JPH06179015A - Automatic air bleeding method in starting time of two stage booster type high pressure water supply system - Google Patents
Automatic air bleeding method in starting time of two stage booster type high pressure water supply systemInfo
- Publication number
- JPH06179015A JPH06179015A JP33312792A JP33312792A JPH06179015A JP H06179015 A JPH06179015 A JP H06179015A JP 33312792 A JP33312792 A JP 33312792A JP 33312792 A JP33312792 A JP 33312792A JP H06179015 A JPH06179015 A JP H06179015A
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- Prior art keywords
- pump
- automatic
- stage
- stage pump
- pressure
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は金属材料の熱間圧延にお
ける高圧水デスケーリング装置等に適用される２段ブー
スタ式高圧水供給システムのポンプ起動時の自動エアー
抜き方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic air bleeding method for starting a pump of a two-stage booster type high pressure water supply system applied to a high pressure water descaling device or the like in hot rolling of metallic materials.
【０００２】[0002]
【従来の技術】金属材料の熱間圧延における高圧水デス
ケーリング装置や各種の高圧水による洗浄装置、或は高
圧水ジェットによる物体の切断装置等においては、近
来、デスケーリングや洗浄、切断能力を向上させるため
に、高圧水の供給圧力が非常に高くなってきている。こ
のような装置の高圧水供給システムとして、ポンプを直
列２段に配列した例えば図２に示すような２段ブースタ
式のものが次の理由により使用されている。 （１）熱間圧延における高圧水デスケーリング装置は、
複数スタンドの粗圧延機の各スタンドの前や仕上げ圧延
機群の前、さらには仕上圧延スタンド間等に配置される
多数のデスケーリングヘッダを備えているが、設備費運
転費及び保守費の節減の観点から、これ等のヘッダの全
てを対象に或は幾つかのグループとして共通の高圧水供
給システムを設けるのが一般的である。2. Description of the Related Art High pressure water descaling devices for hot rolling of metal materials, various high pressure water cleaning devices, and high pressure water jet object cutting devices, etc. In order to improve, the supply pressure of high pressure water is becoming very high. As a high-pressure water supply system for such an apparatus, a two-stage booster type pump as shown in FIG. 2 in which pumps are arranged in two stages in series is used for the following reason. (1) The high pressure water descaling device for hot rolling is
It has a large number of descaling headers that are placed in front of each stand of the multi-stand rough rolling mill, in front of the finishing rolling mill group, and between finishing rolling stands, but it saves equipment costs and operating costs. From this point of view, it is common to provide a common high-pressure water supply system for all or some of these headers.
【０００３】この場合、熱間圧延機の全てのヘッダ或は
グループ内の全てのヘッダに同一圧力の高圧水を供給す
る必要は必ずしもなく、被圧延材の過冷却防止や高圧水
ポンプの設備費・運転費の節減を目的として、低圧・高
圧の２段階の水圧に分けて供給することが行われてい
る。また、仮に全てのヘッダに供給する圧力を従来より
も高めたい場合、既設の低圧力のポンプを廃棄して高圧
ポンプを新設するよりも、既設の低圧力のポンプを利用
し、その出側にもう一台のポンプを増設して圧力を上げ
る方が設備費節減の点から得策でもある。 （２）非常に高い圧力の高圧水を必要とする場合、技術
的に１段のポンプで対応しきれず、２段又はそれ以上の
ポンプを必要とする場合がある。In this case, it is not always necessary to supply high-pressure water of the same pressure to all the headers of the hot rolling mill or all the headers in the group, and it is necessary to prevent overcooling of the material to be rolled and the equipment cost of the high-pressure water pump.・ In order to reduce operating costs, water is supplied separately in two stages, low pressure and high pressure. If you want to increase the pressure supplied to all headers more than before, use the existing low-pressure pump instead of discarding the existing low-pressure pump and installing a new high-pressure pump. Increasing the pressure by adding another pump is also a good idea in terms of equipment cost savings. (2) When high-pressure water having a very high pressure is required, there is a case where one-stage pump cannot be technically sufficient and two or more stages of pumps are required.
