JP3349669B2 - Residual pressure release three-way valve - Google Patents
Residual pressure release three-way valveInfo
- Publication number
- JP3349669B2 JP3349669B2 JP31901298A JP31901298A JP3349669B2 JP 3349669 B2 JP3349669 B2 JP 3349669B2 JP 31901298 A JP31901298 A JP 31901298A JP 31901298 A JP31901298 A JP 31901298A JP 3349669 B2 JP3349669 B2 JP 3349669B2
- Authority
- JP
- Japan
- Prior art keywords
- flow path
- inflow
- outflow
- side flow
- sleeve
- 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.)
- Expired - Fee Related
Links
Landscapes
- Multiple-Way Valves (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【発明の属する技術分野】本発明は、流体圧アクチュエ
ータを作動させる流体圧システムと流体圧源との間など
に配置する３ポート残圧抜三方弁に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-port residual pressure relief three-way valve disposed between a fluid pressure source and a fluid pressure system for operating a fluid pressure actuator.
【０００２】[0002]
【従来の技術】図３は、本出願人が以前に考えた残圧抜
三方弁を示す。即ち、ボディ10の中央孔11内にＯリング
シール17、18を介してスリーブ12が配設され、中央孔11
の内面であって中央孔11の中心軸線Ｘ−Ｘを挟んで対向
しかつ軸線方向に変位した上下２つの位置に、流入側流
路21及び流出側流路22が開口されている。流入側流路21
の開口の内側のスリーブ円筒壁及び流出側流路22の開口
の内側のスリーブ隣接部に流入側連通路29（スリーブ12
の環状部32と筒状部33との間を切り欠いた開口部）及び
流出側連通路30（スリーブ12の環状部32の右側下端と中
央孔11の下端環状部37との間の通路）が形成されてい
る。中央孔11の軸方向下方の位置に排出側流路23が形成
され、スプール13によって流れが切り換えられ、中央孔
11とスリーブ12の間隙であって流入側流路21・流入側連
通路29と流出側流路22・流出側連通路30との間の部分が
Ｏリングシール17でシールされている。FIG. 3 shows a residual pressure relief three-way valve previously considered by the applicant. That is, the sleeve 12 is disposed in the center hole 11 of the body 10 via the O-ring seals 17 and 18, and the center hole 11
The inflow-side flow path 21 and the outflow-side flow path 22 are opened at two upper and lower positions that face each other across the central axis XX of the central hole 11 and are displaced in the axial direction. Inflow channel 21
The inflow side communication passage 29 (sleeve 12) is formed in the sleeve cylindrical wall inside the opening of
And an outflow side communication passage 30 (a passage between the lower right end of the annular portion 32 of the sleeve 12 and the lower end annular portion 37 of the central hole 11). Are formed. A discharge-side flow path 23 is formed at a position axially below the central hole 11, and the flow is switched by the spool 13.
A portion between the inlet 11 and the sleeve 12 and between the inflow-side flow path 21 / inflow-side communication path 29 and the outflow-side flow path 22 / outflow-side communication path 30 is sealed with an O-ring seal 17.
