EP2242933A1 - 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

Info

Publication number
EP2242933A1
EP2242933A1 EP08715786A EP08715786A EP2242933A1 EP 2242933 A1 EP2242933 A1 EP 2242933A1 EP 08715786 A EP08715786 A EP 08715786A EP 08715786 A EP08715786 A EP 08715786A EP 2242933 A1 EP2242933 A1 EP 2242933A1
Authority
EP
European Patent Office
Prior art keywords
valve
directional
outlet
compressed air
inlet
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.)
Granted
Application number
EP08715786A
Other languages
German (de)
English (en)
Other versions
EP2242933B1 (fr
Inventor
Peter Christiani
Günter Gebauer
Bodo Neef
Markus Kleske
Udo Walden
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.)
Festo SE and Co KG
Original Assignee
Festo SE and Co KG
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 Festo SE and Co KG filed Critical Festo SE and Co KG
Publication of EP2242933A1 publication Critical patent/EP2242933A1/fr
Application granted granted Critical
Publication of EP2242933B1 publication Critical patent/EP2242933B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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 device for compressed-air systems and method for operating a soft-start device
  • the invention relates to a soft start device for compressed air systems and to a method for operating a soft start device.
  • the softstart device
  • the primary inlet is connected to a secondary outlet which can be coupled to at least one consumer via a valve circuit, to which compressed air at secondary pressure can be discharged, the secondary pressure being less than or equal to the primary pressure
  • a main valve of the type 2/2 -nc (normally closed) is switched on between the primary inlet and the secondary outlet, which can be bypassed by means of a bypass, a throttle device being switched on in the bypass,
  • main valve and throttle device are interconnected together with further directional valves of the valve circuit such that at a soft start, initially locked main valve, compressed air with respect to the primary pressure lower, gradually increasing secondary pressure at the secondary outlet is applied, up to a certain Ratio between secondary and primary pressure a switching operation of the main valve takes place in its open position, so that then compressed air with primary pressure reaches the secondary outlet, and
  • the valve circuit is set in such a standard venting switch position that the secondary outlet is vented.
  • Soft-start devices are used in compressed-air systems to supply compressed-air-sensitive functional units, such as, for example, service devices, etc., with compressed air, the pressure gradually increasing from a relatively low secondary pressure to the primary or operating pressure.
  • Pressure-impact-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 disclosed, for example, in EP 0 758 063 B1, in which a start valve in the form of a poppet valve is described, 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.
  • 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.
  • This object is achieved by a soft start device having the features of independent claim 1. Further developments of the invention are shown in the subclaims.
  • the inlet of the main valve designed as the fifth directional control valve of the type 2/2 -nc is connected to the primary inlet and the outlet is connected to the inlet of a fourth directional valve of the type 3/2 nc and, in parallel thereto, to the outlet of the throttle device fifth directional control valve is coupled to the output of the throttle device and in addition to an outlet of a sixth directional control valve of the type 4/2 -nc,
  • the inlet of the first directional control valve of type 3/2 -nc is connected to the primary inlet and the outlet is connected to the control side of the sixth directional valve, the first directional control valve being able to be vented via a venting outlet and being actively switchable via switching means arranged on the control side,
  • the inlet of the third directional control valve of the type 3/2 -nc is coupled to the primary inlet and the outlet of the third directional control valve is coupled to the control side of a fourth directional control valve of the type 3/2-nc, the third directional control valve being able to be vented via a venting outlet and arranged via the control side Switching means is actively switchable,
  • the outlet of the fourth directional valve is connected to the secondary outlet and parallel thereto with an inlet of the sixth directional valve, wherein the fourth directional valve is vented via a vent outlet, and -
  • the sixth directional control valve between a normal position and a functional position is switchable, wherein in the normal position, a first inlet connected to the secondary outlet and parallel to the outlet of the fourth directional valve 5, while the associated first vent outlet is open to the atmosphere, and a second inlet is coupled to the control side of the fifth-way valve, while an associated second vent outlet is open to the atmosphere, and wherein in the operative position, the inlet lo is connected to the outlet of the fourth directional valve and parallel to the secondary outlet and the associated outlet to the control side of the fifth Directional valve is coupled.
  • 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 activates the fourth directional control valve.
  • valves could, for example, form a so-called “slip-stick” effect, whereby these valves do not switch into their open or functional position as intended despite compressed air being applied to their control side
  • the diagnostic mode ensures that there is no malfunction of one of the valves during the softstart operation.
  • 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 Weg- states of the valves, in particular the non-actively switchable directional valves, provided.
  • the sensors can be designed, for example, as a reed switch. However, other sensor types can also be used.
  • a control device coupled to the switching means of the first and third directional 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.
  • the method according to the invention has the following method steps: Switching the first directional valve to its open position, whereby the control side of the sixth directional valve is supplied with compressed air,
  • 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 train between the primary inlet, the first directional control valve and the sixth directional control valve is faultless and, next, a diagnosis of the other strand 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 of 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 depending on the result. 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.
  • FIG. 1 shows a valve circuit including pressurized strands (bold lines) of a preferred embodiment of the soft-start device according to the invention in the rest position before the soft-start process
  • 2 shows the valve circuit according to FIG. 1 in the diagnostic mode when the first directional control valve is switched
  • FIG. 1 shows a valve circuit including pressurized strands (bold lines) of a preferred embodiment of the soft-start device according to the invention in the rest position before the soft-start process
  • FIG. 3 shows the valve circuit according to FIG. 1 in the diagnostic mode when the third directional control valve is switched, while the first directional control valve is in its nc position, FIG.
  • FIG. 5 shows the valve circuit according to FIG. 1 after the soft start process
  • FIG. 6 shows the valve circuit according to FIG. 1 during the venting process in standard venting switching position
  • FIG. 7 shows the valve circuit according to FIG. 1 during the venting process, the first directional control valve having a malfunction
  • FIG. 8 shows the valve circuit according to FIG. 1 during the venting process, wherein the third directional control valve malfunctions, FIG.
  • FIG. 9 shows the valve circuit according to FIG. 1 during the venting process, the fifth directional control valve malfunctioning, FIG.
  • FIG. 10 shows the valve circuit of FIG. 1 during the venting process, wherein the fourth directional control valve has a malfunction
  • 11 shows the valve circuit according to FIG. 1 during the venting process, wherein the sixth directional valve has a malfunction.
  • valve circuit can be housed together in a valve unit here. It is a primary inlet Pl provided, is supplied to the compressed air under primary pressure.
  • the primary inlet Pl 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 As shown in FIG. 1, the valve circuit according to the preferred embodiment is constructed as follows:
  • a fifth directional valve WV5 of the type 2/2 -nc is provided, whose inlet E5 with the primary inlet Pl and its outlet A5 is connected to the inlet E4 of a fourth directional valve WV4 of the type 3/2-nc and in parallel therewith with the outlet of a throttle valve. direction is connected 13, wherein the fifth-way 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 in its operating position described below located.
  • the fifth directional control valve WV5 is held in its NC position via a control spring 14 and additionally by means of compressed air supply by coupling to the primary inlet P1.
  • the fifth directional control valve WV5 is assigned a sensor for determining its current switching state.
  • a first directional valve WVl is arranged, the inlet El of which is connected to the primary inlet Pl and its outlet Al is connected to the control side S6 of a sixth directional valve WV6, wherein the first directional valve WVl can be vented via a vent outlet Rl and via control means arranged on the control side 16 is active switchable.
  • the first directional valve WVl is held in its nc position via a restoring spring 14.
  • a third directional valve WV3 is arranged parallel to the first directional valve WV1, whose inlet E3 is coupled to the primary inlet P1 and its outlet A3 is connected to the control side S4 of a fourth directional valve WV4 of the type 3/2 -nc, the third directional valve WV3 being connected 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 by means of a control spring 14 and additionally by means of compressed air injection by means of coupling to the outlet of the throttle device 13 and, in parallel thereto, by coupling to the output A5 of the fifth directional valve WV5.
  • the sixth directional control valve WV6 controlled by means of 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.
  • a switching position is shown in which all 3/2 or 2/2 way valves are in their nc position, and the sixth directional 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 P 1 originating from the primary inlet P 1 is present at the inlet E 1 of the closed first directional valve WV 1, parallel to this at the inlet E 5 of the closed fifth directional valve WV 5, and parallel thereto at the inlet E 3 of the third directional valve WV 3.
  • 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 there reaches 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.
  • An adjustable throttle valve is provided here as throttle device 13, and an additional fixed throttle in the form of a throttle bypass which bypasses the adjustable throttle. This prevents the flow path from being completely blocked when the throttle valve is closed. is closing. 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 control valve WV1 has switched into its open position so that compressed air and the primary pressure reach the control side S6 of the sixth directional control valve WV6.
  • 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. If the sixth directional valve WV6 switched to its functional position, as shown in Fig. 2, it can be ruled out that the sixth directional valve WV6 a Malfunction has.
  • FIG. 3 also shows the test mode in which, after it has been determined that the strand primary outlet, first Directional valve WVl and sixth directional 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 reach 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. If the fourth directional valve WV4 has switched to its open position shown in FIG.
  • the primary inlet P1, the third directional valve WV3 and the fourth directional valve WV4 are faultless. If, on the other hand, it is detected that the fourth directional control valve WV4 has not switched to the open position in accordance with the regulations, an abort also occurs here, ie the process is aborted until the fault has been rectified. In the event that the fourth directional control valve WV4 has switched to the open position in accordance with the regulations and the sensor 15 has transmitted the signals corresponding thereto via the detected switching state to the control device 20, the control device 20 activates the switching means 16 assigned to the first directional valve WV1, whereby automatically the soft start process shown in FIG. 4 is initiated.
  • Fig. 4 shows, as mentioned, a switching position when initiating the soft start process.
  • the first directional valve WVl and the third directional valve WV3 have switched to the correct position in their open position.
  • compressed air has accumulated under primary pressure
  • this compressed air quantity initially blocked between the outlet of the throttle device 13 and the input E4 of the fourth directional valve WV4 is discharged when the fourth directional valve WV4 is opened and gets to Primary outlet P2.
  • Compressed air under primary pressure can not flow immediately because the throttle device 13 is interposed, which throttles the upcoming compressed air under primary pressure to Sekunkärdruck.
  • 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 switching position after the SoftStartvorgang.
  • Fig. 6 shows a standard venting switch position for venting the secondary outlet P2.
  • the first and third directional valve WVl and WV3 have to be correctly incorporated in their nc
  • the vent outlets R4 and R6 are preferably combined to form a common central vent outlet 18 which is open to the atmosphere.
  • 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 coming from the secondary outlet P2 escapes via the exhaust 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 WVl has a malfunction, that has not switched back to its nc position.
  • the passage El-Al remains open and compressed air still remains on the control side S6 of the sixth directional valve WV6, so that it 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 control 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 venting outlet R3, whereby the fourth directional valve WV4 moves into its nc Position switches back.
  • Fig. 8 shows a venting switch position in which the third directional valve WV3 malfunctions, i. did not switch 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 WVl 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 Rl, whereby the sixth directional valve WV6 switches back to its normal position.
  • FIG. 9 shows a venting switching position in which the fifth directional control valve WV5 has a malfunction, that is, has not switched back 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 WVl 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 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 malfunctions, i. did not switch back to its nc position.
  • the vent outlet R4 is thus blocked. Bleeding is still possible because first and third directional valve WVl and WV3 have switched back to their nc positions in accordance with 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 shows a bleed switching position where the sixth directional valve WV6 malfunctions, i. has not returned to its normal position. As a result, the vent outlet R6 is blocked.
  • First and third directional valves 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 connections A6-E6 and the exhaust outlet R4, so that the fifth directional valve WV5 switches back to its nc position.

Landscapes

  • 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)

Abstract

L'invention concerne un dispositif de mise en pression progressive de systèmes d'air comprimé, comportant une entrée primaire (P1) alimentée par de l'air comprimé sous une pression primaire, cette entrée primaire (P1) étant reliée par l'intermédiaire d'un circuit de valves à au moins une sortie secondaire (P2) qui peut être couplée à un consommateur et de laquelle sort de l'air comprimé sous une pression secondaire, inférieure ou égale à la pression primaire. Entre l'entrée primaire (P1) et la sortie secondaire (P2) est intercalée une valve principale du type 2/2-nc (normalement fermée) laquelle peut être contournée au moyen d'une dérivation (17), un dispositif d'étranglement (13) étant couplé sur cette dérivation (17), la valve principale (WV5) et le dispositif d'étranglement (13) étant couplés ensemble avec d'autres valves (WV1, WV3, WV4, WV5, WV6) du circuit et le circuit de valves pouvant être mis en position de purge standard de manière à purger la sortie secondaire (P2). Les valves (WV1, WV3, WV4, WV5, WV6) du circuit sont reliées entre elles de sorte que plusieurs positions de purge soient possibles en plus de la position de purge standard, une de ces autres positions de purge possibles intervenant lorsqu'une quelconque des valves (WV1, WV3, WV4, WV5, WV6) présente un dysfonctionnement lors d'un processus d'actionnement provoquant normalement la position de purge standard.
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)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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

Publications (2)

Publication Number Publication Date
EP2242933A1 true EP2242933A1 (fr) 2010-10-27
EP2242933B1 EP2242933B1 (fr) 2013-01-09

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EP20080715786 Active EP2242933B1 (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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Country Link
US (1) US8567442B2 (fr)
EP (1) EP2242933B1 (fr)
CA (1) CA2715222C (fr)
WO (1) WO2009100734A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013065530A1 (fr) * 2011-11-02 2013-05-10 Smc株式会社 Dispositif de régulation de débit
JP2016512868A (ja) * 2013-03-15 2016-05-09 ロス オペレーティング バルブ カンパニーＲｏｓｓ Ｏｐｅｒａｔｉｎｇ Ｖａｌｖｅ Ｃｏｍｐａｎｙ ソフトスタート機能を有する制御信頼性のある空気エネルギー遮断弁
DE102014006357B3 (de) * 2014-04-30 2015-06-25 Festo Ag & Co. Kg Druckluftsystem mit Sicherheitsfunktion und Verfahren zum Betreiben eines solchen Druckluftsystems
EP3830428A1 (fr) * 2018-08-01 2021-06-09 Norgren AG Unité d'alimentation en air de sécurité

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Publication number Priority date Publication date Assignee Title
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
DE502006008678D1 (de) * 2006-12-05 2011-02-17 Festo Ag & Co Kg Softstart-Ventileinrichtung

Non-Patent Citations (1)

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Title
See references of WO2009100734A1 *

Also Published As

Publication number Publication date
US8567442B2 (en) 2013-10-29
CA2715222A1 (fr) 2009-08-20
EP2242933B1 (fr) 2013-01-09
CA2715222C (fr) 2014-09-30
US20110277843A1 (en) 2011-11-17
WO2009100734A1 (fr) 2009-08-20

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