EP2622229B1 - Appareil d'entretien à air comprimé et dispositif de commande d'utilisateur équipé de ce dernier - Google Patents

Appareil d'entretien à air comprimé et dispositif de commande d'utilisateur équipé de ce dernier Download PDF

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Publication number
EP2622229B1
EP2622229B1 EP12703245.6A EP12703245A EP2622229B1 EP 2622229 B1 EP2622229 B1 EP 2622229B1 EP 12703245 A EP12703245 A EP 12703245A EP 2622229 B1 EP2622229 B1 EP 2622229B1
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EP
European Patent Office
Prior art keywords
compressed air
switch
electronic control
outlet
air maintenance
Prior art date
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Application number
EP12703245.6A
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German (de)
English (en)
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EP2622229A1 (fr
Inventor
Ralf Medow
Michael Streck
Rolf Hartnagel
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
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Festo SE and Co KG
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Publication date
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Publication of EP2622229A1 publication Critical patent/EP2622229A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • 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
    • F15B19/002—Calibrating
    • 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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/048—Arrangements for compressed air preparation, e.g. comprising air driers, air condensers, filters, lubricators or pressure regulators
    • 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
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3111—Neutral or centre positions the pump port being closed in the centre position, e.g. so-called closed centre
    • 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
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F15B2211/6309—Electronic controllers using input signals representing a pressure the pressure being a pressure source supply 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
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/632—Electronic controllers using input signals representing a flow rate
    • F15B2211/6323—Electronic controllers using input signals representing a flow rate the flow rate being a pressure source flow rate
    • 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
    • F15B2211/857—Monitoring of fluid pressure 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/88—Control measures for saving energy
    • 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 invention further relates to a consumer control device suitable for controlling a consumer device, which is equipped with at least one compressed air maintenance device of the aforementioned type and an electronic control device connected or connectable thereto.
  • a trained in the aforementioned sense of the prior art is known from DE 19746179 C2 known.
  • This is a compressed air maintenance unit which can be fluidly connected to a consumer device to be supplied with compressed air.
  • the compressed air maintenance unit consists of several modules that can be strung together in any order and number.
  • a module of the known compressed air maintenance unit is designed as a monitoring module which has an electronic central unit and can be connected to an external bus system via a corresponding interface.
  • the monitoring module may be provided with indicators and controls, or alternatively may include a diagnostic and operator interface for an external display and control device.
  • a pressure sensor is used for pressure detection connected.
  • a flow meter module for measuring the air flow rate may be present.
  • the known compressed air maintenance unit includes a switch valve module equipped with a switch-on valve, with the aid of which the input-side supplied compressed air can either be passed or shut off.
  • on-off valves also have a three-way function, so that when the compressed air is shut off, they assume a venting position, in which the working outlet is connected to the atmosphere, so that it adjoins the working outlet Outlet channel including the connected consumer device is vented.
  • a compressed air maintenance device which is composed of a plurality of modules, among which, for example, a start valve, a flow meter, a control module or a monitoring module is located. Also sensor devices for pressure detection or flow detection can be present.
  • the DE 10355250 A1 describes a method and an associated device for detecting leakage in a working device equipped with a working cylinder.
  • the device includes a pressure sensor that detects the pressure of the pressure medium, wherein due to the pressure fluctuations, a loss of the pressure medium is determined.
  • a volumetric flow sensor arranged in the supply lines detects the volumetric flow of the flowing pressure medium, whereby due to a physical equation the pressure measurement value and the volumetric flow measured value are brought into a specific relationship in order to determine the leakage occurring thereon.
  • Compressed air maintenance devices of the type mentioned are generally equipped with on-valves, which have two possible switching positions.
  • a first switching position is designed as a working position and establishes a connection of the feed input to the working output and thus to a connected external consumer device.
  • the feed input is from the working output separated.
  • the second switching position is a venting position, the outlet channel with the external consumer device connected to it is also vented at the same time.
  • Other types of shut-off valves completely shut off the outlet channel in the second switching position, so that no venting is possible.
  • the bleeding function is an important aspect in the compressed air supply of a connected consumer device.
  • a disadvantage of previous compressed air maintenance devices whose on-valve has a venting position is the fact that in an operating stoppage of the connected external consumer device, an unnecessary air consumption is recorded.
  • the switch-on valve remains in the working position, compressed air is constantly forced into the outlet channel under high pressure despite the fact that the consumer device is not operated, and this is lost in part due to unavoidable leakage.
  • the on-off valve is switched to the venting position, a complete emptying of the outlet channel and the consumer device connected thereto takes place, so that when the consumer device starts up again, the emptied channel system must first be completely filled again. From an energetic point of view, such concomitant circumstances are no longer up to date when it comes to driving external consumers.
  • the object is also achieved in a consumer control device which has such a configured compressed air maintenance device and a connected or connectable external electronic control device.
  • the inventive idea includes that the compressed air maintenance device with both a pressure sensor and a Flow sensor is equipped or - depending on the type of monitoring required - has only one pressure sensor or only one flow sensor.
  • flow is used by way of example and for simplification for the correct terms such as "volume flow”, “flow rate” or “flow rate” and denotes a flow rate per unit time.
  • the switch-on valve which has a three-way function, is designed as a 3/3-way valve and can assume a total of three alternative switch positions.
  • a venting position or a shutoff position can be realized in order either to completely empty the compressed air located in the outlet channel and the external consumer device connected thereto or to block it as a closed volume during temporary pauses in the operation of the external consumer device.
  • the internal electronic control unit which can be operated optionally in a teach-in mode or in a monitoring mode.
  • the latter enables the output of an arbitrarily usable electrical diagnostic signal, if the internal pressure sensor and / or flow sensor of the compressed air service unit are used to determine compressed air conditions that are caused by deviate from the expected or tolerable values during normal operation. Deviating operating states can be based, for example, on leakage or malfunction of components of a connected external consumer device.
  • a particularly effective monitoring is made possible by the fact that the internal electronic control device - in particular in connection with the first commissioning of a connected external consumer device - is operable in a teach-in mode to individually record reference information relating to pressure and / or flow, which in the subsequent operation during a Monitoring mode of the internal electronic control unit can be used for comparison with currently measured actual information.
  • the monitoring functionality of the compressed air maintenance device can thus be adapted very flexibly to the particular application.
  • the pressure sensor it is possible, in particular, to monitor the pressure drop of the outlet pressure during the shut-off position of the on-off valve and, if necessary, to output an alarm signal if the pressure drop is too fast by comparison with the taught reference information. In this way, leakage monitoring of the example formed by a machine external consumer device is possible.
  • the compressed air maintenance device is designed in the form of a self-supporting assembly in which all its components are integrated, so that there is an extremely compact and easy to integrate in existing compressed air networks compressed air maintenance unit.
  • the compressed air service device is equipped with a flow sensor which determines the flow rate on the basis of determined pressure values, in particular on the basis of determined pressure differences
  • a pressure sensor belonging to the flow sensor can simultaneously also be used as a pressure sensor for detecting the outlet pressure prevailing in the outlet channel. A separate pressure sensor is then unnecessary.
  • the compressed air maintenance device is expediently provided directly with optical display means and / or with acoustic warning means which can be actuated on the basis of an electrical diagnostic signal generated by the output means in order to point out problematic operating conditions directly on site.
  • the compressed air maintenance device is designed so that the electrical diagnostic signal generated by it can be processed externally.
  • the compressed air maintenance device may be equipped with at least one communication interface to which an external electronic control device, in particular acting as a higher-level controller, and / or an electronic information reader and / or at least one further external electronic device can be connected.
  • an external electronic control device in particular acting as a higher-level controller
  • two communication interfaces may be present, one of which is usable for communication with the external electronic control device, while the other is used as a diagnostic interface for connection to the information reader can be used.
  • the respective communication interface is preferably of an electromechanical type, which allows a very secure signal transmission, in particular via a connectable electrical cable.
  • at least one of the communication interfaces is designed as a bus interface to allow the connection of an external bus leading to an external electronic control device, wherein any bus standards are applicable.
  • At least one communication interface is equipped for wireless signal transmission, in particular for fault reporting via a mobile radio network and / or for other wireless network connection.
  • Particularly advantageous is a pertinent design of the at least one communication interface that a bidirectional signal transmission is possible.
  • At least one communication interface can be designed for input and / or output of binary and / or analog signals.
  • Such a communication interface is present in particular in addition to a communication interface embodied as a bus interface.
  • the switching commands for the switch-on valve are expediently fed from the outside into the compressed air maintenance device and originate from the connected external electronic control device.
  • the internal electronic control unit has to act in this case only as a transmitter of switching signals, without the same process even more specific. This reduces the burden of at least one to the internal electronic control device associated microprocessor.
  • the compressed air maintenance device is expediently equipped with suitable input means.
  • suitable input means consist for example of at least one button and / or at least one switch, which are arranged outside easily accessible on the housing of the compressed air maintenance device.
  • possibilities can also be provided to be able to carry out teaching or teaching purely electrically, for example via a special operator control device or by an external electronic control device which usually communicates with the compressed air maintenance device, for which purpose the compressed air maintenance device has at least may have an electrical interface, which may be formed in particular by one of the already mentioned communication interfaces.
  • the actual information required during the monitoring mode of the internal electronic control unit is expediently recorded in the same time interval as before the reference information during the teach-in mode.
  • the internal electronic control device regularly records the actual information only once or several times or several times, depending on the mode of operation.
  • the electrical diagnostic signal can also be used to initiate certain, in particular safety-relevant actions, in addition to pure operational monitoring.
  • the compressed air maintenance device may be formed, for example, in response to the comparison result of the comparator means to cause a switching operation of the on-off valve. For example, switching over of the on-off valve into the shut-off position may be caused if no appreciable flow is detected in the outlet channel during the working position over a relatively long period of time.
  • FIG. 1 shows a schematic representation of a preferred construction of the consumer control device according to the invention with an inventive integrated compressed air maintenance device of a particularly useful structure.
  • the designated in its entirety by reference numeral 1 consumer control device contains as a main component at least one preferably designed in the form of a self-supporting unit compressed air service unit 2.
  • This compressed air service unit 2 can, if necessary together with other maintenance modules, one of which is indicated by dash-dotted lines 3, to a Compressed air treatment device 4 are summarized.
  • At least one further maintenance module is for example a pressure control module, a filter module and / or an air drying module in question.
  • the compressed air maintenance device 2 has a device housing 5, illustrated in a simplified manner as a frame, which carries and / or encloses the further components of the compressed air maintenance device 2.
  • the device inlet 6 On the outside of the device housing 5 there is a device inlet 6, a device outlet 7 and a vent outlet 8.
  • the device inlet 6 is designed to be connected to a compressed air source P via a fluid line designated as a feed line 12 to become. Shown is the connected to the device inlet 6 state of such a compressed air source P.
  • the device outlet 7 is designed to connect to a leading to an external consumer device A, designated as working line 13 fluid line can. Shown is a state in which a consumer device A - for example, a machine having a plurality of fluid-operated working components - connected to the device outlet 7.
  • the vent outlet 8 communicates with the atmosphere R.
  • a not further muffler is suitably connected to the vent outlet 8. Even a controlled exhaust air discharge by means of a connectable fluid line is possible.
  • the compressed air maintenance device 2 has an electrically actuated, due to its function as "On" 14 designated multi-way valve.
  • the switch-on 14 is conveniently housed inside the device housing 5. It has a 3/3-valve functionality, so has three ways or connections and three possible switching positions. By way of example, it is realized in the form of a single valve unit, but it could also be realized by suitable interconnection of a plurality of valve units of lower functionality.
  • the switch-on valve 14 is preferably an electropneumatically pilot-operated valve, but it could also be designed as a directly electrically operable valve.
  • the switch-on valve 14 has an exemplary designed as a middle position first switching position, which is apparent from the drawing. On the basis of this, it can be selected by Activation each one of two electrically actuated valve actuators 15a, 15b are selectively switched to a second switching position or a third switching position. The second and third switching position remains in each case as long as the associated valve drive 15a, 15b is electrically activated.
  • the electric valve drive 15a, 15b is in particular a solenoid device, although other types of electric drive means can be used.
  • the three terminals of the on-off valve 14 form a feed input 16, a working output 17 and a vent outlet 18.
  • the feed input 16 is permanently connected to the device inlet 6 or forms this directly.
  • the working outlet 17 is permanently connected to the vent outlet 18 or forms this immediately.
  • the working outlet 17 is connected via an internal outlet channel 22 of the compressed air maintenance device 2 with the device outlet 7 in connection.
  • the outlet channel 22 expediently runs in the interior of the device housing 5.
  • the switch-on valve 14 can assume a shut-off position which, by way of example, corresponds to the middle position present in the unactuated state.
  • the working outlet 17 is separated from both the feed inlet 16 and the vent outlet 18.
  • the outlet channel 22 is shut off and the fluid volume contained therein and in the working line 13 and the adjoining channel system of the consumer device A is trapped.
  • the other two possible switching positions of the on-off valve 14 define a working position and a venting position.
  • the working position of the working output 17 is connected to the feed input 16 and simultaneously separated from the vent outlet 18.
  • the venting position the working outlet 17 is connected to the venting outlet 18 and simultaneously separated from the feed inlet 16.
  • the outlet channel 22 and with this the connected consumer device A is supplied in the working position of the on-valve 14 with compressed air from the compressed air source P and vented to the atmosphere in the venting position.
  • the switch-on valve 14 is held during the operating times of the connected consumer device A in the working position. During these operating times, the consumer device A works a predetermined operating cycle once or periodically. The course of this operating cycle is controlled by an external electronic control device 23, which communicates with the consumer device A in a manner not shown in a control-technical respect.
  • the switch-on valve 14 can be switched to the venting position, so that the consumer device A is vented and no dangerous situations can arise.
  • the switch-on valve 14 can be positioned in the shut-off position. As a result, the existing in the consumer device A volume of air is maintained and is available for the new operation recording again. This saves a complete renewed filling of the consumer device A with compressed air.
  • the compressed air maintenance device 2 is equipped with a pressure sensor 24 and with a flow sensor 25. Both sensors 24, 25 are expediently located in the interior of the device housing 5. In addition, both sensors 24, 25 communicate with the outlet channel 22, wherein the pressure sensor 24 is connected to the outlet channel 22 by way of example and the flow sensor 25 is switched into the course of the outlet channel 22.
  • the pressure sensor 24 is capable of measuring the pressure prevailing in the outlet channel 22, this pressure being referred to below as the outlet pressure.
  • the flow sensor 25 is capable of determining the current flow rate of the compressed air flowing through the outlet channel 22, that is to say the flow of this compressed air. In the following, this measured flow is referred to as outlet flow.
  • a pressure sensor belonging to the flow sensor 25 can also assume the function of the aforementioned pressure sensor 24, so that an independent pressure sensor 24 can be saved.
  • the compressed air maintenance device 2 contains a preferably housed inside the device housing 5 internal electronic control unit 26, which is equipped with at least one microprocessor or microcontroller. For the sake of simplicity, it will also be referred to below as “internal control unit 26".
  • the internal control unit 26 is signal-technically via internal electrical signal lines 27 of the compressed-air maintenance device 2 with the valve drives 15a, 15b of the on-off valve 14, with the pressure sensor 24 and with the flow sensor 25 connected.
  • the internal control unit 26 may receive electrical pressure readings and flow readings from the pressure sensor 24 and the flow sensor 25, respectively, and may output electrical actuation signals to the on-off valve 14.
  • the compressed air maintenance device 2 is equipped with an electrical interface which is designated below for better distinction as the first communication interface 28 and which enables signal-technical communication between the internal control unit 26 and the external electronic control unit 23.
  • the first communication interface 28 is arranged in particular on an outer side of the device housing 5 and expediently connected to the internal control unit 26 via internal electrical conductors 32.
  • the first communication interface 28 of electromechanical type and in particular designed as a plug connection device, so that a only schematically indicated external signal cable 33 can be connected in particular releasably, which allows connection to the external electronic control device 23.
  • the first communication interface 28 may also be designed as a wireless interface in order to be able to communicate with the external electronic control device 23 in particular via radio signals.
  • the first communication interface 28 is preferably a bus interface capable of transmitting serial bus signals between the internal control unit 26 and the external electronic control unit 23.
  • the external signal cable 33 like the internal electrical conductors 32, can be realized in the form of a serial bus system.
  • the internal control unit 26 has electronic storage means 34, comparator means 35 and output means 36.
  • pressure values of the outlet pressure measured by the pressure sensor 24 and flow values of the outlet flow rate measured by the flow sensor 25 can be stored as reference information and preferably also as actual information.
  • the comparator means 35 are able to compare stored reference information with, in particular, also cached or also directly measured actual information.
  • the output means 36 are capable of outputting an electrical diagnostic signal as a function of the comparison result determined by the comparator means 35.
  • the output means 36 of the internal control unit 26 preferably output the electrical diagnostic signal to the first communication interface 28, from where it can be transmitted to the external electronic control device 23 for further processing as required.
  • the electrical diagnostic signal can also be fed to optical display means 37 of the compressed air maintenance device 2 to visualize them in any way.
  • the compressed air maintenance device 2 is equipped with only indicated by dashed lines acoustic warning means 38, such as a buzzer, so that upon receipt of a corresponding diagnostic signal on site, an audible warning signal can be issued.
  • acoustic warning means 38 such as a buzzer
  • the internal control unit 26 is operable in a monitoring mode in which it can receive and process measurement signals originating from the pressure sensor 24 and / or from the flow sensor 25 as actual information. In this way The internal control unit 26 receives current values of the discharge pressure and / or the discharge flow rate as actual information in a time-dependent manner. The internal control unit 26 may be configured to output this actual information electrically or visually on the first communication interface 28 and / or on the optical display means 37.
  • the internal control unit 26 can also be operated in a teach-in mode, which can also be referred to as a teach mode.
  • the internal control unit 26 can record the already indicated reference information and store it in the storage means 34 for further processing.
  • the compressed air maintenance device 2 is expediently equipped with input means 42 which serve to activate the teach-in mode as required. It can also be provided that by means of these input means 42 it is possible to switch between the teach-in mode and the monitoring mode as required.
  • the internal control unit 26 is provided with an internal control program which provides for automatically switching to the monitoring mode when the teaching phase is completed.
  • the learning mode is expediently activated both in the shut-off position and in the working position of the switch-14.
  • a time-dependent pressure drop of the outlet pressure prevailing in the outlet channel 22 is recorded and stored as first reference information 43 in the storage means 34. This happens, for example, by pressing or pressing a key or a switch 42a of the input means 42 twice at any desired time interval.
  • the internal Control unit 26 then absorbs the pressure drop of the outlet pressure over time and forms a reference curve 43a illustrated in the exemplary embodiment as a straight line.
  • the course of the curve plays no role in the later evaluation, since ultimately only the absolute value of the pressure drop (p1-p2) during the measured time interval (t2-t1) is of importance.
  • a time-dependent flow profile Q (t) of the outlet flow 22 prevailing in the outlet channel 22 can be determined and stored in the form of second reference information 44 in the storage means 34 of the internal control unit 26 as well. This takes place during operation of the connected consumer device A, wherein the flow rate profile 44a forming the second reference information 44 preferably covers the duration of an entire processing cycle of the consumer device A.
  • the second reference information 44 is therefore conceivable as a curve representing the instantaneous exhaust flow at any time during a typical machining cycle.
  • the internal control unit 26 operating in monitoring mode can generate an electrical diagnostic signal from a comparison between measured actual information with the associated first or second reference information 43, 44, which provides information about the energy situation of the connected consumer device A.
  • the compressed air maintenance device 2 offers the possibility of carrying out a leakage monitoring when the shut-off valve 14 is in the shut-off position.
  • the internal control unit 26 recorded actual information supplied by the pressure sensor 24 during the shut-off position of the on-off valve 14 and compared with the first reference information 43 recorded and stored during the teach-in mode.
  • the time measuring interval for the recording of the actual information is the same as that in the recording of the first reference information 43, which is monitored and controlled via a control program contained in the internal control unit 26.
  • the actual pressure measurement should also take place with an output value of the outlet pressure which is at least approximately the same size as in the case of the reference pressure measurement, which is likewise monitored by the internal control unit 26. In this way it is ensured that the information to be compared can also be assigned to the same operating state.
  • the internal control unit 26 causes the output of a diagnostic signal via the output means 36, for example, when the pressure drop of the outlet pressure determined in the monitoring mode falls below the reference value recorded during the learning mode by a predetermined tolerance value.
  • the measurement of the actual information may be coupled to the switching operation of the on-valve 14.
  • the recording of the actual information for example, at the same time or at a predetermined time delay after the output of a switching signal, which is sent from the internal control unit 26 to the on-valve 14.
  • the output of a switching signal for the turn-on valve 14 may be used by the internal control unit 26 as an initiator for recording actual flow information.
  • the compressed air maintenance device 2 preferably opens alternatively or additionally the possibility of applying a trigger signal supplied by the connected electronic control device 23 as an initiator for the recording process of the actual information.
  • This trigger function of the external electronic control device 23 is especially advantageous in flow monitoring, because this provides the possibility of not only monitoring the operating cycle of the consumer device A on a flat-rate basis, but also of carrying out individual monitoring of one or more subcycles of the entire operating cycle.
  • the flow monitoring takes place when switched to the working position on valve 14.
  • compressed air normally flows from the compressed air source P to the consumer device A and operates there one or more activatable by fluid force working components of the consumer device A.
  • One or more of these working components are, for example, pneumatic actuators.
  • the internal control unit 26 is in particular designed such that it outputs an electrical diagnostic signal when a determined actual information differs by a predetermined tolerance value from the associated second reference information 44 recorded during the teach-in mode.
  • the tolerance values are expediently stored in the form of tolerance bands 45a, 45b in the internal control unit 26, which flank the characteristic curve 44a of the second reference information 44 above and below.
  • the tolerance values to be taken into account when generating the diagnostic signal are preferably input to the internal control unit 26 individually.
  • the user of the compressed air maintenance device 2 can thus adapt the tolerance values and thus the output of the diagnostic signal individually to his needs.
  • the already mentioned input means 42 that is, for example, an arrangement of keys and / or switches 42a and / or - for electronic input - an electrical interface formed, for example, by the first communication interface 28, to which an operating device and expediently / or a personal computer (PC) can be connected.
  • the input of the tolerance values is expediently carried out during the teach-in mode.
  • the compressed air maintenance device 2 can also offer the possibility of changing the tolerance values in the current monitoring mode in order to be able to flexibly take into account changed operating circumstances.
  • the teach-in mode can be individually parameterized by input means 42.
  • the parameterization can be done directly on the compressed air maintenance unit 2 by activating keys and / or switches 42a or by the external electronic control device 23 through the intermediary of the serial bus connection 33.
  • the parameterization can be used to specify, for example, how often actual information is evaluated in the internal control unit 26 during the relevant operating position of the on-off valve.
  • the change in the tolerance values for example the change in the bandwidth of the tolerance bands 45a, 45b, can also be subsumed under the term parameterization.
  • the compressed air maintenance device 2 is equipped with a further, second communication interface 29, which can be used as a diagnostic interface and to which in particular an electronic information reader 46 of the consumer control device 1 is at least temporarily connectable.
  • an information reader 46 makes it possible, for example, to read out measured actual information, in particular in conjunction with the assigned reference information, so that it is possible, for example in conjunction with the flow monitoring, to verify at the same time or subsequently at which point of the recorded reference profile an irregularity has occurred.
  • the internal control unit 26 is expediently designed or at least programmable such that it can initiate at least one further action in addition to the output of a diagnostic signal as a function of the comparison result ascertained by the comparator means 35.
  • a diagnostic signal as a function of the comparison result ascertained by the comparator means 35.
  • an additional function in causing a switching operation of the on-off valve 14.
  • the electrical diagnostic signal directly causes a switching operation of the on-valve 14.
  • the switch position of the switch-on valve 14 is expediently commanded exclusively by the external electronic control device 23, which supplies the necessary switchover signals via the first communication interface 28 into the internal control unit 26 feeds.
  • the latter acts as a mere transmitter of the switching signals to the on-off valve 14, without again processing in any form the switching signals obtained from the external electronic control device 23. In this way, the processor load of the microprocessor included in the internal control unit 26 is minimized.
  • the compressed air maintenance device 2 can be equipped with any other electrical interfaces. In this way, any number of switching outputs can be provided, the output of analog values is possible, or even a configuration by means of a connectable personal computer.
  • the connection of the preferably present external electronic control device 23 is carried out as mentioned expediently in serial signal transmission technology by a suitable bus, which may correspond, inter alia, the so-called IO-Link standard.
  • An advantage of the compressed air maintenance device 2 is its easy commissioning. In principle, it is sufficient to install the compressed air maintenance device 2 in an existing compressed air system and then teach it or teach. Then it is ready for use.
  • the connected consumer assembly A without venting its supply line 22, 13 can be shut off in pneumatic terms, so that no energy waste occurs during temporary downtime. Nevertheless, the three-position functionality of the on-off valve 14 makes it possible, if necessary, to vent the connected consumer device A.
  • the existing pressure sensor 24 compares the pressure drop in the outlet channel 22 after shutting off with a taught nominal course or reference curve and, if the pressure drop is too fast, gives a diagnostic signal. In this way, leakage monitoring of the consumer device A is possible.
  • the switch-on valve 14 assumes the working position, the profile of the flow value measured in the outlet channel 22 can be monitored in order to output a diagnostic signal in the event of deviations from the taught-in target value. In this way, consumption monitoring of the consumer device A is possible.
  • the compressed air maintenance device 2 When the compressed air maintenance device 2 is realized as a structural unit, it has compact dimensions and combines many functions in a small space.
  • the compressed air maintenance device 2 can also be equipped with reduced monitoring functionality by either only the outlet pressure or only the outlet flow is monitorable. In these cases, either the flow sensor 25 or the pressure sensor 24 can be dispensed with as a rule.
  • the dual implementation of both monitoring measures in one and the same compressed air maintenance device 2 is particularly advantageous because it ensures a particularly effective monitoring energy-related parameters.

Claims (16)

  1. Appareil d'entretien à air comprimé, qui dispose des composants qui suivent:
    - d'une soupape de mise en service (14) à actionnement électrique, qui présente une entrée d'alimentation (16) pouvant être reliée à une source d'air comprimé, une sortie d'aération (18) reliée à l'atmosphère et une sortie de travail (17) et qui peut être commutée dans une position de travail reliant la sortie de travail (17) à l'entrée d'alimentation (16) ainsi que dans une position d'aération reliant la sortie de travail (17) à la sortie d'aération (18),
    - d'une sortie d'appareil (7) pouvant être reliée à un système consommateur (A) externe, laquelle sortie d'appareil est reliée, par l'intermédiaire d'un canal de sortie (22), à la sortie de travail (17) de la soupape de mise en service (14),
    - d'un capteur de pression (24) adapté afin de mesurer la pression de sortie régnant dans le canal de sortie (22) et/ou un capteur de débit (25) adapté afin de mesurer le débit de sortie apparaissant dans le canal de sortie (22),
    - et d'une unité de commande (26) électronique interne, qui est reliée à la soupape de mise en service (14) ainsi qu'au capteur de pression (24) et/ou au capteur de débit (25) selon une technique relevant des signaux et qui peut fonctionner dans un mode de surveillance,
    caractérisé en ce
    - que la soupape de mise en service (14) dispose d'une fonctionnalité de distributeur à 3/3 voies et peut être commutée en supplément dans une position de fermeture, dans laquelle sa sortie de travail (17) reliée à la sortie de l'appareil (7) est isolée aussi bien de l'entrée d'alimentation (16) que de la sortie d'aération (18),
    - en ce que l'unité de commande (26) électronique interne peut fonctionner, en variante par rapport au mode de surveillance, dans la position de fermeture et/ou dans la position de travail, dans un mode de programmation, dans lequel, dans la position de fermeture, une chute de pression, dépendant du temps, de la pression de sortie et/ou, dans la position de travail, un profil de débit, dépendant du temps, du débit de sortie peuvent être déterminés et peuvent être stockés, sous la forme d'informations de référence (43, 44), dans des moyens de stockage (34) de l'unité de commande (26) électronique interne,
    - en ce que l'unité de commande (26) électronique interne dispose de moyens de comparaison (35), par lesquels, des informations réelles délivrées au cours du mode de surveillance par le capteur de pression (24) et/ou par le capteur de débit (25) peuvent être comparées aux informations de référence (43, 44) associées,
    - en ce que l'unité de commande (26) électronique interne dispose de moyens d'émission (36), qui peuvent émettre, en fonction du résultat de la comparaison des moyens de comparaison (35), un signal de diagnostic électrique.
  2. Appareil d'entretien à air comprimé selon la revendication 1, caractérisé en ce qu'il est réalisé sous la forme d'une unité modulaire.
  3. Appareil d'entretien à air comprimé selon la revendication 1 ou 2, caractérisé en ce qu'il est équipé de moyens d'affichage (34) optiques et/ou de moyens d'alerte (38) acoustiques pouvant être activés sur la base du signal de diagnostic électrique.
  4. Appareil d'entretien à air comprimé selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'il dispose d'au moins une interface de communication (28, 29) reliée à l'unité de commande (26) électronique interne, à laquelle un système électronique externe, en particulier un système de commande (23) électronique externe et/ou un appareil de lecture d'informations (46) électronique et/ou au moins un autre système électronique, peut être raccordé aux fins de la communication avec l'unité de commande (26) électronique interne, sachant qu'au moins une interface de communication (28, 29) est mise au point de manière appropriée en tant qu'interface de bus.
  5. Appareil d'entretien à air comprimé selon la revendication 4, caractérisé en ce qu'au moins une interface de communication (28, 29) est de type électromécanique, et/ou en ce qu'au moins une interface de communication (28, 29) est réalisée aux fins de la transmission de signal sans fil.
  6. Appareil d'entretien à air comprimé selon la revendication 4 ou 5, caractérisé en ce que l'unité de commande (26) électronique interne est réalisée afin de transmettre le signal de diagnostic électrique à au moins une interface de communication (28) de l'appareil d'entretien à air comprimé (2), et/ou
    en ce que l'unité de commande (26) électronique interne est réalisée sous la forme d'un transmetteur de signaux de commutation provenant d'un système de commande (23) électronique externe raccordé à une interface de communication (28) à la soupape de mise en service (14), en particulier de telle manière que des signaux de commutation injectés par l'intermédiaire de l'interface de communication (28) peuvent être transférés sans traitement par l'unité de commande (26) électronique interne directement à la soupape de mise en service (14).
  7. Appareil d'entretien à air comprimé selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'il est équipé de moyens de saisie (42) servant à activer et/ou à paramétrer le mode de programmation, sachant que les moyens de saisie (42) contiennent de manière appropriée au moins une touche (42a) et/ou au moins un commutateur (42a) et/ou au moins une interface (28) électrique.
  8. Appareil d'entretien à air comprimé selon l'une quelconque des revendications 1 à 7, caractérisé en ce que l'enregistrement des informations réelles a lieu dans un laps de temps identique à celui de l'enregistrement des informations de référence associées.
  9. Appareil d'entretien à air comprimé selon l'une quelconque des revendications 1 à 8, caractérisé en ce qu'un signal de commutation défini pour la soupape de mise en service (14), généré et émis par l'unité de commande (26) électronique interne ou un signal de déclenchement délivré par un système de commande (23) électronique externe font office d'élément de lancement de l'enregistrement des informations réelles lors du mode de surveillance.
