JPH01164879A - Two stage change-over type liquid level regulator valve - Google Patents
Two stage change-over type liquid level regulator valveInfo
- Publication number
- JPH01164879A JPH01164879A JP32017587A JP32017587A JPH01164879A JP H01164879 A JPH01164879 A JP H01164879A JP 32017587 A JP32017587 A JP 32017587A JP 32017587 A JP32017587 A JP 32017587A JP H01164879 A JPH01164879 A JP H01164879A
- Authority
- JP
- Japan
- Prior art keywords
- liquid level
- valve
- low
- main valve
- pressure chamber
- 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.)
- Granted
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 169
- 239000012530 fluid Substances 0.000 claims description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 230000007423 decrease Effects 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Float Valves (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、二次側下流に設けられた液槽の液位を高低２
段に調整する二段切換式液位調整弁に関する。[Detailed Description of the Invention] [Industrial Field of Application] The present invention provides a method for adjusting the liquid level of a liquid tank provided downstream of a secondary side into two levels: high and low.
This invention relates to a two-stage switching liquid level adjustment valve that adjusts the level in stages.
従来、上水道などの送水圧力を、下流側の使用量に応じ
て自動的に高低二段に切換える圧力制御弁が知られてい
る（特公昭５６−２７８９３号公報、同５９−２９８８
７号公報、実開昭６１−５５７１１号公報参照）。これ
らは、−次側の圧力と二次側の圧力との差圧を利用して
主弁体の開度を調整するもので、−次側の流体を圧力室
に導入するとともに、該圧力室を二次側に連通させ、こ
れに高低２段の圧力に設定されたパイロット弁と、主弁
体の開度に応じて開閉する切換弁とを組合わせて、使用
量の変化、即ち二次側の圧力の変化に応じて主弁体の開
度を高低２段に調整していた。Conventionally, pressure control valves have been known that automatically switch the water supply pressure of water supplies, etc., into two high and low stages depending on the amount of water used on the downstream side (Japanese Patent Publications No. 56-27893, No. 59-2988).
(See Publication No. 7 and Japanese Utility Model Application No. 61-55711). These are used to adjust the opening degree of the main valve body using the differential pressure between the pressure on the downstream side and the pressure on the secondary side. is connected to the secondary side, and this is combined with a pilot valve set to two high and low pressures and a switching valve that opens and closes depending on the opening degree of the main valve body, to prevent changes in usage, that is, secondary The opening degree of the main valve body was adjusted in two stages, high and low, according to changes in side pressure.
しかしながら、二次側、即ち弁の下流側に液槽を有する
設備では、二次側の圧力が液槽の液位による圧力となる
ため、圧力変化が小さく、そのままでは対応することが
できなかった。また液槽内を常時一定の液位に保つ液位
調整弁では、液槽からの導出量が少ない場合に液槽内で
の流体の滞留時間が長くなり、流体が変質するなどのお
それがあった。However, in equipment that has a liquid tank on the secondary side, that is, the downstream side of the valve, the pressure on the secondary side is determined by the liquid level in the liquid tank, so pressure changes are small and cannot be handled as is. . In addition, with a liquid level adjustment valve that always maintains a constant liquid level in the liquid tank, if the amount drawn out from the liquid tank is small, the residence time of the fluid in the liquid tank becomes long, and there is a risk that the fluid may change in quality. Ta.
そこで本発明は、弁の二次側に設けられた液槽の液位を
流体の導出量に応じて高低２段に調整できる二段切換式
液位調整弁を提供することを目的としている。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a two-stage switching liquid level adjustment valve that can adjust the liquid level in a liquid tank provided on the secondary side of the valve to two levels, high and low, depending on the amount of fluid discharged.
即ち、本発明は、主弁の弁口を開閉する主弁体と、主弁
の一次側の流体が導入される圧力室とを備え、該圧力室
の流体をパイロット配管により所定量導出して圧力室の
圧力を変化させることにより、前記主弁体の開度を変化
させて主弁の流量を調整し、該主弁の下流に設けられた
液槽の液位を、該液槽からの導出量に応じて高低２段に
調整する二段切換式液位調整弁であって、前記液槽内の
低液位と高液位の所定位置に、液位の変化により開閉す
る低液位側パイロット弁と高液位側パイロット弁をそれ
ぞれ配設し、前記圧力室と低液位側パイロット弁とを低
液位側パイロット配管で接続するとともに、圧力室と高
液位側パイロット弁とを、前記主弁体の開度に応じて開
弁する切換弁を設けた高液位側パイロット配管で接続し
たことを特徴とする。That is, the present invention includes a main valve body that opens and closes the valve port of the main valve, and a pressure chamber into which fluid on the primary side of the main valve is introduced, and a predetermined amount of fluid in the pressure chamber is drawn out through a pilot pipe. By changing the pressure in the pressure chamber, the opening degree of the main valve body is changed to adjust the flow rate of the main valve, and the liquid level in the liquid tank provided downstream of the main valve is adjusted to the level of the liquid from the liquid tank. A two-stage liquid level adjustment valve that adjusts in two stages, high and low, depending on the amount of liquid drawn out, and a low liquid level that opens and closes according to changes in liquid level at predetermined positions of low liquid level and high liquid level in the liquid tank. A side pilot valve and a high liquid level side pilot valve are respectively arranged, and the pressure chamber and the low liquid level side pilot valve are connected by a low liquid level side pilot piping, and the pressure chamber and the high liquid level side pilot valve are connected. , it is characterized in that it is connected by a high liquid level side pilot pipe provided with a switching valve that opens according to the opening degree of the main valve body.
以上のように構成することにより、液槽からの導出量、
即ち下流側での流体の使用量が少ない場合には液槽内の
液位を低く、また導出量が多い場合には液位を高く切換
えることができる。By configuring as above, the amount extracted from the liquid tank,
That is, when the amount of fluid used on the downstream side is small, the liquid level in the liquid tank can be changed to a low level, and when the amount of fluid to be drawn out is large, the liquid level can be changed to a high level.
以下、本発明の一実施例を図面に基づいて説明する。 Hereinafter, one embodiment of the present invention will be described based on the drawings.
上水道の給水管路等に設けられた液槽１の上流側に配置
される二段切換式液位調整弁２は、主弁３と、該主弁３
の開閉を制御する制御部分とからなるもので、主弁３は
、弁箱４の内部が隔壁５により一次側弁室６と二次側弁
室７とに区画形成されており、該隔壁５に一次側弁室６
と二次側弁室７とを連通する弁口８が設けられ、該弁口
８に主弁体９が垂直方向に摺動可能に嵌挿されている。A two-stage switching liquid level adjustment valve 2 arranged on the upstream side of a liquid tank 1 installed in a water supply pipe or the like includes a main valve 3 and a main valve 3.
The main valve 3 has a valve box 4 whose interior is divided into a primary valve chamber 6 and a secondary valve chamber 7 by a partition wall 5. primary side valve chamber 6
A valve port 8 is provided which communicates the valve chamber 7 with the secondary valve chamber 7, and a main valve body 9 is fitted into the valve port 8 so as to be vertically slidable.
ざらに弁箱４の上部には、上記主弁体９を開閉させるた
めの圧力室１０を画成するダイヤフラム１１が設けられ
ており、該ダイヤフラム１１を、主弁体９とダイヤフラ
ム押え１２とで挟持している。また前記ダイヤフラム押
え１２の上面中央には、切換弁１３の弁体１４を開くた
めの弁軸１５が植設されている。この弁軸１５は、弁箱
４上部に設（プられ１＝弁軸軸受ジ１６により上下方向
に移動可能に保持されるもので、下方を小径とした円錐
状に形成されており、弁軸受け１６の下部との間に僅か
な間隙が形成されている。A diaphragm 11 defining a pressure chamber 10 for opening and closing the main valve body 9 is provided at the top of the valve box 4. The diaphragm 11 is held between the main valve body 9 and a diaphragm retainer 12. It's being held in place. Further, a valve shaft 15 for opening the valve body 14 of the switching valve 13 is installed in the center of the upper surface of the diaphragm retainer 12. The valve shaft 15 is installed in the upper part of the valve box 4 and is held movably in the vertical direction by a valve shaft bearing 16, and is formed in a conical shape with a smaller diameter at the bottom. A slight gap is formed between the lower part of 16 and the lower part of 16.
