JP6492203B1 - Water supply apparatus and control method of water supply apparatus - Google Patents
Water supply apparatus and control method of water supply apparatus Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 285
- 238000000034 method Methods 0.000 title claims description 21
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 230000004913 activation Effects 0.000 claims description 11
- 230000010354 integration Effects 0.000 claims 2
- 238000001994 activation Methods 0.000 description 10
- 238000004364 calculation method Methods 0.000 description 3
- 230000001186 cumulative effect Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
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Abstract
【課題】複数台のポンプの各部品の消耗度を平準化する給水装置を提供する。
【解決手段】給水装置１０は、複数台のポンプ３０と、各ポンプ３０の給水量を検出する流量センサ５０と、吐出し圧力を検出する圧力センサ９０と、各流量センサ５０と圧力センサ９０の検出情報に基づいてポンプ３０を制御する制御部１１２とを備えている。制御部１１２は、通常時は、ロータリー運転によって、吐出し圧力が起動圧力を下回る都度、ポンプ３０を順次起動し、運転中のポンプ３０の給水量が停止流量を下回った場合、運転中のポンプ３０を停止する。制御部１１２は、積算給水量が最も多いポンプ３０の積算給水量に対する積算給水量が最も少ないポンプ３０の積算給水量の比率が設定値を下回った場合、積算給水量が最も少ないポンプ３０を優先的に起動し、優先的に起動したポンプ３０の積算給水量比が１００％に到達した場合に、通常時のロータリー運転に復帰する。
【選択図】図１The present invention provides a water supply apparatus which equalizes the degree of wear of each part of a plurality of pumps.
A water supply device includes a plurality of pumps, a flow rate sensor detecting a water supply amount of each pump, a pressure sensor detecting a discharge pressure, a flow rate sensor and a pressure sensor. And a control unit 112 which controls the pump 30 based on the detection information. During normal operation, the control unit 112 sequentially starts the pump 30 every time the discharge pressure falls below the start pressure by rotary operation, and when the water supply amount of the pump 30 in operation falls below the stop flow rate, the pump in operation Stop 30. When the ratio of the integrated water supply amount of the pump 30 with the smallest integrated water supply amount to the integrated water supply amount of the pump 30 with the largest integrated water supply amount falls below the set value, the control unit 112 gives priority to the pump 30 with the smallest integrated water supply amount. When the integrated water supply amount ratio of the pump 30, which has been activated and has been activated preferentially, reaches 100%, it returns to the normal rotary operation.
[Selected figure] Figure 1
Description
本発明は、複数台のポンプを備えた給水装置に関する。 The present invention relates to a water supply apparatus provided with a plurality of pumps.
複数台のポンプを備えた給水装置では、複数台のポンプを順次起動するロータリー運転を実施することによって、複数台のポンプの起動回数を同じにし、ポンプの各部品の消耗度の平準化を図ることが行なわれている。 In a water supply system equipped with a plurality of pumps, the number of activations of the plurality of pumps can be made the same by carrying out a rotary operation to sequentially activate the plurality of pumps, and equalization of the degree of consumption of each part of the pumps is achieved. The thing is being done.
しかし、給水需要の多い時間帯にいずれかのポンプの運転が継続して、運転時間に偏りが出るとこともある。この場合、複数台のポンプの各部品の消耗度は平準化されない。 However, the operation of one of the pumps may continue during the time when demand for water supply is high, and the operation time may be biased. In this case, the degree of wear of each part of the plurality of pumps is not leveled.
特開２０００−４５９８２号公報は、複数台のポンプの運転時間を均一化する制御方法を開示している。この制御方法は、複数の可変速ポンプを備えた給水装置において、全てのポンプを停止した時に、先発ポンプをポンプ号機順にローテーションさせるが、それまで先発していたポンプの積算運転時間が、ポンプ各号の積算運転時間の平均値に対して、１以下の一定割合を掛けた値より少ない場合に、次回起動の時にローテーションを行なわないで、もう一度そのポンプを先発させる、というものである。 Japanese Patent Laid-Open No. 2000-45982 discloses a control method for equalizing the operation time of a plurality of pumps. According to this control method, in the water supply apparatus provided with a plurality of variable speed pumps, when all the pumps are stopped, the first pump is rotated in the order of the pump number, but the cumulative operating time of the pump previously started When the average value of the cumulative operation time of the No. 1 is smaller than a value multiplied by a fixed ratio of 1 or less, the pump is pre-restarted again without performing rotation at the next activation.
しかし、代表的な消耗部品であるモータの軸受の疲労は、フレーム温度と回転速度の積算値に依存すると考えられる。このため、インバータによってモータの回転速度を制御している場合、給水量によって回転速度が異なり、同じ運転時間でも、回転速度の積算値、ひいては軸受の寿命が異なってくる。 However, fatigue of the bearing of the motor which is a typical consumable part is considered to depend on the integrated value of the frame temperature and the rotational speed. For this reason, when the rotational speed of the motor is controlled by the inverter, the rotational speed differs depending on the amount of water supplied, and the integrated value of the rotational speed and hence the life of the bearing differ even for the same operation time.
同様に、消耗部品であるメカニカルシールの回転環の摩耗も、回転速度の積算値に依存すると考えられる。このため、積算運転時間を平準化しても、各ポンプのメカニカルシールの摩耗度合いを同等にすることはできない。 Similarly, the wear of the rotary ring of the mechanical seal, which is a consumable part, is considered to depend on the integrated value of the rotational speed. Therefore, even if the integrated operation time is equalized, the degree of wear of the mechanical seal of each pump can not be made equal.
一方、モータコイルの絶縁劣化は、湿度及び、通電電流の積算値との相関があると考えられる。また、ポンプのインペラの摩耗は、通過する水流の流速と相関があると考えられる。 On the other hand, insulation deterioration of the motor coil is considered to have a correlation with the integrated value of the humidity and the supplied current. It is also believed that the wear of the pump impeller is correlated with the flow rate of the passing water flow.
従って、単に積算運転時間を平準化するだけでは、給水装置の複数台のポンプの各部品の消耗度を平準化することは難しい。 Therefore, it is difficult to equalize the degree of wear of each part of the plurality of pumps of the water supply system simply by equalizing the integrated operation time.
本発明は、このような実状を考慮して成されたものであり、その目的は、複数台のポンプの各部品の消耗度を平準化する給水装置および制御方法を提供することである。 The present invention has been made in consideration of such circumstances, and an object thereof is to provide a water supply apparatus and control method which equalize the degree of wear of each part of a plurality of pumps.
本発明による給水装置は、送水する複数台のポンプと、各ポンプの給水量を検出する流量センサと、複数台のポンプによって供給される水の吐出し圧力を検出する圧力センサと、各流量センサと圧力センサの検出情報に基づいて複数台のポンプを制御する制御部とを備えている。制御部は、通常時は、ロータリー運転によって、圧力センサによって検出される吐出し圧力が起動圧力を下回る都度、複数台のポンプを順次起動し、流量センサによって検出される運転中のポンプの給水量が停止流量を下回った場合には、運転中のポンプを停止する。制御部はまた、積算給水量が最も多いポンプの積算給水量に対する積算給水量が最も少ないポンプの積算給水量の比率である積算給水量比が、あらかじめ定めた第１の設定値を下回った場合、積算給水量が最も少ないポンプを優先的に起動し、優先的に起動したポンプの積算給水量比が１００％に到達した場合に、通常時のロータリー運転に復帰する。 The water supply apparatus according to the present invention comprises a plurality of pumps for supplying water, a flow rate sensor for detecting the amount of water supplied by each pump, a pressure sensor for detecting the discharge pressure of water supplied by the plurality of pumps, and each flow rate sensor And a control unit that controls a plurality of pumps based on detection information of the pressure sensor. The control unit normally starts a plurality of pumps sequentially each time the discharge pressure detected by the pressure sensor falls below the start pressure by rotary operation, and the water supply amount of the running pump detected by the flow rate sensor Stops the pump during operation if the flow rate falls below the stop flow rate. The control unit also determines that the integrated water supply ratio, which is the ratio of the integrated water supply amount of the pump with the smallest integrated water supply amount to the integrated water supply amount of the pump with the largest integrated water supply amount, falls below a first predetermined value set in advance. The pump having the smallest accumulated water supply amount is preferentially started, and when the accumulated water supply amount ratio of the preferentially activated pump reaches 100%, the normal rotary operation is resumed.
