WO2022107230A1 - 安全機能付きエア制御回路 - Google Patents

安全機能付きエア制御回路 Download PDF

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Publication number
WO2022107230A1
WO2022107230A1 PCT/JP2020/042879 JP2020042879W WO2022107230A1 WO 2022107230 A1 WO2022107230 A1 WO 2022107230A1 JP 2020042879 W JP2020042879 W JP 2020042879W WO 2022107230 A1 WO2022107230 A1 WO 2022107230A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
pilot
valve
solenoid valve
solenoid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2020/042879
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
▲円▼▲崎▼明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMC Corp
Original Assignee
SMC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SMC Corp filed Critical SMC Corp
Priority to PCT/JP2020/042879 priority Critical patent/WO2022107230A1/ja
Priority to PCT/JP2021/038850 priority patent/WO2022107540A1/ja
Priority to KR1020237015688A priority patent/KR20230107236A/ko
Priority to CN202180077306.5A priority patent/CN116507810B/zh
Priority to EP21894414.8A priority patent/EP4227542A4/en
Priority to JP2022563650A priority patent/JP7790353B2/ja
Priority to US18/252,911 priority patent/US12129878B2/en
Priority to TW110140262A priority patent/TWI905301B/zh
Publication of WO2022107230A1 publication Critical patent/WO2022107230A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F15B20/001—Double valve requiring the use of both hands simultaneously
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
    • F15B11/068—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam with valves for gradually putting pneumatic systems under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F15B20/008—Valve failure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/10—Delay devices or arrangements
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
    • G05D16/2024—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means the throttling means being a multiple-way valve
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
    • G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
    • G05D16/2033—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means the plurality of throttling means being arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3138—Directional control characterised by the positions of the valve element the positions being discrete
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/322—Directional control characterised by the type of actuation mechanically actuated by biasing means, e.g. spring-actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/355—Pilot pressure control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40576—Assemblies of multiple valves
    • F15B2211/40592—Assemblies of multiple valves with multiple valves in parallel flow paths
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41509—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and a directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/428—Flow control characterised by the type of actuation actuated by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5151—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/52—Pressure control characterised by the type of actuation
    • F15B2211/528—Pressure control characterised by the type of actuation actuated by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements
    • F15B2211/6355—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/67—Methods for controlling pilot pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7052—Single-acting output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/85—Control during special operating conditions
    • F15B2211/851—Control during special operating conditions during starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/875—Control measures for coping with failures
    • F15B2211/8752—Emergency operation mode, e.g. fail-safe operation mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/875—Control measures for coping with failures
    • F15B2211/8755—Emergency shut-down
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/875—Control measures for coping with failures
    • F15B2211/8757—Control measures for coping with failures using redundant components or assemblies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/885—Control specific to the type of fluid, e.g. specific to magnetorheological fluid
    • F15B2211/8855—Compressible fluids, e.g. specific to pneumatics

Definitions

  • the present invention relates to an air control circuit with a safety function for safely controlling an air device such as an air cylinder.
  • An air control circuit having a safety function for safely controlling an air device such as an air cylinder is known, for example, as shown in FIG.
  • a known air control circuit is configured by connecting two internal pilot type spring / return type 3-port solenoid valves 43, 44 in series in an air line 42 connecting an air source 40 and an air cylinder 41. Therefore, even if one of the solenoid valves 43 or 44 fails during the operation of the air cylinder 41 and does not operate normally, the air cylinder can be operated by turning off the other solenoid valve 44 or 43. The residual air in the 41 can be always exhausted.
  • a technical object of the present invention is to configure an air control circuit having a safety function for safely controlling an air device only by the air circuit without using a solenoid valve with a limit switch, a sequencer, or the like. be.
  • the air control circuit of the present invention includes a main airline in which two external pilot type electromagnetic valves are connected in series, and a pilot airline that supplies pilot air to the two electromagnetic valves.
