, so that it is possible to eliminate the unstable state in which the valve body bounces when the valve is closed and repeats violent contact with the valve seat. Since it is not affected by shocking water hammer due to pulsation even at the initial stage of the valve, the initial opening operation of the valve body can be stabilized.
In addition, since the inclined portion and the flange portion of the valve body are continuous with a slow arc-shaped curve, the water flow blown out from the plurality of centrifugal-side diversion channels corresponding to the inclined portion side by the arc-shaped curve is the inclined portion. There is no need to suddenly change the direction from the flange to the buttocks, and the flow can smoothly flow along the slow arc-shaped curve and flow out to the secondary side flow path, thereby preventing vibration of the valve body.
However, since the water flow blown out from the centrifugal diversion channel flows smoothly to the secondary side flow path along the surface of the inclined part of the valve body and the flange part as described above, the vibration of the valve body can be suppressed. However, the propulsive force that pushes the valve body in the valve opening direction with a desired opening does not act, but the water flow that blows out from a plurality of centripetal side diversion channels corresponding to the lower small end face of the valve presses the lower small end face. Therefore, the valve body can be opened with a predetermined opening degree as before, and a stable flow rate corresponding to the opening degree can be secured.
Therefore, according to the present invention, it is possible to maintain a stable state in which the valve body does not vibrate at any time of the on-off valve, so that the relief valve failure caused by the vibration of the conventional valve body or the vibration developed in the piping system It is possible to prevent the generation of noise and the accompanying damage to piping and other equipment, and to control the relief valve well.

以下本発明の実施の形態としての実施例を図面に基づいて説明する。
図１に本発明に係るリリーフ弁の閉弁時の縦断面図を示す。
このリリーフ弁は、液圧ポンプを備えた配管系において、液圧ポンプの吐出口に連結した給水管から分岐した戻り配管と受水タンクの間に介装（図示せず）されるものにして、その弁箱１は下部に開設した入口２に通ずる一次側流路３と側方に開設した出口４に通ずる二次側流路５が直角に配置されたアングル形と成している。
そして、一次側流路３においてその同一軸線上の下流（弁箱１内の略中央に相当）には、金属製の弁座ユニット６が挿嵌固定されている。 Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a longitudinal sectional view of the relief valve according to the present invention when the relief valve is closed.
The relief valve is interposed (not shown) between the return pipe branched from the water supply pipe connected to the discharge port of the hydraulic pump and the water receiving tank in the piping system including the hydraulic pump. The valve box 1 has an angle shape in which a primary flow path 3 communicating with an inlet 2 opened at a lower portion and a secondary flow path 5 communicating with an outlet 4 opened laterally are arranged at right angles.
A metal valve seat unit 6 is inserted and fixed downstream of the primary flow path 3 on the same axis (corresponding to the approximate center in the valve box 1).

弁座ユニット６は、図２、３にも示す様に、中空部を一次側流路３と二次側流路５に連通する弁口７と成した略円筒状に形成され、弁口７の二次側開口端に一次側へ向かうに従い徐々に縮径させたテーパー状の弁座８を設けている。
又、弁口７内において弁座８（二次側開口端）より所定間隔を離隔した部位には、所定肉厚を有する障壁９を設けて弁口７の一次側を閉塞すると共に、該障壁９において、これと同軸の求心側及び遠心側の２つの円周上の夫々には、所定間隔置きに複数の円筒状から成る求心側分水路10及び遠心側分水路11を縦貫形成し、一次側流路３と弁口７とを連通させている。
更に、障壁９において、入口２に対向する下面中心には短尺な円形凸部を設けると共に、障壁９の上面中心から前記円形凸部に渡って後述する弁体12の弁軸13を摺動自在に挿嵌するガイド孔14を凹設している。 As shown in FIGS. 2 and 3, the valve seat unit 6 is formed in a substantially cylindrical shape having a hollow portion and a valve port 7 communicating with the primary channel 3 and the secondary channel 5. A tapered valve seat 8 that is gradually reduced in diameter toward the primary side is provided at the secondary opening end.
Further, a barrier 9 having a predetermined thickness is provided at a portion spaced apart from the valve seat 8 (secondary opening end) in the valve port 7 to close the primary side of the valve port 7, and the barrier 9, a centripetal side diversion channel 10 and a centrifugal side diversion channel 11 each having a plurality of cylindrical shapes are vertically formed at predetermined intervals on each of the two circumferences on the centripetal side and the centrifugal side, which are coaxial therewith. The side flow path 3 and the valve port 7 are connected.
Further, in the barrier 9, a short circular convex portion is provided at the center of the lower surface facing the inlet 2, and a valve shaft 13 of the valve body 12 to be described later is slidable from the center of the upper surface of the barrier 9 to the circular convex portion. A guide hole 14 to be inserted and fitted is recessed.

