JPH0419267Y2 - - Google Patents
Info
- Publication number
- JPH0419267Y2 JPH0419267Y2 JP1985166195U JP16619585U JPH0419267Y2 JP H0419267 Y2 JPH0419267 Y2 JP H0419267Y2 JP 1985166195 U JP1985166195 U JP 1985166195U JP 16619585 U JP16619585 U JP 16619585U JP H0419267 Y2 JPH0419267 Y2 JP H0419267Y2
- Authority
- JP
- Japan
- Prior art keywords
- poppet
- spool
- spring
- chamber
- inlet
- 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
Links
- 239000012530 fluid Substances 0.000 claims description 27
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 244000145845 chattering Species 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
Landscapes
- Safety Valves (AREA)
- Check Valves (AREA)
- Details Of Valves (AREA)
- Control Of Fluid Pressure (AREA)
Description
【考案の詳細な説明】
＜産業上の利用分野＞
この考案は、流体装置において流体の一方向へ
の流れを圧力制御し、反対方向への流れを自由流
れとするチエツク弁付圧力制御弁に関する。[Detailed description of the invention] <Industrial field of application> This invention relates to a pressure control valve with a check valve that pressure-controls the flow of fluid in one direction in a fluid device and provides free flow in the opposite direction. .
＜従来の技術＞
従来、チエツク弁付圧力制御弁としては第３図
に示すようなものが知られている（特開昭52−
67026号）。このチエツク弁付圧力制御弁は本体１
に形成した弁室２に、貫通孔３を有する円筒状の
スプール５を摺動自在に嵌合し、このスプール５
の前端面５ｂに対向してチエツク弁体としてのポ
ペツト６を配置している。上記スプール５の後端
側のバネ室７にはバネ８を縮装し、上記ポペツト
６の後端のバネ室１１にバネ１２を縮装するする
と共に、入口１３に通ずる１次室１５と上記バネ
室１１とを通路１６を介して連通している。上記
スプール５とポペツト６とは一直線上に配置され
ている。上記スプール５とポペツト６とはバネ
８，１２により互いに前端部を圧着させられてお
り、上記スプール５の進退動作によつてスプール
５とポペツト６との間が開閉して、入口１３の圧
力を制御する。上記出口１７から貫通孔３を通つ
て入口１３へ向けての流体の流れは貫通孔３に面
するポペツト６の前面に圧力が作用して、ポペツ
ト６が後退して出口１７から入口１３へ向けての
流れは自由流となる。<Prior art> Conventionally, a pressure control valve with a check valve as shown in FIG.
No. 67026). This pressure control valve with check valve has main body 1.
A cylindrical spool 5 having a through hole 3 is slidably fitted into the valve chamber 2 formed in the spool 5.
A poppet 6 as a check valve element is disposed opposite the front end surface 5b of the valve. A spring 8 is housed in the spring chamber 7 at the rear end of the spool 5, and a spring 12 is housed in the spring chamber 11 at the rear end of the poppet 6. It communicates with the spring chamber 11 via a passage 16. The spool 5 and the poppet 6 are arranged in a straight line. The front ends of the spool 5 and the poppet 6 are pressed against each other by springs 8 and 12, and the movement of the spool 5 back and forth opens and closes the space between the spool 5 and the poppet 6, thereby reducing the pressure at the inlet 13. Control. The flow of fluid from the outlet 17 to the inlet 13 through the through hole 3 is caused by pressure acting on the front surface of the poppet 6 facing the through hole 3, causing the poppet 6 to retreat and flow from the outlet 17 to the inlet 13. The flow becomes a free flow.
このように、このチエツク弁付圧力制御弁はス
プール５とポペツト６とを一直線上に配置して、
スプール５とポペツト６の互いに当接する部分を
弁座として利用しているので、構造が簡単で加工
が容易であるという利点を有する。 In this way, this pressure control valve with check valve arranges the spool 5 and poppet 6 in a straight line,
Since the mutually abutting portions of the spool 5 and the poppet 6 are used as the valve seat, it has the advantage of being simple in structure and easy to process.
ところで、圧力制御弁など弁類一般は、その弁
の各部から空気を完全に抜く必要がある。この空
気抜きが不十分であると、弁がチヤタリングを起
こす原因となる。 By the way, in general valves such as pressure control valves, it is necessary to completely remove air from each part of the valve. Insufficient air removal may cause the valve to chatter.