  • the pilot airline has a pilot control line that switches between a supply state in which pilot air is supplied to the two electromagnetic valves and an exhaust state in which the pilot air of the two electromagnetic valves is exhausted.
  • the two solenoid valves of the main airline are two-position valves having a first position when off and a second position when on, and when the two solenoid valves are both in the first position, air.
  • While shutting off the source and the air equipment the air of the air equipment is exhausted through one of the solenoid valves, and when the two solenoid valves are both in the second position, the air source and the air equipment are connected.
  • the air source and the air equipment are shut off and the first position is reached. It is connected so as to exhaust the air of the air device through the solenoid valve at the one position.
  • an air operation valve for switching the pilot airline between the supply state and the exhaust state is connected to the pilot airline.
  • the pilot control line is configured to be connected to or disconnected from the air source by the two solenoid valves, and when the two solenoid valves are both in the first position and When both are in the second position, the air operation valve is held in the switching position where the pilot airline is in the supply state by being disconnected from the air source, and one of the two solenoid valves is in the first position. When the other is in the second position, the pilot airline exhausts the air operation valve by the control air supplied from the air source by being connected to the air source via the two solenoid valves. Switch to the state.
  • a pilot type check valve, a manual relief valve, and the air operation valve are connected to the pilot control line, and the pilot type check valve receives pilot air from the pilot airline.
  • the pilot check valve When acting on the pilot check valve, it allows a forward flow of the control air from the air source to the air operating valve in the pilot control line and a reverse flow in the opposite direction.
  • the pilot air When the pilot air is not acting on the pilot check valve, the reverse flow of the control air is blocked, and the manual relief valve allows the pilot control line to flow from the conduction state through which the control air can flow.
  • the control air may be configured to be manually switched to an open state for discharging the control air to the outside.
  • an air tank is connected to the pilot control line between the manual relief valve and the air operation valve, and the air tank stores control air supplied from the air source. It may be configured to supply to the air-operated valve.
  • the two solenoid valves are five-port valves, one input port, a first output port and a second output port, and a first exhaust port and a second exhaust port.
  • the two solenoid valves are a first solenoid valve connected to the air source side of the main airline and a second solenoid valve connected to the air equipment side of the main airline.
  • the input port of the first solenoid valve is connected to the air source
  • the first output port of the first solenoid valve is connected to the input port of the second solenoid valve
  • the first solenoid valve is the first.
  • the 2 output ports are connected to the 2nd exhaust port of the 2nd solenoid valve, the 1st exhaust port and the 2nd exhaust port of the 1st solenoid valve are opened to the outside, and the 1st output port of the 2nd solenoid valve is
  • the second output port of the second solenoid valve may be connected to the air device, the second output port of the second solenoid valve may be connected to the pilot control line, and the first exhaust port of the second solenoid valve may be open to the outside.
  • a delay mechanism for delaying the start of the air equipment may be connected to the main airline.
  • the delay mechanism is composed of a switching valve operated by air and a throttle valve that limits the flow rate of air, and the two solenoid valves are both turned on to turn on the air source and the air device.
  • the throttle valve When the throttle valve is connected to, a limited flow rate of air is circulated to the main airline, and a part of the air output from the main airline to the air equipment is fed back to the switching valve. It is desirable that the switching valve switch so that the air from the air source flows to the main airline in a free flow state.
  • the air control circuit having a safety function is configured only by the air circuit without using a solenoid valve with a limit switch, a sequencer, or the like, so that the configuration is very simple and the equipment cost is low. There is no need to secure a technician who is familiar with safety functions and sequencer programs.
  • the air control circuit 1A connects the air source 2 and the air device 3, and supplies the air from the air source 2 to the air device 3 or exhausts the air of the air device 3 to the outside.
  • a pilot that controls the air device 3 and supplies pilot air to the main airline 4 in which two external pilot solenoid valves 5a and 5b are connected in series and the two solenoid valves 5a and 5b. Pilot control to switch the airline 6 and the pilot airline 6 into a supply state in which pilot air is supplied to the two solenoid valves 5a and 5b and an exhaust state in which the pilot air of the two solenoid valves 5a and 5b is exhausted. It has a line 7.
