JP3051492B2 - Pumping tube leak detection device - Google Patents
Pumping tube leak detection deviceInfo
- Publication number
- JP3051492B2 JP3051492B2 JP3099403A JP9940391A JP3051492B2 JP 3051492 B2 JP3051492 B2 JP 3051492B2 JP 3099403 A JP3099403 A JP 3099403A JP 9940391 A JP9940391 A JP 9940391A JP 3051492 B2 JP3051492 B2 JP 3051492B2
- Authority
- JP
- Japan
- Prior art keywords
- pump
- water
- pipe
- pumping
- pumping pipe
- 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.)
- Expired - Fee Related
Links
Landscapes
- Examining Or Testing Airtightness (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば土木建築現場の
仮設給水設備等における揚水管の水洩れ検出装置に関す
るものである。The present invention relates to, for example, those related to water leakage detection DeSo location of the riser pipe in temporary water supply facilities of civil engineering construction site.
【０００２】[0002]
【従来の技術】従来における給水ポンプの運転制御方法
を図２について述べると、揚水管２′内の圧力を圧力ス
イッチ６′により検知し、これをポンプのＯＮ−ＯＦＦ
指示信号に切り換えてその指示通りに給水ポンプ１′を
起動・停止する。2. Description of the Related Art A conventional operation control method of a water supply pump will be described with reference to FIG. 2. The pressure in a pumping pipe 2 'is detected by a pressure switch 6', and this is turned on and off of the pump.
Switching to the instruction signal, the water supply pump 1 'is started / stopped according to the instruction.
【０００３】圧力タンクＴを使用した上記従来の運転制
御方式では、ポンプ容量は計測給水値（最大値）で選定
される。しかし実際に最大給水量で運転されるケースは
極めて希である。そして実質的使用量が最大給水量より
も著しく少ない水洩れ状態の場合には、ポンプが起動と
停止を繰り返すことになる。In the conventional operation control system using the pressure tank T, the pump capacity is selected based on a measured water supply value (maximum value). However, it is extremely rare that the vehicle is actually operated with the maximum water supply. Then, in the case of a water leak state in which the actual usage amount is significantly smaller than the maximum water supply amount, the pump repeatedly starts and stops.
【０００４】[0004]
【発明が解決しようとする課題】特に土木建築現場の仮
設給水設備では、仮設配管の連結部における接合不完全
や、コックの締め方不完全などにより微少水量が消費さ
れ、また冬期には凍結防止のため故意にコックを弛めて
少量の水を通しておくことがあり、揚水管路が水洩れ状
態となっていることが多いため、停止条件附近において
ポンプの起動・停止を頻繁に繰り返して揚水管内の圧力
変動を起こし、これが長時間継続すればポンプモーター
の焼損、ポンプ内部の発熱、圧力スイッチの破損など多
くのトラブル発生に至るおそれもある。Particularly, in a temporary water supply system for a civil engineering construction site, a small amount of water is consumed due to an incomplete connection at a connecting portion of a temporary pipe or an incomplete tightening of a cock. For this reason, the cock may be intentionally loosened to allow a small amount of water to pass through, and the pumping line is often in a leaking state. If this pressure fluctuation continues for a long time, there is a possibility that many troubles such as burning of the pump motor, heat generation inside the pump, and damage to the pressure switch may occur.
【０００５】そして現状では、これらトラブルの要因と
なる水洩れを完全に防止することは殆ど不可能である。
尤も圧力タンクの容量を大きくすることにより、ポンプ
の起動・停止頻度を少なくすることは可能である。しか
し仮設の設備に大容量の圧力タンクを使用すれば、装置
そのものが大きくなって実用に即さず高価なものとな
る。従って給水設備においては、水洩れ現象を検出して
それに対応する手段を講ずることが必要不可欠である。At present, it is almost impossible to completely prevent water leakage which causes these troubles.
However, it is possible to reduce the frequency of starting and stopping the pump by increasing the capacity of the pressure tank. However, if a large-capacity pressure tank is used for temporary equipment, the size of the apparatus itself becomes large, making it unsuitable for practical use and expensive. Therefore, it is indispensable for the water supply equipment to detect a water leakage phenomenon and to take measures corresponding thereto.