ところが、上記従来のチエツク弁付圧力制御弁
においては、スプール５の後端のバネ室７が袋小
路となつているため、バネ室７内の空気を抜くの
が困難であり、チヤタリングを起こす。また、上
記チエツク弁付圧力制御弁においては、スプール
５が後退すると、ポペツト６とスプール５の前端
内周円５ａとの間〓が急激に開き、スプール５の
軸方向の移動による貫通孔３内の圧力変化が大き
いため、この弁全体がチヤタリングを起こす。 However, in the conventional pressure control valve with a check valve, the spring chamber 7 at the rear end of the spool 5 is a dead end, so it is difficult to remove air from the spring chamber 7, which causes chattering. In addition, in the pressure control valve with a check valve, when the spool 5 retreats, the space between the poppet 6 and the inner circumferential circle 5a of the front end of the spool 5 suddenly opens, and the inside of the through hole 3 due to the axial movement of the spool 5. Due to large pressure changes, this valve as a whole causes chattering.
そこで、この考案の目的は、バネ室の空気を簡
単に抜くことができ、またスプールが軸方向に移
動してもスプール内の圧力が急激に変化すること
がなく、従つてチヤタリングの発生を防止できる
チエツク弁付圧力制御弁を提供することにある。 Therefore, the purpose of this invention was to make it possible to easily remove the air from the spring chamber, and to prevent the pressure inside the spool from changing suddenly even when the spool moves in the axial direction, thus preventing the occurrence of chattering. An object of the present invention is to provide a pressure control valve with a check valve that can be used.
＜問題点を解決するための手段＞
上記目的を達成するため、この考案の構成は、
第１図、第２図に例示するように、本体２１に形
成した弁室２３に摺動自在に嵌合され、前端面に
開口した軸心孔３２を有するスプール２２とポペ
ツト２５とを同軸上に対向させ、上記スプール２
２の後端側のバネ室３７にバネ３８を縮装する一
方、上記ポペツト２５の後端側のバネ室４８にバ
ネ４９を縮装すると共に入口２７を連通させ、上
記スプール２２の後端側のバネ３８と上記ポペツ
ト２５の後端側のバネ４９とにより、上記スプー
ル２２の前端の環状内縁部とポペツト２５の前部
を入口２７に通じる１次室２６において圧着し、
上記スプール２２の前面に作用する流体圧力によ
つて、上記スプール２２を進退作動させて入口２
７の流体圧力を制御する一方、出口２９に通じる
上記軸心孔３２に面する上記ポペツト２５の前面
に作用する流体圧力によつて、上記ポペツト２５
を後退させて、出口２９から入口２７への流れを
自由流れとするチエツク弁付圧力制御弁におい
て、上記スプール２２の後端のバネ室３７を、上
記スプール２２に形成した絞り４３を介して上記
軸心孔３２と、通路４５を介して出口２９とに
夫々連通し、さらに、上記軸心孔３２の前端部に
内周面が円筒面３２ａに、その円筒面３２ａに連
なる奥の内周面を上記ポペツト２５の円錐面２５
ａと同じ向きに傾斜した円錐面３２ｂに形成した
ことを特徴としている。<Means for solving the problem> In order to achieve the above purpose, the structure of this invention is as follows.
As illustrated in FIGS. 1 and 2, a spool 22 that is slidably fitted into a valve chamber 23 formed in a main body 21 and has an axial hole 32 opened on the front end surface and a poppet 25 are coaxially arranged. The above spool 2
A spring 38 is compressed in the spring chamber 37 on the rear end side of the poppet 25, and a spring 49 is compressed in the spring chamber 48 on the rear end side of the poppet 25, and the inlet 27 is communicated with the spring chamber 48 on the rear end side of the poppet 25. The annular inner edge of the front end of the spool 22 and the front part of the poppet 25 are pressed together in the primary chamber 26 communicating with the inlet 27 by the spring 38 and the spring 49 on the rear end side of the poppet 25,
The spool 22 is moved forward and backward by the fluid pressure acting on the front surface of the spool 22, and the inlet 22 is moved forward and backward.
7 while controlling the fluid pressure of the poppet 25 by the fluid pressure acting on the front surface of the poppet 25 facing the axial hole 32 leading to the outlet 29.
