JP3533448B2 - Pump device with intake and exhaust valves - Google Patents
Pump device with intake and exhaust valvesInfo
- Publication number
- JP3533448B2 JP3533448B2 JP25732599A JP25732599A JP3533448B2 JP 3533448 B2 JP3533448 B2 JP 3533448B2 JP 25732599 A JP25732599 A JP 25732599A JP 25732599 A JP25732599 A JP 25732599A JP 3533448 B2 JP3533448 B2 JP 3533448B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pump
- intake
- discharge pipe
- discharge
- 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
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ポンプ吐出管内の
圧力が大気圧以下で運転するのに好適な吸排気弁を備え
たポンプ装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump device provided with an intake / exhaust valve suitable for operating at a pressure in a pump discharge pipe which is equal to or lower than atmospheric pressure.
【０００２】[0002]
【従来の技術】図５は、従来の排気弁を備えたポンプ装
置の一例の構造図である。図５において、ポンプ装置１
０は、ポンプ吐出管１２に吐出弁１４が設けられ、この
ポンプ吐出管１２の吐出弁１４より上流側に、排気弁１
６が設けられている。この排気弁１６は、図６に示すご
とく、ポンプ吐出管１２内が水などの液体で充満される
とボール弁体１８が浮き上がって連通孔２０を閉塞遮断
するように構成されている。そこで、ポンプ装置１０の
運転開始の際には、まず吐出弁１４が全閉とされ、ポン
プの運転により吸込水槽２２に設けられた揚水管２４内
を水が上昇しポンプ吐出管１２内に水が流入される。こ
こで、ポンプ吐出管１２内の空気は排気弁１６を介して
排出される。さらに、ポンプ吐出管１２内が水で充満さ
れるまで排気弁１６を介して空気が大気に排出される。
そして、ポンプ吐出管１２が水で充満され、ボール弁体
１８が浮き上がって連通孔２０が閉塞され、排気弁１６
が遮断される。すると、ポンプ吐出管１２内の圧力が上
昇する。そこで、吐出弁１４を開いて送水管２６を介し
て水を吐出水槽２８へ送出する。2. Description of the Related Art FIG. 5 is a structural view of an example of a conventional pump device having an exhaust valve. In FIG. 5, the pump device 1
0 is provided with a discharge valve 14 on the pump discharge pipe 12, and the exhaust valve 1 is provided on the upstream side of the discharge valve 14 of the pump discharge pipe 12.
6 is provided. As shown in FIG. 6, the exhaust valve 16 is configured so that when the pump discharge pipe 12 is filled with a liquid such as water, the ball valve body 18 rises to close and block the communication hole 20. Therefore, when the operation of the pump device 10 is started, first, the discharge valve 14 is fully closed, and the water is lifted in the pumping pipe 24 provided in the suction water tank 22 by the operation of the pump, and the water is discharged into the pump discharge pipe 12. Is flowed in. Here, the air in the pump discharge pipe 12 is discharged through the exhaust valve 16. Further, air is exhausted to the atmosphere via the exhaust valve 16 until the pump discharge pipe 12 is filled with water.
Then, the pump discharge pipe 12 is filled with water, the ball valve body 18 rises, the communication hole 20 is closed, and the exhaust valve 16
Is cut off. Then, the pressure in the pump discharge pipe 12 rises. Therefore, the discharge valve 14 is opened and water is sent to the discharge water tank 28 through the water supply pipe 26.
【０００３】かかるポンプ装置１０において、ポンプ吐
出管１２などの一部が、吐出水槽２８の水位よりも高い
位置にある装置にあっては、吐出弁１４が開かれること
で管路抵抗が急激に低下し、ポンプ吐出管１２内の水が
吐出水槽２８側に急激に流れてポンプ吐出管１２内が大
気圧以下となり易い。すると、排気弁１６のボール弁体
１８が落下して連通孔２０が連通され、ポンプ吐出管１
２内に大気が流入する。この結果、いわゆるサイホンブ
レークが生じ、送水量の低下が生じ易い。In such a pump device 10, in a device in which a part of the pump discharge pipe 12 or the like is located at a position higher than the water level of the discharge water tank 28, the discharge valve 14 is opened to suddenly increase the line resistance. The water in the pump discharge pipe 12 suddenly flows toward the discharge water tank 28 side, and the inside of the pump discharge pipe 12 is likely to become atmospheric pressure or less. Then, the ball valve element 18 of the exhaust valve 16 falls and the communication hole 20 is communicated, and the pump discharge pipe 1
Atmosphere flows into 2. As a result, a so-called siphon break occurs, and the water supply amount is likely to decrease.
【０００４】これらのサイホンブレークを防止する従来
技術としては、排気弁１６に逆止弁を直列接続し、ポン
プ吐出管１２内が大気圧以下となってもこの逆止弁によ
り大気が流入しないようにしたものがある。また、サイ
ホンブレークを防止する他の従来技術として、排気弁１
６に代えて電動弁を設け、ポンプの運転状態に応じて電
動弁を適宜に制御するものがある。As a conventional technique for preventing these siphon breaks, a check valve is connected in series to the exhaust valve 16 so that even if the pressure in the pump discharge pipe 12 becomes lower than atmospheric pressure, the check valve prevents atmospheric air from flowing in. There is something I did. As another conventional technique for preventing siphon break, an exhaust valve 1
There is one in which a motor-operated valve is provided in place of 6, and the motor-operated valve is appropriately controlled according to the operating state of the pump.
【０００５】[0005]
【発明が解決しようとする課題】上述の逆止弁を設ける
従来技術にあっては、ポンプ装置１０を運転停止する際
に、逆止弁によりポンプ吐出管１２内に大気の流入がで
きず、ポンプ吐出管１２内の水を落水させることができ
ない。そこで、ポンプ吐出管１２内の真空を破壊するた
めの真空破壊弁をさらに設けなければならず、それだけ
構造が複雑なものになるという不具合があった。In the prior art of providing the above-described check valve, when the pump device 10 is stopped, the check valve prevents air from flowing into the pump discharge pipe 12, The water in the pump discharge pipe 12 cannot be dropped. Therefore, a vacuum break valve for breaking the vacuum in the pump discharge pipe 12 must be additionally provided, and the structure becomes complicated accordingly.
【０００６】また、排気弁１６に代えて電動弁を設ける
従来技術にあっては、ポンプの運転状態に応じて電動弁
を制御するコンピュータや電子回路などからなる制御装
置が必要であり、しかも構造が複雑であるために故障が
生じ易いなどの不具合があった。Further, in the prior art in which an electric valve is provided instead of the exhaust valve 16, a control device including a computer, an electronic circuit and the like for controlling the electric valve according to the operating state of the pump is required and has a structure. However, there is a problem in that the failure is likely to occur due to its complexity.
【０００７】本発明は、かかる従来技術の事情に鑑みて
なされたもので、排気弁に吐出弁の開閉に連動して連通
孔が遮断または連通される吸気弁を直列接続すること
で、簡単な機械的構造により、運転開始の際にサイホン
ブレークを防止できるとともに、運転停止の際にはポン
プ吐出管内を真空破壊して落水させることができるよう
にした吸排気弁を備えたポンプ装置を提供することを目
的とする。The present invention has been made in view of such circumstances of the prior art, and a simple structure is achieved by connecting an exhaust valve in series with an intake valve whose communication hole is blocked or communicated in conjunction with opening and closing of a discharge valve. (EN) Provided is a pump device provided with an intake / exhaust valve capable of preventing siphon break at the start of operation by a mechanical structure, and at the time of stopping operation, capable of breaking the vacuum in the pump discharge pipe to allow water to fall. The purpose is to
【０００８】[0008]
【課題を解決するための手段】かかる目的を達成するた
めに、本発明の吸排気弁を備えたポンプ装置は、ポンプ
吐出管に吐出弁が設けられるとともに前記ポンプ吐出管
の一部が吐出水槽の水位より高い位置にあるポンプ装置
であって、前記ポンプ吐出管の前記吐出弁より上流側
に、前記ポンプ吐出管が液体で充満されると連通孔が遮
断される排気弁と、前記吐出弁の開閉に連動して前記吐
出弁が全閉状態から３０％開けられる以前に連通孔が遮
断されて前記ポンプ吐出管内が大気圧以下となっても大
気が流入できない吸気弁とを直列接続して、前記ポンプ
吐出管内と大気を連通するように構成されている。To achieve the above object, in a pump device having an intake / exhaust valve according to the present invention, a discharge valve is provided in a pump discharge pipe and a part of the pump discharge pipe is a discharge water tank. And a discharge valve upstream of the discharge valve of the pump discharge pipe, the communication hole is blocked when the pump discharge pipe is filled with liquid, and the discharge valve. By connecting the intake valve in series with the intake valve, the communication hole is blocked before the discharge valve is opened 30% from the fully closed state in conjunction with the opening / closing of The inside of the pump discharge pipe is configured to communicate with the atmosphere.