【０００４】このような２段ブースタ式の高圧水供給シ
ステムにおいては、例えば図２の１段目ポンプ１、２段
目のポンプ２がともに停止した場合、２段目のポンプ２
のグランドパッキンからエアーが侵入したり、１段目ポ
ンプ１と２段目ポンプ２間の主管路９から分岐した低圧
水供給管路１２の末端の例えばデスケーリングヘッダ
（図示せず）からエアーが逆流して、１段目ポンプ１と
２段目ポンプ２の間の主管路９や２段目ポンプ２内に侵
入空気が滞留する。このような状態で１段目ポンプ１を
起動すると、ウォーターハンマー現象が発生し、ポンプ
間主管路９や２段目ポンプ２の破壊、損傷につながる恐
れがあるので、１段目ポンプ１の起動に際して上記の滞
留空気の排出すなわちエアー抜きを自動的に行う必要が
ある。In such a two-stage booster type high-pressure water supply system, for example, when both the first-stage pump 1 and the second-stage pump 2 in FIG. 2 are stopped, the second-stage pump 2
Air from the gland packing of the first stage pump 2 or from the end of the low pressure water supply line 12 branched from the main line 9 between the first stage pump 1 and the second stage pump 2, for example, a descaling header (not shown). The reverse flow causes the invading air to stay in the main pipeline 9 between the first-stage pump 1 and the second-stage pump 2 and the second-stage pump 2. When the first-stage pump 1 is started in such a state, a water hammer phenomenon occurs, which may lead to breakage and damage of the main pump line 9 and the second-stage pump 2. Therefore, the first-stage pump 1 is started. At this time, it is necessary to automatically discharge the accumulated air, that is, bleed the air.
【０００５】従って、この滞留空気のエアー抜きを行う
には、図２に示すように、２段目ポンプ２の吸込側の逆
Ｕ字型立上り配管８ａの頂部へエアー抜き管５ａとエア
ー抜き用自動弁５ｂを配置し、１段目ポンプ１の吐出圧
を設計上低圧とし、エアー抜き用自動弁５ｂを開いた後
２段目ポンプ停止状態の下に１段目ポンプ１を起動し２
段目ポンプ吸込側エアー抜き用自動弁５ｂをポンプ駆動
後一定時間経過後に閉じることにより実施する方法が採
られている。Therefore, in order to bleed the accumulated air, as shown in FIG. 2, the air bleeding pipe 5a and the air bleeding pipe 5a for bleeding air are provided to the top of the inverted U-shaped rising pipe 8a on the suction side of the second stage pump 2. The automatic valve 5b is arranged, the discharge pressure of the first-stage pump 1 is set to a low pressure by design, the automatic valve 5b for bleeding air is opened, and then the first-stage pump 1 is started under the second-stage pump stop state.
A method is employed in which the automatic pump 5b for air bleeding on the suction side of the stage pump is closed after a lapse of a certain time after driving the pump.
【０００６】[0006]
【発明が解決しようとする課題】しかしこのように、２
段目ポンプ吸込側エアー抜き用自動弁５ｂのみから２段
目ポンプ内のエアーを抜く方法では、２段目ポンプ吐出
側に、通常吐出側管路の末端の例えば、デスケーリング
ヘッダから浸入する空気の逆流防止のために設けられる
逆Ｕ字形の立上り配管８ｂに溜るエアーを排出できない
という欠点がある。However, as described above, 2
In the method of bleeding the air in the second-stage pump from only the automatic valve 5b for the air-bleeding on the suction side of the second-stage pump, the air that enters the discharge side of the second-stage pump from the end of the normal discharge-side pipeline, for example, the descaling header However, there is a drawback that the air accumulated in the reverse U-shaped rising pipe 8b provided to prevent the backflow cannot be discharged.
【０００７】また、高圧水でエアー抜きを行うとウォー
ターハンマー現象が発生するため、低圧水でエアー抜き
を行う必要があり、１段目ポンプの吐出圧は設計上高く
できないという欠点がある。さらに、１段目ポンプを起
動して所定時間経過後に２段目ポンプ吸込側エアー抜き
用自動弁５ｂを閉じる方法では、１段目ポンプ本体の故
障その他の何らかの原因で１段目ポンプからの送水が行
われなかったり、送水速度が低下したりした場合、十分
なエアー抜きができない恐れがあり、また、十分なエア
ー抜きを行うために、１段目ポンプの起動開始から吸込
側エアー抜き用自動弁５ｂの閉止までの時間を、安全を
考慮して長くとる必要があり、ポンプの起動に必要以上
の時間を要するという問題がある。Further, when air is deflated with high pressure water, a water hammer phenomenon occurs. Therefore, it is necessary to bleed air with low pressure water, and there is a drawback in that the discharge pressure of the first-stage pump cannot be set high. Furthermore, in the method of starting the first-stage pump and closing the second-stage pump suction-side air bleeding automatic valve 5b after a lapse of a predetermined time, the first-stage pump supplies water due to a failure of the first-stage pump body or some other cause. If it is not performed or the water supply speed is reduced, it may not be possible to perform sufficient air bleeding.In addition, in order to perform sufficient air bleeding, the automatic suction side air bleeding from the start of the first stage pump It is necessary to take a long time to close the valve 5b in consideration of safety, and there is a problem that it takes more time than necessary to start the pump.
【０００８】本発明は、従来技術の問題点を解決した、
２段ブースタ式高圧水供給システムのポンプ起動時の自
動エアー抜き方法を提供することを課題とするものであ
る。The present invention solves the problems of the prior art,
It is an object of the present invention to provide an automatic air bleeding method when starting a pump of a two-stage booster type high pressure water supply system.
【０００９】[0009]
【課題を解決するための手段】本発明は上述の問題点を
解決するもので、２段目ポンプの吸込側逆Ｕ字型管路に
エアー抜き弁を備えた２段ブースタ式高圧水供給システ
ムのポンプ起動時の自動エアー抜き方法に適用され、次
の方法を採った。すなわち、１段目ポンプの吐出側に該
ポンプの吐出圧を検出する検出手段を設け、また、該検
出手段の後流の１段目・２段目ポンプ間の主管路に該主
管路の自動遮断弁及び該自動遮断弁をバイパスするよう
に１段目ポンプの吐出圧の減圧手段をそれぞれ設けると
共に２段目ポンプの吐出側逆Ｕ字型管路にエアー抜き弁
を設けておき、２段目ポンプの吸込側・吐出側逆Ｕ字型
管路の両エアー抜き弁を開とすると共に該自動遮断弁を
閉として該主管路に該減圧手段を介在させた後、１段目
ポンプを起動させて該減圧手段を介した低圧水により該
主管路及び該各管路内のエアー抜きを行い、該検出手段
で１段目ポンプの吐出圧が設定値となっていることを確
認して所定の時間径過後該両エアー抜き弁を閉とすると
共に該自動遮断弁を開とすることを特徴とする２段ブー
スタ式高圧水供給システムのポンプ起動時の自動エアー
抜き方法である。SUMMARY OF THE INVENTION The present invention solves the above problems and is a two-stage booster type high pressure water supply system having an air bleeding valve in the reverse U-shaped conduit on the suction side of the second stage pump. It was applied to the automatic air bleeding method when the pump was started, and the following method was adopted. That is, detection means for detecting the discharge pressure of the first-stage pump is provided on the discharge side, and the main pipeline is automatically connected to the main pipeline between the first-stage and second-stage pumps downstream of the detection means. A shutoff valve and a means for reducing the discharge pressure of the first-stage pump are provided so as to bypass the automatic shut-off valve, and an air vent valve is provided in the reverse U-shaped conduit on the discharge side of the second-stage pump, and the second-stage pump is provided. After opening both air bleeding valves of the suction side and discharge side inverted U-shaped pipes of the eye pump and closing the automatic shutoff valve to interpose the pressure reducing means in the main pipe, the first stage pump is started. Then, air is removed from the main pipeline and each pipeline by low-pressure water that has passed through the decompression means, and the detection means confirms that the discharge pressure of the first-stage pump is at a set value After both times, the both air vent valves should be closed and the automatic shutoff valve should be opened. An automatic air vent method during pump start of the two-stage booster type high-pressure water supply system for the symptoms.