本発明による制御方法は、複数台のポンプを備えた給水装置の制御方法である。制御方法は、通常時は、ロータリー運転によって、吐出し圧力が起動圧力を下回る都度、前記複数台のポンプを順次起動し、運転中のポンプの給水量が停止流量を下回った場合には、運転中のポンプを停止する。制御方法はまた、積算給水量が最も多いポンプの積算給水量に対する積算給水量が最も少ないポンプの積算給水量の比率である積算給水量比が、あらかじめ定めた第１の設定値を下回った場合、積算給水量が最も少ないポンプを優先的に起動し、優先的に起動したポンプの積算給水量比が１００％に到達した場合に、通常時のロータリー運転に復帰する。 The control method according to the present invention is a control method of a water supply apparatus provided with a plurality of pumps. In the control method, normally, each time the discharge pressure falls below the start pressure by rotary operation, the plurality of pumps are sequentially started, and when the amount of water supplied by the running pump falls below the stop flow rate, the operation is performed. Stop the pump inside. The control method is also such that the integrated water supply amount ratio, which is the ratio of the integrated water supply amount of the pump with the smallest integrated water supply amount to the integrated water supply amount of the pump with the largest integrated water supply amount, falls below a first predetermined value set in advance The pump having the smallest accumulated water supply amount is preferentially started, and when the accumulated water supply amount ratio of the preferentially activated pump reaches 100%, the normal rotary operation is resumed.
本発明によれば、複数台のポンプの各部品の消耗度を平準化する給水装置および制御方法を提供する。 According to the present invention, a water supply apparatus and control method are provided to equalize the degree of wear of each part of a plurality of pumps.
以下、図面を参照しながら、複数台のポンプを備えた給水装置の一実施形態について説明する。ここでは、３台のポンプを備えた給水装置を例にあげて説明する。３台のポンプは単なる例示であり、給水装置が備えるポンプの台数は３台に限定されるものではない。 Hereinafter, an embodiment of a water supply apparatus provided with a plurality of pumps will be described with reference to the drawings. Here, a water supply apparatus including three pumps will be described as an example. The three pumps are merely examples, and the number of pumps provided in the water supply apparatus is not limited to three.
〔装置構成〕
図１は、本実施形態に係る給水装置１０の正面図であり、図２は、図１に示された給水装置１０の上面図であり、図３は、図１と図２に示された給水装置１０の側面図である。
〔Device configuration〕
FIG. 1 is a front view of a water supply apparatus 10 according to the present embodiment, FIG. 2 is a top view of the water supply apparatus 10 shown in FIG. 1, and FIG. 3 is shown in FIGS. FIG. 2 is a side view of the water supply device 10;
図１〜図３に示されるように、給水装置１０は、送水する３台のポンプ３０と、各ポンプ３０の給水量を検出する流量センサ５０と、３台のポンプ３０によって供給される水の吐出し圧力を検出する圧力センサ９０と、３台のポンプ３０を制御する制御盤１１０とを備えている。 As shown in FIGS. 1 to 3, the water supply apparatus 10 includes three pumps 30 for supplying water, a flow rate sensor 50 for detecting the amount of water supplied from each pump 30, and water supplied by the three pumps 30. A pressure sensor 90 for detecting the discharge pressure and a control panel 110 for controlling the three pumps 30 are provided.
３台のポンプ３０はベース２０上に固定されている。各ポンプ３０は、例えばタービンポンプで構成されている。各ポンプ３０は、インペラを回転させるモータ３２を有している。モータ３２のケーブルは制御盤１１０に接続されている。各ポンプ３０の吸込口３４は、例えば受水槽に接続される。これに限らず、各ポンプ３０の吸込口３４は、配水管に接続されてもよい。各ポンプ３０の吐出し口は、連結管４０を介して、各ポンプ３０から供給される水を合流させる合流管８０に接続されている。 Three pumps 30 are fixed on the base 20. Each pump 30 is configured by, for example, a turbine pump. Each pump 30 has a motor 32 for rotating an impeller. The cable of the motor 32 is connected to the control board 110. The suction port 34 of each pump 30 is connected to a water receiving tank, for example. Not only this but the suction port 34 of each pump 30 may be connected to a water pipe. The discharge port of each pump 30 is connected to the junction pipe 80 which joins the water supplied from each pump 30 via the connection pipe 40.
連結管４０には、ポンプ３０の側から順に、流量センサ５０と逆止弁６０とボール弁７０が設けられている。 A flow rate sensor 50, a check valve 60, and a ball valve 70 are provided in the connection pipe 40 sequentially from the pump 30 side.
流量センサ５０は、例えば、羽根車式の流量センサで構成されている。羽根車式の流量センサ５０は、羽根車に取り付けられた磁石の回転を検出することによって、各ポンプ３０の給水量をパルス数として検出する。流量センサ５０の信号線は制御盤１１０に接続されており、流量センサ５０は検出情報を制御盤１１０へ供給する。 The flow rate sensor 50 is, for example, an impeller type flow rate sensor. The impeller type flow rate sensor 50 detects the amount of water supplied to each pump 30 as the number of pulses by detecting the rotation of a magnet attached to the impeller. A signal line of the flow rate sensor 50 is connected to the control board 110, and the flow rate sensor 50 supplies detection information to the control board 110.
合流管８０には、圧力センサ９０が設けられている。圧力センサ９０の信号線は制御盤１１０に接続されており、圧力センサ９０は検出情報を制御盤１１０へ供給する。合流管８０にはまた、アキュムレータ１００が接続されている。合流管８０の吐出し口８６は、蛇口等の給水用具に接続される。 The merging pipe 80 is provided with a pressure sensor 90. The signal line of the pressure sensor 90 is connected to the control board 110, and the pressure sensor 90 supplies detection information to the control board 110. An accumulator 100 is also connected to the junction pipe 80. The discharge port 86 of the merging pipe 80 is connected to a water supply tool such as a faucet.
制御盤１１０は、架台１２０によってベース２０に固定されている。制御盤１１０は、各流量センサ５０と圧力センサ９０の検出情報に基づいて３台のポンプ３０を制御する制御部１１２を備えている。 The control panel 110 is fixed to the base 20 by a mount 120. The control panel 110 includes a control unit 112 that controls the three pumps 30 based on detection information of the flow rate sensors 50 and the pressure sensor 90.
制御部１１２は、例えば、マイコン基板によって構成される。つまり、制御部１１２は、予めプログラムされたソフトウェアに従って動作するプロセッサと、ソフトウェアや必要な情報を記憶しておく記憶素子とを含んでいる。あるいは、制御部１１２は、専用の回路や複数の汎用の回路を組み合わせて構成されてもよい。 The control unit 112 is configured by, for example, a microcomputer substrate. That is, the control unit 112 includes a processor that operates according to pre-programmed software, and a storage element that stores software and necessary information. Alternatively, the control unit 112 may be configured by combining a dedicated circuit or a plurality of general-purpose circuits.
制御部１１２は、各ポンプ３０のモータ３２の回転速度を制御するインバータ１１４を備えている。制御部１１２は、各ポンプ３０の積算給水量を算出する機能を有している。積算給水量は、流量センサ５０によって検出される各ポンプ３０の給水量を時間積分することによって算出される。制御部１１２はまた、算出した各ポンプ３０の積算給水量を記憶しておく記憶素子１１６を備えている。 The control unit 112 includes an inverter 114 that controls the rotational speed of the motor 32 of each pump 30. The control unit 112 has a function of calculating the integrated water supply amount of each pump 30. The accumulated water supply amount is calculated by time-integrating the water supply amount of each pump 30 detected by the flow rate sensor 50. The control unit 112 also includes a storage element 116 that stores the calculated integrated water supply amount of each pump 30.
インバータ１１４は、吐出し圧力が目標圧力になるように、各ポンプ３０のモータ３２への出力周波数を制御して、各ポンプ３０のモータ３２の回転速度を制御する。 The inverter 114 controls the rotational frequency of the motor 32 of each pump 30 by controlling the output frequency to the motor 32 of each pump 30 so that the discharge pressure becomes the target pressure.
