JPH0125894B2 - - Google Patents

Info

Publication number
JPH0125894B2
JPH0125894B2 JP55110247A JP11024780A JPH0125894B2 JP H0125894 B2 JPH0125894 B2 JP H0125894B2 JP 55110247 A JP55110247 A JP 55110247A JP 11024780 A JP11024780 A JP 11024780A JP H0125894 B2 JPH0125894 B2 JP H0125894B2
Authority
JP
Japan
Prior art keywords
opening
cooling water
closing
sand
circuit
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
Application number
JP55110247A
Other languages
Japanese (ja)
Other versions
JPS5735164A (en
Inventor
Asami Sato
Nobusuke Takagi
Hiroshi Okumura
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11024780A priority Critical patent/JPS5735164A/en
Publication of JPS5735164A publication Critical patent/JPS5735164A/en
Publication of JPH0125894B2 publication Critical patent/JPH0125894B2/ja
Granted legal-status Critical Current

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/20Hydro energy

Landscapes

  • Hydraulic Turbines (AREA)

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、水車、ポンプ水車、ポンプ等の水力
機械の冷却水系統における排砂弁制御回路に関す
る。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sand discharge valve control circuit in a cooling water system of a hydraulic machine such as a water turbine, a pump water turbine, or a pump.

〔従来の技術〕[Conventional technology]

従来の冷却水系統を第1図により説明する。 A conventional cooling water system will be explained with reference to FIG.

第1図において、主軸1と同期回転するように
ランナ2が配設されている。このランナ2の回転
を制御するガイドベーン3がケーシング4の近傍
に配設されている。ランナ2からの流水は吸出し
管5に導かれる。吸出し管5の中間位置底部に
は、異物除去用のスクリーン6を介して冷却給水
管7が開口している。
In FIG. 1, a runner 2 is arranged to rotate synchronously with the main shaft 1. A guide vane 3 for controlling the rotation of the runner 2 is arranged near the casing 4. Flowing water from the runner 2 is guided to a suction pipe 5. A cooling water supply pipe 7 is opened at the bottom of the suction pipe 5 at an intermediate position through a screen 6 for removing foreign matter.

冷却給水管7にはポンプ8および冷却水中の砂
や異物を集積するストレーナ9が介装されてお
り、ポンプ8により高圧にされ、かつストレーナ
9により微細な異物を除去された冷却水をランナ
シール部13,主軸封水装置16、水車軸受1
7、ストラスト軸受18、主要変圧器19、空気
冷却器20、発電機軸受21、液体抵抗器22等
の冷却水を必要とする各機器に圧送するようにな
つている。そして、各機器を冷却した冷却水は、
昇温され、図中破線で示す排水管23を介して再
び吸出し管5に排出される。また、何らかの原因
で冷却水量が低下した場合、それに起因する事故
を未然に防止する目的で、流量継電器24,2
5,26が例えばランナシール部冷却水管、主軸
封水装置冷却水管、冷却水排水管23にそれぞれ
に配設され、所定の冷却水量以下まで低下した場
合、主機を停止させるように構成されている。
The cooling water supply pipe 7 is equipped with a pump 8 and a strainer 9 that collects sand and foreign matter in the cooling water. Part 13, main shaft water sealing device 16, water turbine bearing 1
7. Cooling water is pumped to each device that requires cooling water, such as the thrust bearing 18, the main transformer 19, the air cooler 20, the generator bearing 21, and the liquid resistor 22. The cooling water used to cool each device is
The temperature is raised and the water is discharged to the suction pipe 5 again via the drain pipe 23 shown by the broken line in the figure. In addition, if the amount of cooling water decreases for some reason, flow relays 24 and 2 are installed to prevent accidents caused by this.
5 and 26 are installed, for example, in the runner seal cooling water pipe, the main shaft water sealing device cooling water pipe, and the cooling water drain pipe 23, respectively, and are configured to stop the main engine when the amount of cooling water drops below a predetermined level. .

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

しかしながら、以上の構成には次のような欠点
があつた。
However, the above configuration has the following drawbacks.

即ち、排砂弁10は、主機のいかなる運転状態
にもかかわらず、例えば限時継電器により一定時
間経過時、又は一定累積運転時間経過後に自動的
に開放され、ストレーナ9の排砂、洗浄が行なわ
れる。この排砂弁口径は、一例によれば350mmの
冷却水給水管7に対し200mmという大口径が必要
であるため、1旦排砂弁10を開放すると、相当
量の冷却水がこの排砂管の方へ流入してしまうた
めに、各冷却器への冷却水量が低下し、従つて流
量継電器24,25,26が作動し、主機を停止
させるので、主機からの電力供給が不安定にな
る。
That is, regardless of the operating state of the main engine, the sand discharge valve 10 is automatically opened, for example, by a time-limited relay, after a certain period of time has elapsed, or after a certain cumulative operating time has elapsed, and the strainer 9 is drained and cleaned. . For example, the diameter of this sand discharge valve needs to be as large as 200 mm compared to the 350 mm cooling water supply pipe 7. Therefore, once the sand discharge valve 10 is opened, a considerable amount of cooling water flows into the sand discharge pipe. As a result, the amount of cooling water flowing into each cooler decreases, and the flow rate relays 24, 25, and 26 are activated, stopping the main engine, making the power supply from the main engine unstable. .

本発明の目的は、運転中の水力機械が冷却水の
不足により停止するのを防止して、電力供給を安
定させ、しかも諸機器の冷却を良好になし得るよ
うにした水力機械の冷却水系統の排砂弁制御回路
を提供することにある。
An object of the present invention is to provide a cooling water system for hydraulic machinery that prevents hydraulic machinery in operation from stopping due to lack of cooling water, stabilizes the power supply, and allows for good cooling of various equipment. The purpose of the present invention is to provide a sand discharge valve control circuit.

〔課題を解決するための手段〕[Means to solve the problem]

本発明の排砂弁制御回路は、開放用励磁コイル
88SRが励磁されて、開放用開閉器88SR′を
閉じて排砂弁を開放する開放用回路50と、 開放用励磁コイルを励磁すると開放される開放
用補助B接点88SRBと、開放用補助B接点を
閉じると閉鎖用励磁コイル88SLを励磁して、
閉鎖用開閉器88SL′を閉じて排砂弁を閉鎖する
閉鎖用回路51と、 上記開放用回路に接続した水力機械と電気系統
とを解列した時のみ閉じる継電機5Xと、 を備えたことにある。
The sand removal valve control circuit of the present invention includes an opening circuit 50 that opens the sand removal valve by closing the opening switch 88SR' when the opening excitation coil 88SR is excited, and an opening circuit 50 that opens the sand removal valve by energizing the opening excitation coil 88SR'. When the opening auxiliary B contact 88SRB and the opening auxiliary B contact are closed, the closing excitation coil 88SL is energized,
A closing circuit 51 that closes the closing switch 88SL' to close the sand discharge valve; and a relay 5X that closes only when the hydraulic machine and electrical system connected to the opening circuit are disconnected. It is in.

〔作用〕[Effect]

この結果、継電機5Xは主機が停止している時
にしか動作せず、運転中に排砂を行うことがない
から、排砂作業で主機を停止させることなく、主
機から常に電力を安定して供給することができる
ので、電力供給を安定して行うことができる。
As a result, the relay 5X only operates when the main engine is stopped, and does not remove sand during operation, so it does not have to stop the main engine for sand removal work and can always provide stable power from the main engine. Therefore, the power can be stably supplied.

〔実施例〕〔Example〕

以下、本発明の実施例を第2図に示す制御回路
により説明する。第2図は可動接触子43Sを自
動操作回路側に切換えた場合を説明する。
Hereinafter, an embodiment of the present invention will be explained using a control circuit shown in FIG. FIG. 2 explains the case where the movable contactor 43S is switched to the automatic operation circuit side.

電動機用電源49Aと電動機11との間に断路
器49Bおよびサーマルリレー49Cと開放用お
よび閉鎖用開閉器88SR′,88SL′とを接続し
ている。開放用開閉器88SR′および閉鎖用開閉
器88SL′と断路器49Bとの間には制御回路1
00を接続している。制御回路100は主として
開放用回路50および閉鎖用回路51とより成
り、次の動作をする。尚、本発明の発明個所は図
中に鎖線で包囲して示してある。
A disconnector 49B, a thermal relay 49C, and opening and closing switches 88SR' and 88SL' are connected between the electric motor power supply 49A and the electric motor 11. A control circuit 1 is provided between the opening switch 88SR' and the closing switch 88SL' and the disconnecting switch 49B.
00 is connected. The control circuit 100 mainly consists of an opening circuit 50 and a closing circuit 51, and operates as follows. Incidentally, the invention portions of the present invention are shown surrounded by chain lines in the drawings.

(1) 主機たとえば発電機・水車が運転中には、継
電機5Xおよび排砂弁10を開放すると、開放
用回路50に設けられた開放用励磁コイル88
SR(主機の解列から次の起動操作するまで励磁
される継電器)のa接点が開放されているが、
他の排砂弁保護リレー86S、キープ用補助接
点88SX、位置開閉器33Shbは閉じている。
したがつて、排砂弁10は閉じられているの
で、冷却水は主機の冷却水系統に供給されてい
る。
(1) When the main engine, such as a generator or a water turbine, is in operation, when the relay 5X and the sand removal valve 10 are opened, the opening excitation coil 88 provided in the opening circuit 50
The a contact of the SR (relay that is energized from the time the main engine is disconnected until the next startup operation) is open, but
The other sand discharge valve protection relay 86S, keep auxiliary contact 88SX, and position switch 33Shb are closed.
Therefore, since the sand discharge valve 10 is closed, cooling water is being supplied to the cooling water system of the main engine.

(2) この状態で、主機の停止操作によつて、発電
機が電力系統から解列されると、継電器5Xが
閉じて、開放用励磁コイル88SRに電流が流
れ、開放用励磁コイル88SRが励磁され、開
放用開閉器88SR′が閉じる。そうすると電動
機11がたとえば時計方向に回転すると共に、
開放用補助A接点88SRAを閉じて、開放用
補助B接点88SRBを開放する。この結果、
電動機11の回転に応じて、排砂弁10は開放
動作を開始して、全開放位置に達すると、開放
用位置開閉器33Shbを開放するため、開放用
励磁コイル88SRが消磁され、排砂弁10は
全開放位置で静止している。電動機11は開放
用開閉器88SR′の励磁および消磁により回転
および停止をする。また、開放用励磁コイル8
8SRが消磁されると、開放用補助B接点88
SRBは開放状態から閉じ状態になる。
(2) In this state, when the generator is disconnected from the power system by stopping the main engine, the relay 5X closes, current flows through the opening excitation coil 88SR, and the opening excitation coil 88SR is excited. The opening switch 88SR' is closed. Then, the electric motor 11 rotates, for example, clockwise, and
Close the opening auxiliary A contact 88SRA and open the opening auxiliary B contact 88SRB. As a result,
In response to the rotation of the electric motor 11, the sand removal valve 10 starts an opening operation, and when it reaches the fully open position, the opening excitation coil 88SR is demagnetized to open the opening position switch 33Shb, and the sand removal valve 10 opens. 10 is at rest in the fully open position. The electric motor 11 rotates and stops by energizing and demagnetizing the opening switch 88SR'. In addition, the excitation coil 8 for opening
When 8SR is demagnetized, the opening auxiliary B contact 88
SRB changes from open state to closed state.

一方、開放用補助A接点88SRAが閉じる
と、タイマ88STは設定された時間排砂弁1
0の開放状態を保持する(この時、開放用補助
A接点88SRAが開いて、自己保持接点88
ST′が閉じて、自己保持回路を形成してい
る。)。この間に冷却水がストレーナ9より鎖線
で示す方向に排水されるので、ストレーナ内の
異物たとえば砂を除去して、洗浄する。
On the other hand, when the opening auxiliary A contact 88SRA closes, the timer 88ST starts the sand discharge valve 1 for the set time.
0 open state (at this time, the opening auxiliary A contact 88SRA opens and the self-holding contact 88
ST′ is closed and forms a self-holding circuit. ). During this time, the cooling water is drained from the strainer 9 in the direction shown by the chain line, so that foreign matter such as sand in the strainer is removed and cleaned.

(3) タイマ88STが設定時間を経過すると、タ
イマ88STのタイマ補助接点88STAが閉じ
て、閉鎖用回路51に設けた閉鎖用励磁コイル
88SLが励磁されると、閉鎖用開閉器88
SL′が閉じる。そうすると、電動機11がたと
えば反時計方向に回転すると共に、閉鎖用補助
A接点88SLAが閉じる。この結果、電動機
11の回転に応じて、排砂弁10は閉動作を開
始し、全閉鎖位置に達すると、閉鎖用位置開閉
器33SlAが開放されるため、閉鎖用励磁コイ
ル88SLが消磁され、排砂弁10は全閉鎖位
置で静止している。電動機11は上記閉鎖用励
磁コイル88SLの消磁により電源が切れる。
(3) When the timer 88ST has elapsed the set time, the timer auxiliary contact 88STA of the timer 88ST closes and the closing excitation coil 88SL provided in the closing circuit 51 is excited, and the closing switch 88
SL′ closes. Then, the electric motor 11 rotates counterclockwise, for example, and the closing auxiliary A contact 88SLA closes. As a result, the sand discharge valve 10 starts to close in accordance with the rotation of the electric motor 11, and when it reaches the fully closed position, the closing position switch 33SlA is opened, so that the closing excitation coil 88SL is demagnetized. The sand discharge valve 10 is stationary in the fully closed position. The electric motor 11 is powered off by demagnetizing the closing excitation coil 88SL.

一方、閉鎖用補助A接点88SLAが閉じ、
キープ用閉鎖接点88SXOを励磁すると、キ
ープ用補助接点88SXを開放する。したがつ
て、第2回目の排砂弁10の開動作を行うのを
阻止することができる。
On the other hand, the closing auxiliary A contact 88SLA closes,
When the keep close contact 88SXO is energized, the keep auxiliary contact 88SX is opened. Therefore, it is possible to prevent the second opening operation of the sand discharge valve 10 from being performed.

(4) 次に主機を再度運転する場合には、起動接点
5X′を閉じて、起動用開閉器88SXRを励磁
すると、キープ用補助接点88SXが閉じて、
上記の状態にもどり、同様の動作を行う。
(4) Next, when operating the main engine again, close the starting contact 5X' and energize the starting switch 88SXR, and the auxiliary keep contact 88SX will close.
Return to the above state and perform the same operation.

このように、本発明の継電機5Xは、主機の停
止に応じて、閉動作をするようにした。この結
果、主機が停止時に冷却水をストレーナ9を通し
て排水し、主機が運転中に従来技術のように停止
することなく、冷却水を各諸機器に供給できるか
ら安全であると共に、電力供給を安定して行うこ
とができる。更に制御回路に継電機5Xを設ける
だけでよいから、構造が簡単で既存の制御回路を
容易に改良できる。
In this way, the relay 5X of the present invention is configured to perform a closing operation in response to the stoppage of the main engine. As a result, when the main engine is stopped, the cooling water is drained through the strainer 9, and while the main engine is in operation, cooling water can be supplied to various devices without stopping unlike conventional technology, making it safe and stabilizing the power supply. You can do it by doing this. Furthermore, since it is only necessary to provide the relay 5X in the control circuit, the structure is simple and the existing control circuit can be easily improved.

また、制御回路にキープ用閉鎖接点88SXO
およびその補助接点88SXを設けているので、
第1回目の排砂弁の開動作を行なつた後、第2回
目の排砂弁の開動作を防止しているので、排砂弁
を何回も動作させる無駄を除去することができ
る。
In addition, the control circuit has a closing contact 88SXO for keeping.
And its auxiliary contact 88SX is provided, so
Since the second opening operation of the sand removal valve is prevented after the first opening operation of the sand removal valve is performed, it is possible to eliminate the waste of operating the sand removal valve many times.

〔発明の効果〕〔Effect of the invention〕

以上のように、本発明の制御回路は継電機を設
ける簡単な構造で、運転中以外に排砂をするよう
にしたので、主機の運転中に冷却水の不足を生じ
ることなく、安全であると共に、電力を安定して
供給するとができる。
As described above, the control circuit of the present invention has a simple structure in which a relay is provided, and sand is removed at times other than during operation, so there is no shortage of cooling water while the main engine is operating, and it is safe. At the same time, power can be stably supplied.

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

第1図は従来の水車の冷却水給排水系統を示す
説明図、第2図は本発明の一実施例を示す排砂弁
の制御回路図である。 10…排砂弁、11…電動機、5X…継電機、
33Shbおよび33Sla…開放および閉鎖用位置
開閉器、88SRおよび88SL…開放および閉鎖
用励磁コイル、50および51…開放および閉鎖
用回路。
FIG. 1 is an explanatory diagram showing a conventional water turbine cooling water supply and drainage system, and FIG. 2 is a control circuit diagram of a sand discharge valve showing an embodiment of the present invention. 10... Sand discharge valve, 11... Electric motor, 5X... Relay,
33Shb and 33Sla...position switches for opening and closing, 88SR and 88SL...excitation coils for opening and closing, 50 and 51...circuits for opening and closing.

Claims (1)

【特許請求の範囲】 1 吸出管5の冷却水ポンプ8で汲み上げて、冷
却水を水力機械の冷却水系統に供給し冷却部を冷
却し、冷却水系統に異物を除去する排砂弁付きス
トレーナ9を設置し、排砂弁10に電動機11を
連結し、電動機の回転に応じて排砂弁の開閉を制
御する制御回路を電源49Aと電動機11との間
に設けたものにおいて、 上記制御回路は、開放用励磁コイル88SRを
励磁し、開放用開閉器88SR′を閉じて排砂弁を
開放する開放用回路50と、 開放用励磁コイルを励磁すると開放される開放
用補助B接点88SRBと、開放用補助B接点を
閉じると閉鎖用励磁コイル88SLを励磁して、
閉鎖用開閉器88SL′を閉じて排砂弁を閉鎖する
閉鎖用回路51と、 上記開放用回路に接続した水力機械と電気系統
とを解列した時のみ閉じる継電器5Xと、を備え
たことを特徴とする水力機械の排砂弁制御回路。
[Claims] 1. A strainer with a sand discharge valve that pumps up the cooling water with the cooling water pump 8 of the suction pipe 5, supplies the cooling water to the cooling water system of the hydraulic machine, cools the cooling part, and removes foreign matter from the cooling water system. 9 is installed, an electric motor 11 is connected to the sand removal valve 10, and a control circuit is provided between the power source 49A and the electric motor 11 for controlling the opening and closing of the sand removal valve according to the rotation of the motor. The opening circuit 50 excites the opening excitation coil 88SR, closes the opening switch 88SR' and opens the sand removal valve, and the opening auxiliary B contact 88SRB opens when the opening excitation coil is excited. When the opening auxiliary B contact is closed, the closing excitation coil 88SL is energized,
It is equipped with a closing circuit 51 that closes the closing switch 88SL' to close the sand discharge valve, and a relay 5X that closes only when the hydraulic machine and electrical system connected to the opening circuit are disconnected. Features a sand discharge valve control circuit for hydraulic machinery.
JP11024780A 1980-08-13 1980-08-13 Sand discharge method from cooling water line for hydraulic machinery Granted JPS5735164A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11024780A JPS5735164A (en) 1980-08-13 1980-08-13 Sand discharge method from cooling water line for hydraulic machinery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11024780A JPS5735164A (en) 1980-08-13 1980-08-13 Sand discharge method from cooling water line for hydraulic machinery

Publications (2)

Publication Number Publication Date
JPS5735164A JPS5735164A (en) 1982-02-25
JPH0125894B2 true JPH0125894B2 (en) 1989-05-19

Family

ID=14530834

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11024780A Granted JPS5735164A (en) 1980-08-13 1980-08-13 Sand discharge method from cooling water line for hydraulic machinery

Country Status (1)

Country Link
JP (1) JPS5735164A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5722299A (en) * 1994-06-30 1998-03-03 Fuji Kiko Co., Ltd. Adjustable steering column assembly for a vehicle

Also Published As

Publication number Publication date
JPS5735164A (en) 1982-02-25

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