【０００６】本発明の目的は、給水設備において大容量
の圧力タンクを必要とせず、更には圧力タンクを全く使
用することなく、現在不可避的なものとされている水洩
れによるチャタリング現象及びこれに起因するトラブル
を未然に防止することにある。なお、本明細暑中におい
て「水洩れ」とは、揚水管路途中からの意に反する水の
洩出のほか、故意に少量の水を通している場合を含め
た、微少水量使用の状態をいう。SUMMARY OF THE INVENTION It is an object of the present invention to provide a water supply system which does not require a large-capacity pressure tank, and furthermore, does not use a pressure tank at all. An object of the present invention is to prevent troubles caused by such problems. In this specification, “water leakage” refers to a state in which a small amount of water is used, including a case where a small amount of water is intentionally passed, in addition to an unexpected leakage of water from the middle of a pumping pipeline.
【０００７】[0007]
【問題を解決するための手段】本発明に係わる揚水管の
水洩れ検出装置においては、ポンプの吐出側より導出さ
れた揚水管に、その管内圧力が予め設定された一定圧力
以下においてポンプを起動させる可変圧力スイッチを装
着し、上記揚水管から分岐してポンプの吸込側へ接続ま
たは供液源へ直接導入された余水返送管に可変式２次流
量調整弁と、返送余水が一定の流量に達することにより
ポンプを停止させるフロースイッチとを装着し、且つ揚
水管内の圧力変動に応じてポンプのＯＮ−ＯＦＦ指示信
号が発せられるよう電気的に接続した。In the water leakage detecting apparatus of riser pipe according to the present invention, in order to solve the problems], a riser pipe that is derived from the discharge side of the pump, starting the pump the pipe pressure below a preset constant pressure A variable pressure switch is provided, and a variable secondary flow rate regulating valve is connected to the sewage return pipe branched from the pumping pipe and connected to the suction side of the pump or directly introduced to the liquid supply source. A flow switch for stopping the pump when the flow rate was reached was mounted, and electrically connected so that an ON / OFF instruction signal for the pump was issued according to the pressure fluctuation in the pumping pipe.
【０００８】そして上記ＯＮ−ＯＦＦ指示信号の切り換
わり頻度を指標としてその頻度が予め定められた一定値
以上であれば水洩れ等の微少水量使用状態としてポンプ
を連続運転させ、上記一定値よりも低く且つそれがＯＦ
Ｆ指示で止れば揚水管路内が完全にクローズ状態である
としてポンプを停止させ得るよう構成した。 The switching frequency of the ON-OFF instruction signal is used as an index, and if the frequency is equal to or more than a predetermined value , the pump is determined to be in a state of using a very small amount of water such as water leakage.
Is operated continuously, and it is lower than the above-mentioned fixed value and it is OF
If stopped at F instruction, the inside of the pumping line is completely closed
It was configured so that the pump could be stopped.
【０００９】[0009]
【実施例】以下実施例の図１により説明をする。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to FIG.
【００１０】１は給水用のポンプ、２はポンプ１の吐出
側より導出された揚水管、３は該揚水管２と分岐してポ
ンプ１の吐出側より供液源４へ導入された余水返送管、
５は急閉式逆止弁、６は可変圧力スイッチ、７は可変式
２次流量調整弁、８はフロースイッチ、９は先端バルブ
である。1 is a pump for supplying water, 2 is a pumping pipe drawn out from the discharge side of the pump 1, and 3 is a spillage branched from the pumping pipe 2 and introduced into the liquid supply source 4 from the discharge side of the pump 1. Return tube,
5 is a quick closing check valve, 6 is a variable pressure switch, 7 is a variable secondary flow control valve, 8 is a flow switch, and 9 is a tip valve.
【００１１】可変圧力スイッチ６の始動圧力、可変式２
次流量調整弁７の閉度及びフロースイッチ８の始動水量
を、それぞれ任意の値に設定し、揚水管２内の圧力を可
変圧力スイッチ６が検知してその設定値より低ければポ
ンプ１は起動し、供液源４の水は揚水管路を通って所定
の供給先へ送られる。先端バルブ９が閉の状態により揚
水管２内の圧力が上昇して可変式２次流量調整弁６の設
定条件になれば、余水返送管３を通って余水が供液源４
へ返送され始める。揚水管２内の圧力が更に上昇するの
に伴い返送余水の水量も増大するが、これがフロースイ
ッチ８の検知水量に達すれば数秒後にポンプ１は停止す
る。可変式２次流量調整弁７は圧力により余水流量を調
整することができるので、必要圧力に応じてフロースイ
ッチ８とのバランスをとることが可能となり、必要圧力
に応じた制御を行わせ得るのである。[0011] Starting pressure of the variable pressure switch 6, variable type 2
The degree of closing of the secondary flow control valve 7 and the amount of starting water of the flow switch 8 are respectively set to arbitrary values, and the pressure in the pumping pipe 2 is detected by the variable pressure switch 6. If the pressure is lower than the set values, the pump 1 is started. Then, the water of the liquid supply source 4 is sent to a predetermined supply destination through a pumping pipeline. When the pressure in the pumping pipe 2 rises due to the state in which the end valve 9 is closed and the setting condition of the variable secondary flow rate regulating valve 6 is reached, the sewage passes through the sewage return pipe 3 and the sewage is supplied to the supply source 4.
Begins to be sent back to. As the pressure in the pumping pipe 2 further increases, the amount of surplus return water also increases, but if this reaches the amount of water detected by the flow switch 8, the pump 1 stops after a few seconds. Since the variable secondary flow rate control valve 7 can adjust the residual water flow rate by the pressure, the variable secondary flow rate control valve 7 can balance with the flow switch 8 according to the required pressure, and can perform control according to the required pressure. It is.
【００１２】上記フロースイッチ８による余水流量の検
知は、ポンプ停止条件附近で行われるのであって、通常
運転時には余水返送管２内に通水を生じることはなく、
すべて揚水管路を通って所定の供給先へ送水される。The detection of the sewage flow rate by the flow switch 8 is performed near the pump stop condition, and no water flows through the sewage return pipe 2 during normal operation.
All water is sent to a predetermined supply destination through a pumping pipeline.
【００１３】本発明では、ポンプ停止条件附近において
その特性を発揮する。揚水管２内の圧力変動に応じてポ
ンプ１のＯＮ−ＯＦＦ指示信号が発せられるよう電気的
に接続しておき、そのＯＮ−ＯＦＦ切り換わり頻度を指
標としてポンプ停止の要否を判定する。In the present invention, the characteristics are exhibited near the pump stop condition. The pump 1 is electrically connected so as to emit an ON-OFF instruction signal in accordance with a pressure change in the pumping pipe 2, and the necessity of stopping the pump is determined using the ON-OFF switching frequency as an index.
【００１４】例えば一定時間内におけるＯＮ−ＯＦＦ指
示の切り換わり回数が、予め決定された一定値よりも低
く且つそれがＯＦＦ指示で止まれば、それは水洩れが生
じておらず揚水管路内が完全にクローズ状態であると判
断して、ポンプ１を停止させる。For example, if the number of times the ON-OFF instruction is switched within a certain period of time is lower than a predetermined value and stops at the OFF instruction, it means that no water leakage has occurred and the pumping line is completely closed. Is determined to be in the closed state, and the pump 1 is stopped.
【００１５】また、ＯＮ−ＯＦＦ切り換わり回数が上記
一定値以上であれば、それは水洩れ等いわゆる微少水量
使用状態であると判断してポンプ１を連続運転させる
が、一定時間（約２０分）経過後にＯＦＦ信号が出てお
れば一旦停止し、再び起動条件が発生しなければ、水は
全く使用されていない、水洩れは生じていないと判断し
てポンプ１は停止させておく。しかし上記一旦停止の後
もＯＮ−ＯＦＦ信号が反復して起これば、やはり水洩れ
が生じていると判断してポンプ１を連続運転に切り換え
るのである。If the number of times of ON-OFF switching is equal to or more than the above-mentioned fixed value, it is determined that a so-called very small amount of water is being used, such as water leakage, and the pump 1 is continuously operated. If the OFF signal is output after the lapse of time, the pump 1 is temporarily stopped, and if the starting condition is not generated again, it is determined that water is not used at all and that no water leakage has occurred, and the pump 1 is stopped. However, if the ON-OFF signal repeatedly occurs even after the above-mentioned temporary stop, it is also determined that water leakage has occurred and the pump 1 is switched to the continuous operation.
【００１６】このように本発明においては、揚水管２内
の圧力変動に伴うＯＮ−ＯＦＦ指示信号の切り換わり頻
度を指標としてポンプ１の運転・停止の要否を判定し、
水洩れの場合にはポンプ１を連続運転させ、水が全く使
用されていない場合にのみポンプ１を停止させるのであ
る。As described above, in the present invention, the necessity of operation / stop of the pump 1 is determined by using the switching frequency of the ON-OFF instruction signal accompanying the pressure fluctuation in the pumping pipe 2 as an index.
In the case of water leakage, the pump 1 is operated continuously, and the pump 1 is stopped only when no water is used.
【００１７】[0017]
【発明の効果】本発明によれば、チャタリングの原因と
なる水洩れを検知することができるので、大容量の圧力
タンクを必要とすることなく、更には圧力タンクを全く
使用することなしに、停止条件附近におけるポンプの起
動・停止頻度を少なくすることができ、チャタリングに
起因するポンプモーターの焼損、ポンプ内部の発熱、圧
力スイッチの破損など多くのトラブルを未然に予防し得
るという利点があり、特に土木建築現場の仮設給水設備
における揚水管の水洩れ検出方法及び装置として好適で
ある。According to the present invention, a water leak which causes chattering can be detected, so that a large-capacity pressure tank is not required, and further, without using a pressure tank at all. There is an advantage that the frequency of starting and stopping the pump near the stop condition can be reduced, and many troubles such as burnout of the pump motor due to chattering, heat generation inside the pump, breakage of the pressure switch can be prevented beforehand, In particular, the present invention is suitable as a method and an apparatus for detecting leakage of water from a pumping pipe in a temporary water supply system at a civil engineering construction site.
【図１】本発明水洩れ検出装置を備えた給水装置の管路
系統図である。FIG. 1 is a pipeline diagram of a water supply device provided with a water leak detection device according to the present invention.
【図２】従来における給水装置の管路系統図である。FIG. 2 is a pipeline system diagram of a conventional water supply device.
１ ポンプ ２ 揚水管 ３ 余水返送管 ４ 供液源 ６ 可変式圧力スイッチ ７ 可変式２次流量調整弁 ８ フロースイッチ DESCRIPTION OF SYMBOLS 1 Pump 2 Pumping pipe 3 Spillage return pipe 4 Liquid supply source 6 Variable pressure switch 7 Variable secondary flow control valve 8 Flow switch
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G01M 3/26 G01M 3/28 F04D 15/00 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) G01M 3/26 G01M 3/28 F04D 15/00
Claims (1)
管（２）に、その管内圧力が予め設定された一定圧力以
下においてポンプ（１）を起動させる可変圧力スイッチ
（６）を装着し、上記揚水管（２）から分岐してポンプ
（１）の吸込側へ接続または供液源（４）へ直接導入さ
れた余水返送管（３）に可変式２次流量調整弁（７）
と、返送余水が一定の流量に達することによりポンプ
（１）を停止させるフロースイッチ（８）とを装着し、
且つ揚水管（２）内の圧力変動に応じてポンプのＯＮ−
ＯＦＦ指示信号が発せられるよう電気的に接続し、該指
示信号の切り換わり頻度を指標としてその頻度が、予め
定められた一定値以上であれば水洩れ等の微少水量使用
状態としてポンプ（１）を連続運転させ、上記一定値よ
りも低く且つそれがＯＦＦ指示で止れば揚水管路内が完
全にクローズ状態であるとしてポンプ（１）を停止させ
得るよう構成したことを特徴とする、揚水管の水洩れ検
出装置。The pump (1) has a pumping pipe ( 2) led out from a discharge side of the pump (1).
Variable pressure switch to start pump (1) below
Attach (6), branch off from the pumping pipe (2) and pump
Connected to the suction side of (1) or introduced directly to the liquid supply source (4)
Variable secondary flow control valve (7) in drained sewage return pipe (3)
When the return sewage reaches a certain flow rate, the pump
Attach a flow switch (8) to stop (1),
In addition, the pump is turned ON- according to the pressure fluctuation in the pumping pipe (2).
Make an electrical connection so that an OFF instruction signal is
Using the switching frequency of the indicator signal as an index,
Uses a very small amount of water, such as water leaks, if it is over a specified value
The pump (1) is continuously operated as the state, and
The pumping line is complete
Stop pump (1) assuming that it is completely closed
Characterized by being configured to obtain, water riser pipe leakage detection
Output device .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3099403A JP3051492B2 (en) | 1991-04-03 | 1991-04-03 | Pumping tube leak detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3099403A JP3051492B2 (en) | 1991-04-03 | 1991-04-03 | Pumping tube leak detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04307343A JPH04307343A (en) | 1992-10-29 |
| JP3051492B2 true JP3051492B2 (en) | 2000-06-12 |
Family
ID=14246528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3099403A Expired - Fee Related JP3051492B2 (en) | 1991-04-03 | 1991-04-03 | Pumping tube leak detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3051492B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109731270A (en) * | 2018-08-15 | 2019-05-10 | 广东蓄能发电有限公司 | Fire fighting water system operational efficiency and water leakage defect state maintenance method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111255705B (en) * | 2020-01-15 | 2021-07-16 | 台州浙里泵业有限公司 | Self priming pump control system |
-
1991
- 1991-04-03 JP JP3099403A patent/JP3051492B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109731270A (en) * | 2018-08-15 | 2019-05-10 | 广东蓄能发电有限公司 | Fire fighting water system operational efficiency and water leakage defect state maintenance method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04307343A (en) | 1992-10-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |