JPH024835B2 - - Google Patents
Info
- Publication number
- JPH024835B2 JPH024835B2 JP11827181A JP11827181A JPH024835B2 JP H024835 B2 JPH024835 B2 JP H024835B2 JP 11827181 A JP11827181 A JP 11827181A JP 11827181 A JP11827181 A JP 11827181A JP H024835 B2 JPH024835 B2 JP H024835B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- pressure chamber
- passage
- valve
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Driven Valves (AREA)
- Fluid-Pressure Circuits (AREA)
Description
【発明の詳細な説明】
この発明は、電磁ポンプによつて発生した流体
圧を用いて弁などを駆動するアクチエータに関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an actuator that drives a valve or the like using fluid pressure generated by an electromagnetic pump.
貯留室内の作動油を電磁ポンプの作用で圧力室
に圧送し、ついで貯留室にオリフイスを介して戻
すような循環路を形成することにより、圧力室内
に所望の圧力を発生させることが可能であり、こ
の圧力で応動体を変位させることによつて弁など
を駆動することができる。このような形態のアク
チエータにおいて、オリフイスの開口面積が一定
であれば、圧力室内に発生する圧力は電磁ポンプ
の吐出流量に対応することになり、応動体を比例
制御することも可能であるが、ゴミの付着などに
よつてオリフイスがつまると、電磁ポンプが停止
しても圧力室内の圧力は低下しなくなり、弁が開
いたままになるというような危険な事態を招く。
このような危険は、圧力室と貯留室との間をつな
ぐバイパス路を形成し、このバイパス路に、電磁
ポンプが動作していないときに開くバイパス弁を
設けることによつて回避することができる。しか
し圧力室内の圧力はバイパス弁を閉位置に向けて
押圧するように作用するので、圧力室内の圧力が
何かの原因で異常に高くなると、電磁ポンプが停
止しても圧力室内の圧力が低下しないことが起り
得る。 It is possible to generate the desired pressure in the pressure chamber by forming a circulation path in which the hydraulic oil in the storage chamber is pumped into the pressure chamber by the action of an electromagnetic pump and then returned to the storage chamber via an orifice. By displacing the responsive body with this pressure, a valve or the like can be driven. In this type of actuator, if the opening area of the orifice is constant, the pressure generated in the pressure chamber will correspond to the discharge flow rate of the electromagnetic pump, and it is also possible to proportionally control the response body. If the orifice becomes clogged with dirt, etc., the pressure inside the pressure chamber will not drop even if the electromagnetic pump stops, causing a dangerous situation such as the valve remaining open.
This kind of danger can be avoided by forming a bypass path connecting the pressure chamber and the storage chamber, and by providing this bypass path with a bypass valve that opens when the electromagnetic pump is not operating. . However, the pressure in the pressure chamber acts to push the bypass valve toward the closed position, so if the pressure in the pressure chamber becomes abnormally high for some reason, the pressure in the pressure chamber will drop even if the electromagnetic pump stops. It may happen that you don't.
この発明は、圧力室内の圧力を常に所定の上限
値以下に維持することにより、電磁ポンプの停止
時に確実にバイパス弁を開いて圧力室の圧力を解
放できるようにしたアクチエータを提供すること
を目的としている。 An object of the present invention is to provide an actuator that can reliably open a bypass valve and release the pressure in a pressure chamber when an electromagnetic pump is stopped by maintaining the pressure in the pressure chamber below a predetermined upper limit. It is said that
つぎにこの発明の一実施例について図面を参照
して説明する。図に示す流量制御装置は、油圧を
発生する圧力発生部Ａと、この油圧を変位に変換
する変換部Ｂと、この変換部Ｂによつて駆動され
る制御部Ｃとで構成されている。この例では、給
湯器のような燃焼室に供給される燃料ガスの流量
を制御するように構成された流量制御装置を示
す。 Next, an embodiment of the present invention will be described with reference to the drawings. The flow control device shown in the figure is composed of a pressure generating section A that generates hydraulic pressure, a converting section B that converts this hydraulic pressure into displacement, and a control section C that is driven by this converting section B. This example shows a flow control device configured to control the flow rate of fuel gas supplied to a combustion chamber, such as a water heater.
