Mechanical-hydraulic controller monitoring device, control system, and mechanical-hydraulic controller monitoring method

Abstract

To determine failure signs and failure factors of a mechanical-hydraulic controller.SOLUTION: A mechanical-hydraulic controller monitoring device according to an embodiment includes: a recording part that records a measurement value of the opening of an adjustment valve and a measurement value of the opening of an activation device in association with each other; and a setting part in which a reference value of the opening of the adjustment valve and a reference value of the opening of the activation device are set in association with each other. The mechanical-hydraulic controller monitoring device also includes an alarm part that outputs an alarm for the mechanical-hydraulic controller based on the measurement value of the opening of the activation device, the reference value of the opening of the activation device, and a set value for determining a relationship between the measurement value of the opening of the activation device and the reference value of the opening of the activation device.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] FIELD OF THE DISCLOSURE The present invention relates to a machine hydraulic control device monitoring device, a control system, and a machine hydraulic control device monitoring method. [Background technology]

[0002] Mechanical hydraulic control devices are known that are used in power plants and control regulator valves that control fluid for turbines. Mechanical hydraulic control devices can fail due to a variety of factors. When a mechanical hydraulic control device fails in a power plant, the power plant is shut down unplanned and each part is inspected, including an open inspection of the mechanical hydraulic control device. Depending on the location and severity of the failure as a result of the investigation, the power plant may be shut down for an extended period of time to perform recovery measures such as repairs and part replacement. For this reason, there is a market need to prevent unplanned shutdowns of power plants in order to maintain the operating rate of the power plant.

[0003] Therefore, there is a need for a technology that can determine the signs of failure and the causes of failure of a mechanical hydraulic control device before the failure of the mechanical hydraulic control device actually occurs. Such a technology can prevent unplanned shutdowns of a power plant, prepare solutions to the causes of failure before the shutdown of the power plant, and shorten the shutdown period of the power plant. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-131923 A Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been made in consideration of these points, and aims to provide a mechanical hydraulic control device monitoring device, a control system, and a mechanical hydraulic control device monitoring method that are capable of determining signs of failure and the causes of failure in a mechanical hydraulic control device. [Means for solving the problem]

[0006] A mechanical hydraulic control device monitoring device according to an embodiment is a device for monitoring a mechanical hydraulic control device that controls a regulator valve that controls a fluid for a turbine, the mechanical hydraulic control device including a hydraulic relay that operates when control oil is supplied thereto, a control oil supply unit that supplies the control oil to the hydraulic relay, a control oil supply valve that supplies the control oil to the control oil supply unit and controls the amount of control oil supplied to the control oil supply unit, and a start-up device that controls the control oil supply valve. The mechanical hydraulic control device monitoring device includes a recording unit that records a measured value of the opening of the regulator valve and a measured value of the opening of the start-up device in association with each other, and a setting unit that sets a reference value of the opening of the regulator valve and a reference value of the opening of the start-up device in association with each other. The mechanical hydraulic control device monitoring device also includes an alarm unit that outputs an alarm for the mechanical hydraulic control device based on the measured value of the opening of the start-up device, the reference value of the opening of the start-up device, and a setting value for determining a relationship between the measured value of the opening of the start-up device and the reference value of the opening of the start-up device.

[0007] A mechanical hydraulic control device monitoring device according to an embodiment is a device for monitoring a mechanical hydraulic control device that controls a regulator valve that controls a fluid for a turbine, the mechanical hydraulic control device including a hydraulic relay that operates when control oil is supplied thereto, a control oil supply unit that supplies the control oil to the hydraulic relay, a control oil supply valve that supplies the control oil to the control oil supply unit and controls the amount of control oil supplied to the control oil supply unit, and a synchronizer that controls the control oil supply unit. The mechanical hydraulic control device monitoring device includes a recording unit that records a measured value of the opening of the regulator valve and a measured value of the opening of the synchronizer in association with each other, and a setting unit that sets a reference value of the opening of the regulator valve and a reference value of the opening of the synchronizer in association with each other. The mechanical hydraulic control device monitoring device also includes an alarm unit that outputs an alarm for the mechanical hydraulic control device based on the measured value of the opening of the synchronizer, the reference value of the opening of the synchronizer, and a setting value for determining a relationship between the measured value of the opening of the synchronizer and the reference value of the opening of the synchronizer.

[0008] A mechanical hydraulic control device monitoring device according to an embodiment is a device for monitoring a mechanical hydraulic control device that controls a regulator valve that controls a fluid for a turbine, the mechanical hydraulic control device including a hydraulic relay that operates when control oil is supplied thereto, a control oil supply unit that supplies the control oil to the hydraulic relay, a control oil supply valve that supplies the control oil to the control oil supply unit and controls the amount of control oil supplied to the control oil supply unit, and a start-up device that controls the control oil supply valve. The mechanical hydraulic control device monitoring device includes a recording unit that records a measured value of the opening of the control oil supply valve and a measured value of the opening of the start-up device in association with each other, and a setting unit that sets a reference value of the opening of the control oil supply valve and a reference value of the opening of the start-up device in association with each other. The mechanical hydraulic control device monitoring device also includes an alarm unit that outputs an alarm for the mechanical hydraulic control device based on the measured value of the opening of the control oil supply valve, the reference value of the opening of the control oil supply valve, and a setting value for determining a relationship between the measured value of the opening of the control oil supply valve and the reference value of the opening of the control oil supply valve.

[0009] A mechanical hydraulic control device monitoring device according to an embodiment is a device for monitoring a mechanical hydraulic control device that controls a regulator valve that controls a fluid for a turbine, the mechanical hydraulic control device including a hydraulic relay that operates when control oil is supplied thereto, a control oil supply unit that supplies the control oil to the hydraulic relay, a control oil supply valve that supplies the control oil to the control oil supply unit and controls the amount of control oil supplied to the control oil supply unit, a synchronizer that controls the control oil supply unit, and a start-up device that controls the control oil supply valve. The mechanical hydraulic control device monitoring device includes a recording unit that records a measurement value of the opening of the regulator valve and a measurement value of the opening of the start-up device in association with each other, records a measurement value of the opening of the regulator valve and a measurement value of the opening of the synchronizer in association with each other, and records a measurement value of the opening of the control oil supply valve and a measurement value of the opening of the start-up device in association with each other. The mechanical hydraulic control device monitoring device also includes a setting unit in which a reference value for the opening of the regulating valve and a reference value for the opening of the starting device are set in correspondence with each other, a reference value for the opening of the regulating valve and a reference value for the opening of the synchronizing device are set in correspondence with each other, and a reference value for the opening of the control oil supply valve and a reference value for the opening of the starting device are set in correspondence with each other.The mechanical hydraulic control device monitoring device also includes a display unit that determines and displays a cause of a failure of the mechanical hydraulic control device based on a measured value of the opening of the starting device, the reference value of the opening of the starting device, a set value for determining a relationship between the measured value of the opening of the starting device and the reference value of the opening of the starting device, a measured value of the opening of the synchronizing device, the reference value of the opening of the synchronizing device, a set value for determining a relationship between the measured value of the opening of the synchronizing device and the reference value of the opening of the synchronizing device, a measured value of the opening of the control oil supply valve, the reference value of the opening of the control oil supply valve, and a set value for determining a relationship between the measured value of the opening of the control oil supply valve and the reference value of the opening of the control oil supply valve.

[0010] Moreover, the control system according to the embodiment includes a regulator valve, a mechanical hydraulic control device, and the mechanical hydraulic control device monitoring device described above.

[0011] A method for monitoring a mechanical hydraulic control device according to an embodiment is a method for monitoring a mechanical hydraulic control device that controls a regulator valve that controls a fluid for a turbine, the mechanical hydraulic control device including a hydraulic relay that operates when control oil is supplied thereto, a control oil supply unit that supplies the control oil to the hydraulic relay, a control oil supply valve that supplies the control oil to the control oil supply unit and controls the amount of control oil supplied to the control oil supply unit, and a start-up device that controls the control oil supply valve. The mechanical hydraulic control device monitoring method records a measured value of the opening of the regulator valve and a measured value of the opening of the start-up device in a recording unit in association with each other, and obtains a reference value of the opening of the start-up device from a setting unit in which a reference value of the opening of the regulator valve and a reference value of the opening of the start-up device are set in association with each other. The mechanical hydraulic control device monitoring method also outputs an alarm for the mechanical hydraulic control device from the alarm unit based on the measured value of the opening of the start-up device, the reference value of the opening of the start-up device, and a setting value for determining a relationship between the measured value of the opening of the start-up device and the reference value of the opening of the start-up device.

[0012] A method for monitoring a mechanical hydraulic control device according to an embodiment is a method for monitoring a mechanical hydraulic control device that controls a regulator valve that controls a fluid for a turbine, the mechanical hydraulic control device including a hydraulic relay that operates when control oil is supplied thereto, a control oil supply unit that supplies the control oil to the hydraulic relay, a control oil supply valve that supplies the control oil to the control oil supply unit and controls the amount of control oil supplied to the control oil supply unit, and a synchronizer that controls the control oil supply unit. The mechanical hydraulic control device monitoring method records a measured value of the opening of the regulator valve and a measured value of the opening of the synchronizer in a corresponding relationship in a recording unit, and obtains a reference value of the opening of the synchronizer from a setting unit in which a reference value of the opening of the regulator valve and a reference value of the opening of the synchronizer are set in a corresponding relationship. The mechanical hydraulic control device monitoring method also outputs an alarm for the mechanical hydraulic control device from an alarm unit based on the measured value of the opening of the synchronizer, the reference value of the opening of the synchronizer, and a setting value for determining a relationship between the measured value of the opening of the synchronizer and the reference value of the opening of the synchronizer.

[0013] A mechanical hydraulic control device monitoring method according to an embodiment is a mechanical hydraulic control device that controls a regulator valve that controls a fluid for a turbine, the mechanical hydraulic control device including a hydraulic relay that operates when control oil is supplied thereto, a control oil supply unit that supplies the control oil to the hydraulic relay, a control oil supply valve that supplies the control oil to the control oil supply unit and controls the amount of control oil supplied to the control oil supply unit, and a start-up device that controls the control oil supply valve. The mechanical hydraulic control device monitoring method records a measured value of the opening of the control oil supply valve and a measured value of the opening of the start-up device in a corresponding relationship in a recording unit, and obtains a reference value of the opening of the control oil supply valve from a setting unit in which a reference value of the opening of the control oil supply valve and a reference value of the opening of the start-up device are set in a corresponding relationship. The mechanical hydraulic control device monitoring method also outputs an alarm for the mechanical hydraulic control device from an alarm unit based on the measured value of the opening of the control oil supply valve, the reference value of the opening of the control oil supply valve, and a setting value for determining a relationship between the measured value of the opening of the control oil supply valve and the reference value of the opening of the control oil supply valve.

