JPS60243701A - Water level control device - Google Patents
Water level control deviceInfo
- Publication number
- JPS60243701A JPS60243701A JP9951884A JP9951884A JPS60243701A JP S60243701 A JPS60243701 A JP S60243701A JP 9951884 A JP9951884 A JP 9951884A JP 9951884 A JP9951884 A JP 9951884A JP S60243701 A JPS60243701 A JP S60243701A
- Authority
- JP
- Japan
- Prior art keywords
- water level
- pump
- control device
- pumps
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 238000010276 construction Methods 0.000 claims 1
- 239000010865 sewage Substances 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 206010000234 Abortion spontaneous Diseases 0.000 description 1
- 241000255789 Bombyx mori Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 208000015994 miscarriage Diseases 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 208000000995 spontaneous abortion Diseases 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Feedback Control In General (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は下水処理場等におけるポンプ井の水位制御装置
に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a water level control device for a pump well in a sewage treatment plant or the like.
従来の技術
例えば下水処理場におけるポンプ井においては、流入汚
水量の変化にしたがってポンプの運転台数を増減させる
必要があり、そのために汚水量の変化をポンプ井水位の
変化で検出し、ポンプ運転台数を変えてポンプ井水位を
一定範囲内にする制御が行なわれている。Conventional technology For example, in pump wells at sewage treatment plants, it is necessary to increase or decrease the number of pumps in operation according to changes in the amount of inflowing sewage. To do this, changes in the amount of sewage are detected by changes in the water level of the pump well, and the number of pumps in operation is increased or decreased. The water level in the pump well is controlled to be within a certain range by changing the water level.
第４図はその従来の水位制御装置を示したものでポンプ
井／の水位を水位計ＪＫよって検出し、検出値Ｌｉをポ
ンプ台数制御装置３とＰ工調節計ダに出力する。アエ調
節計ｑには、水位設定器５によって設定された値ＳＶ（
この８ｖは第６図で示すようにポンプ吐出量に関係なく
一定ンが入力されており、この調節計りは（水位目標値
ＳＶ−ポンプ井水位Ｌｉ−δ）なる偏差をめ、この偏差
δｄｔ
δが最小となるようＭ Ｖ ！ ｘｔａ＋、／”−（た
だしに□は定数、ＴＩ′ｉ時間）なる演算を行ない、と
のＭＹＫて可変速度制御装置６を介して電動機Ｍ！を制
御し、もってポンプＰ１の回転数を制御する。ポンプＰ
２〜Ｐｎについては、水位に応じてポンプ台数制御装置
３の出力−によって夫々電動機Ｍ、〜Ｍｎを介して運転
される。すなわち第６図において、線８ｔはポンプの始
動ライン、線Ｂｐは停止ラインで、今ある時刻ｔｌ に
おいてポンプ吐出量ｑ１で水位Ａ点にあり、この水位に
対応した台数のポンプが運転されてい７たとき、時刻ｔ
！で水位が上昇してＢ点になると、ポンプ台、数制御装
置３はポ台数を増加する制御を行う。次に水位が低下し
てＤ点に移るとポンプ台数制御装置３はポンプ吐出量を
ｑｔ （水位Ｅ点）にすべくポンプ台数を減少方向に制
御する。FIG. 4 shows the conventional water level control device, in which the water level of the pump well is detected by a water level gauge JK, and the detected value Li is output to the pump number control device 3 and the P controller. The air controller q has a value SV (
As shown in Fig. 6, this 8v is input as a constant value regardless of the pump discharge amount, and this adjustment meter calculates the deviation (target water level value SV - pump well water level Li - δ), and this deviation δdt δ M V ! xta+, /"- (where □ is a constant and time TI'i) is calculated, and MYK controls the electric motor M! via the variable speed control device 6, thereby controlling the rotation speed of the pump P1. .Pump P
2 to Pn are operated via electric motors M, to Mn, respectively, by the output of the pump number control device 3 according to the water level. In other words, in Fig. 6, the line 8t is the start line of the pump, and the line Bp is the stop line.At the current time tl, the water level is at point A with the pump discharge amount q1, and the number of pumps corresponding to this water level are being operated. , time t
! When the water level rises to point B, the pump number controller 3 performs control to increase the number of pumps. Next, when the water level decreases and moves to point D, the pump number control device 3 controls the number of pumps in a decreasing direction to bring the pump discharge amount to qt (water level point E).
