JP3535922B2 - Suction tube tip structure - Google Patents
Suction tube tip structureInfo
- Publication number
- JP3535922B2 JP3535922B2 JP17644695A JP17644695A JP3535922B2 JP 3535922 B2 JP3535922 B2 JP 3535922B2 JP 17644695 A JP17644695 A JP 17644695A JP 17644695 A JP17644695 A JP 17644695A JP 3535922 B2 JP3535922 B2 JP 3535922B2
- Authority
- JP
- Japan
- Prior art keywords
- suction
- water
- suction pipe
- slit
- water level
- 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 - Fee Related
Links
Landscapes
- Sewage (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は、吸込管の先端部構
造に係り、詳しくは真空式下水収集システムの水溜まり
部に没水されて、真空弁の弁開により水溜まり部の水を
吸込み、途中から水と空気との気液混合流体を吸込むよ
うに構成した吸込管の先端部構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tip structure of a suction pipe, and more specifically, it is submerged in a water pool of a vacuum type sewage collection system, and the water in the water pool is sucked by opening a vacuum valve. The present invention relates to the tip structure of a suction pipe configured to suck a gas-liquid mixed fluid of water and air.
【0002】[0002]
【従来の技術】この種の吸込管の先端部構造として、従
来より、実開平4−61186号公報に記載の技術が知
られている。この吸込管の先端部構造は、吸込管の先端
開口が異物で塞がれるのを防止する機能を有している。
しかし、.真空弁の弁開により、まず水溜まり部の水
を吸込み、途中から水と空気との気液混合流体を吸込む
吸込順位保持機能、.水と空気の吸込量の容積比率を
トータル的にほぼ水1:空気3(大気圧換算)に設定す
る吸込気液比保持機能、.気液混合流体の吸込開始時
から吸込終了時にかけて、水の吸込量に対して空気の吸
込量を漸増させる吸込気液比変動機能を有していない。
したがって、水の吸込完了後に大量の空気が吸込まれる
ことになり、真空弁を設置している真空弁マスに接続さ
れた水の流下管(汚水流下管)が負圧化され、この時の
負圧が水の流入管上流のトラップ(たとえばトイレのト
ラップ)に負荷されてトラップを破損したり、真空弁の
弁閉タイミングが少し早くなることにより、水のみを吸
込んでいる状態で真空弁が弁閉された場合、真空弁下流
側の水は慣性によって一旦下流方向に移動したのち、真
空弁側に引き戻されて真空弁に衝撃を与える現象、つま
りウオータハンマーが生じるなどの虞れを有している。2. Description of the Related Art As a tip structure of a suction pipe of this type, a technique described in Japanese Utility Model Laid-Open No. 4-61186 has been conventionally known. This tip structure of the suction pipe has a function of preventing the tip opening of the suction pipe from being blocked by foreign matter.
However,. By opening the vacuum valve, the suction order holding function that first sucks the water in the water pool and then sucks the gas-liquid mixed fluid of water and air halfway ,. Suction gas-liquid ratio holding function that totally sets the volume ratio of the suction amounts of water and air to approximately water 1: air 3 (atmospheric pressure conversion). From the start of suction of the gas-liquid mixed fluid to the end of suction, it does not have a suction gas-liquid ratio variation function of gradually increasing the suction amount of air with respect to the suction amount of water.
Therefore, a large amount of air will be sucked in after the suction of water is completed, and the water downflow pipe (sewage downflow pipe) connected to the vacuum valve mass where the vacuum valve is installed becomes negative pressure. Negative pressure is applied to the trap upstream of the water inflow pipe (for example, a trap in the toilet) to damage the trap, or because the vacuum valve closing timing is a little earlier, the vacuum valve is sucking only water. When the valve is closed, the water on the downstream side of the vacuum valve temporarily moves in the downstream direction due to inertia, and then is pulled back to the vacuum valve side to give an impact to the vacuum valve, that is, a water hammer may occur. ing.
