EP2242933B1 - Dispositif de mise en pression progressive de systèmes d'air comprimé et procédé de fonctionnement d'un dispositif de mise en pression progressive - Google Patents

Dispositif de mise en pression progressive de systèmes d'air comprimé et procédé de fonctionnement d'un dispositif de mise en pression progressive Download PDF

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Publication number
EP2242933B1
EP2242933B1 EP20080715786 EP08715786A EP2242933B1 EP 2242933 B1 EP2242933 B1 EP 2242933B1 EP 20080715786 EP20080715786 EP 20080715786 EP 08715786 A EP08715786 A EP 08715786A EP 2242933 B1 EP2242933 B1 EP 2242933B1
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EP
European Patent Office
Prior art keywords
directional valve
outlet
valve
directional
switching
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EP20080715786
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German (de)
English (en)
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EP2242933A1 (fr
Inventor
Peter Christiani
Günter Gebauer
Bodo Neef
Markus Kleske
Udo Walden
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Festo SE and Co KG
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Festo SE and Co KG
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Publication of EP2242933A1 publication Critical patent/EP2242933A1/fr
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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
    • 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
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F15B19/005—Fault detection or monitoring
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-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
    • F15B2211/30—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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant 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
    • F15B2211/40515—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
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41572—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and an output member
    • 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
    • F15B2211/40—Flow control
    • F15B2211/455—Control of flow in the feed line, i.e. meter-in 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/634—Electronic controllers using input signals representing a state of a 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
    • F15B2211/60—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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8376—Combined
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/86582—Pilot-actuated
    • Y10T137/86614—Electric
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86928—Sequentially progressive opening or closing of plural valves
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87322—With multi way valve having serial valve in at least one branch
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87917—Flow path with serial valves and/or closures