発明が解決しようとする問題点
ところで、この種従来の制御装置は水位設定値ＳＶを第
５図で示すように一定値に設定しているため、吐出流量
Ｑｏは第７図の点線で示すようにその変化の度合が非常
に多くなりこのためポンプの起動、停止の頻度が激しく
なって電動機の寿命が短くなる。また吐出量についても
ハンチングが生ずる等の問題を有している。なお同図に
おける実Ｍｌ は流入流量である。Problems to be Solved by the Invention Incidentally, in this type of conventional control device, the water level setting value SV is set to a constant value as shown in FIG. 5, so the discharge flow rate Qo is set as shown by the dotted line in FIG. As a result, the frequency of starting and stopping of the pump increases, shortening the life of the motor. There are also problems with the discharge amount, such as hunting. Note that the actual Ml in the figure is the inflow flow rate.
本発＃ＪＦｉ上記従来の問題の除去を目的としてなされ
たものである。This #JFi was developed for the purpose of eliminating the above-mentioned conventional problems.
問題点を解決するための手段
本発明はポンプ井の水位信号をＰ工調節計に導入して水
位設定値と比較し、その偏差値に基き可変速度制御装置
を介してポンプを運転すると共へポンプ台数制御装置を
通して水位信号に応じたポンプ台数制御を行うとき、ポ
ンプの運転状態信号を水位設定器に導入し、この設定器
において予め定められたポンプ吐出量との積をめ、この
積値をア■調節計に水位設定値として出力するようＫし
たものである。Means for Solving the Problems The present invention introduces the water level signal of the pump well into the P controller, compares it with the water level set value, and operates the pump via a variable speed control device based on the deviation value. When controlling the number of pumps according to the water level signal through the pump number control device, the pump operating status signal is introduced into the water level setting device, the setting device multiplies it with the predetermined pump discharge amount, and this product value is calculated. is outputted to the controller as the water level set value.
実施例 以下図に基いて本発明の一実施例を詳述する。Example An embodiment of the present invention will be described in detail below based on the drawings.
第１図はその一実施例を示すもので、第４図とＨ雉会の
ものＨｍｌ一部分であスー１０は水位詩宗器で、この水
位設定器１０には前もって使用される各ポンプの定格吐
出量が夫々設定され保有している。Figure 1 shows an example of this. The discharge amount is set and stored respectively.
またこの水位設定器ｉｏには運転状態信号が入力され、
この信号はポンプ台数制御後！ｔ３における電動機の運
転、停止回路の運転指令リレーの出力で、運転状態でＬ
Ｏ１停止状態で００とする。In addition, an operating status signal is input to this water level setting device io,
This signal is after controlling the number of pumps! The output of the operation command relay of the motor operation and stop circuit at t3 is L in the operation state.
Set to 00 when O1 is stopped.
以上のように構成されたものにおいてその動作を説明す
る。The operation of the device configured as described above will be explained.
ポンプＦ、〜ＰｎＫ対する台数制御は第４図で示す従来
と同様、ポンプ井／の水位に応じてポンプ台数制御装置
１．？の出力ｐｉ（吐出量ｑ１のポンプＮ０１１の始動
／停止）によって台数制御がなされる。The number of pumps F, ~PnK is controlled by the pump number control device 1 according to the water level of the pump well, as in the conventional case shown in FIG. ? The number of pumps is controlled by the output pi (start/stop of pump N011 with discharge amount q1).
これと同時にポンプ台数制御後＃３よりの電動機に対す
る始動あるＬｎａ停止の出力信号ｐ１は水位設９器１０
Ｋ４１印加され、その運転状態信号であるｐ１と前もっ
て記憶されているポンプ固有の定格吐出量とが積算され
る。例えば今ＮＯ，Ｋ （Ｐｎ ）のポンプが運転され
、そのポンプの定格吐出量がＱｋ（この値は前もって知
れて水位設定器に記憶されている）とすると、
により、水位設定値をＬ［］ｖｚ ｋｌ ｑ ＋ ｋｇ
（ただしｋｉ、に、は定数）にて定める。このように
して設定することによって第２図で示すように、その設
定値ｓｖ’はポンプの吐出容量ｐ １（Ｘ：Ｐｋｑｋ−
ｑ ）に応じて可変することになる。したがってこの設
定値ｓｖ’はＰ工調節計弘に入力されて水位検出値Ｌ１
との偏差がめられ、その偏差に応じて可変速度制御装
置≦、電動機Ｍｌ を介してポンプア１が速度制御され
て吐出量が調整される。At the same time, after controlling the number of pumps, the output signal p1 for starting and stopping Lna for the electric motor from #3 is the water level setting device 10.
K41 is applied, and p1, which is the operating state signal, and the pump-specific rated discharge amount stored in advance are integrated. For example, if a NO, K (Pn) pump is currently being operated and the rated discharge amount of the pump is Qk (this value is known in advance and stored in the water level setting device), then the water level set value can be set to L[] by vz kl q + kg
(However, ki is a constant). By setting in this way, as shown in FIG.
q). Therefore, this set value sv' is input to the P engineering controller and the detected water level L1
According to the deviation, the speed of the pump 1 is controlled via the variable speed control device≦, and the electric motor Ml to adjust the discharge amount.
第３図は上記のｒつな水位設定値を用いた場合における
水位りと流入流量Ｑ’ ｒ吐出流量ＱＯを示したもので
、吐出流量ＱＯは第７図で示す従来のものと比較して急
激な変化は生じてこないことがわかる。Figure 3 shows the water level and inflow flow rate Q'r discharge flow rate QO when using the above three water level setting values, and the discharge flow rate QO is compared with the conventional one shown in Figure 7. It can be seen that no sudden changes occur.
発明の効果
以上のように本発明はポンプの運転状態すなわち吐出量
に応じて水位設定値を設定し、蚕食速度制御装置を介し
てポンプを制御するようにしたものであるから、水位に
対応したポンプ台数運転の始動、停止の頻度は大巾に低
減され電動機等の寿命が長くなり、且つ吐出流量にハン
チングが生ずるようなこともなくなる。Effects of the Invention As described above, in the present invention, the water level set value is set according to the operating state of the pump, that is, the discharge amount, and the pump is controlled via the silkworm erosion rate control device. The frequency of starting and stopping the number of pumps is greatly reduced, the life of electric motors, etc. is extended, and hunting in the discharge flow rate is eliminated.
第１図は本発明の一実施例を示す回路構成図、第２図は
本発明による水位設定値の説明図、第３図は本発明によ
る水位、流入流産および吐出流量の関係図、第４図は従
来の水位制御装置の構成図、第５図は従来の水位設定値
の説明図、第６図は水位とポンプ台数制御の関係を示す
説明図、第７図は従来の水位制御における水位、流入流
量および吐出流量の関係図である。
／・・・ポンプ井、３・・・ポンプ台数制御装置、ダ・
・・Ｐ工調節計、６・・・可変速度制御装置、 ｉｏ・
・・水位設定器。FIG. 1 is a circuit configuration diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of water level setting values according to the present invention, FIG. 3 is a relationship diagram of water level, inflow miscarriage, and discharge flow rate according to the present invention, and FIG. Figure 5 is a diagram showing the configuration of a conventional water level control device, Figure 5 is an explanatory diagram of the conventional water level setting value, Figure 6 is an explanatory diagram showing the relationship between water level and pump number control, and Figure 7 is the water level in conventional water level control. , is a relationship diagram between an inflow flow rate and a discharge flow rate. /... Pump well, 3... Pump number control device, da...
... P engineering controller, 6... variable speed control device, io.
...Water level setting device.
