JP2503928Y2 - Constant differential pressure valve - Google Patents
Constant differential pressure valveInfo
- Publication number
- JP2503928Y2 JP2503928Y2 JP1766490U JP1766490U JP2503928Y2 JP 2503928 Y2 JP2503928 Y2 JP 2503928Y2 JP 1766490 U JP1766490 U JP 1766490U JP 1766490 U JP1766490 U JP 1766490U JP 2503928 Y2 JP2503928 Y2 JP 2503928Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pressure
- valve body
- differential pressure
- valve seat
- 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 - Lifetime
Links
Landscapes
- Safety Valves (AREA)
- Magnetically Actuated Valves (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 この考案は、高圧側流路と低圧側流路との差圧を所定
圧に維持するための定差圧弁に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a constant differential pressure valve for maintaining a differential pressure between a high-pressure side passage and a low-pressure side passage at a predetermined pressure.
定差圧弁は一般に、高圧側流路と低圧側流路との連通
口に形成された弁座に、低圧側流路側から弁体を付勢手
段によって押し当てて、両流路の差圧が所定圧以下のと
きは閉じ、両流路の差圧が所定圧を超えると開いて、両
流路の差圧を一定にするようにしている。A constant differential pressure valve generally presses the valve element from the low-pressure side flow passage side to the valve seat formed at the communication port between the high-pressure side flow passage and the low-pressure side flow passage by the biasing means, and the differential pressure between both flow passages is reduced. When the pressure is equal to or lower than a predetermined pressure, the pressure is closed, and when the pressure difference between the two flow paths exceeds the predetermined pressure, the pressure is opened to keep the pressure difference between the two flow paths constant.
第2図は従来の定差圧弁に用いられている平面状の弁
体51と弁座52を示している。このように弁部分が平面接
触するものでは、高圧側流路53の圧力と低圧側流路50の
圧力との差圧が、弁体51と弁座52との接触部の内径dに
作用するのか、或いは外径Dに作用するのか、又はその
平均寸法に作用するのか判然としない。FIG. 2 shows a flat valve body 51 and a valve seat 52 used in a conventional constant differential pressure valve. In the case where the valve portions are in planar contact as described above, the differential pressure between the pressure in the high pressure side flow passage 53 and the pressure in the low pressure side flow passage 50 acts on the inner diameter d of the contact portion between the valve body 51 and the valve seat 52. It is unclear whether it acts on the outer diameter D or on its average size.
したがって、弁の有効受圧面積をどように考えればよ
いのかがあいまいで、所定の定差圧を得るための付勢力
をどのように設定すればよいのか不明確なため、正確な
圧力設定を行うのが困難であった。Therefore, it is unclear how to consider the effective pressure receiving area of the valve, and it is unclear how to set the urging force to obtain a predetermined constant differential pressure, so accurate pressure setting is performed. Was difficult.
そこで、例えば第3図に示されるような円錐状の弁体
54も考えられるが、これは少しでも傾くと完全に閉じな
くなってしまう欠点があるので、採用するのは好ましく
ない。Therefore, for example, a conical valve body as shown in FIG.
54 is also conceivable, but this is not preferable because it has the drawback that it will not close completely if it is tilted even a little.
そこで弁の開閉が傾きに影響されず、しかも有効受圧
面積が明確になるものとして、第4図に示されるよう
に、弁体55を球状に形成したものが考えられている。た
だし、この場合には弁体55が弁座52に対して少しでも横
方向にずれると弁が完全に閉じなくなるので、弁体55を
プランジャ56に対して固定せず、弁体55が横方向に自由
にころがることができるようになっている。Therefore, it is considered that the valve body 55 is formed in a spherical shape as shown in FIG. 4 as a valve whose opening and closing is not affected by the inclination and the effective pressure receiving area becomes clear. However, in this case, if the valve body 55 shifts slightly laterally with respect to the valve seat 52, the valve will not close completely. You are free to roll around.
