JPH09144663A - Pump number control device - Google Patents

Pump number control device

Info

Publication number
JPH09144663A
JPH09144663A JP30400795A JP30400795A JPH09144663A JP H09144663 A JPH09144663 A JP H09144663A JP 30400795 A JP30400795 A JP 30400795A JP 30400795 A JP30400795 A JP 30400795A JP H09144663 A JPH09144663 A JP H09144663A
Authority
JP
Japan
Prior art keywords
water
pumps
control
pump
pumping
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP30400795A
Other languages
Japanese (ja)
Inventor
Junji Ono
順次 小野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
Original Assignee
Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Meidensha Corp, Meidensha Electric Manufacturing Co Ltd filed Critical Meidensha Corp
Priority to JP30400795A priority Critical patent/JPH09144663A/en
Publication of JPH09144663A publication Critical patent/JPH09144663A/en
Pending legal-status Critical Current

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  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)

Abstract

PROBLEM TO BE SOLVED: To enhance the follow-up property to water conveying quantity and pump discharge rate of flow, and stabilize water conveyance in a pump number control device for controlling the operating number of storage pumps in a purification plant. SOLUTION: This device has a comparison part 17 for determining the operating number of storage pumps so that the flow rate of conveying water never exceeds total flow rate of pumping water; a water level control part 15 for determining the operating number of pumps on the basis of the water level of a purification pond, and also increasing and decreasing the operating number of pumps on the basis of the change ratio of level of the purification pond; a comparison part 18 for controlling the operating number of pumps when the deviation between a main pipe pressure and a pressure control set P5 is large; and a comparison part 19 for controlling the operating number of storage pumps when the deviation between water conveying quantity and pump discharge rate of flow is the discharge quantity of one storage pump or more.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、浄水場における揚
水ポンプの運転台数を制御するポンプ台数制御装置に関
する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump number control device for controlling the number of pumping pumps operating in a water purification plant.

【0002】[0002]

【従来の技術】浄水場の取水から浄水池を経て送水する
過程で、沈砂池から沈澱池へ揚水するための揚水ポンプ
において、可変速制御を行っていない揚水ポンプの台数
制御では、図2のように浄水池の水位のみで揚水ポンプ
の台数制御を行っている。
2. Description of the Related Art In a pumping pump for pumping water from a sand basin to a sedimentation basin during the process of pumping water from a water purification plant through a water purification basin, the number of pumping pumps that do not perform variable speed control is shown in FIG. As described above, the number of pumps is controlled only by the water level in the water purification pond.

【0003】図2は従来の制御装置の一例であり、1
は、制御水位設定器2および運転順序設定器3を有した
監視制御装置である。4は水位制御部5および台数制御
回路6からなるシーケンスコントローラであり、監視制
御装置1とは伝送で接続されている。7は沈砂池、8は
沈澱池、9は浄水池、10は水位計、P1は揚水ポン
プ、P2は送水ポンプ、PHは本管圧力計、Vは流量調
整弁である。
FIG. 2 shows an example of a conventional control device.
Is a supervisory control device having a control water level setting device 2 and an operation sequence setting device 3. Reference numeral 4 denotes a sequence controller including a water level control unit 5 and a unit number control circuit 6, which is connected to the monitoring control device 1 by transmission. 7 sand basin, 8 sedimentation, 9 purified water reservoir, 10 water level gauge, P1 is pumping pump, P2 is a water pump, P H is mains pressure gauge, V is a flow regulating valve.

【0004】水位制御部5は、制御水位設定器2および
水位計10の各出力信号の偏差を求め、台数制御回路6
は前記偏差と運転順序設定器3の出力信号に基づいて、
揚水ポンプP1の運転台数を決定し、運転制御する。
The water level control unit 5 obtains the deviation between the output signals of the control water level setting device 2 and the water level gauge 10, and calculates the number of units control circuit 6
Is based on the deviation and the output signal of the operation sequence setting device 3,
The number of operating pumps P1 is determined and the operation is controlled.

【0005】[0005]

【発明が解決しようとする課題】上記のような従来の装
置では、揚水から送水までは沈澱池8と浄水池9を経由
していることと、吐出弁を含めポンプの起動から揚水ま
で数分の時間がかかるということから、送水量により浄
水池水位が変動した後、揚水ポンプP1を起動しても、
送水量の変動にうまく追従できないという問題点があっ
た。
In the conventional apparatus as described above, the pumping to the water feeding is via the settling basin 8 and the water purification basin 9, and it takes several minutes from the start of the pump including the discharge valve to the pumping. Therefore, even if the pumping pump P1 is started after the water level of the water purification pond changes depending on the amount of water sent,
There was a problem that it was not possible to follow the fluctuations in the amount of water sent.

【0006】本発明は上記の点に鑑みてなされたもので
その目的は、送水量と揚水量の追従性を良くして送水の
安定化を図ったポンプ台数制御装置を提供することにあ
る。
The present invention has been made in view of the above points, and an object of the present invention is to provide a pump number control device which stabilizes the water supply by improving the followability of the water supply amount and the pumped water amount.

【0007】[0007]

【課題を解決するための手段】本発明は、浄水場におけ
る揚水ポンプの運転台数を制御するポンプ台数制御装置
において、送水流量が揚水総流量を越えないように揚水
ポンプの運転台数を決定する第1の制御部と、浄水池の
水位に基づいて揚水ポンプの運転台数を決定する第2の
制御部と、浄水池の水位の変化率に応じて揚水ポンプの
運転台数を増減させる第3の制御部と、本管圧力と設定
圧力との偏差が大きいときに揚水ポンプの運転台数を増
減させる第4の制御部と、送水量と揚水量の偏差が揚水
ポンプ吐出量1台分以上のときに揚水ポンプの運転台数
を増減させる第5の制御部とを備え、前記第1〜第4制
御部の制御出力により揚水ポンプの運転台数を制御する
ことを特徴としている。
According to the present invention, in a pump number control device for controlling the number of pumping pumps operating in a water purification plant, the number of pumping pumps to be operated is determined so that the pumped water flow rate does not exceed the total pumped flow rate. No. 1 control unit, a second control unit that determines the operating number of pumping pumps based on the water level of the water purification pond, and third control that increases or decreases the operating number of pumping pumps according to the rate of change of the water level of the water purification pond. Section, a fourth control section that increases or decreases the number of pumped pumps operating when the deviation between the main pressure and the set pressure is large, and when the deviation between the pumped water quantity and the pumped water quantity is one pump pump discharge quantity or more A fifth control unit for increasing or decreasing the number of pumping pumps to be operated is provided, and the number of pumping pumps to be operated is controlled by the control outputs of the first to fourth control units.

【0008】[0008]

【発明の実施の形態】以下図面を参照しながら本発明の
実施の形態を説明する。本発明では送水量の安定をより
良く行うために、送水流量と揚水流量を比較し、浄水池
の水位変化を予測して揚水ポンプの運転、停止を行うよ
うにした。また揚水ポンプ停止から浄水池水位上昇停止
までの時間遅れを考慮し、浄水池の水位が上限値を越え
ないように調整する。
Embodiments of the present invention will be described below with reference to the drawings. In the present invention, in order to improve the stability of the water supply amount, the water supply flow rate and the pumping flow rate are compared, and the change in the water level of the water purification pond is predicted to operate and stop the pumping pump. Also, considering the time delay from the stop of the pumping pump to the stop of rising of the water level of the water treatment pond, the water level of the water treatment pond is adjusted so as not to exceed the upper limit.

【0009】図1において、図2と同一部分は同一符号
をもって示している。11は制御水位設定器2、運転順
序設定器3および圧力制御設定器12から成る監視制御
装置である。14はシーケンスコントローラであり、次
のように構成されている。
In FIG. 1, the same parts as those in FIG. 2 are designated by the same reference numerals. Reference numeral 11 is a monitoring control device including a control water level setting device 2, an operation sequence setting device 3, and a pressure control setting device 12. Reference numeral 14 is a sequence controller, which is configured as follows.

【0010】浄水池水位制御部15は、浄水池水位(図
2の水位計10による)と制御水位設定器2の信号に基
づいて水位制御信号をポンプ台数制御部16に供給す
る。比較部17は送水量(合計)とNP(N台×1台当
たりの揚水ポンプ吐出量)を比較しN台分の運転指令を
ポンプ台数制御部16に出力する。比較部18は本管圧
力(図2の本管圧力計PHによる)と本管圧力制御設定
Sとの偏差が大きいときにポンプ台数制御部16に増
減制御信号を出す。比較部19は、送水量と揚水量の偏
差を求め、送水量が揚水量よりも揚水ポンプ吐出量1台
分(ΔQ)以上多くなったときにポンプ台数制御部16
に増加の制御信号を出す。
The water purification pond water level control unit 15 supplies a water level control signal to the pump number control unit 16 based on the water level of the water purification pond (by the water level meter 10 in FIG. 2) and the signal of the control water level setting device 2. The comparison unit 17 compares the water supply amount (total) with the NP (N units × pumping pump discharge amount per unit) and outputs an operation command for N units to the pump number control unit 16. The comparison unit 18 outputs an increase / decrease control signal to the pump number control unit 16 when the deviation between the main pipe pressure (by the main pipe pressure gauge P H in FIG. 2) and the main pipe pressure control setting P S is large. The comparison unit 19 obtains a deviation between the pumped water amount and the pumped water amount, and when the pumped water amount is more than the pumped pumping amount by one pump (ΔQ) or more, the number of pumps control unit 16
Issue an increase control signal.

【0011】[0011]

【実施例】図1の装置における具体的な制御は以下のよ
うに実施した。
EXAMPLE The concrete control in the apparatus of FIG. 1 was carried out as follows.

【0012】(1)制御水位内で送水流量<揚水総流量
(揚水ポンプ吐出流量×N台)で予めN台を運転する。
(1) The N pumps are operated in advance within the control water level such that the water supply flow rate is less than the total pumping flow rate (pumping pump discharge flow rate × N pumps).

【0013】(2)流入量>送水量の時、浄水池水位が
M2を超えると1台減らす。
(2) When the inflow rate is greater than the water supply rate, the water level of the water treatment pond is reduced by one when the water level exceeds M2.

【0014】(3)そのままN台運転時に、浄水池水位
M1以下のとき、1台追加する。
(3) When N water tanks are operated as they are and the water level is below the water level M1, one water tank is added.

【0015】(4)送水量が増えて、浄水池水位がM1
以下となって、これが一定時間継続したときか、または
水位変化率下降の時は、2台を追加起動する。
(4) The water level increased to M1
Below, when this continues for a certain period of time, or when the rate of change in water level falls, two units are additionally activated.

【0016】(5)前記(1)〜(4)の水位制御に併
用して、下記の時に揚水ポンプの台数を増減させる。
(5) In combination with the water level control of the above (1) to (4), the number of pumping pumps is increased or decreased at the following times.

【0017】ア.本管圧力制御設定の偏差が大きい(P
S±ΔP)時 イ.送水量と揚水量の偏差が揚水ポンプ吐出量1台分以
上(ΔQ)の時。
A. Deviation in main pressure control setting is large (P
At S ± ΔP) a. When the difference between the amount of pumped water and the amount of pumped water is one pump pump discharge amount or more (ΔQ).

【0018】[0018]

【発明の効果】以上のように本発明によれば、送水流量
が揚水総流量を越えないように揚水ポンプの運転台数を
決定する第1の制御部と、浄水池の水位に基づいて揚水
ポンプの運転台数を決定する第2の制御部と、浄水池の
水位の変化率に応じて揚水ポンプの運転台数を増減させ
る第3の制御部と、本管圧力と設定圧力との偏差が大き
いときに揚水ポンプの運転台数を増減させる第4の制御
部と、送水量と揚水量の偏差が揚水ポンプ吐出量1台分
以上のときに揚水ポンプの運転台数を増減させる第5の
制御部とを備えたので、次のような優れた効果が得られ
る。
As described above, according to the present invention, the first control unit which determines the number of pumping pumps to be operated so that the flow rate of the pumped water does not exceed the total pumped flow rate, and the pumping pump based on the water level of the water purification pond. When the deviation between the main pressure and the set pressure is large, the second control unit that determines the number of operating pumps and the third control unit that increases or decreases the number of operating pumps according to the rate of change of the water level in the water purification pond And a fourth control unit for increasing / decreasing the number of pumping pumps to be operated, and a fifth control unit for increasing / decreasing the number of pumping pumps to be operated when the deviation between the water supply amount and the pumping amount is one pumping pump discharge amount or more. Since it is provided, the following excellent effects can be obtained.