Definitions

  • Soft-start devices are used in compressed-air systems to supply compressed-air-sensitive functional units, such as maintenance devices, etc., with compressed air, the pressure gradually increasing from a relatively low secondary pressure to the primary or operating pressure.
  • Pressure shock prone functional units are, for example, filter units or double-acting pneumatic cylinders.
  • double-acting pneumatic cylinders it may happen that the piston is in a "neutral" state of the cylinder in a central position, so that, if the full pressure shock acting on the piston, this could suddenly drive into one of the end positions, causing damage to the Piston or could lead to the end stop of the cylinder.
  • a subordinate functional unit is actuated unintentionally by the unwanted piston movement, which in turn can lead to dangerous situations. Dangerous movements can also lead to personal injury. This is prevented by the soft start, so that the piston moves relatively slowly to its end position.
  • a soft start device is for example in the in EP 0 758 063 B1 discloses, in which a start valve is described in the form of a poppet valve, wherein the valve is vented via a quick exhaust.
  • the start valve has a Housing in which a single, extending from the inlet to the outlet flow path is formed, wherein in the flow path acting as a throttle seat valve is arranged.
  • a soft-start device of the type mentioned above, which offers a "one-fault-safety" is in the EP 1 645 755 A2 disclosed.
  • the secondary outlet can still be vented in case of malfunction of one of the valves.
  • this soft start device meets the requirements of standard EN 954-1, category 3.
  • the object of the invention is therefore to provide a soft start device or a method for operating a soft start device of the type mentioned above, with or with the prior to the initiation of the startup process, a diagnostic mode is feasible.
  • First and third directional control valves are thus connected in parallel, wherein the first directional control valve controls the sixth directional control valve and the third directional control valve actuates the fourth directional control valve.
  • the diagnostic mode ensures that there is no malfunction of one of the valves during the soft start process.
  • the non-actively switchable directional valves by adjusting springs and additionally by Pressurized with compressed air, held in its nc position to achieve pre-pressure independence.
  • the throttle device prefferably has an adjustable throttle valve and, in addition, a fixed throttle in the form of a throttle bypass which bypasses the adjustable throttle. This prevents the flow path is completely shut off when fully closing the throttle valve.
  • a sensor device with a plurality of sensors for determining the current switching states of the valves, in particular the non-actively switchable directional control valves.
  • the sensors can be designed, for example, as a reed switch. However, other sensor types can also be used.
  • a coupled to the switching means of the first and third directional control valve is provided. Characterized a signal transmission from the sensors to the control device and in dependence of an evaluation result of the control device to the switching means is possible.
  • the invention further comprises a method for operating a soft start device having the features of independent claim 11.
  • first and third directional control valves are connected in parallel, whereby the sixth directional control valve can be pressurized independently of the fourth directional control valve.
  • the sixth directional control valve can be pressurized independently of the fourth directional control valve.
  • there is first a switching of the first directional control valve with the result that the control side of the sixth directional valve is subjected to compressed air.
  • the switching state of the sixth-way valve is then by means of the sensor checked. If a shift has taken place, the link between the primary inlet, the first directional control valve and the sixth directional control valve is faultless and, next, a diagnosis of the other leg containing the third and the fourth directional control valve can be carried out. In this case, the first directional valve is again in its nc position.
  • a signal transmission corresponding to the result for the switching state inquiry takes place from the relevant sensor to the control device, with activation or no activation of the switching means associated with the first and third directional valve taking place as a function of the result. So if no error is detected, the soft start process can be initiated automatically. However, if an error is detected in one of the strands, the initiation of the softstart process is omitted.
  • the Fig. 1 to 11 show a preferred embodiment of the soft start device 11 according to the invention.
  • the components of the valve circuit can be accommodated together here in a valve unit.
  • There is a primary inlet P1 is provided, is supplied to the compressed air under primary pressure.
  • the primary inlet P1 is connected via a main flow path 12 to a secondary outlet P2, on which in turn compressed air is discharged under secondary pressure to the consumers.
  • valve circuit is constructed as follows:
  • a fifth directional valve WV5 of the type 2/2-nc is provided, its inlet E5 with the primary inlet P1 and its outlet A5 with the inlet E4 of a fourth directional valve WV4 of the type 3/2-nc and in parallel with the outlet of a throttle device 13 is connected, wherein the fifth directional control valve WV5 is the control side coupled to the output of the throttle device 13 and in addition to an outlet A6 of a sixth directional valve WV6 type 4/2-nc, if the sixth directional valve WV6 is in its functional position described below.
  • the fifth directional control valve WV5 is held in its NC position by means of a control spring 14 and additionally by means of compressed air injection by means of coupling to the primary inlet P1. Furthermore, the fifth directional control valve WV5 is assigned a sensor for determining its current switching state.
  • a first directional valve WV1 is arranged, whose inlet E1 is connected to the primary inlet P1 and whose outlet A1 is connected to the control side S6 of a sixth directional valve WV6, wherein the first directional valve WV1 can be vented via a venting outlet R1 and via switching means arranged on the control side 16 is active switchable. Furthermore, the first directional control valve WV1 is held in its nc position via a setting spring 14.
  • a third directional valve WV3 is arranged, whose inlet E3 is coupled to the primary inlet P1 and whose outlet A3 is coupled to the control side S4 of a fourth directional valve WV4 of the type 3/2-nc, the third directional valve WV3 via a venting outlet R3 can be vented and via switching means arranged switching means 16 is actively switched.
  • the fourth directional valve WV4 controlled by means of the third directional valve WV3 is connected via its outlet A4 to the secondary outlet P2 and parallel to an inlet E6 of a sixth directional valve WV6, wherein the fourth directional valve WV4 can be vented via a venting outlet R4.
  • the fourth directional control valve WV4 is held in its nc position via a control spring 14 and additionally by means of pressurized air via coupling to the outlet of the throttle device 13 and parallel to it via coupling to the output A5 of the fifth directional valve WV5.
  • a sensor 15 is provided for determining the current switching state of the fourth directional valve WV4.
  • the sixth directional valve WV6 controlled by the first directional control valve WV1 is switchable between a normal position and a functional position, with a first inlet E6 in the normal position with the secondary outlet P2 and is connected in parallel to the outlet A4 of the fourth directional valve WV4, while the associated first vent outlet R6 is open to the atmosphere.
  • a second inlet E6 * is further coupled to the control side S5 of the fifth directional valve WV5, while a corresponding second venting outlet R6 * is open to the atmosphere.
  • Fig. 1 is a switching position shown in which all 3/2 or 2/2-way valves are in their nc position, and the sixth directional control valve WV6 type 4/2-nc in its normal position.
  • This position could also be referred to as a rest position before the soft start process.
  • compressed air having primary pressure originating at the primary inlet P1 is in contact with the inlet E1 of the closed first directional valve WV1, parallel to it at the inlet E5 of the closed fifth directional valve WV5, and parallel thereto at the inlet E3 of the third directional valve WV3.
  • compressed air for supporting the adjusting spring 14 reaches the counter-control side of the fifth directional valve WV5.
  • compressed air flows into the bypass 17 and arrives there to the throttle device 13 and from there to the inlet E4 of the closed fourth directional valve WV4, to the outlet A5 of the closed fifth directional valve WV5 and to the control side S5 of the fifth directional valve WV5.
  • a throttle device 13 is here an adjustable throttle valve provided and additional a fixed throttle in the form of an adjustable throttle immediate throttle bypass. This prevents the flow path completely closed when the throttle valve is closed is. Rather, a quantity of compressed air via the throttle bypass, which has a relatively small cross section, can always reach the associated ports of the fourth and fifth directional valve WV4 and WV5.
  • the compressed air with primary pressure is still at the counter-control side of the fourth directional valve WV4 and thus supports the actuating force of the spring 14th
  • Fig. 2 shows a test mode in which initially only the first directional valve WV1 has switched to its open position, so that compressed air and the primary pressure to the control side S6 of the sixth directional valve WV6 passes.
  • a switching state inquiry of this sixth directional valve WV6 is carried out by means of the sensor 15 assigned to the sixth directional valve WV6.
  • the sensor 15 thus detects the switching state of the sixth directional valve WV6 and transmits with this corresponding signals to a control device 20.
  • Fig. 3 also shows the test mode, in which, after it has been determined that the strand primary outlet, first Directional valve WV1 and sixth directional control valve WV6 has no error, the third directional valve WV3 is switched to the open position.
  • the third directional valve WV3 is switched to its open position, so that compressed air and the primary pressure reaches the control side S4 of the fourth directional valve WV4.
  • a switching state query of the fourth directional valve WV4 is carried out by means of the associated sensor 15.
  • the signals corresponding to this switching state are in turn transmitted to the control device 20.
  • Fig. 4 shows, as mentioned, a switching position when initiating the soft start process.
  • the first directional control valve WV1 and the third directional control valve WV3 have switched to their open position in accordance with regulations.
  • the locked state of the fourth directional valve WV4 before the input E4 compressed air under primary pressure, but this, between the output of the throttle device 13 and the input E4 of the fourth directional valve WV4 initially trapped compressed air discharged at the opening of the fourth directional valve WV4 and arrives Primary outlet P2. Compressed air under primary pressure, however, can not flow immediately because the throttle device 13 is interposed, which throttles the upcoming compressed air under primary pressure to Sekunkärtik.
  • compressed air with secondary pressure reaches the fourth directional valve WV4 and there to the primary outlet P2.
  • compressed air flows under secondary pressure to the inlet E6 of the sixth directional valve WV6 and arrives there via the outlet A6 to the control side S5 of the fifth directional valve WV5.
  • the pressure at the secondary outlet P2 now rises again gradually until, after a certain ratio between secondary and primary pressure, a switching of the fifth directional valve WV5 into its open position is initiated.
  • the ratio between secondary and primary pressure may be, for example, in the range of> 0 to 1, in particular 0.4 to 0.6. It is particularly preferred to switch to the open position if the secondary pressure P2 is equal to approximately 0.5 ⁇ primary pressure P1.
  • Fig. 5 shows the switch position after the soft start process.
  • Fig. 6 shows a standard venting switch position for venting the secondary outlet P2.
  • the first and third directional valve WV1 and WV3 have switched back to their nc position in accordance with the regulations, so that the compressed air present at the control side S4 of the fourth directional valve WV4 is discharged via the Vent outlet R3 escapes while the compressed air present at the control side S6 of the sixth directional valve WV6 escapes via the vent outlet R1.
  • the fourth directional control valve WV4 has switched back to an nc position, while the sixth directional control valve WV6 has returned to its normal position.
  • Compressed air coming from the secondary outlet P2 can now escape via the vent outlet R4 of the fourth directional valve WV4 and additionally via the vent outlet R6 of the sixth directional valve WV6.
  • the vent outlets R4 and R6 to a common, open to the atmosphere central vent outlet 18 are summarized.
  • the central vent outlet 18 may also be associated with a muffler 19 for sound attenuation of the rotating compressed air.
  • the default bleed switch position will be set, i. Compressed air from the secondary outlet P2 escapes via the vent outlets R4 and R6 of the fourth and sixth directional valves WV4 and WV6.
  • Fig. 7 shows a venting switching position in which the first directional valve WV1 has a malfunction, that is, has not switched back to its nc position.
  • the passage E1-A1 remains open and compressed air is still at the control side S6 of the sixth directional valve WV6, so that this remains in its functional position.
  • the vent outlet R6 of the sixth directional valve WV6 is thus blocked.
  • venting is still possible because the third directional valve WV3 has switched back to its nc position in accordance with regulations so that compressed air present on the control side S4 of the fourth directional valve WV4 can escape via the vent outlet R3, whereby the fourth directional valve WV4 moves into its nc position back on.
  • Fig. 8 showed a venting switch position, in which the third directional valve WV3 has a malfunction, that is, has not switched back to its nc position.
  • the passage E3-A3 remains open and compressed air is still at the control side S4 of the fourth directional valve WV4, so that this remains in its open position.
  • the vent outlet R4 of the fourth directional valve WV4 is thus blocked.
  • venting is still possible because the first directional control valve WV1 has switched back to its nc position so that at the control side S6 of the sixth directional control valve WV6 upcoming compressed air can escape through the vent outlet R1, whereby the sixth directional valve WV6 switches back to its normal position.
  • Figure 9 shows a venting switch position, in which the fifth directional valve WV5 has a malfunction, that is, has not returned to its nc position.
  • the main flow path 12 remains open via E5-A5, so that compressed air originating from the primary inlet P1 can flow in.
  • venting is still possible because the two-way valves WV1 and WV3 have switched back to their nc positions, whereby both the control side S4 of the fourth directional valve WV4 and the control side S6 of the sixth directional valve WV6 vented be so that fourth and sixth directional valve WV4 and WV6 have switched back to their nc position or normal position. This in turn makes it possible to vent the compressed air coming from the secondary outlet P2 via the vent outlets R4 and R6.
  • Fig. 10 shows a venting switch position in which the fourth directional valve WV4 has a malfunction, that is, has not switched back to its nc position.
  • the vent outlet R4 is thus blocked. Bleeding is still possible because first and third directional valve WV1 and WV3 have switched back to their nc positions in accordance with the regulations, whereby in particular the control side S6 of the sixth directional valve WV6 is vented, so that this switches back to its normal position, so that at the control side S5 of the fifth directional valve WV5 is vented via the connections E6 * and R6 *, so that the fifth directional valve WV5 also switches back to its nc position. Compressed air coming from the secondary outlet P2 can now escape via the vent outlet R6.
  • Fig. 11 finally shows a venting switching position in which the sixth directional valve WV6 has a malfunction, that has not returned to its normal position.
  • the vent outlet R6 is blocked.
  • First and third directional valve WV1 and WV3, however, have switched back to their nc position in accordance with regulations, so that the control side S4 of the fourth directional valve WV4 is vented, as a result of which it switches back into its nc position, so that the compressed air originating from the secondary outlet P2 escapes via the venting outlet R4 can.
  • the control side S5 is vented via the ports A6-E6 and the vent outlet R4, so that the fifth-way valve WV5 switches back to its nc position.

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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)
  • Multiple-Way Valves (AREA)

Claims (11)

  1. Dispositif de mise en pression progressive pour des systèmes d'air comprimé,
    - comportant une entrée primaire (P1), à laquelle peut être amené de l'air comprimé sous pression primaire,
    - sachant que l'entrée primaire (P1) est reliée par l'intermédiaire d'un circuit de valves à une sortie secondaire (P2) pouvant être couplée à au moins un consommateur, au niveau de laquelle de l'air comprimé sous pression secondaire peut être évacué, sachant que la pression secondaire est inférieure ou égale à la pression primaire,
    - sachant qu'est installée entre l'entrée primaire (P1) et la sortie secondaire (P2) une valve principale (WV5) du type 2/2-nc (normalement fermée), laquelle peut être contournée au moyen d'une dérivation (17), sachant qu'un système d'étranglement (13) est installé dans la dérivation (17),
    - sachant que la valve principale (WV5) et le système d'étranglement (13) sont commutés conjointement avec d'autres valves (WV1, WV3, WV4, WV6) du circuit de valves de telle manière que lors d'un processus de mise sous pression, lorsque la valve principale (WV5) est tout d'abord fermée, de l'air comprimé présentant une pression secondaire plus faible par rapport à la pression primaire, puis augmentant au fur et à mesure est présent au niveau de la sortie secondaire (P2) jusqu'à ce qu'à partir d'un certain rapport entre la pression secondaire et la pression primaire, un processus de commutation de la valve principale (WV5) ait lieu dans sa position ouverte de sorte qu'alors de l'air comprimé présentant une pression primaire parvienne jusqu'à la sortie secondaire (P2) et
    - que le circuit de valves peut être amené dans une position de purge standard telle que la sortie secondaire (P2) est purgée,
    caractérisé en ce que
    - l'entrée (E5) de la valve principale réalisée comme une cinquième valve (WV5) du type 2/2-nc est reliée à l'entrée primaire (P1) et la sortie (A5) est reliée à l'entrée (E4) d'une quatrième valve (WV4) du type 3/2-nc et en parallèle reliée à la sortie du système d'étranglement (13), sachant que la cinquième valve (WV5) est couplée côté commande à la sortie du système d'étranglement (13) et en plus à une sortie (A6) d'une sixième valve (WV6) du type 4/2-nc,
    - l'entrée (E1) de la première valve (WV1) du type 3/2-nc est reliée à l'entrée primaire (P1) et la sortie (A1) au côté de commande (S6) de la sixième valve (WV6), sachant que la première valve (WV1) peut être purgée par l'intermédiaire d'une sortie de purge (R1) et être activement commutée par l'intermédiaire de moyens de commutation (16) disposés côté commande,
    - l'entrée (E3) de la troisième valve (WV3) du type 3/2-nc est couplée à l'entrée primaire (P1) et la sortie (A3) de la troisième valve (WV3) est couplée au côté de commande (S4) d'une quatrième valve (WV4) du type 3/2-nc, sachant que la troisième valve (WV3) peut être purgée par l'intermédiaire d'une sortie de purge (R3) et peut être commutée activement par l'intermédiaire de moyens de commutation (16) disposés côté commande,
    - la sortie (A4) de la quatrième valve (WV4) est reliée à la sortie secondaire (P2) et en parallèle à l'entrée (E6) de la sixième valve (WV6), sachant que la quatrième valve (WV4) peut être purgée par l'intermédiaire d'une sortie de purge (R4), et
    - la sixième valve (WV6) peut être commutée entre une position normale et une position fonctionnelle, sachant que dans la position normale, une première entrée (E6) est reliée à la sortie secondaire (P2) et en parallèle à la sortie (A4) de la quatrième valve (WV4), tandis que la première sortie de purge associée (R6) est ouverte en direction de l'atmosphère, et une deuxième entrée (E6*) est couplée au côté de commande (S5) de la cinquième valve (WV5), tandis qu'une deuxième sortie de purge (R6*) associée est ouverte en direction de l'atmosphère, et sachant que dans la position fonctionnelle, l'entrée (E6) est reliée à la sortie (A4) de la quatrième valve (WV4) et en parallèle à la sortie secondaire (P2) et la sortie (A6) associée est couplée au côté de commande (S5) de la cinquième valve (WV5).
  2. Dispositif de mise sous pression progressive selon la revendication 1, caractérisé en ce que les sorties de purge (R4, R6) de la quatrième valve et de la sixième valve sont rassemblées en une sortie de purge centrale (18) commune ouverte en direction de l'atmosphère.