〔ポンプの各部品の消耗度の平準化〕
ポンプ３０のモータ３２の軸受の疲労やメカニカルシールの回転環の摩耗を平均化するには、回転速度の積算値を平準化すべきである。モータコイルの絶縁劣化を平均化するには、通電電流の積算値を平準化すべきである。ポンプ３０のインペラの摩耗を平均化するには、積算給水量を平準化すべきである。
[Leveling the degree of wear of each part of the pump]
In order to average the fatigue of the bearing of the motor 32 of the pump 30 and the wear of the rotary ring of the mechanical seal, the integrated value of the rotational speed should be leveled. In order to average the insulation deterioration of the motor coil, the integrated value of the conduction current should be equalized. In order to average out the wear of the impeller of the pump 30, the accumulated water supply amount should be equalized.
しかし、このように３種類の積算値を平準化することは非常に困難であり、アルゴリズムも複雑となってしまう。 However, it is very difficult to equalize the three types of integrated values in this manner, and the algorithm becomes complicated.
タービンポンプは、給水量が多くなるほど、モータ電流値が高くなり、モータフレームの温度も高くなっていくため、積算電流値の代わりに積算給水量を平準化しても問題ない。インバータ１１４によって吐出し圧力一定制御を行なっている場合、給水量が少ないと回転速度は低く、定格給水量以上では一定の最高回転速度となるため、回転速度の積算値の代わりに、積算給水量を平準化しても問題ない。 As the amount of water supplied to the turbine pump increases, the motor current value increases and the temperature of the motor frame also increases. Therefore, there is no problem in leveling the integrated water supply amount instead of the integrated current value. When the discharge pressure constant control is performed by the inverter 114, the rotation speed is low when the water supply amount is small, and the constant maximum rotation speed is obtained above the rated water supply amount. Therefore, the integrated water supply amount is used instead of the integrated value of the rotation speed. There is no problem in leveling the
従って、積算給水量を平準化することによって、モータ電流値、回転速度の積算値も同等レベルとなる。 Therefore, by equalizing the integrated water supply amount, the integrated values of the motor current value and the rotational speed also become equivalent levels.
〔ロータリー運転における制御〕
次に、制御部１１２によるポンプ３０の起動と停止の制御について説明する。制御部１１２による制御は、３台のポンプ３０の積算給水量を平準化する制御である。ここで、便宜上、積算給水量が最も多いポンプ３０を最多積算給水量ポンプ３０ｍと称し、積算給水量が最も少ないポンプ３０を最少積算給水量ポンプ３０ｓと称する。また、最多積算給水量ポンプ３０ｍの積算給水量Ｑｍに対する最少積算給水量ポンプ３０ｓの積算給水量Ｑｓの比率を、積算給水量比Ｒ（＝Ｑｓ／Ｑｍ）と称する。さらに、積算給水量比Ｒが、あらかじめ定めた設定値Ｒ１（例えば９０％）を下回っていない場合を通常時とし、積算給水量比Ｒが、あらかじめ定めた設定値Ｒ１を下回っている場合を非通常時とする。
[Control in rotary operation]
Next, control of start and stop of the pump 30 by the control unit 112 will be described. The control by the control unit 112 is control to equalize the integrated water supply amount of the three pumps 30. Here, for convenience, the pump 30 with the largest accumulated water supply amount is referred to as the largest accumulated water supply amount pump 30 m, and the pump 30 with the smallest accumulated water supply amount is referred to as the minimum accumulated water supply amount pump 30 s. Further, the ratio of the integrated water supply amount Qs of the minimum integrated water supply amount pump 30s to the integrated water supply amount Qm of the largest integrated water supply amount pump 30m is referred to as an integrated water supply amount ratio R (= Qs / Qm). Furthermore, assuming that the integrated water supply amount ratio R does not fall below a predetermined set value R1 (for example, 90%) is a normal time, and the case where the integrated water supply amount ratio R is lower than a predetermined set value R1 is not Normal time.
図４は、制御部１１２によるポンプ３０の起動と停止の制御の一例を示す流れ図である。ここでは、制御部１１２は、３台のポンプ３０のうち、少なくとも２台のポンプ３０を並列運転するように構成されている。制御部１１２は、例えば３台のポンプ３０を並列運転するように構成されている。以下、図４を参照しつつ、ロータリー運転における制御部１１２によるポンプ３０の起動と停止の制御について説明する。 FIG. 4 is a flowchart showing an example of control of start and stop of the pump 30 by the control unit 112. Here, the control unit 112 is configured to operate at least two of the three pumps 30 in parallel. The control unit 112 is configured to operate, for example, three pumps 30 in parallel. Hereinafter, control of start and stop of the pump 30 by the control unit 112 in the rotary operation will be described with reference to FIG. 4.
制御部１１２は、通常時は、ステップＳ１１において、ロータリー運転によって、次のように、ポンプ３０の起動と停止を制御する。制御部１１２は、３台のポンプ３０の停止時に、圧力センサ９０によって検出される吐出し圧力が起動圧力を下回る都度、３台のポンプ３０を順次起動する。また、制御部１１２は、１台のポンプ３０の運転中に、流量センサ５０によって検出される運転中のポンプ３０の給水量が停止流量Ｑ０（例えば１０Ｌ／ｍｉｎ）を下回った場合には、運転中のポンプ３０を停止する。 At a normal time, in step S11, the control unit 112 controls start and stop of the pump 30 by rotary operation as follows. When the three pumps 30 stop, the control unit 112 sequentially starts the three pumps 30 each time the discharge pressure detected by the pressure sensor 90 falls below the start pressure. In addition, when the water supply amount of the pump 30 in operation detected by the flow rate sensor 50 falls below the stop flow rate Q0 (for example, 10 L / min) during operation of one pump 30, the control unit 112 operates Stop the pump 30 inside.
詳しくは、例えば、次のようになる。ここでは、便宜上、３台のポンプ３０を、第１のポンプ３０、第２のポンプ３０、第３のポンプ３０と称する。まず、吐出し圧力が起動圧力を下回ったならば、第１のポンプ３０を起動する。第１のポンプ３０の運転中に、給水量が停止流量Ｑ０を下回ったならば、第１のポンプ３０を停止する。次に、吐出し圧力が起動圧力を下回ったならば、第２のポンプ３０を起動する。第２のポンプ３０の運転中に、給水量が停止流量Ｑ０を下回ったならば、第２のポンプ３０を停止する。 Specifically, for example, it is as follows. Here, for convenience, the three pumps 30 are referred to as a first pump 30, a second pump 30, and a third pump 30, respectively. First, when the discharge pressure falls below the start pressure, the first pump 30 is started. If the amount of supplied water falls below the stop flow rate Q0 during operation of the first pump 30, the first pump 30 is stopped. Next, when the discharge pressure falls below the start pressure, the second pump 30 is started. If the amount of supplied water falls below the stop flow rate Q0 during operation of the second pump 30, the second pump 30 is stopped.
その次は、第３のポンプ３０の起動と停止を行なう。それ以降は、第１のポンプ３０の起動と停止、第２のポンプ３０の起動と停止、第３のポンプ３０の起動と停止といった具合に、ポンプ３０の起動と停止を繰り返す。 Then, the third pump 30 is started and stopped. After that, the start and stop of the pump 30 are repeated in the order of start and stop of the first pump 30, start and stop of the second pump 30, and start and stop of the third pump 30.
また、圧力センサ９０によって検出される吐出し圧力に基づいて運転中のポンプ３０のモータ３２の回転速度が最高回転速度に到達したと判断する都度、ポンプ３０を追加起動して複数台のポンプ３０を並列運転する。また、流量センサ５０によって検出される運転中のポンプ３０の給水量が、あらかじめ定めた複数の減台流量を下回る都度、運転中の複数台のポンプ３０のうちの１台を停止する。 Further, each time it is determined that the rotational speed of the motor 32 of the operating pump 30 has reached the maximum rotational speed based on the discharge pressure detected by the pressure sensor 90, the pump 30 is additionally started to operate the plurality of pumps 30. Operate in parallel. Moreover, whenever the water supply amount of the pump 30 in operation detected by the flow rate sensor 50 falls below the predetermined flow rate of a plurality of stages, one of the plurality of pumps 30 in operation is stopped.
詳しくは、例えば、次のようになる。まず、１台のポンプ３０の運転中に、圧力センサ９０によって検出される吐出し圧力に基づいてモータ３２の回転速度が最高回転速度に到達したと判断したならば、別の１台のポンプ３０を追加起動して２台のポンプ３０を並列運転する。２台のポンプ３０の運転中に、圧力センサ９０によって検出される吐出し圧力に基づいて２台のモータ３２の回転速度がともに最高回転速度に到達したと判断したならば、残りの１台のポンプ３０を追加起動して３台のポンプ３０を並列運転する。また、２台のポンプ３０の運転中に、各流量センサ５０によって検出される給水量の合計が第１の減台流量を下回ったならば、運転中の２台のポンプ３０の一方を停止する。３台のポンプ３０の運転中に、各流量センサ５０によって検出される給水量の合計が第２の減台流量を下回ったならば、運転中の３台のポンプ３０のうちの１台を停止する。 Specifically, for example, it is as follows. First, if it is determined that the rotational speed of the motor 32 has reached the maximum rotational speed based on the discharge pressure detected by the pressure sensor 90 during the operation of one pump 30, another pump 30 is determined. And start two pumps 30 in parallel. If it is determined that the rotational speeds of the two motors 32 have both reached the maximum rotational speed based on the discharge pressure detected by the pressure sensor 90 during the operation of the two pumps 30, the remaining one The pump 30 is additionally started to operate the three pumps 30 in parallel. In addition, if the sum of the water supply amounts detected by the flow rate sensors 50 falls below the first flow rate during the operation of the two pumps 30, one of the two pumps 30 in operation is stopped. . If the sum of the water supply amounts detected by the flow rate sensors 50 falls below the second falling flow rate during operation of the three pumps 30, one of the three pumps 30 in operation is stopped Do.
ロータリー運転の最中、制御部１１２は、所定のタイミングで継続的に、運転中のポンプ３０の積算給水量を算出し、算出した積算給水量を記憶素子１１６に記憶させる。制御部１１２はまた、ステップＳ１２において、最多積算給水量ポンプ３０ｍの積算給水量Ｑｍと最少積算給水量ポンプ３０ｓの積算給水量Ｑｓを記憶素子１１６から読み出して積算給水量比Ｒを算出し、算出した積算給水量比Ｒが設定値Ｒ１（例えば９０％）を下回っているか否かを、言い換えれば、通常時であるか否かを判定する。判定の結果、積算給水量比Ｒが設定値Ｒ１を下回っていない場合、すなわち、通常時である場合には、ステップＳ１１に戻って、ロータリー運転を継続する。 During the rotary operation, the control unit 112 continuously calculates the integrated water supply amount of the pump 30 in operation at a predetermined timing, and stores the calculated integrated water supply amount in the storage element 116. In step S12, the control unit 112 also reads out the integrated water supply amount Qm of the most integrated water supply amount pump 30m and the integrated water supply amount Qs of the minimum integrated water supply amount pump 30s from the storage element 116 to calculate the integrated water supply amount ratio R and calculates In other words, it is determined whether or not the integrated water supply amount ratio R is lower than the set value R1 (for example, 90%), that is, whether or not it is a normal time. As a result of the determination, if the integrated water supply amount ratio R is not smaller than the set value R1, that is, in the normal state, the process returns to step S11 and the rotary operation is continued.
ステップＳ１２の判定の結果、積算給水量比Ｒが設定値Ｒ１を下回っていた場合には、ステップＳ１３において、制御部１１２は、最少積算給水量ポンプ３０ｓを優先的に起動する。例えば、制御部１１２は、次回のポンプ３０起動時、例えば、次回の先発起動時または並列起動時に、最少積算給水量ポンプ３０ｓを優先的に起動する。 As a result of the determination in step S12, when the integrated water supply amount ratio R is less than the set value R1, in step S13, the control unit 112 preferentially starts the minimum integrated water supply amount pump 30s. For example, the control unit 112 preferentially starts the minimum integrated water supply amount pump 30s at the next activation of the pump 30, for example, at the next advance activation or at the time of parallel activation.
最少積算給水量ポンプ３０ｓの運転中、制御部１１２は、所定のタイミングで継続的に、運転中のポンプ３０の積算給水量を算出し、算出した積算給水量を記憶素子１１６に記憶させる。制御部１１２はまた、ステップＳ１４において、最多積算給水量ポンプ３０ｍの積算給水量Ｑｍと最少積算給水量ポンプ３０ｓの積算給水量Ｑｓを記憶素子１１６から読み出して積算給水量比Ｒを算出し、算出した積算給水量比Ｒが１００％に到達したか否か、言い換えれば、Ｒ≧１００％になったか否かを判定する。 During operation of the minimum accumulated water supply amount pump 30s, the control unit 112 continuously calculates the accumulated water supply amount of the pump 30 in operation at predetermined timing, and stores the calculated accumulated water supply amount in the storage element 116. In step S14, the control unit 112 also reads out the integrated water supply amount Qm of the most integrated water supply amount pump 30m and the integrated water supply amount Qs of the minimum integrated water supply amount pump 30s from the storage element 116 to calculate the integrated water supply amount ratio R and calculates It is determined whether the integrated water supply amount ratio R has reached 100%, in other words, whether R ≧ 100%.
ステップＳ１４の判定の結果、積算給水量比Ｒが１００％に到達していない場合には、制御部１１２は、ステップＳ１５において、最少積算給水量ポンプ３０ｓの優先運転を継続するとともに、ステップＳ１４に戻って、積算給水量比Ｒの算出と判定を継続する。ここで、最少積算給水量ポンプ３０ｓの優先運転を継続するとは、最少積算給水量ポンプ３０ｓの運転をそのまま継続することに加えて、最少積算給水量ポンプ３０ｓの停止した後に再び優先的に起動を継続することも含むことを意味している。すなわち、積算給水量比Ｒが１００％に到達するまでは、制御部１１２は、最少積算給水量ポンプ３０ｓの起動と停止を繰り返す。 As a result of the determination in step S14, when the integrated water supply amount ratio R has not reached 100%, the control unit 112 continues the priority operation of the minimum integrated water supply amount pump 30s in step S15, and proceeds to step S14. Returning, the calculation and determination of the integrated water supply amount ratio R are continued. Here, to continue the priority operation of the minimum accumulated water supply amount pump 30s means, in addition to continuing the operation of the minimum accumulated water supply amount pump 30s as it is, after stopping the minimum accumulated water supply amount pump 30s, start up again preferentially. It is meant to include continuing. That is, the control unit 112 repeatedly starts and stops the minimum integrated water supply amount pump 30s until the integrated water supply amount ratio R reaches 100%.
ステップＳ１４の判定の結果、積算給水量比Ｒが１００％に到達した場合には、制御部１１２は、ステップＳ１１に戻って、通常時のロータリー運転に復帰する。 As a result of the determination in step S14, when the integrated water supply amount ratio R reaches 100%, the control unit 112 returns to step S11 and returns to the normal rotary operation.
なお、図４の流れ図には描かれていないが、制御部１１２は、上述した制御中に給水装置１０の停止指示を受けた場合にはポンプ３０の制御を終了する。 Although not illustrated in the flowchart of FIG. 4, the control unit 112 ends the control of the pump 30 when receiving the stop instruction of the water supply device 10 during the above-described control.
このような制御によって、給水装置１０は、各ポンプ３０の積算給水量を平準化することによって、モータ軸受、メカニカルシール、インペラなど、複数台のポンプ３０の消耗部品の消耗度を平準化することが可能となる。 By such control, the water supply apparatus 10 equalizes the degree of consumption of consumable parts of the plurality of pumps 30 such as motor bearings, mechanical seals, impellers and the like by equalizing the integrated water supply amount of each pump 30. Is possible.
〔別の優先起動〕
図５は、ステップＳ１３に代わる、最少積算給水量ポンプ３０ｓを優先的に起動する別の制御の一例を示す流れ図である。
[Another priority start]
FIG. 5 is a flow chart showing an example of another control for preferentially starting the minimum accumulated feed water amount pump 30s, which replaces step S13.
ステップＳ２１において、制御部１１２は、最少積算給水量ポンプ３０ｓを強制的に起動する。 In step S21, the control unit 112 forcibly starts the minimum integrated water supply amount pump 30s.
続いて、ステップＳ２２において、制御部１１２は、最多積算給水量ポンプ３０ｍを停止する。 Subsequently, in step S22, the control unit 112 stops the most integrated water supply amount pump 30m.
ステップＳ１３は、次回のポンプ３０起動時に最少積算給水量ポンプ３０ｓを起動する制御であったが、一連のステップＳ２１とステップＳ２２は、最少積算給水量ポンプ３０ｓを強制的に起動し、その後に、最多積算給水量ポンプ３０ｍを停止する制御である。 Step S13 is control to start the minimum integrated water supply amount pump 30s at the next start of the pump 30, but a series of steps S21 and S22 forcibly start the minimum integrated water supply amount pump 30s, and thereafter, The control is to stop the most integrated water supply pump 30m.
このような制御によって、給水装置１０は、各ポンプ３０の積算給水量を平準化することによって、モータ軸受、メカニカルシール、インペラなど、複数台のポンプ３０の消耗部品の消耗度を平準化することが可能となる。 By such control, the water supply apparatus 10 equalizes the degree of consumption of consumable parts of the plurality of pumps 30 such as motor bearings, mechanical seals, impellers and the like by equalizing the integrated water supply amount of each pump 30. Is possible.
また、最少積算給水量ポンプ３０ｓを強制的に並列起動した後に、最多積算給水量ポンプ３０ｍを停止するため、運転中のポンプ３０が同時に停止することがないため、吐出し圧力の低下を招くことはない。 In addition, since the pump 30 in operation does not stop at the same time because the maximum integrated water supply amount pump 30 m is stopped after the minimum integrated water supply amount pump 30 s is forcibly started in parallel, the discharge pressure is lowered. There is no.
〔単独ロータリー運転における制御〕
以下、単独ロータリー運転におけるポンプの起動と停止の制御について説明する。以下の説明では、各部材に対して図１〜図３に示された参照符号を流用する。また、先の説明の中で定義した呼称もそのまま流用する。
[Control in single rotary operation]
Hereinafter, control of start and stop of the pump in the single rotary operation will be described. In the following description, reference numerals shown in FIGS. 1 to 3 are used for each member. Also, the names defined in the above description are used as they are.
図６は、制御部１１２によるポンプ３０の起動と停止の制御の一例を示す流れ図である。ここでは、制御部１１２は、３台のポンプ３０を単独でロータリー運転するように構成されている。以下、図６を参照しつつ、単独ロータリー運転における制御部１１２によるポンプ３０の起動と停止の制御について説明する。 FIG. 6 is a flowchart showing an example of control of start and stop of the pump 30 by the control unit 112. Here, the control unit 112 is configured to perform the rotary operation of the three pumps 30 independently. Hereinafter, control of start and stop of the pump 30 by the control unit 112 in single rotary operation will be described with reference to FIG.
制御部１１２は、通常時は、ステップＳ３１において、ロータリー運転によって、次のように、ポンプ３０の起動と停止を制御する。制御部１１２は、３台のポンプ３０の停止時に、吐出し圧力が起動圧力を下回る都度、３台のポンプ３０を順次起動する。また、制御部１１２は、１台のポンプ３０の運転中に、運転中のポンプ３０の給水量が停止流量Ｑ０（例えば１０Ｌ／ｍｉｎ）を下回った場合には、運転中のポンプ３０を停止する。 At a normal time, the control unit 112 controls the start and stop of the pump 30 by rotary operation in step S31 as follows. The control unit 112 sequentially activates the three pumps 30 each time the discharge pressure falls below the activation pressure when the three pumps 30 stop. In addition, the control unit 112 stops the operating pump 30 when the amount of water supplied to the operating pump 30 falls below the stop flow rate Q0 (for example, 10 L / min) during operation of one pump 30. .
ロータリー運転の最中、制御部１１２は、所定のタイミングで継続的に、運転中のポンプ３０の積算給水量を算出し、算出した積算給水量を記憶素子１１６に記憶させる。制御部１１２はまた、ステップＳ３２において、最多積算給水量ポンプ３０ｍの積算給水量Ｑｍと最少積算給水量ポンプ３０ｓの積算給水量Ｑｓを記憶素子１１６から読み出して積算給水量比Ｒを算出し、積算給水量比Ｒが第１の設定値Ｒ１（例えば９０％）を下回っているか否かを判定する。判定の結果、積算給水量比Ｒが第１の設定値Ｒ１を下回っていない場合には、制御部１１２は、ステップＳ３１に戻って、ロータリー運転を継続する。 During the rotary operation, the control unit 112 continuously calculates the integrated water supply amount of the pump 30 in operation at a predetermined timing, and stores the calculated integrated water supply amount in the storage element 116. In step S32, the control unit 112 also reads out the integrated water supply amount Qm of the most integrated water supply amount pump 30m and the integrated water supply amount Qs of the minimum integrated water supply amount pump 30s from the storage element 116 to calculate the integrated water supply amount ratio R and integrates It is determined whether the water supply amount ratio R is less than a first set value R1 (for example, 90%). As a result of the determination, if the integrated water supply amount ratio R is not smaller than the first set value R1, the control unit 112 returns to step S31 and continues the rotary operation.
ステップＳ３２の判定の結果、積算給水量比Ｒが第１の設定値Ｒ１を下回っていた場合には、ステップＳ３３において、制御部１１２は、給水量Ｑが、停止流量Ｑ０（例えば１０Ｌ／ｍｉｎ）よりも多く設定された第１の強制停止流量Ｑ１（例えば３０Ｌ／ｍｉｎ）以下であるか否かを判定する。判定の結果、給水量Ｑが第１の強制停止流量Ｑ１以下であった場合には、制御部１１２は、ステップＳ４１の処理に移行し、反対に、給水量Ｑが第１の強制停止流量Ｑ１以下でなかった場合には、ステップＳ５１の処理に移行する。 As a result of the determination in step S32, when the integrated water supply amount ratio R is lower than the first set value R1, in step S33, the control unit 112 determines that the water supply amount Q is the stop flow rate Q0 (for example, 10 L / min). It is determined whether it is equal to or less than the first forced stop flow rate Q1 (for example, 30 L / min) set more than that. As a result of the determination, when the water supply amount Q is equal to or less than the first forced stop flow rate Q1, the control unit 112 proceeds to the process of step S41, and conversely, the water supply amount Q is the first forced stop flow rate Q1. If not, the process proceeds to step S51.
ステップＳ３３の判定の結果、給水量Ｑが第１の強制停止流量Ｑ１以下であった場合（Ｑ０＜Ｑ≦Ｑ１）には、制御部１１２は、ステップＳ４１において、最多積算給水量ポンプ３０ｍを強制的に停止し、その後に、最少積算給水量ポンプ３０ｓを優先的に起動する。 As a result of the determination in step S33, when the water supply amount Q is equal to or less than the first forced stop flow rate Q1 (Q0 <Q ≦ Q1), the control unit 112 forces the maximum accumulated water supply amount pump 30m in step S41. After that, the minimum accumulated water supply pump 30s is preferentially started.
ステップＳ４１における最少積算給水量ポンプ３０ｓの起動後、制御部１１２は、所定のタイミングで継続的に、運転中のポンプ３０の積算給水量を算出し、算出した積算給水量を記憶素子１１６に記憶させる。制御部１１２はまた、ステップＳ４２において、最多積算給水量ポンプ３０ｍの積算給水量Ｑｍと最少積算給水量ポンプ３０ｓの積算給水量Ｑｓを記憶素子１１６から読み出して積算給水量比Ｒを算出し、積算給水量比Ｒが１００％に到達したか否か、言い換えれば、Ｒ≧１００％になったか否かを判定する。 After activation of the minimum integrated water supply amount pump 30s in step S41, the control unit 112 continuously calculates the integrated water supply amount of the operating pump 30 at a predetermined timing, and stores the calculated integrated water supply amount in the storage element 116 Let In step S42, the control unit 112 also reads out the integrated water supply amount Qm of the most integrated water supply amount pump 30m and the integrated water supply amount Qs of the minimum integrated water supply amount pump 30s from the storage element 116 to calculate the integrated water supply amount ratio R and integrates It is determined whether or not the water supply amount ratio R has reached 100%, in other words, whether R ≧ 100%.
ステップＳ４２の判定の結果、積算給水量比Ｒが１００％に到達していない場合には、制御部１１２は、ステップＳ４３において、最少積算給水量ポンプ３０ｓの優先運転を継続するとともに、ステップＳ４２に戻って、積算給水量比Ｒの算出と判定を継続する。 As a result of the determination in step S42, when the integrated water supply amount ratio R has not reached 100%, the control unit 112 continues the priority operation of the minimum integrated water supply amount pump 30s in step S43 and also proceeds to step S42. Returning, the calculation and determination of the integrated water supply amount ratio R are continued.
優先運転の意味は前述した通りである。すなわち、積算給水量比Ｒが１００％に到達するまでは、制御部１１２は、最少積算給水量ポンプ３０ｓの起動と停止を繰り返す。具体的には、最少積算給水量ポンプ３０ｓの優先起動後、制御部１１２は、給水量が停止流量Ｑ０を下回った場合には、最少積算給水量ポンプ３０ｓを停止し、吐出し圧力が起動圧力を下回った場合には、停止中の最少積算給水量ポンプ３０ｓを起動する。 The meaning of the priority operation is as described above. That is, the control unit 112 repeatedly starts and stops the minimum integrated water supply amount pump 30s until the integrated water supply amount ratio R reaches 100%. Specifically, after priority activation of the minimum integrated water supply amount pump 30s, when the water supply amount falls below the stop flow rate Q0, the control portion 112 stops the minimum integrated water supply amount pump 30s, and the discharge pressure is the activation pressure In the case of less than, the minimum integrated water supply pump 30s during stoppage is started.
ステップＳ３３の判定の結果、給水量Ｑが第１の強制停止流量Ｑ１以下でなかった場合（Ｑ１＜Ｑ）には、ステップＳ５１において、制御部１１２は、最多積算給水量ポンプ３０ｍを継続運転する。 As a result of the determination in step S33, when the water supply amount Q is not equal to or less than the first forced stop flow rate Q1 (Q1 <Q), in step S51, the control unit 112 continuously operates the largest accumulated water supply amount pump 30m. .
最多積算給水量ポンプ３０ｍの継続運転中、制御部１１２は、所定のタイミングで継続的に、運転中のポンプ３０の積算給水量を算出し、算出した積算給水量を記憶素子１１６に記憶させる。制御部１１２はまた、ステップＳ５２において、最多積算給水量ポンプ３０ｍの積算給水量Ｑｍと最少積算給水量ポンプ３０ｓの積算給水量Ｑｓを記憶素子１１６から読み出して積算給水量比Ｒを算出し、積算給水量比Ｒが、第１の設定値Ｒ１（例えば９０％）よりも低い第２の設定値Ｒ２（例えば８０％）を下回っているか否かを判定する。判定の結果、積算給水量比Ｒが第２の設定値Ｒ２を下回っていない場合、制御部１１２は、ステップＳ５１に戻って、最多積算給水量ポンプ３０ｍの継続運転を続ける。 During continuous operation of the largest accumulated water supply amount pump 30m, the control unit 112 continuously calculates the accumulated water supply amount of the pump 30 in operation at a predetermined timing, and stores the calculated accumulated water supply amount in the storage element 116. In step S52, the control unit 112 also reads out the integrated water supply amount Qm of the most integrated water supply amount pump 30m and the integrated water supply amount Qs of the minimum integrated water supply amount pump 30s from the storage element 116 to calculate the integrated water supply amount ratio R and integrates It is determined whether the water supply amount ratio R is less than a second set value R2 (for example, 80%) lower than the first set value R1 (for example, 90%). As a result of the determination, if the integrated water supply amount ratio R is not smaller than the second set value R2, the control unit 112 returns to step S51 and continues the continuous operation of the largest integrated water supply amount pump 30m.
ステップＳ５２の判定の結果、積算給水量比Ｒが第２の設定値Ｒ２を下回っていた場合、ステップＳ５３において、制御部１１２は、給水量Ｑが、停止流量Ｑ０（例えば１０Ｌ／ｍｉｎ）よりも多く設定された第１の強制停止流量Ｑ１（例えば３０Ｌ／ｍｉｎ）以下であるか否かを判定する。判定の結果、制御部１１２は、給水量Ｑが第１の強制停止流量Ｑ１以下であった場合には、ステップＳ４１の処理に移行し、反対に、給水量Ｑが第１の強制停止流量Ｑ１以下でなかった場合には、ステップＳ５１の処理に移行する。 As a result of the determination in step S52, when the integrated water supply amount ratio R is lower than the second set value R2, in step S53, the control unit 112 determines that the water supply amount Q is higher than the stop flow rate Q0 (for example, 10 L / min). It is determined whether it is equal to or less than the first forced stop flow rate Q1 (for example, 30 L / min) set many. As a result of the determination, when the water supply amount Q is equal to or less than the first forced stop flow rate Q1, the control unit 112 proceeds to the process of step S41, and conversely, the water supply amount Q is the first forced stop flow rate Q1. If not, the process proceeds to step S51.
ステップＳ５３において、制御部１１２は、給水量Ｑが、第１の強制停止流量Ｑ１（例えば３０Ｌ／ｍｉｎ）よりも多く設定された第２の強制停止流量Ｑ２（例えば５０Ｌ／ｍｉｎ）以下であるか否かを判定する。判定の結果、給水量Ｑが第２の強制停止流量Ｑ２以下であった場合には、制御部１１２は、ステップＳ５４の処理に移行し、反対に、給水量Ｑが第２の強制停止流量Ｑ２以下でなかった場合には、ステップＳ３１の処理に移行する。 In step S53, the control unit 112 determines whether the water supply amount Q is equal to or less than a second forced stop flow rate Q2 (eg, 50 L / min) set larger than the first forced stop flow rate Q1 (eg, 30 L / min). It is determined whether or not. As a result of the determination, when the water supply amount Q is equal to or less than the second forced stop flow rate Q2, the control unit 112 proceeds to the process of step S54, and conversely, the second forced stop flow rate Q2 is the water supply amount Q. If not, the process proceeds to step S31.
ステップＳ５３の判定の結果、給水量Ｑが第２の強制停止流量Ｑ２以下であった場合（Ｑ１＜Ｑ≦Ｑ２）には、ステップＳ５４において、制御部１１２は、継続運転中の最多積算給水量ポンプ３０ｍを強制的に停止し、最少積算給水量ポンプ３０ｓを優先的に起動する。 As a result of the determination in step S53, when the water supply amount Q is equal to or less than the second forced stop flow rate Q2 (Q1 <Q Q Q2), in step S54, the control unit 112 calculates the largest integrated water supply amount during continuous operation. The pump 30m is forcibly stopped, and the minimum accumulated water supply pump 30s is preferentially started.
ステップＳ５４における最少積算給水量ポンプ３０ｓの起動後、制御部１１２は、所定のタイミングで継続的に、運転中のポンプ３０の積算給水量を算出し、算出した積算給水量を記憶素子１１６に記憶させる。制御部１１２はまた、ステップＳ５５において、最多積算給水量ポンプ３０ｍの積算給水量Ｑｍと最少積算給水量ポンプ３０ｓの積算給水量Ｑｓを記憶素子１１６から読み出して積算給水量比Ｒを算出し、積算給水量比Ｒが１００％に到達したか否か、言い換えれば、Ｒ≧１００％になったか否かを判定する。 After activation of the minimum integrated water supply amount pump 30s in step S54, the control unit 112 continuously calculates the integrated water supply amount of the operating pump 30 at a predetermined timing, and stores the calculated integrated water supply amount in the storage element 116. Let In step S55, the control unit 112 also reads out the integrated water supply amount Qm of the most integrated water supply amount pump 30m and the integrated water supply amount Qs of the minimum integrated water supply amount pump 30s from the storage element 116 to calculate the integrated water supply amount ratio R and integrates It is determined whether or not the water supply amount ratio R has reached 100%, in other words, whether R ≧ 100%.
ステップＳ５５の判定の結果、積算給水量比Ｒが１００％に到達していない場合には、制御部１１２は、ステップＳ５６において、最少積算給水量ポンプ３０ｓの優先運転を継続するとともに、ステップＳ５５に戻って、積算給水量比Ｒの算出と判定を継続する。 As a result of the determination in step S55, when the integrated water supply amount ratio R does not reach 100%, the control unit 112 continues the priority operation of the minimum integrated water supply amount pump 30s in step S56, and proceeds to step S55. Returning, the calculation and determination of the integrated water supply amount ratio R are continued.
優先運転の意味は前述した通りである。すなわち、積算給水量比Ｒが１００％に到達するまでは、制御部１１２は、最少積算給水量ポンプ３０ｓの起動と停止を繰り返す。具体的には、制御部１１２は、給水量が停止流量Ｑ０を下回った場合には、最少積算給水量ポンプ３０ｓを停止し、吐出し圧力が起動圧力を下回った場合には、停止中の最少積算給水量ポンプ３０ｓを起動する。 The meaning of the priority operation is as described above. That is, the control unit 112 repeatedly starts and stops the minimum integrated water supply amount pump 30s until the integrated water supply amount ratio R reaches 100%. Specifically, when the water supply amount falls below the stop flow rate Q0, the control unit 112 stops the minimum integrated water supply amount pump 30s, and when the discharge pressure falls below the start pressure, the control unit 112 stops the stop. The integrated water supply amount pump 30s is started.
ステップＳ４２またはステップＳ５５の判定の結果、積算給水量比Ｒが１００％に到達した場合には、制御部１１２は、ステップＳ３１に戻って、通常時のロータリー運転に復帰する。 As a result of the determination in step S42 or step S55, when the integrated water supply amount ratio R reaches 100%, the control unit 112 returns to step S31 and returns to the normal rotary operation.
なお、図６の流れ図には描かれていないが、制御部１１２は、上述した制御中に給水装置１０の停止指示を受けた場合にはポンプ３０の制御を終了する。 Although not illustrated in the flowchart of FIG. 6, the control unit 112 ends the control of the pump 30 when receiving the stop instruction of the water supply device 10 during the above-described control.
このような制御によって、例えば、５０Ｌ／ｍｉｎ以下の比較的少ない水量で、運転中のポンプ３０を強制的に停止しても、吐出し圧力の低下を、アキュムレータ１００内に蓄圧された水で補充することができる。また、積算給水量比に応じて、強制停止流量を段階的に設定して、強制的に停止する確率を高め、積算給水量が少ないポンプ３０を優先的に起動することが可能となる。これにより、モータ軸受、メカニカルシール、インペラなど、複数台の各ポンプ３０の消耗部品の消耗度を平準化することが可能となる。 By such control, for example, even if the pump 30 in operation is forcibly stopped with a relatively small amount of water of 50 L / min or less, the drop in discharge pressure is replenished with water accumulated in the accumulator 100. can do. In addition, it is possible to set the forced stop flow rate in stages according to the integrated water supply amount ratio, to increase the probability of forced stop, and to preferentially start the pump 30 with a small integrated water supply amount. This makes it possible to equalize the degree of wear of consumable parts of each of the plurality of pumps 30, such as motor bearings, mechanical seals, and impellers.
実施形態では、２段階の積算給水量比と強制停止流量に基づいて制御しているが、３段階以上の積算給水量比と強制停止流量に基づいて制御してもよい。例えば、積算給水量比を９０、８０、７０、６０％とし、対応する強制停止流量を２０、３０、４０、５０Ｌ／ｍｉｎとして、４段階の積算給水量比と強制停止流量に基づいて制御してもよい。さらには、さらに多段階の積算給水量比と強制停止流量に基づいて制御してもよい。 In the embodiment, the control is performed based on the two-stage integrated water supply amount ratio and the forced stop flow rate, but the control may be performed based on the three or more stages integrated water supply amount ratio and the forced stop flow rate. For example, the cumulative water supply ratio is 90, 80, 70, 60%, and the corresponding forced stop flow rate is 20, 30, 40, 50 L / min, and controlled based on the four steps of integrated water supply ratio and forced stop flow. May be Furthermore, the control may be performed based on the multistage integrated water supply ratio and the forced stop flow rate.
実施形態では、インバータ１１４によって各ポンプ３０のモータ３２の回転速度を制御する給水装置１０を説明したが、給水装置１０は、インバータを使用せずに各ポンプ３０のモータ３２をオン／オフ制御する構成であってもよい。 In the embodiment, the water supply device 10 that controls the rotational speed of the motor 32 of each pump 30 by the inverter 114 has been described, but the water supply device 10 performs on / off control of the motor 32 of each pump 30 without using the inverter. It may be a configuration.
ここでは、一例として、３台のポンプ３０を備えた給水装置１０について説明したが、ここに説明した制御は、２台のポンプを備えた給水装置または３台よりも多い台数のポンプを備えた給水装置に対しても同様に適用可能である。 Here, although the water supply apparatus 10 provided with three pumps 30 was demonstrated as an example, the control demonstrated here provided the water supply apparatus provided with two pumps, or the number of pumps more than three. The same applies to the water supply device.
実施形態は、吐出し圧力を一定に制御する給水装置１０を説明したが、給水装置１０は、推定末端圧を一定に制御する構成であってもよい。 Although the embodiment has described the water supply device 10 which controls the discharge pressure to be constant, the water supply device 10 may be configured to control the estimated end pressure to be constant.
これまで、図面を参照しながら本発明の実施形態を述べたが、本発明は、実施形態に限定されるものではなく、その要旨を逸脱しない範囲において様々な変形や変更が施されてもよい。 Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the embodiments, and various modifications and changes may be made without departing from the scope of the present invention. .
１０…給水装置、２０…ベース、３０…ポンプ、３２…モータ、３４…吸込口、４０…連結管、５０…流量センサ、６０…逆止弁、７０…ボール弁、８０…合流管、８６…吐出し口、９０…圧力センサ、１００…アキュムレータ、１１０…制御盤、１１２…制御部、１１４…インバータ、１１６…記憶素子、１２０…架台。 DESCRIPTION OF SYMBOLS 10 ... Water supply apparatus, 20 ... Base, 30 ... Pump, 32 ... Motor, 34 ... Suction port, 40 ... Connecting pipe, 50 ... Flow sensor, 60 ... Check valve, 70 ... Ball valve, 80 ... Merging pipe, 86 ... Discharge port, 90: pressure sensor, 100: accumulator, 110: control panel, 112: control unit, 114: inverter, 116: storage element, 120: pedestal.
Claims (6)
各ポンプの給水量を検出する流量センサと、
前記複数台のポンプによって供給される水の吐出し圧力を検出する圧力センサと、
前記各流量センサと前記圧力センサの検出情報に基づいて前記複数台のポンプを制御する制御部とを備え、
前記制御部は、
通常時は、ロータリー運転によって、前記圧力センサによって検出される吐出し圧力が起動圧力を下回る都度、前記複数台のポンプを順次起動し、前記流量センサによって検出される運転中のポンプの給水量が停止流量を下回った場合には、運転中のポンプを停止し、
積算給水量が最も多いポンプの積算給水量に対する積算給水量が最も少ないポンプの積算給水量の比率である積算給水量比が、あらかじめ定めた第１の設定値を下回った場合、積算給水量が最も少ないポンプを優先的に起動し、優先的に起動したポンプの積算給水量比が１００％に到達した場合に、通常時のロータリー運転に復帰する、給水装置。 With several pumps to feed water,
A flow sensor that detects the amount of water supplied to each pump;
A pressure sensor for detecting a discharge pressure of water supplied by the plurality of pumps;
A control unit configured to control the plurality of pumps based on detection information of each of the flow rate sensors and the pressure sensor;
The control unit
Under normal conditions, each time the discharge pressure detected by the pressure sensor falls below the activation pressure by rotary operation, the plurality of pumps are sequentially activated, and the amount of water supplied to the pump during operation detected by the flow rate sensor is If it falls below the stop flow rate, stop the running pump,
If the ratio of the integrated water supply amount, which is the ratio of the integrated water supply amount of the pump with the smallest integrated water supply amount to the integrated water supply amount of the pump with the largest integrated water supply amount, falls below a first predetermined value set in advance, the integrated water supply amount is A water supply system that starts the least number of pumps first and returns to normal rotary operation when the integrated water supply ratio of the preferentially started pumps reaches 100%.