【0019】(1)浄水池水位変化をより早く把握し
て、揚水ポンプ台数制御を行っているため、送水の安定
性(送水量と揚水量の追従性)が良くなる。
(1) Since the change in the water level of the water purification pond is grasped earlier and the number of pumps for pumping is controlled, the stability of the water supply (the followability of the water supply and the pumped water) is improved.

【0020】(2)水位変化のみでなく本管圧力を考慮
しているため、別途組み合わせ制御される流量調整弁の
制御をカバーすることができる。
(2) Since not only the water level change but also the main pipe pressure is taken into consideration, it is possible to cover the control of the flow rate adjusting valve which is separately combined and controlled.

【0021】(3)浄水池水位の変動巾のみでなく、変
化率をとらえているため浄水池の水位上限値を超えない
よう調整することができる。
(3) Since not only the fluctuation range of the water level of the water purification pond but also the rate of change is captured, it is possible to make adjustment so as not to exceed the upper limit of the water level of the water purification pond.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施例を示すブロック図。FIG. 1 is a block diagram showing one embodiment of the present invention.

【図2】従来のポンプ台数制御装置の一例を示すブロッ
ク図。
FIG. 2 is a block diagram showing an example of a conventional pump number control device.

【符号の説明】[Explanation of symbols]

1,11…監視制御装置 2…制御水位設定器 4,14…シーケンスコントローラ 5,15…水位制御部 10…水位計 12…圧力制御設定器 16…ポンプ台数制御部 17,18,19…比較部 1, 11 ... Monitoring and control device 2 ... Control water level setting device 4, 14 ... Sequence controller 5, 15 ... Water level control unit 10 ... Water level gauge 12 ... Pressure control setting device 16 ... Pump number control unit 17, 18, 19 ... Comparison unit

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 浄水場における揚水ポンプの運転台数を
制御するポンプ台数制御装置において、 送水流量が揚水総流量を越えないように揚水ポンプの運
転台数を決定する第1の制御部と、浄水池の水位に基づ
いて揚水ポンプの運転台数を決定する第2の制御部と、
浄水池の水位の変化率に応じて揚水ポンプの運転台数を
増減させる第3の制御部と、本管圧力と設定圧力との偏
差が大きいときに揚水ポンプの運転台数を増減させる第
4の制御部と、送水量と揚水量の偏差が揚水ポンプ吐出
量1台分以上のときに揚水ポンプの運転台数を増減させ
る第5の制御部とを備え、 前記第1〜第4制御部の制御出力により揚水ポンプの運
転台数を制御することを特徴とするポンプ台数制御装
置。
1. A pump number control device for controlling the number of pumping pumps operating in a water purification plant, a first control unit for determining the number of pumping pumps operating so that the flow rate of the pumped water does not exceed the total pumped flow rate, and a water treatment pond. A second control unit that determines the number of pumping pumps to be operated based on the water level of
A third control unit that increases / decreases the number of operating pumps according to the rate of change of the water level in the water purification pond, and a fourth control that increases / decreases the number of operating pumps when the deviation between the main pressure and the set pressure is large. Section and a fifth control section for increasing or decreasing the number of pumping pumps operating when the deviation between the pumped water quantity and the pumped water quantity is one pump pump discharge amount or more, and the control outputs of the first to fourth control sections. The number-of-pumps control device is characterized by controlling the number of pumping pumps to be operated.
JP30400795A 1995-11-22 1995-11-22 Pump number control device Pending JPH09144663A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30400795A JPH09144663A (en) 1995-11-22 1995-11-22 Pump number control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30400795A JPH09144663A (en) 1995-11-22 1995-11-22 Pump number control device

Publications (1)

Publication Number Publication Date
JPH09144663A true JPH09144663A (en) 1997-06-03

Family

ID=17927945

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30400795A Pending JPH09144663A (en) 1995-11-22 1995-11-22 Pump number control device

Country Status (1)

Country Link
JP (1) JPH09144663A (en)

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