JPH0298712A - Water supply/distribution facility - Google Patents
Water supply/distribution facilityInfo
- Publication number
- JPH0298712A JPH0298712A JP24983188A JP24983188A JPH0298712A JP H0298712 A JPH0298712 A JP H0298712A JP 24983188 A JP24983188 A JP 24983188A JP 24983188 A JP24983188 A JP 24983188A JP H0298712 A JPH0298712 A JP H0298712A
- Authority
- JP
- Japan
- Prior art keywords
- return valve
- water
- distribution
- water transmission
- flow rate
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 230000005540 biological transmission Effects 0.000 claims description 58
- 230000000295 complement effect Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- 238000004886 process control Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は、上水道プラントなどで使用される送配水設備
に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to water transmission and distribution equipment used in water supply plants and the like.
（従来の技術）
上水道プラントにおいては、送配水設備によって上水を
圧送して各ｍ要家に供給するようにしている。(Prior Art) In a waterworks plant, water is pumped through water transmission and distribution equipment to be supplied to each of the m important households.
そしてこの場合、ｈ水の安定供給のために、需要家の需
要変動に対して送配水流量または送配水圧力が設定され
た目標値となるように、送配水ポンプの運転台数制御や
、速度制御、流敬調整弁の開度制御などを行なっている
。In this case, in order to ensure a stable supply of water, the number of water pumps in operation and the speed are controlled so that the flow rate or pressure of water transmission and distribution reaches a set target value in response to fluctuations in customer demand. , and controls the opening of the flow control valve.
したがってこのような送配水ａ（／Ｊにおいては。Therefore, in such water transmission and distribution a(/J).
需要家の需要が減少した場合、送配水ポンプの運転台数
が最終的に１台になることがある。When customer demand decreases, the number of water transmission and distribution pumps in operation may end up being one.
しかしこのような場合にも、上水を安定して供給しなけ
ればならないという目的や、」二本の流れが変わること
に起因する赤水の発生を防ＩＩ―する目的などのために
、最後の１台を停止させることはできない。However, even in such cases, for the purpose of providing a stable supply of clean water and for the purpose of preventing the occurrence of red water caused by the change of the two streams, the final It is not possible to stop one machine.
このため、送配水ポンプを１台だけ運転しているとき、
送配水流量が、送配水ポンプのミニマムフロー特性未満
になってしまうのを防止するために、戻しすｔを開状態
にして、送配水ポンプの流出口側から流入口側に上水を
戻し、送配水ポンプの送配水流量がミニマムフロー特性
未満になるのを防止している。For this reason, when only one water transmission and distribution pump is in operation,
In order to prevent the water transmission and distribution flow rate from becoming less than the minimum flow characteristic of the water transmission and distribution pump, the return port is opened and water is returned from the outflow side to the inlet side of the water transmission and distribution pump. This prevents the water transmission and distribution flow rate of the water transmission and distribution pump from becoming less than the minimum flow characteristic.
（発明が解決しようとする課題）
しかしながらこのような送配水設備では、戻し弁を一旦
開状態にすると、送配水ポンプの流出歌から戻し弁を通
過する上水の流量を引いたイ４（送配水流ＩＡ （ｌα
）が送配水ポンプのミニマムフロー特性以」−にならな
ければ、前記戻し弁を閉状態に戻さないように構成して
いたので、需要家の需要が増加しても、」二本の配送流
量を直ぐに増加させることができないという問題があっ
た。(Problem to be Solved by the Invention) However, in such water transmission and distribution equipment, once the return valve is opened, the flow rate of clean water passing through the return valve is subtracted from the flow rate of the water transmission and distribution pump (i4). Water distribution flow IA (lα
) is below the minimum flow characteristic of the water transmission and distribution pump, the return valve is configured not to return to the closed state. There was a problem that it was not possible to increase the amount immediately.
本発明は上記の事情に鑑み、戻し弁を一旦開状態にした
場合においても、需要家の需要が増加したときにはこれ
を検知して戻し弁を直ちに閉状態にすることができる送
配水設備を提供することを１°１的としている。In view of the above circumstances, the present invention provides water transmission and distribution equipment that can detect an increase in consumer demand and immediately close the return valve even if the return valve is once opened. 1 degree 1 target.