積算給水量比が、第１の設定値を下回った場合、
給水量が、停止流量よりも多く設定された第１の強制停止流量以下であれば、積算給水量が最も多い運転中のポンプである第１のポンプを強制的に停止し、その後に、積算給水量が最も少ない停止中のポンプである第２のポンプを優先的に起動し、
優先的に起動した前記第２のポンプの積算給水量比が１００％に到達するまでは、前記第２のポンプの起動と停止を繰り返し、
優先的に起動した前記第２のポンプの積算給水量比が１００％に到達した場合には、通常時のロータリー運転に復帰するとともに、
給水量が強制停止流量以下でなければ、積算給水量が最も多い前記第１のポンプを継続運転し、
積算給水量が最も少ない前記第２のポンプの積算給水量比が、第１の設定値よりも低い第２の設定値を下回った場合、給水量が、第１の強制停止流量よりも多く設定された第２の強制停止流量以下であれば、継続運転中の前記第１のポンプを強制的に停止し、その後に、停止中の前記第２のポンプを優先的に起動し、
優先的に起動した前記第２のポンプの積算給水量比が１００％に到達するまでは、前記第２のポンプの起動と停止を繰り返し、
優先的に起動した前記第２のポンプの積算給水量比が１００％に到達した場合には、通常時のロータリー運転に復帰する、請求項１に記載の給水装置。 The control unit
If the integrated water supply ratio falls below the first set value,
If the water supply amount is equal to or less than the first forced stop flow rate set larger than the stop flow rate, the first pump, which is the pump in operation with the largest integrated water supply amount, is forcibly stopped and thereafter integration is performed. Start the second pump, which is the stopped pump with the least amount of water supply, with priority.
The start and stop of the second pump are repeated until the integrated water supply amount ratio of the second pump, which is preferentially started, reaches 100%,
When the integrated water supply amount ratio of the second pump activated preferentially reaches 100%, it returns to the normal rotary operation, and
If the water supply amount is not below the forced stop flow rate, the first pump with the largest accumulated water supply amount is continuously operated,
When the integrated water supply ratio of the second pump with the smallest integrated water supply amount falls below a second set value lower than the first set value, the water supply amount is set larger than the first forced stop flow rate If it is less than or equal to the second forced stop flow rate, the first pump in continuous operation is forcibly stopped, and then the second pump being stopped is preferentially started.
The start and stop of the second pump are repeated until the integrated water supply amount ratio of the second pump, which is preferentially started, reaches 100%,
The water supply apparatus according to claim 1, wherein when the integrated water supply amount ratio of the second pump which is preferentially started reaches 100%, the operation is returned to the normal rotary operation.
前記制御部は、積算給水量比が第１の設定値を下回った場合、積算給水量が最も少ないポンプを強制的に起動した後に、積算給水量が最も多いポンプを停止する、請求項１に記載の給水装置。 The water supply device can operate at least two pumps in parallel,
The control unit, when the integrated water supply amount ratio falls below the first set value, forcibly starts the pump with the smallest integrated water supply amount, and then stops the pump with the largest integrated water supply amount. Water supply device described.
通常時は、ロータリー運転によって、吐出し圧力が起動圧力を下回る都度、前記複数台のポンプを順次起動し、運転中のポンプの給水量が停止流量を下回った場合には、運転中のポンプを停止し、
積算給水量が最も多いポンプの積算給水量に対する積算給水量が最も少ないポンプの積算給水量の比率である積算給水量比が、あらかじめ定めた第１の設定値を下回った場合、積算給水量が最も少ないポンプを優先的に起動し、優先的に起動したポンプの積算給水量比が１００％に到達した場合に、通常時のロータリー運転に復帰する、給水装置の制御方法。 A control method of a water supply apparatus comprising a plurality of pumps, the method comprising:
Under normal conditions, each time the discharge pressure falls below the start pressure by rotary operation, the plurality of pumps are sequentially started, and if the amount of water supplied by the pump in operation falls below the stop flow rate, the pump in operation is Stop
If the ratio of the integrated water supply amount, which is the ratio of the integrated water supply amount of the pump with the smallest integrated water supply amount to the integrated water supply amount of the pump with the largest integrated water supply amount, falls below a first predetermined value set in advance, the integrated water supply amount is A control method of a water supply device, wherein the pump operation with the smallest number is started preferentially, and when the integrated water supply amount ratio of the pump started preferentially reaches 100%, the operation is returned to the normal rotary operation.
給水量が、停止流量よりも多く設定された第１の強制停止流量以下であれば、積算給水量が最も多い運転中のポンプである第１のポンプを強制的に停止し、その後に、積算給水量が最も少ない停止中のポンプである第２のポンプを優先的に起動し、
優先的に起動した前記第２のポンプの積算給水量比が１００％に到達するまでは、前記第２のポンプの起動と停止を繰り返し、
優先的に起動した前記第２のポンプの積算給水量比が１００％に到達した場合には、通常時のロータリー運転に復帰するとともに、
給水量が強制停止流量以下でなければ、積算給水量が最も多い前記第１のポンプを継続運転し、
積算給水量が最も少ない前記第２のポンプの積算給水量比が、第１の設定値よりも低い第２の設定値を下回った場合、給水量が、第１の強制停止流量よりも多く設定された第２の強制停止流量以下であれば、継続運転中の前記第１のポンプを強制的に停止し、その後に、停止中の前記第２のポンプを優先的に起動し、
優先的に起動した前記第２のポンプの積算給水量比が１００％に到達するまでは、前記第２のポンプの起動と停止を繰り返し、
優先的に起動した前記第２のポンプの積算給水量比が１００％に到達した場合には、通常時のロータリー運転に復帰する、請求項４に記載の制御方法。 If the integrated water supply ratio falls below the first set value,
If the water supply amount is equal to or less than the first forced stop flow rate set larger than the stop flow rate, the first pump, which is the pump in operation with the largest integrated water supply amount, is forcibly stopped and thereafter integration is performed. Start the second pump, which is the stopped pump with the least amount of water supply, with priority.
The start and stop of the second pump are repeated until the integrated water supply amount ratio of the second pump, which is preferentially started, reaches 100%,
When the integrated water supply amount ratio of the second pump activated preferentially reaches 100%, it returns to the normal rotary operation, and
If the water supply amount is not below the forced stop flow rate, the first pump with the largest accumulated water supply amount is continuously operated,
When the integrated water supply ratio of the second pump with the smallest integrated water supply amount falls below a second set value lower than the first set value, the water supply amount is set larger than the first forced stop flow rate If it is less than or equal to the second forced stop flow rate, the first pump in continuous operation is forcibly stopped, and then the second pump being stopped is preferentially started.
The start and stop of the second pump are repeated until the integrated water supply amount ratio of the second pump, which is preferentially started, reaches 100%,
The control method according to claim 4, wherein when the integrated water supply amount ratio of the second pump which is preferentially started reaches 100%, the operation is returned to the normal rotary operation.
積算給水量比が第１の設定値を下回った場合、積算給水量が最も少ないポンプを強制的に起動した後に、積算給水量が最も多いポンプを停止する、請求項４に記載の制御方法。 The water supply device can operate at least two pumps in parallel,
The control method according to claim 4, wherein if the integrated water supply amount ratio falls below the first set value, the pump having the smallest integrated water supply amount is forcibly started and then the pump having the largest integrated water supply amount is stopped.
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| JP2000045982A (en) * | 1998-07-29 | 2000-02-15 | Teral Kyokuto Inc | Control method and device for making pump operation time of variable speed water supply device uniform |
| JP2014152698A (en) * | 2013-02-08 | 2014-08-25 | Hitachi Industrial Equipment Systems Co Ltd | Fluid compression system |
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| JPH07279854A (en) * | 1994-04-15 | 1995-10-27 | Kawamoto Seisakusho:Kk | Water supply device |
| JP2000045982A (en) * | 1998-07-29 | 2000-02-15 | Teral Kyokuto Inc | Control method and device for making pump operation time of variable speed water supply device uniform |
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