JP2815964B2 - Relief valve device - Google Patents
Relief valve deviceInfo
- Publication number
- JP2815964B2 JP2815964B2 JP6472190A JP6472190A JP2815964B2 JP 2815964 B2 JP2815964 B2 JP 2815964B2 JP 6472190 A JP6472190 A JP 6472190A JP 6472190 A JP6472190 A JP 6472190A JP 2815964 B2 JP2815964 B2 JP 2815964B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- receiving portion
- pressure receiving
- stage operation
- pressure
- 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
- Safety Valves (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、大形のたて形機械プレスあるいは横形の水
平機械プレス等において、過大な荷重が発生したとき
に、機械系に過大な力が作用するのを防止するため、シ
リンダ−内高圧流体を急速に系外に排出する逃し弁装置
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a large vertical machine press, a horizontal horizontal machine press, or the like, which applies an excessive force to a mechanical system when an excessive load is generated. The present invention relates to a relief valve device for rapidly discharging high-pressure fluid in a cylinder to the outside of the system in order to prevent the action of the pressure relief valve.
［従来の技術］ プレス機械等で過大負荷が発生したとき、機械の損傷
を防ぐために、プレス機械を作動させている圧油又は圧
力水等の圧力流体の外部に放出して、機械系に過大な負
荷が生ずるのを防止している。[Prior art] When an excessive load occurs in a press machine or the like, in order to prevent damage to the machine, the pressurized oil or water that is operating the press machine is discharged to the outside of the pressurized fluid and excessively applied to the mechanical system. It prevents the occurrence of a heavy load.
このような過大な負荷が生ずるのを防止するため従来
は、第５図、第６図に示すような弁装置が使用されてい
た。Conventionally, a valve device as shown in FIGS. 5 and 6 has been used to prevent such an excessive load from occurring.
第５図の装置では、弁体ａの圧力入口ｇより流入した
圧油又は圧力水等の圧力流体はスプリングｅの力に対応
しており、圧力入口ｇの流体圧力が上昇するとポペット
弁ｃがスプリングｅの力に抗して上昇し、排出ポートｈ
より圧力流体を排出して圧力入口ｇの流体圧力を規定値
に保つようにしている。スプリングｅの力は、圧力調整
ハンドルｄによって調整することができるようになって
いる。In the apparatus shown in FIG. 5, the pressure fluid such as pressure oil or pressure water flowing from the pressure inlet g of the valve body a corresponds to the force of the spring e. When the fluid pressure at the pressure inlet g increases, the poppet valve c is activated. Ascends against the force of the spring e and discharge port h
The pressure fluid is discharged more to keep the fluid pressure at the pressure inlet g at a specified value. The force of the spring e can be adjusted by a pressure adjustment handle d.
第６図の装置では、弁体ａの圧力入口ｇより流入した
圧力流体は、スプリングｅの力と、スプリング室ｉにか
かる圧力との合力に対応している。圧力入口ｇの流体圧
力が上昇してパイロット弁ｂが圧力調整スプリングｆの
力に抗して作動すると、力のバランスがくずれてポペッ
ト弁ｃが上昇し、圧力入口ｇの圧力流体は排出ポートｈ
から排出される。パイロット弁ｂの圧力調整スプリング
ｆの力は、圧力調整ハンドルｄによって調整することが
できるようになっている。In the apparatus shown in FIG. 6, the pressure fluid flowing from the pressure inlet g of the valve element a corresponds to the resultant force of the force of the spring e and the pressure applied to the spring chamber i. When the fluid pressure at the pressure inlet g rises and the pilot valve b operates against the force of the pressure adjusting spring f, the force balance is lost and the poppet valve c rises, and the pressure fluid at the pressure inlet g is discharged to the discharge port h.
Is discharged from The force of the pressure adjusting spring f of the pilot valve b can be adjusted by a pressure adjusting handle d.
［発明が解決しようとする課題］ 上述した従来の装置は、吐出容量が小容量の弁である
ため、多量の圧力流体を排出する必要がある場合には、
第５図、第６図に示した弁装置を並列に複数個使用する
必要があった。[Problems to be Solved by the Invention] The above-described conventional device is a valve having a small discharge capacity, and therefore, when a large amount of pressure fluid needs to be discharged,
It was necessary to use a plurality of valve devices shown in FIGS. 5 and 6 in parallel.
ところが複数の弁装置を使用すると、次のような問題
があった。However, using a plurality of valve devices has the following problems.
（ｉ） 複数個の弁が同時に瞬時に開くことは不可能で
あり、設定圧力を同一にすることも困難であった。(I) It is impossible to simultaneously open a plurality of valves instantaneously, and it is also difficult to make the set pressure the same.
（ii） 圧力流体のリーク量が増大する。(Ii) The leak amount of the pressure fluid increases.
（iii） 取付スペースが大きくなる。(Iii) Installation space is increased.
（iv） 応答性が比較的遅い。(Iv) Responsiveness is relatively slow.
（ｖ） 圧力オーバーライドが大きい（特に第５図の装
置において）。(V) Large pressure override (especially in the device of FIG. 5).
本発明はこのような従来の問題点を解決し、１個の弁
で多量の圧力流体を排出することができ、応答性がよ
く、圧力オーバーライドが小さく、リーク量の少ない逃
し弁装置を提供することを目的とするものである。The present invention solves such a conventional problem, and provides a relief valve device that can discharge a large amount of pressure fluid with one valve, has good responsiveness, has small pressure override, and has a small leak amount. The purpose is to do so.
［課題を解決するための手段］ 本発明の逃し弁装置は、ポペット弁８と、該ポペット
弁８の前面の圧力流体が導入される受圧部３と、前記ポ
ペット弁８の背面のパイロット受圧部５と、前記ポペッ
ト弁８が前記パイロット受圧部５側に移動したとき前記
受圧部３に連通する排出ポート９と、前記ポペット弁８
を前記受圧部３側に付勢するスプリング４とを有する主
弁１と、 ポペット弁12と、該ポペット弁12の前面の受圧部10
と、前記ポペット弁12の背面のパイロット受圧部17と、
前記ポペット弁12が前記パイロット受圧部17側に移動し
たとき前記受圧部10に連通する排出ポート14と、前記ポ
ペット弁12を前記受圧部10側に付勢するスプリング11
と、 ピストン弁25と、該ピストン弁25の前面の受圧部27
と、前記ピストン弁25の背面の背圧室28と、前記ピスト
ン弁25が前記背圧室28側に移動したとき前記背圧室28に
連通する排出ポート23と、前記ピストン弁25を前記受圧
部27側に付勢する付勢力調整可能なスプリング43とを有
する２段目操作弁30と、 前記主弁１の受圧部３と前記主弁１のパイロット受圧
部５とを、該パイロット受圧部５の方への流体を許容し
前記受圧部３の方への流体の流れを阻止するチェック弁
22を介して連通する通路18と、 前記１段目操作弁29の受圧部10と前記主弁１のパイロ
ット受圧部５とを連通する通路19と、 前記１段目操作弁29のパイロット受圧部17と前記主弁
１のパイロット受圧部５とチェック弁22との間の通路18
とをオリフィス15を介して連通する通路16と、 前記２段目操作弁30の受圧部27と前記主弁１の受圧部
３とを、前記２段目操作弁30の方への流体の流れを許容
し前記主弁１の方への流体の流れを阻止するチェック弁
21を介して連通する通路20と、 を備えたことを特徴とするもの及びポペット弁８と、該
ポペット弁８の前面の圧力流体が導入される受圧部３
と、前記ポペット弁８の背面のパイロット受圧部５と、
前記ポペット弁８が前記パイロット受圧部５側に移動し
たとき前記受圧部３に連通する排出ポート９と、前記ポ
ペット弁８を前記受圧部３側に付勢するスプリング４と
を有する主弁１と、 ポペット弁12と、該ポペット弁12の前面の受圧部10
と、前記ポペット弁12の背面のパイロット受圧部17と、
前記ポペット弁12が前記パイロット受圧部17側に移動し
たとき前記受圧部10に連通する排出ポート14と、前記ポ
ペット弁12を前記受圧部10側に付勢するスプリング11と
を有する１段目操作弁29と、 ピストン弁25と、該ピストン弁25の前面の受圧部27
と、前記ピストン弁25の背面の背圧室28及びパイロット
受圧部41と、前記ピストン弁25が背圧室28側に移動した
とき前記背圧室28に連通する排出ポート23と、前記ピス
トン弁25を前記受圧部27側に付勢するスプリング43とを
有する２段目操作弁30と、 ポペット弁52と、該ポペット弁52の前面の受圧部56
と、前記ポペット弁52が受圧部56から後退したとき前記
受圧部56と連通する排出ポート50と、前記ポペット弁52
を前記受圧部56側に付勢する付勢力調整可能なスプリン
グ53とを有する３段目操作弁55と、 前記主弁１の受圧部３と前記主弁１のパイロット受圧
部５とを、該パイロット受圧部５の方への流体の流れを
許容し前記受圧部３の方への流体の流れを阻止するチェ
ック弁22を有し且つ該チェック弁22よりパイロット受圧
部５側にオリフィス49を有して連通する通路18と、 前記１段目操作弁29の受圧部10と前記主弁１のパイロ
ット受圧部５とを連通する通路19と、 前記１段目操作弁29のパイロット受圧部17と前記通路
18におけるチェック弁22とオリフィス49の間とをオリフ
ィス15を介して連通する通路16と、 前記１段目操作弁29のパイロット受圧部17を前記２段
目操作弁30の背圧室28に連通する通路26と、 前記２段目操作弁30の受圧部27と前記主弁１の受圧部
３とを、前記２段目操作弁30の方への流体の流れを許容
し前記主弁１の方への流体の流れを阻止するチェック弁
21とオリフィス48を介して連通する通路20と、 前記２段目操作弁30のパイロット受圧部41と前記３段