上述のように、定差圧弁においては球状の弁体を用い
ることが好ましいのであるが、第5図に示されるよう
に、プランジャ56面と弁体55との間に小さなごみ59が付
着すると、弁体55がころがらなくなって弁が閉じなくな
ってしまう欠点がある。一般に、弁の開閉は0.03mm以下
程度の非常に微妙な動作によって行われており、大きさ
が0.01mm以下の非常に小さなごみ59の付着によっても弁
が完全に閉じなくなり、高圧側流路53の圧力が下って、
低圧側流路50の圧力との所定の差圧が得られなくなって
しまう。As described above, it is preferable to use a spherical valve element in the constant differential pressure valve, but as shown in FIG. 5, if a small dust 59 is attached between the surface of the plunger 56 and the valve element 55, There is a drawback that the valve body 55 does not roll and the valve does not close. Generally, opening and closing of the valve is performed by a very delicate operation of about 0.03 mm or less, and even if a very small dust 59 of 0.01 mm or less adheres, the valve does not close completely and the high pressure side flow path 53 The pressure of
A predetermined pressure difference from the pressure in the low-pressure side channel 50 cannot be obtained.
この考案は、そのような従来の欠点を解消し、球状弁
の長所を生かし、しかもごみ等があっても開閉不良が生
じない定差圧弁を提供することを目的とする。An object of the present invention is to provide a constant differential pressure valve that solves the above-mentioned conventional drawbacks, makes the best use of the advantages of the spherical valve, and does not cause defective opening / closing even if there is dust or the like.
上記の目的を達成するため、本考案の定差圧弁は、高
圧側流路と低圧側流路との連通口に形成された弁座に低
圧側流路側から弁体を付勢手段によって押し当てて、両
流路の差圧が所定圧以下のときは閉じ、両流路の差圧が
所定圧を超えると開いて両流路の差圧を一定にするよう
にした定差圧弁において、上記弁体を細長い棒状に形成
して、その一端側を上記弁座に密着する球面状に形成す
ると共に、上記弁体を他端側を支点として揺動自在に配
置したことを特徴とする。In order to achieve the above-mentioned object, the constant differential pressure valve of the present invention is configured such that a valve body is pressed from a low pressure side flow passage side by a biasing means to a valve seat formed at a communication port between a high pressure side flow passage and a low pressure side flow passage. , A constant differential pressure valve that closes when the differential pressure between both flow paths is below a predetermined pressure and opens when the differential pressure between both flow paths exceeds a predetermined pressure to make the differential pressure between both flow paths constant. It is characterized in that the body is formed into an elongated rod shape, one end side of which is formed into a spherical shape that is in close contact with the valve seat, and the above-mentioned valve body is swingably arranged with the other end side as a fulcrum.
高圧側流路と低圧側流路との内圧の差が所定圧以下の
ときは、付勢手段の付勢力が差圧に勝つので、弁体の球
面部分が弁座に押し付けられて、弁が閉じる。When the internal pressure difference between the high-pressure side passage and the low-pressure side passage is less than or equal to a predetermined pressure, the urging force of the urging means overcomes the pressure difference, so that the spherical portion of the valve element is pressed against the valve seat and the valve is opened. close.
差圧が所定圧を超えると、その差圧が付勢手段の付勢
力に勝って弁体が弁座から離れ、弁が開く。このとき、
弁体は他端側の支点を中心にして僅かに揺動する。When the differential pressure exceeds a predetermined pressure, the differential pressure overcomes the biasing force of the biasing means, the valve body separates from the valve seat, and the valve opens. At this time,
The valve body slightly swings around the fulcrum on the other end side.
再び差圧が所定圧以下になると、付勢手段の付勢力が
差圧に勝って弁が閉じる。この時の動作に際して、弁体
の支点近傍に小さなごみ等が付着していても、揺動運動
の力点になる球面部と支点になる他端部との間の距離が
遠いので、てこの作用により、弁体を弁座に導こうとす
る力がごみ等を簡単に押しのけて、弁体は自由に揺動
し、弁体の球面部が弁座に密着して弁が閉じる。When the differential pressure becomes equal to or lower than the predetermined pressure again, the biasing force of the biasing means overcomes the differential pressure and the valve is closed. In this operation, even if a small dust or the like is attached near the fulcrum of the valve element, the distance between the spherical part that becomes the force point of the swinging motion and the other end that becomes the fulcrum is long, so the lever action Thus, the force for guiding the valve body to the valve seat easily pushes away dust and the like, and the valve body freely swings, and the spherical portion of the valve body comes into close contact with the valve seat to close the valve.