Claims (1)
と比較し、その偏差値に基を可変速度制御装置を介して
ポンプを運転すると共に、ポンプ台数制御装置を介して
水位信号に応じたポンプ台数制御を行うようにしたもの
に於て、前記ポンプ台数制御装置よりのポンプ運転台数
の出力信号を水位設定器に導入し、この水位設定器にて
予め定められたポンプ吐出量との積をめ、この積値をＰ
工調節計に水位設定値として出力する・よう構成したこ
とを特徴とする水位制御装置。The water level signal of the pump well is introduced into the P controller and compared with the water level set value, and based on the deviation value, the pump is operated via the variable speed control device, and the water level signal is converted to the water level signal via the pump number control device. In the system, the output signal of the number of pumps in operation from the pump number control device is introduced into the water level setting device, and the water level setting device controls the pump discharge amount and the pump discharge amount determined in advance. Find the product of P
A water level control device characterized in that it is configured to output a water level setting value to a construction controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9951884A JPS60243701A (en) | 1984-05-17 | 1984-05-17 | Water level control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9951884A JPS60243701A (en) | 1984-05-17 | 1984-05-17 | Water level control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60243701A true JPS60243701A (en) | 1985-12-03 |
Family
ID=14249465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9951884A Pending JPS60243701A (en) | 1984-05-17 | 1984-05-17 | Water level control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60243701A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0619431A1 (en) * | 1993-03-30 | 1994-10-12 | Ebara Corporation | Pump system and method for operating the same |
| FR2837244A1 (en) * | 2002-03-14 | 2003-09-19 | Implantation Et De Diffusion D | Pump, for a drainage system, is controlled according to the liquid flows to ensure that there is no dry running |
| GB2531291B (en) * | 2014-10-14 | 2019-12-04 | Aspen Pumps Ltd | Liquid level detector |
| WO2020113113A1 (en) * | 2018-11-28 | 2020-06-04 | Bjm Pumps Llc | In-line pumping apparatus, system and method for increasing liquid flow in gravity networks |
| GB2601933A (en) * | 2018-11-28 | 2022-06-15 | Bjm Pumps Llc | In-line pumping apparatus, system and method for increasing liquid flow in gravity networks |
| DE102023103395A1 (en) | 2023-02-13 | 2024-08-14 | KSB SE & Co. KGaA | Method for detecting an anomaly of a sewage pump installed wet in a shaft or basin |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS597290B2 (en) * | 1977-05-02 | 1984-02-17 | 株式会社クボタ | Stem culm binding device |
-
1984
- 1984-05-17 JP JP9951884A patent/JPS60243701A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS597290B2 (en) * | 1977-05-02 | 1984-02-17 | 株式会社クボタ | Stem culm binding device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0619431A1 (en) * | 1993-03-30 | 1994-10-12 | Ebara Corporation | Pump system and method for operating the same |
| US5667362A (en) * | 1993-03-30 | 1997-09-16 | Ebara Corporation | Pump system and method for operating the same |
| FR2837244A1 (en) * | 2002-03-14 | 2003-09-19 | Implantation Et De Diffusion D | Pump, for a drainage system, is controlled according to the liquid flows to ensure that there is no dry running |
| GB2531291B (en) * | 2014-10-14 | 2019-12-04 | Aspen Pumps Ltd | Liquid level detector |
| WO2020113113A1 (en) * | 2018-11-28 | 2020-06-04 | Bjm Pumps Llc | In-line pumping apparatus, system and method for increasing liquid flow in gravity networks |
| GB2601933A (en) * | 2018-11-28 | 2022-06-15 | Bjm Pumps Llc | In-line pumping apparatus, system and method for increasing liquid flow in gravity networks |
| GB2601933B (en) * | 2018-11-28 | 2023-10-25 | Dumonceaux Stephane | In-line pumping apparatus, system and method for increasing liquid flow in gravity networks |
| DE102023103395A1 (en) | 2023-02-13 | 2024-08-14 | KSB SE & Co. KGaA | Method for detecting an anomaly of a sewage pump installed wet in a shaft or basin |
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