目操作弁55の受圧部56とを連通する通路44と、 前記２段目操作弁30のパイロット受圧部41と前記１段
目操作弁29のパイロット受圧部17とをオリフィス46を介
して連通する通路40と、 前記３段目操作弁55の受圧部56と前記通路18における
チェック弁22とオリフィス49の間とをオリフィス47を介
して連通する通路45と、を備えたことを特徴とするもの
である。Means for Solving the Problems A relief valve device according to the present invention includes a poppet valve 8, a pressure receiving portion 3 on the front surface of the poppet valve 8 into which a pressure fluid is introduced, and a pilot pressure receiving portion on the back surface of the poppet valve 8. 5, a discharge port 9 communicating with the pressure receiving portion 3 when the poppet valve 8 moves toward the pilot pressure receiving portion 5;
, A main valve 1 having a spring 4 for urging the pressure receiving portion 3 toward the pressure receiving portion 3, a poppet valve 12, and a pressure receiving portion 10 on a front surface of the poppet valve 12.
A pilot pressure receiving portion 17 on the back of the poppet valve 12,
A discharge port 14 communicating with the pressure receiving portion 10 when the poppet valve 12 moves to the pilot pressure receiving portion 17 side, and a spring 11 for urging the poppet valve 12 toward the pressure receiving portion 10
A piston valve 25, and a pressure receiving portion 27 on the front surface of the piston valve 25.
A back pressure chamber 28 on the back of the piston valve 25; a discharge port 23 communicating with the back pressure chamber 28 when the piston valve 25 moves toward the back pressure chamber 28; A second-stage operation valve 30 having a biasing force-adjustable spring 43 for biasing the portion 27; a pressure receiving portion 3 of the main valve 1 and a pilot pressure receiving portion 5 of the main valve 1; Check valve for allowing fluid to the direction 5 and preventing the flow of the fluid to the pressure receiving portion 3
A passage 18 communicating with the pressure receiving portion 10 of the first-stage operation valve 29 and the pilot pressure receiving portion 5 of the main valve 1; a pilot pressure receiving portion of the first-stage operation valve 29; 17 and a passage 18 between the pilot pressure receiving portion 5 of the main valve 1 and the check valve 22
And a pressure receiving portion 27 of the second-stage operation valve 30 and a pressure-receiving portion 3 of the main valve 1 through an orifice 15 for fluid flow toward the second-stage operation valve 30. Check valve that permits flow and prevents fluid flow toward the main valve 1
A poppet valve 8, and a pressure receiving portion 3 in front of the poppet valve 8, into which a pressure fluid is introduced.
A pilot pressure receiving portion 5 on the back of the poppet valve 8;
A main valve 1 having a discharge port 9 communicating with the pressure receiving portion 3 when the poppet valve 8 moves toward the pilot pressure receiving portion 5 and a spring 4 for urging the poppet valve 8 toward the pressure receiving portion 3; A poppet valve 12 and a pressure receiving portion 10 on the front face of the poppet valve 12
A pilot pressure receiving portion 17 on the back of the poppet valve 12,
First-stage operation including a discharge port 14 that communicates with the pressure receiving portion 10 when the poppet valve 12 moves to the pilot pressure receiving portion 17 side, and a spring 11 that biases the poppet valve 12 toward the pressure receiving portion 10 A valve 29, a piston valve 25, and a pressure receiving portion 27 on the front surface of the piston valve 25.
A back pressure chamber 28 and a pilot pressure receiving portion 41 on the back of the piston valve 25; a discharge port 23 communicating with the back pressure chamber 28 when the piston valve 25 moves to the back pressure chamber 28; A second-stage operation valve 30 having a spring 43 for urging the valve 25 toward the pressure receiving portion 27; a poppet valve 52; and a pressure receiving portion 56 on the front surface of the poppet valve 52.
A discharge port 50 that communicates with the pressure receiving portion 56 when the poppet valve 52 retreats from the pressure receiving portion 56;
A third-stage operating valve 55 having a biasing force adjustable spring 53 for biasing the pressure receiving portion 56 toward the pressure receiving portion 56; a pressure receiving portion 3 of the main valve 1 and a pilot pressure receiving portion 5 of the main valve 1; It has a check valve 22 that allows the flow of fluid toward the pilot pressure receiving section 5 and prevents the flow of fluid toward the pressure receiving section 3, and has an orifice 49 on the pilot pressure receiving section 5 side from the check valve 22. A passage 18 communicating the pressure receiving portion 10 of the first-stage operation valve 29 and the pilot pressure receiving portion 5 of the main valve 1; a pilot pressure receiving portion 17 of the first-stage operation valve 29; The passage
A passage 16 that communicates between the check valve 22 and the orifice 49 at 18 through the orifice 15, and a pilot pressure receiving portion 17 of the first-stage operation valve 29 communicates with a back pressure chamber 28 of the second-stage operation valve 30. The passage 26, the pressure receiving portion 27 of the second-stage operation valve 30 and the pressure-receiving portion 3 of the main valve 1 are connected to each other so as to allow the fluid to flow toward the second-stage operation valve 30. Check valve that blocks fluid flow to
A passage 20 communicating with the pressure-receiving portion 21 of the second-stage operation valve 30 and a pressure-receiving portion 56 of the third-stage operation valve 55; A passage 40 for communicating a pilot pressure receiving portion 41 of the valve 30 with the pilot pressure receiving portion 17 of the first-stage operation valve 29 via an orifice 46; and a check in the pressure-receiving portion 56 of the third-stage operation valve 55 and the passage 18 And a passage 45 that communicates between the valve 22 and the orifice 49 via the orifice 47.
［作用］ 主弁１の受圧部３の流体圧力が上昇すると２段目操作
弁30のピストン弁25が上昇して２段目操作弁30の背圧室
28と１段目操作弁29のパイロット受圧部17が大気へ排出
され、１段目操作弁29の受圧部10と主弁１のパイロット
受圧部５が大気に排出されて主弁１のポペット弁８が作
動し、主弁１の受圧部３が大気に排出される。[Operation] When the fluid pressure of the pressure receiving portion 3 of the main valve 1 rises, the piston valve 25 of the second-stage operation valve 30 rises and the back pressure chamber of the second-stage operation valve 30.