弁体12は、金属製から成り、弁座８に着離可能な逆円錐台状部15を設けると共に、該逆円錐台状部15の上端周縁に円形板状の鍔部16を外方へ水平突設して成り、逆円錐台状部15のテーパー状の傾斜部15ａと鍔部16とは図３に示す様に緩徐な弧状曲線Ｃにて連続させている。
そして、逆円錐台状部15の下部小端面15ｂの中心には、弁軸13を垂設している。
又、弁体12の下部小端面15ｂと求心側分水路10とは相互に位置対応し、弁体12（逆円錐台状部15）の傾斜部15ａ側と遠心側分水路11とは相互に位置対応する様に設定されている（図２の二点鎖線及び図３参照）。
尚、本実施例では、図２に示す様に、求心側分水路10は遠心側分水路11より小径に形成したものを示したが、弁体12の下部小端面15ｂ及び傾斜部15ａ側の夫々に求心側分水路10及び遠心側分水路11が位置対応されているならば、両分水路10、11は同径であっても良い。 The valve body 12 is made of metal, and is provided with an inverted truncated cone-shaped portion 15 that can be attached to and detached from the valve seat 8, and a circular plate-shaped flange portion 16 outwardly at the upper end periphery of the inverted truncated cone-shaped portion 15. As shown in FIG. 3, the tapered inclined portion 15a and the flange portion 16 of the inverted frustoconical portion 15 are connected by a slow arc-shaped curve C.
A valve shaft 13 is suspended from the center of the lower small end surface 15b of the inverted truncated cone portion 15.
Further, the lower small end face 15b of the valve body 12 and the centripetal side diversion passage 10 correspond to each other, and the inclined portion 15a side of the valve body 12 (inverted truncated cone portion 15) and the centrifugal diversion passage 11 are mutually opposite. The positions are set so as to correspond to each other (see the two-dot chain line in FIG. 2 and FIG. 3).
In this embodiment, as shown in FIG. 2, the centripetal side diversion channel 10 is formed to have a smaller diameter than the centrifugal side diversion channel 11, but the lower small end surface 15b and the inclined portion 15a side of the valve body 12 are shown. If the centripetal-side diversion channel 10 and the centrifugal-side diversion channel 11 are associated with each other, the two diversion channels 10 and 11 may have the same diameter.

弁体12の上端面中心には、底部が円錐孔状の弁棒当接部17が凹設され、該弁棒当接部17の上方に対応する弁箱１の上端面に調節ねじ18を上下動自在に貫通螺着し、該調節ねじ18はその下端面中心から上端へ渡って弁棒挿嵌孔19を凹設している。
そして、弁棒当接部17の底部に弁棒20の円錐状の下端を接触させると共に、弁棒20上端を調節ねじ18の弁棒挿嵌孔19に摺動自在に挿入し、調節ねじ18下端と弁棒20の下端近傍に設けた大径段部の夫々に、弁棒20を挿通したバネ受け21、21ａを配置し、該バネ受け21、21ａ間に弁棒20に外嵌したコイル状のバネ22を圧縮介装し、該バネ22にて弁体12を閉弁方向へ付勢している。
又、調節ねじ18の突端側にはロックナット23を螺着しており、弁箱１上端には調節ねじ18を被冠するキャップ24を水密状に螺着している。 In the center of the upper end surface of the valve body 12, a valve rod abutting portion 17 having a conical hole at the bottom is recessed, and an adjusting screw 18 is provided on the upper end surface of the valve box 1 above the valve rod abutting portion 17. The adjustment screw 18 has a valve rod insertion hole 19 recessed from the center of the lower end surface to the upper end.
Then, the bottom end of the valve stem contact portion 17 is brought into contact with the conical lower end of the valve stem 20, and the upper end of the valve stem 20 is slidably inserted into the valve stem insertion hole 19 of the adjustment screw 18, so that the adjustment screw 18 A coil having spring receivers 21 and 21a inserted through the valve stem 20 disposed on the lower end and the large-diameter step portion provided near the lower end of the valve stem 20 and externally fitted to the valve stem 20 between the spring receivers 21 and 21a. A spring 22 is compressed and urged by the spring 22 in the valve closing direction.
A lock nut 23 is screwed onto the protruding end side of the adjusting screw 18, and a cap 24 that covers the adjusting screw 18 is screwed to the upper end of the valve box 1 in a watertight manner.