【０００９】そして、前記吸気弁は、前記吐出弁が全閉
状態から７％開けられると、前記連通孔が遮断されるよ
うに構成しても良い。The intake valve may be constructed so that the communication hole is shut off when the discharge valve is opened 7% from the fully closed state.
【００１０】[0010]
【発明の実施の形態】以下、本発明の第１実施例を図１
ないし図３を参照して説明する。図１は、本発明の吸排
気弁を備えたポンプ装置の第１実施例の要部の構造を示
す一部切り欠き図である。図２は、図１で吸気弁の連通
孔が遮断された状態の要部の構造を示す断面拡大図であ
る。図３は、吐出弁の開閉と損失水頭の関係を示す図で
ある。図１および図２において、図５および図６と同じ
または均等な部材には同じ符号を付けて重複する説明を
省略する。BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will now be described with reference to FIG.
Or, it demonstrates with reference to FIG. FIG. 1 is a partially cutaway view showing a structure of a main part of a first embodiment of a pump device having an intake / exhaust valve according to the present invention. FIG. 2 is an enlarged cross-sectional view showing the structure of the main part in the state where the communication hole of the intake valve is blocked in FIG. FIG. 3 is a diagram showing the relationship between the opening and closing of the discharge valve and the head loss. 1 and 2, members that are the same as or equivalent to those in FIGS. 5 and 6 are denoted by the same reference numerals, and redundant description will be omitted.
【００１１】図１および図２において、排気弁１６に直
列に吸気弁３０が接続され、排気弁１６の連通孔２０と
吸気弁３０の連通孔３２を直列に介して、ポンプ吐出管
１２内と大気が連通される。そして、吸気弁３０の連通
孔３２は、ヒンジピン３４により揺動自在な弁体３６で
閉塞遮断および連通制御される。しかも、弁体３６に
は、アーム３８の一端部が一体的に固定され、このアー
ム３８の遊端部にワイヤーを適宜に介して錘４０が連結
されて、この錘４０の重力により弁体３６が連通孔３２
を遮断する方向に付勢されている。In FIG. 1 and FIG. 2, an intake valve 30 is connected in series to the exhaust valve 16, and the inside of the pump discharge pipe 12 is connected through the communication hole 20 of the exhaust valve 16 and the communication hole 32 of the intake valve 30 in series. The atmosphere is communicated. Then, the communication hole 32 of the intake valve 30 is closed and blocked and communication is controlled by a swingable valve element 36 by a hinge pin 34. Moreover, one end of the arm 38 is integrally fixed to the valve body 36, and the weight 40 is connected to the free end of the arm 38 via a wire as appropriate. Is the communication hole 32
Is urged in the direction to shut off.
【００１２】また、吐出弁１４の開閉制御をなす電動バ
ルブアクチュエータ４２の開閉表示計４４のスピンドル
４６に、指示アーム４８の一端部が固定される。この指
示アーム４８は、吐出弁１４の開閉に応じたスピンドル
４６の回転により揺動される。そして、指示アーム４８
の遊端部は、連結アーム５０の一端部に揺動自在に連結
される。この連結アーム５０の他端部側には、アーム３
８が揺動自在に連結される。なお、連結アーム５０の他
端部側には、長さ方向に長孔５２が設けられており、連
結アーム５０とアーム３８の連結点が、この長孔５２内
で連結アーム５０の長さ方向に所定の範囲で相対的に移
動できるようになされている。Further, one end of an instruction arm 48 is fixed to a spindle 46 of an open / close indicator 44 of an electric valve actuator 42 which controls the opening / closing of the discharge valve 14. The instruction arm 48 is swung by the rotation of the spindle 46 according to the opening / closing of the discharge valve 14. Then, the pointing arm 48
The free end of is connected to one end of the connecting arm 50 so as to be swingable. On the other end side of the connecting arm 50, the arm 3
8 is swingably connected. A long hole 52 is provided in the lengthwise direction on the other end side of the connecting arm 50, and the connection point between the connecting arm 50 and the arm 38 is located in the long hole 52 in the lengthwise direction of the connecting arm 50. It is designed to be relatively movable within a predetermined range.
