JPH01316586A - Pilot type solenoid valve - Google Patents
Pilot type solenoid valveInfo
- Publication number
- JPH01316586A JPH01316586A JP14882488A JP14882488A JPH01316586A JP H01316586 A JPH01316586 A JP H01316586A JP 14882488 A JP14882488 A JP 14882488A JP 14882488 A JP14882488 A JP 14882488A JP H01316586 A JPH01316586 A JP H01316586A
- Authority
- JP
- Japan
- Prior art keywords
- valve body
- main valve
- pilot
- downstream side
- absorbing portion
- 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.)
- Pending
Links
- 238000011144 upstream manufacturing Methods 0.000 claims description 12
- 230000035939 shock Effects 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 12
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Fluid-Driven Valves (AREA)
Abstract
Description
本発明は弁体の上流と下流とにおける圧力差を、 利
用して開閉を打うパイロット式電磁弁、ことに水撃の防
止構造に関するものである。The present invention relates to a pilot type solenoid valve that opens and closes by utilizing the pressure difference between upstream and downstream of a valve body, and particularly to a water hammer prevention structure.
パイロット式電磁弁の一例を第６図及び第７図に示す、
Ｉｆｆ路はその途中に立ち上がる筒状の弁座１２によっ
て上流１１１９と下流側１ｏとに分けられており、弁座
１２の上方に周縁が固定されたグイア７ラムからなる主
弁体１１が配設され、主弁体１１の中央部下面が下流側
１ｏに、周部下面が上流［９に対向している。そして、
主弁体１１の上方には圧力室１４が形成されており、こ
の圧力室１４は主弁体１１の周部に形成されたオリアイ
ス１１ｍによって上流側９と連通ずるとともに、パイロ
ット弁２が設けられたパイロットＷ７を通じて下流側１
０と連通している。
パイロット弁２は、コイル１とプランツヤ−４並びに復
帰ぽね８からなるソレノイド３と、上記プランジャー４
の先端に設けられた弁体５が接する弁座６とによって形
成されたもので、常時は復帰ばね８による付勢で弁体５
が弁８！６に接することによって、バイロフト管７を閏
じている。
さて、このようにバイロフト管７が関しられている時に
は、圧力室１４の圧力がオリフィス１１ａを通じて上流
側９と同じになっているために、ダイアフラムである主
弁体１１は自己の弾性によって降下して弁座１２に接し
て管路を閑じている。
そして、ソレノイド３のフィル１に通電することで、ブ
ランツヤ−４を引き上げてパイロット弁２を開いたなら
ば、圧力室１４内の流体がパイロット？？７を通じて下
流側に流れ出るために、圧力室１４内の圧力が急速に降
下し、主弁体１１の上下に圧力差が生ずる。このために
、主弁体１１が上流側９の圧力に押されて上外し、管路
を開く。An example of a pilot type solenoid valve is shown in Figs. 6 and 7.
The If passage is divided into an upstream side 1119 and a downstream side 1o by a cylindrical valve seat 12 that rises in the middle, and a main valve body 11 made of a Guia 7 ram whose peripheral edge is fixed is disposed above the valve seat 12. The central lower surface of the main valve body 11 faces the downstream side 1o, and the peripheral lower surface faces the upstream side [9]. and,
A pressure chamber 14 is formed above the main valve body 11, and this pressure chamber 14 communicates with the upstream side 9 through an oriice 11m formed around the main valve body 11, and a pilot valve 2 is provided therein. Downstream side 1 through pilot W7
It communicates with 0. The pilot valve 2 includes a solenoid 3 consisting of a coil 1, a plunger 4 and a return pin 8, and the plunger 4.
The valve seat 6 is in contact with the valve body 5 provided at the tip of the valve body 5. Normally, the valve body 5 is biased by a return spring 8.
By coming into contact with the valves 8 and 6, the biloft pipe 7 is pinched. Now, when the viroft pipe 7 is connected in this way, the pressure in the pressure chamber 14 is the same as that on the upstream side 9 through the orifice 11a, so the main valve body 11, which is a diaphragm, descends due to its own elasticity. The pipe is open in contact with the valve seat 12. Then, by energizing the fill 1 of the solenoid 3, if the blunt gear 4 is pulled up and the pilot valve 2 is opened, the fluid in the pressure chamber 14 becomes the pilot valve. ? 7 to the downstream side, the pressure within the pressure chamber 14 rapidly drops, creating a pressure difference between the upper and lower sides of the main valve body 11. For this purpose, the main valve body 11 is pushed by the pressure on the upstream side 9 and removed, opening the pipeline.