上記の様に構成されたリリーフ弁にあっては、閉弁時において、液圧ポンプから吐出される圧力流体の脈動によって生じる衝撃的な水激が一次側流路３に流入しても、障壁９に突き当たってその衝撃が緩衝されると共に、複数の求心側分水路10と遠心側分水路11を通過することによって多くの小さな流れに分散されるため、閉弁状態の弁体12に到達する水流は脈動が緩和されてほぼ静流化し、脈動による衝撃を弁体12に及ぼすことがない。
このため、弁体12は脈動による周期的な衝撃を受けて弾んで弁座８に激しく接触を繰り返す様な不安定な状態が阻止されると共に、その開弁初期動作をも安定させられる。 In the relief valve configured as described above, even when a shocking hydrostatic force generated by the pulsation of the pressure fluid discharged from the hydraulic pump flows into the primary side flow path 3 when the valve is closed, a barrier is provided. 9, the impact is buffered, and since it is dispersed into many small flows by passing through the plurality of centripetal side diversion channels 10 and the centrifugal side diversion channels 11, it reaches the valve body 12 in the closed state. The pulsation is relaxed and the water flow becomes almost static, and the impact caused by the pulsation does not affect the valve body 12.
For this reason, the valve body 12 is prevented from an unstable state in which the valve body 12 is bounced by a periodic shock due to pulsation and repeatedly contacts the valve seat 8 violently, and the initial valve opening operation is also stabilized.

そして、弁体12の開弁方向に作用する液圧ポンプからの吐出圧が所定値以上に達してバネ22による閉弁方向の付勢力を上回ると、弁体12は開弁する。
かかる開弁時においては、弁体12の逆円錐台状部15の傾斜部15ａ側に位置対応する遠心分水路11から吹き出す水流W1は、傾斜部15ａの傾斜に沿って逆上り、傾斜部15ａと鍔部16の境界では緩徐な弧状曲線Ｃによって急激に流れの進路変更することなく緩やかにその弧状曲線Ｃに沿って鍔部16へ向きを変え、続いて鍔部16に沿って二次側流路５へとスムーズに流出される。
この様に、水流W1は弁体12の傾斜部15ａと鍔部16の表面に沿って二次側流路５へとスムーズに流れるため、鍔部16に衝撃を与えることがなく、弁体12の振動が防止される。
ただ、遠心側分水路11から吹き出す水流W1が上記の如くスムーズに流れるため、弁体12の振動は抑止できるが、鍔部16には弁体12を所望の開度を以て開弁方向へ押し上げるに十分な推進力が作用しなくなる。
一方、弁体12の下部小端面15ｂに位置対応する複数の求心側分水路10から吹き出す水流W2は、下部小端面15ｂを押圧しているので、遠心側分水路11から吹き出す水流W1だけでは不足する上記推進力を助勢でき、よって弁体12は従前と同様に所定開度を以て開弁でき、かかる開度に応じた安定した流量が確保される。 When the discharge pressure from the hydraulic pump acting in the valve opening direction of the valve body 12 reaches a predetermined value or more and exceeds the urging force in the valve closing direction by the spring 22, the valve body 12 is opened.
At the time of such valve opening, the water flow W1 blown out from the centrifugal diversion channel 11 corresponding to the inclined portion 15a side of the inverted truncated cone portion 15 of the valve body 12 rises backward along the inclination of the inclined portion 15a, and the inclined portion 15a At the boundary between the heel portion 16 and the heel portion 16, the direction gradually changes to the heel portion 16 along the arc-shaped curve C without abruptly changing the course of the flow by the slow arc shape curve C. It smoothly flows out to the flow path 5.
In this way, the water flow W1 smoothly flows along the inclined portion 15a of the valve body 12 and the surface of the flange portion 16 to the secondary-side flow path 5, so that no impact is applied to the flange portion 16 and the valve body 12 is not affected. Is prevented from vibrating.
However, since the water flow W1 blown out from the centrifugal side diversion channel 11 flows smoothly as described above, the vibration of the valve body 12 can be suppressed, but the flange body 16 has the valve body 12 pushed up in the valve opening direction with a desired opening degree. Sufficient driving force will not work.
On the other hand, the water flow W2 blown out from the plurality of centripetal side diversion channels 10 corresponding to the position of the lower small end surface 15b of the valve body 12 presses the lower small end surface 15b, so that only the water flow W1 blown out from the centrifugal side diversion channel 11 is insufficient. Therefore, the valve element 12 can be opened with a predetermined opening as before, and a stable flow rate corresponding to the opening is ensured.

