JP2003120580A - Variable-speed water supply equipment - Google Patents
Variable-speed water supply equipmentInfo
- Publication number
- JP2003120580A JP2003120580A JP2002305837A JP2002305837A JP2003120580A JP 2003120580 A JP2003120580 A JP 2003120580A JP 2002305837 A JP2002305837 A JP 2002305837A JP 2002305837 A JP2002305837 A JP 2002305837A JP 2003120580 A JP2003120580 A JP 2003120580A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- pump
- water supply
- inflow
- discharge
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は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係り、特に給水水量の多い時
にも少ない時にも常に末端給水機器に供給される水圧を
一定とする、いわゆる推定末端圧力一定制御の可変速給
水装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called direct connection type variable speed water supply system in which a water distribution pipe is directly connected to a terminal water supply system via a pressure pump, and particularly when the water supply amount is large or small. The present invention relates to a variable speed water supply device of so-called estimated terminal pressure constant control, which constantly keeps the water pressure supplied to the terminal water supply device constant.
【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と流入
側圧力タンク１６とが接続されている。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、吐出側圧力タ
ンク２０等が接続されている。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 and an inflow side pressure tank 16 are connected to the inflow pipe 12. Pressure pump 13
A discharge pipe 18 connected to the terminal water supply device 17 is connected to the discharge side of the. A discharge side pressure tank 20 and the like are connected to the discharge pipe 18.
【０００３】加圧ポンプ１３の流入側には流入圧力検出
器２１が接続されており、加圧ポンプ１３の流入側の圧
力を検出し、その信号を制御部２２に送る。同様に、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、吐出側の圧力信号を制御部２２に送る。An inflow pressure detector 21 is connected to the inflow side of the pressurizing pump 13, detects the pressure on the inflow side of the pressurizing pump 13, and sends a signal to the controller 22. Similarly, a discharge pressure detector 23 is provided on the discharge side of the pressurizing pump 13, and sends a pressure signal on the discharge side to the control unit 22.
【０００４】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）を備え
た電動機２５（可変速手段）により可変速で駆動され
る。制御部２２は、流入圧力検出器２１及び吐出圧力検
出器２３の信号に基づき、可変速手段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 25 (variable speed means) equipped with a frequency / voltage converter (inverter) connected to a three-phase 200V commercial power source. The control unit 22 sends a signal to the variable speed means 25 based on the signals from the inflow pressure detector 21 and the discharge pressure detector 23 to control the rotation speed of the pump 13 to an arbitrary speed.
【０００５】特公平６−１２１１６５号公報、特公平５
−４１８４０５号公報、特開平５−１１８２８０号公報
等によれば、推定末端圧力一定制御の方法が開示されて
いる。推定末端圧力一定制御とは、上述した可変速給水
装置において、ポンプ吐出側の圧力をポンプ回転速度の
調整で制御することにより、流量の変動の如何に係わら
ず常に末端給水機器側における給水水圧を一定に制御し
ようとするものである。即ち、給水水量が大きい時には
管路抵抗を見込んで加圧ポンプの吐出圧力を末端で必要
とする圧力よりも高くすることにより末端での必要給水
水圧を確保する。給水がほとんど停止してポンプが締切
運転に近い状態では、加圧ポンプの吐出圧力を末端で必
要とする最低限の圧力に制御することにより、末端での
必要給水水圧を確保する。Japanese Patent Publication No. 6-112165, Japanese Patent Publication No. 5
-418405, Japanese Patent Laid-Open No. 5-118280, etc. disclose a method for controlling the estimated end pressure constant. With the estimated constant end pressure control, in the variable speed water supply system described above, the pressure on the pump discharge side is controlled by adjusting the pump rotation speed, so that the water supply pressure on the end water supply equipment side is always maintained regardless of fluctuations in the flow rate. It is intended to be controlled in a constant manner. That is, when the amount of supplied water is large, the discharge pressure of the pressurizing pump is set to be higher than the pressure required at the end in consideration of the resistance of the pipe line to secure the required supply water pressure at the end. When the water supply is almost stopped and the pump is close to the deadline operation, the discharge pressure of the pressurizing pump is controlled to the minimum pressure required at the terminal to secure the required water supply water pressure at the terminal.
【０００６】高価な流量計を用いることなく、推定末端
圧力一定制御を行う従来の可変速給水装置の一例を図４
に示す。給水ポンプ３と、該ポンプ３を駆動するインバ
ータとモータからなる可変速電動機２と、該可変速電動
機２の回転速度を検出して、該回転速度Ｈｚｘの信号を
出力する回転速度検出手段５と、給水ポンプ３の吐出管
８に設けられ該吐出管８の吐出水圧を検出して該吐出水
圧Ｐd の信号を出力する圧力検出手段９と、使用水量最
大時の必要吐出圧力ＰA を設定する圧力設定手段１０１
と、締切運転時の必要最低吐出圧力ＰB を設定する圧力
設定手段１０２と、ポンプ締切圧力Ｐ0 と回転速度Ｈｚ
の関係を設定するデータテーブル１０３と、目標圧力演
算手段６と、回転制御手段７を具備する構成である。FIG. 4 shows an example of a conventional variable speed water supply apparatus for performing constant estimated end pressure control without using an expensive flow meter.
Shown in. A water feed pump 3, a variable speed electric motor 2 comprising an inverter and a motor for driving the pump 3, and a rotational speed detecting means 5 for detecting the rotational speed of the variable speed electric motor 2 and outputting a signal of the rotational speed Hzx. , A pressure detecting means 9 provided in the discharge pipe 8 of the water supply pump 3 for detecting the discharge water pressure of the discharge pipe 8 and outputting a signal of the discharge water pressure Pd, and a pressure for setting the necessary discharge pressure PA at the maximum amount of water used. Setting means 101
And the pressure setting means 102 for setting the minimum required discharge pressure PB during the shutoff operation, the pump shutoff pressure P0 and the rotational speed Hz.
The data table 103 for setting the above relationship, the target pressure calculation means 6, and the rotation control means 7 are provided.
【０００７】上記構成の可変速給水装置において、目標
圧力演算手段６は回転速度Ｈｚｘに対応する目標吐出圧
力ＰV を、回転速度Ｈｚｘの関数（ＰV ＝ｆ（Ｈｚ
ｘ））により算出し、該目標吐出圧力ＰV と実際の吐出
圧力Ｐd とに応答して、該吐出圧力Ｐd が目標圧力ＰV
に一致するように、可変速電動機２を速度制御する。In the variable speed water supply system having the above structure, the target pressure calculating means 6 determines the target discharge pressure PV corresponding to the rotation speed Hzx as a function (PV = f (Hz) of the rotation speed Hzx.
x)), and the discharge pressure Pd is the target pressure PV in response to the target discharge pressure PV and the actual discharge pressure Pd.
The speed of the variable speed electric motor 2 is controlled so as to coincide with.
【０００８】しかしながら、上記構成の可変速給水装置
においては、給水ポンプ３の流入側（一次側）に受水槽
等を持つ流入圧力Ｐs があまり変化しない配管系では有
効である。しかし、配管途中に給水ポンプ３を直結して
加圧するような配管系、言い換えればポンプ一次側の圧
力が水の使用状態によって著しく変化するような配管系
ではポンプ二次側の圧力を末端圧力一定に制御すること
が困難であった。However, the variable speed water supply apparatus having the above-described structure is effective in a piping system having a water receiving tank or the like on the inflow side (primary side) of the water supply pump 3 and in which the inflow pressure Ps does not change much. However, in a piping system in which the water supply pump 3 is directly connected and pressurized in the middle of the piping, in other words, in a piping system in which the pressure on the primary side of the pump changes significantly depending on the usage state of water, the pressure on the secondary side of the pump is kept constant. It was difficult to control.
【０００９】係る問題点を回避するため、特開平５−１
１８２８０号公報に開示された発明によれば、水道の本
管である配水管に直結されるポンプ一次側（流入側）に
設けた圧力センサよりの流入水圧を検出し、この検出値
により逐一制御演算式を修正することにより、水の使用
状態によってポンプ一次側圧力が変化してもポンプ二次
側の圧力を末端圧力一定に制御することができる可変速
給水装置が開示されている。In order to avoid such a problem, Japanese Patent Laid-Open No. 5-1
According to the invention disclosed in Japanese Patent No. 18280, the inflow water pressure is detected from a pressure sensor provided on the primary side (inflow side) of the pump that is directly connected to the water distribution pipe, which is the main pipe of the water supply, and the detected value is used to control the temperature in steps. A variable speed water supply device is disclosed in which the pressure on the secondary side of the pump can be controlled to a constant end pressure even if the pressure on the primary side of the pump changes depending on the usage state of water by modifying the arithmetic expression.