【００１３】そして、吸気弁３０の弁体３６は、吐出弁
１４が全閉状態、すなわち開きが０％で図１のごとく連
通孔３２が全開状態となるように設定されている。そし
て、吐出弁１４の開きが例えば７％になると、図２のご
とく、弁体３６が連通孔３２を全閉状態とするように構
成されている。これは、吐出弁１４の開動作に伴い、指
示アーム４８が揺動して連結アーム５０が図１で右側に
移動され、錘４０により弁体３６が連通孔３２を閉塞す
る方向に揺動される。そして、吐出弁１４の開きが７％
になると、揺動された弁体３６で連通孔３２が閉塞遮断
される。さらに、吐出弁１４が開かれて全開となるまで
指示アーム４８が揺動されて連結アーム５０が図１で右
側に移動されるが、吸気弁３０の連結点が長孔５２内で
移動され、弁体３６が連通孔３２を遮断した状態が維持
される。なお、上記説明において、吐出弁１４の開閉度
合は、全閉状態で開き０％、全開状態で１００％として
表現されている。The valve element 36 of the intake valve 30 is set so that the discharge valve 14 is fully closed, that is, the opening is 0% and the communication hole 32 is fully open as shown in FIG. Then, when the opening of the discharge valve 14 reaches, for example, 7%, the valve body 36 is configured to fully close the communication hole 32 as shown in FIG. This is because with the opening operation of the discharge valve 14, the indicator arm 48 swings, the connecting arm 50 moves to the right side in FIG. 1, and the weight 40 swings the valve body 36 in the direction of closing the communication hole 32. It And the opening of the discharge valve 14 is 7%
Then, the communication hole 32 is closed and blocked by the rocked valve body 36. Further, the indicating arm 48 is swung and the connecting arm 50 is moved to the right side in FIG. 1 until the discharge valve 14 is opened and fully opened, but the connecting point of the intake valve 30 is moved within the elongated hole 52, The state in which the valve body 36 blocks the communication hole 32 is maintained. In the above description, the opening / closing degree of the discharge valve 14 is expressed as 0% open in the fully closed state and 100% in the fully open state.
【００１４】ところで、吐出弁１４の開閉による損失水
頭、すなわち管路抵抗は、図３に示すごとく、例えば吐
出弁４にスルーバルブが用いられるならば、全閉状態か
ら開きが５％まで急激に減少し、開きが７％程度でかな
り低下し、さらに開きが３０％以上ではほぼ変化しな
い、という傾向にある。そこで、吐出弁１４を開くこと
で生じ易いサイホンブレークは、管路抵抗の急激な減少
によるものであることから、吐出弁１４の開きが３０％
となる以前に生じ易い。かかる理由から、本発明では、
吐出弁１４の開きが例えば７％となるときに吸気弁３０
の連通孔３２が遮断されるように設定されている。By the way, as shown in FIG. 3, the loss head due to the opening and closing of the discharge valve 14, that is, the line resistance, rapidly increases from the fully closed state to 5% when the through valve is used as the discharge valve 4. There is a tendency that it decreases, the opening decreases considerably at about 7%, and that the opening hardly changes at 30% or more. Therefore, the siphon break, which is likely to occur when the discharge valve 14 is opened, is due to the sharp decrease in the line resistance.
Is likely to occur before becoming. For this reason, in the present invention,
When the opening of the discharge valve 14 becomes, for example, 7%, the intake valve 30
The communication hole 32 is set to be blocked.