圧力発生部Ａは、コイル１１およびその中心孔
内を貫通する作動部１２からなる電磁ポンプ１３
を有する。この電磁ポンプ１３は、貯留室１４内
に収容されている作動油を通路１５から作動部１
２内に吸引し、ついで通路１６を経て圧力室１７
内に圧送するように働く。また圧力室１７は、通
路１８を介して第２の圧力室１９にも連通してい
る。さらに圧力室１７は、相互に並列になるよう
に挿入されたオリフイス２０および逃し弁２１を
有する通路２２によつて貯留室１４にも接続され
ている。したがつて電磁ポンプ３の動作時には、
作動油は貯留室１４から通路１５、作動部１２、
通路１６、圧力室１７および通路２２を通つて貯
留室１４に戻る経路で循環し、オリフイス２０の
作用で、電磁ポンプ１３の吐出流量に応じた圧力
が圧力室１７および１９内に発生する。また圧力
室１７側の圧力が所定の最大値以下であれば、逃
し弁２１は閉状態を保つ。 The pressure generating section A is an electromagnetic pump 13 consisting of a coil 11 and an actuating section 12 penetrating through the center hole thereof.
has. This electromagnetic pump 13 supplies hydraulic oil stored in a storage chamber 14 to an operating section 1 from a passage 15.
2 and then passes through the passage 16 to the pressure chamber 17.
It works to pump the inside of the body. The pressure chamber 17 also communicates with a second pressure chamber 19 via a passage 18. Furthermore, the pressure chamber 17 is also connected to the storage chamber 14 by a passage 22 having an orifice 20 and a relief valve 21 inserted parallel to each other. Therefore, when the electromagnetic pump 3 operates,
The hydraulic oil flows from the storage chamber 14 to the passage 15, the operating section 12,
It circulates through the passage 16, the pressure chamber 17, and the passage 22, returning to the storage chamber 14, and by the action of the orifice 20, a pressure corresponding to the discharge flow rate of the electromagnetic pump 13 is generated in the pressure chambers 17 and 19. Further, if the pressure on the pressure chamber 17 side is below a predetermined maximum value, the relief valve 21 remains closed.
一方、電磁ポンプ１３の吸込側の通路１５と吐
出側の通路１６とを連結するバイパス通路２３が
形成され、このバイパス通路２３内に、電磁ポン
プ１３が正常に動作している間だけ閉位置に保持
されるバイパス弁２４が設けられている。したが
つて圧力室１７内の圧力が上昇したのちに電磁ポ
ンプ１３の動作が停止すると、バイパス弁２４は
直ちに開位置に移動し、これによつて圧力室１７
内の圧力は瞬時に開放される。 On the other hand, a bypass passage 23 is formed that connects the suction side passage 15 and the discharge side passage 16 of the electromagnetic pump 13, and the bypass passage 23 is in the closed position only while the electromagnetic pump 13 is operating normally. A retained bypass valve 24 is provided. Therefore, when the electromagnetic pump 13 stops operating after the pressure in the pressure chamber 17 has increased, the bypass valve 24 immediately moves to the open position, thereby causing the pressure chamber 17 to rise.
The pressure inside is instantly released.
圧力発生部Ａに隣接して設けられた変換部Ｂ
は、２つの応動体３１および３２を有する。第１
の応動体３１は、圧力室１７の内部にベロフラム
を介して接しているとともに、軸方向に移動自在
なロツド３３の先端に固定され、スプリング３４
によつて圧力室１７内に向けて付勢されている。
また第２の応動体３２は、圧力室１９にベロフラ
ムを介して接しているとともに、軸方向に移動自
在なロツド３５の先端に支持された状態で、スプ
リング３６によつて圧力室１９内に向けて押圧さ
れている。したがつて圧力室１７および１９内の
圧力が上昇すると、応動体３１および３２はそれ
ぞれスプリング３４および３６に抗して移動し、
圧力が低すれば元の位置に戻るという動作を行
い、ここに圧力−変位変換が行われる。第２の応
動体３２の受圧面積は第１の応動体３１よりも小
さく、したがつて第２の応動体３２が変位し始め
る圧力は第１の応動体３１のそれよりも高い。 Conversion section B provided adjacent to pressure generation section A
has two reaction bodies 31 and 32. 1st
The response body 31 is in contact with the inside of the pressure chamber 17 via a bellows frame, and is fixed to the tip of a rod 33 that is movable in the axial direction, and is supported by a spring 34.
is urged toward the inside of the pressure chamber 17 by.
The second response body 32 is in contact with the pressure chamber 19 via a bellows frame, and is supported by the tip of a rod 35 that is movable in the axial direction, and directed into the pressure chamber 19 by a spring 36. is being pressed down. Therefore, when the pressure in the pressure chambers 17 and 19 increases, the responsive bodies 31 and 32 move against the springs 34 and 36, respectively,
When the pressure decreases, it returns to its original position, and pressure-displacement conversion is performed here. The pressure receiving area of the second reaction body 32 is smaller than that of the first reaction body 31, and therefore the pressure at which the second reaction body 32 starts to be displaced is higher than that of the first reaction body 31.
制御部Ｃは、入口通路４１、連絡通路４２およ
び出口通路４３を有し、連絡通路４２内には好ま
しくはレギレータ（図示せず）が設けられる。入
口通路４１および連絡通路４２は、弁座４４の中
心孔を介して相互に連通し、この弁座４４には開
閉弁４５がスプリング４６の作用で圧接されてい
る。そして開閉弁４５を支持する弁ロツド４７
は、前記のロツド３３の先端と当接している。ま
た連絡通路４２および出口通路４３は、弁座４８
の中心孔を介して相互に連通し、この弁座４８に
スプリング４９によつて比例弁５０が圧接されて
いる。そして比例弁５０の中心部に設けられた弁
ロツド５１は、その一端で前記のロツド３６の先
端と当接している。この比例弁５０は、弁座４８
に密着した全閉位置と、最も離れた全開位置との
間の範囲内で移動することによつて、連絡通路４
２から出口通路４３に流れる被制御流体、たとえ
ば燃料ガスの流量を比例制御することができる。 The control section C has an inlet passage 41, a communication passage 42, and an outlet passage 43, and preferably a regulator (not shown) is provided in the communication passage 42. The inlet passage 41 and the communication passage 42 communicate with each other through a center hole of a valve seat 44 , and an on-off valve 45 is pressed against the valve seat 44 by the action of a spring 46 . and a valve rod 47 that supports the on-off valve 45.
is in contact with the tip of the rod 33 mentioned above. Further, the communication passage 42 and the outlet passage 43 are connected to the valve seat 48.
A proportional valve 50 is pressed against the valve seat 48 by a spring 49. A valve rod 51 provided at the center of the proportional valve 50 is in contact with the tip of the rod 36 at one end thereof. This proportional valve 50 has a valve seat 48
By moving within the range between the fully closed position that is in close contact with the
2 to the outlet passage 43 can be proportionally controlled.
このように構成されたアクチエータにおいて、
何かの原因、たとえばオリフイス２０がつまるこ
とによつて圧力室１７側の圧力が異常に上昇する
と、オリフイス２０と並列に接続されている逃し
弁２１が開き、圧力室１７側の作動油は、この逃
し弁２１を通して貯留室１４に戻る。したがつて
逃し弁２１が開く圧力を適当な値に設定しておけ
ば、圧力室１７側の圧力が異常に上昇することは
なく、電磁ポンプ１３が停止したときはバイパス
弁２４が直ちに開いて圧力室１７側の圧力の開放
が瞬時に行われる。 In the actuator configured in this way,
If the pressure on the pressure chamber 17 side rises abnormally due to some reason, for example, the orifice 20 is clogged, the relief valve 21 connected in parallel with the orifice 20 opens, and the hydraulic oil on the pressure chamber 17 side is released. It returns to the storage chamber 14 through this relief valve 21. Therefore, if the pressure at which the relief valve 21 opens is set to an appropriate value, the pressure on the pressure chamber 17 side will not rise abnormally, and when the electromagnetic pump 13 stops, the bypass valve 24 will open immediately. The pressure on the pressure chamber 17 side is instantly released.
以上のようにこの発明によれば、圧力室側と貯
留室とをつなぐ通路内に、圧力室内の圧力が所定
の最大値を越えて異常に上昇したときに開く逃し
弁を挿入したので、圧力室内の圧力が異常に上昇
してバイパス弁を開き難くするという不都合はな
くなり、電磁ポンプが停止したときには瞬時に圧
力室内の圧力が解放され、安全性が大幅に向上す
るという効果が得られる。 As described above, according to the present invention, a relief valve that opens when the pressure in the pressure chamber abnormally increases beyond a predetermined maximum value is inserted in the passage connecting the pressure chamber side and the storage chamber. This eliminates the inconvenience of abnormally rising pressure in the chamber and making it difficult to open the bypass valve, and when the electromagnetic pump stops, the pressure in the pressure chamber is instantly released, greatly improving safety.
図はこの発明の一実施例によるアクチエータの
縦断面図である。
Ａ…圧力発生部、Ｂ…変換部、Ｃ…制御部、１
１…コイル、１２…作動部、１３…電磁ポンプ、
１４…貯留室、１７，１９…圧力室、２０…オリ
フイス、２１…逃し弁、２３…バイパス通路、２
４…バイパス弁、３１，３２…応動体、４１…入
口通路、４２…連絡通路、４３…出口通路、４４
…弁座、４５…開閉弁、４８…弁座、５０…比例
弁。
The figure is a longitudinal sectional view of an actuator according to an embodiment of the present invention. A...pressure generation section, B...conversion section, C...control section, 1
1... Coil, 12... Operating part, 13... Electromagnetic pump,
14... Storage chamber, 17, 19... Pressure chamber, 20... Orifice, 21... Relief valve, 23... Bypass passage, 2
4...Bypass valve, 31, 32...Response body, 41...Inlet passage, 42...Communication passage, 43...Outlet passage, 44
...Valve seat, 45...Opening/closing valve, 48...Valve seat, 50...Proportional valve.
Claims (1)
ポンプと、上記圧力室側の作動流体を上記貯留室
に戻すためのオリフイスを備えた通路と、上記圧
力室内に発生した圧力に応じて変位する応動体
と、上記圧力室側と上記貯留室とをつなぐように
設けられたバイパス通路と、上記電磁ポンプの作
動中だけ上記バイパス通路を遮断するバイパス弁
と、上記オリフイスと並列に接続され、上記圧力
室内の圧力が設定値以上に上昇したときに開く逃
し弁とを備えたアクチエータ。1. An electromagnetic pump that pumps the working fluid in the storage chamber to the pressure chamber, a passageway equipped with an orifice for returning the working fluid in the pressure chamber to the storage chamber, and a passage that is displaced according to the pressure generated in the pressure chamber. a reaction body, a bypass passage provided to connect the pressure chamber side and the storage chamber, a bypass valve that shuts off the bypass passage only while the electromagnetic pump is in operation, and a bypass valve connected in parallel to the orifice, An actuator equipped with a relief valve that opens when the pressure in the pressure chamber rises above a set value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11827181A JPS5821079A (en) | 1981-07-27 | 1981-07-27 | Actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11827181A JPS5821079A (en) | 1981-07-27 | 1981-07-27 | Actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5821079A JPS5821079A (en) | 1983-02-07 |
| JPH024835B2 true JPH024835B2 (en) | 1990-01-30 |
Family
ID=14732505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11827181A Granted JPS5821079A (en) | 1981-07-27 | 1981-07-27 | Actuator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5821079A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0665346U (en) * | 1991-01-07 | 1994-09-16 | 株式会社タムラ製作所 | Paper detection device in printer |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6440776A (en) * | 1987-08-05 | 1989-02-13 | Koganei Ltd | Pressure control valve |
-
1981
- 1981-07-27 JP JP11827181A patent/JPS5821079A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0665346U (en) * | 1991-01-07 | 1994-09-16 | 株式会社タムラ製作所 | Paper detection device in printer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5821079A (en) | 1983-02-07 |
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