JPS6345512B2 - - Google Patents
Info
- Publication number
- JPS6345512B2 JPS6345512B2 JP57092479A JP9247982A JPS6345512B2 JP S6345512 B2 JPS6345512 B2 JP S6345512B2 JP 57092479 A JP57092479 A JP 57092479A JP 9247982 A JP9247982 A JP 9247982A JP S6345512 B2 JPS6345512 B2 JP S6345512B2
- Authority
- JP
- Japan
- Prior art keywords
- pump
- pressure
- time
- water
- discharge pressure
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 9
- 238000007689 inspection Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 238000010586 diagram Methods 0.000 description 7
- 238000005086 pumping Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2205/00—Fluid parameters
- F04B2205/05—Pressure after the pump outlet
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Description
【発明の詳細な説明】
本発明は、ポンプ特に消火ポンプ装置の自動点
検装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic inspection device for pumps, especially fire pump devices.
一般にビルなどに使用されている消火装置は地
下に水槽を埋設し、火災発生時水槽内の水を消火
ポンプで、ビルの最上階まで揚水し、ビルの全階
に消火水を供給するようにしている。また消火ポ
ンプの吸込配管に空気が混入した場合、エアロツ
ク現象により、ポンプの揚水能力はいちじるしく
低下する。このため、この種装置では消火ポンプ
が水槽内の水をビルの最上階まで揚水できる能力
を維持しているか否かを点検する必要があり、実
例として一日一回ポンプの締切り運転が行われて
いる。 Generally, fire extinguishing systems used in buildings have a water tank buried underground, and when a fire occurs, the water in the tank is pumped up to the top floor of the building using a fire pump, supplying fire extinguishing water to all floors of the building. ing. Furthermore, if air gets mixed into the suction pipe of a fire pump, the water pumping capacity of the pump will be significantly reduced due to the aerodynamic phenomenon. For this reason, with this type of equipment, it is necessary to check whether the fire pump maintains the ability to pump the water in the water tank to the top floor of the building.As an example, the pump is run once a day. ing.
従来、この種装置としては、テスト動作時に消
火ポンプから吐出される水の圧力を圧力スイツチ
で検出し、消火ポンプによつて揚水が充分に行な
われているか否かを点検するようにしたものが知
られている。 Conventionally, this type of equipment uses a pressure switch to detect the pressure of water discharged from a fire pump during test operation, and checks whether or not the fire pump is pumping enough water. Are known.
しかしながら、ポンプの吐出圧を圧力スイツチ
により判断するものでは揚水不能となつた場合、
揚水不能がポンプのどのような原因で揚水不能で
あるのかまでは、判断できないのが現状である。
そして揚水不能の原因がポンプにあることが判断
されるとポンプを取外して分解点検する等のこと
が行われる。そしてそれがエアロツクの場合に再
組立時には生じないため実際の原因は分らずに無
駄な作業を行つてしまう場合がある。 However, if the pump's discharge pressure is determined by a pressure switch, if the water cannot be pumped,
At present, it is not possible to determine the cause of the pump's inability to pump water.
If it is determined that the pump is the cause of the inability to pump water, the pump is removed and disassembled for inspection. In the case of aerodynamics, this does not occur during reassembly, so unnecessary work may be performed without knowing the actual cause.
本発明はポンプに圧力検出手段を備え、ポンプ
吐出圧力の時間変化を検出することによつて揚水
不能の原因がエアロツク現象によるものであるか
否かを判断し、通常の揚水不能と見わけられる高
精度の点検能力を有するポンプ装置の自動点検装
置を提供することを目的とするものである。 In the present invention, the pump is equipped with a pressure detection means, and by detecting changes in pump discharge pressure over time, it is possible to determine whether or not the cause of the inability to pump water is due to an aerodynamic phenomenon, thereby distinguishing it from a normal inability to pump water. The object of the present invention is to provide an automatic inspection device for a pump device that has a highly accurate inspection ability.
本発明はポンプの吐出圧力をテスト作動させる
装置をもち、ポンプ作動時の圧力の大きさに対応
した検出信号を得る検出手段と、前記圧力検出手
段を所定の時間間隔で作動させるタイマーを備え
たポンプ装置において、該圧力の大きさに対応し
た検出信号を受けてポンプ起動時から所定の時間
に圧力低下があるか否かを判断し、エアロツクで
あることを示す圧力低下値よりも大きい値の圧力
低下があつた場合に信号を発生する制御回路を具
備してなることを特徴とするポンプ装置の自動点
検装置である。 The present invention has a device for testing and operating the discharge pressure of a pump, and includes a detection means for obtaining a detection signal corresponding to the magnitude of the pressure when the pump is operated, and a timer for operating the pressure detection means at predetermined time intervals. In the pump device, upon receiving a detection signal corresponding to the magnitude of the pressure, it is determined whether or not there is a pressure drop within a predetermined time from the time the pump is started, and a pressure drop value greater than the pressure drop value indicating an aerodynamic condition is detected. This automatic inspection device for a pump device is characterized in that it is equipped with a control circuit that generates a signal when there is a pressure drop.
以下、本発明の実施例を図面により説明する。
第１図は本発明の実施例のブロツク図である。 Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram of an embodiment of the invention.
機台１上にポンプ２とポンプ２を駆動するモー
タ３が備えてあり、ポンプ２は受水槽４から吸込
管５にて水を汲み上げて吐出管６に昇圧吐出する
もので吐出管６からチエツキ弁７、仕切弁８を介
して例えば建物の屋上へ配管９がなされている。
ポンプ２には例えば圧力による電気抵抗変化形の
半導体のような圧力検出器１０がポンプ２の吐出
圧を計測するように取付けられている。圧力検出
器１０がポンプ２の吐出圧を検知して信号変換器
１１を介してＡ／Ｄ変換して制御回路１２へ信号
を送るようになつている。制御回路１２は後述す
るポンプの自動点検機能を備えるほか通常のモー
タの運転制御機能を有している。制御回路１２の
出力はモータ３に送られるようになつている。 A pump 2 and a motor 3 for driving the pump 2 are installed on the machine 1. The pump 2 pumps up water from a water tank 4 through a suction pipe 5 and discharges it to a discharge pipe 6 at increased pressure. A pipe 9 is connected to, for example, the roof of a building via a valve 7 and a gate valve 8.
A pressure detector 10, such as a semiconductor whose electric resistance changes depending on pressure, is attached to the pump 2 so as to measure the discharge pressure of the pump 2. A pressure detector 10 detects the discharge pressure of the pump 2, A/D converts it via a signal converter 11, and sends a signal to a control circuit 12. The control circuit 12 has a pump automatic inspection function, which will be described later, as well as a normal motor operation control function. The output of the control circuit 12 is sent to the motor 3.
第２図はエアロツク現象発生時ポンプを起動し
た時の、起動電流の変化、ポンプ吐出圧力の変化
を示す線図であつて横軸に時間、縦軸にモータの
入力電流、ポンプ吐出圧力を示す。図においてポ
ンプ２の締切り運転を行つた場合、符号１３はポ
ンプが正常なときの吐出圧力を示す曲線である。
モータ３をＴ１時間に起動すると起動電流１４は
急激に増加しモータ３のロータの慣性、自己誘
導、ポンプの抵抗に打克つて回転して一定速に達
した後定速度で回転する。ポンプ２は正常時吐出
圧力線１３の横線の高さP0の圧力となりその後
は一定の圧力P0を保つ。ポンプ自体が漏水、吸
水管抵抗の増大等の障害の場合は正常時吐出圧力
線１３の示す圧力よりも低い一定圧力となる。ポ
ンプ２を締切の運転をして時間Ｔ１において起動
するとポンプ２にエアロツク現象が起きている場
合曲線１５のようにポンプ吐出圧は変化する。吐
出圧力は時間TL後正常時吐出圧力P0よりも低い
圧力P1になつている。そしてポンプ２が圧力が
最大となつた時間Ｔ２より１〜２秒後に到るまで
次第に吐出圧力は低下して時間Ｔ３において圧力
P2となる。 Figure 2 is a diagram showing changes in starting current and changes in pump discharge pressure when the pump is started when an aerodynamic phenomenon occurs.The horizontal axis shows time, and the vertical axis shows motor input current and pump discharge pressure. . In the figure, when the pump 2 is in a shut-off operation, reference numeral 13 is a curve showing the discharge pressure when the pump is normal.
When the motor 3 is started at time T1, the starting current 14 increases rapidly, overcomes the inertia of the rotor of the motor 3, self-induction, and resistance of the pump, rotates, reaches a constant speed, and then rotates at a constant speed. During normal operation, the pump 2 reaches a pressure of P 0 at the height of the horizontal line of the discharge pressure line 13, and thereafter maintains a constant pressure P 0 . If the pump itself has a problem such as water leakage or increased water suction pipe resistance, the pressure will be constant, lower than the pressure indicated by the normal discharge pressure line 13. When the pump 2 is operated in a closed state and started at time T1, the pump discharge pressure changes as shown by curve 15 when an aerodynamic phenomenon occurs in the pump 2. After time TL, the discharge pressure becomes a pressure P1 lower than the normal discharge pressure P0 . Then, the discharge pressure gradually decreases until 1 to 2 seconds after the time T2 when the pump 2 reaches its maximum pressure, and at time T3 the pressure
It becomes P 2 .
第３図は制御回路１２のブロツク図である。モ
ータ３を起動すると起動信号発生器１６は時間Ｔ
２においてタイマー１７及びゲート１８に信号を
送り、記憶回路２１のゲート１８を開く。そして
タイマー１７をスタートさせると共にトリガーゲ
ート回路１９を開き圧力検出器１０はポンプ２の
時間Ｔ１における圧力信号をゲート１９を通じて
Ａ／Ｄ変換器２０に送り、Ａ／Ｄ変換してゲート
１８を通じて記憶回路２１に記憶される。時間Ｔ
後にタイマー１７はタイムアツプするから再びト
リガーゲート回路１９を開くので圧力P2の圧力
信号は圧力検出器１０からトリガーゲート回路１
９を通りＡ／Ｄ変換器２０でＡ／Ｄ変換されて演
算器２２に送られ、記憶回路２１の内容が呼出さ
れてP1−P2＝△Ｐが実行され、設定器２３に予
め設定されてある値よりも△Ｐが大きいと表示器
等の警報発生器２４に信号は送られ警告される。
或は演算器２２の該信号を増幅して第１図に二点
鎖線で示す如く、自動弁２５に送り、自動弁２５
を開いてポンプ２の吐出側に設けたバイパス管２
６から自動的にポンプ２の空気抜を行つてもよ
い。 FIG. 3 is a block diagram of the control circuit 12. When the motor 3 is started, the starting signal generator 16 outputs a time T.
2, a signal is sent to the timer 17 and the gate 18 to open the gate 18 of the memory circuit 21. Then, the timer 17 is started, the trigger gate circuit 19 is opened, and the pressure detector 10 sends the pressure signal of the pump 2 at time T1 to the A/D converter 20 through the gate 19, where it is A/D converted and passed through the gate 18 to the memory circuit. 21. time T
Later, the timer 17 times up, so the trigger gate circuit 19 is opened again, so the pressure signal of pressure P2 is transferred from the pressure detector 10 to the trigger gate circuit 1.
9, is A/D converted by the A/D converter 20 and sent to the arithmetic unit 22, the contents of the memory circuit 21 are called out, P 1 - P 2 = △P is executed, and the setting device 23 is set in advance. If ΔP is larger than a certain value, a signal is sent to an alarm generator 24 such as a display to issue a warning.
Alternatively, the signal from the computing unit 22 is amplified and sent to the automatic valve 25 as shown by the two-dot chain line in FIG.
Bypass pipe 2 opened and provided on the discharge side of the pump 2
The pump 2 may be automatically vented from step 6.
尚以上の説明はエアロツク時の圧力低下の圧力
の時間をおいた差を見るものであるが圧力の低下
する速度を検知するようにしてもよい。 Although the above explanation is based on the difference in the pressure drop over time during the aerodynamics, it is also possible to detect the speed at which the pressure decreases.
本発明は消火ポンプ自動点検装置の揚水能力の
チエツクにおいて、圧力検出に圧力検出器を用
い、ポンプ吐出圧力の時間的変化を検出できるよ
うにしたことによつて揚水不能の原因がエアロツ
クによるものか否かを判断できるようになり、空
気抜きを行つてポンプを正常な状態に保つことが
できる。 The present invention uses a pressure detector to detect pressure when checking the pumping capacity of a fire pump automatic inspection device, and detects temporal changes in the pump discharge pressure, thereby making it possible to determine whether the cause of pumping failure is due to aerodynamics. You can now determine whether or not the pump is working properly by venting air.
第１図は本発明の実施例のブロツク図、第２図
はポンプのエアロツク現象を説明する線図、第３
図は制御ブロツク図である。
１……機台、２……ポンプ、３……モータ、４
……受水槽、５……吸込管、６……吐出管、７…
…チエツキ弁、８……仕切弁、９……配管、１０
……圧力検出器、１１……信号変換器、１２……
制御回路、１３……正常時吐出圧力線、１４……
起動電流、１５……曲線、１６……起動信号発生
器、１７……タイマー、１８……ゲート、１９…
…トリガーゲート回路、２０……Ａ／Ｄ変換器、
２１……記憶回路、２２……演算器、２３……設
定器、２４……警報発生器、２５……自動弁、２
６……配管、P0……正常時吐出圧力、P1，P2…
…吐出圧力、Ｔ，Ｔ１，Ｔ２，Ｔ３……時間。
Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is a diagram explaining the aerodynamic phenomenon of the pump, and Fig. 3 is a diagram explaining the aerodynamic phenomenon of the pump.
The figure is a control block diagram. 1...Machine base, 2...Pump, 3...Motor, 4
...Water tank, 5...Suction pipe, 6...Discharge pipe, 7...
... Check valve, 8 ... Gate valve, 9 ... Piping, 10
...Pressure detector, 11...Signal converter, 12...
Control circuit, 13... Normal discharge pressure line, 14...
Starting current, 15... Curve, 16... Starting signal generator, 17... Timer, 18... Gate, 19...
...Trigger gate circuit, 20...A/D converter,
21... Memory circuit, 22... Arithmetic unit, 23... Setting device, 24... Alarm generator, 25... Automatic valve, 2
6...Piping, P0 ...Normal discharge pressure, P1 , P2 ...
...Discharge pressure, T, T1, T2, T3...time.
Claims (1)
もち、ポンプ作動時の圧力の大きさに対応した検
出信号を得る検出手段と、前記圧力検出手段を所
定の時間間隔で作動させるタイマーを備えたポン
プ装置において、該圧力の大きさに対応した検出
信号を受けてポンプ起動時から所定の時間に圧力
低下があるか否かを判断し、エアロツクであるこ
とを示す圧力低下値よりも大きい値の圧力低下が
あつた場合に信号を発生する制御回路を具備して
なることを特徴とするポンプ装置の自動点検装
置。1. A pump device having a device for testing the discharge pressure of a pump, a detection means for obtaining a detection signal corresponding to the magnitude of the pressure when the pump is operated, and a timer for operating the pressure detection means at predetermined time intervals. In response to a detection signal corresponding to the magnitude of the pressure, it is determined whether or not there is a pressure drop within a predetermined period of time from the time the pump is started, and the pressure drop is determined to be larger than the pressure drop value indicating an aerodynamic condition. An automatic inspection device for a pump device, characterized in that it is equipped with a control circuit that generates a signal when there is a problem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9247982A JPS58210387A (en) | 1982-05-31 | 1982-05-31 | Automatic inspection apparatus for pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9247982A JPS58210387A (en) | 1982-05-31 | 1982-05-31 | Automatic inspection apparatus for pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58210387A JPS58210387A (en) | 1983-12-07 |
| JPS6345512B2 true JPS6345512B2 (en) | 1988-09-09 |
Family
ID=14055439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9247982A Granted JPS58210387A (en) | 1982-05-31 | 1982-05-31 | Automatic inspection apparatus for pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58210387A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02112995U (en) * | 1989-02-22 | 1990-09-10 | ||
| DE60236823D1 (en) * | 2001-03-02 | 2010-08-05 | Waters Technologies Corp | Method and device for determining the presence or absence of a liquid leak |
| JP2008194118A (en) * | 2007-02-09 | 2008-08-28 | Chugoku Electric Power Co Inc:The | Power plant recovering air receiver drain trap by simple method |
| SE536920C2 (en) | 2010-06-21 | 2014-10-28 | Scania Cv Ab | SCR system for exhaust gas purification and method for cooling the metering unit in such an SCR system |
| SE535631C2 (en) * | 2010-06-21 | 2012-10-23 | Scania Cv Ab | Procedure for the presence of air in an HC dosing system and corresponding HC dosing system |
| SE535632C2 (en) | 2010-06-21 | 2012-10-23 | Scania Cv Ab | Procedure for the presence of air in liquid supply in an SCR system and corresponding SCR system |
| CN104131972B (en) * | 2014-08-14 | 2016-06-22 | 江苏凯德电控科技有限公司 | A kind of refrigerator feed pump tester |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS499701A (en) * | 1972-05-27 | 1974-01-28 |
-
1982
- 1982-05-31 JP JP9247982A patent/JPS58210387A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS499701A (en) * | 1972-05-27 | 1974-01-28 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58210387A (en) | 1983-12-07 |
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