In this pressure control valve with a check valve, the flow from the outlet 29 to the inlet 27 is made to flow freely by retracting the spring chamber 37 at the rear end of the spool 22 through a throttle 43 formed in the spool 22. The axial hole 32 communicates with the outlet 29 via the passage 45, and furthermore, at the front end of the axial hole 32, the inner circumferential surface is a cylindrical surface 32a, and the inner circumferential surface at the back is connected to the cylindrical surface 32a. The conical surface 25 of the above poppet 25
It is characterized by being formed into a conical surface 32b inclined in the same direction as a.
＜作用＞
上記構成により、スプール２２の後端のバネ室
３７は絞り４３によつて軸心孔３２に連通すると
共に、通路４５によつて出口２９に連通してい
る。従つて、入口２７から軸心孔３２を通して出
口２９に流体を流すと、流体の一部は絞り４３を
通り、更にバネ室３７、通路４５を通つて出口２
９に向かつて流れ、バネ室３７が袋小路でなくな
り、バネ室３７を通つて流体を循環させることが
できるので、バネ室３７の空気抜きを簡単に行な
うことができる。流体を出口２９から入口２７へ
向けて流しても、同様に空気抜きができる。ただ
し、このときはチエツク弁体であるポペツト２５
が開いて自由流となる。また、上記軸心孔３２の
前端部の内周面が円筒面３２ａとなつており、さ
らにその円筒面３２ａに連なる奥の内周面がポペ
ツト２５の円錐面２５ａと同じ傾きに傾斜した円
錐面３２ｂに形成されているため、第２図に示す
ように、軸心孔３２の円錐面３２ｂとポペツト２
５の円錐面２５ａとで絞り部が形成される。そし
て、スプール２２が例えば軸方向にポペツト２５
に対して距離Ａだけ移動した場合に、上記絞り部
の間隔は上記距離Ａよりも少ない距離Ｂだけ増え
る。したがつて、間隔変化の小さな絞り部の絞り
効果によつて軸心孔３２内の急激な圧力変化が抑
制されてチヤタリングの発生が防止され、空気抜
きが完全に行なわれることと相俟つて、チヤタリ
ングの発生が完全に防止される。<Function> With the above configuration, the spring chamber 37 at the rear end of the spool 22 communicates with the shaft hole 32 through the throttle 43 and with the outlet 29 through the passage 45. Therefore, when fluid flows from the inlet 27 through the shaft hole 32 to the outlet 29, a portion of the fluid passes through the throttle 43, and further passes through the spring chamber 37 and the passage 45 to the outlet 29.
9, the spring chamber 37 is no longer a dead end, and the fluid can be circulated through the spring chamber 37, making it easy to vent air from the spring chamber 37. Air can be similarly vented by flowing the fluid from the outlet 29 toward the inlet 27. However, in this case, poppet 25, which is the check valve element,
opens and becomes a free stream. Further, the inner circumferential surface of the front end of the shaft hole 32 is a cylindrical surface 32a, and the inner circumferential surface at the back connected to the cylindrical surface 32a is a conical surface inclined at the same angle as the conical surface 25a of the poppet 25. 32b, as shown in FIG.
A constricted portion is formed by the conical surface 25a of No. 5. Then, the spool 22 is inserted into the poppet 25 in the axial direction, for example.
When moving by a distance A relative to the distance A, the interval between the aperture portions increases by a distance B, which is smaller than the distance A. Therefore, due to the throttling effect of the constricted portion with a small interval change, rapid pressure changes within the shaft center hole 32 are suppressed, and the occurrence of chattering is prevented, and the air is completely vented. occurrence is completely prevented.
＜実施例＞
以下、この考案を図示の実施例により詳細に説
明する。<Example> Hereinafter, this invention will be explained in detail with reference to illustrated examples.
第１図において、２１は本体、２２は本体２１
の弁室２３に摺動自在に嵌合したスプール、２５
は弁室２３にスプール２２と同軸にかつスプール
２２の前面に対向して配置したチエツク弁体とし
てのポペツト、２６は弁室２３の一部を拡大して
形成され、入口２７に通じる１次室、２８は弁室
２３の一部を拡大して形成され、出口２９に通じ
る２次室である。 In FIG. 1, 21 is the main body, 22 is the main body 21
A spool 25 slidably fitted into the valve chamber 23 of the
26 is a poppet as a check valve disposed in the valve chamber 23 coaxially with the spool 22 and facing the front surface of the spool 22; 26 is a primary chamber formed by enlarging a part of the valve chamber 23 and communicating with the inlet 27; , 28 are secondary chambers formed by enlarging a part of the valve chamber 23 and communicating with the outlet 29.
上記スプール２２には、前端面３１から軸心に
軸心孔３２を設けている。上記軸心孔３２の前端
部の内周面を円筒面３２ａにより形成し、さらに
その円筒面３２ａに連なる奥の部分を上記ポペツ
ト２５の前部の円錐面２５ａと平行な円錐面３２
ｂにより形成している。こうすることによつて、
第２図に示すように、上記軸心孔３２の円錐面３
２ｂと上記ポペツト２５の円錐面２５ａとで絞り
部が形成されるのである。したがつて、スプール
２２がポペツト２５に対して開いた際に、軸心孔
３２内の圧力は急激に変化しないのである。 The spool 22 is provided with an axial hole 32 extending from the front end surface 31 to the axial center. The inner circumferential surface of the front end of the axial hole 32 is formed by a cylindrical surface 32a, and the inner peripheral surface connected to the cylindrical surface 32a is formed by a conical surface 32 parallel to the conical surface 25a at the front of the poppet 25.
It is formed by b. By doing this,
As shown in FIG. 2, the conical surface 3 of the axial hole 32
2b and the conical surface 25a of the poppet 25 form a constricted portion. Therefore, when the spool 22 opens relative to the poppet 25, the pressure within the shaft hole 32 does not change suddenly.
上記軸心孔３２はスプール２２に互いに直交す
る方向に設けた貫通孔３４，３５によつて２次室
２８に連通している。上記スプール２２の後端面
３６側のバネ室３７にはバネ３８を縮装し、バネ
座３９を介してスプール２２を右方に向けて付勢
している。上記バネ３８の押圧力は本体２１に螺
合した調節ネジ４１のねじ込み量を調節すること
によつて調節できるようになつている。上記調節
ネジ４１の先端のピストン部４１ａとバネ室３７
の内周面との間はＯリング４２でシールしてい
る。 The axial hole 32 communicates with the secondary chamber 28 through through holes 34 and 35 provided in the spool 22 in directions perpendicular to each other. A spring 38 is compressed in a spring chamber 37 on the rear end surface 36 side of the spool 22, and urges the spool 22 rightward via a spring seat 39. The pressing force of the spring 38 can be adjusted by adjusting the screwing amount of an adjustment screw 41 screwed into the main body 21. The piston portion 41a at the tip of the adjustment screw 41 and the spring chamber 37
An O-ring 42 is used to seal between the inner circumferential surface and the inner peripheral surface.
一方、上記ポペツト２５の後端面４６と、本体
２１に螺合した盲蓋４７との間のバネ室４８には
バネ４９を縮装し、ポペツト２５を第１図中左
方、つまり、スプール２２の前端面３１に向けて
付勢して、ポペツトの環状内縁部３２ｃに向けて
円錐面２５ａを押し付けている。つまり、上記ス
プール２２とポペツト２５とは、バネ３８，４９
によつて１次室２６において互いに圧着させられ
ている。上記ポペツト２５の後端には係合フラン
ジ５１を設け、係合フランジ５１を本体２１に係
合させて、ポペツト２５が一定距離以上はスプー
ル２２側へ前進しないようにしている。上記バネ
室４８は１次室２６にポペツト２５に設けた通路
５０を介して連通している。 On the other hand, a spring 49 is installed in a spring chamber 48 between the rear end surface 46 of the poppet 25 and a blind cover 47 screwed onto the main body 21, and the poppet 25 is moved to the left in FIG. The conical surface 25a is pressed against the annular inner edge 32c of the poppet. In other words, the spool 22 and poppet 25 are connected to the springs 38, 49.
are pressed together in the primary chamber 26 by. An engaging flange 51 is provided at the rear end of the poppet 25, and the engaging flange 51 is engaged with the main body 21 to prevent the poppet 25 from advancing toward the spool 22 beyond a certain distance. The spring chamber 48 communicates with the primary chamber 26 via a passage 50 provided in the poppet 25.