このパイロット式電磁弁においては、パイロット弁２を
閉じて主弁体６を閉じる時、圧力室１４の圧力が上昇す
るまでは主弁体６は動かず、圧力室１４の圧力と上流側
９の圧力とが均衡した時点で急速に主弁体６が弁座１２
に着座して流路を閉じるために、水撃が生じるものとな
っている。このような圧力思上外の水撃は、電磁弁本体
はもちろん、電磁弁の上流側の配管系に破壊や水もれを
生じさせたり、圧力脈動による騒音を発生させていた。
このために、電磁弁のボディや配管系を通常使用圧力よ
りも相当大外な耐圧仕様で設計しなくてはならず、肉厚
が大きく、大型化したものとなってしまっており、コス
ト増大の大きな要因となっている。
本発明はこのような点に鑑み為されたものであって、そ
の目的とするところは水撃の発生を確実に防ぐことがで
きるパイロット式電磁弁を提供するにある。In this pilot type solenoid valve, when the pilot valve 2 is closed and the main valve body 6 is closed, the main valve body 6 does not move until the pressure in the pressure chamber 14 rises, and the pressure in the pressure chamber 14 and the upstream side 9 When the pressure is balanced, the main valve body 6 quickly moves to the valve seat 12.
Water hammer occurs because the water hammer closes the flow path. Such unexpected pressure water hammer causes damage and water leakage not only to the solenoid valve itself but also to the piping system upstream of the solenoid valve, and also causes noise due to pressure pulsations. For this reason, the body and piping system of the solenoid valve must be designed with pressure specifications that are considerably higher than the normal working pressure, resulting in thicker walls and larger sizes, which increases costs. This is a major factor. The present invention has been made in view of these points, and its object is to provide a pilot type solenoid valve that can reliably prevent the occurrence of water hammer.
しかして本発明に係るパイロット式電磁弁は、主弁体に
よって仕切られるとともにオリアイスを通じで主弁体の
上流側に連通している圧力室と、この圧力室と弁体の下
流側とを連通させているパイロット管と、ソレノイドに
て駆動されてパイロット管の開閉を行うパイロット弁と
を備えているものにおいて、主弁体における弁座への着
座時に下流側に面する部分が、弾性伸縮自在な衝撃吸収
部とされていることに特徴を有している。
〈作用〉
本発明によれば、主弁体が弁座に着座して流路を閉じる
時、主弁体の弾性伸縮自在な衝撃吸収部が下流側へと伸
張することによって＠激な圧力上昇、つまりは水撃を防
止する。
〈実施例〉
以下本発明を図示の実施例に基づいて説明すると、第１
図に示すように、このパイロット式電磁弁は、その基本
的構成並びに動作は上記従来例と同じであるが、主弁体
１１の構造が上記従来例と異なっている。
すなわち、ここにおける主弁体１１は、ゴムの一体成形
物として形成されたダイアプラムという点では従来例と
変わりはないが、その中央部、つまり下流側１０に面す
る部分の厚みが薄くて弾性伸縮が自在な衝撃吸収部１５
となっている。また、主弁体１１の弁座１２への着座部
分については、着座時の変形防止のために、ステンレス
等の金属板からなるリング状の補強板１６を埋め込んで
いる。
このように形成された主弁体１１においては、第２図に
示す流路が開いている状態から、パイロット弁２の状態
変化によって圧力室１４と上流側９との圧力差がな（な
り、主弁体１１が弁座１２に着座して流路を閑じた時、
第３図に示すように、弾性伸縮自在な衝撃吸収部１５が
下流側１０に膨らみ、アキエムレータとしてＷｌｎする
ことから、圧力室１４及び上流側９の急激な圧力上昇を
緩和して、水撃の発生を防ぐことができる上に、脈動を
抑えることができる。
衝撃吸収部１５としては、上記のような膜状の形態を持
つものに限るものではなく、ｆｆ５４図及び第５図に示
すように、下流側１０に延びたベローズ状のものであっ
てもよい。ベローズ状とした場合、衝撃吸収部１５の伸
張する度合を太き（取れることから、圧力上昇の緩和能
力が前記実施例の場合よりも高くなり、水撃の発生防止
を更に確実に行なうことができる。
【発明の効果］
以上のように本発明においては、主弁体が弁座に着座し
て流路を閉じる時、主弁体に形成されたｆ！Ｊｊ撃吸収
部が圧力上昇を緩和するものであり、このために水撃の
発生がなく、耐圧条件を下げることができて小型化及び
コスト低減に寄与する上に、従来のものに比して、主弁
体に差があるだけであるために、既存の電磁弁の水撃防
止にも容易に対応することができる。Therefore, the pilot type solenoid valve according to the present invention has a pressure chamber that is partitioned by the main valve body and communicates with the upstream side of the main valve body through the oriice, and a pressure chamber that communicates with the downstream side of the valve body. In a valve equipped with a pilot pipe that is driven by a solenoid to open and close the pilot pipe, the part of the main valve body that faces the downstream side when seated on the valve seat is elastically expandable. It is characterized by being a shock absorbing part. <Operation> According to the present invention, when the main valve body is seated on the valve seat and closes the flow path, the elastically expandable shock absorbing portion of the main valve body expands toward the downstream side, resulting in a significant pressure increase. In other words, it prevents water hammer. <Example> The present invention will be explained below based on the illustrated example.
