JPH0634630Y2 - Pump suction water tank - Google Patents
Pump suction water tankInfo
- Publication number
- JPH0634630Y2 JPH0634630Y2 JP1985071553U JP7155385U JPH0634630Y2 JP H0634630 Y2 JPH0634630 Y2 JP H0634630Y2 JP 1985071553 U JP1985071553 U JP 1985071553U JP 7155385 U JP7155385 U JP 7155385U JP H0634630 Y2 JPH0634630 Y2 JP H0634630Y2
- Authority
- JP
- Japan
- Prior art keywords
- flow
- water tank
- pump
- suction water
- pump suction
- 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
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- Structures Of Non-Positive Displacement Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は、仕切壁により複数の流路に分割された沈砂池
の偏流を解消するようにしたポンプ吸込水槽に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a pump suction water tank for eliminating uneven flow in a sand basin divided into a plurality of channels by a partition wall.
（従来の技術） 雨水または汚水排水用等の従来のポンプ吸込水槽の一例
を第５図および第６図に示す。第５図は、二つの方向か
ら流入渠で流体が流入される従来のポンプ吸込水槽の平
面図であり、第６図は、第５図のＸ−Ｘ断面図である。(Prior Art) An example of a conventional pump suction water tank for draining rainwater or sewage is shown in FIGS. 5 and 6. FIG. 5 is a plan view of a conventional pump suction water tank in which a fluid is introduced from an inflow conduit from two directions, and FIG. 6 is a sectional view taken along line XX of FIG.
第５図および第６図において、ポンプ吸込水槽１は、二
つの方向に向けて設けられた流入渠2,2により流体が着
水井３に流入し、この着水井３で合流され、さらに導水
路４で流速が減速されて沈砂池５に流入される。この沈
砂池５は仕切壁6,6…により複数の流路7,7…に分割され
ている。そして、沈砂池５の底面は導水路４より約30cm
以上深く掘られ、その下流側端部に土手状の底面８が設
けられている。さらに、沈砂池５の下流に連ねてマウン
ド形のポンプ井９が設けられ、このポンプ井９に複数の
ポンプの吸込口10,10…が配置されている。なお、仕切
壁6,6…の上流に、流体を流路7,7…に均等に流入させる
べく導流壁11,11…が設けられている。In FIG. 5 and FIG. 6, in the pump suction water tank 1, the fluid flows into the water receiving well 3 by the inflow sluices 2 provided in two directions, joins the water in the water receiving well 3, and further joins the headrace. At 4 the flow velocity is decelerated and the sand flows into the sand basin 5. The sand basin 5 is divided into a plurality of flow paths 7, 7, ... By partition walls 6, 6. And the bottom of the sand basin 5 is about 30 cm from the headrace 4.
It is dug deeply as described above, and a bank-shaped bottom surface 8 is provided at the downstream end thereof. Further, a mound-shaped pump well 9 is provided in series downstream of the sand basin 5, and suction ports 10, 10 ... Of a plurality of pumps are arranged in the pump well 9. .. are provided upstream of the partition walls 6, 6 so as to allow the fluid to flow evenly into the flow paths 7, 7.
従来のポンプ吸込水槽の他の一例を第７図に示す。第７
図は、一つの方向から流入渠で流体が流入されるポンプ
吸込水槽の平面図である。第７図において、第５図およ
び第６図と同一または均等な部材に同一符号を付して重
複する説明を省略する。Another example of the conventional pump suction water tank is shown in FIG. 7th
The figure is a plan view of a pump suction water tank into which fluid is introduced from an inflow conduit from one direction. In FIG. 7, members that are the same as or equivalent to those in FIGS. 5 and 6 are given the same reference numerals, and redundant description is omitted.
第７図に示すものは、一つの流入渠２から着水井３に流
体が流れ込み、この流体を流路7,7…に均等に流入させ
るべく着水井３に導流壁11,11…が設けられ、流体の流
れる方向と流量を適宜に調整するように構成されてい
る。As shown in FIG. 7, the fluid flows from one inflow culvert 2 into the landing well 3 and the landing well 3 is provided with diversion walls 11, 11 ... In order to allow the fluid to flow evenly into the channels 7, 7. The flow direction and the flow rate of the fluid are appropriately adjusted.
