JP2018076888A5 - Hydraulic actuator system, fluid valve, steam turbine, and method of operating hydraulic actuator system - Google Patents
Hydraulic actuator system, fluid valve, steam turbine, and method of operating hydraulic actuator system Download PDFInfo
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- JP2018076888A5 JP2018076888A5 JP2016217371A JP2016217371A JP2018076888A5 JP 2018076888 A5 JP2018076888 A5 JP 2018076888A5 JP 2016217371 A JP2016217371 A JP 2016217371A JP 2016217371 A JP2016217371 A JP 2016217371A JP 2018076888 A5 JP2018076888 A5 JP 2018076888A5
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Description
本発明は、油圧アクチュエータシステム、流体弁、蒸気タービン、及び油圧アクチュエータシステムの運転方法に関する。 The present invention is a hydraulic actuator system, fluid valve, steam turbines, and a method of operation of a hydraulic actuator system.
そこで、本発明は、流体弁本体を短時間で急閉鎖させることの可能な油圧アクチュエータシステム、流体弁、蒸気タービン、及び油圧アクチュエータシステムの運転方法を提供することを目的とする。 The present invention aims at providing possible hydraulic actuator system that is suddenly closed fluid valve body in a short time, the fluid valves, steam turbines, and a method of operating a hydraulic actuator system.
上記課題を解決するため、本発明の一態様に係る油圧アクチュエータシステムによれば、流体弁本体用の油圧アクチュエータシステムであって、シリンダ、及び前記シリンダ内をヘッド側室とロッド側室とに区切るピストンロッド、及び前記シリンダから前記ピストンロッドを突出させる方向に付勢する弾性部を有する油圧アクチュエータと、前記ヘッド側室と前記ロッド側室とを接続しており、油が移動する管路と、前記管路に設けられており、正逆回転可能な油圧ポンプと、前記管路のうち、前記油圧ポンプと前記ロッド側室との間から分岐されており、前記油圧ポンプをバイパスするように、先端が前記管路と接続されたバイパス用管路と、前記バイパス用管路に設けられた切換弁と、前記管路のうち、前記バイパス用管路の分岐位置と前記油圧ポンプとの間から分岐した分岐用管路と、前記分岐用管路と接続されたアキュムレータと、前記分岐用管路に設けられた開閉弁と、前記油圧ポンプ、前記切換弁、前記開閉弁を制御する制御装置と、を備える。 According to one embodiment of the present invention, there is provided a hydraulic actuator system for a fluid valve body, comprising: a cylinder; and a piston rod that divides the inside of the cylinder into a head chamber and a rod chamber. And a hydraulic actuator having an elastic portion that urges the piston rod from the cylinder in a direction to project the piston rod, the head side chamber and the rod side chamber are connected to each other, and a pipeline in which oil moves, A hydraulic pump that is rotatable in the forward and reverse directions, and of the pipeline, branches off from between the hydraulic pump and the rod-side chamber, and a tip of the pipeline is bypassed so as to bypass the hydraulic pump. A bypass pipe connected to the bypass pipe, a switching valve provided in the bypass pipe, and a branch position of the bypass pipe among the pipes. A branch pipe branched from between the hydraulic pump, an accumulator connected to the branch pipe, an open / close valve provided in the branch pipe, the hydraulic pump, the switching valve, and the open / close valve. obtain Bei and a control device for controlling the valve.
また、上記本発明の一態様に係る油圧アクチュエータシステムにおいて、前記制御装置は、通常運転時には前記切換弁を閉じるとともに前記開閉弁を開き、急閉鎖指令を受信後に、前記開閉弁を閉じた後に前記切換弁を開いてもよい。
このように、急閉鎖指令を制御装置が受信後に、開閉弁を閉じた後に切換弁を開くことで、アキュムレータ内の高圧の油が管路内に移動することを抑制可能となるので、ヘッド側室内の油をロッド側室内に容易に導入させることができる。
Further, in the hydraulic actuator system according to one aspect of the present invention, the control device closes the switching valve and opens the open / close valve during normal operation, receives the sudden close command, and closes the open / close valve. The switching valve may be opened.
As described above, after the control device receives the sudden closing command, the switching valve is opened after the on-off valve is closed, so that the high-pressure oil in the accumulator can be prevented from moving into the pipeline. The oil in the room can be easily introduced into the rod side room.
本発明によれば、急閉鎖指令を受信後、弁体と弁座とを短時間で接触させることが可能となるので、蒸気タービンに流れる蒸気を短時間で遮断することができる。
上記課題を解決するため、本発明の一態様に係る油圧アクチュエータシステムの運転方法によれば、シリンダ、及び前記シリンダ内をヘッド側室とロッド側室とに区切るピストンロッド、及び前記シリンダから前記ピストンロッドを突出させる方向に付勢する弾性部を有する油圧アクチュエータと、前記ヘッド側室と前記ロッド側室とを接続しており、油が移動する管路と、前記管路に設けられており、正逆回転可能な油圧ポンプと、前記管路のうち、前記油圧ポンプと前記ロッド側室との間から分岐されており、前記油圧ポンプをバイパスするように、先端が前記管路と接続されたバイパス用管路と、前記バイパス用管路に設けられた切換弁と、前記管路のうち、前記バイパス用管路の分岐位置と前記油圧ポンプとの間から分岐した分岐用管路と、前記分岐用管路と接続されたアキュムレータと、前記分岐用管路に設けられた開閉弁と、前記油圧ポンプ、前記切換弁、前記開閉弁を制御する制御装置と、を備える 油圧アクチュエータシステムの運転方法であって、前記制御装置は、通常運転時には前記切換弁を閉じるとともに前記開閉弁を開くステップと、急閉鎖指令を受信後に、前記開閉弁を閉じた後に前記切換弁を開くステップと、を含む。
また、上記本発明の一態様に係る油圧アクチュエータシステムの運転方法において、前記制御装置は、前記急閉鎖指令を受信後に前記開閉弁を閉じたことを検知した段階、或いは前記急閉鎖指令を受信後に所定時間が経過した段階で、前記切換弁を開いてもよい。
また、上記本発明の一態様に係る油圧アクチュエータシステムの運転方法において、前記油圧アクチュエータシステムは、前記分岐用管路に設けられ、前記アキュムレータ内の圧力を検出する圧力検出部を有しており、前記制御装置は、通常運転時に前記アキュムレータ内の圧力が下限閾値よりも低下した際に前記油圧ポンプを駆動させ、前記油圧ポンプの駆動中に前記アキュムレータ内の圧力が前記下限閾値よりも大きい上限閾値を超えた際に前記油圧ポンプを停止させてもよい。
According to the present invention, the valve body and the valve seat can be brought into contact in a short time after receiving the sudden closing command, so that the steam flowing through the steam turbine can be cut off in a short time.
In order to solve the above problems, according to a method for operating a hydraulic actuator system according to one aspect of the present invention, a cylinder, a piston rod that divides the inside of the cylinder into a head side chamber and a rod side chamber, and the piston rod from the cylinder. A hydraulic actuator having an elastic portion that urges in a direction in which it projects, the head-side chamber and the rod-side chamber being connected to each other, and a pipe in which oil moves, and provided in the pipe, and capable of rotating forward and backward. A hydraulic pump, and a bypass pipe that is branched from between the hydraulic pump and the rod-side chamber of the pipe, and has a tip connected to the pipe so as to bypass the hydraulic pump. A switching valve provided in the bypass pipe, and a branch valve branched from between the branch position of the bypass pipe and the hydraulic pump in the pipe. A hydraulic actuator comprising: a path, an accumulator connected to the branch pipe, an on-off valve provided in the branch pipe, and a control device for controlling the hydraulic pump, the switching valve, and the on-off valve. An operation method of a system, wherein the control device closes the switching valve and opens the on-off valve during normal operation, and opens the on-off valve after closing the on-off valve after receiving a sudden closing command. And
Further, in the operating method of the hydraulic actuator system according to one aspect of the present invention, the control device detects that the on-off valve is closed after receiving the sudden closing command, or after receiving the sudden closing command. The switching valve may be opened after a predetermined time has elapsed.
Further, in the operating method of the hydraulic actuator system according to one aspect of the present invention, the hydraulic actuator system includes a pressure detecting unit that is provided in the branch pipeline and detects a pressure in the accumulator, The control device drives the hydraulic pump when the pressure in the accumulator falls below a lower threshold during normal operation, and an upper threshold in which the pressure in the accumulator is larger than the lower threshold during driving of the hydraulic pump. The hydraulic pump may be stopped when the pressure exceeds.
Claims (9)
シリンダ、及び前記シリンダ内をヘッド側室とロッド側室とに区切るピストンロッド、及び前記シリンダから前記ピストンロッドを突出させる方向に付勢する弾性部を有する油圧アクチュエータと、
前記ヘッド側室と前記ロッド側室とを接続しており、油が移動する管路と、
前記管路に設けられており、正逆回転可能な油圧ポンプと、
前記管路のうち、前記油圧ポンプと前記ロッド側室との間から分岐されており、前記油圧ポンプをバイパスするように、先端が前記管路と接続されたバイパス用管路と、
前記バイパス用管路に設けられた切換弁と、
前記管路のうち、前記バイパス用管路の分岐位置と前記油圧ポンプとの間から分岐した分岐用管路と、
前記分岐用管路と接続されたアキュムレータと、
前記分岐用管路に設けられた開閉弁と、
前記油圧ポンプ、前記切換弁、前記開閉弁を制御する制御装置と、
を備える油圧アクチュエータシステム。 A hydraulic actuator system for a fluid valve body,
A hydraulic actuator having a cylinder, a piston rod partitioning the inside of the cylinder into a head-side chamber and a rod-side chamber, and an elastic portion for urging the piston rod to project from the cylinder;
A pipe that connects the head side chamber and the rod side chamber and that moves oil;
A hydraulic pump provided in the pipeline and capable of rotating forward and reverse,
Of the pipeline, a bypass pipeline branched from between the hydraulic pump and the rod-side chamber and having a distal end connected to the pipeline so as to bypass the hydraulic pump,
A switching valve provided in the bypass pipe line,
Of the pipelines, a branch pipeline branched from between a branch position of the bypass pipeline and the hydraulic pump,
An accumulator connected to the branch conduit;
An on-off valve provided in the branch conduit;
A control device for controlling the hydraulic pump, the switching valve, and the on-off valve;
Bei obtain hydraulic actuator system.
前記ピストンロッドは、ロッド本体と、前記ロッド本体に設けられ、前記シリンダ内を前記ヘッド側室と前記ロッド側室とに区切るピストンと、を備え、
前記制御装置は、通常運転時に前記アキュムレータ内の圧力が下限閾値よりも低下した際に前記油圧ポンプを駆動させ、前記油圧ポンプの駆動中に前記アキュムレータ内の圧力が前記下限閾値よりも大きい上限閾値を超えた際に前記油圧ポンプを停止させる、請求項１ないし３のうち、いずれか１項記載の油圧アクチュエータシステム。 It is provided in the branch pipe, and has a pressure detecting unit for detecting the pressure in the accumulator,
The piston rod includes a rod body, a piston provided in the rod body, and a piston that divides the inside of the cylinder into the head side chamber and the rod side chamber,
The control device drives the hydraulic pump when the pressure in the accumulator falls below a lower threshold during normal operation, and an upper threshold in which the pressure in the accumulator is larger than the lower threshold during driving of the hydraulic pump. The hydraulic actuator system according to any one of claims 1 to 3 , wherein the hydraulic pump is stopped when the pressure exceeds a predetermined value.
前記ピストンロッドの先端に設けられた弁体と、流体が導入される流体導入口、及び前記弁体が当接される弁座を含み、前記弁体を収容する弁ケースと、を含む流体弁本体と、
を備えた流体弁。 A hydraulic actuator system according to any one of claims 1 to 4 ,
A fluid valve including a valve body provided at the tip of the piston rod, a fluid inlet through which fluid is introduced, and a valve case that contains the valve body and that includes a valve seat with which the valve body abuts. Body and
Fluid valve with.
前記流体弁を介して供給される前記流体である蒸気によって駆動されるタービン本体と、
を備える蒸気タービン。 A fluid valve according to claim 5 ,
A turbine body driven by the fluid steam supplied through the fluid valve;
A steam turbine comprising:
前記ヘッド側室と前記ロッド側室とを接続しており、油が移動する管路と、 A pipe connecting the head-side chamber and the rod-side chamber, through which oil moves;
前記管路に設けられており、正逆回転可能な油圧ポンプと、 A hydraulic pump provided in the pipeline and capable of rotating forward and reverse,
前記管路のうち、前記油圧ポンプと前記ロッド側室との間から分岐されており、前記油圧ポンプをバイパスするように、先端が前記管路と接続されたバイパス用管路と、 Of the pipeline, a bypass pipeline that is branched from between the hydraulic pump and the rod-side chamber and has a distal end connected to the pipeline so as to bypass the hydraulic pump,
前記バイパス用管路に設けられた切換弁と、 A switching valve provided in the bypass pipe line,
前記管路のうち、前記バイパス用管路の分岐位置と前記油圧ポンプとの間から分岐した分岐用管路と、 Of the pipelines, a branch pipeline branched from between a branch position of the bypass pipeline and the hydraulic pump,
前記分岐用管路と接続されたアキュムレータと、 An accumulator connected to the branch conduit;
前記分岐用管路に設けられた開閉弁と、 An on-off valve provided in the branch conduit;
前記油圧ポンプ、前記切換弁、前記開閉弁を制御する制御装置と、 A control device for controlling the hydraulic pump, the switching valve, and the on-off valve;
を備える 油圧アクチュエータシステムの運転方法であって、 A method of operating a hydraulic actuator system comprising:
前記制御装置は、通常運転時には前記切換弁を閉じるとともに前記開閉弁を開くステップと、 The controller closes the switching valve and opens the on-off valve during normal operation,
急閉鎖指令を受信後に、前記開閉弁を閉じた後に前記切換弁を開くステップと、 After receiving the sudden closing command, opening the switching valve after closing the on-off valve,
を含む油圧アクチュエータシステムの運転方法。 The operation method of the hydraulic actuator system including the method.
前記制御装置は、前記急閉鎖指令を受信後に前記開閉弁を閉じたことを検知した段階、或いは前記急閉鎖指令を受信後に所定時間が経過した段階で、前記切換弁を開く、油圧アクチュエータシステムの運転方法。 The controller is configured to open the switching valve at a stage where it is detected that the on-off valve is closed after receiving the sudden close command or at a stage where a predetermined time has elapsed after receiving the sudden close command. how to drive.
前記油圧アクチュエータシステムは、前記分岐用管路に設けられ、前記アキュムレータ内の圧力を検出する圧力検出部を有しており、 The hydraulic actuator system is provided in the branch pipeline, and has a pressure detection unit that detects a pressure in the accumulator,
前記制御装置は、通常運転時に前記アキュムレータ内の圧力が下限閾値よりも低下した際に前記油圧ポンプを駆動させ、前記油圧ポンプの駆動中に前記アキュムレータ内の圧力が前記下限閾値よりも大きい上限閾値を超えた際に前記油圧ポンプを停止させる、油圧アクチュエータシステムの運転方法。 The control device drives the hydraulic pump when the pressure in the accumulator falls below a lower threshold during normal operation, and an upper threshold in which the pressure in the accumulator is larger than the lower threshold during driving of the hydraulic pump. Operating the hydraulic actuator system when the hydraulic pump is exceeded.
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| JP2016217371A JP6861501B2 (en) | 2016-11-07 | 2016-11-07 | How to operate hydraulic actuator systems, fluid valves, steam turbines, and hydraulic actuator systems |
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| JP2016217371A JP6861501B2 (en) | 2016-11-07 | 2016-11-07 | How to operate hydraulic actuator systems, fluid valves, steam turbines, and hydraulic actuator systems |
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| JP2018076888A JP2018076888A (en) | 2018-05-17 |
| JP2018076888A5 true JP2018076888A5 (en) | 2019-12-19 |
| JP6861501B2 JP6861501B2 (en) | 2021-04-21 |
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