上記構成において、バネ室３７の空気抜きを行
なう場合には、調節ネジ４１を緩めてバネ３８の
バネ力を弱め、この状態で入口２７から１次室２
６、軸心孔３２、孔３４，３５、２次室２８を通
して出口２９に向けて流体を供給する。そうする
と、１次室２６内の圧力がスプール２２の前端面
３１に作用してスプール２２は後退し、流体は１
次室２６から軸心孔３２を通り、一部は孔３４，
３５から出口２９へ向けて流れる一方、他の一部
は絞り４３を通つてバネ室３７に流入し、さらに
バネ室３７から通路４５を通つて出口２９へ流出
する。このように、絞り４３および通路４５を通
つてバネ室３７を経由する流体の流れができるの
で、バネ室３７内の空気は簡単に排出でき、空気
抜きが完全に行なわれる。従つて、チヤタリング
の発生が防止される。なお、出口２９から入口２
７に向けて流体を流しても同様に空気抜きができ
る。 In the above configuration, when air is to be vented from the spring chamber 37, the adjustment screw 41 is loosened to weaken the spring force of the spring 38.
6. Supply fluid toward the outlet 29 through the axial hole 32, the holes 34, 35, and the secondary chamber 28. Then, the pressure within the primary chamber 26 acts on the front end surface 31 of the spool 22, causing the spool 22 to retreat, and the fluid to be
Passing from the next chamber 26 through the axial hole 32, a part of it passes through the hole 34,
35 towards the outlet 29, while the other part flows into the spring chamber 37 through the throttle 43 and further flows out from the spring chamber 37 through the passage 45 to the outlet 29. In this way, the fluid can flow through the spring chamber 37 through the throttle 43 and the passage 45, so that the air in the spring chamber 37 can be easily discharged and the air can be completely vented. Therefore, occurrence of chattering is prevented. In addition, from exit 29 to entrance 2
Air can be removed in the same way by flowing fluid toward point 7.
次に、圧力制御を行なう場合には、調節ネジ４
１を所定量ねじ込んで、スプール２２の後端のバ
ネ３８のバネ力を所定の強さに設定する。そうす
ると、スプール２２の前端面３１に作用する１次
室２６の流体圧力がバネ３８のバネ力に打ち勝つ
と、スプール２２が後退し、それに伴つてポペツ
ト２５も前進するが、ポペツト２５の係合フラン
ジ５１が本体２１に係合し、ポペツト２５はそれ
以上前進しなくなる。従つて、ポペツト２５が追
従できる以上にスプール２２が後退すると、１次
室２６から軸心孔３２へ向けて流体が流れ、さら
に孔３４，３５を通つて出口２９に向けて流体が
流れる。このとき、スプール２２が第２図に示す
ように、二点鎖線の位置から距離Ａだけ後退する
と、それに対して軸心孔３２の円錐面３２ｂとポ
ペツト２５の円錐面２５ａとの間は距離Ｂだけ増
大する。つまり、ポペツト２５の円錐面２５ａと
軸心孔３２の円錐面３２ｂが同じ方向に傾斜して
いるため、上記軸心孔３２の円錐面３２ｂとポペ
ツト２５の円錐面２５ａとで形成された絞り部の
間隔Ｂはスプール２２の移動距離Ａよりも小さく
なる。従つて、開度変化がスプール２２の軸方向
への移動距離よりも小さな上記絞り部の絞り効果
によつて、チヤタリングの発生が防止される。 Next, when performing pressure control, adjust the adjustment screw 4.
1 by a predetermined amount to set the spring force of the spring 38 at the rear end of the spool 22 to a predetermined strength. Then, when the fluid pressure of the primary chamber 26 acting on the front end surface 31 of the spool 22 overcomes the spring force of the spring 38, the spool 22 retreats and the poppet 25 moves forward as well, but the engagement flange of the poppet 25 51 engages the main body 21, and the poppet 25 is no longer advanced. Therefore, when the spool 22 retreats more than the poppet 25 can follow, fluid flows from the primary chamber 26 toward the axial hole 32 and further through the holes 34 and 35 toward the outlet 29. At this time, when the spool 22 retreats by a distance A from the position indicated by the two-dot chain line as shown in FIG. only increases. That is, since the conical surface 25a of the poppet 25 and the conical surface 32b of the axial hole 32 are inclined in the same direction, the conical surface 32b of the axial hole 32 and the conical surface 25a of the poppet 25 form a constricted portion. The interval B is smaller than the moving distance A of the spool 22. Therefore, the occurrence of chattering is prevented by the throttling effect of the throttling portion, in which the opening change is smaller than the axial movement distance of the spool 22.
