JPS6112155B2 - - Google Patents
Info
- Publication number
- JPS6112155B2 JPS6112155B2 JP52111652A JP11165277A JPS6112155B2 JP S6112155 B2 JPS6112155 B2 JP S6112155B2 JP 52111652 A JP52111652 A JP 52111652A JP 11165277 A JP11165277 A JP 11165277A JP S6112155 B2 JPS6112155 B2 JP S6112155B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- switching
- switching valve
- fully closed
- rotary
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 2
- 238000001514 detection method Methods 0.000 description 22
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Fluid-Driven Valves (AREA)
- Control Of Water Turbines (AREA)
- Fluid-Pressure Circuits (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、水力発電所における入口弁の制御方
法に係り、特に入口弁として可動シートにより流
水を遮断する球形弁（回転弁）を用いた場合の制
御方法に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a method for controlling an inlet valve in a hydroelectric power plant, and particularly when a spherical valve (rotary valve) that shuts off flowing water with a movable seat is used as the inlet valve. Concerning a control method.
近年、水力発電所は夜間の余剰電力を利用する
ポンプ水車の発達が著しい。これに伴い水車の単
機出力は、余剰電力により定められるためいきお
い大容量化となる。従つて、入口弁も大口径高水
圧弁が必要となる。
In recent years, there has been a remarkable development of pump turbines that utilize surplus electricity at night at hydroelectric power plants. As a result, the output of a single water turbine is determined by the surplus electricity, resulting in a much larger capacity. Therefore, the inlet valve also requires a large diameter, high water pressure valve.
こうした状況から、水車用入口弁としては、大
口径、高水圧に耐え、かつ漏水の少ない回転弁が
採用されている。 Under these circumstances, rotary valves that have a large diameter, can withstand high water pressure, and have little water leakage have been adopted as inlet valves for water turbines.
以下、従来の入口弁制御方法を第１図によつて
説明する。図において、入口弁は、弁箱１３内に
組込まれた回転弁弁体１２と、弁箱１３の下流側
にあつて回転弁弁体１２と弁箱１３との隙間を軸
方向に摺動可能なシール用可動シート７とより構
成されており、可動シート７を回転弁弁体１２に
圧着させることにより密閉できる。 Hereinafter, a conventional inlet valve control method will be explained with reference to FIG. In the figure, the inlet valve is located on the downstream side of the rotary valve body 12 and the rotary valve body 12 incorporated in the valve body 13 and is slidable in the axial direction through the gap between the rotary valve body 12 and the valve body 13. The movable sealing seat 7 can be sealed by pressing the movable seat 7 onto the rotary valve body 12.
主機起動に先立ち、まず入口弁開操作指令が来
ると、入口弁開閉用電磁弁１の開用電磁コイル２
１Ｓが付勢され、Ｐ圧油は管路Ａを経て側弁開閉
用切換弁２に作用し、側弁開閉用切換弁２を切換
える。このため側弁開閉用切換弁２のP′圧油ポー
トはＢポートに通じ、圧油は側弁用シリンダー３
の開側となる下側に通じ、側弁１６を全開とす
る。側弁１６が全開となると、油切換弁４が切換
えられ、P″圧油ポートはＣポートを経て水圧作
用弁５に通じる。前記側弁１６の全開により、上
流側流水管１４の圧力水はバイパス配管を経て、
下流側流水管１５に流れ、下流側鉄管に水圧が確
立する。水圧がある値以上になると、水圧作用弁
５はばねに抗して切換えられ、圧油はシート切換
弁６に通じ、シート切換弁６を切換える（即ち、
管路G′を経てシート切換弁６に作用している操
作力より大きな力となるため、Ｃポートからの圧
油により優先的にシート切換弁６は切換えられ
る）。 Prior to starting the main engine, when an inlet valve opening operation command is received, the opening electromagnetic coil 2 of the inlet valve opening/closing electromagnetic valve 1
1S is energized, the P pressure oil acts on the side valve opening/closing switching valve 2 through the pipe A, and switching the side valve opening/closing switching valve 2. Therefore, the P' pressure oil port of the side valve opening/closing switching valve 2 communicates with the B port, and the pressure oil is supplied to the side valve cylinder 3.
The side valve 16 is fully opened. When the side valve 16 is fully opened, the oil switching valve 4 is switched, and the P″ pressure oil port communicates with the water pressure operation valve 5 via the C port. By fully opening the side valve 16, the pressure water in the upstream water pipe 14 is After bypass piping,
The water flows into the downstream water pipe 15, and water pressure is established in the downstream iron pipe. When the water pressure exceeds a certain value, the hydraulic valve 5 is switched against the spring, and the pressure oil passes through the seat switching valve 6 and switches the seat switching valve 6 (i.e.
Since the force is greater than the operating force acting on the seat switching valve 6 via the pipe G', the seat switching valve 6 is preferentially switched by the pressure oil from the C port).
従つて、Ｐ圧油は、Ｄポートに通じ、可動シ
ート７を回転弁弁体１２より離す。可動シート７
が完全に開動作すると、可動シート７の操作桿７
Ａによつて油切換弁８が切換り、入口弁開閉電磁
弁１の管路Ａの圧油は、油切換弁８のＥポートを
介して回転弁切換弁９に通じ、回転弁切換弁９を
切替える。このためP0圧油はＦポートを経て、回
転弁サーボシリンダー１０の開側となる下側に作
用し、回転弁弁体１２を全開する。 Therefore, the P pressure oil communicates with the D port and separates the movable seat 7 from the rotary valve body 12. Movable seat 7
When the operation lever 7 of the movable seat 7 is fully opened,
The oil switching valve 8 is switched by A, and the pressure oil in the pipe A of the inlet valve opening/closing solenoid valve 1 is communicated with the rotary valve switching valve 9 via the E port of the oil switching valve 8. Switch. Therefore, the P 0 pressure oil passes through the F port and acts on the lower side, which is the open side, of the rotary valve servo cylinder 10, and fully opens the rotary valve body 12.
回転弁弁体１２が全開になると、回転弁全閉検
出用切換弁１１は圧油により切換り、管路G′を
経てシート切換弁６に作用していた圧油を排油せ
しめると同時に、Ｐ圧油は管路Ｇを経て側弁開
閉切換弁２に作用し、側弁開閉用切換弁２を全開
位置に保持する。この回転弁弁体１２が全開の状
態において、主機停止により入口弁の閉操作指令
が来ると、入口弁開閉用電磁弁１の開用電磁コイ
ル２１Ｔが付勢されるため、管路Ａの圧油がＴポ
ートより排油される。このため、油切換弁８を経
て、回転弁切換弁９に作用していた圧油も排油と
なるので、回転弁切換弁９はばね力により切換え
られ、P0圧油がF′ポートを経て回転弁サーボシ
リンダー１０の閉側となる上側に通じ、一方Ｆポ
ートの圧油が排油されるので、回転弁弁体１２が
全閉となる。 When the rotary valve body 12 is fully opened, the rotary valve fully closed detection switching valve 11 is switched by pressure oil, and at the same time, the pressure oil acting on the seat switching valve 6 is drained through the pipe G'. The P pressure oil acts on the side valve switching valve 2 through the pipe G, and holds the side valve switching valve 2 in the fully open position. When the rotary valve body 12 is fully open and a command to close the inlet valve is received due to a main engine stop, the opening electromagnetic coil 21T of the inlet valve opening/closing electromagnetic valve 1 is energized, so that the pressure in the pipe A is Oil is drained from the T port. Therefore, the pressure oil that was acting on the rotary valve switching valve 9 passes through the oil switching valve 8 and is also drained, so the rotary valve switching valve 9 is switched by the spring force, and the P 0 pressure oil flows through the F' port. It then communicates with the upper side, which is the closed side, of the rotary valve servo cylinder 10, and on the other hand, the pressure oil in the F port is drained, so the rotary valve body 12 becomes fully closed.
この間、管路Ａの圧油が排油されても、側弁開
閉用切換弁２は回転弁全閉検出用切換弁１１の管
路Ｇからの圧油により、側弁６は回転弁弁体１２
の全閉まで開状態を保持する。 During this period, even if the pressure oil in the pipe A is drained, the side valve opening/closing switching valve 2 is operated by the pressure oil from the pipe G of the rotary valve fully closed detection switching valve 11, and the side valve 6 is turned off by the rotary valve body. 12
It remains open when fully closed.
回転弁弁体１２が全閉すると、回転弁全閉検出
用切換弁１１がレバー２１により機械的に切換え
られ、管路Ｇの圧油が排油となり、側弁開閉用切
換弁２がばね力により切換えられ、初めてＢポー
ト圧油が排油される。このためP′圧油がB′ポート
を経て側弁用シリンダー３の閉側となる上側に通
じ側弁１６を全閉する。側弁１６の全閉により、
油切換弁４がばね力により切換えられ、水圧作用
弁５を経てシート切換弁６へ通じていた圧油が排
油となる。従つて、シート切換弁６は、回転弁弁
体１２の全閉により回転弁全閉検出切換弁１１が
切換つており、P′0圧油が管路G′に通油されてい
た圧油により切換えられ、Ｐ圧油がD′ポート
に通じ可動シート７を回転弁弁体１２に圧着させ
る。このため、流水は完全に遮断され入口弁を全
閉する。 When the rotary valve body 12 is fully closed, the rotary valve fully closed detection switching valve 11 is mechanically switched by the lever 21, the pressure oil in the pipe G becomes waste oil, and the side valve opening/closing switching valve 2 is activated by spring force. The B port pressure oil is drained for the first time. Therefore, the P' pressure oil passes through the B' port to the upper side, which is the closed side, of the side valve cylinder 3, completely closing the side valve 16. By fully closing the side valve 16,
The oil switching valve 4 is switched by a spring force, and the pressure oil that has been communicating with the seat switching valve 6 via the hydraulic valve 5 becomes waste oil. Therefore, in the seat switching valve 6, the rotary valve fully closed detection switching valve 11 is switched by the fully closing of the rotary valve valve body 12, and the P'0 pressure oil is caused by the pressure oil flowing through the pipe G'. The P pressure oil passes through the D' port and presses the movable seat 7 against the rotary valve body 12. Therefore, the flowing water is completely cut off and the inlet valve is fully closed.
このように、回転弁全閉検出用切換弁１１の動
作は、回転弁弁体１２の正常な操作に極めて重要
であり、
(1) 回転弁弁体１２が完全に全閉位置となるまで
側弁１６を開状態に保持している。 As described above, the operation of the rotary valve fully closed detection switching valve 11 is extremely important for the normal operation of the rotary valve body 12. Valve 16 is held open.
(2) 回転弁弁体１２及び側弁１６が全閉し後で可
動シート７を動作させ、回転弁弁体１２に圧着
させて流水を遮断する。(2) After the rotary valve body 12 and the side valve 16 are fully closed, the movable seat 7 is operated and press-fitted to the rotary valve body 12 to cut off the water flow.
と云う二点の重要な役割を持つている。It has two important roles.
しかし、この従来技術において回転弁全閉検出
用切換弁１１の誤動作は、入口弁の安全な操作の
ためには絶対に許されない。もし、この回転弁全
閉検出用切換弁１１が何らかの理由で動作不能と
なると（回転弁全閉時に全閉状態のままでいる）
入口弁開閉用電磁弁１の閉用電磁コイル２１Ｔの
付勢により、管路Ａの圧油が排油された際、回転
弁切換弁９の動作と同時に回転弁全閉検出用切換
弁１１の管路Ｇに圧油が通じていないため、側弁
開閉切換弁２もばね力により同時に切換り、回転
弁弁体１２と側弁１６は同時に閉動作を開始す
る。一般に回転弁弁体１２の閉動作時間が側弁１
６より長いため、回転弁弁体１２が閉動作中に油
切換弁４もばね力で切換りシート切換弁６へのＣ
ポート圧油が排油となり、G′圧油によりシール
切換弁６が切換り、可動シート７が閉操作され
る。このため、回転弁弁体１２は可動シート７に
圧着されながら閉動作することになり、摺動面に
異物噛み込み等による損傷を誘発することにな
る。万一、入口弁シート面が損傷事故を引き起す
と発電所の正常運転は不能となり発電所の機能を
全く失うことになる。復旧に際しては多額の費用
と多くの日時を要してしまう。 However, in this prior art, malfunction of the rotary valve fully closed detection switching valve 11 is absolutely unacceptable for safe operation of the inlet valve. If this rotary valve fully closed detection switching valve 11 becomes inoperable for some reason (it remains in the fully closed state when the rotary valve is fully closed)
When the pressure oil in the pipe A is drained by the energization of the closing electromagnetic coil 21T of the inlet valve opening/closing solenoid valve 1, the rotary valve switching valve 9 operates and the rotary valve fully closed detection switching valve 11 is activated. Since pressure oil does not flow through the pipe G, the side valve switching valve 2 is also switched at the same time by the spring force, and the rotary valve body 12 and the side valve 16 start closing operations at the same time. Generally, the closing operation time of the rotary valve body 12 is
6, the oil switching valve 4 is also switched by the spring force while the rotary valve body 12 is in the closing operation, and the C to the seat switching valve 6 is
The port pressure oil becomes drain oil, and the seal switching valve 6 is switched by the G' pressure oil, and the movable seat 7 is operated to close. For this reason, the rotary valve body 12 closes while being pressed against the movable seat 7, which may cause damage to the sliding surface due to foreign matter getting caught. In the unlikely event that the inlet valve seat surface is damaged and an accident occurs, normal operation of the power plant will become impossible and the power plant will lose all functions. Restoration requires a large amount of money and time.
本発明は、上記に鑑みてなされたものであり、
その目的とするところは、回転弁弁体の全閉動作
時、可動シートとの接触事故を確実に防止するこ
とにある。
The present invention has been made in view of the above,
The purpose of this is to reliably prevent accidental contact with the movable seat when the rotary valve body is fully closed.
即ち、本発明の特徴とするところは、回転弁全
閉検出用切換弁の１つが不動作であつても、他の
回転弁全閉検出用切換弁を用いて回転弁弁体が全
閉するまで側弁が全開位置に保持し、回転弁弁体
全閉後に可動シートを閉操作することにある。
That is, the feature of the present invention is that even if one of the rotary valve fully closed detection switching valves is inoperable, the rotary valve body is fully closed using the other rotary valve fully closed detection switching valve. The side valve is held in the fully open position until the rotary valve body is fully closed, and then the movable seat is closed.
以下本発明の一実施例を第２図によつて説明す
る。
An embodiment of the present invention will be described below with reference to FIG.
第２図は本発明に係る回転弁全閉検出用切換弁
の系統図を示す。１１′及び１１″は複数設けられ
た回転弁全閉検出用切換弁であり、レバー２１に
より切換えられる。回転弁全閉検出用切換弁１
１′のＨポートは管路G′に設けられた油切換弁１
７を切換える操作源として作用するよう油切換弁
１７の操作部分と連通している。また、回転弁全
閉検出用切換弁１１″のH′ポートは、油切換弁１
７を介して管路G′と連通している。１９は管路
Ｇに設けられた切換弁であり、管路G′の圧油で
切換えられるよう構成されている。１８及び２０
は油切換弁１７，１９を切換える圧縮ばねであ
る。 FIG. 2 shows a system diagram of the rotary valve fully closed detection switching valve according to the present invention. Reference numerals 11' and 11'' designate a plurality of rotary valve fully closed detection switching valves, which are switched by a lever 21. Rotary valve fully closed detection switching valve 1
1' H port is oil switching valve 1 installed in pipe G'
It communicates with the operating portion of the oil switching valve 17 so as to act as an operating source for switching the oil switching valve 7. In addition, the H' port of the rotary valve fully closed detection switching valve 11'' is connected to the oil switching valve 1.
It communicates with conduit G' via 7. Reference numeral 19 denotes a switching valve provided in the conduit G, which is configured to be switched by pressure oil in the conduit G'. 18 and 20
is a compression spring that switches the oil switching valves 17 and 19.
回転弁全閉検出用切換弁１１′が正常動作の場
合、回転弁弁体１２の全開によりレバー２１が上
動するため、回転弁全閉検出用切換弁１１′，１
１″はP′0圧油により切換えられ、Ｈポートを経て
切換弁１７からH′ポート、管路G′を経て、シー
ト切換弁６へ通じていた圧油は夫々T1，T2排油
ポートに通じ、油切換弁１７，１９は圧縮ばね１
８，２０により切換えられて、P0′圧油を管路Ｇ
を経て側弁開閉用切換弁２へ通じ、側弁１６を開
状態に保持する。回転弁弁体１２全閉時は、図示
の如くP0′圧油を管路G′よりシート切換弁６へ通
じ、可動シート７を全閉位置に操作せしめ、又、
管路Ｇの圧油を排油せしめて、側弁１６を全閉す
る。 When the rotary valve fully closed detection switching valve 11' is in normal operation, the lever 21 moves upward due to the rotary valve valve body 12 being fully opened.
1" is switched by P' 0 pressure oil, and the pressure oil that communicates from the switching valve 17 through the H port to the seat switching valve 6 via the H' port and pipe G' is T 1 and T 2 drain oil, respectively. The oil switching valves 17 and 19 are connected to the compression spring 1.
8 and 20, the P 0 'pressure oil is transferred to the pipe G.
It communicates with the side valve opening/closing switching valve 2 via the side valve 16, and keeps the side valve 16 open. When the rotary valve body 12 is fully closed, as shown in the figure, P 0 'pressure oil is passed from the pipe G' to the seat switching valve 6, and the movable seat 7 is operated to the fully closed position.
The pressure oil in the pipe G is drained and the side valve 16 is fully closed.
例えば、何等かの理由で、回転弁全閉検出用切
換弁１１′又は１１″の一方が動作不能となつた場
合の本装置の動作を下記する。 For example, the operation of the present device when one of the switching valves 11' or 11'' for detecting full closure of the rotary valve becomes inoperable for some reason will be described below.
回転弁全閉検出用切換弁１１′が生常に動き回
転弁全閉検出用切換弁１１″が不動作の場合につ
いて説明すると、回転弁弁体１２の全開によりレ
バー２１が上動し、P0′からＨポートへ通油して
いた圧油は切換弁１１′により切換えられ、Ｈポ
ートの圧油がT1排油ポートへ排油されるため、
油切換弁１７は圧縮ばね１８により切換えられ、
管路G′の圧油がT3排油ポートへ排油される。 To explain the case where the rotary valve fully closed detection switching valve 11' operates normally and the rotary valve fully closed detection switching valve 11'' is inoperative, the lever 21 moves upward when the rotary valve disc 12 is fully opened, and P 0 The pressure oil that was flowing from ' to the H port is switched by the switching valve 11', and the pressure oil at the H port is drained to the T1 oil drain port.
The oil switching valve 17 is switched by a compression spring 18,
Pressure oil in line G' is drained to the T3 oil drain port.
又管路G′に排油により、油切換弁１９も圧縮
ばね２０により切換えられ、P′0圧油は管路Ｇを
経て側弁開閉用切換弁２を開位置に保持する。回
転弁全閉検出用切換弁１１″が不動作のためP0′圧
油はH′ポートを経て、油切換弁１７へ通じるが
油切換弁１７の切換えによりブロツクされる。 Further, due to the drained oil in the pipe G', the oil switching valve 19 is also switched by the compression spring 20, and the P'0 pressure oil passes through the pipe G to maintain the side valve opening/closing switching valve 2 in the open position. Since the rotary valve fully closed detection switching valve 11'' is inoperative, the P 0 'pressure oil passes through the H' port to the oil switching valve 17, but is blocked by the switching of the oil switching valve 17.
回転弁弁体１２が全閉されると、図の如く回転
弁全閉検出用切換弁１１′が切換り、シート切換
弁６に圧油を通じせしめ可動シート７を全閉位置
に保持する。 When the rotary valve body 12 is fully closed, the rotary valve fully closed detection switching valve 11' switches as shown in the figure, causing pressure oil to flow through the seat switching valve 6 and holding the movable seat 7 in the fully closed position.
又、回転弁全閉検出用切換弁１１″が正常に動
作し、回転弁全閉検出用切換弁１１′が不動作の
場合は、同様にして、側弁１６の保持、シート切
換弁６の操作を行なうことが出来る。 Also, if the rotary valve fully closed detection switching valve 11'' operates normally and the rotary valve fully closed detection switching valve 11' does not operate, the side valve 16 is held and the seat switching valve 6 is held in the same manner. operations can be performed.
本発明によれば、回転弁弁体の全閉動作時、可
動シートとの接触事故を従来より確実に防止する
ことができる。
According to the present invention, it is possible to more reliably prevent accidental contact with the movable seat when the rotary valve body is fully closed than before.
第１図は従来例になる入口弁制御方法を用いた
際の入口弁開閉制御装置図、第２図は本発明にな
る制御方法を用いた際の制御装置の要部図であ
る。
１………入口弁開閉用電磁弁、２……側弁開閉
用切換弁、３……側弁用シリンダー、４……油切
換弁、５……水圧作用弁、６……シート切換弁、
７……可動シート、８……油切換弁、９……回転
弁切換弁、１０……回転弁用サーボシリンダー、
１１′，１１″……回転弁全閉検出用切換弁、１２
……回転弁弁体、１６……側弁、１７……油切換
弁、１８，２０……圧縮ばね、１９……油切換
弁、２１……レバー。
FIG. 1 is a diagram of an inlet valve opening/closing control device using a conventional inlet valve control method, and FIG. 2 is a diagram of main parts of the control device using a control method of the present invention. 1... Solenoid valve for inlet valve opening/closing, 2... Switching valve for side valve opening/closing, 3... Cylinder for side valve, 4... Oil switching valve, 5... Water pressure operation valve, 6... Seat switching valve,
7...Movable seat, 8...Oil switching valve, 9...Rotary valve switching valve, 10...Servo cylinder for rotary valve,
11', 11''...Switching valve for rotary valve fully closed detection, 12
... Rotary valve body, 16 ... Side valve, 17 ... Oil switching valve, 18, 20 ... Compression spring, 19 ... Oil switching valve, 21 ... Lever.
Claims (1)
ける入口弁であつて、弁箱とこの弁箱内に組込ま
れた流水方向に対して直角な軸まわりに回転して
弁を開閉する弁体と下流側にあつて軸方向に摺動
可能なシール用可動シートを有するものにおい
て、弁体の全閉位置を検出する複数個の切換弁
と、その夫々の切換弁の切替流体圧力により操作
される複数個の切換弁を設け、この切替流体圧力
により、回転弁弁体全閉まで側弁を全開位置に保
持し、回転弁弁体全閉後に可動シートを閉操作す
る入口弁制御方法。1 An inlet valve for a hydroelectric power plant having a water turbine and a pump-turbine, which includes a valve box, a valve body built into the valve box that rotates around an axis perpendicular to the direction of water flow to open and close the valve, and a downstream side. , which has a movable sealing seat that is slidable in the axial direction, and includes a plurality of switching valves that detect the fully closed position of the valve body, and a plurality of switching valves that are operated by switching fluid pressure of each switching valve. An inlet valve control method in which a switching valve is provided, a side valve is held in a fully open position when a rotary valve body is fully closed by the switching fluid pressure, and a movable seat is closed after the rotary valve body is fully closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11165277A JPS5445828A (en) | 1977-09-19 | 1977-09-19 | Method of controlling inlet valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11165277A JPS5445828A (en) | 1977-09-19 | 1977-09-19 | Method of controlling inlet valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5445828A JPS5445828A (en) | 1979-04-11 |
| JPS6112155B2 true JPS6112155B2 (en) | 1986-04-07 |
Family
ID=14566745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11165277A Granted JPS5445828A (en) | 1977-09-19 | 1977-09-19 | Method of controlling inlet valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5445828A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55155982A (en) * | 1979-05-23 | 1980-12-04 | Tokico Ltd | Valve device |
| JPS58187674U (en) * | 1982-06-10 | 1983-12-13 | 株式会社電業社機械製作所 | Valve opening/closing device |
-
1977
- 1977-09-19 JP JP11165277A patent/JPS5445828A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5445828A (en) | 1979-04-11 |
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