WO2012113504A1 - 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
WO2012113504A1
WO2012113504A1 PCT/EP2012/000503 EP2012000503W WO2012113504A1 WO 2012113504 A1 WO2012113504 A1 WO 2012113504A1 EP 2012000503 W EP2012000503 W EP 2012000503W WO 2012113504 A1 WO2012113504 A1 WO 2012113504A1
Authority
WO
WIPO (PCT)
Prior art keywords
compressed air
air maintenance
electronic control
maintenance device
valve
Prior art date
Application number
PCT/EP2012/000503
Other languages
German (de)
English (en)
Inventor
Ralf Medow
Michael Streck
Rolf Hartnagel
Original Assignee
Festo Ag & 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 Ag & Co. Kg filed Critical Festo Ag & Co. Kg
Priority to EP12703245.6A priority Critical patent/EP2622229B1/fr
Priority to CN201280010458.4A priority patent/CN103380304B/zh
Priority to US13/985,148 priority patent/US20130323088A1/en
Publication of WO2012113504A1 publication Critical patent/WO2012113504A1/fr

Links

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 relates to a compressed air service device which has the following components: an electrically actuatable start - up valve which has a feed input connectable to a compressed air source, a venting output connected to the atmosphere and a working output and which connects into a working position connecting the work output to the feed input and in a bleeding position connecting the working outlet to the bleeding outlet, a device outlet connectable to an external consumer device connected to the working outlet of the on-off valve via an outlet channel, a pressure sensor suitable for measuring the outlet pressure prevailing in the outlet channel and / or one for measurement of the exhaust flow occurring in the exhaust passage, and an internal electronic control unit connected to the on-off valve and to the pressure sensor and / or the flow sensor si is technically connected and which is operable in a monitoring mode.
  • the invention further relates to a suitable for controlling a consumer device consumer control device, which is equipped with at least one compressed air maintenance device of the aforementioned type and an electronic control device connected thereto or connectable.
  • a trained in the aforementioned sense of the prior art is known from DE 19746179 C2.
  • 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 several modules, among which, for example, a start-up 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.
  • DE 10355250 A1 describes a method and an associated device for determining the 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 the pressure measured value and the volumetric flow measured value are brought into a specific relationship based on a physical equation 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 work- gear 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 on-off valve remains in the working position, compressed air is constantly pressed into the outlet channel under high pressure despite the non-operated consumer device, which is lost in part because of unavoidable leakage.
  • the switch-on valve is switched to the venting position, a complete draining of the outlet duct and the connected thereto consumer device takes place, so that at a new start of operation of the consumer device, 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 on-off valve has a 3/3 valve functionality and is additionally switchable to a shut-off position in which its working outlet connected to the appliance outlet is disconnected from both the feed inlet and the vent outlet, during the shut-off position and / or during the shut-off position the working position can be operated as an alternative to the monitoring mode in a teach-in mode in which a time-dependent pressure drop of the outlet pressure during the shut-off position and / or a time-dependent flow profile of the outlet flow during the working position can be determined and stored in memory means of the internal electronic control unit in the form of reference information, that the internal electronic control unit over
  • Has comparator means whereby the actual information provided by the pressure sensor and / or the flow sensor during the monitoring mode is comparable to the associated reference information, and the internal electronic control unit has output means which output an electrical diagnostic signal in response to the comparison result of the comparator means can.
  • 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 rom”, “flow rate” or “flow rate n " 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 switching positions. It is advantageous that, in addition to the default possible working position either a venting position or a shut-off is feasible to the located in the outlet and the external consumer device connected thereto
  • 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 when 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 in the form of a self-supporting assembly in which all its components are integrated, so that a very kompak te and easily integrated into existing compressed air networks compressed air maintenance unit is present.
  • the compressed air service device is equipped with a flow sensor which determines the flow rate based on determined pressure values, especially 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 become. A separate pressure sensor is then unnecessary.
  • the compressed air service device is expediently equipped directly with visual 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 states 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 can be equipped with at least one communication interface, to which an insbesonde re acting as a higher-level control external electronic control device and / or an electronic information onsauslese réelle and / or at least one other external electronic device can connect.
  • 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 with 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 load on the at least one NEN belonging to the internal electronic control device microprocessor.
  • the compressed air service device is expediently equipped with suitable input devices.
  • suitable input devices 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 for the teaching or teaching to be performed purely electrically, for example via a special operating device or by an external electronic control device that usually communicates with the compressed air maintenance device, for which purpose the compressed air service 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 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 can be designed to function as a function of the comparison result of the means to cause a switching operation of the on-off valve. For example, a switching over of the on-off valve into the shut-off position can be caused if no appreciable flow in the outlet duct is detected during the working position over a relatively long period of time.
  • Figure 1 shows a schematic representation of a preferred construction of the consumer control device according to the invention with an integrated therein 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 maintenance device 2.
  • This compressed air maintenance device 2 can, if necessary, together with other maintenance modules, one of which is indicated by dash-dotted lines in 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 service 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 communicate with a compressed air source P via a fluid line designated as a feed line 12. to be bound. 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 ten over several fluid-operated Häkomponen equipped machine - is 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 service device 2 has an electrically actuated multi-way valve, designated as "start-up valve” 14 due to its function.
  • the switch-on valve 14 is expediently accommodated in the interior of the device housing 5. It has a 3/3 valve functionality, ie it has three paths or connections By way of example, it may be realized in the form of a single valve unit, but it could also be realized by suitably connecting a plurality of valve units of lower functionality
  • the on-off valve 14 is an electro-pneumatically pilot-operated valve, but it could be designed as a directly electrically actuated valve.
  • the on-valve 14 has an exemplary designed as a middle position first switching position, which is apparent from the drawing voltage. Starting from this, it can be selected by wise activation of 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 to the appliance outlet 7 via an internal outlet channel 22 of the compressed air maintenance device 2.
  • 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 two other 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 4 separated from the vent outlet 18.
  • the venting position the working outlet 17 is connected to the venting outlet 18 and at the same time 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 bleeding position, so that the consumer device A is vented and no dangerous situations can arise.
  • the compressed air service 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, ie the flow of these. Compressed air to determine. 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 an internal electronic control unit 26 preferably accommodated in the interior of the device housing 5, 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-controlled via internal electrical signal lines 27 of the compressed-air service 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 service device 2 is equipped with an electrical interface designated below for better distinction as the first communication interface 28, 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 used as reference information and preferably also as actual information save.
  • 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 gives the internal control unit 26 the electrical diagnostic signal to the first one
  • Communication interface 28 from where it can be communicated to the external electronic control device 23 for further processing as needed.
  • the electrical diagnostic signal may also be supplied to optical display means 37 of the compressed air service device 2 for visualization in any manner.
  • 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 can be operated 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 receives the internal control unit 26 time-dependent current values of the outlet pressure and / or the outlet flow as actual information.
  • 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 control unit 26 then assumes 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 can thus be imagined as a curve representing the instantaneous discharge flow rate at any point in time during a typical processing cycle.
  • the operating in the monitoring mode internal control unit 26 from a comparison between measured actual information with the associated first or second reference information 43, 44 generate an electrical diagnostic signal that provides information about the energetic situation of the connected consumer device A.
  • the compressed air maintenance device 2 in particular offers the possibility of carrying out a leakage monitoring when the shut-off valve 14 is in the shut-off position.
  • 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 during the shut-off position of the on-valve 14 from the pressure sensor 24 supplied actual information and with the during the
  • the time measurement interval for the acquisition of the actual information here is the same as that in the recording of the first reference information 43, which is monitored and controlled by a control program contained in the internal control unit 26. If possible, 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 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 teach-in mode by a predetermined tolerance value.
  • the measurement of the actual information may be coupled to the switching operation of the on-off 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 intended for the on-off valve 14 can be used by the internal control unit 26 as an initiator for the recording of actual flow information.
  • the internal control unit 26 it is also possible to record actual information only once or multiple times during the monitoring of the output flow rate, it being possible to record actual information several times, in particular with temporal regularity.
  • the compressed air maintenance device 2 preferably opens alterna-. tively or additionally the possibility of a supplied from the connected electronic control device 23
  • Trigger signal as 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 actuates one or more working components of the consumer device A that can be activated by means of fluid force.
  • working components are, for example, pneumatic drives.
  • the internal control unit 26 is in particular designed such that it outputs an electrical diagnostic signal when a determined actual information deviates 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 immediacy ⁇ bar on the compressed air maintenance device 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, for example, to specify how frequently actual information is evaluated in the internal control unit 26 during the relevant operating position of the switch-on 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 associated 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.
  • such an additional function is to initiate a switching operation of the on-off valve 14.
  • the same is, for example, then switched from the working position to the shut-off position, if during a longer Period, which in particular is freely parameterizable, in the outlet channel 22 no or at least no appreciable outlet flow is available.
  • the electrical diagnostic signal directly causes a switching operation of the on-valve 14.
  • the switching 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 control unit Communications interface 28 in the internal control unit 26 feeds.
  • the latter acts as a mere transmitter of the switching signals to the switch-on valve 14, without again processing the switching signals obtained from the external electronic control device 23 in any form. 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, in that either only the outlet pressure or only the outlet flow can be monitored. 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 particularly effective monitoring of energy-related parameters.

Abstract

L'invention concerne un appareil d'entretien à air comprimé (2) et un dispositif de commande de consommateur (1) équipé de ce dernier, l'appareil d'entretien à air comprimé (2) disposant d'une soupape de démarrage (14) à fonctionnalité 3/3 voies. La soupape de démarrage (14) permet entre autres d'alimenter un canal d'évacuation (22) menant à un dispositif consommateur (A) de manière sélective en air comprimé ou de le couper de l'alimentation en air comprimé. Un capteur de pression (24) et/ou un capteur de débit (25) permettent d'enregistrer des informations réelles relatives à la pression et/ou au débit et de les comparer à des informations de référence enregistrées au préalable dans un mode programmation. Un signal de diagnostic électrique peut être produit en fonction du résultat de la comparaison, de telle sorte qu'il est possible entre autres de surveiller une fuite ou une consommation d'air excessive du côté du dispositif consommateur (A).
PCT/EP2012/000503 2011-02-26 2012-02-04 Appareil d'entretien à air comprimé et dispositif de commande d'utilisateur équipé de ce dernier WO2012113504A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP12703245.6A EP2622229B1 (fr) 2011-02-26 2012-02-04 Appareil d'entretien à air comprimé et dispositif de commande d'utilisateur équipé de ce dernier
CN201280010458.4A CN103380304B (zh) 2011-02-26 2012-02-04 压缩空气维护仪器和装备有其的消耗器控制装置
US13/985,148 US20130323088A1 (en) 2011-02-26 2012-02-04 Compressed Air Maintenance Unit and Consumer Control Device Equipped with the Same

Applications Claiming Priority (2)

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DE102011012558A DE102011012558B3 (de) 2011-02-26 2011-02-26 Druckluft-Wartungsgerät und damit ausgestattete Verbrauchersteuervorrichtung
DE102011012558.2 2011-02-26

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WO2012113504A1 true WO2012113504A1 (fr) 2012-08-30

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EP (1) EP2622229B1 (fr)
CN (1) CN103380304B (fr)
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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
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AT517432B1 (de) * 2015-06-24 2017-09-15 Engel Austria Gmbh Pneumatiksystem und Verfahren zum Betrieb oder zur Inbetriebnahme desselben
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
EP3236328B8 (fr) * 2016-04-21 2019-03-06 Kaeser Kompressoren SE Procede d'analyse de la securite d'alimentation en air comprime d'une installation a air comprime
DE112017006706B4 (de) * 2017-05-03 2021-12-23 Festo Se & Co. Kg Elektropneumatisches Steuergerät und damit ausgestattete Prozesssteuervorrichtung
DE102017207414A1 (de) * 2017-05-03 2018-11-08 Festo Ag & Co. Kg Pneumatische Steuervorrichtung und damit ausgestattete Prozesssteuervorrichtung
AT520061B1 (de) * 2017-06-08 2019-05-15 Sackl Rudolf Vorrichtung zur Überwachung von Druckluft
WO2019060514A1 (fr) * 2017-09-22 2019-03-28 Engineered Corrosion Solutions, Llc Dispositifs de maintenance d'air pouvant être commandés pour systèmes de protection contre les incendies
DE102018202416A1 (de) * 2018-02-16 2019-08-22 Festo Ag & Co. Kg Verbrauchersteuervorrichtung und Steuerungsverfahren
WO2020138393A1 (fr) * 2018-12-28 2020-07-02 ナブテスコオートモーティブ株式会社 Système d'alimentation en air
IT202000012010A1 (it) * 2020-05-22 2021-11-22 Safen Fluid & Mech Engineering S R L Dispositivo per la diagnostica di impianti pneumatici
WO2024004092A1 (fr) * 2022-06-29 2024-01-04 Smc株式会社 Dispositif de commande de fluide, appareil d'alimentation en pression de fluide, et procédé de commande de fluide

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CN103380304A (zh) 2013-10-30
US20130323088A1 (en) 2013-12-05
CN103380304B (zh) 2016-05-11
EP2622229A1 (fr) 2013-08-07
DE102011012558B3 (de) 2012-07-12

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