JPH08302758A - Water supply system - Google Patents
Water supply systemInfo
- Publication number
- JPH08302758A JPH08302758A JP13114695A JP13114695A JPH08302758A JP H08302758 A JPH08302758 A JP H08302758A JP 13114695 A JP13114695 A JP 13114695A JP 13114695 A JP13114695 A JP 13114695A JP H08302758 A JPH08302758 A JP H08302758A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- water
- water supply
- pump
- controller
- 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
Landscapes
- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は上水道の給水システム
に関するものであり、所定の給水圧力を確保するための
装置の建設費、その運転コストを低減することができる
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply system for waterworks, which can reduce the construction cost and operation cost of a device for ensuring a predetermined water supply pressure.
【０００２】[0002]
【従来の技術】上水道の所定の水圧を確保する方法とし
ては、配水池を所定の高さの所に設置して、その水頭圧
（落差による圧力）によって必要な給水圧力を確保する
方法、水道本管の所々に加圧ポンプを設置する方法等が
採用されている。このようにして上水道の給水圧力を確
保した上で、本管の所々に開閉弁を配置してその開度を
加減することによって各端末管からの給水圧力を調節し
ている。前者、すなわち、配水池の水頭圧によって給水
圧を確保する給水システムにおいては、給水地域の拡
大、水の消費量の一時的増大に伴って末端圧力が不足
し、十分な給水を行うことができない事態になる場合が
少なくない。また、後者においては、所々に加圧ポンプ
を設置するものであるからその建設費、その保守のため
のコスト、運転コストが高いので、これらの費用の低減
が求められ、さらに、加圧ポンプは遠心ポンプである
が、水の消費量の大小に関わらずそのポンプ能力は一定
であるから、水の消費量が最大の時間帯に合わせてその
ポンプ能力を設定する関係上、水の消費量が少ない時間
帯での本管圧力は必要以上に高くなる。そして、既設の
上水道システムについて、需要の増大に対応するには特
に水道圧力が低くなる端末管に加圧ポンプを付加すると
いう対策を講じている。2. Description of the Related Art As a method for ensuring a predetermined water pressure for water supply, a method of installing a distribution reservoir at a predetermined height and ensuring a necessary water supply pressure by the head pressure (pressure due to a head), A method of installing a pressure pump in various places of the main pipe is adopted. In this way, after securing the water supply pressure of the water supply, the on-off valves are arranged in various places of the main pipe to adjust the opening degree thereof to adjust the water supply pressure from each terminal pipe. In the former case, that is, in the water supply system that secures the water supply pressure by the head pressure of the distribution reservoir, the terminal pressure is insufficient due to the expansion of the water supply area and the temporary increase in water consumption, and sufficient water supply cannot be performed. There are quite a few situations. Further, in the latter, since the pressure pumps are installed in places, the construction cost, maintenance cost, and operation cost are high, so reduction of these costs is required. Although it is a centrifugal pump, its pump capacity is constant regardless of the amount of water consumed, so the amount of water consumed is set because the pump capacity is set according to the time zone when the water is consumed maximum. The main pressure in a small time zone becomes higher than necessary. Then, in order to cope with the increase in demand for the existing water supply system, measures are taken to add a pressure pump to the terminal pipe where the water pressure becomes particularly low.
【０００３】[0003]
【発明が解決しようとする課題】上水道の給水圧力を積
極的に確保するシステムについて、その建設費用、保守
費用、その運転費用を可及的に低減し、加圧圧力を上水
の消費量の増減に関わらず、必要、かつ十分な限度に適
正に制御できるようにすることをその課題とするもので
ある。[Problems to be Solved by the Invention] Concerning a system that positively secures the water supply pressure of water supply, its construction cost, maintenance cost, and its operating cost are reduced as much as possible, and the pressurization pressure is adjusted to the consumption of water. The problem is to be able to properly control to a necessary and sufficient limit regardless of the increase or decrease.
【０００４】[0004]
【課題を解決するための手段】上記課題解決のために講
じた手段は次ぎの要素（イ）〜（ハ）によって構成され
るものである。 （イ）配水池に加圧ポンプを付設し、その回転速度を制
御装置によって無段階に制御すること、（ロ）水道本管
の主要端末管に圧力検出装置を設け、当該圧力検出装置
によって計測した圧力情報を上記制御装置に無線送信す
るようにしたこと、（ハ）上記制御装置はインバーター
を有し、この制御装置によって、上記圧力情報に基づい
て主要端末管の水圧が所定の圧力に回復するように加圧
ポンプの回転速度を制御するようにしたこと。[Means for Solving the Problems] The measures taken for solving the above problems are constituted by the following elements (a) to (c). (A) A pressure pump is attached to the reservoir, and its rotation speed is controlled steplessly by a control device. (B) A pressure detection device is installed in the main terminal pipe of the water main, and the pressure is measured by the pressure detection device. Wirelessly transmitting the pressure information to the control device, (c) the control device has an inverter, and the control device restores the water pressure of the main terminal pipe to a predetermined pressure based on the pressure information. The rotation speed of the pressure pump is controlled so that
【０００５】[0005]
【作 用】水道本管の主要端末管に設けた圧力検出装置
によって、各主要端末管における水道圧を検出し、その
いずれかの端末管の検出圧が所定の圧力よりも低いとき
は、加圧ポンプの回転速度を制御して加圧圧力を上げ、
これによって当該端末管における水道圧を回復させる。
全ての端末管の検出圧力が所定以上であるときは、加圧
ポンプの回転速度を下げて、最も水道圧が低い端末管に
おける水道圧が所定の圧力に維持されるようにする。水
の消費が少ない時間帯においては各端末の水道圧力は高
く、消費量が多い時間帯においては大方の端末の水道圧
力は低くなるので、水の消費が少ない時間帯においては
加圧ポンプは低い回転速度で制御され、水の消費が多い
時間帯においては加圧ポンプは高い回転速度で制御され
る。したがって、最も効率的な水道圧力の制御がなされ
る。各端末に圧力検出装置を付設する費用は、各端末管
に加圧ポンプを付設する場合のそれに比して、著しく廉
価であり、また、各端末管における圧力の計測情報は無
線で制御装置に送信され、全ての端末管の送信機からの
信号のうち、最も低圧のものを基準にして、これが所定
の圧力に回復するように加圧ポンプを制御するので、そ
の運転、メンテナンス費用は各端末管に加圧ポンプを付
設する場合のそれに比して著しく廉価である。例えば、
消費量が比較的少ない時間帯には配水池の水頭圧によっ
て十分対応できる上水道システムにおいては、当該時間
帯では加圧ポンプによる加圧は行われないことになり、
消費量が比較的多い時間帯でのみ加圧ポンプによる加圧
は行われることになる。インバーターによって加圧ポン
プの回転速度を無段階に制御するものであるから、その
吐出圧の制御は容易、かつ精緻に行われ、必要以上の高
圧に加圧することは回避される。水道本管の特定の端末
における圧力を所定の圧力に維持するために加圧ポンプ
の回転数を上げると、外の端末管における圧力が必要以
上に高くなることも予想される。しかし、実際には大方
の端末管における水道圧も時間帯によって同様に変動す
るので、外の端末管における圧力が必要以上に高くなる
としても、その程度は格別大きいものではない。また、
近年の水道本管はダクタイル鋳鉄管、高強度プラスチッ
ク等の強度に優れた材料で作られている（耐圧能力は１
０〜１５ｋｇ／ｃｍ2）ので、外の端末管における圧力
が必要以上に高くなることが水道本管の強度に影響する
ことはない。なお、特定地域の上水道システムについて
は、上記の運転を継続し、加圧ポンプの運転データを収
集し、これを基に一日の運転プログラムを作成して、こ
れによって加圧ポンプをプログラム制御することもでき
るが、この場合も、各水道本管の各端末管の圧力は季節
によって変動するので、適宜圧力検知装置により圧力計
測データを収集し、これに応じてプログラムを適宜変更
することが必要である。[Operation] The water pressure in each main terminal pipe is detected by the pressure detection device provided in the main terminal pipe of the water main, and when the detected pressure of any one of the main pipes is lower than the predetermined pressure, the Control the rotation speed of the pressure pump to increase the pressurization pressure,
This restores the water pressure in the terminal pipe.
When the detected pressures of all the terminal pipes are equal to or higher than the predetermined value, the rotation speed of the pressurizing pump is reduced so that the water supply pressure in the terminal pipe having the lowest water supply pressure is maintained at the predetermined pressure. The water pressure of each terminal is high during the time when the water consumption is low, and the water pressure of most terminals is low during the time when the water consumption is high, so the pressure pump is low during the time when the water consumption is low. It is controlled by the rotation speed, and the pressurizing pump is controlled by the high rotation speed during the time period when the water consumption is high. Therefore, the most efficient control of water pressure is performed. The cost to attach a pressure detection device to each terminal is significantly lower than that to attach a pressure pump to each terminal pipe, and the pressure measurement information in each terminal pipe is sent to the control device wirelessly. Among the signals from the transmitters of all terminal pipes, the one with the lowest pressure is used as the reference, and the pressurizing pump is controlled so that it recovers to the specified pressure. It is significantly less expensive than the case where a pressure pump is attached to the pipe. For example,
In a water supply system that can sufficiently respond to the head pressure of the reservoir during times when consumption is relatively low, pressurization by the pressurizing pump will not be performed during those times.
Pressurization by the pressurizing pump is performed only during a time period when the consumption amount is relatively high. Since the rotation speed of the pressurizing pump is controlled steplessly by the inverter, the control of its discharge pressure is performed easily and precisely, and pressurization to a higher pressure than necessary is avoided. When the rotation speed of the pressurizing pump is increased in order to maintain the pressure at a specific terminal of the water mains at a predetermined pressure, it is also expected that the pressure at the outer terminal pipe becomes higher than necessary. However, in practice, the water pressure in most of the terminal pipes also varies depending on the time zone, so even if the pressure in the outer terminal pipe becomes higher than necessary, the degree is not particularly large. Also,
Recent water mains are made of materials with excellent strength such as ductile cast iron pipes and high-strength plastics (pressure resistance is 1
Since the pressure is 0 to 15 kg / cm 2 ), an excessively high pressure in the outer terminal pipe does not affect the strength of the water mains. Regarding the water supply system in a specific area, continue the above operation, collect the operation data of the pressurizing pump, create an operating program for one day based on this, and program-control the pressurizing pump by this. However, in this case as well, the pressure of each terminal pipe of each water main varies depending on the season, so it is necessary to collect pressure measurement data with a pressure detection device and change the program accordingly. Is.
【０００６】[0006]
【実 施 例】次いで、既設の上水道システムに本発明
を適用した簡単な実施例を図面を参照しつつ説明する。
所定の高さの位置に配水池１が設けられており、この配
水池１に接続した水道本管２にゲート弁３を設けてい
る。配水池１に水中ポンプ４を設置し、その吐出管４ａ
を既設のゲート弁３に接続している。この水中ポンプ４
はその最大吐出圧力が３．０ｋｇ／ｃｍ2である。水道
本管２に多数の主要端末管５が接続されており、この主
要端末管５に圧力検知装置６を配置し、この圧力検知装
置６に送信機７を接続している。配水池１に制御装置８
が付設してあり、この制御装置８に受信機９を接続して
いる。上記端末管５の水圧は常時圧力検知装置６によっ
て計測され、その計測情報は送信機７から発信され、制
御装置８の受信機９によって受信される。上記端末管５
のいずれもその水圧が所定値以下に低下しない場合は、
水中ポンプは作動せず、配水池の水頭圧によって給水が
なされる。該端末管５のいずれかの水圧が所定の基準値
以下に低下すると、基準値と計測値との差に応じた回転
速度で水中ポンプ４を運転し、これによって当該端末管
５の水圧を所定の圧力まで回復させる。この水中ポンプ
の制御の仕方としては種々の方法を採ることができる
が、通常の上水道の末端圧力は１．２ｋｇ／ｃｍ2以上
と規定されているので、基準圧力が１．２ｋｇ／ｃｍ2
であるとすれば、１．２±０．２ｋｇ／ｃｍ2とし、フ
ィードバック制御して水中ポンプの回転速度を制御すれ
ばよく、あるいは、基準値と実測値との差をとり、この
差を基準としてポンプの回転速度を定めてその速度で定
速運転し、例えば１０分間隔で各端末管の水圧をチェッ
クして、基準圧力と実測値との差を点検し、その結果に
よってポンプの回転速度を逐次設定するようにすること
もできる。給水圧力が低下した上水道システムの圧力を
以上のようにして回復することができるが、水中ポンプ
を最大回転速度で運転すると３．０ｋｇ／ｃｍ2だけ加
圧される。したがって、配水池の高さを３０ｍ高くして
給水圧力を回復するのと同じ効果を有する。[Example] Next, a simple example in which the present invention is applied to an existing water supply system will be described with reference to the drawings.
A distribution reservoir 1 is provided at a predetermined height position, and a gate valve 3 is provided in a water main 2 connected to this distribution reservoir 1. Submersible pump 4 is installed in distribution reservoir 1 and its discharge pipe 4a
Is connected to the existing gate valve 3. This submersible pump 4
Has a maximum discharge pressure of 3.0 kg / cm 2 . A large number of main terminal pipes 5 are connected to the water mains 2, a pressure detecting device 6 is arranged in the main terminal pipe 5, and a transmitter 7 is connected to the pressure detecting device 6. Control device 8 in distribution reservoir 1
Is attached, and the receiver 9 is connected to the control device 8. The water pressure of the terminal pipe 5 is constantly measured by the pressure detection device 6, and the measurement information is transmitted from the transmitter 7 and received by the receiver 9 of the control device 8. Terminal tube 5
If the water pressure does not drop below the specified value,
The submersible pump does not operate, and water is supplied by the head pressure of the reservoir. When the water pressure of any of the terminal pipes 5 falls below a predetermined reference value, the submersible pump 4 is operated at a rotation speed corresponding to the difference between the reference value and the measured value, whereby the water pressure of the terminal pipe 5 is set to a predetermined value. Restore the pressure up to. Although various methods can be adopted for controlling the submersible pump, the standard pressure is 1.2 kg / cm 2 because the terminal pressure of normal water supply is regulated to be 1.2 kg / cm 2 or more.
If so, 1.2 ± 0.2 kg / cm 2 may be set, and the rotational speed of the submersible pump may be controlled by feedback control. Alternatively, the difference between the reference value and the actual measurement value may be taken and this difference is used as the reference. The rotation speed of the pump is set as a constant speed operation at that speed, the water pressure of each terminal pipe is checked at intervals of 10 minutes, and the difference between the reference pressure and the actual measurement value is checked. Can also be set sequentially. The pressure of the water supply system with the reduced water supply pressure can be recovered as described above, but when the submersible pump is operated at the maximum rotation speed, it is pressurized by 3.0 kg / cm 2 . Therefore, it has the same effect as increasing the height of the distribution reservoir by 30 m to restore the water supply pressure.
【０００７】[0007]
【効 果】以上のとおり、本発明は給水家屋の増大、端
末管の増設等によって、全体的にあるいは部分的に所定
の圧力によって給水することができなくなった上水道シ
ステムについて、簡単な装置を付加することによって所
定の給水圧力を回復することができ、また、水道水の消
費量の変動に伴う各端末管の圧力低下に対して、柔軟か
つ容易に対応することができ、また、その設備費、運転
費用を可及的に低減することができる。また、インバー
ターによる回転速度の制御によりポンプ吐出圧力を連続
的に変化させるものであるから、水道本管の各端末管の
水圧変動に対応するためのポンプ回転速度の制御を簡単
な制御装置によって容易、かつ精緻に行うことができ
る。[Effects] As described above, the present invention adds a simple device to a water supply system in which it is impossible to supply water at a predetermined pressure wholly or partially due to an increase in water supply houses and the addition of terminal pipes. By doing so, the prescribed water supply pressure can be restored, and it is possible to flexibly and easily respond to the pressure drop of each terminal pipe due to the fluctuation of the consumption of tap water, and the equipment cost thereof. The operating cost can be reduced as much as possible. In addition, since the pump discharge pressure is continuously changed by controlling the rotation speed by the inverter, it is easy to control the pump rotation speed to cope with the water pressure fluctuation of each terminal pipe of the water main by using a simple control device. And, it can be done with precision.
【図１】本発明の実施例の概念図である。FIG. 1 is a conceptual diagram of an embodiment of the present invention.
１・・・配水池 ２・・・水道本管 ３・・・ゲート弁 ４ａ・・・吐出管 ４・・・水中ポンプ ５・・・主要端末管 ６・・・圧力検知装置 ７・・・送信機 ８・・・制御装置 ９・・・受信機 1 ... Distribution reservoir 2 ... Water main 3 ... Gate valve 4a ... Discharge pipe 4 ... Submersible pump 5 ... Main terminal pipe 6 ... Pressure detection device 7 ... Transmission Machine 8 ... Control device 9 ... Receiver
Claims (1)
各家庭に上水を供給する上水道システムにおいて、 配水池に加圧ポンプを付設し、その回転速度を制御装置
によって無段階に制御し、 水道本管の主要端末管に圧力検出装置を設け、この圧力
検出装置によって計測した主要端末管の圧力情報を上記
制御装置に無線送信するようにし、 上記制御装置はインバーターを有し、この制御装置によ
って、上記圧力情報に基づいて主要端末管の水圧が所定
の圧力に回復するように加圧ポンプの回転速度を制御す
るようにした上水道システム。1. In a water supply system for supplying clean water from a large distribution reservoir to each household via a water main and branch pipes, a pressure pump is attached to the distribution reservoir and its rotation speed is controlled by a controller. The pressure control device is installed in the main terminal pipe of the water mains, and the pressure information of the main terminal pipe measured by this pressure detection device is wirelessly transmitted to the control device.The control device has an inverter. The control system controls the rotation speed of the pressurizing pump so that the water pressure of the main terminal pipe is restored to a predetermined pressure based on the pressure information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13114695A JPH08302758A (en) | 1995-05-02 | 1995-05-02 | Water supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13114695A JPH08302758A (en) | 1995-05-02 | 1995-05-02 | Water supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08302758A true JPH08302758A (en) | 1996-11-19 |
Family
ID=15051085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13114695A Pending JPH08302758A (en) | 1995-05-02 | 1995-05-02 | Water supply system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08302758A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016030981A (en) * | 2014-07-30 | 2016-03-07 | 株式会社タブチ | Water supply structure |
-
1995
- 1995-05-02 JP JP13114695A patent/JPH08302758A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016030981A (en) * | 2014-07-30 | 2016-03-07 | 株式会社タブチ | Water supply structure |
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