（考案が解決しようとする課題） ところで、沈砂池５は流体に含まれる砂等を沈降させ
て、ポンプに砂等が吸込まれないようにするものであ
り、沈砂池５を流れる流体の流速は幅方向に均等ででき
るだけ穏やかであることが望ましい。そこで、導水路４
を充分な幅と長さに設けられれば良いが、近年では用地
難等により立地条件が悪く、導水路４を十分な大きさで
設けるだけのスペースが得られないことが多い。そこ
で、着水井３から導水路４に流れ込む流体は、流路断面
積の急激な増大により流速は急激に減速されるものの、
流れの慣性により導水路４の中央部が両側部に比較して
流速が速くなってしまう。そして、この導水路４の幅と
長さが十分でない第５図に示すポンプ吸込水槽１では、
流入渠2,2から着水井３に流れ込む流体の流速を十分に
減速することができない。そして、沈砂池５の中央部の
流路7,7の流速が速く、沈砂池５の幅方向で均等な流速
が得られにくく、集中流等の偏流を生じさせる。このた
めに、第５図に示すごとく導水路４に導流壁11,11…を
設けて両側部に流れる流量を増加させ、沈砂池５のそれ
ぞれの流路7,7…に流れる流体の流量を均等なものとし
て偏流を解消しようとしている。しかしながら、第５図
に示すごとき導流壁11,11…では、それぞれの流路7,7…
に流れる流体の流量を均等にすることはできるが、それ
ぞれの流路7,7…を流れる流体の流速を均等にすること
は難しい。(Problems to be solved by the invention) By the way, the sand basin 5 is intended to settle sand or the like contained in the fluid so that the sand or the like is not sucked into the pump. It is desirable to be even in the width direction and be as gentle as possible. Therefore, headrace 4
However, in recent years the location conditions are poor due to site difficulties, etc., and in many cases there is not enough space to provide the water conduit 4 in a sufficient size. Therefore, although the flow velocity of the fluid flowing from the landing well 3 into the headrace 4 is rapidly reduced due to the rapid increase in the flow passage cross-sectional area,
Due to the inertia of the flow, the flow velocity in the central portion of the water conduit 4 becomes higher than that in the both side portions. And, in the pump suction water tank 1 shown in FIG. 5 in which the width and length of the water conduit 4 are not sufficient,
The flow velocity of the fluid flowing from the inflow culverts 2, 2 into the landing well 3 cannot be sufficiently reduced. Then, the flow velocity of the flow paths 7, 7 in the central portion of the sand basin 5 is high, it is difficult to obtain a uniform flow velocity in the width direction of the sand basin 5, and a drift such as a concentrated flow occurs. For this purpose, as shown in FIG. 5, the flow passage 4 is provided with flow guide walls 11, 11 ... to increase the flow rate on both sides, and the flow rate of the fluid flowing to the respective flow channels 7, 7 ... Is trying to eliminate the drift as equal. However, in the flow guide walls 11, 11, ... As shown in FIG.
It is possible to make the flow rate of the fluid flowing through the channels even, but it is difficult to make the flow velocities of the fluid flowing through the respective channels 7, 7 ...
そこで、沈砂池５のそれぞれの流路7,7…に流れる流体
の流量および流速を均等にするためには、多数の導流壁
11,11…を複雑に配置しなければならない。さらに、こ
の導流壁11,11…はポンプ吸込水槽１毎に流入渠2,2から
流入する流体の流量および流速等が異なるため、個々に
その最適な構造が異なる。したがって、導流壁11、11…
の設計が複雑であるとともに、その土木施工が容易でな
いという不具合がある。Therefore, in order to equalize the flow rate and the flow velocity of the fluid flowing through the respective flow paths 7, 7 ...
11,11 ... must be arranged in a complicated manner. Further, since the flow guide walls 11, 11, ... Have different flow rates and flow velocities of the fluid flowing from the inflow conduits 2, 2 for each pump suction water tank 1, the optimum structures thereof are different. Therefore, the diversion walls 11, 11 ...
There is a problem that the design is complicated and the civil engineering work is not easy.
本考案の目的は、上記の従来のポンプ吸込水槽の不具合
を解消すべくなされたもので、沈砂池を複数の流路に分
割し、これらの複数の流路に均等な流速で流体を流入さ
せるようにして、簡単な構造で沈砂池の偏流を解消する
ようにしたポンプ吸込水槽を提供することにある。The object of the present invention is to eliminate the above-mentioned problems of the conventional pump suction water tank, and divides the sand basin into a plurality of flow passages, and allows the fluid to flow into these plurality of flow passages at a uniform flow velocity. Thus, it is an object of the present invention to provide a pump suction water tank which has a simple structure and eliminates uneven flow in a sand basin.
（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、本考案のポンプ吸込水槽
は、仕切壁により複数の流路に分割された沈砂池と、こ
の沈砂池の下流に連接して設けられたポンプ井とを備え
たポンプ吸込水槽において、前記複数の流路のすくなく
とも一つ以上の流路で前記沈砂池とポンプ井の間に、流
路幅方向に一定で流路毎に設定された所定の幅を有する
抵抗物体を流れに直交させて配設し、前記複数の流路に
等しい流速で流体が流入するように構成されている。(Means for Solving the Problem) In order to achieve such an object, a pump suction water tank of the present invention is provided with a sand basin divided into a plurality of flow passages by a partition wall, and connected downstream of the sand basin. In a pump suction water tank with a pump well provided, between the sand basin and the pump well in at least one or more channels of the plurality of channels, it is set for each channel constant in the channel width direction. A resistance body having a predetermined width is arranged orthogonal to the flow so that the fluid flows into the plurality of flow paths at the same flow velocity.
（作用） 沈砂池の複数の流路のすくなくとも一つ以上の流路の下
流側端部に、流路幅方向に一定で流路毎に設定された所
定の幅を有する抵抗物体を流れに直交させて配設したの
で、それぞれの流路に流体が均等な流速で流れ込むとと
もに、流路内でも流路幅方向で流速が均等となる。そし
て、ポンプ井にも幅方向で均等な流速で流体が流れ込
む。(Operation) A resistive object having a predetermined width set in each channel width direction at a downstream end of at least one channel of the plurality of channels of the sand basin is orthogonal to the flow. Since they are arranged so that the fluid flows into each of the flow paths at a uniform flow velocity, the flow velocity becomes uniform in the flow channel width direction even within the flow channels. Then, the fluid also flows into the pump well at a uniform flow velocity in the width direction.
（実施例） 以下、本考案の実施例を第１図ないし第３図を参照して
説明する。第１図は、本考案のポンプ吸込水槽の一実施
例の平面図であり、第２図は、第１図のＹ−Ｙ断面図で
あり、第３図は、第１図のＺ−Ｚ要部断面拡大図であ
る。第１図ないし第３図において、第５図ないし第７図
と同一または均等な部材に同一符号を付して重複する説
明を省略する。(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. 1 is a plan view of an embodiment of the pump suction water tank of the present invention, FIG. 2 is a sectional view taken along line YY of FIG. 1, and FIG. 3 is taken along line ZZ of FIG. FIG. In FIGS. 1 to 3, the same or equivalent members as those in FIGS. 5 to 7 are designated by the same reference numerals, and duplicate description will be omitted.
第１図ないし第３図において、ポンプ吸込水槽20は、沈
砂池５の中央部の流路7,7の下流側端部の沈砂池５とポ
ンプ井９の間で、土手状の底面８に当接するように、没
水させるとともに流れに直交させて板状の抵抗物体21,2
1が配置されている。この抵抗物体21,21は、両端部が仕
切壁6,6…に設けられた縦溝22,22…に挿入嵌合されて固
定されている。そして、抵抗物体21,21…の高さ方向の
幅ｈは、流路幅方向に一定であるとともに、抵抗物体2
1,21…が設けられていない状態の流路7,7に流れ込む流
体の流速の違いに応じて、流路毎に適宜に所定の幅に設
定される。なお、抵抗物体21,21…の幅ｈが高いほど流
体の流れが妨げられ、その抵抗物体21,21…が配置され
た流路7,7に流入する流量が減少される。In FIG. 1 to FIG. 3, the pump suction water tank 20 is provided on the bank-like bottom surface 8 between the sand basin 5 and the pump well 9 at the downstream end of the flow paths 7, 7 in the central portion of the sand basin 5. The plate-like resistance bodies 21, 2
1 is placed. Both ends of the resistive objects 21, 21 are fixed by being inserted and fitted into the vertical grooves 22, 22 provided in the partition walls 6, 6. The width h in the height direction of the resistance bodies 21, 21, ... Is constant in the flow channel width direction, and
Depending on the difference in the flow velocity of the fluid flowing into the flow paths 7,7 in the state where 1,21 ... Are not provided, a predetermined width is appropriately set for each flow path. It should be noted that as the width h of the resistance bodies 21, 21 ... Is increased, the flow of the fluid is hindered, and the flow rate flowing into the flow paths 7, 7 in which the resistance bodies 21, 21, ... Are arranged is reduced.
かかる構成において、中央部の流路7,7の下流側端部に
抵抗物体21,21が設けられているので、中央部の流路7,7
への流体の流入が妨げられ、両側部の流路7,7により多
くの流量が流れ込み、全ての流路7,7…に均等な流速で
流体が流れ込むように調整することができる。しかも、
抵抗物体21,21の高さ方向の幅ｈは、流路毎に流路幅方
向に一定であり、流路7,7内の流路幅方向で流速が均等
となる。そして、抵抗物体21,21が沈砂池５の下流側端
部に配置されているので、流体の流速は着水井３と導水
路４および沈砂池５の長い距離で徐々に減速され、沈砂
池５における流体の減速率が小さくて沈砂池５で安定し
た流れとなる。したがって、沈砂池５で均等で穏やかな
流速が得られ、効率良く砂等を沈降させることができ
る。また、抵抗物体21,21が土手状の底面８に当接して
没水させて配置されているので、沈降した砂等を抵抗物
体21,21の上流側に堆積させることができ、砂等がポン
プ井９に流入するのをより一層少なくすることができ
る。さらに、沈砂池５で集中流等の偏流を生ずることが
ないので、ポンプ井９にも幅方向で均等な流速で流体が
流れ込み、ポンプ井９の水位がそれぞれのポンプの吸込
口10,10…で均等となる。このために、ポンプ井９に配
設された複数のポンプを同一条件で運転させることがで
き、運転管理が容易なものとなる。なお、本考案出願人
の実験によれば、流量550m3/min、揚程16m、吸込口の口
径2mのポンプを４台設置したポンプ吸込水槽において、
従来の第５図の導流壁11、11…を利用したものがポンプ
吸込口10の限界没水高さSc（空気吸込渦が発生し初める
時の水の自由表面からポンプ吸込口10の下端までの深
さ）が3.2mであるのに対して、本考案のものは限界没水
深さScが2.6mとなり、自由表面がより低い水位となるま
でポンプを安定に運転することができ、それだけポンプ
井９の深さを浅くすることができた。そしてさらに、抵
抗物体21,21の幅ｈを調整することで、個々の流路7,7…
毎に流入する流速を容易に調整することができ、しかも
抵抗物体21,21…の施工は従来の導流壁11,11…に比較し
て簡単なものである。In such a configuration, since the resistance objects 21, 21 are provided at the downstream end portions of the flow passages 7, 7 in the central portion, the flow passages 7, 7 in the central portion are provided.
It is possible to adjust so that the flow of the fluid into the flow paths is blocked, a larger flow rate flows into the flow paths 7, 7 on both sides, and the fluid flows into all the flow paths 7, 7 ... At a uniform flow rate. Moreover,
The width h in the height direction of the resistance bodies 21, 21 is constant in the flow channel width direction for each flow channel, and the flow velocity becomes uniform in the flow channel width direction in the flow channels 7, 7. Since the resistance bodies 21, 21 are arranged at the downstream end of the sand basin 5, the flow velocity of the fluid is gradually reduced by a long distance between the landing well 3, the headrace 4, and the sand basin 5, and the sand basin 5 The deceleration rate of the fluid in is small and a stable flow is achieved in the sand basin 5. Therefore, a uniform and gentle flow velocity can be obtained in the sand basin 5, and sand or the like can be efficiently settled. Further, since the resistance bodies 21, 21 are arranged in contact with the bank-shaped bottom surface 8 so as to be submerged, sedimented sand or the like can be deposited on the upstream side of the resistance bodies 21, 21 to prevent the sand, etc. It is possible to further reduce the flow into the pump well 9. Further, since no uneven flow such as a concentrated flow is generated in the sand basin 5, the fluid flows into the pump well 9 at a uniform flow velocity in the width direction, and the water level of the pump well 9 causes the suction ports 10, 10 ... Is even. For this reason, a plurality of pumps arranged in the pump well 9 can be operated under the same conditions, and operation management becomes easy. According to an experiment by the applicant of the present invention, in a pump suction water tank in which four pumps having a flow rate of 550 m 3 / min, a head of 16 m and a suction port diameter of 2 m are installed,
The one using the conventional flow guide walls 11, 11 ... in Fig. 5 is the limit submersible height Sc of the pump suction port 10 (from the free surface of the water when the air suction vortex begins to occur to the lower end of the pump suction port 10). The maximum submersion depth Sc is 3.2 m, while the present invention has a limit submersion depth Sc of 2.6 m, which enables stable operation of the pump until the free surface reaches a lower water level. The depth of the pump well 9 could be made shallow. Further, by adjusting the width h of the resistive objects 21,21, the individual flow paths 7,7 ...
It is possible to easily adjust the flow velocity flowing in each time, and the construction of the resistance bodies 21, 21, ... Is simpler than that of the conventional diversion walls 11, 11 ,.
第４図は、本考案のポンプ吸込水槽の他の実施例の要部
拡大図である。第４図に示すものは、沈砂池５の土手状
の底面８に支持部材23,23…を配置し、この支持部材23,
23…により抵抗物体21,21を土手状の底面８から適宜な
高さだけ持ち上げて配置するようにしたものである。こ
のように、抵抗物体21,21を土手状の底面８から適宜な
高さだけ持ち上げて配置することで、ポンプ井９の底付
近の流速を早くするようにして、ポンプによる吸込を安
定にすることができる。さらに、図示しないが、水面上
に抵抗物体21,21の一部が突出するように配置させても
良い。また、上記実施例における抵抗物体21,21…は仕
切壁6,6…に設けられた縦溝22,22…に両端部が挿入嵌合
されたいわゆる「角落し」の構造であり、抵抗物体21、
21…をワイヤーロープ等を介してウインチで上げ下げで
きるように構成することができる。そこで、それぞれの
流路7,7…の沈砂池５とポンプ井９との間に、複数個の
抵抗物体21,21…を積み重ねて配置できるようにすれ
ば、この抵抗物体21,21…で流路7,7…を全閉させるシャ
ッターとして機能させることができる。かかる機能によ
り雨水排水機場等のごとく、処理すべき水量に応じて稼
動させるポンプの台数を選択するような場合に、従来は
流路の上流側に設けられていたゲートを不要とすること
ができる。FIG. 4 is an enlarged view of the essential parts of another embodiment of the pump suction water tank of the present invention. As shown in FIG. 4, the support members 23, 23 ... Are arranged on the bottom surface 8 of the bank of the sand basin 5, and the support members 23,
The resistance objects 21, 21 are lifted from the bank-shaped bottom surface 8 by an appropriate height by means of 23. In this way, the resistance bodies 21, 21 are arranged so as to be lifted from the bank-shaped bottom surface 8 by an appropriate height to increase the flow velocity near the bottom of the pump well 9 and stabilize the suction by the pump. be able to. Further, although not shown, the resistance objects 21, 21 may be arranged so as to partially project above the water surface. Further, the resistance bodies 21, 21 ... In the above-mentioned embodiment have a so-called “corner drop” structure in which both ends are inserted and fitted into the vertical grooves 22, 22 provided in the partition walls 6, 6. twenty one,
21 ... can be configured to be lifted and lowered by a winch via a wire rope or the like. Therefore, if a plurality of resistance objects 21, 21 ... Can be stacked and arranged between the sand basin 5 and the pump well 9 of each flow path 7, 7 ,. It is possible to function as a shutter that completely closes the flow paths 7, 7. With such a function, when selecting the number of pumps to be operated according to the amount of water to be treated, such as in a rainwater drainage station, the gate conventionally provided on the upstream side of the flow path can be eliminated. .
なお、抵抗物体21,21は上記実施例のごとく板状のもの
に限られず、幅ｈが流路幅方向に一定であれば丸棒状等
のいかなる断面形状であっても良い。また、上記実施例
では、抵抗物体21,21を仕切壁6,6および沈砂池５の土手
状の底面８と別体で構成したが、一体的にコンクリート
等で施工されたものであっても良い。さらに、抵抗物体
21,21は沈砂池５とポンプ井９の間の流路7,7の下流側端
部に配置されていれば良い。そしてさらに、抵抗物体2
1,21は、複数の流路のすくなくとも一つ以上に配設され
てそれぞれの流路の流速が均等になれば良く、抵抗物体
21,21が配設されない流路があっても良い。そして、抵
抗物体21,21の幅ｈは、流路毎に異なって設定されても
良いことは勿論である。The resistance bodies 21, 21 are not limited to the plate-like ones as in the above embodiment, and may have any cross-sectional shape such as a round bar shape as long as the width h is constant in the flow channel width direction. Further, in the above embodiment, the resistance bodies 21, 21 are formed separately from the partition walls 6, 6 and the bank-like bottom surface 8 of the sand basin 5, but they may be integrally constructed of concrete or the like. good. In addition, resistance objects
21, 21 should just be arrange | positioned at the downstream end part of the flow paths 7, 7 between the sand basin 5 and the pump well 9. And further, the resistance object 2
1,21 should be arranged in at least one of the plurality of flow paths so that the flow velocities of the respective flow paths are equal,
There may be a flow path in which 21, 21 are not provided. Of course, the width h of the resistive objects 21, 21 may be set differently for each flow path.
（考案の効果） 以上説明したように、本考案に係わるポンプ吸込水槽に
よれば、沈砂池の複数の流路に流体が均等な流速で流れ
込むとともに、流路内でも流路幅方向で流速が均等とな
る。この結果、沈砂池の幅方向で流体の流速が均等でし
かも穏やかなものとなり、効率良く砂等を沈降させるこ
とができる。また、沈砂池からポンプ井に流体が幅方向
で均等な流速で流れ込み、ポンプ井に偏流を生じさせな
いので、ポンプ井に設けられた複数のポンプを同一条件
で運転することができ、ポンプの運転管理が容易であ
る。さらに、流路の流速を調整するための抵抗物体の施
工は、従来の導流壁に比較して簡単なものであり、その
調整も容易である。(Effect of the Invention) As described above, according to the pump suction water tank of the present invention, the fluid flows into the plurality of channels of the sand basin at a uniform flow rate, and the flow rate in the channel width direction is also increased in the channel. It will be even. As a result, the flow velocity of the fluid is uniform and gentle in the width direction of the sand basin, and the sand or the like can be efficiently settled. Also, since the fluid flows from the sand basin to the pump well at a uniform flow velocity in the width direction and does not cause uneven flow in the pump well, it is possible to operate multiple pumps installed in the pump well under the same conditions. Easy to manage. Further, the construction of the resistance body for adjusting the flow velocity of the flow path is simpler than that of the conventional guide wall, and the adjustment thereof is easy.