  3. Dispositif de mise sous pression progressive selon la revendication 1 ou 2, caractérisé en ce qu'un silencieux (19) servant à atténuer le bruit de l'air comprimé entrant est associé à la sortie de purge centrale (18).
  4. Dispositif de mise sous pression progressive selon l'une quelconque des revendications précédentes, caractérisé en ce que la cinquième valve (WV5) est maintenue dans sa position nc par un ressort de réglage (14) et par exposition à de l'air comprimé au moyen du couplage à l'entrée primaire (P1), et en ce que la quatrième valve (WV4) est maintenue dans sa position nc par un ressort de réglage (14) et en plus par exposition à de l'air comprimé au moyen du couplage à la sortie (A5) de la cinquième valve et en parallèle à la sortie du système d'étranglement, et en ce que la sixième valve (WV6) est maintenue dans sa position normale par un ressort de réglage (14) et en plus par exposition à de l'air comprimé au moyen du couplage à la sortie secondaire (P2) et en parallèle à la sortie (A4) de la quatrième valve (WV4).
  5. Dispositif de mise sous pression progressive selon l'une quelconque des revendications précédentes, caractérisé en ce que le système d'étranglement (13) présente une valve d'étranglement pouvant être ajustée et en plus un étranglement fixe sous la forme d'une dérivation d'étranglement contournant l'étranglement pouvant être ajusté.
  6. Dispositif de mise sous pression progressive selon l'une quelconque des revendications précédentes, caractérisé en ce que le rapport entre la pression secondaire et la pression primaire, à partir duquel un processus de commutation de la valve principale (WV5) a lieu dans la position ouverte, se situe dans la plage allant de > 0 à 1, de manière usuelle dans la plage allant de 0,4 à 0,6.
  7. Dispositif de mise sous pression progressive selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un système de détection doté de plusieurs détecteurs (15) est prévu afin de constater les états de commutation du moment des valves, en particulier des valves pouvant être commutées de manière non active.
  8. Dispositif de mise sous pression progressive selon la revendication 7, caractérisé en ce que les détecteurs sont réalisés comme des interrupteurs à lames souples.
  9. Dispositif de mise sous pression progressive selon l'une quelconque des revendications précédentes, caractérisé en ce qu'est un prévu un système de commande (20) couplé aux moyens de commutation de la première valve et de la troisième valve (WV1, WV3).
  10. Procédé servant à faire fonctionner un dispositif de mise sous pression progressive selon l'une quelconque des revendications 1 à 9, lequel comprend les étapes suivantes consistant à :
    - commuter la première valve (WV1) dans sa position ouverte ce qui permet de soumettre le côté de commande (S6) de la sixième valve (WV6) à l'action de l'air comprimé,
    - déterminer l'état de commutation de la sixième valve (WV6) au moyen du capteur (15) associé,
    - constater le résultat de demande relative à l'état de commutation, sachant que lors d'un processus de commutation constatée de la sixième valve (WV6), un processus de commutation de la troisième valve (WV3) ou le processus de mise sous pression progressive est initié,
    - commuter la troisième valve (WV3) dans sa position ouverte après ou en variante avant la commutation de la première valve (WV1), sachant que la première valve (WV1) est lors de la commutation de la troisième valve (WV3) dans sa position nc, sachant que la commutation de la troisième valve (WV3) permet de soumettre le côté de commande (S4) de la quatrième valve (WV4) à l'action de l'air comprimé,
    - déterminer l'état de commutation de la quatrième valve (WV4) au moyen du capteur (15) associé,
    - constater le résultat de la demande relative à l'état de commutation, sachant que lors de la constatation du processus de commutation de la quatrième valve (WV4), un processus de commutation de la première valve (WV1) ou le processus de mise sous pression progressive est initié.
  11. Procédé selon la revendication 10, caractérisé en ce qu'une transmission de signal correspondant au résultat de la demande relative à l'état de commutation par le capteur (15) concerné au système de commande (20) a lieu, et en ce qu'en fonction du résultat de l'état de commutation, une activation ou pas des moyens de commutation (16) associés à la première valve et à la troisième valve (WV1, WV3) a lieu.
EP20080715786 2008-02-15 2008-02-15 Dispositif de mise en pression progressive de systèmes d'air comprimé et procédé de fonctionnement d'un dispositif de mise en pression progressive Active EP2242933B1 (fr)

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PCT/EP2008/001164 WO2009100734A1 (fr) 2008-02-15 2008-02-15 Dispositif de mise en pression progressive de systèmes d'air comprimé et procédé de fonctionnement d'un dispositif de mise en pression progressive

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EP2242933B1 true EP2242933B1 (fr) 2013-01-09

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US9372485B2 (en) * 2011-11-02 2016-06-21 Smc Kabushiki Kaisha Flow rate control device
BR112015021879A2 (pt) * 2013-03-15 2017-07-18 Ross Operating Valve Co válvula de isolamento de energia pneumática de controle confiável com função de início suave
DE102014006357B3 (de) * 2014-04-30 2015-06-25 Festo Ag & Co. Kg Druckluftsystem mit Sicherheitsfunktion und Verfahren zum Betreiben eines solchen Druckluftsystems
WO2020025766A1 (fr) * 2018-08-01 2020-02-06 Norgren Ag Unité d'alimentation en air de sécurité

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JPS62118059A (ja) * 1985-11-15 1987-05-29 Showa Seiki Kogyo Kk エアモ−タからなる内燃機関用始動装置
US5038813A (en) * 1990-05-21 1991-08-13 Rossow David E Pneumatic starter device
US5067519A (en) * 1990-11-26 1991-11-26 Ross Operating Valve Company Safety valve for fluid systems
JPH086727B2 (ja) * 1991-04-09 1996-01-29 エスエムシー株式会社 スロースタートバルブ
US5337788A (en) * 1993-10-22 1994-08-16 Robertshaw Controls Company Pneumatic valve with slow start and quick exhaust
US5669422A (en) * 1995-04-07 1997-09-23 Ckd Corporation Slow start valve
AT404065B (de) 1995-08-04 1998-08-25 Hygrama Ag Startventil für pneumatische anlagen
ITMI20032562A1 (it) * 2003-12-22 2005-06-23 Metal Work Spa Gruppo di avviamento progressivo per impianti pneumatici
DE202004015468U1 (de) 2004-10-06 2005-01-05 Festo Ag & Co.Kg Softstartvorrichtung für Druckluftsysteme
EP1930638B1 (fr) * 2006-12-05 2011-01-05 FESTO AG & Co. KG Soupape à ouverture douce

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Publication number Publication date
EP2242933A1 (fr) 2010-10-27
CA2715222A1 (fr) 2009-08-20
US8567442B2 (en) 2013-10-29
US20110277843A1 (en) 2011-11-17
WO2009100734A1 (fr) 2009-08-20
CA2715222C (fr) 2014-09-30

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