WO2016163344A1 - Multi-functional valve having water hammer prevention function and having gate valve, fast-closing check valve, slow-closing auxiliary valve, and negative-pressure-activated air intake valve - Google Patents
Multi-functional valve having water hammer prevention function and having gate valve, fast-closing check valve, slow-closing auxiliary valve, and negative-pressure-activated air intake valve Download PDFInfo
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- WO2016163344A1 WO2016163344A1 PCT/JP2016/061062 JP2016061062W WO2016163344A1 WO 2016163344 A1 WO2016163344 A1 WO 2016163344A1 JP 2016061062 W JP2016061062 W JP 2016061062W WO 2016163344 A1 WO2016163344 A1 WO 2016163344A1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
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- the present invention relates to a pump facility equipped with a multi-function valve used in various plants.
- FIG. 3 is a diagram showing an example of a conventional general pump facility, in which 20 is a pump, 21 is a check valve, and 22 is a water stop valve.
- FIG. 4 is a diagram showing an example of a check valve provided in the pump device of FIG. 3, and the check valve operates in the direction of the arrow shown in the figure, and when water flows backward from the right side in the figure, The flow path is closed.
- FIG. 5A is a diagram of a gate valve. Further, as shown in FIG. 5B, the flow path shape when the valve body is stopped halfway becomes a crescent shape, and there is a problem that cavitation is large and impurities are easily caught.
- FIG. 6 is a view showing a butterfly valve. As shown in FIG. 6B, it has a high closing ability and a small opening / closing torque. In the butterfly valve, in the intermediate state between the closed state and the released state, as shown in FIG. 6C, the shape of the flow path becomes two crescents, and there is a problem similar to that of the gate valve.
- FIG. 7 is a view showing a globe valve.
- the fluid flow is S-shaped. It has good closing ability and is used as a flow adjustment, but it tends to generate cavitation and has a high loss factor.
- FIG. 8 is a diagram illustrating an example of a multi-function valve by the present inventor.
- one valve body has the functions of a check valve and a water stop valve, and in the intermediate state between the closed state and the released state, as shown in FIG. It has a quadrangular shape and is characterized by little occurrence of foreign matter, cavitation and noise.
- the present inventor has disclosed a multi-function valve in which a quick-close type check valve, a water stop valve, and a valve body forced movement function are integrated in Patent Document 1, Patent Document 2, Patent Document 3, and Patent Document 4. It is disclosed that the provision reduces the number of parts, which in turn can reduce manufacturing costs and installation costs. However, even the multi-function valve disclosed here does not sufficiently cope with water hammer countermeasures.
- Patent No. 4960520 Japanese Patent No. 5150859 Patent No. 5298281 Japanese Patent Application No. 2014-193709
- the check valve has a flange portion at both ends or one end of the cylinder in order to receive the backflow pressure, and has a structure that always receives the backflow pressure during backflow.
- a multi-function valve that is close to a non-water hammer by providing a water hammer prevention function having a slowly-closing sub-valve that relieves backflow pressure and an air intake valve that operates at negative pressure.
- the quick closing check valve is provided with a water hammer prevention function having a slowly closing sub valve for releasing the backflow pressure at the bottom of the valve body and a negative pressure working air intake valve.
- FIG. 1A is a cross-sectional view
- FIG. 1B is a schematic view.
- 2A is a cross-sectional view of a negative pressure operating air intake valve
- FIG. 2B is a cross-sectional view of a slowly closing sub-valve.
- Diagram showing an example of a gate valve The figure which shows an example of a butterfly valve.
- FIG. 1A is an inflow path
- 2 is an outflow path
- 3 is a retraction path
- 4 is a valve seat
- 5 is a valve body
- 6 is a valve body moving cable
- 7 is a water stop handle
- 8 is a valve body forced movement.
- a handle, 9 is a closing member for the retreat path
- 10 is a slowly closing subvalve
- 11 is a current plate.