【0003】一方、特開平6−117013号公報に記
載の吸込管の先端部構造がある。しかし、この吸込管の
先端部構造では、前記、およびの機能を有してい
ない上に、吸込管の先端が異物で塞がれるのを防止する
機能もない。しかも、水と空気を同時に吸込ませるため
の吸気管を必要とするため部品点数が多くなるととも
に、吸気管の内外部に異物がからみ易く空気吸込量を低
下させたり、からんだ異物除去の清掃頻度が高くなるな
どの欠点を有する。On the other hand, there is a suction tube tip structure described in JP-A-6-117013. However, this tip structure of the suction pipe does not have the above-mentioned functions and, and also does not have a function of preventing the tip of the suction pipe from being blocked by foreign matter. Moreover, since an intake pipe for simultaneously sucking in water and air is required, the number of parts is increased, and foreign matter is easily entangled inside and outside the intake pipe to reduce the amount of air suctioned and cleaning for removal of entangled foreign matter. It has drawbacks such as high frequency.
【0004】[0004]
【発明が解決しようとする課題】すなわち、従来の吸込
管の先端部構造では、吸込順位保持機能、吸込気液比保
持機能および吸込気液比変動機能を有していない上、吸
込管の先端が異物で塞がれ、吸気管を必要とするため部
品点数が多くなるとともに、吸気管の内外部に異物がか
らみ易く空気吸込量を低下させたり、からみ付いた異物
除去の清掃頻度が高くなるなどの欠点を有している。そ
こで、請求項1記載の発明は、吸込順位保持機能、吸込
気液比保持機能および吸込気液比変動機能をもたせると
ともに、吸込管の先端が万一異物によって閉塞されたと
しても、水と空気の吸込みを継続させ、吸気管の別設を
不要にして部品点数の増加を避け、吸気管の使用により
生じる空気吸込量の低下や異物除去の清掃頻度が高くな
るなどの不都合を回避する吸込管の先端部構造の提供を
目的としたものである。請求項2記載の発明は、気液混
合流体の吸込開始を適正なタイミングで行うことによ
り、水(液体)と空気の吸込量のトータル的な容積比率
を所定の割合に設定できるようにした。That is, the conventional suction pipe tip structure does not have a suction rank holding function, a suction gas-liquid ratio holding function, and a suction gas-liquid ratio changing function, and also has a suction tube tip. Is blocked by foreign matter and requires an intake pipe, which increases the number of parts, and foreign matter is easily entangled inside and outside the intake pipe, reducing the air intake amount and increasing the frequency of cleaning to remove foreign matter that has become entangled. It has drawbacks such as Therefore, the invention according to claim 1 has a suction rank holding function, a suction gas-liquid ratio holding function, and a suction gas-liquid ratio varying function, and even if the tip of the suction pipe is blocked by foreign matter, water and air Suction pipe that avoids the increase in the number of parts by eliminating the need for a separate intake pipe, and avoids the inconveniences such as a decrease in the amount of air suction that occurs due to the use of the intake pipe and frequent cleaning of foreign matter removal. The purpose is to provide the tip structure of the. According to the second aspect of the present invention, the suction of the gas-liquid mixed fluid is started at an appropriate timing so that the total volume ratio of the suction amounts of water (liquid) and air can be set to a predetermined ratio.