〔実施例〕 図面を参照して実施例を説明する。[Example] An example will be described with reference to the drawings.
第1図において、1はハウジング、2は高圧側流路、
3は低圧側流路である。両流路2,3の連通口部分には弁
座4が形成されている。In FIG. 1, 1 is a housing, 2 is a high-pressure side passage,
Reference numeral 3 is a low pressure side flow path. A valve seat 4 is formed at a communication opening portion of both the flow paths 2 and 3.
5は、弁座4と軸を一致させて、スリーブ6の上半部
内に摺動自在に嵌挿されたプランジャである。プランジ
ャ5は鉄又は磁性ステンレス鋼などによって形成されて
おり、圧縮コイルバネ7によって、弁座4方向に付勢さ
れている。また、プランジャ5の軸線に沿って、上方か
ら細くて深いめくら孔10が穿設されている。Reference numeral 5 denotes a plunger slidably fitted in the upper half of the sleeve 6 with its axis aligned with the valve seat 4. The plunger 5 is made of iron, magnetic stainless steel, or the like, and is biased toward the valve seat 4 by the compression coil spring 7. Further, a thin and deep blind hole 10 is bored from above along the axis of the plunger 5.
8は、圧縮コイルバネ7のばね力の強さを調整するた
めの調整ねじであり、スリーブ6の下半部に固定的に嵌
挿された鉄芯9に螺合している。Reference numeral 8 is an adjusting screw for adjusting the strength of the spring force of the compression coil spring 7, which is screwed onto an iron core 9 fixedly inserted in the lower half of the sleeve 6.
スリーブ6の外側を囲んで電磁コイル11が設けられて
おり、それを囲んで、鉄芯9と鉄プレート13とを連結す
るようにヨーク12が固設されている。したがって、電磁
コイル11に通電することによって、プランジャ5と鉄芯
9との間に電磁力が作用し、電磁コイル11への通電量を
変えることにより、プランジャ5に作用する付勢力を微
調整することができる。21〜24はシール用のOリングで
ある。An electromagnetic coil 11 is provided so as to surround the outside of the sleeve 6, and a yoke 12 is fixedly provided so as to surround the sleeve 6 and connect the iron core 9 and the iron plate 13. Therefore, when the electromagnetic coil 11 is energized, an electromagnetic force acts between the plunger 5 and the iron core 9, and by changing the energization amount to the electromagnetic coil 11, the biasing force acting on the plunger 5 is finely adjusted. be able to. 21 to 24 are O-rings for sealing.
15は弁体であり、細長い棒状のロッド15aの頭部に鋼
球15bがスポット溶接などによって固着されて構成され
ている。鋼球15bは、弁座4に密着して弁座4を完全に
塞ぐことができる。ロッド15aは、プランジャ5に形成
された孔10内に挿通されており、その下端部15cは孔10
の底部に当接している。Reference numeral 15 denotes a valve body, which is formed by fixing a steel ball 15b to the head of an elongated rod-shaped rod 15a by spot welding or the like. The steel ball 15b is in close contact with the valve seat 4 and can completely close the valve seat 4. The rod 15a is inserted into the hole 10 formed in the plunger 5, and the lower end portion 15c of the rod 15a has a hole 10a.
Abuts the bottom.
孔10の底部は円錐状に凹んで形成されているのに対
し、ロッドの下端部15cは球状に丸められている。した
がって、ロッドの下端部15cは孔10の軸線位置からずれ
ることなく、弁体15はその下端部15cを支点として自由
に揺動することができる。The bottom of the hole 10 is formed in a conical recess, while the lower end 15c of the rod is rounded into a spherical shape. Therefore, the lower end portion 15c of the rod does not shift from the axial position of the hole 10, and the valve body 15 can freely swing about the lower end portion 15c as a fulcrum.
次に上記実施例の動作について説明する。 Next, the operation of the above embodiment will be described.
高圧側流路2と低圧側流路3との差圧が所定圧以下の
ときには、電磁コイル11によって生じる電磁力と圧縮コ
イルバネ7のばね力とにより定まる付勢力Fが差圧に勝
っている。したがって、弁体15の鋼球15b部分が弁座4
に押し付けられ、弁が閉じた状態になって、高圧側流路
2と低圧側流路3との間は塞がれる。When the pressure difference between the high-pressure side flow path 2 and the low-pressure side flow path 3 is less than or equal to a predetermined pressure, the biasing force F determined by the electromagnetic force generated by the electromagnetic coil 11 and the spring force of the compression coil spring 7 exceeds the pressure difference. Therefore, the steel ball 15b portion of the valve body 15 is located in the valve seat
The high pressure side flow path 2 and the low pressure side flow path 3 are closed by being pressed against the valve to close the valve.
この時の弁座4と鋼球15bとはほとんど線接触の状態
となるので、弁体15の有効受圧面積は非常に正確に特定
することができる。Since the valve seat 4 and the steel ball 15b at this time are almost in line contact with each other, the effective pressure receiving area of the valve body 15 can be specified very accurately.
差圧が所定圧を超えると,その差圧が付勢力Fに勝っ
て、弁体15が僅かに押し下げられ、弁が開いた状態にな
って、高圧側流路2内の流体が低圧側流路3内に流れ込
む。この時弁体15は、鋼球15bが部分的に弁座4に接触
するように、下端部15cを支点としていずれかの方向に
僅かに揺動する。When the differential pressure exceeds a predetermined pressure, the differential pressure overcomes the urging force F, the valve body 15 is slightly pushed down, the valve is opened, and the fluid in the high pressure side flow path 2 flows into the low pressure side flow. It flows into the road 3. At this time, the valve element 15 slightly swings in either direction with the lower end portion 15c as a fulcrum so that the steel ball 15b partially contacts the valve seat 4.
再び差圧が所定圧以下になると、付勢力Fが差圧に勝
ってプランジャ10が弁体15を押しあげ、弁体15が弁座4
に密着して弁が閉じた状態となる。このようにして、高
圧側流路2と低圧側流路3との差圧が常に所定圧に維持
される。この時の動作に際しては、鋼球15b部分を弁座
4の中心に導こうとする力によって、弁体15は下端部15
cを支点として揺動する。したがって、下端部15cの支点
近傍に小さなごみ等が付着していても、てこの作用によ
り、弁体15の頭部に加わる力が下端部15c付近のごみ等
を簡単に押しのける。したがって、弁体15は自由に揺動
し、確実に弁座4に密着して弁を閉じることができる。When the differential pressure becomes equal to or lower than the predetermined pressure again, the urging force F overcomes the differential pressure, the plunger 10 pushes up the valve element 15, and the valve element 15 causes the valve seat 4 to move.
And the valve is closed. In this way, the differential pressure between the high pressure side flow path 2 and the low pressure side flow path 3 is always maintained at a predetermined pressure. At the time of operation at this time, the valve body 15 is moved to the lower end portion 15 by the force of guiding the steel ball 15b portion to the center of the valve seat 4.
Swing with c as the fulcrum. Therefore, even if a small dust or the like is attached near the fulcrum of the lower end portion 15c, the lever action can easily displace the dust or the like near the lower end portion 15c by the force applied to the head portion of the valve body 15. Therefore, the valve body 15 freely swings, and it is possible to close the valve securely by making close contact with the valve seat 4.
なお、上記の所定圧は、調整ねじ8及び電磁コイル11
によって任意に設定することができる。また、弁体15の
頭部は必ずしも鋼球にする必要はなく、弁座4と当接す
る面が球面であればよく、弁体15は全体として一部品に
形成してもよい。The above-mentioned predetermined pressure is applied to the adjusting screw 8 and the electromagnetic coil 11.