28 and the pilot pressure receiving portion 17 of the first-stage operation valve 29 are discharged to the atmosphere, the pressure receiving portion 10 of the first-stage operation valve 29 and the pilot pressure receiving portion 5 of the main valve 1 are discharged to the atmosphere, and the poppet valve of the main valve 1 is discharged. 8 operates, and the pressure receiving portion 3 of the main valve 1 is discharged to the atmosphere.
３段目操作弁55を設けた請求項２の発明においては、
主弁１の受圧部３の流体圧力が上昇すると、先ず３段目
操作弁55のポペット弁52が作動して２段目操作弁30のピ
ストン弁25を上昇させ、以下、上記と同じ作動をする。In the invention of claim 2 in which the third-stage operation valve 55 is provided,
When the fluid pressure of the pressure receiving portion 3 of the main valve 1 rises, first, the poppet valve 52 of the third-stage operation valve 55 is operated to raise the piston valve 25 of the second-stage operation valve 30, and the same operation as described above is performed. I do.
［実 施 例］ 以下、本発明の実施例について説明する。[Examples] Examples of the present invention will be described below.
第１図は請求項１の発明の第１の実施例であって、主
弁１にはシート７が固定されており、このシート７に密
着かつ摺動可能なポペット弁８及びステム２が設けてあ
って、ポペット弁８はスプリング４によりシート７に押
付けられている。FIG. 1 shows a first embodiment of the first aspect of the present invention, in which a seat 7 is fixed to a main valve 1, and a poppet valve 8 and a stem 2 which can be closely and slidably attached to the seat 7 are provided. The poppet valve 8 is pressed against the seat 7 by the spring 4.
プレス機械等を作動させる圧油又は圧力水等の圧力流
体は主弁１の受圧部３に作用し、ポペット弁８が開くと
排出ポート９より圧力流体を大気に放出するようになっ
ている。A pressurized fluid such as pressurized oil or pressurized water that operates a press machine or the like acts on the pressure receiving portion 3 of the main valve 1, and releases the pressurized fluid from the discharge port 9 to the atmosphere when the poppet valve 8 is opened.
29は１段目操作弁、30は２段目操作弁であって、１段
目操作弁29のボディーには１段目操作弁29、２段目操作
弁30を操作するためのオリフィス15を含んだ通路16が設
けてあって、１段目操作弁29は図示しないボルトにより
主弁１のボディーに締結されており、また２段目操作弁
30も図示しないボルトによって１段目操作弁29のボディ
ーに締結されていて、主弁１と１段目操作弁29と２段目
操作弁30とは一体に結合されている。29 is a first-stage operation valve, 30 is a second-stage operation valve, and the body of the first-stage operation valve 29 has an orifice 15 for operating the first-stage operation valve 29 and the second-stage operation valve 30. A first stage operating valve 29 is fastened to the body of the main valve 1 by a bolt (not shown), and a second stage operating valve 29 is provided.
30 is also fastened to the body of the first-stage operation valve 29 by a bolt (not shown), and the main valve 1, the first-stage operation valve 29, and the second-stage operation valve 30 are integrally connected.
主弁１のポペット弁８の前面は、プレス機械等の作動
流体等の圧力流体が導入される受圧部３になっており、
ポペット弁８の背面はパイロット受圧部５になってい
て、受圧部３とパイロット受圧部５とは、パイロット受
圧部５側への流体の流れは許容するが、受圧部３側への
流体の流れを阻止するチェック弁22と通路18とによって
連通されている。The front surface of the poppet valve 8 of the main valve 1 is a pressure receiving unit 3 into which a pressure fluid such as a working fluid of a press machine is introduced.
The rear face of the poppet valve 8 is a pilot pressure receiving section 5, and the pressure receiving section 3 and the pilot pressure receiving section 5 allow the flow of the fluid to the pilot pressure receiving section 5, but the flow of the fluid to the pressure receiving section 3 side. And the passage 18 communicates with the check valve 22 for blocking the pressure.
１段目操作弁29は、シート13と、ポペット弁12と、ス
プリング11とによって構成されており、スプリング11は
ポペット弁12を前面の受圧部10の方に付勢している。ポ
ペット弁12の前面の受圧部10は、通路19によって主弁１
のパイロット受圧部５に連通している。またポペット弁
12の背面のパイロット受圧部17は、オリフィス15と、１
段目操作弁29の方への流体の流れは許容するが主弁１の
方への流体の流れを阻止するチェック弁22と通路16とに
よって、主弁１の受圧部３と連通している。The first-stage operation valve 29 includes the seat 13, the poppet valve 12, and the spring 11, and the spring 11 urges the poppet valve 12 toward the pressure receiving portion 10 on the front surface. The pressure receiving part 10 on the front of the poppet valve 12 is connected to the main valve 1 by a passage 19.
The pilot pressure receiving unit 5 of the first embodiment is in communication with the second pilot receiving unit 5. Also poppet valve
The pilot pressure receiving portion 17 on the rear side of the orifice 15
The check valve 22 and the passage 16 which allow the flow of the fluid to the stage control valve 29 but prevent the flow of the fluid to the main valve 1 communicate with the pressure receiving portion 3 of the main valve 1. .
２段目操作弁30は、シート24と、ピストン弁25と、ス
プリング43と、スプリング43の力を調整するセット圧調
整ネジ42とによって構成されており、スプリング43はピ
ストン弁25を前面の受圧部27側に付勢している。ピスト
ン弁25の前面の受圧部27は、通路20及び２段目操作弁30
の方への流体の流れは許容するが主弁１の方への流体の
流れを阻止するチェック弁21を介して、主弁１の受圧部
３と連通している。The second-stage operation valve 30 includes a seat 24, a piston valve 25, a spring 43, and a set pressure adjusting screw 42 for adjusting the force of the spring 43. It is urged to the part 27 side. The pressure receiving portion 27 on the front surface of the piston valve 25 includes the passage 20 and the second-stage operation valve 30.
Is connected to the pressure receiving portion 3 of the main valve 1 through a check valve 21 which allows the flow of fluid toward the main valve 1 but prevents the flow of fluid toward the main valve 1.
主弁１の逃し圧力の設定は、２段目操作弁30のセット
圧調整ネジ42により行なう。この設定値以下の流体圧力
が主弁１の受圧部３に作用しているときは、主弁１並び
に１段目操作弁29、２段目操作弁30の全てが閉止状態
で、リークゼロを保持し続ける。The relief pressure of the main valve 1 is set by the set pressure adjusting screw 42 of the second-stage operation valve 30. When a fluid pressure equal to or less than the set value is acting on the pressure receiving portion 3 of the main valve 1, the main valve 1, the first-stage operation valve 29, and the second-stage operation valve 30 are all closed, and zero leakage is maintained. Keep doing.
主弁１の受圧部３に設定圧力以上の流体圧力が作用す
ると、この流体圧力は、チェック弁22を開き、通路20を
通って２段目操作弁30の受圧部27に作用する。そしてこ
の流体圧力がスプリング43の力に抗してピストン弁25を
上昇させ、ピストン弁25の背面の背圧室28を排出ポート
23に通じて大気に開放する。受圧部27に圧力流体が作用
すると、チェック弁21の効果で一旦上昇したピストン弁
25はすぐには下降しないため、通路26を通って１段目操
作弁29のパイロット受圧部17の圧力流体は排出ポート23
から大気に放出される。このため１段目操作弁29のポペ
ット弁12は第１図の左方に移動し、受圧部10の圧力流体
は排出ポート14から大気に放出される。次いで通路９を
通って主弁１のパイロット受圧部５の圧力流体は排出ポ
ート14から大気に放出されることになり、主弁１のポペ
ット弁８は全開して受圧部３の圧力流体は排出ポート９
により大気に放出される。このときオリフィス15はパイ
ロット受圧部17への圧力流体の供給を規則し、２段目操
作弁30のピストン弁25が上昇したときに、１段目操作弁
29のポペット弁12が左方へ移動するのを促進する役割を
果たす。When a fluid pressure equal to or greater than the set pressure acts on the pressure receiving portion 3 of the main valve 1, the fluid pressure opens the check valve 22, passes through the passage 20, and acts on the pressure receiving portion 27 of the second-stage operation valve 30. This fluid pressure raises the piston valve 25 against the force of the spring 43, and discharges the back pressure chamber 28 on the back of the piston valve 25 to the discharge port.
Open to atmosphere through 23. When the pressure fluid acts on the pressure receiving portion 27, the piston valve once rises due to the effect of the check valve 21.
Since the pressure of the pilot pressure receiving portion 17 of the first-stage operation valve 29 passes through the passage 26,
Released into the atmosphere from Therefore, the poppet valve 12 of the first-stage operation valve 29 moves to the left in FIG. 1, and the pressure fluid of the pressure receiving section 10 is discharged from the discharge port 14 to the atmosphere. Next, the pressure fluid of the pilot pressure receiving portion 5 of the main valve 1 is discharged to the atmosphere from the discharge port 14 through the passage 9, the poppet valve 8 of the main valve 1 is fully opened, and the pressure fluid of the pressure receiving portion 3 is discharged. Port 9
Is released to the atmosphere. At this time, the orifice 15 regulates the supply of the pressurized fluid to the pilot pressure receiving portion 17, and when the piston valve 25 of the second-stage operation valve 30 rises, the first-stage operation valve
The 29 poppet valve 12 serves to facilitate the movement to the left.
主弁１の受圧部３の圧力が低下すると、２段目操作弁
30、１段目操作弁29、次いで主弁１と順次閉止状態とな
り、元の状態に自動的に復帰する。When the pressure of the pressure receiving portion 3 of the main valve 1 decreases, the second-stage operation valve
30, the first-stage operation valve 29 and then the main valve 1 are sequentially closed, and automatically return to the original state.
主弁１及び１段目操作弁29のパイロット受圧部5,17側
に設けてあるスプリング4,11は、各ポペット弁8,12を閉
止する目的の力だけを有するように設計されているの
で、基本的には受圧部3,10とパイロット受圧部5,17の圧
力による力のバランスがくずれて、パイロット受圧部5,
17の圧力が低下すると、スプリング4,11の力に抗するこ
となくポペット弁8,12が開くので、圧力流体が排出され
るときの流体抵抗のみが存在し、これが圧力オーバーラ
イドとなり、小さく保持される。The springs 4 and 11 provided on the pilot pressure receiving portions 5 and 17 of the main valve 1 and the first-stage operation valve 29 are designed so as to have only a force for closing the poppet valves 8 and 12, respectively. However, basically, the pressure balance between the pressures of the pressure receiving units 3, 10 and the pilot pressure receiving units 5, 17 is lost, and the pilot pressure receiving units 5, 10,
As the pressure of 17 drops, the poppet valves 8, 12 open without opposing the forces of the springs 4, 11, so there is only fluid resistance when the pressurized fluid is drained, which becomes a pressure override and is kept small. You.
以上説明した第１図の実施例において、主弁１の受圧
部３に復元した圧力が発生すると、チェック弁21,22及
び通路16,19,20,26を介して主弁１のパイロット受圧部
５、１段目操作弁29の受圧部10、パイロット受圧部17、
２段目操作弁30の受圧部27、背圧室28にも圧力流体が流
入し、主弁１、１段目操作弁29、２段目操作弁30は圧力
バランス状態に達し、閉止状態となる。In the embodiment of FIG. 1 described above, when the restored pressure is generated in the pressure receiving portion 3 of the main valve 1, the pilot pressure receiving portion of the main valve 1 is transmitted through the check valves 21, 22 and the passages 16, 19, 20, 26. 5, the pressure receiving portion 10 of the first-stage operation valve 29, the pilot pressure receiving portion 17,
The pressure fluid also flows into the pressure receiving portion 27 and the back pressure chamber 28 of the second-stage operation valve 30, and the main valve 1, the first-stage operation valve 29, and the second-stage operation valve 30 reach a pressure balanced state, and are closed. Become.
第２図は請求項１の発明の第２の実施例であって、第
１図の実施例と同一部分には同一符号を付してある。FIG. 2 shows a second embodiment of the invention of claim 1, and the same parts as those in the embodiment of FIG. 1 are denoted by the same reference numerals.
第２図の実施例では、主弁１の受圧部３側に過負荷防
止シリンダー６を接続し、プレス作業を行なうたびに、
衝撃力により、過負荷防止シリンダーのヘッド側に繰り
返しで、かつ、早いサイクルの衝撃圧力が発生するよう
にしたものである。この場合、過負荷防止シリンダー６
が、シリンダー内に封入された流体の圧縮による定常荷
重の範囲での沈み込み量を小さくするために、過負荷防
止シリンダー６に予圧をかけておく。また主弁１のパイ
ロット受圧部５、１段目操作弁29の受圧部10、パイロッ
ト受圧部17、２段目操作弁30の受圧部27、背圧室28に、
上記予圧に＋αを付加した圧力を封入しておく。In the embodiment shown in FIG. 2, an overload prevention cylinder 6 is connected to the pressure receiving portion 3 side of the main valve 1, and each time a press operation is performed,
The impact force repeatedly and quickly generates an impact pressure on the head side of the overload prevention cylinder due to the impact force. In this case, the overload prevention cylinder 6
However, a preload is applied to the overload prevention cylinder 6 in order to reduce the amount of sinking in the range of a steady load due to the compression of the fluid sealed in the cylinder. The pilot pressure receiving portion 5 of the main valve 1, the pressure receiving portion 10 of the first-stage operation valve 29, the pilot pressure receiving portion 17, the pressure-receiving portion 27 of the second-stage operation valve 30, and the back pressure chamber 28
A pressure obtained by adding + α to the preload is sealed.
このような圧力を外部から導入するため、電磁方向切
換弁38、減圧弁34、シーケンス弁33、パイロットチェッ
ク弁35,36を使用している。37は圧力計、39は電磁作動
部を示す。In order to introduce such pressure from the outside, an electromagnetic direction switching valve 38, a pressure reducing valve 34, a sequence valve 33, and pilot check valves 35 and 36 are used. 37 indicates a pressure gauge, and 39 indicates an electromagnetic operation unit.
最初に電磁方向切換弁38を第２図の右方に移動し、通
路31を通じてパイロット受圧部5,17、受圧部10,27、背
圧室28に圧力を導入し、規定値に達すると、シーケンス
弁33の作動で通路32を通って過負荷防止シリンダー６及
び主弁１の受圧部３に圧力が発生し始め、以後、パイロ
ット受圧部5,17、受圧部10,27、背圧室28と主弁１の受
圧部３の双方が圧力上昇を続け、パイロット受圧部5,1
7、背圧室28は予圧＋αの圧力、主弁１の受圧部３は規
定の予圧値に達し、ポペット弁８は閉止状態となる。First, the electromagnetic directional control valve 38 is moved to the right in FIG. 2, and pressure is introduced into the pilot pressure receiving portions 5, 17, the pressure receiving portions 10, 27, and the back pressure chamber 28 through the passage 31, and when the pressure reaches the specified value, By the operation of the sequence valve 33, pressure starts to be generated in the overload prevention cylinder 6 and the pressure receiving portion 3 of the main valve 1 through the passage 32, and thereafter, the pilot pressure receiving portions 5, 17, the pressure receiving portions 10, 27, the back pressure chamber 28 And the pressure receiving section 3 of the main valve 1 continue to increase the pressure, and the pilot pressure receiving sections 5, 1
7. The back pressure chamber 28 reaches the pre-pressure + α, the pressure receiving portion 3 of the main valve 1 reaches the specified pre-load value, and the poppet valve 8 is closed.
第３図は請求項２の発明の第１の実施例であって、主
弁１にはシート７が固定されており、このシート７に密
着かつ摺動可能なポペット弁８及びステム２が設けてあ
って、ポペット弁８はスプリング４によりシート７に押
付けられている。FIG. 3 shows a first embodiment of the second aspect of the present invention, in which a seat 7 is fixed to the main valve 1, and a poppet valve 8 and a stem 2 which can be closely and slidably attached to the seat 7 are provided. The poppet valve 8 is pressed against the seat 7 by the spring 4.
プレス機械等を作動させる圧油又は圧力水等の圧力流
体は主弁１の受圧部３に作用し、ポペット弁８が開くと
排出ポート９より圧力流体を大気に放出するようになっ
ている。A pressurized fluid such as pressurized oil or pressurized water that operates a press machine or the like acts on the pressure receiving portion 3 of the main valve 1, and releases the pressurized fluid from the discharge port 9 to the atmosphere when the poppet valve 8 is opened.
29は１段目操作弁、30は２段目操作弁、55は３段目操
作弁であって、１段目操作弁29のボディーには、２段目
操作弁30、３段目操作弁55を操作するためのオリフィス
15を含んだ通路16、通路26、オリフィス46を含んだ通路
40、オリフィス47を含んだ通路45が設けてあって、１段
目操作弁29は図示しないボルトにより主弁１のボディー
に締結されており、２段目操作弁30、３段目操作弁55は
図示しないボルトにより１段目操作弁29のボディーに締
結されていて、主弁１、１段目操作弁29、２段目操作弁
30、３段目操作弁55は一体に結合されている。29 is a first-stage control valve, 30 is a second-stage control valve, 55 is a third-stage control valve, and the body of the first-stage control valve 29 has a second-stage control valve 30, a third-stage control valve. Orifice for operating 55
Passage 16, including passage 15, passage 26, and passage including orifice 46
40, a passage 45 including an orifice 47 is provided, and the first-stage operation valve 29 is fastened to the body of the main valve 1 by a bolt (not shown), and the second-stage operation valve 30, the third-stage operation valve 55 Is connected to the body of the first-stage operation valve 29 by a bolt (not shown), and the main valve 1, the first-stage operation valve 29, the second-stage operation valve
The third and third stage operation valves 55 are integrally connected.
主弁１のポペット弁８の前面は、プレス機械等の作動
流体が導入される受圧部３になっており、ポペット弁８
の背面はパイロット受圧部５になっていて、受圧部３と
パイロット受圧部５とは、パイロット受圧部５側への流
体の流れを阻止するチェック弁22、オリフィス49と通路
18とによって連通されている。The front surface of the poppet valve 8 of the main valve 1 is a pressure receiving section 3 into which a working fluid such as a press machine is introduced.
The rear face of the pressure receiving section 5 is a pilot pressure receiving section 5, and the pressure receiving section 3 and the pilot pressure receiving section 5 are connected to a check valve 22, an orifice 49 and a passage for preventing the flow of fluid to the pilot pressure receiving section 5 side.
It is communicated by 18.
１段目操作弁29は、シート13と、ポペット弁12と、ス
プリング11とによって構成されており、スプリング11は
ポペット弁12を前面の受圧部10の方に付勢している。ポ
ペット弁12の前面の受圧部10は、通路19によって主弁１
のパイロット受圧部５に連通している。またポペット弁
12の背面のパイロット受圧部17は、オリフィス15と、１
段目操作弁29の方への流体の流れは許容するが、主弁１
の方への流体の流れを阻止するチェック弁22と通路16と
によって、主弁１の受圧部３と連通している。The first-stage operation valve 29 includes the seat 13, the poppet valve 12, and the spring 11, and the spring 11 urges the poppet valve 12 toward the pressure receiving portion 10 on the front surface. The pressure receiving part 10 on the front of the poppet valve 12 is connected to the main valve 1 by a passage 19.
The pilot pressure receiving unit 5 of the first embodiment is in communication with the second pilot receiving unit 5. Also poppet valve
The pilot pressure receiving portion 17 on the rear side of the orifice 15
Fluid flow to the stage control valve 29 is allowed, but the main valve 1
A check valve 22 and a passage 16 for preventing the flow of fluid toward the main valve 1 communicate with the pressure receiving portion 3 of the main valve 1.
２段目操作弁30は、シート24と、ピストン弁25と、ス
プリング43とによって構成されており、スプリング43は
ピストン弁25を前面の受圧部27側に付勢している。ピス
トン弁25の前面の受圧部27は、通路20及び２段目操作弁
30の方への流体の流れは許容するが主弁１の方への流体
の流れを阻止する２個のチェック弁21,22及びオリフィ
ス48を介して、主弁１の受圧部３と連通している。２段
目操作弁30のピストン弁25の背面にあるパイロット受圧
部41は、通路40,44によって３段目操作弁55の受圧部56
に連通すると共に、通路40からオリフィス46、通路26を
介して１段目操作弁29のパイロット受圧部17に通じてお
り、ピストン弁25の背圧室28も通路26を介して１段目操
作弁29のパイロット受圧部17に連通している。The second-stage operation valve 30 includes a seat 24, a piston valve 25, and a spring 43, and the spring 43 biases the piston valve 25 toward the pressure receiving portion 27 on the front surface. The pressure receiving portion 27 on the front surface of the piston valve 25 includes the passage 20 and the second-stage operation valve.
It communicates with the pressure receiving part 3 of the main valve 1 through two check valves 21 and 22 and an orifice 48 which allow the flow of the fluid to 30 but prevent the flow of the fluid to the main valve 1. ing. The pilot pressure receiving portion 41 on the back of the piston valve 25 of the second-stage operation valve 30 is connected to the pressure-receiving portion 56 of the third-stage operation valve 55 by passages 40 and 44.
And the passage 40 communicates with the pilot pressure receiving portion 17 of the first-stage operation valve 29 through the orifice 46 and the passage 26, and the back pressure chamber 28 of the piston valve 25 also operates through the passage 26 in the first stage. It communicates with the pilot pressure receiving portion 17 of the valve 29.
３段目操作弁55は、シート51、ポペット弁52、スプリ
ング53、スプリング53の力を調整するセット圧調整ネジ
54によって構成されており、受圧部56は、通路44、オリ
フィス47、通路45、チェック弁22を介して主弁１の受圧
部３につながっている。The third stage operation valve 55 is a set pressure adjusting screw for adjusting the force of the seat 51, the poppet valve 52, the spring 53, and the spring 53.
The pressure receiving portion 56 is connected to the pressure receiving portion 3 of the main valve 1 via the passage 44, the orifice 47, the passage 45, and the check valve 22.
主弁１の逃し圧力の設定は、３段目操作弁55のセット
圧調整ネジ54により行なう。この設定値以下の流体圧力
が主弁１の受圧部に作用しているときは、主弁１並びに
１段目操作弁29、２段目操作弁30、３段目操作弁55の全
てが閉止状態でリークゼロを保持し続ける。The relief pressure of the main valve 1 is set by the set pressure adjusting screw 54 of the third-stage operation valve 55. When a fluid pressure equal to or less than the set value is acting on the pressure receiving portion of the main valve 1, all of the main valve 1, the first-stage operation valve 29, the second-stage operation valve 30, and the third-stage operation valve 55 are closed. Continue to maintain zero leak in the state.
主弁１の受圧部３に設定圧力以上の流体圧力が作用す
ると、この流体圧力はチェック弁22を開き、通路45、オ
リフィス47、通路44を通って３段目操作弁55の受圧部56
に作用する。そしてこの流体圧力がスプリング53の力に
抗してポペット弁52を開き、圧力流体を排出ポート50に
通じて大気に開放する。次いで、通路40,44を通じて２
段目操作弁30のパイロット受圧部41の圧力が低下し、受
圧部27の圧力が勝ってピストン弁25が上昇し、背圧室28
は排出ポート23から大気に開放される。受圧部27に通じ
ている通路20にあるチェック弁21の作用でピストン弁25
は上昇したままの状態を保持する。更に通路26を通じて
１段目操作弁29のパイロット受圧部17の圧力が低下し、
ポペット弁12が開いて受圧部10の圧力流体が排出ポート
14より大気に開放される。When a fluid pressure equal to or higher than the set pressure acts on the pressure receiving portion 3 of the main valve 1, the fluid pressure opens the check valve 22, passes through the passage 45, the orifice 47, and the passage 44, and pressurizes the pressure receiving portion 56 of the third-stage operation valve 55.
Act on. This fluid pressure opens the poppet valve 52 against the force of the spring 53, and releases the pressure fluid to the atmosphere through the discharge port 50. Then, through passages 40 and 44,
The pressure of the pilot pressure receiving portion 41 of the stage control valve 30 decreases, the pressure of the pressure receiving portion 27 wins, the piston valve 25 rises, and the back pressure chamber 28
Is released from the discharge port 23 to the atmosphere. The piston valve 25 is operated by the action of the check valve 21 in the passage 20 communicating with the pressure receiving portion 27.
Keeps the state of rising. Further, the pressure of the pilot pressure receiving portion 17 of the first-stage operation valve 29 decreases through the passage 26,
The poppet valve 12 opens and the pressure fluid in the pressure receiving part 10 is discharged
Open to the atmosphere from 14.
このようにして、通路19を通り主弁１のパイロット受
圧部５の圧力流体も排気ポート14より大気に開放される
こととなって主弁１のポペット弁８は全開して受圧部３
の圧力流体は排出ポート９より大気に開放される。In this way, the pressure fluid in the pilot pressure receiving portion 5 of the main valve 1 is also released to the atmosphere from the exhaust port 14 through the passage 19, and the poppet valve 8 of the main valve 1 is fully opened and the pressure receiving portion 3
Is released from the discharge port 9 to the atmosphere.
オリフィス15,46,47は、３段目操作弁55が開いたと
き、パイロット受圧部17,41の圧力流体の供給を規制
し、パイロット受圧部17,41の圧力低下の効果を促進す
る役割を果たす。またオリフィス48は、２段目操作弁30
の受圧部27への圧力流体の流入量を規制し、ピストン弁
25の上昇速度を規制すると同時に、ポペット弁８が全開
するまでの時間を規制する役割を果たす。The orifices 15, 46, 47 regulate the supply of the pressure fluid to the pilot pressure receiving portions 17, 41 when the third-stage operation valve 55 is opened, and promote the effect of reducing the pressure of the pilot pressure receiving portions 17, 41. Fulfill. And the orifice 48 is the second-stage operation valve 30
Regulates the amount of pressurized fluid flowing into the pressure receiving portion 27 of the piston valve.
At the same time as regulating the ascending speed of 25, it serves to regulate the time until the poppet valve 8 is fully opened.
以上説明した第３図の実施例において、主弁１の受圧
部３に復元した圧力が発生すると、チエック弁22と通路
16,18,19,20,26,40,44,45を通じて、主弁１のパイロッ
ト受圧部５、１段目操作弁29の受圧部10、パイロット受
圧部17、２段目操作弁30の受圧部27、背圧部28、パイロ
ット受圧部41、３段目操作弁55の受圧部56にも圧力流体
が流入し、主弁１、１段目操作弁29、２段目操作弁30、
３段目操作弁55は圧力バランス状態に達し、閉止状態と
なる。In the embodiment of FIG. 3 described above, when the restored pressure is generated in the pressure receiving portion 3 of the main valve 1, the check valve 22 and the passage
The pilot pressure receiving portion 5 of the main valve 1, the pressure receiving portion 10 of the first-stage operation valve 29, the pilot pressure receiving portion 17, and the pressure reception of the second-stage operation valve 30 through 16, 18, 19, 20, 26, 40, 44, and 45 The pressure fluid also flows into the pressure receiving portion 56 of the portion 27, the back pressure portion 28, the pilot pressure receiving portion 41, and the third stage operation valve 55, and the main valve 1, the first stage operation valve 29, the second stage operation valve 30,
The third-stage operation valve 55 reaches a pressure balanced state and is closed.
第４図は請求項２の発明の第２の実施例であって、第
３図の実施例と同一部分には同一符号を付してある。FIG. 4 shows a second embodiment of the second aspect of the present invention, in which the same parts as those in the embodiment of FIG.
第４図の実施例では、主弁１の受圧部３側に過負荷防
止シリンダー６を接続し、プレス作業を行なうたびに、
衝撃力により過負荷防止シリンダー６のヘッド側に繰り
返しで、かつ、早いサイクルの衝撃圧力が発生するよう
にしたものである。この場合、過負荷防止シリンダー６
が、シリンダー内に封入された流体の圧縮による定常負
荷の範囲での沈み込み量を小さくするために、過負荷防
止シリンダー６に予圧をかけておく。また主弁１のパイ
ロット受圧部５、１段目操作弁29の受圧部10、パイロッ
ト受圧部17、２段目操作弁30の受圧部27、背圧室28に、
上記予圧に＋αを付加した圧力を封入しておく。In the embodiment shown in FIG. 4, an overload prevention cylinder 6 is connected to the pressure receiving portion 3 side of the main valve 1, and each time a press operation is performed,
An impact force is repeatedly and rapidly generated on the head side of the overload prevention cylinder 6 by an impact force. In this case, the overload prevention cylinder 6
However, a preload is applied to the overload prevention cylinder 6 in order to reduce the amount of sinking in the range of the steady load due to the compression of the fluid sealed in the cylinder. The pilot pressure receiving portion 5 of the main valve 1, the pressure receiving portion 10 of the first-stage operation valve 29, the pilot pressure receiving portion 17, the pressure-receiving portion 27 of the second-stage operation valve 30, and the back pressure chamber 28
A pressure obtained by adding + α to the preload is sealed.
このような圧力を外部から導入するため、電磁方向切
換弁38、減圧弁34、シーケンス弁33、パイロットチェッ
ク弁35,36を使用している。In order to introduce such pressure from the outside, an electromagnetic direction switching valve 38, a pressure reducing valve 34, a sequence valve 33, and pilot check valves 35 and 36 are used.
最初に電磁方向切換弁38を第４図の右方に移動し、通
路31を通じてパイロット受圧部5,17、受圧部10,27、背
圧室28に圧力を導入し、規定値に達すると、シーケンス
弁33の作動で通路32を通って過負荷防止シリンダー６及
び主弁１の受圧部３に圧力が発生し始め、以後パイロッ
ト受圧部5,17、受圧部10,27、背圧室28と主弁１の受圧
部３の双方が圧力上昇を続け、パイロット受圧部5,17、
背圧室28は予圧＋αの圧力、主弁１の受圧部３は規定の
予圧に達し、ポペット弁８は閉止状態となる。First, the electromagnetic directional control valve 38 is moved rightward in FIG. 4, and pressure is introduced into the pilot pressure receiving portions 5, 17, the pressure receiving portions 10, 27, and the back pressure chamber 28 through the passage 31, and when the specified value is reached, By the operation of the sequence valve 33, pressure starts to be generated in the overload prevention cylinder 6 and the pressure receiving portion 3 of the main valve 1 through the passage 32, and thereafter, the pilot pressure receiving portions 5, 17, the pressure receiving portions 10, 27, the back pressure chamber 28 and Both the pressure receiving sections 3 of the main valve 1 continue to increase the pressure, and the pilot pressure receiving sections 5, 17,
The back pressure chamber 28 reaches the pre-pressure + α, the pressure receiving portion 3 of the main valve 1 reaches the specified pre-pressure, and the poppet valve 8 is closed.
［発明の効果］ 請求項１の発明は、２段目操作弁をピストン式の直動
弁としたことと受圧部の通路にチェック弁を配したこと
により、一度開くとその開状態が比較的長時間保持され
るので、オリフィスの効果と相まって、１段目操作弁が
瞬時に開き、主弁も１段目操作弁とほぼ同時に開とな
る。[Effects of the Invention] The invention of claim 1 is that the second-stage operation valve is a piston-type direct-acting valve and a check valve is arranged in the passage of the pressure receiving portion, so that once opened, the open state is relatively small. The first-stage operation valve is instantaneously opened in combination with the effect of the orifice because it is held for a long time, and the main valve is also opened almost simultaneously with the first-stage operation valve.
主弁のパイロット受圧部が開放状態となることから、
主弁の受圧部に働く圧力、流量に応じて主弁のポペット
弁は全開となる。Since the pilot pressure receiving part of the main valve is open,
The poppet valve of the main valve is fully opened according to the pressure and flow rate acting on the pressure receiving portion of the main valve.
請求項２の発明は、３段目操作弁の小量の逃し量、圧
力低下をオリフィスの効果を使って２段目操作弁の開動
作を瞬時に行なわせ、かつ開状態を保持することから、
１段目操作弁のパイロット受圧部が大気開放状態とな
り、従って主弁のパイロット受圧部も無負荷状態とな
り、主弁受圧部の流量、圧力に応じて主弁のポペット弁
は全開となる。According to a second aspect of the present invention, the opening operation of the second-stage operation valve is instantaneously performed by using the effect of the orifice to reduce the amount of relief and the pressure drop of the third-stage operation valve, and the open state is maintained. ,
The pilot pressure receiving portion of the first-stage operation valve is open to the atmosphere, so that the pilot pressure receiving portion of the main valve is also in a no-load state, and the poppet valve of the main valve is fully opened according to the flow rate and pressure of the main valve pressure receiving portion.
従って本発明は、次のような効果がある。 Therefore, the present invention has the following effects.
（ｉ） １台の逃し弁で大流量の圧力流体を逃して機械
系に過大な荷重が発生するのを防止する。(I) A large relief flow of pressure fluid is released by one relief valve to prevent an excessive load from being generated in the mechanical system.
（ii） 応答が非常に早い。(Ii) Very quick response.
（iii） 圧力オーバーライドが非常に小さい。(Iii) Pressure override is very small.
（iv） 小形で取付スペースが小さくてすみ、従って過
負荷防止シリンダー等の過大圧力発生源に直付けできる
ので、配管系による作動遅れもなくなる。(Iv) Since it is small and requires only a small mounting space, and can be directly attached to an excessive pressure generating source such as an overload prevention cylinder, there is no operation delay due to the piping system.
（ｖ） 主弁及び各操作弁のいずれからも漏れがなく、
装置全体として流体の漏れがない。(V) There is no leakage from both the main valve and each operating valve,
There is no fluid leakage as a whole device.
第１図は請求項１の発明の第１の実施例の系統図、第２
図は請求項１の発明の第２の実施例の系統図、第３図は
請求項２の発明の第１の実施例の系統図、第４図は請求
項２の発明の第２の実施例の系統図、第５図、第６図は
従来装置の断面図である。 図中、１は主弁、３は受圧部、４はスプリング、５はパ
イロット受圧部、８はポペット弁、９は排出ポート、10
は受圧部、11はスプリング、12はポペット弁、14は排出
ポート、15はオリフィス、16は通路、17はパイロット受
圧部、18,19,20は通路、21,22はチェック弁、23は排出
ポート、25はピストン弁、26は通路、27は受圧部、28は
背圧室、29は１段目操作弁、30は２段目操作弁、40は通
路、41はパイロット受圧部、42はセット圧調整ネジ、43
はスプリング、44は通路、46,47,48,49はオリフィス、5
0は排出ポート、52はポペット弁、53はスプリング、54
はセット圧調整ネジ、55は３段目操作弁、56は受圧部を
示す。FIG. 1 is a system diagram of a first embodiment of the present invention, and FIG.
FIG. 3 is a system diagram of the second embodiment of the first embodiment of the present invention, FIG. 3 is a system diagram of the first embodiment of the second embodiment of the present invention, and FIG. 4 is a second embodiment of the second embodiment of the present invention. FIGS. 5 and 6 are sectional views of a conventional apparatus. In the figure, 1 is a main valve, 3 is a pressure receiving part, 4 is a spring, 5 is a pilot pressure receiving part, 8 is a poppet valve, 9 is a discharge port, 10
Is a pressure receiving portion, 11 is a spring, 12 is a poppet valve, 14 is a discharge port, 15 is an orifice, 16 is a passage, 17 is a pilot pressure receiving portion, 18, 19, and 20 are passages, 21 and 22 are check valves, and 23 is a discharge valve. Port, 25 is a piston valve, 26 is a passage, 27 is a pressure receiving part, 28 is a back pressure chamber, 29 is a first stage operating valve, 30 is a second stage operating valve, 40 is a passage, 41 is a pilot pressure receiving portion, 42 is Set pressure adjusting screw, 43
Is a spring, 44 is a passage, 46, 47, 48, 49 is an orifice, 5
0 is a discharge port, 52 is a poppet valve, 53 is a spring, 54
Denotes a set pressure adjusting screw, 55 denotes a third-stage operation valve, and 56 denotes a pressure receiving portion.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 豊永 正一 千葉県千葉市今井２―13―14 豊産マシ ナリー株式会社内 (56)参考文献 実開 昭63−125267（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) F16K 17/10──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shoichi Toyonaga 2-17-14 Imai, Chiba City, Chiba Prefecture Inside Toyohashi Machinery Co., Ltd. (56) References Japanese Utility Model 1988-125267 (JP, U) (58) ) Surveyed field (Int.Cl. 6 , DB name) F16K 17/10
Claims (2)
力流体が導入される受圧部３と、前記ポペット弁８の背
面のパイロット受圧部５と、前記ポペット弁８が前記パ
イロット受圧部５側に移動したとき前記受圧部３に連通
する排出ポート９と、前記ポペット弁８を前記受圧部３
側に付勢するスプリング４とを有する主弁１と、 ポペット弁12と、該ポペット弁12の前面の受圧部10と、
前記ポペット弁12の背面のパイロット受圧部17と、前記
ポペット弁12が前記パイロット受圧部17側に移動したと
き前記受圧部10に連通する排出ポート14と、前記ポペッ
ト弁12を前記受圧部10側に付勢するスプリング11とを有
する１段目操作弁29と、 ピストン弁25と、該ピストン弁25の前面の受圧部27と、
前記ピストン弁25の背面の背圧室28と、前記ピストン弁
25が前記背圧室28側に移動したとき前記背圧室28に連通
する排出ポート23と、前記ピストン弁25を前記受圧部27
側に付勢する付勢力調整可能なスプリング43とを有する
２段目操作弁30と、 前記主弁１の受圧部３と前記主弁１のパイロット受圧部
５とを、該パイロット受圧部５の方への流体の流れを許
容し前記受圧部３の方への流体の流れを阻止するチェッ
ク弁22を介して連通する通路18と、 前記１段目操作弁29の受圧部10と前記主弁１のパイロッ
ト受圧部５とを連通する通路19と、 前記１段目操作弁29のパイロット受圧部17と前記主弁１
のパイロット受圧部５とチェック弁22との間の通路18と
をオリフィス15を介して連通する通路16と、 前記２段目操作弁30の受圧部27と前記主弁１の受圧部３
とを、前記２段目操作弁30の方への流体の流れを許容し
前記主弁１の方への流体の流れを阻止するチェック弁21
を介して連通する通路20と、 を備えたことを特徴とする逃し弁装置。1. A poppet valve 8, a pressure receiving portion 3 in front of the poppet valve into which a pressure fluid is introduced, a pilot pressure receiving portion 5 on a back surface of the poppet valve 8, and the poppet valve 8 is connected to the pilot pressure receiving portion 5. The discharge port 9 communicating with the pressure receiving portion 3 when the pressure receiving portion 3 is moved to the
A main valve 1 having a spring 4 biased to the side, a poppet valve 12, a pressure receiving portion 10 on a front surface of the poppet valve 12,
A pilot pressure receiving portion 17 on the back surface of the poppet valve 12, a discharge port 14 communicating with the pressure receiving portion 10 when the poppet valve 12 moves to the pilot pressure receiving portion 17 side, and the poppet valve 12 is connected to the pressure receiving portion 10 side. A first-stage operation valve 29 having a spring 11 biasing the piston valve 25, a piston valve 25, and a pressure receiving portion 27 on a front surface of the piston valve 25;
A back pressure chamber 28 on the back of the piston valve 25;
When the valve 25 moves to the back pressure chamber 28 side, the discharge port 23 communicating with the back pressure chamber 28 and the piston valve 25
A second-stage operation valve 30 having a biasing force-adjustable spring 43 biased to the side; a pressure receiving portion 3 of the main valve 1 and a pilot pressure receiving portion 5 of the main valve 1; A passage 18 communicating through a check valve 22 for permitting the flow of fluid toward the flow direction and preventing the flow of fluid toward the pressure receiving portion 3; the pressure receiving portion 10 of the first-stage operation valve 29; A passage 19 communicating with the first pilot pressure receiving portion 5; a pilot pressure receiving portion 17 of the first-stage operation valve 29;
A passage 16 that communicates a passage 18 between the pilot pressure receiving portion 5 and the check valve 22 through an orifice 15; a pressure receiving portion 27 of the second-stage operation valve 30; and a pressure receiving portion 3 of the main valve 1.
And a check valve 21 that allows the flow of fluid toward the second-stage operation valve 30 and blocks the flow of fluid toward the main valve 1.
A relief valve device, comprising: a passage 20 that communicates through
圧力流体が導入される受圧部３と、前記ポペット弁８の
背面のパイロット受圧部５と、前記ポペット弁８が前記
パイロット受圧部５側に移動したとき前記受圧部３に連
通する排出ポート９と、前記ポペット弁８を前記受圧部
３側に付勢するスプリング４とを有する主弁１と、 ポペット弁12と、該ポペット弁12の前面の受圧部10と、
前記ポペット弁12の背面のパイロット受圧部17と、前記
ポペット弁12が前記パイロット受圧部17側に移動したと
き前記受圧部10に連通する排出ポート14と、前記ポペッ
ト弁12を前記受圧部10側に付勢するスプリング11とを有
する１段目操作弁29と、 ピストン弁25と、該ピストン弁25の前面の受圧部27と、
前記ピストン弁25の背面の背圧室28及びパイロット受圧
部41と、前記ピストン弁25が背圧室28側に移動したとき
前記背圧室28に連通する排出ポート23と、前記ピストン
弁25を前記受圧部27側に付勢するスプリング43とを有す
る２段目操作弁30と、 ポペット弁52と、該ポペット弁52の前面の受圧部56と、
前記ポペット弁52が前記受圧部56から後退したとき前記
受圧部56と連通する排出ポート50と、前記ポペット弁52
を前記受圧部56側に付勢する付勢力調整可能なスプリン
グ53とを有する３段目操作弁55と、 前記主弁１の受圧部３と前記主弁１のパイロット受圧部
５とを、該パイロット受圧部５の方へ流体の流れを許容
し前記受圧部３の方への流体の流れを阻止するチェック
弁22を有し且つ該チェック弁22よりパイロット受圧部５
側にオリフィス49を有して連通する通路18と、 前記１段目操作弁29の受圧部10と前記主弁１のパイロッ
ト受圧部５とを連通する通路19と、 前記１段目操作弁29のパイロット受圧部17と前記通路18
におけるチェック弁22とオリフィス49の間とをオリフィ
ス15を介して連通する通路16と、 前記１段目操作弁29のパイロット受圧部17を前記２段目
操作弁30の背圧室28に連通する通路26と、 前記２段目操作弁30の受圧部27と前記主弁１の受圧部３
とを、前記２段目操作弁30の方への流体の流れを許容し
前記主弁１の方への流体の流れを阻止するチェック弁21
とオリフィス48を介して連通する通路20と、 前記２段目操作弁30のパイロット受圧部41と前記３段目
操作弁55の受圧部56とを連通する通路44と、 前記２段目操作弁30のパイロット受圧部41と前記１段目
操作弁29のパイロット受圧部17とをオリフィス46を介し
て連通する通路40と、 前記３段目操作弁55の受圧部56と前記通路18におけるチ
ェック弁22とオリフィス49と間とをオリフィス47を介し
て連通する通路45と、を備えたことを特徴とする逃し弁
装置。2. A poppet valve 8, a pressure receiving portion 3 on the front surface of the poppet valve 8 into which a pressure fluid is introduced, a pilot pressure receiving portion 5 on a rear surface of the poppet valve 8, and the poppet valve 8 is connected to the pilot pressure receiving portion. A main valve 1 having a discharge port 9 communicating with the pressure receiving portion 3 when moved to the pressure receiving portion 3 and a spring 4 for urging the poppet valve 8 toward the pressure receiving portion 3; a poppet valve 12; A pressure receiving section 10 on the front of the 12,
A pilot pressure receiving portion 17 on the back surface of the poppet valve 12, a discharge port 14 communicating with the pressure receiving portion 10 when the poppet valve 12 moves to the pilot pressure receiving portion 17 side, and the poppet valve 12 is connected to the pressure receiving portion 10 side. A first-stage operation valve 29 having a spring 11 biasing the piston valve 25, a piston valve 25, and a pressure receiving portion 27 on a front surface of the piston valve 25;
A back pressure chamber 28 and a pilot pressure receiving portion 41 on the back of the piston valve 25, a discharge port 23 communicating with the back pressure chamber 28 when the piston valve 25 moves to the back pressure chamber 28 side, and the piston valve 25. A second-stage operation valve 30 having a spring 43 biased to the pressure receiving portion 27 side, a poppet valve 52, and a pressure receiving portion 56 on a front surface of the poppet valve 52;
A discharge port 50 that communicates with the pressure receiving portion 56 when the poppet valve 52 retracts from the pressure receiving portion 56;
A third-stage operating valve 55 having a biasing force adjustable spring 53 for biasing the pressure receiving portion 56 toward the pressure receiving portion 56; a pressure receiving portion 3 of the main valve 1 and a pilot pressure receiving portion 5 of the main valve 1; A check valve 22 for allowing a fluid flow toward the pilot pressure receiving portion 5 and preventing a fluid flow toward the pressure receiving portion 3;
A passage 18 having an orifice 49 on the side thereof and communicating therewith; a passage 19 communicating the pressure receiving portion 10 of the first-stage operation valve 29 with the pilot pressure receiving portion 5 of the main valve 1; Pilot pressure receiving part 17 and passage 18
And a passage 16 for communicating between the check valve 22 and the orifice 49 through the orifice 15, and a pilot pressure receiving portion 17 of the first-stage operation valve 29 to a back-pressure chamber 28 of the second-stage operation valve 30. A passage 26, a pressure receiving portion 27 of the second-stage operation valve 30, and a pressure receiving portion 3 of the main valve 1;
And a check valve 21 that allows the flow of fluid toward the second-stage operation valve 30 and blocks the flow of fluid toward the main valve 1.
A passage 20 communicating with a pressure receiving portion 41 of the second-stage operation valve 30 and a pressure receiving portion 56 of the third-stage operation valve 55; and a second passage valve communicating with the second-stage operation valve. A passage 40 for connecting the pilot pressure receiving portion 41 of the 30 and the pilot pressure receiving portion 17 of the first-stage operation valve 29 via an orifice 46; a pressure-receiving portion 56 of the third-stage operation valve 55 and a check valve in the passage 18 A relief valve device comprising: a passage 45 communicating between the orifice 47 and the orifice 49 via an orifice 47.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6472190A JP2815964B2 (en) | 1990-03-15 | 1990-03-15 | Relief valve device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6472190A JP2815964B2 (en) | 1990-03-15 | 1990-03-15 | Relief valve device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03265770A JPH03265770A (en) | 1991-11-26 |
| JP2815964B2 true JP2815964B2 (en) | 1998-10-27 |
Family
ID=13266304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6472190A Expired - Fee Related JP2815964B2 (en) | 1990-03-15 | 1990-03-15 | Relief valve device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2815964B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102352874B (en) * | 2011-10-31 | 2013-12-25 | 浙江大学 | Digital pure water hydraulic proportional overflow valve |
| JP6068203B2 (en) * | 2013-03-07 | 2017-01-25 | 豊興工業株式会社 | Pressure control valve |
| EP3680067B1 (en) | 2017-12-07 | 2021-10-06 | Maxell Izumi Co., Ltd. | Electrically powered tool |
-
1990
- 1990-03-15 JP JP6472190A patent/JP2815964B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03265770A (en) | 1991-11-26 |
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