WO2022014139A1 - Drive mechanism for air-operated valve - Google Patents

Drive mechanism for air-operated valve Download PDF

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Publication number
WO2022014139A1
WO2022014139A1 PCT/JP2021/018568 JP2021018568W WO2022014139A1 WO 2022014139 A1 WO2022014139 A1 WO 2022014139A1 JP 2021018568 W JP2021018568 W JP 2021018568W WO 2022014139 A1 WO2022014139 A1 WO 2022014139A1
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WO
WIPO (PCT)
Prior art keywords
air
operated valve
valve
drive mechanism
open
Prior art date
Application number
PCT/JP2021/018568
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French (fr)
Japanese (ja)
Inventor
聖 平野
大助 平澤
賢司 小野寺
芳久 清時
Original Assignee
日立Ｇｅニュークリア・エナジー株式会社
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Application filed by 日立Ｇｅニュークリア・エナジー株式会社 filed Critical 日立Ｇｅニュークリア・エナジー株式会社
Publication of WO2022014139A1 publication Critical patent/WO2022014139A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21D—NUCLEAR POWER PLANT
    • G21D1/00—Details of nuclear power plant
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin

Definitions

  • the present invention relates to an air-operated valve.
  • the air-operated isolation valve used in conventional nuclear power plants has a File to Close function (the valve automatically closes when operating air is lost) for the purpose of isolating the reactor in the event of an accident.
  • the time of an accident means a state in which the normal power supply is lost and the emergency power supply is started or the operating air is lost.
  • isolation valves are used in the system necessary for cooling the reactor in the event of an accident. Therefore, it is necessary to maintain the flow path of these isolation valves even in the event of an accident, and a Fail as is (keeping the valve open / closed state when the normal power supply is lost or the operating air is lost) is required.
  • electric valves are used for valves that require a File as is function (hereinafter referred to as an open / closed state maintenance function).
  • the present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a drive mechanism for an air-operated valve capable of switching between an open / closed state maintaining function and forced closing.
  • the drive mechanism of the air-operated valve of the present invention includes an open / closed state maintaining means for maintaining an open / closed state of an air-operated valve operated by operating air when an abnormality occurs, and an open / closed state maintaining mode of the air-operated valve. It is provided with a first closed state switching means for switching from to closed state mode.
  • FIG. 4 is a schematic diagram of a sequence in which the signal of the third solenoid valve of the valve drive unit is unintentionally turned off from the state of FIG. 4A.
  • FIG. 4 is a schematic diagram of a sequence in which the signal of the first solenoid valve of the valve drive unit is unintentionally turned off from the state of FIG. 4A.
  • the schematic diagram of the surveillance mode sequence of the valve drive part which concerns on Embodiment 3 of this invention.
  • the schematic diagram of the surveillance mode sequence of the valve drive part which concerns on Embodiment 4 of this invention.
  • the schematic diagram of the sequence of the open mode of the valve drive part which concerns on Embodiment 5 of this invention.
  • Embodiment 1 relates to a valve drive portion having an air actuating portion.
  • FIG. 1 shows a schematic diagram of a sequence applied to the valve drive unit K1 according to the first embodiment of the present invention.
  • the valve drive unit K1 of the first embodiment is a mechanism for opening and closing the main valve B by operating the operating air 10 (high pressure air).
  • FIG. 1 shows a sequence in which the valve drive unit K1 supplies the operating air 10 into the cylinder 1 and pushes up the piston 3.
  • the main valve (air operated valve) B is in the open state.
  • the main valve B can be used, for example, as an isolation valve for a main steam pipe connected from a reactor to a turbine in a nuclear power plant. Some valves in the main steam pipe are required to be closed when a problem such as a signal cutoff occurs in a nuclear power plant.
  • the valve drive unit K1 uses a cylinder 1 in which the spring 2 and the piston 3 are housed, and the first solenoid valve d1 and the second solenoid valve d2 of the three-way valve as the switching function of the main valve B.
  • the supply port 10i is a supply port for supplying operating air, which is high-pressure air.
  • the discharge port 10o is a discharge port for discharging the operating air 10.
  • a spring 2 is provided in the space s1 on one side of the piston 3 in the cylinder 1, and the operating air 10 is supplied or discharged from the space s2 on the other side.
  • the operating air 10 in the space s2 is referred to as a closed operating air 11.
  • the piston 3 moves in the cylinder 1 by the elastic force of the spring 2 and the air pressure of the sealing operation air 11.
  • the sealing operation air 11 By supplying the sealing operation air 11 to the space s2 of the cylinder 1, the piston 3 and the piston rod 4 move to one side (Open) against the elastic force of the spring 2, and the main valve B is opened. ..
  • the sealing operation air 11 is discharged from the space s2 of the cylinder 1, the piston 3 and the piston rod 4 move to the other side (Close) due to the elastic force of the spring 2, and the main valve B is closed. Will be done.
  • the first solenoid valve d1 of the three-way valve has an opening 5a that always opens, an opening 6a that opens and closes depending on the presence or absence of a signal, a closing portion 7a that opens and closes depending on the presence or absence of a signal, a spring portion 8a, and a solenoid portion 9a. ..
  • a signal is supplied (on) to the solenoid unit 9a by a normal power supply.
  • the opening 6a opens when a signal is supplied to the solenoid unit 9a (with a signal), and closes when the signal is turned off (without a signal).
  • the opening 7a is closed when a signal is supplied to the solenoid unit 9a (with a signal), and is opened when the signal is turned off (without a signal).
  • the opening 5a is always open.
  • the second solenoid valve d2 of the three-way valve has an opening 5b that is always closed, an opening 6b that is always open, an opening 7b that opens and closes depending on the presence or absence of a signal, a spring portion 8b, and a solenoid portion 9b.
  • a signal is supplied (on) to the solenoid unit 9b by a normal or emergency power supply.
  • the opening 5b is always closed by using a closing plate or the like as described above.
  • the opening 7b opens when a signal is supplied to the solenoid unit 9b (with a signal), and closes when the signal is turned off (without a signal).
  • valve drive unit K1 In the valve drive unit K1, the operating air 10 is supplied from the supply port 10i to the space s2 on the piston rod 4 side of the cylinder 1.
  • the valve drive unit K1 changes the flow path of the operating air 10 by each excitation / non-excitation of the first solenoid valve d1 and the second solenoid valve d2.
  • the position of the piston 3 of the cylinder 1 is operated to one side (Open) by supplying the operating air 10 to the space s2 of the cylinder 1 through the opening 6a and the opening 5a.
  • the main valve B By operating the piston 3 to one side (Open), the main valve B is opened.
  • the position of the piston 3 is operated to the other side (Close) by discharging the operating air 10 from the discharge port 10o through the openings 5a, the openings 7a and 7b, and the opening 6b.
  • the main valve B is closed.
  • FIG. 1 shows the sequence of the first embodiment of FIG. 1
  • the main valve B can be closed in this sequence by the connection mechanism with the main valve B.
  • FIG. 2 shows an open / closed state maintenance (Fail as is) sequence for maintaining the state of the main valve B.
  • FIG. 3 shows a sequence in which the main valve B is in the closed state.
  • the valve drive unit K1 that drives the main valve B which is an air-operated valve, opens the main valve B in an "open” mode (see FIG. 1), an "open / close state (Fail as is)” mode (see FIG. 2), and "closed”. It has a sequence in which it is in a mode (see FIG. 3). The order of each mode of "open”, “Fail as", and “closed” is arbitrary.
  • the "open” mode of the main valve B shown in FIG. 1 is realized when the solenoid portion 9a of the first solenoid valve d1 is "on” and the solenoid portion 9b of the second solenoid valve d2 is "off".
  • the opening 6a is “opened” and the opening 7a is “closed”.
  • the opening 5a is always open.
  • the second solenoid valve d2 when the solenoid portion 9b is a regular or emergency power source and the signal is "off", the opening portion 7b is "closed”.
  • the opening 5b is always closed.
  • the opening 6b is always open.
  • the operating air 10 is supplied from the supply port 10i to the space s2 of the cylinder 1 through the "open" opening 6a of the first solenoid valve d1 and the opening 5a of the constant opening (arrow in FIG. 1). ⁇ 11).
  • the main valve B is fully opened.
  • the opening 7a of the first solenoid valve d1 is "closed", the operating air 10 cannot pass through.
  • the operating air 10 in the space s2 of the cylinder 1 can pass through the opening 5a and the opening 7a of the first solenoid valve d1, but cannot pass through the "closed" opening 7b of the second solenoid valve d2. Therefore, the sealed operating air 11 in the space s2 of the cylinder 1 is in a state of being cut off by the operating air supply port 10i and the operating air discharge port 10o. In this case, the state of the main valve B (open / closed state) can be maintained even when the supplied operating air 10, the normal power supply signal, and the emergency power supply signal are lost. At this time, since the sealing operation air 11 is retained in the cylinder 1, the main valve B is maintained in the open state.
  • the sealed operating air 11 in the space s2 of the cylinder 1 is maintained in that state, and the main valve B is maintained in the open / closed state at that time. It is also possible to keep the main valve B in the closed state.
  • the sequence in the closed state of the main valve B is realized when the first solenoid valve d1 is "off” and the second solenoid valve d1 is "on".
  • the solenoid portion 9a of the first solenoid valve d1 is a regular power source and the signal is "off”
  • the opening 6a is “closed”
  • the opening 7a is “open”.
  • the opening 5a is always open.
  • the solenoid portion 9b is a regular or emergency power source and the signal is "on
  • the opening 7b is "opened” and the opening 6b is always open.
  • the opening 5b is always closed.
  • the sealing operation air 11 in the space s2 of the cylinder 1 has the opening 5a of the constant opening of the first solenoid valve d1, the opening 7a of the "open”, and the opening 7b of the "open” of the second solenoid valve d2. It passes through the opening 6b of the constant opening and is exhausted from the discharge port 10o.
  • a valve for an air-operated valve having a simple and highly reliable sequence and having an open / closed state maintenance (Fail is) function and a forced closing function from the open / closed state maintenance state using an emergency power supply.
  • the drive unit K1 can be provided.
  • valve drive unit K1 can be forced to close from the open / closed state maintenance mode, it can be applied to the isolation valve of a nuclear power plant.
  • the valve drive unit K1 can be applied to a valve other than the isolation valve, and is also applicable to a valve for which an electric valve cannot be adopted because it does not have a regular large-capacity power supply.
  • FIG. 4A shows a schematic diagram of the sequence of the valve drive unit K2 according to the second embodiment of the present invention.
  • FIG. 4B shows a schematic diagram of a sequence in which the signal of the third solenoid valve d3 of the valve drive unit K2 is turned off from the state of FIG. 4A.
  • FIG. 4C shows a schematic diagram of a sequence in which the signal of the first solenoid valve d1 of the valve drive unit K2 is turned off from the state of FIG. 4A.
  • the valve drive unit K2 of the second embodiment shown in FIG. 4A is a mechanism for improving the reliability of opening the main valve (air operated valve) B.
  • the valve drive unit K2 is a mechanism that improves the reliability of continuously supplying the operating air 10 to the cylinder 1.
  • the valve drive unit K2 has a configuration in which the third solenoid valve d3 of the three-way valve is added to the valve drive unit K1 of the first embodiment. Since the other configurations are the same as those in the first embodiment, the same components are designated by the same reference numerals, and detailed description thereof will be omitted.
  • a third solenoid valve d3 for supplying the operating air 10 into the cylinder 1 is added to the valve drive unit K1 of the first embodiment. Therefore, the valve drive unit K2 can continue to send the operating air 10 into the cylinder 1 even if either the first solenoid valve d1 or the third solenoid valve d3 fails.
  • the third solenoid valve d3 has an opening 5c that always opens, an opening 6c that opens and closes depending on the presence or absence of a signal, a closing portion 7c that opens and closes depending on the presence or absence of a signal, a spring portion 8c, and a solenoid portion 9c.
  • a signal is supplied to the solenoid portion 9c of the third solenoid valve d3 by a regular power supply.
  • the opening 6c opens when a signal is supplied to the solenoid unit 9c (with a signal), and closes when the signal is turned off (without a signal).
  • the opening 7c is closed when a signal is supplied to the solenoid unit 9c (with a signal), and is opened when the signal is turned off (without a signal).
  • the opening 5c is always open as described above.
  • the signal of the solenoid section 9a is turned on by the normal power supply for the first solenoid valve d1
  • the signal of the solenoid section 9c is turned on by the normal power supply for the third solenoid valve d3, and the second solenoid valve d3 is turned on.
  • the solenoid valve d2 is controlled to turn off the signal of the solenoid unit 9b by a normal or emergency power supply.
  • the opening 6a is opened and the opening 7a is closed when the signal of the solenoid portion 9a is turned on.
  • the opening 5a is always open.
  • the opening 6c is opened and the opening 7c is closed when the signal of the solenoid portion 9c is turned on.
  • the opening 5c is always open.
  • the opening 7b of the second solenoid valve d2 is closed when the signal of the solenoid portion 9b is turned off.
  • the opening 5b is always closed, and the opening 6b is always open. Due to the above-mentioned open / closed state, the operating air 10 is supplied from the supply port 10i to the space s2 of the cylinder 1 through the “open” opening 6a of the first solenoid valve d1 and the constantly open opening 5a (FIG. 4A). Arrow ⁇ 21).
  • the piston 3 is operated to one side (Open) against the elastic force of the spring 2, and the main valve B is opened.
  • the operating air 10 passes through the “open” opening 6c of the first solenoid valve d1 and the opening 5c of the constant opening (arrow ⁇ 22 in FIG. 4A) from the supply port 10i, but the opening of the first solenoid valve d1. 7a is closed and cannot pass through.
  • the opening 6a of the first solenoid valve d1 is opened. It closes and the opening 7a opens.
  • the operating air 10 has an opening 6c of the third solenoid valve d3 "open", an opening 5c of the constant opening, an opening 7a of the "open” of the first solenoid valve d1, and a constant opening from the supply port 10i. Since the main valve B is supplied to the space s2 of the cylinder 1 through the opening 5a (arrow ⁇ 23 in FIG. 4C), the main valve B can continue to open.
  • the sealing operation air 11 continues to push up the piston 3 by the first solenoid valve d1 or the third solenoid valve d3. Therefore, the reliability of the opening operation of the main valve B can be improved. Therefore, the main valve B driven by the valve drive unit K2 has a sequence suitable for a valve that requires reliability of open operation, such as a main steam isolation valve of a nuclear power plant.
  • FIG. 5 shows a schematic diagram of the surveillance mode sequence of the valve drive unit K3 according to the third embodiment of the present invention.
  • a mode for checking whether the valve body is stuck and stuck (whether it works reliably) from the open state of the main valve (air operated valve) B. Is required. This mode is referred to as surveillance mode.
  • the valve drive unit K3 of the third embodiment is a valve drive mechanism having a surveillance mode of the main valve B.
  • the valve drive unit K3 is provided with a third solenoid valve d4 of a three-way valve, a speed controller 12, and a discharge port 10t of operating air 10 for testing in the valve drive unit K1 of the first embodiment. Since the other configurations are the same as those in the first embodiment, the same components are designated by the same reference numerals, and detailed description thereof will be omitted.
  • the fourth solenoid valve d4 has an opening 5d that always opens, an opening 6d that opens and closes depending on the presence or absence of a signal, a closing portion 7d that opens and closes depending on the presence or absence of a signal, a spring portion 8d, and a solenoid portion 9d.
  • One end of the pipeline k1 is connected to the opening 6d of the fourth solenoid valve d4, and a test discharge port 10t of the operating air 10 for testing is provided at the other end of the pipeline k1.
  • a speed controller 12 capable of reducing the flow rate of the air flow is provided upstream of the test discharge port 10t of the pipeline k1.
  • a signal is supplied to the solenoid portion 9d of the fourth solenoid valve d4 by a regular power supply.
  • the opening 6d is opened and the opening 7d is closed when the signal of the solenoid portion 9d is turned on.
  • the opening 5d is always open. Specifically, the opening 6d opens when the solenoid unit 9d signal is supplied (with a signal), and closes when the signal to the solenoid unit 9d is turned off (without a signal).
  • the opening 7d is closed when a signal is supplied to the solenoid unit 9d (with a signal), and is opened when the signal to the solenoid unit 9d is turned off (without a signal).
  • the opening 5d is always open.
  • the surveillance mode of the valve drive unit K3 is during the operation of the surveillance test, and is a mode in which the main valve B is gently closed from the fully open position to the intermediate opening degree.
  • the first solenoid valve d1 of the valve drive unit K3 has a signal on
  • the second solenoid valve d2 has a signal off
  • the fourth solenoid valve d4 has a signal off.
  • the main valve B shifts from fully open to the surveillance mode, the main valve B shifts to the intermediate opening, so that the first solenoid valve d1 of the valve drive unit K3 has a signal off, the second solenoid valve d2 has a signal off, and the fourth solenoid valve has a signal off.
  • the valve d4 is signal-on.
  • the opening 6a is closed and the opening 7a is opened when the signal of the solenoid portion 9a is turned off.
  • the opening 5a is always open.
  • the opening 7b of the second solenoid valve d2 is closed when the signal of the solenoid portion 9b is turned off.
  • the opening 6b is always open.
  • the opening 5b is always closed.
  • the opening 6d is opened and the opening 7d is closed when the signal of the solenoid portion 9d is turned on.
  • the opening 5d is always open.
  • the sealing operation air 11 in the space s2 of the cylinder 1 has the opening 5a of the constant opening of the first solenoid valve d1, the opening 7a of the "open” and the opening 5d of the constant opening of the fourth solenoid valve d4.
  • the flow rate is throttled by the speed controller 12 of the pipeline k1 (for example, the displacement is throttled by 10%), and the flow rate is discharged from the test discharge port 10t.
  • the opening degree of the main valve B can be controlled by setting the valve drive unit K3 to the surveillance mode and using the speed controller 12 to reduce the displacement of the sealing operation air 11 in the cylinder 1.
  • FIG. 6 shows a schematic diagram of the surveillance mode sequence of the valve drive unit K4 according to the fourth embodiment of the present invention.
  • the valve drive unit K4 of the fourth embodiment is a sequence in which the reliability of the opening operation of the main valve B is improved by combining the second embodiment and the third embodiment, and the surveillance mode is provided.
  • the valve drive unit K4 has a fourth solenoid valve d4 described in the third embodiment, a test discharge port 10t, and a speed between the second solenoid valve d2 and the third solenoid valve d3 of the valve drive unit K2 of the second embodiment.
  • a pipeline k1 having a controller 12 is provided.
  • the surveillance mode of the valve drive unit K4 is during the operation of the surveillance test, and is a mode in which the main valve B is gently closed from the fully open position to the intermediate opening degree (for example, 90% opening degree).
  • the first solenoid valve d1 of the valve drive unit K4 has a signal on
  • the second solenoid valve d2 has a signal off
  • the third solenoid valve d3 has a signal on
  • the fourth solenoid valve d4 has a signal off.
  • the first solenoid valve d1 has a signal off
  • the second solenoid valve d2 has a signal off
  • the third solenoid valve d3 has a signal off
  • the fourth solenoid valve d4 has a signal on. Will be done.
  • the opening 6a of the first solenoid valve d1 is closed and the opening 7a is opened due to the signal of the solenoid portion 9a being turned off.
  • the opening 5a is always open.
  • the opening 6b is opened and the opening 7b is closed when the signal of the solenoid portion 9b is turned off.
  • the opening 5b is always closed.
  • the opening 6c is closed and the opening 7c is opened when the signal of the solenoid portion 9c is turned off.
  • the opening 5c is always open.
  • the opening 6d is opened and the opening 7d is closed when the signal of the solenoid portion 9d is turned on.
  • the opening 5d is always open.
  • the sealing operation air 11 in the space s2 of the cylinder 1 has the opening 5a of the constant opening of the first solenoid valve d1, the opening 7a of the "open” and the opening 5c of the constant opening of the third solenoid valve d3.
  • the flow rate is throttled by the speed controller 12 of the pipeline k1 through the opening 7c of the "open", the opening 5d of the constant opening of the fourth solenoid valve d4, and the opening 6d of the "open” (arrow ⁇ 41 in FIG. 6). (For example, the displacement is reduced by 10%), and the test discharge port 10t is discharged.
  • the opening degree of the main valve B can be controlled by setting the valve drive unit K4 to the surveillance mode and reducing the displacement of the sealed operation air 11 in the cylinder 1 by using the speed controller 12.
  • the operating air 10 can continue to push up the piston 3 by the first solenoid valve d1 or the third solenoid valve d3 as long as both the first solenoid valve d1 and the third solenoid valve d3 do not fail. .. Therefore, the reliability of the opening operation of the main valve B can be improved. Therefore, the main valve B driven by the valve drive unit K4 has a sequence suitable for a valve that requires reliability of open operation, such as a main steam isolation valve of a nuclear power plant.
  • FIG. 7 shows a schematic diagram of an open mode sequence of the valve drive unit K5 according to the fifth embodiment of the present invention.
  • the valve drive unit K5 of the fifth embodiment has a configuration in which a blast valve 13 is provided side by side with the valve drive unit K4 of the fourth embodiment to have multiple functions for releasing the open / closed state maintaining function (Fail as is function).
  • the valve drive unit K5 is the valve drive unit K4 (see FIG. 6) of the fourth embodiment, and instead of the second solenoid valve d2 and the discharge port 10o, the valve drive unit K5 is a three-way valve fifth solenoid valve d5 and a discharge port controlled by an emergency power supply. 10o1 is provided, and a blast valve 13 is provided downstream of the fifth solenoid valve d5.
  • the blast valve 13 is controlled by a booster 9f controlled by an emergency power supply.
  • the blast valve 13 is in a closed state when the current signal from the booster 9f is turned off, and the current signal from the booster 9f is supplied to blast and open the blast valve 13.
  • the fifth solenoid valve d5 of the three-way valve has an opening 5e that always opens, an opening 6e that opens and closes depending on the presence or absence of a signal, a closing portion 7e that opens and closes depending on the presence or absence of a signal, a spring portion 8e, and a solenoid portion 9e. ..
  • a signal is supplied to the solenoid portion 9e of the fifth solenoid valve d5 by an emergency power supply.
  • the opening 6e opens when the solenoid unit 9e signal is supplied (with signal), and closes when the signal is off (without signal).
  • the opening 7e is closed when a signal is supplied to the solenoid unit 9e (with a signal), and is opened when the signal is off (without a signal).
  • the opening 5e is always open.
  • FIG. 7 shows a fully open maintenance state of the main valve B in the open / closed state maintenance function (Fail as is function).
  • the main valve B is in the open state before the operation of the open / closed state maintaining function of FIG. 7, the first solenoid valve d1 and the third solenoid valve d3 are signal-on, and the operating air 10 is opened from the supply port 10i to the openings 6a and 5a. It is supplied to the space s2 of the cylinder 1 through the space s2.
  • the signals of the fourth solenoid valve d4, the fifth solenoid valve d5, and the blast valve 13 are off.
  • the first solenoid valve d1, the third solenoid valve d3, the fourth solenoid valve d4, and the fifth solenoid valve d5 are turned off because of an abnormal condition.
  • the space s2 of the cylinder 1 is the openings 5a and 7a of the first solenoid valve d1, the openings 5c and 7c of the third solenoid valve d3, the openings 5d and 7d of the fourth solenoid valve d4, and the fifth solenoid valve. It leads to the openings 5e and 7e of d5 (arrow ⁇ 51 in FIG. 7).
  • the valve drive unit K5 is the fifth solenoid valve d5 or the blast valve 13 and has the open / closed state maintaining function (Fail is function) shown in FIG. It is possible to change the main valve B from the "open" state to the "closed” state.
  • the surveillance mode is possible. According to the configuration of the valve drive unit K5, it is possible to obtain a sequence in which the opening / closing state maintaining function (Fail is function) is released with multiplex, and the reliability of releasing the opening / closing state maintaining function is improved.
  • the solenoid valve has been described as an example as the switching function, but if the switching function is provided, switching other than the solenoid valve such as a motor-driven electric valve, a blast valve, and a switching valve using a solenoid valve is used. Means may be used.
  • valve drive unit air-operated valve drive mechanism
  • the normal power supply and the emergency power supply are given as examples of the power supply. It can be combined to supply power. This makes it possible to make the equipment more reliable and operable.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Driven Valves (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

A drive mechanism (K1) for an air-operated valve (B) according to the present invention comprises: an open/closed state maintenance means (d1, d2, 1, 2, 3, 4) which, upon the occurrence of an abnormality, maintains the open/closed state of the air-operated valve (B) that is operated by operating air (10); and a first closed state switching means (d2) which switches the air-operated valve (B) from an open/closed state maintenance mode to a closed state mode.

Description

空気作動弁の駆動機構Air-operated valve drive mechanism
　本発明は、空気作動型弁に関する。 The present invention relates to an air-operated valve.
　従来の原子力発電所に用いられる空気作動型の隔離弁は、事故時に原子炉を隔離することを目的として、Ｆａｉｌ to Ｃｌｏｓｅ (操作空気喪失時に弁が自動的に閉じる)機能が採用されている。なお、事故時とは、常用電源が喪失し、非常用電源起動の状態又は操作空気が喪失した状態をいう。 The air-operated isolation valve used in conventional nuclear power plants has a File to Close function (the valve automatically closes when operating air is lost) for the purpose of isolating the reactor in the event of an accident. In addition, the time of an accident means a state in which the normal power supply is lost and the emergency power supply is started or the operating air is lost.
　一方、隔離弁の中には事故時の原子炉冷却のために必要な系統に用いられているものもある。そのため、これらの隔離弁については事故時も流路を保つ必要があり、Ｆａｉｌ　ａｓ　ｉｓ (常用電源喪失又は操作空気喪失時に弁の開閉状態を保つ)機能が要求されている。なお、現状では、Ｆａｉｌ　ａｓ　ｉｓ機能(以下、開閉状態維持機能と称す)が要求される弁については電動弁が採用されている。 On the other hand, some isolation valves are used in the system necessary for cooling the reactor in the event of an accident. Therefore, it is necessary to maintain the flow path of these isolation valves even in the event of an accident, and a Fail as is (keeping the valve open / closed state when the normal power supply is lost or the operating air is lost) is required. At present, electric valves are used for valves that require a File as is function (hereinafter referred to as an open / closed state maintenance function).
特開昭６１－２８２６０２号公報Japanese Unexamined Patent Publication No. 61-282602
　上述の事故時の原子炉冷却のために必要な系統はＦａｉｌ　ａｓ　ｉｓ機能が要求される一方で、当該系統の配管に破断が発生した場合は、弁を意図的に閉操作する必要もある。但し、従来のＦａｉｌ　ａｓ　ｉｓ機能の空気作動弁には、事故時に開閉状態を維持する機能はあるものの、強制的に閉操作する機能は備えられていない。
　従来のＦａｉｌ　ａｓ　ｉｓ機能の空気作動弁には、強制的に閉操作する機能は備えられていないという技術課題がある。 While the system required for reactor cooling in the event of the above-mentioned accident is required to have a File is function, it is also necessary to intentionally close the valve when the piping of the system breaks. However, although the conventional air actuated valve having a File is function has a function of maintaining an open / closed state in the event of an accident, it does not have a function of forcibly closing the valve.
There is a technical problem that the conventional air actuated valve having a File is function does not have a function of forcibly closing the valve.
　本発明は上記実状に鑑み創案されたものであり、開閉状態維持機能と強制閉とを切り替え可能な空気作動弁の駆動機構の提供を目的とする。 The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a drive mechanism for an air-operated valve capable of switching between an open / closed state maintaining function and forced closing.
　前記課題を解決するため、本発明の空気作動弁の駆動機構は、操作空気で作動する空気作動弁の開閉状態を異常発生時に維持する開閉状態維持手段と、前記空気作動弁の開閉状態維持モードから閉状態モードに切替える第１閉状態切替手段とを備えている。 In order to solve the above problems, the drive mechanism of the air-operated valve of the present invention includes an open / closed state maintaining means for maintaining an open / closed state of an air-operated valve operated by operating air when an abnormality occurs, and an open / closed state maintaining mode of the air-operated valve. It is provided with a first closed state switching means for switching from to closed state mode.
　本発明によれば、開閉状態維持機能と強制閉とを切り替え可能な空気作動弁の駆動機構を提供することができる。 According to the present invention, it is possible to provide a drive mechanism for an air-operated valve that can switch between an open / closed state maintaining function and forced closing.
本発明に係る弁駆動部に適用するシーケンスの概略図。The schematic diagram of the sequence applied to the valve drive part which concerns on this invention. 主弁の状態を維持する開閉状態維持(Ｆａｉｌ　ａｓ　ｉｓ)シーケンスを示す図。The figure which shows the open / closed state maintenance (Fail as is) sequence which maintains the state of a main valve. 実施形態１の主弁が閉状態のシーケンスを示す図。The figure which shows the sequence in the closed state of the main valve of Embodiment 1. FIG. 本発明に係る実施形態の２弁駆動部のシーケンスの概略図。The schematic diagram of the sequence of the 2 valve drive part of the embodiment which concerns on this invention. 図４Ａの状態から弁駆動部の第３電磁弁の信号が意図することなくオフした状態のシーケンスの概略図。FIG. 4 is a schematic diagram of a sequence in which the signal of the third solenoid valve of the valve drive unit is unintentionally turned off from the state of FIG. 4A. 図４Ａの状態から弁駆動部の第１電磁弁の信号が意図することなくオフした状態のシーケンスの概略図。FIG. 4 is a schematic diagram of a sequence in which the signal of the first solenoid valve of the valve drive unit is unintentionally turned off from the state of FIG. 4A. 本発明の実施形態３に係る弁駆動部のサーベランスモードのシーケンスの概略図。The schematic diagram of the surveillance mode sequence of the valve drive part which concerns on Embodiment 3 of this invention. 本発明の実施形態４に係る弁駆動部のサーベランスモードのシーケンスの概略図。The schematic diagram of the surveillance mode sequence of the valve drive part which concerns on Embodiment 4 of this invention. 本発明の実施形態５に係る弁駆動部の開モードのシーケンスの概略図。The schematic diagram of the sequence of the open mode of the valve drive part which concerns on Embodiment 5 of this invention.
　本発明は、空気作動部を有する弁の駆動部に係る。
　以下、本発明の実施形態について、適宜図面を参照しながら詳細に説明する。
＜＜実施形態１＞＞ The present invention relates to a valve drive portion having an air actuating portion.
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
<< Embodiment 1 >>
　図１に、本発明の実施形態１に係る弁駆動部Ｋ１に適用するシーケンスの概略図を示す。
　実施形態１の弁駆動部Ｋ１は、主弁Ｂを操作空気１０(高圧空気)による操作によって開閉する機構である。図１は、弁駆動部Ｋ１が操作空気１０をシリンダー１内に供給し、ピストン３を押し上げるシーケンスを示す。この場合、主弁(空気作動弁)Ｂは開状態となる。
　主弁Ｂは、例えば原子力発電所において原子炉からタービンに接続される主蒸気配管の隔離弁に使用できる。主蒸気配管の弁は、原子力発電所において信号が遮断した等の問題が発生した際に閉弁することが要求される弁もある。 FIG. 1 shows a schematic diagram of a sequence applied to the valve drive unit K1 according to the first embodiment of the present invention.
The valve drive unit K1 of the first embodiment is a mechanism for opening and closing the main valve B by operating the operating air 10 (high pressure air). FIG. 1 shows a sequence in which the valve drive unit K1 supplies the operating air 10 into the cylinder 1 and pushes up the piston 3. In this case, the main valve (air operated valve) B is in the open state.
The main valve B can be used, for example, as an isolation valve for a main steam pipe connected from a reactor to a turbine in a nuclear power plant. Some valves in the main steam pipe are required to be closed when a problem such as a signal cutoff occurs in a nuclear power plant.
　弁駆動部Ｋ１は、主弁Ｂの切替機能として、バネ２、ピストン３が収容されるシリンダー１と、三方弁の第１電磁弁ｄ１および第２電磁弁ｄ２を用いる。
　供給口１０ｉは高圧空気である操作空気を供給する供給口。排出口１０ｏは操作空気１０を排出する排出口である。 The valve drive unit K1 uses a cylinder 1 in which the spring 2 and the piston 3 are housed, and the first solenoid valve d1 and the second solenoid valve d2 of the three-way valve as the switching function of the main valve B.
The supply port 10i is a supply port for supplying operating air, which is high-pressure air. The discharge port 10o is a discharge port for discharging the operating air 10.
　＜主弁Ｂとシリンダー１＞
　シリンダー１の内部には、圧縮コイルバネのバネ２と、バネ２に押圧されるピストン３と、ピストン３に一方端が固定されるピストンロッド４とが収容されている。
　ピストンロッド４の他方側には、主弁Ｂが設けられている。
　主弁Ｂは、ピストンロッド４の移動により開閉される。具体的には、ピストンロッド４に固定されるピストン３が一方側(図１の上方)(Open)に移動することで主弁Ｂが開弁される。また、ピストン３が他方側(図１の下方)(Close)に移動することで主弁Ｂが閉弁される。 <Main valve B and cylinder 1>
Inside the cylinder 1, a spring 2 of a compression coil spring, a piston 3 pressed by the spring 2, and a piston rod 4 having one end fixed to the piston 3 are housed.
A main valve B is provided on the other side of the piston rod 4.
The main valve B is opened and closed by the movement of the piston rod 4. Specifically, the main valve B is opened by moving the piston 3 fixed to the piston rod 4 to one side (upper side of FIG. 1) (Open). Further, the main valve B is closed by moving the piston 3 to the other side (lower side of FIG. 1) (Close).
　シリンダー１におけるピストン３の一方側の空間ｓ１にはバネ２が設けられ、他方側の空間ｓ２は操作空気１０が供給または排出される。空間ｓ２にある操作空気１０を密閉操作空気１１という。
　ピストン３は、バネ２の弾性力と密閉操作空気１１の空気圧によりシリンダー１内を移動する。
　シリンダー１の空間ｓ２に密閉操作空気１１が供給されることで、ピストン３およびピストンロッド４はバネ２の弾性力に抗して一方側(Open)に移動し、主弁Ｂは開弁される。これに対して、密閉操作空気１１がシリンダー１の空間ｓ２から排出されることで、ピストン３およびピストンロッド４はバネ２の弾性力により他方側(Close)に移動し、主弁Ｂは閉弁される。 A spring 2 is provided in the space s1 on one side of the piston 3 in the cylinder 1, and the operating air 10 is supplied or discharged from the space s2 on the other side. The operating air 10 in the space s2 is referred to as a closed operating air 11.
The piston 3 moves in the cylinder 1 by the elastic force of the spring 2 and the air pressure of the sealing operation air 11.
By supplying the sealing operation air 11 to the space s2 of the cylinder 1, the piston 3 and the piston rod 4 move to one side (Open) against the elastic force of the spring 2, and the main valve B is opened. .. On the other hand, when the sealing operation air 11 is discharged from the space s2 of the cylinder 1, the piston 3 and the piston rod 4 move to the other side (Close) due to the elastic force of the spring 2, and the main valve B is closed. Will be done.
　＜第１電磁弁ｄ１、第２電磁弁ｄ２＞
　三方弁の第１電磁弁ｄ１は、常時開口する開口部５ａ、信号の有無で開閉する開口部６ａ、信号の有無で閉開する閉口部７ａ、バネ部８ａ、ソレノイド部９ａを有している。
　ソレノイド部９ａは、常用電源で信号が供給(オン)される。
　開口部６ａは、ソレノイド部９ａへ信号が供給される(信号有)ことで開き、信号がオフされる(信号無)ことで閉じる。 <1st solenoid valve d1, 2nd solenoid valve d2>
The first solenoid valve d1 of the three-way valve has an opening 5a that always opens, an opening 6a that opens and closes depending on the presence or absence of a signal, a closing portion 7a that opens and closes depending on the presence or absence of a signal, a spring portion 8a, and a solenoid portion 9a. ..
A signal is supplied (on) to the solenoid unit 9a by a normal power supply.
The opening 6a opens when a signal is supplied to the solenoid unit 9a (with a signal), and closes when the signal is turned off (without a signal).
　開口部７ａは、ソレノイド部９ａへ信号が供給される(信号有)ことで閉じ、信号がオフされる(信号無)ことで開く。
　開口部５ａは、常時開口する。
　三方弁の第２電磁弁ｄ２は、常時閉塞する開口部５ｂ、常時開口する開口部６ｂ、信号の有無で閉開する開口部７ｂ、バネ部８ｂ、ソレノイド部９ｂを有している。
　ソレノイド部９ｂは、常用または非常用電源で信号が供給(オン)される。 The opening 7a is closed when a signal is supplied to the solenoid unit 9a (with a signal), and is opened when the signal is turned off (without a signal).
The opening 5a is always open.
The second solenoid valve d2 of the three-way valve has an opening 5b that is always closed, an opening 6b that is always open, an opening 7b that opens and closes depending on the presence or absence of a signal, a spring portion 8b, and a solenoid portion 9b.
A signal is supplied (on) to the solenoid unit 9b by a normal or emergency power supply.
　開口部５ｂは前記のように閉止板等を用いて常時閉塞する。
　開口部７ｂは、ソレノイド部９ｂへ信号が供給される(信号有)ことで開き、信号がオフされる(信号無)ことで閉じる。 The opening 5b is always closed by using a closing plate or the like as described above.
The opening 7b opens when a signal is supplied to the solenoid unit 9b (with a signal), and closes when the signal is turned off (without a signal).
　＜弁駆動部Ｋ１の動作＞
　弁駆動部Ｋ１は、操作空気１０が供給口１０ｉからシリンダー１のピストンロッド４側の空間ｓ２へ供給される。
　弁駆動部Ｋ１は、第１電磁弁ｄ１、第２電磁弁ｄ２の各励磁・無励磁で操作空気１０の流路を変更する。
　前記したように、操作空気１０を開口部６ａおよび開口部５ａを通じてシリンダー１の空間ｓ２に供給することによりシリンダー１のピストン３の位置を一方側(Open)に操作している。ピストン３が一方側(Open)に操作することで、主弁Ｂは開弁される。 <Operation of valve drive unit K1>
In the valve drive unit K1, the operating air 10 is supplied from the supply port 10i to the space s2 on the piston rod 4 side of the cylinder 1.
The valve drive unit K1 changes the flow path of the operating air 10 by each excitation / non-excitation of the first solenoid valve d1 and the second solenoid valve d2.
As described above, the position of the piston 3 of the cylinder 1 is operated to one side (Open) by supplying the operating air 10 to the space s2 of the cylinder 1 through the opening 6a and the opening 5a. By operating the piston 3 to one side (Open), the main valve B is opened.
　一方、操作空気１０を開口部５ａ、開口部７ａ、７ｂ、開口部６ｂを通じて排出口１０ｏから排出することにより、ピストン３の位置を他方側(Close)に操作している。ピストン３が他方側(Close)に操作することで、主弁Ｂは閉弁される。 On the other hand, the position of the piston 3 is operated to the other side (Close) by discharging the operating air 10 from the discharge port 10o through the openings 5a, the openings 7a and 7b, and the opening 6b. When the piston 3 operates to the other side (Close), the main valve B is closed.
　図１の実施形態１のシーケンスでは主弁Ｂを開状態の場合を示すが、主弁Ｂとの取り合い機構にて、本シーケンスで主弁Ｂを閉とすることができる。
　図２に、主弁Ｂの状態を維持する開閉状態維持(Ｆａｉｌ　ａｓ　ｉｓ)シーケンスを示す。 Although the sequence of the first embodiment of FIG. 1 shows the case where the main valve B is in the open state, the main valve B can be closed in this sequence by the connection mechanism with the main valve B.
FIG. 2 shows an open / closed state maintenance (Fail as is) sequence for maintaining the state of the main valve B.
　図３に、主弁Ｂが閉状態のシーケンスを示す。
　空気作動弁である主弁Ｂを駆動する弁駆動部Ｋ１は、主弁Ｂを「開」モード(図１参照)、「開閉状態維持(Ｆａｉｌ　ａｓ　ｉｓ)」モード(図２参照)、「閉」モード(図３参照)とするシーケンスをもつ。なお、「開」、「Ｆａｉｌ　ａｓ　ｉｓ」、「閉」の各モードの順番は任意である。 FIG. 3 shows a sequence in which the main valve B is in the closed state.
The valve drive unit K1 that drives the main valve B, which is an air-operated valve, opens the main valve B in an "open" mode (see FIG. 1), an "open / close state (Fail as is)" mode (see FIG. 2), and "closed". It has a sequence in which it is in a mode (see FIG. 3). The order of each mode of "open", "Fail as", and "closed" is arbitrary.
　＜主弁Ｂの「開」モード＞
　図１に示す主弁Ｂの「開」モードは、第１電磁弁ｄ１のソレノイド部９ａが「オン」、第２電磁弁ｄ２のソレノイド部９ｂが「オフ」で実現される。
　第１電磁弁ｄ１は、ソレノイド部９ａが常用電源で信号が「オン」すると、開口部６ａは「開」き、開口部７ａは「閉」じる。開口部５ａは常時開口している。
　また、第２電磁弁ｄ２は、ソレノイド部９ｂが常用または非常用電源で信号が「オフ」すると、開口部７ｂは「閉」じる。開口部５ｂは常時閉塞する。開口部６ｂは常時開口する。 <"Open" mode of main valve B>
The "open" mode of the main valve B shown in FIG. 1 is realized when the solenoid portion 9a of the first solenoid valve d1 is "on" and the solenoid portion 9b of the second solenoid valve d2 is "off".
In the first solenoid valve d1, when the solenoid portion 9a is a normal power source and the signal is "on", the opening 6a is "opened" and the opening 7a is "closed". The opening 5a is always open.
Further, in the second solenoid valve d2, when the solenoid portion 9b is a regular or emergency power source and the signal is "off", the opening portion 7b is "closed". The opening 5b is always closed. The opening 6b is always open.
　上記動作により、操作空気１０が供給口１０ｉから、第１電磁弁ｄ１の「開」の開口部６ａ、常時開口の開口部５ａを通ってシリンダー１の空間ｓ２に供給される(図１の矢印α１１)。これにより、主弁Ｂは全開となる。この際、第１電磁弁ｄ１の開口部７ａは「閉」なので、操作空気１０は通過できない。 By the above operation, the operating air 10 is supplied from the supply port 10i to the space s2 of the cylinder 1 through the "open" opening 6a of the first solenoid valve d1 and the opening 5a of the constant opening (arrow in FIG. 1). α11). As a result, the main valve B is fully opened. At this time, since the opening 7a of the first solenoid valve d1 is "closed", the operating air 10 cannot pass through.
　＜主弁Ｂの「開閉状態維持」モード＞
　図２に示す主弁Ｂの状態を維持する開閉状態維持(Ｆａｉｌ　ａｓ　ｉｓ)シーケンスは、シリンダー１の空間ｓ２に供給された密閉操作空気１１を、第１電磁弁ｄ１、第２電磁弁ｄ２の動作により留める。
　開閉状態維持シーケンスでは、電源の供給が途絶え、第１電磁弁ｄ１のソレノイド部９ａが「オフ」、第２電磁弁ｄ２のソレノイド部９ｂが「オフ」となる。 <Main valve B "maintain open / closed"mode>
In the open / closed state maintenance (Fail as is) sequence for maintaining the state of the main valve B shown in FIG. 2, the sealed operation air 11 supplied to the space s2 of the cylinder 1 is introduced to the first solenoid valve d1 and the second solenoid valve d2. Fasten by movement.
In the open / closed state maintenance sequence, the power supply is cut off, the solenoid portion 9a of the first solenoid valve d1 is “off”, and the solenoid portion 9b of the second solenoid valve d2 is “off”.
　第１電磁弁ｄ１のソレノイド部９ａが「オフ」した場合、開口部６ａは「閉」じ、開口部７ａは「開」く。開口部５ａは常時開口する。
　第２電磁弁ｄ２のソレノイド部９ｂが「オフ」した場合、開口部７ｂは「閉」じる。開口部５ｂは常時閉塞する。開口部６ｂは常時開口する。 When the solenoid portion 9a of the first solenoid valve d1 is "off", the opening 6a is "closed" and the opening 7a is "open". The opening 5a is always open.
When the solenoid portion 9b of the second solenoid valve d2 is "off", the opening 7b is "closed". The opening 5b is always closed. The opening 6b is always open.
　これにより、シリンダー１の空間ｓ２の操作空気１０は、第１電磁弁ｄ１の開口部５ａ、開口部７ａは通れるが、第２電磁弁ｄ２の「閉」の開口部７ｂは通れない。そのため、シリンダー１の空間ｓ２の密閉操作空気１１は、操作空気の供給口１０ｉと、操作空気の排出口１０ｏとに遮断された状態にある。この場合、供給される操作空気１０や、常用電源信号および非常用電源信号が無くなった場合でも、主弁Ｂの状態(開閉状態)を維持することができる。この時、シリンダー１内に密閉操作空気１１が滞留しているため、主弁Ｂは開状態を維持している。 As a result, the operating air 10 in the space s2 of the cylinder 1 can pass through the opening 5a and the opening 7a of the first solenoid valve d1, but cannot pass through the "closed" opening 7b of the second solenoid valve d2. Therefore, the sealed operating air 11 in the space s2 of the cylinder 1 is in a state of being cut off by the operating air supply port 10i and the operating air discharge port 10o. In this case, the state of the main valve B (open / closed state) can be maintained even when the supplied operating air 10, the normal power supply signal, and the emergency power supply signal are lost. At this time, since the sealing operation air 11 is retained in the cylinder 1, the main valve B is maintained in the open state.
　したがって、シリンダー１の空間ｓ２の密閉操作空気１１は、その状態が維持され、主弁Ｂはその時点の開閉状態が維持される。なお、主弁Ｂを閉状態に維持することも可能である。 Therefore, the sealed operating air 11 in the space s2 of the cylinder 1 is maintained in that state, and the main valve B is maintained in the open / closed state at that time. It is also possible to keep the main valve B in the closed state.
　＜主弁Ｂの「閉」モード＞
　図３に示す主弁Ｂの閉状態のシーケンスは以下のように動作する。
　主弁Ｂの「閉」モードは、図２の「開閉状態維持」シーケンスから、常用または非常用電源で第２電磁弁ｄ２のソレノイド部９ｂを操作し、シリンダー１内に供給した密閉操作空気１１を排出口１０ｏから排気し、バネ２の力でピストン３を元(Close)に戻す。これにより、主弁Ｂは閉状態となる。 <"Closed" mode of main valve B>
The sequence of the main valve B in the closed state shown in FIG. 3 operates as follows.
In the "closed" mode of the main valve B, the solenoid portion 9b of the second solenoid valve d2 is operated with a normal or emergency power source from the "maintenance of open / closed state" sequence of FIG. Is exhausted from the discharge port 10o, and the piston 3 is returned to its original state (Close) by the force of the spring 2. As a result, the main valve B is closed.
　主弁Ｂの閉状態のシーケンスは、第１電磁弁ｄ１が「オフ」、第２電磁弁ｄ１が「オン」で実現される。
　第１電磁弁ｄ１のソレノイド部９ａが常用電源で信号が「オフ」した場合、開口部６ａは「閉」じ、開口部７ａは「開」く。開口部５ａは常時開口している。
　第２電磁弁ｄ２は、ソレノイド部９ｂが常用または非常用電源で信号が「オン」すると、開口部７ｂは「開」き、開口部６ｂは常時開口する。開口部５ｂは常時閉塞する。、
　これにより、シリンダー１の空間ｓ２の密閉操作空気１１は、第１電磁弁ｄ１の常時開口の開口部５ａ、「開」の開口部７ａ、第２電磁弁ｄ２の「開」の開口部７ｂ、常時開口の開口部６ｂを通り、排出口１０ｏから排気される。 The sequence in the closed state of the main valve B is realized when the first solenoid valve d1 is "off" and the second solenoid valve d1 is "on".
When the solenoid portion 9a of the first solenoid valve d1 is a regular power source and the signal is "off", the opening 6a is "closed" and the opening 7a is "open". The opening 5a is always open.
In the second solenoid valve d2, when the solenoid portion 9b is a regular or emergency power source and the signal is "on", the opening 7b is "opened" and the opening 6b is always open. The opening 5b is always closed. ,
As a result, the sealing operation air 11 in the space s2 of the cylinder 1 has the opening 5a of the constant opening of the first solenoid valve d1, the opening 7a of the "open", and the opening 7b of the "open" of the second solenoid valve d2. It passes through the opening 6b of the constant opening and is exhausted from the discharge port 10o.
　したがって、シリンダー１の空間ｓ２の密閉操作空気１１が排出されるので、ピストン３がバネ２の押圧力で元(Close)に戻り、主弁Ｂは閉弁される。
　上記構成によれば、シンプルで信頼性の高いシーケンスを有するとともに、開閉状態維持(Ｆａｉｌ　ａｓ　ｉｓ)機能と非常用電源を用いて開閉状態維持状態から強制閉機能を備えた空気作動弁用の弁駆動部Ｋ１が提供できる。 Therefore, since the sealing operation air 11 in the space s2 of the cylinder 1 is discharged, the piston 3 returns to the original (Close) by the pressing force of the spring 2, and the main valve B is closed.
According to the above configuration, a valve for an air-operated valve having a simple and highly reliable sequence and having an open / closed state maintenance (Fail is) function and a forced closing function from the open / closed state maintenance state using an emergency power supply. The drive unit K1 can be provided.
　また、弁駆動部Ｋ１は、開閉状態維持モードから強制閉モードが可能なので、原子力発電所の隔離弁に適用できる。弁駆動部Ｋ１は隔離弁以外にも適用可能であり、例えば、常用の大容量電源を有していない等の理由により電動弁を採用できない弁に対しても、適用可能である。 Further, since the valve drive unit K1 can be forced to close from the open / closed state maintenance mode, it can be applied to the isolation valve of a nuclear power plant. The valve drive unit K1 can be applied to a valve other than the isolation valve, and is also applicable to a valve for which an electric valve cannot be adopted because it does not have a regular large-capacity power supply.
　＜＜実施形態２＞＞
　図４Ａに、本発明の実施形態２に係る弁駆動部Ｋ２のシーケンスの概略図を示す。図４Ｂに、図４Ａの状態から弁駆動部Ｋ２の第３電磁弁ｄ３の信号がオフした状態のシーケンスの概略図を示す。図４Ｃに、図４Ａの状態から弁駆動部Ｋ２の第１電磁弁ｄ１の信号がオフした状態のシーケンスの概略図を示す。 << Embodiment 2 >>
FIG. 4A shows a schematic diagram of the sequence of the valve drive unit K2 according to the second embodiment of the present invention. FIG. 4B shows a schematic diagram of a sequence in which the signal of the third solenoid valve d3 of the valve drive unit K2 is turned off from the state of FIG. 4A. FIG. 4C shows a schematic diagram of a sequence in which the signal of the first solenoid valve d1 of the valve drive unit K2 is turned off from the state of FIG. 4A.
　図４Ａに示す実施形態２の弁駆動部Ｋ２は、主弁(空気作動弁)Ｂを開弁させることの信頼性を向上させた機構である。換言すれば、弁駆動部Ｋ２は、シリンダー１に操作空気１０を供給し続けることの信頼性を向上させた機構である。
　弁駆動部Ｋ２は、実施形態１の弁駆動部Ｋ１に三方弁の第３電磁弁ｄ３を加えた構成をもつ。その他の構成は、実施形態１と同様であるから同様な構成要素には同一の符号を付して示し、詳細な説明は省略する。 The valve drive unit K2 of the second embodiment shown in FIG. 4A is a mechanism for improving the reliability of opening the main valve (air operated valve) B. In other words, the valve drive unit K2 is a mechanism that improves the reliability of continuously supplying the operating air 10 to the cylinder 1.
The valve drive unit K2 has a configuration in which the third solenoid valve d3 of the three-way valve is added to the valve drive unit K1 of the first embodiment. Since the other configurations are the same as those in the first embodiment, the same components are designated by the same reference numerals, and detailed description thereof will be omitted.
　弁駆動部Ｋ２のシーケンスは、実施形態１の弁駆動部Ｋ１に操作空気１０をシリンダー１内に供給するための第３電磁弁ｄ３を加える。そのため、弁駆動部Ｋ２は、第１電磁弁ｄ１または第３電磁弁ｄ３のどちらかが故障した場合でもシリンダー１内に操作空気１０を送り続けることができる。
　第３電磁弁ｄ３は、常時開口する開口部５ｃ、信号の有無で開閉する開口部６ｃ、信号の有無で閉開する閉口部７ｃ、バネ部８ｃ、ソレノイド部９ｃを有している。 In the sequence of the valve drive unit K2, a third solenoid valve d3 for supplying the operating air 10 into the cylinder 1 is added to the valve drive unit K1 of the first embodiment. Therefore, the valve drive unit K2 can continue to send the operating air 10 into the cylinder 1 even if either the first solenoid valve d1 or the third solenoid valve d3 fails.
The third solenoid valve d3 has an opening 5c that always opens, an opening 6c that opens and closes depending on the presence or absence of a signal, a closing portion 7c that opens and closes depending on the presence or absence of a signal, a spring portion 8c, and a solenoid portion 9c.
　第３電磁弁ｄ３のソレノイド部９ｃは、常用電源で信号が供給される。
　開口部６ｃは、ソレノイド部９ｃへ信号が供給される(信号有)ことで開き、信号がオフされる(信号無)ことで閉じる。
　開口部７ｃは、ソレノイド部９ｃへ信号が供給される(信号有)ことで閉じ、信号がオフされる(信号無)ことで開く。
　開口部５ｃは、前記のように常時開口している。 A signal is supplied to the solenoid portion 9c of the third solenoid valve d3 by a regular power supply.
The opening 6c opens when a signal is supplied to the solenoid unit 9c (with a signal), and closes when the signal is turned off (without a signal).
The opening 7c is closed when a signal is supplied to the solenoid unit 9c (with a signal), and is opened when the signal is turned off (without a signal).
The opening 5c is always open as described above.
　図４Ａに示す主弁Ｂを開弁するシーケンスでは、第１電磁弁ｄ１は常用電源によりソレノイド部９ａの信号がオン、第３電磁弁ｄ３は常用電源によりソレノイド部９ｃの信号がオン、第２電磁弁ｄ２は常用または非常用電源によりソレノイド部９ｂの信号がオフと制御される。
　第１電磁弁ｄ１は、ソレノイド部９ａの信号がオンにより、開口部６ａは開き、開口部７ａは閉じる。開口部５ａは常時開口している。
　第３電磁弁ｄ３は、ソレノイド部９ｃの信号がオンにより、開口部６ｃは開き、開口部７ｃは閉じる。開口部５ｃは常時開口している。 In the sequence of opening the main valve B shown in FIG. 4A, the signal of the solenoid section 9a is turned on by the normal power supply for the first solenoid valve d1, the signal of the solenoid section 9c is turned on by the normal power supply for the third solenoid valve d3, and the second solenoid valve d3 is turned on. The solenoid valve d2 is controlled to turn off the signal of the solenoid unit 9b by a normal or emergency power supply.
In the first solenoid valve d1, the opening 6a is opened and the opening 7a is closed when the signal of the solenoid portion 9a is turned on. The opening 5a is always open.
In the third solenoid valve d3, the opening 6c is opened and the opening 7c is closed when the signal of the solenoid portion 9c is turned on. The opening 5c is always open.
　第２電磁弁ｄ２は、ソレノイド部９ｂの信号がオフにより、開口部７ｂは閉じる。開口部５ｂは常時閉口し、開口部６ｂは常時開口している。
　上述の開閉状態により、操作空気１０が供給口１０ｉから、第１電磁弁ｄ１の「開」の開口部６ａ、常時開口の開口部５ａを通ってシリンダー１の空間ｓ２に供給される(図４Ａの矢印α２１)。これにより、ピストン３がバネ２の弾性力に抗して一方側(Open)に操作され、主弁Ｂは開弁される。 The opening 7b of the second solenoid valve d2 is closed when the signal of the solenoid portion 9b is turned off. The opening 5b is always closed, and the opening 6b is always open.
Due to the above-mentioned open / closed state, the operating air 10 is supplied from the supply port 10i to the space s2 of the cylinder 1 through the “open” opening 6a of the first solenoid valve d1 and the constantly open opening 5a (FIG. 4A). Arrow α21). As a result, the piston 3 is operated to one side (Open) against the elastic force of the spring 2, and the main valve B is opened.
　なお、操作空気１０は供給口１０ｉから、第１電磁弁ｄ１の「開」の開口部６ｃ、常時開口の開口部５ｃを通る(図４Ａの矢印α２２)が、第１電磁弁ｄ１の開口部７ａは閉じているので通れない。 The operating air 10 passes through the “open” opening 6c of the first solenoid valve d1 and the opening 5c of the constant opening (arrow α22 in FIG. 4A) from the supply port 10i, but the opening of the first solenoid valve d1. 7a is closed and cannot pass through.
　図４Ａの状態から、図４Ｂに示すように、第３電磁弁ｄ３のソレノイド部９ｃの常用電源の信号が故障で遮断(オフ)された場合、第３電磁弁ｄ３の開口部６ｃは閉じ、開口部７ｃは開く。この場合、操作空気１０は供給口１０ｉから、第１電磁弁ｄ１の「開」の開口部６ａ、常時開口の開口部５ａを通ってシリンダー１のピストンロッド４がある空間ｓ２に供給される(図４Ｂの矢印α２２)ので、主弁Ｂは開弁を継続できる。 From the state of FIG. 4A, as shown in FIG. 4B, when the signal of the normal power supply of the solenoid portion 9c of the third solenoid valve d3 is cut off (off) due to a failure, the opening 6c of the third solenoid valve d3 is closed. The opening 7c opens. In this case, the operating air 10 is supplied from the supply port 10i to the space s2 where the piston rod 4 of the cylinder 1 is located through the "open" opening 6a of the first solenoid valve d1 and the opening 5a of the constant opening. Since the arrow α22) in FIG. 4B, the main valve B can continue to open.
　また、図４Ａの状態から、図４Ｃに示すように、第１電磁弁ｄ１のソレノイド部９ａの常用電源の信号が故障で遮断(オフ)された場合、第１電磁弁ｄ１の開口部６ａは閉じ、開口部７ａは開く。この場合、操作空気１０は、供給口１０ｉから第３電磁弁ｄ３の「開」の開口部６ｃ、常時開口の開口部５ｃ、第１電磁弁ｄ１の「開」の開口部７ａ、常時開口の開口部５ａを通ってシリンダー１の空間ｓ２に供給される(図４Ｃの矢印α２３)ので、主弁Ｂは開弁を継続できる。 Further, from the state of FIG. 4A, as shown in FIG. 4C, when the signal of the normal power supply of the solenoid portion 9a of the first solenoid valve d1 is cut off (off) due to a failure, the opening 6a of the first solenoid valve d1 is opened. It closes and the opening 7a opens. In this case, the operating air 10 has an opening 6c of the third solenoid valve d3 "open", an opening 5c of the constant opening, an opening 7a of the "open" of the first solenoid valve d1, and a constant opening from the supply port 10i. Since the main valve B is supplied to the space s2 of the cylinder 1 through the opening 5a (arrow α23 in FIG. 4C), the main valve B can continue to open.
　上記構成により、第１電磁弁ｄ１及び第３電磁弁ｄ３の両方が故障しない限り、第１電磁弁ｄ１または第３電磁弁ｄ３によりピストン３を密閉操作空気１１が押し上げ続ける。そのため、主弁Ｂの開作動の信頼性の向上が図れる。
　したがって、弁駆動部Ｋ２で駆動される主弁Ｂは、例えば、原子力発電所の主蒸気隔離弁のような開作動の信頼性が求められる弁に適したシーケンスとなっている。 With the above configuration, unless both the first solenoid valve d1 and the third solenoid valve d3 fail, the sealing operation air 11 continues to push up the piston 3 by the first solenoid valve d1 or the third solenoid valve d3. Therefore, the reliability of the opening operation of the main valve B can be improved.
Therefore, the main valve B driven by the valve drive unit K2 has a sequence suitable for a valve that requires reliability of open operation, such as a main steam isolation valve of a nuclear power plant.
＜＜実施形態３＞＞
　図５に、本発明の実施形態３に係る弁駆動部Ｋ３のサーベランスモードのシーケンスの概略図を示す。
　例えば、原子力発電所の主蒸気隔離弁のような弁は、主弁(空気作動弁)Ｂを開状態から弁体が固着して動かなくなっていないか(確実に動くか否か)確認するモードが必要となる。このモードは、サーベランスモードと称される。 << Embodiment 3 >>
FIG. 5 shows a schematic diagram of the surveillance mode sequence of the valve drive unit K3 according to the third embodiment of the present invention.
For example, in a valve such as the main steam isolation valve of a nuclear power plant, a mode for checking whether the valve body is stuck and stuck (whether it works reliably) from the open state of the main valve (air operated valve) B. Is required. This mode is referred to as surveillance mode.
　実施形態３の弁駆動部Ｋ３は、主弁Ｂのサーベランスモードを有する弁駆動機構である。
　弁駆動部Ｋ３は、実施形態１の弁駆動部Ｋ１に、三方弁の第４電磁弁ｄ４とスピードコントローラ１２とテスト用の操作空気１０の排出口１０ｔを設けている。
　その他の構成は、実施形態１と同様であるから、同一の構成要素には同一の符号を付して示し、詳細な説明は省略する。 The valve drive unit K3 of the third embodiment is a valve drive mechanism having a surveillance mode of the main valve B.
The valve drive unit K3 is provided with a third solenoid valve d4 of a three-way valve, a speed controller 12, and a discharge port 10t of operating air 10 for testing in the valve drive unit K1 of the first embodiment.
Since the other configurations are the same as those in the first embodiment, the same components are designated by the same reference numerals, and detailed description thereof will be omitted.
　第４電磁弁ｄ４は、常時開口する開口部５ｄ、信号の有無で開閉する開口部６ｄ、信号の有無で閉開する閉口部７ｄ、バネ部８ｄ、ソレノイド部９ｄを有している。
　第４電磁弁ｄ４の開口部６ｄには管路ｋ１の一方端が接続され、管路ｋ１の他方端には、テスト用の操作空気１０のテスト排出口１０ｔが設けられる。
　管路ｋ１のテスト排出口１０ｔの上流には、空気流の流量を絞ることができるスピードコントローラ１２が設けられている。 The fourth solenoid valve d4 has an opening 5d that always opens, an opening 6d that opens and closes depending on the presence or absence of a signal, a closing portion 7d that opens and closes depending on the presence or absence of a signal, a spring portion 8d, and a solenoid portion 9d.
One end of the pipeline k1 is connected to the opening 6d of the fourth solenoid valve d4, and a test discharge port 10t of the operating air 10 for testing is provided at the other end of the pipeline k1.
A speed controller 12 capable of reducing the flow rate of the air flow is provided upstream of the test discharge port 10t of the pipeline k1.
　第４電磁弁ｄ４のソレノイド部９ｄは、常用電源で信号が供給される。
　第４電磁弁ｄ４は、ソレノイド部９ｄの信号がオンにより、開口部６ｄは開き、開口部７ｄは閉じる。開口部５ｄは常時開口している。
　詳細には、開口部６ｄは、ソレノイド部９ｄ信号が供給される(信号有)ことで開き、ソレノイド部９ｄへの信号がオフされる(信号無)ことで閉じる。
　開口部７ｄは、ソレノイド部９ｄへ信号が供給される(信号有)ことで閉じ、ソレノイド部９ｄへの信号がオフされる(信号無)ことで開く。 A signal is supplied to the solenoid portion 9d of the fourth solenoid valve d4 by a regular power supply.
In the fourth solenoid valve d4, the opening 6d is opened and the opening 7d is closed when the signal of the solenoid portion 9d is turned on. The opening 5d is always open.
Specifically, the opening 6d opens when the solenoid unit 9d signal is supplied (with a signal), and closes when the signal to the solenoid unit 9d is turned off (without a signal).
The opening 7d is closed when a signal is supplied to the solenoid unit 9d (with a signal), and is opened when the signal to the solenoid unit 9d is turned off (without a signal).
　開口部５ｄは、常時開口している。
　弁駆動部Ｋ３のサーベランスモードは、サーベランス試験の運転時であり、主弁Ｂが全開から中間開度に緩やかに閉じられるモードである。
　主弁Ｂが全開に際しては、弁駆動部Ｋ３の第１電磁弁ｄ１は信号オン、第２電磁弁ｄ２は信号オフ、第４電磁弁ｄ４は信号オフである。主弁Ｂが全開からサーベランスモードに移行すると、主弁Ｂが中間開度に移行するため、弁駆動部Ｋ３の第１電磁弁ｄ１は信号オフ、第２電磁弁ｄ２は信号オフ、第４電磁弁ｄ４は信号オンとされる。 The opening 5d is always open.
The surveillance mode of the valve drive unit K3 is during the operation of the surveillance test, and is a mode in which the main valve B is gently closed from the fully open position to the intermediate opening degree.
When the main valve B is fully opened, the first solenoid valve d1 of the valve drive unit K3 has a signal on, the second solenoid valve d2 has a signal off, and the fourth solenoid valve d4 has a signal off. When the main valve B shifts from fully open to the surveillance mode, the main valve B shifts to the intermediate opening, so that the first solenoid valve d1 of the valve drive unit K3 has a signal off, the second solenoid valve d2 has a signal off, and the fourth solenoid valve has a signal off. The valve d4 is signal-on.
　第１電磁弁ｄ１は、ソレノイド部９ａの信号がオフにより、開口部６ａは閉じ、開口部７ａは開く。開口部５ａは常時開口している。
　第２電磁弁ｄ２は、ソレノイド部９ｂの信号がオフにより、開口部７ｂは閉じる。開口部６ｂは常時開口している。開口部５ｂは常時閉口している。
　第４電磁弁ｄ４は、ソレノイド部９ｄの信号がオンにより、開口部６ｄは開き、開口部７ｄは閉じる。開口部５ｄは常時開口している。 In the first solenoid valve d1, the opening 6a is closed and the opening 7a is opened when the signal of the solenoid portion 9a is turned off. The opening 5a is always open.
The opening 7b of the second solenoid valve d2 is closed when the signal of the solenoid portion 9b is turned off. The opening 6b is always open. The opening 5b is always closed.
In the fourth solenoid valve d4, the opening 6d is opened and the opening 7d is closed when the signal of the solenoid portion 9d is turned on. The opening 5d is always open.
　これにより、シリンダー１の空間ｓ２の密閉操作空気１１は、第１電磁弁ｄ１の常時開口の開口部５ａ、「開」の開口部７ａおよび第４電磁弁ｄ４の常時開口の開口部５ｄ、「開」の開口部６ｄを通り(図５の矢印α３１)、管路ｋ１のスピードコントローラ１２で流量が絞られ(例えば、排気量が１０％絞られ)、テスト排出口１０ｔから排出される。 As a result, the sealing operation air 11 in the space s2 of the cylinder 1 has the opening 5a of the constant opening of the first solenoid valve d1, the opening 7a of the "open" and the opening 5d of the constant opening of the fourth solenoid valve d4. Through the opening 6d of "open" (arrow α31 in FIG. 5), the flow rate is throttled by the speed controller 12 of the pipeline k1 (for example, the displacement is throttled by 10%), and the flow rate is discharged from the test discharge port 10t.
　こうして、弁駆動部Ｋ３をサーベランスモードにして、スピードコントローラ１２を用いて、シリンダー１内の密閉操作空気１１の排気量を絞ることにより、主弁Ｂの開度をコントロールすることができる。 In this way, the opening degree of the main valve B can be controlled by setting the valve drive unit K3 to the surveillance mode and using the speed controller 12 to reduce the displacement of the sealing operation air 11 in the cylinder 1.
＜＜実施形態４＞＞
　図６に、本発明の実施形態４に係る弁駆動部Ｋ４のサーベランスモードのシーケンスの概略図を示す。
　実施形態４の弁駆動部Ｋ４は、実施形態２と実施形態３を組み合わせることによって、主弁Ｂの開作動の信頼性を向上させ、かつサーベランスモードを備えたシーケンスである。
　弁駆動部Ｋ４は、実施形態２の弁駆動部Ｋ２の第２電磁弁ｄ２と第３電磁弁ｄ３との間に、実施形態３で説明した第４電磁弁ｄ４と、テスト排出口１０ｔとスピードコントローラ１２とをもつ管路ｋ１とを設けている。 << Embodiment 4 >>
FIG. 6 shows a schematic diagram of the surveillance mode sequence of the valve drive unit K4 according to the fourth embodiment of the present invention.
The valve drive unit K4 of the fourth embodiment is a sequence in which the reliability of the opening operation of the main valve B is improved by combining the second embodiment and the third embodiment, and the surveillance mode is provided.
The valve drive unit K4 has a fourth solenoid valve d4 described in the third embodiment, a test discharge port 10t, and a speed between the second solenoid valve d2 and the third solenoid valve d3 of the valve drive unit K2 of the second embodiment. A pipeline k1 having a controller 12 is provided.
　その他の構成は、実施形態２と実施形態３と同様であるから同様な構成には同一の符号を付して示し詳細な説明は省略する。
　弁駆動部Ｋ４のサーベランスモードは、サーベランス試験の運転時であり、主弁Ｂが全開から中間開度(例えば９０％開度)に緩やかに閉じられるモードである。
　主弁Ｂが全開時、弁駆動部Ｋ４の第１電磁弁ｄ１は信号オン、第２電磁弁ｄ２は信号オフ、第３電磁弁ｄ３は信号オン、第４電磁弁ｄ４は信号オフである。主弁Ｂが中間開度に移行するサーベランスモードでは、第１電磁弁ｄ１は信号オフ、第２電磁弁ｄ２は信号オフ、第３電磁弁ｄ３は信号オフ、第４電磁弁ｄ４は信号オンとされる。 Since the other configurations are the same as those in the second and third embodiments, the same configurations are designated by the same reference numerals and detailed description thereof will be omitted.
The surveillance mode of the valve drive unit K4 is during the operation of the surveillance test, and is a mode in which the main valve B is gently closed from the fully open position to the intermediate opening degree (for example, 90% opening degree).
When the main valve B is fully open, the first solenoid valve d1 of the valve drive unit K4 has a signal on, the second solenoid valve d2 has a signal off, the third solenoid valve d3 has a signal on, and the fourth solenoid valve d4 has a signal off. In the surveillance mode in which the main valve B shifts to the intermediate opening, the first solenoid valve d1 has a signal off, the second solenoid valve d2 has a signal off, the third solenoid valve d3 has a signal off, and the fourth solenoid valve d4 has a signal on. Will be done.
　サーベランス試験の運転時には、第１電磁弁ｄ１は、ソレノイド部９ａの信号がオフにより、開口部６ａは閉じ、開口部７ａは開く。開口部５ａは常時開口している。
　第２電磁弁ｄ２は、ソレノイド部９ｂの信号がオフにより、開口部６ｂは開き、開口部７ｂは閉じる。開口部５ｂは常時閉口している。
　第３電磁弁ｄ３は、ソレノイド部９ｃの信号がオフにより、開口部６ｃは閉じ、開口部７ｃは開く。開口部５ｃは常時開口している。 During the operation of the surveillance test, the opening 6a of the first solenoid valve d1 is closed and the opening 7a is opened due to the signal of the solenoid portion 9a being turned off. The opening 5a is always open.
In the second solenoid valve d2, the opening 6b is opened and the opening 7b is closed when the signal of the solenoid portion 9b is turned off. The opening 5b is always closed.
In the third solenoid valve d3, the opening 6c is closed and the opening 7c is opened when the signal of the solenoid portion 9c is turned off. The opening 5c is always open.
　第４電磁弁ｄ４は、ソレノイド部９ｄの信号がオンにより、開口部６ｄは開き、開口部７ｄは閉じる。開口部５ｄは常時開口している。
　これにより、シリンダー１の空間ｓ２にある密閉操作空気１１は、第１電磁弁ｄ１の常時開口の開口部５ａ、「開」の開口部７ａおよび第３電磁弁ｄ３の常時開口の開口部５ｃ、「開」の開口部７ｃおよび第４電磁弁ｄ４の常時開口の開口部５ｄ、「開」の開口部６ｄを通り(図６の矢印α４１)、管路ｋ１のスピードコントローラ１２で流量が絞られ(例えば、排気量が１０％絞られ)、テスト排出口１０ｔから排出される。 In the fourth solenoid valve d4, the opening 6d is opened and the opening 7d is closed when the signal of the solenoid portion 9d is turned on. The opening 5d is always open.
As a result, the sealing operation air 11 in the space s2 of the cylinder 1 has the opening 5a of the constant opening of the first solenoid valve d1, the opening 7a of the "open" and the opening 5c of the constant opening of the third solenoid valve d3. The flow rate is throttled by the speed controller 12 of the pipeline k1 through the opening 7c of the "open", the opening 5d of the constant opening of the fourth solenoid valve d4, and the opening 6d of the "open" (arrow α41 in FIG. 6). (For example, the displacement is reduced by 10%), and the test discharge port 10t is discharged.
　こうして、弁駆動部Ｋ４をサーベランスモードにして、シリンダー１内の密閉操作空気１１の排気量を、スピードコントローラ１２を用いて絞ることにより、主弁Ｂの開度をコントロールすることができる。 In this way, the opening degree of the main valve B can be controlled by setting the valve drive unit K4 to the surveillance mode and reducing the displacement of the sealed operation air 11 in the cylinder 1 by using the speed controller 12.