【００１０】[0010]
【作用】本発明によれば、２段ブースタ式高圧水供給シ
ステムのポンプ起動時の自動エアー抜き方法において、
ポンプ間主管路に自動遮断弁を設け、この自動遮断弁を
閉じた状態でこの自動遮断弁を迂回するバイパス回路に
設けられた減圧オリフィスによって減圧された低圧水に
よりエアー抜きを行うのでウォーターハンマー現象の発
生が防止でき、２段目ポンプや、ポンプ間管路、エアー
抜き用枝管及びエアー抜き用自動弁の破損が防止できる
と共に、２段目ポンプの必要吐出圧力に応じて、１段目
用ポンプの吐出圧を高く設計でき、全体として効率の良
い高圧水供給システムの構成が可能になる。According to the present invention, in the automatic air bleeding method when starting the pump of the two-stage booster type high pressure water supply system,
An automatic shutoff valve is installed in the main line between pumps, and when this automatic shutoff valve is closed, air is bleeded by the low pressure water depressurized by the depressurization orifice provided in the bypass circuit that bypasses this automatic shutoff valve. Can be prevented, damage to the second-stage pump, the inter-pump line, the air-bleeding branch pipe, and the air-bleeding automatic valve can be prevented, and the first-stage pump can be used depending on the required discharge pressure of the second-stage pump. The discharge pressure of the pump can be designed to be high, and an efficient high-pressure water supply system can be configured as a whole.
【００１１】また、本発明によれば２段目ポンプの吸込
側、吐出側の両方に設けられた管路侵入空気逆流防止用
の逆Ｕ字型管路の頂部にそれぞれエアー抜き配管とエア
ー抜き用自動弁を設けて、両方からエアー抜きするよう
にしたので、ポンプ間管路は勿論のこと２段目ポンプ内
及び２段目ポンプ吐出側逆Ｕ字型管路内のエアー抜きも
十分に行うことができる。Further, according to the present invention, an air bleed pipe and an air bleed pipe are respectively provided at the tops of the inverted U-shaped pipe lines for preventing the backflow of the air flowing in the pipe lines provided on both the suction side and the discharge side of the second stage pump. Since an automatic valve was installed to bleed air from both sides, sufficient air bleeding is possible not only between the pump lines but also in the second-stage pump and the reverse U-shaped line on the discharge side of the second-stage pump. It can be carried out.
【００１２】さらに本発明によれば１段目ポンプの吐出
側に圧力スイッチを設け、この圧力スイッチで１段目ポ
ンプの吐出圧が所定の圧力に達してから一定時間経過後
に、２段目ポンプの吸込側および吐出側エアー抜き用自
動弁を閉じるようにしたから、１段目ポンプが正常な場
合は必要最短時間でエアー抜きが完了し、２段ブースタ
式高圧水供給システムの起動所要時間を最短に抑えるこ
とができる。Further, according to the present invention, a pressure switch is provided on the discharge side of the first-stage pump, and after a lapse of a fixed time after the discharge pressure of the first-stage pump reaches a predetermined pressure by the pressure switch, the second-stage pump Since the suction side and discharge side air bleeding automatic valves are closed, the air bleeding is completed in the shortest necessary time when the first-stage pump is normal, and the start-up time of the two-stage booster type high-pressure water supply system is reduced. It can be minimized.
【００１３】仮に１段目ポンプ本体の故障その他の原因
により、１段目ポンプからの送水が行われなかったり、
送水速度が遅い場合でも、圧力スイッチによってそれが
検出されるので、従来のような、１段目ポンプ起動（す
なわち、ポンプ駆動用モータの運転開始）後一定時間経
過してからエアー抜き用自動弁を閉じる方法では、十分
なエアー抜きが行われない状態でエアー抜き用自動弁を
閉として２段目ポンプを起動してしまったり、そのため
管路に滞留したエアーによりエアーハンマーをが発生す
るということが間々あったが、このような操業上の問題
が防止されるようになった。[0013] Temporarily, due to a failure of the main body of the first-stage pump or other reasons, water may not be sent from the first-stage pump,
Even if the water supply speed is slow, it is detected by the pressure switch, so the automatic air bleeding valve is operated after a certain period of time has passed after the first-stage pump startup (that is, the operation of the pump drive motor starts), as in the past. In the method of closing, the automatic valve for air bleeding is closed and the second-stage pump is started when sufficient air bleeding is not performed, so that air hammer is generated by the air accumulated in the pipeline. However, such operational problems have been prevented.