  • the air device 3 is an air cylinder
  • the air cylinder 3 is a single motion in which the piston 3a and the rod 3b are reciprocally driven by the air supplied to the pressure chamber 3c and the return spring 3d. It is a shaped air cylinder.
  • the two solenoid valves 5a and 5b have the same configuration as each other, and the pilot air supplied and discharged by the on / off operation of one solenoid 10 and the return spring 11 provide the first position 12 at the time of off. And the second position 13 at the time of turning on. Therefore, it can be said that the solenoid valves 5a and 5b are single solenoid type spring / return type two-position valves. Further, the solenoid valves 5a and 5b are 5-port valves, and have one input port 14, a first output port 15a and a second output port 15b, and a first exhaust port 16a and a second exhaust port 16b. Have.
  • One of the two solenoid valves 5a and 5b is the first solenoid valve 5a connected to the air source 2 side of the main airline 4, and the other solenoid valve 5b is the main air. It is a second solenoid valve 5b connected to the air cylinder 3 side of the line 4.
  • the input port 14 of the first solenoid valve 5a is connected to the air source 2 through the input line 4a, and the first output port 15a of the first solenoid valve 5a is connected to the second solenoid through the first relay line 4b.
  • the second output port 15b of the first solenoid valve 5a is connected to the input port 14 of the valve 5b, and the second output port 15b of the first solenoid valve 5a is connected to the second exhaust port 16b of the second solenoid valve 5b through the second relay line 4c.
  • the first exhaust port 16a and the second exhaust port 16b of the valve 5a are opened to the outside via the silencer 17, respectively.
  • the first output port 15a of the second solenoid valve 5b is connected to the pressure chamber 3c of the air cylinder 3 through the output line 4d, and the second output port 15b of the second solenoid valve 5b is the pilot control line.
  • the first exhaust port 16a of the second solenoid valve 5b which is connected to one end of the seventh solenoid valve 7, is open to the outside via a silencer 17.
  • the two solenoid valves 5a and 5b connected to the main airline 4 control the air equipment by being constantly turned on and off at the same time by a control device (not shown), and the operation is as follows. Is.
  • the pilot control line 7 is connected to the first relay line 4b, the first output port 15a and the first solenoid valve 5a from the second output port 15b and the input port 14 of the second solenoid valve 5b. It is open to the outside through the exhaust port 16a.
  • the pilot control line 7 has the second relay line 4c, the second output port 15b of the first solenoid valve 5a, and the second output port 15b of the first solenoid valve 5a from the second output port 15b and the second exhaust port 16b of the second solenoid valve 5b. It is open to the outside through the second exhaust port 16b.
  • the air source The input line 4a from 2 is connected to the pilot control line 7 from the first solenoid valve 5a through the first relay line 4b and the second solenoid valve 5b to supply control air to the pilot control line 7. do.
  • the output line 4d leading to the air cylinder 3 is cut off from the air source 2 and opened to the outside through the first output port 15a and the first exhaust port 16a of the second solenoid valve 5b. The air of the air cylinder 3 is exhausted through the second solenoid valve 5b, and the air cylinder 3 returns to the initial position.
  • the second solenoid valve 5b fails and remains in the second position 13, the air is said. Since the input line 4a from the source 2 is connected to the pilot control line 7 from the first solenoid valve 5a through the second relay line 4c and the second solenoid valve 5b, control air is supplied to the pilot control line 7. Will be done. On the other hand, the output line 4d is cut off from the air source 2, and from the second solenoid valve 5b, the first relay line 4b, the first output port 15a and the first exhaust port of the first solenoid valve 5a. Since it is opened to the outside through 16a, the air of the air cylinder 3 is exhausted through the first solenoid valve 5a, and the air cylinder 3 returns to the initial position.
