JPH05331902A - Design method for pressure type sewage facility and control method - Google Patents

Design method for pressure type sewage facility and control method

Info

Publication number
JPH05331902A
JPH05331902A JP4240153A JP24015392A JPH05331902A JP H05331902 A JPH05331902 A JP H05331902A JP 4240153 A JP4240153 A JP 4240153A JP 24015392 A JP24015392 A JP 24015392A JP H05331902 A JPH05331902 A JP H05331902A
Authority
JP
Japan
Prior art keywords
water level
pumps
pipeline
sewage
pump
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
JP4240153A
Other languages
Japanese (ja)
Inventor
Shinichi Okamoto
眞一 岡本
Seiichi Kamioka
成一 上岡
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.)
Kubota Corp
Original Assignee
Kubota Corp
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 Kubota Corp filed Critical Kubota Corp
Priority to JP4240153A priority Critical patent/JPH05331902A/en
Publication of JPH05331902A publication Critical patent/JPH05331902A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To purge filth deposited in a pipeline and protect the pipeline from being clogged by driving simultaneously two pumps installed in a dirty water tank once within a specified time without fail. CONSTITUTION:At least two pumps 3 and 4 are installed to a dirty water tank 2 so that the pumps may forcibly send dirty water to purification works by way of a pipeline 1b. The pipe diameter of the pipeline 1b and the capacity of the pumps 3 and 4 are designed so as to obtain the lowest velocity capable of sending the filth deposited in the pipeline 1b if the two pumps are driven simultaneously in this case. When the detected water level by a water level detection means 8 installed in the dirty water tank 2 reaches a first water level HWL 1 (highest water level), one pump is driven while the both pumps are driven when the detected water level reaches a second water level HWL 2. Furthermore, it is controlled so that the two pumps 3 and 4 may be driven simultaneously once in a specified time without fail so as to purge the filth deposited in the pipeline.

Description

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

【0001】[0001]

【産業上の利用分野】本発明は、汚水槽と、汚水を処理
場に搬送する管路と、前記汚水槽に流入する汚水を前記
管路に圧送するポンプとから構成してある圧力式下水施
設において、前記汚水槽に、貯溜汚水の水位を検出する
水位検出手段と、二台のポンプを設け、前記水位検出手
段による検出水位が第一水位に達すると一方のポンプを
作動し、検出水位が第一水位より高い第二水位に達する
と両方のポンプを作動するように制御する圧力式下水施
設の設計方法並びに制御方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure type sewage system comprising a wastewater tank, a pipeline for conveying the wastewater to a treatment plant, and a pump for pumping the wastewater flowing into the wastewater tank to the pipeline. In the facility, the waste water tank is provided with a water level detecting means for detecting the water level of the stored waste water and two pumps, and when the water level detected by the water level detecting means reaches the first water level, one pump is activated to detect the water level. The present invention relates to a design method and a control method of a pressure type sewerage facility that controls both pumps to operate when a second water level higher than the first water level is reached.

【0002】[0002]

【従来の技術】一般に、圧力式下水施設では、管路内に
汚物が堆積して詰まることのないように、汚物の搬送が
可能な一定の最少流速がある頻度、例えば一日に一度の
頻度で出現するように管径及びポンプ容量を設定してあ
る。そして、時間当たりの流入汚水量が多い汚水槽で
は、槽内に複数台のポンプを連設して汚水発生量が多い
時間帯に備えている。この場合、水位検出手段による検
出水位が第一水位に達すると一方のポンプを作動し、検
出水位が第一水位より高い第二水位に達すると複数のポ
ンプを作動するように制御することで、通常はポンプの
寿命を考慮して複数のポンプが同時に作動する頻度を抑
えていた。
2. Description of the Related Art Generally, in a pressure type sewage facility, there is a certain minimum flow velocity at which filth can be transported, for example, once a day, so that filth does not accumulate in the pipeline and become clogged. The pipe diameter and pump capacity are set so that they will appear in. In a sewage tank with a large amount of inflow sewage per hour, a plurality of pumps are connected in series in the tank to prepare for a time period when a large amount of sewage is generated. In this case, one pump is operated when the water level detected by the water level detection means reaches the first water level, and by controlling so that the plurality of pumps are operated when the detected water level reaches the second water level higher than the first water level, Normally, the frequency of simultaneous operation of multiple pumps was suppressed in consideration of the pump life.