【００１４】[0014]
【実施例】図１は本発明方法を好適に実施することので
きる装置の一実施例の系統説明図である。１は１段目ポ
ンプ、２は２段目ポンプ、３はポンプ間主管路９に配設
した自動遮断弁、４は自動遮断弁３を迂回するように設
けられたバイパス管路１０に配設した減圧オリフィス、
５ａ、５ｂは２段目ポンプ吸込側の逆Ｕ字配管８ａの頂
部に配設したエアー抜き管およびエアー抜き用自動弁、
６ａ、６ｂは２段目ポンプ吐出側の逆Ｕ字配管８ｂの頂
部に配設したエアー抜き管およびエアー抜き用自動弁、
７は１段目ポンプ吐出圧を検出する圧力スイッチを示
す。また、１１は、２段目ポンプ吐出側から高圧側デス
ケーリングヘッダへの高圧水供給管路、１２は１段目ポ
ンプの吐出側から分岐した低圧側デスケーリングヘッダ
への低圧水供給管路である。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a system diagram of an embodiment of an apparatus capable of suitably carrying out the method of the present invention. Reference numeral 1 is a first-stage pump, 2 is a second-stage pump, 3 is an automatic shutoff valve provided in the inter-pump main pipeline 9, 4 is provided in a bypass pipeline 10 provided so as to bypass the automatic shutoff valve 3. Decompressed orifice,
5a and 5b are an air vent pipe and an automatic air vent valve provided on the top of the inverted U-shaped pipe 8a on the suction side of the second stage pump,
6a and 6b are an air vent pipe and an automatic valve for venting air, which are arranged on the top of the inverted U-shaped pipe 8b on the discharge side of the second stage pump.
Reference numeral 7 denotes a pressure switch for detecting the discharge pressure of the first stage pump. Further, 11 is a high pressure water supply pipeline from the discharge side of the second stage pump to the high pressure side descaling header, and 12 is a low pressure water supply pipeline to the low pressure side descaling header branched from the discharge side of the first stage pump. is there.
【００１５】１段目ポンプの吐出圧１００ｋｇ／ｃｍ
2 、吐出量７．２ｍ3 ／ｍｉｎ、４の減圧オリフィスの
減圧量９２ｋｇ／ｃｍ2 、流量０．４ｍ3 ／ｍｉｎとし
たとき、自動弁５ｂ、６ｂを開および自動遮断弁３を閉
とし、２段目ポンプ２を停止のまま１段目ポンプ１を運
転し、エアー抜きを実施した。その結果、圧力スイッチ
７が９０ｋｇ／ｃｍ2 で作動後約９０秒後、ウォーター
ハンマーの発生なく自動弁５ｂ、６ｂより完全にエアー
を抜くことができた。これより、圧力スイッチ７を作動
後９０秒以上経過後、自動弁５ｂ、６ｂを閉とすること
により自動エアー抜きを行うことができる。Discharge pressure of the first-stage pump 100 kg / cm
2 , when the discharge amount was 7.2 m 3 / min, the pressure reduction amount of the pressure reducing orifice was 4 kg of 92 cm / cm 2 , and the flow rate was 0.4 m 3 / min, the automatic valves 5b and 6b were opened and the automatic shutoff valve 3 was closed. The first-stage pump 1 was operated while the second-stage pump 2 was stopped to bleed air. As a result, about 90 seconds after the pressure switch 7 was operated at 90 kg / cm 2 , the automatic valves 5b and 6b were able to completely bleed air without the occurrence of water hammer. As a result, automatic bleeding can be performed by closing the automatic valves 5b and 6b 90 seconds or more after the pressure switch 7 is activated.
【００１６】なお、この実施例では、１段目ポンプ１の
吐出圧・吐出量、減圧オリフィス４の減圧量・流量、圧
力スイッチ７の設定値の１例について述べたが他の設定
値でも適用できるのは勿論である。In this embodiment, one example of the discharge pressure / discharge amount of the first-stage pump 1, the pressure reduction amount / flow rate of the pressure reducing orifice 4, and the set value of the pressure switch 7 has been described, but other set values are also applicable. Of course you can.
【００１７】[0017]
【発明の効果】本発明によれば、２段ブースタ式高圧水
供給システムのポンプ起動時における、ポンプ間管路、
２段目ポンプ内および２段目ポンプ吸込側・吐出側の逆
流防止用逆Ｕ字型管路内のエアー抜きをウォーターハン
マー現象の生じない低圧水で、必要最短時間内で確実に
行うことができる。また、１段目ポンプの吐出圧を２段
目ポンプの必要吐出圧に応じて高く設計できシステム全
体として効率の良い高圧水供給システムの構成が可能と
なる。EFFECTS OF THE INVENTION According to the present invention, a line between pumps at the time of starting a pump of a two-stage booster type high pressure water supply system,
It is possible to reliably remove the air inside the second-stage pump and the reverse U-shaped conduit for backflow prevention on the suction side and the discharge side of the second-stage pump with low-pressure water that does not cause the water hammer phenomenon within the necessary minimum time. it can. In addition, the discharge pressure of the first-stage pump can be designed to be high in accordance with the required discharge pressure of the second-stage pump, and it is possible to configure an efficient high-pressure water supply system as a whole system.
【図１】本発明を好適に実施することのできる装置の一
実施例の系統説明図である。FIG. 1 is a system explanatory view of an embodiment of an apparatus capable of suitably implementing the present invention.
【図２】従来の高圧水供給システムの構成の一例を示す
系統説明図である。FIG. 2 is a system explanatory view showing an example of the configuration of a conventional high-pressure water supply system.
１ １段目ポンプ ２ ２段目ポンプ ３ 自動遮断弁 ４ 減圧オリフィス ５ａ ２段目ポンプ吸込側エアー抜き管 ５ｂ 吸込側エアー抜き用自動弁 ６ａ ２段目ポンプ吐出側エアー抜き管 ６ｂ 吐出側エアー抜き用自動弁 ７ 圧力スイッチ ８ａ、８ｂ、８ｃ、８ｄ 空気逆流防止用逆Ｕ字型管路 ９ ポンプ間主管路 １０ バイパス管路 １１ 高圧水供給管路 １２ 低圧水供給管路 1 1st stage pump 2 2nd stage pump 3 Automatic shutoff valve 4 Pressure reducing orifice 5a 2nd stage pump Suction side air vent pipe 5b Suction side air vent automatic valve 6a 2nd stage pump Discharge side air vent pipe 6b Discharge side air vent Automatic valve 7 Pressure switch 8a, 8b, 8c, 8d Reverse U-shaped pipe line for air backflow prevention 9 Main line between pumps 10 Bypass line 11 High pressure water supply line 12 Low pressure water supply line
Claims (1)
アー抜き弁を備えた２段ブースタ式高圧水供給システム
のポンプ起動時の自動エアー抜き方法において、１段目
ポンプの吐出側に該ポンプの吐出圧を検出する検出手段
を設け、また、該検出手段の後流の１段目・２段目ポン
プ間の主管路に該主管路の自動遮断弁及び該自動遮断弁
をバイパスするように１段目ポンプの吐出圧の減圧手段
をそれぞれ設けると共に２段目ポンプの吐出側逆Ｕ字型
管路にエアー抜き弁を設けておき、２段目ポンプの吸込
側・吐出側逆Ｕ字型管路の両エアー抜き弁を開とすると
共に該自動遮断弁を閉として該主管路に該減圧手段を介
在させた後、１段目ポンプを起動させて該減圧手段を介
した低圧水により該主管路及び該各管路内のエアー抜き
を行い、該検出手段で１段目ポンプの吐出圧が設定値と
なっていることを確認して所定の時間径過後該両エアー
抜き弁を閉とすると共に該自動遮断弁を開とすることを
特徴とする２段ブースタ式高圧水供給システムのポンプ
起動時の自動エアー抜き方法。1. An automatic air bleeding method at the time of pump startup of a two-stage booster type high-pressure water supply system equipped with an air bleeding valve in the reverse U-shaped pipe line on the suction side of the second stage pump. A detection means for detecting the discharge pressure of the pump is provided on the side, and an automatic shutoff valve for the main pipeline and an automatic shutoff valve are provided in the main pipeline between the first and second stage pumps downstream of the detection means. A pressure reducing means for the discharge pressure of the first stage pump is provided so as to bypass, and an air vent valve is provided in the reverse U-shaped conduit of the discharge stage of the second stage pump, and