【0005】[0005]
【課題を解決するための手段】請求項1記載の発明は、
弁の上流側に接続して水溜まり部に没水され、この水溜
まり部の水位が吸込開始水位まで上昇した時に前記弁を
開弁して、該弁の下流側に接続した吸引手段の吸引力に
より前記水溜まり部の水を吸込み、途中から水と空気と
の気液混合流体を吸込むようにした吸込管の先端部構造
であって、吸込管の周壁を貫通して該吸込管の先端開口
から上方に向けて前記吸込開始水位の途中までのびるス
リットが形成されていることを特徴としたものである。
請求項1記載の発明によれば、水溜まり部の水位が吸込
開始水位からスリットの上端まで低下する間は水溜まり
部の水のみを吸込み、水位がスリットの上端から低下す
るのに伴って気液混合流体を吸込む。気液混合流体吸込
時の吸込気液比は、水位がスリットの上端から吸込管の
先端開口まで低下するのに伴って変動する。つまり、水
位がスリットの上端から吸込管の先端開口まで低下する
のに伴って、スリットの水面上露出面積が大きくなり、
空気の吸込量の割合が漸増する。また、吸込管の先端が
万一異物によって閉塞されたとしても、スリットから水
と空気の吸込みを継続できる。さらに、異物がスリット
にからみ付いたとしても、スリットの下端は開放されて
いるので、水位が吸込管の先端開口まで低下した時点
で、異物が水面に取込まれるから、異物によるスリット
の閉塞を避けることができる。請求項2記載の発明は、
前記スリットの吸込管の先端開口から上端までの切込み
高さが前記先端開口から前記吸込開始水位までの高さの
2/3〜1/4の範囲に設定されているとともに、前記
スリットの幅寸法が吸込管先端部周壁の全周長さの1/
24〜1/12の範囲に設定されていることを特徴とし
たものである。請求項2記載の発明によれば、気液混合
流体の吸込開始を適正なタイミングで行うことにより、
水と空気の吸込量のトータル的な容積比率を所定の割合
に設定することができる。The invention according to claim 1 is
It is connected to the upstream side of the valve and submerged in the water pool, and when the water level in this water pool rises to the suction start water level, the valve is opened and the suction force of the suction means connected to the downstream side of the valve It is a tip structure of a suction pipe that sucks water in the water pool portion and sucks a gas-liquid mixed fluid of water and air from the middle, penetrating a peripheral wall of the suction pipe and upward from a tip opening of the suction pipe. A slit extending toward the middle of the suction start water level is formed.
According to the invention of claim 1, only the water in the water pool is sucked in while the water level in the water pool drops from the suction start water level to the upper end of the slit, and gas-liquid mixing is performed as the water level drops from the upper end of the slit. Inhale fluid. The suction gas-liquid ratio at the time of sucking the gas-liquid mixed fluid changes as the water level decreases from the upper end of the slit to the tip opening of the suction pipe. That is, as the water level decreases from the upper end of the slit to the tip opening of the suction pipe, the exposed area on the water surface of the slit increases,
The ratio of the intake amount of air gradually increases. Further, even if the tip of the suction pipe is blocked by a foreign matter, it is possible to continue sucking water and air through the slit. Furthermore, even if foreign matter is caught in the slit, the lower end of the slit is open, so when the water level drops to the tip opening of the suction pipe, the foreign matter is taken up on the water surface, so the foreign matter will not block the slit. Can be avoided. The invention according to claim 2 is
The slit height of the slit from the tip opening to the upper end of the suction pipe is set to a range of 2/3 to 1/4 of the height from the tip opening to the suction start water level, and the slit width dimension. Is 1 / of the total circumference of the peripheral wall of the suction pipe tip
It is characterized in that it is set in the range of 24 to 1/12. According to the invention of claim 2, by starting the suction of the gas-liquid mixed fluid at an appropriate timing,
The total volume ratio of the suction amounts of water and air can be set to a predetermined ratio.
【0006】[0006]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明する。図1において、真空弁マス1に設
置した真空弁2の上流側の吸込管3を水溜まり部4内に
没水させ、真空弁2の下流側の流出管5の出口を、真空
ポンプ6を備えた下水収集場7に開口している。真空弁
2は、水溜まり部4内の水位が吸込開始水位HWLまで
上昇することによって、水位検知管8内の圧力が上限設
定値に達した時に弁開し、水溜まり部4内の水位が吸込
管3の先端開口3BのレベルLWLまで低下することに
よって、水位検知管8内の圧力が下限設定値まで低下し
た時に弁閉するようになっている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the suction pipe 3 on the upstream side of the vacuum valve 2 installed in the vacuum valve mass 1 is submerged in the water reservoir 4, and the outlet of the outflow pipe 5 on the downstream side of the vacuum valve 2 is equipped with a vacuum pump 6. It opens at the sewage collection site 7. The vacuum valve 2 opens when the water level in the water pool portion 4 rises to the suction start water level HWL and the pressure in the water level detection pipe 8 reaches the upper limit set value, and the water level in the water pool portion 4 rises. By lowering to the level LWL of the tip opening 3B of No. 3, the valve is closed when the pressure in the water level detection pipe 8 drops to the lower limit set value.