【0003】[0003]

【発明が解決しようとする課題】上述の従来技術では、
管路内に堆積している汚物を搬送できる前記一定の最少
流速は、一方のポンプが単独で作動した場合に得られる
ように管径及びポンプ容量を設計していたために、同時
運転で最少流速を得るように設計する場合に比べてポン
プ容量が増加して経済性に劣るという欠点があった。そ
こで、両方のポンプが同時に作動した場合に最低流速が
得られるように管径及びポンプ容量を設計することが考
えられる。この場合には、設計上は、一定の確率の下で
最少流速がある頻度で確保できるように計算して管径及
びポンプ容量を決定するものと想定するのであるが、実
際には、汚水槽への流入汚水量は一定ではなく、季節や
曜日等により変動するものであるために、確実に最少流
速がある頻度で確保できるとは限らないものであるとい
う欠点がある。例えば、汚水槽への流入汚水量が少なく
て、検出水位が第一水位より高い第二水位に達すること
がないような場合である。本発明の目的は上述した従来
欠点を解消する点にある。
In the above-mentioned prior art,
The constant minimum flow rate that can convey the dirt accumulated in the pipeline is the minimum flow rate in simultaneous operation because the pipe diameter and pump capacity were designed so as to be obtained when one pump operates independently. There is a drawback that the pump capacity is increased and the economy is inferior as compared with the case of designing so as to obtain. Therefore, it is conceivable to design the pipe diameter and the pump capacity so that the minimum flow rate is obtained when both pumps are operated at the same time. In this case, in designing, it is assumed that the pipe diameter and pump capacity are determined by calculation so that the minimum flow velocity can be secured at a certain frequency with a certain probability. Since the amount of sewage inflowing into is not constant and varies depending on the season, day of the week, etc., there is a drawback that it is not always possible to ensure the minimum flow velocity at a certain frequency. For example, there is a case where the amount of sewage flowing into the sewage tank is small and the detected water level does not reach the second water level higher than the first water level. An object of the present invention is to eliminate the above-mentioned conventional drawbacks.

【0004】[0004]

【課題を解決するための手段】この目的を達成するた
め、本発明による圧力式下水施設用ポンプの設計方法の
特徴構成は、前記汚水槽に二台のポンプを設けて、所定
の周期で二台のポンプを同時に作動するように制御する
圧力式下水施設の設計方法であって、前記ポンプが同時
に作動する場合に最低流速を確保すべく前記管路の口径
を決定し、決定された口径の管路に対して摩擦損失を加
味して得られる全揚程から前記ポンプを選定する点にあ
る。又、本発明による圧力式下水施設用ポンプの制御方
法の特徴構成は、前記汚水槽に、貯溜汚水の水位を検出
する水位検出手段と、二台のポンプを設け、前記水位検
出手段による検出水位が第一水位に達すると一方のポン
プを作動し、検出水位が第一水位より高い第二水位に達
すると両方のポンプを作動するように制御する圧力式下
水施設の制御方法であって、前記水位検出手段による検
出水位が第一水位より低くとも、所定時間に一度は両方
のポンプを強制的に作動する点にある。さらに、前記水
位検出手段による検出水位が第一水位に達した場合であ
っても、所定時間に一度は何れのポンプの作動をも禁止
して、検出水位が第二水位に達すると両方のポンプを作
動するように制御する点にある。
In order to achieve this object, the characteristic construction of the method for designing a pump for a pressure type sewerage facility according to the present invention is that two pumps are provided in the waste water tank, and two pumps are installed at a predetermined cycle. A method of designing a pressure-type sewage facility that controls pumps to operate simultaneously, wherein the pipe diameter is determined to ensure a minimum flow rate when the pumps operate simultaneously, and The point is to select the pump from the total head obtained by adding friction loss to the pipeline. Further, the characteristic configuration of the control method of the pump for a pressure type sewage facility according to the present invention is that the wastewater tank is provided with a water level detecting means for detecting the water level of stored wastewater and two pumps, and the water level detected by the water level detecting means. Is a control method of the pressure type sewerage facility, which controls one pump when it reaches the first water level and controls both pumps when the detected water level reaches a second water level higher than the first water level, Even if the water level detected by the water level detecting means is lower than the first water level, both pumps are forcibly operated once at a predetermined time. Further, even when the water level detected by the water level detection means reaches the first water level, the operation of any pump is prohibited once at a predetermined time, and when the detected water level reaches the second water level, both pumps are prohibited. The point is to control to operate.

【0005】[0005]

【作用】本発明による圧力式下水施設用ポンプの設計方
法によれば、前記ポンプが同時に作動する場合に最低流
速を確保すべく前記管路の口径を決定するので、決定さ
れた口径の管路に対して摩擦損失を加味して得られる全
揚程から選定されたポンプのそれぞれの容量を小さく設
定できる。本発明による圧力式下水施設用ポンプの制御
方法によれば、水位検出手段による検出水位が第一水位
より低く、一方のポンプしか作動しない場合であって
も、所定時間に一度は両方のポンプを強制的に作動する
ことで、管路内に堆積している汚物を搬送できる一定の
最少流速を確実に得るのである。検出水位が第二水位よ
り低い場合に両方のポンプを強制的に作動するのではな
く、検出水位が第一水位に達した場合であっても、所定
時間に一度は何れのポンプの作動をも禁止してそのまま
汚水を流入させて検出水位が第二水位に達するのを待
ち、その後両方のポンプを作動させることにより、管路
内に堆積している汚物を搬送できる一定の最少流速を確
実に得ることもできる。
According to the method for designing a pump for a pressure type sewage facility according to the present invention, since the diameter of the pipeline is determined so as to ensure the minimum flow velocity when the pumps are simultaneously operated, the pipeline having the determined diameter is used. On the other hand, the respective pump capacities selected from the total head obtained by taking friction loss into consideration can be set small. According to the method for controlling a pump for a pressure type sewage facility according to the present invention, even if only one pump operates when the water level detected by the water level detection means is lower than the first water level, both pumps are operated once at a predetermined time. By forcibly operating, a certain minimum flow velocity that can convey the dirt accumulated in the pipeline can be surely obtained. Rather than forcibly operating both pumps when the detected water level is lower than the second water level, even if the detected water level reaches the first water level, both pumps are activated once at a predetermined time. Prohibit and let sewage flow in as it is, wait for the detected water level to reach the second water level, and then activate both pumps to ensure a certain minimum flow velocity that can convey the filth accumulated in the pipeline. You can also get it.

【0006】[0006]

【発明の効果】従って本発明によれば、圧力式の下水道
システムを、管路内に堆積している汚物を搬送できる一
定の最少流速が、両方のポンプを同時に作動した場合に
得られるように管径及びポンプ容量を設計するので、各
ポンプ容量が小さく、経済性に優れ、又、設定時間に一
度は確実にその最少流速を確保できる圧力式下水施設の
設計方法並びに制御方法を提供できるようになった。
According to the invention, therefore, a pressure-based sewer system is provided such that a constant minimum flow rate for transporting dirt accumulated in the pipeline is obtained when both pumps are operated simultaneously. Since the pipe diameter and the pump capacity are designed, it is possible to provide a design method and a control method for a pressure type sewerage facility, in which each pump capacity is small, it is economically efficient, and the minimum flow velocity can be reliably ensured once at a set time. Became.

【0007】[0007]

【実施例】以下に本発明の実施例を説明する。圧力式下
水処理施設は、図4に示すように、地中に埋設され、各
家庭からの発生汚水を貯溜する汚水槽2と、その汚水槽
2内の汚水を処理場(図示せず)に搬送する管路1と、
その汚水槽2に流入する汚水を前記管路1に圧送するポ
ンプ3,4とから構成してある。前記管路1は、処理場
に繋がる大口径の主管路1aとその主管路1aに樹枝状
に繋がる小口径の副管路1bとで構成してあり、副管路
1bの上流側の端部に前記ポンプ3,4の吐き出し口が
接続されている。
EXAMPLES Examples of the present invention will be described below. As shown in FIG. 4, the pressure type sewage treatment facility is buried in the ground and stores the wastewater generated from each household, and the wastewater in the wastewater tank 2 to a treatment plant (not shown). Pipeline 1 for transport,
It is composed of pumps 3 and 4 for pumping sewage flowing into the sewage tank 2 to the pipe line 1. The pipe line 1 is composed of a large-diameter main pipe line 1a connected to the treatment plant and a small-diameter sub-pipe line 1b connected to the main pipe line 1a in a dendritic manner, and an upstream end of the sub-pipe line 1b. The discharge ports of the pumps 3 and 4 are connected to.

【0008】前記汚水槽2は、図2に示すように、その
上部側壁に形成された汚水流入口に汚水流入管5を接続
してあり、ポンプの吐き出し口3a,4aを吐き出し用
の管路6及び仕切り弁7を介して前記副管路1bに接続
した遠心型のポンプ3,4を2台備えるとともに、それ
らポンプ3,4の作動水位を検出するエアパージ式等の
水位検出手段8を設けてある。また、前記ポンプ3,4
は、汚水中の汚物を破砕する破砕機構付きのポンプであ
る。
As shown in FIG. 2, the sewage tank 2 has a sewage inflow pipe 5 connected to a sewage inflow port formed on the upper side wall thereof, and a line for discharging the discharge ports 3a, 4a of the pump. 6 and two centrifugal pumps 3 and 4 connected to the auxiliary conduit 1b via a partition valve 7 and an air purge type water level detecting means 8 for detecting the operating water levels of the pumps 3 and 4 are provided. There is. Also, the pumps 3, 4
Is a pump with a crushing mechanism that crushes the waste in the wastewater.

【0009】前記水位検出手段8は、ポンプの作動を停
止する停止水位LWLと、停止水位LWLより高く何れ
か一方のみのポンプを作動させる第一水位HWL1と、
第一水位HWL1より高く両方のポンプを作動させる第
二水位HWL2と、第二水位HWL2より高く警報を発
する警報水位HHWLの4水位を検出する。
The water level detecting means 8 has a stop water level LWL for stopping the operation of the pump, and a first water level HWL1 for operating only one pump higher than the stop water level LWL,
Four water levels are detected: a second water level HWL2 higher than the first water level HWL1 and operating both pumps, and an alarm water level HHWL higher than the second water level HWL2 and issuing an alarm.

【0010】前記汚水槽2の近傍に前記水位検出手段8
による検出水位に基づき前記ポンプ3,4の作動を制御
する制御手段9を設けてある。以下、前記制御手段9に
よるポンプの運転制御を、図1に示すタイミングチャー
ト及び図3に示すフローチャートに基づき説明する。水
位検出手段8による検出水位が第一水位HWL1であれ
ば<#1>、通常はポンプを作動させる<#3>(図1
におけるC点、D点)のであるが、過去24時間以内に
ポンプが同時に作動した時期が無ければ<#2>(図1
におけるA点)、ポンプを作動せずに第二水位HWL2
を待ち、第二水位HWL2に達すると<#4>、ポンプ
を2台とも同時に作動する<#5>(図1におけるB
点、E点)。検出水位が警報水位HHWLに達すれば<
#6>、制御手段9に設けたブザーによる警報手段を作
動させ<#7>、汚水が圧送されて検出水位が停止水位
LWLに下がると<#8>、ポンプを停止する<#9
>。尚、ステップ<#3>において、ポンプは交互に作
動させるように制御することでポンプ寿命を考慮してあ
る。
The water level detecting means 8 is provided in the vicinity of the dirty water tank 2.
Control means 9 is provided for controlling the operation of the pumps 3 and 4 based on the detected water level. The operation control of the pump by the control means 9 will be described below with reference to the timing chart shown in FIG. 1 and the flowchart shown in FIG. If the water level detected by the water level detection means 8 is the first water level HWL1 <# 1>, the pump is normally operated <# 3> (FIG. 1).
C points and D points in Fig. 1), but if there is no time when the pumps are simultaneously operated within the last 24 hours, <# 2> (Fig. 1).
Point A), the second water level HWL2 without operating the pump
, And when the second water level HWL2 is reached <# 4>, both pumps are activated simultaneously <# 5> (B in FIG. 1).
Point, E point). If the detected water level reaches the alarm water level HHWL <
# 6>, the alarm means by the buzzer provided in the control means 9 is activated <# 7>, and when the detected water level is lowered to the stop water level LWL by pumping dirty water <# 8>, the pump is stopped <# 9>
>. In step <# 3>, the pump life is taken into consideration by controlling the pumps to operate alternately.