  10. Appareil d'entretien à air comprimé selon la revendication 9, caractérisé en ce que les informations réelles peuvent être enregistrées par l'unité de commande (26) électronique interne dès l'émission d'un signal de commutation déterminé pour la soupape de mise en service (14), ou, à cet égard, avec un décalage dans le temps d'un laps de temps spécifié.
  11. Appareil d'entretien à air comprimé selon la revendication 9 ou 10, caractérisé en ce que des informations réelles du capteur de pression (24) sont enregistrées dès l'émission d'un signal de commutation commutant la soupape de mise en service (14) dans la position de fermeture ou avec un décalage dans le temps après l'émission de ce dernier afin de permettre en particulier une surveillance des fuites par la comparaison desdites informations réelles, qui suit leur enregistrement, avec les informations de référence (43) associées.
  12. Appareil d'entretien à air comprimé selon l'une quelconque des revendications 9 à 11, caractérisé en ce que des informations réelles du capteur de débit (25) sont enregistrées une fois ou à plusieurs reprises dès l'émission d'un signal de commutation commutant la soupape de mise en service (14) dans la position de travail ou avec un décalage dans le temps après l'émission de ce dernier afin de permettre en particulier une surveillance de la consommation d'air par la comparaison desdites informations réelles, qui suit leur enregistrement, avec les informations de référence (44) associées.
  13. Appareil d'entretien à air comprimé selon l'une quelconque des revendications 1 à 12, caractérisé en ce que des valeurs de tolérance sont enregistrées ou peuvent être enregistrées dans l'unité de commande (26) électronique interne, lesquelles sont prises en considération lors de la production du signal de diagnostic électrique à émettre, sachant que les valeurs de tolérance peuvent se présenter sous la forme d'au moins une bande de tolérance.
  14. Appareil d'entretien à air comprimé selon la revendication 13, caractérisé en ce que les valeurs de tolérance peuvent être saisies au choix individuellement et librement en particulier au moyen de moyens de saisie (42) disponibles de l'appareil d'entretien à air comprimé (2) et/ou par l'intermédiaire d'une interface (28, 29) électrique de l'appareil d'entretien à air comprimé (2).
  15. Appareil d'entretien à air comprimé selon l'une quelconque des revendications 1 à 14, caractérisé en ce que l'unité de commande (26) électronique interne est réalisée afin d'entraîner une opération de commutation de la soupape de mise en service (14) en fonction du résultat de la comparaison des moyens de comparaison (35).
  16. Dispositif de commande de consommateur comprenant au moins un appareil d'entretien à air comprimé (2) selon l'une quelconque des revendications précédentes 1 à 15 et comprenant un système de commande (23) électronique externe raccordé ou pouvant être raccordé audit appareil d'entretien à air comprimé.
EP12703245.6A 2011-02-26 2012-02-04 Appareil d'entretien à air comprimé et dispositif de commande d'utilisateur équipé de ce dernier Active EP2622229B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011012558A DE102011012558B3 (de) 2011-02-26 2011-02-26 Druckluft-Wartungsgerät und damit ausgestattete Verbrauchersteuervorrichtung
PCT/EP2012/000503 WO2012113504A1 (fr) 2011-02-26 2012-02-04 Appareil d'entretien à air comprimé et dispositif de commande d'utilisateur équipé de ce dernier

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EP2622229A1 EP2622229A1 (fr) 2013-08-07
EP2622229B1 true EP2622229B1 (fr) 2015-08-19

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US (1) US20130323088A1 (fr)
EP (1) EP2622229B1 (fr)
CN (1) CN103380304B (fr)
DE (1) DE102011012558B3 (fr)
WO (1) WO2012113504A1 (fr)

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DE102013015105A1 (de) 2013-09-12 2015-03-12 Festo Ag & Co. Kg Druckluft-Wartungsgerät, damit ausgestattete Verbrauchersteuervorrichtung und zugehöriges Betriebsverfahren
JP2018513380A (ja) * 2015-04-20 2018-05-24 ネクスマティクス・エル・エル・シー 方向制御バルブを使用する漏れ検出のためのシステムおよび方法
DE102015007147A1 (de) * 2015-06-03 2016-12-08 Samson Aktiengesellschaft Elektro-pneumatischer Aktor
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JP6704247B2 (ja) * 2015-12-25 2020-06-03 株式会社日立産機システム 空圧システム運転制御装置および制御方法
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DE102011012558B3 (de) 2012-07-12
CN103380304B (zh) 2016-05-11
US20130323088A1 (en) 2013-12-05
EP2622229A1 (fr) 2013-08-07
CN103380304A (zh) 2013-10-30

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