【0007】吸込管3には、図2および図3に示すよう
に、周壁3Aを貫通して吸込管3の先端開口3Bから軸
線に沿って上方に向けて途中までのびるスリット9が形
成されている。スリット9の先端開口3Bから上端まで
の切込み高さhおよび幅寸法Wの範囲は、設定真空度、
水溜まり部4の形状による空気吸込量の調整のためのも
ので、切込み高さhが吸込管3の先端開口3Bから吸込
開始水位HWLまでの高さHの2/3〜1/4の範囲
(望ましくは約1/2)に設定されているとともに、ス
リット9の幅寸法Wが吸込管3における先端部周壁3A
の全周長さの1/24(内角15度)〜1/12(内角
30度)の範囲に設定されている。なお、図中10は汚
水流下管を示す。As shown in FIGS. 2 and 3, the suction pipe 3 is formed with a slit 9 penetrating the peripheral wall 3A and extending from the tip end opening 3B of the suction pipe 3 upward along the axial line to the middle. There is. The range of the cut height h and the width dimension W from the tip opening 3B of the slit 9 to the upper end is set vacuum degree,
This is for adjusting the amount of air suction by the shape of the water pool portion 4, and the cutting height h is in the range of 2/3 to 1/4 of the height H from the tip opening 3B of the suction pipe 3 to the suction start water level HWL ( The width dimension W of the slit 9 is preferably set to about 1/2) and the distal end peripheral wall 3A of the suction pipe 3 is
Is set within a range of 1/24 (internal angle of 15 degrees) to 1/12 (internal angle of 30 degrees). In addition, 10 in the figure shows a sewage downflow pipe.
【0008】このような構成であれば、真空弁2の弁開
により、水溜まり部4の水位が吸込開始水位HWLから
スリット9の上端まで低下する間は水溜まり部4の水の
みを吸込み、水位がスリット9の上端から低下するのに
伴って気液混合流体を吸込むことができる。つまり、吸
込順位保持機能を発揮する。また、スリット9の切込み
高さhを吸込管3の先端開口3Bから吸込開始水位HW
Lまでの高さHの約1/2に設定し、スリット9の幅寸
法Wを吸込管3における先端部周壁3Aの全周長さの1
/24〜1/12に設定していることによって、水と空
気の吸込量のトータル的な容積比率を、水1:空気3
(大気圧換算)に設定する吸込気液比保持機能を発揮す
ることができる。しかも、気液混合流体吸込時の吸込気
液比は、水位がスリット9の上端から吸込管3の先端開
口3Bで低下するのに伴って変動する。具体的には、水
位がスリット9の上端から吸込管3の先端開口3Bまで
低下するのに伴って、スリット9の水面上露出面積が大
きくなり、空気の吸込量の割合が漸増する。すなわち、
気液混合流体の吸込時においては、水の吸込量に対して
空気の吸込量を漸増させる吸込気液比変動機能を発揮す
ることになる。With such a construction, while the vacuum valve 2 is opened, only the water in the water pool 4 is sucked in while the water level in the water pool 4 is lowered from the suction start water level HWL to the upper end of the slit 9. The gas-liquid mixed fluid can be sucked as it goes down from the upper end of the slit 9. That is, the suction rank holding function is exerted. Further, the cutting height h of the slit 9 is set to the suction start water level HW from the tip end opening 3B of the suction pipe 3.
The height W up to L is set to about 1/2, and the width dimension W of the slit 9 is set to 1 of the total circumferential length of the tip peripheral wall 3A in the suction pipe 3.
By setting / 24 to 1/12, the total volume ratio of the suction amounts of water and air is set to water 1: air 3
The function of holding the suction gas-liquid ratio set to (atmospheric pressure conversion) can be exhibited. Moreover, the suction gas-liquid ratio at the time of sucking the gas-liquid mixed fluid changes as the water level decreases from the upper end of the slit 9 to the tip opening 3B of the suction pipe 3. Specifically, as the water level decreases from the upper end of the slit 9 to the tip opening 3B of the suction pipe 3, the exposed surface area of the slit 9 on the water surface increases, and the ratio of the air suction amount gradually increases. That is,
At the time of suction of the gas-liquid mixed fluid, the suction gas-liquid ratio varying function of gradually increasing the suction amount of air with respect to the suction amount of water is exhibited.
【0009】その結果、水の吸込完了後に大量の空気を
吸込む状態が生じないので、汚水流下管10が負圧化さ
れて汚水流下管10の上流に設けられているトラップを
破損するようなことは起こらない。また、真空弁2の弁
閉タイミングが少し早くなったとしても、気液混合流体
を吸込んでいる状態で真空弁2が弁閉されることになる
から、真空弁2下流側の流出管5内の気液混合流体が、
弁閉時の慣性によって一旦下流方向に移動したのち真空
弁2側に引き戻されても、空気成分の膨脹によって引き
戻される時間を遅らせるとともに、空気成分の収縮によ
って真空弁2に対する衝撃を緩和するので、ウオータハ
ンマーを防止することができる。As a result, a state in which a large amount of air is sucked in after the suction of water is completed does not occur, so that the sewage downflow pipe 10 is negatively pressured and the trap provided upstream of the sewage downflow pipe 10 is damaged. Does not happen. Further, even if the valve closing timing of the vacuum valve 2 is slightly advanced, the vacuum valve 2 is closed while the gas-liquid mixed fluid is being sucked in, so that the inside of the outflow pipe 5 on the downstream side of the vacuum valve 2 is closed. The gas-liquid mixed fluid of
Even if the vacuum valve 2 is moved back to the vacuum valve 2 side due to inertia when the valve is closed, the expansion time of the air component delays the pullback time, and the contraction of the air component reduces the impact on the vacuum valve 2. Water hammer can be prevented.
【0010】一方、吸込管3の先端開口3Bが万一異物
によって閉塞されたとしても、スリット9から水と空気
の吸込みを継続できる。また、異物がスリット9にから
み付いたとしても、スリット9の下端は開放されている
ので、水位が吸込管3の先端開口3BのレベルLWLま
で低下した時点で、異物が水面に取込まれることになる
ので、異物によるスリット9の閉塞を避けることができ
る。しかも、従来使用されていた吸気管が不要になるの
で、部品点数を低減でき、異物のからみ付きによる空気
吸込量の低下やからみ付いた異物除去の清掃頻度が高く
なるなどの不都合の発生を回避できる。On the other hand, even if the tip opening 3B of the suction pipe 3 is blocked by a foreign matter, the suction of water and air can be continued through the slit 9. Further, even if foreign matter is caught in the slit 9, the lower end of the slit 9 is open, and therefore, when the water level drops to the level LWL of the tip opening 3B of the suction pipe 3, the foreign matter is taken into the water surface. Therefore, the slit 9 can be prevented from being blocked by foreign matter. Moreover, since the conventionally used intake pipe is not required, the number of parts can be reduced, and the occurrence of inconveniences such as a decrease in the amount of air intake due to entanglement of foreign matter and a high frequency of cleaning to remove entangled foreign matter are avoided. it can.
【0011】なお、実験により、スリット9の切込み高
さhが吸込管3の先端開口3Bから吸込開始水位HWL
までの高さHの2/3を超えると、気液混合流体の吸込
開始タイミングが早くなり過ぎて汚水の吸込量を低下さ
せ、水溜まり部4の水位を吸込管3の先端開口3Bのレ
ベルLWLまで低下させる時間が長くなるとともに、ト
ータル的な空気の吸込容積比が大きくなり過ぎることを
確認し、前記hが前記Hの1/4よりも小さくなると、
気液混合流体の吸込開始タイミング遅くなり、空気の吸
込容積比が小さくなり過ぎて、空気の吸込量が不足する
ことを確認しているとともに、スリット9の幅寸法Wが
吸込管3における先端部周壁3Aの全周長さの1/12
を超えると、気液混合流体の吸込時における空気の吸込
量が過剰になって、水溜まり部4の水位低下を妨げるこ
とを確認している。さらに、スリット9の幅寸法Wが前
記1/24よりも比較的小さくなると、気液混合流体の
吸込時における空気の吸込量が不足するとともに、異物
のからみ付き度が大きくなることを確認している。According to an experiment, the cutting height h of the slit 9 is such that the suction start water level HWL from the tip opening 3B of the suction pipe 3.
If it exceeds ⅔ of the height H, the suction start timing of the gas-liquid mixed fluid becomes too early and the suction amount of sewage is reduced, and the water level in the water pool 4 is changed to the level LWL of the tip opening 3B of the suction pipe 3. It has been confirmed that the total suction volume ratio of air becomes too large as the time to decrease to h becomes longer, and if h is smaller than 1/4 of H,
It has been confirmed that the suction start timing of the gas-liquid mixed fluid is delayed, the suction volume ratio of air becomes too small, and the suction amount of air is insufficient, and the width dimension W of the slit 9 is the tip portion of the suction pipe 3. 1/12 of the total circumference of the peripheral wall 3A
It has been confirmed that when it exceeds, the suction amount of air at the time of suction of the gas-liquid mixed fluid becomes excessive and prevents the water level in the water pool portion 4 from being lowered. Furthermore, it was confirmed that if the width dimension W of the slit 9 is relatively smaller than the above-mentioned 1/24, the amount of air sucked in at the time of sucking the gas-liquid mixed fluid becomes insufficient and the degree of entanglement of foreign matters increases. There is.
【0012】[0012]
【発明の効果】以上説明したように、請求項1記載の発
明は、水溜まり部の水位が吸込開始水位からスリットの
上端まで低下する間は水のみを吸込み、水位がスリット
の上端から低下するのに伴って気液混合流体を吸込む吸
込順位保持機能を発揮し、スリットによって、水と空気
の吸込量の容積比率を望ましい値に設定する吸込気液比
保持機能を発揮することができるとともに、水位がスリ
ットの上端から吸込管の先端開口まで低下するのに伴っ
て、水の吸込量に対して空気の吸込量を漸増させる吸込
気液比変動機能を発揮することができるので、水の吸込
完了後に大量の空気を吸込むことによって生じる不都合
の発生を防止し、かつ、真空弁の弁閉タイミングが少し
早くなった場合において生じていたウオータハンマーを
防止することができる。また、吸込管の先端開口が万一
異物によって閉塞されたとしても、スリットから水と空
気の吸込みを継続でき、異物がスリットにからみ付いた
としても、スリットの下端は開放されているので、水位
が吸込管3の先端開口のレベルまで低下した時点で異物
を水面に取込んで、異物によるスリットの閉塞を避ける
ことができる。しかも、従来使用されていた吸気管が不
要になるので、部品点数を低減でき、異物のからみ付き
による空気吸込量の低下やからみ付いた異物除去の清掃
頻度が高くなるなどの不都合の発生を回避することもで
きる。請求項2記載の発明は、気液混合流体の吸込開始
を適正なタイミングで行うことにより、水と空気の吸込
量のトータル的な容積比率を所定の割合に設定すること
ができる。As described above, according to the first aspect of the invention, only the water is sucked in while the water level in the water pool is lowered from the suction start water level to the upper end of the slit, and the water level is lowered from the upper end of the slit. Along with this, the suction rank holding function of sucking the gas-liquid mixed fluid can be exhibited, and the slit can perform the suction gas-liquid ratio holding function of setting the volume ratio of the suction amount of water to the desired value and the water level. As the water drops from the upper end of the slit to the tip opening of the suction pipe, the suction gas-liquid ratio variation function that gradually increases the air suction amount with respect to the water suction amount can be exhibited, so that the water suction is completed. It is possible to prevent the inconvenience caused by sucking a large amount of air later, and to prevent the water hammer that has occurred when the valve closing timing of the vacuum valve is a little earlier. That. In addition, even if the tip opening of the suction pipe is blocked by a foreign substance, the suction of water and air can be continued from the slit, and even if a foreign substance is caught in the slit, the lower end of the slit is open, so the water level The foreign matter can be taken into the water surface at a time point when the pressure has decreased to the level of the tip opening of the suction pipe 3, and the slit can be prevented from being blocked by the foreign matter. Moreover, since the conventionally used intake pipe is not required, the number of parts can be reduced, and the occurrence of inconveniences such as a decrease in the amount of air intake due to entanglement of foreign matter and a high frequency of cleaning to remove entangled foreign matter are avoided. You can also do it. According to the second aspect of the present invention, the total volume ratio of the suction amounts of water and air can be set to a predetermined ratio by starting the suction of the gas-liquid mixed fluid at an appropriate timing.
【図1】本発明の実施の形態を示す構成図である。FIG. 1 is a configuration diagram showing an embodiment of the present invention.
【図2】吸込管の拡大図である。FIG. 2 is an enlarged view of a suction pipe.
【図3】図2におけるA−A矢視図である。FIG. 3 is a view on arrow AA in FIG.
2 真空弁(弁) 3 吸込管 3A 吸込管の周壁 3B 吸込管の先端開口 4 水溜まり部 6 真空ポンプ(吸引手段) 9 スリット H 吸込管の先端開口から吸込開始水位までの高さ h スリットの切込み高さ W スリットの幅寸法 HWL 吸込開始水位 2 Vacuum valve (valve) 3 suction pipe 3A Perimeter wall of suction pipe 3B Suction tube tip opening 4 water pool 6 Vacuum pump (suction means) 9 slits H Height from the tip opening of the suction pipe to the suction start water level h Cut height of slit Width of W slit HWL suction start water level
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) F04D 7/04 E03F 1/00 E03F 3/02 E03F 5/22 E03F 7/00 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) F04D 7/04 E03F 1/00 E03F 3/02 E03F 5/22 E03F 7/00
Claims (2)
され、この水溜まり部の水位が吸込開始水位まで上昇し
た時に前記弁を開弁して、該弁の下流側に接続した吸引
手段の吸引力により前記水溜まり部の水を吸込み、途中
から水と空気との気液混合流体を吸込むようにした吸込
管の先端部構造であって、吸込管の周壁を貫通して該吸
込管の先端開口から上方に向けて前記吸込開始水位の途
中までのびるスリットが形成されていることを特徴とす
る吸込管の先端部構造。1. A suction connected to the upstream side of the valve, which is connected to the upstream side of the valve and submerged in a water pool, and when the water level in the water pool rises to the suction start water level, the valve is opened and the downstream side of the valve is connected. The suction pipe is configured to suck the water in the water pool by the suction force of the means, and to suck the gas-liquid mixed fluid of water and air from the middle of the suction pipe, and the suction pipe penetrating the peripheral wall of the suction pipe. A front end structure of a suction pipe, wherein a slit extending upward from a front end opening to a midpoint of the suction start water level is formed.
までの切込み高さが前記先端開口から前記吸込開始水位
までの高さの2/3〜1/4の範囲に設定されていると
ともに、前記スリットの幅寸法が吸込管先端部周壁の全
周長さの1/24〜1/12の範囲に設定されているこ
とを特徴とする請求項1記載の吸込管の先端部構造。2. The cutting height from the tip opening to the upper end of the suction pipe of the slit is set in the range of 2/3 to 1/4 of the height from the tip opening to the suction start water level, The tip portion structure of the suction pipe according to claim 1, wherein the width dimension of the slit is set in the range of 1/24 to 1/12 of the entire circumferential length of the peripheral wall of the suction pipe tip portion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17644695A JP3535922B2 (en) | 1995-07-12 | 1995-07-12 | Suction tube tip structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17644695A JP3535922B2 (en) | 1995-07-12 | 1995-07-12 | Suction tube tip structure |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0932786A JPH0932786A (en) | 1997-02-04 |
JP3535922B2 true JP3535922B2 (en) | 2004-06-07 |
Family
ID=16013854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17644695A Expired - Fee Related JP3535922B2 (en) | 1995-07-12 | 1995-07-12 | Suction tube tip structure |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3535922B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103643720A (en) * | 2013-12-04 | 2014-03-19 | 苏州凯欧机械科技有限公司 | Foldable high-precision water reservoir |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2427879A (en) * | 2005-07-04 | 2007-01-10 | Rockbourne Environmental Ltd | Vacuum sewage apparatus |
JP7459842B2 (en) * | 2021-06-08 | 2024-04-02 | Jfeスチール株式会社 | Vacuum hose for tower cleaning, and method for cleaning ion exchange resin tower |
-
1995
- 1995-07-12 JP JP17644695A patent/JP3535922B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103643720A (en) * | 2013-12-04 | 2014-03-19 | 苏州凯欧机械科技有限公司 | Foldable high-precision water reservoir |
Also Published As
Publication number | Publication date |
---|---|
JPH0932786A (en) | 1997-02-04 |
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