  • the pilot airline 6 branches from the position of the main airline 4 between the air source 2 and the first solenoid valve 5a, and operates the air connected to the pilot airline 6. It is connected to the pilot ports 21 of the first solenoid valve 5a and the second solenoid valve 5b via the valve 20, respectively.
  • the input side (the side connected to the air source 2) of the air operation valve 20 is referred to as the primary side
  • the output side is referred to as the secondary side. Therefore, in the pilot airline 6, the portion from the air source 2 to the air operation valve 20 is the primary side line 6a, and the portion from the air operation valve 20 to the two solenoid valves 5a and 5b is two. The next line 6b.
  • the air operation valve 20 is a 3-port valve that can be switched to two positions by the action of the control air supplied through the pilot control line 7 and the return spring 22. As shown in FIGS. 1 and 2, the air operation valve 20 is placed in the first position by the return spring 22 when the control air is not acting due to the pilot control line 7 being disconnected from the air source 2. By switching to 20a, the pilot airline 6 is held in a supply state in which the primary side line 6a and the secondary side line 6b are conductive, and as shown in FIGS. 3 and 4, the pilot control line 7 is maintained. When the control air acts by being connected to the air source 2, the control air switches to the second position 20b, thereby blocking the primary side line 6a and the secondary side line 6b of the pilot airline 6. At the same time, the secondary side line 6b is opened to the outside to bring it into an exhaust state.
  • a pilot check valve 23, a manual relief valve 24, and an air tank 25 are connected in series to the pilot control line 7 in order from the second solenoid valve 5b side toward the air operation valve 20 side.
  • An indicator lamp 26 indicating that control air is being supplied to the pilot control line 7 is connected to an indicator line 7a branching from a position between the manual relief valve 24 and the air tank 25.
  • the pilot check valve 23 conducts the pilot control line 7 in both directions when the pilot air from the pilot airline 6 acts, and causes the pilot control line 7 to conduct only in one direction when the pilot air does not act. It is to make it conductive. That is, the pilot type check valve 23 has a forward flow of control air from the air source 2 toward the air operation valve 20 in the pilot control line 7 and the air operation in the pilot control line 7 when the pilot air is operating. The reverse flow of the control air from the valve 20 side to the air source 2 side is allowed, and when the pilot air is not acting, only the forward flow of the control air is allowed, and the reverse flow is allowed. Stop.
  • the manual relief valve 24 is a 3-port valve that can be switched to two positions by the operating lever 27 and the return spring 28.
  • the pilot control line 7 holds the pilot control line 7 in a conductive state in which the control air can flow, and the operation lever.
  • the pilot control line 7 is switched to the second position 24b in FIG. 5 by 27, the pilot control line 7 is held in an open state for discharging the control air to the outside, and when the operation lever 27 is released, the return spring 28 causes the pilot control line 7. It returns to the first position 24a.
  • the air tank 25 stores the control air supplied from the air source 2 and then supplies the control air from the air tank 25 to the air operation valve 20 to stabilize the supply of the control air. ..
  • FIG. 1 shows a state in which the first solenoid valve 5a and the second solenoid valve 5b are both off and are in the first position 12, and the main airline 4 shuts off the air source 2 and the air cylinder 3. be.
  • the air cylinder 3 is moved to the initial position where the rod 3b is retracted. be.
  • the air operation valve 20 is at the first position 20a and holds the pilot airline 6 in the supply state. Therefore, the pilot air from the air source 2 is supplied to the first solenoid valve 5a and the second solenoid valve 5b through the pilot airline 6.
  • the pilot type check valve 23 conducts the pilot control line 7 in both directions by the action of pilot air.
  • the air control circuit 1A When the work process by the air cylinder 3 is completed, the air control circuit 1A returns to the operating state shown in FIG. 1 by turning off the first solenoid valve 5a and the second solenoid valve 5b at the same time. The cylinder 3 also returns to the initial position.
  • the air in the air cylinder 3 is exhausted through the returned solenoid valves 5a or 5b as described below.
  • the air cylinder 3 returns to the initial position, and at the same time, the pilot air of the first solenoid valve 5a and the second solenoid valve 5b is automatically exhausted, so that the first solenoid valve 5a is automatically exhausted. And the restart of the second solenoid valve 5b is prevented.
  • pilot control line 7 is connected to the air source 2 through the first solenoid valve 5a and the second solenoid valve 5b, control air is supplied to the pilot control line 7 from the air source 2.
  • This control air is stored in the air tank 25 through the pilot type check valve 23 and the manual relief valve 24, and then is supplied from the air tank 25 to the air operation valve 20 to switch the air operation valve 20 to the second position value 20b. .. Then, the primary side line 6a and the secondary side line 6b of the pilot airline 6 are cut off, and the secondary side line 6b is opened to the outside to be in an exhaust state.
  • the indicator lamp 26 lights up to notify the operator that any of the solenoid valves 5a and 5b has failed.
  • the pilot control line 7 is connected to the air source 2 through the second solenoid valve 5b and the first solenoid valve 5a, and control air is supplied to the pilot control line 7. Therefore, FIG. 3 shows. Similarly to the case, the pilot air of the first solenoid valve 5a and the second solenoid valve 5b is exhausted by the air operation valve 20, and the restart of the first solenoid valve 5a and the second solenoid valve 5b is prevented.
  • the pilot type check valve 23 and the indicator lamp 26 also operate in the same manner as described above.
  • the manual relief is performed as shown in FIG.
  • the manual relief valve 24 is switched to the second position 24b.
  • the pilot control line 7 is opened and the control air in the air air tank 25 is discharged to the outside. Therefore, the air operation valve 20 is switched to the first position 20a by the return spring 22, and the pilot airline is used. Put 6 in the supply state.
  • the pilot air from the air source 2 is supplied to the first solenoid valve 5a and the second solenoid valve 5b, so that the first solenoid valve 5a and the second solenoid valve 5b are in a restartable state. .. Further, the pilot type check valve 23 conducts the pilot control line 7 in both forward and reverse directions by the action of pilot air.
  • the air tank 25 is connected to the pilot control line 7, but the air tank 25 does not necessarily have to be provided.
  • the manual relief valve 24 is a 3-port valve, a 2-port valve can also be used.
  • FIG. 6 shows a connection example when a manual relief valve 24 including a 2-port valve is used.
  • the manual relief valve 24 is connected to the relief line 7b branching from the pilot control line 7.
  • the manual relief valve 24 is normally located at the first position 24a and shuts off the relief line 7b, but when the operating lever 27 is operated, the manual relief valve 24 switches to the second position 24b and the relief line is switched through the silencer 18. In order to open 7b to the outside, the control air in the pilot control line 7 is discharged to the outside.
  • FIG. 7 shows a second embodiment of the air control circuit according to the present invention, and the difference between the air control circuit 1B of the second embodiment and the air control circuit 1A of the first embodiment is that the main airline is used.
  • a delay mechanism 30 for delaying the start of the air cylinder 3 is connected to 4.
  • the delay mechanism 30 includes a switching valve 31 that is switched to two positions by air and a return spring 32, and a throttle valve 33 that limits the flow rate of air, and includes an air source 2 and a first solenoid valve 5a. It is connected in between.
  • the switching valve 31 is a 3-port valve, and has a first port 34 connected to an input line 4a of the main airline 4 and a second port 35 connected to a branch line 4e branching from the input line 4a.
  • the input port 14 of the first solenoid valve 5a has a third port 36 connected by a third relay line 4f, and the output line 4d connecting the second solenoid valve 5b and the air cylinder 3 has a feedback line 37.
  • the feedback air fed back and the return spring 32 switch between the first position 31a in FIG. 7 and the second position 31b in FIG.
  • the throttle valve 33 is a variable throttle valve whose flow path cross-sectional area can be adjusted.
  • both the first solenoid valve 5a and the second solenoid valve 5b are turned on and cut to the second position 13.
  • main airline 4 in FIG. 2 when the air source 2 and the air cylinder 3 are connected via the throttle valve 33, the air from the air source 2 flows through the throttle valve 33. Since the air cylinder 3 is supplied in a restricted state, the air cylinder 3 starts slowly.
  • the configuration and operation of the air control circuit 1B other than the delay mechanism 30 are the same as the configuration and operation of the air control circuit 1A of the first embodiment, the same components are designated by the same reference numerals. However, the description thereof will be omitted.
  • the switching valve 33 of the delay mechanism 30 is a 3-port valve, a 2-port valve can also be used.
  • the switching valve 31 and the throttle valve 33 are connected in parallel between the input line 4a and the third relay line 4f.
  • the switching valve 31 is at the first position 31a and shuts off the flow path, so that the air from the input line 4a is the third in a state where the flow rate is limited by the throttle valve 33. It is distributed to the relay line 4f.
  • the switching valve 31 switches to the second position 31b, so that the air from the input line 4a is in a free flow state through the switching valve 31. Will be distributed to the third relay line 4f.
  • an air cylinder is shown as an example of the air device 3, but the air device 3 may be a device other than an air cylinder, and for example, an air device such as an air cylinder may be controlled. It may be a pilot solenoid valve of. In this case, by connecting the output line 4d of the main airline 4 to the pilot line of the pilot solenoid valve, the pilot air of the pilot solenoid valve is exhausted and the air equipment is reset in an emergency. Control can be done.
  • the air control circuits 1A and 1B are configured only by the air circuit, the configuration is very simple as compared with the conventional one using a solenoid valve with a limit switch, a sequencer, or the like. It has the advantages of low equipment cost and no need to secure engineers who are familiar with safety functions and sequencer programs.
  • Air control circuit 2 Air source 3 Air equipment (air cylinder) 4 Main airline 5a 1st solenoid valve 5b 2nd solenoid valve 6 Pilot airline 7 Pilot control line 12 1st position 13 2nd position 14 Input port 15a 1st output port 15b 2nd output port 16a 1st exhaust port 16b 1st 2 Exhaust port 20 Air operation valve 23 Pilot type check valve 24 Manual relief valve 25 Air tank 30 Delay mechanism 31 Switching valve 33 Throttle valve

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Safety Devices In Control Systems (AREA)
PCT/JP2020/042879 2020-11-18 2020-11-18 安全機能付きエア制御回路 Ceased WO2022107230A1 (ja)

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Application Number Priority Date Filing Date Title
PCT/JP2020/042879 WO2022107230A1 (ja) 2020-11-18 2020-11-18 安全機能付きエア制御回路
PCT/JP2021/038850 WO2022107540A1 (ja) 2020-11-18 2021-10-21 安全機能付きエア制御回路
KR1020237015688A KR20230107236A (ko) 2020-11-18 2021-10-21 안전 기능을 갖는 에어 제어 회로
CN202180077306.5A CN116507810B (zh) 2020-11-18 2021-10-21 带安全功能的空气控制回路
EP21894414.8A EP4227542A4 (en) 2020-11-18 2021-10-21 AIR CONTROL CIRCUIT WITH SAFETY FUNCTION
JP2022563650A JP7790353B2 (ja) 2020-11-18 2021-10-21 安全機能付きエア制御回路
US18/252,911 US12129878B2 (en) 2020-11-18 2021-10-21 Air control circuit equipped with safety feature
TW110140262A TWI905301B (zh) 2020-11-18 2021-10-29 帶安全功能氣體控制迴路

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WO2022107540A1 (ja) 2022-05-27
TWI905301B (zh) 2025-11-21
CN116507810B (zh) 2026-02-27
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JP7790353B2 (ja) 2025-12-23
KR20230107236A (ko) 2023-07-14
TW202235752A (zh) 2022-09-16
EP4227542A1 (en) 2023-08-16
CN116507810A (zh) 2023-07-28
US12129878B2 (en) 2024-10-29
JPWO2022107540A1 (https=) 2022-05-27
US20230417262A1 (en) 2023-12-28

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