　また、弁駆動部Ｋ４は、第１電磁弁ｄ１及び第３電磁弁ｄ３の両方が故障しない限り、第１電磁弁ｄ１または第３電磁弁ｄ３によりピストン３を操作空気１０が押し上げ続けることができる。そのため、主弁Ｂの開作動の信頼性の向上が図れる。
　したがって、弁駆動部Ｋ４で駆動される主弁Ｂは、例えば、原子力発電所の主蒸気隔離弁のような開作動の信頼性が求められる弁に適したシーケンスとなっている。 Further, in the valve drive unit K4, the operating air 10 can continue to push up the piston 3 by the first solenoid valve d1 or the third solenoid valve d3 as long as both the first solenoid valve d1 and the third solenoid valve d3 do not fail. .. Therefore, the reliability of the opening operation of the main valve B can be improved.
Therefore, the main valve B driven by the valve drive unit K4 has a sequence suitable for a valve that requires reliability of open operation, such as a main steam isolation valve of a nuclear power plant.
＜＜実施形態５＞＞
　図７に、本発明の実施形態５に係る弁駆動部Ｋ５の開モードのシーケンスの概略図を示す。
　実施形態５の弁駆動部Ｋ５は、実施形態４の弁駆動部Ｋ４に爆破弁１３を併設して開閉状態維持機能(Ｆａｉｌ　ａｓ　ｉｓ機能)の解除に多重性を持たせた構成である。
　弁駆動部Ｋ５は、実施形態４の弁駆動部Ｋ４(図６参照)において第２電磁弁ｄ２と排出口１０ｏに代えて非常用電源で制御される三方弁の第５電磁弁ｄ５と排出口１０ｏ１を設け、かつ第５電磁弁ｄ５の下流に爆破弁１３を設けている。 << Embodiment 5 >>
FIG. 7 shows a schematic diagram of an open mode sequence of the valve drive unit K5 according to the fifth embodiment of the present invention.
The valve drive unit K5 of the fifth embodiment has a configuration in which a blast valve 13 is provided side by side with the valve drive unit K4 of the fourth embodiment to have multiple functions for releasing the open / closed state maintaining function (Fail as is function).
The valve drive unit K5 is the valve drive unit K4 (see FIG. 6) of the fourth embodiment, and instead of the second solenoid valve d2 and the discharge port 10o, the valve drive unit K5 is a three-way valve fifth solenoid valve d5 and a discharge port controlled by an emergency power supply. 10o1 is provided, and a blast valve 13 is provided downstream of the fifth solenoid valve d5.
　その他の構成は、実施形態４と同様であるから同様な構成には同一の符号を付して示し詳細な説明は省略する。
　爆破弁１３は非常用電源で制御されるブースター９ｆに制御される。爆破弁１３は、ブースター９ｆからの電流信号オフで閉状態にあり、ブースター９ｆからの電流信号が供給されて爆破され開状態となる。
　三方弁の第５電磁弁ｄ５は、常時開口する開口部５ｅ、信号の有無で開閉する開口部６ｅ、信号の有無で閉開する閉口部７ｅ、バネ部８ｅ、ソレノイド部９ｅを有している。 Since the other configurations are the same as those in the fourth embodiment, the same configurations are designated by the same reference numerals and detailed description thereof will be omitted.
The blast valve 13 is controlled by a booster 9f controlled by an emergency power supply. The blast valve 13 is in a closed state when the current signal from the booster 9f is turned off, and the current signal from the booster 9f is supplied to blast and open the blast valve 13.
The fifth solenoid valve d5 of the three-way valve has an opening 5e that always opens, an opening 6e that opens and closes depending on the presence or absence of a signal, a closing portion 7e that opens and closes depending on the presence or absence of a signal, a spring portion 8e, and a solenoid portion 9e. ..
　第５電磁弁ｄ５のソレノイド部９ｅは、非常用電源で信号が供給される。
　開口部６ｅは、ソレノイド部９ｅ信号が供給される(信号有)ことで開き、信号がオフ (信号無)で閉じる。
　開口部７ｅは、ソレノイド部９ｅへ信号が供給される(信号有)ことで閉じ、信号がオフ (信号無)で開く。
　開口部５ｅは、常時開口している。 A signal is supplied to the solenoid portion 9e of the fifth solenoid valve d5 by an emergency power supply.
The opening 6e opens when the solenoid unit 9e signal is supplied (with signal), and closes when the signal is off (without signal).
The opening 7e is closed when a signal is supplied to the solenoid unit 9e (with a signal), and is opened when the signal is off (without a signal).
The opening 5e is always open.
　第５電磁弁ｄ５は、ソレノイド部９ｅの信号がオンにより、開口部６ｅは開き、開口部７ｅは閉じる。開口部５ｅは常時開口している。
　図７には、開閉状態維持機能(Ｆａｉｌ　ａｓ　ｉｓ機能)での主弁Ｂの全開維持状態を示している。
　主弁Ｂは、図７の開閉状態維持機能の動作前は、開状態にあり、第１電磁弁ｄ１、第３電磁弁ｄ３は信号オンで操作空気１０が供給口１０ｉから開口部６ａ、５ａを通ってシリンダー１の空間ｓ２に供給されている。この際、第４電磁弁ｄ４、第５電磁弁ｄ５、爆破弁１３は信号オフである。 In the fifth solenoid valve d5, the opening 6e is opened and the opening 7e is closed when the signal of the solenoid portion 9e is turned on. The opening 5e is always open.
FIG. 7 shows a fully open maintenance state of the main valve B in the open / closed state maintenance function (Fail as is function).
The main valve B is in the open state before the operation of the open / closed state maintaining function of FIG. 7, the first solenoid valve d1 and the third solenoid valve d3 are signal-on, and the operating air 10 is opened from the supply port 10i to the openings 6a and 5a. It is supplied to the space s2 of the cylinder 1 through the space s2. At this time, the signals of the fourth solenoid valve d4, the fifth solenoid valve d5, and the blast valve 13 are off.
　図７に示す開閉状態維持機能(Ｆａｉｌ　ａｓ　ｉｓ機能)に至ると、異常時なので第１電磁弁ｄ１、第３電磁弁ｄ３、第４電磁弁ｄ４、第５電磁弁ｄ５は信号オフとなる。
　この場合、シリンダー１の空間ｓ２は、第１電磁弁ｄ１の開口部５ａ、７ａ、第３電磁弁ｄ３の開口部５ｃ、７ｃ、第４電磁弁ｄ４の開口部５ｄ、７ｄ、第５電磁弁ｄ５の開口部５ｅ、７ｅに通じている (図７の矢印α５１)。しかし、爆破弁１３は閉状態なので、シリンダー１の空間ｓ２の密閉操作空気１１は爆破弁１３から排出されない。そのため、図７に示す開閉状態維持機能で主弁Ｂは「開」状態を維持している。 When the open / closed state maintaining function (Fail is function) shown in FIG. 7 is reached, the first solenoid valve d1, the third solenoid valve d3, the fourth solenoid valve d4, and the fifth solenoid valve d5 are turned off because of an abnormal condition.
In this case, the space s2 of the cylinder 1 is the openings 5a and 7a of the first solenoid valve d1, the openings 5c and 7c of the third solenoid valve d3, the openings 5d and 7d of the fourth solenoid valve d4, and the fifth solenoid valve. It leads to the openings 5e and 7e of d5 (arrow α51 in FIG. 7). However, since the blast valve 13 is in the closed state, the sealing operation air 11 in the space s2 of the cylinder 1 is not discharged from the blast valve 13. Therefore, the main valve B maintains the "open" state by the open / closed state maintaining function shown in FIG. 7.
　主弁Ｂを開閉状態維持機能の「開」状態から「閉」状態にするには、第５電磁弁ｄ５を非常用電源で信号オンとし、開口部６ｅを開き、シリンダー１の空間ｓの密閉操作空気１１を排出口１０ｏ１から排出する。第５電磁弁ｄ５が作動しない場合、爆破弁１３のソレノイド部９ｆを非常用電源でオンとし、爆破弁１３を爆破して「開」状態とし、爆破弁１３から排気する。
　したがって、弁駆動部Ｋ５は、第５電磁弁ｄ５と爆破弁１３の両方が故障しない限り、第５電磁弁ｄ５または爆破弁１３で、図７に示す開閉状態維持機能(Ｆａｉｌ　ａｓ　ｉｓ機能)の主弁Ｂの「開」状態から「閉」状態にすることが可能である。 To change the main valve B from the "open" state to the "closed" state of the open / closed state maintenance function, turn on the signal of the fifth solenoid valve d5 with an emergency power supply, open the opening 6e, and seal the space s of the cylinder 1. The operating air 11 is discharged from the discharge port 10o1. When the fifth solenoid valve d5 does not operate, the solenoid portion 9f of the blast valve 13 is turned on by an emergency power source, the blast valve 13 is blasted to the "open" state, and the exhaust is exhausted from the blast valve 13.
Therefore, unless both the fifth solenoid valve d5 and the blast valve 13 fail, the valve drive unit K5 is the fifth solenoid valve d5 or the blast valve 13 and has the open / closed state maintaining function (Fail is function) shown in FIG. It is possible to change the main valve B from the "open" state to the "closed" state.
　第４電磁弁ｄ４、スピードコントローラ１２を用いるので、サーベランスモードが可能である。
　弁駆動部Ｋ５の構成によれば、開閉状態維持機能(Ｆａｉｌ　ａｓ　ｉｓ機能)の解除に多重性を持たせ、開閉状態維持機能の解除の信頼性を向上させたシーケンスが得られる。 Since the fourth solenoid valve d4 and the speed controller 12 are used, the surveillance mode is possible.
According to the configuration of the valve drive unit K5, it is possible to obtain a sequence in which the opening / closing state maintaining function (Fail is function) is released with multiplex, and the reliability of releasing the opening / closing state maintaining function is improved.
＜＜その他の実施形態＞＞
１．前記実施形態では、切替機能として、電磁弁を例にあげて説明したが、切替機能をもてば、モータ駆動の電動弁、爆破弁、電磁弁を使用する切替弁等の電磁弁以外の切替手段を用いてもよい。 << Other Embodiments >>
1. 1. In the above-described embodiment, the solenoid valve has been described as an example as the switching function, but if the switching function is provided, switching other than the solenoid valve such as a motor-driven electric valve, a blast valve, and a switching valve using a solenoid valve is used. Means may be used.
２．弁駆動部(空気作動弁の駆動機構)Ｋ１～Ｋ５に対して、常用電源、非常用電源を電源の例として挙げたが、プラント設備用電源である常用電源、非常用電源、計装用電源を組み合わせて、電源を供給することができる。これにより、より信頼性・運用性が高い設備とすることが可能になる。 2. 2. For the valve drive unit (air-operated valve drive mechanism) K1 to K5, the normal power supply and the emergency power supply are given as examples of the power supply. It can be combined to supply power. This makes it possible to make the equipment more reliable and operable.
３．前記実施形態では、様々な構成を説明したが、各構成を適宜選択して組み合わせて構成してもよい。 3. 3. In the above-described embodiment, various configurations have been described, but each configuration may be appropriately selected and combined.
４．前記実施形態で説明した構成は１例であり、特許請求の範囲内で様々な形態が可能である。 4. The configuration described in the above embodiment is an example, and various forms are possible within the scope of the claims.
　１　　　シリンダー(開閉状態維持手段)
　２　　　バネ(弾性体、開閉状態維持手段)
　３　　　ピストン(開閉状態維持手段)
　４　　　ピストンロッド(ピストン)
　１０　　操作空気
　１０ｉ　供給口
　１１　　密閉操作空気(シリンダ内の操作空気)
　１２　　スピードコントローラ(流量調整手段)
　１３　　爆破弁(切替機能を持った機器、第２閉状態切替手段)
　ｄ１　　電磁弁(開閉状態維持手段、供給手段、第１電磁弁、切替機能を持った機器)
　ｄ２　　電磁弁(開閉状態維持手段、切替手段、第１閉状態切替手段、第２電磁弁、切替機能を持った機器)
　ｄ３　　電磁弁(供給手段、切替機能を持った機器)
　ｄ４　　電磁弁(サーベランス排出手段、切替機能を持った機器)
　ｄ５　　電磁弁(第１閉状態切替手段、切替機能を持った機器)
　Ｂ　　　主弁(空気作動弁)
　Ｋ１、Ｋ２、Ｋ３、Ｋ４、Ｋ５　弁駆動部(空気作動弁の駆動機構) 1 cylinder (means for maintaining open / closed state)
2 Spring (elastic body, means for maintaining open / closed state)
3 Piston (means for maintaining open / closed state)
4 Piston rod (piston)
10 Operation air 10i Supply port 11 Sealed operation air (operation air in the cylinder)
12 Speed controller (flow rate adjusting means)
13 Explosion valve (equipment with switching function, second closed state switching means)
d1 Solenoid valve (open / closed state maintaining means, supply means, first solenoid valve, device with switching function)
d2 Solenoid valve (open / close state maintaining means, switching means, first closed state switching means, second solenoid valve, device having switching function)
d3 Solenoid valve (supply means, equipment with switching function)
d4 Solenoid valve (surveillance discharge means, equipment with switching function)
d5 Solenoid valve (first closed state switching means, device with switching function)
B Main valve (air operated valve)
K1, K2, K3, K4, K5 Valve drive unit (air-operated valve drive mechanism)

Claims (15)

  1. 　操作空気で作動する空気作動弁の開閉状態を異常発生時に維持する開閉状態維持手段と、
    　前記空気作動弁の開閉状態維持モードから閉状態モードに切替える第１閉状態切替手段とを備えている
    　ことを特徴とする空気作動弁の駆動機構。     An open / closed state maintaining means for maintaining the open / closed state of an air-operated valve operated by operating air when an abnormality occurs, and
    A drive mechanism for an air-operated valve, which comprises a first closed-state switching means for switching from an open / closed state-maintaining mode to a closed-state mode.
  2. 　請求項１に記載の空気作動弁の駆動機構において、
    　前記操作空気のコントロールは切替機能を持った機器で構成されている
    　ことを特徴とする空気作動弁の駆動機構。     In the drive mechanism of the air-operated valve according to claim 1,
    The control of the operating air is a drive mechanism for an air-operated valve, characterized in that it is composed of a device having a switching function.
  3. 　請求項１に記載の空気作動弁の駆動機構において、
    　前記開閉状態維持手段は、
    　弾性体と、
    　前記弾性体に押圧され、操作空気で作動する空気作動弁を開閉するためのピストンと、
    　前記弾性体と前記ピストンの一部が収容され前記操作空気が供給または排出されることで前記ピストンが内部を移動するシリンダーであり、
    　前記第１閉状態切替手段は、
    　前記ピストンの内部に前記操作空気を供給する供給手段と、
    　異常発生時に前記シリンダー内の操作空気の排出を阻止するとともに、前記空気作動弁が開閉状態維持モードである場合に前記シリンダー内の操作空気を排出する切替手段とを有している
    　ことを特徴とする空気作動弁の駆動機構。     In the drive mechanism of the air-operated valve according to claim 1,
    The open / closed state maintaining means
    Elastic body and
    A piston for opening and closing an air-operated valve that is pressed by the elastic body and is operated by operating air,
    A cylinder in which the elastic body and a part of the piston are housed and the operating air is supplied or discharged so that the piston moves inside.
    The first closed state switching means is
    A supply means for supplying the operating air to the inside of the piston,
    It is characterized by having a switching means for blocking the discharge of the operating air in the cylinder when an abnormality occurs and for discharging the operating air in the cylinder when the air operating valve is in the open / closed state maintenance mode. The drive mechanism of the air-operated valve.
  4. 　請求項１に記載の空気作動弁の駆動機構において、
    　前記開閉状態維持手段は、
    　弾性体と、
    　前記弾性体に押圧され、操作空気で作動する空気作動弁を開閉するためのピストンと、
    　前記弾性体と前記ピストンの一部が収容され前記操作空気が供給または排出されることで前記ピストンが内部を移動するシリンダーであり、
    　前記第１閉状態切替手段は、
    　前記ピストンの内部に前記操作空気を供給する第１電磁弁と、
    　異常発生時に前記シリンダー内の操作空気の排出を阻止するとともに、前記空気作動弁が開閉状態維持モードである場合に前記シリンダー内の操作空気を排出する第２電磁弁とを有している
    　ことを特徴とする空気作動弁の駆動機構。     In the drive mechanism of the air-operated valve according to claim 1,
    The open / closed state maintaining means
    Elastic body and
    A piston for opening and closing an air-operated valve that is pressed by the elastic body and is operated by operating air,
    A cylinder in which the elastic body and a part of the piston are housed and the operating air is supplied or discharged so that the piston moves inside.
    The first closed state switching means is
    The first solenoid valve that supplies the operating air to the inside of the piston,
    It has a second solenoid valve that prevents the discharge of the operating air in the cylinder when an abnormality occurs and discharges the operating air in the cylinder when the air-operated valve is in the open / closed state maintenance mode. A characteristic air-operated valve drive mechanism.
  5. 　請求項１に記載の空気作動弁の駆動機構において、
    　弾性体と、
    　前記弾性体に押圧され、前記空気作動弁を開閉するピストンと、
    　前記弾性体と前記ピストンの一部が収容され前記操作空気が供給または排出されることで前記ピストンが内部を移動するシリンダーとを備え、
    　前記第１閉状態切替手段は、前記空気作動弁が開閉状態維持モードである場合に前記シリンダー内の操作空気を排出する
    　ことを特徴とする空気作動弁の駆動機構。     In the drive mechanism of the air-operated valve according to claim 1,
    Elastic body and
    A piston that is pressed by the elastic body to open and close the air-operated valve,
    It comprises a cylinder in which the elastic body and a part of the piston are accommodated and the piston moves inside by supplying or discharging the operating air.
    The first closed state switching means is a drive mechanism for an air-operated valve, which discharges operating air in the cylinder when the air-operated valve is in the open / closed state maintenance mode.
  6. 　請求項１から請求項５のうちの何れか一項に記載の空気作動弁の駆動機構において、
    　前記空気作動弁は、「開」、「開閉状態維持(Ｆａｉｌ　ａｓ　ｉｓ)」、「開閉状態維持からの強制閉」の各モードを有し、
    　前記操作空気のコントロールは電磁弁、モータ駆動の電動弁、爆破弁、または電磁弁を使用する切替弁の何れかで行われている
    　ことを特徴とする空気作動弁の駆動機構。     The drive mechanism for an air-operated valve according to any one of claims 1 to 5.
    The air-operated valve has each mode of "open", "maintenance of open / closed state (Fail is)", and "forced closing from maintenance of open / closed state".
    A drive mechanism for an air-operated valve, characterized in that control of the operating air is performed by either a solenoid valve, a motor-driven electric valve, a blast valve, or a switching valve using a solenoid valve.
  7. 　請求項１から請求項５のうちの何れか一項に記載の空気作動弁の駆動機構において、
    　供給口から操作空気を供給する複数の電磁弁を備えている
    　ことを特徴とする空気作動弁の駆動機構。     The drive mechanism for an air-operated valve according to any one of claims 1 to 5.
    An air-operated valve drive mechanism characterized by having multiple solenoid valves that supply operating air from a supply port.
  8. 　請求項１から請求項５のうちの何れか一項に記載の空気作動弁の駆動機構において、
    　前記操作空気の排出量を絞る流量調整手段と、
    　サーベランスモード時に前記操作空気を、前記流量調整手段を介して排出させるサーベランス排出手段とを備えている
    　ことを特徴とする空気作動弁の駆動機構。     The drive mechanism for an air-operated valve according to any one of claims 1 to 5.
    The flow rate adjusting means for reducing the amount of operating air discharged,
    A drive mechanism for an air-operated valve, comprising a surveillance discharge means for discharging the operating air in the surveillance mode via the flow rate adjusting means.
  9. 　請求項１に記載の空気作動弁の駆動機構において、
    　供給口から前記操作空気を供給することで前記空気作動弁を開維持する複数の供給手段と、
    　前記操作空気の排出量を絞る流量調整手段と、
    　サーベランスモード時に前記操作空気を、前記流量調整手段を介して排出させるサーベランス排出手段とを備えている
    　ことを特徴とする空気作動弁の駆動機構。     In the drive mechanism of the air-operated valve according to claim 1,
    A plurality of supply means for opening and maintaining the air actuated valve by supplying the operating air from the supply port, and
    The flow rate adjusting means for reducing the amount of operating air discharged,
    A drive mechanism for an air-operated valve, comprising a surveillance discharge means for discharging the operating air in the surveillance mode via the flow rate adjusting means.
  10. 　請求項１から請求項５のうちの何れか一項に記載の空気作動弁の駆動機構において、
    　前記空気作動弁の開閉状態維持モードから閉状態モードに切替える第２閉状態切替手段とを備えている
    　ことを特徴とする空気作動弁の駆動機構。     The drive mechanism for an air-operated valve according to any one of claims 1 to 5.
    A drive mechanism for an air-operated valve, which comprises a second closed-state switching means for switching from an open / closed state-maintaining mode to the closed-state mode of the air-operated valve.
  11. 　請求項１に記載の空気作動弁の駆動機構において、
    　供給口から前記操作空気を供給することで前記空気作動弁を開維持する複数の供給手段と、
    　前記操作空気の排出量を絞る流量調整手段と、
    　サーベランスモード時に前記操作空気を、前記流量調整手段を介して排出させるサーベランス排出手段と、
    　前記空気作動弁の開閉状態維持モードから閉状態モードに切替える第２閉状態切替手段とを備えている
    　ことを特徴とする空気作動弁の駆動機構。     In the drive mechanism of the air-operated valve according to claim 1,
    A plurality of supply means for opening and maintaining the air actuated valve by supplying the operating air from the supply port, and
    The flow rate adjusting means for reducing the amount of operating air discharged,
    A surveillance discharge means for discharging the operating air via the flow rate adjusting means in the surveillance mode, and a surveillance discharge means.
    A drive mechanism for an air-operated valve, which comprises a second closed-state switching means for switching from an open / closed state-maintaining mode to the closed-state mode of the air-operated valve.
  12. 　請求項１１に記載の空気作動弁の駆動機構において、
    　前記第２閉状態切替手段は、爆破弁である
    　ことを特徴とする空気作動弁の駆動機構。     In the drive mechanism of the air-operated valve according to claim 11,
    The second closed state switching means is an air-operated valve drive mechanism characterized by being an blast valve.
  13. 　請求項１から請求項５または請求項１１または請求項１２の何れか一項に記載の空気作動弁の駆動機構において、
    　前記空気作動弁は、原子力発電所の隔離弁である
    　ことを特徴とする空気作動弁の駆動機構。     The drive mechanism for an air-operated valve according to any one of claims 1 to 5 or 11 or 12.
    The air-operated valve is a drive mechanism for an air-operated valve, which is an isolation valve for a nuclear power plant.
  14. 　請求項１から請求項５または請求項１１または請求項１２の何れか一項に記載の空気作動弁の駆動機構において、
    　プラント設備用電源である常用電源、非常用電源、および計装用電源を組み合わせて、電源が供給される
    　ことを特徴とする空気作動弁の駆動機構。     The drive mechanism for an air-operated valve according to any one of claims 1 to 5 or 11 or 12.
    An air-operated valve drive mechanism characterized in that power is supplied by combining a regular power supply, an emergency power supply, and an instrument power supply, which are power supplies for plant equipment.
  15. 　請求項１から請求項５または請求項１１または請求項１２の何れか一項に記載の空気作動弁の駆動機構において、
    　前記空気作動弁は、常用の大容量電源を有していない場合に用いられる弁である
    　ことを特徴とする空気作動弁の駆動機構。     The drive mechanism for an air-operated valve according to any one of claims 1 to 5 or 11 or 12.
    The air-operated valve is a drive mechanism for an air-operated valve, which is a valve used when it does not have a regular large-capacity power supply.
PCT/JP2021/018568 2020-07-13 2021-05-17 Drive mechanism for air-operated valve WO2022014139A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61120088A (en) * 1984-11-16 1986-06-07 株式会社日立製作所 Safety system of nuclear reactor
JP2014085227A (en) * 2012-10-24 2014-05-12 Hitachi-Ge Nuclear Energy Ltd Static decay heat removal system and nuclear power plant facilities
JP2014173723A (en) * 2013-09-18 2014-09-22 Hitachi-Ge Nuclear Energy Ltd Remote control device, and remote control device of nuclear power plant

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61120088A (en) * 1984-11-16 1986-06-07 株式会社日立製作所 Safety system of nuclear reactor
JP2014085227A (en) * 2012-10-24 2014-05-12 Hitachi-Ge Nuclear Energy Ltd Static decay heat removal system and nuclear power plant facilities
JP2014173723A (en) * 2013-09-18 2014-09-22 Hitachi-Ge Nuclear Energy Ltd Remote control device, and remote control device of nuclear power plant

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