【００１５】かかる構成にあっては、ポンプ装置１０の
運転開始の際には、まず吐出弁１４を全閉状態としてポ
ンプの運転が開始される。この状態では排気弁１６の連
通孔２０および吸気弁３０の連通孔３２は連通した状態
にある。そこで、ポンプ吐出管１２内に水が充満するの
に伴い、ポンプ吐出管１２内の空気は排気弁１６と吸気
弁３０を直列に介して大気に排出される。さらに、ポン
プ吐出管１２内に水が充満すると、ついにはボール弁体
１８が浮き上がって連通孔２０が遮断される。この排気
弁１６の遮断によりポンプ吐出管１２内の圧力が上昇す
る。ここで、吐出弁１４が開かれ、送水管２６を介して
水が吐出水槽２８に送水される。そして、吐出弁１４を
開くことにより急激に損失水頭が減少するが、損失水頭
が極端に小さくなる開き状態で吸気弁３０の連通孔３２
が弁体３６で閉塞遮断される。そこで、この吐出弁１４
の開動作に伴いポンプ吐出管１２内の圧力が大気圧以下
となっても、ポンプ吐出管１２内に大気が流入できず、
サイホンブレークが生じない。もって、送水量の低下を
生ずることがない。In such a configuration, when the operation of the pump device 10 is started, first the discharge valve 14 is fully closed and the operation of the pump is started. In this state, the communication hole 20 of the exhaust valve 16 and the communication hole 32 of the intake valve 30 are in communication with each other. Therefore, as the pump discharge pipe 12 is filled with water, the air in the pump discharge pipe 12 is discharged to the atmosphere through the exhaust valve 16 and the intake valve 30 in series. Further, when the pump discharge pipe 12 is filled with water, the ball valve body 18 finally rises and the communication hole 20 is blocked. By shutting off the exhaust valve 16, the pressure in the pump discharge pipe 12 rises. Here, the discharge valve 14 is opened, and water is supplied to the discharge water tank 28 via the water supply pipe 26. Then, although the head loss is rapidly reduced by opening the discharge valve 14, the communication hole 32 of the intake valve 30 is in an open state in which the head loss is extremely small.
Is closed and blocked by the valve element 36. Therefore, this discharge valve 14
Even if the pressure in the pump discharge pipe 12 becomes equal to or lower than the atmospheric pressure due to the opening operation of, the atmosphere cannot flow into the pump discharge pipe 12,
Siphon break does not occur. As a result, there is no reduction in the amount of water sent.
【００１６】また、ポンプ装置１０を運転停止する際に
は、まず吐出弁１４の閉動作がなされ、これに伴い吸気
弁３０は弁体３６が開方向に揺動されて連通孔３２が連
通される。さらに、ポンプの運転停止によりポンプ吐出
管１２内の圧力が低下し、ポンプ吐出管１２内の水位が
低下するとボール弁体１８が落下して排気弁１６の連通
孔２０が連通される。そこで、ポンプ吐出管１２内が排
気弁１６の連通孔２０と吸気弁３０の連通孔３２を直列
に介して大気と連通される。すると、大気よりポンプ吐
出管１２内に空気が流入し、ポンプ吐出管１２内から簡
単に落水がなされる。When the pump device 10 is stopped, the discharge valve 14 is first closed, and the intake valve 30 is swung in the opening direction so that the communication hole 32 is communicated. It Further, when the operation of the pump is stopped and the pressure in the pump discharge pipe 12 is lowered, and the water level in the pump discharge pipe 12 is lowered, the ball valve body 18 is dropped and the communication hole 20 of the exhaust valve 16 is communicated. Therefore, the inside of the pump discharge pipe 12 is communicated with the atmosphere through the communication hole 20 of the exhaust valve 16 and the communication hole 32 of the intake valve 30 in series. Then, air flows into the pump discharge pipe 12 from the atmosphere, and water is easily dropped from the pump discharge pipe 12.
【００１７】次に、本発明の第２実施例を図４を参照し
て説明する。図４は、本発明の吸排気弁を備えたポンプ
装置の第２実施例の要部の構造を示す一部切り欠き図で
ある。図４において、図１と同じまたは均等な部材には
同じ符号を付けて重複する説明を省略する。Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a partially cutaway view showing the structure of the main part of the second embodiment of the pump device including the intake / exhaust valve of the present invention. In FIG. 4, the same or equivalent members as those in FIG. 1 are designated by the same reference numerals, and a duplicate description will be omitted.
【００１８】図４において、図１に示す構造と相違する
ところは以下の点にある。排気弁１６に直列接続して吸
気弁６０が設けられているが、この吸気弁６０の連通孔
６２がボール弁体６４により閉塞遮断および連通され
る。このボール弁体６４の頂部は、電動バルブアクチュ
エータ４２のスピンドル４６に一端部が固定された指示
アーム４８の遊端部にワイヤー６６を介して連結され
る。このワイヤー６６がガイドローラ６８、６８により
適宜に導かれている。4 is different from the structure shown in FIG. 1 in the following points. An intake valve 60 is provided in series with the exhaust valve 16, and a communication hole 62 of the intake valve 60 is blocked and cut off and communicated by a ball valve body 64. The top of the ball valve body 64 is connected to a free end of a pointing arm 48, one end of which is fixed to the spindle 46 of the electric valve actuator 42, via a wire 66. The wire 66 is appropriately guided by the guide rollers 68, 68.
【００１９】かかる構成の第２実施例にあっては、吐出
弁１４が全閉状態ではボール弁体６４が連通孔６２から
分離するようにワイヤー６６で引き上げられて、連結孔
６２は連通状態にある。そして、吐出弁１４が所定の開
閉度合まで開かれると、指示アーム４８の揺動に伴いワ
イヤー６６が移動してボール弁体６４がその重力により
下降して連通孔６２が閉塞遮断される。さらに、吐出弁
１４が開かれて全開状態となるまでワイヤー６６の弛み
が増加し、ボール弁体６４は連通孔６２を遮断した状態
を維持する。もって、図４に示す第２実施例にあって
も、図１に示す第１実施例と同様の動作が得られる。In the second embodiment having such a construction, when the discharge valve 14 is fully closed, the ball valve body 64 is pulled up by the wire 66 so as to be separated from the communication hole 62, and the connection hole 62 is brought into the communication state. is there. Then, when the discharge valve 14 is opened to a predetermined degree of opening and closing, the wire 66 moves with the swing of the instruction arm 48, the ball valve body 64 descends due to its gravity, and the communication hole 62 is closed and blocked. Further, the slack of the wire 66 increases until the discharge valve 14 is opened to the fully opened state, and the ball valve body 64 maintains the communication hole 62 blocked. Therefore, also in the second embodiment shown in FIG. 4, the same operation as in the first embodiment shown in FIG. 1 can be obtained.
【００２０】なお、吸気弁３０、６０の構造は、上記実
施例に限られるものではなく、吐出弁１４が所定の開閉
度合となったときに連通孔３２、６２が遮断されれば、
いかなる構造であっても良い。そして、吐出弁１４と吸
気弁３０、６０の機械的連結構造は、上記実施例に限ら
れず、リンクおよびギアなどを用いたいかなる構造の連
結機構であっても良い。また、上記実施例では、吐出弁
１４が例えば開きが７％のときに吸気弁３０、６０が遮
断されるように設定されているが、吐出弁１４のバルブ
構造と吐き出し側の送水管２６の管路抵抗および吐出水
槽２８の水位などから、サイホンブレークが生じないよ
うに吸気弁３０、６０が遮断される吐出弁１４の開きを
３０％以下の範囲で適宜に設定すれば良い。さらに、弁
体３６を閉塞遮断方向に付勢する手段は、上記実施例の
ごとく錘４０に限られず、弁体３６自体の重力を利用し
ても良く、また適宜なバネなどにより弾性付勢したもの
であっても良い。The structure of the intake valves 30 and 60 is not limited to the above-mentioned embodiment, but if the communication holes 32 and 62 are shut off when the discharge valve 14 has a predetermined opening / closing degree,
It may have any structure. The mechanical connection structure between the discharge valve 14 and the intake valves 30 and 60 is not limited to the above-mentioned embodiment, and may be any structure of connection structure using links and gears. Further, in the above embodiment, the intake valve 30, 60 is set to be shut off when the discharge valve 14 is opened 7%, for example. However, the valve structure of the discharge valve 14 and the water pipe 26 on the discharge side are The opening of the discharge valve 14 in which the intake valves 30 and 60 are shut off may be appropriately set within a range of 30% or less in order to prevent siphon breaks from the pipe resistance and the water level of the discharge water tank 28. Further, the means for urging the valve body 36 in the closing / blocking direction is not limited to the weight 40 as in the above-described embodiment, and the gravity of the valve body 36 itself may be utilized, and it is elastically urged by an appropriate spring or the like. It may be one.
【００２１】[0021]
【発明の効果】以上説明したように、本発明の吸排気弁
を備えたポンプ装置は構成されているので、以下のごと
き格別な効果を奏する。As described above, since the pump device having the intake / exhaust valve of the present invention is constructed, the following special effects are obtained.
【００２２】請求項１記載の吸排気弁を備えたポンプ装
置にあっては、ポンプの運転開始の際に、吐出弁が全閉
状態から３０％開けられる以前に排気弁に直列接続され
た吸気弁が遮断されるので、吐出弁の開動作に伴い管路
抵抗が低下してポンプ吐出管内の液体が流下して管内の
圧力が大気圧以下となっても、遮断された吸気弁により
ポンプ吐出管内に大気が流入することができず、サイホ
ンブレークが阻止される。したがって、サイホンブレー
クの発生による送水量の低下を防止することができる。
また、ポンプの運転停止の際には、吐出弁が閉塞される
と吸気弁の連通孔が開口されるので、ポンプ吐出管内が
簡単に真空破壊されてポンプ吐出管内に大気が流入で
き、ポンプ吐出管内から確実に落水がなされる。しか
も、吸気弁の遮断および連通制御は、吐出弁に機械的に
連動されているので、その構造が簡単であるとともに故
障を生ずる虞がない。In the pump device having the intake / exhaust valve according to the first aspect, at the time of starting the operation of the pump, the intake valve connected in series to the exhaust valve before the discharge valve is opened 30% from the fully closed state. Since the valve is shut off, even if the pipe line resistance decreases due to the opening operation of the discharge valve and the liquid in the pump discharge pipe flows down and the pressure in the pipe falls below atmospheric pressure, the pump discharges due to the blocked intake valve. Atmosphere cannot flow into the pipe, preventing siphon breaks. Therefore, it is possible to prevent a decrease in the amount of water sent due to the occurrence of a siphon break.
Also, when the pump is stopped, the communication hole of the intake valve is opened when the discharge valve is closed, so the inside of the pump discharge pipe is easily broken and the atmosphere can flow into the pump discharge pipe. Water is surely dropped from inside the pipe. Moreover, the shutoff and communication control of the intake valve is mechanically linked to the discharge valve, so that the structure is simple and there is no risk of failure.
【００２３】請求項２記載の吸排気弁を備えたポンプ装
置にあっては、吐出弁が全閉状態から７％開けられる
と、吸気弁が遮断されるように設定するので、吐出弁の
開きでかなり急激に管路抵抗が減少してポンプ吐出管内
の液体が流下する以前に、吸気弁の連通孔が確実に遮断
され、ポンプ吐出管内に大気が流入してサイホンブレー
クが生ずるのをより確実に阻止することができる。In the pump device having the intake / exhaust valve according to the second aspect, the intake valve is set to be shut off when the discharge valve is opened 7% from the fully closed state, so that the discharge valve is opened. It is more certain that the communication hole of the intake valve will be shut off and the atmosphere will flow into the pump discharge pipe and the siphon break will occur before the liquid flow in the pump discharge pipe flows down sharply. Can be blocked.
【図１】本発明の吸排気弁を備えたポンプ装置の第１実
施例の要部の構造を示す一部切り欠き図である。FIG. 1 is a partially cutaway view showing a structure of a main part of a first embodiment of a pump device having an intake / exhaust valve according to the present invention.
【図２】図１で吸気弁の連通孔が遮断された状態の要部
の構造を示す断面拡大図である。FIG. 2 is an enlarged cross-sectional view showing the structure of the main part in a state where the communication hole of the intake valve is blocked in FIG.
【図３】吐出弁の開閉と損失水頭の関係を示す図であ
る。FIG. 3 is a diagram showing a relationship between opening / closing of a discharge valve and head loss.
【図４】本発明の吸排気弁を備えたポンプ装置の第２実
施例の要部の構造を示す一部切り欠き図である。FIG. 4 is a partially cutaway view showing a structure of a main part of a second embodiment of a pump device having an intake / exhaust valve according to the present invention.
【図５】従来の排気弁を備えたポンプ装置の一例の構造
図である。FIG. 5 is a structural diagram of an example of a conventional pump device including an exhaust valve.
【図６】図５で排気弁が遮断された状態の要部の構造を
示す断面拡大図である。FIG. 6 is an enlarged cross-sectional view showing the structure of the main part in a state where the exhaust valve is shut off in FIG.