the suction side and the discharge side of the second stage pump are provided. After opening both air vent valves of the inverted U-shaped conduit and closing the automatic shutoff valve to interpose the pressure reducing means in the main conduit, the first stage pump was activated to operate the pressure reducing means. Air is removed from the main pipeline and each pipeline by low-pressure water, and the detection means After confirming that the discharge pressure of the first-stage pump has reached the set value, both of the air vent valves are closed and the automatic shutoff valve is opened after a predetermined time period has elapsed. Automatic air bleeding method when the pump of the booster type high pressure water supply system is started.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33312792A JPH06179015A (en) | 1992-12-14 | 1992-12-14 | Automatic air bleeding method in starting time of two stage booster type high pressure water supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33312792A JPH06179015A (en) | 1992-12-14 | 1992-12-14 | Automatic air bleeding method in starting time of two stage booster type high pressure water supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06179015A true JPH06179015A (en) | 1994-06-28 |
Family
ID=18262599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33312792A Withdrawn JPH06179015A (en) | 1992-12-14 | 1992-12-14 | Automatic air bleeding method in starting time of two stage booster type high pressure water supply system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06179015A (en) |
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|---|---|---|---|---|
| CN104896650A (en) * | 2014-03-05 | 2015-09-09 | 珠海格力电器股份有限公司 | Air conditioning water system exhaust control method and device and air conditioning system |
| KR20160142737A (en) * | 2015-06-03 | 2016-12-13 | 경성대학교 산학협력단 | Pump system for high pressure loading device |
| WO2017187644A1 (en) * | 2016-04-28 | 2017-11-02 | 株式会社ＥｘａＳｃａｌｅｒ | Refrigeration system |
| CN109404727A (en) * | 2018-10-31 | 2019-03-01 | 沪东中华造船(集团)有限公司 | A kind of shipbuilding compressed air pipe system |
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-
1992
- 1992-12-14 JP JP33312792A patent/JPH06179015A/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896650A (en) * | 2014-03-05 | 2015-09-09 | 珠海格力电器股份有限公司 | Air conditioning water system exhaust control method and device and air conditioning system |
| CN104896650B (en) * | 2014-03-05 | 2017-08-29 | 珠海格力电器股份有限公司 | Air conditioning water system exhaust control method and device and air conditioning system |
| KR20160142737A (en) * | 2015-06-03 | 2016-12-13 | 경성대학교 산학협력단 | Pump system for high pressure loading device |
| WO2017187644A1 (en) * | 2016-04-28 | 2017-11-02 | 株式会社ＥｘａＳｃａｌｅｒ | Refrigeration system |
| JP6244066B1 (en) * | 2016-04-28 | 2017-12-06 | 株式会社ＥｘａＳｃａｌｅｒ | Cooling system |
| US11023021B2 (en) | 2016-04-28 | 2021-06-01 | Exascaler Inc. | Cooling system to minimize generation of bubbles inside flow passage by utilizing an auxiliary pump |
| CN109404727A (en) * | 2018-10-31 | 2019-03-01 | 沪东中华造船(集团)有限公司 | A kind of shipbuilding compressed air pipe system |
| CN110280602A (en) * | 2019-07-19 | 2019-09-27 | 北京宇轩智能科技有限公司 | Intelligent steel rolling rolling assessment system and processing method extremely |
| CN110280602B (en) * | 2019-07-19 | 2021-01-05 | 北京宇轩智能科技有限公司 | Intelligent steel rolling abnormal rolling evaluation system and processing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000307 |