第１図は、本考案のポンプ吸込水槽の一実施例の平面図
であり、第２図は、第１図のＹ−Ｙ断面図であり、第３
図は、第１図のＺ−Ｚ要部断面拡大図であり、第４図
は、本考案のポンプ吸込水槽の他の実施例の要部拡大図
であり、第５図は、二つの方向に向けて流入渠が設けら
れた従来のポンプ吸込水槽の平面図であり、第６図は、
第５図のＸ−Ｘ断面図であり、第７図は、一つの方向に
向けて流入渠が設けられた従来のポンプ吸込水槽の平面
図である。 1,20:ポンプ吸込水槽、5:沈砂池、6:仕切壁、7:流路、
8:土手状の底面、9:ポンプ井、21:抵抗物体。1 is a plan view of an embodiment of the pump suction water tank of the present invention, FIG. 2 is a sectional view taken along line YY of FIG. 1, and FIG.
1 is an enlarged cross-sectional view of the ZZ main part of FIG. 1, FIG. 4 is an enlarged main part of another embodiment of the pump suction water tank of the present invention, and FIG. FIG. 6 is a plan view of a conventional pump suction water tank in which an inflow conduit is provided toward
5 is a sectional view taken along line XX of FIG. 5, and FIG. 7 is a plan view of a conventional pump suction water tank provided with an inflow conduit in one direction. 1,20: Pump suction water tank, 5: Sand basin, 6: Partition wall, 7: Flow path,
8: Bank-like bottom, 9: Pump well, 21: Resistance object.
Claims (2)
池と、この沈砂池の下流に連接して設けられたポンプ井
とを備えたポンプ吸込水槽において、前記複数の流路の
すくなくとも一つ以上の流路で前記沈砂池とポンプ井の
間に、流路幅方向に一定で流路毎に設定された所定の幅
を有する抵抗物体を流れに直交させて配設し、前記複数
の流路に等しい流速で流体が流入するように構成したこ
とを特徴とするポンプ吸込水槽。1. A pump suction water tank comprising a settling basin divided into a plurality of flow paths by a partition wall and a pump well connected downstream of the settling basin. Between the sand basin and the pump well in one or more flow passages, a resistance object having a predetermined width set in each flow passage width direction and being constant is arranged orthogonal to the flow, The pump suction water tank is configured so that the fluid flows in at the same flow velocity into the channel.
間の土手状の底面に当接するように没水されて配置され
ていることを特徴とする実用新案登録請求の範囲第１項
記載のポンプ吸込水槽。2. The utility model registration claim 1, wherein the resistance object is arranged so as to be submerged so as to come into contact with the bottom surface of the bank between the sand basin and the pump well. Pump suction water tank as described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985071553U JPH0634630Y2 (en) | 1985-05-16 | 1985-05-16 | Pump suction water tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985071553U JPH0634630Y2 (en) | 1985-05-16 | 1985-05-16 | Pump suction water tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61187998U JPS61187998U (en) | 1986-11-22 |
| JPH0634630Y2 true JPH0634630Y2 (en) | 1994-09-07 |
Family
ID=30609159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985071553U Expired - Lifetime JPH0634630Y2 (en) | 1985-05-16 | 1985-05-16 | Pump suction water tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0634630Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5540230B2 (en) * | 2007-06-06 | 2014-07-02 | アクアインテック株式会社 | Sand collecting device and sand collecting method |
| JP6620047B2 (en) * | 2016-03-16 | 2019-12-11 | 株式会社荏原製作所 | Drainage station and drainage method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57121781U (en) * | 1981-01-22 | 1982-07-29 |
-
1985
- 1985-05-16 JP JP1985071553U patent/JPH0634630Y2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| 荏原製作所風水力機械事業部ポンプ設備便覧編集委員会編「ポンプ設備便覧（本編）」Ｐ．１００〜１０２ |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61187998U (en) | 1986-11-22 |
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