その際に、上記バネ室３７は通路４５を介して
出口２９に連通しているので、スプール２２をポ
ペツト２５側に付勢する流体圧は出口圧（低力
側）となる。そのために、流量が大きくなるとス
プール２２を反ポペツト側に付勢する流体圧とポ
ペツト側に付勢する流体圧との差が大きくなつ
て、スプール２２のストロークを大きくしようと
する。したがつて、オーバーライド特性がよくな
るという効果がある。これに対して、第３図に示
す従来例の場合には、スプール５をポペツト６側
に付勢する流体圧は貫通孔３内に圧力（高圧側）
である。そのために、流量が大きくなつてもスプ
ール５を反ポペツト側に付勢する流体圧とポペツ
ト側に付勢する流体圧との差は本実施例ほど大き
くはならないのである。 At this time, since the spring chamber 37 communicates with the outlet 29 through the passage 45, the fluid pressure that urges the spool 22 toward the poppet 25 becomes the outlet pressure (low force side). Therefore, when the flow rate increases, the difference between the fluid pressure that urges the spool 22 toward the opposite side of the poppet and the fluid pressure that urges the spool 22 toward the poppet increases, thereby increasing the stroke of the spool 22. Therefore, this has the effect of improving override characteristics. On the other hand, in the case of the conventional example shown in FIG.
It is. Therefore, even if the flow rate increases, the difference between the fluid pressure that biases the spool 5 toward the opposite poppet and the fluid pressure that biases the spool 5 toward the poppet does not become as large as in this embodiment.
次に、出口２９の流体圧力が入口２７の流体圧
力よりも高い場合には、この出口２９側の高圧の
流体がスプール２２の軸心孔３２に面するポペツ
ト２５の前面に作用して、ポペツト２５を後退さ
せ、出口２９から入口２７に向けての流れは自由
流となる。 Next, when the fluid pressure at the outlet 29 is higher than the fluid pressure at the inlet 27, the high-pressure fluid at the outlet 29 side acts on the front surface of the poppet 25 facing the axial hole 32 of the spool 22, causing the poppet to open. 25 is retracted, and the flow from the outlet 29 toward the inlet 27 becomes a free stream.
＜考案の効果＞
以上より明らかなように、この考案によれば、
スプールの後端のバネ室を絞りによつて軸心孔に
連通させると共に、通路によつて出口に連通させ
ているので、上記バネ室は袋小路ではなくなり、
バネ室を経由する流れを作ることができ、バネ室
内の空気を簡単に抜くことができ、従つて、チヤ
タリングの発生を防止できる。また、軸心孔前端
部の内周面を円筒面と円錐面とで形成し、この軸
心孔の内周面の円錐面をスプールの円錐面と同じ
向きに傾斜させて、開度変化がスプールの軸方向
への移動距離よりも小さい絞り部を形成したの
で、チヤタリングの発生が防止される。<Effects of the invention> As is clear from the above, according to this invention,
Since the spring chamber at the rear end of the spool is communicated with the shaft hole through the throttle and the outlet through the passage, the spring chamber is no longer a dead end;
A flow can be created through the spring chamber, the air in the spring chamber can be easily removed, and the occurrence of chattering can therefore be prevented. In addition, the inner peripheral surface of the front end of the shaft center hole is formed with a cylindrical surface and a conical surface, and the conical surface of the inner peripheral surface of the shaft center hole is inclined in the same direction as the conical surface of the spool, so that the opening degree changes. Since the constricted portion is formed to be smaller than the axial movement distance of the spool, chattering is prevented from occurring.