（課題を解決するための手段）
上記の目的を達成するために本５？！明による送配水設
備は、需要家に対する送配水用のポンプ、このポンプの
吐出側流＃Ｃ測定手段およびこのポンプの吐出流量が設
定値以下になると開制御され、ポンプ吐出側流量をポン
プ吸入側に戻す戻し弁を有する第１の送配水系統と、こ
の第１の送配水系統とは別に設けられ、前記需要家に対
し補完的に送配水を行なう流量測定手段を有する第２の
送配水系統と、この第２の送配水系統の送配水流量が設
定イ４以上になると前記戻し弁を閉制御する戻し弁制御
手段とを備えたことを特徴としている。(Means to solve the problem) Book 5 to achieve the above purpose? ! The water transmission and distribution equipment according to Akira consists of a pump for transmitting and distributing water to consumers, a means for measuring the flow #C on the discharge side of this pump, and an open control when the discharge flow rate of this pump becomes less than a set value, and the flow rate on the pump discharge side is controlled to be opened on the pump suction side. a first water transmission and distribution system having a return valve to return the water to the user; and a second water transmission and distribution system that is provided separately from the first water transmission and distribution system and has a flow rate measuring means for complementary water transmission and distribution to the consumers. and a return valve control means for controlling the return valve to close when the water transmission/distribution flow rate of the second water transmission/distribution system reaches setting i4 or higher.
（作用）
上記の構成において、戻し弁が開状態になっていても、
第２の送配水系統から需要家側に供給される上水の流量
が増加しこれが設定値以上になれば、戻し弁制御手段が
これを検知して戻し弁を閉状態に戻す。(Operation) In the above configuration, even if the return valve is in the open state,
When the flow rate of clean water supplied from the second water transmission and distribution system to the consumer side increases and exceeds the set value, the return valve control means detects this and returns the return valve to the closed state.
（実施例）
第１図は本発明による送配水設備の一実施例を用いた送
配水設備プラントの一例を示すブロック図である。(Embodiment) FIG. 1 is a block diagram showing an example of a water transmission and distribution equipment plant using an embodiment of the water transmission and distribution equipment according to the present invention.
この図に示す送配水ａ＆Ｗプラントは、上水の送配水を
行なう送配水部１５と、この送配水部１５を制御するプ
ロセス制御装置１１とを備えており、需要家の需要に応
じて送配水部を制御しながら各需要家に上水を供給する
。The water transmission and distribution A&W plant shown in this figure includes a water transmission and distribution section 15 that transmits and distributes clean water, and a process control device 11 that controls this water transmission and distribution section 15. supply water to each customer while controlling the water supply system.
送配水部１５は、受水管１を介して供給された」二本を
貯留する貯留池２と、この貯留池２に貯留されている上
水を取り込んで圧送動作を行なう複数の送配水ポンプ３
と、これら各送配水ポンプ３の流出口から出る」二本を
前記貯留池２に戻す戻し弁６と、前記各送配水ポンプ３
側から需要家側に圧送される−に水の量を８【す定する
流な計４と、前記各送配水ポンプ３のバックアップ用と
して使用される貯水槽８と、この貯水４ｆｆ８から需要
家側に配送される上水の欲を測定する流量計９とを備え
ている。The water transmission and distribution unit 15 includes a storage pond 2 that stores water supplied through the water receiving pipe 1, and a plurality of water transmission and distribution pumps 3 that take in the clean water stored in the storage pond 2 and perform a pressure-transfer operation.
and a return valve 6 that returns the two water pumps 3 from the outflow ports of each of these water transmission and distribution pumps 3 to the reservoir 2, and
A total of 4 flows to determine the amount of water to be pumped from the side to the consumer side, a water storage tank 8 used as a backup for each of the water transmission and distribution pumps 3, and a water storage tank 8 to be used as a backup for each of the water transmission and distribution pumps 3, and from this water storage 4ff8 to the consumer side. It is equipped with a flow meter 9 that measures the demand for clean water delivered to the side.
そして、この送配水部１５は、＋ＷＩ記プロセスル制御
装置１１の制御の下に、需要家の；ＷＩ要に対応して各
送配水ポンプ３の台数制御などを行ないながら各需要家
に上水を供給する。またこのとき、航記プロセス制御装
置１１から戻し弁開制御指令が供給されれば、この指令
に対応して戻し弁６を開状態にして前記各送配水ポンプ
３の流出口から出る上水の一部を貯留池２に戻す。Under the control of the +WI process control device 11, the water transmission and distribution unit 15 provides water supply to each customer while controlling the number of each water transmission and distribution pump 3 in response to the demand of the customer. supply. At this time, if a return valve opening control command is supplied from the navigation process control device 11, the return valve 6 is opened in response to this command, so that the clean water flowing out from the outlet of each water transmission and distribution pump 3 is A portion is returned to reservoir 2.
また、プロセス制御装置１１は、操作員などによって設
定された設定値（送配水ポンプ３のミニマムフロー特性
値や、戻し弁制御パラメータなど）と、前記戻し弁６の
状態信号と、各送配水ポンプ３の運転状態を示す各状態
信号と、前記各流量計４．９の計測値（送配水流量）と
に基づいて前記戻し弁６の制御などを行なう。Further, the process control device 11 receives set values set by an operator or the like (minimum flow characteristic value of the water transmission and distribution pump 3, return valve control parameters, etc.), a status signal of the return valve 6, and each water transmission and distribution pump. The return valve 6 is controlled based on each state signal indicating the operating state of the flow meter 4.9 and the measured value (water transmission/distribution flow rate) of each flow meter 4.9.
この場合、戻し弁６の開制御条件、閉制御条件としては
１次に述べる条件が用いられる。In this case, the conditions described below are used as the open control conditions and the close control conditions for the return valve 6.
（ａ）戻し弁開制御条件
送配水ポンプ３のＮＧ台数が１台で、かつ戻し弁６が閉
状態であるときにおいて、送配水ポンプ３のミニマムフ
ロー特性より各送配水ポンプ３の流出口側に設けられて
いる流量計４で検出された流ａ （＋６が小さく、かつ
この状態が予め設定されている戻し弁開制御判定時間以
］二継続したとき。(a) Return valve opening control condition When the number of NG water transmission and distribution pumps 3 is one and the return valve 6 is in a closed state, the outlet side of each water transmission and distribution pump 3 is determined from the minimum flow characteristics of the water transmission and distribution pump 3. When the flow a detected by the flow meter 4 provided at
（ｂ）戻し弁閉制御条件
戻し弁６が開状態で、次のいずれかの状態が予め設定さ
れている戻し弁閉制御ＴＩＪ定時間以上継続したとき。(b) Return valve closing control condition When the return valve 6 is in the open state and one of the following conditions continues for a preset return valve closing control TIJ fixed time or more.
（１）送配水ポンプ３が全て停止しているとき。(1) When all the water transmission and distribution pumps 3 are stopped.
（２）送配水ポンプ；３のミニマムフロー特性（＋αと
、不感流量幅設定値とを加算した値より各送配水ポンプ
３の流出口側に設けられている流量計４で検出された流
量値が大きいとき。(2) Water transmission and distribution pump: Flow rate value detected by the flow meter 4 provided at the outlet side of each water transmission and distribution pump 3 from the value obtained by adding the minimum flow characteristic (+α and the dead flow width setting value) of 3. When is large.
（３）流量計９によって得られる流水、１ （貯水槽８
から流れ出る一ヒ水敬）の値が予め設定されている戻し
弁閉流量設定値より大きいとき。(3) Flowing water obtained by flow meter 9, 1 (water tank 8
When the value of water flowing out from the valve is greater than the preset return valve closing flow rate setting value.
そして、戻し弁開＄１１御条件が満たされたとき、プロ
セス制御装置１１は、戻し弁開制御指令を発生して前記
戻し弁６を開状態にする。Then, when the return valve opening $11 control condition is satisfied, the process control device 11 generates a return valve opening control command to open the return valve 6.
また逆に、戻し弁閉制御条件が満たされたとき、プロセ
ス制御装置１１は、戻し弁閉制御指令を発生して前記戻
し弁６を閉状態にする。Conversely, when the return valve closing control condition is satisfied, the process control device 11 generates a return valve closing control command to close the return valve 6.