- valve body 5 When the valve body 5 is in a pumping state, the flow path is opened away from the valve seat 4 disposed at the branch point by the flow of water, and in the state where the water flow stops and reversely flows, the valve body 5 is always In order to receive the backflow pressure, the cylinder has flanges at both ends or one end of the cylinder so that the backflow pressure is always received. The backflow water is pressed against the valve seat 4 to block the flow path at the branch point. Therefore, it functions as a check valve.
- the water stop handle 7 When it is desired to close the flow path or to adjust the flow rate, the water stop handle 7 is rotated so that the male screw provided on the rod-shaped member constituting the handle is screwed with the male screw.
- the valve element 5 can be pressed against or squeezed to the valve seat 4 by the action of a female screw provided on the member 9.
- valve body forced movement handle 8 is rotated to provide a male screw provided on the rod-shaped member constituting the handle and a screw threaded on the male screw.
- the valve body 5 can be pulled up to the side of the closing member 9 via the valve body moving cable 6 by the action of the female screw provided on the closing member 9, that is, diagonally upward to the left in the drawing.
- FIG. 2 is provided with an air intake valve 13 for sucking outside air in the closing member 9 shown in FIG. 1 (a), and a compression spring of the closing member 9 is attached to the negative pressure in the valve when a water hammer is generated.
- the structure which showed the water hammer prevention function corresponding to the time of a negative pressure by inhaling external air through the through-hole of the part shown is shown.
- Fig. 2 (b) shows that when backflow water is generated, a state close to a non-water hammer is possible by providing a slowly closing sub-valve 10 for releasing the backflow pressure at the bottom of the valve body. Further, the rectification plate 11 is provided to reduce the occurrence of cavitation.
- a multi-function valve having functions of a check valve and a water stop valve, and a function close to that of a non-water hammer, preventing damage to pump equipment and compact. Can contribute to
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Abstract
[Problem] Multi-functional valves have a check valve and water stop valve function, a water hammer prevention function, and a valve body forced movement function for enabling the release of water from inside a valve and resolving poor valve body operation. However, in order to further improve the water hammer prevention function, the present invention provides a multi-functional valve in which a slow-closing auxiliary check valve for discharging reverse flow pressure and a negative-pressure-activated air intake valve are provided to approximate a non water hammer state. [Solution] A pair of magnets and/or compression springs are disposed in a valve body and/or a member for closing an escape path, and a slow-closing auxiliary check valve for discharging reverse flow pressure and a negative-pressure-activated air intake valve are provided to the bottom part of the valve body.
Description
本発明は各種のプラントに用いられる多機能バルフ゛が取付られたポンプ施設に関する。
The present invention relates to a pump facility equipped with a multi-function valve used in various plants.
図３は従来の一般的なポンプ設備の一例を示す図であり、２０はポンプ、２１は逆止弁、２２は止水弁である。図４は、図３のポンプ装置に備えられている逆止弁の一例を示す図であり、逆止弁は、図に示した矢印の方向に作動し、図における右側から水が逆流すると、流路を閉塞する構造となっている。
FIG. 3 is a diagram showing an example of a conventional general pump facility, in which 20 is a pump, 21 is a check valve, and 22 is a water stop valve. FIG. 4 is a diagram showing an example of a check valve provided in the pump device of FIG. 3, and the check valve operates in the direction of the arrow shown in the figure, and when water flows backward from the right side in the figure, The flow path is closed.
また、図５及び図６は、図３のポンプ施設に備えられている止水弁を示した図である。図５（ａ）はゲートバルブの図である。さらに図５（ｂ）に示したように、弁体を途中で止めた際の流路形状が三日月形になり、キャビテーションの発生が大きく、夾雑物が挟まり易いという課題がある。
5 and 6 are views showing the water stop valve provided in the pump facility of FIG. FIG. 5A is a diagram of a gate valve. Further, as shown in FIG. 5B, the flow path shape when the valve body is stopped halfway becomes a crescent shape, and there is a problem that cavitation is large and impurities are easily caught.
図６は、バタフライバルブを示した図である。図６（ｂ）に示したように、高い閉塞能力を有し、開閉トルクが小さい。そしてバタフライバルブにおいては、閉塞と解放の中間の状態では、図６（ｃ）に示したように、流路形状が二つの三日月形になり、ゲートバルブと同様の課題がある。
FIG. 6 is a view showing a butterfly valve. As shown in FIG. 6B, it has a high closing ability and a small opening / closing torque. In the butterfly valve, in the intermediate state between the closed state and the released state, as shown in FIG. 6C, the shape of the flow path becomes two crescents, and there is a problem similar to that of the gate valve.
図７はグローブバルブを示す図である。このバルブにおいては流体の流れはS字状となる。閉止能力がよく、流量調整として使われるが、キャビテーションが発生しやすく、損失係数も高い。
FIG. 7 is a view showing a globe valve. In this valve, the fluid flow is S-shaped. It has good closing ability and is used as a flow adjustment, but it tends to generate cavitation and has a high loss factor.
図８は、本発明者による多機能バルブの一例を示す図である。この多機能バルブは、一つの弁体が、逆止弁と止水弁の機能を備え、閉塞と解放の中間の状態では、図８（ｂ）に示したように、流路形状が円形又は四角形となり、夾雑物の挟まりや、キャビテーション及び騒音の発生が少ないという特徴がある。
FIG. 8 is a diagram illustrating an example of a multi-function valve by the present inventor. In this multi-function valve, one valve body has the functions of a check valve and a water stop valve, and in the intermediate state between the closed state and the released state, as shown in FIG. It has a quadrangular shape and is characterized by little occurrence of foreign matter, cavitation and noise.
また、前記のウォーターハンマー防止にはフライホール付ポンプ、エアーベッセルなどが必要となり、多大なコストを強いられている。
Also, to prevent the above water hammer, a pump with a fly hole, an air vessel and the like are required, which imposes great costs.
この対策として、本発明者は、特許文献１、特許文献２、特許文献３、特許文献４において、急閉式逆止弁、止水弁、弁体強制移動機能を集約してなる多機能弁を提供することで、部品点数の減少し、ひいては製造コストと据付工事費の低減が可能となることを開示している。しかし、ここに開示されている多機能バルブにおいても、ウォーターハンマー対策に十分対応できていないのが実状である。
As a countermeasure, the present inventor has disclosed a multi-function valve in which a quick-close type check valve, a water stop valve, and a valve body forced movement function are integrated in Patent Document 1, Patent Document 2, Patent Document 3, and Patent Document 4. It is disclosed that the provision reduces the number of parts, which in turn can reduce manufacturing costs and installation costs. However, even the multi-function valve disclosed here does not sufficiently cope with water hammer countermeasures.
本発明の課題は、逆止弁は逆流圧を受けるために、円筒の両端又は片端にフランジ部を有し、逆流時は常に逆流圧を受ける構造とし、急閉式逆止弁に弁体底部に逆流圧を逃がす緩閉式副弁と、負圧時に作動する空気吸気弁とを有するウォーターハンマー防止機能を設けてノン・ウォーターハンマーに近い多機能バルブを提供する。
The problem of the present invention is that the check valve has a flange portion at both ends or one end of the cylinder in order to receive the backflow pressure, and has a structure that always receives the backflow pressure during backflow. Provided is a multi-function valve that is close to a non-water hammer by providing a water hammer prevention function having a slowly-closing sub-valve that relieves backflow pressure and an air intake valve that operates at negative pressure.
急閉式逆止弁に、弁体底部に逆流圧を逃がす緩閉式副弁と、負圧時作動空気吸気弁とを有するウォーターハンマー防止機能が設けられてなることを特徴とする。
The quick closing check valve is provided with a water hammer prevention function having a slowly closing sub valve for releasing the backflow pressure at the bottom of the valve body and a negative pressure working air intake valve.
次に、本発明の実施の形態について、具体的な図を参照しながら説明する。
図１（ａ）は、発明に係る多機能バルブの一例を示す断面図である。図１（ａ）において１は流入路、２は流出路、３は退避路、４は弁座、５は弁体、６は弁体移動ケーブル、７は止水ハンドル、８は弁体強制移動ハンドル、９は退避路の閉塞部材、１０は緩閉式副弁、１１は整流板である。 Next, embodiments of the present invention will be described with reference to specific drawings.
Fig.1 (a) is sectional drawing which shows an example of the multifunction valve which concerns on invention. In FIG. 1A, 1 is an inflow path, 2 is an outflow path, 3 is a retraction path, 4 is a valve seat, 5 is a valve body, 6 is a valve body moving cable, 7 is a water stop handle, and 8 is a valve body forced movement. A handle, 9 is a closing member for the retreat path, 10 is a slowly closing subvalve, and 11 is a current plate.
図１（ａ）は、発明に係る多機能バルブの一例を示す断面図である。図１（ａ）において１は流入路、２は流出路、３は退避路、４は弁座、５は弁体、６は弁体移動ケーブル、７は止水ハンドル、８は弁体強制移動ハンドル、９は退避路の閉塞部材、１０は緩閉式副弁、１１は整流板である。 Next, embodiments of the present invention will be described with reference to specific drawings.
Fig.1 (a) is sectional drawing which shows an example of the multifunction valve which concerns on invention. In FIG. 1A, 1 is an inflow path, 2 is an outflow path, 3 is a retraction path, 4 is a valve seat, 5 is a valve body, 6 is a valve body moving cable, 7 is a water stop handle, and 8 is a valve body forced movement. A handle, 9 is a closing member for the retreat path, 10 is a slowly closing subvalve, and 11 is a current plate.
弁体５は、圧送状態では、水の流れによって、分岐点に配されている弁座４から離れて流路を開放し、水流が停止し、逆流したりする状態では、弁体５は常に逆流圧を受けるために、円筒の両端又は片端にフランジ部を有し、常に逆流圧を受ける構造とし、逆流水で、弁座４に圧接され、流路を分岐点で閉塞する。従って逆止弁として機能する。
When the valve body 5 is in a pumping state, the flow path is opened away from the valve seat 4 disposed at the branch point by the flow of water, and in the state where the water flow stops and reversely flows, the valve body 5 is always In order to receive the backflow pressure, the cylinder has flanges at both ends or one end of the cylinder so that the backflow pressure is always received. The backflow water is pressed against the valve seat 4 to block the flow path at the branch point. Therefore, it functions as a check valve.
そして、流路を閉塞したい場合又は流量調整する場合は、止水ハンドル７を回転させることで、ハンドルを構成する棒状部材に設けられた雄ネジと、この雄ネジに螺合するように、閉塞部材９に設けられた雌ネジの作用で、弁体５を弁座４に圧接又は絞ることができる。
When it is desired to close the flow path or to adjust the flow rate, the water stop handle 7 is rotated so that the male screw provided on the rod-shaped member constituting the handle is screwed with the male screw. The valve element 5 can be pressed against or squeezed to the valve seat 4 by the action of a female screw provided on the member 9.
また、弁体固着解除、配管内の水抜き作業が必要になる際は、弁体強制移動ハンドル８を回転させることで、ハンドルを構成する棒状部材に設けられ雄ネジと、この雄ネジに螺合するように、閉塞部材９に設けられた雌ネジの作用で、弁体移動ケーブル６を介して、弁体５を閉塞部材９側へ、つまり図における左斜め上方に引き上げることができる。
In addition, when it is necessary to release the sticking of the valve body and drain the water in the pipe, the valve body forced movement handle 8 is rotated to provide a male screw provided on the rod-shaped member constituting the handle and a screw threaded on the male screw. As a result, the valve body 5 can be pulled up to the side of the closing member 9 via the valve body moving cable 6 by the action of the female screw provided on the closing member 9, that is, diagonally upward to the left in the drawing.
図２は、図１（a）に示した閉塞部材９に、外部の空気を吸入する空気吸気弁１３を設け、ウォーターハンマー発生時のバルブ内負圧に対し、閉塞部材９の圧縮バネを取付けた部分の貫通孔を介して、外部空気を吸入することによって、負圧時対応のウォーターハンマー防止機能を発現するようにした構成を示している。
2 is provided with an air intake valve 13 for sucking outside air in the closing member 9 shown in FIG. 1 (a), and a compression spring of the closing member 9 is attached to the negative pressure in the valve when a water hammer is generated. The structure which showed the water hammer prevention function corresponding to the time of a negative pressure by inhaling external air through the through-hole of the part shown is shown.
図２（ｂ）は逆流水が生じた場合、弁体底部に逆流圧を逃がす緩閉式副弁１０を設けることにより、ノン・ウォーターハンマーに近い状態が可能である。又、整流板１１付きにすることでキャビテーション発生を少なくする。
Fig. 2 (b) shows that when backflow water is generated, a state close to a non-water hammer is possible by providing a slowly closing sub-valve 10 for releasing the backflow pressure at the bottom of the valve body. Further, the rectification plate 11 is provided to reduce the occurrence of cavitation.
以上に説明したように、本発明によれば、逆止弁及び止水弁の機能を備え、ノン・ウォーターハンマーに近い機能をも備えた多機能弁を提供でき、ポンプ設備の損傷防止及びコンパクト化に寄与できる。
As described above, according to the present invention, it is possible to provide a multi-function valve having functions of a check valve and a water stop valve, and a function close to that of a non-water hammer, preventing damage to pump equipment and compact. Can contribute to
１ ・・・ 流入口 ２ ・・・ 流出口 ３ ・・・ 退避路 ４ ・・・ 弁座
５ ・・・ 弁体 ６ ・・・ 弁体移動ケーブル ７ ・・・ 止水ハンドル
８ ・・・ 弁体強制移動ハンドル ９ ・・・ 退避路の閉塞部材
１０ ・・緩閉式副弁 １１ ・・整流板 １３ ・・負圧時作動空気吸気弁
１２ａ，１２ｂ ・・・ 磁石 １４a,１４b ・・・圧縮バネ
２０ ・・・ ポンプ ２１ ・・・ 逆止弁 ２２ ・・・ 止水弁 DESCRIPTION OFSYMBOLS 1 ... Inlet 2 ... Outlet 3 ... Retreat path 4 ... Valve seat 5 ... Valve body 6 ... Valve body moving cable 7 ... Water stop handle 8 ... Valve Body forced movement handle 9 ・ ・ ・ Retraction path blocking member
10 .. Slowly closed sub-valve 11 .. Rectifyingplate 13 .. Working air intake valve 12 a, 12 b during negative pressure ・ ・ ・ Magnet 14 a, 14 b ・ ・ ・ Compression spring 20 ・ ・ ・ Pump 21 ・ ・ ・ Check valve 22 ... Stop valve
５ ・・・ 弁体 ６ ・・・ 弁体移動ケーブル ７ ・・・ 止水ハンドル
８ ・・・ 弁体強制移動ハンドル ９ ・・・ 退避路の閉塞部材
１０ ・・緩閉式副弁 １１ ・・整流板 １３ ・・負圧時作動空気吸気弁
１２ａ，１２ｂ ・・・ 磁石 １４a,１４b ・・・圧縮バネ
２０ ・・・ ポンプ ２１ ・・・ 逆止弁 ２２ ・・・ 止水弁 DESCRIPTION OF
10 .. Slowly closed sub-valve 11 .. Rectifying
Claims (6)
- 逆止弁は弁体と、弁座と、流入路と、前記流入路に連通する流出路と、前記流入路と前記流出路の中間の分岐点で分岐されてなる退避路と、前記退避路を閉塞する閉塞部材とで構成され、前記弁体は逆流圧を受けるために、円筒の両端又は片端にフランジ部を有し、逆流時は常に逆流圧を受ける構造とし、前記弁体は、前記分岐点に設けられてなる前記弁座と前記退避路の間を移動するように配置され、前記流出部の中心線と前記退出路の中心線のなす角が鋭角であり、前記弁体の逆止弁としての機能は、前記弁体の弁座側フランジが受ける前記逆流圧によって前記弁座側に付勢されることにより発現し、前記逆止弁には前記分岐点において前記流入路と前記流出路との間を閉塞する仕切弁機能と流量調整弁機能を兼備し、前記各機能は、前記退避路の前記分岐点と対向する側を閉塞する閉塞部材に設けられてなる雌ネジに螺合されてなる、雄ネジを有する止水ハンドルの回転により発現する構造を特徴とする逆止弁。 The check valve includes a valve body, a valve seat, an inflow path, an outflow path that communicates with the inflow path, a retreat path that is branched at a branch point between the inflow path and the outflow path, and the retreat path. In order to receive the backflow pressure, the valve body has flange portions at both ends or one end of the cylinder, and is configured to always receive the backflow pressure during backflow. It is disposed so as to move between the valve seat provided at the branch point and the retreat path, and the angle formed by the center line of the outflow portion and the center line of the exit path is an acute angle, and the reverse of the valve body The function as a stop valve is expressed by being urged toward the valve seat by the backflow pressure received by the valve seat side flange of the valve body, and the check valve has the inflow path and the It has both a gate valve function and a flow control valve function to block between the outlet and the above-mentioned functions. Becomes screwed into the female screw thus provided for the closing member for closing the side opposite to the branch point of the saving path, a check valve, wherein the structure expressed by the rotation of the water shut-off handle having a male thread.
- 前記逆止弁は前記逆止弁の外部空気を吸気する弁を有し、前記逆止弁内に負圧が発生した時に前記弁によってウォーターハンマー防止機能を発現することを特徴とする、請求項１に記載の逆止弁。 The check valve has a valve that sucks in air outside the check valve, and exhibits a water hammer prevention function by the valve when negative pressure is generated in the check valve. The check valve according to 1.
- 前記逆止弁は緩閉式弁ウォーターハンマー防止機能を有しており、前記ウォーターハンマー防止機能は弁体底部に逆流圧を逃がす副弁を有し、その副弁によって緩閉式弁ウォーターハンマー防止機能を発現することを特徴とする請求項１ないし請求項２のいずれかに記載の逆止弁。 The check valve has a slow-closing valve water hammer prevention function, and the water hammer prevention function has a secondary valve for releasing the backflow pressure at the bottom of the valve body, and the secondary valve has a slow-closing valve water hammer prevention function. The check valve according to claim 1, wherein the check valve is expressed.
- 前記弁体の弁座側底部に整流板が付与されていることを特徴とする、請求項１ないし請求項３のいずれかに記載の逆止弁。 The check valve according to any one of claims 1 to 3, wherein a current plate is provided on a valve seat side bottom of the valve body.
- 前記弁体は、前記閉塞部材に設けられた第二の雌ネジに螺合されてなる、第二の雄ネジを有する水抜ハンドルに接合されたケーブルに緊結され、前記水抜きハンドルの回転により、前記ケーブルを介して退避路に移動されることによって、逆止弁内部の水抜きを可能とする、弁体強制移動機能を有することを特徴とする、請求項１ないし請求項４のいずれかに記載の逆止弁。 The valve body is fastened to a cable joined to a drain handle having a second male screw, which is screwed to a second female screw provided on the closing member, and by rotation of the drain handle, 5. The valve body forcibly moving function that enables water drainage inside the check valve by being moved to the retreat path through the cable is provided. 5. The check valve described.
- 請求項１ないし請求項５のいずれかに記載の逆止弁を有することを特徴とするポンプ施設。 A pump facility comprising the check valve according to any one of claims 1 to 5.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015078946A JP6056067B2 (en) | 2015-04-08 | 2015-04-08 | A multi-function valve having a gate valve and a quick-closing check valve, and a water hammer preventing function having a slow-closing sub-valve and a negative pressure operating air intake valve. |
| JP2015-078946 | 2015-04-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016163344A1 true WO2016163344A1 (en) | 2016-10-13 |
Family
ID=57072052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2016/061062 WO2016163344A1 (en) | 2015-04-08 | 2016-04-05 | Multi-functional valve having water hammer prevention function and having gate valve, fast-closing check valve, slow-closing auxiliary valve, and negative-pressure-activated air intake valve |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6056067B2 (en) |
| WO (1) | WO2016163344A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110735800A (en) * | 2019-11-25 | 2020-01-31 | 扬州江天流量仪表有限公司 | novel micro-resistance slow-closing check valve and operation method thereof |
| CN112856001A (en) * | 2021-02-02 | 2021-05-28 | 黄伟健 | Oil exploitation governing valve |
| CN113474584A (en) * | 2020-01-31 | 2021-10-01 | 株式会社石崎 | Check valve |
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|---|---|---|---|---|
| JPS5214222A (en) * | 1975-07-23 | 1977-02-03 | Kubota Ltd | Check valve used both as hydraulic restraint valve |
| US20050166971A1 (en) * | 2004-01-31 | 2005-08-04 | Gennady Arov | Y-pattern piston check valve, piston valve assembly for a Y-pattern piston check valve, and method |
| JP2006029573A (en) * | 2004-06-18 | 2006-02-02 | Onda Seisakusho Seki Kojo:Kk | Check valve with pressure relaxation structure |
| JP2013221615A (en) * | 2012-04-13 | 2013-10-28 | Acc Tohoku Co Ltd | Header pipe and pump facility |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60211173A (en) * | 1984-04-05 | 1985-10-23 | Yutaka Yamada | Quick-close nonreturn valve with slow-close auxiliary valve |
| JPH0444568U (en) * | 1990-08-22 | 1992-04-15 | ||
| JP3041333U (en) * | 1997-03-11 | 1997-09-19 | 株式会社光明製作所 | Stopcock with check function |
| US20050145809A1 (en) * | 2004-01-05 | 2005-07-07 | Wen-Tsong Lee | Multifunctional valve device |
| JP6002933B2 (en) * | 2012-07-03 | 2016-10-05 | パナソニックＩｐマネジメント株式会社 | Check valve and water heater provided with the same |
-
2015
- 2015-04-08 JP JP2015078946A patent/JP6056067B2/en not_active Expired - Fee Related
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2016
- 2016-04-05 WO PCT/JP2016/061062 patent/WO2016163344A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5214222A (en) * | 1975-07-23 | 1977-02-03 | Kubota Ltd | Check valve used both as hydraulic restraint valve |
| US20050166971A1 (en) * | 2004-01-31 | 2005-08-04 | Gennady Arov | Y-pattern piston check valve, piston valve assembly for a Y-pattern piston check valve, and method |
| JP2006029573A (en) * | 2004-06-18 | 2006-02-02 | Onda Seisakusho Seki Kojo:Kk | Check valve with pressure relaxation structure |
| JP2013221615A (en) * | 2012-04-13 | 2013-10-28 | Acc Tohoku Co Ltd | Header pipe and pump facility |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110735800A (en) * | 2019-11-25 | 2020-01-31 | 扬州江天流量仪表有限公司 | novel micro-resistance slow-closing check valve and operation method thereof |
| CN113474584A (en) * | 2020-01-31 | 2021-10-01 | 株式会社石崎 | Check valve |
| EP3889480A4 (en) * | 2020-01-31 | 2022-10-05 | Ishizaki Co., Ltd. | Check valve |
| US11828373B2 (en) | 2020-01-31 | 2023-11-28 | Ishizaki Co., Ltd. | Check valve |
| CN112856001A (en) * | 2021-02-02 | 2021-05-28 | 黄伟健 | Oil exploitation governing valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6056067B2 (en) | 2017-01-11 |
| JP2016200174A (en) | 2016-12-01 |
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