第１図はこの考案の一実施例のチエツク弁付圧
力制御弁の断面図、第２図は第１図の軸心孔先端
部の拡大説明図、第３図は従来のチエツク弁付圧
力制御弁の断面図である。
２１……本体、２２……スプール、２３……弁
室、２５……ポペツト、２５ａ，３２ｂ……円錐
面、３２……軸心孔、３２ａ……円筒面、３７，
４８……バネ室、３８，４９……バネ、４３……
絞り、４５……通路。
Fig. 1 is a sectional view of a pressure control valve with a check valve according to an embodiment of this invention, Fig. 2 is an enlarged explanatory view of the tip of the shaft center hole in Fig. 1, and Fig. 3 is a conventional pressure control valve with a check valve. FIG. 3 is a cross-sectional view of the valve. 21... Main body, 22... Spool, 23... Valve chamber, 25... Poppet, 25a, 32b... Conical surface, 32... Axial hole, 32a... Cylindrical surface, 37,
48... Spring chamber, 38, 49... Spring, 43...
Aperture, 45...Aisle.
Claims (1)
され、前端面に開口した軸心孔３２を有するスプ
ール２２とポペツト２５とを同軸上に対向させ、
上記スプール２２の後端側のバネ室３７にバネ３
８を縮装する一方、上記ポペツト２５の後端側の
バネ室４８にバネ４９を縮装すると共に入口２７
を連通させ、上記スプール２２の後端側のバネ３
８と上記ポペツト２５の後端側のバネ４９とによ
り、上記スプール２２の前端の環状内縁部とポペ
ツト２５の前部を入口２７に通じる１次室２６に
おいて圧着し、上記スプール２２の前面に作用す
る流体圧力によつて、上記スプール２２を進退作
動させて入口２７の流体圧力を制御する一方、出
口２９に通じる上記軸心孔３２に面する上記ポペ
ツト２５の前面に作用する流体圧力によつて、上
記ポペツト２５を後退させて、出口２９から入口
２７への流れを自由流れとするチエツク弁付圧力
制御弁において、 上記スプール２２の後端のバネ室３７を、上記
スプール２２に形成した絞り４３を介して上記軸
心孔３２と、通路４５を介して出口２９とに夫々
連通し、さらに、上記軸心孔３２の前端部の内周
面が円筒面３２ａで、その円筒面３２ａに連なる
奥の内周面が上記ポペツト２５の円錐面２５ａと
同じ向きに傾斜した円錐面３２ｂに形成されてい
ることを特徴とするチエツク弁付圧力制御弁。[Claims for Utility Model Registration] A poppet 25 is coaxially opposed to a spool 22 which is slidably fitted into a valve chamber 23 formed in a main body 21 and has an axial hole 32 opened at the front end surface,
A spring 3 is installed in a spring chamber 37 on the rear end side of the spool 22.
8 is compressed, a spring 49 is compressed in the spring chamber 48 on the rear end side of the poppet 25, and the inlet 27 is compressed.
the spring 3 on the rear end side of the spool 22.
8 and the spring 49 on the rear end side of the poppet 25 press the annular inner edge of the front end of the spool 22 and the front part of the poppet 25 in the primary chamber 26 communicating with the inlet 27, and act on the front surface of the spool 22. The fluid pressure at the inlet 27 is controlled by moving the spool 22 forward and backward, while the fluid pressure acting on the front surface of the poppet 25 facing the axial hole 32 leading to the outlet 29 controls the fluid pressure at the inlet 27. , a pressure control valve with a check valve that allows the flow from the outlet 29 to the inlet 27 to be a free flow by retracting the poppet 25; The axial hole 32 communicates with the outlet 29 through the passage 45, and furthermore, the inner circumferential surface of the front end of the axial hole 32 is a cylindrical surface 32a, and the inner peripheral surface of the axial hole 32 is connected to the cylindrical surface 32a. A pressure control valve with a check valve, characterized in that an inner circumferential surface of the poppet 25 is formed as a conical surface 32b inclined in the same direction as the conical surface 25a of the poppet 25.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985166195U JPH0419267Y2 (en) | 1985-10-28 | 1985-10-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985166195U JPH0419267Y2 (en) | 1985-10-28 | 1985-10-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6273174U JPS6273174U (en) | 1987-05-11 |
| JPH0419267Y2 true JPH0419267Y2 (en) | 1992-04-30 |
Family
ID=31096933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985166195U Expired JPH0419267Y2 (en) | 1985-10-28 | 1985-10-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0419267Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53150933U (en) * | 1977-05-06 | 1978-11-28 |
-
1985
- 1985-10-28 JP JP1985166195U patent/JPH0419267Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6273174U (en) | 1987-05-11 |
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