このようにこの実施例においては、戻し弁（５が開かれ
ている状態で、貯水槽８から流れでる−１−水の量が予
め設定されている戻し弁閉流ａ設定イ」αより大きくな
り、かつこの状態が予め設定されている戻し弁閉制御判
定時間以」−継続したとき、つまり戻し弁６を開状態に
している場合において、需要家の需要が増大したとき、
戻し弁６を早急に閉じるようにしたので、戻し弁６を一
日６開状態にした場合においても、需要家の？ｖ３要が
増加したときにはこれを検知して戻し弁６を直ちに閉状
態にすることができる。Thus, in this embodiment, when the return valve (5) is open, the amount of water flowing out from the water tank 8 is greater than the preset return valve closing flow a setting a. and this state continues beyond the preset return valve closing control determination time, that is, when the return valve 6 is in the open state and the customer's demand increases,
Since the return valve 6 is closed quickly, even if the return valve 6 is left open six times a day, the customer's When the v3 requirement increases, this can be detected and the return valve 6 can be immediately closed.
以上説明したように本発明によれば、戻し弁を一旦開状
態にした場合においても、′ａ要家の需要が増加したと
きにはこれを検知して戻し弁を直ちに閉状態にすること
ができる。As explained above, according to the present invention, even if the return valve is once opened, when the demand for 'a' increases, this can be detected and the return valve can be immediately closed.
第１図は本発明による送配水設備の一実施例を示すブロ
ック図である。
２・・・第１の送配水系統（貯留池）
３・・・送配水用のポンプ（送配水ポンプ）４・・・吐
出側流量測定手段（流量計）６・・・戻し弁
８・・・第２の送配水系統（貯水槽）
９・・・流が測定手段（流量計）FIG. 1 is a block diagram showing an embodiment of water transmission and distribution equipment according to the present invention. 2... First water transmission and distribution system (storage pond) 3... Pump for water transmission and distribution (water transmission and distribution pump) 4... Discharge side flow rate measuring means (flow meter) 6... Return valve 8...・Second water transmission and distribution system (water storage tank) 9...Measurement means for flow (flow meter)
Claims (1)
吐出側流量測定手段およびこのポンプの吐出流量が設定
値以下になると開制御され、ポンプ吐出側流量をポンプ
吸入側に戻す戻し弁を有する第１の送配水系統と、 この第１の送配水系統とは別に設けられ、前記需要家に
対し補完的に送配水を行なう流量測定手段を有する第２
の送配水系統と、 この第２の送配水系統の送配水流量が設定値以上になる
と前記戻し弁を閉制御する戻し弁制御手段と、 を備えたことを特徴とする送配水設備。(1) A pump for transmitting and distributing water to consumers, a means for measuring the flow rate on the discharge side of this pump, and a return valve that is controlled to open when the discharge flow rate of this pump becomes less than a set value and returns the flow rate on the pump discharge side to the pump suction side. a first water transmission and distribution system; and a second water transmission and distribution system, which is provided separately from the first water transmission and distribution system and has flow rate measurement means for complementary water transmission and distribution to the consumers.
A water transmission and distribution system comprising: a water transmission and distribution system; and return valve control means for controlling the return valve to close when the water transmission and distribution flow rate of the second water transmission and distribution system exceeds a set value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24983188A JPH0298712A (en) | 1988-10-05 | 1988-10-05 | Water supply/distribution facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24983188A JPH0298712A (en) | 1988-10-05 | 1988-10-05 | Water supply/distribution facility |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0298712A true JPH0298712A (en) | 1990-04-11 |
Family
ID=17198835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24983188A Pending JPH0298712A (en) | 1988-10-05 | 1988-10-05 | Water supply/distribution facility |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0298712A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010277376A (en) * | 2009-05-29 | 2010-12-09 | Hitachi Ltd | Device and method for controlling pressure in water supply network |
-
1988
- 1988-10-05 JP JP24983188A patent/JPH0298712A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010277376A (en) * | 2009-05-29 | 2010-12-09 | Hitachi Ltd | Device and method for controlling pressure in water supply network |
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