JPH08246511A - Variable speed water service installation - Google Patents
Variable speed water service installationInfo
- Publication number
- JPH08246511A JPH08246511A JP8074595A JP8074595A JPH08246511A JP H08246511 A JPH08246511 A JP H08246511A JP 8074595 A JP8074595 A JP 8074595A JP 8074595 A JP8074595 A JP 8074595A JP H08246511 A JPH08246511 A JP H08246511A
- Authority
- JP
- Japan
- Prior art keywords
- pump
- pressure
- discharge
- inflow
- speed
- 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
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は可変速給水装置に係り、
特に配水管から加圧ポンプを介して直接末端給水機器へ
と連結された、いわゆる直結型の可変速給水装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable speed water supply device,
In particular, it relates to a so-called direct connection type variable speed water supply device, which is directly connected to a terminal water supply device from a water distribution pipe via a pressure pump.
【０００２】[0002]
【従来の技術】図１は、直結型可変速給水装置のシステ
ム概要を示す。例えば、水道の本管である配水管１１に
は流入管１２が接続され、加圧ポンプ１３がこの流入管
に接続されている。流入管１２には、量水器１５が接続
され、使用水量が計測される。加圧ポンプ１３の吐出側
には、末端給水機器１７へと連結された吐出管１８が接
続されている。吐出管１８には、フロースイッチ１９、
吐出側圧力タンク２０等が接続されている。又、加圧ポ
ンプ１３の吐出側には吐出圧力検出器２３が備えられ、
吐出側圧力信号を制御部２２に送る。2. Description of the Related Art FIG. 1 shows a system outline of a direct connection type variable speed water supply system. For example, an inflow pipe 12 is connected to a water distribution pipe 11 which is a main water pipe, and a pressurizing pump 13 is connected to the inflow pipe. A water meter 15 is connected to the inflow pipe 12, and the amount of water used is measured. A discharge pipe 18 connected to the terminal water supply device 17 is connected to the discharge side of the pressurizing pump 13. The discharge pipe 18 has a flow switch 19,
The discharge side pressure tank 20 and the like are connected. Further, a discharge pressure detector 23 is provided on the discharge side of the pressurizing pump 13,
The discharge side pressure signal is sent to the control unit 22.
【０００３】ポンプ１３は、三相２００Ｖの商用電源に
接続された周波数・電圧変換装置（インバータ）２５を
介して電動機により可変速で駆動される。制御部２２
は、吐出圧力検出器２３の信号に基づき、可変速駆動手
段２５に信号を送り、ポンプ１３の回転数を任意の速度
に加速又は減速制御する。The pump 13 is driven at a variable speed by an electric motor through a frequency / voltage converter (inverter) 25 connected to a three-phase 200V commercial power source. Control unit 22
Sends a signal to the variable speed drive means 25 based on the signal of the discharge pressure detector 23 to control the rotation speed of the pump 13 to an arbitrary speed.
【０００４】係る直結型の可変速給水装置においては、
従来の配水管に貯水槽を接続し、貯水槽に貯えられた水
を加圧ポンプを用いて末端給水機器へ分配するのと比較
して、種々のメリットがある。そのメリットは、貯水槽
を設けないため、給水装置を全体として小型化でき、又
設置面積を小さくできる。又、水が貯留されないので、
衛生上好ましい。更に、配水管の水圧をそのまま加圧ポ
ンプの吸込側に利用できるため、加圧ポンプの揚程が低
くなり、その分省エネルギー化ができる等である。In such a direct connection type variable speed water supply device,
There are various merits as compared with the conventional method of connecting a water storage tank to a water distribution pipe and distributing the water stored in the water storage tank to the terminal water supply equipment using a pressure pump. The merit is that since the water tank is not provided, the water supply device can be downsized as a whole and the installation area can be reduced. Also, because water is not stored,
Hygienic preferred. Further, since the water pressure of the water distribution pipe can be used as it is on the suction side of the pressurizing pump, the head of the pressurizing pump is lowered, and energy can be saved accordingly.
【０００５】しかしながら、従来の貯水槽を用いた可変
速給水装置においては、加圧ポンプの流入側は貯水槽に
接続されており、貯水槽はその上部が大気に開放されて
いる。このため、加圧ポンプの流入側の圧力は貯水槽の
水位に基づく圧力のみがかかっている。このため、ポン
プの吐出側の流量がゼロの場合であっても、吐出側の最
低圧力を保つため、ポンプ下限速度を設けて運転を継続
するのが通例であった。However, in the conventional variable speed water supply system using the water tank, the inflow side of the pressurizing pump is connected to the water tank, and the upper part of the water tank is open to the atmosphere. Therefore, the pressure on the inflow side of the pressurizing pump is only the pressure based on the water level in the water storage tank. Therefore, even if the flow rate on the discharge side of the pump is zero, in order to maintain the minimum pressure on the discharge side, it is customary to set the pump lower limit speed and continue the operation.
【０００６】ところが、直結型の可変速給水装置ではポ
ンプの流入側の流入圧力は、配水管の水圧に大きく依存
するので、ポンプの設定吐出圧力を上回る場合が生じ
る。このような場合に前述したポンプ下限速度で運転を
継続した場合には、末端給水機器における水圧が上昇し
過ぎて、使用者側に不用意な迷惑をかけるばかりでな
く、エネルギーの無駄であり、省エネルギーの観点から
も好ましいものではなかった。However, in the direct-coupling type variable speed water supply apparatus, the inflow pressure on the inflow side of the pump largely depends on the water pressure of the water distribution pipe, so that it may exceed the set discharge pressure of the pump. In such a case, when the operation is continued at the above-mentioned pump lower limit speed, the water pressure in the terminal water supply device rises excessively, not only inadvertently annoying the user, but also a waste of energy, It was not preferable from the viewpoint of energy saving.
【０００７】[0007]
【発明が解決しようとする課題】特開平５−２４０１８
６号公報には、概略図１に示す構成の直結型の可変速給
水装置が開示されている。そして、ポンプの流入側に圧
力検出器を設け、ポンプの流入圧力が吐出設定圧力より
一定以上高くなるとポンプを停止させ、吐出設定圧力よ
り一定以上低くなるとポンプを再始動させて上述した問
題点を回避する技術が開示されている。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
Japanese Patent Publication No. 6 discloses a direct connection type variable speed water supply device having a configuration schematically shown in FIG. Then, a pressure detector is provided on the inflow side of the pump to stop the pump when the inflow pressure of the pump is higher than the discharge set pressure by a certain amount or more, and restart the pump when the inflow pressure of the pump is lower than the discharge set pressure by a certain amount or more to solve the above problems. Techniques to avoid are disclosed.
【０００８】この制御フローを図５に示す。制御装置
は、まずポンプの流入側圧力ＰS を読み込む。そして、
吐出設定圧力Ｐ1よりも一定圧力α以上、流入圧力ＰS
が高い場合にはポンプを停止する。そして、流入圧力Ｐ
S が吐出設定圧力Ｐ1 よりも一定圧力α以下に低下した
場合にポンプを再始動させる。尚、吸込圧力ＰS がその
間にある場合には、吐出圧力を一定とする制御が行われ
る。This control flow is shown in FIG. The control device first reads the inflow side pressure P S of the pump. And
Discharge setting pressure P1 above a certain pressure α, inflow pressure P S
If is high, stop pump. And the inflow pressure P
The pump is restarted when S drops below the discharge set pressure P1 to a constant pressure α or less. If the suction pressure P S is in the meantime, the discharge pressure is controlled to be constant.
【０００９】このようなポンプの発停制御結果の一例を
図６に示す。ポンプの再始動が吸込側圧力ＰS が吐出設
定圧力Ｐ1 よりも一定圧力α以下になった時に行われる
ため、図示するようにポンプの停止時に吐出圧力が低下
し、末端給水機器に所定の水圧を供給できないという問
題が生じる。FIG. 6 shows an example of the start / stop control result of such a pump. Since the pump is restarted when the suction side pressure P S becomes lower than the discharge set pressure P 1 by a constant pressure α or less, the discharge pressure is reduced when the pump is stopped as shown in the figure, and the predetermined water pressure is applied to the terminal water supply device. The problem of not being able to supply is generated.
【００１０】本発明は上述した事情に鑑みて為されたも
ので、ポンプの流入圧力が上昇した場合に、簡単な構成
で確実にポンプの運転を停止して、末端給水機器への余
分な水圧の上昇を避けることができる直結型の可変速給
水装置を提供することを目的とする。The present invention has been made in view of the above-mentioned circumstances. When the inflow pressure of the pump rises, the pump operation can be reliably stopped with a simple structure so that excess water pressure to the terminal water supply equipment can be obtained. It is an object of the present invention to provide a direct connection type variable speed water supply device capable of avoiding the rise of water.
【００１１】[0011]
【課題を解決するための手段】本発明の可変速給水装置
は、配水管に接続された流入管と、この流入管に接続さ
れた加圧ポンプと、この加圧ポンプの吐出側に接続され
末端給水機器へと連結された吐出管と、前記吐出管に設
けられた加圧ポンプの吐出圧力を検出する吐出圧力検出
器と、前記加圧ポンプを可変速駆動する可変速駆動手段
と、前記ポンプを可変速運転制御する制御手段とを備
え、該制御手段は、ポンプ吐出圧力があらかじめ定めら
れた吐出設定圧力になるように、ポンプ吐出圧力が吐出
設定圧力よりも高い時はポンプ速度を下げ、ポンプ吐出
圧力が吐出設定圧力よりも低い時はポンプ速度を上げて
前記ポンプの速度を制御する吐出圧力制御手段を備え、
前記ポンプの流入側の圧力が上昇してポンプ吐出圧力が
前記吐出設定圧力よりも高い圧力となった時は、前記ポ
ンプ速度をゼロ迄減速させる手段を備えたことを特徴と
する。The variable speed water supply apparatus of the present invention is connected to an inflow pipe connected to a water distribution pipe, a pressurizing pump connected to the inflow pipe, and a discharge side of the pressurizing pump. A discharge pipe connected to the terminal water supply device, a discharge pressure detector for detecting the discharge pressure of a pressurizing pump provided in the discharge pipe, a variable speed drive means for driving the pressurizing pump at a variable speed, And a control means for controlling the pump at a variable speed, the control means decreasing the pump speed when the pump discharge pressure is higher than the discharge set pressure so that the pump discharge pressure becomes a predetermined discharge set pressure. A discharge pressure control means for increasing the pump speed to control the speed of the pump when the pump discharge pressure is lower than the discharge set pressure,
When the pressure on the inflow side of the pump rises and the pump discharge pressure becomes higher than the discharge set pressure, there is provided means for reducing the pump speed to zero.
【００１２】又、前記加圧ポンプの流入側と吐出側に連
通したバイパス管路と、該管路に挿入され吐出側から流
入側への逆流を阻止する逆流防止弁を更に備えたことを
特徴とする。Further, the present invention further comprises a bypass pipe communicating with the inflow side and the discharge side of the pressurizing pump, and a backflow preventing valve which is inserted into the pipe and prevents a backflow from the discharge side to the inflow side. And
【００１３】[0013]
【作用】ポンプの流入側の圧力が上昇して、ポンプの吐
出圧力がその設定圧力よりも高くなった時は、ポンプ停
止迄減速させることから、ポンプの運転停止により吐出
側の圧力が流入圧力以上に上らない。このため、確実に
末端給水機器への水圧上昇が防止されると共に、無駄な
ポンプ運転が防止され省エネルギー化できる。また、ポ
ンプ吐出側圧力が吐出設定圧力Ｐ1 迄低下した時には、
ポンプは直ちに再始動して吐出圧力をその設定圧力とな
るように運転される。このため、吐出圧力がポンプ停止
期間中に低下するという問題が防止される。[Operation] When the pressure on the inflow side of the pump rises and the discharge pressure of the pump becomes higher than the set pressure, it is decelerated until the pump is stopped. No more. For this reason, it is possible to reliably prevent an increase in water pressure to the terminal water supply device, prevent unnecessary pump operation, and save energy. Also, when the pump discharge side pressure drops to the discharge set pressure P1,
The pump is immediately restarted and operated so that the discharge pressure becomes the set pressure. Therefore, it is possible to prevent the problem that the discharge pressure decreases during the pump stop period.
【００１４】また、ポンプの吐出側のみの圧力検出器で
流入圧力上昇時のポンプ停止制御を行うことができる。
このため、流入側の圧力検出器が不要となるか、又は流
入側水圧低下の検出のために必要であれば、より精度の
低いものとすることができる。尚、ポンプの吐出側に
は、もともと吐出圧力を一定に保つ吐出制御のため、圧
力検出器が必要であり、この圧力検出器を共用できる。Further, the pump stop control when the inflow pressure rises can be performed by the pressure detector only on the discharge side of the pump.
Therefore, the pressure detector on the inflow side becomes unnecessary, or if it is necessary for detecting the decrease in water pressure on the inflow side, the accuracy can be made lower. It should be noted that a pressure detector is required on the discharge side of the pump in order to keep the discharge pressure constant, and this pressure detector can be shared.
【００１５】更にバイパス管路と逆流防止弁を設けるこ
とから、ポンプの停止により、流入圧力が吐出圧力より
も高い場合には、ポンプの圧損を生じることなく、流入
圧力を吐出側に供給できる。逆に、流入圧力が低下した
場合には、逆流防止弁で逆流が妨げられ、吐出圧力が設
定吐出圧力以下になったならばポンプが起動して、吐出
圧力は、一定の設定圧力となるように運転が再開され
る。Further, since the bypass line and the check valve are provided, when the inflow pressure is higher than the discharge pressure due to the stop of the pump, the inflow pressure can be supplied to the discharge side without causing pressure loss of the pump. On the contrary, when the inflow pressure drops, the backflow is blocked by the backflow prevention valve, and if the discharge pressure becomes lower than the set discharge pressure, the pump starts and the discharge pressure becomes a constant set pressure. The operation is restarted.
【００１６】[0016]
【実施例】以下、本発明の一実施例について図１乃至図
４を参照しながら説明する。尚、各図中同一符号は同一
又は相当部分を示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the drawings, the same reference numerals indicate the same or corresponding parts.
【００１７】本実施例においても、配水管１１に加圧ポ
ンプ１３が直結され、末端給水機器１７に給水するシス
テム構成は図１に示すとおりである。本実施例において
は、加圧ポンプ１３は吐出圧力検出器２３の信号によ
り、末端給水機器１７への供給水圧が一定となるよう
に、可変速駆動手段２５でポンプ回転速度を増減してポ
ンプ１３の吐出圧力Ｐd を一定圧力Ｐ1 に制御する吐出
圧力制御が行われる。また、ポンプ１３の吐出側と流入
側を連結するバイパス管路１４が接続されており、ポン
プ１３をバイパスする流路となっている。バイパス管路
１４及び吐出管１８には、それぞれ逆流防止弁（チェッ
キ弁）１６が設けられている。Also in this embodiment, the system configuration in which the pressurizing pump 13 is directly connected to the water distribution pipe 11 to supply water to the terminal water supply equipment 17 is as shown in FIG. In the present embodiment, the pressurizing pump 13 increases or decreases the pump rotation speed by the variable speed drive means 25 so that the water supply pressure to the terminal water supply device 17 becomes constant by the signal of the discharge pressure detector 23. The discharge pressure control is performed to control the discharge pressure P d of the above to a constant pressure P1. Further, a bypass pipe line 14 that connects the discharge side and the inflow side of the pump 13 is connected, and serves as a flow path that bypasses the pump 13. A check valve 16 is provided in each of the bypass pipe 14 and the discharge pipe 18.
【００１８】図２は、本発明の一実施例の可変速給水装
置の制御部分の構成を示す。制御部２２には、吐出圧力
検出器２３から加圧ポンプ１３の吐出側の圧力Ｐd が入
力される。設定圧力Ｐ1 は、吐出圧力の制御目標値であ
り、通常２〜３ｋｇ／ｃｍ2に設定される。FIG. 2 shows the configuration of the control portion of the variable speed water supply system according to an embodiment of the present invention. The pressure P d on the discharge side of the pressurizing pump 13 is input to the control unit 22 from the discharge pressure detector 23. Set pressure P1 is a control target value of the discharge pressure, is usually set to 2-3 kg / cm 2.
【００１９】図３は、吐出圧力制御のフローを示す。吐
出圧力検出器２３よりポンプ１３の吐出側の吐出圧力Ｐ
d を読み込み、設定圧力Ｐ1 と比較する。吐出圧力Ｐd
が設定圧力Ｐ1 よりも高い場合には、ポンプ速度をゼロ
迄徐々に下げる減速指令が出される。また、吐出圧力検
出器２３で検出された吐出圧力Ｐd が目標値である設定
圧力Ｐ1 よりも低い場合には、ポンプ速度を上げる増速
指令を出し、可変速駆動手段２５によりポンプ１３を増
速し、吐出圧力Ｐd を目標値である設定圧力Ｐ1 に近づ
ける。尚、ポンプ速度がゼロであり、即ち、ポンプが停
止している時は、ポンプが発進し、徐々にその速度を上
げる。FIG. 3 shows the flow of discharge pressure control. Discharge pressure P on the discharge side of the pump 13 from the discharge pressure detector 23
Read d and compare with the set pressure P1. Discharge pressure P d
Is higher than the set pressure P1, a deceleration command is issued to gradually reduce the pump speed to zero. When the discharge pressure P d detected by the discharge pressure detector 23 is lower than the set pressure P 1 which is the target value, a speed increasing command for increasing the pump speed is issued and the variable speed drive means 25 increases the pump 13. Then, the discharge pressure P d is brought close to the set pressure P 1 which is the target value. When the pump speed is zero, that is, when the pump is stopped, the pump starts and gradually increases its speed.
【００２０】図４は、本発明の一実施例の可変速給水装
置による吐出圧力Ｐd の制御結果の一例を示す。流入圧
力Ｐs が、吐出設定圧力Ｐ1 よりも低い場合には、制御
部２２は図３に示すフローに従って、Ｐd ＝Ｐ1 となる
ように、可変速駆動装置２５でポンプ速度が制御され
る。この結果、ポンプの吐出圧力はほぼ一定圧力Ｐ1 に
保たれる。FIG. 4 shows an example of the control result of the discharge pressure P d by the variable speed water supply system according to one embodiment of the present invention. When the inflow pressure P s is lower than the discharge set pressure P1, the control unit 22 controls the pump speed by the variable speed drive device 25 so that P d = P1 according to the flow shown in FIG. As a result, the discharge pressure of the pump is maintained at a substantially constant pressure P1.
【００２１】例えば、配水管１１の水圧が上昇してポン
プ１３の流入圧力が吐出設定圧力Ｐ1 に達すると、ポン
プ速度がゼロでない場合には、吐出圧力Ｐd がＰ1 より
も高くなる。この場合には、図３に示す制御フローに従
って、可変速駆動装置２５に制御部２２より減速指令が
出される。ポンプ１３は速度ゼロ迄徐々に減速され、そ
の後停止状態となる。この状態では、流入圧力がそのま
まバイパス管路１４を通って吐出側に供給され、吐出圧
力は流入圧力と略等しい状態となる。For example, when the water pressure in the water pipe 11 rises and the inflow pressure of the pump 13 reaches the discharge set pressure P1, the discharge pressure P d becomes higher than P1 if the pump speed is not zero. In this case, the control unit 22 issues a deceleration command to the variable speed drive device 25 in accordance with the control flow shown in FIG. The pump 13 is gradually decelerated to zero speed, and then stopped. In this state, the inflow pressure is supplied as it is to the discharge side through the bypass line 14, and the discharge pressure becomes substantially equal to the inflow pressure.
【００２２】そして、配水管１１の水圧の低下等に伴
い、ポンプ１３が停止した状態で吐出圧力Ｐd が、吐出
設定圧力Ｐ1 以下に低下すると、図３に示すフローで Ｐd ＜Ｐ1 となり、ポンプ１３に増速指令が出され、ポンプ１３は
再始動する。そして、ポンプは徐々に増速され、吐出圧
力Ｐd が設定圧力Ｐ1 に到達する。その後は、ポンプ１
３の回転速度が増減され、吐出圧力Ｐd が設定吐出圧力
Ｐ1 となるように制御される。When the discharge pressure P d drops below the discharge set pressure P1 while the pump 13 is stopped due to a decrease in the water pressure in the water distribution pipe 11, P d <P1 in the flow shown in FIG. A speed-up command is issued to the pump 13, and the pump 13 is restarted. The pump is gradually accelerated, the discharge pressure P d reaches the set pressure P1. After that, pump 1
The rotation speed of No. 3 is increased / decreased, and the discharge pressure P d is controlled to be the set discharge pressure P1.
【００２３】このように本発明においては、ポンプの流
入圧力が上昇して、ポンプによる加圧が必要でない時に
は、ポンプの吐出圧力制御の一部としてポンプの発停が
制御される。As described above, in the present invention, when the inflow pressure of the pump rises and pressurization by the pump is not necessary, the start / stop of the pump is controlled as a part of the discharge pressure control of the pump.
【００２４】尚、上述した実施例では、吐出圧力Ｐd が
設定圧力を超えたならば、ポンプを停止する例について
説明したが、小水量時には更に一定時間加圧して畜圧タ
ンクに畜圧した後に、ポンプの運転を停止するようにし
ても勿論よい。In the embodiment described above, the pump is stopped when the discharge pressure P d exceeds the set pressure. However, when the amount of water is small, the pump is further pressurized for a certain period of time to be stored in the storage tank. Of course, the operation of the pump may be stopped later.
【００２５】[0025]
【発明の効果】以上に説明したように、本発明によれ
ば、直結型の可変速給水装置において、ポンプの流入圧
力が上昇し吐出圧力がその設定圧力を超えた場合には、
直ちにポンプを停止し、その後流入圧力が低下して、吐
出圧力がその設定圧力以下になった場合には、直ちにポ
ンプを再始動することができる。このため、過大流入圧
力時に省エネルギー化を達成しつつ、末端給水機器にお
ける水圧の低下という問題を回避できる。更に、流入側
圧力センサが不要もしくは精度を必要としなくなるた
め、装置コストを低減することができる。As described above, according to the present invention, in the direct connection type variable speed water supply apparatus, when the inflow pressure of the pump rises and the discharge pressure exceeds the set pressure,
Immediately when the pump is stopped and then the inflow pressure drops and the discharge pressure becomes equal to or lower than the set pressure, the pump can be immediately restarted. For this reason, it is possible to avoid the problem of a decrease in water pressure in the terminal water supply equipment while achieving energy saving when the inflow pressure is excessive. Further, since the inflow side pressure sensor is unnecessary or does not require accuracy, the device cost can be reduced.
【図１】直結型の可変速給水装置のシステム構成の説明
図。FIG. 1 is an explanatory diagram of a system configuration of a direct connection type variable speed water supply device.
【図２】本発明の一実施例の可変速給水装置の制御系の
説明図。FIG. 2 is an explanatory diagram of a control system of the variable speed water supply apparatus according to the embodiment of the present invention.
【図３】本発明の一実施例の吐出圧力制御のフロー図。FIG. 3 is a flow chart of discharge pressure control according to an embodiment of the present invention.
【図４】本発明の一実施例の可変速給水装置による制御
結果の一例を示すグラフ。FIG. 4 is a graph showing an example of a control result by the variable speed water supply apparatus according to the embodiment of the present invention.
【図５】従来の過大流入圧力時の制御の一例を示すフロ
ー図。FIG. 5 is a flow chart showing an example of conventional control at the time of excessive inflow pressure.
【図６】上記フローに従った制御結果の一例を示すグラ
フ。FIG. 6 is a graph showing an example of a control result according to the above flow.
２２ 制御部 ２３ 吐出圧力検出器 ２５ 可変速駆動手段（インバータ） ＰS 流入圧力 Ｐd 吐出圧力 Ｐ1 吐出設定圧力22 Control unit 23 Discharge pressure detector 25 Variable speed drive means (inverter) P S Inflow pressure P d Discharge pressure P1 Discharge set pressure
Claims (2)
管に接続された加圧ポンプと、この加圧ポンプの吐出側
に接続され末端給水機器へと連結された吐出管と、前記
吐出管に設けられた加圧ポンプの吐出圧力を検出する吐
出圧力検出器と、前記加圧ポンプを可変速駆動する可変
速駆動手段と、前記ポンプを可変速運転制御する制御手
段とを備え、 該制御手段は、ポンプ吐出圧力があらかじめ定められた
吐出設定圧力になるように、ポンプ吐出圧力が吐出設定
圧力よりも高い時はポンプ速度を下げ、ポンプ吐出圧力
が吐出設定圧力よりも低い時はポンプ速度を上げて前記
ポンプの速度を制御する吐出圧力制御手段を備え、 前記ポンプの流入側の圧力が上昇してポンプ吐出圧力が
前記吐出設定圧力よりも高い圧力となった時は、前記ポ
ンプ速度をゼロ迄減速させる手段を備えたことを特徴と
する可変速給水装置。1. An inflow pipe connected to a water distribution pipe, a pressurizing pump connected to the inflow pipe, a discharge pipe connected to a discharge side of the pressurizing pump and connected to an end water supply device, A discharge pressure detector for detecting the discharge pressure of a pressurizing pump provided in the discharge pipe, a variable speed drive means for driving the pressurizing pump at a variable speed, and a control means for controlling the pump at a variable speed are provided. The control means reduces the pump speed when the pump discharge pressure is higher than the discharge set pressure so that the pump discharge pressure becomes a predetermined discharge set pressure, and when the pump discharge pressure is lower than the discharge set pressure. A discharge pressure control means for increasing the pump speed to control the speed of the pump is provided, and when the pressure on the inflow side of the pump increases and the pump discharge pressure becomes higher than the discharge set pressure, the pump speed Variable speed water supply apparatus characterized by comprising means for decelerating to zero.
したバイパス管路と、該管路に挿入され吐出側から流入
側への逆流を阻止する逆流防止弁を更に備えたことを特
徴とする請求項１記載の可変速給水装置。2. A bypass line communicating with the inflow side and the discharge side of the pressurizing pump, and a backflow prevention valve that is inserted into the line and blocks a backflow from the discharge side to the inflow side. The variable speed water supply device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08074595A JP3241963B2 (en) | 1995-03-13 | 1995-03-13 | Variable speed water supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08074595A JP3241963B2 (en) | 1995-03-13 | 1995-03-13 | Variable speed water supply |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21564397A Division JPH1068148A (en) | 1997-07-25 | 1997-07-25 | Water supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08246511A true JPH08246511A (en) | 1996-09-24 |
| JP3241963B2 JP3241963B2 (en) | 2001-12-25 |
Family
ID=13726947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08074595A Expired - Lifetime JP3241963B2 (en) | 1995-03-13 | 1995-03-13 | Variable speed water supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3241963B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011134455A3 (en) * | 2010-04-30 | 2012-04-26 | Gep Industrie-Systeme Gmbh | Method and system for carrying out closed-loop or open-loop control of the water pressure in a pressure zone and device for carrying out and for operating same |
| CN102784449A (en) * | 2012-07-18 | 2012-11-21 | 北京中卓时代消防装备科技有限公司 | Remote automatic water supply system |
| EP2615306A4 (en) * | 2011-04-11 | 2015-07-08 | Fuji Electric Co Ltd | Water supply pump control device |
-
1995
- 1995-03-13 JP JP08074595A patent/JP3241963B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011134455A3 (en) * | 2010-04-30 | 2012-04-26 | Gep Industrie-Systeme Gmbh | Method and system for carrying out closed-loop or open-loop control of the water pressure in a pressure zone and device for carrying out and for operating same |
| EP2975183A1 (en) * | 2010-04-30 | 2016-01-20 | GEP Industrie-Systeme GmbH | Method and system for water pressure regulation or control in a pressure zone |
| DE202011110761U1 (en) | 2010-04-30 | 2016-03-07 | GEP Industrie Systeme GmbH | System for regulating or controlling the pressure in a pressure zone |
| EP2615306A4 (en) * | 2011-04-11 | 2015-07-08 | Fuji Electric Co Ltd | Water supply pump control device |
| CN102784449A (en) * | 2012-07-18 | 2012-11-21 | 北京中卓时代消防装备科技有限公司 | Remote automatic water supply system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3241963B2 (en) | 2001-12-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH04331653A (en) | Motor driven valve control hydraulic pump for feeding base pressure in brake pressure controller | |
| JPH08246511A (en) | Variable speed water service installation | |
| JP4212219B2 (en) | Electric pump device and control method thereof | |
| JP2872475B2 (en) | Water supply system | |
| JP3425269B2 (en) | Variable speed water supply | |
| JP3270287B2 (en) | Variable speed water supply | |
| JPH0123674B2 (en) | ||
| JP3288635B2 (en) | Water supply system | |
| JP4678799B2 (en) | Water supply apparatus and water supply apparatus control method | |
| JPH1068148A (en) | Water supply device | |
| JP3558808B2 (en) | Automatic water supply | |
| JP2899809B2 (en) | Automatic water supply method and device | |
| JPH10103251A (en) | Automatic water supply device | |
| JP3755942B2 (en) | Inverter unit for pump | |
| JPH08277781A (en) | Water feeding device | |
| JPH09268978A (en) | Variable speed water supply device | |
| JP3530913B2 (en) | Water supply device | |
| JP2004092387A (en) | Water supply device | |
| JP2845898B2 (en) | Method for improving the economics of operation of pressure raising devices and similar devices | |
| JP4014465B2 (en) | Water supply equipment | |
| JP3610190B2 (en) | Operation control method of drainage pump | |
| JPH0674794B2 (en) | Water pump operation controller | |
| JP3533428B2 (en) | Pump device and pump control device | |
| JP3558443B2 (en) | Variable speed water supply | |
| JP2532239Y2 (en) | Electric discharge valve control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |