EP1402216B1 - Sicherheitsvorrichtung für grossfeuerungsanlge mit auf einer leiterplatte montierten relais - Google Patents

Sicherheitsvorrichtung für grossfeuerungsanlge mit auf einer leiterplatte montierten relais Download PDF

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Publication number
EP1402216B1
EP1402216B1 EP02738266A EP02738266A EP1402216B1 EP 1402216 B1 EP1402216 B1 EP 1402216B1 EP 02738266 A EP02738266 A EP 02738266A EP 02738266 A EP02738266 A EP 02738266A EP 1402216 B1 EP1402216 B1 EP 1402216B1
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EP
European Patent Office
Prior art keywords
chain
printed circuit
safety
relay
safety device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02738266A
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English (en)
French (fr)
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EP1402216A1 (de
Inventor
Charles Jacobberger
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.)
Stein Energie Chaudieres Industrielles
Original Assignee
Stein Energie Chaudieres Industrielles
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Publication date
Application filed by Stein Energie Chaudieres Industrielles filed Critical Stein Energie Chaudieres Industrielles
Publication of EP1402216A1 publication Critical patent/EP1402216A1/de
Application granted granted Critical
Publication of EP1402216B1 publication Critical patent/EP1402216B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/26—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
    • F23N5/206—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays using electrical or electromechanical means

Definitions

  • the invention relates to a safety device for an industrial boiler comprising electromechanical relays connected to form an electromechanical safety chain.
  • the invention applies in particular to industrial boilers comprising for example a gas burner for producing steam or superheated water.
  • Such boilers are provided with a safety device which is interposed between one or more sensors and one or more actuators mounted on the boiler to trigger via the actuators a boiler shutdown when at least one sensor detects a malfunction of the boiler. boiler.
  • This defect can be excessive pressure, too low a water level or a problem in the burner flame.
  • such a safety device is able to open a supply circuit of the actuators on detection of a fault by a sensor.
  • Actuators that can be for example solenoid valves are designed to trigger a shutdown of the boiler as soon as they are no longer supplied with power by the supply circuit.
  • Each sensor supplies 230 volts AC power to the safety device during normal operation of the boiler and does not supply this current when a fault is detected.
  • Such an arrangement forms a so-called "positive" security in which a break in the power supply triggers the shutdown of the boiler.
  • each sensor corresponds to a relay which is kept energized when it is powered by the current supplied by the corresponding sensor and the contacts of the relays corresponding to the different sensors are for example connected in series to form a chain of electromechanical safety in the form of wired logic.
  • the electrical circuit corresponding to this electromechanical safety chain is closed in the event of normal operation of the boiler and is open in the event of an anomaly therein. It is known in such a safety device to add to the electromechanical safety chain a so-called computer security chain operating in parallel and redundantly to the electromechanical safety chain when the automation and the regulation of the boiler become complex and require the use of an industrial programmable logic controller.
  • the computer security chain is generally consisting of a data processing circuit such as a microprocessor which receives as input the electrical signals produced by the sensors and converted into computer signals at 5 volts and which feeds through a transistor controlling a relay the power supply circuit of the actuators .
  • the output of the data processing circuit is for example wired in series in the electromechanical safety chain which constitutes the main security chain.
  • the standard NF D36504 more particularly specifies (ch 4.2) that the evaluation of the dependability of a computer security chain must be carried out by a specific test procedure, by injecting directly on the error equipment for the purpose of simulating an internal fault: a failure of all memory bits taken one by one is simulated.
  • ch 4.2 the evaluation of the dependability of a computer security chain must be carried out by a specific test procedure, by injecting directly on the error equipment for the purpose of simulating an internal fault: a failure of all memory bits taken one by one is simulated.
  • Such a test is particularly long to perform, considerably increases the tests that precede the first commissioning of such a boiler and increases its cost accordingly.
  • the object of the invention is to overcome these disadvantages.
  • the subject of the invention is a safety device for an industrial boiler comprising electromechanical relays connected to form an electromechanical safety chain, characterized in that the relays are mounted on a support in the form of a printed circuit board.
  • the electrical connections between the relays are constituted by the tracks of the printed circuit so that it is no longer possible for an operator to modify the operating logic of the electromechanical safety chain.
  • these relays are directly soldered on a printed circuit board and the connection on the input / output boards is effected by means of removable plugs equipped with a coding device.
  • These printed circuit boards can be mounted in a compact housing possibly sealed so that it is impossible for an operating operator to access the entire electromechanical safety chain.
  • current converters associated respectively with relays of the electromechanical safety chain are provided for converting an electrical input signal of a relay into an electronic signal, the electronic signals provided by the converters being processed in a logic integrated circuit constituting with the converters a redundant electronic safety chain to the electromechanical safety chain.
  • a logic integrated circuit constituting with the converters a redundant electronic safety chain to the electromechanical safety chain.
  • a relay and the current converter associated with the relay are mounted on the same printed circuit board so as to obtain a compact arrangement of the safety device.
  • each current converter is an opto-coupler so as to electrically isolate the two electromechanical and electronic safety chains. In this way, an electrical fault in the electromechanical safety chain does not affect the operation of the electronic safety chain.
  • the electronic signals are converted into computer signals via microcontrollers to be sent to a redundant computer security chain to the electronic security chain which allows to reinforce the degree of security of the security device without increasing its complexity of implementation since this computer security chain constituting a third security chain, is not subject to the test procedures according to NF D36504 described above.
  • the device according to the invention is connected to at least one sensor PT n and at least one actuator EV m which are generally mounted in the industrial boiler CHA.
  • the sensor PT n which is here a pressure switch sends an electric current l n to a safety device DS which is here mounted in an electrical cabinet AE.
  • the safety device On receipt of this current l n , the safety device in turn returns a second electric current J m towards the actuator EV m which is here a solenoid valve, to maintain this actuator in a normal operating position. If the current l n is not received, the safety device DS controls an opening relay (not shown) of the power supply circuit of the actuator EV to cancel the current J m , and thus trigger the shutdown. of the boiler.
  • the security device DS comprises a housing enclosing printed circuit boards hereinafter called printed circuits which form an electromechanical safety chain CH1.
  • This housing comprises one or more printed circuit boards on which the relays forming the first safety chain CH1 are mounted, such that these relays are not interconnected by wired logic, but by conductive tracks of the printed circuits.
  • This type of boiler generally comprises a plurality of sensors associated with a plurality of actuators, and the housing may contain for example several printed circuits Cl A , Cl B , Cl C to manage the various sensors of the boiler, as shown in FIG. 3.
  • these circuits are pinned in connectors of a card called backplane card (not shown) which is also equipped with connectors providing the electrical connection with the sensors and with the actuators.
  • each printed circuit CI A, CI B, CI C comprises a relay RE n which is kept closed if it receives a current l n of the corresponding sensor PT n to form the conventional electromechanical safety chain CH1.
  • the circuits Cl A , Cl B and Cl C have their outputs combined in a main circuit CIP visible in FIG. 3 which comprises the connections forming the first security chain CH1. This main circuit is also mounted on the backplane board.
  • the security device includes a second security chain CH2 redundant to the first, the second chain being electronic.
  • This electronic chain is also able to open the power supply circuit of the EVm actuator to cut off its power supply in case of non-receipt of an electric current In.
  • the advantage of an electronic management for this second chain is validation tests are simpler than in the context of computerized management.
  • This CH2 electronic chain can be mounted in a separate housing, and connected to the backplane board by specific connectors. But it can advantageously be integrated into the printed circuits that define the electromechanical chain, as explained below.
  • the current In supplied by a sensor PT n is converted in the printed circuit on which is mounted the corresponding relay RE n by a corresponding converter OC n to an electronic signal.
  • This electronic signal is a direct current under 12 Volts intended to be received by a logic integrated circuit CIL to form the second security chain CH2.
  • the logic integrated circuit CIL can be mounted on the main printed circuit board CIP of the safety device DS, this main circuit being itself connected to the backplane board.
  • the main printed circuit CIP receives the electronic signals produced by each printed circuit Cl A , Cl B , Cl c to control an opening relay of the power supply circuit of the actuator EV m on the order of the logic integrated circuit CIL .
  • Such a logic integrated circuit will advantageously be realized for example with a "PAL” type circuit.
  • PAL programmable logic circuit
  • These "PAL” circuits operate under 12 Volts and allow to realize at least cost logical operators between input channels and output channels. They are permanently configured by electrical breakdown.
  • FIG 2 there is shown a printed circuit Cl A , Cl B , Cl c also called electronic card receiving the current l n of a single sensor.
  • the same card can receive currents l n provided by several sensors, so as to manage all the sensors of a body of the boiler such as for example the burner.
  • the card comprises a relay and an optocoupler for each sensor, the relays being put in series on the card so as to provide a single output for the electromechanical safety chain CH1.
  • the electronic signals from the various optocouplers are then combined through a local logic integrated circuit which is also mounted on the card Cl A , Cl B , Cl C. This circuit thus provides a single electronic output signal reflecting the state of the member concerned, for the electronic security chain CH2.
  • the security device according to the invention may also comprise a third redundant security chain CH3 to the other security chains CH1 and CH2, this third channel being computerized.
  • each printed circuit CI includes a microcontroller which converts the electronic signal 12 Volts into a computer signal clocked by a clock contained in the microcontroller. This computer signal is emitted at about 5 volts.
  • the various computer signals are collected by the main circuit board CIP.
  • This CIP circuit is equipped with a microcontroller bringing together the various computer signals, and which communicates with a microprocessor MP to form the third security chain.
  • the microprocessor MP also communicates with the microcontroller MCP to trigger a shutdown of the boiler on the order of the computer program for managing the third channel.
  • the microprocessor then opens the relay for opening the power supply circuit of the actuators or EV m through a transistor which is mounted on the main printed circuit.
  • the microcontroller MC of this printed circuit can be a parallel-serial converter.
  • Such a converter receives as input the electronic signals under 12 volts of each sensor and outputs a serial computer signal clocked at 5 volts reflecting the state of each of the sensors managed by the circuit Cl A , Cl B , Cl c .
  • the microcontroller MCP of the main printed circuit is able to communicate to the microprocessor MP computer data defining the precise state of each sensor of the boiler.
  • the security device according to the invention with a heterogeneous redundancy gives rise to an improved compactness and an increased degree of security since an operating operator can not modify its configuration.
  • the implementation of a third computer security chain makes it possible to connect the boiler to an information system giving an accurate indication of the state of each sensor of the boiler.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Safety Devices In Control Systems (AREA)
  • Burglar Alarm Systems (AREA)
  • Protection Of Static Devices (AREA)
  • Electric Stoves And Ranges (AREA)
  • Constitution Of High-Frequency Heating (AREA)
  • Fire Alarms (AREA)
  • Cookers (AREA)
  • Selective Calling Equipment (AREA)

Claims (5)

  1. Sicherheitsvorrichtung für einen industriellen Heizkessel (CHA), umfassend elektromechanische Relais (REn), die unter Bildung einer elektromechanischen Sicherheitskette (CH1) verbunden sind, wobei jedes Relais (REn) in Form einer Leiterplatte (ClA, ClB, Clc, CIP) auf einem Träger montiert ist, Stromumformer (OCn), die jeweils mit Relais der elektromechanischen Sicherheitskette (CH1) assoziiert sind und zur Umwandlung eines elektrischen Eingangssignals eines Relais in ein elektronisches Signal vorgesehen sind, wobei die von den Umformern gelieferten elektronischen Signale in einem logischen integrierten Schaltkreis (CIL) verarbeitet werden, der mit den Umformern eine bezüglich der elektromechanischen Sicherheitskette (CH1) gedoppelte elektronische Sicherheitskette (CH2) darstellt.
  2. Vorrichtung nach Anspruch 1, in der ein Relais (REn) und der mit dem Relais assoziierte Stromumformer (OCn) auf der gleichen Leiterplatte (ClA, ClB, Clc) montiert sind.
  3. Sicherheitsvorrichtung nach den Ansprüchen 1 oder 2, in der jeder Stromumformer (OCn) ein optoelektrisches Koppelelement ist.
  4. Sicherheitsvorrichtung nach einem der Ansprüche 1 bis 3, in der der logische integrierte Schaltkreis (CIL) ein programmierbarer Schaltkreis vom Typ "PAL" ist.
  5. Sicherheitsvorrichtung nach einem der Ansprüche 1 bis 4, in der die elektrischen Signale durch Mikrosteuerbausteine (MC) umgewandelt werden, um zu einer bezüglich der elektronischen Sicherheitskette gedoppelten Informations-Sicherheitskette (CH3) geschickt zu werden.
EP02738266A 2001-06-20 2002-05-17 Sicherheitsvorrichtung für grossfeuerungsanlge mit auf einer leiterplatte montierten relais Expired - Lifetime EP1402216B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0108095 2001-06-20
FR0108095A FR2826433B1 (fr) 2001-06-20 2001-06-20 Dispositif de securite pour chaudiere industrielle comprenant des relais montes sur une carte de circuit imprime
PCT/FR2002/001675 WO2003001116A1 (fr) 2001-06-20 2002-05-17 Dispositif de securite pour chaudiere industrielle comprenant des relais montes sur une carte de circuit imprime.

Publications (2)

Publication Number Publication Date
EP1402216A1 EP1402216A1 (de) 2004-03-31
EP1402216B1 true EP1402216B1 (de) 2007-02-21

Family

ID=8864545

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02738266A Expired - Lifetime EP1402216B1 (de) 2001-06-20 2002-05-17 Sicherheitsvorrichtung für grossfeuerungsanlge mit auf einer leiterplatte montierten relais

Country Status (8)

Country Link
US (1) US7385316B2 (de)
EP (1) EP1402216B1 (de)
CN (1) CN1278072C (de)
AT (1) ATE354767T1 (de)
CA (1) CA2451033C (de)
DE (1) DE60218310T2 (de)
FR (1) FR2826433B1 (de)
WO (1) WO2003001116A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8013295B2 (en) * 2008-11-21 2011-09-06 Schlumberger Technology Corporation Ion mobility measurements for formation fluid characterization

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2243622A7 (en) * 1973-09-08 1975-04-04 Interliz Anstalt Programmable regulator for a heater - has printed circuits with thermostatic control circuits
US4334258A (en) * 1980-06-23 1982-06-08 Seeman Jeffrey L Explosion prevention control system for a fuel-gas burning automatic ignition appliance and associated gas distribution system
US5655009A (en) * 1992-03-19 1997-08-05 Fujitsu Limited Modem unit
US5549469A (en) * 1994-02-28 1996-08-27 Eclipse Combustion, Inc. Multiple burner control system
US5910837A (en) * 1994-05-24 1999-06-08 International Business Machines Corporation Photomechanical transducer
DE19523817A1 (de) * 1995-06-29 1997-01-02 Elco Kloeckner Heiztech Gmbh Feuerungsanlage sowie Verfahren zum Regeln, Steuern und/oder Überwachen einer Feuerungsanlage
JPH0926391A (ja) * 1995-07-13 1997-01-28 Cosmo Sogo Kenkyusho:Kk 重質油成分の定量方法及び装置
US6714000B2 (en) * 1999-06-14 2004-03-30 Genscape, Inc. Method for monitoring power and current flow
US6681011B1 (en) * 2000-04-11 2004-01-20 General Electric Company Method and modem circuit using a dither signal for determining connection status of a phone line
US6584560B1 (en) * 2000-04-19 2003-06-24 Dell Usa, L.P. Method and system for booting a multiprocessor computer
US20020135414A1 (en) * 2001-02-13 2002-09-26 Mccall Hiram Acceleration signal amplifier with signal centering control technology

Also Published As

Publication number Publication date
CN1518655A (zh) 2004-08-04
CN1278072C (zh) 2006-10-04
FR2826433A1 (fr) 2002-12-27
WO2003001116A1 (fr) 2003-01-03
US7385316B2 (en) 2008-06-10
DE60218310D1 (de) 2007-04-05
ATE354767T1 (de) 2007-03-15
CA2451033C (fr) 2010-05-04
US20040214119A1 (en) 2004-10-28
DE60218310T2 (de) 2008-01-03
FR2826433B1 (fr) 2003-12-19
CA2451033A1 (fr) 2003-01-03
EP1402216A1 (de) 2004-03-31

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