Can be set arbitrarily. Further, the head portion of the valve body 15 does not necessarily have to be a steel ball, and the surface contacting the valve seat 4 may be a spherical surface, and the valve body 15 may be formed as one part as a whole.
本考案の定差圧弁によれば、弁体の弁座に対する密着
面を球面状に形成したので、有効受圧面積を正確に把握
して正確な圧力制御を行うことができる。しかも、弁体
を細長い棒状に形成して他端側を支点として揺動自在に
形成したので、その支点付近に小さなごみ等があって
も、弁体は容易に揺動して弁座に密着する。その結果、
弁を確実に閉じることができるので、定差圧の圧力制御
を安定して正確に行うことができる優れた効果を有す
る。According to the constant differential pressure valve of the present invention, since the contact surface of the valve body with respect to the valve seat is formed into a spherical shape, it is possible to accurately grasp the effective pressure receiving area and perform accurate pressure control. Moreover, since the valve element is formed into a slender rod shape and is swingable with the other end side as a fulcrum, even if there is a small dust near the fulcrum, the valve element easily rocks and makes close contact with the valve seat. To do. as a result,
Since the valve can be reliably closed, there is an excellent effect that the pressure control of the constant differential pressure can be stably and accurately performed.
第1図は実施例の縦断面図、 第2図ないし第5図は各々従来例の説明図である。 2……高圧側流路、3……低圧側流路、4……弁座、5
……プランジャ、7……圧縮コイルバネ、8……調整ね
じ、9……鉄芯、10……孔、11……電磁コイル、15……
弁体、15a……ロッド、15b……鋼球、15c……下端部
(支点)。FIG. 1 is a longitudinal sectional view of an embodiment, and FIGS. 2 to 5 are explanatory views of a conventional example. 2 ... High pressure side flow path, 3 ... Low pressure side flow path, 4 ... Valve seat, 5
…… Plunger, 7 …… Compression coil spring, 8 …… Adjustment screw, 9 …… Iron core, 10 …… hole, 11 …… Electromagnetic coil, 15 ……
Valve body, 15a …… rod, 15b …… steel ball, 15c …… bottom end (fulcrum).
Claims (1)
された弁座に低圧側流路側から弁体を付勢手段によって
押し当てて、両流路の差圧が所定圧以下のときは閉じ、
両流路の差圧が所定圧を超えると開いて両流路の差圧を
一定にするようにした定差圧弁において、 上記弁体を細長い棒状に形成して、その一端側を上記弁
座に密着する球面状に形成すると共に、上記弁体を他端
側を支点として揺動自在に配置したことを特徴とする定
差圧弁。1. A valve body is pressed from a low pressure side flow path side by a biasing means against a valve seat formed at a communication port between the high pressure side flow path and the low pressure side flow path so that the differential pressure between both flow paths is a predetermined pressure. Close when:
In a constant differential pressure valve that opens when the pressure difference between both flow paths exceeds a predetermined pressure so as to make the pressure difference between both flow paths constant, the valve body is formed into an elongated rod shape, and one end of the valve body is connected to the valve seat. A constant differential pressure valve characterized in that the valve body is formed in a spherical shape that is in close contact with, and the valve body is swingably arranged with the other end side as a fulcrum.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1766490U JP2503928Y2 (en) | 1990-02-23 | 1990-02-23 | Constant differential pressure valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1766490U JP2503928Y2 (en) | 1990-02-23 | 1990-02-23 | Constant differential pressure valve |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH03108980U JPH03108980U (en) | 1991-11-08 |
JP2503928Y2 true JP2503928Y2 (en) | 1996-07-03 |
Family
ID=31520850
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1766490U Expired - Lifetime JP2503928Y2 (en) | 1990-02-23 | 1990-02-23 | Constant differential pressure valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2503928Y2 (en) |
-
1990
- 1990-02-23 JP JP1766490U patent/JP2503928Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH03108980U (en) | 1991-11-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |