JP3584642B2 - Pressure reducing valve for water supply device - Google Patents

Pressure reducing valve for water supply device Download PDF

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Publication number
JP3584642B2
JP3584642B2 JP29473296A JP29473296A JP3584642B2 JP 3584642 B2 JP3584642 B2 JP 3584642B2 JP 29473296 A JP29473296 A JP 29473296A JP 29473296 A JP29473296 A JP 29473296A JP 3584642 B2 JP3584642 B2 JP 3584642B2
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Japan
Prior art keywords
pressure
valve
side opening
regulating chamber
opening
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JP29473296A
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JPH10143252A (en
Inventor
博文 木曽
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Priority to JP29473296A priority Critical patent/JP3584642B2/en
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Description

【０００１】
【発明の属する技術分野】
本発明は給水装置に付設し、所要の圧力で給水する給水装置用減圧弁に関する。
【０００２】
【従来の技術】
従来のこの種の給水装置用減圧弁は、図３に示すように減圧弁本体１３に一次側開口１と二次側開口２をその中心線が互いに水平になるように形成し、前記一次側開口１と二次側開口２間で、かつ、前記中心線と直交する線上に、弁座１４と、この弁座１４に対応して一次側開口１と二次側開口２間の流通を制御する主弁３と、前記主弁３を結合した弁棒５と、前記弁棒５の端部に結合したバランスピストン４と、前記バランスピストン４が収められた調圧室８を設け、前記調圧室８を前記二次側開口２に連通させる通圧路１２と、前記調圧室８の圧力を調整するためのダイヤフラム１０、圧力調整ネジ１８および圧力調整バネ６等の圧力調整部材を備えた構成となっている。
【０００３】
【発明が解決しようとする課題】
上記構成の給水装置用減圧弁は、図４に示すように水量が変化しても一次側圧力Ｐ１が一定であれば、二次側圧力Ｐ２を一次側圧力Ｐ１より低い任意の圧力にすることができる。しかし、図５に示すように給水装置の流量Ｑと圧力Ｈの関係は、水量Ｑが増すと吐出圧力、つまり減圧弁から見れば一次側圧力Ｐ１が低下する特性であるため、二次側圧力Ｐ２も低下する課題を有していた。
【０００４】
本発明は前記従来の課題を解決するもので、給水装置の一次側圧力が多少変動しても、二次側圧力を一定に維持できる給水装置用減圧弁を提供することを目的とする。
【０００５】
【課題を解決するための手段】
前記目的を達成するため本発明は、一次側開口と二次側開口間に、弁座と、この弁座に対応して一次側開口と二次側開口間の流通を制御する主弁と、前記主弁を結合した弁棒と、前記弁棒の端部に結合したバランスピストンと、前記バランスピストンが収められた調圧室を設け、前記調圧室を前記二次側開口に連通させる通圧路と、前記調圧室の圧力を調整するためのダイヤフラムを含む圧力調整部材を備え、前記バランスピストンに一次側開口の圧力を調圧室に洩らす洩圧路を形成し、前記ダイヤフラムに前記通圧路の通圧制御するパイロット弁を設けた給水装置用減圧弁であって、主弁が弁座の二次側開口側に配置されるとともに付勢バネで弁座方向に付勢され、かつ、一次側開口の圧力が洩圧路から調圧室に洩れて調圧室の設定圧力より高くなったときは、パイロット弁が通圧路を開いて調圧室の圧力が二次側開口に洩れることにより二次側圧力を一定にする構成とする。
【０００６】
本発明によれば、給水装置の一次側圧力が多少変動しても、二次側圧力を一定に維持できるものであり、たとえば、使用水量が１０Ｌ／ｍｉｎ（台所１ヵ所使用）程度の少ないときも目標とする二次側圧力に調整できる。
【０００７】
【発明の実施の形態】
本発明の請求項１に記載の発明は、減圧弁本体に一次側開口と二次側開口をその中心線が互いに水平になるように形成し、前記一次側開口と二次側開口間で、かつ、前記中心線と直交する線上に、弁座と、この弁座に対応して一次側開口と二次側開口間の流通を制御する主弁と、前記主弁を結合した弁棒と、前記弁棒の端部に結合したバランスピストンと、前記バランスピストンが収められた調圧室を設け、前記調圧室を前記二次側開口に連通させる通圧路と、前記調圧室の圧力を調整するためのダイヤフラム、圧力調整ネジおよび圧力調整バネ等の圧力調整部材を備え、前記バランスピストンに一次側開口の圧力を調圧室に洩らす洩圧路を形成し、ダイヤフラムに通圧路の通圧制御するパイロット弁を設けた給水装置用減圧弁であって、主弁が弁座の二次側開口側に配置されるとともに付勢バネで弁座方向に付勢され、かつ、一次側開口の圧力が洩圧路から調圧室に洩れて調圧室の設定圧力より高くなったときは、パイロット弁が通圧路を開いて調圧室の圧力が二次側開口に洩れることにより二次側圧力を一定にする給水装置用減圧弁であり、バランスピストンの洩圧路から少しずつ一次側圧力を調圧室に洩らし、調圧室の圧力が設定した圧力より高くなるとダイヤフラムを作動させ、そのパイロット弁が通圧路を開いて二次側開口に圧力を逃がして調圧室の圧力を調整し、これにより、二次側開口の圧力を一定にコントロールするという作用を有する。
【０００８】
さらに、主弁が前記弁座の二次側開口側に配置されるとともに付勢バネで弁座方向に付勢されるため、少流量時に、主弁と弁座の開口量を少なくでき、少流量時から目標とする二次側圧力に調整できるという作用を有する。
【０００９】
以下、本発明の給水装置用減圧弁の実施の形態を、図面を参照して説明する。
（実施の形態１）
図１は本発明の実施の形態１の給水装置用減圧弁の断面図、図２は同給水装置用減圧弁の二次側圧力と流量の関係図である。なお、従来例と同じ構成部材には同一符号を付与している。
【００１０】
図１において１３は減圧弁本体であり、左右に一次側開口１と二次側開口２をその中心線が互いに水平になるように形成している。一次側開口１と二次側開口２間で、かつ、中心線と直交する線上に弁座１４を形成してあり、この弁座１４の二次側開口２側に、一次側開口１と二次側開口２間の流通を制御する主弁３を対応させてあり、主弁３を付勢バネ１７で弁座１４方向に付勢している。
【００１１】
主弁３には弁棒５を結合してあり、この弁棒５は中心線と直交する線上に位置し、その先端にピストンリング９を持つバランスピストン４を結合している。減圧弁本体１３の上部にはシリンダ１５および蓋７を取りつけてバランスピストン４が上下動する調圧室８を形成してあり、調圧室８の上側に調圧室８と連通し、かつ、ダイヤフラム１０で覆われた第２の調圧室８ａを形成している。
【００１２】
バランスピストン４のピストンリング９には、一次側開口１の圧力を調圧室８に洩らす隙間や孔等の洩圧路１６を形成してあり、また、第２の調圧室８ａは通圧路１２によって二次側開口２に連通させられている。調圧室８の圧力を調整するためのダイヤフラム１０には、通圧路１２の通圧制御を行うパイロット弁１１を設けてあり、また、ダイヤフラム１０は圧力調整ネジ１８および圧力調整バネ６等の調整部材によって圧力調整される構成となっている。
【００１３】
上記構成の給水装置用減圧弁において、主弁３とバランスピストン４の一次側面の面積はほぼ等しく、同じ圧力がかかるため互いの力は相殺される。よって調圧室８内圧力と主弁３の二次側面にかかる圧力が等しくなるようにバランスピストン４、弁棒５、主弁３が連動することとなる。このとき、主弁３の一次側圧力は、バランスピストン４のピストンリング９の洩圧路１６から少しずつ調圧室８に洩れ、調圧室８の圧力が圧力調整ネジ１８で設定した圧力より高くなると、ダイヤフラム１０が上動してそのパイロット弁１１が通圧路１２を開き、調圧室８の圧力は通圧路１２を通って二次側開口２に逃げ、調圧室８の内圧力、つまり主弁３の二次側圧力は常に一定なる。
【００１４】
次に図２にて主弁３を付勢する付勢バネ１７の働きについて説明する。ここで付勢バネ１７が無い場合、二次側圧力Ｂは１０Ｌ／ｍｉｎおよびＱ１のとき、設定圧力Ｐ２より高くなるが、付勢バネ１７を付けると少流量時に弁座１４と主弁３の隙間を狭くできるため、二次側性能曲線Ａに示すようにポンプ性能曲線Ｃの停止圧力Ｐ０から設定圧力Ｐ２（流量１０Ｌ／ｍｉｎ）まで急速に減圧し、Ｑ１のときも設定圧力Ｐ２にすることができる。
【００１５】
【発明の効果】
前記説明より明らかなように、本発明の給水用減圧弁は、給水装置の一次側圧力が多少変動しても、二次側圧力を一定に維持できるものであり、たとえば、使用水量が１０Ｌ／ｍｉｎ（台所１ヵ所使用）程度の少ないときも目標とする二次側圧力に調整できる。
【００１６】
また、少流量時に、主弁と弁座の開口量を少なくでき、少流量時から目標とする二次側圧力に調整できるという効果を有する。
【図面の簡単な説明】
【図１】本発明の実施の形態１の給水装置用減圧弁の断面図
【図２】同給水装置用減圧弁の二次側圧力と流量の関係図
【図３】従来の給水装置用減圧弁の断面図
【図４】同給水装置用減圧弁における水量変化と一次側、二次側圧力の関係図
【図５】同給水装置用減圧弁における流量と一次側、二次側圧力の関係図
【符号の説明】
１ 一次側開口
２ 二次側開口
３ 主弁
４ バランスピストン
５ 弁棒
６ 圧力調整バネ
７ 蓋
８ 調圧室
８ａ 第２の調圧室
９ ピストンリング
１０ ダイヤフラム
１１ パイロット弁
１２ 通圧路
１３ 減圧弁本体
１４ 弁座
１５ シリンダ
１６ 洩圧路
１７ 付勢バネ
１８ 圧力調整ネジ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pressure reducing valve for a water supply device which is attached to a water supply device and supplies water at a required pressure.
[0002]
[Prior art]
As shown in FIG. 3, this type of conventional pressure reducing valve for a water supply device has a primary opening 1 and a secondary opening 2 formed in a pressure reducing valve main body 13 so that their center lines are horizontal to each other. The valve seat 14 and the flow between the primary opening 1 and the secondary opening 2 corresponding to the valve seat 14 are controlled between the opening 1 and the secondary opening 2 and on a line orthogonal to the center line. A main valve 3, a valve stem 5 coupled to the main valve 3, a balance piston 4 coupled to an end of the valve stem 5, and a pressure regulation chamber 8 accommodating the balance piston 4. A pressure passage 12 for communicating the pressure chamber 8 with the secondary side opening 2, and a pressure adjusting member such as a diaphragm 10 for adjusting the pressure of the pressure adjusting chamber 8, a pressure adjusting screw 18 and a pressure adjusting spring 6 are provided. Configuration.
[0003]
[Problems to be solved by the invention]
As shown in FIG. 4, the pressure reducing valve for a water supply device, as shown in FIG. 4, changes the secondary pressure P 2 to an arbitrary pressure lower than the primary pressure P 1 if the primary pressure P 1 is constant even if the amount of water changes. Can be However, the relationship between the flow rate Q and pressure H of the water supply device as shown in FIG. 5, since water Q increases and the discharge pressure, that is, the primary pressure P 1 when viewed from the pressure reducing valve is a characteristic to decrease the secondary side the pressure P 2 also had a problem of reduction.
[0004]
An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a pressure reducing valve for a water supply device that can maintain a constant secondary pressure even if the primary pressure of the water supply device fluctuates somewhat.
[0005]
[Means for Solving the Problems]
To achieve the above object, the present invention provides a valve seat between a primary opening and a secondary opening, and a main valve that controls the flow between the primary opening and the secondary opening corresponding to the valve seat, A valve stem to which the main valve is coupled, a balance piston coupled to an end of the valve stem, and a pressure regulating chamber in which the balance piston is housed, wherein the pressure regulating chamber communicates with the secondary opening. and pressure passage, a pressure adjustment member including a diaphragm for adjusting the pressure of the regulating chamber, to form a reveal motor passage pressure of the primary-side opening to the pressure regulating chamber to the balance piston, the said diaphragm A pressure reducing valve for a water supply device provided with a pilot valve for controlling the pressure of the pressure passage , wherein the main valve is disposed on the secondary opening side of the valve seat and urged in the valve seat direction by an urging spring, In addition, the pressure of the primary side opening leaks from the leak pressure path to the pressure When it becomes high, a configuration that the pilot valve is a pressure of the open regulating chamber a through passage to the secondary pressure constant by leaking to the secondary-side opening.
[0006]
ADVANTAGE OF THE INVENTION According to this invention, even if the primary pressure of a water supply apparatus fluctuates somewhat, a secondary pressure can be maintained constant. For example, when the amount of used water is small about 10 L / min (use one kitchen). Can also be adjusted to the target secondary pressure.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
The invention according to claim 1 of the present invention is characterized in that a primary opening and a secondary opening are formed in the pressure reducing valve main body so that their center lines are horizontal to each other, and between the primary opening and the secondary opening, And, on a line orthogonal to the center line, a valve seat, a main valve that controls the flow between the primary side opening and the secondary side opening corresponding to the valve seat, and a valve stem coupled with the main valve, A balance piston coupled to an end of the valve stem, a pressure regulating chamber containing the balance piston, a pressure passage communicating the pressure regulating chamber with the secondary opening, and a pressure in the pressure regulating chamber. A pressure adjusting member such as a diaphragm for adjusting pressure, a pressure adjusting screw and a pressure adjusting spring is provided, a leak pressure path for leaking the pressure of the primary side opening to the pressure regulating chamber is formed in the balance piston, and a pressure passage of the diaphragm is formed. a water supply apparatus for a pressure reducing valve provided with a through pressure Gosuru pilot valve, the main Is arranged on the secondary side opening side of the valve seat and is urged in the valve seat direction by the urging spring, and the pressure of the primary side opening leaks from the leak pressure path to the pressure regulating chamber and the set pressure of the pressure regulating chamber is set. When the pressure becomes higher, the pilot valve opens the pressure passage and the pressure in the pressure regulation chamber leaks to the secondary opening. The primary pressure gradually leaks from the pressure path into the pressure control chamber, and when the pressure in the pressure control chamber becomes higher than the set pressure, the diaphragm is activated, and the pilot valve opens the pressure path to release the pressure to the secondary opening. This has the effect of adjusting the pressure in the pressure regulation chamber, thereby controlling the pressure in the secondary side opening to be constant.
[0008]
Further, since the main valve is arranged on the secondary opening side of the valve seat and is urged in the valve seat direction by the urging spring, the opening amount of the main valve and the valve seat can be reduced at a small flow rate, and This has the effect that the secondary pressure can be adjusted to the target secondary pressure from the flow rate.
[0009]
Hereinafter, an embodiment of a pressure reducing valve for a water supply device of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a sectional view of a pressure reducing valve for a water supply device according to Embodiment 1 of the present invention, and FIG. 2 is a diagram showing a relationship between a secondary pressure and a flow rate of the pressure reducing valve for the water supply device. The same reference numerals are given to the same components as those in the conventional example.
[0010]
In FIG. 1, reference numeral 13 denotes a pressure reducing valve main body, which is formed with a primary opening 1 and a secondary opening 2 on the left and right such that their center lines are horizontal to each other. A valve seat 14 is formed between the primary side opening 1 and the secondary side opening 2 and on a line perpendicular to the center line. The primary side opening 1 and the secondary side opening 2 The main valve 3 for controlling the flow between the secondary openings 2 is made to correspond, and the main valve 3 is urged by an urging spring 17 toward the valve seat 14.
[0011]
A valve stem 5 is connected to the main valve 3, and this valve stem 5 is located on a line orthogonal to the center line, and is connected to a balance piston 4 having a piston ring 9 at its tip. A cylinder 15 and a lid 7 are attached to the upper part of the pressure reducing valve body 13 to form a pressure regulating chamber 8 in which the balance piston 4 moves up and down. The pressure regulating chamber 8 communicates with the pressure regulating chamber 8 above the pressure regulating chamber 8, and A second pressure regulation chamber 8a covered with the diaphragm 10 is formed.
[0012]
The piston ring 9 of the balance piston 4 is formed with a leak pressure path 16 such as a gap or a hole for leaking the pressure of the primary opening 1 to the pressure regulating chamber 8. The passage 12 communicates with the secondary opening 2. The diaphragm 10 for adjusting the pressure of the pressure adjustment chamber 8 is provided with a pilot valve 11 for controlling the pressure of the pressure passage 12. The diaphragm 10 is provided with a pressure adjusting screw 18 and a pressure adjusting spring 6. The pressure is adjusted by the adjusting member.
[0013]
In the pressure reducing valve for a water supply device having the above-described structure, the areas of the primary side surfaces of the main valve 3 and the balance piston 4 are substantially equal, and the same pressure is applied, so that the mutual forces cancel each other. Therefore, the balance piston 4, the valve rod 5, and the main valve 3 work together so that the pressure in the pressure regulating chamber 8 and the pressure applied to the secondary side surface of the main valve 3 become equal. At this time, the primary pressure of the main valve 3 leaks little by little from the leak pressure path 16 of the piston ring 9 of the balance piston 4 into the pressure adjustment chamber 8, and the pressure in the pressure adjustment chamber 8 becomes lower than the pressure set by the pressure adjustment screw 18. When the pressure rises, the diaphragm 10 moves upward, the pilot valve 11 opens the pressure passage 12, and the pressure in the pressure regulation chamber 8 escapes to the secondary opening 2 through the pressure passage 12, and the pressure in the pressure regulation chamber 8 is reduced. The pressure, that is, the secondary pressure of the main valve 3 is always constant.
[0014]
Next, the operation of the urging spring 17 for urging the main valve 3 will be described with reference to FIG. If there is no biasing spring 17 where the secondary pressure B when the 10L / min and Q1, the set pressure P 2 becomes higher but more, the valve seat 14 and the main valve 3 to the low flow time and give a biasing spring 17 Can be narrowed, as shown in the secondary performance curve A, the pressure is rapidly reduced from the stop pressure P 0 of the pump performance curve C to the set pressure P 2 (flow rate 10 L / min). Can be 2 .
[0015]
【The invention's effect】
As is clear from the above description, the pressure reducing valve for water supply of the present invention can maintain the secondary pressure constant even if the primary pressure of the water supply device fluctuates somewhat. Even when it is as small as about min (using one place in the kitchen), it can be adjusted to the target secondary pressure.
[0016]
In addition, the opening amount of the main valve and the valve seat can be reduced when the flow rate is small, and the target secondary pressure can be adjusted from the time when the flow rate is small.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a pressure reducing valve for a water supply device according to a first embodiment of the present invention. FIG. 2 is a diagram showing a relationship between a secondary pressure and a flow rate of the pressure reducing valve for the water supply device. Cross-sectional view of the valve [Fig. 4] Relationship between water flow and primary and secondary pressures in the pressure reducing valve for the water supply device [Fig. 5] Relationship between flow rate and primary and secondary pressures in the pressure reducing valve for the water supply device Figure [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Primary side opening 2 Secondary side opening 3 Main valve 4 Balance piston 5 Valve rod 6 Pressure adjusting spring 7 Lid 8 Pressure regulating chamber 8a Second pressure regulating chamber 9 Piston ring 10 Diaphragm 11 Pilot valve 12 Pressure passage 13 Pressure reducing valve Body 14 Valve seat 15 Cylinder 16 Leak pressure path 17 Bias spring 18 Pressure adjusting screw

Claims (1)

減圧弁本体に一次側開口と二次側開口をその中心線が互いに水平になるように形成し、前記一次側開口と二次側開口間で、かつ、前記中心線と直交する線上に、弁座と、この弁座に対応して一次側開口と二次側開口間の流通を制御する主弁と、前記主弁を結合した弁棒と、前記弁棒の端部に結合したバランスピストンと、前記バランスピストンが収められた調圧室を設け、前記調圧室を前記二次側開口に連通させる通圧路と、前記調圧室の圧力を調整するためのダイヤフラム、圧力調整ネジおよび圧力調整バネ等の圧力調整部材を備え、前記バランスピストンに一次側開口の圧力を調圧室に洩らす洩圧路を形成し、前記ダイヤフラムに前記通圧路の通圧制御するパイロット弁を設けた給水装置用減圧弁であって、前記主弁が前記弁座の二次側開口側に配置されるとともに付勢バネで弁座方向に付勢され、かつ、前記一次側開口の圧力が前記洩圧路から前記調圧室に洩れて前記調圧室の設定圧力より高くなったときは、前記パイロット弁が前記通圧路を開いて前記調圧室の圧力が前記二次側開口に洩れることにより二次側圧力を一定にすることを特徴とする給水装置用減圧弁。A primary side opening and a secondary side opening are formed in the pressure reducing valve main body so that their center lines are horizontal to each other, and the valve is provided between the primary side opening and the secondary side opening, and on a line orthogonal to the center line. A main valve that controls the flow between the primary side opening and the secondary side opening corresponding to the valve seat, a valve stem coupled to the main valve, and a balance piston coupled to an end of the valve stem. A pressure regulating chamber in which the balance piston is housed, a pressure passage for communicating the pressure regulating chamber with the secondary opening, a diaphragm for regulating the pressure in the pressure regulating chamber, a pressure regulating screw, and a pressure. a pressure adjusting member such as the adjustment spring, said balance piston to form a reveal motor passage pressure of the primary-side opening to the pressure regulating chamber, provided with a through pressure Gosuru pilot valve of the through passage in the diaphragm water An apparatus pressure reducing valve, wherein the main valve is a secondary side of the valve seat. It is arranged on the mouth side and is urged in the valve seat direction by an urging spring, and the pressure of the primary side opening leaks from the leak pressure path to the pressure regulating chamber and becomes higher than the set pressure of the pressure regulating chamber. When the pilot valve opens the pressure passage, the pressure in the pressure regulation chamber leaks to the secondary side opening to make the secondary side pressure constant, thereby reducing the pressure of the water supply device.
JP29473296A 1996-11-07 1996-11-07 Pressure reducing valve for water supply device Expired - Fee Related JP3584642B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29473296A JP3584642B2 (en) 1996-11-07 1996-11-07 Pressure reducing valve for water supply device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29473296A JP3584642B2 (en) 1996-11-07 1996-11-07 Pressure reducing valve for water supply device

Publications (2)

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JPH10143252A JPH10143252A (en) 1998-05-29
JP3584642B2 true JP3584642B2 (en) 2004-11-04

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1762922A1 (en) 2005-09-07 2007-03-14 R. Nussbaum AG Valve for reducing the pressure in a fluid line
EP1764667B1 (en) 2005-09-07 2017-03-01 R. Nussbaum AG Valve for reducing the pressure in a fluid line
US20110284791A1 (en) * 2010-05-24 2011-11-24 Ernesto Vasquez Spring seat for use with actuators
DE202013010503U1 (en) * 2013-11-20 2014-02-20 Borgwarner Inc. control capsule
JP6410489B2 (en) 2014-06-25 2018-10-24 株式会社Ihi Pneumatically operated valve
FR3080431B1 (en) * 2018-04-24 2020-05-08 Commissariat A L'energie Atomique Et Aux Energies Alternatives FLUIDIC DEVICE FOR SUPPLYING INTEREST FLUID
CN116181940B (en) * 2023-04-26 2023-07-07 青岛开元阀门有限公司 Air pressure reducing valve for ship

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