【００１０】図５に示すように、給水ポンプ３に連結さ
れ、該ポンプ３を駆動する可変速電動機２と、可変速電
動機２の回転速度Ｈｚｘを検出する回転速度検出手段５
と、給水ポンプ３の吐出圧力Ｐd を検出する吐出圧力検
出手段９と、使用水量最大時の設定圧力ＰA を設定する
圧力設定手段１０１と、締切運転時の設定圧力ＰB を設
定する圧力設定手段１０２と、ポンプ締切圧力Ｐ0 と回
転速度Ｈｚとの関係を設定するデータテーブル１０３と
を備える。そして、回転速度Ｈｚｘに対応する目標圧力
ＰV を、回転速度信号Ｈｚｘの関数（ＰV ＝ｆ（Ｈｚ
ｘ））により算出する目標圧力演算手段６と、目標圧力
信号ＰV と吐出圧力Ｐd とに応答して、吐出圧力Ｐd が
目標圧力信号ＰV に一致するように、可変速度電動機２
を速度制御する回転速度制御手段７とを具備する。給水
ポンプ３の流入側に設けられ流入側の水圧Ｐs を検出す
る圧力制御手段９Ｘを設け、目標圧力演算手段６の目標
圧力ＰV 算出関数（ＰV ＝ｆ（Ｈｚｘ））を流入水圧Ｐ
s によって逐一変化させ、それによって得られた関数
（ＰV ＝ｆ′（Ｈｚｘ））によって、目標圧力ＰV に演
算するようにしたことを特徴とする。As shown in FIG. 5, a variable speed electric motor 2 which is connected to the water supply pump 3 and drives the pump 3, and a rotational speed detecting means 5 for detecting the rotational speed Hzx of the variable speed electric motor 2.
A discharge pressure detecting means 9 for detecting the discharge pressure Pd of the water supply pump 3, a pressure setting means 101 for setting a set pressure PA at the maximum amount of water used, and a pressure setting means 102 for setting a set pressure PB at the deadline operation. And a data table 103 for setting the relationship between the pump cutoff pressure P0 and the rotation speed Hz. Then, the target pressure PV corresponding to the rotation speed Hzx is a function (PV = f (Hz) of the rotation speed signal Hzx.
x)) in response to the target pressure calculating means 6 and the target pressure signal PV and the discharge pressure Pd so that the discharge pressure Pd matches the target pressure signal PV.
And a rotation speed control means 7 for controlling the speed. A pressure control means 9X provided on the inflow side of the water supply pump 3 for detecting the water pressure Ps on the inflow side is provided, and the target pressure PV calculation function (PV = f (Hzx)) of the target pressure calculation means 6 is set to the inflow water pressure P.
It is characterized in that the target pressure PV is calculated by the function (PV = f '(Hzx)) obtained by changing it by s.
【００１１】[0011]
【発明が解決しようとする課題】推定末端圧力一定制御
に用いる「ポンプ締切運転時の圧力とポンプ回転速度の
関係を記憶したデータテーブル」の圧力はポンプの実揚
程すなわち、流入側圧力がゼロにおけるポンプの吐出圧
力である必要がある。従来の受水槽がある場合には流入
側の圧力はゼロであり、ポンプの吐出圧力がそのままポ
ンプの特性となっていたため、現場に据付調整後の設定
運転モードで正しいデータテーブルを作成できた。しか
しながら、直結となりポンプ流入側に圧力がかかるた
め、従来の現場据付け時の設定運転モードではポンプの
特性に流入圧力が加えられた特性が取り込まれるため、
データテーブルを検索して得られた係数を用いて導かれ
る関数が正しくない。したがって、推定末端圧力一定制
御が正しくできない。また、現場で流入側の圧力をゼロ
にして設定運転することができないという不具合を生じ
ていた。The pressure in the "data table storing the relationship between the pressure during pump shutoff operation and the pump rotation speed" used for constant estimated end pressure control is at the actual pump head, that is, when the inlet pressure is zero. Must be the discharge pressure of the pump. When there was a conventional water receiving tank, the pressure on the inflow side was zero, and the discharge pressure of the pump was the characteristic of the pump as it was. Therefore, the correct data table could be created in the setting operation mode after installation and adjustment on site. However, since it is directly connected and pressure is applied to the inflow side of the pump, the characteristic that the inflow pressure is added to the characteristic of the pump is taken in in the conventional setting operation mode during field installation,
The function derived using the coefficient obtained by searching the data table is incorrect. Therefore, the estimated constant end pressure cannot be controlled correctly. In addition, there was a problem that the setting operation could not be performed at the site by setting the pressure on the inflow side to zero.
【００１２】本発明は、上述した事情に鑑みて為された
もので、直結型可変速給水装置において、ポンプの現場
据付け時の設定が容易であり、流入圧力が変動しても安
定な推定末端圧力一定制御動作を行うことができる可変
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, and in the direct-coupling type variable speed water supply apparatus, the setting at the time of on-site installation of the pump is easy, and the estimated end is stable even if the inflow pressure fluctuates. An object of the present invention is to provide a variable speed water supply device capable of performing a constant pressure control operation.
【００１３】[0013]
【課題を解決するための手段】本発明の可変速給水装置
は、水道の本管に接続され、ポンプ流入側の水圧を出力
する流入圧力検出器と、加圧ポンプと、この加圧ポンプ
の吐出側に連結した吐出管と、ポンプ吐出側の水圧を出
力する吐出圧力検出器と、このポンプに連結しこれを駆
動するモータと、モータを変速させる可変速手段とを設
け、推定末端圧力一定制御を行う可変速給水装置であっ
て、該給水装置は、推定末端圧力一定制御運転のために
参照するデータテーブルと、前記データテーブルを設置
現場のデータに書き換えることができる設定モードとを
備えたことを特徴とする。The variable speed water supply apparatus of the present invention is connected to a mains of water supply, an inflow pressure detector for outputting water pressure on the inflow side of the pump, a pressurizing pump, and this pressurizing pump. A discharge pipe connected to the discharge side, a discharge pressure detector that outputs water pressure on the pump discharge side, a motor that is connected to the pump and drives the pump, and a variable speed unit that shifts the motor are provided, and the estimated end pressure is constant. A variable speed water supply device for controlling, the water supply device comprising a data table to be referred to for a constant estimated end pressure control operation, and a setting mode in which the data table can be rewritten to the data of the installation site. It is characterized by
【００１４】[0014]
【作用】本発明によれば、現場据付け時の設定運転モー
ドにおいて、設置現場のデータを取り込むようにしてデ
ータテーブルを作成することから、流入側に圧力がかか
っていても正しいデータテーブルの作成が可能である。
そして、データテーブルの自動作成機能を備えたことか
ら、現場で据付調整時に流入側に圧力がかかっていても
容易にデータテーブルの作成ができる。それ故、現場で
据付調整後、自動設定モードでデータテーブルを作成す
ることにより、直ちに正しいデータを用いて推定末端圧
力一定制御が行える。According to the present invention, in the set operation mode at the time of site installation, since the data table is created by taking in the data of the installation site, the correct data table can be created even if pressure is applied to the inflow side. It is possible.
Since the data table automatic creation function is provided, the data table can be easily created even if pressure is applied to the inflow side during installation and adjustment at the site. Therefore, by creating a data table in the automatic setting mode after the installation and adjustment at the site, the estimated end pressure constant control can be immediately performed using correct data.
【００１５】[0015]
【実施例】以下、本発明の一実施例について添付図面を
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 the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts.
【００１６】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に配水管１１か
ら貯水槽を介することなく直結給水するシステム構成は
図１に示すとおりである。そして、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インバータ等の可変速手段
２５でポンプ回転速度を増減する吐出圧力制御が行われ
る。また、流入圧力が低下した場合に、配水管に悪影響
を及ぼさないように、一定の流入設定圧力以下にならな
いように、可変速手段２５でポンプ回転速度を減少す
る、又は停止する等の流入圧力制御が行われる。そし
て、吐出圧力制御は流入圧力Ｐs が選択設定圧力以下に
なった時に流入圧力制御に切り換えられる。Also in this embodiment, the system configuration in which the pressurizing pump 13 is directly connected to the water distribution pipe 11 and the terminal water supply device 17 is directly connected to the water distribution pipe 11 without using the water tank is as shown in FIG. Then, the pressurizing pump 13 controls the discharge pressure by the variable speed means 25 such as an inverter so as to increase or decrease the pump rotation speed so that the water supply pressure to the terminal water supply device 17 becomes constant by the signal of the discharge pressure detector 23. . Further, when the inflow pressure decreases, the variable speed means 25 reduces or stops the pump rotation speed so that the water distribution pipe is not adversely affected and the inflow pressure does not drop below a certain inflow set pressure. Control is performed. Then, the discharge pressure control is switched to the inflow pressure control when the inflow pressure Ps becomes equal to or lower than the selected set pressure.
【００１７】図２は、本発明の一実施例の可変速給水装
置の制御部分２２の推定末端圧力一定制御に関する構成
を示す。流入圧力検出器２１から加圧ポンプ１３の流入
側の圧力Ｐs が入力され、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。末端給水
機器の制御目標圧力は、通常１〜２ｋｇ／ｃｍ２ に設
定される。圧力設定手段１で設定される最大水量時の吐
出圧力ＰA は、末端給水機器に最大の水量を供給した時
に、管路抵抗による損失を見込んで設定した吐出圧力で
あり、通常ポンプの定格回転速度（東日本では５０Ｈ
ｚ、西日本では６０Ｈｚ）で想定した最大流量における
吐出圧力である。圧力設定手段２で設定される締切運転
時の吐出圧力ＰB は、ほとんど給水が無い締切状態では
管路抵抗による損失がほとんど無いため、末端給水機器
側で必要とされる最低圧力がそのままこの圧力となる。FIG. 2 shows a configuration related to the control of the estimated end pressure constant of the control portion 22 of the variable speed water supply system according to the embodiment of the present invention. The pressure Ps on the inflow side of the pressure pump 13 is input from the inflow pressure detector 21, and the pressure Pd on the discharge side of the pressure pump 13 is input from the discharge pressure detector 23. The control target pressure of the terminal water supply device is usually set to 1 to 2 kg / cm 2 . The discharge pressure PA at the maximum water amount set by the pressure setting means 1 is the discharge pressure set in consideration of the loss due to the line resistance when the maximum water amount is supplied to the terminal water supply device, and is usually the rated rotation speed of the pump. (50H in East Japan
z, 60 Hz in western Japan) is the discharge pressure at the maximum flow rate assumed. The discharge pressure PB set by the pressure setting means 2 during the shutoff operation has almost no loss due to the line resistance in the shutoff state where there is almost no water supply. Become.
【００１８】本実施例においては、最大流量時の設定吐
出圧力ＰA と締切運転時の設定吐出圧力ＰB が与えられ
ると、ポンプの回転速度Ｈｚｘに対応した目標吐出圧力
ＰV′の演算が可能である。この目標吐出圧力ＰV′ の
演算は、目標圧力演算手段６により行われ、ポンプの回
転速度Ｈｚと締切圧力Ｐとの関係を記憶したデータテー
ブル１０３を参照して行われる。目標吐出圧力ＰV′ が
求められると、回転速度制御手段７で実際の吐出圧力Ｐ
d と比較され、圧力ＰV′ と圧力Ｐd とが一致するよう
に可変速手段２５に速度を増速又は減速する指令が出さ
れる。尚、回転速度検出手段５は、可変速手段２５のイ
ンバータのＰＷＭ信号から、ポンプの回転速度Ｈｚｘを
算出する。In this embodiment, when the set discharge pressure PA at the maximum flow rate and the set discharge pressure PB at the dead cut operation are given, the target discharge pressure PV 'corresponding to the rotational speed Hzx of the pump can be calculated. . The calculation of the target discharge pressure PV 'is performed by the target pressure calculation means 6, and is performed by referring to the data table 103 that stores the relationship between the rotational speed Hz of the pump and the shutoff pressure P. When the target discharge pressure PV 'is obtained, the actual discharge pressure P is calculated by the rotation speed control means 7.
It is compared with d, and a command to increase or decrease the speed is issued to the variable speed means 25 so that the pressure PV 'matches the pressure Pd. The rotation speed detection means 5 calculates the rotation speed Hzx of the pump from the PWM signal of the inverter of the variable speed means 25.
【００１９】本実施例においては、吐出圧力Ｐd と流入
圧力Ｐs の差圧ΔＰを算定する差圧検出手段、ポンプの
回転速度を所定の間隔で徐々に上昇させる回転速度設定
手段、回転速度と差圧の関係を記憶部に書込む書込手段
等から構成される自動設定運転モード１０４を備える。In this embodiment, the differential pressure detecting means for calculating the differential pressure ΔP between the discharge pressure Pd and the inflow pressure Ps, the rotational speed setting means for gradually increasing the rotational speed of the pump at a predetermined interval, and the difference between the rotational speed and the rotational speed. An automatic setting operation mode 104 including a writing unit for writing the pressure relationship in the storage unit is provided.
【００２０】図３は、自動設定運転モードのフローを示
す。設置現場へポンプを据付け後、差圧ΔＰと回転速度
Ｈｚとのデータテーブルを作成する。このフローは、ま
ずポンプの回転速度Ｈｚをゼロに設定し、例えば０．２
５Ｈｚの所定間隔で徐々に上昇させる。そして、その回
転速度Ｈｚにおける流入圧力Ｐs 、吐出圧力Ｐd を読込
み、その差圧ΔＰを差圧検出手段により求めてＮＶＲＡ
Ｍ等で構成される記憶部（データテーブル１０３）に書
込む。この作業を回転速度が定格速度に達する迄繰返
す。FIG. 3 shows the flow of the automatic setting operation mode. After installing the pump at the installation site, create a data table of the differential pressure ΔP and the rotation speed Hz. In this flow, first, the rotational speed Hz of the pump is set to zero and, for example, 0.2
Gradually increase at a predetermined interval of 5 Hz. Then, the inflow pressure Ps and the discharge pressure Pd at the rotational speed Hz are read, and the differential pressure ΔP is obtained by the differential pressure detecting means and NVRA.
The data is written in the storage unit (data table 103) configured by M or the like. This operation is repeated until the rotation speed reaches the rated speed.
【００２１】目標圧力演算の手順は次の通りである。ま
ず、任意の回転速度Ｈｚｘに対する目標吐出圧力ＰV
は、流入圧力がゼロであるとすると、（１）式のように
なる。The procedure for calculating the target pressure is as follows. First, the target discharge pressure PV for an arbitrary rotation speed Hzx
When the inflow pressure is zero, Eq.
【数１】
但し、ＰA ： 定格運転（最大流量）時設定吐出圧力
（流入圧力はゼロ）
ＰB ： 締切運転（最低流量）時設定吐出圧力（流入
圧力はゼロ）
ＨｚO ： 定格運転時の回転速度
ＨｚB ： 締切運転時に対応する回転速度（流入圧力は
ゼロ）[Equation 1] However, PA: Set discharge pressure at rated operation (maximum flow rate) (inflow pressure is zero) PB: Set discharge pressure at deadline operation (minimum flow rate) (inflow pressure is zero) HzO: Rotation speed at rated operation HzB: Deadline operation Sometimes corresponding rotational speed (zero inflow pressure)
【００２２】ところで、データテーブル１０３には、任
意の回転速度Ｈｚに対する締切圧力Ｐの関係のデータが
記憶されている。これは、例えば東日本地区では０Ｈｚ
から５０Ｈｚ迄、例えば０．２５Ｈｚの間隔で、これら
の回転数に対応した締切圧力がＮＶＲＡＭ等の記憶装置
によって記憶されている。尚、式（１）においては、こ
の締切圧力は流入圧力がゼロであることを前提としてい
る。本実施例では設置現場での据付調整時に、各回転速
度に対応した吐出圧力Ｐd と流入圧力Ｐs の差圧ΔＰが
取り込まれる。この差圧ΔＰは、とりもなおさず、流入
圧力がゼロである場合の締切圧力に相当する。即ち、自
動設定運転モード１０４によれば、ポンプの設置現場へ
の据付け後に作成したデータテーブルが、必要な流入圧
力がゼロである場合の締切圧力となる。そして、与えら
れた締切時の目標吐出圧力ＰB から、流入圧力がゼロの
時の回転速度ＨｚB がデータテーブルから与えられる。By the way, the data table 103 stores data on the relation of the shutoff pressure P with respect to an arbitrary rotation speed Hz. This is, for example, 0 Hz in East Japan
To 50 Hz, for example, at intervals of 0.25 Hz, the shutoff pressures corresponding to these rotation speeds are stored in a storage device such as NVRAM. In the formula (1), it is premised that the shutoff pressure is zero inflow pressure. In this embodiment, the differential pressure ΔP between the discharge pressure Pd and the inflow pressure Ps corresponding to each rotation speed is taken in during the installation adjustment at the installation site. This pressure difference ΔP corresponds to the dead pressure when the inflow pressure is zero. That is, according to the automatic setting operation mode 104, the data table created after the pump is installed at the installation site becomes the dead pressure when the required inflow pressure is zero. Then, from the given target discharge pressure PB at the deadline, the rotational speed HzB when the inflow pressure is zero is given from the data table.
【００２３】流入圧力Ｐs が存在する時には、任意の回
転速度Ｈｚｘに対応した目標吐出圧力ＰV′ は、（２）
（３）（４）式に示す補正演算が行われる。When the inflow pressure Ps exists, the target discharge pressure PV 'corresponding to the arbitrary rotation speed Hzx is (2)
The correction calculation shown in equations (3) and (4) is performed.
【００２４】[0024]
【数２】 [Equation 2]
【００２５】従って目標圧力演算手段６から出力された
補正された目標圧力ＰV′と実際の吐出圧力Ｐd とが回
転速度制御手段７で比較される。比較の結果、吐出圧力
が目標圧力に近づくように回転速度が増減され、吐出圧
力が末端圧力を一定とするような目標圧力に調整され
る。Therefore, the corrected target pressure PV 'output from the target pressure calculation means 6 and the actual discharge pressure Pd are compared by the rotation speed control means 7. As a result of the comparison, the rotation speed is increased or decreased so that the discharge pressure approaches the target pressure, and the discharge pressure is adjusted to the target pressure that keeps the end pressure constant.
【００２６】尚、上述したデータテーブル１０３は、回
転速度Ｈｚと締切圧力の差圧ΔＰとの実測データを収納
したテーブルであるが、必ずしもテーブルである必要は
無く、関数を用いてもよいのは勿論のことである。The above-mentioned data table 103 is a table that stores measured data of the rotational speed Hz and the differential pressure ΔP of the shutoff pressure, but it is not necessarily a table and a function may be used. Of course.
【００２７】又、推定末端圧力一定制御の目標圧力演算
手段についても、一例を述べたのにすぎないもので、各
種の変形演算式が利用可能であるのも勿論のことであ
る。The target pressure calculating means for constant control of the estimated end pressure is merely an example, and it is needless to say that various modified calculating expressions can be used.
【００２８】[0028]
【発明の効果】以上に説明したように本発明によれば、
末端圧力一定制御方式の可変速給水装置で、設置現場の
データを自動設定運転モードで取込むようにしたもので
ある。従って、ポンプ据付後に、自動設定運転モードで
目標吐出圧力演算に必要な正しいデータテーブルを作成
することができる。それ故、可変速給水装置において、
末端圧力一定制御を設置現場で容易に、且つ正確に行う
ことが可能となる。As described above, according to the present invention,
This is a variable speed water supply system with a constant end pressure control system, which is designed to capture data at the installation site in an automatic setting operation mode. Therefore, after installing the pump, it is possible to create a correct data table necessary for calculating the target discharge pressure in the automatic setting operation mode. Therefore, in the variable speed water supply device,
It is possible to easily and accurately perform constant end pressure control at the installation site.
【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制御系の説明図。FIG. 2 is an explanatory diagram of a control system according to an embodiment of the present invention.
【図３】自動設定運転モードのフロー図。FIG. 3 is a flowchart of an automatic setting operation mode.
【図４】従来の末端圧力一定制御のシステム構成の説明
図。FIG. 4 is an explanatory diagram of a conventional system configuration for constant end pressure control.
【図５】従来の末端圧力一定制御のシステム構成の説明
図。FIG. 5 is an explanatory diagram of a conventional system configuration for constant end pressure control.
【符号の説明】 ５ 回転速度検出手段 ６ 目標圧力演算手段 ７ 回転速度制御手段 ３，１３ ポンプ ２１，２３ 圧力検出器 ２５ 可変速手段 １０１ 圧力（ＰA ）設定手段 １０２ 圧力（ＰB ）設定手段 １０３ データテーブル １０４ 自動設定運転モード Ｐs 流入側圧力 Ｐd 吐出側圧力[Explanation of symbols] 5 Rotational speed detection means 6 Target pressure calculation means 7 Rotation speed control means 3,13 pump 21,23 Pressure detector 25 Variable speed means 101 Pressure (PA) setting means 102 Pressure (PB) setting means 103 data table 104 Automatic setting operation mode Ps Inflow side pressure Pd Discharge side pressure
Claims (3)
水圧を出力する流入圧力検出器と、加圧ポンプと、この
加圧ポンプの吐出側に連結した吐出管と、ポンプ吐出側
の水圧を出力する吐出圧力検出器と、このポンプに連結
しこれを駆動するモータと、モータを変速させる可変速
手段とを設け、推定末端圧力一定制御を行う可変速給水
装置であって、 該給水装置は、推定末端圧力一定制御運転のために参照
するデータテーブルと、前記データテーブルを設置現場
のデータに書き換えることができる設定モードとを備え
たことを特徴とする可変速給水装置。1. An inflow pressure detector connected to a mains of water supply for outputting water pressure on a pump inflow side, a pressurizing pump, a discharge pipe connected to a discharge side of the pressurizing pump, and a pump discharge side. A variable speed water supply apparatus for performing constant estimated end pressure control, comprising a discharge pressure detector for outputting water pressure, a motor connected to this pump for driving the pump, and a variable speed means for changing the speed of the motor. A variable speed water supply device, wherein the device is provided with a data table referred to for a constant estimated end pressure control operation, and a setting mode in which the data table can be rewritten with data at the installation site.
時の吐出圧力と流入圧力との差圧と、ポンプの回転速度
とを対応させたものであることを特徴とする請求項１記
載の可変速給水装置。2. The variable speed according to claim 1, wherein the data table is a table in which a differential pressure between a discharge pressure and an inflow pressure during pump shutoff operation is associated with a rotational speed of the pump. Water supply device.
度を所定の間隔で上昇させて該回転速度に対応した該ポ
ンプ締切運転時の前記差圧をデータテーブルに書込む手
段を含むことを特徴とする請求項２記載の可変速給水装
置。3. The setting mode includes means for increasing the rotational speed of the pump at a predetermined interval and writing the differential pressure corresponding to the rotational speed during the pump cutoff operation in a data table. The variable speed water supply device according to claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002305837A JP3720011B2 (en) | 2002-10-21 | 2002-10-21 | Variable speed water supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002305837A JP3720011B2 (en) | 2002-10-21 | 2002-10-21 | Variable speed water supply device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15723095A Division JP3411128B2 (en) | 1995-05-31 | 1995-05-31 | Variable speed water supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003120580A true JP2003120580A (en) | 2003-04-23 |
| JP3720011B2 JP3720011B2 (en) | 2005-11-24 |
Family
ID=19197413
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002305837A Expired - Lifetime JP3720011B2 (en) | 2002-10-21 | 2002-10-21 | Variable speed water supply device |
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| Country | Link |
|---|---|
| JP (1) | JP3720011B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011185190A (en) * | 2010-03-10 | 2011-09-22 | Ebara Corp | Control device integrated type motor pump |
| CN102713300A (en) * | 2009-11-25 | 2012-10-03 | 威乐水泵有限公司 | Automatic pump and an operation control method for the same |
| JP2013204939A (en) * | 2012-03-28 | 2013-10-07 | Miura Co Ltd | Boiler system |
| JP2013219969A (en) * | 2012-04-11 | 2013-10-24 | Daikin Ind Ltd | Rotational speed detection device and compressor control device |
-
2002
- 2002-10-21 JP JP2002305837A patent/JP3720011B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102713300A (en) * | 2009-11-25 | 2012-10-03 | 威乐水泵有限公司 | Automatic pump and an operation control method for the same |
| KR101206695B1 (en) * | 2009-11-25 | 2012-11-29 | 윌로펌프 주식회사 | Automatic pump and operation control mehtod of the same |
| EP2505844A4 (en) * | 2009-11-25 | 2017-05-03 | Wilo Pumps Ltd | Automatic pump and an operation control method for the same |
| JP2011185190A (en) * | 2010-03-10 | 2011-09-22 | Ebara Corp | Control device integrated type motor pump |
| JP2013204939A (en) * | 2012-03-28 | 2013-10-07 | Miura Co Ltd | Boiler system |
| JP2013219969A (en) * | 2012-04-11 | 2013-10-24 | Daikin Ind Ltd | Rotational speed detection device and compressor control device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3720011B2 (en) | 2005-11-24 |
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