【0011】上述の圧力式下水施設の設計方法について
説明すると、図5に示すように、先ず、前記汚水槽2に
流入する1時間当たりの最大汚水量を、同時作動する2
台のポンプ3,4を用いて1回当たり2、3分の時間で
1時間当たり約10回の作動回数で圧送する場合を基準
に、前記管路1に圧送するための基礎吐き出し量を求め
<#1>、基礎全揚程を算出する<#2>。前記基礎全
揚程における吐き出し量が前記基礎吐き出し量を下回ら
ないポンプ3,4を選定し<#3>、選定されたポンプ
3,4からの吐き出し量等、前記管路1に流入する全汚
水量に対して最小流速を確保できる管口径を決定する<
#4>。決定された管口径の管路1に対して、ヘーゼン
ウィリアム式を用いて損失水頭、総水頭を導出して<#
5>,<#6>、ポンプ3,4からの吐き出し量を算出
する<#7>。ステップ<#7>で算出された吐き出し
量が基礎吐き出し量とほぼ等しければ本ポンプ3,4を
使用して、そうでなければステップ<#3>に戻りポン
プを1ランク大型に設定して同様の処理を繰り返す<#
8>。
A method of designing the above-mentioned pressure type sewage facility will be described. As shown in FIG. 5, first, the maximum amount of sewage flowing into the sewage tank 2 per hour is simultaneously operated.
Based on the case where pumps 3 and 4 are used to pump at a rate of about 10 times per hour for a few minutes per operation, the basic discharge amount for pumping to the pipeline 1 is obtained. <# 1>, calculating the basic total lift <# 2>. The total amount of wastewater flowing into the pipe line 1 such as the discharge amount from the selected pumps 3 and 4 is selected by selecting the pumps 3 and 4 in which the discharge amount in the basic total head is not less than the basic discharge amount <# 3>. Determine the pipe diameter that ensures the minimum flow velocity
# 4>. For the pipeline 1 with the determined pipe diameter, the head loss and total head are derived using the Hazen-William formula.
5>, <# 6>, and the discharge amounts from the pumps 3, 4 are calculated <# 7>. If the discharge amount calculated in step <# 7> is almost equal to the basic discharge amount, use the pumps 3 and 4; otherwise, return to step <# 3> and set the pump to one rank larger Repeat the process of <
8>.

【0012】以下に別実施例を説明する。先の実施例で
は、ポンプの容量について特に指定していないが双方が
等しいものでなくともよい。
Another embodiment will be described below. In the above embodiment, the pump capacities are not specified, but they may not be equal.

【0013】尚、特許請求の範囲の項に図面との対照を
便利にする為に符号を記すが、該記入により本発明は添
付図面の構成に限定されるものではない。
It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

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

【図1】タイミングチャートFIG. 1 Timing chart

【図2】汚水槽の断面図[Figure 2] Cross-sectional view of the waste water tank

【図3】フローチャートFIG. 3 Flow chart

【図4】圧力式下水処理施設の構成図[Figure 4] Configuration diagram of pressure type sewage treatment facility

【図5】フローチャートFIG. 5: Flow chart

【符号の説明】[Explanation of symbols]