上記切換弁１３は、弁箱１７の内部に上下に移動【■能
で流体の通孔１８ａを有する案内筒１８が嵌挿されてお
り、該案内筒１８の下端部に設けられた弁体１４により
上部弁室１つと下部弁室２０とに画成されている。弁体
１４は、前記主弁体９が開いて弁軸１５が上昇すること
により、弁軸１５の上端で押し上げられて開弁じ、上部
弁室１９と下部弁室２０を連通させるもので、閉弁は、
弁体１４の重量及び上部弁室１９に導入される流体の圧
力により行われる。また上記案内筒１８を調節棒２１に
より上下させることで弁軸１５と弁体１４との距離を調
整することができ、主弁体９の開度と切換弁１３の弁体
１４が開くタイミングを調節することができる。The switching valve 13 is fitted with a guide tube 18 having a vertically movable fluid passage hole 18a inside the valve box 17, and a valve body 14 provided at the lower end of the guide tube 18. The valve chamber is defined by one upper valve chamber and a lower valve chamber 20. When the main valve body 9 opens and the valve stem 15 rises, the valve body 14 is pushed up by the upper end of the valve stem 15 to open the valve, and communicates the upper valve chamber 19 and the lower valve chamber 20. The valve is
This is done by the weight of the valve body 14 and the pressure of the fluid introduced into the upper valve chamber 19. In addition, by moving the guide cylinder 18 up and down with the adjustment rod 21, the distance between the valve shaft 15 and the valve body 14 can be adjusted, and the opening degree of the main valve body 9 and the timing at which the valve body 14 of the switching valve 13 opens can be adjusted. Can be adjusted.
一方前記液槽１は、−側に主弁３の二次側弁室７と連通
ずる導入口２２が設けられ、他側に流体の使用設備に連
通ずる導出口２３が設けられている。また液槽１内の所
定の位置には、低液位と高液位の所定位置に低液位側パ
イロット弁２４と高液位側パイロット弁２５がそれぞれ
設けられている。On the other hand, the liquid tank 1 is provided with an inlet 22 communicating with the secondary valve chamber 7 of the main valve 3 on the minus side, and an outlet 23 communicating with the fluid usage equipment on the other side. Furthermore, a low liquid level side pilot valve 24 and a high liquid level side pilot valve 25 are provided at predetermined positions in the liquid tank 1 at predetermined positions for a low liquid level and a high liquid level, respectively.
この両パイロット弁２４．２５には、第２図に示すよう
なニードル弁型のボールタップが用いられている。即ち
、両パイロット弁２４．２５は、弁座２６に離接する弁
体２７の先端部を円錐状に＝ ７ −
形成するとともに、該弁体２７の弁軸２８を弁軸受け２
９に螺合させ、浮子３０の上下動を弁軸２８の回転に変
換して弁軸２８を進退させ、開閉するように形成されて
いる。これにより、弁体２７先端部の・円錐面の角度あ
るいは弁軸２８と弁軸受【プ２９の間のねじ部のリード
を適宜に設定することで、浮子３０の上下動、即ち液位
の変化に応じた弁開度を得ることができる。さらに浮子
３０の細かな上下動が弁体２７に直接作用しないため、
ハンチング等を起重ことがなく、安定した作動を行うこ
とができる。Both pilot valves 24 and 25 use needle valve type ball taps as shown in FIG. That is, in both pilot valves 24 and 25, the tip of the valve body 27 that approaches and separates from the valve seat 26 is formed into a conical shape, and the valve shaft 28 of the valve body 27 is connected to the valve bearing 2.
9, the vertical movement of the float 30 is converted into rotation of the valve shaft 28, and the valve shaft 28 is moved forward and backward to open and close. As a result, by appropriately setting the angle of the conical surface of the tip of the valve body 27 or the lead of the threaded part between the valve shaft 28 and the valve bearing 29, the vertical movement of the float 30, that is, the change in the liquid level. It is possible to obtain the valve opening degree according to the Furthermore, since the fine vertical movement of the float 30 does not directly act on the valve body 27,
Stable operation is possible without any hunting or other problems.
そして前記主弁３の一次側弁室６と圧力室１０は、間に
ストレーナ３１を配したバイパス管３２及び前記弁箱４
上部の弁軸受け１６と弁軸１５の間の間隙を介して連通
しており、圧力室１０と低液位側パイロン１−弁２４と
は、低液位側パイロット配管３３で接続されている。ま
た、圧力室１０と高液位側パイロット弁２５とは、前記
切換弁１３を介して高液位側パイロット配管３４で接続
されている。尚、本実施例では、圧力室１０からの配管
３５を途中で分岐して一方を低液位側パイロット配管３
３、他方を高液位側パイロット配管３４としているが、
それぞれ独立して圧力室１０と連通させてもよい。The primary valve chamber 6 of the main valve 3 and the pressure chamber 10 are connected to a bypass pipe 32 with a strainer 31 therebetween and the valve box 4.
The upper valve bearing 16 and the valve shaft 15 communicate through a gap, and the pressure chamber 10 and the low liquid level side pylon 1-valve 24 are connected by a low liquid level side pilot pipe 33. Further, the pressure chamber 10 and the high liquid level side pilot valve 25 are connected via the switching valve 13 through a high liquid level side pilot pipe 34 . In this embodiment, the piping 35 from the pressure chamber 10 is branched in the middle, and one side is connected to the low liquid level side pilot piping 3.
3. The other side is the high liquid level side pilot pipe 34,
They may be communicated with the pressure chamber 10 independently.
これにより、−次側の流体は、主弁体９を介して一次側
弁室６から二次側弁室７を通って液槽１に流入するとと
もに、その一部が、−次側弁室６→バイパス管３２→弁
軸受け１６→圧力室１０と流れ、圧力室１０から、圧力
室１０→低液位側パイロット配管３３→低液位側パイロ
ツ１−弁２４と流れる低液位側の流れと、圧力室１０→
切換弁１３の上部弁室１９→下部弁室２０→高液位側パ
イロット配管３４→高液位側パイロット弁２５と流れる
高液位側の流れとなる。As a result, the fluid on the downstream side flows from the primary valve chamber 6 through the secondary valve chamber 7 through the main valve body 9 into the liquid tank 1, and a part of the fluid flows into the downstream valve chamber 7. 6→Bypass pipe 32→Valve bearing 16→Pressure chamber 10, and from the pressure chamber 10, the flow on the low liquid level side flows from the pressure chamber 10→Low liquid level side pilot pipe 33→Low liquid level side pilot 1-valve 24 And pressure chamber 10 →
The flow is on the high liquid level side in the order of the upper valve chamber 19 of the switching valve 13 → the lower valve chamber 20 → the high liquid level side pilot pipe 34 → the high liquid level side pilot valve 25.
次に、このように構成された二段切換式液位調整弁２の
作動状態を説明する。Next, the operating state of the two-stage switching liquid level adjusting valve 2 configured as described above will be explained.
まず液槽１内が空の場合、低液位側パイロット弁２４及
び高液位側パイロット弁２５の浮子３０は、それぞれ最
も下がった位置に回動しており、両者共、開弁状態とな
っている。First, when the liquid tank 1 is empty, the floats 30 of the low liquid level side pilot valve 24 and the high liquid level side pilot valve 25 are rotated to their lowest positions, and both are in the open state. ing.
また主弁体９は、自重により弁口８を開基した状態とな
っている。この時−次側の上流の弁（図示せず）を開放
して流体を流すと、流体は、−次側弁室６に流入すると
ともにバイパス管３２から圧力室１０に流入する。この
圧力室１０に流入した流体は、低液位側パイロット配管
３３から低液位側パイロット弁２４に流れ、液槽１内に
流下する。この流れにより圧力室１０内の圧力が一次側
弁室６より低下し、両室６，１０の間に差圧が生−じ、
−次側弁室６内の流体がダイヤフラム１１を押し上げて
主弁体９を上昇させ、弁口８を開いて流体を二次側弁室
７から液槽１に送出する。Further, the main valve body 9 is in a state in which the valve port 8 is opened due to its own weight. At this time, when an upstream valve (not shown) on the next side is opened to allow fluid to flow, the fluid flows into the next side valve chamber 6 and also flows into the pressure chamber 10 from the bypass pipe 32. The fluid that has entered the pressure chamber 10 flows from the low-level pilot pipe 33 to the low-level pilot valve 24 and flows down into the liquid tank 1 . Due to this flow, the pressure in the pressure chamber 10 is lower than that in the primary valve chamber 6, and a pressure difference is generated between the two chambers 6 and 10.
- The fluid in the downstream valve chamber 6 pushes up the diaphragm 11 and raises the main valve body 9, opens the valve port 8, and sends the fluid from the secondary valve chamber 7 to the liquid tank 1.
また主弁体９の上昇により、切換弁１３の弁体１４が弁
軸１５により押し上げられ、切換弁１３も開弁し、圧力
室１０の流体が、切換弁１３を経て高液位側パイロット
配管３４から高液位側パイロット弁２５に流れ、液槽１
内に流下する。In addition, as the main valve body 9 rises, the valve body 14 of the switching valve 13 is pushed up by the valve shaft 15, the switching valve 13 also opens, and the fluid in the pressure chamber 10 passes through the switching valve 13 to the high liquid level side pilot pipe. 34 to the high liquid level side pilot valve 25, and the liquid tank 1
flow down inside.
液槽１内の液位がＬｌから１２．Ｌ３に上昇すると低液
位側パイロット弁２４の浮子３０が上昇して弁体２７を
回動させ、低液位側パイロット弁２４の弁口２６を閉じ
る。しかし切換弁１３が開弁していることと、高液位側
パイロット弁２５が開弁していることにより、圧力室１
０内の流体の流出が続き、主弁体９の開弁状態が維持さ
れ、液槽１への流体の送出を継続する。The liquid level in the liquid tank 1 is from Ll to 12. When it rises to L3, the float 30 of the low liquid level side pilot valve 24 rises, rotates the valve body 27, and closes the valve port 26 of the low liquid level side pilot valve 24. However, because the switching valve 13 is open and the high liquid level side pilot valve 25 is open, the pressure chamber 1
The fluid in the tank 0 continues to flow out, the main valve body 9 is maintained in the open state, and the fluid continues to be delivered to the liquid tank 1.
液槽１内の液位がさらに上昇し、液槽１内が高液位状態
Ｈ３となると高液位側パイロット弁２５が閉じ、圧力室
１０内の流体の流出が停止するため、圧力室１０内の圧
力が上昇して圧力室１０側からダイヤフラム１１を押圧
し、主弁体９を押し下げて弁口８を閉じる。When the liquid level in the liquid tank 1 further rises and the liquid tank 1 reaches a high liquid level state H3, the high liquid level side pilot valve 25 closes and the outflow of the fluid in the pressure chamber 10 is stopped. The internal pressure rises and presses the diaphragm 11 from the pressure chamber 10 side, pushing down the main valve body 9 and closing the valve port 8.
この主弁体９の閉弁は、両室６，１０に面するダイヤフ
ラム１１の面積差、主弁体９の自重、流体の圧力等によ
り行われる。また主弁体９の弁軸１５と切換弁１３の弁
体１４との距離によっては、高液位側パイロット弁２５
からの流出量と圧力室１０の圧力とのバランスにより、
主弁体９が下降し、切換弁１３の弁体１４が閉弁するこ
とで高液位側パイロット配管３４からの流れが止まり、
主弁体９の閉じ作動を行うこともある。This closing of the main valve body 9 is performed based on the area difference between the diaphragms 11 facing the two chambers 6 and 10, the weight of the main valve body 9, the pressure of the fluid, and the like. Also, depending on the distance between the valve shaft 15 of the main valve body 9 and the valve body 14 of the switching valve 13, the high liquid level side pilot valve 25
Due to the balance between the outflow amount and the pressure in the pressure chamber 10,
The main valve body 9 descends and the valve body 14 of the switching valve 13 closes, thereby stopping the flow from the high liquid level side pilot pipe 34.
The main valve body 9 may be closed.
このように高液位Ｈ３とされた液槽１内の流体が下流の
設備で使用されて液槽１から導出され、液位が８２．Ｈ
ｌと低下すると、まず高液位側パイロット弁２５が開弁
するが、切換弁１３が閉じているため圧力室１０の流体
は流出せず、主弁体９も作動しない。液位がさらにＬ３
以下に低下し、低液位側パイロット弁２４が開弁すると
、その開度に応じて圧力室１０内の流体が低液位側パイ
ロット配管３３を経て流出するため、圧力室１０の圧力
が低下して主弁体９が上昇し、流体の送給を開始する。The fluid in the liquid tank 1, which has reached the high liquid level H3 in this way, is used in downstream equipment and drawn out from the liquid tank 1, and the liquid level reaches 82. H
When the pressure drops to 1, the high-level pilot valve 25 opens first, but since the switching valve 13 is closed, the fluid in the pressure chamber 10 does not flow out, and the main valve body 9 does not operate. The liquid level is further L3
When the liquid level drops below and the low liquid level side pilot valve 24 opens, the fluid in the pressure chamber 10 flows out through the low liquid level side pilot pipe 33 according to the opening degree, so the pressure in the pressure chamber 10 decreases. Then, the main valve body 9 rises and starts feeding fluid.
この時、使用量が僅かで液位の低下速度が小さければ低
液位側パイロット弁２４の開度が小さいまま、即ち圧力
室１０からの流体の流出が少なく、主弁体９の開度が小
さい状態で液槽１の流入量と流出量がバランスし、液槽
１内をＬ３乃至Ｌ２の範囲の低液位状態に維持する。At this time, if the amount used is small and the rate of decrease in the liquid level is small, the opening degree of the low liquid level side pilot valve 24 remains small, that is, the outflow of fluid from the pressure chamber 10 is small, and the opening degree of the main valve body 9 decreases. In a small state, the inflow and outflow of the liquid tank 1 are balanced, and the inside of the liquid tank 1 is maintained at a low liquid level in the range of L3 to L2.
このように低液位でバランスした状態で上流側の使用量
が増大して、液槽１内の液位がＬｌに低下すると、低液
位側パイロット弁２４の開度が大ぎくなり、圧力室１０
からの流体の流出量が増し、主弁体９が大きく開くため
、弁軸１５が切換弁１３の弁体１４を押し上げて切換弁
１３を開弁する。When the amount used on the upstream side increases and the liquid level in the liquid tank 1 drops to Ll in a state where the liquid level is balanced at a low liquid level, the opening degree of the low liquid level side pilot valve 24 becomes large and the pressure increases. room 10
As the amount of fluid flowing out increases and the main valve body 9 opens widely, the valve shaft 15 pushes up the valve body 14 of the switching valve 13 and opens the switching valve 13.
これにより高液位側パイロット弁２５からの流体の流出
が開始され、圧力室１０内の圧力が大きく低下するため
、主弁体９がさらに開き、全開状態となって流体の送給
を行う。そして液槽１内の液位が１３以上に高まり、低
液位側パイロット弁２４が閉じても高液位側パイロット
弁２５がらの流体の流出により、主弁体９の開弁状態が
維持される。As a result, fluid starts to flow out from the high-level pilot valve 25, and the pressure within the pressure chamber 10 decreases significantly, so that the main valve body 9 further opens and enters a fully open state to supply fluid. Even if the liquid level in the liquid tank 1 rises to 13 or more and the low liquid level side pilot valve 24 closes, the main valve body 9 remains open due to the fluid flowing out from the high liquid level side pilot valve 25. Ru.
液位がざらにＨ１以上に上昇して高液位側パイロット弁
２５を閉じ始めると、圧力室１ｏがらの流体の流出量が
減少するため、圧力室１ｏ内の圧力が高まり主弁体９を
閉じ方向に移動させる。これにより、流体の送給量が液
槽１がらの導出量に見合う量となり、液槽内の液位がＨ
ｌ乃至Ｈ２の間でバランスして高液位を維持する。When the liquid level roughly rises above H1 and the high liquid level side pilot valve 25 begins to close, the amount of fluid flowing out from the pressure chamber 1o decreases, so the pressure inside the pressure chamber 1o increases and the main valve body 9 is closed. Move in the closing direction. As a result, the amount of fluid supplied is equal to the amount drawn out from the liquid tank 1, and the liquid level in the liquid tank becomes H.
Maintain a high liquid level by balancing between 1 and H2.
この状態で使用量が減少すると液槽１内の液位がＨ３に
上昇し、高液位側パイロット弁２５が閉じ、圧力室１０
内の圧力を上げて主弁体９を閉じ−１５＝
る。そして液位が低液位側パイロット弁２４を開＜１３
の位置まで低下すると、前述のごとく、１２〜Ｌ３の低
液位でのバランスがとられ、また使用量が増大するとＨ
１〜Ｈ２の高液位でのバランス状態となる。When the usage amount decreases in this state, the liquid level in the liquid tank 1 rises to H3, the high liquid level side pilot valve 25 closes, and the pressure chamber 10
Increase the internal pressure and close the main valve body 9. Then, the liquid level opens the low liquid level side pilot valve 24<13
As mentioned above, when the liquid level drops to the position of
A balanced state occurs at a high liquid level of 1 to H2.
また前述のごとく両パイロット弁２４．２５にニードル
弁型のポールタップを用いることにより、上記バランス
状態をより確実に保つことが可能となる。即ち、液位の
変化により上下動する浮子３０の動きを弁体２７の回転
運動に変換し、適当なねじり一ドで進退させて開閉させ
るので、パイロット弁２４．２５から流出する流体の量
を、液槽１内の液位の変化に応じて連続的に確実に制御
することができる。これにより、圧力室１０内の圧力を
連続的に変化させることができるので、液槽１内の液位
に対して最適な主弁体９の開度が得られ、下流側での使
用量に応じた最適な開度でバランスをとることができる
。Further, as described above, by using needle valve type pole taps for both pilot valves 24 and 25, it becomes possible to maintain the above-mentioned balanced state more reliably. That is, the movement of the float 30, which moves up and down due to changes in the liquid level, is converted into the rotational movement of the valve body 27, and the valve body 27 is moved forward and backward with an appropriate twisting motion to open and close, thereby reducing the amount of fluid flowing out from the pilot valves 24 and 25. , can be continuously and reliably controlled according to changes in the liquid level in the liquid tank 1. As a result, the pressure inside the pressure chamber 10 can be continuously changed, so the opening degree of the main valve body 9 can be optimally adjusted for the liquid level in the liquid tank 1, and the amount used on the downstream side can be adjusted. Balance can be achieved with the optimal opening degree.
さらに低液位において、低液位側パイロット弁２４から
の流体の流出量を確実に制御できるので、主弁体９の上
昇による切換弁１３の開弁を必要時に確実に行うことが
でき、ハンチングなどによる誤作動を防止できる。Furthermore, at low liquid levels, the amount of fluid flowing out from the low liquid level side pilot valve 24 can be reliably controlled, so the switching valve 13 can be reliably opened when necessary by raising the main valve body 9, and hunting can be prevented. It is possible to prevent malfunctions caused by such factors.
このように構成された二段切換式液位調整弁を、下流に
水槽を有する上水道設備に用いることにより、余裕のあ
る給水、あるいは水質の悪化や塩素の抜けを防止できる
。By using the two-stage switching type liquid level adjustment valve configured in this manner in water supply equipment having a water tank downstream, it is possible to provide sufficient water supply, or to prevent deterioration of water quality and omission of chlorine.
例えば、昼間等の水の使用量の多い時には、水槽内を高
液位でバランスさせることで、余裕のある給水を行うこ
とができ、また夜間等、水の使用量の少ない場合には、
低液位でバランスさせることにより、水槽内の水の滞留
時間を短縮でき、水質の悪化等を防止できる。また低液
位でバランスした状態で、下流側の消火活動等により水
の使用量が急激に増大した場合には、自動的に高液位に
切換わるので、供給不足となることもない。従って、良
質な水を安定して供給することが可能となる。For example, when water usage is high, such as during the day, by balancing the tank at a high liquid level, you can supply sufficient water, and when water usage is low, such as at night,
By balancing at a low liquid level, the residence time of water in the aquarium can be shortened, and deterioration of water quality can be prevented. Furthermore, if the amount of water used suddenly increases due to fire extinguishing activities on the downstream side while the water level is balanced at a low level, the water level is automatically switched to a high level, so there will be no shortage of supply. Therefore, it becomes possible to stably supply high quality water.
尚、主弁体の開閉は、ダイヤフラムによらずピストン型
式にても行うことができ、各配管等も弁の設置場所等に
より適宜決定されるものである。Note that the main valve body can be opened and closed not by a diaphragm but also by a piston type, and each piping etc. is determined as appropriate depending on the installation location of the valve.
本発明は以上説明したように、弁の下流に設けられた液
槽内の高低それぞれに、液槽内の液位により開閉するパ
イロット弁を設番プて主弁の開度を制御し、液槽内を高
低２段の液位に調整するから、液槽からの導出量に応じ
て液槽内の液位を自動的に調整できる。従って、導出量
の多い時には液位を高くして安定した供給を行うことが
でき、また導出量の少ない時には液位を下げることで、
液槽内での流体の滞留時間を短縮し、流体の変質等を防
止することができる。As explained above, the present invention controls the opening degree of the main valve by installing pilot valves that open and close depending on the liquid level in the liquid tank at each height in the liquid tank provided downstream of the valve. Since the liquid level in the tank is adjusted to two levels, high and low, the liquid level in the tank can be automatically adjusted according to the amount of liquid drawn out from the tank. Therefore, when the amount of extraction is large, the liquid level can be raised to provide a stable supply, and when the amount of extraction is small, the liquid level can be lowered.
It is possible to shorten the residence time of the fluid in the liquid tank and prevent deterioration of the fluid.
第１図は、本発明の一実施例を示す二段切換式液位調整
弁の系統図、第２図はパイロット弁の一実施例を示す断
面平面図である。
１・・・液槽 ２・・・二段切換式液位調整弁３・
・・主弁 ４・・・弁箱 ６・・・−次側弁室
７・・・二次側弁室 ８・・・弁口 ９・・・主弁
体１０・・・圧力室 １１・・・ダイヤフラム １
２・・・ダイヤフラム押え １３・・・切換弁 １
４・・・弁体 １５・・・弁軸 １６・・・弁軸受
け ２４・・・低液位側パイロット弁 ２５・・・
高液位側パイロット弁 ３２・・・バイパス管 ３
３・・・低液位側パイロット配管 ３４・・・高液位
側パイロット配管
つFIG. 1 is a system diagram of a two-stage switching liquid level regulating valve showing one embodiment of the present invention, and FIG. 2 is a sectional plan view showing one embodiment of a pilot valve. 1... Liquid tank 2... Two-stage switching type liquid level adjustment valve 3.
...Main valve 4...Valve box 6...-Outgoing valve chamber 7...Secondary side valve chamber 8...Valve port 9...Main valve body 10...Pressure chamber 11...・Diaphragm 1
2...Diaphragm holder 13...Switching valve 1
4... Valve body 15... Valve stem 16... Valve bearing 24... Low liquid level side pilot valve 25...
High liquid level side pilot valve 32...Bypass pipe 3
3... Pilot piping on the low liquid level side 34... Pilot piping on the high liquid level side
Claims (1)
体が導入される圧力室とを備え、該圧力室の流体をパイ
ロット配管により所定量導出して圧力室の圧力を変化さ
せることにより、前記主弁体の開度を変化させて主弁の
流量を調整し、該主弁の下流に設けられた液槽の液位を
、該液槽からの導出量に応じて高低２段に調整する二段
切換式液位調整弁であって、前記液槽内の低液位と高液
位の所定位置に、液位の変化により開閉する低液位側パ
イロット弁と高液位側パイロット弁をそれぞれ配設し、
前記圧力室と低液位側パイロット弁とを低液位側パイロ
ット配管で接続するとともに、圧力室と高液位側パイロ
ット弁とを、前記主弁体の開度に応じて開弁する切換弁
を設けた高液位側パイロット配管で接続したことを特徴
とする二段切換式液位調整弁。1.Equipped with a main valve body that opens and closes the valve port of the main valve, and a pressure chamber into which fluid on the primary side of the main valve is introduced, and a predetermined amount of fluid in the pressure chamber is drawn out through a pilot pipe to adjust the pressure in the pressure chamber. By changing the opening degree of the main valve body, the flow rate of the main valve is adjusted, and the liquid level of the liquid tank provided downstream of the main valve is adjusted according to the amount drawn out from the liquid tank. This is a two-stage liquid level adjustment valve that adjusts to two high and low levels, and includes a low liquid level side pilot valve that opens and closes according to changes in liquid level at predetermined positions of a low liquid level and a high liquid level in the liquid tank. Each has a pilot valve on the high liquid level side,
A switching valve that connects the pressure chamber and the low liquid level side pilot valve with a low liquid level side pilot pipe, and opens the pressure chamber and the high liquid level side pilot valve according to the opening degree of the main valve body. A two-stage switching liquid level adjustment valve characterized by being connected by a high liquid level side pilot piping provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32017587A JPH063271B2 (en) | 1987-12-18 | 1987-12-18 | Two-stage switching type liquid level adjustment valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32017587A JPH063271B2 (en) | 1987-12-18 | 1987-12-18 | Two-stage switching type liquid level adjustment valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01164879A true JPH01164879A (en) | 1989-06-28 |
| JPH063271B2 JPH063271B2 (en) | 1994-01-12 |
Family
ID=18118530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32017587A Expired - Fee Related JPH063271B2 (en) | 1987-12-18 | 1987-12-18 | Two-stage switching type liquid level adjustment valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH063271B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013545945A (en) * | 2010-11-11 | 2013-12-26 | 李飛宇 | Toilet water supply valve and control method |
-
1987
- 1987-12-18 JP JP32017587A patent/JPH063271B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013545945A (en) * | 2010-11-11 | 2013-12-26 | 李飛宇 | Toilet water supply valve and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH063271B2 (en) | 1994-01-12 |
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