【０００３】図３はスプール13が下端位置にある状態を
示し、このときスプール13の下側ランド14はスプール挿
入孔19内に嵌合されて排出側流路23が閉鎖され、圧力源
からの流体が流入側ポート25から流入側流路21・流入側
連通路29及びスリーブ13の環状部32内を通り、流出側流
路22・流出側ポート26を通って流体圧システムへ流体が
流れている。スプール13を下端位置から中立位置へ移動
させると、下側ランド14の上側シール35がスリーブ12の
環状部32の内面に接触し、下側ランド14の下側シール36
がスプール挿入孔19の内面に接触して、流入側流路21、
流出側流路22及びスプール挿入孔19の下端の排出側流路
23が閉鎖される。スプール13を中立位置から上端位置へ
移動させると、下側ランド14の下端がスプール挿入孔19
から抜け出して、流入側流路21が閉鎖され、流出側流路
22と排出側流路23とが連通され、流体圧システムの残圧
が流出ポート26からスプール挿入孔19、排出側ポート27
を通って外部に排出される。FIG. 3 shows a state in which the spool 13 is at the lower end position. At this time, the lower land 14 of the spool 13 is fitted into the spool insertion hole 19, the discharge side flow path 23 is closed, and the pressure from the pressure source is reduced. Fluid flows from the inflow side port 25 to the inflow side flow path 21, the inflow side communication path 29, and the annular portion 32 of the sleeve 13, passes through the outflow side flow path 22, and the outflow side port 26 to the fluid pressure system. I have. When the spool 13 is moved from the lower end position to the neutral position, the upper seal 35 of the lower land 14 contacts the inner surface of the annular portion 32 of the sleeve 12, and the lower seal 36 of the lower land 14
Contacts the inner surface of the spool insertion hole 19, and the inflow-side flow path 21,
Outflow side flow path 22 and discharge side flow path at the lower end of spool insertion hole 19
23 is closed. When the spool 13 is moved from the neutral position to the upper end position, the lower end of the lower land 14
And the inflow side channel 21 is closed, and the outflow side channel
22 and the discharge side flow path 23 are communicated, and the residual pressure of the fluid pressure system flows from the outflow port 26 to the spool insertion hole 19 and the discharge side port 27.
Is discharged to the outside.
【０００４】[0004]
【発明が解決しようとする課題】空気圧システム等の流
体圧システムにおいて、システムの効率を向上させて省
エネルギーに寄与することが求められている。省エネル
ギーのためには、残圧抜三方弁のボディ10の中央孔11の
直径を変えることなく、残圧抜三方弁の流路を流れ易く
（バルブの有効断面積を大きく）することが必要であ
る。図３から分かるように、残圧抜三方弁の流路を流れ
易くするためには、流入側流路21・流出側流路22の断面
積を大きくし、かつ流入側連通路29・流出側連通路30の
断面積も大きくすることが望ましい。しかし、流路の切
換のためにスリーブ12の環状部32の上下幅をこれ以上狭
くすることはできず、環状部32に合わせて、Ｏリングシ
ール17を中央孔11の中心軸線Ｘ−Ｘに垂直な面上に位置
させ、流入側流路21・流出側流路22の断面積を流入側連
通路29・流出側連通路30の断面積と対応する大きさにし
ていた。In a hydraulic system such as a pneumatic system, it is required to improve the efficiency of the system and to contribute to energy saving. In order to save energy, it is necessary to make it easier to flow through the flow path of the residual pressure relief three-way valve (to increase the effective area of the valve) without changing the diameter of the central hole 11 of the body 10 of the residual pressure relief three-way valve. is there. As can be seen from FIG. 3, in order to make the flow of the three-way valve for releasing residual pressure easier, the cross-sectional areas of the inflow side flow path 21 and the outflow side flow path 22 are increased, and the inflow side communication path 29 and the outflow side It is desirable to increase the cross-sectional area of the communication passage 30 as well. However, the vertical width of the annular portion 32 of the sleeve 12 cannot be further reduced to switch the flow path, and the O-ring seal 17 is aligned with the central axis XX of the central hole 11 in accordance with the annular portion 32. The cross-sectional area of the inflow-side flow path 21 and the outflow-side flow path 22 is set to a size corresponding to the cross-sectional area of the inflow-side communication path 29 and the outflow-side communication path 30.
【０００５】本発明は、残圧抜三方弁の流路を流れ易く
するために、流入側連通路及び流出側連通路の断面積は
その儘にして、中央孔に開口する流入側流路及び流出側
流路の断面積を大きくすることを課題とする。In order to facilitate the flow of the residual pressure relief three-way valve, the present invention maintains the cross-sectional area of the inflow-side communication passage and the outflow-side communication passage unchanged, while maintaining the cross-sectional area of the inflow-side flow passage opening in the center hole. It is an object to increase the cross-sectional area of the outflow-side channel.
【０００６】[0006]
【課題を解決するための手段】本発明は、前記課題を解
決するために、ボディの中央孔内にＯリングシールを介
してスリーブが配設され、中央孔の内面であって中央孔
の中心軸線を挟んで対向しかつ軸線方向に変位した２つ
の位置に、流入側流路及び流出側流路が開口され、流入
側流路の開口の内側のスリーブ円筒壁及び流出側流路の
開口の内側のスリーブ隣接部に流入側連通路及び流出側
連通路がそれぞれ形成され、中央孔の軸方向位置に排出
側流路が形成され、スプールによって流れが切り換えら
れ、中央孔とスリーブの間隙であって流入側流路・流入
側連通路と流出側流路・流出側連通路との間の部分がＯ
リングシールでシールされた残圧抜三方弁において、Ｏ
リングシールを中央孔の中心軸線の垂直面に対して傾斜
させたことを第１構成とする。本発明は、第１構成にお
いて、流入側ポートの中心線と流出側ポートの中心線と
は同一軸線上にあり、中央孔の中心軸線を垂直として流
入側流路を流出側流路よりも上方に位置させたとき、流
入側流路断面の下端以外の内周は、流入側ポート断面の
内周の上側円弧部分とほぼ一致し、かつ流出側流路断面
の上端以外の内周は、流出側ポート断面の内周の下側円
弧部分とほぼ一致し、流入側流路断面の下端が流入側ポ
ートの中心線より下方に位置し、流出側流路断面の上端
が流出側ポートの中心線より上方に位置し、スリーブの
下端に隣接してスプール挿入孔が形成され、スプールの
中央位置で各流路が閉鎖され、スプールの下端位置で流
入側流路と流出側流路とが連通されるとともに排出流路
が閉鎖され、スプールの上端位置で流入側流路が閉鎖さ
れるとともに流出側流路と排出流路とが連通されること
を第２構成とする。In order to solve the above-mentioned problems, according to the present invention, a sleeve is provided in a center hole of a body via an O-ring seal, and a sleeve is provided on an inner surface of the center hole and the center of the center hole. The inflow-side flow path and the outflow-side flow path are opened at two positions opposed to each other with the axis interposed therebetween and displaced in the axial direction. The sleeve cylindrical wall inside the opening of the inflow-side flow path and the opening of the outflow-side flow path are formed. An inflow-side communication passage and an outflow-side communication passage are respectively formed in the inner portion adjacent to the sleeve, a discharge-side flow passage is formed at an axial position of the central hole, the flow is switched by the spool, and a gap between the central hole and the sleeve is formed. The portion between the inflow side flow path / inflow side communication path and the outflow side flow path / outflow side communication path is O
In the residual pressure relief three-way valve sealed with a ring seal, O
That it is inclined <br/> the ring seal against the vertical plane of the central axis of the central bore and the first configuration. According to the present invention, in the first configuration, the center line of the inflow-side port and the center line of the outflow-side port are on the same axis, and the center axis of the central hole is vertical and the inflow-side flow path is higher than the outflow-side flow path. , The inner circumference other than the lower end of the inflow-side flow path cross section substantially matches the upper arc portion of the inner circumference of the inflow-side port cross-section, and the inner circumference other than the upper end of the outflow-side flow path cross section has an outflow. The lower end of the inflow-side flow path cross-section is located below the center line of the inflow-side port, and the upper end of the outflow-side flow path cross-section is the center line of the outflow-side port. A spool insertion hole is formed above and adjacent to the lower end of the sleeve, and each flow path is closed at the center position of the spool, and the inflow side flow path and the outflow side flow path are communicated at the lower end position of the spool. And the discharge passage is closed. The outflow side flow passage with the Kusarisa and discharge channel to the second configuration to be communicated.
【０００７】[0007]
【発明の実施の形態】図１及び図２は本発明の残圧抜三
方弁の実施の形態を示す。図１及び図２の説明におい
て、図１と同一の部材については図１と同一の符号を付
し、その説明は省略する。本発明の実施の形態では、流
入側流路21の断面積を図３のものよりも大きくし、それ
に伴って流入側流路21側（図１では左側）のＯリングシ
ール17の位置を下方へずらした。同時に流出側流路22の
断面積を同様に大きくし、それに伴って流出側流路22側
（図１では右側）のＯリングシール17の位置を上方へず
らした。それに伴い、中央孔11の中心軸線の垂直面に対
して右側を上方に傾斜させた面上にＯリングシール17を
配置した。1 and 2 show an embodiment of a residual pressure release three-way valve according to the present invention. 1 and 2, the same members as those in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and the description thereof will be omitted. In the embodiment of the present invention, the cross-sectional area of the inflow-side flow path 21 is made larger than that in FIG. 3, and accordingly, the position of the O-ring seal 17 on the inflow-side flow path 21 side (the left side in FIG. 1) is lowered. I shifted. At the same time, the cross-sectional area of the outflow-side flow path 22 was similarly increased, and accordingly, the position of the O-ring seal 17 on the outflow-side flow path 22 side (the right side in FIG. 1) was shifted upward. Accordingly, the O-ring seal 17 is disposed on a surface that is inclined upward on the right side with respect to a plane perpendicular to the central axis of the central hole 11.
【０００８】流入側ポート25の中心線と流出側ポート26
の中心線とは同一軸線上にある。図示のように、中央孔
11の中心軸線Ｘ−Ｘを垂直として流入側流路21を流出側
流路22よりも上方に位置させたとき、流入側流路21の断
面の下端39以外の内周は、流入側ポート25の断面の内周
の一部分と一致する。また、流出側流路22の断面の上端
40以外の内周は、流出側ポート26の断面の内周の一部分
と一致している。流入側流路21の断面の下端39が流入側
ポート25の中心線より下方に位置し、流出側流路22断面
の上端40が流出側ポート26の中心線より上方に位置して
いる。The center line of the inlet port 25 and the outlet port 26
Are on the same axis. Center hole as shown
When the inflow-side flow path 21 is positioned above the outflow-side flow path 22 with the central axis XX of 11 being vertical, the inner circumference of the cross-section of the inflow-side flow path 21 other than the lower end 39 is the inflow-side port 25. Coincides with a part of the inner circumference of the cross section. Also, the upper end of the cross section of the outflow side flow path 22
The inner circumference other than 40 coincides with a part of the inner circumference of the cross section of the outflow port 26. The lower end 39 of the cross section of the inflow side flow path 21 is located below the center line of the inflow side port 25, and the upper end 40 of the cross section of the outflow side flow path 22 is located above the center line of the outflow side port 26.
【０００９】スリーブ12は上方端部の直径が広げられ、
広げられた部分の外周面が中央孔11に接触し、中央孔11
の上端に形成された縦溝45にスリーブ12の上端の外面突
出部46が係合し、スリーブ12の回転が不能とされてい
る。中央孔11の上端部の環状溝には止め輪47が装着さ
れ、止め輪47によってスリーブ12の抜け出しが防止され
ている。スリーブ12の筒状部33と環状部32との間には、
流入側流路21の内側が所定幅にわたって切り欠いて流入
側連通路29が形成されている。また、スリーブ12の環状
部32の下側は、Ｏリングシール17を左側下方で支持する
ために、環状部32の左下側に円弧状部34（横断面）が延
長して一体に形成されている。なお、スプール13の縦方
向の中間部分には上側ランド15が形成され、上側ランド
15はスリーブ12の筒状部分33の内周面に摺動自在に嵌合
されている。The sleeve 12 has an enlarged diameter at the upper end,
The outer peripheral surface of the expanded portion contacts the central hole 11 and the central hole 11
The outer protrusion 46 at the upper end of the sleeve 12 is engaged with the vertical groove 45 formed at the upper end of the sleeve 12, so that rotation of the sleeve 12 is disabled. A retaining ring 47 is mounted in the annular groove at the upper end of the central hole 11, and the retaining ring 47 prevents the sleeve 12 from coming off. Between the tubular portion 33 and the annular portion 32 of the sleeve 12,
The inside of the inflow-side flow path 21 is cut out over a predetermined width to form an inflow-side communication path 29. The lower part of the annular part 32 of the sleeve 12 is formed integrally with the arc-shaped part 34 (transverse section) extending to the lower left of the annular part 32 in order to support the O-ring seal 17 at the lower left side. I have. Note that an upper land 15 is formed in the middle portion of the spool 13 in the vertical direction.
Reference numeral 15 is slidably fitted on the inner peripheral surface of the cylindrical portion 33 of the sleeve 12.
【００１０】スプール13の下側ランド14の内部には下方
端が開口した盲孔42が形成され、盲孔42の上端面とスプ
ール挿入孔19の下端面との間にバルブスプリング43が装
着され、バルブスプリング43によりスプール13が上方へ
向けて付勢されている。ボディ10の上方の筒状部分の外
周には筒状のカムリング49が回転可能に嵌合され、カム
リング49は逆カップ状のハンドル50の内面に連結されて
いる。カムリング49には軸対称の傾斜したカムリング溝
52が形成され（図２(a) 参照）、スプール13の上端の挿
通孔に挿通されたピン53の両端部が、カムリング溝52に
係合されている。スリーブ12の上端部には軸対称の縦溝
55が形成され、ボディ10の上端の筒状部分にも不図示の
縦溝が形成され、縦溝55及び不図示の縦溝にピン53が係
合して、スプール13の回転が防止されている。A blind hole 42 having an open lower end is formed inside the lower land 14 of the spool 13, and a valve spring 43 is mounted between the upper end surface of the blind hole 42 and the lower end surface of the spool insertion hole 19. The spool 13 is urged upward by the valve spring 43. A cylindrical cam ring 49 is rotatably fitted to the outer periphery of the cylindrical portion above the body 10, and the cam ring 49 is connected to the inner surface of the inverted cup-shaped handle 50. The cam ring 49 has an axially symmetric inclined cam ring groove.
52 is formed (see FIG. 2A), and both ends of the pin 53 inserted into the insertion hole at the upper end of the spool 13 are engaged with the cam ring groove 52. Axisymmetric longitudinal groove at upper end of sleeve 12
55 is formed, a vertical groove (not shown) is also formed in the cylindrical portion at the upper end of the body 10, and the pin 53 is engaged with the vertical groove 55 and the vertical groove (not shown), thereby preventing the rotation of the spool 13. I have.
【００１１】ボディ10の上下方向の中程の位置に環状溝
が形成され、この環状溝にハンドル50の下端部に挿入さ
れた複数個の止めピン56が係合して、ハンドル50の抜け
出しが防止されている。ハンドル50を回転させると、カ
ムリング49が同時に回転し、カムリング溝52に係合した
ピンが軸線上を移動する。この移動によってスプール13
を上端位置（図２(b) の残圧排出位置）、中立位置（図
２(a) の全閉位置）及び下端位置（図１の供給位置）に
移動させ、流路を切り換えることができる。なお、Ｏリ
ングシール17を装着しているスリーブ12の環状突出部及
びＯリングシール17の上側には流体圧力が作用し、その
水平方向分力がスリーブ12に作用する。その力に耐えさ
せるため、スリーブ12の図１の右側の環状突出部の上側
に受部材58が配設されている。An annular groove is formed at a middle position in the vertical direction of the body 10, and a plurality of stopper pins 56 inserted into the lower end of the handle 50 engage with the annular groove, so that the handle 50 can be pulled out. Has been prevented. When the handle 50 is rotated, the cam ring 49 rotates simultaneously, and the pin engaged with the cam ring groove 52 moves on the axis. This movement causes the spool 13
Can be moved to the upper end position (residual pressure discharge position in FIG. 2 (b)), the neutral position (fully closed position in FIG. 2 (a)) and the lower end position (supply position in FIG. 1) to switch the flow path. . In addition, a fluid pressure acts on the annular protrusion of the sleeve 12 on which the O-ring seal 17 is mounted and the upper side of the O-ring seal 17, and a horizontal component force acts on the sleeve 12. To withstand the force, a receiving member 58 is disposed above the annular protrusion on the right side of FIG.