本発明に係るリリーフ弁の閉弁時の縦断面図である。It is a longitudinal cross-sectional view at the time of valve closing of the relief valve which concerns on this invention. 弁座ユニットの平面図である。It is a top view of a valve seat unit. 図２のＡーＡ切断線に基づく開弁時における要部拡大縦断面図である。FIG. 3 is an enlarged longitudinal sectional view of a main part at the time of valve opening based on the AA cutting line of FIG. 従来のリリーフ弁における開弁状態を示す要部拡大縦断面図である。It is a principal part expansion longitudinal cross-sectional view which shows the valve opening state in the conventional relief valve.

符号の説明Explanation of symbols

３ 一次側流路
５ 二次側流路
７ 弁口
８ 弁座
９ 障壁
10 求心側分水路
11 遠心側分水路
12 弁体
15 逆円錐台状部
15ａ 傾斜部
15ｂ 下部小端面
16 鍔部
22 バネ
Ｃ 弧状曲線
3 Primary side flow path 5 Secondary side flow path 7 Valve port 8 Valve seat 9 Barrier
10 Centripetal diversion channel
11 Centrifugal diversion
12 Disc
15 Reverse frustoconical part
15a Inclined part
15b Lower end face
16 Buttocks
22 Spring C Arc curve

Claims (1)

一次側流路と二次側流路とに連通する弁口の二次側開口端に一次側へ向かうに従い徐々に縮径して設けたテーパー状の弁座と、該弁座に着離可能な逆円錐台状部を設けると共に、該逆円錐台状部の上端周縁に円形板状の鍔部を外方へ水平突設した弁体と、該弁体を閉弁方向へ付勢したバネとを設けて成り、弁体の傾斜部と鍔部とは緩徐な弧状曲線にて連続させ、弁口の一次側を障壁にて閉塞すると共に、該障壁には、弁体の下部小端面に位置対応する複数の求心側分水路と、弁体の傾斜部側に位置対応する複数の遠心側分水路とを縦貫形成して一次側流路と弁口とを連通させたことを特徴とするリリーフ弁。
A tapered valve seat that is gradually reduced in diameter toward the primary side at the secondary side opening end of the valve port communicating with the primary side flow path and the secondary side flow path, and attachable to and detachable from the valve seat Provided with a reverse frustoconical part, a valve body having a circular plate-like flange projecting outwardly at the upper edge of the reverse frustoconical part, and a spring that urges the valve body in the valve closing direction The inclined portion and the flange portion of the valve body are made continuous with a slow arc-shaped curve, and the primary side of the valve port is closed with a barrier, and the barrier is formed on the lower small end surface of the valve body. A plurality of centripetal-side diversion channels corresponding to positions and a plurality of centrifugal-side diversion channels corresponding to positions on the inclined portion side of the valve body are vertically formed to communicate the primary-side flow path and the valve port. Relief valve.
JP2007020265A 2007-01-31 2007-01-31 Relief valve Pending JP2008185163A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007020265A JP2008185163A (en) 2007-01-31 2007-01-31 Relief valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007020265A JP2008185163A (en) 2007-01-31 2007-01-31 Relief valve

Publications (1)

Publication Number Publication Date
JP2008185163A true JP2008185163A (en) 2008-08-14

Family

ID=39728344

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007020265A Pending JP2008185163A (en) 2007-01-31 2007-01-31 Relief valve

Country Status (1)

Country Link
JP (1) JP2008185163A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101410622B1 (en) 2011-09-22 2014-06-20 니이쿠라 코교 가부시끼가이샤 Relief valve
JP2015512498A (en) * 2012-03-27 2015-04-27 フィッシャー コントロールズ インターナショナル リミテッド ライアビリティー カンパニー Flow correction valve seat and control valve with flow correction valve seat
CN112304167A (en) * 2020-12-31 2021-02-02 星河动力(北京)空间科技有限公司 Air pressure balancing device for carrier rocket and carrier rocket

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101410622B1 (en) 2011-09-22 2014-06-20 니이쿠라 코교 가부시끼가이샤 Relief valve
JP2015512498A (en) * 2012-03-27 2015-04-27 フィッシャー コントロールズ インターナショナル リミテッド ライアビリティー カンパニー Flow correction valve seat and control valve with flow correction valve seat
CN112304167A (en) * 2020-12-31 2021-02-02 星河动力(北京)空间科技有限公司 Air pressure balancing device for carrier rocket and carrier rocket

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