[0014] A mechanical hydraulic control device monitoring method according to an embodiment is a method for monitoring a mechanical hydraulic control device that controls a regulator valve that controls a fluid for a turbine, the mechanical hydraulic control device including a hydraulic relay that operates when control oil is supplied thereto, a control oil supply unit that supplies the control oil to the hydraulic relay, a control oil supply valve that supplies the control oil to the control oil supply unit and controls the amount of control oil supplied to the control oil supply unit, a synchronizer that controls the control oil supply unit, and a start-up device that controls the control oil supply valve. The mechanical hydraulic control device monitoring method records a measured value of the opening of the regulator valve and a measured value of the opening of the start-up device in a corresponding relationship in a recording unit, and obtains a reference value of the opening of the start-up device from a setting unit in which a reference value of the opening of the regulator valve and a reference value of the opening of the start-up device are set in a corresponding relationship. The mechanical hydraulic control device monitoring method also records a measured value of the opening of the regulator valve and a measured value of the opening of the synchronizer in a corresponding relationship in a recording unit, and obtains a reference value of the opening of the synchronizer from a setting unit in which a reference value of the opening of the regulator valve and a reference value of the opening of the synchronizer are set in a corresponding relationship. The mechanical hydraulic control device monitoring method also includes recording a measured value of the opening of the control oil supply valve and a measured value of the opening of the starting device in a corresponding manner in a recording unit, and acquiring a reference value of the opening of the control oil supply valve from a setting unit in which a reference value of the opening of the control oil supply valve and a reference value of the opening of the starting device are set in a corresponding manner. The mechanical hydraulic control device monitoring method also includes determining a cause of a failure of the mechanical hydraulic control device based on the measured value of the opening of the starting device, the reference value of the opening of the starting device, a set value for determining a relationship between the measured value of the opening of the starting device and the reference value of the opening of the starting device, the measured value of the opening of the synchronizing device, the reference value of the opening of the synchronizing device, a set value for determining a relationship between the measured value of the opening of the synchronizing device and the reference value of the opening of the synchronizing device, the measured value of the opening of the control oil supply valve, the reference value of the opening of the control oil supply valve, and a set value for determining a relationship between the measured value of the opening of the control oil supply valve and the reference value of the opening of the control oil supply valve. Effect of the Invention

[0015] According to the present invention, it is possible to determine the signs of failure and the causes of failure in a mechanical hydraulic control device. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a schematic configuration diagram of a control system according to a first embodiment. [Diagram 2] FIG. 2 is a graph for explaining monitoring of the mechanical hydraulic control device according to the first embodiment. [Diagram 3] FIG. 3 is a graph for explaining monitoring of the mechanical hydraulic control device according to the first embodiment. [Figure 4] FIG. 4 is a graph for explaining monitoring of the mechanical hydraulic control device according to the first embodiment. [Diagram 5] FIG. 5 is a graph for explaining monitoring of the mechanical hydraulic control device according to the second embodiment. [Figure 6] FIG. 6 is a graph for explaining monitoring of the mechanical hydraulic control device according to the second embodiment. [Figure 7] FIG. 7 is a graph for explaining monitoring of the mechanical hydraulic control device according to the second embodiment. [Figure 8] FIG. 8 is a graph for explaining monitoring of the mechanical hydraulic control device according to the third embodiment. [Figure 9] FIG. 9 is a graph for explaining monitoring of the mechanical hydraulic control device according to the third embodiment. [Figure 10] FIG. 10 is a flowchart for explaining monitoring of the mechanical hydraulic control device according to the fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a mechanical hydraulic control device monitoring device, a control system, and a mechanical hydraulic control device monitoring method according to embodiments of the present invention will be described with reference to the drawings.

[0018] (First embodiment) A mechanical hydraulic control device monitoring device, a control system, and a mechanical hydraulic control device monitoring method according to a first embodiment will be described with reference to Figs. 1 to 4.

[0019] First, the schematic configuration of a control system according to the present embodiment will be described with reference to FIG.

[0020] Fig. 1 is a schematic configuration diagram of a control system according to this embodiment. The control system 1 is used in, for example, a power generation plant. The control system 1 is a system that controls a fluid for a turbine. Examples of the fluid for the turbine include steam used in a steam turbine and fuel gas used in a gas turbine.

[0021] As shown in FIG. 1, the control system 1 includes a regulator valve 2, a mechanical hydraulic control device 10, and a monitoring device 30 (mechanical hydraulic control device monitoring device).

[0022] The regulating valve 2 is a valve that controls the fluid for the turbine. The regulating valve 2 controls the amount of fluid supplied to the turbine by changing its opening. The regulating valve 2 is connected to a mechanical hydraulic control device 10 via a hydraulic drive device 3 and a drive mechanism 6.

[0023] The hydraulic drive device 3 includes a pilot valve 4 and a hydraulic drive unit 5. The pilot valve 4 is connected to a speed relay 16 and the hydraulic drive unit 5 of a machine hydraulic control device 10 described below. The pilot valve 4 supplies control oil to the hydraulic drive unit 5 and controls the amount of control oil supplied to the hydraulic drive unit 5. The pilot valve 4 is controlled by the speed relay 16. The hydraulic drive unit 5 is connected to the pilot valve 4 and a drive mechanism 6. The hydraulic drive unit 5 controls the drive mechanism 6. The hydraulic drive unit 5 controls the regulator valve 2 via the drive mechanism 6. The hydraulic drive unit 5 operates when control oil is supplied from the pilot valve 4, and controls the drive mechanism 6.

[0024] The drive mechanism 6 is a lever link mechanism that mechanically connects the hydraulic drive device 3 and the regulator valve 2. The drive mechanism 6 is connected to the hydraulic drive unit 5 of the hydraulic drive device 3 and the regulator valve 2. The drive mechanism 6 operates under the control of the hydraulic drive unit 5, and controls the regulator valve 2.

[0025] The drive mechanism 6 is provided with a regulator valve opening detector 7. The regulator valve opening detector 7 measures the opening of the regulator valve 2. The regulator valve opening detector 7 is connected to a recording unit 31 of a monitoring device 30, which will be described later. The regulator valve opening detector 7 outputs the measurement value of the opening of the regulator valve 2 to the recording unit 31 of the monitoring device 30.

[0026] The mechanical hydraulic control device 10 is a device that controls the regulating valve 2. The mechanical hydraulic control device 10 controls the regulating valve 2 via the hydraulic drive device 3 and the drive mechanism 6. The mechanical hydraulic control device 10 includes a governor drive gear device 11, a speed regulating rotation unit 12, a rotary pilot valve sleeve 13 (control oil supply unit), a rotary pilot valve 14, an auxiliary pilot valve 15 (control oil supply valve), a speed relay 16 (hydraulic relay), a starting device 18, and a synchronizing device 19.

[0027] The governor drive gear device 11 is connected to the turbine and the speed-governing rotation part 12. The governor drive gear device 11 transmits the rotation speed of the turbine to the speed-governing rotation part 12.

[0028] The speed governing rotation unit 12 is connected to the governor drive gear device 11 and the rotary pilot valve 14. The speed governing rotation unit 12 converts the turbine rotation speed transmitted from the governor drive gear device 11 into position information (vertical position) and transmits it to the rotary pilot valve 14.

[0029] The rotary pilot valve sleeve 13 is located around the rotary pilot valve 14. The rotary pilot valve sleeve 13 supplies control oil to the speed relay 16. The rotary pilot valve sleeve 13 has an inlet and an outlet for the control oil, and the control oil passes through the inside of the rotary pilot valve sleeve 13. The rotary pilot valve sleeve 13 is connected to the auxiliary pilot valve 15 and the speed relay 16. The rotary pilot valve sleeve 13 is supplied with control oil from the auxiliary pilot valve 15. The rotary pilot valve sleeve 13 supplies the control oil supplied from the auxiliary pilot valve 15 to the speed relay 16. The rotary pilot valve sleeve 13 can also adjust the amount of control oil supplied to the speed relay 16. The rotary pilot valve sleeve 13 is connected to a synchronizer 19. The rotary pilot valve sleeve 13 moves in the vertical direction under the control of the synchronizer 19. By moving in the vertical direction, the rotary pilot valve sleeve 13 changes the oil passage area of ​​the inlet and outlet of the control oil, and changes the amount of control oil supplied to the speed relay 16.

[0030] The rotary pilot valve 14 is located inside the rotary pilot valve sleeve 13. The rotary pilot valve 14 is connected to the speed control rotation unit 12, and moves up and down in response to the rotation speed of the turbine. By moving up and down, the rotary pilot valve 14 changes the oil passage area of ​​the control oil inlet and outlet of the rotary pilot valve sleeve 13, and changes the amount of control oil supplied from the rotary pilot valve sleeve 13 to the speed relay 16. In other words, the rotary pilot valve 14 controls the amount of control oil supplied from the rotary pilot valve sleeve 13 to the speed relay 16 in response to the rotation speed of the turbine.

[0031] The auxiliary pilot valve 15 is connected to the rotary pilot valve sleeve 13. The auxiliary pilot valve 15 forms a hydraulic circuit in series with the speed relay 16 and the rotary pilot valve sleeve 13. The auxiliary pilot valve 15 supplies control oil to the rotary pilot valve sleeve 13. That is, the auxiliary pilot valve 15 supplies control oil to the speed relay 16 via the rotary pilot valve sleeve 13. The auxiliary pilot valve 15 supplies control oil to the rotary pilot valve sleeve 13 and controls the amount of control oil supplied to the rotary pilot valve sleeve 13. That is, the auxiliary pilot valve 15 controls the amount of control oil supplied to the speed relay 16. The auxiliary pilot valve 15 is also connected to the starting device 18. The auxiliary pilot valve 15 is controlled by the starting device 18.

[0032] The auxiliary pilot valve 15 is provided with an auxiliary pilot valve opening detector 20. The auxiliary pilot valve opening detector 20 measures the opening (stroke) of the auxiliary pilot valve 15. The auxiliary pilot valve opening detector 20 is connected to a recording unit 31 of a monitoring device 30, which will be described later. The auxiliary pilot valve opening detector 20 outputs a measurement value of the opening of the auxiliary pilot valve 15 to the recording unit 31 of the monitoring device 30.

[0033] The speed relay 16 is connected to the rotary pilot valve sleeve 13 and the pilot valve 4 of the hydraulic drive unit 3. The speed relay 16 controls the regulating valve 2 via the hydraulic drive unit 3 and the drive mechanism 6. The speed relay 16 is operated by the supply of control oil from the rotary pilot valve sleeve 13. The speed relay 16 has an internal spring, and the stroke changes when control oil is supplied to the bottom of the piston against the spring force. The speed relay 16 operates the pilot valve 4 of the hydraulic drive unit 3 by this change in stroke.

[0034] In this way, the mechanical hydraulic control device 10 uses the stroke of the speed relay 16 as an output to operate the regulator valve 2 via the hydraulic drive device 3 and drive mechanism 6, thereby controlling the amount of fluid supplied to the turbine. The stroke of the speed relay 16 is controlled by either the rotary pilot valve 14, which operates according to the turbine speed, or the auxiliary pilot valve 15 or rotary pilot valve sleeve 13 (lower value priority: the one with the lower set value). The auxiliary pilot valve 15 is controlled by a starter device 18, and the rotary pilot valve sleeve 13 is controlled by a synchronizer device 19.

[0035] The starting device 18 is connected to the auxiliary pilot valve 15. The starting device 18 controls the auxiliary pilot valve 15. The starting device 18 controls and operates the auxiliary pilot valve 15, and controls the amount of control oil supplied to the rotary pilot valve sleeve 13. As a result, the starting device 18 controls the amount of control oil supplied to the speed relay 16, and controls the stroke of the speed relay 16, i.e., the output of the mechanical hydraulic control device 10.

[0036] The starting device 18 is provided with a starting device opening detector 21. The starting device opening detector 21 measures the opening (stroke) of the starting device 18. The starting device opening detector 21 is connected to a recording unit 31 of a monitoring device 30 described below. The starting device opening detector 21 outputs the measurement value of the opening of the starting device 18 to the recording unit 31 of the monitoring device 30.

[0037] The synchronizer 19 is connected to the rotary pilot valve sleeve 13. The synchronizer 19 controls the rotary pilot valve sleeve 13. The synchronizer 19 controls the rotary pilot valve sleeve 13 to move it up and down, thereby changing the oil passage area of ​​the inlet and outlet of the control oil of the rotary pilot valve sleeve 13. In this way, the synchronizer 19 controls the amount of control oil supplied to the speed relay 16, and controls the stroke of the speed relay 16, i.e., the output of the mechanical hydraulic control device 10.

[0038] The synchronizer 19 is provided with a synchronizer opening detector 22. The synchronizer opening detector 22 measures the opening (stroke) of the synchronizer 19. The synchronizer opening detector 22 is connected to a recording unit 31 of a monitoring device 30 described below. The synchronizer opening detector 22 outputs a measurement value of the opening of the synchronizer 19 to the recording unit 31 of the monitoring device 30.

[0039] Next, a monitoring device 30 according to this embodiment will be described. The monitoring device 30 is a device that monitors the mechanical hydraulic control device 10. In this embodiment, the monitoring device 30 monitors the opening degree of the regulator valve 2 and the opening degree of the starting device 18, and determines the signs of failure and the causes of failure of the mechanical hydraulic control device 10.

[0040] The monitoring device 30 includes a recording unit 31, a setting unit 32, an alarm unit 33, a display unit 34, and an operation unit 35.

[0041] The recording unit 31 records the measured value of the opening of the regulator valve 2 and the measured value of the opening of the starting device 18 in association with each other. The recording unit 31 records the measured value of the opening of the regulator valve 2 and the measured value of the opening of the starting device 18 as time-series data so that the measured values ​​are associated with each other. The measured value of the opening of the regulator valve 2 is obtained from the regulator valve opening detector 7. The measured value of the opening of the starting device 18 is obtained from the starting device opening detector 21.

[0042] In the setting unit 32, a reference value of the opening of the regulating valve 2 and a reference value of the opening of the starting device 18 are set in association with each other. In the setting unit 32, the reference value of the opening of the regulating valve 2 and the reference value of the opening of the starting device 18, which are associated with each other, are set as time-series data. In addition, in the setting unit 32, a setting value for determining the relationship between the measured value of the opening of the starting device 18 and the reference value of the opening of the starting device 18 is set.

[0043] The warning unit 33 outputs a warning for the mechanical hydraulic control device 10 based on the measured value of the opening of the starting device 18, a reference value of the opening of the starting device 18, and a set value for determining the relationship between the measured value of the opening of the starting device 18 and the reference value of the opening of the starting device 18. The measured value of the opening of the starting device 18 is obtained from the recording unit 31. The reference value of the opening of the starting device 18 is obtained from the setting unit 32. The above set values ​​are obtained from the setting unit 32. Examples of the warning include a warning indication on a display, a warning output by a light of a lamp, a warning output by a buzzer sound, etc.

[0044] The display unit 34 determines and displays the cause of a failure of the mechanical hydraulic control device 10 based on the measured value of the opening of the starting device 18, the reference value of the opening of the starting device 18, and the above-mentioned set values. The measured value of the opening of the starting device 18 is obtained from the recording unit 31. The reference value of the opening of the starting device 18 is obtained from the setting unit 32. The above-mentioned set values ​​are obtained from the setting unit 32. Examples of display include displaying the name and number of the faulty device on the screen, displaying an image of the faulty location, etc.

[0045] The operation unit 35 operates the starting device 18 and the synchronizing device 19. That is, the starting device 18 and the synchronizing device 19 operate in response to commands from the operation unit 35.

[0046] Next, the monitoring of the mechanical hydraulic control device 10 according to this embodiment will be described in detail with reference to Figs.

[0047] 2 to 4 are graphs for explaining the monitoring of the mechanical hydraulic control device according to the present embodiment. In Fig. 2 to Fig. 4, the horizontal axis represents the opening degree of the starting device 18 (starting device opening degree), and the vertical axis represents the opening degree of the regulating valve 2 (regulating valve opening degree).

[0048] In Fig. 2, curve L1 shows the relationship between the opening of regulating valve 2 and the opening of starting device 18 in the normal state. As shown by curve L1 in Fig. 2, when the opening of starting device 18 is increased from the fully closed state, regulating valve 2 starts to open at starting device opening X1, and then, as the starting device opening increases, the regulating valve opening increases, and regulating valve 2 is fully open at starting device opening X1'. This curve L1 corresponds to the reference value of the opening of regulating valve 2 and the reference value of the opening of starting device 18, which are associated with each other, and is set in setting unit 32.

[0049] When the regulating valve 2 is operated using the starting device 18 in a malfunction-free mechanical hydraulic control device 10, a measurement value of the opening of the regulating valve 2 that generally corresponds to the measurement value of the opening of the starting device 18 as shown in curve L1 is measured and recorded in the recording unit 31. During this measurement, the synchronizer 19 is not operated, and the rotary pilot valve sleeve 13 is not controlled by the synchronizer 19.

[0050] On the other hand, if the measured value of the opening of the regulating valve 2 corresponding to the measured value of the opening of the starting device 18 deviates from this curve L1, it is considered that there is a sign of a failure of the mechanical hydraulic control device 10.

[0051] According to the study by the present inventors, it has been found that the opening degree of the regulator valve 2 changes in various ways depending on the cause of a failure of the mechanical hydraulic control device 10. In the present embodiment, the measured value of the opening degree of the regulator valve 2 and the measured value of the opening degree of the starting device 18 are used to determine the signs of failure and the cause of the failure of the mechanical hydraulic control device 10.

[0052] In FIG. 3, curve L2 shows an example of the measured value of the opening of the regulating valve 2 corresponding to the measured value of the opening of the starting device 18 for a mechanical hydraulic control device 10 that is experiencing a malfunction.

[0053] If there is increased rattle or wear in the mechanical lever connection that connects any part from the starting device 18 to the regulator valve 2, a dead zone for the increased rattle or wear will occur when the starting device 18 is operated. For this reason, the starting device opening degree X2 at which the regulator valve 2 begins to open will be delayed relative to the starting device opening degree X1, and the starting device opening degree X2' at which the regulator valve 2 is fully open will also be delayed relative to the starting device opening degree X1'.

[0054] Therefore, in this embodiment, the delay in the timing when the regulating valve 2 starts to open (X2-X1) and the delay in the timing when the regulating valve 2 is fully open (X2'-X1') are compared with K1 (X1'-X1). Here, K1 is a set value for determining the relationship between the measured value of the opening degree of the starting device 18 and the reference value of the opening degree of the starting device 18.

[0055] The set value K1 is, for example, a real number that satisfies the inequality 0≦K1≦1. The set value K1 corresponds to the detection sensitivity when detecting a change in the measurement value. The setting unit 32 may be configured so that the operator can change the set value K1. This allows the operator to adjust the detection sensitivity.

[0056] The malfunction symptom of the mechanical hydraulic control device 10 is determined based on whether or not the inequalities (X2-X1)>K1(X1'-X1) and (X2'-X1')>K1(X1'-X1) are satisfied. If both (X2-X1) and (X2'-X1') are greater than K1(X1'-X1), it is determined that there is a malfunction symptom of the mechanical hydraulic control device 10, and an alarm for the mechanical hydraulic control device 10 is output by the alarm unit 33.

[0057] In this case, the cause of the failure of the mechanical hydraulic control device 10 is determined to be increased rattle or wear in the mechanical lever connection that connects any part from the starting device 18 to the regulating valve 2, and the determination result is displayed on the display unit 34.

[0058] In FIG. 4, curve L3 shows another example of the measured value of the opening of the regulating valve 2 corresponding to the measured value of the opening of the starting device 18 for a mechanical hydraulic control device 10 that is predicting a failure.

[0059] The speed relay 16 may experience wear at the rod penetration due to changes in the stroke during operation, and control oil may leak from this worn part. As described above, the speed relay 16 has a spring inside, and the control oil is supplied to the lower part of the piston against the spring force, causing the stroke to change. When the control oil supplied from the auxiliary pilot valve 15 through the rotary pilot valve sleeve 13 leaks from the speed relay 16, the spring force of the speed relay 16 increases in the high opening range of the starting device 18. Therefore, the required stroke amount for the auxiliary pilot valve 15 increases in the high opening range of the starting device 18, and the starting device opening X2' at which the flow control valve 2 fully opens is delayed compared to the starting device opening X1'. In this case, the starting device opening X2 at which the flow control valve 2 in the low opening range of the starting device 18 begins to open does not change significantly with respect to the starting device opening X1.

[0060] Therefore, in the present embodiment, the delay (X2 - X1) in the timing when the flow control valve 2 starts to open and the delay (X2' - X1') in the timing when the flow control valve 2 fully opens are compared with K2(X1' - X1). Here, K2 is a set value for determining the relationship between the measured value of the opening of the starting device 18 and the reference value of the opening of the starting device 18.

[0061] The set value K2 is, for example, a real number that satisfies the inequality 0 ≦ K2 ≦ 1. The set value K2 corresponds to the detection sensitivity when detecting changes in the measured value. The setting unit 32 may be configured such that the operator can change the set value K2. Thereby, adjustment of the detection sensitivity by the operator becomes possible.

[0062] In this case, the sign of failure of the mechanical hydraulic control device 10 is determined by whether or not the inequalities (X2 - X1) < K2(X1' - X1) and (X2' - X1') > K2(X1' - X1) are satisfied. When (X2 - X1) is smaller than K2(X1' - X1) and (X2' - X1') is larger than K2(X1' - X1), it is determined that there is a sign of failure of the mechanical hydraulic control device 10, and an alarm about the mechanical hydraulic control device 10 is output by the alarm unit 33.

[0063] In this case, the cause of the failure of the mechanical hydraulic control device 10 is determined to be leakage of control oil from the speed relay 16, and the result of the determination is displayed on the display unit .

[0064] As described above, according to this embodiment, an alarm for the mechanical hydraulic control device 10 is output by the alarm unit 33 based on the measured value of the opening of the starting device 18, the reference value of the opening of the starting device 18, and the set values ​​K1 and K2. This makes it possible to determine a failure symptom of the mechanical hydraulic control device 10 before a failure of the mechanical hydraulic control device 10 actually occurs, and allows the operator to know the failure symptom of the mechanical hydraulic control device 10. This makes it possible to prevent unplanned shutdowns of the power plant, and to shorten the shutdown period of the power plant by making preparations before the shutdown of the power plant.

[0065] Furthermore, according to this embodiment, the cause of a failure of the mechanical hydraulic control device 10 is determined based on the measured value of the opening of the starting device 18, the reference value of the opening of the starting device 18, and the set values ​​K1 and K2, and is displayed on the display unit 34. This makes it possible to determine the cause of a failure of the mechanical hydraulic control device 10 before a failure of the mechanical hydraulic control device 10 actually occurs, and allows the operator to know the cause of the failure of the mechanical hydraulic control device 10. This makes it possible to make appropriate preparations for a solution to the cause of the failure before the power plant is shut down, and shortens the shutdown period of the power plant.

[0066] (Second embodiment) Next, a mechanical hydraulic control device monitoring device, a control system, and a mechanical hydraulic control device monitoring method according to a second embodiment will be described with reference to Figs.

[0067] The second embodiment shown in Figures 5 to 7 differs mainly in that the warning unit outputs a warning for the mechanical hydraulic control device based on a measured value of the opening of the synchronizer, a reference value of the opening of the synchronizer, and a set value for determining the relationship between the measured value of the opening of the synchronizer and the reference value of the opening of the synchronizer. The other configurations are substantially the same as those of the first embodiment shown in Figures 1 to 4. In the second embodiment, a repeated description of the same parts as those of the first embodiment will be omitted.

[0068] In this embodiment, the monitoring device 30 monitors the opening degree of the regulator valve 2 and the opening degree of the synchronizer 19, and judges the signs of failure and the causes of failure of the mechanical hydraulic control device 10.

[0069] In this embodiment, the recording unit 31 records the measurement value of the opening of the regulating valve 2 and the measurement value of the opening of the synchronizer 19 in association with each other. The recording unit 31 records the measurement value of the opening of the regulating valve 2 and the measurement value of the opening of the synchronizer 19 as time-series data so that they are associated with each other. The measurement value of the opening of the regulating valve 2 is obtained from the regulating valve opening detector 7. The measurement value of the opening of the synchronizer 19 is obtained from the synchronizer opening detector 22.

[0070] In this embodiment, the reference value of the opening of the regulating valve 2 and the reference value of the opening of the synchronizer 19 are set in association with each other in the setting unit 32. The reference value of the opening of the regulating valve 2 and the reference value of the opening of the synchronizer 19, which are associated with each other, are set as time-series data in the setting unit 32. Also, the setting unit 32 has set values ​​for determining the relationship between the measured value of the opening of the synchronizer 19 and the reference value of the opening of the synchronizer 19.

[0071] In this embodiment, the warning unit 33 outputs a warning for the mechanical hydraulic control device 10 based on the measured value of the opening of the synchronizer 19, the reference value of the opening of the synchronizer 19, and a set value for determining the relationship between the measured value of the opening of the synchronizer 19 and the reference value of the opening of the synchronizer 19. The measured value of the opening of the synchronizer 19 is obtained from the recording unit 31. The reference value of the opening of the synchronizer 19 is obtained from the setting unit 32. The above set values ​​are obtained from the setting unit 32.

[0072] In this embodiment, the display unit 34 determines and displays the cause of a failure of the mechanical hydraulic control device 10 based on the measured value of the opening of the synchronizer 19, the reference value of the opening of the synchronizer 19, and the above-mentioned set values. The measured value of the opening of the synchronizer 19 is obtained from the recording unit 31. The reference value of the opening of the synchronizer 19 is obtained from the setting unit 32. The above-mentioned set values ​​are obtained from the setting unit 32.

[0073] Next, the monitoring of the mechanical hydraulic control device 10 according to this embodiment will be described in detail with reference to Figs.

[0074] 5 to 7 are graphs for explaining the monitoring of the mechanical hydraulic control device according to this embodiment. In Fig. 5 to Fig. 7, the horizontal axis represents the opening degree of the synchronizer 19 (synchronizer opening degree), and the vertical axis represents the opening degree of the regulating valve 2 (regulating valve opening degree).

[0075] In Fig. 5, curve M1 shows the relationship between the opening of the regulating valve 2 and the opening of the synchronizer 19 in the normal state. As shown by curve M1 in Fig. 5, when the opening of the synchronizer 19 is increased from the fully closed state, the regulating valve 2 starts to open at synchronizer opening Y1, and then the regulating valve opening increases as the synchronizer opening increases, and the regulating valve opening reaches its upper limit at synchronizer opening Y1'. This curve M1 corresponds to the reference value of the opening of the regulating valve 2 and the reference value of the opening of the synchronizer 19, which are associated with each other, and is set in setting unit 32.

[0076] When the regulating valve 2 is operated using the synchronizer 19 for a malfunction-free mechanical hydraulic control device 10, a measurement value of the opening of the regulating valve 2 that generally corresponds to the measurement value of the opening of the synchronizer 19 as shown in curve M1 is measured and recorded in the recording unit 31. During this measurement, the starting device 18 is not operated, and the auxiliary pilot valve 15 is not controlled by the starting device 18.

[0077] On the other hand, if the measured value of the opening of the regulating valve 2 corresponding to the measured value of the opening of the synchronizer 19 deviates from this curve M1, it is considered that there is a sign of a failure of the mechanical hydraulic control device 10.

[0078] According to the study by the present inventors, it has been found that the opening degree of the regulator valve 2 changes in various ways depending on the cause of a failure of the mechanical hydraulic control device 10. In the present embodiment, the measured value of the opening degree of the regulator valve 2 and the measured value of the opening degree of the synchronizer 19 are used to determine the signs of failure and the cause of the failure of the mechanical hydraulic control device 10.

[0079] In FIG. 6, a curve M2 shows an example of the measured value of the opening of the regulating valve 2 corresponding to the measured value of the opening of the synchronizer 19 for a mechanical hydraulic control device 10 which is experiencing a malfunction.

[0080] If rattle or wear increases in the mechanical lever connection that connects any part from the synchronizer 19 to the regulator valve 2, a dead zone for the increased rattle or wear occurs when the synchronizer 19 is operated. For this reason, the synchronizer opening degree Y2 at which the regulator valve 2 starts to open lags behind the synchronizer opening degree Y1, and the synchronizer opening degree Y2' at which the regulator valve opening reaches its upper limit also lags behind the synchronizer opening degree Y1'.

[0081] Therefore, in this embodiment, the delay in timing when the regulator valve 2 starts to open (Y2-Y1) and the delay in timing when the regulator valve opening degree reaches the upper limit (Y2'-Y1') are compared with K3 (Y1'-Y1). Here, K3 is a set value for determining the relationship between the measured value of the opening degree of the synchronizer 19 and the reference value of the opening degree of the synchronizer 19.

[0082] The set value K3 is, for example, a real number that satisfies the inequality 0≦K3≦1. The set value K3 corresponds to the detection sensitivity when detecting a change in the measurement value. The setting unit 32 may be configured so that the operator can change the set value K3. This allows the operator to adjust the detection sensitivity.

[0083] The malfunction symptom of the mechanical hydraulic control device 10 is determined based on whether or not the inequalities (Y2-Y1)>K3(Y1'-Y1) and (Y2'-Y1')>K3(Y1'-Y1) are satisfied. If both (Y2-Y1) and (Y2'-Y1') are greater than K3(Y1'-Y1), it is determined that there is a malfunction symptom of the mechanical hydraulic control device 10, and an alarm for the mechanical hydraulic control device 10 is output by the alarm unit 33.

[0084] In this case, the cause of the failure of the mechanical hydraulic control device 10 is determined to be increased rattle or wear in the mechanical lever connection that connects any part from the synchronization device 19 to the regulating valve 2, and the determination result is displayed on the display unit 34.

[0085] In FIG. 7, a curve M3 indicates another example of the measured value of the opening of the regulating valve 2 corresponding to the measured value of the opening of the synchronizer 19 for a mechanical hydraulic control device 10 that is predicting a failure.

[0086] The speed relay 16 may wear at the rod penetration part due to stroke changes during operation, and control oil may leak from this worn part. As described above, the speed relay 16 has a spring inside, and the stroke changes when control oil is supplied to the bottom of the piston against the spring force. If the control oil supplied from the rotary pilot valve sleeve 13 leaks from the speed relay 16, the spring force of the speed relay 16 becomes high in the high opening range of the synchronizer 19. Therefore, the stroke amount required of the rotary pilot valve sleeve 13 increases in the high opening range of the synchronizer 19, and the synchronizer opening Y2' at which the regulating valve opening reaches the upper limit is delayed compared to the synchronizer opening Y1'. In this case, the synchronizer opening Y2 at which the regulating valve 2 in the low opening range of the synchronizer 19 starts to operate does not change significantly with respect to the synchronizer opening Y1.

[0087] Therefore, in the present embodiment, the delay (Y2 - Y1) in the timing when the control valve 2 starts the opening operation and the delay (Y2' - Y1') in the timing when the control valve opening reaches the upper limit are compared with K4(Y1' - Y1). Here, K4 is a set value for determining the relationship between the measured value of the opening of the synchronizer 19 and the reference value of the opening of the synchronizer 19.

[0088] The set value K4 is, for example, a real number that satisfies the inequality 0 ≤ K4 ≤ 1. The set value K4 corresponds to the detection sensitivity when detecting changes in the measured value. The setting unit 32 may be configured such that the operator can change the set value K4. Thereby, the operator can adjust the detection sensitivity.

[0089] In this case, the indication of a fault in the mechanical hydraulic control device 10 is determined by whether the inequalities (Y2 - Y1) < K4(Y1' - Y1) and (Y2' - Y1') > K4(Y1' - Y1) are satisfied. If (Y2 - Y1) is smaller than K4(Y1' - Y1) and (Y2' - Y1') is larger than K4(Y1' - Y1), it is determined that there is an indication of a fault in the mechanical hydraulic control device 10, and an alarm about the mechanical hydraulic control device 10 is output by the alarm unit 33.

[0090] Also, in this case, the cause of the fault in the mechanical hydraulic control device 10 is determined to be a leakage of the control oil from the speed relay 16, and the determination result is displayed by the display unit 34.

[0091] As described above, according to the present embodiment, based on the measured value of the opening of the synchronizer 19, the reference value of the opening of the synchronizer 19, and the set values K3 and K4, an alarm about the mechanical hydraulic control device 10 is output by the alarm unit 33. Thus, before a fault in the mechanical hydraulic control device 10 actually occurs, the indication of a fault in the mechanical hydraulic control device 10 can be determined, and the operator can know the indication of a fault in the mechanical hydraulic control device 10. Therefore, it is possible to prevent an unplanned stop of the power generation plant or to shorten the stop period of the power generation plant by making preparations before the power generation plant stops.

[0092] Furthermore, according to this embodiment, the cause of a failure of the mechanical hydraulic control device 10 is determined based on the measured value of the opening of the synchronizer 19, the reference value of the opening of the synchronizer 19, and the set values ​​K3 and K4, and is displayed by the display unit 34. This makes it possible to determine the cause of a failure of the mechanical hydraulic control device 10 before a failure of the mechanical hydraulic control device 10 actually occurs, and allows the operator to know the cause of the failure of the mechanical hydraulic control device 10. This makes it possible to make appropriate preparations for a solution to the cause of the failure before the power plant is shut down, and shortens the shutdown period of the power plant.

[0093] (Third embodiment) Next, a mechanical hydraulic control device monitoring device, a control system, and a mechanical hydraulic control device monitoring method according to a third embodiment will be described with reference to Figs.

[0094] The third embodiment shown in Figures 8 and 9 is different mainly in that the warning unit outputs a warning for the mechanical hydraulic control device based on a measurement value of the opening of the control oil supply valve, a reference value of the opening of the control oil supply valve, and a set value for determining the relationship between the measurement value of the opening of the control oil supply valve and the reference value of the opening of the control oil supply valve. The other configurations are substantially the same as those of the first embodiment shown in Figures 1 to 4. In the third embodiment, a repeated description of the same parts as those of the first embodiment will be omitted.

[0095] In this embodiment, the monitoring device 30 monitors the opening degree of the auxiliary pilot valve 15 (control oil supply valve) and the opening degree of the starting device 18, and judges the signs of failure and the causes of failure of the machine hydraulic control device 10.

[0096] In this embodiment, the recording unit 31 records the measured value of the opening of the auxiliary pilot valve 15 and the measured value of the opening of the starting device 18 in association with each other. The recording unit 31 records the measured value of the opening of the auxiliary pilot valve 15 and the measured value of the opening of the starting device 18 as time-series data so as to associate them with each other. The measured value of the opening of the auxiliary pilot valve 15 is obtained from the auxiliary pilot valve opening detector 20. The measured value of the opening of the starting device 18 is obtained from the starting device opening detector 21.

[0097] In this embodiment, the reference value of the opening of the auxiliary pilot valve 15 and the reference value of the opening of the starting device 18 are set in association with each other in the setting unit 32. The reference value of the opening of the auxiliary pilot valve 15 and the reference value of the opening of the starting device 18, which are associated with each other, are set in the setting unit 32 as time-series data. Also, the setting unit 32 sets a setting value for determining the relationship between the measured value of the opening of the auxiliary pilot valve 15 and the reference value of the opening of the auxiliary pilot valve 15.

[0098] In this embodiment, the warning unit 33 outputs a warning for the machine hydraulic control device 10 based on the measured value of the opening of the auxiliary pilot valve 15, the reference value of the opening of the auxiliary pilot valve 15, and a set value for determining the relationship between the measured value of the opening of the auxiliary pilot valve 15 and the reference value of the opening of the auxiliary pilot valve 15. The measured value of the opening of the auxiliary pilot valve 15 is obtained from the recording unit 31. The reference value of the opening of the auxiliary pilot valve 15 is obtained from the setting unit 32. The above set values ​​are obtained from the setting unit 32.

[0099] In this embodiment, the display unit 34 determines and displays the cause of a failure of the machine hydraulic control device 10 based on the measured value of the opening of the auxiliary pilot valve 15, the reference value of the opening of the auxiliary pilot valve 15, and the above-mentioned set values. The measured value of the opening of the auxiliary pilot valve 15 is obtained from the recording unit 31. The reference value of the opening of the auxiliary pilot valve 15 is obtained from the setting unit 32. The above-mentioned set values ​​are obtained from the setting unit 32.

[0100] Next, the monitoring of the mechanical hydraulic control device 10 according to this embodiment will be described in detail with reference to FIG. 8 and FIG.

[0101] 8 and 9 are graphs for explaining the monitoring of the mechanical hydraulic control device according to this embodiment. In Fig. 8 and Fig. 9, the horizontal axis indicates the opening degree of the starting device 18 (starting device opening degree), and the vertical axis indicates the opening degree of the auxiliary pilot valve 15 (auxiliary pilot valve opening degree).

[0102] In FIG. 8, curve N1 shows the relationship between the opening degree of the auxiliary pilot valve 15 and the opening degree of the starting device 18 in a normal state. As shown in the curve N1 of FIG. 8, when the opening degree of the starting device 18 is increased from a fully closed state, the auxiliary pilot valve 15 starts to open at the starting device opening degree Z1, and then the auxiliary pilot valve opening degree increases with the increase in the starting device opening degree, and the regulating valve 2 starts to open at the starting device opening degree X1. After that, the auxiliary pilot valve opening degree indicates a constant auxiliary pilot valve opening degree H1, and the regulating valve 2 becomes fully open at the starting device opening degree X1'. After that, the auxiliary pilot valve opening degree increases with the increase in the starting device opening degree, and the auxiliary pilot valve 15 becomes fully open at the starting device opening degree Z1'. This curve N1 corresponds to the reference value of the opening degree of the auxiliary pilot valve 15 and the reference value of the opening degree of the starting device 18, which are associated with each other, and are set in the setting unit 32.

[0103] When the auxiliary pilot valve 15 is operated using the starting device 18 in a malfunction-free mechanical hydraulic control device 10, a measurement value of the opening of the auxiliary pilot valve 15 that generally corresponds to the measurement value of the opening of the starting device 18 as shown in curve N1 is measured and recorded in the recording unit 31. During this measurement, the synchronizer 19 is not operated, and the rotary pilot valve sleeve 13 is not controlled by the synchronizer 19.

[0104] On the other hand, if the measured value of the opening of the auxiliary pilot valve 15 corresponding to the measured value of the opening of the starting device 18 deviates from this curve N1, it is considered that there is a sign of a failure of the mechanical hydraulic control device 10.

[0105] According to the study by the present inventors, it has been found that the opening degree of the auxiliary pilot valve 15 changes in various ways depending on the cause of a failure of the mechanical hydraulic control device 10. In this embodiment, the measured value of the opening degree of the auxiliary pilot valve 15 and the measured value of the opening degree of the starting device 18 are used to determine the signs of failure and the cause of the failure of the mechanical hydraulic control device 10.

[0106] In FIG. 9, a curve N2 shows an example of the measured value of the opening degree of the auxiliary pilot valve 15 corresponding to the measured value of the opening degree of the starting device 18 for a mechanical hydraulic control device 10 which is experiencing a malfunction.

[0107] If the control oil supplied from auxiliary pilot valve 15 to speed relay 16 leaks, if wear at the connection between speed regulating unit 12 and rotary pilot valve 14 increases, or if a malfunction occurs in the spring of speed regulating unit 12, an increased amount of control oil will be required to operate speed relay 16. For this reason, during the period from starter opening degree X1 at which regulating valve 2 begins to open to starter opening degree X1 at which regulating valve 2 is fully open, auxiliary pilot valve opening degree H2 becomes larger than auxiliary pilot valve opening degree H1.

[0108] Examples of control oil leakage here include leakage of control oil from the rod penetration part of the speed relay 16, leakage of control oil due to damage to the oil piping from the auxiliary pilot valve 15 to the speed relay 16, leakage of control oil due to a loose connection of the oil piping, etc. Furthermore, an example of a malfunction of the spring of the speed governing rotation part 12 is deformation over time of the spring provided in the speed governing rotation part, etc.

[0109] Therefore, in this embodiment, the amount of change (H2-H1) in the opening of the auxiliary pilot valve 15 is compared with K5·H1, where K5 is a set value for determining the relationship between the measured value of the opening of the auxiliary pilot valve 15 and the reference value of the opening of the auxiliary pilot valve 15.

[0110] The set value K5 is, for example, a real number that satisfies the inequality 0≦K5≦1. The set value K5 corresponds to the detection sensitivity when detecting a change in the measurement value. The setting unit 32 may be configured so that the operator can change the set value K5. This allows the operator to adjust the detection sensitivity.

[0111] The malfunction symptom of the mechanical hydraulic control device 10 is determined based on whether or not the inequality (H2-H1)>K5·H1 is satisfied. If (H2-H1) is greater than K5·H1, it is determined that there is a malfunction symptom of the mechanical hydraulic control device 10, and an alarm for the mechanical hydraulic control device 10 is output by the alarm unit 33.

[0112] In this case, the cause of the failure of the mechanical hydraulic control device 10 is determined to be leakage of the control oil supplied to the speed relay 16, increased wear at the connection between the speed regulating unit 12 and the rotary pilot valve 14, or a malfunction of the spring in the speed regulating unit 12, and the determination result is displayed on the display unit 34.

[0113] As described above, according to this embodiment, an alarm for the mechanical hydraulic control device 10 is output by the alarm unit 33 based on the measurement value of the opening of the auxiliary pilot valve 15, the reference value of the opening of the auxiliary pilot valve 15, and the set value K5. This makes it possible to determine a failure symptom of the mechanical hydraulic control device 10 before a failure of the mechanical hydraulic control device 10 actually occurs, and allows the operator to know the failure symptom of the mechanical hydraulic control device 10. This makes it possible to prevent unplanned shutdowns of the power plant, and to shorten the shutdown period of the power plant by making preparations before the shutdown of the power plant.

[0114] Furthermore, according to this embodiment, the cause of a failure of the mechanical hydraulic control device 10 is determined based on the measured value of the opening of the auxiliary pilot valve 15, the reference value of the opening of the auxiliary pilot valve 15, and the set value K5, and is displayed by the display unit 34. This makes it possible to determine the cause of a failure of the mechanical hydraulic control device 10 before a failure of the mechanical hydraulic control device 10 actually occurs, and allows the operator to know the cause of the failure of the mechanical hydraulic control device 10. This makes it possible to make appropriate preparations for a solution to the cause of the failure before the power plant is shut down, and shortens the shutdown period of the power plant.

[0115] (Fourth embodiment) Next, a mechanical hydraulic control device monitoring device, a control system, and a mechanical hydraulic control device monitoring method according to a fourth embodiment will be described with reference to FIG.

[0116] In the fourth embodiment shown in FIG. 10, the display unit mainly differs in that it judges and displays the cause of failure of the mechanical hydraulic control device based on the measured value of the opening of the starting device, the reference value of the opening of the starting device, a set value for judging the relationship between the measured value of the opening of the starting device and the reference value of the opening of the starting device, the measured value of the opening of the synchronizing device, the reference value of the opening of the synchronizing device, a set value for judging the relationship between the measured value of the opening of the synchronizing device and the reference value of the opening of the synchronizing device, the measured value of the opening of the control oil supply valve, the reference value of the opening of the control oil supply valve, and a set value for judging the relationship between the measured value of the opening of the control oil supply valve and the reference value of the opening of the control oil supply valve. The other configurations are substantially the same as those of the first to third embodiments shown in FIG. 1 to FIG. 9. In the fourth embodiment, the same parts as those of the first to third embodiments will not be described again.

[0117] In this embodiment, the cause of a failure in the mechanical hydraulic control device 10 is determined by combining the monitoring of the mechanical hydraulic control device 10 according to the above-mentioned first to third embodiments.

[0118] In this embodiment, the recording unit 31 records the measured value of the opening of the regulator valve 2 and the measured value of the opening of the starting device 18 in association with each other. The recording unit 31 records the measured value of the opening of the regulator valve 2 and the measured value of the opening of the starting device 18 as time-series data so that the measured values ​​are associated with each other. The measured value of the opening of the regulator valve 2 is obtained from the regulator valve opening detector 7. The measured value of the opening of the starting device 18 is obtained from the starting device opening detector 21.

[0119] In this embodiment, the recording unit 31 records the measurement value of the opening of the regulating valve 2 and the measurement value of the opening of the synchronizer 19 in association with each other. The recording unit 31 records the measurement value of the opening of the regulating valve 2 and the measurement value of the opening of the synchronizer 19 as time-series data so that they are associated with each other. The measurement value of the opening of the regulating valve 2 is obtained from the regulating valve opening detector 7. The measurement value of the opening of the synchronizer 19 is obtained from the synchronizer opening detector 22.

[0120] In this embodiment, the recording unit 31 records the measured value of the opening of the auxiliary pilot valve 15 and the measured value of the opening of the starting device 18 in association with each other. The recording unit 31 records the measured value of the opening of the auxiliary pilot valve 15 and the measured value of the opening of the starting device 18 as time-series data so as to associate them with each other. The measured value of the opening of the auxiliary pilot valve 15 is obtained from the auxiliary pilot valve opening detector 20. The measured value of the opening of the starting device 18 is obtained from the starting device opening detector 21.

[0121] In this embodiment, the reference value of the opening of the regulating valve 2 and the reference value of the opening of the starting device 18 are set in association with each other in the setting unit 32. The reference value of the opening of the regulating valve 2 and the reference value of the opening of the starting device 18, which are associated with each other, are set in the setting unit 32 as time-series data. Also, the setting unit 32 has set values ​​for determining the relationship between the measured value of the opening of the starting device 18 and the reference value of the opening of the starting device 18.

[0122] In this embodiment, the reference value of the opening of the regulating valve 2 and the reference value of the opening of the synchronizer 19 are set in association with each other in the setting unit 32. The reference value of the opening of the regulating valve 2 and the reference value of the opening of the synchronizer 19, which are associated with each other, are set as time-series data in the setting unit 32. Also, the setting unit 32 has set values ​​for determining the relationship between the measured value of the opening of the synchronizer 19 and the reference value of the opening of the synchronizer 19.

[0123] In this embodiment, the reference value of the opening of the auxiliary pilot valve 15 and the reference value of the opening of the starting device 18 are set in association with each other in the setting unit 32. The reference value of the opening of the auxiliary pilot valve 15 and the reference value of the opening of the starting device 18, which are associated with each other, are set in the setting unit 32 as time-series data. Also, the setting unit 32 sets a setting value for determining the relationship between the measured value of the opening of the auxiliary pilot valve 15 and the reference value of the opening of the auxiliary pilot valve 15.

[0124] In this embodiment, the display unit 34 judges and displays the cause of a failure of the mechanical hydraulic control device 10 based on the measured value of the opening of the starting device 18, the reference value of the opening of the starting device 18, a set value for judging the relationship between the measured value of the opening of the starting device 18 and the reference value of the opening of the starting device 18, the measured value of the opening of the synchronizer 19, the reference value of the opening of the synchronizer 19, a set value for judging the relationship between the measured value of the opening of the synchronizer 19 and the reference value of the opening of the synchronizer 19, the measured value of the opening of the auxiliary pilot valve 15, the reference value of the opening of the auxiliary pilot valve 15, and a set value for judging the relationship between the measured value of the opening of the auxiliary pilot valve 15 and the reference value of the opening of the auxiliary pilot valve 15. The measured value of the opening of the starting device 18 is obtained from the recording unit 31. The reference value of the opening of the starting device 18 is obtained from the setting unit 32. The measured value of the opening of the synchronizer 19 is obtained from the recording unit 31. The reference value of the opening of the synchronizer 19 is obtained from the setting unit 32. The measured value of the opening of the auxiliary pilot valve 15 is obtained from the recording unit 31. The reference value of the opening of the auxiliary pilot valve 15 is obtained from the setting unit 32. Each of the above set values ​​is obtained from the setting unit 32.

[0125] Next, the monitoring of the mechanical hydraulic control device 10 according to this embodiment will be described in detail with reference to FIG.

[0126] FIG. 10 is a flowchart showing an example of a method for determining the cause of a failure of the mechanical hydraulic control device 10 according to this embodiment.

[0127] First, in step S1, the opening degree of regulating valve 2 (regulating valve opening degree) and the opening degree of starting device 18 (starting device opening degree) are measured. More specifically, auxiliary pilot valve 15 is controlled by starting device 18 to increase the opening degree of starting device 18 from a fully closed state until regulating valve 2 is fully open. At that time, the opening degree of starting device 18 is measured by starting device opening detector 21, and the opening degree of regulating valve 2 is measured by regulating valve opening detector 7.

[0128] Subsequently, in step S2, the measured value of the opening degree of the pressure reducing valve 2 and the measured value of the opening degree of the starting device 18 are associated with each other and recorded in the recording unit 31. More specifically, they are recorded as time-series data so as to be associated with each other. The measured value of the opening degree of the pressure reducing valve 2 is obtained from the pressure reducing valve opening degree detector 7. The measured value of the opening degree of the starting device 18 is obtained from the starting device opening degree detector 21.

[0129] Next, in step S3, a sign of failure of the mechanical hydraulic control device 10 is determined. More specifically, first, the measured value of the opening degree of the starting device 18 is obtained from the recording unit 31 in which the measured value of the opening degree of the pressure reducing valve 2 and the measured value of the opening degree of the starting device 18 are recorded in association with each other. Also, the reference value of the opening degree of the starting device 18 is obtained from the setting unit 32 in which the reference value of the opening degree of the pressure reducing valve 2 and the reference value of the opening degree of the starting device 18 are set in association with each other. Further, setting values K1 and K2 for determining the relationship between the measured value of the opening degree of the starting device 18 and the reference value of the opening degree of the starting device 18 are obtained from the setting unit 32.

[0130] Then, based on the measured value of the opening degree of the starting device 18, the reference value of the opening degree of the starting device 18, and the setting values K1 and K2 for determining the relationship between the measured value of the opening degree of the starting device 18 and the reference value of the opening degree of the starting device 18, a sign of failure of the mechanical hydraulic control device 10 is determined. For example, as described in the above first embodiment, when the inequalities (X2 - X1)>K1(X1’ - X1) and (X2’ - X1’)>K1(X1’ - X1) are satisfied, it is determined that there is a sign of failure. Also, when the inequalities (X2 - X1)<K2(X1’ - X1) and (X2’ - X1’)>K2(X1’ - X1) are satisfied, it is determined that there is a sign of failure.

[0131] Also, in step S4, the opening degree of the pressure reducing valve 2 (pressure reducing valve opening degree) and the opening degree of the synchronizing device 19 (synchronizing device opening degree) are measured. More specifically, the rotary pilot valve sleeve 13 is controlled by the synchronizing device 19, and the opening degree of the synchronizing device 19 is increased from the fully closed state until the pressure reducing valve opening degree reaches the upper limit. At this time, the opening degree of the synchronizing device 19 is measured by the synchronizing device opening degree detector 22, and the opening degree of the pressure reducing valve 2 is measured by the pressure reducing valve opening degree detector 7.

[0132] Subsequently, in step S5, the measured value of the opening degree of the flow control valve 2 and the measured value of the opening degree of the synchronizer 19 are associated and recorded in the recording unit 31. More specifically, the measured value of the opening degree of the flow control valve 2 and the measured value of the opening degree of the synchronizer 19 are recorded as time-series data so as to be associated with each other. The measured value of the opening degree of the flow control valve 2 is obtained from the flow control valve opening degree detector 7. The measured value of the opening degree of the synchronizer 19 is obtained from the synchronizer opening degree detector 22.

[0133] Next, in step S6, a failure sign of the mechanical hydraulic control device 10 is determined. More specifically, first, the measured value of the opening degree of the synchronizer 19 is obtained from the recording unit 31 in which the measured value of the opening degree of the flow control valve 2 and the measured value of the opening degree of the synchronizer 19 are associated and recorded. Also, the reference value of the opening degree of the synchronizer 19 is obtained from the setting unit 32 in which the reference value of the opening degree of the flow control valve 2 and the reference value of the opening degree of the synchronizer 19 are associated and set. Also, the set values K3 and K4 for determining the relationship between the measured value of the opening degree of the synchronizer 19 and the reference value of the opening degree of the synchronizer 19 are obtained from the setting unit 32.

[0134] Then, based on the measured value of the opening degree of the synchronizer 19, the reference value of the opening degree of the synchronizer 19, and the set values K3 and K4 for determining the relationship between the measured value of the opening degree of the synchronizer 19 and the reference value of the opening degree of the synchronizer 19, a failure sign of the mechanical hydraulic control device 10 is determined. For example, as described in the above-described second embodiment, when the inequalities (Y2 - Y1)>K3(Y1' - Y1) and (Y2' - Y1')>K3(Y1' - Y1) are satisfied, it is determined that there is a failure sign. Also, when the inequalities (Y2 - Y1)<K4(Y1' - Y1) and (Y2' - Y1')>K4(Y1' - Y1) are satisfied, it is determined that there is a failure sign.

[0135] Furthermore, in step S7, the opening degree of auxiliary pilot valve 15 (auxiliary pilot valve opening degree) and the opening degree of starting device 18 (starting device opening degree) are measured. More specifically, auxiliary pilot valve 15 is controlled by starting device 18, and the opening degree of starting device 18 is increased from a fully closed state until auxiliary pilot valve 15 is fully open. At that time, the opening degree of starting device 18 is measured by starting device opening detector 21, and the opening degree of auxiliary pilot valve 15 is measured by auxiliary pilot valve opening detector 20.

[0136] Next, in step S8, the measured value of the opening of the auxiliary pilot valve 15 and the measured value of the opening of the starting device 18 are recorded in the recording unit 31 in association with each other. More specifically, the measured value of the opening of the auxiliary pilot valve 15 and the measured value of the opening of the starting device 18 are recorded as time-series data in association with each other. The measured value of the opening of the auxiliary pilot valve 15 is obtained from the auxiliary pilot valve opening detector 20. The measured value of the opening of the starting device 18 is obtained from the starting device opening detector 21.

[0137] Next, in step S9, a failure symptom of the mechanical hydraulic control device 10 is judged. More specifically, first, the measurement value of the opening of the auxiliary pilot valve 15 is obtained from the recording unit 31 in which the measurement value of the opening of the auxiliary pilot valve 15 and the measurement value of the opening of the starting device 18 are recorded in association with each other. In addition, the reference value of the opening of the auxiliary pilot valve 15 is obtained from the setting unit 32 in which the reference value of the opening of the auxiliary pilot valve 15 and the reference value of the opening of the starting device 18 are set in association with each other. In addition, a setting value K5 for judging the relationship between the measurement value of the opening of the auxiliary pilot valve 15 and the reference value of the opening of the auxiliary pilot valve 15 is obtained from the setting unit 32.

[0138] Then, a malfunction symptom of the mechanical hydraulic control device 10 is judged based on the measured value of the opening of the auxiliary pilot valve 15, the reference value of the opening of the auxiliary pilot valve 15, and a set value K5 for judging the relationship between the measured value of the opening of the auxiliary pilot valve 15 and the reference value of the opening of the auxiliary pilot valve 15. For example, as described in the above third embodiment, when the inequality (H2-H1)>K5·H1 is satisfied, it is judged that there is a malfunction symptom.

[0139] After that, in step S10, if it is determined that there is a sign of failure in any of steps S3, S6, and S9, the process proceeds to step S11. If it is determined that there is no sign of failure in any of steps S3, S6, and S9, this flow ends.

[0140] Subsequently, in step S11, the cause of failure of the mechanical hydraulic control device 10 is determined. For example, in step S3, if the inequalities (X2 - X1) > K1(X1’ - X1) and (X2’ - X1’) > K1(X1’ - X1) are satisfied, it is determined that the cause of failure of the mechanical hydraulic control device 10 is the looseness or increased wear in the mechanical lever connection part connecting any part from the starting device 18 to the throttle valve 2. In step S3, if the inequalities (X2 - X1) < K2(X1’ - X1) and (X2’ - X1’) > K2(X1’ - X1) are satisfied, it is determined that the cause of failure of the mechanical hydraulic control device 10 is the leakage of the control oil from the speed relay 16.

[0141] Also, for example, in step S6, if the inequalities (Y2 - Y1) > K3(Y1’ - Y1) and (Y2’ - Y1’) > K3(Y1’ - Y1) are satisfied, it is determined that the cause of failure of the mechanical hydraulic control device 10 is the looseness or increased wear in the mechanical lever connection part connecting any part from the synchronizing device 19 to the throttle valve 2. In step S6, if the inequalities (Y2 - Y1) < K4(Y1’ - Y1) and (Y2’ - Y1’) > K4(Y1’ - Y1) are satisfied, it is determined that the cause of failure of the mechanical hydraulic control device 10 is the leakage of the control oil from the speed relay 16.

[0142] Also, for example, in step S9, if the inequality (H2 - H1) > K5·H1 is satisfied, it is determined that the cause of failure of the mechanical hydraulic control device 10 is the leakage of the control oil supplied to the speed relay 16, the increased wear in the connection part between the speed governing rotating part 12 and the rotary pilot valve 14, or the defect of the spring of the speed governing rotating part 12.

[0143] Here, if it is determined that there is a failure symptom in any two or more of steps S3, S6, and S9, the failure factors of the mechanical hydraulic control device 10 are compared to determine whether there is a duplicated failure factor. If there is a duplicated failure factor, it is determined that the probability of that failure factor is high. In other words, it is determined that there is a high probability that the failure factor of the mechanical hydraulic control device 10 is the duplicated failure factor.

[0144] Next, in step S12, the determination result is displayed by the display unit 34. More specifically, if it is determined that there is a failure sign in any one of steps S3, S6, and S9, the failure factor related to the failure sign is displayed by the display unit 34. Also, if it is determined that there is a failure sign in two or more of steps S3, S6, and S9 and it is determined that there are no overlapping failure factors, the failure factors related to those failure signs are displayed by the display unit 34.

[0145] Furthermore, if it is determined that there is a failure symptom in any two or more of steps S3, S6, and S9, and that there is a duplicated failure factor, the duplicated failure factor is displayed by the display unit 34. The display unit 34 may display only the duplicated failure factor, or may display other failure factors together with the duplicated failure factor, and may highlight the duplicated failure factor. For example, the duplicated failure factor may be displayed at the top of the list, or may be highlighted in a different color.

[0146] As described above, according to this embodiment, the cause of a failure of the mechanical hydraulic control device 10 is determined based on the measured value of the opening of the starting device 18, the reference value of the opening of the starting device 18, and the set values ​​K1 and K2, the measured value of the opening of the synchronizer 19, the reference value of the opening of the synchronizer 19, and the set values ​​K3 and K4, the measured value of the opening of the auxiliary pilot valve 15, the reference value of the opening of the auxiliary pilot valve 15, and the set value K5, and is displayed by the display unit 34. This makes it possible to improve the accuracy of determining the cause of a failure of the mechanical hydraulic control device 10. Therefore, it is possible to make more appropriate preparations for a solution to the cause of the failure before the power plant is shut down, and the shutdown period of the power plant can be effectively shortened.

[0147] According to the embodiment described above, it is possible to determine the signs of failure and the causes of failure in a mechanical hydraulic control device.

[0148] Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0149] 1: control system, 2: regulator valve, 10: mechanical hydraulic control device, 13: rotary pilot valve sleeve, 15: auxiliary pilot valve, 16: speed relay, 18: starting device, 19: synchronization device, 30: monitoring device, 31: recording unit, 32: setting unit, 33: alarm unit, 34: display unit

Claims

1. A mechanical hydraulic control device monitoring device that monitors a mechanical hydraulic control device that controls a regulator valve that controls a fluid for a turbine, the mechanical hydraulic control device comprising: a hydraulic relay that operates when a control oil is supplied thereto; a control oil supply unit that supplies the control oil to the hydraulic relay; a control oil supply valve that supplies the control oil to the control oil supply unit and controls the amount of the control oil supplied to the control oil supply unit; and a start-up device that controls the control oil supply valve, a recording unit that records the measured value of the opening degree of the regulator valve and the measured value of the opening degree of the starting device in association with each other; a setting unit in which a reference value of the opening degree of the regulating valve and a reference value of the opening degree of the starting device are set in correspondence with each other; an alarm unit that outputs an alarm for the mechanical hydraulic control device based on a measurement value of an opening degree of the starting device, a reference value of the opening degree of the starting device, and a set value for determining a relationship between the measurement value of the opening degree of the starting device and the reference value of the opening degree of the starting device; A mechanical hydraulic control device monitoring device comprising:

2. 2. The mechanical hydraulic control device monitoring device according to claim 1, further comprising a display unit that determines and displays a cause of a failure of the mechanical hydraulic control device based on a measured value of the opening of the starting device, a reference value of the opening of the starting device, and the set value.

3. A mechanical hydraulic control device monitoring device that monitors a mechanical hydraulic control device that controls a regulator valve that controls a fluid for a turbine, the mechanical hydraulic control device comprising: a hydraulic relay that operates when a control oil is supplied thereto; a control oil supply unit that supplies the control oil to the hydraulic relay; a control oil supply valve that supplies the control oil to the control oil supply unit and controls the amount of the control oil supplied to the control oil supply unit; and a synchronizer that controls the control oil supply unit, a recording unit that records the measurement value of the opening degree of the regulator valve and the measurement value of the opening degree of the synchronizer in association with each other; a setting unit in which a reference value of the opening degree of the regulating valve and a reference value of the opening degree of the synchronizing device are set in correspondence with each other; an alarm unit that outputs an alarm for the mechanical hydraulic control device based on a measurement value of the opening of the synchronizer, a reference value of the opening of the synchronizer, and a set value for determining a relationship between the measurement value of the opening of the synchronizer and the reference value of the opening of the synchronizer; A mechanical hydraulic control device monitoring device comprising:

4. 4. The mechanical hydraulic control device monitoring device according to claim 3, further comprising a display unit that determines and displays a cause of a failure of the mechanical hydraulic control device based on a measured value of the opening of the synchronizer, a reference value of the opening of the synchronizer, and the set value.

5. A mechanical hydraulic control device monitoring device that monitors a mechanical hydraulic control device that controls a regulator valve that controls a fluid for a turbine, the mechanical hydraulic control device comprising: a hydraulic relay that operates when a control oil is supplied thereto; a control oil supply unit that supplies the control oil to the hydraulic relay; a control oil supply valve that supplies the control oil to the control oil supply unit and controls the amount of the control oil supplied to the control oil supply unit; and a start-up device that controls the control oil supply valve, a recording unit that records a measurement value of the opening degree of the control oil supply valve and a measurement value of the opening degree of the starting device in association with each other; a setting unit in which a reference value of the opening degree of the control oil supply valve and a reference value of the opening degree of the starting device are set in correspondence with each other; an alarm unit that outputs an alarm for the mechanical hydraulic control device based on a measurement value of the opening of the control oil supply valve, a reference value of the opening of the control oil supply valve, and a set value for determining a relationship between the measurement value of the opening of the control oil supply valve and the reference value of the opening of the control oil supply valve; A mechanical hydraulic control device monitoring device comprising:

6. 6. The mechanical hydraulic control device monitoring device according to claim 5, further comprising a display unit that determines and displays a cause of a failure of the mechanical hydraulic control device based on a measured value of the opening of the control oil supply valve, a reference value of the opening of the control oil supply valve, and the set value.

7. A mechanical hydraulic control device monitoring device that monitors a mechanical hydraulic control device that controls a regulator valve that controls a fluid for a turbine, the mechanical hydraulic control device comprising: a hydraulic relay that operates when a control oil is supplied thereto; a control oil supply unit that supplies the control oil to the hydraulic relay; a control oil supply valve that supplies the control oil to the control oil supply unit and controls the amount of the control oil supplied to the control oil supply unit; a synchronization device that controls the control oil supply unit; and a start-up device that controls the control oil supply valve, a recording unit that records a measurement value of the opening of the regulator valve and a measurement value of the opening of the starting device in association with each other, records a measurement value of the opening of the regulator valve and a measurement value of the opening of the synchronizer in association with each other, and records a measurement value of the opening of the control oil supply valve and a measurement value of the opening of the starting device in association with each other; a setting unit in which a reference value of the opening of the regulating valve and a reference value of the opening of the starting device are set in correspondence with each other, a reference value of the opening of the regulating valve and a reference value of the opening of the synchronizing device are set in correspondence with each other, and a reference value of the opening of the control oil supply valve and a reference value of the opening of the starting device are set in correspondence with each other; a display unit that determines and displays a cause of a failure of the mechanical hydraulic control device based on a measured value of an opening of the starting device, a reference value of the opening of the starting device, a set value for determining a relationship between the measured value of the opening of the starting device and the reference value of the opening of the starting device, a measured value of the opening of the synchronizer, a reference value of the opening of the synchronizer, a set value for determining a relationship between the measured value of the opening of the synchronizer and the reference value of the opening of the synchronizer, a measured value of the opening of the control oil supply valve, a reference value of the opening of the control oil supply valve, and a set value for determining a relationship between the measured value of the opening of the control oil supply valve and the reference value of the opening of the control oil supply valve; A mechanical hydraulic control device monitoring device comprising:

8. The control valve; The mechanical hydraulic control device; A machine hydraulic control device monitoring device according to any one of claims 1 to 7; A control system comprising:

9. A mechanical hydraulic control device monitoring method for monitoring a mechanical hydraulic control device that controls a regulator valve that controls a fluid for a turbine, the mechanical hydraulic control device comprising: a hydraulic relay that operates when a control oil is supplied thereto; a control oil supply unit that supplies the control oil to the hydraulic relay; a control oil supply valve that supplies the control oil to the control oil supply unit and controls the amount of the control oil supplied to the control oil supply unit; and a start-up device that controls the control oil supply valve, The measured value of the opening degree of the regulator valve and the measured value of the opening degree of the starting device are recorded in a recording unit in association with each other, A reference value of the opening degree of the regulating valve and a reference value of the opening degree of the starting device are acquired from a setting unit in which the reference value of the opening degree of the regulating valve and the reference value of the opening degree of the starting device are set in correspondence with each other; an alarm unit outputs an alarm for the mechanical hydraulic control device based on a measurement value of an opening degree of the starting device, a reference value of the opening degree of the starting device, and a set value for determining a relationship between the measurement value of the opening degree of the starting device and the reference value of the opening degree of the starting device; Method for monitoring mechanical hydraulic control devices.

10. 10. The method for monitoring a mechanical hydraulic control device according to claim 9, further comprising determining a cause of a failure of the mechanical hydraulic control device based on a measured value of the opening of the starting device, a reference value of the opening of the starting device, and the set value, and displaying the cause of the failure on a display unit.

11. A mechanical hydraulic control device monitoring method for monitoring a mechanical hydraulic control device that controls a regulator valve that controls a fluid for a turbine, the mechanical hydraulic control device comprising: a hydraulic relay that operates when a control oil is supplied thereto; a control oil supply unit that supplies the control oil to the hydraulic relay; a control oil supply valve that supplies the control oil to the control oil supply unit and controls the amount of the control oil supplied to the control oil supply unit; and a synchronizer that controls the control oil supply unit, The measured value of the opening degree of the regulator valve and the measured value of the opening degree of the synchronizer are recorded in a recording unit in association with each other; A reference value of the opening of the synchronizer is acquired from a setting unit in which a reference value of the opening of the regulating valve and a reference value of the opening of the synchronizer are set in correspondence with each other; an alarm unit outputs an alarm for the mechanical hydraulic control device based on a measurement value of an opening of the synchronizer, a reference value of the opening of the synchronizer, and a set value for determining a relationship between the measurement value of the opening of the synchronizer and the reference value of the opening of the synchronizer; Method for monitoring mechanical hydraulic control devices.

12. The mechanical hydraulic control device monitoring method according to claim 11, further comprising determining a cause of failure of the mechanical hydraulic control device based on a measured value of the opening of the synchronizer, a reference value of the opening of the synchronizer, and the set value, and displaying the cause of failure on a display unit.

13. A mechanical hydraulic control device monitoring method for monitoring a mechanical hydraulic control device that controls a regulator valve that controls a fluid for a turbine, the mechanical hydraulic control device comprising: a hydraulic relay that operates when a control oil is supplied thereto; a control oil supply unit that supplies the control oil to the hydraulic relay; a control oil supply valve that supplies the control oil to the control oil supply unit and controls the amount of the control oil supplied to the control oil supply unit; and a start-up device that controls the control oil supply valve, a measurement value of the opening degree of the control oil supply valve and a measurement value of the opening degree of the starting device are recorded in a recording unit in association with each other; a reference value of the opening degree of the control oil supply valve is acquired from a setting unit in which a reference value of the opening degree of the control oil supply valve and a reference value of the opening degree of the starting device are set in correspondence with each other; an alarm unit outputs an alarm for the mechanical hydraulic control device based on a measurement value of the opening of the control oil supply valve, a reference value of the opening of the control oil supply valve, and a set value for determining a relationship between the measurement value of the opening of the control oil supply valve and the reference value of the opening of the control oil supply valve; Method for monitoring mechanical hydraulic control devices.

14. 14. The method for monitoring a mechanical hydraulic control device according to claim 13, further comprising determining a cause of a failure of the mechanical hydraulic control device based on a measured value of the opening of the control oil supply valve, a reference value of the opening of the control oil supply valve, and the set value, and displaying the cause of the failure on a display unit.

15. A mechanical hydraulic control device monitoring method for monitoring a mechanical hydraulic control device that controls a regulator valve that controls a fluid for a turbine, the mechanical hydraulic control device comprising: a hydraulic relay that operates when a control oil is supplied thereto; a control oil supply unit that supplies the control oil to the hydraulic relay; a control oil supply valve that supplies the control oil to the control oil supply unit and controls the amount of the control oil supplied to the control oil supply unit; a synchronizer that controls the control oil supply unit; and a start-up device that controls the control oil supply valve, The measured value of the opening degree of the regulator valve and the measured value of the opening degree of the starting device are recorded in a recording unit in association with each other, A reference value of the opening degree of the regulating valve and a reference value of the opening degree of the starting device are acquired from a setting unit in which the reference value of the opening degree of the regulating valve and the reference value of the opening degree of the starting device are set in correspondence with each other; The measurement value of the opening degree of the regulator valve and the measurement value of the opening degree of the synchronizer are recorded in the recording unit in association with each other, A reference value of the opening of the synchronizer is acquired from the setting unit, in which a reference value of the opening of the regulating valve and a reference value of the opening of the synchronizer are set in correspondence with each other; a measurement value of the opening degree of the control oil supply valve and a measurement value of the opening degree of the starting device are recorded in the recording unit in association with each other; a reference value of the opening degree of the control oil supply valve is acquired from the setting unit, in which a reference value of the opening degree of the control oil supply valve and a reference value of the opening degree of the starting device are set in correspondence with each other; a failure factor of the mechanical hydraulic control device is determined based on a measured value of an opening of the starting device, a reference value of the opening of the starting device, a set value for determining a relationship between the measured value of the opening of the starting device and the reference value of the opening of the starting device, a measured value of the opening of the synchronizer, a reference value of the opening of the synchronizer, a set value for determining a relationship between the measured value of the opening of the synchronizer and the reference value of the opening of the synchronizer, a measured value of the opening of the control oil supply valve, a reference value of the opening of the control oil supply valve, and a set value for determining a relationship between the measured value of the opening of the control oil supply valve and the reference value of the opening of the control oil supply valve. Method for monitoring mechanical hydraulic control devices.

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