【００１２】[0012]
【発明の効果】本発明では、Ｏリングシールを中央孔の
中心軸線の垂直面に対して傾斜させた。そのため、流入
側連通路及び流出側連通路の断面積はその儘であって
も、残圧抜三方弁の流路が流入側流路及び流出側流路の
開口面積の増大に応じて流れ易くなり、残圧抜三方弁の
有効断面積が大きくなって、流体圧システムの省エネル
ギーに寄与することとなった。また、流入側流路断面の
下端以外の内周は、流入側ポート断面の内周の一部分と
一致し、かつ流出側流路断面の上端以外の内周は、流出
側ポート断面の内周の一部分と一致し、流入側流路断面
の下端が流入側ポートの中心線より下方に位置し、流出
側流路断面の上端が流出側ポートの中心線より上方に位
置している。このように、従来例に比べ流入側流路及び
流出側流路が横幅の広い部分へ向かって増大したので、
流入側流路及び流出側流路の開口面積の増大は図１及び
図２の見掛けよりも相当大きいものである。In the present invention, is tilted O-ring seal with respect to a vertical plane of the central axis of the central bore. Therefore, even if the cross-sectional areas of the inflow-side communication passage and the outflow-side communication passage remain the same, the flow path of the residual pressure release three-way valve easily flows according to the increase in the opening area of the inflow-side flow path and the outflow-side flow path. As a result, the effective cross-sectional area of the residual pressure relief three-way valve is increased, contributing to energy saving of the fluid pressure system. In addition, the inner circumference other than the lower end of the inflow-side flow path cross section matches a part of the inner circumference of the inflow-side port cross-section, and the inner circumference other than the upper end of the outflow-side flow path cross section is the inner circumference of the outflow-side port cross section. The lower end of the cross section of the inflow side flow path is located below the center line of the inflow side port, and the upper end of the cross section of the outflow side flow path is positioned above the center line of the outflow side port. As described above, since the inflow-side flow path and the outflow-side flow path increased toward a portion having a wider width as compared with the conventional example,
The increase in the opening area of the inflow-side flow path and the outflow-side flow path is considerably larger than that in FIGS. 1 and 2.
【図１】本発明の残圧抜三方弁の実施の形態を示す縦断
面図である。FIG. 1 is a longitudinal sectional view showing an embodiment of a residual pressure release three-way valve of the present invention.
【図２】図２(a) は図１のスプール中立位置の縦断面図
であり、図２(b) は図１のスプール上端位置の縦断面図
である。2 (a) is a longitudinal sectional view of a spool neutral position in FIG. 1, and FIG. 2 (b) is a longitudinal sectional view of a spool upper end position in FIG.
【図３】従来の残圧抜三方弁の縦断面図である。FIG. 3 is a longitudinal sectional view of a conventional three-way valve for releasing residual pressure.
10 ボディ 11 中央孔 12 スリーブ 17 Ｏリングシール 18 Ｏリングシール 21 流入側流路 22 流出側流路 23 排出側流路 25 流入側ポート 26 流出側ポート 27 排出側ポート 29 流入側連通路 30 流出側連通路 39 下端 40 上端 10 Body 11 Center hole 12 Sleeve 17 O-ring seal 18 O-ring seal 21 Inflow side flow path 22 Outflow side flow path 23 Outflow side flow path 25 Inflow side port 26 Outflow side port 27 Outflow side port 29 Inflow side communication path 30 Outflow side Communication passage 39 Lower end 40 Upper end
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭62−91076（ＪＰ，Ｕ) 実開 昭62−200870（ＪＰ，Ｕ) 実開 昭57−141263（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F16K 11/00 - 11/24 F16K 51/00 F15B 11/00 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 62-91076 (JP, U) JP-A 62-200870 (JP, U) JP-A 57-141263 (JP, U) (58) Field (Int.Cl. 7 , DB name) F16K 11/00-11/24 F16K 51/00 F15B 11/00
Claims (2)
してスリーブが配設され、中央孔の内面であって中央孔
の中心軸線を挟んで対向しかつ軸線方向に変位した２つ
の位置に、流入側流路及び流出側流路が開口され、流入
側流路の開口の内側のスリーブ円筒壁及び流出側流路の
開口の内側のスリーブ隣接部に流入側連通路及び流出側
連通路がそれぞれ形成され、中央孔の軸方向位置に排出
側流路が形成され、スプールによって流れが切り換えら
れ、中央孔とスリーブの間隙であって流入側流路・流入
側連通路と流出側流路・流出側連通路との間の部分がＯ
リングシールでシールされた残圧抜三方弁において、Ｏ
リングシールを中央孔の中心軸線の垂直面に対して傾斜
させたことを特徴とする残圧抜三方弁。1. A sleeve is disposed in a center hole of a body via an O-ring seal. The sleeve is located at two positions on the inner surface of the center hole which are opposed to each other across the center axis of the center hole and are displaced in the axial direction. The inflow-side flow path and the outflow-side flow path are opened, and the inflow-side communication path and the outflow-side communication path are provided in the sleeve cylindrical wall inside the opening of the inflow-side flow path and the sleeve adjacent to the inside of the opening of the outflow-side flow path. A discharge-side flow path is formed at an axial position of the center hole, and the flow is switched by the spool. The gap between the center hole and the sleeve forms an inflow-side flow path, an inflow-side communication path, and an outflow-side flow path. O between the outflow side communication passage
In the residual pressure relief three-way valve sealed with a ring seal, O
Pressure relief three-way valve, characterized in that is inclined <br/> the ring seal against the vertical plane of the central axis of the central bore.
中心線とは同一軸線上にあり、中央孔の中心軸線を垂直
として流入側流路を流出側流路よりも上方に位置させた
とき、流入側流路断面の下端以外の内周は、流入側ポー
ト断面の内周の一部分と一致し、かつ流出側流路断面の
上端以外の内周は、流出側ポート断面の内周の一部分と
一致し、流入側流路断面の下端が流入側ポートの中心線
より下方に位置し、流出側流路断面の上端が流出側ポー
トの中心線より上方に位置し、スリーブの下端に隣接し
てスプール挿入孔が形成され、スプールの中央位置で各
流路が閉鎖され、スプールの下端位置で流入側流路と流
出側流路とが連通されるとともに排出流路が閉鎖され、
スプールの上端位置で流入側流路が閉鎖されるとともに
流出側流路と排出流路とが連通される請求項１記載の残
圧抜三方弁。2. The center line of the inflow-side port and the center line of the outflow-side port are on the same axis, and the inflow-side flow path is positioned higher than the outflow-side flow path with the central axis of the central hole being vertical. When the inner circumference other than the lower end of the inflow-side flow path cross section matches a part of the inner circumference of the inflow-side port cross-section, and the inner circumference other than the upper end of the outflow-side flow path cross section is the inner circumference of the outflow-side port cross section. The lower end of the inflow-side flow path cross section is located below the center line of the inflow-side port, and the upper end of the outflow-side flow path cross section is positioned above the center line of the outflow-side port, adjacent to the lower end of the sleeve. A spool insertion hole is formed, each flow path is closed at the center position of the spool, the inflow side flow path and the outflow side flow path are communicated at the lower end position of the spool, and the discharge flow path is closed,
The residual pressure relief three-way valve according to claim 1, wherein the inflow-side flow path is closed at an upper end position of the spool, and the outflow-side flow path and the discharge flow path are communicated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31901298A JP3349669B2 (en) | 1998-11-10 | 1998-11-10 | Residual pressure release three-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31901298A JP3349669B2 (en) | 1998-11-10 | 1998-11-10 | Residual pressure release three-way valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000145985A JP2000145985A (en) | 2000-05-26 |
| JP3349669B2 true JP3349669B2 (en) | 2002-11-25 |
Family
ID=18105524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31901298A Expired - Fee Related JP3349669B2 (en) | 1998-11-10 | 1998-11-10 | Residual pressure release three-way valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3349669B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101538081B1 (en) * | 2011-09-08 | 2015-07-20 | 에스엠씨 가부시키 가이샤 | Residual pressure release valve |
-
1998
- 1998-11-10 JP JP31901298A patent/JP3349669B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101538081B1 (en) * | 2011-09-08 | 2015-07-20 | 에스엠씨 가부시키 가이샤 | Residual pressure release valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000145985A (en) | 2000-05-26 |
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