1 管路 2 汚水槽 3,4 ポンプ 1 Pipeline 2 Sewage tank 3, 4 Pump

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 汚水槽(2)と、汚水を処理場に搬送す
る管路(1)と、前記汚水槽(2)に流入する汚水を前
記管路(1)に圧送するポンプとから構成してある圧力
式下水施設において、 前記汚水槽(2)に複数台のポンプ(3),(4)を設け
て、所定の周期で少なくとも二台のポンプ(3),(4)
を同時に作動するように制御する圧力式下水施設の設計
方法であって、 少なくとも2台のポンプ(3),(4)が同時に作動する
場合に最低流速を確保すべく前記管路(1)の口径を決
定し、決定された口径の管路(1)に対して摩擦損失を
加味して得られる全揚程から前記ポンプ(3),(4)を
選定する圧力式下水施設の設計方法。
1. A sewage tank (2), a pipeline (1) for transporting sewage to a treatment plant, and a pump for pumping sewage flowing into the sewage tank (2) to the pipeline (1). In a pressure type sewage facility which is provided, a plurality of pumps (3), (4) are provided in the wastewater tank (2), and at least two pumps (3), (4) are provided at a predetermined cycle.
A method for designing a pressure-type sewer system that controls so that the pipes (1) of the pipe (1) are secured to ensure a minimum flow rate when at least two pumps (3), (4) are operated simultaneously. A method for designing a pressure-type sewage facility, which determines a diameter, and selects the pumps (3), (4) from the total head obtained by adding friction loss to the pipeline (1) having the determined diameter.
【請求項2】 汚水槽(2)と、汚水を処理場に搬送す
る管路(1)と、前記汚水槽(2)に流入する汚水を前
記管路(1)に圧送するポンプとから構成してある圧力
式下水施設において、 前記汚水槽(2)に、貯溜汚水の水位を検出する水位検
出手段(8)と、二台のポンプ(3),(4)を設け、前
記水位検出手段(8)による検出水位が第一水位に達す
ると一方のポンプを作動し、検出水位が第一水位より高
い第二水位に達すると両方のポンプを作動するように制
御する圧力式下水施設の制御方法であって、 前記水位検出手段(8)による検出水位が第一水位より
低くとも、所定時間に一度は両方のポンプを強制的に作
動する圧力式下水施設の制御方法。
2. A waste water tank (2), a pipeline (1) for transporting the waste water to a treatment plant, and a pump for pumping the waste water flowing into the waste water tank (2) to the pipeline (1). In the existing pressure type sewage facility, the waste water tank (2) is provided with a water level detecting means (8) for detecting the water level of stored waste water and two pumps (3), (4), and the water level detecting means is provided. Control of a pressure-type sewer facility that controls one pump when the water level detected by (8) reaches the first water level, and operates both pumps when the detected water level reaches a second water level higher than the first water level. A method for controlling a pressure type sewerage facility, wherein both pumps are forcibly operated once at a predetermined time even if the water level detected by the water level detection means (8) is lower than the first water level.
【請求項3】 汚水槽(2)と、汚水を処理場に搬送す
る管路(1)と、前記汚水槽(2)に流入する汚水を前
記管路(1)に圧送するポンプとから構成してある圧力
式下水施設において、 前記汚水槽(2)に、貯溜汚水の水位を検出する水位検
出手段(8)と、二台のポンプ(3),(4)を設け、前
記水位検出手段(8)による検出水位が第一水位に達す
ると一方のポンプを作動し、検出水位が第一水位より高
い第二水位に達すると両方のポンプを作動するように制
御する圧力式下水施設の制御方法であって、 前記水位検出手段(8)による検出水位が第一水位に達
した場合であっても、所定時間に一度は何れのポンプの
作動をも禁止して、検出水位が第二水位に達すると両方
のポンプを作動するように制御する圧力式下水施設の制
御方法。
3. A sewage tank (2) and sewage are transported to a treatment plant.
The pipe (1) and the wastewater flowing into the wastewater tank (2).
Pressure composed of a pump for sending pressure to the storage conduit (1)
In a sewerage system, a water level detector for detecting the water level of stored wastewater is provided in the wastewater tank (2).
The output means (8) and two pumps (3), (4) are provided
The water level detected by the water level detection means (8) reaches the first water level.
Then, one of the pumps is activated and the detected water level is higher than the first water level.
Control to activate both pumps when the second water level is reached.
A method for controlling a pressure type sewerage facility, wherein the water level detected by the water level detection means (8) reaches a first water level.
Even if it does, which pump
It also prohibits the operation and both when the detected water level reaches the second water level.
Control of the pressure sewer system that controls the pumps of the
Way.
JP4240153A 1992-03-31 1992-09-09 Design method for pressure type sewage facility and control method Pending JPH05331902A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4240153A JPH05331902A (en) 1992-03-31 1992-09-09 Design method for pressure type sewage facility and control method

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP4-74918 1992-03-31
JP7491892 1992-03-31
JP4240153A JPH05331902A (en) 1992-03-31 1992-09-09 Design method for pressure type sewage facility and control method

Publications (1)

Publication Number Publication Date
JPH05331902A true JPH05331902A (en) 1993-12-14

Family

ID=13561247

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4240153A Pending JPH05331902A (en) 1992-03-31 1992-09-09 Design method for pressure type sewage facility and control method

Country Status (1)

Country Link
JP (1) JPH05331902A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001132084A (en) * 1999-11-05 2001-05-15 Asahi Tec Corp Pressure sewer system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001132084A (en) * 1999-11-05 2001-05-15 Asahi Tec Corp Pressure sewer system
JP4674929B2 (en) * 1999-11-05 2011-04-20 旭テック環境ソリューション株式会社 Pressure sewer system

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