１０ ポンプ装置 １２ ポンプ吐出管 １４ 吐出弁 １６ 排気弁 １８、６４ ボール弁体 ２０、３２、６２ 連通孔 ３０、６０ 吸気弁 ３４ ヒンジピン ３６ 弁体 ３８ アーム ４０ 錘 ４６ スピンドル ４８ 指示アーム ５０ 連結アーム ５２ 長孔 ６６ ワイヤー ６８ ガイドローラ 10 Pump device 12 Pump discharge pipe 14 Discharge valve 16 Exhaust valve 18,64 ball valve 20, 32, 62 communication holes 30,60 intake valve 34 Hinge pin 36 valve body 38 arms 40 weights 46 spindle 48 indicating arm 50 connecting arm 52 long hole 66 wire 68 Guide roller
───────────────────────────────────────────────────── フロントページの続き (72)発明者 石井 誠 東京都大田区大森北１丁目５番１号 株 式会社電業社機械製作所内 (56)参考文献 特開 平６−323246（ＪＰ，Ａ) 特開 平11−132181（ＪＰ，Ａ) 特開 平６−185488（ＪＰ，Ａ) 特開 平５−312180（ＪＰ，Ａ) 特開 昭52−114102（ＪＰ，Ａ) 実公 昭38−7283（ＪＰ，Ｙ１) (58)調査した分野(Int.Cl.7，ＤＢ名) F04D 13/16 F04D 9/00 ─────────────────────────────────────────────────── ───Continued from the front page (72) Inventor Makoto Ishii 1-5-1, Omorikita, Ota-ku, Tokyo Inside the Denki Kogyo Seisakusho Co., Ltd. (56) Reference JP-A-6-323246 (JP, A) Kaihei 11-132181 (JP, A) JP 6-185488 (JP, A) JP 5-312180 (JP, A) JP 52-114102 (JP, A) JP 38-7283 ( JP, Y1) (58) Fields investigated (Int.Cl. 7 , DB name) F04D 13/16 F04D 9/00
Claims (2)
もに前記ポンプ吐出管の一部が吐出水槽の水位より高い
位置にあるポンプ装置であって、前記ポンプ吐出管の前
記吐出弁より上流側に、前記ポンプ吐出管が液体で充満
されると連通孔が遮断される排気弁と、前記吐出弁の開
閉に連動して前記吐出弁が全閉状態から３０％開けられ
る以前に連通孔が遮断されて前記ポンプ吐出管内が大気
圧以下となっても大気が流入できない吸気弁とを直列接
続して、前記ポンプ吐出管内と大気を連通するように構
成したことを特徴とする吸排気弁を備えたポンプ装置。1. A pump device in which a discharge valve is provided in a pump discharge pipe and a part of the pump discharge pipe is located at a position higher than a water level of a discharge water tank, the pump device being located upstream of the discharge valve in the pump discharge pipe. An exhaust valve that blocks a communication hole when the pump discharge pipe is filled with a liquid, and a communication hole that is closed before the discharge valve is opened 30% from the fully closed state in association with opening and closing of the discharge valve. And an intake / exhaust valve, characterized in that an intake valve, into which atmospheric air cannot flow even if the pressure in the pump discharge pipe becomes equal to or lower than atmospheric pressure, is connected in series to communicate the inside of the pump discharge pipe with the atmosphere. Pump device.
装置において、前記吸気弁は、前記吐出弁が全閉状態か
ら７％開けられると、前記連通孔が遮断されるように構
成したことを特徴とする吸排気弁を備えたポンプ装置。2. A pump device including an intake / exhaust valve according to claim 1, wherein the intake valve is configured to block the communication hole when the discharge valve is opened 7% from a fully closed state. A pump device provided with an intake / exhaust valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25732599A JP3533448B2 (en) | 1999-09-10 | 1999-09-10 | Pump device with intake and exhaust valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25732599A JP3533448B2 (en) | 1999-09-10 | 1999-09-10 | Pump device with intake and exhaust valves |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001082376A JP2001082376A (en) | 2001-03-27 |
| JP3533448B2 true JP3533448B2 (en) | 2004-05-31 |
Family
ID=17304802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25732599A Expired - Lifetime JP3533448B2 (en) | 1999-09-10 | 1999-09-10 | Pump device with intake and exhaust valves |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3533448B2 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52114102A (en) * | 1976-03-22 | 1977-09-24 | Ebara Corp | Pump inlet/outlet valve |
| JPH05312180A (en) * | 1992-04-30 | 1993-11-22 | Yoshikura Kogyo Kk | Vertical pump facility |
| JPH06185488A (en) * | 1992-12-22 | 1994-07-05 | Todoroki Sangyo Kk | Deaerating mechanism for liquid pump device |
| JPH06323246A (en) * | 1993-05-14 | 1994-11-22 | Fuji Electric Co Ltd | Pump device and its check valve |
| JP3363362B2 (en) * | 1997-10-31 | 2003-01-08 | 新明和工業株式会社 | Submersible pump unit with backflow prevention device |
-
1999
- 1999-09-10 JP JP25732599A patent/JP3533448B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001082376A (en) | 2001-03-27 |
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