As shown in the figure, the basic configuration and operation of this pilot type solenoid valve are the same as those of the conventional example described above, but the structure of the main valve body 11 is different from that of the conventional example. That is, the main valve body 11 here is the same as the conventional example in that it is a diaphragm formed as an integrally molded rubber product, but its center portion, that is, the portion facing the downstream side 10, is thinner and can be elastically expanded and contracted. Shock absorbing part 15 that can be freely
It becomes. In addition, a ring-shaped reinforcing plate 16 made of a metal plate such as stainless steel is embedded in the portion of the main valve body 11 that is seated on the valve seat 12 to prevent deformation when seated. In the main valve body 11 formed in this way, the pressure difference between the pressure chamber 14 and the upstream side 9 disappears due to a change in the state of the pilot valve 2 from the state where the flow path is open as shown in FIG. When the main valve body 11 seats on the valve seat 12 and opens the flow path,
As shown in FIG. 3, the elastically extensible shock absorbing portion 15 swells toward the downstream side 10 and acts as an axemulator, thereby alleviating the rapid pressure rise in the pressure chamber 14 and the upstream side 9 and preventing water hammer. Not only can this be prevented from occurring, but also pulsation can be suppressed. The shock absorbing part 15 is not limited to the one having a film-like form as described above, but may be a bellows-like part extending toward the downstream side 10, as shown in Fig. ff54 and Fig. 5. . In the case of a bellows shape, the degree of expansion of the shock absorbing portion 15 can be made thicker, so that the ability to alleviate pressure rise is higher than in the case of the above embodiment, and the occurrence of water hammer can be more reliably prevented. [Effects of the Invention] As described above, in the present invention, when the main valve body seats on the valve seat and closes the flow path, the f! As a result, water hammer does not occur, and pressure resistance conditions can be lowered, contributing to downsizing and cost reduction.Compared to conventional valves, the only difference is in the main valve body. Therefore, it can easily be used to prevent water hammer from existing solenoid valves.
第１図は本発明一実施例の断面図、第２図及び第３図は
同上の部分拡大断面図、第４図及び第５図は他の実施例
の断面図、第６図及び第７図は従来例の断面図であって
、１はコイル、２はバイロフト弁、１１は主弁体、１２
は弁座、１４は圧力室、１５は衝撃吸収部を示す。
代理人 弁理士 石 １）艮 上
第２ ｔ’−：
！２３ 【ｌシ１
第４図
Σ５図
第６図FIG. 1 is a sectional view of one embodiment of the present invention, FIGS. 2 and 3 are partially enlarged sectional views of the same, FIGS. 4 and 5 are sectional views of other embodiments, and FIGS. 6 and 7. The figure is a sectional view of a conventional example, where 1 is a coil, 2 is a virofft valve, 11 is a main valve body, and 12 is a sectional view of a conventional example.
14 is a pressure chamber, and 15 is a shock absorbing portion. Agent Patent Attorney Ishi 1) Ai No. 2 t'-: ! 23 [lshi1 Figure 4 Σ5 Figure 6
Claims (2)
通じて主弁体の上流側に連通している圧力室と、この圧
力室と弁体の下流側とを連通させているパイロット管と
、ソレノイドにて駆動されてパイロット管の開閉を行う
パイロット弁とを備えているものにおいて、主弁体にお
ける弁座への着座時に下流側に面する部分が、弾性伸縮
自在な衝撃吸収部とされているパイロット式電磁弁。(1) A pressure chamber that is partitioned by the main valve body and communicates with the upstream side of the main valve body through an orifice, a pilot pipe that communicates this pressure chamber with the downstream side of the valve body, and is driven by a solenoid. A pilot type electromagnetic valve is equipped with a pilot valve that opens and closes a pilot pipe, and the part of the main valve body that faces the downstream side when seated on the valve seat is an elastically expandable shock absorbing part. valve.
請求項１記載のパイロット式電磁弁。(2) The pilot type solenoid valve according to claim 1, wherein the shock absorbing portion has a bellows shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14882488A JPH01316586A (en) | 1988-06-15 | 1988-06-15 | Pilot type solenoid valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14882488A JPH01316586A (en) | 1988-06-15 | 1988-06-15 | Pilot type solenoid valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01316586A true JPH01316586A (en) | 1989-12-21 |
Family
ID=15461546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14882488A Pending JPH01316586A (en) | 1988-06-15 | 1988-06-15 | Pilot type solenoid valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01316586A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5121511A (en) * | 1989-11-27 | 1992-06-16 | Matsushita Electric Works, Ltd. | Shower device |
| JPH074974U (en) * | 1993-06-21 | 1995-01-24 | シーケーディ株式会社 | Pilot control valve |
-
1988
- 1988-06-15 JP JP14882488A patent/JPH01316586A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5121511A (en) * | 1989-11-27 | 1992-06-16 | Matsushita Electric Works, Ltd. | Shower device |
| JPH074974U (en) * | 1993-06-21 | 1995-01-24 | シーケーディ株式会社 | Pilot control valve |
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